Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /***************************************************************************** |
| 2 | * sdla_x25.c WANPIPE(tm) Multiprotocol WAN Link Driver. X.25 module. |
| 3 | * |
| 4 | * Author: Nenad Corbic <ncorbic@sangoma.com> |
| 5 | * |
| 6 | * Copyright: (c) 1995-2001 Sangoma Technologies Inc. |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU General Public License |
| 10 | * as published by the Free Software Foundation; either version |
| 11 | * 2 of the License, or (at your option) any later version. |
| 12 | * ============================================================================ |
| 13 | * Apr 03, 2001 Nenad Corbic o Fixed the rx_skb=NULL bug in x25 in rx_intr(). |
| 14 | * Dec 26, 2000 Nenad Corbic o Added a new polling routine, that uses |
| 15 | * a kernel timer (more efficient). |
| 16 | * Dec 25, 2000 Nenad Corbic o Updated for 2.4.X kernel |
| 17 | * Jul 26, 2000 Nenad Corbic o Increased the local packet buffering |
| 18 | * for API to 4096+header_size. |
| 19 | * Jul 17, 2000 Nenad Corbic o Fixed the x25 startup bug. Enable |
| 20 | * communications only after all interfaces |
| 21 | * come up. HIGH SVC/PVC is used to calculate |
| 22 | * the number of channels. |
| 23 | * Enable protocol only after all interfaces |
| 24 | * are enabled. |
| 25 | * Jul 10, 2000 Nenad Corbic o Fixed the M_BIT bug. |
| 26 | * Apr 25, 2000 Nenad Corbic o Pass Modem messages to the API. |
| 27 | * Disable idle timeout in X25 API. |
| 28 | * Apr 14, 2000 Nenad Corbic o Fixed: Large LCN number support. |
| 29 | * Maximum LCN number is 4095. |
| 30 | * Maximum number of X25 channels is 255. |
| 31 | * Apr 06, 2000 Nenad Corbic o Added SMP Support. |
| 32 | * Mar 29, 2000 Nenad Corbic o Added support for S514 PCI Card |
| 33 | * Mar 23, 2000 Nenad Corbic o Improved task queue, BH handling. |
| 34 | * Mar 14, 2000 Nenad Corbic o Updated Protocol Violation handling |
| 35 | * routines. Bug Fix. |
| 36 | * Mar 10, 2000 Nenad Corbic o Bug Fix: corrupted mbox recovery. |
| 37 | * Mar 09, 2000 Nenad Corbic o Fixed the auto HDLC bug. |
| 38 | * Mar 08, 2000 Nenad Corbic o Fixed LAPB HDLC startup problems. |
| 39 | * Application must bring the link up |
| 40 | * before tx/rx, and bring the |
| 41 | * link down on close(). |
| 42 | * Mar 06, 2000 Nenad Corbic o Added an option for logging call setup |
| 43 | * information. |
| 44 | * Feb 29, 2000 Nenad Corbic o Added support for LAPB HDLC API |
| 45 | * Feb 25, 2000 Nenad Corbic o Fixed the modem failure handling. |
| 46 | * No Modem OOB message will be passed |
| 47 | * to the user. |
| 48 | * Feb 21, 2000 Nenad Corbic o Added Xpipemon Debug Support |
| 49 | * Dec 30, 1999 Nenad Corbic o Socket based X25API |
| 50 | * Sep 17, 1998 Jaspreet Singh o Updates for 2.2.X kernel |
| 51 | * Mar 15, 1998 Alan Cox o 2.1.x porting |
| 52 | * Dec 19, 1997 Jaspreet Singh o Added multi-channel IPX support |
| 53 | * Nov 27, 1997 Jaspreet Singh o Added protection against enabling of irqs |
| 54 | * when they are disabled. |
| 55 | * Nov 17, 1997 Farhan Thawar o Added IPX support |
| 56 | * o Changed if_send() to now buffer packets when |
| 57 | * the board is busy |
| 58 | * o Removed queueing of packets via the polling |
| 59 | * routing |
| 60 | * o Changed if_send() critical flags to properly |
| 61 | * handle race conditions |
| 62 | * Nov 06, 1997 Farhan Thawar o Added support for SVC timeouts |
| 63 | * o Changed PVC encapsulation to ETH_P_IP |
| 64 | * Jul 21, 1997 Jaspreet Singh o Fixed freeing up of buffers using kfree() |
| 65 | * when packets are received. |
| 66 | * Mar 11, 1997 Farhan Thawar Version 3.1.1 |
| 67 | * o added support for V35 |
| 68 | * o changed if_send() to return 0 if |
| 69 | * wandev.critical() is true |
| 70 | * o free socket buffer in if_send() if |
| 71 | * returning 0 |
| 72 | * o added support for single '@' address to |
| 73 | * accept all incoming calls |
| 74 | * o fixed bug in set_chan_state() to disconnect |
| 75 | * Jan 15, 1997 Gene Kozin Version 3.1.0 |
| 76 | * o implemented exec() entry point |
| 77 | * Jan 07, 1997 Gene Kozin Initial version. |
| 78 | *****************************************************************************/ |
| 79 | |
| 80 | /*====================================================== |
| 81 | * Includes |
| 82 | *=====================================================*/ |
| 83 | |
| 84 | #include <linux/module.h> |
| 85 | #include <linux/kernel.h> /* printk(), and other useful stuff */ |
| 86 | #include <linux/stddef.h> /* offsetof(), etc. */ |
| 87 | #include <linux/errno.h> /* return codes */ |
| 88 | #include <linux/string.h> /* inline memset(), etc. */ |
| 89 | #include <linux/ctype.h> |
| 90 | #include <linux/slab.h> /* kmalloc(), kfree() */ |
| 91 | #include <linux/wanrouter.h> /* WAN router definitions */ |
| 92 | #include <linux/wanpipe.h> /* WANPIPE common user API definitions */ |
| 93 | #include <linux/workqueue.h> |
Marcelo Feitoza Parisi | a817834 | 2005-07-15 09:59:26 -0700 | [diff] [blame] | 94 | #include <linux/jiffies.h> /* time_after() macro */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | #include <asm/byteorder.h> /* htons(), etc. */ |
| 96 | #include <asm/atomic.h> |
| 97 | #include <linux/delay.h> /* Experimental delay */ |
| 98 | |
| 99 | #include <asm/uaccess.h> |
| 100 | |
| 101 | #include <linux/if.h> |
| 102 | #include <linux/if_arp.h> |
| 103 | #include <linux/sdla_x25.h> /* X.25 firmware API definitions */ |
| 104 | #include <linux/if_wanpipe_common.h> |
| 105 | #include <linux/if_wanpipe.h> |
| 106 | |
| 107 | |
| 108 | /*====================================================== |
| 109 | * Defines & Macros |
| 110 | *=====================================================*/ |
| 111 | |
| 112 | |
| 113 | #define CMD_OK 0 /* normal firmware return code */ |
| 114 | #define CMD_TIMEOUT 0xFF /* firmware command timed out */ |
| 115 | #define MAX_CMD_RETRY 10 /* max number of firmware retries */ |
| 116 | |
| 117 | #define X25_CHAN_MTU 4096 /* unfragmented logical channel MTU */ |
| 118 | #define X25_HRDHDR_SZ 7 /* max encapsulation header size */ |
| 119 | #define X25_CONCT_TMOUT (90*HZ) /* link connection timeout */ |
| 120 | #define X25_RECON_TMOUT (10*HZ) /* link connection timeout */ |
| 121 | #define CONNECT_TIMEOUT (90*HZ) /* link connection timeout */ |
| 122 | #define HOLD_DOWN_TIME (30*HZ) /* link hold down time */ |
| 123 | #define MAX_BH_BUFF 10 |
| 124 | #define M_BIT 0x01 |
| 125 | |
| 126 | //#define PRINT_DEBUG 1 |
| 127 | #ifdef PRINT_DEBUG |
| 128 | #define DBG_PRINTK(format, a...) printk(format, ## a) |
| 129 | #else |
| 130 | #define DBG_PRINTK(format, a...) |
| 131 | #endif |
| 132 | |
| 133 | #define TMR_INT_ENABLED_POLL_ACTIVE 0x01 |
| 134 | #define TMR_INT_ENABLED_POLL_CONNECT_ON 0x02 |
| 135 | #define TMR_INT_ENABLED_POLL_CONNECT_OFF 0x04 |
| 136 | #define TMR_INT_ENABLED_POLL_DISCONNECT 0x08 |
| 137 | #define TMR_INT_ENABLED_CMD_EXEC 0x10 |
| 138 | #define TMR_INT_ENABLED_UPDATE 0x20 |
| 139 | #define TMR_INT_ENABLED_UDP_PKT 0x40 |
| 140 | |
| 141 | #define MAX_X25_ADDR_SIZE 16 |
| 142 | #define MAX_X25_DATA_SIZE 129 |
| 143 | #define MAX_X25_FACL_SIZE 110 |
| 144 | |
| 145 | #define TRY_CMD_AGAIN 2 |
| 146 | #define DELAY_RESULT 1 |
| 147 | #define RETURN_RESULT 0 |
| 148 | |
| 149 | #define DCD(x) (x & 0x03 ? "HIGH" : "LOW") |
| 150 | #define CTS(x) (x & 0x05 ? "HIGH" : "LOW") |
| 151 | |
| 152 | |
| 153 | /* Driver will not write log messages about |
| 154 | * modem status if defined.*/ |
| 155 | #define MODEM_NOT_LOG 1 |
| 156 | |
| 157 | /*==================================================== |
| 158 | * For IPXWAN |
| 159 | *===================================================*/ |
| 160 | |
| 161 | #define CVHexToAscii(b) (((unsigned char)(b) > (unsigned char)9) ? ((unsigned char)'A' + ((unsigned char)(b) - (unsigned char)10)) : ((unsigned char)'0' + (unsigned char)(b))) |
| 162 | |
| 163 | |
| 164 | /*==================================================== |
| 165 | * MEMORY DEBUGGING FUNCTION |
| 166 | *==================================================== |
| 167 | |
| 168 | #define KMEM_SAFETYZONE 8 |
| 169 | |
| 170 | static void * dbg_kmalloc(unsigned int size, int prio, int line) { |
| 171 | int i = 0; |
| 172 | void * v = kmalloc(size+sizeof(unsigned int)+2*KMEM_SAFETYZONE*8,prio); |
| 173 | char * c1 = v; |
| 174 | c1 += sizeof(unsigned int); |
| 175 | *((unsigned int *)v) = size; |
| 176 | |
| 177 | for (i = 0; i < KMEM_SAFETYZONE; i++) { |
| 178 | c1[0] = 'D'; c1[1] = 'E'; c1[2] = 'A'; c1[3] = 'D'; |
| 179 | c1[4] = 'B'; c1[5] = 'E'; c1[6] = 'E'; c1[7] = 'F'; |
| 180 | c1 += 8; |
| 181 | } |
| 182 | c1 += size; |
| 183 | for (i = 0; i < KMEM_SAFETYZONE; i++) { |
| 184 | c1[0] = 'M'; c1[1] = 'U'; c1[2] = 'N'; c1[3] = 'G'; |
| 185 | c1[4] = 'W'; c1[5] = 'A'; c1[6] = 'L'; c1[7] = 'L'; |
| 186 | c1 += 8; |
| 187 | } |
| 188 | v = ((char *)v) + sizeof(unsigned int) + KMEM_SAFETYZONE*8; |
| 189 | printk(KERN_INFO "line %d kmalloc(%d,%d) = %p\n",line,size,prio,v); |
| 190 | return v; |
| 191 | } |
| 192 | static void dbg_kfree(void * v, int line) { |
| 193 | unsigned int * sp = (unsigned int *)(((char *)v) - (sizeof(unsigned int) + KMEM_SAFETYZONE*8)); |
| 194 | unsigned int size = *sp; |
| 195 | char * c1 = ((char *)v) - KMEM_SAFETYZONE*8; |
| 196 | int i = 0; |
| 197 | for (i = 0; i < KMEM_SAFETYZONE; i++) { |
| 198 | if ( c1[0] != 'D' || c1[1] != 'E' || c1[2] != 'A' || c1[3] != 'D' |
| 199 | || c1[4] != 'B' || c1[5] != 'E' || c1[6] != 'E' || c1[7] != 'F') { |
| 200 | printk(KERN_INFO "kmalloced block at %p has been corrupted (underrun)!\n",v); |
| 201 | printk(KERN_INFO " %4x: %2x %2x %2x %2x %2x %2x %2x %2x\n", i*8, |
| 202 | c1[0],c1[1],c1[2],c1[3],c1[4],c1[5],c1[6],c1[7] ); |
| 203 | } |
| 204 | c1 += 8; |
| 205 | } |
| 206 | c1 += size; |
| 207 | for (i = 0; i < KMEM_SAFETYZONE; i++) { |
| 208 | if ( c1[0] != 'M' || c1[1] != 'U' || c1[2] != 'N' || c1[3] != 'G' |
| 209 | || c1[4] != 'W' || c1[5] != 'A' || c1[6] != 'L' || c1[7] != 'L' |
| 210 | ) { |
| 211 | printk(KERN_INFO "kmalloced block at %p has been corrupted (overrun):\n",v); |
| 212 | printk(KERN_INFO " %4x: %2x %2x %2x %2x %2x %2x %2x %2x\n", i*8, |
| 213 | c1[0],c1[1],c1[2],c1[3],c1[4],c1[5],c1[6],c1[7] ); |
| 214 | } |
| 215 | c1 += 8; |
| 216 | } |
| 217 | printk(KERN_INFO "line %d kfree(%p)\n",line,v); |
| 218 | v = ((char *)v) - (sizeof(unsigned int) + KMEM_SAFETYZONE*8); |
| 219 | kfree(v); |
| 220 | } |
| 221 | |
| 222 | #define kmalloc(x,y) dbg_kmalloc(x,y,__LINE__) |
| 223 | #define kfree(x) dbg_kfree(x,__LINE__) |
| 224 | |
| 225 | ==============================================================*/ |
| 226 | |
| 227 | |
| 228 | |
| 229 | /*=============================================== |
| 230 | * Data Structures |
| 231 | *===============================================*/ |
| 232 | |
| 233 | |
| 234 | /*======================================================== |
| 235 | * Name: x25_channel |
| 236 | * |
| 237 | * Purpose: To hold private informaton for each |
| 238 | * logical channel. |
| 239 | * |
| 240 | * Rationale: Per-channel debugging is possible if each |
| 241 | * channel has its own private area. |
| 242 | * |
| 243 | * Assumptions: |
| 244 | * |
| 245 | * Description: This is an extention of the struct net_device |
| 246 | * we create for each network interface to keep |
| 247 | * the rest of X.25 channel-specific data. |
| 248 | * |
| 249 | * Construct: Typedef |
| 250 | */ |
| 251 | typedef struct x25_channel |
| 252 | { |
| 253 | wanpipe_common_t common; /* common area for x25api and socket */ |
| 254 | char name[WAN_IFNAME_SZ+1]; /* interface name, ASCIIZ */ |
| 255 | char addr[WAN_ADDRESS_SZ+1]; /* media address, ASCIIZ */ |
| 256 | unsigned tx_pkt_size; |
| 257 | unsigned short protocol; /* ethertype, 0 - multiplexed */ |
| 258 | char drop_sequence; /* mark sequence for dropping */ |
| 259 | unsigned long state_tick; /* time of the last state change */ |
| 260 | unsigned idle_timeout; /* sec, before disconnecting */ |
| 261 | unsigned long i_timeout_sofar; /* # of sec's we've been idle */ |
| 262 | unsigned hold_timeout; /* sec, before re-connecting */ |
| 263 | unsigned long tick_counter; /* counter for transmit time out */ |
| 264 | char devtint; /* Weather we should dev_tint() */ |
| 265 | struct sk_buff* rx_skb; /* receive socket buffer */ |
| 266 | struct sk_buff* tx_skb; /* transmit socket buffer */ |
| 267 | |
| 268 | bh_data_t *bh_head; /* Circular buffer for x25api_bh */ |
| 269 | unsigned long tq_working; |
| 270 | volatile int bh_write; |
| 271 | volatile int bh_read; |
| 272 | atomic_t bh_buff_used; |
| 273 | |
| 274 | sdla_t* card; /* -> owner */ |
| 275 | struct net_device *dev; /* -> bound devce */ |
| 276 | |
| 277 | int ch_idx; |
| 278 | unsigned char enable_IPX; |
| 279 | unsigned long network_number; |
| 280 | struct net_device_stats ifstats; /* interface statistics */ |
| 281 | unsigned short transmit_length; |
| 282 | unsigned short tx_offset; |
| 283 | char transmit_buffer[X25_CHAN_MTU+sizeof(x25api_hdr_t)]; |
| 284 | |
| 285 | if_send_stat_t if_send_stat; |
| 286 | rx_intr_stat_t rx_intr_stat; |
| 287 | pipe_mgmt_stat_t pipe_mgmt_stat; |
| 288 | |
| 289 | unsigned long router_start_time; /* Router start time in seconds */ |
| 290 | unsigned long router_up_time; |
| 291 | |
| 292 | } x25_channel_t; |
| 293 | |
| 294 | /* FIXME Take this out */ |
| 295 | |
| 296 | #ifdef NEX_OLD_CALL_INFO |
| 297 | typedef struct x25_call_info |
| 298 | { |
| 299 | char dest[17]; PACKED;/* ASCIIZ destination address */ |
| 300 | char src[17]; PACKED;/* ASCIIZ source address */ |
| 301 | char nuser; PACKED;/* number of user data bytes */ |
| 302 | unsigned char user[127]; PACKED;/* user data */ |
| 303 | char nfacil; PACKED;/* number of facilities */ |
| 304 | struct |
| 305 | { |
| 306 | unsigned char code; PACKED; |
| 307 | unsigned char parm; PACKED; |
| 308 | } facil[64]; /* facilities */ |
| 309 | } x25_call_info_t; |
| 310 | #else |
| 311 | typedef struct x25_call_info |
| 312 | { |
| 313 | char dest[MAX_X25_ADDR_SIZE] PACKED;/* ASCIIZ destination address */ |
| 314 | char src[MAX_X25_ADDR_SIZE] PACKED;/* ASCIIZ source address */ |
| 315 | unsigned char nuser PACKED; |
| 316 | unsigned char user[MAX_X25_DATA_SIZE] PACKED;/* user data */ |
| 317 | unsigned char nfacil PACKED; |
| 318 | unsigned char facil[MAX_X25_FACL_SIZE] PACKED; |
| 319 | unsigned short lcn PACKED; |
| 320 | } x25_call_info_t; |
| 321 | #endif |
| 322 | |
| 323 | |
| 324 | |
| 325 | /*=============================================== |
| 326 | * Private Function Prototypes |
| 327 | *==============================================*/ |
| 328 | |
| 329 | |
| 330 | /*================================================= |
| 331 | * WAN link driver entry points. These are |
| 332 | * called by the WAN router module. |
| 333 | */ |
| 334 | static int update(struct wan_device* wandev); |
| 335 | static int new_if(struct wan_device* wandev, struct net_device* dev, |
| 336 | wanif_conf_t* conf); |
| 337 | static int del_if(struct wan_device* wandev, struct net_device* dev); |
| 338 | static void disable_comm (sdla_t* card); |
| 339 | static void disable_comm_shutdown(sdla_t *card); |
| 340 | |
| 341 | |
| 342 | |
| 343 | /*================================================= |
| 344 | * WANPIPE-specific entry points |
| 345 | */ |
| 346 | static int wpx_exec (struct sdla* card, void* u_cmd, void* u_data); |
| 347 | static void x25api_bh(struct net_device *dev); |
| 348 | static int x25api_bh_cleanup(struct net_device *dev); |
| 349 | static int bh_enqueue(struct net_device *dev, struct sk_buff *skb); |
| 350 | |
| 351 | |
| 352 | /*================================================= |
| 353 | * Network device interface |
| 354 | */ |
| 355 | static int if_init(struct net_device* dev); |
| 356 | static int if_open(struct net_device* dev); |
| 357 | static int if_close(struct net_device* dev); |
| 358 | static int if_header(struct sk_buff* skb, struct net_device* dev, |
| 359 | unsigned short type, void* daddr, void* saddr, unsigned len); |
| 360 | static int if_rebuild_hdr (struct sk_buff* skb); |
| 361 | static int if_send(struct sk_buff* skb, struct net_device* dev); |
| 362 | static struct net_device_stats *if_stats(struct net_device* dev); |
| 363 | |
| 364 | static void if_tx_timeout(struct net_device *dev); |
| 365 | |
| 366 | /*================================================= |
| 367 | * Interrupt handlers |
| 368 | */ |
| 369 | static void wpx_isr (sdla_t *); |
| 370 | static void rx_intr (sdla_t *); |
| 371 | static void tx_intr (sdla_t *); |
| 372 | static void status_intr (sdla_t *); |
| 373 | static void event_intr (sdla_t *); |
| 374 | static void spur_intr (sdla_t *); |
| 375 | static void timer_intr (sdla_t *); |
| 376 | |
| 377 | static int tx_intr_send(sdla_t *card, struct net_device *dev); |
| 378 | static struct net_device *move_dev_to_next(sdla_t *card, |
| 379 | struct net_device *dev); |
| 380 | |
| 381 | /*================================================= |
| 382 | * Background polling routines |
| 383 | */ |
| 384 | static void wpx_poll (sdla_t* card); |
| 385 | static void poll_disconnected (sdla_t* card); |
| 386 | static void poll_connecting (sdla_t* card); |
| 387 | static void poll_active (sdla_t* card); |
| 388 | static void trigger_x25_poll(sdla_t *card); |
| 389 | static void x25_timer_routine(unsigned long data); |
| 390 | |
| 391 | |
| 392 | |
| 393 | /*================================================= |
| 394 | * X.25 firmware interface functions |
| 395 | */ |
| 396 | static int x25_get_version (sdla_t* card, char* str); |
| 397 | static int x25_configure (sdla_t* card, TX25Config* conf); |
| 398 | static int hdlc_configure (sdla_t* card, TX25Config* conf); |
| 399 | static int set_hdlc_level (sdla_t* card); |
| 400 | static int x25_get_err_stats (sdla_t* card); |
| 401 | static int x25_get_stats (sdla_t* card); |
| 402 | static int x25_set_intr_mode (sdla_t* card, int mode); |
| 403 | static int x25_close_hdlc (sdla_t* card); |
| 404 | static int x25_open_hdlc (sdla_t* card); |
| 405 | static int x25_setup_hdlc (sdla_t* card); |
| 406 | static int x25_set_dtr (sdla_t* card, int dtr); |
| 407 | static int x25_get_chan_conf (sdla_t* card, x25_channel_t* chan); |
| 408 | static int x25_place_call (sdla_t* card, x25_channel_t* chan); |
| 409 | static int x25_accept_call (sdla_t* card, int lcn, int qdm); |
| 410 | static int x25_clear_call (sdla_t* card, int lcn, int cause, int diagn); |
| 411 | static int x25_send (sdla_t* card, int lcn, int qdm, int len, void* buf); |
| 412 | static int x25_fetch_events (sdla_t* card); |
| 413 | static int x25_error (sdla_t* card, int err, int cmd, int lcn); |
| 414 | |
| 415 | /*================================================= |
| 416 | * X.25 asynchronous event handlers |
| 417 | */ |
| 418 | static int incoming_call (sdla_t* card, int cmd, int lcn, TX25Mbox* mb); |
| 419 | static int call_accepted (sdla_t* card, int cmd, int lcn, TX25Mbox* mb); |
| 420 | static int call_cleared (sdla_t* card, int cmd, int lcn, TX25Mbox* mb); |
| 421 | static int timeout_event (sdla_t* card, int cmd, int lcn, TX25Mbox* mb); |
| 422 | static int restart_event (sdla_t* card, int cmd, int lcn, TX25Mbox* mb); |
| 423 | |
| 424 | |
| 425 | /*================================================= |
| 426 | * Miscellaneous functions |
| 427 | */ |
| 428 | static int connect (sdla_t* card); |
| 429 | static int disconnect (sdla_t* card); |
| 430 | static struct net_device* get_dev_by_lcn(struct wan_device* wandev, |
| 431 | unsigned lcn); |
| 432 | static int chan_connect(struct net_device* dev); |
| 433 | static int chan_disc(struct net_device* dev); |
| 434 | static void set_chan_state(struct net_device* dev, int state); |
| 435 | static int chan_send(struct net_device *dev, void* buff, unsigned data_len, |
| 436 | unsigned char tx_intr); |
| 437 | static unsigned char bps_to_speed_code (unsigned long bps); |
| 438 | static unsigned int dec_to_uint (unsigned char* str, int len); |
| 439 | static unsigned int hex_to_uint (unsigned char*, int); |
| 440 | static void parse_call_info (unsigned char*, x25_call_info_t*); |
| 441 | static struct net_device *find_channel(sdla_t *card, unsigned lcn); |
| 442 | static void bind_lcn_to_dev(sdla_t *card, struct net_device *dev, unsigned lcn); |
| 443 | static void setup_for_delayed_transmit(struct net_device *dev, |
| 444 | void *buf, unsigned len); |
| 445 | |
| 446 | |
| 447 | /*================================================= |
| 448 | * X25 API Functions |
| 449 | */ |
| 450 | static int wanpipe_pull_data_in_skb(sdla_t *card, struct net_device *dev, |
| 451 | struct sk_buff **); |
| 452 | static void timer_intr_exec(sdla_t *, unsigned char); |
| 453 | static int execute_delayed_cmd(sdla_t *card, struct net_device *dev, |
| 454 | mbox_cmd_t *usr_cmd, char bad_cmd); |
| 455 | static int api_incoming_call (sdla_t*, TX25Mbox *, int); |
| 456 | static int alloc_and_init_skb_buf (sdla_t *,struct sk_buff **, int); |
| 457 | static void send_delayed_cmd_result(sdla_t *card, struct net_device *dev, |
| 458 | TX25Mbox* mbox); |
| 459 | static int clear_confirm_event (sdla_t *, TX25Mbox*); |
| 460 | static void send_oob_msg (sdla_t *card, struct net_device *dev, TX25Mbox *mbox); |
| 461 | static int timer_intr_cmd_exec(sdla_t *card); |
| 462 | static void api_oob_event (sdla_t *card,TX25Mbox *mbox); |
| 463 | static int check_bad_command(sdla_t *card, struct net_device *dev); |
| 464 | static int channel_disconnect(sdla_t* card, struct net_device *dev); |
| 465 | static void hdlc_link_down (sdla_t*); |
| 466 | |
| 467 | /*================================================= |
| 468 | * XPIPEMON Functions |
| 469 | */ |
| 470 | static int process_udp_mgmt_pkt(sdla_t *); |
| 471 | static int udp_pkt_type( struct sk_buff *, sdla_t*); |
| 472 | static int reply_udp( unsigned char *, unsigned int); |
| 473 | static void init_x25_channel_struct( x25_channel_t *); |
| 474 | static void init_global_statistics( sdla_t *); |
| 475 | static int store_udp_mgmt_pkt(int udp_type, char udp_pkt_src, sdla_t *card, |
| 476 | struct net_device *dev, |
| 477 | struct sk_buff *skb, int lcn); |
| 478 | static unsigned short calc_checksum (char *, int); |
| 479 | |
| 480 | |
| 481 | |
| 482 | /*================================================= |
| 483 | * IPX functions |
| 484 | */ |
| 485 | static void switch_net_numbers(unsigned char *, unsigned long, unsigned char); |
| 486 | static int handle_IPXWAN(unsigned char *, char *, unsigned char , |
| 487 | unsigned long , unsigned short ); |
| 488 | |
| 489 | extern void disable_irq(unsigned int); |
| 490 | extern void enable_irq(unsigned int); |
| 491 | |
| 492 | static void S508_S514_lock(sdla_t *, unsigned long *); |
| 493 | static void S508_S514_unlock(sdla_t *, unsigned long *); |
| 494 | |
| 495 | |
| 496 | /*================================================= |
| 497 | * Global Variables |
| 498 | *=================================================*/ |
| 499 | |
| 500 | |
| 501 | |
| 502 | /*================================================= |
| 503 | * Public Functions |
| 504 | *=================================================*/ |
| 505 | |
| 506 | |
| 507 | |
| 508 | |
| 509 | /*=================================================================== |
| 510 | * wpx_init: X.25 Protocol Initialization routine. |
| 511 | * |
| 512 | * Purpose: To initialize the protocol/firmware. |
| 513 | * |
| 514 | * Rationale: This function is called by setup() function, in |
| 515 | * sdlamain.c, to dynamically setup the x25 protocol. |
| 516 | * This is the first protocol specific function, which |
| 517 | * executes once on startup. |
| 518 | * |
| 519 | * Description: This procedure initializes the x25 firmware and |
| 520 | * sets up the mailbox, transmit and receive buffer |
| 521 | * pointers. It also initializes all debugging structures |
| 522 | * and sets up the X25 environment. |
| 523 | * |
| 524 | * Sets up hardware options defined by user in [wanpipe#] |
| 525 | * section of wanpipe#.conf configuration file. |
| 526 | * |
| 527 | * At this point adapter is completely initialized |
| 528 | * and X.25 firmware is running. |
| 529 | * o read firmware version (to make sure it's alive) |
| 530 | * o configure adapter |
| 531 | * o initialize protocol-specific fields of the |
| 532 | * adapter data space. |
| 533 | * |
| 534 | * Called by: setup() function in sdlamain.c |
| 535 | * |
| 536 | * Assumptions: None |
| 537 | * |
| 538 | * Warnings: None |
| 539 | * |
| 540 | * Return: 0 o.k. |
| 541 | * < 0 failure. |
| 542 | */ |
| 543 | |
| 544 | int wpx_init (sdla_t* card, wandev_conf_t* conf) |
| 545 | { |
