Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | |
| 2 | /* |
| 3 | * DECnet An implementation of the DECnet protocol suite for the LINUX |
| 4 | * operating system. DECnet is implemented using the BSD Socket |
| 5 | * interface as the means of communication with the user level. |
| 6 | * |
| 7 | * DECnet Socket Layer Interface |
| 8 | * |
| 9 | * Authors: Eduardo Marcelo Serrat <emserrat@geocities.com> |
| 10 | * Patrick Caulfield <patrick@pandh.demon.co.uk> |
| 11 | * |
| 12 | * Changes: |
| 13 | * Steve Whitehouse: Copied from Eduardo Serrat and Patrick Caulfield's |
| 14 | * version of the code. Original copyright preserved |
| 15 | * below. |
| 16 | * Steve Whitehouse: Some bug fixes, cleaning up some code to make it |
| 17 | * compatible with my routing layer. |
| 18 | * Steve Whitehouse: Merging changes from Eduardo Serrat and Patrick |
| 19 | * Caulfield. |
| 20 | * Steve Whitehouse: Further bug fixes, checking module code still works |
| 21 | * with new routing layer. |
| 22 | * Steve Whitehouse: Additional set/get_sockopt() calls. |
| 23 | * Steve Whitehouse: Fixed TIOCINQ ioctl to be same as Eduardo's new |
| 24 | * code. |
| 25 | * Steve Whitehouse: recvmsg() changed to try and behave in a POSIX like |
| 26 | * way. Didn't manage it entirely, but its better. |
| 27 | * Steve Whitehouse: ditto for sendmsg(). |
| 28 | * Steve Whitehouse: A selection of bug fixes to various things. |
| 29 | * Steve Whitehouse: Added TIOCOUTQ ioctl. |
| 30 | * Steve Whitehouse: Fixes to username2sockaddr & sockaddr2username. |
| 31 | * Steve Whitehouse: Fixes to connect() error returns. |
| 32 | * Patrick Caulfield: Fixes to delayed acceptance logic. |
| 33 | * David S. Miller: New socket locking |
| 34 | * Steve Whitehouse: Socket list hashing/locking |
| 35 | * Arnaldo C. Melo: use capable, not suser |
| 36 | * Steve Whitehouse: Removed unused code. Fix to use sk->allocation |
| 37 | * when required. |
| 38 | * Patrick Caulfield: /proc/net/decnet now has object name/number |
| 39 | * Steve Whitehouse: Fixed local port allocation, hashed sk list |
| 40 | * Matthew Wilcox: Fixes for dn_ioctl() |
| 41 | * Steve Whitehouse: New connect/accept logic to allow timeouts and |
| 42 | * prepare for sendpage etc. |
| 43 | */ |
| 44 | |
| 45 | |
| 46 | /****************************************************************************** |
| 47 | (c) 1995-1998 E.M. Serrat emserrat@geocities.com |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 48 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | This program is free software; you can redistribute it and/or modify |
| 50 | it under the terms of the GNU General Public License as published by |
| 51 | the Free Software Foundation; either version 2 of the License, or |
| 52 | any later version. |
| 53 | |
| 54 | This program is distributed in the hope that it will be useful, |
| 55 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 56 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 57 | GNU General Public License for more details. |
| 58 | |
| 59 | HISTORY: |
| 60 | |
| 61 | Version Kernel Date Author/Comments |
| 62 | ------- ------ ---- --------------- |
| 63 | Version 0.0.1 2.0.30 01-dic-97 Eduardo Marcelo Serrat |
| 64 | (emserrat@geocities.com) |
| 65 | |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 66 | First Development of DECnet Socket La- |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | yer for Linux. Only supports outgoing |
| 68 | connections. |
| 69 | |
| 70 | Version 0.0.2 2.1.105 20-jun-98 Patrick J. Caulfield |
| 71 | (patrick@pandh.demon.co.uk) |
| 72 | |
| 73 | Port to new kernel development version. |
| 74 | |
| 75 | Version 0.0.3 2.1.106 25-jun-98 Eduardo Marcelo Serrat |
| 76 | (emserrat@geocities.com) |
| 77 | _ |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 78 | Added support for incoming connections |
| 79 | so we can start developing server apps |
| 80 | on Linux. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | - |
| 82 | Module Support |
| 83 | Version 0.0.4 2.1.109 21-jul-98 Eduardo Marcelo Serrat |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 84 | (emserrat@geocities.com) |
| 85 | _ |
| 86 | Added support for X11R6.4. Now we can |
| 87 | use DECnet transport for X on Linux!!! |
| 88 | - |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | Version 0.0.5 2.1.110 01-aug-98 Eduardo Marcelo Serrat |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 90 | (emserrat@geocities.com) |
| 91 | Removed bugs on flow control |
| 92 | Removed bugs on incoming accessdata |
| 93 | order |
| 94 | - |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | Version 0.0.6 2.1.110 07-aug-98 Eduardo Marcelo Serrat |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 96 | dn_recvmsg fixes |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 98 | Patrick J. Caulfield |
| 99 | dn_bind fixes |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | *******************************************************************************/ |
| 101 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | #include <linux/module.h> |
| 103 | #include <linux/errno.h> |
| 104 | #include <linux/types.h> |
| 105 | #include <linux/slab.h> |
| 106 | #include <linux/socket.h> |
| 107 | #include <linux/in.h> |
| 108 | #include <linux/kernel.h> |
Ingo Molnar | 3f07c01 | 2017-02-08 18:51:30 +0100 | [diff] [blame] | 109 | #include <linux/sched/signal.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | #include <linux/timer.h> |
| 111 | #include <linux/string.h> |
| 112 | #include <linux/sockios.h> |
| 113 | #include <linux/net.h> |
| 114 | #include <linux/netdevice.h> |
| 115 | #include <linux/inet.h> |
| 116 | #include <linux/route.h> |
| 117 | #include <linux/netfilter.h> |
| 118 | #include <linux/seq_file.h> |
| 119 | #include <net/sock.h> |
Arnaldo Carvalho de Melo | c752f07 | 2005-08-09 20:08:28 -0700 | [diff] [blame] | 120 | #include <net/tcp_states.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | #include <net/flow.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | #include <asm/ioctls.h> |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 123 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | #include <linux/mm.h> |
| 125 | #include <linux/interrupt.h> |
| 126 | #include <linux/proc_fs.h> |
| 127 | #include <linux/stat.h> |
| 128 | #include <linux/init.h> |
| 129 | #include <linux/poll.h> |
Himangi Saraogi | c0b8023 | 2014-08-20 23:24:40 +0530 | [diff] [blame] | 130 | #include <linux/jiffies.h> |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 131 | #include <net/net_namespace.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | #include <net/neighbour.h> |
| 133 | #include <net/dst.h> |
Steven Whitehouse | a8731cb | 2006-08-09 15:56:46 -0700 | [diff] [blame] | 134 | #include <net/fib_rules.h> |
Gao Feng | 9c28286 | 2017-03-04 22:10:28 +0800 | [diff] [blame] | 135 | #include <net/tcp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | #include <net/dn.h> |
| 137 | #include <net/dn_nsp.h> |
| 138 | #include <net/dn_dev.h> |
| 139 | #include <net/dn_route.h> |
| 140 | #include <net/dn_fib.h> |
| 141 | #include <net/dn_neigh.h> |
| 142 | |
| 143 | struct dn_sock { |
| 144 | struct sock sk; |
| 145 | struct dn_scp scp; |
| 146 | }; |
| 147 | |
| 148 | static void dn_keepalive(struct sock *sk); |
| 149 | |
| 150 | #define DN_SK_HASH_SHIFT 8 |
| 151 | #define DN_SK_HASH_SIZE (1 << DN_SK_HASH_SHIFT) |
| 152 | #define DN_SK_HASH_MASK (DN_SK_HASH_SIZE - 1) |
| 153 | |
| 154 | |
Eric Dumazet | 90ddc4f | 2005-12-22 12:49:22 -0800 | [diff] [blame] | 155 | static const struct proto_ops dn_proto_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | static DEFINE_RWLOCK(dn_hash_lock); |
| 157 | static struct hlist_head dn_sk_hash[DN_SK_HASH_SIZE]; |
| 158 | static struct hlist_head dn_wild_sk; |
Eric Dumazet | 8d987e5 | 2010-11-09 23:24:26 +0000 | [diff] [blame] | 159 | static atomic_long_t decnet_memory_allocated; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 161 | static int __dn_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen, int flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | static int __dn_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen, int flags); |
| 163 | |
| 164 | static struct hlist_head *dn_find_list(struct sock *sk) |
| 165 | { |
| 166 | struct dn_scp *scp = DN_SK(sk); |
| 167 | |
| 168 | if (scp->addr.sdn_flags & SDF_WILD) |
| 169 | return hlist_empty(&dn_wild_sk) ? &dn_wild_sk : NULL; |
| 170 | |
Harvey Harrison | c4106aa | 2008-11-27 00:12:47 -0800 | [diff] [blame] | 171 | return &dn_sk_hash[le16_to_cpu(scp->addrloc) & DN_SK_HASH_MASK]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | } |
| 173 | |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 174 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | * Valid ports are those greater than zero and not already in use. |
| 176 | */ |
Steven Whitehouse | c4ea94a | 2006-03-20 22:42:39 -0800 | [diff] [blame] | 177 | static int check_port(__le16 port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | { |
| 179 | struct sock *sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | |
| 181 | if (port == 0) |
| 182 | return -1; |
| 183 | |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 184 | sk_for_each(sk, &dn_sk_hash[le16_to_cpu(port) & DN_SK_HASH_MASK]) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | struct dn_scp *scp = DN_SK(sk); |
| 186 | if (scp->addrloc == port) |
| 187 | return -1; |
| 188 | } |
| 189 | return 0; |
| 190 | } |
| 191 | |
| 192 | static unsigned short port_alloc(struct sock *sk) |
| 193 | { |
| 194 | struct dn_scp *scp = DN_SK(sk); |
| 195 | static unsigned short port = 0x2000; |
| 196 | unsigned short i_port = port; |
| 197 | |
Harvey Harrison | c4106aa | 2008-11-27 00:12:47 -0800 | [diff] [blame] | 198 | while(check_port(cpu_to_le16(++port)) != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | if (port == i_port) |
| 200 | return 0; |
| 201 | } |
| 202 | |
Harvey Harrison | c4106aa | 2008-11-27 00:12:47 -0800 | [diff] [blame] | 203 | scp->addrloc = cpu_to_le16(port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | |
| 205 | return 1; |
| 206 | } |
| 207 | |
| 208 | /* |
| 209 | * Since this is only ever called from user |
| 210 | * level, we don't need a write_lock() version |
| 211 | * of this. |
| 212 | */ |
| 213 | static int dn_hash_sock(struct sock *sk) |
| 214 | { |
| 215 | struct dn_scp *scp = DN_SK(sk); |
| 216 | struct hlist_head *list; |
| 217 | int rv = -EUSERS; |
| 218 | |
| 219 | BUG_ON(sk_hashed(sk)); |
| 220 | |
| 221 | write_lock_bh(&dn_hash_lock); |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 222 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | if (!scp->addrloc && !port_alloc(sk)) |
| 224 | goto out; |
| 225 | |
| 226 | rv = -EADDRINUSE; |
| 227 | if ((list = dn_find_list(sk)) == NULL) |
| 228 | goto out; |
| 229 | |
| 230 | sk_add_node(sk, list); |
| 231 | rv = 0; |
| 232 | out: |
| 233 | write_unlock_bh(&dn_hash_lock); |
| 234 | return rv; |
| 235 | } |
| 236 | |
| 237 | static void dn_unhash_sock(struct sock *sk) |
| 238 | { |
| 239 | write_lock(&dn_hash_lock); |
| 240 | sk_del_node_init(sk); |
| 241 | write_unlock(&dn_hash_lock); |
| 242 | } |
| 243 | |
| 244 | static void dn_unhash_sock_bh(struct sock *sk) |
| 245 | { |
| 246 | write_lock_bh(&dn_hash_lock); |
| 247 | sk_del_node_init(sk); |
| 248 | write_unlock_bh(&dn_hash_lock); |
| 249 | } |
| 250 | |
| 251 | static struct hlist_head *listen_hash(struct sockaddr_dn *addr) |
| 252 | { |
| 253 | int i; |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 254 | unsigned int hash = addr->sdn_objnum; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | |
| 256 | if (hash == 0) { |
| 257 | hash = addr->sdn_objnamel; |
Harvey Harrison | c4106aa | 2008-11-27 00:12:47 -0800 | [diff] [blame] | 258 | for(i = 0; i < le16_to_cpu(addr->sdn_objnamel); i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | hash ^= addr->sdn_objname[i]; |
| 260 | hash ^= (hash << 3); |
| 261 | } |
| 262 | } |
| 263 | |
| 264 | return &dn_sk_hash[hash & DN_SK_HASH_MASK]; |
| 265 | } |
| 266 | |
| 267 | /* |
| 268 | * Called to transform a socket from bound (i.e. with a local address) |
| 269 | * into a listening socket (doesn't need a local port number) and rehashes |
| 270 | * based upon the object name/number. |
| 271 | */ |
| 272 | static void dn_rehash_sock(struct sock *sk) |
| 273 | { |
| 274 | struct hlist_head *list; |
| 275 | struct dn_scp *scp = DN_SK(sk); |
| 276 | |
| 277 | if (scp->addr.sdn_flags & SDF_WILD) |
| 278 | return; |
| 279 | |
| 280 | write_lock_bh(&dn_hash_lock); |
