Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * Automatic Configuration of IP -- use DHCP, BOOTP, RARP, or |
| 3 | * user-supplied information to configure own IP address and routes. |
| 4 | * |
| 5 | * Copyright (C) 1996-1998 Martin Mares <mj@atrey.karlin.mff.cuni.cz> |
| 6 | * |
| 7 | * Derived from network configuration code in fs/nfs/nfsroot.c, |
| 8 | * originally Copyright (C) 1995, 1996 Gero Kuhlmann and me. |
| 9 | * |
| 10 | * BOOTP rewritten to construct and analyse packets itself instead |
| 11 | * of misusing the IP layer. num_bugs_causing_wrong_arp_replies--; |
| 12 | * -- MJ, December 1998 |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 13 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | * Fixed ip_auto_config_setup calling at startup in the new "Linker Magic" |
| 15 | * initialization scheme. |
| 16 | * - Arnaldo Carvalho de Melo <acme@conectiva.com.br>, 08/11/1999 |
| 17 | * |
| 18 | * DHCP support added. To users this looks like a whole separate |
| 19 | * protocol, but we know it's just a bag on the side of BOOTP. |
| 20 | * -- Chip Salzenberg <chip@valinux.com>, May 2000 |
| 21 | * |
| 22 | * Ported DHCP support from 2.2.16 to 2.4.0-test4 |
| 23 | * -- Eric Biederman <ebiederman@lnxi.com>, 30 Aug 2000 |
| 24 | * |
| 25 | * Merged changes from 2.2.19 into 2.4.3 |
| 26 | * -- Eric Biederman <ebiederman@lnxi.com>, 22 April Aug 2001 |
| 27 | * |
| 28 | * Multiple Nameservers in /proc/net/pnp |
| 29 | * -- Josef Siemes <jsiemes@web.de>, Aug 2002 |
| 30 | */ |
| 31 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include <linux/types.h> |
| 33 | #include <linux/string.h> |
| 34 | #include <linux/kernel.h> |
| 35 | #include <linux/jiffies.h> |
| 36 | #include <linux/random.h> |
| 37 | #include <linux/init.h> |
| 38 | #include <linux/utsname.h> |
| 39 | #include <linux/in.h> |
| 40 | #include <linux/if.h> |
| 41 | #include <linux/inet.h> |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 42 | #include <linux/inetdevice.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #include <linux/netdevice.h> |
| 44 | #include <linux/if_arp.h> |
| 45 | #include <linux/skbuff.h> |
| 46 | #include <linux/ip.h> |
| 47 | #include <linux/socket.h> |
| 48 | #include <linux/route.h> |
| 49 | #include <linux/udp.h> |
| 50 | #include <linux/proc_fs.h> |
| 51 | #include <linux/seq_file.h> |
| 52 | #include <linux/major.h> |
| 53 | #include <linux/root_dev.h> |
| 54 | #include <linux/delay.h> |
Adrian Bunk | 43d6066 | 2005-09-05 18:05:52 -0700 | [diff] [blame] | 55 | #include <linux/nfs_fs.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 56 | #include <linux/slab.h> |
Paul Gortmaker | bc3b2d7 | 2011-07-15 11:47:34 -0400 | [diff] [blame] | 57 | #include <linux/export.h> |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 58 | #include <net/net_namespace.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | #include <net/arp.h> |
| 60 | #include <net/ip.h> |
| 61 | #include <net/ipconfig.h> |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 62 | #include <net/route.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | |
| 64 | #include <asm/uaccess.h> |
| 65 | #include <net/checksum.h> |
| 66 | #include <asm/processor.h> |
| 67 | |
| 68 | /* Define this to allow debugging output */ |
| 69 | #undef IPCONFIG_DEBUG |
| 70 | |
| 71 | #ifdef IPCONFIG_DEBUG |
| 72 | #define DBG(x) printk x |
| 73 | #else |
| 74 | #define DBG(x) do { } while(0) |
| 75 | #endif |
| 76 | |
| 77 | #if defined(CONFIG_IP_PNP_DHCP) |
| 78 | #define IPCONFIG_DHCP |
| 79 | #endif |
| 80 | #if defined(CONFIG_IP_PNP_BOOTP) || defined(CONFIG_IP_PNP_DHCP) |
| 81 | #define IPCONFIG_BOOTP |
| 82 | #endif |
| 83 | #if defined(CONFIG_IP_PNP_RARP) |
| 84 | #define IPCONFIG_RARP |
| 85 | #endif |
| 86 | #if defined(IPCONFIG_BOOTP) || defined(IPCONFIG_RARP) |
| 87 | #define IPCONFIG_DYNAMIC |
| 88 | #endif |
| 89 | |
| 90 | /* Define the friendly delay before and after opening net devices */ |
Micha Nelissen | 3fb72f1 | 2011-05-19 10:14:06 +0000 | [diff] [blame] | 91 | #define CONF_POST_OPEN 10 /* After opening: 10 msecs */ |
| 92 | #define CONF_CARRIER_TIMEOUT 120000 /* Wait for carrier timeout */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | |
| 94 | /* Define the timeout for waiting for a DHCP/BOOTP/RARP reply */ |
| 95 | #define CONF_OPEN_RETRIES 2 /* (Re)open devices twice */ |
| 96 | #define CONF_SEND_RETRIES 6 /* Send six requests per open */ |
| 97 | #define CONF_INTER_TIMEOUT (HZ/2) /* Inter-device timeout: 1/2 second */ |
| 98 | #define CONF_BASE_TIMEOUT (HZ*2) /* Initial timeout: 2 seconds */ |
| 99 | #define CONF_TIMEOUT_RANDOM (HZ) /* Maximum amount of randomization */ |
| 100 | #define CONF_TIMEOUT_MULT *7/4 /* Rate of timeout growth */ |
| 101 | #define CONF_TIMEOUT_MAX (HZ*30) /* Maximum allowed timeout */ |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 102 | #define CONF_NAMESERVERS_MAX 3 /* Maximum number of nameservers |
| 103 | - '3' from resolv.h */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | |
Harvey Harrison | 09640e6 | 2009-02-01 00:45:17 -0800 | [diff] [blame] | 105 | #define NONE cpu_to_be32(INADDR_NONE) |
| 106 | #define ANY cpu_to_be32(INADDR_ANY) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | |
| 108 | /* |
| 109 | * Public IP configuration |
| 110 | */ |
| 111 | |
| 112 | /* This is used by platforms which might be able to set the ipconfig |
| 113 | * variables using firmware environment vars. If this is set, it will |
| 114 | * ignore such firmware variables. |
| 115 | */ |
| 116 | int ic_set_manually __initdata = 0; /* IPconfig parameters set manually */ |
| 117 | |
| 118 | static int ic_enable __initdata = 0; /* IP config enabled? */ |
| 119 | |
| 120 | /* Protocol choice */ |
| 121 | int ic_proto_enabled __initdata = 0 |
| 122 | #ifdef IPCONFIG_BOOTP |
| 123 | | IC_BOOTP |
| 124 | #endif |
| 125 | #ifdef CONFIG_IP_PNP_DHCP |
| 126 | | IC_USE_DHCP |
| 127 | #endif |
| 128 | #ifdef IPCONFIG_RARP |
| 129 | | IC_RARP |
| 130 | #endif |
| 131 | ; |
| 132 | |
| 133 | static int ic_host_name_set __initdata = 0; /* Host name set by us? */ |
| 134 | |
Al Viro | 5a874db | 2006-11-08 00:19:38 -0800 | [diff] [blame] | 135 | __be32 ic_myaddr = NONE; /* My IP address */ |
| 136 | static __be32 ic_netmask = NONE; /* Netmask for local subnet */ |
| 137 | __be32 ic_gateway = NONE; /* Gateway IP address */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | |
Al Viro | 5a874db | 2006-11-08 00:19:38 -0800 | [diff] [blame] | 139 | __be32 ic_servaddr = NONE; /* Boot server IP address */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | |
Al Viro | 5a874db | 2006-11-08 00:19:38 -0800 | [diff] [blame] | 141 | __be32 root_server_addr = NONE; /* Address of NFS server */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | u8 root_server_path[256] = { 0, }; /* Path to mount as root */ |
| 143 | |
Eric Dumazet | 747465e | 2012-01-16 19:27:39 +0000 | [diff] [blame] | 144 | __be32 ic_dev_xid; /* Device under configuration */ |
Chris Friesen | 2513dfb | 2009-05-17 20:39:33 -0700 | [diff] [blame] | 145 | |