| 546 | union{ |
| 547 | char str[80]; |
| 548 | TX25Config cfg; |
| 549 | } u; |
| 550 | |
| 551 | /* Verify configuration ID */ |
| 552 | if (conf->config_id != WANCONFIG_X25){ |
| 553 | printk(KERN_INFO "%s: invalid configuration ID %u!\n", |
| 554 | card->devname, conf->config_id) |
| 555 | ; |
| 556 | return -EINVAL; |
| 557 | } |
| 558 | |
| 559 | /* Initialize protocol-specific fields */ |
| 560 | card->mbox = (void*)(card->hw.dpmbase + X25_MBOX_OFFS); |
| 561 | card->rxmb = (void*)(card->hw.dpmbase + X25_RXMBOX_OFFS); |
| 562 | card->flags = (void*)(card->hw.dpmbase + X25_STATUS_OFFS); |
| 563 | |
| 564 | /* Initialize for S514 Card */ |
| 565 | if(card->hw.type == SDLA_S514) { |
| 566 | card->mbox += X25_MB_VECTOR; |
| 567 | card->flags += X25_MB_VECTOR; |
| 568 | card->rxmb += X25_MB_VECTOR; |
| 569 | } |
| 570 | |
| 571 | |
| 572 | /* Read firmware version. Note that when adapter initializes, it |
| 573 | * clears the mailbox, so it may appear that the first command was |
| 574 | * executed successfully when in fact it was merely erased. To work |
| 575 | * around this, we execute the first command twice. |
| 576 | */ |
| 577 | if (x25_get_version(card, NULL) || x25_get_version(card, u.str)) |
| 578 | return -EIO; |
| 579 | |
| 580 | |
| 581 | /* X25 firmware can run ether in X25 or LAPB HDLC mode. |
| 582 | * Check the user defined option and configure accordingly */ |
| 583 | if (conf->u.x25.LAPB_hdlc_only == WANOPT_YES){ |
| 584 | if (set_hdlc_level(card) != CMD_OK){ |
| 585 | return -EIO; |
| 586 | }else{ |
| 587 | printk(KERN_INFO "%s: running LAP_B HDLC firmware v%s\n", |
| 588 | card->devname, u.str); |
| 589 | } |
| 590 | card->u.x.LAPB_hdlc = 1; |
| 591 | }else{ |
| 592 | printk(KERN_INFO "%s: running X.25 firmware v%s\n", |
| 593 | card->devname, u.str); |
| 594 | card->u.x.LAPB_hdlc = 0; |
| 595 | } |
| 596 | |
| 597 | /* Configure adapter. Here we set resonable defaults, then parse |
| 598 | * device configuration structure and set configuration options. |
| 599 | * Most configuration options are verified and corrected (if |
| 600 | * necessary) since we can't rely on the adapter to do so. |
| 601 | */ |
| 602 | memset(&u.cfg, 0, sizeof(u.cfg)); |
| 603 | u.cfg.t1 = 3; |
| 604 | u.cfg.n2 = 10; |
| 605 | u.cfg.autoHdlc = 1; /* automatic HDLC connection */ |
| 606 | u.cfg.hdlcWindow = 7; |
| 607 | u.cfg.pktWindow = 2; |
| 608 | u.cfg.station = 1; /* DTE */ |
| 609 | u.cfg.options = 0x0090; /* disable D-bit pragmatics */ |
| 610 | u.cfg.ccittCompat = 1988; |
| 611 | u.cfg.t10t20 = 30; |
| 612 | u.cfg.t11t21 = 30; |
| 613 | u.cfg.t12t22 = 30; |
| 614 | u.cfg.t13t23 = 30; |
| 615 | u.cfg.t16t26 = 30; |
| 616 | u.cfg.t28 = 30; |
| 617 | u.cfg.r10r20 = 5; |
| 618 | u.cfg.r12r22 = 5; |
| 619 | u.cfg.r13r23 = 5; |
| 620 | u.cfg.responseOpt = 1; /* RR's after every packet */ |
| 621 | |
| 622 | if (card->u.x.LAPB_hdlc){ |
| 623 | u.cfg.hdlcMTU = 1027; |
| 624 | } |
| 625 | |
| 626 | if (conf->u.x25.x25_conf_opt){ |
| 627 | u.cfg.options = conf->u.x25.x25_conf_opt; |
| 628 | } |
| 629 | |
| 630 | if (conf->clocking != WANOPT_EXTERNAL) |
| 631 | u.cfg.baudRate = bps_to_speed_code(conf->bps); |
| 632 | |
| 633 | if (conf->station != WANOPT_DTE){ |
| 634 | u.cfg.station = 0; /* DCE mode */ |
| 635 | } |
| 636 | |
| 637 | if (conf->interface != WANOPT_RS232 ){ |
| 638 | u.cfg.hdlcOptions |= 0x80; /* V35 mode */ |
| 639 | } |
| 640 | |
| 641 | /* adjust MTU */ |
| 642 | if (!conf->mtu || (conf->mtu >= 1024)) |
| 643 | card->wandev.mtu = 1024; |
| 644 | else if (conf->mtu >= 512) |
| 645 | card->wandev.mtu = 512; |
| 646 | else if (conf->mtu >= 256) |
| 647 | card->wandev.mtu = 256; |
| 648 | else if (conf->mtu >= 128) |
| 649 | card->wandev.mtu = 128; |
| 650 | else |
| 651 | card->wandev.mtu = 64; |
| 652 | |
| 653 | u.cfg.defPktSize = u.cfg.pktMTU = card->wandev.mtu; |
| 654 | |
| 655 | if (conf->u.x25.hi_pvc){ |
| 656 | card->u.x.hi_pvc = min_t(unsigned int, conf->u.x25.hi_pvc, MAX_LCN_NUM); |
| 657 | card->u.x.lo_pvc = min_t(unsigned int, conf->u.x25.lo_pvc, card->u.x.hi_pvc); |
| 658 | } |
| 659 | |
| 660 | if (conf->u.x25.hi_svc){ |
| 661 | card->u.x.hi_svc = min_t(unsigned int, conf->u.x25.hi_svc, MAX_LCN_NUM); |
| 662 | card->u.x.lo_svc = min_t(unsigned int, conf->u.x25.lo_svc, card->u.x.hi_svc); |
| 663 | } |
| 664 | |
| 665 | /* Figure out the total number of channels to configure */ |
| 666 | card->u.x.num_of_ch = 0; |
| 667 | if (card->u.x.hi_svc != 0){ |
| 668 | card->u.x.num_of_ch = (card->u.x.hi_svc - card->u.x.lo_svc) + 1; |
| 669 | } |
| 670 | if (card->u.x.hi_pvc != 0){ |
| 671 | card->u.x.num_of_ch += (card->u.x.hi_pvc - card->u.x.lo_pvc) + 1; |
| 672 | } |
| 673 | |
| 674 | if (card->u.x.num_of_ch == 0){ |
| 675 | printk(KERN_INFO "%s: ERROR, Minimum number of PVC/SVC channels is 1 !\n" |
| 676 | "%s: Please set the Lowest/Highest PVC/SVC values !\n", |
| 677 | card->devname,card->devname); |
| 678 | return -ECHRNG; |
| 679 | } |
| 680 | |
| 681 | u.cfg.loPVC = card->u.x.lo_pvc; |
| 682 | u.cfg.hiPVC = card->u.x.hi_pvc; |
| 683 | u.cfg.loTwoWaySVC = card->u.x.lo_svc; |
| 684 | u.cfg.hiTwoWaySVC = card->u.x.hi_svc; |
| 685 | |
| 686 | if (conf->u.x25.hdlc_window) |
| 687 | u.cfg.hdlcWindow = min_t(unsigned int, conf->u.x25.hdlc_window, 7); |
| 688 | if (conf->u.x25.pkt_window) |
| 689 | u.cfg.pktWindow = min_t(unsigned int, conf->u.x25.pkt_window, 7); |
| 690 | |
| 691 | if (conf->u.x25.t1) |
| 692 | u.cfg.t1 = min_t(unsigned int, conf->u.x25.t1, 30); |
| 693 | if (conf->u.x25.t2) |
| 694 | u.cfg.t2 = min_t(unsigned int, conf->u.x25.t2, 29); |
| 695 | if (conf->u.x25.t4) |
| 696 | u.cfg.t4 = min_t(unsigned int, conf->u.x25.t4, 240); |
| 697 | if (conf->u.x25.n2) |
| 698 | u.cfg.n2 = min_t(unsigned int, conf->u.x25.n2, 30); |
| 699 | |
| 700 | if (conf->u.x25.t10_t20) |
| 701 | u.cfg.t10t20 = min_t(unsigned int, conf->u.x25.t10_t20,255); |
| 702 | if (conf->u.x25.t11_t21) |
| 703 | u.cfg.t11t21 = min_t(unsigned int, conf->u.x25.t11_t21,255); |
| 704 | if (conf->u.x25.t12_t22) |
| 705 | u.cfg.t12t22 = min_t(unsigned int, conf->u.x25.t12_t22,255); |
| 706 | if (conf->u.x25.t13_t23) |
| 707 | u.cfg.t13t23 = min_t(unsigned int, conf->u.x25.t13_t23,255); |
| 708 | if (conf->u.x25.t16_t26) |
| 709 | u.cfg.t16t26 = min_t(unsigned int, conf->u.x25.t16_t26, 255); |
| 710 | if (conf->u.x25.t28) |
| 711 | u.cfg.t28 = min_t(unsigned int, conf->u.x25.t28, 255); |
| 712 | |
| 713 | if (conf->u.x25.r10_r20) |
| 714 | u.cfg.r10r20 = min_t(unsigned int, conf->u.x25.r10_r20,250); |
| 715 | if (conf->u.x25.r12_r22) |
| 716 | u.cfg.r12r22 = min_t(unsigned int, conf->u.x25.r12_r22,250); |
| 717 | if (conf->u.x25.r13_r23) |
| 718 | u.cfg.r13r23 = min_t(unsigned int, conf->u.x25.r13_r23,250); |
| 719 | |
| 720 | |
| 721 | if (conf->u.x25.ccitt_compat) |
| 722 | u.cfg.ccittCompat = conf->u.x25.ccitt_compat; |
| 723 | |
| 724 | /* initialize adapter */ |
| 725 | if (card->u.x.LAPB_hdlc){ |
| 726 | if (hdlc_configure(card, &u.cfg) != CMD_OK) |
| 727 | return -EIO; |
| 728 | }else{ |
| 729 | if (x25_configure(card, &u.cfg) != CMD_OK) |
| 730 | return -EIO; |
| 731 | } |
| 732 | |
| 733 | if ((x25_close_hdlc(card) != CMD_OK) || /* close HDLC link */ |
| 734 | (x25_set_dtr(card, 0) != CMD_OK)) /* drop DTR */ |
| 735 | return -EIO; |
| 736 | |
| 737 | /* Initialize protocol-specific fields of adapter data space */ |
| 738 | card->wandev.bps = conf->bps; |
| 739 | card->wandev.interface = conf->interface; |
| 740 | card->wandev.clocking = conf->clocking; |
| 741 | card->wandev.station = conf->station; |
| 742 | card->isr = &wpx_isr; |
| 743 | card->poll = NULL; //&wpx_poll; |
| 744 | card->disable_comm = &disable_comm; |
| 745 | card->exec = &wpx_exec; |
| 746 | card->wandev.update = &update; |
| 747 | card->wandev.new_if = &new_if; |
| 748 | card->wandev.del_if = &del_if; |
| 749 | |
| 750 | /* WARNING: This function cannot exit with an error |
| 751 | * after the change of state */ |
| 752 | card->wandev.state = WAN_DISCONNECTED; |
| 753 | |
| 754 | card->wandev.enable_tx_int = 0; |
| 755 | card->irq_dis_if_send_count = 0; |
| 756 | card->irq_dis_poll_count = 0; |
| 757 | card->u.x.tx_dev = NULL; |
| 758 | card->u.x.no_dev = 0; |
| 759 | |
| 760 | |
| 761 | /* Configure for S514 PCI Card */ |
| 762 | if (card->hw.type == SDLA_S514) { |
| 763 | card->u.x.hdlc_buf_status = |
| 764 | (volatile unsigned char *) |
| 765 | (card->hw.dpmbase + X25_MB_VECTOR+ X25_MISC_HDLC_BITS); |
| 766 | }else{ |
| 767 | card->u.x.hdlc_buf_status = |
| 768 | (volatile unsigned char *)(card->hw.dpmbase + X25_MISC_HDLC_BITS); |
| 769 | } |
| 770 | |
| 771 | card->u.x.poll_device=NULL; |
| 772 | card->wandev.udp_port = conf->udp_port; |
| 773 | |
| 774 | /* Enable or disable call setup logging */ |
| 775 | if (conf->u.x25.logging == WANOPT_YES){ |
| 776 | printk(KERN_INFO "%s: Enabling Call Logging.\n", |
| 777 | card->devname); |
| 778 | card->u.x.logging = 1; |
| 779 | }else{ |
| 780 | card->u.x.logging = 0; |
| 781 | } |
| 782 | |
| 783 | /* Enable or disable modem status reporting */ |
| 784 | if (conf->u.x25.oob_on_modem == WANOPT_YES){ |
| 785 | printk(KERN_INFO "%s: Enabling OOB on Modem change.\n", |
| 786 | card->devname); |
| 787 | card->u.x.oob_on_modem = 1; |
| 788 | }else{ |
| 789 | card->u.x.oob_on_modem = 0; |
| 790 | } |
| 791 | |
| 792 | init_global_statistics(card); |
| 793 | |
| 794 | INIT_WORK(&card->u.x.x25_poll_work, (void *)wpx_poll, card); |
| 795 | |
| 796 | init_timer(&card->u.x.x25_timer); |
| 797 | card->u.x.x25_timer.data = (unsigned long)card; |
| 798 | card->u.x.x25_timer.function = x25_timer_routine; |
| 799 | |
| 800 | return 0; |
| 801 | } |
| 802 | |
| 803 | /*========================================================= |
| 804 | * WAN Device Driver Entry Points |
| 805 | *========================================================*/ |
| 806 | |
| 807 | /*============================================================ |
| 808 | * Name: update(), Update device status & statistics. |
| 809 | * |
| 810 | * Purpose: To provide debugging and statitical |
| 811 | * information to the /proc file system. |
| 812 | * /proc/net/wanrouter/wanpipe# |
| 813 | * |
| 814 | * Rationale: The /proc file system is used to collect |
| 815 | * information about the kernel and drivers. |
| 816 | * Using the /proc file system the user |
| 817 | * can see exactly what the sangoma drivers are |
| 818 | * doing. And in what state they are in. |
| 819 | * |
| 820 | * Description: Collect all driver statistical information |
| 821 | * and pass it to the top laywer. |
| 822 | * |
| 823 | * Since we have to execute a debugging command, |
| 824 | * to obtain firmware statitics, we trigger a |
| 825 | * UPDATE function within the timer interrtup. |
| 826 | * We wait until the timer update is complete. |
| 827 | * Once complete return the appropriate return |
| 828 | * code to indicate that the update was successful. |
| 829 | * |
| 830 | * Called by: device_stat() in wanmain.c |
| 831 | * |
| 832 | * Assumptions: |
| 833 | * |
| 834 | * Warnings: This function will degrade the performance |
| 835 | * of the router, since it uses the mailbox. |
| 836 | * |
| 837 | * Return: 0 OK |
| 838 | * <0 Failed (or busy). |
| 839 | */ |
| 840 | |
| 841 | static int update(struct wan_device* wandev) |
| 842 | { |
| 843 | volatile sdla_t* card; |
| 844 | TX25Status* status; |
| 845 | unsigned long timeout; |
| 846 | |
| 847 | /* sanity checks */ |
| 848 | if ((wandev == NULL) || (wandev->private == NULL)) |
| 849 | return -EFAULT; |
| 850 | |
| 851 | if (wandev->state == WAN_UNCONFIGURED) |
| 852 | return -ENODEV; |
| 853 | |
| 854 | if (test_bit(SEND_CRIT, (void*)&wandev->critical)) |
| 855 | return -EAGAIN; |
| 856 | |
| 857 | if (!wandev->dev) |
| 858 | return -ENODEV; |
| 859 | |
| 860 | card = wandev->private; |
| 861 | status = card->flags; |
| 862 | |
| 863 | card->u.x.timer_int_enabled |= TMR_INT_ENABLED_UPDATE; |
| 864 | status->imask |= INTR_ON_TIMER; |
| 865 | timeout = jiffies; |
| 866 | |
| 867 | for (;;){ |
| 868 | if (!(card->u.x.timer_int_enabled & TMR_INT_ENABLED_UPDATE)){ |
| 869 | break; |
| 870 | } |
Marcelo Feitoza Parisi | a817834 | 2005-07-15 09:59:26 -0700 | [diff] [blame] | 871 | if (time_after(jiffies, timeout + 1*HZ)){ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | card->u.x.timer_int_enabled &= ~TMR_INT_ENABLED_UPDATE; |
| 873 | return -EAGAIN; |
| 874 | } |
| 875 | } |
| 876 | return 0; |
| 877 | } |
| 878 | |
| 879 | |
| 880 | /*=================================================================== |
| 881 | * Name: new_if |
| 882 | * |
| 883 | * Purpose: To allocate and initialize resources for a |
| 884 | * new logical channel. |
| 885 | * |
| 886 | * Rationale: A new channel can be added dynamically via |
| 887 | * ioctl call. |
| 888 | * |
| 889 | * Description: Allocate a private channel structure, x25_channel_t. |
| 890 | * Parse the user interface options from wanpipe#.conf |
| 891 | * configuration file. |
| 892 | * Bind the private are into the network device private |
| 893 | * area pointer (dev->priv). |
| 894 | * Prepare the network device structure for registration. |
| 895 | * |
| 896 | * Called by: ROUTER_IFNEW Ioctl call, from wanrouter_ioctl() |
| 897 | * (wanmain.c) |
| 898 | * |
| 899 | * Assumptions: None |
| 900 | * |
| 901 | * Warnings: None |
| 902 | * |
| 903 | * Return: 0 Ok |
| 904 | * <0 Failed (channel will not be created) |
| 905 | */ |
| 906 | static int new_if(struct wan_device* wandev, struct net_device* dev, |
| 907 | wanif_conf_t* conf) |
| 908 | { |
| 909 | sdla_t* card = wandev->private; |
| 910 | x25_channel_t* chan; |
| 911 | int err = 0; |
| 912 | |
| 913 | if ((conf->name[0] == '\0') || (strlen(conf->name) > WAN_IFNAME_SZ)){ |
| 914 | printk(KERN_INFO "%s: invalid interface name!\n", |
| 915 | card->devname); |
| 916 | return -EINVAL; |
| 917 | } |
| 918 | |
| 919 | if(card->wandev.new_if_cnt++ > 0 && card->u.x.LAPB_hdlc) { |
| 920 | printk(KERN_INFO "%s: Error: Running LAPB HDLC Mode !\n", |
| 921 | card->devname); |
| 922 | printk(KERN_INFO |
| 923 | "%s: Maximum number of network interfaces must be one !\n", |
| 924 | card->devname); |
| 925 | return -EEXIST; |
| 926 | } |
| 927 | |
| 928 | /* allocate and initialize private data */ |
| 929 | chan = kmalloc(sizeof(x25_channel_t), GFP_ATOMIC); |
| 930 | if (chan == NULL){ |
| 931 | return -ENOMEM; |
| 932 | } |
| 933 | |
| 934 | memset(chan, 0, sizeof(x25_channel_t)); |
| 935 | |
| 936 | /* Bug Fix: Seg Err on PVC startup |
| 937 | * It must be here since bind_lcn_to_dev expects |
| 938 | * it bellow */ |
| 939 | dev->priv = chan; |
| 940 | |
| 941 | strcpy(chan->name, conf->name); |
| 942 | chan->card = card; |
| 943 | chan->dev = dev; |
| 944 | chan->common.sk = NULL; |
| 945 | chan->common.func = NULL; |
| 946 | chan->common.rw_bind = 0; |
| 947 | chan->tx_skb = chan->rx_skb = NULL; |
| 948 | |
| 949 | /* verify media address */ |
| 950 | if (conf->addr[0] == '@'){ /* SVC */ |
| 951 | chan->common.svc = 1; |
| 952 | strncpy(chan->addr, &conf->addr[1], WAN_ADDRESS_SZ); |
| 953 | |
| 954 | /* Set channel timeouts (default if not specified) */ |
| 955 | chan->idle_timeout = (conf->idle_timeout) ? |
| 956 | conf->idle_timeout : 90; |
| 957 | chan->hold_timeout = (conf->hold_timeout) ? |
| 958 | conf->hold_timeout : 10; |
| 959 | |
Tobias Klauser | 8e18d1f | 2005-09-10 14:45:00 -0700 | [diff] [blame] | 960 | }else if (isdigit(conf->addr[0])){ /* PVC */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | int lcn = dec_to_uint(conf->addr, 0); |
| 962 | |
| 963 | if ((lcn >= card->u.x.lo_pvc) && (lcn <= card->u.x.hi_pvc)){ |
| 964 | bind_lcn_to_dev (card, dev, lcn); |
| 965 | }else{ |
| 966 | printk(KERN_ERR |
| 967 | "%s: PVC %u is out of range on interface %s!\n", |
| 968 | wandev->name, lcn, chan->name); |
| 969 | err = -EINVAL; |
| 970 | } |
| 971 | }else{ |
| 972 | printk(KERN_ERR |
| 973 | "%s: invalid media address on interface %s!\n", |
| 974 | wandev->name, chan->name); |
| 975 | err = -EINVAL; |
| 976 | } |
| 977 | |
| 978 | if(strcmp(conf->usedby, "WANPIPE") == 0){ |
| 979 | printk(KERN_INFO "%s: Running in WANPIPE mode %s\n", |
| 980 | wandev->name, chan->name); |
| 981 | chan->common.usedby = WANPIPE; |
| 982 | chan->protocol = htons(ETH_P_IP); |
| 983 | |
| 984 | }else if(strcmp(conf->usedby, "API") == 0){ |
| 985 | chan->common.usedby = API; |
| 986 | printk(KERN_INFO "%s: Running in API mode %s\n", |
| 987 | wandev->name, chan->name); |
| 988 | chan->protocol = htons(X25_PROT); |
| 989 | } |
| 990 | |
| 991 | |
| 992 | if (err){ |
| 993 | kfree(chan); |
| 994 | dev->priv = NULL; |
| 995 | return err; |
| 996 | } |
| 997 | |
| 998 | chan->enable_IPX = conf->enable_IPX; |
| 999 | |
| 1000 | if (chan->enable_IPX) |
| 1001 | chan->protocol = htons(ETH_P_IPX); |
| 1002 | |
| 1003 | if (conf->network_number) |
| 1004 | chan->network_number = conf->network_number; |
| 1005 | else |
| 1006 | chan->network_number = 0xDEADBEEF; |
| 1007 | |
| 1008 | /* prepare network device data space for registration */ |
| 1009 | strcpy(dev->name,chan->name); |
| 1010 | |
| 1011 | dev->init = &if_init; |
| 1012 | |
| 1013 | init_x25_channel_struct(chan); |
| 1014 | |
| 1015 | return 0; |
| 1016 | } |
| 1017 | |
| 1018 | /*=================================================================== |
| 1019 | * Name: del_if(), Remove a logical channel. |
| 1020 | * |
| 1021 | * Purpose: To dynamically remove a logical channel. |
| 1022 | * |
| 1023 | * Rationale: Each logical channel should be dynamically |
| 1024 | * removable. This functin is called by an |
| 1025 | * IOCTL_IFDEL ioctl call or shutdown(). |
| 1026 | * |
| 1027 | * Description: Do nothing. |
| 1028 | * |
| 1029 | * Called by: IOCTL_IFDEL : wanrouter_ioctl() from wanmain.c |
| 1030 | * shutdown() from sdlamain.c |
| 1031 | * |
| 1032 | * Assumptions: |
| 1033 | * |
| 1034 | * Warnings: |
| 1035 | * |
| 1036 | * Return: 0 Ok. Void function. |
| 1037 | */ |
| 1038 | |
| 1039 | //FIXME Del IF Should be taken out now. |
| 1040 | |
| 1041 | static int del_if(struct wan_device* wandev, struct net_device* dev) |
| 1042 | { |
| 1043 | return 0; |
| 1044 | } |
| 1045 | |
| 1046 | |
| 1047 | /*============================================================ |
| 1048 | * Name: wpx_exec |
| 1049 | * |
| 1050 | * Description: Execute adapter interface command. |
| 1051 | * This option is currently dissabled. |
| 1052 | *===========================================================*/ |
| 1053 | |
| 1054 | static int wpx_exec (struct sdla* card, void* u_cmd, void* u_data) |
| 1055 | { |
| 1056 | return 0; |
| 1057 | } |
| 1058 | |
| 1059 | /*============================================================ |
| 1060 | * Name: disable_comm |
| 1061 | * |
| 1062 | * Description: Disable communications during shutdown. |
| 1063 | * Dont check return code because there is |
| 1064 | * nothing we can do about it. |
| 1065 | * |
| 1066 | * Warning: Dev and private areas are gone at this point. |
| 1067 | *===========================================================*/ |
| 1068 | |
| 1069 | static void disable_comm(sdla_t* card) |
| 1070 | { |
| 1071 | disable_comm_shutdown(card); |
| 1072 | del_timer(&card->u.x.x25_timer); |
| 1073 | return; |
| 1074 | } |
| 1075 | |
| 1076 | |
| 1077 | /*============================================================ |
| 1078 | * Network Device Interface |
| 1079 | *===========================================================*/ |
| 1080 | |
| 1081 | /*=================================================================== |
| 1082 | * Name: if_init(), Netowrk Interface Initialization |
| 1083 | * |
| 1084 | * Purpose: To initialize a network interface device structure. |
| 1085 | * |
| 1086 | * Rationale: During network interface startup, the if_init |
| 1087 | * is called by the kernel to initialize the |
| 1088 | * netowrk device structure. Thus a driver |
| 1089 | * can customze a network device. |
| 1090 | * |
| 1091 | * Description: Initialize the netowrk device call back |
| 1092 | * routines. This is where we tell the kernel |
| 1093 | * which function to use when it wants to send |
| 1094 | * via our interface. |
| 1095 | * Furthermore, we initialize the device flags, |
| 1096 | * MTU and physical address of the board. |
| 1097 | * |
| 1098 | * Called by: Kernel (/usr/src/linux/net/core/dev.c) |
| 1099 | * (dev->init()) |
| 1100 | * |
| 1101 | * Assumptions: None |
| 1102 | * |
| 1103 | * Warnings: None |
| 1104 | * |
| 1105 | * Return: 0 Ok : Void function. |
| 1106 | */ |
| 1107 | static int if_init(struct net_device* dev) |
| 1108 | { |
| 1109 | x25_channel_t* chan = dev->priv; |
| 1110 | sdla_t* card = chan->card; |
| 1111 | struct wan_device* wandev = &card->wandev; |
| 1112 | |
| 1113 | /* Initialize device driver entry points */ |
| 1114 | dev->open = &if_open; |
| 1115 | dev->stop = &if_close; |
| 1116 | dev->hard_header = &if_header; |
| 1117 | dev->rebuild_header = &if_rebuild_hdr; |
| 1118 | dev->hard_start_xmit = &if_send; |
| 1119 | dev->get_stats = &if_stats; |
| 1120 | dev->tx_timeout = &if_tx_timeout; |
| 1121 | dev->watchdog_timeo = TX_TIMEOUT; |
| 1122 | |
| 1123 | /* Initialize media-specific parameters */ |
| 1124 | dev->type = ARPHRD_PPP; /* ARP h/w type */ |
| 1125 | dev->flags |= IFF_POINTOPOINT; |
| 1126 | dev->flags |= IFF_NOARP; |
| 1127 | |
| 1128 | if (chan->common.usedby == API){ |
| 1129 | dev->mtu = X25_CHAN_MTU+sizeof(x25api_hdr_t); |
| 1130 | }else{ |
| 1131 | dev->mtu = card->wandev.mtu; |
| 1132 | } |
| 1133 | |
| 1134 | dev->hard_header_len = X25_HRDHDR_SZ; /* media header length */ |
| 1135 | dev->addr_len = 2; /* hardware address length */ |
| 1136 | |
| 1137 | if (!chan->common.svc){ |
| 1138 | *(unsigned short*)dev->dev_addr = htons(chan->common.lcn); |
| 1139 | } |
| 1140 | |
| 1141 | /* Initialize hardware parameters (just for reference) */ |
| 1142 | dev->irq = wandev->irq; |
| 1143 | dev->dma = wandev->dma; |
| 1144 | dev->base_addr = wandev->ioport; |
| 1145 | dev->mem_start = (unsigned long)wandev->maddr; |
| 1146 | dev->mem_end = wandev->maddr + wandev->msize - 1; |
| 1147 | |
| 1148 | /* Set transmit buffer queue length */ |
| 1149 | dev->tx_queue_len = 100; |
| 1150 | SET_MODULE_OWNER(dev); |
| 1151 | |
| 1152 | /* FIXME Why are we doing this */ |
| 1153 | set_chan_state(dev, WAN_DISCONNECTED); |
| 1154 | return 0; |
| 1155 | } |
| 1156 | |
| 1157 | |
| 1158 | /*=================================================================== |
| 1159 | * Name: if_open(), Open/Bring up the Netowrk Interface |
| 1160 | * |
| 1161 | * Purpose: To bring up a network interface. |
| 1162 | * |
| 1163 | * Rationale: |
| 1164 | * |
| 1165 | * Description: Open network interface. |
| 1166 | * o prevent module from unloading by incrementing use count |
| 1167 | * o if link is disconnected then initiate connection |
| 1168 | * |
| 1169 | * Called by: Kernel (/usr/src/linux/net/core/dev.c) |
| 1170 | * (dev->open()) |
| 1171 | * |
| 1172 | * Assumptions: None |
| 1173 | * |
| 1174 | * Warnings: None |
| 1175 | * |
| 1176 | * Return: 0 Ok |
| 1177 | * <0 Failure: Interface will not come up. |
| 1178 | */ |
| 1179 | |
| 1180 | static int if_open(struct net_device* dev) |
| 1181 | { |
| 1182 | x25_channel_t* chan = dev->priv; |
| 1183 | sdla_t* card = chan->card; |
| 1184 | struct timeval tv; |
| 1185 | unsigned long smp_flags; |
| 1186 | |
| 1187 | if (netif_running(dev)) |
| 1188 | return -EBUSY; |
| 1189 | |
| 1190 | chan->tq_working = 0; |
| 1191 | |
| 1192 | /* Initialize the workqueue */ |
| 1193 | INIT_WORK(&chan->common.wanpipe_work, (void *)x25api_bh, dev); |
| 1194 | |
| 1195 | /* Allocate and initialize BH circular buffer */ |
| 1196 | /* Add 1 to MAX_BH_BUFF so we don't have test with (MAX_BH_BUFF-1) */ |
| 1197 | chan->bh_head = kmalloc((sizeof(bh_data_t)*(MAX_BH_BUFF+1)),GFP_ATOMIC); |
| 1198 | |
| 1199 | if (chan->bh_head == NULL){ |
| 1200 | printk(KERN_INFO "%s: ERROR, failed to allocate memory ! BH_BUFFERS !\n", |
| 1201 | card->devname); |
| 1202 | |
| 1203 | return -ENOBUFS; |
| 1204 | } |
| 1205 | memset(chan->bh_head,0,(sizeof(bh_data_t)*(MAX_BH_BUFF+1))); |
| 1206 | atomic_set(&chan->bh_buff_used, 0); |
| 1207 | |
| 1208 | /* Increment the number of interfaces */ |
| 1209 | ++card->u.x.no_dev; |
| 1210 | |
| 1211 | wanpipe_open(card); |
| 1212 | |
| 1213 | /* LAPB protocol only uses one interface, thus |
| 1214 | * start the protocol after it comes up. */ |
| 1215 | if (card->u.x.LAPB_hdlc){ |
| 1216 | if (card->open_cnt == 1){ |
| 1217 | TX25Status* status = card->flags; |
| 1218 | S508_S514_lock(card, &smp_flags); |
| 1219 | x25_set_intr_mode(card, INTR_ON_TIMER); |
| 1220 | status->imask &= ~INTR_ON_TIMER; |
| 1221 | S508_S514_unlock(card, &smp_flags); |
| 1222 | } |
| 1223 | }else{ |