| 281 | sk_del_node_init(sk); |
| 282 | DN_SK(sk)->addrloc = 0; |
| 283 | list = listen_hash(&DN_SK(sk)->addr); |
| 284 | sk_add_node(sk, list); |
| 285 | write_unlock_bh(&dn_hash_lock); |
| 286 | } |
| 287 | |
| 288 | int dn_sockaddr2username(struct sockaddr_dn *sdn, unsigned char *buf, unsigned char type) |
| 289 | { |
| 290 | int len = 2; |
| 291 | |
| 292 | *buf++ = type; |
| 293 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 294 | switch (type) { |
| 295 | case 0: |
| 296 | *buf++ = sdn->sdn_objnum; |
| 297 | break; |
| 298 | case 1: |
| 299 | *buf++ = 0; |
| 300 | *buf++ = le16_to_cpu(sdn->sdn_objnamel); |
| 301 | memcpy(buf, sdn->sdn_objname, le16_to_cpu(sdn->sdn_objnamel)); |
| 302 | len = 3 + le16_to_cpu(sdn->sdn_objnamel); |
| 303 | break; |
| 304 | case 2: |
| 305 | memset(buf, 0, 5); |
| 306 | buf += 5; |
| 307 | *buf++ = le16_to_cpu(sdn->sdn_objnamel); |
| 308 | memcpy(buf, sdn->sdn_objname, le16_to_cpu(sdn->sdn_objnamel)); |
| 309 | len = 7 + le16_to_cpu(sdn->sdn_objnamel); |
| 310 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | } |
| 312 | |
| 313 | return len; |
| 314 | } |
| 315 | |
| 316 | /* |
| 317 | * On reception of usernames, we handle types 1 and 0 for destination |
| 318 | * addresses only. Types 2 and 4 are used for source addresses, but the |
| 319 | * UIC, GIC are ignored and they are both treated the same way. Type 3 |
| 320 | * is never used as I've no idea what its purpose might be or what its |
| 321 | * format is. |
| 322 | */ |
| 323 | int dn_username2sockaddr(unsigned char *data, int len, struct sockaddr_dn *sdn, unsigned char *fmt) |
| 324 | { |
| 325 | unsigned char type; |
| 326 | int size = len; |
| 327 | int namel = 12; |
| 328 | |
| 329 | sdn->sdn_objnum = 0; |
Harvey Harrison | c4106aa | 2008-11-27 00:12:47 -0800 | [diff] [blame] | 330 | sdn->sdn_objnamel = cpu_to_le16(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | memset(sdn->sdn_objname, 0, DN_MAXOBJL); |
| 332 | |
| 333 | if (len < 2) |
| 334 | return -1; |
| 335 | |
| 336 | len -= 2; |
| 337 | *fmt = *data++; |
| 338 | type = *data++; |
| 339 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 340 | switch (*fmt) { |
| 341 | case 0: |
| 342 | sdn->sdn_objnum = type; |
| 343 | return 2; |
| 344 | case 1: |
| 345 | namel = 16; |
| 346 | break; |
| 347 | case 2: |
| 348 | len -= 4; |
| 349 | data += 4; |
| 350 | break; |
| 351 | case 4: |
| 352 | len -= 8; |
| 353 | data += 8; |
| 354 | break; |
| 355 | default: |
| 356 | return -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | } |
| 358 | |
| 359 | len -= 1; |
| 360 | |
| 361 | if (len < 0) |
| 362 | return -1; |
| 363 | |
Harvey Harrison | c4106aa | 2008-11-27 00:12:47 -0800 | [diff] [blame] | 364 | sdn->sdn_objnamel = cpu_to_le16(*data++); |
| 365 | len -= le16_to_cpu(sdn->sdn_objnamel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | |
Harvey Harrison | c4106aa | 2008-11-27 00:12:47 -0800 | [diff] [blame] | 367 | if ((len < 0) || (le16_to_cpu(sdn->sdn_objnamel) > namel)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | return -1; |
| 369 | |
Harvey Harrison | c4106aa | 2008-11-27 00:12:47 -0800 | [diff] [blame] | 370 | memcpy(sdn->sdn_objname, data, le16_to_cpu(sdn->sdn_objnamel)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | |
| 372 | return size - len; |
| 373 | } |
| 374 | |
| 375 | struct sock *dn_sklist_find_listener(struct sockaddr_dn *addr) |
| 376 | { |
| 377 | struct hlist_head *list = listen_hash(addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | struct sock *sk; |
| 379 | |
| 380 | read_lock(&dn_hash_lock); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 381 | sk_for_each(sk, list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | struct dn_scp *scp = DN_SK(sk); |
| 383 | if (sk->sk_state != TCP_LISTEN) |
| 384 | continue; |
| 385 | if (scp->addr.sdn_objnum) { |
| 386 | if (scp->addr.sdn_objnum != addr->sdn_objnum) |
| 387 | continue; |
| 388 | } else { |
| 389 | if (addr->sdn_objnum) |
| 390 | continue; |
| 391 | if (scp->addr.sdn_objnamel != addr->sdn_objnamel) |
| 392 | continue; |
Harvey Harrison | c4106aa | 2008-11-27 00:12:47 -0800 | [diff] [blame] | 393 | if (memcmp(scp->addr.sdn_objname, addr->sdn_objname, le16_to_cpu(addr->sdn_objnamel)) != 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | continue; |
| 395 | } |
| 396 | sock_hold(sk); |
| 397 | read_unlock(&dn_hash_lock); |
| 398 | return sk; |
| 399 | } |
| 400 | |
| 401 | sk = sk_head(&dn_wild_sk); |
| 402 | if (sk) { |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 403 | if (sk->sk_state == TCP_LISTEN) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | sock_hold(sk); |
| 405 | else |
| 406 | sk = NULL; |
| 407 | } |
| 408 | |
| 409 | read_unlock(&dn_hash_lock); |
| 410 | return sk; |
| 411 | } |
| 412 | |
| 413 | struct sock *dn_find_by_skb(struct sk_buff *skb) |
| 414 | { |
| 415 | struct dn_skb_cb *cb = DN_SKB_CB(skb); |
| 416 | struct sock *sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | struct dn_scp *scp; |
| 418 | |
| 419 | read_lock(&dn_hash_lock); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 420 | sk_for_each(sk, &dn_sk_hash[le16_to_cpu(cb->dst_port) & DN_SK_HASH_MASK]) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | scp = DN_SK(sk); |
| 422 | if (cb->src != dn_saddr2dn(&scp->peer)) |
| 423 | continue; |
| 424 | if (cb->dst_port != scp->addrloc) |
| 425 | continue; |
| 426 | if (scp->addrrem && (cb->src_port != scp->addrrem)) |
| 427 | continue; |
| 428 | sock_hold(sk); |
| 429 | goto found; |
| 430 | } |
| 431 | sk = NULL; |
| 432 | found: |
| 433 | read_unlock(&dn_hash_lock); |
| 434 | return sk; |
| 435 | } |
| 436 | |
| 437 | |
| 438 | |
| 439 | static void dn_destruct(struct sock *sk) |
| 440 | { |
| 441 | struct dn_scp *scp = DN_SK(sk); |
| 442 | |
| 443 | skb_queue_purge(&scp->data_xmit_queue); |
| 444 | skb_queue_purge(&scp->other_xmit_queue); |
| 445 | skb_queue_purge(&scp->other_receive_queue); |
| 446 | |
Eric Dumazet | b6c6712 | 2010-04-08 23:03:29 +0000 | [diff] [blame] | 447 | dst_release(rcu_dereference_check(sk->sk_dst_cache, 1)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | } |
| 449 | |
Eric Dumazet | 0604475 | 2017-06-07 13:29:12 -0700 | [diff] [blame] | 450 | static unsigned long dn_memory_pressure; |
Steven Whitehouse | 1f12bcc | 2005-12-05 13:42:06 -0800 | [diff] [blame] | 451 | |
Pavel Emelyanov | 5c52ba1 | 2008-07-16 20:28:10 -0700 | [diff] [blame] | 452 | static void dn_enter_memory_pressure(struct sock *sk) |
Steven Whitehouse | 1f12bcc | 2005-12-05 13:42:06 -0800 | [diff] [blame] | 453 | { |
| 454 | if (!dn_memory_pressure) { |
| 455 | dn_memory_pressure = 1; |
| 456 | } |
| 457 | } |
| 458 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | static struct proto dn_proto = { |
Steven Whitehouse | 1f12bcc | 2005-12-05 13:42:06 -0800 | [diff] [blame] | 460 | .name = "NSP", |
| 461 | .owner = THIS_MODULE, |
| 462 | .enter_memory_pressure = dn_enter_memory_pressure, |
| 463 | .memory_pressure = &dn_memory_pressure, |
| 464 | .memory_allocated = &decnet_memory_allocated, |
| 465 | .sysctl_mem = sysctl_decnet_mem, |
| 466 | .sysctl_wmem = sysctl_decnet_wmem, |
| 467 | .sysctl_rmem = sysctl_decnet_rmem, |
| 468 | .max_header = DN_MAX_NSP_DATA_HEADER + 64, |
| 469 | .obj_size = sizeof(struct dn_sock), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | }; |
| 471 | |
Eric W. Biederman | 11aa9c2 | 2015-05-08 21:09:13 -0500 | [diff] [blame] | 472 | static struct sock *dn_alloc_sock(struct net *net, struct socket *sock, gfp_t gfp, int kern) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | { |
| 474 | struct dn_scp *scp; |
Eric W. Biederman | 11aa9c2 | 2015-05-08 21:09:13 -0500 | [diff] [blame] | 475 | struct sock *sk = sk_alloc(net, PF_DECnet, gfp, &dn_proto, kern); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | |
| 477 | if (!sk) |
| 478 | goto out; |
| 479 | |
| 480 | if (sock) |
| 481 | sock->ops = &dn_proto_ops; |
| 482 | sock_init_data(sock, sk); |
| 483 | |
| 484 | sk->sk_backlog_rcv = dn_nsp_backlog_rcv; |
| 485 | sk->sk_destruct = dn_destruct; |
Tom Herbert | 28448b8 | 2014-05-23 08:47:19 -0700 | [diff] [blame] | 486 | sk->sk_no_check_tx = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | sk->sk_family = PF_DECnet; |
| 488 | sk->sk_protocol = 0; |
| 489 | sk->sk_allocation = gfp; |
Steven Whitehouse | 1f12bcc | 2005-12-05 13:42:06 -0800 | [diff] [blame] | 490 | sk->sk_sndbuf = sysctl_decnet_wmem[1]; |
| 491 | sk->sk_rcvbuf = sysctl_decnet_rmem[1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | |
| 493 | /* Initialization of DECnet Session Control Port */ |
| 494 | scp = DN_SK(sk); |
| 495 | scp->state = DN_O; /* Open */ |
| 496 | scp->numdat = 1; /* Next data seg to tx */ |
| 497 | scp->numoth = 1; /* Next oth data to tx */ |
| 498 | scp->ackxmt_dat = 0; /* Last data seg ack'ed */ |
| 499 | scp->ackxmt_oth = 0; /* Last oth data ack'ed */ |
| 500 | scp->ackrcv_dat = 0; /* Highest data ack recv*/ |
| 501 | scp->ackrcv_oth = 0; /* Last oth data ack rec*/ |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 502 | scp->flowrem_sw = DN_SEND; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | scp->flowloc_sw = DN_SEND; |
| 504 | scp->flowrem_dat = 0; |
| 505 | scp->flowrem_oth = 1; |
| 506 | scp->flowloc_dat = 0; |
| 507 | scp->flowloc_oth = 1; |
| 508 | scp->services_rem = 0; |
| 509 | scp->services_loc = 1 | NSP_FC_NONE; |
| 510 | scp->info_rem = 0; |
| 511 | scp->info_loc = 0x03; /* NSP version 4.1 */ |
| 512 | scp->segsize_rem = 230 - DN_MAX_NSP_DATA_HEADER; /* Default: Updated by remote segsize */ |
| 513 | scp->nonagle = 0; |
| 514 | scp->multi_ireq = 1; |
| 515 | scp->accept_mode = ACC_IMMED; |
| 516 | scp->addr.sdn_family = AF_DECnet; |
| 517 | scp->peer.sdn_family = AF_DECnet; |
| 518 | scp->accessdata.acc_accl = 5; |
| 519 | memcpy(scp->accessdata.acc_acc, "LINUX", 5); |
| 520 | |
| 521 | scp->max_window = NSP_MAX_WINDOW; |
| 522 | scp->snd_window = NSP_MIN_WINDOW; |
| 523 | scp->nsp_srtt = NSP_INITIAL_SRTT; |
| 524 | scp->nsp_rttvar = NSP_INITIAL_RTTVAR; |
| 525 | scp->nsp_rxtshift = 0; |
| 526 | |
| 527 | skb_queue_head_init(&scp->data_xmit_queue); |
| 528 | skb_queue_head_init(&scp->other_xmit_queue); |
| 529 | skb_queue_head_init(&scp->other_receive_queue); |
| 530 | |
| 531 | scp->persist = 0; |
| 532 | scp->persist_fxn = NULL; |
| 533 | scp->keepalive = 10 * HZ; |
| 534 | scp->keepalive_fxn = dn_keepalive; |
| 535 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | dn_start_slow_timer(sk); |
| 537 | out: |
| 538 | return sk; |
| 539 | } |
| 540 | |
| 541 | /* |
| 542 | * Keepalive timer. |
| 543 | * FIXME: Should respond to SO_KEEPALIVE etc. |
| 544 | */ |
| 545 | static void dn_keepalive(struct sock *sk) |
| 546 | { |
| 547 | struct dn_scp *scp = DN_SK(sk); |
| 548 | |
| 549 | /* |
| 550 | * By checking the other_data transmit queue is empty |
| 551 | * we are double checking that we are not sending too |
| 552 | * many of these keepalive frames. |
| 553 | */ |
David S. Miller | b03efcf | 2005-07-08 14:57:23 -0700 | [diff] [blame] | 554 | if (skb_queue_empty(&scp->other_xmit_queue)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | dn_nsp_send_link(sk, DN_NOCHANGE, 0); |
| 556 | } |
| 557 | |
| 558 | |
| 559 | /* |
| 560 | * Timer for shutdown/destroyed sockets. |
| 561 | * When socket is dead & no packets have been sent for a |
| 562 | * certain amount of time, they are removed by this |
| 563 | * routine. Also takes care of sending out DI & DC |
| 564 | * frames at correct times. |
| 565 | */ |
| 566 | int dn_destroy_timer(struct sock *sk) |
| 567 | { |
| 568 | struct dn_scp *scp = DN_SK(sk); |
| 569 | |
| 570 | scp->persist = dn_nsp_persist(sk); |
| 571 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 572 | switch (scp->state) { |
| 573 | case DN_DI: |
| 574 | dn_nsp_send_disc(sk, NSP_DISCINIT, 0, GFP_ATOMIC); |
| 575 | if (scp->nsp_rxtshift >= decnet_di_count) |
| 576 | scp->state = DN_CN; |
| 577 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 579 | case DN_DR: |
| 580 | dn_nsp_send_disc(sk, NSP_DISCINIT, 0, GFP_ATOMIC); |
| 581 | if (scp->nsp_rxtshift >= decnet_dr_count) |
| 582 | scp->state = DN_DRC; |
| 583 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 585 | case DN_DN: |
| 586 | if (scp->nsp_rxtshift < decnet_dn_count) { |
| 587 | /* printk(KERN_DEBUG "dn_destroy_timer: DN\n"); */ |
| 588 | dn_nsp_send_disc(sk, NSP_DISCCONF, NSP_REASON_DC, |
| 589 | GFP_ATOMIC); |
| 590 | return 0; |
| 591 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | } |
| 593 | |
| 594 | scp->persist = (HZ * decnet_time_wait); |
| 595 | |