David S. Miller | 1b0b04f | 2007-11-19 21:56:16 -0800 | [diff] [blame] | 146 | /* vendor class identifier */ |
| 147 | static char vendor_class_identifier[253] __initdata; |
Rainer Jochem | 62013db | 2007-11-14 02:18:39 -0800 | [diff] [blame] | 148 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | /* Persistent data: */ |
| 150 | |
| 151 | static int ic_proto_used; /* Protocol used, if any */ |
Al Viro | 5a874db | 2006-11-08 00:19:38 -0800 | [diff] [blame] | 152 | static __be32 ic_nameservers[CONF_NAMESERVERS_MAX]; /* DNS Server IP addresses */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | static u8 ic_domain[64]; /* DNS (not NIS) domain name */ |
| 154 | |
| 155 | /* |
| 156 | * Private state. |
| 157 | */ |
| 158 | |
| 159 | /* Name of user-selected boot device */ |
| 160 | static char user_dev_name[IFNAMSIZ] __initdata = { 0, }; |
| 161 | |
| 162 | /* Protocols supported by available interfaces */ |
| 163 | static int ic_proto_have_if __initdata = 0; |
| 164 | |
Chris Friesen | 9643f45 | 2009-05-19 15:31:50 -0700 | [diff] [blame] | 165 | /* MTU for boot device */ |
| 166 | static int ic_dev_mtu __initdata = 0; |
| 167 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | #ifdef IPCONFIG_DYNAMIC |
| 169 | static DEFINE_SPINLOCK(ic_recv_lock); |
| 170 | static volatile int ic_got_reply __initdata = 0; /* Proto(s) that replied */ |
| 171 | #endif |
| 172 | #ifdef IPCONFIG_DHCP |
| 173 | static int ic_dhcp_msgtype __initdata = 0; /* DHCP msg type received */ |
| 174 | #endif |
| 175 | |
| 176 | |
| 177 | /* |
| 178 | * Network devices |
| 179 | */ |
| 180 | |
| 181 | struct ic_device { |
| 182 | struct ic_device *next; |
| 183 | struct net_device *dev; |
| 184 | unsigned short flags; |
| 185 | short able; |
Al Viro | 5a874db | 2006-11-08 00:19:38 -0800 | [diff] [blame] | 186 | __be32 xid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | }; |
| 188 | |
| 189 | static struct ic_device *ic_first_dev __initdata = NULL;/* List of open device */ |
| 190 | static struct net_device *ic_dev __initdata = NULL; /* Selected device */ |
| 191 | |
Micha Nelissen | 3fb72f1 | 2011-05-19 10:14:06 +0000 | [diff] [blame] | 192 | static bool __init ic_is_init_dev(struct net_device *dev) |
David S. Miller | 964ad81 | 2010-03-12 00:00:17 -0800 | [diff] [blame] | 193 | { |
Micha Nelissen | 3fb72f1 | 2011-05-19 10:14:06 +0000 | [diff] [blame] | 194 | if (dev->flags & IFF_LOOPBACK) |
| 195 | return false; |
| 196 | return user_dev_name[0] ? !strcmp(dev->name, user_dev_name) : |
David S. Miller | 964ad81 | 2010-03-12 00:00:17 -0800 | [diff] [blame] | 197 | (!(dev->flags & IFF_LOOPBACK) && |
| 198 | (dev->flags & (IFF_POINTOPOINT|IFF_BROADCAST)) && |
Micha Nelissen | 3fb72f1 | 2011-05-19 10:14:06 +0000 | [diff] [blame] | 199 | strncmp(dev->name, "dummy", 5)); |
David S. Miller | 964ad81 | 2010-03-12 00:00:17 -0800 | [diff] [blame] | 200 | } |
| 201 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | static int __init ic_open_devs(void) |
| 203 | { |
| 204 | struct ic_device *d, **last; |
| 205 | struct net_device *dev; |
| 206 | unsigned short oflags; |
Micha Nelissen | 3fb72f1 | 2011-05-19 10:14:06 +0000 | [diff] [blame] | 207 | unsigned long start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | |
| 209 | last = &ic_first_dev; |
Stephen Hemminger | 6756ae4 | 2006-03-20 22:23:58 -0800 | [diff] [blame] | 210 | rtnl_lock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | |
| 212 | /* bring loopback device up first */ |
Eric W. Biederman | 0cc217e | 2007-09-26 22:10:06 -0700 | [diff] [blame] | 213 | for_each_netdev(&init_net, dev) { |
| 214 | if (!(dev->flags & IFF_LOOPBACK)) |
| 215 | continue; |
| 216 | if (dev_change_flags(dev, dev->flags | IFF_UP) < 0) |
| 217 | printk(KERN_ERR "IP-Config: Failed to open %s\n", dev->name); |
| 218 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 220 | for_each_netdev(&init_net, dev) { |
Micha Nelissen | 3fb72f1 | 2011-05-19 10:14:06 +0000 | [diff] [blame] | 221 | if (ic_is_init_dev(dev)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | int able = 0; |
| 223 | if (dev->mtu >= 364) |
| 224 | able |= IC_BOOTP; |
| 225 | else |
| 226 | printk(KERN_WARNING "DHCP/BOOTP: Ignoring device %s, MTU %d too small", dev->name, dev->mtu); |
| 227 | if (!(dev->flags & IFF_NOARP)) |
| 228 | able |= IC_RARP; |
| 229 | able &= ic_proto_enabled; |
| 230 | if (ic_proto_enabled && !able) |
| 231 | continue; |
| 232 | oflags = dev->flags; |
| 233 | if (dev_change_flags(dev, oflags | IFF_UP) < 0) { |
| 234 | printk(KERN_ERR "IP-Config: Failed to open %s\n", dev->name); |
| 235 | continue; |
| 236 | } |
| 237 | if (!(d = kmalloc(sizeof(struct ic_device), GFP_KERNEL))) { |
Stephen Hemminger | 6756ae4 | 2006-03-20 22:23:58 -0800 | [diff] [blame] | 238 | rtnl_unlock(); |
David S. Miller | 964ad81 | 2010-03-12 00:00:17 -0800 | [diff] [blame] | 239 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | } |
| 241 | d->dev = dev; |
| 242 | *last = d; |
| 243 | last = &d->next; |
| 244 | d->flags = oflags; |
| 245 | d->able = able; |
| 246 | if (able & IC_BOOTP) |
Al Viro | 5a874db | 2006-11-08 00:19:38 -0800 | [diff] [blame] | 247 | get_random_bytes(&d->xid, sizeof(__be32)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | else |
| 249 | d->xid = 0; |
| 250 | ic_proto_have_if |= able; |
| 251 | DBG(("IP-Config: %s UP (able=%d, xid=%08x)\n", |
| 252 | dev->name, able, d->xid)); |
| 253 | } |
| 254 | } |
Micha Nelissen | 3fb72f1 | 2011-05-19 10:14:06 +0000 | [diff] [blame] | 255 | |
Gerlando Falauto | cd7816d | 2011-12-19 22:58:04 +0000 | [diff] [blame] | 256 | /* no point in waiting if we could not bring up at least one device */ |
| 257 | if (!ic_first_dev) |
| 258 | goto have_carrier; |
| 259 | |
Micha Nelissen | 3fb72f1 | 2011-05-19 10:14:06 +0000 | [diff] [blame] | 260 | /* wait for a carrier on at least one device */ |
| 261 | start = jiffies; |
| 262 | while (jiffies - start < msecs_to_jiffies(CONF_CARRIER_TIMEOUT)) { |
| 263 | for_each_netdev(&init_net, dev) |
| 264 | if (ic_is_init_dev(dev) && netif_carrier_ok(dev)) |
| 265 | goto have_carrier; |
| 266 | |
| 267 | msleep(1); |
| 268 | } |
| 269 | have_carrier: |
Stephen Hemminger | 6756ae4 | 2006-03-20 22:23:58 -0800 | [diff] [blame] | 270 | rtnl_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | |
| 272 | *last = NULL; |
| 273 | |
| 274 | if (!ic_first_dev) { |
| 275 | if (user_dev_name[0]) |
| 276 | printk(KERN_ERR "IP-Config: Device `%s' not found.\n", user_dev_name); |
| 277 | else |
| 278 | printk(KERN_ERR "IP-Config: No network devices available.\n"); |
David S. Miller | 964ad81 | 2010-03-12 00:00:17 -0800 | [diff] [blame] | 279 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | } |
| 281 | return 0; |
| 282 | } |
| 283 | |
| 284 | static void __init ic_close_devs(void) |
| 285 | { |
| 286 | struct ic_device *d, *next; |
| 287 | struct net_device *dev; |
| 288 | |
Stephen Hemminger | 6756ae4 | 2006-03-20 22:23:58 -0800 | [diff] [blame] | 289 | rtnl_lock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | next = ic_first_dev; |