| 1224 | /* X25 can have multiple interfaces thus, start the |
| 1225 | * protocol once all interfaces are up */ |
| 1226 | |
| 1227 | //FIXME: There is a bug here. If interface is |
| 1228 | //brought down and up, it will try to enable comm. |
| 1229 | if (card->open_cnt == card->u.x.num_of_ch){ |
| 1230 | |
| 1231 | S508_S514_lock(card, &smp_flags); |
| 1232 | connect(card); |
| 1233 | S508_S514_unlock(card, &smp_flags); |
| 1234 | |
| 1235 | mod_timer(&card->u.x.x25_timer, jiffies + HZ); |
| 1236 | } |
| 1237 | } |
| 1238 | /* Device is not up until the we are in connected state */ |
| 1239 | do_gettimeofday( &tv ); |
| 1240 | chan->router_start_time = tv.tv_sec; |
| 1241 | |
| 1242 | netif_start_queue(dev); |
| 1243 | |
| 1244 | return 0; |
| 1245 | } |
| 1246 | |
| 1247 | /*=================================================================== |
| 1248 | * Name: if_close(), Close/Bring down the Netowrk Interface |
| 1249 | * |
| 1250 | * Purpose: To bring down a network interface. |
| 1251 | * |
| 1252 | * Rationale: |
| 1253 | * |
| 1254 | * Description: Close network interface. |
| 1255 | * o decrement use module use count |
| 1256 | * |
| 1257 | * Called by: Kernel (/usr/src/linux/net/core/dev.c) |
| 1258 | * (dev->close()) |
| 1259 | * ifconfig <name> down: will trigger the kernel |
| 1260 | * which will call this function. |
| 1261 | * |
| 1262 | * Assumptions: None |
| 1263 | * |
| 1264 | * Warnings: None |
| 1265 | * |
| 1266 | * Return: 0 Ok |
| 1267 | * <0 Failure: Interface will not exit properly. |
| 1268 | */ |
| 1269 | static int if_close(struct net_device* dev) |
| 1270 | { |
| 1271 | x25_channel_t* chan = dev->priv; |
| 1272 | sdla_t* card = chan->card; |
| 1273 | unsigned long smp_flags; |
| 1274 | |
| 1275 | netif_stop_queue(dev); |
| 1276 | |
| 1277 | if ((chan->common.state == WAN_CONNECTED) || |
| 1278 | (chan->common.state == WAN_CONNECTING)){ |
| 1279 | S508_S514_lock(card, &smp_flags); |
| 1280 | chan_disc(dev); |
| 1281 | S508_S514_unlock(card, &smp_flags); |
| 1282 | } |
| 1283 | |
| 1284 | wanpipe_close(card); |
| 1285 | |
| 1286 | S508_S514_lock(card, &smp_flags); |
| 1287 | if (chan->bh_head){ |
| 1288 | int i; |
| 1289 | struct sk_buff *skb; |
| 1290 | |
| 1291 | for (i=0; i<(MAX_BH_BUFF+1); i++){ |
| 1292 | skb = ((bh_data_t *)&chan->bh_head[i])->skb; |
| 1293 | if (skb != NULL){ |
| 1294 | dev_kfree_skb_any(skb); |
| 1295 | } |
| 1296 | } |
| 1297 | kfree(chan->bh_head); |
| 1298 | chan->bh_head=NULL; |
| 1299 | } |
| 1300 | S508_S514_unlock(card, &smp_flags); |
| 1301 | |
| 1302 | /* If this is the last close, disconnect physical link */ |
| 1303 | if (!card->open_cnt){ |
| 1304 | S508_S514_lock(card, &smp_flags); |
| 1305 | disconnect(card); |
| 1306 | x25_set_intr_mode(card, 0); |
| 1307 | S508_S514_unlock(card, &smp_flags); |
| 1308 | } |
| 1309 | |
| 1310 | /* Decrement the number of interfaces */ |
| 1311 | --card->u.x.no_dev; |
| 1312 | return 0; |
| 1313 | } |
| 1314 | |
| 1315 | /*====================================================================== |
| 1316 | * Build media header. |
| 1317 | * o encapsulate packet according to encapsulation type. |
| 1318 | * |
| 1319 | * The trick here is to put packet type (Ethertype) into 'protocol' |
| 1320 | * field of the socket buffer, so that we don't forget it. |
| 1321 | * If encapsulation fails, set skb->protocol to 0 and discard |
| 1322 | * packet later. |
| 1323 | * |
| 1324 | * Return: media header length. |
| 1325 | *======================================================================*/ |
| 1326 | |
| 1327 | static int if_header(struct sk_buff* skb, struct net_device* dev, |
| 1328 | unsigned short type, void* daddr, void* saddr, |
| 1329 | unsigned len) |
| 1330 | { |
| 1331 | x25_channel_t* chan = dev->priv; |
| 1332 | int hdr_len = dev->hard_header_len; |
| 1333 | |
| 1334 | skb->protocol = htons(type); |
| 1335 | if (!chan->protocol){ |
| 1336 | hdr_len = wanrouter_encapsulate(skb, dev, type); |
| 1337 | if (hdr_len < 0){ |
| 1338 | hdr_len = 0; |
| 1339 | skb->protocol = htons(0); |
| 1340 | } |
| 1341 | } |
| 1342 | return hdr_len; |
| 1343 | } |
| 1344 | |
| 1345 | /*=============================================================== |
| 1346 | * Re-build media header. |
| 1347 | * |
| 1348 | * Return: 1 physical address resolved. |
| 1349 | * 0 physical address not resolved |
| 1350 | *==============================================================*/ |
| 1351 | |
| 1352 | static int if_rebuild_hdr (struct sk_buff* skb) |
| 1353 | { |
| 1354 | struct net_device *dev = skb->dev; |
| 1355 | x25_channel_t* chan = dev->priv; |
| 1356 | sdla_t* card = chan->card; |
| 1357 | |
| 1358 | printk(KERN_INFO "%s: rebuild_header() called for interface %s!\n", |
| 1359 | card->devname, dev->name); |
| 1360 | return 1; |
| 1361 | } |
| 1362 | |
| 1363 | |
| 1364 | /*============================================================================ |
| 1365 | * Handle transmit timeout event from netif watchdog |
| 1366 | */ |
| 1367 | static void if_tx_timeout(struct net_device *dev) |
| 1368 | { |
| 1369 | x25_channel_t* chan = dev->priv; |
| 1370 | sdla_t *card = chan->card; |
| 1371 | |
| 1372 | /* If our device stays busy for at least 5 seconds then we will |
| 1373 | * kick start the device by making dev->tbusy = 0. We expect |
| 1374 | * that our device never stays busy more than 5 seconds. So this |
| 1375 | * is only used as a last resort. |
| 1376 | */ |
| 1377 | |
| 1378 | ++chan->if_send_stat.if_send_tbusy_timeout; |
| 1379 | printk (KERN_INFO "%s: Transmit timed out on %s\n", |
| 1380 | card->devname, dev->name); |
| 1381 | netif_wake_queue (dev); |
| 1382 | } |
| 1383 | |
| 1384 | |
| 1385 | /*========================================================================= |
| 1386 | * Send a packet on a network interface. |
| 1387 | * o set tbusy flag (marks start of the transmission). |
| 1388 | * o check link state. If link is not up, then drop the packet. |
| 1389 | * o check channel status. If it's down then initiate a call. |
| 1390 | * o pass a packet to corresponding WAN device. |
| 1391 | * o free socket buffer |
| 1392 | * |
| 1393 | * Return: 0 complete (socket buffer must be freed) |
| 1394 | * non-0 packet may be re-transmitted (tbusy must be set) |
| 1395 | * |
| 1396 | * Notes: |
| 1397 | * 1. This routine is called either by the protocol stack or by the "net |
| 1398 | * bottom half" (with interrupts enabled). |
| 1399 | * 2. Setting tbusy flag will inhibit further transmit requests from the |
| 1400 | * protocol stack and can be used for flow control with protocol layer. |
| 1401 | * |
| 1402 | *========================================================================*/ |
| 1403 | |
| 1404 | static int if_send(struct sk_buff* skb, struct net_device* dev) |
| 1405 | { |
| 1406 | x25_channel_t* chan = dev->priv; |
| 1407 | sdla_t* card = chan->card; |
| 1408 | TX25Status* status = card->flags; |
| 1409 | int udp_type; |
| 1410 | unsigned long smp_flags=0; |
| 1411 | |
| 1412 | ++chan->if_send_stat.if_send_entry; |
| 1413 | |
| 1414 | netif_stop_queue(dev); |
| 1415 | |
| 1416 | /* No need to check frame length, since socket code |
| 1417 | * will perform the check for us */ |
| 1418 | |
| 1419 | chan->tick_counter = jiffies; |
| 1420 | |
| 1421 | /* Critical region starts here */ |
| 1422 | S508_S514_lock(card, &smp_flags); |
| 1423 | |
| 1424 | if (test_and_set_bit(SEND_CRIT, (void*)&card->wandev.critical)){ |
| 1425 | printk(KERN_INFO "Hit critical in if_send()! %lx\n",card->wandev.critical); |
| 1426 | goto if_send_crit_exit; |
| 1427 | } |
| 1428 | |
| 1429 | udp_type = udp_pkt_type(skb, card); |
| 1430 | |
| 1431 | if(udp_type != UDP_INVALID_TYPE) { |
| 1432 | |
| 1433 | if(store_udp_mgmt_pkt(udp_type, UDP_PKT_FRM_STACK, card, dev, skb, |
| 1434 | chan->common.lcn)) { |
| 1435 | |
| 1436 | status->imask |= INTR_ON_TIMER; |
| 1437 | if (udp_type == UDP_XPIPE_TYPE){ |
| 1438 | chan->if_send_stat.if_send_PIPE_request++; |
| 1439 | } |
| 1440 | } |
| 1441 | netif_start_queue(dev); |
| 1442 | clear_bit(SEND_CRIT,(void*)&card->wandev.critical); |
| 1443 | S508_S514_unlock(card, &smp_flags); |
| 1444 | return 0; |
| 1445 | } |
| 1446 | |
| 1447 | if (chan->transmit_length){ |
| 1448 | //FIXME: This check doesn't make sense any more |
| 1449 | if (chan->common.state != WAN_CONNECTED){ |
| 1450 | chan->transmit_length=0; |
| 1451 | atomic_set(&chan->common.driver_busy,0); |
| 1452 | }else{ |
| 1453 | netif_stop_queue(dev); |
| 1454 | ++card->u.x.tx_interrupts_pending; |
| 1455 | status->imask |= INTR_ON_TX_FRAME; |
| 1456 | clear_bit(SEND_CRIT,(void*)&card->wandev.critical); |
| 1457 | S508_S514_unlock(card, &smp_flags); |
| 1458 | return 1; |
| 1459 | } |
| 1460 | } |
| 1461 | |
| 1462 | if (card->wandev.state != WAN_CONNECTED){ |
| 1463 | ++chan->ifstats.tx_dropped; |
| 1464 | ++card->wandev.stats.tx_dropped; |
| 1465 | ++chan->if_send_stat.if_send_wan_disconnected; |
| 1466 | |
| 1467 | }else if ( chan->protocol && (chan->protocol != skb->protocol)){ |
| 1468 | printk(KERN_INFO |
| 1469 | "%s: unsupported Ethertype 0x%04X on interface %s!\n", |
| 1470 | chan->name, htons(skb->protocol), dev->name); |
| 1471 | |
| 1472 | printk(KERN_INFO "PROTO %Xn", htons(chan->protocol)); |
| 1473 | ++chan->ifstats.tx_errors; |
| 1474 | ++chan->ifstats.tx_dropped; |
| 1475 | ++card->wandev.stats.tx_dropped; |
| 1476 | ++chan->if_send_stat.if_send_protocol_error; |
| 1477 | |
| 1478 | }else switch (chan->common.state){ |
| 1479 | |
| 1480 | case WAN_DISCONNECTED: |
| 1481 | /* Try to establish connection. If succeded, then start |
| 1482 | * transmission, else drop a packet. |
| 1483 | */ |
| 1484 | if (chan->common.usedby == API){ |
| 1485 | ++chan->ifstats.tx_dropped; |
| 1486 | ++card->wandev.stats.tx_dropped; |
| 1487 | break; |
| 1488 | }else{ |
| 1489 | if (chan_connect(dev) != 0){ |
| 1490 | ++chan->ifstats.tx_dropped; |
| 1491 | ++card->wandev.stats.tx_dropped; |
| 1492 | break; |
| 1493 | } |
| 1494 | } |
| 1495 | /* fall through */ |
| 1496 | |
| 1497 | case WAN_CONNECTED: |
| 1498 | if( skb->protocol == htons(ETH_P_IPX)) { |
| 1499 | if(chan->enable_IPX) { |
| 1500 | switch_net_numbers( skb->data, |
| 1501 | chan->network_number, 0); |
| 1502 | } else { |
| 1503 | ++card->wandev.stats.tx_dropped; |
| 1504 | ++chan->ifstats.tx_dropped; |
| 1505 | ++chan->if_send_stat.if_send_protocol_error; |
| 1506 | goto if_send_crit_exit; |
| 1507 | } |
| 1508 | } |
| 1509 | /* We never drop here, if cannot send than, copy |
| 1510 | * a packet into a transmit buffer |
| 1511 | */ |
| 1512 | chan_send(dev, skb->data, skb->len, 0); |
| 1513 | break; |
| 1514 | |
| 1515 | default: |
| 1516 | ++chan->ifstats.tx_dropped; |
| 1517 | ++card->wandev.stats.tx_dropped; |
| 1518 | break; |
| 1519 | } |
| 1520 | |
| 1521 | |
| 1522 | if_send_crit_exit: |
| 1523 | |
| 1524 | dev_kfree_skb_any(skb); |
| 1525 | |
| 1526 | netif_start_queue(dev); |
| 1527 | clear_bit(SEND_CRIT,(void*)&card->wandev.critical); |
| 1528 | S508_S514_unlock(card, &smp_flags); |
| 1529 | return 0; |
| 1530 | } |
| 1531 | |
| 1532 | /*============================================================================ |
| 1533 | * Setup so that a frame can be transmitted on the occurrence of a transmit |
| 1534 | * interrupt. |
| 1535 | *===========================================================================*/ |
| 1536 | |
| 1537 | static void setup_for_delayed_transmit(struct net_device* dev, void* buf, |
| 1538 | unsigned len) |
| 1539 | { |
| 1540 | x25_channel_t* chan = dev->priv; |
| 1541 | sdla_t* card = chan->card; |
| 1542 | TX25Status* status = card->flags; |
| 1543 | |
| 1544 | ++chan->if_send_stat.if_send_adptr_bfrs_full; |
| 1545 | |
| 1546 | if(chan->transmit_length) { |
| 1547 | printk(KERN_INFO "%s: Error, transmit length set in delayed transmit!\n", |
| 1548 | card->devname); |
| 1549 | return; |
| 1550 | } |
| 1551 | |
| 1552 | if (chan->common.usedby == API){ |
| 1553 | if (len > X25_CHAN_MTU+sizeof(x25api_hdr_t)) { |
| 1554 | ++chan->ifstats.tx_dropped; |
| 1555 | ++card->wandev.stats.tx_dropped; |
| 1556 | printk(KERN_INFO "%s: Length is too big for delayed transmit\n", |
| 1557 | card->devname); |
| 1558 | return; |
| 1559 | } |
| 1560 | }else{ |
| 1561 | if (len > X25_MAX_DATA) { |
| 1562 | ++chan->ifstats.tx_dropped; |
| 1563 | ++card->wandev.stats.tx_dropped; |
| 1564 | printk(KERN_INFO "%s: Length is too big for delayed transmit\n", |
| 1565 | card->devname); |
| 1566 | return; |
| 1567 | } |
| 1568 | } |
| 1569 | |
| 1570 | chan->transmit_length = len; |
| 1571 | atomic_set(&chan->common.driver_busy,1); |
| 1572 | memcpy(chan->transmit_buffer, buf, len); |
| 1573 | |
| 1574 | ++chan->if_send_stat.if_send_tx_int_enabled; |
| 1575 | |
| 1576 | /* Enable Transmit Interrupt */ |
| 1577 | ++card->u.x.tx_interrupts_pending; |
| 1578 | status->imask |= INTR_ON_TX_FRAME; |
| 1579 | } |
| 1580 | |
| 1581 | |
| 1582 | /*=============================================================== |
| 1583 | * net_device_stats |
| 1584 | * |
| 1585 | * Get ethernet-style interface statistics. |
| 1586 | * Return a pointer to struct enet_statistics. |
| 1587 | * |
| 1588 | *==============================================================*/ |
| 1589 | static struct net_device_stats *if_stats(struct net_device* dev) |
| 1590 | { |
| 1591 | x25_channel_t *chan = dev->priv; |
| 1592 | |
| 1593 | if(chan == NULL) |
| 1594 | return NULL; |
| 1595 | |
| 1596 | return &chan->ifstats; |
| 1597 | } |
| 1598 | |
| 1599 | |
| 1600 | /* |
| 1601 | * Interrupt Handlers |
| 1602 | */ |
| 1603 | |
| 1604 | /* |
| 1605 | * X.25 Interrupt Service Routine. |
| 1606 | */ |
| 1607 | |
| 1608 | static void wpx_isr (sdla_t* card) |
| 1609 | { |
| 1610 | TX25Status* status = card->flags; |
| 1611 | |
| 1612 | card->in_isr = 1; |
| 1613 | ++card->statistics.isr_entry; |
| 1614 | |
| 1615 | if (test_bit(PERI_CRIT,(void*)&card->wandev.critical)){ |
| 1616 | card->in_isr=0; |
| 1617 | status->iflags = 0; |
| 1618 | return; |
| 1619 | } |
| 1620 | |
| 1621 | if (test_bit(SEND_CRIT, (void*)&card->wandev.critical)){ |
| 1622 | |
| 1623 | printk(KERN_INFO "%s: wpx_isr: wandev.critical set to 0x%02lx, int type = 0x%02x\n", |
| 1624 | card->devname, card->wandev.critical, status->iflags); |
| 1625 | card->in_isr = 0; |
| 1626 | status->iflags = 0; |
| 1627 | return; |
| 1628 | } |
| 1629 | |
| 1630 | /* For all interrupts set the critical flag to CRITICAL_RX_INTR. |
| 1631 | * If the if_send routine is called with this flag set it will set |
| 1632 | * the enable transmit flag to 1. (for a delayed interrupt) |
| 1633 | */ |
| 1634 | switch (status->iflags){ |
| 1635 | |
| 1636 | case RX_INTR_PENDING: /* receive interrupt */ |
| 1637 | rx_intr(card); |
| 1638 | break; |
| 1639 | |
| 1640 | case TX_INTR_PENDING: /* transmit interrupt */ |
| 1641 | tx_intr(card); |
| 1642 | break; |
| 1643 | |
| 1644 | case MODEM_INTR_PENDING: /* modem status interrupt */ |
| 1645 | status_intr(card); |
| 1646 | break; |
| 1647 | |
| 1648 | case X25_ASY_TRANS_INTR_PENDING: /* network event interrupt */ |
| 1649 | event_intr(card); |
| 1650 | break; |
| 1651 | |
| 1652 | case TIMER_INTR_PENDING: |
| 1653 | timer_intr(card); |
| 1654 | break; |
| 1655 | |
| 1656 | default: /* unwanted interrupt */ |
| 1657 | spur_intr(card); |
| 1658 | } |
| 1659 | |
| 1660 | card->in_isr = 0; |
| 1661 | status->iflags = 0; /* clear interrupt condition */ |
| 1662 | } |
| 1663 | |
| 1664 | /* |
| 1665 | * Receive interrupt handler. |
| 1666 | * This routine handles fragmented IP packets using M-bit according to the |
| 1667 | * RFC1356. |
| 1668 | * o map ligical channel number to network interface. |
| 1669 | * o allocate socket buffer or append received packet to the existing one. |
| 1670 | * o if M-bit is reset (i.e. it's the last packet in a sequence) then |
| 1671 | * decapsulate packet and pass socket buffer to the protocol stack. |
| 1672 | * |
| 1673 | * Notes: |
| 1674 | * 1. When allocating a socket buffer, if M-bit is set then more data is |
| 1675 | * coming and we have to allocate buffer for the maximum IP packet size |
| 1676 | * expected on this channel. |
| 1677 | * 2. If something goes wrong and X.25 packet has to be dropped (e.g. no |
| 1678 | * socket buffers available) the whole packet sequence must be discarded. |
| 1679 | */ |
| 1680 | |
| 1681 | static void rx_intr (sdla_t* card) |
| 1682 | { |
| 1683 | TX25Mbox* rxmb = card->rxmb; |
| 1684 | unsigned lcn = rxmb->cmd.lcn; |
| 1685 | struct net_device* dev = find_channel(card,lcn); |
| 1686 | x25_channel_t* chan; |
| 1687 | struct sk_buff* skb=NULL; |
| 1688 | |
| 1689 | if (dev == NULL){ |
| 1690 | /* Invalid channel, discard packet */ |
| 1691 | printk(KERN_INFO "%s: receiving on orphaned LCN %d!\n", |
| 1692 | card->devname, lcn); |
| 1693 | return; |
| 1694 | } |
| 1695 | |
| 1696 | chan = dev->priv; |
| 1697 | chan->i_timeout_sofar = jiffies; |
| 1698 | |
| 1699 | |
| 1700 | /* Copy the data from the board, into an |
| 1701 | * skb buffer |
| 1702 | */ |
| 1703 | if (wanpipe_pull_data_in_skb(card,dev,&skb)){ |
| 1704 | ++chan->ifstats.rx_dropped; |
| 1705 | ++card->wandev.stats.rx_dropped; |
| 1706 | ++chan->rx_intr_stat.rx_intr_no_socket; |
| 1707 | ++chan->rx_intr_stat.rx_intr_bfr_not_passed_to_stack; |
| 1708 | return; |
| 1709 | } |
| 1710 | |
| 1711 | dev->last_rx = jiffies; /* timestamp */ |
| 1712 | |
| 1713 | |
| 1714 | /* ------------ API ----------------*/ |
| 1715 | |
| 1716 | if (chan->common.usedby == API){ |
| 1717 | |
| 1718 | if (bh_enqueue(dev, skb)){ |
| 1719 | ++chan->ifstats.rx_dropped; |
| 1720 | ++card->wandev.stats.rx_dropped; |
| 1721 | ++chan->rx_intr_stat.rx_intr_bfr_not_passed_to_stack; |
| 1722 | dev_kfree_skb_any(skb); |
| 1723 | return; |
| 1724 | } |
| 1725 | |
| 1726 | ++chan->ifstats.rx_packets; |
| 1727 | chan->ifstats.rx_bytes += skb->len; |
| 1728 | |
| 1729 | |
| 1730 | chan->rx_skb = NULL; |
| 1731 | if (!test_and_set_bit(0, &chan->tq_working)){ |
| 1732 | wanpipe_queue_work(&chan->common.wanpipe_work); |
| 1733 | } |
| 1734 | return; |
| 1735 | } |
| 1736 | |
| 1737 | |
| 1738 | /* ------------- WANPIPE -------------------*/ |
| 1739 | |
| 1740 | /* set rx_skb to NULL so we won't access it later when kernel already owns it */ |
| 1741 | chan->rx_skb=NULL; |
| 1742 | |
| 1743 | /* Decapsulate packet, if necessary */ |
| 1744 | if (!skb->protocol && !wanrouter_type_trans(skb, dev)){ |
| 1745 | /* can't decapsulate packet */ |
| 1746 | dev_kfree_skb_any(skb); |
| 1747 | ++chan->ifstats.rx_errors; |
| 1748 | ++chan->ifstats.rx_dropped; |
| 1749 | ++card->wandev.stats.rx_dropped; |
| 1750 | ++chan->rx_intr_stat.rx_intr_bfr_not_passed_to_stack; |
| 1751 | |
| 1752 | }else{ |
| 1753 | if( handle_IPXWAN(skb->data, chan->name, |
| 1754 | chan->enable_IPX, chan->network_number, |
| 1755 | skb->protocol)){ |
| 1756 | |
| 1757 | if( chan->enable_IPX ){ |
| 1758 | if(chan_send(dev, skb->data, skb->len,0)){ |
| 1759 | chan->tx_skb = skb; |
| 1760 | }else{ |
| 1761 | dev_kfree_skb_any(skb); |
| 1762 | ++chan->rx_intr_stat.rx_intr_bfr_not_passed_to_stack; |
| 1763 | } |
| 1764 | }else{ |
| 1765 | /* increment IPX packet dropped statistic */ |
| 1766 | ++chan->ifstats.rx_dropped; |
| 1767 | ++chan->rx_intr_stat.rx_intr_bfr_not_passed_to_stack; |
| 1768 | } |
| 1769 | }else{ |
| 1770 | skb->mac.raw = skb->data; |
| 1771 | chan->ifstats.rx_bytes += skb->len; |
| 1772 | ++chan->ifstats.rx_packets; |
| 1773 | ++chan->rx_intr_stat.rx_intr_bfr_passed_to_stack; |
| 1774 | netif_rx(skb); |
| 1775 | } |
| 1776 | } |
| 1777 | |
| 1778 | return; |
| 1779 | } |
| 1780 | |
| 1781 | |
| 1782 | static int wanpipe_pull_data_in_skb(sdla_t *card, struct net_device *dev, |
| 1783 | struct sk_buff **skb) |
| 1784 | { |
| 1785 | void *bufptr; |
| 1786 | TX25Mbox* rxmb = card->rxmb; |
| 1787 | unsigned len = rxmb->cmd.length; /* packet length */ |
| 1788 | unsigned qdm = rxmb->cmd.qdm; /* Q,D and M bits */ |
| 1789 | x25_channel_t *chan = dev->priv; |
| 1790 | struct sk_buff *new_skb = *skb; |
| 1791 | |
| 1792 | if (chan->common.usedby == WANPIPE){ |
| 1793 | if (chan->drop_sequence){ |
| 1794 | if (!(qdm & 0x01)){ |
| 1795 | chan->drop_sequence = 0; |
| 1796 | } |
| 1797 | return 1; |
| 1798 | } |
| 1799 | new_skb = chan->rx_skb; |
| 1800 | }else{ |
| 1801 | /* Add on the API header to the received |
| 1802 | * data |
| 1803 | */ |
| 1804 | len += sizeof(x25api_hdr_t); |
| 1805 | } |
| 1806 | |
| 1807 | if (new_skb == NULL){ |
| 1808 | int bufsize; |
| 1809 | |
| 1810 | if (chan->common.usedby == WANPIPE){ |
| 1811 | bufsize = (qdm & 0x01) ? dev->mtu : len; |
| 1812 | }else{ |
| 1813 | bufsize = len; |
| 1814 | } |
| 1815 | |
| 1816 | /* Allocate new socket buffer */ |
| 1817 | new_skb = dev_alloc_skb(bufsize + dev->hard_header_len); |
| 1818 | if (new_skb == NULL){ |
| 1819 | printk(KERN_INFO "%s: no socket buffers available!\n", |
| 1820 | card->devname); |
| 1821 | chan->drop_sequence = 1; /* set flag */ |
| 1822 | ++chan->ifstats.rx_dropped; |
| 1823 | return 1; |
| 1824 | } |
| 1825 | } |
| 1826 | |
| 1827 | if (skb_tailroom(new_skb) < len){ |
| 1828 | /* No room for the packet. Call off the whole thing! */ |
| 1829 | dev_kfree_skb_any(new_skb); |
| 1830 | if (chan->common.usedby == WANPIPE){ |
| 1831 | chan->rx_skb = NULL; |
| 1832 | if (qdm & 0x01){ |
| 1833 | chan->drop_sequence = 1; |
| 1834 | } |
| 1835 | } |
| 1836 | |
| 1837 | printk(KERN_INFO "%s: unexpectedly long packet sequence " |
| 1838 | "on interface %s!\n", card->devname, dev->name); |
| 1839 | ++chan->ifstats.rx_length_errors; |
| 1840 | return 1; |
| 1841 | } |
| 1842 | |
| 1843 | bufptr = skb_put(new_skb,len); |
| 1844 | |
| 1845 | |
| 1846 | if (chan->common.usedby == API){ |
| 1847 | /* Fill in the x25api header |
| 1848 | */ |
| 1849 | x25api_t * api_data = (x25api_t*)bufptr; |
| 1850 | api_data->hdr.qdm = rxmb->cmd.qdm; |
| 1851 | api_data->hdr.cause = rxmb->cmd.cause; |
| 1852 | api_data->hdr.diagn = rxmb->cmd.diagn; |
| 1853 | api_data->hdr.length = rxmb->cmd.length; |
| 1854 | memcpy(api_data->data, rxmb->data, rxmb->cmd.length); |
| 1855 | }else{ |
| 1856 | memcpy(bufptr, rxmb->data, len); |
| 1857 | } |
| 1858 | |
| 1859 | new_skb->dev = dev; |
| 1860 | |
| 1861 | if (chan->common.usedby == API){ |
| 1862 | new_skb->mac.raw = new_skb->data; |
| 1863 | new_skb->protocol = htons(X25_PROT); |
| 1864 | new_skb->pkt_type = WAN_PACKET_DATA; |
| 1865 | }else{ |
| 1866 | new_skb->protocol = chan->protocol; |
| 1867 | chan->rx_skb = new_skb; |
| 1868 | } |
| 1869 | |
| 1870 | /* If qdm bit is set, more data is coming |
| 1871 | * thus, exit and wait for more data before |
| 1872 | * sending the packet up. (Used by router only) |
| 1873 | */ |
| 1874 | if ((qdm & 0x01) && (chan->common.usedby == WANPIPE)) |
| 1875 | return 1; |
| 1876 | |
| 1877 | *skb = new_skb; |
| 1878 | |
| 1879 | return 0; |
| 1880 | } |
| 1881 | |
| 1882 | /*=============================================================== |
| 1883 | * tx_intr |
| 1884 | * |
| 1885 | * Transmit interrupt handler. |
| 1886 | * For each dev, check that there is something to send. |
| 1887 | * If data available, transmit. |
| 1888 | * |
| 1889 | *===============================================================*/ |
| 1890 | |
| 1891 | static void tx_intr (sdla_t* card) |
| 1892 | { |
| 1893 | struct net_device *dev; |
| 1894 | TX25Status* status = card->flags; |
| 1895 | unsigned char more_to_tx=0; |
| 1896 | x25_channel_t *chan=NULL; |
| 1897 | int i=0; |
| 1898 | |
| 1899 | if (card->u.x.tx_dev == NULL){ |
| 1900 | card->u.x.tx_dev = card->wandev.dev; |
| 1901 | } |
| 1902 | |
| 1903 | dev = card->u.x.tx_dev; |
| 1904 | |
| 1905 | for (;;){ |
| 1906 | |
| 1907 | chan = dev->priv; |
| 1908 | if (chan->transmit_length){ |
| 1909 | /* Device was set to transmit, check if the TX |
| 1910 | * buffers are available |
| 1911 | */ |
| 1912 | if (chan->common.state != WAN_CONNECTED){ |
| 1913 | chan->transmit_length = 0; |
| 1914 | atomic_set(&chan->common.driver_busy,0); |
| 1915 | chan->tx_offset=0; |
| 1916 | if (netif_queue_stopped(dev)){ |
| 1917 | if (chan->common.usedby == API){ |
| 1918 | netif_start_queue(dev); |
| 1919 | wakeup_sk_bh(dev); |
| 1920 | }else{ |
| 1921 | netif_wake_queue(dev); |
| 1922 | } |
| 1923 | } |
| 1924 | dev = move_dev_to_next(card,dev); |
| 1925 | break; |
| 1926 | } |
| 1927 | |
| 1928 | if ((status->cflags[chan->ch_idx] & 0x40 || card->u.x.LAPB_hdlc) && |
| 1929 | (*card->u.x.hdlc_buf_status & 0x40) ){ |
| 1930 | /* Tx buffer available, we can send */ |
| 1931 | |
| 1932 | if (tx_intr_send(card, dev)){ |
| 1933 | more_to_tx=1; |
| 1934 | } |
| 1935 | |
| 1936 | /* If more than one interface present, move the |
| 1937 | * device pointer to the next interface, so on the |