| 596 | if (sk->sk_socket) |
| 597 | return 0; |
| 598 | |
Himangi Saraogi | c0b8023 | 2014-08-20 23:24:40 +0530 | [diff] [blame] | 599 | if (time_after_eq(jiffies, scp->stamp + HZ * decnet_time_wait)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | dn_unhash_sock(sk); |
| 601 | sock_put(sk); |
| 602 | return 1; |
| 603 | } |
| 604 | |
| 605 | return 0; |
| 606 | } |
| 607 | |
| 608 | static void dn_destroy_sock(struct sock *sk) |
| 609 | { |
| 610 | struct dn_scp *scp = DN_SK(sk); |
| 611 | |
| 612 | scp->nsp_rxtshift = 0; /* reset back off */ |
| 613 | |
| 614 | if (sk->sk_socket) { |
| 615 | if (sk->sk_socket->state != SS_UNCONNECTED) |
| 616 | sk->sk_socket->state = SS_DISCONNECTING; |
| 617 | } |
| 618 | |
| 619 | sk->sk_state = TCP_CLOSE; |
| 620 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 621 | switch (scp->state) { |
| 622 | case DN_DN: |
| 623 | dn_nsp_send_disc(sk, NSP_DISCCONF, NSP_REASON_DC, |
| 624 | sk->sk_allocation); |
| 625 | scp->persist_fxn = dn_destroy_timer; |
| 626 | scp->persist = dn_nsp_persist(sk); |
| 627 | break; |
| 628 | case DN_CR: |
| 629 | scp->state = DN_DR; |
| 630 | goto disc_reject; |
| 631 | case DN_RUN: |
| 632 | scp->state = DN_DI; |
Gustavo A. R. Silva | 86e58cc | 2017-10-16 15:11:22 -0500 | [diff] [blame] | 633 | /* fall through */ |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 634 | case DN_DI: |
| 635 | case DN_DR: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | disc_reject: |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 637 | dn_nsp_send_disc(sk, NSP_DISCINIT, 0, sk->sk_allocation); |
Gustavo A. R. Silva | 86e58cc | 2017-10-16 15:11:22 -0500 | [diff] [blame] | 638 | /* fall through */ |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 639 | case DN_NC: |
| 640 | case DN_NR: |
| 641 | case DN_RJ: |
| 642 | case DN_DIC: |
| 643 | case DN_CN: |
| 644 | case DN_DRC: |
| 645 | case DN_CI: |
| 646 | case DN_CD: |
| 647 | scp->persist_fxn = dn_destroy_timer; |
| 648 | scp->persist = dn_nsp_persist(sk); |
| 649 | break; |
| 650 | default: |
| 651 | printk(KERN_DEBUG "DECnet: dn_destroy_sock passed socket in invalid state\n"); |
Gustavo A. R. Silva | 86e58cc | 2017-10-16 15:11:22 -0500 | [diff] [blame] | 652 | /* fall through */ |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 653 | case DN_O: |
| 654 | dn_stop_slow_timer(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 656 | dn_unhash_sock_bh(sk); |
| 657 | sock_put(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 659 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | } |
| 661 | } |
| 662 | |
Steven Whitehouse | c4ea94a | 2006-03-20 22:42:39 -0800 | [diff] [blame] | 663 | char *dn_addr2asc(__u16 addr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | { |
| 665 | unsigned short node, area; |
| 666 | |
| 667 | node = addr & 0x03ff; |
| 668 | area = addr >> 10; |
| 669 | sprintf(buf, "%hd.%hd", area, node); |
| 670 | |
| 671 | return buf; |
| 672 | } |
| 673 | |
| 674 | |
| 675 | |
Eric Paris | 3f378b6 | 2009-11-05 22:18:14 -0800 | [diff] [blame] | 676 | static int dn_create(struct net *net, struct socket *sock, int protocol, |
| 677 | int kern) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | { |
| 679 | struct sock *sk; |
| 680 | |
Hannes Frederic Sowa | 79462ad0 | 2015-12-14 22:03:39 +0100 | [diff] [blame] | 681 | if (protocol < 0 || protocol > SK_PROTOCOL_MAX) |
| 682 | return -EINVAL; |
| 683 | |
Octavian Purdila | 09ad9bc | 2009-11-25 15:14:13 -0800 | [diff] [blame] | 684 | if (!net_eq(net, &init_net)) |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 685 | return -EAFNOSUPPORT; |
| 686 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 687 | switch (sock->type) { |
| 688 | case SOCK_SEQPACKET: |
| 689 | if (protocol != DNPROTO_NSP) |
| 690 | return -EPROTONOSUPPORT; |
| 691 | break; |
| 692 | case SOCK_STREAM: |
| 693 | break; |
| 694 | default: |
| 695 | return -ESOCKTNOSUPPORT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | } |
| 697 | |
| 698 | |
Eric W. Biederman | 11aa9c2 | 2015-05-08 21:09:13 -0500 | [diff] [blame] | 699 | if ((sk = dn_alloc_sock(net, sock, GFP_KERNEL, kern)) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 700 | return -ENOBUFS; |
| 701 | |
| 702 | sk->sk_protocol = protocol; |
| 703 | |
| 704 | return 0; |
| 705 | } |
| 706 | |
| 707 | |
| 708 | static int |
| 709 | dn_release(struct socket *sock) |
| 710 | { |
| 711 | struct sock *sk = sock->sk; |
| 712 | |
| 713 | if (sk) { |
| 714 | sock_orphan(sk); |
| 715 | sock_hold(sk); |
| 716 | lock_sock(sk); |
| 717 | dn_destroy_sock(sk); |
| 718 | release_sock(sk); |
| 719 | sock_put(sk); |
| 720 | } |
| 721 | |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 722 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | } |
| 724 | |
| 725 | static int dn_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) |
| 726 | { |
| 727 | struct sock *sk = sock->sk; |
| 728 | struct dn_scp *scp = DN_SK(sk); |
| 729 | struct sockaddr_dn *saddr = (struct sockaddr_dn *)uaddr; |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 730 | struct net_device *dev, *ldev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | int rv; |
| 732 | |
| 733 | if (addr_len != sizeof(struct sockaddr_dn)) |
| 734 | return -EINVAL; |
| 735 | |
| 736 | if (saddr->sdn_family != AF_DECnet) |
| 737 | return -EINVAL; |
| 738 | |
Harvey Harrison | c4106aa | 2008-11-27 00:12:47 -0800 | [diff] [blame] | 739 | if (le16_to_cpu(saddr->sdn_nodeaddrl) && (le16_to_cpu(saddr->sdn_nodeaddrl) != 2)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | return -EINVAL; |
| 741 | |
Harvey Harrison | c4106aa | 2008-11-27 00:12:47 -0800 | [diff] [blame] | 742 | if (le16_to_cpu(saddr->sdn_objnamel) > DN_MAXOBJL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | return -EINVAL; |
| 744 | |
| 745 | if (saddr->sdn_flags & ~SDF_WILD) |
| 746 | return -EINVAL; |
| 747 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | if (!capable(CAP_NET_BIND_SERVICE) && (saddr->sdn_objnum || |
| 749 | (saddr->sdn_flags & SDF_WILD))) |
| 750 | return -EACCES; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | |
| 752 | if (!(saddr->sdn_flags & SDF_WILD)) { |
Harvey Harrison | c4106aa | 2008-11-27 00:12:47 -0800 | [diff] [blame] | 753 | if (le16_to_cpu(saddr->sdn_nodeaddrl)) { |
Eric Dumazet | c6d14c8 | 2009-11-04 05:43:23 -0800 | [diff] [blame] | 754 | rcu_read_lock(); |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 755 | ldev = NULL; |
Eric Dumazet | c6d14c8 | 2009-11-04 05:43:23 -0800 | [diff] [blame] | 756 | for_each_netdev_rcu(&init_net, dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | if (!dev->dn_ptr) |
| 758 | continue; |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 759 | if (dn_dev_islocal(dev, dn_saddr2dn(saddr))) { |
| 760 | ldev = dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | break; |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 762 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | } |
Eric Dumazet | c6d14c8 | 2009-11-04 05:43:23 -0800 | [diff] [blame] | 764 | rcu_read_unlock(); |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 765 | if (ldev == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | return -EADDRNOTAVAIL; |
| 767 | } |
| 768 | } |
| 769 | |
| 770 | rv = -EINVAL; |
| 771 | lock_sock(sk); |
| 772 | if (sock_flag(sk, SOCK_ZAPPED)) { |
| 773 | memcpy(&scp->addr, saddr, addr_len); |
| 774 | sock_reset_flag(sk, SOCK_ZAPPED); |
| 775 | |
| 776 | rv = dn_hash_sock(sk); |
| 777 | if (rv) |
| 778 | sock_set_flag(sk, SOCK_ZAPPED); |
| 779 | } |
| 780 | release_sock(sk); |
| 781 | |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 782 | return rv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | } |
| 784 | |
| 785 | |
| 786 | static int dn_auto_bind(struct socket *sock) |
| 787 | { |
| 788 | struct sock *sk = sock->sk; |
| 789 | struct dn_scp *scp = DN_SK(sk); |
| 790 | int rv; |
| 791 | |
| 792 | sock_reset_flag(sk, SOCK_ZAPPED); |
| 793 | |
| 794 | scp->addr.sdn_flags = 0; |
| 795 | scp->addr.sdn_objnum = 0; |
| 796 | |
| 797 | /* |
| 798 | * This stuff is to keep compatibility with Eduardo's |
| 799 | * patch. I hope I can dispense with it shortly... |
| 800 | */ |
| 801 | if ((scp->accessdata.acc_accl != 0) && |
| 802 | (scp->accessdata.acc_accl <= 12)) { |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 803 | |
Harvey Harrison | c4106aa | 2008-11-27 00:12:47 -0800 | [diff] [blame] | 804 | scp->addr.sdn_objnamel = cpu_to_le16(scp->accessdata.acc_accl); |
| 805 | memcpy(scp->addr.sdn_objname, scp->accessdata.acc_acc, le16_to_cpu(scp->addr.sdn_objnamel)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | |
| 807 | scp->accessdata.acc_accl = 0; |
| 808 | memset(scp->accessdata.acc_acc, 0, 40); |
| 809 | } |
| 810 | /* End of compatibility stuff */ |
| 811 | |
Harvey Harrison | c4106aa | 2008-11-27 00:12:47 -0800 | [diff] [blame] | 812 | scp->addr.sdn_add.a_len = cpu_to_le16(2); |
Steven Whitehouse | c4ea94a | 2006-03-20 22:42:39 -0800 | [diff] [blame] | 813 | rv = dn_dev_bind_default((__le16 *)scp->addr.sdn_add.a_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | if (rv == 0) { |
| 815 | rv = dn_hash_sock(sk); |
| 816 | if (rv) |
| 817 | sock_set_flag(sk, SOCK_ZAPPED); |
| 818 | } |
| 819 | |
| 820 | return rv; |
| 821 | } |
| 822 | |
Al Viro | dd0fc66 | 2005-10-07 07:46:04 +0100 | [diff] [blame] | 823 | static int dn_confirm_accept(struct sock *sk, long *timeo, gfp_t allocation) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | { |
| 825 | struct dn_scp *scp = DN_SK(sk); |
| 826 | DEFINE_WAIT(wait); |
| 827 | int err; |
| 828 | |
| 829 | if (scp->state != DN_CR) |
| 830 | return -EINVAL; |
| 831 | |
| 832 | scp->state = DN_CC; |
David S. Miller | 0dbaee3 | 2010-12-13 12:52:14 -0800 | [diff] [blame] | 833 | scp->segsize_loc = dst_metric_advmss(__sk_dst_get(sk)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | dn_send_conn_conf(sk, allocation); |
| 835 | |
Eric Dumazet | aa39514 | 2010-04-20 13:03:51 +0000 | [diff] [blame] | 836 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | for(;;) { |
| 838 | release_sock(sk); |
| 839 | if (scp->state == DN_CC) |
| 840 | *timeo = schedule_timeout(*timeo); |
| 841 | lock_sock(sk); |
| 842 | err = 0; |
| 843 | if (scp->state == DN_RUN) |
| 844 | break; |
| 845 | err = sock_error(sk); |
| 846 | if (err) |
| 847 | break; |
| 848 | err = sock_intr_errno(*timeo); |
| 849 | if (signal_pending(current)) |
| 850 | break; |
| 851 | err = -EAGAIN; |
| 852 | if (!*timeo) |
| 853 | break; |
Eric Dumazet | aa39514 | 2010-04-20 13:03:51 +0000 | [diff] [blame] | 854 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | } |
Eric Dumazet | aa39514 | 2010-04-20 13:03:51 +0000 | [diff] [blame] | 856 | finish_wait(sk_sleep(sk), &wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 857 | if (err == 0) { |
| 858 | sk->sk_socket->state = SS_CONNECTED; |
| 859 | } else if (scp->state != DN_CC) { |
| 860 | sk->sk_socket->state = SS_UNCONNECTED; |
| 861 | } |
| 862 | return err; |
| 863 | } |
| 864 | |
| 865 | static int dn_wait_run(struct sock *sk, long *timeo) |
| 866 | { |
| 867 | struct dn_scp *scp = DN_SK(sk); |
| 868 | DEFINE_WAIT(wait); |
| 869 | int err = 0; |
| 870 | |
| 871 | if (scp->state == DN_RUN) |
| 872 | goto out; |
| 873 | |
| 874 | if (!*timeo) |
| 875 | return -EALREADY; |
| 876 | |
Eric Dumazet | aa39514 | 2010-04-20 13:03:51 +0000 | [diff] [blame] | 877 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | for(;;) { |
| 879 | release_sock(sk); |
| 880 | if (scp->state == DN_CI || scp->state == DN_CC) |
| 881 | *timeo = schedule_timeout(*timeo); |
| 882 | lock_sock(sk); |
| 883 | err = 0; |
| 884 | if (scp->state == DN_RUN) |
| 885 | break; |
| 886 | err = sock_error(sk); |
| 887 | if (err) |
| 888 | break; |
| 889 | err = sock_intr_errno(*timeo); |
| 890 | if (signal_pending(current)) |
| 891 | break; |
| 892 | err = -ETIMEDOUT; |
| 893 | if (!*timeo) |
| 894 | break; |
Eric Dumazet | aa39514 | 2010-04-20 13:03:51 +0000 | [diff] [blame] | 895 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 896 | } |
Eric Dumazet | aa39514 | 2010-04-20 13:03:51 +0000 | [diff] [blame] | 897 | finish_wait(sk_sleep(sk), &wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 898 | out: |
| 899 | if (err == 0) { |
| 900 | sk->sk_socket->state = SS_CONNECTED; |
| 901 | } else if (scp->state != DN_CI && scp->state != DN_CC) { |
| 902 | sk->sk_socket->state = SS_UNCONNECTED; |
| 903 | } |
| 904 | return err; |
| 905 | } |
| 906 | |
| 907 | static int __dn_connect(struct sock *sk, struct sockaddr_dn *addr, int addrlen, long *timeo, int flags) |
| 908 | { |
| 909 | struct socket *sock = sk->sk_socket; |