| 291 | while ((d = next)) { |
| 292 | next = d->next; |
| 293 | dev = d->dev; |
| 294 | if (dev != ic_dev) { |
| 295 | DBG(("IP-Config: Downing %s\n", dev->name)); |
| 296 | dev_change_flags(dev, d->flags); |
| 297 | } |
| 298 | kfree(d); |
| 299 | } |
Stephen Hemminger | 6756ae4 | 2006-03-20 22:23:58 -0800 | [diff] [blame] | 300 | rtnl_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | } |
| 302 | |
| 303 | /* |
| 304 | * Interface to various network functions. |
| 305 | */ |
| 306 | |
| 307 | static inline void |
Al Viro | 5a874db | 2006-11-08 00:19:38 -0800 | [diff] [blame] | 308 | set_sockaddr(struct sockaddr_in *sin, __be32 addr, __be16 port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | { |
| 310 | sin->sin_family = AF_INET; |
| 311 | sin->sin_addr.s_addr = addr; |
| 312 | sin->sin_port = port; |
| 313 | } |
| 314 | |
Chris Friesen | 9643f45 | 2009-05-19 15:31:50 -0700 | [diff] [blame] | 315 | static int __init ic_devinet_ioctl(unsigned int cmd, struct ifreq *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | { |
| 317 | int res; |
| 318 | |
| 319 | mm_segment_t oldfs = get_fs(); |
| 320 | set_fs(get_ds()); |
Denis V. Lunev | e5b13cb | 2008-02-28 20:51:43 -0800 | [diff] [blame] | 321 | res = devinet_ioctl(&init_net, cmd, (struct ifreq __user *) arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | set_fs(oldfs); |
| 323 | return res; |
| 324 | } |
| 325 | |
Chris Friesen | 9643f45 | 2009-05-19 15:31:50 -0700 | [diff] [blame] | 326 | static int __init ic_dev_ioctl(unsigned int cmd, struct ifreq *arg) |
| 327 | { |
| 328 | int res; |
| 329 | |
| 330 | mm_segment_t oldfs = get_fs(); |
| 331 | set_fs(get_ds()); |
| 332 | res = dev_ioctl(&init_net, cmd, (struct ifreq __user *) arg); |
| 333 | set_fs(oldfs); |
| 334 | return res; |
| 335 | } |
| 336 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | static int __init ic_route_ioctl(unsigned int cmd, struct rtentry *arg) |
| 338 | { |
| 339 | int res; |
| 340 | |
| 341 | mm_segment_t oldfs = get_fs(); |
| 342 | set_fs(get_ds()); |
Denis V. Lunev | 1bad118 | 2008-01-10 03:29:53 -0800 | [diff] [blame] | 343 | res = ip_rt_ioctl(&init_net, cmd, (void __user *) arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | set_fs(oldfs); |
| 345 | return res; |
| 346 | } |
| 347 | |
| 348 | /* |
| 349 | * Set up interface addresses and routes. |
| 350 | */ |
| 351 | |
| 352 | static int __init ic_setup_if(void) |
| 353 | { |
| 354 | struct ifreq ir; |
| 355 | struct sockaddr_in *sin = (void *) &ir.ifr_ifru.ifru_addr; |
| 356 | int err; |
| 357 | |
| 358 | memset(&ir, 0, sizeof(ir)); |
| 359 | strcpy(ir.ifr_ifrn.ifrn_name, ic_dev->name); |
| 360 | set_sockaddr(sin, ic_myaddr, 0); |
Chris Friesen | 9643f45 | 2009-05-19 15:31:50 -0700 | [diff] [blame] | 361 | if ((err = ic_devinet_ioctl(SIOCSIFADDR, &ir)) < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | printk(KERN_ERR "IP-Config: Unable to set interface address (%d).\n", err); |
| 363 | return -1; |
| 364 | } |
| 365 | set_sockaddr(sin, ic_netmask, 0); |
Chris Friesen | 9643f45 | 2009-05-19 15:31:50 -0700 | [diff] [blame] | 366 | if ((err = ic_devinet_ioctl(SIOCSIFNETMASK, &ir)) < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | printk(KERN_ERR "IP-Config: Unable to set interface netmask (%d).\n", err); |
| 368 | return -1; |
| 369 | } |
| 370 | set_sockaddr(sin, ic_myaddr | ~ic_netmask, 0); |
Chris Friesen | 9643f45 | 2009-05-19 15:31:50 -0700 | [diff] [blame] | 371 | if ((err = ic_devinet_ioctl(SIOCSIFBRDADDR, &ir)) < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | printk(KERN_ERR "IP-Config: Unable to set interface broadcast address (%d).\n", err); |
| 373 | return -1; |
| 374 | } |
Chris Friesen | 9643f45 | 2009-05-19 15:31:50 -0700 | [diff] [blame] | 375 | /* Handle the case where we need non-standard MTU on the boot link (a network |
| 376 | * using jumbo frames, for instance). If we can't set the mtu, don't error |
| 377 | * out, we'll try to muddle along. |
| 378 | */ |
| 379 | if (ic_dev_mtu != 0) { |
| 380 | strcpy(ir.ifr_name, ic_dev->name); |
| 381 | ir.ifr_mtu = ic_dev_mtu; |
| 382 | if ((err = ic_dev_ioctl(SIOCSIFMTU, &ir)) < 0) |
| 383 | printk(KERN_ERR "IP-Config: Unable to set interface mtu to %d (%d).\n", |
| 384 | ic_dev_mtu, err); |
| 385 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | return 0; |
| 387 | } |
| 388 | |
| 389 | static int __init ic_setup_routes(void) |
| 390 | { |
| 391 | /* No need to setup device routes, only the default route... */ |
| 392 | |
Al Viro | 5a874db | 2006-11-08 00:19:38 -0800 | [diff] [blame] | 393 | if (ic_gateway != NONE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | struct rtentry rm; |
| 395 | int err; |
| 396 | |
| 397 | memset(&rm, 0, sizeof(rm)); |
| 398 | if ((ic_gateway ^ ic_myaddr) & ic_netmask) { |
| 399 | printk(KERN_ERR "IP-Config: Gateway not on directly connected network.\n"); |
| 400 | return -1; |
| 401 | } |
| 402 | set_sockaddr((struct sockaddr_in *) &rm.rt_dst, 0, 0); |
| 403 | set_sockaddr((struct sockaddr_in *) &rm.rt_genmask, 0, 0); |
| 404 | set_sockaddr((struct sockaddr_in *) &rm.rt_gateway, ic_gateway, 0); |
| 405 | rm.rt_flags = RTF_UP | RTF_GATEWAY; |
| 406 | if ((err = ic_route_ioctl(SIOCADDRT, &rm)) < 0) { |
| 407 | printk(KERN_ERR "IP-Config: Cannot add default route (%d).\n", err); |
| 408 | return -1; |
| 409 | } |
| 410 | } |
| 411 | |
| 412 | return 0; |
| 413 | } |
| 414 | |
| 415 | /* |
| 416 | * Fill in default values for all missing parameters. |
| 417 | */ |
| 418 | |
| 419 | static int __init ic_defaults(void) |
| 420 | { |
| 421 | /* |
| 422 | * At this point we have no userspace running so need not |
| 423 | * claim locks on system_utsname |
| 424 | */ |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 425 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | if (!ic_host_name_set) |
Harvey Harrison | 673d57e | 2008-10-31 00:53:57 -0700 | [diff] [blame] | 427 | sprintf(init_utsname()->nodename, "%pI4", &ic_myaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | |
Al Viro | 5a874db | 2006-11-08 00:19:38 -0800 | [diff] [blame] | 429 | if (root_server_addr == NONE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | root_server_addr = ic_servaddr; |
| 431 | |
Al Viro | 5a874db | 2006-11-08 00:19:38 -0800 | [diff] [blame] | 432 | if (ic_netmask == NONE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | if (IN_CLASSA(ntohl(ic_myaddr))) |
| 434 | ic_netmask = htonl(IN_CLASSA_NET); |
| 435 | else if (IN_CLASSB(ntohl(ic_myaddr))) |
| 436 | ic_netmask = htonl(IN_CLASSB_NET); |
| 437 | else if (IN_CLASSC(ntohl(ic_myaddr))) |
| 438 | ic_netmask = htonl(IN_CLASSC_NET); |
| 439 | else { |
Harvey Harrison | 673d57e | 2008-10-31 00:53:57 -0700 | [diff] [blame] | 440 | printk(KERN_ERR "IP-Config: Unable to guess netmask for address %pI4\n", |
| 441 | &ic_myaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | return -1; |
| 443 | } |
Harvey Harrison | 673d57e | 2008-10-31 00:53:57 -0700 | [diff] [blame] | 444 | printk("IP-Config: Guessing netmask %pI4\n", &ic_netmask); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | } |
| 446 | |
| 447 | return 0; |
| 448 | } |
| 449 | |
| 450 | /* |
| 451 | * RARP support. |
| 452 | */ |
| 453 | |
| 454 | #ifdef IPCONFIG_RARP |
| 455 | |
David S. Miller | f2ccd8f | 2005-08-09 19:34:12 -0700 | [diff] [blame] | 456 | static int ic_rarp_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | |
| 458 | static struct packet_type rarp_packet_type __initdata = { |
Harvey Harrison | 09640e6 | 2009-02-01 00:45:17 -0800 | [diff] [blame] | 459 | .type = cpu_to_be16(ETH_P_RARP), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | .func = ic_rarp_recv, |
| 461 | }; |
| 462 | |
Sam Ravnborg | 45e741b | 2008-04-29 20:58:15 -0700 | [diff] [blame] | 463 | static inline void __init ic_rarp_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | { |
| 465 | dev_add_pack(&rarp_packet_type); |
| 466 | } |
| 467 | |
Sam Ravnborg | 45e741b | 2008-04-29 20:58:15 -0700 | [diff] [blame] | 468 | static inline void __init ic_rarp_cleanup(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | { |
| 470 | dev_remove_pack(&rarp_packet_type); |
| 471 | } |
| 472 | |
| 473 | /* |
| 474 | * Process received RARP packet. |
| 475 | */ |
| 476 | static int __init |
David S. Miller | f2ccd8f | 2005-08-09 19:34:12 -0700 | [diff] [blame] | 477 | ic_rarp_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | { |
| 479 | struct arphdr *rarp; |
| 480 | unsigned char *rarp_ptr; |
Al Viro | 5a874db | 2006-11-08 00:19:38 -0800 | [diff] [blame] | 481 | __be32 sip, tip; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | unsigned char *sha, *tha; /* s for "source", t for "target" */ |
| 483 | struct ic_device *d; |
| 484 | |
YOSHIFUJI Hideaki | 721499e | 2008-07-19 22:34:43 -0700 | [diff] [blame] | 485 | if (!net_eq(dev_net(dev), &init_net)) |
Eric W. Biederman | e730c15 | 2007-09-17 11:53:39 -0700 | [diff] [blame] | 486 | goto drop; |
| 487 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL) |
| 489 | return NET_RX_DROP; |
| 490 | |
| 491 | if (!pskb_may_pull(skb, sizeof(struct arphdr))) |
| 492 | goto drop; |
| 493 | |
| 494 | /* Basic sanity checks can be done without the lock. */ |
Arnaldo Carvalho de Melo | 9c70220 | 2007-04-25 18:04:18 -0700 | [diff] [blame] | 495 | rarp = (struct arphdr *)skb_transport_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | |
| 497 | /* If this test doesn't pass, it's not IP, or we should |
| 498 | * ignore it anyway. |
| 499 | */ |
| 500 | if (rarp->ar_hln != dev->addr_len || dev->type != ntohs(rarp->ar_hrd)) |
| 501 | goto drop; |
| 502 | |
| 503 | /* If it's not a RARP reply, delete it. */ |
| 504 | if (rarp->ar_op != htons(ARPOP_RREPLY)) |
| 505 | goto drop; |
| 506 | |
| 507 | /* If it's not Ethernet, delete it. */ |
| 508 | if (rarp->ar_pro != htons(ETH_P_IP)) |
| 509 | goto drop; |
| 510 | |
Pavel Emelyanov | 988b705 | 2008-03-03 12:20:57 -0800 | [diff] [blame] | 511 | if (!pskb_may_pull(skb, arp_hdr_len(dev))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | goto drop; |
| 513 | |
| 514 | /* OK, it is all there and looks valid, process... */ |
Arnaldo Carvalho de Melo | 9c70220 | 2007-04-25 18:04:18 -0700 | [diff] [blame] | 515 | rarp = (struct arphdr *)skb_transport_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | rarp_ptr = (unsigned char *) (rarp + 1); |
| 517 | |
| 518 | /* One reply at a time, please. */ |
| 519 | spin_lock(&ic_recv_lock); |
| 520 | |
| 521 | /* If we already have a reply, just drop the packet */ |
| 522 | if (ic_got_reply) |
| 523 | goto drop_unlock; |
| 524 | |
| 525 | /* Find the ic_device that the packet arrived on */ |
| 526 | d = ic_first_dev; |
| 527 | while (d && d->dev != dev) |
| 528 | d = d->next; |
| 529 | if (!d) |
| 530 | goto drop_unlock; /* should never happen */ |
| 531 | |
| 532 | /* Extract variable-width fields */ |
| 533 | sha = rarp_ptr; |
| 534 | rarp_ptr += dev->addr_len; |
| 535 | memcpy(&sip, rarp_ptr, 4); |
| 536 | rarp_ptr += 4; |
| 537 | tha = rarp_ptr; |
| 538 | rarp_ptr += dev->addr_len; |
| 539 | memcpy(&tip, rarp_ptr, 4); |
| 540 | |
| 541 | /* Discard packets which are not meant for us. */ |
| 542 | if (memcmp(tha, dev->dev_addr, dev->addr_len)) |
| 543 | goto drop_unlock; |
| 544 | |
| 545 | /* Discard packets which are not from specified server. */ |
Al Viro | 5a874db | 2006-11-08 00:19:38 -0800 | [diff] [blame] | 546 | if (ic_servaddr != NONE && ic_servaddr != sip) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | goto drop_unlock; |
| 548 | |
| 549 | /* We have a winner! */ |
| 550 | ic_dev = dev; |
Al Viro | 5a874db | 2006-11-08 00:19:38 -0800 | [diff] [blame] | 551 | if (ic_myaddr == NONE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | ic_myaddr = tip; |
| 553 | ic_servaddr = sip; |
| 554 | ic_got_reply = IC_RARP; |
| 555 | |
| 556 | drop_unlock: |
| 557 | /* Show's over. Nothing to see here. */ |
| 558 | spin_unlock(&ic_recv_lock); |
| 559 | |
| 560 | drop: |
| 561 | /* Throw the packet out. */ |
| 562 | kfree_skb(skb); |
| 563 | return 0; |
| 564 | } |
| 565 | |
| 566 | |
| 567 | /* |
| 568 | * Send RARP request packet over a single interface. |
| 569 | */ |
| 570 | static void __init ic_rarp_send_if(struct ic_device *d) |
| 571 | { |
| 572 | struct net_device *dev = d->dev; |
| 573 | arp_send(ARPOP_RREQUEST, ETH_P_RARP, 0, dev, 0, NULL, |
| 574 | dev->dev_addr, dev->dev_addr); |
| 575 | } |
| 576 | #endif |
| 577 | |
| 578 | /* |
| 579 | * DHCP/BOOTP support. |
| 580 | */ |
| 581 | |
| 582 | #ifdef IPCONFIG_BOOTP |
| 583 | |
| 584 | struct bootp_pkt { /* BOOTP packet format */ |
| 585 | struct iphdr iph; /* IP header */ |
| 586 | struct udphdr udph; /* UDP header */ |
| 587 | u8 op; /* 1=request, 2=reply */ |
| 588 | u8 htype; /* HW address type */ |
| 589 | u8 hlen; /* HW address length */ |
| 590 | u8 hops; /* Used only by gateways */ |
Al Viro | 5a874db | 2006-11-08 00:19:38 -0800 | [diff] [blame] | 591 | __be32 xid; /* Transaction ID */ |
| 592 | __be16 secs; /* Seconds since we started */ |
| 593 | __be16 flags; /* Just what it says */ |
| 594 | __be32 client_ip; /* Client's IP address if known */ |
| 595 | __be32 your_ip; /* Assigned IP address */ |
| 596 | __be32 server_ip; /* (Next, e.g. NFS) Server's IP address */ |
| 597 | __be32 relay_ip; /* IP address of BOOTP relay */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | u8 hw_addr[16]; /* Client's HW address */ |
| 599 | u8 serv_name[64]; /* Server host name */ |
| 600 | u8 boot_file[128]; /* Name of boot file */ |
| 601 | u8 exten[312]; /* DHCP options / BOOTP vendor extensions */ |
| 602 | }; |
| 603 | |
| 604 | /* packet ops */ |
| 605 | #define BOOTP_REQUEST 1 |
| 606 | #define BOOTP_REPLY 2 |
| 607 | |
| 608 | /* DHCP message types */ |
| 609 | #define DHCPDISCOVER 1 |
| 610 | #define DHCPOFFER 2 |
| 611 | #define DHCPREQUEST 3 |
| 612 | #define DHCPDECLINE 4 |
| 613 | #define DHCPACK 5 |
| 614 | #define DHCPNAK 6 |
| 615 | #define DHCPRELEASE 7 |
| 616 | #define DHCPINFORM 8 |
| 617 | |
David S. Miller | f2ccd8f | 2005-08-09 19:34:12 -0700 | [diff] [blame] | 618 | static int ic_bootp_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | |
| 620 | static struct packet_type bootp_packet_type __initdata = { |
Harvey Harrison | 09640e6 | 2009-02-01 00:45:17 -0800 | [diff] [blame] | 621 | .type = cpu_to_be16(ETH_P_IP), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | .func = ic_bootp_recv, |
| 623 | }; |
| 624 | |
| 625 | |
| 626 | /* |
| 627 | * Initialize DHCP/BOOTP extension fields in the request. |
| 628 | */ |
| 629 | |
| 630 | static const u8 ic_bootp_cookie[4] = { 99, 130, 83, 99 }; |
| 631 | |
| 632 | #ifdef IPCONFIG_DHCP |
| 633 | |
| 634 | static void __init |
| 635 | ic_dhcp_init_options(u8 *options) |
| 636 | { |
Al Viro | 5a874db | 2006-11-08 00:19:38 -0800 | [diff] [blame] | 637 | u8 mt = ((ic_servaddr == NONE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | ? DHCPDISCOVER : DHCPREQUEST); |
| 639 | u8 *e = options; |
Rainer Jochem | 62013db | 2007-11-14 02:18:39 -0800 | [diff] [blame] | 640 | int len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | |
| 642 | #ifdef IPCONFIG_DEBUG |
| 643 | printk("DHCP: Sending message type %d\n", mt); |
| 644 | #endif |
| 645 | |
| 646 | memcpy(e, ic_bootp_cookie, 4); /* RFC1048 Magic Cookie */ |
| 647 | e += 4; |
| 648 | |
| 649 | *e++ = 53; /* DHCP message type */ |
| 650 | *e++ = 1; |
| 651 | *e++ = mt; |
| 652 | |
| 653 | if (mt == DHCPREQUEST) { |
| 654 | *e++ = 54; /* Server ID (IP address) */ |
| 655 | *e++ = 4; |
| 656 | memcpy(e, &ic_servaddr, 4); |
| 657 | e += 4; |
| 658 | |
| 659 | *e++ = 50; /* Requested IP address */ |
| 660 | *e++ = 4; |
| 661 | memcpy(e, &ic_myaddr, 4); |
| 662 | e += 4; |
| 663 | } |
| 664 | |
| 665 | /* always? */ |
| 666 | { |
| 667 | static const u8 ic_req_params[] = { |
| 668 | 1, /* Subnet mask */ |
| 669 | 3, /* Default gateway */ |
| 670 | 6, /* DNS server */ |
| 671 | 12, /* Host name */ |
| 672 | 15, /* Domain name */ |
| 673 | 17, /* Boot path */ |
Chris Friesen | 9643f45 | 2009-05-19 15:31:50 -0700 | [diff] [blame] | 674 | 26, /* MTU */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | 40, /* NIS domain name */ |
| 676 | }; |
| 677 | |
| 678 | *e++ = 55; /* Parameter request list */ |
| 679 | *e++ = sizeof(ic_req_params); |
| 680 | memcpy(e, ic_req_params, sizeof(ic_req_params)); |
| 681 | e += sizeof(ic_req_params); |
Rainer Jochem | 62013db | 2007-11-14 02:18:39 -0800 | [diff] [blame] | 682 | |
Wu Fengguang | 130c0f4 | 2010-05-30 17:19:53 +0000 | [diff] [blame] | 683 | if (ic_host_name_set) { |
| 684 | *e++ = 12; /* host-name */ |
| 685 | len = strlen(utsname()->nodename); |
| 686 | *e++ = len; |
| 687 | memcpy(e, utsname()->nodename, len); |
| 688 | e += len; |
| 689 | } |
Rainer Jochem | 62013db | 2007-11-14 02:18:39 -0800 | [diff] [blame] | 690 | if (*vendor_class_identifier) { |
| 691 | printk(KERN_INFO "DHCP: sending class identifier \"%s\"\n", |
| 692 | vendor_class_identifier); |
| 693 | *e++ = 60; /* Class-identifier */ |
| 694 | len = strlen(vendor_class_identifier); |
| 695 | *e++ = len; |
| 696 | memcpy(e, vendor_class_identifier, len); |
| 697 | e += len; |
| 698 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 699 | } |
| 700 | |
| 701 | *e++ = 255; /* End of the list */ |
| 702 | } |
| 703 | |
| 704 | #endif /* IPCONFIG_DHCP */ |
| 705 | |
| 706 | static void __init ic_bootp_init_ext(u8 *e) |
| 707 | { |
| 708 | memcpy(e, ic_bootp_cookie, 4); /* RFC1048 Magic Cookie */ |
| 709 | e += 4; |
| 710 | *e++ = 1; /* Subnet mask request */ |
| 711 | *e++ = 4; |
| 712 | e += 4; |
| 713 | *e++ = 3; /* Default gateway request */ |
| 714 | *e++ = 4; |
| 715 | e += 4; |
| 716 | *e++ = 5; /* Name server request */ |
| 717 | *e++ = 8; |
| 718 | e += 8; |
| 719 | *e++ = 12; /* Host name request */ |
| 720 | *e++ = 32; |
| 721 | e += 32; |
| 722 | *e++ = 40; /* NIS Domain name request */ |
| 723 | *e++ = 32; |
| 724 | e += 32; |
| 725 | *e++ = 17; /* Boot path */ |
| 726 | *e++ = 40; |
| 727 | e += 40; |
| 728 | |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 729 | *e++ = 57; /* set extension buffer size for reply */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | *e++ = 2; |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 731 | *e++ = 1; /* 128+236+8+20+14, see dhcpd sources */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | *e++ = 150; |
| 733 | |
| 734 | *e++ = 255; /* End of the list */ |
| 735 | } |
| 736 | |
| 737 | |
| 738 | /* |
| 739 | * Initialize the DHCP/BOOTP mechanism. |
| 740 | */ |
Sam Ravnborg | 45e741b | 2008-04-29 20:58:15 -0700 | [diff] [blame] | 741 | static inline void __init ic_bootp_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | { |
| 743 | int i; |
| 744 | |
| 745 | for (i = 0; i < CONF_NAMESERVERS_MAX; i++) |
Al Viro | 5a874db | 2006-11-08 00:19:38 -0800 | [diff] [blame] | 746 | ic_nameservers[i] = NONE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | |
| 748 | dev_add_pack(&bootp_packet_type); |
| 749 | } |
| 750 | |
| 751 | |
| 752 | /* |
| 753 | * DHCP/BOOTP cleanup. |
| 754 | */ |
Sam Ravnborg | 45e741b | 2008-04-29 20:58:15 -0700 | [diff] [blame] | 755 | static inline void __init ic_bootp_cleanup(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | { |
| 757 | dev_remove_pack(&bootp_packet_type); |
| 758 | } |
| 759 | |
| 760 | |
| 761 | /* |
| 762 | * Send DHCP/BOOTP request to single interface. |
| 763 | */ |
| 764 | static void __init ic_bootp_send_if(struct ic_device *d, unsigned long jiffies_diff) |
| 765 | { |
| 766 | struct net_device *dev = d->dev; |
| 767 | struct sk_buff *skb; |
| 768 | struct bootp_pkt *b; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | struct iphdr *h; |
Herbert Xu | 6608824 | 2011-11-18 02:20:04 +0000 | [diff] [blame] | 770 | int hlen = LL_RESERVED_SPACE(dev); |
| 771 | int tlen = dev->needed_tailroom; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | |
| 773 | /* Allocate packet */ |
Herbert Xu | 6608824 | 2011-11-18 02:20:04 +0000 | [diff] [blame] | 774 | skb = alloc_skb(sizeof(struct bootp_pkt) + hlen + tlen + 15, |
Johannes Berg | f5184d2 | 2008-05-12 20:48:31 -0700 | [diff] [blame] | 775 | GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | if (!skb) |
| 777 | return; |
Herbert Xu | 6608824 | 2011-11-18 02:20:04 +0000 | [diff] [blame] | 778 | skb_reserve(skb, hlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | b = (struct bootp_pkt *) skb_put(skb, sizeof(struct bootp_pkt)); |
| 780 | memset(b, 0, sizeof(struct bootp_pkt)); |
| 781 | |
| 782 | /* Construct IP header */ |
Arnaldo Carvalho de Melo | 04b964d | 2007-03-10 19:27:27 -0300 | [diff] [blame] | 783 | skb_reset_network_header(skb); |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 784 | h = ip_hdr(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 785 | h->version = 4; |
| 786 | h->ihl = 5; |
| 787 | h->tot_len = htons(sizeof(struct bootp_pkt)); |
| 788 | h->frag_off = htons(IP_DF); |
| 789 | h->ttl = 64; |
| 790 | h->protocol = IPPROTO_UDP; |
Al Viro | 5a874db | 2006-11-08 00:19:38 -0800 | [diff] [blame] | 791 | h->daddr = htonl(INADDR_BROADCAST); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | h->check = ip_fast_csum((unsigned char *) h, h->ihl); |
| 793 | |