| 1938 | * next TX interrupt we will try sending from it. |
| 1939 | */ |
| 1940 | dev = move_dev_to_next(card,dev); |
| 1941 | break; |
| 1942 | }else{ |
| 1943 | /* Tx buffers not available, but device set |
| 1944 | * the TX interrupt. Set more_to_tx and try |
| 1945 | * to transmit for other devices. |
| 1946 | */ |
| 1947 | more_to_tx=1; |
| 1948 | dev = move_dev_to_next(card,dev); |
| 1949 | } |
| 1950 | |
| 1951 | }else{ |
| 1952 | /* This device was not set to transmit, |
| 1953 | * go to next |
| 1954 | */ |
| 1955 | dev = move_dev_to_next(card,dev); |
| 1956 | } |
| 1957 | |
| 1958 | if (++i == card->u.x.no_dev){ |
| 1959 | if (!more_to_tx){ |
| 1960 | DBG_PRINTK(KERN_INFO "%s: Nothing to Send in TX INTR\n", |
| 1961 | card->devname); |
| 1962 | } |
| 1963 | break; |
| 1964 | } |
| 1965 | |
| 1966 | } //End of FOR |
| 1967 | |
| 1968 | card->u.x.tx_dev = dev; |
| 1969 | |
| 1970 | if (!more_to_tx){ |
| 1971 | /* if any other interfaces have transmit interrupts pending, */ |
| 1972 | /* do not disable the global transmit interrupt */ |
| 1973 | if (!(--card->u.x.tx_interrupts_pending)){ |
| 1974 | status->imask &= ~INTR_ON_TX_FRAME; |
| 1975 | } |
| 1976 | } |
| 1977 | return; |
| 1978 | } |
| 1979 | |
| 1980 | /*=============================================================== |
| 1981 | * move_dev_to_next |
| 1982 | * |
| 1983 | * |
| 1984 | *===============================================================*/ |
| 1985 | |
| 1986 | |
| 1987 | struct net_device *move_dev_to_next(sdla_t *card, struct net_device *dev) |
| 1988 | { |
| 1989 | if (card->u.x.no_dev != 1){ |
| 1990 | if (!*((struct net_device **)dev->priv)) |
| 1991 | return card->wandev.dev; |
| 1992 | else |
| 1993 | return *((struct net_device **)dev->priv); |
| 1994 | } |
| 1995 | return dev; |
| 1996 | } |
| 1997 | |
| 1998 | /*=============================================================== |
| 1999 | * tx_intr_send |
| 2000 | * |
| 2001 | * |
| 2002 | *===============================================================*/ |
| 2003 | |
| 2004 | static int tx_intr_send(sdla_t *card, struct net_device *dev) |
| 2005 | { |
| 2006 | x25_channel_t* chan = dev->priv; |
| 2007 | |
| 2008 | if (chan_send (dev,chan->transmit_buffer,chan->transmit_length,1)){ |
| 2009 | |
| 2010 | /* Packet was split up due to its size, do not disable |
| 2011 | * tx_intr |
| 2012 | */ |
| 2013 | return 1; |
| 2014 | } |
| 2015 | |
| 2016 | chan->transmit_length=0; |
| 2017 | atomic_set(&chan->common.driver_busy,0); |
| 2018 | chan->tx_offset=0; |
| 2019 | |
| 2020 | /* If we are in API mode, wakeup the |
| 2021 | * sock BH handler, not the NET_BH */ |
| 2022 | if (netif_queue_stopped(dev)){ |
| 2023 | if (chan->common.usedby == API){ |
| 2024 | netif_start_queue(dev); |
| 2025 | wakeup_sk_bh(dev); |
| 2026 | }else{ |
| 2027 | netif_wake_queue(dev); |
| 2028 | } |
| 2029 | } |
| 2030 | return 0; |
| 2031 | } |
| 2032 | |
| 2033 | |
| 2034 | /*=============================================================== |
| 2035 | * timer_intr |
| 2036 | * |
| 2037 | * Timer interrupt handler. |
| 2038 | * Check who called the timer interrupt and perform |
| 2039 | * action accordingly. |
| 2040 | * |
| 2041 | *===============================================================*/ |
| 2042 | |
| 2043 | static void timer_intr (sdla_t *card) |
| 2044 | { |
| 2045 | TX25Status* status = card->flags; |
| 2046 | |
| 2047 | if (card->u.x.timer_int_enabled & TMR_INT_ENABLED_CMD_EXEC){ |
| 2048 | |
| 2049 | if (timer_intr_cmd_exec(card) == 0){ |
| 2050 | card->u.x.timer_int_enabled &= |
| 2051 | ~TMR_INT_ENABLED_CMD_EXEC; |
| 2052 | } |
| 2053 | |
| 2054 | }else if(card->u.x.timer_int_enabled & TMR_INT_ENABLED_UDP_PKT) { |
| 2055 | |
| 2056 | if ((*card->u.x.hdlc_buf_status & 0x40) && |
| 2057 | card->u.x.udp_type == UDP_XPIPE_TYPE){ |
| 2058 | |
| 2059 | if(process_udp_mgmt_pkt(card)) { |
| 2060 | card->u.x.timer_int_enabled &= |
| 2061 | ~TMR_INT_ENABLED_UDP_PKT; |
| 2062 | } |
| 2063 | } |
| 2064 | |
| 2065 | }else if (card->u.x.timer_int_enabled & TMR_INT_ENABLED_POLL_ACTIVE) { |
| 2066 | |
| 2067 | struct net_device *dev = card->u.x.poll_device; |
| 2068 | x25_channel_t *chan = NULL; |
| 2069 | |
| 2070 | if (!dev){ |
| 2071 | card->u.x.timer_int_enabled &= ~TMR_INT_ENABLED_POLL_ACTIVE; |
| 2072 | return; |
| 2073 | } |
| 2074 | chan = dev->priv; |
| 2075 | |
| 2076 | printk(KERN_INFO |
| 2077 | "%s: Closing down Idle link %s on LCN %d\n", |
| 2078 | card->devname,chan->name,chan->common.lcn); |
| 2079 | chan->i_timeout_sofar = jiffies; |
| 2080 | chan_disc(dev); |
| 2081 | card->u.x.timer_int_enabled &= ~TMR_INT_ENABLED_POLL_ACTIVE; |
| 2082 | card->u.x.poll_device=NULL; |
| 2083 | |
| 2084 | }else if (card->u.x.timer_int_enabled & TMR_INT_ENABLED_POLL_CONNECT_ON) { |
| 2085 | |
| 2086 | wanpipe_set_state(card, WAN_CONNECTED); |
| 2087 | if (card->u.x.LAPB_hdlc){ |
| 2088 | struct net_device *dev = card->wandev.dev; |
| 2089 | set_chan_state(dev,WAN_CONNECTED); |
| 2090 | send_delayed_cmd_result(card,dev,card->mbox); |
| 2091 | } |
| 2092 | |
| 2093 | /* 0x8F enable all interrupts */ |
| 2094 | x25_set_intr_mode(card, INTR_ON_RX_FRAME| |
| 2095 | INTR_ON_TX_FRAME| |
| 2096 | INTR_ON_MODEM_STATUS_CHANGE| |
| 2097 | //INTR_ON_COMMAND_COMPLETE| |
| 2098 | X25_ASY_TRANS_INTR_PENDING | |
| 2099 | INTR_ON_TIMER | |
| 2100 | DIRECT_RX_INTR_USAGE |
| 2101 | ); |
| 2102 | |
| 2103 | status->imask &= ~INTR_ON_TX_FRAME; /* mask Tx interrupts */ |
| 2104 | card->u.x.timer_int_enabled &= ~TMR_INT_ENABLED_POLL_CONNECT_ON; |
| 2105 | |
| 2106 | }else if (card->u.x.timer_int_enabled & TMR_INT_ENABLED_POLL_CONNECT_OFF) { |
| 2107 | |
| 2108 | //printk(KERN_INFO "Poll connect, Turning OFF\n"); |
| 2109 | disconnect(card); |
| 2110 | card->u.x.timer_int_enabled &= ~TMR_INT_ENABLED_POLL_CONNECT_OFF; |
| 2111 | |
| 2112 | }else if (card->u.x.timer_int_enabled & TMR_INT_ENABLED_POLL_DISCONNECT) { |
| 2113 | |
| 2114 | //printk(KERN_INFO "POll disconnect, trying to connect\n"); |
| 2115 | connect(card); |
| 2116 | card->u.x.timer_int_enabled &= ~TMR_INT_ENABLED_POLL_DISCONNECT; |
| 2117 | |
| 2118 | }else if (card->u.x.timer_int_enabled & TMR_INT_ENABLED_UPDATE){ |
| 2119 | |
| 2120 | if (*card->u.x.hdlc_buf_status & 0x40){ |
| 2121 | x25_get_err_stats(card); |
| 2122 | x25_get_stats(card); |
| 2123 | card->u.x.timer_int_enabled &= ~TMR_INT_ENABLED_UPDATE; |
| 2124 | } |
| 2125 | } |
| 2126 | |
| 2127 | if(!card->u.x.timer_int_enabled){ |
| 2128 | //printk(KERN_INFO "Turning Timer Off \n"); |
| 2129 | status->imask &= ~INTR_ON_TIMER; |
| 2130 | } |
| 2131 | } |
| 2132 | |
| 2133 | /*==================================================================== |
| 2134 | * Modem status interrupt handler. |
| 2135 | *===================================================================*/ |
| 2136 | static void status_intr (sdla_t* card) |
| 2137 | { |
| 2138 | |
| 2139 | /* Added to avoid Modem status message flooding */ |
| 2140 | static TX25ModemStatus last_stat; |
| 2141 | |
| 2142 | TX25Mbox* mbox = card->mbox; |
| 2143 | TX25ModemStatus *modem_status; |
| 2144 | struct net_device *dev; |
| 2145 | x25_channel_t *chan; |
| 2146 | int err; |
| 2147 | |
| 2148 | memset(&mbox->cmd, 0, sizeof(TX25Cmd)); |
| 2149 | mbox->cmd.command = X25_READ_MODEM_STATUS; |
| 2150 | err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; |
| 2151 | if (err){ |
| 2152 | x25_error(card, err, X25_READ_MODEM_STATUS, 0); |
| 2153 | }else{ |
| 2154 | |
| 2155 | modem_status = (TX25ModemStatus*)mbox->data; |
| 2156 | |
| 2157 | /* Check if the last status was the same |
| 2158 | * if it was, do NOT print message again */ |
| 2159 | |
| 2160 | if (last_stat.status != modem_status->status){ |
| 2161 | |
| 2162 | printk(KERN_INFO "%s: Modem Status Change: DCD=%s, CTS=%s\n", |
| 2163 | card->devname,DCD(modem_status->status),CTS(modem_status->status)); |
| 2164 | |
| 2165 | last_stat.status = modem_status->status; |
| 2166 | |
| 2167 | if (card->u.x.oob_on_modem){ |
| 2168 | |
| 2169 | mbox->cmd.pktType = mbox->cmd.command; |
| 2170 | mbox->cmd.result = 0x08; |
| 2171 | |
| 2172 | /* Send a OOB to all connected sockets */ |
| 2173 | for (dev = card->wandev.dev; dev; |
| 2174 | dev = *((struct net_device**)dev->priv)) { |
| 2175 | chan=dev->priv; |
| 2176 | if (chan->common.usedby == API){ |
| 2177 | send_oob_msg(card,dev,mbox); |
| 2178 | } |
| 2179 | } |
| 2180 | |
| 2181 | /* The modem OOB message will probably kill the |
| 2182 | * the link. If we don't clear the flag here, |
| 2183 | * a deadlock could occur */ |
| 2184 | if (atomic_read(&card->u.x.command_busy)){ |
| 2185 | atomic_set(&card->u.x.command_busy,0); |
| 2186 | } |
| 2187 | } |
| 2188 | } |
| 2189 | } |
| 2190 | |
| 2191 | memset(&mbox->cmd, 0, sizeof(TX25Cmd)); |
| 2192 | mbox->cmd.command = X25_HDLC_LINK_STATUS; |
| 2193 | err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; |
| 2194 | if (err){ |
| 2195 | x25_error(card, err, X25_HDLC_LINK_STATUS, 0); |
| 2196 | } |
| 2197 | |
| 2198 | } |
| 2199 | |
| 2200 | /*==================================================================== |
| 2201 | * Network event interrupt handler. |
| 2202 | *===================================================================*/ |
| 2203 | static void event_intr (sdla_t* card) |
| 2204 | { |
| 2205 | x25_fetch_events(card); |
| 2206 | } |
| 2207 | |
| 2208 | /*==================================================================== |
| 2209 | * Spurious interrupt handler. |
| 2210 | * o print a warning |
| 2211 | * o |
| 2212 | *====================================================================*/ |
| 2213 | |
| 2214 | static void spur_intr (sdla_t* card) |
| 2215 | { |
| 2216 | printk(KERN_INFO "%s: spurious interrupt!\n", card->devname); |
| 2217 | } |
| 2218 | |
| 2219 | |
| 2220 | /* |
| 2221 | * Background Polling Routines |
| 2222 | */ |
| 2223 | |
| 2224 | /*==================================================================== |
| 2225 | * Main polling routine. |
| 2226 | * This routine is repeatedly called by the WANPIPE 'thread' to allow for |
| 2227 | * time-dependent housekeeping work. |
| 2228 | * |
| 2229 | * Notes: |
| 2230 | * 1. This routine may be called on interrupt context with all interrupts |
| 2231 | * enabled. Beware! |
| 2232 | *====================================================================*/ |
| 2233 | |
| 2234 | static void wpx_poll (sdla_t *card) |
| 2235 | { |
| 2236 | if (!card->wandev.dev){ |
| 2237 | goto wpx_poll_exit; |
| 2238 | } |
| 2239 | |
| 2240 | if (card->open_cnt != card->u.x.num_of_ch){ |
| 2241 | goto wpx_poll_exit; |
| 2242 | } |
| 2243 | |
| 2244 | if (test_bit(PERI_CRIT,&card->wandev.critical)){ |
| 2245 | goto wpx_poll_exit; |
| 2246 | } |
| 2247 | |
| 2248 | if (test_bit(SEND_CRIT,&card->wandev.critical)){ |
| 2249 | goto wpx_poll_exit; |
| 2250 | } |
| 2251 | |
| 2252 | switch(card->wandev.state){ |
| 2253 | case WAN_CONNECTED: |
| 2254 | poll_active(card); |
| 2255 | break; |
| 2256 | |
| 2257 | case WAN_CONNECTING: |
| 2258 | poll_connecting(card); |
| 2259 | break; |
| 2260 | |
| 2261 | case WAN_DISCONNECTED: |
| 2262 | poll_disconnected(card); |
| 2263 | break; |
| 2264 | } |
| 2265 | |
| 2266 | wpx_poll_exit: |
| 2267 | clear_bit(POLL_CRIT,&card->wandev.critical); |
| 2268 | return; |
| 2269 | } |
| 2270 | |
| 2271 | static void trigger_x25_poll(sdla_t *card) |
| 2272 | { |
| 2273 | schedule_work(&card->u.x.x25_poll_work); |
| 2274 | } |
| 2275 | |
| 2276 | /*==================================================================== |
| 2277 | * Handle physical link establishment phase. |
| 2278 | * o if connection timed out, disconnect the link. |
| 2279 | *===================================================================*/ |
| 2280 | |
| 2281 | static void poll_connecting (sdla_t* card) |
| 2282 | { |
| 2283 | volatile TX25Status* status = card->flags; |
| 2284 | |
| 2285 | if (status->gflags & X25_HDLC_ABM){ |
| 2286 | |
| 2287 | timer_intr_exec (card, TMR_INT_ENABLED_POLL_CONNECT_ON); |
| 2288 | |
| 2289 | }else if ((jiffies - card->state_tick) > CONNECT_TIMEOUT){ |
| 2290 | |
| 2291 | timer_intr_exec (card, TMR_INT_ENABLED_POLL_CONNECT_OFF); |
| 2292 | |
| 2293 | } |
| 2294 | } |
| 2295 | |
| 2296 | /*==================================================================== |
| 2297 | * Handle physical link disconnected phase. |
| 2298 | * o if hold-down timeout has expired and there are open interfaces, |
| 2299 | * connect link. |
| 2300 | *===================================================================*/ |
| 2301 | |
| 2302 | static void poll_disconnected (sdla_t* card) |
| 2303 | { |
| 2304 | struct net_device *dev; |
| 2305 | x25_channel_t *chan; |
| 2306 | TX25Status* status = card->flags; |
| 2307 | |
| 2308 | if (!card->u.x.LAPB_hdlc && card->open_cnt && |
| 2309 | ((jiffies - card->state_tick) > HOLD_DOWN_TIME)){ |
| 2310 | timer_intr_exec(card, TMR_INT_ENABLED_POLL_DISCONNECT); |
| 2311 | } |
| 2312 | |
| 2313 | |
| 2314 | if ((dev=card->wandev.dev) == NULL) |
| 2315 | return; |
| 2316 | |
| 2317 | if ((chan=dev->priv) == NULL) |
| 2318 | return; |
| 2319 | |
| 2320 | if (chan->common.usedby == API && |
| 2321 | atomic_read(&chan->common.command) && |
| 2322 | card->u.x.LAPB_hdlc){ |
| 2323 | |
| 2324 | if (!(card->u.x.timer_int_enabled & TMR_INT_ENABLED_CMD_EXEC)) |
| 2325 | card->u.x.timer_int_enabled |= TMR_INT_ENABLED_CMD_EXEC; |
| 2326 | |
| 2327 | if (!(status->imask & INTR_ON_TIMER)) |
| 2328 | status->imask |= INTR_ON_TIMER; |
| 2329 | } |
| 2330 | |
| 2331 | } |
| 2332 | |
| 2333 | /*==================================================================== |
| 2334 | * Handle active link phase. |
| 2335 | * o fetch X.25 asynchronous events. |
| 2336 | * o kick off transmission on all interfaces. |
| 2337 | *===================================================================*/ |
| 2338 | |
| 2339 | static void poll_active (sdla_t* card) |
| 2340 | { |
| 2341 | struct net_device* dev; |
| 2342 | TX25Status* status = card->flags; |
| 2343 | |
| 2344 | for (dev = card->wandev.dev; dev; |
| 2345 | dev = *((struct net_device **)dev->priv)){ |
| 2346 | x25_channel_t* chan = dev->priv; |
| 2347 | |
| 2348 | /* If SVC has been idle long enough, close virtual circuit */ |
| 2349 | if ( chan->common.svc && |
| 2350 | chan->common.state == WAN_CONNECTED && |
| 2351 | chan->common.usedby == WANPIPE ){ |
| 2352 | |
| 2353 | if( (jiffies - chan->i_timeout_sofar) / HZ > chan->idle_timeout ){ |
| 2354 | /* Close svc */ |
| 2355 | card->u.x.poll_device=dev; |
| 2356 | timer_intr_exec (card, TMR_INT_ENABLED_POLL_ACTIVE); |
| 2357 | } |
| 2358 | } |
| 2359 | |
| 2360 | #ifdef PRINT_DEBUG |
| 2361 | chan->ifstats.tx_compressed = atomic_read(&chan->common.command); |
| 2362 | chan->ifstats.tx_errors = chan->common.state; |
| 2363 | chan->ifstats.rx_fifo_errors = atomic_read(&card->u.x.command_busy); |
| 2364 | ++chan->ifstats.tx_bytes; |
| 2365 | |
| 2366 | chan->ifstats.rx_fifo_errors=atomic_read(&chan->common.disconnect); |
| 2367 | chan->ifstats.multicast=atomic_read(&chan->bh_buff_used); |
| 2368 | chan->ifstats.rx_length_errors=*card->u.x.hdlc_buf_status; |
| 2369 | #endif |
| 2370 | |
| 2371 | if (chan->common.usedby == API && |
| 2372 | atomic_read(&chan->common.command) && |
| 2373 | !card->u.x.LAPB_hdlc){ |
| 2374 | |
| 2375 | if (!(card->u.x.timer_int_enabled & TMR_INT_ENABLED_CMD_EXEC)) |
| 2376 | card->u.x.timer_int_enabled |= TMR_INT_ENABLED_CMD_EXEC; |
| 2377 | |
| 2378 | if (!(status->imask & INTR_ON_TIMER)) |
| 2379 | status->imask |= INTR_ON_TIMER; |
| 2380 | } |
| 2381 | |
| 2382 | if ((chan->common.usedby == API) && |
| 2383 | atomic_read(&chan->common.disconnect)){ |
| 2384 | |
| 2385 | if (chan->common.state == WAN_DISCONNECTED){ |
| 2386 | atomic_set(&chan->common.disconnect,0); |
| 2387 | return; |
| 2388 | } |
| 2389 | |
| 2390 | atomic_set(&chan->common.command,X25_CLEAR_CALL); |
| 2391 | if (!(card->u.x.timer_int_enabled & TMR_INT_ENABLED_CMD_EXEC)) |
| 2392 | card->u.x.timer_int_enabled |= TMR_INT_ENABLED_CMD_EXEC; |
| 2393 | |
| 2394 | if (!(status->imask & INTR_ON_TIMER)) |
| 2395 | status->imask |= INTR_ON_TIMER; |
| 2396 | } |
| 2397 | } |
| 2398 | } |
| 2399 | |
| 2400 | static void timer_intr_exec(sdla_t *card, unsigned char TYPE) |
| 2401 | { |
| 2402 | TX25Status* status = card->flags; |
| 2403 | card->u.x.timer_int_enabled |= TYPE; |
| 2404 | if (!(status->imask & INTR_ON_TIMER)) |
| 2405 | status->imask |= INTR_ON_TIMER; |
| 2406 | } |
| 2407 | |
| 2408 | |
| 2409 | /*==================================================================== |
| 2410 | * SDLA Firmware-Specific Functions |
| 2411 | * |
| 2412 | * Almost all X.25 commands can unexpetedly fail due to so called 'X.25 |
| 2413 | * asynchronous events' such as restart, interrupt, incoming call request, |
| 2414 | * call clear request, etc. They can't be ignored and have to be delt with |
| 2415 | * immediately. To tackle with this problem we execute each interface |
| 2416 | * command in a loop until good return code is received or maximum number |
| 2417 | * of retries is reached. Each interface command returns non-zero return |
| 2418 | * code, an asynchronous event/error handler x25_error() is called. |
| 2419 | *====================================================================*/ |
| 2420 | |
| 2421 | /*==================================================================== |
| 2422 | * Read X.25 firmware version. |
| 2423 | * Put code version as ASCII string in str. |
| 2424 | *===================================================================*/ |
| 2425 | |
| 2426 | static int x25_get_version (sdla_t* card, char* str) |
| 2427 | { |
| 2428 | TX25Mbox* mbox = card->mbox; |
| 2429 | int retry = MAX_CMD_RETRY; |
| 2430 | int err; |
| 2431 | |
| 2432 | do |
| 2433 | { |
| 2434 | memset(&mbox->cmd, 0, sizeof(TX25Cmd)); |
| 2435 | mbox->cmd.command = X25_READ_CODE_VERSION; |
| 2436 | err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; |
| 2437 | } while (err && retry-- && |
| 2438 | x25_error(card, err, X25_READ_CODE_VERSION, 0)); |
| 2439 | |
| 2440 | if (!err && str) |
| 2441 | { |
| 2442 | int len = mbox->cmd.length; |
| 2443 | |
| 2444 | memcpy(str, mbox->data, len); |
| 2445 | str[len] = '\0'; |
| 2446 | } |
| 2447 | return err; |
| 2448 | } |
| 2449 | |
| 2450 | /*==================================================================== |
| 2451 | * Configure adapter. |
| 2452 | *===================================================================*/ |
| 2453 | |
| 2454 | static int x25_configure (sdla_t* card, TX25Config* conf) |
| 2455 | { |
| 2456 | TX25Mbox* mbox = card->mbox; |
| 2457 | int retry = MAX_CMD_RETRY; |
| 2458 | int err; |
| 2459 | |
| 2460 | do{ |
| 2461 | memset(&mbox->cmd, 0, sizeof(TX25Cmd)); |
| 2462 | memcpy(mbox->data, (void*)conf, sizeof(TX25Config)); |
| 2463 | mbox->cmd.length = sizeof(TX25Config); |
| 2464 | mbox->cmd.command = X25_SET_CONFIGURATION; |
| 2465 | err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; |
| 2466 | } while (err && retry-- && x25_error(card, err, X25_SET_CONFIGURATION, 0)); |
| 2467 | return err; |
| 2468 | } |
| 2469 | |
| 2470 | /*==================================================================== |
| 2471 | * Configure adapter for HDLC only. |
| 2472 | *===================================================================*/ |
| 2473 | |
| 2474 | static int hdlc_configure (sdla_t* card, TX25Config* conf) |
| 2475 | { |
| 2476 | TX25Mbox* mbox = card->mbox; |
| 2477 | int retry = MAX_CMD_RETRY; |
| 2478 | int err; |
| 2479 | |
| 2480 | do{ |
| 2481 | memset(&mbox->cmd, 0, sizeof(TX25Cmd)); |
| 2482 | memcpy(mbox->data, (void*)conf, sizeof(TX25Config)); |
| 2483 | mbox->cmd.length = sizeof(TX25Config); |
| 2484 | mbox->cmd.command = X25_HDLC_SET_CONFIG; |
| 2485 | err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; |
| 2486 | } while (err && retry-- && x25_error(card, err, X25_SET_CONFIGURATION, 0)); |
| 2487 | |
| 2488 | return err; |
| 2489 | } |
| 2490 | |
| 2491 | static int set_hdlc_level (sdla_t* card) |
| 2492 | { |
| 2493 | |
| 2494 | TX25Mbox* mbox = card->mbox; |
| 2495 | int retry = MAX_CMD_RETRY; |
| 2496 | int err; |
| 2497 | |
| 2498 | do{ |
| 2499 | memset(&mbox->cmd, 0, sizeof(TX25Cmd)); |
| 2500 | mbox->cmd.command = SET_PROTOCOL_LEVEL; |
| 2501 | mbox->cmd.length = 1; |
| 2502 | mbox->data[0] = HDLC_LEVEL; //| DO_HDLC_LEVEL_ERROR_CHECKING; |
| 2503 | err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; |
| 2504 | } while (err && retry-- && x25_error(card, err, SET_PROTOCOL_LEVEL, 0)); |
| 2505 | |
| 2506 | return err; |
| 2507 | } |
| 2508 | |
| 2509 | |
| 2510 | |
| 2511 | /*==================================================================== |
| 2512 | * Get communications error statistics. |
| 2513 | *====================================================================*/ |
| 2514 | |
| 2515 | static int x25_get_err_stats (sdla_t* card) |
| 2516 | { |
| 2517 | TX25Mbox* mbox = card->mbox; |
| 2518 | int retry = MAX_CMD_RETRY; |
| 2519 | int err; |
| 2520 | |
| 2521 | do |
| 2522 | { |
| 2523 | memset(&mbox->cmd, 0, sizeof(TX25Cmd)); |
| 2524 | mbox->cmd.command = X25_HDLC_READ_COMM_ERR; |
| 2525 | err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; |
| 2526 | } while (err && retry-- && x25_error(card, err, X25_HDLC_READ_COMM_ERR, 0)); |
| 2527 | |
| 2528 | if (!err) |
| 2529 | { |
| 2530 | THdlcCommErr* stats = (void*)mbox->data; |
| 2531 | |
| 2532 | card->wandev.stats.rx_over_errors = stats->rxOverrun; |
| 2533 | card->wandev.stats.rx_crc_errors = stats->rxBadCrc; |
| 2534 | card->wandev.stats.rx_missed_errors = stats->rxAborted; |
| 2535 | card->wandev.stats.tx_aborted_errors = stats->txAborted; |
| 2536 | } |
| 2537 | return err; |
| 2538 | } |
| 2539 | |
| 2540 | /*==================================================================== |
| 2541 | * Get protocol statistics. |
| 2542 | *===================================================================*/ |
| 2543 | |
| 2544 | static int x25_get_stats (sdla_t* card) |
| 2545 | { |
| 2546 | TX25Mbox* mbox = card->mbox; |
| 2547 | int retry = MAX_CMD_RETRY; |
| 2548 | int err; |
| 2549 | |
| 2550 | do |
| 2551 | { |
| 2552 | memset(&mbox->cmd, 0, sizeof(TX25Cmd)); |
| 2553 | mbox->cmd.command = X25_READ_STATISTICS; |
| 2554 | err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; |
| 2555 | } while (err && retry-- && x25_error(card, err, X25_READ_STATISTICS, 0)) ; |
| 2556 | |
| 2557 | if (!err) |
| 2558 | { |
| 2559 | TX25Stats* stats = (void*)mbox->data; |
| 2560 | |
| 2561 | card->wandev.stats.rx_packets = stats->rxData; |
| 2562 | card->wandev.stats.tx_packets = stats->txData; |
| 2563 | } |
| 2564 | return err; |
| 2565 | } |
| 2566 | |
| 2567 | /*==================================================================== |
| 2568 | * Close HDLC link. |
| 2569 | *===================================================================*/ |
| 2570 | |
| 2571 | static int x25_close_hdlc (sdla_t* card) |
| 2572 | { |
| 2573 | TX25Mbox* mbox = card->mbox; |
| 2574 | int retry = MAX_CMD_RETRY; |
| 2575 | int err; |
| 2576 | |
| 2577 | do |
| 2578 | { |
| 2579 | memset(&mbox->cmd, 0, sizeof(TX25Cmd)); |
| 2580 | mbox->cmd.command = X25_HDLC_LINK_CLOSE; |
| 2581 | err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; |
| 2582 | } while (err && retry-- && x25_error(card, err, X25_HDLC_LINK_CLOSE, 0)); |
| 2583 | |
| 2584 | return err; |
| 2585 | } |
| 2586 | |
| 2587 | |
| 2588 | /*==================================================================== |
| 2589 | * Open HDLC link. |
| 2590 | *===================================================================*/ |
| 2591 | |
| 2592 | static int x25_open_hdlc (sdla_t* card) |
| 2593 | { |
| 2594 | TX25Mbox* mbox = card->mbox; |
| 2595 | int retry = MAX_CMD_RETRY; |
| 2596 | int err; |
| 2597 | |
| 2598 | do |
| 2599 | { |
| 2600 | memset(&mbox->cmd, 0, sizeof(TX25Cmd)); |
| 2601 | mbox->cmd.command = X25_HDLC_LINK_OPEN; |
| 2602 | err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; |
| 2603 | } while (err && retry-- && x25_error(card, err, X25_HDLC_LINK_OPEN, 0)); |
| 2604 | |
| 2605 | return err; |
| 2606 | } |
| 2607 | |
| 2608 | /*===================================================================== |
| 2609 | * Setup HDLC link. |
| 2610 | *====================================================================*/ |
| 2611 | static int x25_setup_hdlc (sdla_t* card) |
| 2612 | { |
| 2613 | TX25Mbox* mbox = card->mbox; |
| 2614 | int retry = MAX_CMD_RETRY; |
| 2615 | int err; |
| 2616 | |
| 2617 | do |
| 2618 | { |
| 2619 | memset(&mbox->cmd, 0, sizeof(TX25Cmd)); |
| 2620 | mbox->cmd.command = X25_HDLC_LINK_SETUP; |
| 2621 | err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; |