| 910 | struct dn_scp *scp = DN_SK(sk); |
| 911 | int err = -EISCONN; |
David S. Miller | bef55ae | 2011-03-12 17:17:10 -0500 | [diff] [blame] | 912 | struct flowidn fld; |
Cong Wang | cec771d | 2013-01-22 21:09:50 +0000 | [diff] [blame] | 913 | struct dst_entry *dst; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | |
| 915 | if (sock->state == SS_CONNECTED) |
| 916 | goto out; |
| 917 | |
| 918 | if (sock->state == SS_CONNECTING) { |
| 919 | err = 0; |
| 920 | if (scp->state == DN_RUN) { |
| 921 | sock->state = SS_CONNECTED; |
| 922 | goto out; |
| 923 | } |
| 924 | err = -ECONNREFUSED; |
| 925 | if (scp->state != DN_CI && scp->state != DN_CC) { |
| 926 | sock->state = SS_UNCONNECTED; |
| 927 | goto out; |
| 928 | } |
| 929 | return dn_wait_run(sk, timeo); |
| 930 | } |
| 931 | |
| 932 | err = -EINVAL; |
| 933 | if (scp->state != DN_O) |
| 934 | goto out; |
| 935 | |
| 936 | if (addr == NULL || addrlen != sizeof(struct sockaddr_dn)) |
| 937 | goto out; |
| 938 | if (addr->sdn_family != AF_DECnet) |
| 939 | goto out; |
| 940 | if (addr->sdn_flags & SDF_WILD) |
| 941 | goto out; |
| 942 | |
| 943 | if (sock_flag(sk, SOCK_ZAPPED)) { |
| 944 | err = dn_auto_bind(sk->sk_socket); |
| 945 | if (err) |
| 946 | goto out; |
| 947 | } |
| 948 | |
| 949 | memcpy(&scp->peer, addr, sizeof(struct sockaddr_dn)); |
| 950 | |
| 951 | err = -EHOSTUNREACH; |
David S. Miller | bef55ae | 2011-03-12 17:17:10 -0500 | [diff] [blame] | 952 | memset(&fld, 0, sizeof(fld)); |
| 953 | fld.flowidn_oif = sk->sk_bound_dev_if; |
| 954 | fld.daddr = dn_saddr2dn(&scp->peer); |
| 955 | fld.saddr = dn_saddr2dn(&scp->addr); |
| 956 | dn_sk_ports_copy(&fld, scp); |
| 957 | fld.flowidn_proto = DNPROTO_NSP; |
| 958 | if (dn_route_output_sock(&sk->sk_dst_cache, &fld, sk, flags) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 959 | goto out; |
Cong Wang | cec771d | 2013-01-22 21:09:50 +0000 | [diff] [blame] | 960 | dst = __sk_dst_get(sk); |
| 961 | sk->sk_route_caps = dst->dev->features; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 962 | sock->state = SS_CONNECTING; |
| 963 | scp->state = DN_CI; |
Cong Wang | cec771d | 2013-01-22 21:09:50 +0000 | [diff] [blame] | 964 | scp->segsize_loc = dst_metric_advmss(dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 965 | |
| 966 | dn_nsp_send_conninit(sk, NSP_CI); |
| 967 | err = -EINPROGRESS; |
| 968 | if (*timeo) { |
| 969 | err = dn_wait_run(sk, timeo); |
| 970 | } |
| 971 | out: |
| 972 | return err; |
| 973 | } |
| 974 | |
| 975 | static int dn_connect(struct socket *sock, struct sockaddr *uaddr, int addrlen, int flags) |
| 976 | { |
| 977 | struct sockaddr_dn *addr = (struct sockaddr_dn *)uaddr; |
| 978 | struct sock *sk = sock->sk; |
| 979 | int err; |
| 980 | long timeo = sock_sndtimeo(sk, flags & O_NONBLOCK); |
| 981 | |
| 982 | lock_sock(sk); |
| 983 | err = __dn_connect(sk, addr, addrlen, &timeo, 0); |
| 984 | release_sock(sk); |
| 985 | |
| 986 | return err; |
| 987 | } |
| 988 | |
| 989 | static inline int dn_check_state(struct sock *sk, struct sockaddr_dn *addr, int addrlen, long *timeo, int flags) |
| 990 | { |
| 991 | struct dn_scp *scp = DN_SK(sk); |
| 992 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 993 | switch (scp->state) { |
| 994 | case DN_RUN: |
| 995 | return 0; |
| 996 | case DN_CR: |
| 997 | return dn_confirm_accept(sk, timeo, sk->sk_allocation); |
| 998 | case DN_CI: |
| 999 | case DN_CC: |
| 1000 | return dn_wait_run(sk, timeo); |
| 1001 | case DN_O: |
| 1002 | return __dn_connect(sk, addr, addrlen, timeo, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1003 | } |
| 1004 | |
| 1005 | return -EINVAL; |
| 1006 | } |
| 1007 | |
| 1008 | |
| 1009 | static void dn_access_copy(struct sk_buff *skb, struct accessdata_dn *acc) |
| 1010 | { |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 1011 | unsigned char *ptr = skb->data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1012 | |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 1013 | acc->acc_userl = *ptr++; |
| 1014 | memcpy(&acc->acc_user, ptr, acc->acc_userl); |
| 1015 | ptr += acc->acc_userl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1016 | |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 1017 | acc->acc_passl = *ptr++; |
| 1018 | memcpy(&acc->acc_pass, ptr, acc->acc_passl); |
| 1019 | ptr += acc->acc_passl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 1021 | acc->acc_accl = *ptr++; |
| 1022 | memcpy(&acc->acc_acc, ptr, acc->acc_accl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1023 | |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 1024 | skb_pull(skb, acc->acc_accl + acc->acc_passl + acc->acc_userl + 3); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1025 | |
| 1026 | } |
| 1027 | |
| 1028 | static void dn_user_copy(struct sk_buff *skb, struct optdata_dn *opt) |
| 1029 | { |
Steven Whitehouse | 375d9d7 | 2006-11-07 15:09:17 -0800 | [diff] [blame] | 1030 | unsigned char *ptr = skb->data; |
| 1031 | u16 len = *ptr++; /* yes, it's 8bit on the wire */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | |
Steven Whitehouse | 375d9d7 | 2006-11-07 15:09:17 -0800 | [diff] [blame] | 1033 | BUG_ON(len > 16); /* we've checked the contents earlier */ |
Harvey Harrison | c4106aa | 2008-11-27 00:12:47 -0800 | [diff] [blame] | 1034 | opt->opt_optl = cpu_to_le16(len); |
Steven Whitehouse | 375d9d7 | 2006-11-07 15:09:17 -0800 | [diff] [blame] | 1035 | opt->opt_status = 0; |
| 1036 | memcpy(opt->opt_data, ptr, len); |
| 1037 | skb_pull(skb, len + 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1038 | } |
| 1039 | |
| 1040 | static struct sk_buff *dn_wait_for_connect(struct sock *sk, long *timeo) |
| 1041 | { |
| 1042 | DEFINE_WAIT(wait); |
| 1043 | struct sk_buff *skb = NULL; |
| 1044 | int err = 0; |
| 1045 | |
Eric Dumazet | aa39514 | 2010-04-20 13:03:51 +0000 | [diff] [blame] | 1046 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | for(;;) { |
| 1048 | release_sock(sk); |
| 1049 | skb = skb_dequeue(&sk->sk_receive_queue); |
| 1050 | if (skb == NULL) { |
| 1051 | *timeo = schedule_timeout(*timeo); |
| 1052 | skb = skb_dequeue(&sk->sk_receive_queue); |
| 1053 | } |
| 1054 | lock_sock(sk); |
| 1055 | if (skb != NULL) |
| 1056 | break; |
| 1057 | err = -EINVAL; |
| 1058 | if (sk->sk_state != TCP_LISTEN) |
| 1059 | break; |
| 1060 | err = sock_intr_errno(*timeo); |
| 1061 | if (signal_pending(current)) |
| 1062 | break; |
| 1063 | err = -EAGAIN; |
| 1064 | if (!*timeo) |
| 1065 | break; |
Eric Dumazet | aa39514 | 2010-04-20 13:03:51 +0000 | [diff] [blame] | 1066 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | } |
Eric Dumazet | aa39514 | 2010-04-20 13:03:51 +0000 | [diff] [blame] | 1068 | finish_wait(sk_sleep(sk), &wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1069 | |
| 1070 | return skb == NULL ? ERR_PTR(err) : skb; |
| 1071 | } |
| 1072 | |
David Howells | cdfbabf | 2017-03-09 08:09:05 +0000 | [diff] [blame] | 1073 | static int dn_accept(struct socket *sock, struct socket *newsock, int flags, |
| 1074 | bool kern) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1075 | { |
| 1076 | struct sock *sk = sock->sk, *newsk; |
| 1077 | struct sk_buff *skb = NULL; |
| 1078 | struct dn_skb_cb *cb; |
| 1079 | unsigned char menuver; |
| 1080 | int err = 0; |
| 1081 | unsigned char type; |
| 1082 | long timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 1083 | struct dst_entry *dst; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1084 | |
| 1085 | lock_sock(sk); |
| 1086 | |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 1087 | if (sk->sk_state != TCP_LISTEN || DN_SK(sk)->state != DN_O) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | release_sock(sk); |
| 1089 | return -EINVAL; |
| 1090 | } |
| 1091 | |
| 1092 | skb = skb_dequeue(&sk->sk_receive_queue); |
| 1093 | if (skb == NULL) { |
| 1094 | skb = dn_wait_for_connect(sk, &timeo); |
| 1095 | if (IS_ERR(skb)) { |
| 1096 | release_sock(sk); |
| 1097 | return PTR_ERR(skb); |
| 1098 | } |
| 1099 | } |
| 1100 | |
| 1101 | cb = DN_SKB_CB(skb); |
| 1102 | sk->sk_ack_backlog--; |
David Howells | cdfbabf | 2017-03-09 08:09:05 +0000 | [diff] [blame] | 1103 | newsk = dn_alloc_sock(sock_net(sk), newsock, sk->sk_allocation, kern); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1104 | if (newsk == NULL) { |
| 1105 | release_sock(sk); |
| 1106 | kfree_skb(skb); |
| 1107 | return -ENOBUFS; |
| 1108 | } |
| 1109 | release_sock(sk); |
| 1110 | |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 1111 | dst = skb_dst(skb); |
Eric Dumazet | b6c6712 | 2010-04-08 23:03:29 +0000 | [diff] [blame] | 1112 | sk_dst_set(newsk, dst); |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 1113 | skb_dst_set(skb, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1114 | |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 1115 | DN_SK(newsk)->state = DN_CR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1116 | DN_SK(newsk)->addrrem = cb->src_port; |
| 1117 | DN_SK(newsk)->services_rem = cb->services; |
| 1118 | DN_SK(newsk)->info_rem = cb->info; |
| 1119 | DN_SK(newsk)->segsize_rem = cb->segsize; |
| 1120 | DN_SK(newsk)->accept_mode = DN_SK(sk)->accept_mode; |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 1121 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1122 | if (DN_SK(newsk)->segsize_rem < 230) |
| 1123 | DN_SK(newsk)->segsize_rem = 230; |
| 1124 | |
| 1125 | if ((DN_SK(newsk)->services_rem & NSP_FC_MASK) == NSP_FC_NONE) |
| 1126 | DN_SK(newsk)->max_window = decnet_no_fc_max_cwnd; |
| 1127 | |
| 1128 | newsk->sk_state = TCP_LISTEN; |
| 1129 | memcpy(&(DN_SK(newsk)->addr), &(DN_SK(sk)->addr), sizeof(struct sockaddr_dn)); |
| 1130 | |
| 1131 | /* |
| 1132 | * If we are listening on a wild socket, we don't want |
| 1133 | * the newly created socket on the wrong hash queue. |
| 1134 | */ |
| 1135 | DN_SK(newsk)->addr.sdn_flags &= ~SDF_WILD; |
| 1136 | |
| 1137 | skb_pull(skb, dn_username2sockaddr(skb->data, skb->len, &(DN_SK(newsk)->addr), &type)); |
| 1138 | skb_pull(skb, dn_username2sockaddr(skb->data, skb->len, &(DN_SK(newsk)->peer), &type)); |
Steven Whitehouse | c4ea94a | 2006-03-20 22:42:39 -0800 | [diff] [blame] | 1139 | *(__le16 *)(DN_SK(newsk)->peer.sdn_add.a_addr) = cb->src; |
| 1140 | *(__le16 *)(DN_SK(newsk)->addr.sdn_add.a_addr) = cb->dst; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1141 | |
| 1142 | menuver = *skb->data; |
| 1143 | skb_pull(skb, 1); |
| 1144 | |
| 1145 | if (menuver & DN_MENUVER_ACC) |
| 1146 | dn_access_copy(skb, &(DN_SK(newsk)->accessdata)); |
| 1147 | |
| 1148 | if (menuver & DN_MENUVER_USR) |
| 1149 | dn_user_copy(skb, &(DN_SK(newsk)->conndata_in)); |
| 1150 | |
| 1151 | if (menuver & DN_MENUVER_PRX) |
| 1152 | DN_SK(newsk)->peer.sdn_flags |= SDF_PROXY; |
| 1153 | |
| 1154 | if (menuver & DN_MENUVER_UIC) |
| 1155 | DN_SK(newsk)->peer.sdn_flags |= SDF_UICPROXY; |
| 1156 | |
| 1157 | kfree_skb(skb); |
| 1158 | |
| 1159 | memcpy(&(DN_SK(newsk)->conndata_out), &(DN_SK(sk)->conndata_out), |
| 1160 | sizeof(struct optdata_dn)); |
| 1161 | memcpy(&(DN_SK(newsk)->discdata_out), &(DN_SK(sk)->discdata_out), |
| 1162 | sizeof(struct optdata_dn)); |
| 1163 | |
| 1164 | lock_sock(newsk); |
| 1165 | err = dn_hash_sock(newsk); |
| 1166 | if (err == 0) { |
| 1167 | sock_reset_flag(newsk, SOCK_ZAPPED); |
| 1168 | dn_send_conn_ack(newsk); |
| 1169 | |
| 1170 | /* |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 1171 | * Here we use sk->sk_allocation since although the conn conf is |
| 1172 | * for the newsk, the context is the old socket. |
| 1173 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1174 | if (DN_SK(newsk)->accept_mode == ACC_IMMED) |
| 1175 | err = dn_confirm_accept(newsk, &timeo, |
| 1176 | sk->sk_allocation); |
| 1177 | } |
| 1178 | release_sock(newsk); |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 1179 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1180 | } |
| 1181 | |
| 1182 | |
Denys Vlasenko | 9b2c45d | 2018-02-12 20:00:20 +0100 | [diff] [blame] | 1183 | static int dn_getname(struct socket *sock, struct sockaddr *uaddr,int peer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1184 | { |
| 1185 | struct sockaddr_dn *sa = (struct sockaddr_dn *)uaddr; |
| 1186 | struct sock *sk = sock->sk; |
| 1187 | struct dn_scp *scp = DN_SK(sk); |
| 1188 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1189 | lock_sock(sk); |
| 1190 | |
| 1191 | if (peer) { |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 1192 | if ((sock->state != SS_CONNECTED && |
| 1193 | sock->state != SS_CONNECTING) && |