| 794 | /* Construct UDP header */ |
| 795 | b->udph.source = htons(68); |
| 796 | b->udph.dest = htons(67); |
| 797 | b->udph.len = htons(sizeof(struct bootp_pkt) - sizeof(struct iphdr)); |
| 798 | /* UDP checksum not calculated -- explicitly allowed in BOOTP RFC */ |
| 799 | |
| 800 | /* Construct DHCP/BOOTP header */ |
| 801 | b->op = BOOTP_REQUEST; |
| 802 | if (dev->type < 256) /* check for false types */ |
| 803 | b->htype = dev->type; |
| 804 | else if (dev->type == ARPHRD_IEEE802_TR) /* fix for token ring */ |
| 805 | b->htype = ARPHRD_IEEE802; |
| 806 | else if (dev->type == ARPHRD_FDDI) |
| 807 | b->htype = ARPHRD_ETHER; |
| 808 | else { |
| 809 | printk("Unknown ARP type 0x%04x for device %s\n", dev->type, dev->name); |
| 810 | b->htype = dev->type; /* can cause undefined behavior */ |
| 811 | } |
Stephen Hemminger | dea75bd | 2008-03-04 17:03:49 -0800 | [diff] [blame] | 812 | |
| 813 | /* server_ip and your_ip address are both already zero per RFC2131 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | b->hlen = dev->addr_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 815 | memcpy(b->hw_addr, dev->dev_addr, dev->addr_len); |
| 816 | b->secs = htons(jiffies_diff / HZ); |
| 817 | b->xid = d->xid; |
| 818 | |
| 819 | /* add DHCP options or BOOTP extensions */ |
| 820 | #ifdef IPCONFIG_DHCP |
| 821 | if (ic_proto_enabled & IC_USE_DHCP) |
| 822 | ic_dhcp_init_options(b->exten); |
| 823 | else |
| 824 | #endif |
| 825 | ic_bootp_init_ext(b->exten); |
| 826 | |
| 827 | /* Chain packet down the line... */ |
| 828 | skb->dev = dev; |
| 829 | skb->protocol = htons(ETH_P_IP); |
Stephen Hemminger | 0c4e858 | 2007-10-09 01:36:32 -0700 | [diff] [blame] | 830 | if (dev_hard_header(skb, dev, ntohs(skb->protocol), |
RongQing.Li | ad79eef | 2011-11-14 14:37:24 -0500 | [diff] [blame] | 831 | dev->broadcast, dev->dev_addr, skb->len) < 0) { |
| 832 | kfree_skb(skb); |
| 833 | printk("E"); |
| 834 | return; |
| 835 | } |
| 836 | |
| 837 | if (dev_queue_xmit(skb) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | printk("E"); |
| 839 | } |
| 840 | |
| 841 | |
| 842 | /* |
| 843 | * Copy BOOTP-supplied string if not already set. |
| 844 | */ |
| 845 | static int __init ic_bootp_string(char *dest, char *src, int len, int max) |
| 846 | { |
| 847 | if (!len) |
| 848 | return 0; |
| 849 | if (len > max-1) |
| 850 | len = max-1; |
| 851 | memcpy(dest, src, len); |
| 852 | dest[len] = '\0'; |
| 853 | return 1; |
| 854 | } |
| 855 | |
| 856 | |
| 857 | /* |
| 858 | * Process BOOTP extensions. |
| 859 | */ |
| 860 | static void __init ic_do_bootp_ext(u8 *ext) |
| 861 | { |
Eric Dumazet | 747465e | 2012-01-16 19:27:39 +0000 | [diff] [blame] | 862 | u8 servers; |
| 863 | int i; |
| 864 | __be16 mtu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | |
| 866 | #ifdef IPCONFIG_DEBUG |
| 867 | u8 *c; |
| 868 | |
| 869 | printk("DHCP/BOOTP: Got extension %d:",*ext); |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 870 | for (c=ext+2; c<ext+2+ext[1]; c++) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 871 | printk(" %02x", *c); |
| 872 | printk("\n"); |
| 873 | #endif |
| 874 | |
| 875 | switch (*ext++) { |
Joe Perches | 1d67a51 | 2011-07-01 09:43:05 +0000 | [diff] [blame] | 876 | case 1: /* Subnet mask */ |
| 877 | if (ic_netmask == NONE) |
| 878 | memcpy(&ic_netmask, ext+1, 4); |
| 879 | break; |
| 880 | case 3: /* Default gateway */ |
| 881 | if (ic_gateway == NONE) |
| 882 | memcpy(&ic_gateway, ext+1, 4); |
| 883 | break; |
| 884 | case 6: /* DNS server */ |
| 885 | servers= *ext/4; |
| 886 | if (servers > CONF_NAMESERVERS_MAX) |
| 887 | servers = CONF_NAMESERVERS_MAX; |
| 888 | for (i = 0; i < servers; i++) { |
| 889 | if (ic_nameservers[i] == NONE) |
| 890 | memcpy(&ic_nameservers[i], ext+1+4*i, 4); |
| 891 | } |
| 892 | break; |
| 893 | case 12: /* Host name */ |
| 894 | ic_bootp_string(utsname()->nodename, ext+1, *ext, |
| 895 | __NEW_UTS_LEN); |
| 896 | ic_host_name_set = 1; |
| 897 | break; |
| 898 | case 15: /* Domain name (DNS) */ |
| 899 | ic_bootp_string(ic_domain, ext+1, *ext, sizeof(ic_domain)); |
| 900 | break; |
| 901 | case 17: /* Root path */ |
| 902 | if (!root_server_path[0]) |
| 903 | ic_bootp_string(root_server_path, ext+1, *ext, |
| 904 | sizeof(root_server_path)); |
| 905 | break; |
| 906 | case 26: /* Interface MTU */ |
| 907 | memcpy(&mtu, ext+1, sizeof(mtu)); |
| 908 | ic_dev_mtu = ntohs(mtu); |
| 909 | break; |
| 910 | case 40: /* NIS Domain name (_not_ DNS) */ |
| 911 | ic_bootp_string(utsname()->domainname, ext+1, *ext, |
| 912 | __NEW_UTS_LEN); |
| 913 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | } |
| 915 | } |
| 916 | |
| 917 | |
| 918 | /* |
| 919 | * Receive BOOTP reply. |
| 920 | */ |
David S. Miller | f2ccd8f | 2005-08-09 19:34:12 -0700 | [diff] [blame] | 921 | static int __init ic_bootp_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 922 | { |
| 923 | struct bootp_pkt *b; |
| 924 | struct iphdr *h; |
| 925 | struct ic_device *d; |
| 926 | int len, ext_len; |
| 927 | |
YOSHIFUJI Hideaki | 721499e | 2008-07-19 22:34:43 -0700 | [diff] [blame] | 928 | if (!net_eq(dev_net(dev), &init_net)) |
Eric W. Biederman | e730c15 | 2007-09-17 11:53:39 -0700 | [diff] [blame] | 929 | goto drop; |
| 930 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | /* Perform verifications before taking the lock. */ |
| 932 | if (skb->pkt_type == PACKET_OTHERHOST) |
| 933 | goto drop; |
| 934 | |
| 935 | if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL) |
| 936 | return NET_RX_DROP; |
| 937 | |
| 938 | if (!pskb_may_pull(skb, |
| 939 | sizeof(struct iphdr) + |
| 940 | sizeof(struct udphdr))) |
| 941 | goto drop; |
| 942 | |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 943 | b = (struct bootp_pkt *)skb_network_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 944 | h = &b->iph; |
| 945 | |
| 946 | if (h->ihl != 5 || h->version != 4 || h->protocol != IPPROTO_UDP) |
| 947 | goto drop; |
| 948 | |
| 949 | /* Fragments are not supported */ |
Paul Gortmaker | 56f8a75 | 2011-06-21 20:33:34 -0700 | [diff] [blame] | 950 | if (ip_is_fragment(h)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 951 | if (net_ratelimit()) |
| 952 | printk(KERN_ERR "DHCP/BOOTP: Ignoring fragmented " |
| 953 | "reply.\n"); |
| 954 | goto drop; |
| 955 | } |
| 956 | |
| 957 | if (skb->len < ntohs(h->tot_len)) |
| 958 | goto drop; |
| 959 | |
| 960 | if (ip_fast_csum((char *) h, h->ihl)) |
| 961 | goto drop; |
| 962 | |
| 963 | if (b->udph.source != htons(67) || b->udph.dest != htons(68)) |
| 964 | goto drop; |
| 965 | |
| 966 | if (ntohs(h->tot_len) < ntohs(b->udph.len) + sizeof(struct iphdr)) |
| 967 | goto drop; |
| 968 | |
| 969 | len = ntohs(b->udph.len) - sizeof(struct udphdr); |
| 970 | ext_len = len - (sizeof(*b) - |
| 971 | sizeof(struct iphdr) - |
| 972 | sizeof(struct udphdr) - |
| 973 | sizeof(b->exten)); |
| 974 | if (ext_len < 0) |
| 975 | goto drop; |
| 976 | |
| 977 | /* Ok the front looks good, make sure we can get at the rest. */ |
| 978 | if (!pskb_may_pull(skb, skb->len)) |
| 979 | goto drop; |