| 2622 | } while (err && retry-- && x25_error(card, err, X25_HDLC_LINK_SETUP, 0)); |
| 2623 | |
| 2624 | return err; |
| 2625 | } |
| 2626 | |
| 2627 | /*==================================================================== |
| 2628 | * Set (raise/drop) DTR. |
| 2629 | *===================================================================*/ |
| 2630 | |
| 2631 | static int x25_set_dtr (sdla_t* card, int dtr) |
| 2632 | { |
| 2633 | TX25Mbox* mbox = card->mbox; |
| 2634 | int retry = MAX_CMD_RETRY; |
| 2635 | int err; |
| 2636 | |
| 2637 | do |
| 2638 | { |
| 2639 | memset(&mbox->cmd, 0, sizeof(TX25Cmd)); |
| 2640 | mbox->data[0] = 0; |
| 2641 | mbox->data[2] = 0; |
| 2642 | mbox->data[1] = dtr ? 0x02 : 0x01; |
| 2643 | mbox->cmd.length = 3; |
| 2644 | mbox->cmd.command = X25_SET_GLOBAL_VARS; |
| 2645 | err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; |
| 2646 | } while (err && retry-- && x25_error(card, err, X25_SET_GLOBAL_VARS, 0)); |
| 2647 | |
| 2648 | return err; |
| 2649 | } |
| 2650 | |
| 2651 | /*==================================================================== |
| 2652 | * Set interrupt mode. |
| 2653 | *===================================================================*/ |
| 2654 | |
| 2655 | static int x25_set_intr_mode (sdla_t* card, int mode) |
| 2656 | { |
| 2657 | TX25Mbox* mbox = card->mbox; |
| 2658 | int retry = MAX_CMD_RETRY; |
| 2659 | int err; |
| 2660 | |
| 2661 | do |
| 2662 | { |
| 2663 | memset(&mbox->cmd, 0, sizeof(TX25Cmd)); |
| 2664 | mbox->data[0] = mode; |
| 2665 | if (card->hw.fwid == SFID_X25_508){ |
| 2666 | mbox->data[1] = card->hw.irq; |
| 2667 | mbox->data[2] = 2; |
| 2668 | mbox->cmd.length = 3; |
| 2669 | }else { |
| 2670 | mbox->cmd.length = 1; |
| 2671 | } |
| 2672 | mbox->cmd.command = X25_SET_INTERRUPT_MODE; |
| 2673 | err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; |
| 2674 | } while (err && retry-- && x25_error(card, err, X25_SET_INTERRUPT_MODE, 0)); |
| 2675 | |
| 2676 | return err; |
| 2677 | } |
| 2678 | |
| 2679 | /*==================================================================== |
| 2680 | * Read X.25 channel configuration. |
| 2681 | *===================================================================*/ |
| 2682 | |
| 2683 | static int x25_get_chan_conf (sdla_t* card, x25_channel_t* chan) |
| 2684 | { |
| 2685 | TX25Mbox* mbox = card->mbox; |
| 2686 | int retry = MAX_CMD_RETRY; |
| 2687 | int lcn = chan->common.lcn; |
| 2688 | int err; |
| 2689 | |
| 2690 | do{ |
| 2691 | memset(&mbox->cmd, 0, sizeof(TX25Cmd)); |
| 2692 | mbox->cmd.lcn = lcn; |
| 2693 | mbox->cmd.command = X25_READ_CHANNEL_CONFIG; |
| 2694 | err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; |
| 2695 | } while (err && retry-- && x25_error(card, err, X25_READ_CHANNEL_CONFIG, lcn)); |
| 2696 | |
| 2697 | if (!err) |
| 2698 | { |
| 2699 | TX25Status* status = card->flags; |
| 2700 | |
| 2701 | /* calculate an offset into the array of status bytes */ |
| 2702 | if (card->u.x.hi_svc <= X25_MAX_CHAN){ |
| 2703 | |
| 2704 | chan->ch_idx = lcn - 1; |
| 2705 | |
| 2706 | }else{ |
| 2707 | int offset; |
| 2708 | |
| 2709 | /* FIX: Apr 14 2000 : Nenad Corbic |
| 2710 | * The data field was being compared to 0x1F using |
| 2711 | * '&&' instead of '&'. |
| 2712 | * This caused X25API to fail for LCNs greater than 255. |
| 2713 | */ |
| 2714 | switch (mbox->data[0] & 0x1F) |
| 2715 | { |
| 2716 | case 0x01: |
| 2717 | offset = status->pvc_map; break; |
| 2718 | case 0x03: |
| 2719 | offset = status->icc_map; break; |
| 2720 | case 0x07: |
| 2721 | offset = status->twc_map; break; |
| 2722 | case 0x0B: |
| 2723 | offset = status->ogc_map; break; |
| 2724 | default: |
| 2725 | offset = 0; |
| 2726 | } |
| 2727 | chan->ch_idx = lcn - 1 - offset; |
| 2728 | } |
| 2729 | |
| 2730 | /* get actual transmit packet size on this channel */ |
| 2731 | switch(mbox->data[1] & 0x38) |
| 2732 | { |
| 2733 | case 0x00: |
| 2734 | chan->tx_pkt_size = 16; |
| 2735 | break; |
| 2736 | case 0x08: |
| 2737 | chan->tx_pkt_size = 32; |
| 2738 | break; |
| 2739 | case 0x10: |
| 2740 | chan->tx_pkt_size = 64; |
| 2741 | break; |
| 2742 | case 0x18: |
| 2743 | chan->tx_pkt_size = 128; |
| 2744 | break; |
| 2745 | case 0x20: |
| 2746 | chan->tx_pkt_size = 256; |
| 2747 | break; |
| 2748 | case 0x28: |
| 2749 | chan->tx_pkt_size = 512; |
| 2750 | break; |
| 2751 | case 0x30: |
| 2752 | chan->tx_pkt_size = 1024; |
| 2753 | break; |
| 2754 | } |
| 2755 | if (card->u.x.logging) |
| 2756 | printk(KERN_INFO "%s: X.25 packet size on LCN %d is %d.\n", |
| 2757 | card->devname, lcn, chan->tx_pkt_size); |
| 2758 | } |
| 2759 | return err; |
| 2760 | } |
| 2761 | |
| 2762 | /*==================================================================== |
| 2763 | * Place X.25 call. |
| 2764 | *====================================================================*/ |
| 2765 | |
| 2766 | static int x25_place_call (sdla_t* card, x25_channel_t* chan) |
| 2767 | { |
| 2768 | TX25Mbox* mbox = card->mbox; |
| 2769 | int retry = MAX_CMD_RETRY; |
| 2770 | int err; |
| 2771 | char str[64]; |
| 2772 | |
| 2773 | |
| 2774 | if (chan->protocol == htons(ETH_P_IP)){ |
| 2775 | sprintf(str, "-d%s -uCC", chan->addr); |
| 2776 | |
| 2777 | }else if (chan->protocol == htons(ETH_P_IPX)){ |
| 2778 | sprintf(str, "-d%s -u800000008137", chan->addr); |
| 2779 | |
| 2780 | } |
| 2781 | |
| 2782 | do |
| 2783 | { |
| 2784 | memset(&mbox->cmd, 0, sizeof(TX25Cmd)); |
| 2785 | strcpy(mbox->data, str); |
| 2786 | mbox->cmd.length = strlen(str); |
| 2787 | mbox->cmd.command = X25_PLACE_CALL; |
| 2788 | err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; |
| 2789 | } while (err && retry-- && x25_error(card, err, X25_PLACE_CALL, 0)); |
| 2790 | |
| 2791 | if (!err){ |
| 2792 | bind_lcn_to_dev (card, chan->dev, mbox->cmd.lcn); |
| 2793 | } |
| 2794 | return err; |
| 2795 | } |
| 2796 | |
| 2797 | /*==================================================================== |
| 2798 | * Accept X.25 call. |
| 2799 | *====================================================================*/ |
| 2800 | |
| 2801 | static int x25_accept_call (sdla_t* card, int lcn, int qdm) |
| 2802 | { |
| 2803 | TX25Mbox* mbox = card->mbox; |
| 2804 | int retry = MAX_CMD_RETRY; |
| 2805 | int err; |
| 2806 | |
| 2807 | do |
| 2808 | { |
| 2809 | memset(&mbox->cmd, 0, sizeof(TX25Cmd)); |
| 2810 | mbox->cmd.lcn = lcn; |
| 2811 | mbox->cmd.qdm = qdm; |
| 2812 | mbox->cmd.command = X25_ACCEPT_CALL; |
| 2813 | err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; |
| 2814 | } while (err && retry-- && x25_error(card, err, X25_ACCEPT_CALL, lcn)); |
| 2815 | |
| 2816 | return err; |
| 2817 | } |
| 2818 | |
| 2819 | /*==================================================================== |
| 2820 | * Clear X.25 call. |
| 2821 | *====================================================================*/ |
| 2822 | |
| 2823 | static int x25_clear_call (sdla_t* card, int lcn, int cause, int diagn) |
| 2824 | { |
| 2825 | TX25Mbox* mbox = card->mbox; |
| 2826 | int retry = MAX_CMD_RETRY; |
| 2827 | int err; |
| 2828 | |
| 2829 | do |
| 2830 | { |
| 2831 | memset(&mbox->cmd, 0, sizeof(TX25Cmd)); |
| 2832 | mbox->cmd.lcn = lcn; |
| 2833 | mbox->cmd.cause = cause; |
| 2834 | mbox->cmd.diagn = diagn; |
| 2835 | mbox->cmd.command = X25_CLEAR_CALL; |
| 2836 | err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; |
| 2837 | } while (err && retry-- && x25_error(card, err, X25_CLEAR_CALL, lcn)); |
| 2838 | |
| 2839 | return err; |
| 2840 | } |
| 2841 | |
| 2842 | /*==================================================================== |
| 2843 | * Send X.25 data packet. |
| 2844 | *====================================================================*/ |
| 2845 | |
| 2846 | static int x25_send (sdla_t* card, int lcn, int qdm, int len, void* buf) |
| 2847 | { |
| 2848 | TX25Mbox* mbox = card->mbox; |
| 2849 | int retry = MAX_CMD_RETRY; |
| 2850 | int err; |
| 2851 | unsigned char cmd; |
| 2852 | |
| 2853 | if (card->u.x.LAPB_hdlc) |
| 2854 | cmd = X25_HDLC_WRITE; |
| 2855 | else |
| 2856 | cmd = X25_WRITE; |
| 2857 | |
| 2858 | do |
| 2859 | { |
| 2860 | memset(&mbox->cmd, 0, sizeof(TX25Cmd)); |
| 2861 | memcpy(mbox->data, buf, len); |
| 2862 | mbox->cmd.length = len; |
| 2863 | mbox->cmd.lcn = lcn; |
| 2864 | |
| 2865 | if (card->u.x.LAPB_hdlc){ |
| 2866 | mbox->cmd.pf = qdm; |
| 2867 | }else{ |
| 2868 | mbox->cmd.qdm = qdm; |
| 2869 | } |
| 2870 | |
| 2871 | mbox->cmd.command = cmd; |
| 2872 | err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; |
| 2873 | } while (err && retry-- && x25_error(card, err, cmd , lcn)); |
| 2874 | |
| 2875 | |
| 2876 | /* If buffers are busy the return code for LAPB HDLC is |
| 2877 | * 1. The above functions are looking for return code |
| 2878 | * of X25RES_NOT_READY if busy. */ |
| 2879 | |
| 2880 | if (card->u.x.LAPB_hdlc && err == 1){ |
| 2881 | err = X25RES_NOT_READY; |
| 2882 | } |
| 2883 | |
| 2884 | return err; |
| 2885 | } |
| 2886 | |
| 2887 | /*==================================================================== |
| 2888 | * Fetch X.25 asynchronous events. |
| 2889 | *===================================================================*/ |
| 2890 | |
| 2891 | static int x25_fetch_events (sdla_t* card) |
| 2892 | { |
| 2893 | TX25Status* status = card->flags; |
| 2894 | TX25Mbox* mbox = card->mbox; |
| 2895 | int err = 0; |
| 2896 | |
| 2897 | if (status->gflags & 0x20) |
| 2898 | { |
| 2899 | memset(&mbox->cmd, 0, sizeof(TX25Cmd)); |
| 2900 | mbox->cmd.command = X25_IS_DATA_AVAILABLE; |
| 2901 | err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; |
| 2902 | if (err) x25_error(card, err, X25_IS_DATA_AVAILABLE, 0); |
| 2903 | } |
| 2904 | return err; |
| 2905 | } |
| 2906 | |
| 2907 | /*==================================================================== |
| 2908 | * X.25 asynchronous event/error handler. |
| 2909 | * This routine is called each time interface command returns |
| 2910 | * non-zero return code to handle X.25 asynchronous events and |
| 2911 | * common errors. Return non-zero to repeat command or zero to |
| 2912 | * cancel it. |
| 2913 | * |
| 2914 | * Notes: |
| 2915 | * 1. This function may be called recursively, as handling some of the |
| 2916 | * asynchronous events (e.g. call request) requires execution of the |
| 2917 | * interface command(s) that, in turn, may also return asynchronous |
| 2918 | * events. To avoid re-entrancy problems we copy mailbox to dynamically |
| 2919 | * allocated memory before processing events. |
| 2920 | *====================================================================*/ |
| 2921 | |
| 2922 | static int x25_error (sdla_t* card, int err, int cmd, int lcn) |
| 2923 | { |
| 2924 | int retry = 1; |
| 2925 | unsigned dlen = ((TX25Mbox*)card->mbox)->cmd.length; |
| 2926 | TX25Mbox* mb; |
| 2927 | |
| 2928 | mb = kmalloc(sizeof(TX25Mbox) + dlen, GFP_ATOMIC); |
| 2929 | if (mb == NULL) |
| 2930 | { |
| 2931 | printk(KERN_ERR "%s: x25_error() out of memory!\n", |
| 2932 | card->devname); |
| 2933 | return 0; |
| 2934 | } |
| 2935 | memcpy(mb, card->mbox, sizeof(TX25Mbox) + dlen); |
| 2936 | switch (err){ |
| 2937 | |
| 2938 | case X25RES_ASYNC_PACKET: /* X.25 asynchronous packet was received */ |
| 2939 | |
| 2940 | mb->data[dlen] = '\0'; |
| 2941 | |
| 2942 | switch (mb->cmd.pktType & 0x7F){ |
| 2943 | |
| 2944 | case ASE_CALL_RQST: /* incoming call */ |
| 2945 | retry = incoming_call(card, cmd, lcn, mb); |
| 2946 | break; |
| 2947 | |
| 2948 | case ASE_CALL_ACCEPTED: /* connected */ |
| 2949 | retry = call_accepted(card, cmd, lcn, mb); |
| 2950 | break; |
| 2951 | |
| 2952 | case ASE_CLEAR_RQST: /* call clear request */ |
| 2953 | retry = call_cleared(card, cmd, lcn, mb); |
| 2954 | break; |
| 2955 | |
| 2956 | case ASE_RESET_RQST: /* reset request */ |
| 2957 | printk(KERN_INFO "%s: X.25 reset request on LCN %d! " |
| 2958 | "Cause:0x%02X Diagn:0x%02X\n", |
| 2959 | card->devname, mb->cmd.lcn, mb->cmd.cause, |
| 2960 | mb->cmd.diagn); |
| 2961 | api_oob_event (card,mb); |
| 2962 | break; |
| 2963 | |
| 2964 | case ASE_RESTART_RQST: /* restart request */ |
| 2965 | retry = restart_event(card, cmd, lcn, mb); |
| 2966 | break; |
| 2967 | |
| 2968 | case ASE_CLEAR_CONFRM: |
| 2969 | if (clear_confirm_event (card,mb)) |
| 2970 | break; |
| 2971 | |
| 2972 | /* I use the goto statement here so if |
| 2973 | * somebody inserts code between the |
| 2974 | * case and default, we will not have |
| 2975 | * ghost problems */ |
| 2976 | |
| 2977 | goto dflt_1; |
| 2978 | |
| 2979 | default: |
| 2980 | dflt_1: |
| 2981 | printk(KERN_INFO "%s: X.25 event 0x%02X on LCN %d! " |
| 2982 | "Cause:0x%02X Diagn:0x%02X\n", |
| 2983 | card->devname, mb->cmd.pktType, |
| 2984 | mb->cmd.lcn, mb->cmd.cause, mb->cmd.diagn); |
| 2985 | } |
| 2986 | break; |
| 2987 | |
| 2988 | case X25RES_PROTO_VIOLATION: /* X.25 protocol violation indication */ |
| 2989 | |
| 2990 | /* Bug Fix: Mar 14 2000 |
| 2991 | * The Protocol violation error conditions were |
| 2992 | * not handled previously */ |
| 2993 | |
| 2994 | switch (mb->cmd.pktType & 0x7F){ |
| 2995 | |
| 2996 | case PVE_CLEAR_RQST: /* Clear request */ |
| 2997 | retry = call_cleared(card, cmd, lcn, mb); |
| 2998 | break; |
| 2999 | |
| 3000 | case PVE_RESET_RQST: /* Reset request */ |
| 3001 | printk(KERN_INFO "%s: X.25 reset request on LCN %d! " |
| 3002 | "Cause:0x%02X Diagn:0x%02X\n", |
| 3003 | card->devname, mb->cmd.lcn, mb->cmd.cause, |
| 3004 | mb->cmd.diagn); |
| 3005 | api_oob_event (card,mb); |
| 3006 | break; |
| 3007 | |
| 3008 | case PVE_RESTART_RQST: /* Restart request */ |
| 3009 | retry = restart_event(card, cmd, lcn, mb); |
| 3010 | break; |
| 3011 | |
| 3012 | default : |
| 3013 | printk(KERN_INFO |
| 3014 | "%s: X.25 protocol violation on LCN %d! " |
| 3015 | "Packet:0x%02X Cause:0x%02X Diagn:0x%02X\n", |
| 3016 | card->devname, mb->cmd.lcn, |
| 3017 | mb->cmd.pktType & 0x7F, mb->cmd.cause, mb->cmd.diagn); |
| 3018 | api_oob_event(card,mb); |
| 3019 | } |
| 3020 | break; |
| 3021 | |
| 3022 | case 0x42: /* X.25 timeout */ |
| 3023 | retry = timeout_event(card, cmd, lcn, mb); |
| 3024 | break; |
| 3025 | |
| 3026 | case 0x43: /* X.25 retry limit exceeded */ |
| 3027 | printk(KERN_INFO |
| 3028 | "%s: exceeded X.25 retry limit on LCN %d! " |
| 3029 | "Packet:0x%02X Diagn:0x%02X\n", card->devname, |
| 3030 | mb->cmd.lcn, mb->cmd.pktType, mb->cmd.diagn) |
| 3031 | ; |
| 3032 | break; |
| 3033 | |
| 3034 | case 0x08: /* modem failure */ |
| 3035 | #ifndef MODEM_NOT_LOG |
| 3036 | printk(KERN_INFO "%s: modem failure!\n", card->devname); |
| 3037 | #endif /* MODEM_NOT_LOG */ |
| 3038 | api_oob_event(card,mb); |
| 3039 | break; |
| 3040 | |
| 3041 | case 0x09: /* N2 retry limit */ |
| 3042 | printk(KERN_INFO "%s: exceeded HDLC retry limit!\n", |
| 3043 | card->devname); |
| 3044 | api_oob_event(card,mb); |
| 3045 | break; |
| 3046 | |
| 3047 | case 0x06: /* unnumbered frame was received while in ABM */ |
| 3048 | printk(KERN_INFO "%s: received Unnumbered frame 0x%02X!\n", |
| 3049 | card->devname, mb->data[0]); |
| 3050 | api_oob_event(card,mb); |
| 3051 | break; |
| 3052 | |
| 3053 | case CMD_TIMEOUT: |
| 3054 | printk(KERN_ERR "%s: command 0x%02X timed out!\n", |
| 3055 | card->devname, cmd) |
| 3056 | ; |
| 3057 | retry = 0; /* abort command */ |
| 3058 | break; |
| 3059 | |
| 3060 | case X25RES_NOT_READY: |
| 3061 | retry = 1; |
| 3062 | break; |
| 3063 | |
| 3064 | case 0x01: |
| 3065 | if (card->u.x.LAPB_hdlc) |
| 3066 | break; |
| 3067 | |
| 3068 | if (mb->cmd.command == 0x16) |
| 3069 | break; |
| 3070 | /* I use the goto statement here so if |
| 3071 | * somebody inserts code between the |
| 3072 | * case and default, we will not have |
| 3073 | * ghost problems */ |
| 3074 | goto dflt_2; |
| 3075 | |
| 3076 | default: |
| 3077 | dflt_2: |
| 3078 | printk(KERN_INFO "%s: command 0x%02X returned 0x%02X! Lcn %i\n", |
| 3079 | card->devname, cmd, err, mb->cmd.lcn) |
| 3080 | ; |
| 3081 | retry = 0; /* abort command */ |
| 3082 | } |
| 3083 | kfree(mb); |
| 3084 | return retry; |
| 3085 | } |
| 3086 | |
| 3087 | /*==================================================================== |
| 3088 | * X.25 Asynchronous Event Handlers |
| 3089 | * These functions are called by the x25_error() and should return 0, if |
| 3090 | * the command resulting in the asynchronous event must be aborted. |
| 3091 | *====================================================================*/ |
| 3092 | |
| 3093 | |
| 3094 | |
| 3095 | /*==================================================================== |
| 3096 | *Handle X.25 incoming call request. |
| 3097 | * RFC 1356 establishes the following rules: |
| 3098 | * 1. The first octet in the Call User Data (CUD) field of the call |
| 3099 | * request packet contains NLPID identifying protocol encapsulation |
| 3100 | * 2. Calls MUST NOT be accepted unless router supports requested |
| 3101 | * protocol encapsulation. |
| 3102 | * 3. A diagnostic code 249 defined by ISO/IEC 8208 may be used |
| 3103 | * when clearing a call because protocol encapsulation is not |
| 3104 | * supported. |
| 3105 | * 4. If an incoming call is received while a call request is |
| 3106 | * pending (i.e. call collision has occurred), the incoming call |
| 3107 | * shall be rejected and call request shall be retried. |
| 3108 | *====================================================================*/ |
| 3109 | |
| 3110 | static int incoming_call (sdla_t* card, int cmd, int lcn, TX25Mbox* mb) |
| 3111 | { |
| 3112 | struct wan_device* wandev = &card->wandev; |
| 3113 | int new_lcn = mb->cmd.lcn; |
| 3114 | struct net_device* dev = get_dev_by_lcn(wandev, new_lcn); |
| 3115 | x25_channel_t* chan = NULL; |
| 3116 | int accept = 0; /* set to '1' if o.k. to accept call */ |
| 3117 | unsigned int user_data; |
| 3118 | x25_call_info_t* info; |
| 3119 | |
| 3120 | /* Make sure there is no call collision */ |
| 3121 | if (dev != NULL) |
| 3122 | { |
| 3123 | printk(KERN_INFO |
| 3124 | "%s: X.25 incoming call collision on LCN %d!\n", |
| 3125 | card->devname, new_lcn); |
| 3126 | |
| 3127 | x25_clear_call(card, new_lcn, 0, 0); |
| 3128 | return 1; |
| 3129 | } |
| 3130 | |
| 3131 | /* Make sure D bit is not set in call request */ |
| 3132 | //FIXME: THIS IS NOT TURE !!!! TAKE IT OUT |
| 3133 | // if (mb->cmd.qdm & 0x02) |
| 3134 | // { |
| 3135 | // printk(KERN_INFO |
| 3136 | // "%s: X.25 incoming call on LCN %d with D-bit set!\n", |
| 3137 | // card->devname, new_lcn); |
| 3138 | // |
| 3139 | // x25_clear_call(card, new_lcn, 0, 0); |
| 3140 | // return 1; |
| 3141 | // } |
| 3142 | |
| 3143 | /* Parse call request data */ |
| 3144 | info = kmalloc(sizeof(x25_call_info_t), GFP_ATOMIC); |
| 3145 | if (info == NULL) |
| 3146 | { |
| 3147 | printk(KERN_ERR |
| 3148 | "%s: not enough memory to parse X.25 incoming call " |
| 3149 | "on LCN %d!\n", card->devname, new_lcn); |
| 3150 | x25_clear_call(card, new_lcn, 0, 0); |
| 3151 | return 1; |
| 3152 | } |
| 3153 | |
| 3154 | parse_call_info(mb->data, info); |
| 3155 | |
| 3156 | if (card->u.x.logging) |
| 3157 | printk(KERN_INFO "\n%s: X.25 incoming call on LCN %d!\n", |
| 3158 | card->devname, new_lcn); |
| 3159 | |
| 3160 | /* Conver the first two ASCII characters into an |
| 3161 | * interger. Used to check the incoming protocol |
| 3162 | */ |
| 3163 | user_data = hex_to_uint(info->user,2); |
| 3164 | |
| 3165 | /* Find available channel */ |
| 3166 | for (dev = wandev->dev; dev; dev = *((struct net_device **)dev->priv)) { |
| 3167 | chan = dev->priv; |
| 3168 | |
| 3169 | if (chan->common.usedby == API) |
| 3170 | continue; |
| 3171 | |
| 3172 | if (!chan->common.svc || (chan->common.state != WAN_DISCONNECTED)) |
| 3173 | continue; |
| 3174 | |
| 3175 | if (user_data == NLPID_IP && chan->protocol != htons(ETH_P_IP)){ |
| 3176 | printk(KERN_INFO "IP packet but configured for IPX : %x, %x\n", |
| 3177 | htons(chan->protocol), info->user[0]); |
| 3178 | continue; |
| 3179 | } |
| 3180 | |
| 3181 | if (user_data == NLPID_SNAP && chan->protocol != htons(ETH_P_IPX)){ |
| 3182 | printk(KERN_INFO "IPX packet but configured for IP: %x\n", |
| 3183 | htons(chan->protocol)); |
| 3184 | continue; |
| 3185 | } |
| 3186 | if (strcmp(info->src, chan->addr) == 0) |
| 3187 | break; |
| 3188 | |
| 3189 | /* If just an '@' is specified, accept all incoming calls */ |
| 3190 | if (strcmp(chan->addr, "") == 0) |
| 3191 | break; |
| 3192 | } |
| 3193 | |
| 3194 | if (dev == NULL){ |
| 3195 | |
| 3196 | /* If the call is not for any WANPIPE interfaces |
| 3197 | * check to see if there is an API listening queue |
| 3198 | * waiting for data. If there is send the packet |
| 3199 | * up the stack. |
| 3200 | */ |
| 3201 | if (card->sk != NULL && card->func != NULL){ |
| 3202 | if (api_incoming_call(card,mb,new_lcn)){ |
| 3203 | x25_clear_call(card, new_lcn, 0, 0); |
| 3204 | } |
| 3205 | accept = 0; |
| 3206 | }else{ |
| 3207 | printk(KERN_INFO "%s: no channels available!\n", |
| 3208 | card->devname); |
| 3209 | |
| 3210 | x25_clear_call(card, new_lcn, 0, 0); |
| 3211 | } |
| 3212 | |
| 3213 | }else if (info->nuser == 0){ |
| 3214 | |
| 3215 | printk(KERN_INFO |
| 3216 | "%s: no user data in incoming call on LCN %d!\n", |
| 3217 | card->devname, new_lcn) |
| 3218 | ; |
| 3219 | x25_clear_call(card, new_lcn, 0, 0); |
| 3220 | |
| 3221 | }else switch (info->user[0]){ |
| 3222 | |
| 3223 | case 0: /* multiplexed */ |
| 3224 | chan->protocol = htons(0); |
| 3225 | accept = 1; |
| 3226 | break; |
| 3227 | |
| 3228 | case NLPID_IP: /* IP datagrams */ |
| 3229 | accept = 1; |
| 3230 | break; |
| 3231 | |
| 3232 | case NLPID_SNAP: /* IPX datagrams */ |
| 3233 | accept = 1; |
| 3234 | break; |
| 3235 | |
| 3236 | default: |
| 3237 | printk(KERN_INFO |
| 3238 | "%s: unsupported NLPID 0x%02X in incoming call " |
| 3239 | "on LCN %d!\n", card->devname, info->user[0], new_lcn); |
| 3240 | x25_clear_call(card, new_lcn, 0, 249); |
| 3241 | } |
| 3242 | |
| 3243 | if (accept && (x25_accept_call(card, new_lcn, 0) == CMD_OK)){ |
| 3244 | |
| 3245 | bind_lcn_to_dev (card, chan->dev, new_lcn); |
| 3246 | |
| 3247 | if (x25_get_chan_conf(card, chan) == CMD_OK) |
| 3248 | set_chan_state(dev, WAN_CONNECTED); |
| 3249 | else |
| 3250 | x25_clear_call(card, new_lcn, 0, 0); |
| 3251 | } |
| 3252 | kfree(info); |
| 3253 | return 1; |
| 3254 | } |
| 3255 | |
| 3256 | /*==================================================================== |
| 3257 | * Handle accepted call. |
| 3258 | *====================================================================*/ |
| 3259 | |
| 3260 | static int call_accepted (sdla_t* card, int cmd, int lcn, TX25Mbox* mb) |
| 3261 | { |
| 3262 | unsigned new_lcn = mb->cmd.lcn; |
| 3263 | struct net_device* dev = find_channel(card, new_lcn); |
| 3264 | x25_channel_t* chan; |
| 3265 | |
| 3266 | if (dev == NULL){ |
| 3267 | printk(KERN_INFO |
| 3268 | "%s: clearing orphaned connection on LCN %d!\n", |
| 3269 | card->devname, new_lcn); |
| 3270 | x25_clear_call(card, new_lcn, 0, 0); |
| 3271 | return 1; |
| 3272 | } |
| 3273 | |
| 3274 | if (card->u.x.logging) |
| 3275 | printk(KERN_INFO "%s: X.25 call accepted on Dev %s and LCN %d!\n", |
| 3276 | card->devname, dev->name, new_lcn); |
| 3277 | |
| 3278 | /* Get channel configuration and notify router */ |
| 3279 | chan = dev->priv; |
| 3280 | if (x25_get_chan_conf(card, chan) != CMD_OK) |
| 3281 | { |
| 3282 | x25_clear_call(card, new_lcn, 0, 0); |
| 3283 | return 1; |
| 3284 | } |
| 3285 | |
| 3286 | set_chan_state(dev, WAN_CONNECTED); |
| 3287 | |
| 3288 | if (chan->common.usedby == API){ |
| 3289 | send_delayed_cmd_result(card,dev,mb); |
| 3290 | bind_lcn_to_dev (card, dev, new_lcn); |
| 3291 | } |
| 3292 | |
| 3293 | return 1; |
| 3294 | } |
| 3295 | |
| 3296 | /*==================================================================== |
| 3297 | * Handle cleared call. |
| 3298 | *====================================================================*/ |
| 3299 | |
| 3300 | static int call_cleared (sdla_t* card, int cmd, int lcn, TX25Mbox* mb) |
| 3301 | { |
| 3302 | unsigned new_lcn = mb->cmd.lcn; |
| 3303 | struct net_device* dev = find_channel(card, new_lcn); |
| 3304 | x25_channel_t *chan; |
| 3305 | unsigned char old_state; |
| 3306 | |
| 3307 | if (card->u.x.logging){ |
| 3308 | printk(KERN_INFO "%s: X.25 clear request on LCN %d! Cause:0x%02X " |
| 3309 | "Diagn:0x%02X\n", |
| 3310 | card->devname, new_lcn, mb->cmd.cause, mb->cmd.diagn); |
| 3311 | } |
| 3312 | |
| 3313 | if (dev == NULL){ |
| 3314 | printk(KERN_INFO "%s: X.25 clear request : No device for clear\n", |
| 3315 | card->devname); |
| 3316 | return 1; |
| 3317 | } |
| 3318 | |
| 3319 | chan=dev->priv; |
| 3320 | |
| 3321 | old_state = chan->common.state; |
| 3322 | |