Patrick McHardy | 52c41a3 | 2006-10-12 01:48:20 -0700 | [diff] [blame] | 1194 | scp->accept_mode == ACC_IMMED) { |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 1195 | release_sock(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1196 | return -ENOTCONN; |
Patrick McHardy | 52c41a3 | 2006-10-12 01:48:20 -0700 | [diff] [blame] | 1197 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1198 | |
| 1199 | memcpy(sa, &scp->peer, sizeof(struct sockaddr_dn)); |
| 1200 | } else { |
| 1201 | memcpy(sa, &scp->addr, sizeof(struct sockaddr_dn)); |
| 1202 | } |
| 1203 | |
| 1204 | release_sock(sk); |
| 1205 | |
Denys Vlasenko | 9b2c45d | 2018-02-12 20:00:20 +0100 | [diff] [blame] | 1206 | return sizeof(struct sockaddr_dn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1207 | } |
| 1208 | |
| 1209 | |
Linus Torvalds | a11e1d4 | 2018-06-28 09:43:44 -0700 | [diff] [blame^] | 1210 | static __poll_t dn_poll(struct file *file, struct socket *sock, poll_table *wait) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1211 | { |
| 1212 | struct sock *sk = sock->sk; |
| 1213 | struct dn_scp *scp = DN_SK(sk); |
Linus Torvalds | a11e1d4 | 2018-06-28 09:43:44 -0700 | [diff] [blame^] | 1214 | __poll_t mask = datagram_poll(file, sock, wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1215 | |
David S. Miller | b03efcf | 2005-07-08 14:57:23 -0700 | [diff] [blame] | 1216 | if (!skb_queue_empty(&scp->other_receive_queue)) |
Linus Torvalds | a9a0884 | 2018-02-11 14:34:03 -0800 | [diff] [blame] | 1217 | mask |= EPOLLRDBAND; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1218 | |
| 1219 | return mask; |
| 1220 | } |
| 1221 | |
| 1222 | static int dn_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
| 1223 | { |
| 1224 | struct sock *sk = sock->sk; |
| 1225 | struct dn_scp *scp = DN_SK(sk); |
| 1226 | int err = -EOPNOTSUPP; |
| 1227 | long amount = 0; |
| 1228 | struct sk_buff *skb; |
| 1229 | int val; |
| 1230 | |
| 1231 | switch(cmd) |
| 1232 | { |
| 1233 | case SIOCGIFADDR: |
| 1234 | case SIOCSIFADDR: |
| 1235 | return dn_dev_ioctl(cmd, (void __user *)arg); |
| 1236 | |
| 1237 | case SIOCATMARK: |
| 1238 | lock_sock(sk); |
David S. Miller | b03efcf | 2005-07-08 14:57:23 -0700 | [diff] [blame] | 1239 | val = !skb_queue_empty(&scp->other_receive_queue); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1240 | if (scp->state != DN_RUN) |
| 1241 | val = -ENOTCONN; |
| 1242 | release_sock(sk); |
| 1243 | return val; |
| 1244 | |
| 1245 | case TIOCOUTQ: |
Eric Dumazet | 31e6d36 | 2009-06-17 19:05:41 -0700 | [diff] [blame] | 1246 | amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1247 | if (amount < 0) |
| 1248 | amount = 0; |
| 1249 | err = put_user(amount, (int __user *)arg); |
| 1250 | break; |
| 1251 | |
| 1252 | case TIOCINQ: |
| 1253 | lock_sock(sk); |
Hannes Eder | e57c624 | 2009-02-25 10:32:39 +0000 | [diff] [blame] | 1254 | skb = skb_peek(&scp->other_receive_queue); |
| 1255 | if (skb) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1256 | amount = skb->len; |
| 1257 | } else { |
David S. Miller | bec571e | 2009-05-28 16:43:52 -0700 | [diff] [blame] | 1258 | skb_queue_walk(&sk->sk_receive_queue, skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1259 | amount += skb->len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1260 | } |
| 1261 | release_sock(sk); |
| 1262 | err = put_user(amount, (int __user *)arg); |
| 1263 | break; |
| 1264 | |
| 1265 | default: |
Christoph Hellwig | b5e5fa5 | 2006-01-03 14:18:33 -0800 | [diff] [blame] | 1266 | err = -ENOIOCTLCMD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1267 | break; |
| 1268 | } |
| 1269 | |
| 1270 | return err; |
| 1271 | } |
| 1272 | |
| 1273 | static int dn_listen(struct socket *sock, int backlog) |
| 1274 | { |
| 1275 | struct sock *sk = sock->sk; |
| 1276 | int err = -EINVAL; |
| 1277 | |
| 1278 | lock_sock(sk); |
| 1279 | |
| 1280 | if (sock_flag(sk, SOCK_ZAPPED)) |
| 1281 | goto out; |
| 1282 | |
| 1283 | if ((DN_SK(sk)->state != DN_O) || (sk->sk_state == TCP_LISTEN)) |
| 1284 | goto out; |
| 1285 | |
| 1286 | sk->sk_max_ack_backlog = backlog; |
| 1287 | sk->sk_ack_backlog = 0; |
| 1288 | sk->sk_state = TCP_LISTEN; |
| 1289 | err = 0; |
| 1290 | dn_rehash_sock(sk); |
| 1291 | |
| 1292 | out: |
| 1293 | release_sock(sk); |
| 1294 | |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 1295 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1296 | } |
| 1297 | |
| 1298 | |
| 1299 | static int dn_shutdown(struct socket *sock, int how) |
| 1300 | { |
| 1301 | struct sock *sk = sock->sk; |
| 1302 | struct dn_scp *scp = DN_SK(sk); |
| 1303 | int err = -ENOTCONN; |
| 1304 | |
| 1305 | lock_sock(sk); |
| 1306 | |
| 1307 | if (sock->state == SS_UNCONNECTED) |
| 1308 | goto out; |
| 1309 | |
| 1310 | err = 0; |
| 1311 | if (sock->state == SS_DISCONNECTING) |
| 1312 | goto out; |
| 1313 | |
| 1314 | err = -EINVAL; |
| 1315 | if (scp->state == DN_O) |
| 1316 | goto out; |
| 1317 | |
Xi Wang | 46b66d7 | 2012-08-26 16:37:07 +0000 | [diff] [blame] | 1318 | if (how != SHUT_RDWR) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1319 | goto out; |
| 1320 | |
Xi Wang | 46b66d7 | 2012-08-26 16:37:07 +0000 | [diff] [blame] | 1321 | sk->sk_shutdown = SHUTDOWN_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1322 | dn_destroy_sock(sk); |
| 1323 | err = 0; |
| 1324 | |
| 1325 | out: |
| 1326 | release_sock(sk); |
| 1327 | |
| 1328 | return err; |
| 1329 | } |
| 1330 | |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 1331 | static int dn_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1332 | { |
| 1333 | struct sock *sk = sock->sk; |
| 1334 | int err; |
| 1335 | |
| 1336 | lock_sock(sk); |
| 1337 | err = __dn_setsockopt(sock, level, optname, optval, optlen, 0); |
| 1338 | release_sock(sk); |
Paolo Abeni | dfec091 | 2018-02-15 16:59:49 +0100 | [diff] [blame] | 1339 | #ifdef CONFIG_NETFILTER |
| 1340 | /* we need to exclude all possible ENOPROTOOPTs except default case */ |
| 1341 | if (err == -ENOPROTOOPT && optname != DSO_LINKINFO && |
| 1342 | optname != DSO_STREAM && optname != DSO_SEQPACKET) |
| 1343 | err = nf_setsockopt(sk, PF_DECnet, optname, optval, optlen); |
| 1344 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1345 | |
| 1346 | return err; |
| 1347 | } |
| 1348 | |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 1349 | static int __dn_setsockopt(struct socket *sock, int level,int optname, char __user *optval, unsigned int optlen, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1350 | { |
| 1351 | struct sock *sk = sock->sk; |
| 1352 | struct dn_scp *scp = DN_SK(sk); |
| 1353 | long timeo; |
| 1354 | union { |
| 1355 | struct optdata_dn opt; |
| 1356 | struct accessdata_dn acc; |
| 1357 | int mode; |
| 1358 | unsigned long win; |
| 1359 | int val; |
| 1360 | unsigned char services; |
| 1361 | unsigned char info; |
| 1362 | } u; |
| 1363 | int err; |
| 1364 | |
| 1365 | if (optlen && !optval) |
| 1366 | return -EINVAL; |
| 1367 | |
| 1368 | if (optlen > sizeof(u)) |
| 1369 | return -EINVAL; |
| 1370 | |
| 1371 | if (copy_from_user(&u, optval, optlen)) |
| 1372 | return -EFAULT; |
| 1373 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1374 | switch (optname) { |
| 1375 | case DSO_CONDATA: |
| 1376 | if (sock->state == SS_CONNECTED) |
| 1377 | return -EISCONN; |
| 1378 | if ((scp->state != DN_O) && (scp->state != DN_CR)) |
| 1379 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1380 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1381 | if (optlen != sizeof(struct optdata_dn)) |
| 1382 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1383 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1384 | if (le16_to_cpu(u.opt.opt_optl) > 16) |
| 1385 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1386 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1387 | memcpy(&scp->conndata_out, &u.opt, optlen); |
| 1388 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1389 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1390 | case DSO_DISDATA: |
| 1391 | if (sock->state != SS_CONNECTED && |
| 1392 | scp->accept_mode == ACC_IMMED) |
| 1393 | return -ENOTCONN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1394 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1395 | if (optlen != sizeof(struct optdata_dn)) |
| 1396 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1397 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1398 | if (le16_to_cpu(u.opt.opt_optl) > 16) |
| 1399 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1400 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1401 | memcpy(&scp->discdata_out, &u.opt, optlen); |
| 1402 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1403 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1404 | case DSO_CONACCESS: |
| 1405 | if (sock->state == SS_CONNECTED) |
| 1406 | return -EISCONN; |
| 1407 | if (scp->state != DN_O) |
| 1408 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1409 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1410 | if (optlen != sizeof(struct accessdata_dn)) |
| 1411 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1412 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1413 | if ((u.acc.acc_accl > DN_MAXACCL) || |
| 1414 | (u.acc.acc_passl > DN_MAXACCL) || |
| 1415 | (u.acc.acc_userl > DN_MAXACCL)) |
| 1416 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1417 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1418 | memcpy(&scp->accessdata, &u.acc, optlen); |
| 1419 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1420 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1421 | case DSO_ACCEPTMODE: |
| 1422 | if (sock->state == SS_CONNECTED) |
| 1423 | return -EISCONN; |
| 1424 | if (scp->state != DN_O) |
| 1425 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1426 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1427 | if (optlen != sizeof(int)) |
| 1428 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1429 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1430 | if ((u.mode != ACC_IMMED) && (u.mode != ACC_DEFER)) |
| 1431 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1432 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1433 | scp->accept_mode = (unsigned char)u.mode; |
| 1434 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1435 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1436 | case DSO_CONACCEPT: |
| 1437 | if (scp->state != DN_CR) |
| 1438 | return -EINVAL; |
| 1439 | timeo = sock_rcvtimeo(sk, 0); |
| 1440 | err = dn_confirm_accept(sk, &timeo, sk->sk_allocation); |
| 1441 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1442 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1443 | case DSO_CONREJECT: |
| 1444 | if (scp->state != DN_CR) |
| 1445 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1446 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1447 | scp->state = DN_DR; |
| 1448 | sk->sk_shutdown = SHUTDOWN_MASK; |
| 1449 | dn_nsp_send_disc(sk, 0x38, 0, sk->sk_allocation); |
| 1450 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1451 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1452 | case DSO_MAXWINDOW: |
| 1453 | if (optlen != sizeof(unsigned long)) |
| 1454 | return -EINVAL; |
| 1455 | if (u.win > NSP_MAX_WINDOW) |
| 1456 | u.win = NSP_MAX_WINDOW; |
| 1457 | if (u.win == 0) |
| 1458 | return -EINVAL; |
| 1459 | scp->max_window = u.win; |
| 1460 | if (scp->snd_window > u.win) |
| 1461 | scp->snd_window = u.win; |
| 1462 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1463 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1464 | case DSO_NODELAY: |
| 1465 | if (optlen != sizeof(int)) |
| 1466 | return -EINVAL; |
Gao Feng | 9c28286 | 2017-03-04 22:10:28 +0800 | [diff] [blame] | 1467 | if (scp->nonagle == TCP_NAGLE_CORK) |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1468 | return -EINVAL; |
Gao Feng | 9c28286 | 2017-03-04 22:10:28 +0800 | [diff] [blame] | 1469 | scp->nonagle = (u.val == 0) ? 0 : TCP_NAGLE_OFF; |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1470 | /* if (scp->nonagle == 1) { Push pending frames } */ |
| 1471 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1472 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1473 | case DSO_CORK: |
| 1474 | if (optlen != sizeof(int)) |
| 1475 | return -EINVAL; |
Gao Feng | 9c28286 | 2017-03-04 22:10:28 +0800 | [diff] [blame] | 1476 | if (scp->nonagle == TCP_NAGLE_OFF) |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1477 | return -EINVAL; |
Gao Feng | 9c28286 | 2017-03-04 22:10:28 +0800 | [diff] [blame] | 1478 | scp->nonagle = (u.val == 0) ? 0 : TCP_NAGLE_CORK; |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1479 | /* if (scp->nonagle == 0) { Push pending frames } */ |