| 980 | |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 981 | b = (struct bootp_pkt *)skb_network_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 982 | h = &b->iph; |
| 983 | |
| 984 | /* One reply at a time, please. */ |
| 985 | spin_lock(&ic_recv_lock); |
| 986 | |
| 987 | /* If we already have a reply, just drop the packet */ |
| 988 | if (ic_got_reply) |
| 989 | goto drop_unlock; |
| 990 | |
| 991 | /* Find the ic_device that the packet arrived on */ |
| 992 | d = ic_first_dev; |
| 993 | while (d && d->dev != dev) |
| 994 | d = d->next; |
| 995 | if (!d) |
| 996 | goto drop_unlock; /* should never happen */ |
| 997 | |
| 998 | /* Is it a reply to our BOOTP request? */ |
| 999 | if (b->op != BOOTP_REPLY || |
| 1000 | b->xid != d->xid) { |
| 1001 | if (net_ratelimit()) |
| 1002 | printk(KERN_ERR "DHCP/BOOTP: Reply not for us, " |
| 1003 | "op[%x] xid[%x]\n", |
| 1004 | b->op, b->xid); |
| 1005 | goto drop_unlock; |
| 1006 | } |
| 1007 | |
Chris Friesen | 2513dfb | 2009-05-17 20:39:33 -0700 | [diff] [blame] | 1008 | /* Is it a reply for the device we are configuring? */ |
| 1009 | if (b->xid != ic_dev_xid) { |
| 1010 | if (net_ratelimit()) |
Frans Pop | b138338 | 2010-03-24 07:57:28 +0000 | [diff] [blame] | 1011 | printk(KERN_ERR "DHCP/BOOTP: Ignoring delayed packet\n"); |
Chris Friesen | 2513dfb | 2009-05-17 20:39:33 -0700 | [diff] [blame] | 1012 | goto drop_unlock; |
| 1013 | } |
| 1014 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1015 | /* Parse extensions */ |
| 1016 | if (ext_len >= 4 && |
| 1017 | !memcmp(b->exten, ic_bootp_cookie, 4)) { /* Check magic cookie */ |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1018 | u8 *end = (u8 *) b + ntohs(b->iph.tot_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1019 | u8 *ext; |
| 1020 | |
| 1021 | #ifdef IPCONFIG_DHCP |
| 1022 | if (ic_proto_enabled & IC_USE_DHCP) { |
Al Viro | 5a874db | 2006-11-08 00:19:38 -0800 | [diff] [blame] | 1023 | __be32 server_id = NONE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1024 | int mt = 0; |
| 1025 | |
| 1026 | ext = &b->exten[4]; |
| 1027 | while (ext < end && *ext != 0xff) { |
| 1028 | u8 *opt = ext++; |
| 1029 | if (*opt == 0) /* Padding */ |
| 1030 | continue; |
| 1031 | ext += *ext + 1; |
| 1032 | if (ext >= end) |
| 1033 | break; |
| 1034 | switch (*opt) { |
| 1035 | case 53: /* Message type */ |
| 1036 | if (opt[1]) |
| 1037 | mt = opt[2]; |
| 1038 | break; |
| 1039 | case 54: /* Server ID (IP address) */ |
| 1040 | if (opt[1] >= 4) |
| 1041 | memcpy(&server_id, opt + 2, 4); |
| 1042 | break; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 1043 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1044 | } |
| 1045 | |
| 1046 | #ifdef IPCONFIG_DEBUG |
| 1047 | printk("DHCP: Got message type %d\n", mt); |
| 1048 | #endif |
| 1049 | |
| 1050 | switch (mt) { |
| 1051 | case DHCPOFFER: |
| 1052 | /* While in the process of accepting one offer, |
| 1053 | * ignore all others. |
| 1054 | */ |
Al Viro | 5a874db | 2006-11-08 00:19:38 -0800 | [diff] [blame] | 1055 | if (ic_myaddr != NONE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | goto drop_unlock; |
| 1057 | |
| 1058 | /* Let's accept that offer. */ |
| 1059 | ic_myaddr = b->your_ip; |
| 1060 | ic_servaddr = server_id; |
| 1061 | #ifdef IPCONFIG_DEBUG |
Harvey Harrison | 673d57e | 2008-10-31 00:53:57 -0700 | [diff] [blame] | 1062 | printk("DHCP: Offered address %pI4 by server %pI4\n", |
| 1063 | &ic_myaddr, &ic_servaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1064 | #endif |
| 1065 | /* The DHCP indicated server address takes |
| 1066 | * precedence over the bootp header one if |
| 1067 | * they are different. |
| 1068 | */ |
Al Viro | 5a874db | 2006-11-08 00:19:38 -0800 | [diff] [blame] | 1069 | if ((server_id != NONE) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1070 | (b->server_ip != server_id)) |
| 1071 | b->server_ip = ic_servaddr; |
| 1072 | break; |
| 1073 | |
| 1074 | case DHCPACK: |
| 1075 | if (memcmp(dev->dev_addr, b->hw_addr, dev->addr_len) != 0) |
| 1076 | goto drop_unlock; |
| 1077 | |
| 1078 | /* Yeah! */ |
| 1079 | break; |
| 1080 | |
| 1081 | default: |
| 1082 | /* Urque. Forget it*/ |
Al Viro | 5a874db | 2006-11-08 00:19:38 -0800 | [diff] [blame] | 1083 | ic_myaddr = NONE; |
| 1084 | ic_servaddr = NONE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1085 | goto drop_unlock; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 1086 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1087 | |
| 1088 | ic_dhcp_msgtype = mt; |
| 1089 | |
| 1090 | } |
| 1091 | #endif /* IPCONFIG_DHCP */ |
| 1092 | |
| 1093 | ext = &b->exten[4]; |
| 1094 | while (ext < end && *ext != 0xff) { |
| 1095 | u8 *opt = ext++; |
| 1096 | if (*opt == 0) /* Padding */ |
| 1097 | continue; |
| 1098 | ext += *ext + 1; |
| 1099 | if (ext < end) |
| 1100 | ic_do_bootp_ext(opt); |
| 1101 | } |
| 1102 | } |
| 1103 | |
| 1104 | /* We have a winner! */ |
| 1105 | ic_dev = dev; |
| 1106 | ic_myaddr = b->your_ip; |
| 1107 | ic_servaddr = b->server_ip; |
Al Viro | 5a874db | 2006-11-08 00:19:38 -0800 | [diff] [blame] | 1108 | if (ic_gateway == NONE && b->relay_ip) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1109 | ic_gateway = b->relay_ip; |
Al Viro | 5a874db | 2006-11-08 00:19:38 -0800 | [diff] [blame] | 1110 | if (ic_nameservers[0] == NONE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1111 | ic_nameservers[0] = ic_servaddr; |
| 1112 | ic_got_reply = IC_BOOTP; |
| 1113 | |
| 1114 | drop_unlock: |
| 1115 | /* Show's over. Nothing to see here. */ |
| 1116 | spin_unlock(&ic_recv_lock); |
| 1117 | |
| 1118 | drop: |
| 1119 | /* Throw the packet out. */ |
| 1120 | kfree_skb(skb); |
| 1121 | |
| 1122 | return 0; |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1123 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1124 | |
| 1125 | |
| 1126 | #endif |
| 1127 | |
| 1128 | |
| 1129 | /* |
| 1130 | * Dynamic IP configuration -- DHCP, BOOTP, RARP. |
| 1131 | */ |
| 1132 | |
| 1133 | #ifdef IPCONFIG_DYNAMIC |
| 1134 | |
| 1135 | static int __init ic_dynamic(void) |
| 1136 | { |
| 1137 | int retries; |
| 1138 | struct ic_device *d; |
| 1139 | unsigned long start_jiffies, timeout, jiff; |
| 1140 | int do_bootp = ic_proto_have_if & IC_BOOTP; |
| 1141 | int do_rarp = ic_proto_have_if & IC_RARP; |
| 1142 | |
| 1143 | /* |
| 1144 | * If none of DHCP/BOOTP/RARP was selected, return with an error. |
| 1145 | * This routine gets only called when some pieces of information |
| 1146 | * are missing, and without DHCP/BOOTP/RARP we are unable to get it. |
| 1147 | */ |
| 1148 | if (!ic_proto_enabled) { |
| 1149 | printk(KERN_ERR "IP-Config: Incomplete network configuration information.\n"); |
| 1150 | return -1; |
| 1151 | } |
| 1152 | |
| 1153 | #ifdef IPCONFIG_BOOTP |
| 1154 | if ((ic_proto_enabled ^ ic_proto_have_if) & IC_BOOTP) |
| 1155 | printk(KERN_ERR "DHCP/BOOTP: No suitable device found.\n"); |
| 1156 | #endif |
| 1157 | #ifdef IPCONFIG_RARP |
| 1158 | if ((ic_proto_enabled ^ ic_proto_have_if) & IC_RARP) |