| 3323 | set_chan_state(dev, WAN_DISCONNECTED); |
| 3324 | |
| 3325 | if (chan->common.usedby == API){ |
| 3326 | |
| 3327 | switch (old_state){ |
| 3328 | |
| 3329 | case WAN_CONNECTING: |
| 3330 | send_delayed_cmd_result(card,dev,mb); |
| 3331 | break; |
| 3332 | case WAN_CONNECTED: |
| 3333 | send_oob_msg(card,dev,mb); |
| 3334 | break; |
| 3335 | } |
| 3336 | } |
| 3337 | |
| 3338 | return ((cmd == X25_WRITE) && (lcn == new_lcn)) ? 0 : 1; |
| 3339 | } |
| 3340 | |
| 3341 | /*==================================================================== |
| 3342 | * Handle X.25 restart event. |
| 3343 | *====================================================================*/ |
| 3344 | |
| 3345 | static int restart_event (sdla_t* card, int cmd, int lcn, TX25Mbox* mb) |
| 3346 | { |
| 3347 | struct wan_device* wandev = &card->wandev; |
| 3348 | struct net_device* dev; |
| 3349 | x25_channel_t *chan; |
| 3350 | unsigned char old_state; |
| 3351 | |
| 3352 | printk(KERN_INFO |
| 3353 | "%s: X.25 restart request! Cause:0x%02X Diagn:0x%02X\n", |
| 3354 | card->devname, mb->cmd.cause, mb->cmd.diagn); |
| 3355 | |
| 3356 | /* down all logical channels */ |
| 3357 | for (dev = wandev->dev; dev; dev = *((struct net_device **)dev->priv)) { |
| 3358 | chan=dev->priv; |
| 3359 | old_state = chan->common.state; |
| 3360 | |
| 3361 | set_chan_state(dev, WAN_DISCONNECTED); |
| 3362 | |
| 3363 | if (chan->common.usedby == API){ |
| 3364 | switch (old_state){ |
| 3365 | |
| 3366 | case WAN_CONNECTING: |
| 3367 | send_delayed_cmd_result(card,dev,mb); |
| 3368 | break; |
| 3369 | case WAN_CONNECTED: |
| 3370 | send_oob_msg(card,dev,mb); |
| 3371 | break; |
| 3372 | } |
| 3373 | } |
| 3374 | } |
| 3375 | return (cmd == X25_WRITE) ? 0 : 1; |
| 3376 | } |
| 3377 | |
| 3378 | /*==================================================================== |
| 3379 | * Handle timeout event. |
| 3380 | *====================================================================*/ |
| 3381 | |
| 3382 | static int timeout_event (sdla_t* card, int cmd, int lcn, TX25Mbox* mb) |
| 3383 | { |
| 3384 | unsigned new_lcn = mb->cmd.lcn; |
| 3385 | |
| 3386 | if (mb->cmd.pktType == 0x05) /* call request time out */ |
| 3387 | { |
| 3388 | struct net_device* dev = find_channel(card,new_lcn); |
| 3389 | |
| 3390 | printk(KERN_INFO "%s: X.25 call timed timeout on LCN %d!\n", |
| 3391 | card->devname, new_lcn); |
| 3392 | |
| 3393 | if (dev){ |
| 3394 | x25_channel_t *chan = dev->priv; |
| 3395 | set_chan_state(dev, WAN_DISCONNECTED); |
| 3396 | |
| 3397 | if (chan->common.usedby == API){ |
| 3398 | send_delayed_cmd_result(card,dev,card->mbox); |
| 3399 | } |
| 3400 | } |
| 3401 | }else{ |
| 3402 | printk(KERN_INFO "%s: X.25 packet 0x%02X timeout on LCN %d!\n", |
| 3403 | card->devname, mb->cmd.pktType, new_lcn); |
| 3404 | } |
| 3405 | return 1; |
| 3406 | } |
| 3407 | |
| 3408 | /* |
| 3409 | * Miscellaneous |
| 3410 | */ |
| 3411 | |
| 3412 | /*==================================================================== |
| 3413 | * Establish physical connection. |
| 3414 | * o open HDLC and raise DTR |
| 3415 | * |
| 3416 | * Return: 0 connection established |
| 3417 | * 1 connection is in progress |
| 3418 | * <0 error |
| 3419 | *===================================================================*/ |
| 3420 | |
| 3421 | static int connect (sdla_t* card) |
| 3422 | { |
| 3423 | TX25Status* status = card->flags; |
| 3424 | |
| 3425 | if (x25_open_hdlc(card) || x25_setup_hdlc(card)) |
| 3426 | return -EIO; |
| 3427 | |
| 3428 | wanpipe_set_state(card, WAN_CONNECTING); |
| 3429 | |
| 3430 | x25_set_intr_mode(card, INTR_ON_TIMER); |
| 3431 | status->imask &= ~INTR_ON_TIMER; |
| 3432 | |
| 3433 | return 1; |
| 3434 | } |
| 3435 | |
| 3436 | /* |
| 3437 | * Tear down physical connection. |
| 3438 | * o close HDLC link |
| 3439 | * o drop DTR |
| 3440 | * |
| 3441 | * Return: 0 |
| 3442 | * <0 error |
| 3443 | */ |
| 3444 | |
| 3445 | static int disconnect (sdla_t* card) |
| 3446 | { |
| 3447 | wanpipe_set_state(card, WAN_DISCONNECTED); |
| 3448 | x25_set_intr_mode(card, INTR_ON_TIMER); /* disable all interrupt except timer */ |
| 3449 | x25_close_hdlc(card); /* close HDLC link */ |
| 3450 | x25_set_dtr(card, 0); /* drop DTR */ |
| 3451 | return 0; |
| 3452 | } |
| 3453 | |
| 3454 | /* |
| 3455 | * Find network device by its channel number. |
| 3456 | */ |
| 3457 | |
| 3458 | static struct net_device* get_dev_by_lcn(struct wan_device* wandev, |
| 3459 | unsigned lcn) |
| 3460 | { |
| 3461 | struct net_device* dev; |
| 3462 | |
| 3463 | for (dev = wandev->dev; dev; dev = *((struct net_device **)dev->priv)) |
| 3464 | if (((x25_channel_t*)dev->priv)->common.lcn == lcn) |
| 3465 | break; |
| 3466 | return dev; |
| 3467 | } |
| 3468 | |
| 3469 | /* |
| 3470 | * Initiate connection on the logical channel. |
| 3471 | * o for PVC we just get channel configuration |
| 3472 | * o for SVCs place an X.25 call |
| 3473 | * |
| 3474 | * Return: 0 connected |
| 3475 | * >0 connection in progress |
| 3476 | * <0 failure |
| 3477 | */ |
| 3478 | |
| 3479 | static int chan_connect(struct net_device* dev) |
| 3480 | { |
| 3481 | x25_channel_t* chan = dev->priv; |
| 3482 | sdla_t* card = chan->card; |
| 3483 | |
| 3484 | if (chan->common.svc && chan->common.usedby == WANPIPE){ |
| 3485 | if (!chan->addr[0]){ |
| 3486 | printk(KERN_INFO "%s: No Destination Address\n", |
| 3487 | card->devname); |
| 3488 | return -EINVAL; /* no destination address */ |
| 3489 | } |
| 3490 | printk(KERN_INFO "%s: placing X.25 call to %s ...\n", |
| 3491 | card->devname, chan->addr); |
| 3492 | |
| 3493 | if (x25_place_call(card, chan) != CMD_OK) |
| 3494 | return -EIO; |
| 3495 | |
| 3496 | set_chan_state(dev, WAN_CONNECTING); |
| 3497 | return 1; |
| 3498 | }else{ |
| 3499 | if (x25_get_chan_conf(card, chan) != CMD_OK) |
| 3500 | return -EIO; |
| 3501 | |
| 3502 | set_chan_state(dev, WAN_CONNECTED); |
| 3503 | } |
| 3504 | return 0; |
| 3505 | } |
| 3506 | |
| 3507 | /* |
| 3508 | * Disconnect logical channel. |
| 3509 | * o if SVC then clear X.25 call |
| 3510 | */ |
| 3511 | |
| 3512 | static int chan_disc(struct net_device* dev) |
| 3513 | { |
| 3514 | x25_channel_t* chan = dev->priv; |
| 3515 | |
| 3516 | if (chan->common.svc){ |
| 3517 | x25_clear_call(chan->card, chan->common.lcn, 0, 0); |
| 3518 | |
| 3519 | /* For API we disconnect on clear |
| 3520 | * confirmation. |
| 3521 | */ |
| 3522 | if (chan->common.usedby == API) |
| 3523 | return 0; |
| 3524 | } |
| 3525 | |
| 3526 | set_chan_state(dev, WAN_DISCONNECTED); |
| 3527 | |
| 3528 | return 0; |
| 3529 | } |
| 3530 | |
| 3531 | /* |
| 3532 | * Set logical channel state. |
| 3533 | */ |
| 3534 | |
| 3535 | static void set_chan_state(struct net_device* dev, int state) |
| 3536 | { |
| 3537 | x25_channel_t* chan = dev->priv; |
| 3538 | sdla_t* card = chan->card; |
| 3539 | unsigned long flags; |
| 3540 | |
| 3541 | save_flags(flags); |
| 3542 | cli(); |
| 3543 | if (chan->common.state != state) |
| 3544 | { |
| 3545 | switch (state) |
| 3546 | { |
| 3547 | case WAN_CONNECTED: |
| 3548 | if (card->u.x.logging){ |
| 3549 | printk (KERN_INFO |
| 3550 | "%s: interface %s connected, lcn %i !\n", |
| 3551 | card->devname, dev->name,chan->common.lcn); |
| 3552 | } |
| 3553 | *(unsigned short*)dev->dev_addr = htons(chan->common.lcn); |
| 3554 | chan->i_timeout_sofar = jiffies; |
| 3555 | |
| 3556 | /* LAPB is PVC Based */ |
| 3557 | if (card->u.x.LAPB_hdlc) |
| 3558 | chan->common.svc=0; |
| 3559 | break; |
| 3560 | |
| 3561 | case WAN_CONNECTING: |
| 3562 | if (card->u.x.logging){ |
| 3563 | printk (KERN_INFO |
| 3564 | "%s: interface %s connecting, lcn %i ...\n", |
| 3565 | card->devname, dev->name, chan->common.lcn); |
| 3566 | } |
| 3567 | break; |
| 3568 | |
| 3569 | case WAN_DISCONNECTED: |
| 3570 | if (card->u.x.logging){ |
| 3571 | printk (KERN_INFO |
| 3572 | "%s: interface %s disconnected, lcn %i !\n", |
| 3573 | card->devname, dev->name,chan->common.lcn); |
| 3574 | } |
| 3575 | atomic_set(&chan->common.disconnect,0); |
| 3576 | |
| 3577 | if (chan->common.svc) { |
| 3578 | *(unsigned short*)dev->dev_addr = 0; |
| 3579 | card->u.x.svc_to_dev_map[(chan->common.lcn%X25_MAX_CHAN)]=NULL; |
| 3580 | chan->common.lcn = 0; |
| 3581 | } |
| 3582 | |
| 3583 | if (chan->transmit_length){ |
| 3584 | chan->transmit_length=0; |
| 3585 | atomic_set(&chan->common.driver_busy,0); |
| 3586 | chan->tx_offset=0; |
| 3587 | if (netif_queue_stopped(dev)){ |
| 3588 | netif_wake_queue(dev); |
| 3589 | } |
| 3590 | } |
| 3591 | atomic_set(&chan->common.command,0); |
| 3592 | break; |
| 3593 | |
| 3594 | case WAN_DISCONNECTING: |
| 3595 | if (card->u.x.logging){ |
| 3596 | printk (KERN_INFO |
| 3597 | "\n%s: interface %s disconnecting, lcn %i ...\n", |
| 3598 | card->devname, dev->name,chan->common.lcn); |
| 3599 | } |
| 3600 | atomic_set(&chan->common.disconnect,0); |
| 3601 | break; |
| 3602 | } |
| 3603 | chan->common.state = state; |
| 3604 | } |
| 3605 | chan->state_tick = jiffies; |
| 3606 | restore_flags(flags); |
| 3607 | } |
| 3608 | |
| 3609 | /* |
| 3610 | * Send packet on a logical channel. |
| 3611 | * When this function is called, tx_skb field of the channel data |
| 3612 | * space points to the transmit socket buffer. When transmission |
| 3613 | * is complete, release socket buffer and reset 'tbusy' flag. |
| 3614 | * |
| 3615 | * Return: 0 - transmission complete |
| 3616 | * 1 - busy |
| 3617 | * |
| 3618 | * Notes: |
| 3619 | * 1. If packet length is greater than MTU for this channel, we'll fragment |
| 3620 | * the packet into 'complete sequence' using M-bit. |
| 3621 | * 2. When transmission is complete, an event notification should be issued |
| 3622 | * to the router. |
| 3623 | */ |
| 3624 | |
| 3625 | static int chan_send(struct net_device* dev, void* buff, unsigned data_len, |
| 3626 | unsigned char tx_intr) |
| 3627 | { |
| 3628 | x25_channel_t* chan = dev->priv; |
| 3629 | sdla_t* card = chan->card; |
| 3630 | TX25Status* status = card->flags; |
| 3631 | unsigned len=0, qdm=0, res=0, orig_len = 0; |
| 3632 | void *data; |
| 3633 | |
| 3634 | /* Check to see if channel is ready */ |
| 3635 | if ((!(status->cflags[chan->ch_idx] & 0x40) && !card->u.x.LAPB_hdlc) || |
| 3636 | !(*card->u.x.hdlc_buf_status & 0x40)){ |
| 3637 | |
| 3638 | if (!tx_intr){ |
| 3639 | setup_for_delayed_transmit (dev, buff, data_len); |
| 3640 | return 0; |
| 3641 | }else{ |
| 3642 | /* By returning 0 to tx_intr the packet will be dropped */ |
| 3643 | ++card->wandev.stats.tx_dropped; |
| 3644 | ++chan->ifstats.tx_dropped; |
| 3645 | printk(KERN_INFO "%s: ERROR, Tx intr could not send, dropping %s:\n", |
| 3646 | card->devname,dev->name); |
| 3647 | ++chan->if_send_stat.if_send_bfr_not_passed_to_adptr; |
| 3648 | return 0; |
| 3649 | } |
| 3650 | } |
| 3651 | |
| 3652 | if (chan->common.usedby == API){ |
| 3653 | /* Remove the API Header */ |
| 3654 | x25api_hdr_t *api_data = (x25api_hdr_t *)buff; |
| 3655 | |
| 3656 | /* Set the qdm bits from the packet header |
| 3657 | * User has the option to set the qdm bits |
| 3658 | */ |
| 3659 | qdm = api_data->qdm; |
| 3660 | |
| 3661 | orig_len = len = data_len - sizeof(x25api_hdr_t); |
| 3662 | data = (unsigned char*)buff + sizeof(x25api_hdr_t); |
| 3663 | }else{ |
| 3664 | data = buff; |
| 3665 | orig_len = len = data_len; |
| 3666 | } |
| 3667 | |
| 3668 | if (tx_intr){ |
| 3669 | /* We are in tx_intr, minus the tx_offset from |
| 3670 | * the total length. The tx_offset part of the |
| 3671 | * data has already been sent. Also, move the |
| 3672 | * data pointer to proper offset location. |
| 3673 | */ |
| 3674 | len -= chan->tx_offset; |
| 3675 | data = (unsigned char*)data + chan->tx_offset; |
| 3676 | } |
| 3677 | |
| 3678 | /* Check if the packet length is greater than MTU |
| 3679 | * If YES: Cut the len to MTU and set the M bit |
| 3680 | */ |
| 3681 | if (len > chan->tx_pkt_size && !card->u.x.LAPB_hdlc){ |
| 3682 | len = chan->tx_pkt_size; |
| 3683 | qdm |= M_BIT; |
| 3684 | } |
| 3685 | |
| 3686 | |
| 3687 | /* Pass only first three bits of the qdm byte to the send |
| 3688 | * routine. In case user sets any other bit which might |
| 3689 | * cause errors. |
| 3690 | */ |
| 3691 | |
| 3692 | switch(x25_send(card, chan->common.lcn, (qdm&0x07), len, data)){ |
| 3693 | case 0x00: /* success */ |
| 3694 | chan->i_timeout_sofar = jiffies; |
| 3695 | |
| 3696 | dev->trans_start=jiffies; |
| 3697 | |
| 3698 | if ((qdm & M_BIT) && !card->u.x.LAPB_hdlc){ |
| 3699 | if (!tx_intr){ |
| 3700 | /* The M bit was set, which means that part of the |
| 3701 | * packet has been sent. Copy the packet into a buffer |
| 3702 | * and set the offset to len, so on next tx_inter |
| 3703 | * the packet will be sent using the below offset. |
| 3704 | */ |
| 3705 | chan->tx_offset += len; |
| 3706 | |
| 3707 | ++chan->ifstats.tx_packets; |
| 3708 | chan->ifstats.tx_bytes += len; |
| 3709 | |
| 3710 | if (chan->tx_offset < orig_len){ |
| 3711 | setup_for_delayed_transmit (dev, buff, data_len); |
| 3712 | } |
| 3713 | res=0; |
| 3714 | }else{ |
| 3715 | /* We are already in tx_inter, thus data is already |
| 3716 | * in the buffer. Update the offset and wait for |
| 3717 | * next tx_intr. We add on to the offset, since data can |
| 3718 | * be X number of times larger than max data size. |
| 3719 | */ |
| 3720 | ++chan->ifstats.tx_packets; |
| 3721 | chan->ifstats.tx_bytes += len; |
| 3722 | |
| 3723 | ++chan->if_send_stat.if_send_bfr_passed_to_adptr; |
| 3724 | chan->tx_offset += len; |
| 3725 | |
| 3726 | /* The user can set the qdm bit as well. |
| 3727 | * If the entire packet was sent and qdm is still |
| 3728 | * set, than it's the user who has set the M bit. In that, |
| 3729 | * case indicate that the packet was send by returning |
| 3730 | * 0 and wait for a new packet. Otherwise, wait for next |
| 3731 | * tx interrupt to send the rest of the packet */ |
| 3732 | |
| 3733 | if (chan->tx_offset < orig_len){ |
| 3734 | res=1; |
| 3735 | }else{ |
| 3736 | res=0; |
| 3737 | } |
| 3738 | } |
| 3739 | }else{ |
| 3740 | ++chan->ifstats.tx_packets; |
| 3741 | chan->ifstats.tx_bytes += len; |
| 3742 | ++chan->if_send_stat.if_send_bfr_passed_to_adptr; |
| 3743 | res=0; |
| 3744 | } |
| 3745 | break; |
| 3746 | |
| 3747 | case 0x33: /* Tx busy */ |
| 3748 | if (tx_intr){ |
| 3749 | printk(KERN_INFO "%s: Tx_intr: Big Error dropping packet %s\n", |
| 3750 | card->devname,dev->name); |
| 3751 | ++chan->ifstats.tx_dropped; |
| 3752 | ++card->wandev.stats.tx_dropped; |
| 3753 | ++chan->if_send_stat.if_send_bfr_not_passed_to_adptr; |
| 3754 | res=0; |
| 3755 | }else{ |
| 3756 | DBG_PRINTK(KERN_INFO |
| 3757 | "%s: Send: Big Error should have tx: storring %s\n", |
| 3758 | card->devname,dev->name); |
| 3759 | setup_for_delayed_transmit (dev, buff, data_len); |
| 3760 | res=1; |
| 3761 | } |
| 3762 | break; |
| 3763 | |
| 3764 | default: /* failure */ |
| 3765 | ++chan->ifstats.tx_errors; |
| 3766 | if (tx_intr){ |
| 3767 | printk(KERN_INFO "%s: Tx_intr: Failure to send, dropping %s\n", |
| 3768 | card->devname,dev->name); |
| 3769 | ++chan->ifstats.tx_dropped; |
| 3770 | ++card->wandev.stats.tx_dropped; |
| 3771 | ++chan->if_send_stat.if_send_bfr_not_passed_to_adptr; |
| 3772 | res=0; |
| 3773 | }else{ |
| 3774 | DBG_PRINTK(KERN_INFO "%s: Send: Failure to send !!!, storing %s\n", |
| 3775 | card->devname,dev->name); |
| 3776 | setup_for_delayed_transmit (dev, buff, data_len); |
| 3777 | res=1; |
| 3778 | } |
| 3779 | break; |
| 3780 | } |
| 3781 | return res; |
| 3782 | } |
| 3783 | |
| 3784 | |
| 3785 | /* |
| 3786 | * Parse X.25 call request data and fill x25_call_info_t structure. |
| 3787 | */ |
| 3788 | |
| 3789 | static void parse_call_info (unsigned char* str, x25_call_info_t* info) |
| 3790 | { |
| 3791 | memset(info, 0, sizeof(x25_call_info_t)); |
| 3792 | for (; *str; ++str) |
| 3793 | { |
| 3794 | int i; |
| 3795 | unsigned char ch; |
| 3796 | |
| 3797 | if (*str == '-') switch (str[1]) { |
| 3798 | |
| 3799 | /* Take minus 2 off the maximum size so that |
| 3800 | * last byte is 0. This way we can use string |
| 3801 | * manipulaton functions on call information. |
| 3802 | */ |
| 3803 | |
| 3804 | case 'd': /* destination address */ |
| 3805 | for (i = 0; i < (MAX_X25_ADDR_SIZE-2); ++i){ |
| 3806 | ch = str[2+i]; |
| 3807 | if (isspace(ch)) break; |
| 3808 | info->dest[i] = ch; |
| 3809 | } |
| 3810 | break; |
| 3811 | |
| 3812 | case 's': /* source address */ |
| 3813 | for (i = 0; i < (MAX_X25_ADDR_SIZE-2); ++i){ |
| 3814 | ch = str[2+i]; |
| 3815 | if (isspace(ch)) break; |
| 3816 | info->src[i] = ch; |
| 3817 | } |
| 3818 | break; |
| 3819 | |
| 3820 | case 'u': /* user data */ |
| 3821 | for (i = 0; i < (MAX_X25_DATA_SIZE-2); ++i){ |
| 3822 | ch = str[2+i]; |
| 3823 | if (isspace(ch)) break; |
| 3824 | info->user[i] = ch; |
| 3825 | } |
| 3826 | info->nuser = i; |
| 3827 | break; |
| 3828 | |
| 3829 | case 'f': /* facilities */ |
| 3830 | for (i = 0; i < (MAX_X25_FACL_SIZE-2); ++i){ |
| 3831 | ch = str[2+i]; |
| 3832 | if (isspace(ch)) break; |
| 3833 | info->facil[i] = ch; |
| 3834 | } |
| 3835 | info->nfacil = i; |
| 3836 | break; |
| 3837 | } |
| 3838 | } |
| 3839 | } |
| 3840 | |
| 3841 | /* |
| 3842 | * Convert line speed in bps to a number used by S502 code. |
| 3843 | */ |
| 3844 | |
| 3845 | static unsigned char bps_to_speed_code (unsigned long bps) |
| 3846 | { |
| 3847 | unsigned char number; |
| 3848 | |
| 3849 | if (bps <= 1200) number = 0x01; |
| 3850 | else if (bps <= 2400) number = 0x02; |
| 3851 | else if (bps <= 4800) number = 0x03; |
| 3852 | else if (bps <= 9600) number = 0x04; |
| 3853 | else if (bps <= 19200) number = 0x05; |
| 3854 | else if (bps <= 38400) number = 0x06; |
| 3855 | else if (bps <= 45000) number = 0x07; |
| 3856 | else if (bps <= 56000) number = 0x08; |
| 3857 | else if (bps <= 64000) number = 0x09; |
| 3858 | else if (bps <= 74000) number = 0x0A; |
| 3859 | else if (bps <= 112000) number = 0x0B; |
| 3860 | else if (bps <= 128000) number = 0x0C; |
| 3861 | else number = 0x0D; |
| 3862 | |
| 3863 | return number; |
| 3864 | } |
| 3865 | |
| 3866 | /* |
| 3867 | * Convert decimal string to unsigned integer. |
| 3868 | * If len != 0 then only 'len' characters of the string are converted. |
| 3869 | */ |
| 3870 | |
| 3871 | static unsigned int dec_to_uint (unsigned char* str, int len) |
| 3872 | { |
| 3873 | unsigned val; |
| 3874 | |
| 3875 | if (!len) |
| 3876 | len = strlen(str); |
| 3877 | |
Tobias Klauser | 8e18d1f | 2005-09-10 14:45:00 -0700 | [diff] [blame] | 3878 | for (val = 0; len && isdigit(*str); ++str, --len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3879 | val = (val * 10) + (*str - (unsigned)'0'); |
| 3880 | |
| 3881 | return val; |
| 3882 | } |
| 3883 | |
| 3884 | /* |
| 3885 | * Convert hex string to unsigned integer. |
| 3886 | * If len != 0 then only 'len' characters of the string are conferted. |
| 3887 | */ |
| 3888 | |
| 3889 | static unsigned int hex_to_uint (unsigned char* str, int len) |
| 3890 | { |
| 3891 | unsigned val, ch; |
| 3892 | |
| 3893 | if (!len) |
| 3894 | len = strlen(str); |
| 3895 | |
| 3896 | for (val = 0; len; ++str, --len) |
| 3897 | { |
| 3898 | ch = *str; |
Tobias Klauser | 8e18d1f | 2005-09-10 14:45:00 -0700 | [diff] [blame] | 3899 | if (isdigit(ch)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3900 | val = (val << 4) + (ch - (unsigned)'0'); |
Tobias Klauser | 8e18d1f | 2005-09-10 14:45:00 -0700 | [diff] [blame] | 3901 | else if (isxdigit(ch)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3902 | val = (val << 4) + ((ch & 0xDF) - (unsigned)'A' + 10); |
| 3903 | else break; |
| 3904 | } |
| 3905 | return val; |
| 3906 | } |
| 3907 | |
| 3908 | |
| 3909 | static int handle_IPXWAN(unsigned char *sendpacket, char *devname, unsigned char enable_IPX, unsigned long network_number, unsigned short proto) |
| 3910 | { |
| 3911 | int i; |
| 3912 | |
| 3913 | if( proto == ETH_P_IPX) { |
| 3914 | /* It's an IPX packet */ |
| 3915 | if(!enable_IPX) { |
| 3916 | /* Return 1 so we don't pass it up the stack. */ |
| 3917 | return 1; |
| 3918 | } |
| 3919 | } else { |
| 3920 | /* It's not IPX so pass it up the stack.*/ |
| 3921 | return 0; |
| 3922 | } |
| 3923 | |
| 3924 | if( sendpacket[16] == 0x90 && |
| 3925 | sendpacket[17] == 0x04) |
| 3926 | { |
| 3927 | /* It's IPXWAN */ |
| 3928 | |
| 3929 | if( sendpacket[2] == 0x02 && |
| 3930 | sendpacket[34] == 0x00) |
| 3931 | { |
| 3932 | /* It's a timer request packet */ |
| 3933 | printk(KERN_INFO "%s: Received IPXWAN Timer Request packet\n",devname); |
| 3934 | |
| 3935 | /* Go through the routing options and answer no to every |
| 3936 | * option except Unnumbered RIP/SAP |
| 3937 | */ |
| 3938 | for(i = 41; sendpacket[i] == 0x00; i += 5) |
| 3939 | { |
| 3940 | /* 0x02 is the option for Unnumbered RIP/SAP */ |
| 3941 | if( sendpacket[i + 4] != 0x02) |
| 3942 | { |
| 3943 | sendpacket[i + 1] = 0; |
| 3944 | } |
| 3945 | } |
| 3946 | |
| 3947 | /* Skip over the extended Node ID option */ |
| 3948 | if( sendpacket[i] == 0x04 ) |
| 3949 | { |
| 3950 | i += 8; |
| 3951 | } |
| 3952 | |
| 3953 | /* We also want to turn off all header compression opt. */ |
| 3954 | for(; sendpacket[i] == 0x80 ;) |
| 3955 | { |
| 3956 | sendpacket[i + 1] = 0; |
| 3957 | i += (sendpacket[i + 2] << 8) + (sendpacket[i + 3]) + 4; |
| 3958 | } |
| 3959 | |
| 3960 | /* Set the packet type to timer response */ |
| 3961 | sendpacket[34] = 0x01; |
| 3962 | |
| 3963 | printk(KERN_INFO "%s: Sending IPXWAN Timer Response\n",devname); |
| 3964 | } |
| 3965 | else if( sendpacket[34] == 0x02 ) |
| 3966 | { |
| 3967 | /* This is an information request packet */ |
| 3968 | printk(KERN_INFO "%s: Received IPXWAN Information Request packet\n",devname); |
| 3969 | |
| 3970 | /* Set the packet type to information response */ |
| 3971 | sendpacket[34] = 0x03; |
| 3972 | |
| 3973 | /* Set the router name */ |
| 3974 | sendpacket[51] = 'X'; |
| 3975 | sendpacket[52] = 'T'; |
| 3976 | sendpacket[53] = 'P'; |
| 3977 | sendpacket[54] = 'I'; |
| 3978 | sendpacket[55] = 'P'; |
| 3979 | sendpacket[56] = 'E'; |
| 3980 | sendpacket[57] = '-'; |
| 3981 | sendpacket[58] = CVHexToAscii(network_number >> 28); |
| 3982 | sendpacket[59] = CVHexToAscii((network_number & 0x0F000000)>> 24); |
| 3983 | sendpacket[60] = CVHexToAscii((network_number & 0x00F00000)>> 20); |
| 3984 | sendpacket[61] = CVHexToAscii((network_number & 0x000F0000)>> 16); |
| 3985 | sendpacket[62] = CVHexToAscii((network_number & 0x0000F000)>> 12); |
| 3986 | sendpacket[63] = CVHexToAscii((network_number & 0x00000F00)>> 8); |
| 3987 | sendpacket[64] = CVHexToAscii((network_number & 0x000000F0)>> 4); |
| 3988 | sendpacket[65] = CVHexToAscii(network_number & 0x0000000F); |
| 3989 | for(i = 66; i < 99; i+= 1) |
| 3990 | { |
| 3991 | sendpacket[i] = 0; |
| 3992 | } |
| 3993 | |
| 3994 | printk(KERN_INFO "%s: Sending IPXWAN Information Response packet\n",devname); |
| 3995 | } |
| 3996 | else |
| 3997 | { |
| 3998 | printk(KERN_INFO "%s: Unknown IPXWAN packet!\n",devname); |
| 3999 | return 0; |
| 4000 | } |
| 4001 | |
| 4002 | /* Set the WNodeID to our network address */ |
| 4003 | sendpacket[35] = (unsigned char)(network_number >> 24); |
| 4004 | sendpacket[36] = (unsigned char)((network_number & 0x00FF0000) >> 16); |
| 4005 | sendpacket[37] = (unsigned char)((network_number & 0x0000FF00) >> 8); |
| 4006 | sendpacket[38] = (unsigned char)(network_number & 0x000000FF); |
| 4007 | |
| 4008 | return 1; |
| 4009 | } else { |
| 4010 | /*If we get here it's an IPX-data packet, so it'll get passed up the stack. |
| 4011 | */ |
| 4012 | /* switch the network numbers */ |
| 4013 | switch_net_numbers(sendpacket, network_number, 1); |
| 4014 | return 0; |
| 4015 | } |
| 4016 | } |
| 4017 | |
| 4018 | /* |
| 4019 | * If incoming is 0 (outgoing)- if the net numbers is ours make it 0 |
| 4020 | * if incoming is 1 - if the net number is 0 make it ours |
| 4021 | */ |
| 4022 | |
| 4023 | static void switch_net_numbers(unsigned char *sendpacket, unsigned long network_number, unsigned char incoming) |
| 4024 | { |
| 4025 | unsigned long pnetwork_number; |
| 4026 | |
| 4027 | pnetwork_number = (unsigned long)((sendpacket[6] << 24) + |
| 4028 | (sendpacket[7] << 16) + (sendpacket[8] << 8) + |
| 4029 | sendpacket[9]); |
| 4030 | |
| 4031 | |
| 4032 | if (!incoming) { |
| 4033 | /*If the destination network number is ours, make it 0 */ |
| 4034 | if( pnetwork_number == network_number) { |
| 4035 | sendpacket[6] = sendpacket[7] = sendpacket[8] = |
| 4036 | sendpacket[9] = 0x00; |
| 4037 | } |
| 4038 | } else { |
| 4039 | /* If the incoming network is 0, make it ours */ |
| 4040 | if( pnetwork_number == 0) { |
| 4041 | sendpacket[6] = (unsigned char)(network_number >> 24); |