| 1480 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1481 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1482 | case DSO_SERVICES: |
| 1483 | if (optlen != sizeof(unsigned char)) |
| 1484 | return -EINVAL; |
| 1485 | if ((u.services & ~NSP_FC_MASK) != 0x01) |
| 1486 | return -EINVAL; |
| 1487 | if ((u.services & NSP_FC_MASK) == NSP_FC_MASK) |
| 1488 | return -EINVAL; |
| 1489 | scp->services_loc = u.services; |
| 1490 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1491 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1492 | case DSO_INFO: |
| 1493 | if (optlen != sizeof(unsigned char)) |
| 1494 | return -EINVAL; |
| 1495 | if (u.info & 0xfc) |
| 1496 | return -EINVAL; |
| 1497 | scp->info_loc = u.info; |
| 1498 | break; |
Paolo Abeni | dfec091 | 2018-02-15 16:59:49 +0100 | [diff] [blame] | 1499 | |
| 1500 | case DSO_LINKINFO: |
| 1501 | case DSO_STREAM: |
| 1502 | case DSO_SEQPACKET: |
| 1503 | default: |
| 1504 | return -ENOPROTOOPT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1505 | } |
| 1506 | |
| 1507 | return 0; |
| 1508 | } |
| 1509 | |
| 1510 | static int dn_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) |
| 1511 | { |
| 1512 | struct sock *sk = sock->sk; |
| 1513 | int err; |
| 1514 | |
| 1515 | lock_sock(sk); |
| 1516 | err = __dn_getsockopt(sock, level, optname, optval, optlen, 0); |
| 1517 | release_sock(sk); |
Paolo Abeni | dfec091 | 2018-02-15 16:59:49 +0100 | [diff] [blame] | 1518 | #ifdef CONFIG_NETFILTER |
| 1519 | if (err == -ENOPROTOOPT && optname != DSO_STREAM && |
| 1520 | optname != DSO_SEQPACKET && optname != DSO_CONACCEPT && |
| 1521 | optname != DSO_CONREJECT) { |
| 1522 | int len; |
| 1523 | |
| 1524 | if (get_user(len, optlen)) |
| 1525 | return -EFAULT; |
| 1526 | |
| 1527 | err = nf_getsockopt(sk, PF_DECnet, optname, optval, &len); |
| 1528 | if (err >= 0) |
| 1529 | err = put_user(len, optlen); |
| 1530 | } |
| 1531 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1532 | |
| 1533 | return err; |
| 1534 | } |
| 1535 | |
| 1536 | static int __dn_getsockopt(struct socket *sock, int level,int optname, char __user *optval,int __user *optlen, int flags) |
| 1537 | { |
| 1538 | struct sock *sk = sock->sk; |
| 1539 | struct dn_scp *scp = DN_SK(sk); |
| 1540 | struct linkinfo_dn link; |
| 1541 | unsigned int r_len; |
| 1542 | void *r_data = NULL; |
| 1543 | unsigned int val; |
| 1544 | |
| 1545 | if(get_user(r_len , optlen)) |
| 1546 | return -EFAULT; |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 1547 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1548 | switch (optname) { |
| 1549 | case DSO_CONDATA: |
| 1550 | if (r_len > sizeof(struct optdata_dn)) |
| 1551 | r_len = sizeof(struct optdata_dn); |
| 1552 | r_data = &scp->conndata_in; |
| 1553 | break; |
| 1554 | |
| 1555 | case DSO_DISDATA: |
| 1556 | if (r_len > sizeof(struct optdata_dn)) |
| 1557 | r_len = sizeof(struct optdata_dn); |
| 1558 | r_data = &scp->discdata_in; |
| 1559 | break; |
| 1560 | |
| 1561 | case DSO_CONACCESS: |
| 1562 | if (r_len > sizeof(struct accessdata_dn)) |
| 1563 | r_len = sizeof(struct accessdata_dn); |
| 1564 | r_data = &scp->accessdata; |
| 1565 | break; |
| 1566 | |
| 1567 | case DSO_ACCEPTMODE: |
| 1568 | if (r_len > sizeof(unsigned char)) |
| 1569 | r_len = sizeof(unsigned char); |
| 1570 | r_data = &scp->accept_mode; |
| 1571 | break; |
| 1572 | |
| 1573 | case DSO_LINKINFO: |
| 1574 | if (r_len > sizeof(struct linkinfo_dn)) |
| 1575 | r_len = sizeof(struct linkinfo_dn); |
| 1576 | |
| 1577 | memset(&link, 0, sizeof(link)); |
| 1578 | |
| 1579 | switch (sock->state) { |
| 1580 | case SS_CONNECTING: |
| 1581 | link.idn_linkstate = LL_CONNECTING; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1582 | break; |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1583 | case SS_DISCONNECTING: |
| 1584 | link.idn_linkstate = LL_DISCONNECTING; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1585 | break; |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1586 | case SS_CONNECTED: |
| 1587 | link.idn_linkstate = LL_RUNNING; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1588 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1589 | default: |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1590 | link.idn_linkstate = LL_INACTIVE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1591 | } |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1592 | |
| 1593 | link.idn_segsize = scp->segsize_rem; |
| 1594 | r_data = &link; |
| 1595 | break; |
| 1596 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1597 | case DSO_MAXWINDOW: |
| 1598 | if (r_len > sizeof(unsigned long)) |
| 1599 | r_len = sizeof(unsigned long); |
| 1600 | r_data = &scp->max_window; |
| 1601 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1602 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1603 | case DSO_NODELAY: |
| 1604 | if (r_len > sizeof(int)) |
| 1605 | r_len = sizeof(int); |
Gao Feng | 9c28286 | 2017-03-04 22:10:28 +0800 | [diff] [blame] | 1606 | val = (scp->nonagle == TCP_NAGLE_OFF); |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1607 | r_data = &val; |
| 1608 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1609 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1610 | case DSO_CORK: |
| 1611 | if (r_len > sizeof(int)) |
| 1612 | r_len = sizeof(int); |
Gao Feng | 9c28286 | 2017-03-04 22:10:28 +0800 | [diff] [blame] | 1613 | val = (scp->nonagle == TCP_NAGLE_CORK); |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1614 | r_data = &val; |
| 1615 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1616 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1617 | case DSO_SERVICES: |
| 1618 | if (r_len > sizeof(unsigned char)) |
| 1619 | r_len = sizeof(unsigned char); |
| 1620 | r_data = &scp->services_rem; |
| 1621 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1622 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 1623 | case DSO_INFO: |
| 1624 | if (r_len > sizeof(unsigned char)) |
| 1625 | r_len = sizeof(unsigned char); |
| 1626 | r_data = &scp->info_rem; |
| 1627 | break; |
Paolo Abeni | dfec091 | 2018-02-15 16:59:49 +0100 | [diff] [blame] | 1628 | |
| 1629 | case DSO_STREAM: |
| 1630 | case DSO_SEQPACKET: |
| 1631 | case DSO_CONACCEPT: |
| 1632 | case DSO_CONREJECT: |
| 1633 | default: |
| 1634 | return -ENOPROTOOPT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1635 | } |
| 1636 | |
| 1637 | if (r_data) { |
| 1638 | if (copy_to_user(optval, r_data, r_len)) |
| 1639 | return -EFAULT; |
| 1640 | if (put_user(r_len, optlen)) |
| 1641 | return -EFAULT; |
| 1642 | } |
| 1643 | |
| 1644 | return 0; |
| 1645 | } |
| 1646 | |
| 1647 | |
| 1648 | static int dn_data_ready(struct sock *sk, struct sk_buff_head *q, int flags, int target) |
| 1649 | { |
David S. Miller | bec571e | 2009-05-28 16:43:52 -0700 | [diff] [blame] | 1650 | struct sk_buff *skb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1651 | int len = 0; |
| 1652 | |
| 1653 | if (flags & MSG_OOB) |
David S. Miller | b03efcf | 2005-07-08 14:57:23 -0700 | [diff] [blame] | 1654 | return !skb_queue_empty(q) ? 1 : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1655 | |
David S. Miller | bec571e | 2009-05-28 16:43:52 -0700 | [diff] [blame] | 1656 | skb_queue_walk(q, skb) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1657 | struct dn_skb_cb *cb = DN_SKB_CB(skb); |
| 1658 | len += skb->len; |
| 1659 | |
| 1660 | if (cb->nsp_flags & 0x40) { |
| 1661 | /* SOCK_SEQPACKET reads to EOM */ |
| 1662 | if (sk->sk_type == SOCK_SEQPACKET) |
| 1663 | return 1; |
| 1664 | /* so does SOCK_STREAM unless WAITALL is specified */ |
| 1665 | if (!(flags & MSG_WAITALL)) |
| 1666 | return 1; |
| 1667 | } |
| 1668 | |
| 1669 | /* minimum data length for read exceeded */ |
| 1670 | if (len >= target) |
| 1671 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1672 | } |
| 1673 | |
| 1674 | return 0; |
| 1675 | } |
| 1676 | |
| 1677 | |
Ying Xue | 1b78414 | 2015-03-02 15:37:48 +0800 | [diff] [blame] | 1678 | static int dn_recvmsg(struct socket *sock, struct msghdr *msg, size_t size, |
| 1679 | int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1680 | { |
| 1681 | struct sock *sk = sock->sk; |
| 1682 | struct dn_scp *scp = DN_SK(sk); |
| 1683 | struct sk_buff_head *queue = &sk->sk_receive_queue; |
| 1684 | size_t target = size > 1 ? 1 : 0; |
| 1685 | size_t copied = 0; |
| 1686 | int rv = 0; |
David S. Miller | bec571e | 2009-05-28 16:43:52 -0700 | [diff] [blame] | 1687 | struct sk_buff *skb, *n; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1688 | struct dn_skb_cb *cb = NULL; |
| 1689 | unsigned char eor = 0; |
| 1690 | long timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT); |
| 1691 | |
| 1692 | lock_sock(sk); |
| 1693 | |
| 1694 | if (sock_flag(sk, SOCK_ZAPPED)) { |
| 1695 | rv = -EADDRNOTAVAIL; |
| 1696 | goto out; |
| 1697 | } |
| 1698 | |
Patrick Caulfield | 9eb5c94 | 2005-11-11 12:04:28 -0800 | [diff] [blame] | 1699 | if (sk->sk_shutdown & RCV_SHUTDOWN) { |
| 1700 | rv = 0; |
| 1701 | goto out; |
| 1702 | } |
| 1703 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1704 | rv = dn_check_state(sk, NULL, 0, &timeo, flags); |
| 1705 | if (rv) |
| 1706 | goto out; |
| 1707 | |
Patrick Caulfield | c60992d | 2006-03-20 22:43:05 -0800 | [diff] [blame] | 1708 | if (flags & ~(MSG_CMSG_COMPAT|MSG_PEEK|MSG_OOB|MSG_WAITALL|MSG_DONTWAIT|MSG_NOSIGNAL)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1709 | rv = -EOPNOTSUPP; |
| 1710 | goto out; |
| 1711 | } |
| 1712 | |
| 1713 | if (flags & MSG_OOB) |
| 1714 | queue = &scp->other_receive_queue; |
| 1715 | |
| 1716 | if (flags & MSG_WAITALL) |
| 1717 | target = size; |
| 1718 | |
| 1719 | |
| 1720 | /* |
| 1721 | * See if there is data ready to read, sleep if there isn't |
| 1722 | */ |
| 1723 | for(;;) { |
WANG Cong | d9dc8b0 | 2016-11-11 10:20:50 -0800 | [diff] [blame] | 1724 | DEFINE_WAIT_FUNC(wait, woken_wake_function); |
David S. Miller | 22196d3 | 2008-06-17 01:06:01 -0700 | [diff] [blame] | 1725 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1726 | if (sk->sk_err) |
| 1727 | goto out; |
| 1728 | |
David S. Miller | b03efcf | 2005-07-08 14:57:23 -0700 | [diff] [blame] | 1729 | if (!skb_queue_empty(&scp->other_receive_queue)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1730 | if (!(flags & MSG_OOB)) { |
| 1731 | msg->msg_flags |= MSG_OOB; |
| 1732 | if (!scp->other_report) { |
| 1733 | scp->other_report = 1; |
| 1734 | goto out; |
| 1735 | } |
| 1736 | } |
| 1737 | } |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 1738 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1739 | if (scp->state != DN_RUN) |
| 1740 | goto out; |
| 1741 | |
| 1742 | if (signal_pending(current)) { |
| 1743 | rv = sock_intr_errno(timeo); |
| 1744 | goto out; |
| 1745 | } |
| 1746 | |
| 1747 | if (dn_data_ready(sk, queue, flags, target)) |
| 1748 | break; |
| 1749 | |
| 1750 | if (flags & MSG_DONTWAIT) { |
| 1751 | rv = -EWOULDBLOCK; |
| 1752 | goto out; |
| 1753 | } |
| 1754 | |
WANG Cong | d9dc8b0 | 2016-11-11 10:20:50 -0800 | [diff] [blame] | 1755 | add_wait_queue(sk_sleep(sk), &wait); |
Eric Dumazet | 9cd3e07 | 2015-11-29 20:03:10 -0800 | [diff] [blame] | 1756 | sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk); |
WANG Cong | d9dc8b0 | 2016-11-11 10:20:50 -0800 | [diff] [blame] | 1757 | sk_wait_event(sk, &timeo, dn_data_ready(sk, queue, flags, target), &wait); |
Eric Dumazet | 9cd3e07 | 2015-11-29 20:03:10 -0800 | [diff] [blame] | 1758 | sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk); |
WANG Cong | d9dc8b0 | 2016-11-11 10:20:50 -0800 | [diff] [blame] | 1759 | remove_wait_queue(sk_sleep(sk), &wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1760 | } |
| 1761 | |
David S. Miller | bec571e | 2009-05-28 16:43:52 -0700 | [diff] [blame] | 1762 | skb_queue_walk_safe(queue, skb, n) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1763 | unsigned int chunk = skb->len; |
| 1764 | cb = DN_SKB_CB(skb); |
| 1765 | |
| 1766 | if ((chunk + copied) > size) |
| 1767 | chunk = size - copied; |
| 1768 | |
Al Viro | 7eab8d9 | 2014-04-06 21:51:23 -0400 | [diff] [blame] | 1769 | if (memcpy_to_msg(msg, skb->data, chunk)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1770 | rv = -EFAULT; |
| 1771 | break; |
| 1772 | } |
| 1773 | copied += chunk; |
| 1774 | |
| 1775 | if (!(flags & MSG_PEEK)) |
| 1776 | skb_pull(skb, chunk); |
| 1777 | |
| 1778 | eor = cb->nsp_flags & 0x40; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1779 | |
| 1780 | if (skb->len == 0) { |