| 4042 | sendpacket[7] = (unsigned char)((network_number & |
| 4043 | 0x00FF0000) >> 16); |
| 4044 | sendpacket[8] = (unsigned char)((network_number & |
| 4045 | 0x0000FF00) >> 8); |
| 4046 | sendpacket[9] = (unsigned char)(network_number & |
| 4047 | 0x000000FF); |
| 4048 | } |
| 4049 | } |
| 4050 | |
| 4051 | |
| 4052 | pnetwork_number = (unsigned long)((sendpacket[18] << 24) + |
| 4053 | (sendpacket[19] << 16) + (sendpacket[20] << 8) + |
| 4054 | sendpacket[21]); |
| 4055 | |
| 4056 | |
| 4057 | if( !incoming ) { |
| 4058 | /* If the source network is ours, make it 0 */ |
| 4059 | if( pnetwork_number == network_number) { |
| 4060 | sendpacket[18] = sendpacket[19] = sendpacket[20] = |
| 4061 | sendpacket[21] = 0x00; |
| 4062 | } |
| 4063 | } else { |
| 4064 | /* If the source network is 0, make it ours */ |
| 4065 | if( pnetwork_number == 0 ) { |
| 4066 | sendpacket[18] = (unsigned char)(network_number >> 24); |
| 4067 | sendpacket[19] = (unsigned char)((network_number & |
| 4068 | 0x00FF0000) >> 16); |
| 4069 | sendpacket[20] = (unsigned char)((network_number & |
| 4070 | 0x0000FF00) >> 8); |
| 4071 | sendpacket[21] = (unsigned char)(network_number & |
| 4072 | 0x000000FF); |
| 4073 | } |
| 4074 | } |
| 4075 | } /* switch_net_numbers */ |
| 4076 | |
| 4077 | |
| 4078 | |
| 4079 | |
| 4080 | /********************* X25API SPECIFIC FUNCTIONS ****************/ |
| 4081 | |
| 4082 | |
| 4083 | /*=============================================================== |
| 4084 | * find_channel |
| 4085 | * |
| 4086 | * Manages the lcn to device map. It increases performance |
| 4087 | * because it eliminates the need to search through the link |
| 4088 | * list for a device which is bounded to a specific lcn. |
| 4089 | * |
| 4090 | *===============================================================*/ |
| 4091 | |
| 4092 | |
| 4093 | struct net_device *find_channel(sdla_t *card, unsigned lcn) |
| 4094 | { |
| 4095 | if (card->u.x.LAPB_hdlc){ |
| 4096 | |
| 4097 | return card->wandev.dev; |
| 4098 | |
| 4099 | }else{ |
| 4100 | /* We don't know whether the incoming lcn |
| 4101 | * is a PVC or an SVC channel. But we do know that |
| 4102 | * the lcn cannot be for both the PVC and the SVC |
| 4103 | * channel. |
| 4104 | |
| 4105 | * If the lcn number is greater or equal to 255, |
| 4106 | * take the modulo 255 of that number. We only have |
| 4107 | * 255 locations, thus higher numbers must be mapped |
| 4108 | * to a number between 0 and 245. |
| 4109 | |
| 4110 | * We must separate pvc's and svc's since two don't |
| 4111 | * have to be contiguous. Meaning pvc's can start |
| 4112 | * from 1 to 10 and svc's can start from 256 to 266. |
| 4113 | * But 256%255 is 1, i.e. CONFLICT. |
| 4114 | */ |
| 4115 | |
| 4116 | |
| 4117 | /* Highest LCN number must be less or equal to 4096 */ |
| 4118 | if ((lcn <= MAX_LCN_NUM) && (lcn > 0)){ |
| 4119 | |
| 4120 | if (lcn < X25_MAX_CHAN){ |
| 4121 | if (card->u.x.svc_to_dev_map[lcn]) |
| 4122 | return card->u.x.svc_to_dev_map[lcn]; |
| 4123 | |
| 4124 | if (card->u.x.pvc_to_dev_map[lcn]) |
| 4125 | return card->u.x.pvc_to_dev_map[lcn]; |
| 4126 | |
| 4127 | }else{ |
| 4128 | int new_lcn = lcn%X25_MAX_CHAN; |
| 4129 | if (card->u.x.svc_to_dev_map[new_lcn]) |
| 4130 | return card->u.x.svc_to_dev_map[new_lcn]; |
| 4131 | |
| 4132 | if (card->u.x.pvc_to_dev_map[new_lcn]) |
| 4133 | return card->u.x.pvc_to_dev_map[new_lcn]; |
| 4134 | } |
| 4135 | } |
| 4136 | return NULL; |
| 4137 | } |
| 4138 | } |
| 4139 | |
| 4140 | void bind_lcn_to_dev(sdla_t *card, struct net_device *dev, unsigned lcn) |
| 4141 | { |
| 4142 | x25_channel_t *chan = dev->priv; |
| 4143 | |
| 4144 | /* Modulo the lcn number by X25_MAX_CHAN (255) |
| 4145 | * because the lcn number can be greater than 255 |
| 4146 | * |
| 4147 | * We need to split svc and pvc since they don't have |
| 4148 | * to be contigous. |
| 4149 | */ |
| 4150 | |
| 4151 | if (chan->common.svc){ |
| 4152 | card->u.x.svc_to_dev_map[(lcn % X25_MAX_CHAN)] = dev; |
| 4153 | }else{ |
| 4154 | card->u.x.pvc_to_dev_map[(lcn % X25_MAX_CHAN)] = dev; |
| 4155 | } |
| 4156 | chan->common.lcn = lcn; |
| 4157 | } |
| 4158 | |
| 4159 | |
| 4160 | |
| 4161 | /*=============================================================== |
| 4162 | * x25api_bh |
| 4163 | * |
| 4164 | * |
| 4165 | *==============================================================*/ |
| 4166 | |
| 4167 | static void x25api_bh(struct net_device* dev) |
| 4168 | { |
| 4169 | x25_channel_t* chan = dev->priv; |
| 4170 | sdla_t* card = chan->card; |
| 4171 | struct sk_buff *skb; |
| 4172 | |
| 4173 | if (atomic_read(&chan->bh_buff_used) == 0){ |
| 4174 | printk(KERN_INFO "%s: BH Buffer Empty in BH\n", |
| 4175 | card->devname); |
| 4176 | clear_bit(0, &chan->tq_working); |
| 4177 | return; |
| 4178 | } |
| 4179 | |
| 4180 | while (atomic_read(&chan->bh_buff_used)){ |
| 4181 | |
| 4182 | /* If the sock is in the process of unlinking the |
| 4183 | * driver from the socket, we must get out. |
| 4184 | * This never happends but is a sanity check. */ |
| 4185 | if (test_bit(0,&chan->common.common_critical)){ |
| 4186 | clear_bit(0, &chan->tq_working); |
| 4187 | return; |
| 4188 | } |
| 4189 | |
| 4190 | /* If LAPB HDLC, do not drop packets if socket is |
| 4191 | * not connected. Let the buffer fill up and |
| 4192 | * turn off rx interrupt */ |
| 4193 | if (card->u.x.LAPB_hdlc){ |
| 4194 | if (chan->common.sk == NULL || chan->common.func == NULL){ |
| 4195 | clear_bit(0, &chan->tq_working); |
| 4196 | return; |
| 4197 | } |
| 4198 | } |
| 4199 | |
| 4200 | skb = ((bh_data_t *)&chan->bh_head[chan->bh_read])->skb; |
| 4201 | |
| 4202 | if (skb == NULL){ |
| 4203 | printk(KERN_INFO "%s: BH Skb empty for read %i\n", |
| 4204 | card->devname,chan->bh_read); |
| 4205 | }else{ |
| 4206 | |
| 4207 | if (chan->common.sk == NULL || chan->common.func == NULL){ |
| 4208 | printk(KERN_INFO "%s: BH: Socket disconnected, dropping\n", |
| 4209 | card->devname); |
| 4210 | dev_kfree_skb_any(skb); |
| 4211 | x25api_bh_cleanup(dev); |
| 4212 | ++chan->ifstats.rx_dropped; |
| 4213 | ++chan->rx_intr_stat.rx_intr_bfr_not_passed_to_stack; |
| 4214 | continue; |
| 4215 | } |
| 4216 | |
| 4217 | |
| 4218 | if (chan->common.func(skb,dev,chan->common.sk) != 0){ |
| 4219 | /* Sock full cannot send, queue us for another |
| 4220 | * try |
| 4221 | */ |
| 4222 | printk(KERN_INFO "%s: BH: !!! Packet failed to send !!!!! \n", |
| 4223 | card->devname); |
| 4224 | atomic_set(&chan->common.receive_block,1); |
| 4225 | return; |
| 4226 | }else{ |
| 4227 | x25api_bh_cleanup(dev); |
| 4228 | ++chan->rx_intr_stat.rx_intr_bfr_passed_to_stack; |
| 4229 | } |
| 4230 | } |
| 4231 | } |
| 4232 | clear_bit(0, &chan->tq_working); |
| 4233 | |
| 4234 | return; |
| 4235 | } |
| 4236 | |
| 4237 | /*=============================================================== |
| 4238 | * x25api_bh_cleanup |
| 4239 | * |
| 4240 | * |
| 4241 | *==============================================================*/ |
| 4242 | |
| 4243 | static int x25api_bh_cleanup(struct net_device *dev) |
| 4244 | { |
| 4245 | x25_channel_t* chan = dev->priv; |
| 4246 | sdla_t *card = chan->card; |
| 4247 | TX25Status* status = card->flags; |
| 4248 | |
| 4249 | |
| 4250 | ((bh_data_t *)&chan->bh_head[chan->bh_read])->skb = NULL; |
| 4251 | |
| 4252 | if (chan->bh_read == MAX_BH_BUFF){ |
| 4253 | chan->bh_read=0; |
| 4254 | }else{ |
| 4255 | ++chan->bh_read; |
| 4256 | } |
| 4257 | |
| 4258 | /* If the Receive interrupt was off, it means |
| 4259 | * that we filled up our circular buffer. Check |
| 4260 | * that we have space in the buffer. If so |
| 4261 | * turn the RX interrupt back on. |
| 4262 | */ |
| 4263 | if (!(status->imask & INTR_ON_RX_FRAME)){ |
| 4264 | if (atomic_read(&chan->bh_buff_used) < (MAX_BH_BUFF+1)){ |
| 4265 | printk(KERN_INFO "%s: BH: Turning on the interrupt\n", |
| 4266 | card->devname); |
| 4267 | status->imask |= INTR_ON_RX_FRAME; |
| 4268 | } |
| 4269 | } |
| 4270 | |
| 4271 | atomic_dec(&chan->bh_buff_used); |
| 4272 | return 0; |
| 4273 | } |
| 4274 | |
| 4275 | |
| 4276 | /*=============================================================== |
| 4277 | * bh_enqueue |
| 4278 | * |
| 4279 | * |
| 4280 | *==============================================================*/ |
| 4281 | |
| 4282 | static int bh_enqueue(struct net_device *dev, struct sk_buff *skb) |
| 4283 | { |
| 4284 | x25_channel_t* chan = dev->priv; |
| 4285 | sdla_t *card = chan->card; |
| 4286 | TX25Status* status = card->flags; |
| 4287 | |
| 4288 | if (atomic_read(&chan->bh_buff_used) == (MAX_BH_BUFF+1)){ |
| 4289 | printk(KERN_INFO "%s: Bottom half buffer FULL\n", |
| 4290 | card->devname); |
| 4291 | return 1; |
| 4292 | } |
| 4293 | |
| 4294 | ((bh_data_t *)&chan->bh_head[chan->bh_write])->skb = skb; |
| 4295 | |
| 4296 | if (chan->bh_write == MAX_BH_BUFF){ |
| 4297 | chan->bh_write=0; |
| 4298 | }else{ |
| 4299 | ++chan->bh_write; |
| 4300 | } |
| 4301 | |
| 4302 | atomic_inc(&chan->bh_buff_used); |
| 4303 | |
| 4304 | if (atomic_read(&chan->bh_buff_used) == (MAX_BH_BUFF+1)){ |
| 4305 | printk(KERN_INFO "%s: Buffer is now full, Turning off RX Intr\n", |
| 4306 | card->devname); |
| 4307 | status->imask &= ~INTR_ON_RX_FRAME; |
| 4308 | } |
| 4309 | |
| 4310 | return 0; |
| 4311 | } |
| 4312 | |
| 4313 | |
| 4314 | /*=============================================================== |
| 4315 | * timer_intr_cmd_exec |
| 4316 | * |
| 4317 | * Called by timer interrupt to execute a command |
| 4318 | *===============================================================*/ |
| 4319 | |
| 4320 | static int timer_intr_cmd_exec (sdla_t* card) |
| 4321 | { |
| 4322 | struct net_device *dev; |
| 4323 | unsigned char more_to_exec=0; |
| 4324 | volatile x25_channel_t *chan=NULL; |
| 4325 | int i=0,bad_cmd=0,err=0; |
| 4326 | |
| 4327 | if (card->u.x.cmd_dev == NULL){ |
| 4328 | card->u.x.cmd_dev = card->wandev.dev; |
| 4329 | } |
| 4330 | |
| 4331 | dev = card->u.x.cmd_dev; |
| 4332 | |
| 4333 | for (;;){ |
| 4334 | |
| 4335 | chan = dev->priv; |
| 4336 | |
| 4337 | if (atomic_read(&chan->common.command)){ |
| 4338 | |
| 4339 | bad_cmd = check_bad_command(card,dev); |
| 4340 | |
| 4341 | if ((!chan->common.mbox || atomic_read(&chan->common.disconnect)) && |
| 4342 | !bad_cmd){ |
| 4343 | |
| 4344 | /* Socket has died or exited, We must bring the |
| 4345 | * channel down before anybody else tries to |
| 4346 | * use it */ |
| 4347 | err = channel_disconnect(card,dev); |
| 4348 | }else{ |
| 4349 | err = execute_delayed_cmd(card, dev, |
| 4350 | (mbox_cmd_t*)chan->common.mbox, |
| 4351 | bad_cmd); |
| 4352 | } |
| 4353 | |
| 4354 | switch (err){ |
| 4355 | |
| 4356 | case RETURN_RESULT: |
| 4357 | |
| 4358 | /* Return the result to the socket without |
| 4359 | * delay. NO_WAIT Command */ |
| 4360 | atomic_set(&chan->common.command,0); |
| 4361 | if (atomic_read(&card->u.x.command_busy)) |
| 4362 | atomic_set(&card->u.x.command_busy,0); |
| 4363 | |
| 4364 | send_delayed_cmd_result(card,dev,card->mbox); |
| 4365 | |
| 4366 | more_to_exec=0; |
| 4367 | break; |
| 4368 | case DELAY_RESULT: |
| 4369 | |
| 4370 | /* Wait for the remote to respond, before |
| 4371 | * sending the result up to the socket. |
| 4372 | * WAIT command */ |
| 4373 | if (atomic_read(&card->u.x.command_busy)) |
| 4374 | atomic_set(&card->u.x.command_busy,0); |
| 4375 | |
| 4376 | atomic_set(&chan->common.command,0); |
| 4377 | more_to_exec=0; |
| 4378 | break; |
| 4379 | default: |
| 4380 | |
| 4381 | /* If command could not be executed for |
| 4382 | * some reason (i.e return code 0x33 busy) |
| 4383 | * set the more_to_exec bit which will |
| 4384 | * indicate that this command must be exectued |
| 4385 | * again during next timer interrupt |
| 4386 | */ |
| 4387 | more_to_exec=1; |
| 4388 | if (atomic_read(&card->u.x.command_busy) == 0) |
| 4389 | atomic_set(&card->u.x.command_busy,1); |
| 4390 | break; |
| 4391 | } |
| 4392 | |
| 4393 | bad_cmd=0; |
| 4394 | |
| 4395 | /* If flags is set, there are no hdlc buffers, |
| 4396 | * thus, wait for the next pass and try the |
| 4397 | * same command again. Otherwise, start searching |
| 4398 | * from next device on the next pass. |
| 4399 | */ |
| 4400 | if (!more_to_exec){ |
| 4401 | dev = move_dev_to_next(card,dev); |
| 4402 | } |
| 4403 | break; |
| 4404 | }else{ |
| 4405 | /* This device has nothing to execute, |
| 4406 | * go to next. |
| 4407 | */ |
| 4408 | if (atomic_read(&card->u.x.command_busy)) |
| 4409 | atomic_set(&card->u.x.command_busy,0); |
| 4410 | dev = move_dev_to_next(card,dev); |
| 4411 | } |
| 4412 | |
| 4413 | if (++i == card->u.x.no_dev){ |
| 4414 | if (!more_to_exec){ |
| 4415 | DBG_PRINTK(KERN_INFO "%s: Nothing to execute in Timer\n", |
| 4416 | card->devname); |
| 4417 | if (atomic_read(&card->u.x.command_busy)){ |
| 4418 | atomic_set(&card->u.x.command_busy,0); |
| 4419 | } |
| 4420 | } |
| 4421 | break; |
| 4422 | } |
| 4423 | |
| 4424 | } //End of FOR |
| 4425 | |
| 4426 | card->u.x.cmd_dev = dev; |
| 4427 | |
| 4428 | if (more_to_exec){ |
| 4429 | /* If more commands are pending, do not turn off timer |
| 4430 | * interrupt */ |
| 4431 | return 1; |
| 4432 | }else{ |
| 4433 | /* No more commands, turn off timer interrupt */ |
| 4434 | return 0; |
| 4435 | } |
| 4436 | } |
| 4437 | |
| 4438 | /*=============================================================== |
| 4439 | * execute_delayed_cmd |
| 4440 | * |
| 4441 | * Execute an API command which was passed down from the |
| 4442 | * sock. Sock is very limited in which commands it can |
| 4443 | * execute. Wait and No Wait commands are supported. |
| 4444 | * Place Call, Clear Call and Reset wait commands, where |
| 4445 | * Accept Call is a no_wait command. |
| 4446 | * |
| 4447 | *===============================================================*/ |
| 4448 | |
| 4449 | static int execute_delayed_cmd(sdla_t* card, struct net_device *dev, |
| 4450 | mbox_cmd_t *usr_cmd, char bad_cmd) |
| 4451 | { |
| 4452 | TX25Mbox* mbox = card->mbox; |
| 4453 | int err; |
| 4454 | x25_channel_t *chan = dev->priv; |
| 4455 | int delay=RETURN_RESULT; |
| 4456 | |
| 4457 | if (!(*card->u.x.hdlc_buf_status & 0x40) && !bad_cmd){ |
| 4458 | return TRY_CMD_AGAIN; |
| 4459 | } |
| 4460 | |
| 4461 | /* This way a command is guaranteed to be executed for |
| 4462 | * a specific lcn, the network interface is bound to. */ |
| 4463 | usr_cmd->cmd.lcn = chan->common.lcn; |
| 4464 | |
| 4465 | |
| 4466 | /* If channel is pvc, instead of place call |
| 4467 | * run x25_channel configuration. If running LAPB HDLC |
| 4468 | * enable communications. |
| 4469 | */ |
| 4470 | if ((!chan->common.svc) && (usr_cmd->cmd.command == X25_PLACE_CALL)){ |
| 4471 | |
| 4472 | if (card->u.x.LAPB_hdlc){ |
| 4473 | DBG_PRINTK(KERN_INFO "LAPB: Connecting\n"); |
| 4474 | connect(card); |
| 4475 | set_chan_state(dev,WAN_CONNECTING); |
| 4476 | return DELAY_RESULT; |
| 4477 | }else{ |
| 4478 | DBG_PRINTK(KERN_INFO "%s: PVC is CONNECTING\n",card->devname); |
| 4479 | if (x25_get_chan_conf(card, chan) == CMD_OK){ |
| 4480 | set_chan_state(dev, WAN_CONNECTED); |
| 4481 | }else{ |
| 4482 | set_chan_state(dev, WAN_DISCONNECTED); |
| 4483 | } |
| 4484 | return RETURN_RESULT; |
| 4485 | } |
| 4486 | } |
| 4487 | |
| 4488 | /* Copy the socket mbox command onto the board */ |
| 4489 | |
| 4490 | memcpy(&mbox->cmd, &usr_cmd->cmd, sizeof(TX25Cmd)); |
| 4491 | if (usr_cmd->cmd.length){ |
| 4492 | memcpy(mbox->data, usr_cmd->data, usr_cmd->cmd.length); |
| 4493 | } |
| 4494 | |
| 4495 | /* Check if command is bad. We need to copy the cmd into |
| 4496 | * the buffer regardless since we return the, mbox to |
| 4497 | * the user */ |
| 4498 | if (bad_cmd){ |
| 4499 | mbox->cmd.result=0x01; |
| 4500 | return RETURN_RESULT; |
| 4501 | } |
| 4502 | |
| 4503 | err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; |
| 4504 | |
| 4505 | if (err != CMD_OK && err != X25RES_NOT_READY) |
| 4506 | x25_error(card, err, usr_cmd->cmd.command, usr_cmd->cmd.lcn); |
| 4507 | |
| 4508 | if (mbox->cmd.result == X25RES_NOT_READY){ |
| 4509 | return TRY_CMD_AGAIN; |
| 4510 | } |
| 4511 | |
| 4512 | switch (mbox->cmd.command){ |
| 4513 | |
| 4514 | case X25_PLACE_CALL: |
| 4515 | |
| 4516 | switch (mbox->cmd.result){ |
| 4517 | |
| 4518 | case CMD_OK: |
| 4519 | |
| 4520 | /* Check if Place call is a wait command or a |
| 4521 | * no wait command */ |
| 4522 | if (atomic_read(&chan->common.command) & 0x80) |
| 4523 | delay=RETURN_RESULT; |
| 4524 | else |
| 4525 | delay=DELAY_RESULT; |
| 4526 | |
| 4527 | |
| 4528 | DBG_PRINTK(KERN_INFO "\n%s: PLACE CALL Binding dev %s to lcn %i\n", |
| 4529 | card->devname,dev->name, mbox->cmd.lcn); |
| 4530 | |
| 4531 | bind_lcn_to_dev (card, dev, mbox->cmd.lcn); |
| 4532 | set_chan_state(dev, WAN_CONNECTING); |
| 4533 | break; |
| 4534 | |
| 4535 | |
| 4536 | default: |
| 4537 | delay=RETURN_RESULT; |
| 4538 | set_chan_state(dev, WAN_DISCONNECTED); |
| 4539 | break; |
| 4540 | } |
| 4541 | break; |
| 4542 | |
| 4543 | case X25_ACCEPT_CALL: |
| 4544 | |
| 4545 | switch (mbox->cmd.result){ |
| 4546 | |
| 4547 | case CMD_OK: |
| 4548 | |
| 4549 | DBG_PRINTK(KERN_INFO "\n%s: ACCEPT Binding dev %s to lcn %i\n", |
| 4550 | card->devname,dev->name,mbox->cmd.lcn); |
| 4551 | |
| 4552 | bind_lcn_to_dev (card, dev, mbox->cmd.lcn); |
| 4553 | |
| 4554 | if (x25_get_chan_conf(card, chan) == CMD_OK){ |
| 4555 | |
| 4556 | set_chan_state(dev, WAN_CONNECTED); |
| 4557 | delay=RETURN_RESULT; |
| 4558 | |
| 4559 | }else{ |
| 4560 | if (x25_clear_call(card, usr_cmd->cmd.lcn, 0, 0) == CMD_OK){ |
| 4561 | /* if clear is successful, wait for clear confirm |
| 4562 | */ |
| 4563 | delay=DELAY_RESULT; |
| 4564 | }else{ |
| 4565 | /* Do not change the state here. If we fail |
| 4566 | * the accept the return code is send up |
| 4567 | *the stack, which will ether retry |
| 4568 | * or clear the call |
| 4569 | */ |
| 4570 | DBG_PRINTK(KERN_INFO |
| 4571 | "%s: ACCEPT: STATE MAY BE CURRUPTED 2 !!!!!\n", |
| 4572 | card->devname); |
| 4573 | delay=RETURN_RESULT; |
| 4574 | } |
| 4575 | } |
| 4576 | break; |
| 4577 | |
| 4578 | |
| 4579 | case X25RES_ASYNC_PACKET: |
| 4580 | delay=TRY_CMD_AGAIN; |
| 4581 | break; |
| 4582 | |
| 4583 | default: |
| 4584 | DBG_PRINTK(KERN_INFO "%s: ACCEPT FAILED\n",card->devname); |
| 4585 | if (x25_clear_call(card, usr_cmd->cmd.lcn, 0, 0) == CMD_OK){ |
| 4586 | delay=DELAY_RESULT; |
| 4587 | }else{ |
| 4588 | /* Do not change the state here. If we fail the accept. The |
| 4589 | * return code is send up the stack, which will ether retry |
| 4590 | * or clear the call */ |
| 4591 | DBG_PRINTK(KERN_INFO |
| 4592 | "%s: ACCEPT: STATE MAY BE CORRUPTED 1 !!!!!\n", |
| 4593 | card->devname); |
| 4594 | delay=RETURN_RESULT; |
| 4595 | } |
| 4596 | } |
| 4597 | break; |
| 4598 | |
| 4599 | case X25_CLEAR_CALL: |
| 4600 | |
| 4601 | switch (mbox->cmd.result){ |
| 4602 | |
| 4603 | case CMD_OK: |
| 4604 | DBG_PRINTK(KERN_INFO |
| 4605 | "CALL CLEAR OK: Dev %s Mbox Lcn %i Chan Lcn %i\n", |
| 4606 | dev->name,mbox->cmd.lcn,chan->common.lcn); |
| 4607 | set_chan_state(dev, WAN_DISCONNECTING); |
| 4608 | delay = DELAY_RESULT; |
| 4609 | break; |
| 4610 | |
| 4611 | case X25RES_CHANNEL_IN_USE: |
| 4612 | case X25RES_ASYNC_PACKET: |
| 4613 | delay = TRY_CMD_AGAIN; |
| 4614 | break; |
| 4615 | |
| 4616 | case X25RES_LINK_NOT_IN_ABM: |
| 4617 | case X25RES_INVAL_LCN: |
| 4618 | case X25RES_INVAL_STATE: |
| 4619 | set_chan_state(dev, WAN_DISCONNECTED); |
| 4620 | delay = RETURN_RESULT; |
| 4621 | break; |
| 4622 | |
| 4623 | default: |
| 4624 | /* If command did not execute because of user |
| 4625 | * fault, do not change the state. This will |
| 4626 | * signal the socket that clear command failed. |
| 4627 | * User can retry or close the socket. |
| 4628 | * When socket gets killed, it will set the |
| 4629 | * chan->disconnect which will signal |
| 4630 | * driver to clear the call */ |
| 4631 | printk(KERN_INFO "%s: Clear Command Failed, Rc %x\n", |
| 4632 | card->devname,mbox->cmd.command); |
| 4633 | delay = RETURN_RESULT; |
| 4634 | } |
| 4635 | break; |
| 4636 | } |
| 4637 | |
| 4638 | return delay; |
| 4639 | } |
| 4640 | |
| 4641 | /*=============================================================== |
| 4642 | * api_incoming_call |
| 4643 | * |
| 4644 | * Pass an incoming call request up the listening |
| 4645 | * sock. If the API sock is not listening reject the |
| 4646 | * call. |
| 4647 | * |
| 4648 | *===============================================================*/ |
| 4649 | |
| 4650 | static int api_incoming_call (sdla_t* card, TX25Mbox *mbox, int lcn) |
| 4651 | { |
| 4652 | struct sk_buff *skb; |
| 4653 | int len = sizeof(TX25Cmd)+mbox->cmd.length; |
| 4654 | |
| 4655 | if (alloc_and_init_skb_buf(card, &skb, len)){ |
| 4656 | printk(KERN_INFO "%s: API incoming call, no memory\n",card->devname); |
| 4657 | return 1; |
| 4658 | } |
| 4659 | |
| 4660 | memcpy(skb_put(skb,len),&mbox->cmd,len); |
| 4661 | |
| 4662 | skb->mac.raw = skb->data; |
| 4663 | skb->protocol = htons(X25_PROT); |
| 4664 | skb->pkt_type = WAN_PACKET_ASYNC; |
| 4665 | |
| 4666 | if (card->func(skb,card->sk) < 0){ |
| 4667 | printk(KERN_INFO "%s: MAJOR ERROR: Failed to send up place call \n",card->devname); |
| 4668 | dev_kfree_skb_any(skb); |
| 4669 | return 1; |
| 4670 | } |
| 4671 | |
| 4672 | return 0; |
| 4673 | } |
| 4674 | |
| 4675 | /*=============================================================== |
| 4676 | * send_delayed_cmd_result |
| 4677 | * |
| 4678 | * Wait commands like PLEACE CALL or CLEAR CALL must wait |
| 4679 | * until the result arrives. This function passes |
| 4680 | * the result to a waiting sock. |
| 4681 | * |
| 4682 | *===============================================================*/ |
| 4683 | static void send_delayed_cmd_result(sdla_t *card, struct net_device *dev, |
| 4684 | TX25Mbox* mbox) |
| 4685 | { |
| 4686 | x25_channel_t *chan = dev->priv; |
| 4687 | mbox_cmd_t *usr_cmd = (mbox_cmd_t *)chan->common.mbox; |
| 4688 | struct sk_buff *skb; |
| 4689 | int len=sizeof(unsigned char); |
| 4690 | |
| 4691 | atomic_set(&chan->common.command,0); |
| 4692 | |
| 4693 | /* If the sock is in the process of unlinking the |
| 4694 | * driver from the socket, we must get out. |
| 4695 | * This never happends but is a sanity check. */ |
| 4696 | if (test_bit(0,&chan->common.common_critical)){ |
| 4697 | return; |
| 4698 | } |
| 4699 | |
| 4700 | if (!usr_cmd || !chan->common.sk || !chan->common.func){ |
| 4701 | DBG_PRINTK(KERN_INFO "Delay result: Sock not bounded sk: %u, func: %u, mbox: %u\n", |
| 4702 | (unsigned int)chan->common.sk, |
| 4703 | (unsigned int)chan->common.func, |
| 4704 | (unsigned int)usr_cmd); |
| 4705 | return; |
| 4706 | } |
| 4707 | |
| 4708 | memcpy(&usr_cmd->cmd, &mbox->cmd, sizeof(TX25Cmd)); |
| 4709 | if (mbox->cmd.length > 0){ |
| 4710 | memcpy(usr_cmd->data, mbox->data, mbox->cmd.length); |
| 4711 | } |
| 4712 | |
| 4713 | if (alloc_and_init_skb_buf(card,&skb,len)){ |
| 4714 | printk(KERN_INFO "Delay result: No sock buffers\n"); |
| 4715 | return; |
| 4716 | } |
| 4717 | |
| 4718 | memcpy(skb_put(skb,len),&mbox->cmd.command,len); |
| 4719 | |
| 4720 | skb->mac.raw = skb->data; |
| 4721 | skb->pkt_type = WAN_PACKET_CMD; |
| 4722 | |
| 4723 | chan->common.func(skb,dev,chan->common.sk); |
| 4724 | } |
| 4725 | |
| 4726 | /*=============================================================== |
| 4727 | * clear_confirm_event |
| 4728 | * |
| 4729 | * Pass the clear confirmation event up the sock. The |
| 4730 | * API will disconnect only after the clear confirmation |
| 4731 | * has been received. |
| 4732 | * |
| 4733 | * Depending on the state, clear confirmation could |
| 4734 | * be an OOB event, or a result of an API command. |
| 4735 | *===============================================================*/ |
| 4736 | |
| 4737 | static int clear_confirm_event (sdla_t *card, TX25Mbox* mb) |
| 4738 | { |
| 4739 | struct net_device *dev; |
| 4740 | x25_channel_t *chan; |
| 4741 | unsigned char old_state; |
| 4742 | |
| 4743 | dev = find_channel(card,mb->cmd.lcn); |
| 4744 | if (!dev){ |
| 4745 | DBG_PRINTK(KERN_INFO "%s: *** GOT CLEAR BUT NO DEV %i\n", |
| 4746 | card->devname,mb->cmd.lcn); |
| 4747 | return 0; |
| 4748 | } |
| 4749 | |
| 4750 | chan=dev->priv; |
| 4751 | DBG_PRINTK(KERN_INFO "%s: GOT CLEAR CONFIRM %s: Mbox lcn %i Chan lcn %i\n", |
| 4752 | card->devname, dev->name, mb->cmd.lcn, chan->common.lcn); |
| 4753 | |
| 4754 | /* If not API fall through to default. |
| 4755 | * If API, send the result to a waiting |
| 4756 | * socket. |
| 4757 | */ |
| 4758 | |
| 4759 | old_state = chan->common.state; |
| 4760 | set_chan_state(dev, WAN_DISCONNECTED); |
| 4761 | |
| 4762 | if (chan->common.usedby == API){ |