David S. Miller | 8728b83 | 2005-08-09 19:25:21 -0700 | [diff] [blame] | 1781 | skb_unlink(skb, queue); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1782 | kfree_skb(skb); |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 1783 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1784 | * N.B. Don't refer to skb or cb after this point |
| 1785 | * in loop. |
| 1786 | */ |
| 1787 | if ((scp->flowloc_sw == DN_DONTSEND) && !dn_congested(sk)) { |
| 1788 | scp->flowloc_sw = DN_SEND; |
| 1789 | dn_nsp_send_link(sk, DN_SEND, 0); |
| 1790 | } |
| 1791 | } |
| 1792 | |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 1793 | if (eor) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1794 | if (sk->sk_type == SOCK_SEQPACKET) |
| 1795 | break; |
| 1796 | if (!(flags & MSG_WAITALL)) |
| 1797 | break; |
| 1798 | } |
| 1799 | |
| 1800 | if (flags & MSG_OOB) |
| 1801 | break; |
| 1802 | |
| 1803 | if (copied >= target) |
| 1804 | break; |
| 1805 | } |
| 1806 | |
| 1807 | rv = copied; |
| 1808 | |
| 1809 | |
| 1810 | if (eor && (sk->sk_type == SOCK_SEQPACKET)) |
| 1811 | msg->msg_flags |= MSG_EOR; |
| 1812 | |
| 1813 | out: |
| 1814 | if (rv == 0) |
| 1815 | rv = (flags & MSG_PEEK) ? -sk->sk_err : sock_error(sk); |
| 1816 | |
| 1817 | if ((rv >= 0) && msg->msg_name) { |
Steffen Hurrle | 342dfc3 | 2014-01-17 22:53:15 +0100 | [diff] [blame] | 1818 | __sockaddr_check_size(sizeof(struct sockaddr_dn)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1819 | memcpy(msg->msg_name, &scp->peer, sizeof(struct sockaddr_dn)); |
| 1820 | msg->msg_namelen = sizeof(struct sockaddr_dn); |
| 1821 | } |
| 1822 | |
| 1823 | release_sock(sk); |
| 1824 | |
| 1825 | return rv; |
| 1826 | } |
| 1827 | |
| 1828 | |
| 1829 | static inline int dn_queue_too_long(struct dn_scp *scp, struct sk_buff_head *queue, int flags) |
| 1830 | { |
| 1831 | unsigned char fctype = scp->services_rem & NSP_FC_MASK; |
| 1832 | if (skb_queue_len(queue) >= scp->snd_window) |
| 1833 | return 1; |
| 1834 | if (fctype != NSP_FC_NONE) { |
| 1835 | if (flags & MSG_OOB) { |
| 1836 | if (scp->flowrem_oth == 0) |
| 1837 | return 1; |
| 1838 | } else { |
| 1839 | if (scp->flowrem_dat == 0) |
| 1840 | return 1; |
| 1841 | } |
| 1842 | } |
| 1843 | return 0; |
| 1844 | } |
| 1845 | |
| 1846 | /* |
Michael Opdenacker | 59c5159 | 2007-05-09 08:57:56 +0200 | [diff] [blame] | 1847 | * The DECnet spec requires that the "routing layer" accepts packets which |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1848 | * are at least 230 bytes in size. This excludes any headers which the NSP |
| 1849 | * layer might add, so we always assume that we'll be using the maximal |
| 1850 | * length header on data packets. The variation in length is due to the |
| 1851 | * inclusion (or not) of the two 16 bit acknowledgement fields so it doesn't |
| 1852 | * make much practical difference. |
| 1853 | */ |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 1854 | unsigned int dn_mss_from_pmtu(struct net_device *dev, int mtu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1855 | { |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 1856 | unsigned int mss = 230 - DN_MAX_NSP_DATA_HEADER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1857 | if (dev) { |
Eric Dumazet | fc766e4c | 2010-10-29 03:09:24 +0000 | [diff] [blame] | 1858 | struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1859 | mtu -= LL_RESERVED_SPACE(dev); |
| 1860 | if (dn_db->use_long) |
| 1861 | mtu -= 21; |
| 1862 | else |
| 1863 | mtu -= 6; |
| 1864 | mtu -= DN_MAX_NSP_DATA_HEADER; |
| 1865 | } else { |
| 1866 | /* |
| 1867 | * 21 = long header, 16 = guess at MAC header length |
| 1868 | */ |
| 1869 | mtu -= (21 + DN_MAX_NSP_DATA_HEADER + 16); |
| 1870 | } |
| 1871 | if (mtu > mss) |
| 1872 | mss = mtu; |
| 1873 | return mss; |
| 1874 | } |
| 1875 | |
| 1876 | static inline unsigned int dn_current_mss(struct sock *sk, int flags) |
| 1877 | { |
| 1878 | struct dst_entry *dst = __sk_dst_get(sk); |
| 1879 | struct dn_scp *scp = DN_SK(sk); |
| 1880 | int mss_now = min_t(int, scp->segsize_loc, scp->segsize_rem); |
| 1881 | |
| 1882 | /* Other data messages are limited to 16 bytes per packet */ |
| 1883 | if (flags & MSG_OOB) |
| 1884 | return 16; |
| 1885 | |
| 1886 | /* This works out the maximum size of segment we can send out */ |
| 1887 | if (dst) { |
| 1888 | u32 mtu = dst_mtu(dst); |
| 1889 | mss_now = min_t(int, dn_mss_from_pmtu(dst->dev, mtu), mss_now); |
| 1890 | } |
| 1891 | |
| 1892 | return mss_now; |
| 1893 | } |
| 1894 | |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 1895 | /* |
Patrick Caulfield | 12a49ff | 2005-09-01 17:43:45 -0700 | [diff] [blame] | 1896 | * N.B. We get the timeout wrong here, but then we always did get it |
| 1897 | * wrong before and this is another step along the road to correcting |
| 1898 | * it. It ought to get updated each time we pass through the routine, |
| 1899 | * but in practise it probably doesn't matter too much for now. |
| 1900 | */ |
| 1901 | static inline struct sk_buff *dn_alloc_send_pskb(struct sock *sk, |
| 1902 | unsigned long datalen, int noblock, |
| 1903 | int *errcode) |
| 1904 | { |
| 1905 | struct sk_buff *skb = sock_alloc_send_skb(sk, datalen, |
| 1906 | noblock, errcode); |
| 1907 | if (skb) { |
YOSHIFUJI Hideaki | b98999d | 2007-12-12 03:51:49 +0900 | [diff] [blame] | 1908 | skb->protocol = htons(ETH_P_DNA_RT); |
Patrick Caulfield | 12a49ff | 2005-09-01 17:43:45 -0700 | [diff] [blame] | 1909 | skb->pkt_type = PACKET_OUTGOING; |
| 1910 | } |
| 1911 | return skb; |
| 1912 | } |
| 1913 | |
Ying Xue | 1b78414 | 2015-03-02 15:37:48 +0800 | [diff] [blame] | 1914 | static int dn_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1915 | { |
| 1916 | struct sock *sk = sock->sk; |
| 1917 | struct dn_scp *scp = DN_SK(sk); |
| 1918 | size_t mss; |
| 1919 | struct sk_buff_head *queue = &scp->data_xmit_queue; |
| 1920 | int flags = msg->msg_flags; |
| 1921 | int err = 0; |
| 1922 | size_t sent = 0; |
| 1923 | int addr_len = msg->msg_namelen; |
Steffen Hurrle | 342dfc3 | 2014-01-17 22:53:15 +0100 | [diff] [blame] | 1924 | DECLARE_SOCKADDR(struct sockaddr_dn *, addr, msg->msg_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1925 | struct sk_buff *skb = NULL; |
| 1926 | struct dn_skb_cb *cb; |
| 1927 | size_t len; |
| 1928 | unsigned char fctype; |
Patrick Caulfield | 12a49ff | 2005-09-01 17:43:45 -0700 | [diff] [blame] | 1929 | long timeo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1930 | |
| 1931 | if (flags & ~(MSG_TRYHARD|MSG_OOB|MSG_DONTWAIT|MSG_EOR|MSG_NOSIGNAL|MSG_MORE|MSG_CMSG_COMPAT)) |
| 1932 | return -EOPNOTSUPP; |
| 1933 | |
| 1934 | if (addr_len && (addr_len != sizeof(struct sockaddr_dn))) |
| 1935 | return -EINVAL; |
| 1936 | |
Patrick Caulfield | 12a49ff | 2005-09-01 17:43:45 -0700 | [diff] [blame] | 1937 | lock_sock(sk); |
| 1938 | timeo = sock_sndtimeo(sk, flags & MSG_DONTWAIT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1939 | /* |
| 1940 | * The only difference between stream sockets and sequenced packet |
| 1941 | * sockets is that the stream sockets always behave as if MSG_EOR |
| 1942 | * has been set. |
| 1943 | */ |
| 1944 | if (sock->type == SOCK_STREAM) { |
Patrick Caulfield | 12a49ff | 2005-09-01 17:43:45 -0700 | [diff] [blame] | 1945 | if (flags & MSG_EOR) { |
| 1946 | err = -EINVAL; |
| 1947 | goto out; |
| 1948 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1949 | flags |= MSG_EOR; |
| 1950 | } |
| 1951 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1952 | |
| 1953 | err = dn_check_state(sk, addr, addr_len, &timeo, flags); |
| 1954 | if (err) |
| 1955 | goto out_err; |
| 1956 | |
| 1957 | if (sk->sk_shutdown & SEND_SHUTDOWN) { |
| 1958 | err = -EPIPE; |
Patrick Caulfield | 9eb5c94 | 2005-11-11 12:04:28 -0800 | [diff] [blame] | 1959 | if (!(flags & MSG_NOSIGNAL)) |
| 1960 | send_sig(SIGPIPE, current, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1961 | goto out_err; |
| 1962 | } |
| 1963 | |
| 1964 | if ((flags & MSG_TRYHARD) && sk->sk_dst_cache) |
Eric Dumazet | b6c6712 | 2010-04-08 23:03:29 +0000 | [diff] [blame] | 1965 | dst_negative_advice(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1966 | |
| 1967 | mss = scp->segsize_rem; |
| 1968 | fctype = scp->services_rem & NSP_FC_MASK; |
| 1969 | |
| 1970 | mss = dn_current_mss(sk, flags); |
| 1971 | |
| 1972 | if (flags & MSG_OOB) { |
| 1973 | queue = &scp->other_xmit_queue; |
| 1974 | if (size > mss) { |
| 1975 | err = -EMSGSIZE; |
| 1976 | goto out; |
| 1977 | } |
| 1978 | } |
| 1979 | |
| 1980 | scp->persist_fxn = dn_nsp_xmit_timeout; |
| 1981 | |
| 1982 | while(sent < size) { |
| 1983 | err = sock_error(sk); |
| 1984 | if (err) |
| 1985 | goto out; |
| 1986 | |
| 1987 | if (signal_pending(current)) { |
| 1988 | err = sock_intr_errno(timeo); |
| 1989 | goto out; |
| 1990 | } |
| 1991 | |
| 1992 | /* |
| 1993 | * Calculate size that we wish to send. |
| 1994 | */ |
| 1995 | len = size - sent; |
| 1996 | |
| 1997 | if (len > mss) |
| 1998 | len = mss; |
| 1999 | |
| 2000 | /* |
| 2001 | * Wait for queue size to go down below the window |
| 2002 | * size. |
| 2003 | */ |
| 2004 | if (dn_queue_too_long(scp, queue, flags)) { |
WANG Cong | d9dc8b0 | 2016-11-11 10:20:50 -0800 | [diff] [blame] | 2005 | DEFINE_WAIT_FUNC(wait, woken_wake_function); |
David S. Miller | 22196d3 | 2008-06-17 01:06:01 -0700 | [diff] [blame] | 2006 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2007 | if (flags & MSG_DONTWAIT) { |
| 2008 | err = -EWOULDBLOCK; |
| 2009 | goto out; |
| 2010 | } |
| 2011 | |
WANG Cong | d9dc8b0 | 2016-11-11 10:20:50 -0800 | [diff] [blame] | 2012 | add_wait_queue(sk_sleep(sk), &wait); |
Eric Dumazet | 9cd3e07 | 2015-11-29 20:03:10 -0800 | [diff] [blame] | 2013 | sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk); |
David S. Miller | 22196d3 | 2008-06-17 01:06:01 -0700 | [diff] [blame] | 2014 | sk_wait_event(sk, &timeo, |
WANG Cong | d9dc8b0 | 2016-11-11 10:20:50 -0800 | [diff] [blame] | 2015 | !dn_queue_too_long(scp, queue, flags), &wait); |
Eric Dumazet | 9cd3e07 | 2015-11-29 20:03:10 -0800 | [diff] [blame] | 2016 | sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk); |
WANG Cong | d9dc8b0 | 2016-11-11 10:20:50 -0800 | [diff] [blame] | 2017 | remove_wait_queue(sk_sleep(sk), &wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2018 | continue; |
| 2019 | } |
| 2020 | |
| 2021 | /* |
| 2022 | * Get a suitably sized skb. |
Patrick Caulfield | 12a49ff | 2005-09-01 17:43:45 -0700 | [diff] [blame] | 2023 | * 64 is a bit of a hack really, but its larger than any |
| 2024 | * link-layer headers and has served us well as a good |
| 2025 | * guess as to their real length. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2026 | */ |
Patrick Caulfield | 12a49ff | 2005-09-01 17:43:45 -0700 | [diff] [blame] | 2027 | skb = dn_alloc_send_pskb(sk, len + 64 + DN_MAX_NSP_DATA_HEADER, |
| 2028 | flags & MSG_DONTWAIT, &err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2029 | |
| 2030 | if (err) |
| 2031 | break; |
| 2032 | |
| 2033 | if (!skb) |
| 2034 | continue; |
| 2035 | |
| 2036 | cb = DN_SKB_CB(skb); |
| 2037 | |
Patrick Caulfield | 12a49ff | 2005-09-01 17:43:45 -0700 | [diff] [blame] | 2038 | skb_reserve(skb, 64 + DN_MAX_NSP_DATA_HEADER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2039 | |
Al Viro | 6ce8e9c | 2014-04-06 21:25:44 -0400 | [diff] [blame] | 2040 | if (memcpy_from_msg(skb_put(skb, len), msg, len)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2041 | err = -EFAULT; |
| 2042 | goto out; |
| 2043 | } |
| 2044 | |
| 2045 | if (flags & MSG_OOB) { |
| 2046 | cb->nsp_flags = 0x30; |
| 2047 | if (fctype != NSP_FC_NONE) |
| 2048 | scp->flowrem_oth--; |
| 2049 | } else { |
| 2050 | cb->nsp_flags = 0x00; |
| 2051 | if (scp->seg_total == 0) |
| 2052 | cb->nsp_flags |= 0x20; |
| 2053 | |
| 2054 | scp->seg_total += len; |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 2055 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2056 | if (((sent + len) == size) && (flags & MSG_EOR)) { |
| 2057 | cb->nsp_flags |= 0x40; |
| 2058 | scp->seg_total = 0; |
| 2059 | if (fctype == NSP_FC_SCMC) |
| 2060 | scp->flowrem_dat--; |
| 2061 | } |
| 2062 | if (fctype == NSP_FC_SRC) |
| 2063 | scp->flowrem_dat--; |
| 2064 | } |
| 2065 | |
| 2066 | sent += len; |
| 2067 | dn_nsp_queue_xmit(sk, skb, sk->sk_allocation, flags & MSG_OOB); |
| 2068 | skb = NULL; |
| 2069 | |
| 2070 | scp->persist = dn_nsp_persist(sk); |
| 2071 | |
| 2072 | } |
| 2073 | out: |
| 2074 | |
Wei Yongjun | db849df | 2009-02-25 00:39:01 +0000 | [diff] [blame] | 2075 | kfree_skb(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2076 | |
| 2077 | release_sock(sk); |
| 2078 | |
| 2079 | return sent ? sent : err; |
| 2080 | |
| 2081 | out_err: |
Steven Whitehouse | 001ab02 | 2005-08-10 11:32:57 -0700 | [diff] [blame] | 2082 | err = sk_stream_error(sk, flags, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2083 | release_sock(sk); |
| 2084 | return err; |
| 2085 | } |
| 2086 | |
| 2087 | static int dn_device_event(struct notifier_block *this, unsigned long event, |
Jiri Pirko | 351638e | 2013-05-28 01:30:21 +0000 | [diff] [blame] | 2088 | void *ptr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2089 | { |
Jiri Pirko | 351638e | 2013-05-28 01:30:21 +0000 | [diff] [blame] | 2090 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2091 | |
YOSHIFUJI Hideaki | 721499e | 2008-07-19 22:34:43 -0700 | [diff] [blame] | 2092 | if (!net_eq(dev_net(dev), &init_net)) |
Eric W. Biederman | e9dc865 | 2007-09-12 13:02:17 +0200 | [diff] [blame] | 2093 | return NOTIFY_DONE; |
| 2094 | |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 2095 | switch (event) { |
| 2096 | case NETDEV_UP: |
| 2097 | dn_dev_up(dev); |
| 2098 | break; |
| 2099 | case NETDEV_DOWN: |
| 2100 | dn_dev_down(dev); |
| 2101 | break; |
| 2102 | default: |
| 2103 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2104 | } |
| 2105 | |
| 2106 | return NOTIFY_DONE; |
| 2107 | } |
| 2108 | |
| 2109 | static struct notifier_block dn_dev_notifier = { |
| 2110 | .notifier_call = dn_device_event, |
| 2111 | }; |
| 2112 | |
Stephen Hemminger | 7546dd9 | 2009-03-09 08:18:29 +0000 | [diff] [blame] | 2113 | static struct packet_type dn_dix_packet_type __read_mostly = { |
Harvey Harrison | 09640e6 | 2009-02-01 00:45:17 -0800 | [diff] [blame] | 2114 | .type = cpu_to_be16(ETH_P_DNA_RT), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2115 | .func = dn_route_rcv, |
| 2116 | }; |
| 2117 | |
| 2118 | #ifdef CONFIG_PROC_FS |
| 2119 | struct dn_iter_state { |
| 2120 | int bucket; |
| 2121 | }; |
| 2122 | |
| 2123 | static struct sock *dn_socket_get_first(struct seq_file *seq) |
| 2124 | { |
| 2125 | struct dn_iter_state *state = seq->private; |
| 2126 | struct sock *n = NULL; |
| 2127 | |
| 2128 | for(state->bucket = 0; |
| 2129 | state->bucket < DN_SK_HASH_SIZE; |
| 2130 | ++state->bucket) { |
| 2131 | n = sk_head(&dn_sk_hash[state->bucket]); |
| 2132 | if (n) |
| 2133 | break; |
| 2134 | } |
| 2135 | |
| 2136 | return n; |
| 2137 | } |
| 2138 | |
| 2139 | static struct sock *dn_socket_get_next(struct seq_file *seq, |
| 2140 | struct sock *n) |
| 2141 | { |
| 2142 | struct dn_iter_state *state = seq->private; |
| 2143 | |
| 2144 | n = sk_next(n); |
| 2145 | try_again: |
| 2146 | if (n) |
| 2147 | goto out; |
| 2148 | if (++state->bucket >= DN_SK_HASH_SIZE) |
| 2149 | goto out; |
| 2150 | n = sk_head(&dn_sk_hash[state->bucket]); |
| 2151 | goto try_again; |
| 2152 | out: |
| 2153 | return n; |
| 2154 | } |
| 2155 | |
| 2156 | static struct sock *socket_get_idx(struct seq_file *seq, loff_t *pos) |
| 2157 | { |
| 2158 | struct sock *sk = dn_socket_get_first(seq); |
| 2159 | |
| 2160 | if (sk) { |
| 2161 | while(*pos && (sk = dn_socket_get_next(seq, sk))) |
| 2162 | --*pos; |
| 2163 | } |
| 2164 | return *pos ? NULL : sk; |
| 2165 | } |
| 2166 | |
| 2167 | static void *dn_socket_get_idx(struct seq_file *seq, loff_t pos) |
| 2168 | { |
| 2169 | void *rc; |
| 2170 | read_lock_bh(&dn_hash_lock); |
| 2171 | rc = socket_get_idx(seq, &pos); |
| 2172 | if (!rc) { |
| 2173 | read_unlock_bh(&dn_hash_lock); |
| 2174 | } |
| 2175 | return rc; |
| 2176 | } |
| 2177 | |
| 2178 | static void *dn_socket_seq_start(struct seq_file *seq, loff_t *pos) |
| 2179 | { |
| 2180 | return *pos ? dn_socket_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; |
| 2181 | } |
| 2182 | |
| 2183 | static void *dn_socket_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| 2184 | { |
| 2185 | void *rc; |
| 2186 | |
| 2187 | if (v == SEQ_START_TOKEN) { |
| 2188 | rc = dn_socket_get_idx(seq, 0); |
| 2189 | goto out; |
| 2190 | } |
| 2191 | |
| 2192 | rc = dn_socket_get_next(seq, v); |
| 2193 | if (rc) |
| 2194 | goto out; |
| 2195 | read_unlock_bh(&dn_hash_lock); |
| 2196 | out: |
| 2197 | ++*pos; |
| 2198 | return rc; |
| 2199 | } |
| 2200 | |
| 2201 | static void dn_socket_seq_stop(struct seq_file *seq, void *v) |
| 2202 | { |
| 2203 | if (v && v != SEQ_START_TOKEN) |
| 2204 | read_unlock_bh(&dn_hash_lock); |
| 2205 | } |
| 2206 | |
| 2207 | #define IS_NOT_PRINTABLE(x) ((x) < 32 || (x) > 126) |
| 2208 | |
| 2209 | static void dn_printable_object(struct sockaddr_dn *dn, unsigned char *buf) |
| 2210 | { |
| 2211 | int i; |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 2212 | |
Harvey Harrison | c4106aa | 2008-11-27 00:12:47 -0800 | [diff] [blame] | 2213 | switch (le16_to_cpu(dn->sdn_objnamel)) { |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 2214 | case 0: |
| 2215 | sprintf(buf, "%d", dn->sdn_objnum); |
| 2216 | break; |
| 2217 | default: |
| 2218 | for (i = 0; i < le16_to_cpu(dn->sdn_objnamel); i++) { |
| 2219 | buf[i] = dn->sdn_objname[i]; |
| 2220 | if (IS_NOT_PRINTABLE(buf[i])) |
| 2221 | buf[i] = '.'; |
| 2222 | } |
| 2223 | buf[i] = 0; |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 2224 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2225 | } |
| 2226 | |
| 2227 | static char *dn_state2asc(unsigned char state) |
| 2228 | { |
Joe Perches | 06f8fe1 | 2011-07-01 09:43:03 +0000 | [diff] [blame] | 2229 | switch (state) { |
| 2230 | case DN_O: |
| 2231 | return "OPEN"; |
| 2232 | case DN_CR: |
| 2233 | return " CR"; |
| 2234 | case DN_DR: |
| 2235 | return " DR"; |
| 2236 | case DN_DRC: |
| 2237 | return " DRC"; |
| 2238 | case DN_CC: |
| 2239 | return " CC"; |
| 2240 | case DN_CI: |
| 2241 | return " CI"; |
| 2242 | case DN_NR: |
| 2243 | return " NR"; |
| 2244 | case DN_NC: |
| 2245 | return " NC"; |
| 2246 | case DN_CD: |
| 2247 | return " CD"; |
| 2248 | case DN_RJ: |
| 2249 | return " RJ"; |
| 2250 | case DN_RUN: |
| 2251 | return " RUN"; |
| 2252 | case DN_DI: |
| 2253 | return " DI"; |
| 2254 | case DN_DIC: |
| 2255 | return " DIC"; |
| 2256 | case DN_DN: |
| 2257 | return " DN"; |
| 2258 | case DN_CL: |
| 2259 | return " CL"; |
| 2260 | case DN_CN: |
| 2261 | return " CN"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2262 | } |
| 2263 | |
| 2264 | return "????"; |
| 2265 | } |
| 2266 | |
| 2267 | static inline void dn_socket_format_entry(struct seq_file *seq, struct sock *sk) |
| 2268 | { |
| 2269 | struct dn_scp *scp = DN_SK(sk); |
| 2270 | char buf1[DN_ASCBUF_LEN]; |
| 2271 | char buf2[DN_ASCBUF_LEN]; |
| 2272 | char local_object[DN_MAXOBJL+3]; |
| 2273 | char remote_object[DN_MAXOBJL+3]; |
| 2274 | |
| 2275 | dn_printable_object(&scp->addr, local_object); |
| 2276 | dn_printable_object(&scp->peer, remote_object); |
| 2277 | |
| 2278 | seq_printf(seq, |
| 2279 | "%6s/%04X %04d:%04d %04d:%04d %01d %-16s " |
| 2280 | "%6s/%04X %04d:%04d %04d:%04d %01d %-16s %4s %s\n", |
Harvey Harrison | c4106aa | 2008-11-27 00:12:47 -0800 | [diff] [blame] | 2281 | dn_addr2asc(le16_to_cpu(dn_saddr2dn(&scp->addr)), buf1), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2282 | scp->addrloc, |
| 2283 | scp->numdat, |
| 2284 | scp->numoth, |
| 2285 | scp->ackxmt_dat, |
| 2286 | scp->ackxmt_oth, |
| 2287 | scp->flowloc_sw, |
| 2288 | local_object, |
Harvey Harrison | c4106aa | 2008-11-27 00:12:47 -0800 | [diff] [blame] | 2289 | dn_addr2asc(le16_to_cpu(dn_saddr2dn(&scp->peer)), buf2), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2290 | scp->addrrem, |
| 2291 | scp->numdat_rcv, |
| 2292 | scp->numoth_rcv, |
| 2293 | scp->ackrcv_dat, |
| 2294 | scp->ackrcv_oth, |
| 2295 | scp->flowrem_sw, |
| 2296 | remote_object, |
| 2297 | dn_state2asc(scp->state), |
| 2298 | ((scp->accept_mode == ACC_IMMED) ? "IMMED" : "DEFER")); |
| 2299 | } |
| 2300 | |
| 2301 | static int dn_socket_seq_show(struct seq_file *seq, void *v) |
| 2302 | { |
| 2303 | if (v == SEQ_START_TOKEN) { |
| 2304 | seq_puts(seq, "Local Remote\n"); |
| 2305 | } else { |
| 2306 | dn_socket_format_entry(seq, v); |
| 2307 | } |
| 2308 | return 0; |
| 2309 | } |
| 2310 | |
Philippe De Muyter | 56b3d97 | 2007-07-10 23:07:31 -0700 | [diff] [blame] | 2311 | static const struct seq_operations dn_socket_seq_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2312 | .start = dn_socket_seq_start, |
| 2313 | .next = dn_socket_seq_next, |
| 2314 | .stop = dn_socket_seq_stop, |
| 2315 | .show = dn_socket_seq_show, |
| 2316 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2317 | #endif |
| 2318 | |
Stephen Hemminger | ec1b4cf | 2009-10-05 05:58:39 +0000 | [diff] [blame] | 2319 | static const struct net_proto_family dn_family_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2320 | .family = AF_DECnet, |
| 2321 | .create = dn_create, |
| 2322 | .owner = THIS_MODULE, |
| 2323 | }; |
| 2324 | |
Eric Dumazet | 90ddc4f | 2005-12-22 12:49:22 -0800 | [diff] [blame] | 2325 | static const struct proto_ops dn_proto_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2326 | .family = AF_DECnet, |
| 2327 | .owner = THIS_MODULE, |
| 2328 | .release = dn_release, |
| 2329 | .bind = dn_bind, |
| 2330 | .connect = dn_connect, |
| 2331 | .socketpair = sock_no_socketpair, |
| 2332 | .accept = dn_accept, |
| 2333 | .getname = dn_getname, |
Linus Torvalds | a11e1d4 | 2018-06-28 09:43:44 -0700 | [diff] [blame^] | 2334 | .poll = dn_poll, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2335 | .ioctl = dn_ioctl, |
| 2336 | .listen = dn_listen, |
| 2337 | .shutdown = dn_shutdown, |
| 2338 | .setsockopt = dn_setsockopt, |
| 2339 | .getsockopt = dn_getsockopt, |
| 2340 | .sendmsg = dn_sendmsg, |
| 2341 | .recvmsg = dn_recvmsg, |
| 2342 | .mmap = sock_no_mmap, |
| 2343 | .sendpage = sock_no_sendpage, |
| 2344 | }; |
| 2345 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2346 | MODULE_DESCRIPTION("The Linux DECnet Network Protocol"); |
| 2347 | MODULE_AUTHOR("Linux DECnet Project Team"); |
| 2348 | MODULE_LICENSE("GPL"); |
| 2349 | MODULE_ALIAS_NETPROTO(PF_DECnet); |
| 2350 | |
Kees Cook | 0632466 | 2017-05-08 15:59:05 -0700 | [diff] [blame] | 2351 | static const char banner[] __initconst = KERN_INFO |
| 2352 | "NET4: DECnet for Linux: V.2.5.68s (C) 1995-2003 Linux DECnet Project Team\n"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2353 | |
| 2354 | static int __init decnet_init(void) |
| 2355 | { |
| 2356 | int rc; |
| 2357 | |
YOSHIFUJI Hideaki | 429eb0f | 2007-02-09 23:24:40 +0900 | [diff] [blame] | 2358 | printk(banner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2359 | |
| 2360 | rc = proto_register(&dn_proto, 1); |
| 2361 | if (rc != 0) |
| 2362 | goto out; |
| 2363 | |
| 2364 | dn_neigh_init(); |
| 2365 | dn_dev_init(); |
| 2366 | dn_route_init(); |
| 2367 | dn_fib_init(); |
| 2368 | |
| 2369 | sock_register(&dn_family_ops); |
| 2370 | dev_add_pack(&dn_dix_packet_type); |
| 2371 | register_netdevice_notifier(&dn_dev_notifier); |
| 2372 | |
Christoph Hellwig | 44414d8 | 2018-04-24 17:05:17 +0200 | [diff] [blame] | 2373 | proc_create_seq_private("decnet", 0444, init_net.proc_net, |
| 2374 | &dn_socket_seq_ops, sizeof(struct dn_iter_state), |
| 2375 | NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2376 | dn_register_sysctl(); |
| 2377 | out: |
| 2378 | return rc; |
| 2379 | |
| 2380 | } |
| 2381 | module_init(decnet_init); |
| 2382 | |
| 2383 | /* |
| 2384 | * Prevent DECnet module unloading until its fixed properly. |
| 2385 | * Requires an audit of the code to check for memory leaks and |
| 2386 | * initialisation problems etc. |
| 2387 | */ |
| 2388 | #if 0 |
| 2389 | static void __exit decnet_exit(void) |
| 2390 | { |
| 2391 | sock_unregister(AF_DECnet); |
Thomas Graf | fa34ddd | 2007-03-22 11:57:46 -0700 | [diff] [blame] | 2392 | rtnl_unregister_all(PF_DECnet); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2393 | dev_remove_pack(&dn_dix_packet_type); |
| 2394 | |
| 2395 | dn_unregister_sysctl(); |
| 2396 | |
| 2397 | unregister_netdevice_notifier(&dn_dev_notifier); |
| 2398 | |
| 2399 | dn_route_cleanup(); |
| 2400 | dn_dev_cleanup(); |
| 2401 | dn_neigh_cleanup(); |
| 2402 | dn_fib_cleanup(); |
| 2403 | |
Gao feng | ece31ff | 2013-02-18 01:34:56 +0000 | [diff] [blame] | 2404 | remove_proc_entry("decnet", init_net.proc_net); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2405 | |
| 2406 | proto_unregister(&dn_proto); |
Jesper Dangaard Brouer | 10e8544 | 2009-06-26 10:46:08 +0000 | [diff] [blame] | 2407 | |
| 2408 | rcu_barrier_bh(); /* Wait for completion of call_rcu_bh()'s */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2409 | } |
| 2410 | module_exit(decnet_exit); |
| 2411 | #endif |