| 4763 | switch (old_state) { |
| 4764 | |
| 4765 | case WAN_DISCONNECTING: |
| 4766 | case WAN_CONNECTING: |
| 4767 | send_delayed_cmd_result(card,dev,mb); |
| 4768 | break; |
| 4769 | case WAN_CONNECTED: |
| 4770 | send_oob_msg(card,dev,mb); |
| 4771 | break; |
| 4772 | } |
| 4773 | return 1; |
| 4774 | } |
| 4775 | |
| 4776 | return 0; |
| 4777 | } |
| 4778 | |
| 4779 | /*=============================================================== |
| 4780 | * send_oob_msg |
| 4781 | * |
| 4782 | * Construct an NEM Message and pass it up the connected |
| 4783 | * sock. If the sock is not bounded discard the NEM. |
| 4784 | * |
| 4785 | *===============================================================*/ |
| 4786 | |
| 4787 | static void send_oob_msg(sdla_t *card, struct net_device *dev, TX25Mbox *mbox) |
| 4788 | { |
| 4789 | x25_channel_t *chan = dev->priv; |
| 4790 | mbox_cmd_t *usr_cmd = (mbox_cmd_t *)chan->common.mbox; |
| 4791 | struct sk_buff *skb; |
| 4792 | int len=sizeof(x25api_hdr_t)+mbox->cmd.length; |
| 4793 | x25api_t *api_hdr; |
| 4794 | |
| 4795 | /* If the sock is in the process of unlinking the |
| 4796 | * driver from the socket, we must get out. |
| 4797 | * This never happends but is a sanity check. */ |
| 4798 | if (test_bit(0,&chan->common.common_critical)){ |
| 4799 | return; |
| 4800 | } |
| 4801 | |
| 4802 | if (!usr_cmd || !chan->common.sk || !chan->common.func){ |
| 4803 | DBG_PRINTK(KERN_INFO "OOB MSG: Sock not bounded\n"); |
| 4804 | return; |
| 4805 | } |
| 4806 | |
| 4807 | memcpy(&usr_cmd->cmd, &mbox->cmd, sizeof(TX25Cmd)); |
| 4808 | if (mbox->cmd.length > 0){ |
| 4809 | memcpy(usr_cmd->data, mbox->data, mbox->cmd.length); |
| 4810 | } |
| 4811 | |
| 4812 | if (alloc_and_init_skb_buf(card,&skb,len)){ |
| 4813 | printk(KERN_INFO "%s: OOB MSG: No sock buffers\n",card->devname); |
| 4814 | return; |
| 4815 | } |
| 4816 | |
| 4817 | api_hdr = (x25api_t*)skb_put(skb,len); |
| 4818 | api_hdr->hdr.pktType = mbox->cmd.pktType & 0x7F; |
| 4819 | api_hdr->hdr.qdm = mbox->cmd.qdm; |
| 4820 | api_hdr->hdr.cause = mbox->cmd.cause; |
| 4821 | api_hdr->hdr.diagn = mbox->cmd.diagn; |
| 4822 | api_hdr->hdr.length = mbox->cmd.length; |
| 4823 | api_hdr->hdr.result = mbox->cmd.result; |
| 4824 | api_hdr->hdr.lcn = mbox->cmd.lcn; |
| 4825 | |
| 4826 | if (mbox->cmd.length > 0){ |
| 4827 | memcpy(api_hdr->data,mbox->data,mbox->cmd.length); |
| 4828 | } |
| 4829 | |
| 4830 | skb->mac.raw = skb->data; |
| 4831 | skb->pkt_type = WAN_PACKET_ERR; |
| 4832 | |
| 4833 | if (chan->common.func(skb,dev,chan->common.sk) < 0){ |
| 4834 | if (bh_enqueue(dev,skb)){ |
| 4835 | printk(KERN_INFO "%s: Dropping OOB MSG\n",card->devname); |
| 4836 | dev_kfree_skb_any(skb); |
| 4837 | } |
| 4838 | } |
| 4839 | |
| 4840 | DBG_PRINTK(KERN_INFO "%s: OOB MSG OK, %s, lcn %i\n", |
| 4841 | card->devname, dev->name, mbox->cmd.lcn); |
| 4842 | } |
| 4843 | |
| 4844 | /*=============================================================== |
| 4845 | * alloc_and_init_skb_buf |
| 4846 | * |
| 4847 | * Allocate and initialize an skb buffer. |
| 4848 | * |
| 4849 | *===============================================================*/ |
| 4850 | |
| 4851 | static int alloc_and_init_skb_buf (sdla_t *card, struct sk_buff **skb, int len) |
| 4852 | { |
| 4853 | struct sk_buff *new_skb = *skb; |
| 4854 | |
| 4855 | new_skb = dev_alloc_skb(len + X25_HRDHDR_SZ); |
| 4856 | if (new_skb == NULL){ |
| 4857 | printk(KERN_INFO "%s: no socket buffers available!\n", |
| 4858 | card->devname); |
| 4859 | return 1; |
| 4860 | } |
| 4861 | |
| 4862 | if (skb_tailroom(new_skb) < len){ |
| 4863 | /* No room for the packet. Call off the whole thing! */ |
| 4864 | dev_kfree_skb_any(new_skb); |
| 4865 | printk(KERN_INFO "%s: Listen: unexpectedly long packet sequence\n" |
| 4866 | ,card->devname); |
| 4867 | *skb = NULL; |
| 4868 | return 1; |
| 4869 | } |
| 4870 | |
| 4871 | *skb = new_skb; |
| 4872 | return 0; |
| 4873 | |
| 4874 | } |
| 4875 | |
| 4876 | /*=============================================================== |
| 4877 | * api_oob_event |
| 4878 | * |
| 4879 | * Send an OOB event up to the sock |
| 4880 | * |
| 4881 | *===============================================================*/ |
| 4882 | |
| 4883 | static void api_oob_event (sdla_t *card,TX25Mbox *mbox) |
| 4884 | { |
| 4885 | struct net_device *dev = find_channel(card, mbox->cmd.lcn); |
| 4886 | x25_channel_t *chan; |
| 4887 | |
| 4888 | if (!dev) |
| 4889 | return; |
| 4890 | |
| 4891 | chan=dev->priv; |
| 4892 | |
| 4893 | if (chan->common.usedby == API) |
| 4894 | send_oob_msg(card,dev,mbox); |
| 4895 | |
| 4896 | } |
| 4897 | |
| 4898 | |
| 4899 | |
| 4900 | |
| 4901 | static int channel_disconnect(sdla_t* card, struct net_device *dev) |
| 4902 | { |
| 4903 | |
| 4904 | int err; |
| 4905 | x25_channel_t *chan = dev->priv; |
| 4906 | |
| 4907 | DBG_PRINTK(KERN_INFO "%s: TIMER: %s, Device down disconnecting\n", |
| 4908 | card->devname,dev->name); |
| 4909 | |
| 4910 | if (chan->common.svc){ |
| 4911 | err = x25_clear_call(card,chan->common.lcn,0,0); |
| 4912 | }else{ |
| 4913 | /* If channel is PVC or LAPB HDLC, there is no call |
| 4914 | * to be cleared, thus drop down to the default |
| 4915 | * area |
| 4916 | */ |
| 4917 | err = 1; |
| 4918 | } |
| 4919 | |
| 4920 | switch (err){ |
| 4921 | |
| 4922 | case X25RES_CHANNEL_IN_USE: |
| 4923 | case X25RES_NOT_READY: |
| 4924 | err = TRY_CMD_AGAIN; |
| 4925 | break; |
| 4926 | case CMD_OK: |
| 4927 | DBG_PRINTK(KERN_INFO "CALL CLEAR OK: Dev %s Chan Lcn %i\n", |
| 4928 | dev->name,chan->common.lcn); |
| 4929 | |
| 4930 | set_chan_state(dev,WAN_DISCONNECTING); |
| 4931 | atomic_set(&chan->common.command,0); |
| 4932 | err = DELAY_RESULT; |
| 4933 | break; |
| 4934 | default: |
| 4935 | /* If LAPB HDLC protocol, bring the whole link down |
| 4936 | * once the application terminates |
| 4937 | */ |
| 4938 | |
| 4939 | set_chan_state(dev,WAN_DISCONNECTED); |
| 4940 | |
| 4941 | if (card->u.x.LAPB_hdlc){ |
| 4942 | DBG_PRINTK(KERN_INFO "LAPB: Disconnecting Link\n"); |
| 4943 | hdlc_link_down (card); |
| 4944 | } |
| 4945 | atomic_set(&chan->common.command,0); |
| 4946 | err = RETURN_RESULT; |
| 4947 | break; |
| 4948 | } |
| 4949 | |
| 4950 | return err; |
| 4951 | } |
| 4952 | |
| 4953 | static void hdlc_link_down (sdla_t *card) |
| 4954 | { |
| 4955 | TX25Mbox* mbox = card->mbox; |
| 4956 | int retry = 5; |
| 4957 | int err=0; |
| 4958 | |
| 4959 | do { |
| 4960 | memset(mbox,0,sizeof(TX25Mbox)); |
| 4961 | mbox->cmd.command = X25_HDLC_LINK_DISC; |
| 4962 | mbox->cmd.length = 1; |
| 4963 | mbox->data[0]=0; |
| 4964 | err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; |
| 4965 | |
| 4966 | } while (err && retry-- && x25_error(card, err, X25_HDLC_LINK_DISC, 0)); |
| 4967 | |
| 4968 | if (err) |
| 4969 | printk(KERN_INFO "%s: Hdlc Link Down Failed %x\n",card->devname,err); |
| 4970 | |
| 4971 | disconnect (card); |
| 4972 | |
| 4973 | } |
| 4974 | |
| 4975 | static int check_bad_command(sdla_t* card, struct net_device *dev) |
| 4976 | { |
| 4977 | x25_channel_t *chan = dev->priv; |
| 4978 | int bad_cmd = 0; |
| 4979 | |
| 4980 | switch (atomic_read(&chan->common.command)&0x7F){ |
| 4981 | |
| 4982 | case X25_PLACE_CALL: |
| 4983 | if (chan->common.state != WAN_DISCONNECTED) |
| 4984 | bad_cmd=1; |
| 4985 | break; |
| 4986 | case X25_CLEAR_CALL: |
| 4987 | if (chan->common.state == WAN_DISCONNECTED) |
| 4988 | bad_cmd=1; |
| 4989 | break; |
| 4990 | case X25_ACCEPT_CALL: |
| 4991 | if (chan->common.state != WAN_CONNECTING) |
| 4992 | bad_cmd=1; |
| 4993 | break; |
| 4994 | case X25_RESET: |
| 4995 | if (chan->common.state != WAN_CONNECTED) |
| 4996 | bad_cmd=1; |
| 4997 | break; |
| 4998 | default: |
| 4999 | bad_cmd=1; |
| 5000 | break; |
| 5001 | } |
| 5002 | |
| 5003 | if (bad_cmd){ |
| 5004 | printk(KERN_INFO "%s: Invalid State, BAD Command %x, dev %s, lcn %i, st %i\n", |
| 5005 | card->devname,atomic_read(&chan->common.command),dev->name, |
| 5006 | chan->common.lcn, chan->common.state); |
| 5007 | } |
| 5008 | |
| 5009 | return bad_cmd; |
| 5010 | } |
| 5011 | |
| 5012 | |
| 5013 | |
| 5014 | /*************************** XPIPEMON FUNCTIONS **************************/ |
| 5015 | |
| 5016 | /*============================================================================== |
| 5017 | * Process UDP call of type XPIPE |
| 5018 | */ |
| 5019 | |
| 5020 | static int process_udp_mgmt_pkt(sdla_t *card) |
| 5021 | { |
| 5022 | int c_retry = MAX_CMD_RETRY; |
| 5023 | unsigned int len; |
| 5024 | struct sk_buff *new_skb; |
| 5025 | TX25Mbox *mbox = card->mbox; |
| 5026 | int err; |
| 5027 | int udp_mgmt_req_valid = 1; |
| 5028 | struct net_device *dev; |
| 5029 | x25_channel_t *chan; |
| 5030 | unsigned short lcn; |
| 5031 | struct timeval tv; |
| 5032 | |
| 5033 | |
| 5034 | x25_udp_pkt_t *x25_udp_pkt; |
| 5035 | x25_udp_pkt = (x25_udp_pkt_t *)card->u.x.udp_pkt_data; |
| 5036 | |
| 5037 | dev = card->u.x.udp_dev; |
| 5038 | chan = dev->priv; |
| 5039 | lcn = chan->common.lcn; |
| 5040 | |
| 5041 | switch(x25_udp_pkt->cblock.command) { |
| 5042 | |
| 5043 | /* XPIPE_ENABLE_TRACE */ |
| 5044 | case XPIPE_ENABLE_TRACING: |
| 5045 | |
| 5046 | /* XPIPE_GET_TRACE_INFO */ |
| 5047 | case XPIPE_GET_TRACE_INFO: |
| 5048 | |
| 5049 | /* SET FT1 MODE */ |
| 5050 | case XPIPE_SET_FT1_MODE: |
| 5051 | |
| 5052 | if(card->u.x.udp_pkt_src == UDP_PKT_FRM_NETWORK) { |
| 5053 | ++chan->pipe_mgmt_stat.UDP_PIPE_mgmt_direction_err; |
| 5054 | udp_mgmt_req_valid = 0; |
| 5055 | break; |
| 5056 | } |
| 5057 | |
| 5058 | /* XPIPE_FT1_READ_STATUS */ |
| 5059 | case XPIPE_FT1_READ_STATUS: |
| 5060 | |
| 5061 | /* FT1 MONITOR STATUS */ |
| 5062 | case XPIPE_FT1_STATUS_CTRL: |
| 5063 | if(card->hw.fwid != SFID_X25_508) { |
| 5064 | ++chan->pipe_mgmt_stat.UDP_PIPE_mgmt_adptr_type_err; |
| 5065 | udp_mgmt_req_valid = 0; |
| 5066 | break; |
| 5067 | } |
| 5068 | default: |
| 5069 | break; |
| 5070 | } |
| 5071 | |
| 5072 | if(!udp_mgmt_req_valid) { |
| 5073 | /* set length to 0 */ |
| 5074 | x25_udp_pkt->cblock.length = 0; |
| 5075 | /* set return code */ |
| 5076 | x25_udp_pkt->cblock.result = (card->hw.fwid != SFID_X25_508) ? 0x1F : 0xCD; |
| 5077 | |
| 5078 | } else { |
| 5079 | |
| 5080 | switch (x25_udp_pkt->cblock.command) { |
| 5081 | |
| 5082 | |
| 5083 | case XPIPE_FLUSH_DRIVER_STATS: |
| 5084 | init_x25_channel_struct(chan); |
| 5085 | init_global_statistics(card); |
| 5086 | mbox->cmd.length = 0; |
| 5087 | break; |
| 5088 | |
| 5089 | |
| 5090 | case XPIPE_DRIVER_STAT_IFSEND: |
| 5091 | memcpy(x25_udp_pkt->data, &chan->if_send_stat, sizeof(if_send_stat_t)); |
| 5092 | mbox->cmd.length = sizeof(if_send_stat_t); |
| 5093 | x25_udp_pkt->cblock.length = mbox->cmd.length; |
| 5094 | break; |
| 5095 | |
| 5096 | case XPIPE_DRIVER_STAT_INTR: |
| 5097 | memcpy(&x25_udp_pkt->data[0], &card->statistics, sizeof(global_stats_t)); |
| 5098 | memcpy(&x25_udp_pkt->data[sizeof(global_stats_t)], |
| 5099 | &chan->rx_intr_stat, sizeof(rx_intr_stat_t)); |
| 5100 | |
| 5101 | mbox->cmd.length = sizeof(global_stats_t) + |
| 5102 | sizeof(rx_intr_stat_t); |
| 5103 | x25_udp_pkt->cblock.length = mbox->cmd.length; |
| 5104 | break; |
| 5105 | |
| 5106 | case XPIPE_DRIVER_STAT_GEN: |
| 5107 | memcpy(x25_udp_pkt->data, |
| 5108 | &chan->pipe_mgmt_stat.UDP_PIPE_mgmt_kmalloc_err, |
| 5109 | sizeof(pipe_mgmt_stat_t)); |
| 5110 | |
| 5111 | memcpy(&x25_udp_pkt->data[sizeof(pipe_mgmt_stat_t)], |
| 5112 | &card->statistics, sizeof(global_stats_t)); |
| 5113 | |
| 5114 | x25_udp_pkt->cblock.result = 0; |
| 5115 | x25_udp_pkt->cblock.length = sizeof(global_stats_t)+ |
| 5116 | sizeof(rx_intr_stat_t); |
| 5117 | mbox->cmd.length = x25_udp_pkt->cblock.length; |
| 5118 | break; |
| 5119 | |
| 5120 | case XPIPE_ROUTER_UP_TIME: |
| 5121 | do_gettimeofday(&tv); |
| 5122 | chan->router_up_time = tv.tv_sec - chan->router_start_time; |
| 5123 | *(unsigned long *)&x25_udp_pkt->data = chan->router_up_time; |
| 5124 | x25_udp_pkt->cblock.length = mbox->cmd.length = 4; |
| 5125 | x25_udp_pkt->cblock.result = 0; |
| 5126 | break; |
| 5127 | |
| 5128 | default : |
| 5129 | |
| 5130 | do { |
| 5131 | memcpy(&mbox->cmd, &x25_udp_pkt->cblock.command, sizeof(TX25Cmd)); |
| 5132 | if(mbox->cmd.length){ |
| 5133 | memcpy(&mbox->data, |
| 5134 | (char *)x25_udp_pkt->data, |
| 5135 | mbox->cmd.length); |
| 5136 | } |
| 5137 | |
| 5138 | err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; |
| 5139 | } while (err && c_retry-- && x25_error(card, err, mbox->cmd.command, 0)); |
| 5140 | |
| 5141 | |
| 5142 | if ( err == CMD_OK || |
| 5143 | (err == 1 && |
| 5144 | (mbox->cmd.command == 0x06 || |
| 5145 | mbox->cmd.command == 0x16) ) ){ |
| 5146 | |
| 5147 | ++chan->pipe_mgmt_stat.UDP_PIPE_mgmt_adptr_cmnd_OK; |
| 5148 | } else { |
| 5149 | ++chan->pipe_mgmt_stat.UDP_PIPE_mgmt_adptr_cmnd_timeout; |
| 5150 | } |
| 5151 | |
| 5152 | /* copy the result back to our buffer */ |
| 5153 | memcpy(&x25_udp_pkt->cblock.command, &mbox->cmd, sizeof(TX25Cmd)); |
| 5154 | |
| 5155 | if(mbox->cmd.length) { |
| 5156 | memcpy(&x25_udp_pkt->data, &mbox->data, mbox->cmd.length); |
| 5157 | } |
| 5158 | break; |
| 5159 | |
| 5160 | } //switch |
| 5161 | |
| 5162 | } |
| 5163 | |
| 5164 | /* Fill UDP TTL */ |
| 5165 | |
| 5166 | x25_udp_pkt->ip_pkt.ttl = card->wandev.ttl; |
| 5167 | len = reply_udp(card->u.x.udp_pkt_data, mbox->cmd.length); |
| 5168 | |
| 5169 | |
| 5170 | if(card->u.x.udp_pkt_src == UDP_PKT_FRM_NETWORK) { |
| 5171 | |
| 5172 | err = x25_send(card, lcn, 0, len, card->u.x.udp_pkt_data); |
| 5173 | if (!err) |
| 5174 | ++chan->pipe_mgmt_stat.UDP_PIPE_mgmt_adptr_send_passed; |
| 5175 | else |
| 5176 | ++chan->pipe_mgmt_stat.UDP_PIPE_mgmt_adptr_send_failed; |
| 5177 | |
| 5178 | } else { |
| 5179 | |
| 5180 | /* Allocate socket buffer */ |
| 5181 | if((new_skb = dev_alloc_skb(len)) != NULL) { |
| 5182 | void *buf; |
| 5183 | |
| 5184 | /* copy data into new_skb */ |
| 5185 | buf = skb_put(new_skb, len); |
| 5186 | memcpy(buf, card->u.x.udp_pkt_data, len); |
| 5187 | |
| 5188 | /* Decapsulate packet and pass it up the protocol |
| 5189 | stack */ |
| 5190 | new_skb->dev = dev; |
| 5191 | |
| 5192 | if (chan->common.usedby == API) |
| 5193 | new_skb->protocol = htons(X25_PROT); |
| 5194 | else |
| 5195 | new_skb->protocol = htons(ETH_P_IP); |
| 5196 | |
| 5197 | new_skb->mac.raw = new_skb->data; |
| 5198 | |
| 5199 | netif_rx(new_skb); |
| 5200 | ++chan->pipe_mgmt_stat.UDP_PIPE_mgmt_passed_to_stack; |
| 5201 | |
| 5202 | } else { |
| 5203 | ++chan->pipe_mgmt_stat.UDP_PIPE_mgmt_no_socket; |
| 5204 | printk(KERN_INFO |
| 5205 | "%s: UDP mgmt cmnd, no socket buffers available!\n", |
| 5206 | card->devname); |
| 5207 | } |
| 5208 | } |
| 5209 | |
| 5210 | card->u.x.udp_pkt_lgth = 0; |
| 5211 | |
| 5212 | return 1; |
| 5213 | } |
| 5214 | |
| 5215 | |
| 5216 | /*============================================================================== |
| 5217 | * Determine what type of UDP call it is. DRVSTATS or XPIPE8ND ? |
| 5218 | */ |
| 5219 | static int udp_pkt_type( struct sk_buff *skb, sdla_t* card ) |
| 5220 | { |
| 5221 | x25_udp_pkt_t *x25_udp_pkt = (x25_udp_pkt_t *)skb->data; |
| 5222 | |
| 5223 | if((x25_udp_pkt->ip_pkt.protocol == UDPMGMT_UDP_PROTOCOL) && |
| 5224 | (x25_udp_pkt->ip_pkt.ver_inet_hdr_length == 0x45) && |
| 5225 | (x25_udp_pkt->udp_pkt.udp_dst_port == ntohs(card->wandev.udp_port)) && |
| 5226 | (x25_udp_pkt->wp_mgmt.request_reply == UDPMGMT_REQUEST)) { |
| 5227 | |
| 5228 | if(!strncmp(x25_udp_pkt->wp_mgmt.signature, |
| 5229 | UDPMGMT_XPIPE_SIGNATURE, 8)){ |
| 5230 | return UDP_XPIPE_TYPE; |
| 5231 | }else{ |
| 5232 | printk(KERN_INFO "%s: UDP Packet, Failed Signature !\n", |
| 5233 | card->devname); |
| 5234 | } |
| 5235 | } |
| 5236 | |
| 5237 | return UDP_INVALID_TYPE; |
| 5238 | } |
| 5239 | |
| 5240 | |
| 5241 | /*============================================================================ |
| 5242 | * Reply to UDP Management system. |
| 5243 | * Return nothing. |
| 5244 | */ |
| 5245 | static int reply_udp( unsigned char *data, unsigned int mbox_len ) |
| 5246 | { |
| 5247 | unsigned short len, udp_length, temp, ip_length; |
| 5248 | unsigned long ip_temp; |
| 5249 | int even_bound = 0; |
| 5250 | |
| 5251 | |
| 5252 | x25_udp_pkt_t *x25_udp_pkt = (x25_udp_pkt_t *)data; |
| 5253 | |
| 5254 | /* Set length of packet */ |
| 5255 | len = sizeof(ip_pkt_t)+ |
| 5256 | sizeof(udp_pkt_t)+ |
| 5257 | sizeof(wp_mgmt_t)+ |
| 5258 | sizeof(cblock_t)+ |
| 5259 | mbox_len; |
| 5260 | |
| 5261 | |
| 5262 | /* fill in UDP reply */ |
| 5263 | x25_udp_pkt->wp_mgmt.request_reply = UDPMGMT_REPLY; |
| 5264 | |
| 5265 | /* fill in UDP length */ |
| 5266 | udp_length = sizeof(udp_pkt_t)+ |
| 5267 | sizeof(wp_mgmt_t)+ |
| 5268 | sizeof(cblock_t)+ |
| 5269 | mbox_len; |
| 5270 | |
| 5271 | |
| 5272 | /* put it on an even boundary */ |
| 5273 | if ( udp_length & 0x0001 ) { |
| 5274 | udp_length += 1; |
| 5275 | len += 1; |
| 5276 | even_bound = 1; |
| 5277 | } |
| 5278 | |
| 5279 | temp = (udp_length<<8)|(udp_length>>8); |
| 5280 | x25_udp_pkt->udp_pkt.udp_length = temp; |
| 5281 | |
| 5282 | /* swap UDP ports */ |
| 5283 | temp = x25_udp_pkt->udp_pkt.udp_src_port; |
| 5284 | x25_udp_pkt->udp_pkt.udp_src_port = |
| 5285 | x25_udp_pkt->udp_pkt.udp_dst_port; |
| 5286 | x25_udp_pkt->udp_pkt.udp_dst_port = temp; |
| 5287 | |
| 5288 | |
| 5289 | |
| 5290 | /* add UDP pseudo header */ |
| 5291 | temp = 0x1100; |
| 5292 | *((unsigned short *) |
| 5293 | (x25_udp_pkt->data+mbox_len+even_bound)) = temp; |
| 5294 | temp = (udp_length<<8)|(udp_length>>8); |
| 5295 | *((unsigned short *) |
| 5296 | (x25_udp_pkt->data+mbox_len+even_bound+2)) = temp; |
| 5297 | |
| 5298 | /* calculate UDP checksum */ |
| 5299 | x25_udp_pkt->udp_pkt.udp_checksum = 0; |
| 5300 | |
| 5301 | x25_udp_pkt->udp_pkt.udp_checksum = |
| 5302 | calc_checksum(&data[UDP_OFFSET], udp_length+UDP_OFFSET); |
| 5303 | |
| 5304 | /* fill in IP length */ |
| 5305 | ip_length = len; |
| 5306 | temp = (ip_length<<8)|(ip_length>>8); |
| 5307 | x25_udp_pkt->ip_pkt.total_length = temp; |
| 5308 | |
| 5309 | /* swap IP addresses */ |
| 5310 | ip_temp = x25_udp_pkt->ip_pkt.ip_src_address; |
| 5311 | x25_udp_pkt->ip_pkt.ip_src_address = |
| 5312 | x25_udp_pkt->ip_pkt.ip_dst_address; |
| 5313 | x25_udp_pkt->ip_pkt.ip_dst_address = ip_temp; |
| 5314 | |
| 5315 | |
| 5316 | /* fill in IP checksum */ |
| 5317 | x25_udp_pkt->ip_pkt.hdr_checksum = 0; |
| 5318 | x25_udp_pkt->ip_pkt.hdr_checksum = calc_checksum(data, sizeof(ip_pkt_t)); |
| 5319 | |
| 5320 | return len; |
| 5321 | } /* reply_udp */ |
| 5322 | |
| 5323 | unsigned short calc_checksum (char *data, int len) |
| 5324 | { |
| 5325 | unsigned short temp; |
| 5326 | unsigned long sum=0; |
| 5327 | int i; |
| 5328 | |
| 5329 | for( i = 0; i <len; i+=2 ) { |
| 5330 | memcpy(&temp,&data[i],2); |
| 5331 | sum += (unsigned long)temp; |
| 5332 | } |
| 5333 | |
| 5334 | while (sum >> 16 ) { |
| 5335 | sum = (sum & 0xffffUL) + (sum >> 16); |
| 5336 | } |
| 5337 | |
| 5338 | temp = (unsigned short)sum; |
| 5339 | temp = ~temp; |
| 5340 | |
| 5341 | if( temp == 0 ) |
| 5342 | temp = 0xffff; |
| 5343 | |
| 5344 | return temp; |
| 5345 | } |
| 5346 | |
| 5347 | /*============================================================================= |
| 5348 | * Store a UDP management packet for later processing. |
| 5349 | */ |
| 5350 | |
| 5351 | static int store_udp_mgmt_pkt(int udp_type, char udp_pkt_src, sdla_t* card, |
| 5352 | struct net_device *dev, struct sk_buff *skb, |
| 5353 | int lcn) |
| 5354 | { |
| 5355 | int udp_pkt_stored = 0; |
| 5356 | |
| 5357 | if(!card->u.x.udp_pkt_lgth && (skb->len <= MAX_LGTH_UDP_MGNT_PKT)){ |
| 5358 | card->u.x.udp_pkt_lgth = skb->len; |
| 5359 | card->u.x.udp_type = udp_type; |
| 5360 | card->u.x.udp_pkt_src = udp_pkt_src; |
| 5361 | card->u.x.udp_lcn = lcn; |
| 5362 | card->u.x.udp_dev = dev; |
| 5363 | memcpy(card->u.x.udp_pkt_data, skb->data, skb->len); |
| 5364 | card->u.x.timer_int_enabled |= TMR_INT_ENABLED_UDP_PKT; |
| 5365 | udp_pkt_stored = 1; |
| 5366 | |
| 5367 | }else{ |
| 5368 | printk(KERN_INFO "%s: ERROR: UDP packet not stored for LCN %d\n", |
| 5369 | card->devname,lcn); |
| 5370 | } |
| 5371 | |
| 5372 | if(udp_pkt_src == UDP_PKT_FRM_STACK){ |
| 5373 | dev_kfree_skb_any(skb); |
| 5374 | }else{ |
| 5375 | dev_kfree_skb_any(skb); |
| 5376 | } |
| 5377 | |
| 5378 | return(udp_pkt_stored); |
| 5379 | } |
| 5380 | |
| 5381 | |
| 5382 | |
| 5383 | /*============================================================================= |
| 5384 | * Initial the ppp_private_area structure. |
| 5385 | */ |
| 5386 | static void init_x25_channel_struct( x25_channel_t *chan ) |
| 5387 | { |
| 5388 | memset(&chan->if_send_stat.if_send_entry,0,sizeof(if_send_stat_t)); |
| 5389 | memset(&chan->rx_intr_stat.rx_intr_no_socket,0,sizeof(rx_intr_stat_t)); |
| 5390 | memset(&chan->pipe_mgmt_stat.UDP_PIPE_mgmt_kmalloc_err,0,sizeof(pipe_mgmt_stat_t)); |
| 5391 | } |
| 5392 | |
| 5393 | /*============================================================================ |
| 5394 | * Initialize Global Statistics |
| 5395 | */ |
| 5396 | static void init_global_statistics( sdla_t *card ) |
| 5397 | { |
| 5398 | memset(&card->statistics.isr_entry,0,sizeof(global_stats_t)); |
| 5399 | } |
| 5400 | |
| 5401 | |
| 5402 | /*=============================================================== |
| 5403 | * SMP Support |
| 5404 | * ==============================================================*/ |
| 5405 | |
| 5406 | static void S508_S514_lock(sdla_t *card, unsigned long *smp_flags) |
| 5407 | { |
| 5408 | spin_lock_irqsave(&card->wandev.lock, *smp_flags); |
| 5409 | } |
| 5410 | static void S508_S514_unlock(sdla_t *card, unsigned long *smp_flags) |
| 5411 | { |
| 5412 | spin_unlock_irqrestore(&card->wandev.lock, *smp_flags); |
| 5413 | } |
| 5414 | |
| 5415 | /*=============================================================== |
| 5416 | * x25_timer_routine |
| 5417 | * |
| 5418 | * A more efficient polling routine. Each half a second |
| 5419 | * queue a polling task. We want to do the polling in a |
| 5420 | * task not timer, because timer runs in interrupt time. |
| 5421 | * |
| 5422 | * FIXME Polling should be rethinked. |
| 5423 | *==============================================================*/ |
| 5424 | |
| 5425 | static void x25_timer_routine(unsigned long data) |
| 5426 | { |
| 5427 | sdla_t *card = (sdla_t*)data; |
| 5428 | |
| 5429 | if (!card->wandev.dev){ |
| 5430 | printk(KERN_INFO "%s: Stopping the X25 Poll Timer: No Dev.\n", |
| 5431 | card->devname); |
| 5432 | return; |
| 5433 | } |
| 5434 | |
| 5435 | if (card->open_cnt != card->u.x.num_of_ch){ |
| 5436 | printk(KERN_INFO "%s: Stopping the X25 Poll Timer: Interface down.\n", |
| 5437 | card->devname); |
| 5438 | return; |
| 5439 | } |
| 5440 | |
| 5441 | if (test_bit(PERI_CRIT,&card->wandev.critical)){ |
| 5442 | printk(KERN_INFO "%s: Stopping the X25 Poll Timer: Shutting down.\n", |
| 5443 | card->devname); |
| 5444 | return; |
| 5445 | } |
| 5446 | |
| 5447 | if (!test_and_set_bit(POLL_CRIT,&card->wandev.critical)){ |
| 5448 | trigger_x25_poll(card); |
| 5449 | } |
| 5450 | |
| 5451 | card->u.x.x25_timer.expires=jiffies+(HZ>>1); |
| 5452 | add_timer(&card->u.x.x25_timer); |
| 5453 | return; |
| 5454 | } |
| 5455 | |
| 5456 | void disable_comm_shutdown(sdla_t *card) |
| 5457 | { |
| 5458 | TX25Mbox* mbox = card->mbox; |
| 5459 | int err; |
| 5460 | |
| 5461 | /* Turn of interrutps */ |
| 5462 | mbox->data[0] = 0; |
| 5463 | if (card->hw.fwid == SFID_X25_508){ |
| 5464 | mbox->data[1] = card->hw.irq; |
| 5465 | mbox->data[2] = 2; |
| 5466 | mbox->cmd.length = 3; |
| 5467 | }else { |
| 5468 | mbox->cmd.length = 1; |
| 5469 | } |
| 5470 | mbox->cmd.command = X25_SET_INTERRUPT_MODE; |
| 5471 | err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; |
| 5472 | if (err) |
| 5473 | printk(KERN_INFO "INTERRUPT OFF FAIED %x\n",err); |
| 5474 | |
| 5475 | /* Bring down HDLC */ |
| 5476 | mbox->cmd.command = X25_HDLC_LINK_CLOSE; |
| 5477 | mbox->cmd.length = 0; |
| 5478 | err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; |
| 5479 | if (err) |
| 5480 | printk(KERN_INFO "LINK CLOSED FAILED %x\n",err); |
| 5481 | |
| 5482 | |
| 5483 | /* Brind down DTR */ |
| 5484 | mbox->data[0] = 0; |
| 5485 | mbox->data[2] = 0; |
| 5486 | mbox->data[1] = 0x01; |
| 5487 | mbox->cmd.length = 3; |
| 5488 | mbox->cmd.command = X25_SET_GLOBAL_VARS; |
| 5489 | err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; |
| 5490 | if (err) |
| 5491 | printk(KERN_INFO "DTR DOWN FAILED %x\n",err); |
| 5492 | |
| 5493 | } |
| 5494 | |
| 5495 | MODULE_LICENSE("GPL"); |
| 5496 | |
| 5497 | /****** End *****************************************************************/ |