| 1159 | printk(KERN_ERR "RARP: No suitable device found.\n"); |
| 1160 | #endif |
| 1161 | |
| 1162 | if (!ic_proto_have_if) |
| 1163 | /* Error message already printed */ |
| 1164 | return -1; |
| 1165 | |
| 1166 | /* |
| 1167 | * Setup protocols |
| 1168 | */ |
| 1169 | #ifdef IPCONFIG_BOOTP |
| 1170 | if (do_bootp) |
| 1171 | ic_bootp_init(); |
| 1172 | #endif |
| 1173 | #ifdef IPCONFIG_RARP |
| 1174 | if (do_rarp) |
| 1175 | ic_rarp_init(); |
| 1176 | #endif |
| 1177 | |
| 1178 | /* |
| 1179 | * Send requests and wait, until we get an answer. This loop |
| 1180 | * seems to be a terrible waste of CPU time, but actually there is |
| 1181 | * only one process running at all, so we don't need to use any |
| 1182 | * scheduler functions. |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1183 | * [Actually we could now, but the nothing else running note still |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1184 | * applies.. - AC] |
| 1185 | */ |
| 1186 | printk(KERN_NOTICE "Sending %s%s%s requests .", |
| 1187 | do_bootp |
| 1188 | ? ((ic_proto_enabled & IC_USE_DHCP) ? "DHCP" : "BOOTP") : "", |
| 1189 | (do_bootp && do_rarp) ? " and " : "", |
| 1190 | do_rarp ? "RARP" : ""); |
| 1191 | |
| 1192 | start_jiffies = jiffies; |
| 1193 | d = ic_first_dev; |
| 1194 | retries = CONF_SEND_RETRIES; |
| 1195 | get_random_bytes(&timeout, sizeof(timeout)); |
| 1196 | timeout = CONF_BASE_TIMEOUT + (timeout % (unsigned) CONF_TIMEOUT_RANDOM); |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1197 | for (;;) { |
Chris Friesen | 2513dfb | 2009-05-17 20:39:33 -0700 | [diff] [blame] | 1198 | /* Track the device we are configuring */ |
| 1199 | ic_dev_xid = d->xid; |
| 1200 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1201 | #ifdef IPCONFIG_BOOTP |
| 1202 | if (do_bootp && (d->able & IC_BOOTP)) |
| 1203 | ic_bootp_send_if(d, jiffies - start_jiffies); |
| 1204 | #endif |
| 1205 | #ifdef IPCONFIG_RARP |
| 1206 | if (do_rarp && (d->able & IC_RARP)) |
| 1207 | ic_rarp_send_if(d); |
| 1208 | #endif |
| 1209 | |
| 1210 | jiff = jiffies + (d->next ? CONF_INTER_TIMEOUT : timeout); |
Nishanth Aravamudan | 121caf5 | 2005-09-12 14:15:34 -0700 | [diff] [blame] | 1211 | while (time_before(jiffies, jiff) && !ic_got_reply) |
| 1212 | schedule_timeout_uninterruptible(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1213 | #ifdef IPCONFIG_DHCP |
| 1214 | /* DHCP isn't done until we get a DHCPACK. */ |
Joe Perches | 9d4fb27 | 2009-11-23 10:41:23 -0800 | [diff] [blame] | 1215 | if ((ic_got_reply & IC_BOOTP) && |
| 1216 | (ic_proto_enabled & IC_USE_DHCP) && |
| 1217 | ic_dhcp_msgtype != DHCPACK) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1218 | ic_got_reply = 0; |
Uwe Kleine-König | a40c9f8 | 2010-11-23 22:57:47 +0000 | [diff] [blame] | 1219 | printk(KERN_CONT ","); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1220 | continue; |
| 1221 | } |
| 1222 | #endif /* IPCONFIG_DHCP */ |
| 1223 | |
| 1224 | if (ic_got_reply) { |
Uwe Kleine-König | a40c9f8 | 2010-11-23 22:57:47 +0000 | [diff] [blame] | 1225 | printk(KERN_CONT " OK\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1226 | break; |
| 1227 | } |
| 1228 | |
| 1229 | if ((d = d->next)) |
| 1230 | continue; |
| 1231 | |
| 1232 | if (! --retries) { |
Uwe Kleine-König | a40c9f8 | 2010-11-23 22:57:47 +0000 | [diff] [blame] | 1233 | printk(KERN_CONT " timed out!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1234 | break; |
| 1235 | } |
| 1236 | |
| 1237 | d = ic_first_dev; |
| 1238 | |
| 1239 | timeout = timeout CONF_TIMEOUT_MULT; |
| 1240 | if (timeout > CONF_TIMEOUT_MAX) |
| 1241 | timeout = CONF_TIMEOUT_MAX; |
| 1242 | |
Uwe Kleine-König | a40c9f8 | 2010-11-23 22:57:47 +0000 | [diff] [blame] | 1243 | printk(KERN_CONT "."); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1244 | } |
| 1245 | |
| 1246 | #ifdef IPCONFIG_BOOTP |
| 1247 | if (do_bootp) |
| 1248 | ic_bootp_cleanup(); |
| 1249 | #endif |
| 1250 | #ifdef IPCONFIG_RARP |
| 1251 | if (do_rarp) |
| 1252 | ic_rarp_cleanup(); |
| 1253 | #endif |
| 1254 | |
Maxime Bizon | 7a1af5d | 2005-06-28 13:21:12 -0700 | [diff] [blame] | 1255 | if (!ic_got_reply) { |
Al Viro | 5a874db | 2006-11-08 00:19:38 -0800 | [diff] [blame] | 1256 | ic_myaddr = NONE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1257 | return -1; |
Maxime Bizon | 7a1af5d | 2005-06-28 13:21:12 -0700 | [diff] [blame] | 1258 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1259 | |
Harvey Harrison | 673d57e | 2008-10-31 00:53:57 -0700 | [diff] [blame] | 1260 | printk("IP-Config: Got %s answer from %pI4, ", |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1261 | ((ic_got_reply & IC_RARP) ? "RARP" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1262 | : (ic_proto_enabled & IC_USE_DHCP) ? "DHCP" : "BOOTP"), |
Harvey Harrison | 673d57e | 2008-10-31 00:53:57 -0700 | [diff] [blame] | 1263 | &ic_servaddr); |
Uwe Kleine-König | a40c9f8 | 2010-11-23 22:57:47 +0000 | [diff] [blame] | 1264 | printk(KERN_CONT "my address is %pI4\n", &ic_myaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1265 | |
| 1266 | return 0; |
| 1267 | } |
| 1268 | |
| 1269 | #endif /* IPCONFIG_DYNAMIC */ |
| 1270 | |
| 1271 | #ifdef CONFIG_PROC_FS |
| 1272 | |
| 1273 | static int pnp_seq_show(struct seq_file *seq, void *v) |
| 1274 | { |
| 1275 | int i; |
| 1276 | |
| 1277 | if (ic_proto_used & IC_PROTO) |
| 1278 | seq_printf(seq, "#PROTO: %s\n", |
| 1279 | (ic_proto_used & IC_RARP) ? "RARP" |
| 1280 | : (ic_proto_used & IC_USE_DHCP) ? "DHCP" : "BOOTP"); |
| 1281 | else |
| 1282 | seq_puts(seq, "#MANUAL\n"); |
| 1283 | |
| 1284 | if (ic_domain[0]) |
| 1285 | seq_printf(seq, |
| 1286 | "domain %s\n", ic_domain); |
| 1287 | for (i = 0; i < CONF_NAMESERVERS_MAX; i++) { |
Al Viro | 5a874db | 2006-11-08 00:19:38 -0800 | [diff] [blame] | 1288 | if (ic_nameservers[i] != NONE) |
Harvey Harrison | 673d57e | 2008-10-31 00:53:57 -0700 | [diff] [blame] | 1289 | seq_printf(seq, "nameserver %pI4\n", |
| 1290 | &ic_nameservers[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1291 | } |
Al Viro | 5a874db | 2006-11-08 00:19:38 -0800 | [diff] [blame] | 1292 | if (ic_servaddr != NONE) |
Harvey Harrison | 673d57e | 2008-10-31 00:53:57 -0700 | [diff] [blame] | 1293 | seq_printf(seq, "bootserver %pI4\n", |
| 1294 | &ic_servaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1295 | return 0; |
| 1296 | } |
| 1297 | |
| 1298 | static int pnp_seq_open(struct inode *indoe, struct file *file) |
| 1299 | { |
| 1300 | return single_open(file, pnp_seq_show, NULL); |
| 1301 | } |
| 1302 | |
Arjan van de Ven | 9a32144 | 2007-02-12 00:55:35 -0800 | [diff] [blame] | 1303 | static const struct file_operations pnp_seq_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | .owner = THIS_MODULE, |
| 1305 | .open = pnp_seq_open, |
| 1306 | .read = seq_read, |
| 1307 | .llseek = seq_lseek, |
| 1308 | .release = single_release, |
| 1309 | }; |
| 1310 | #endif /* CONFIG_PROC_FS */ |
| 1311 | |
| 1312 | /* |
| 1313 | * Extract IP address from the parameter string if needed. Note that we |
| 1314 | * need to have root_server_addr set _before_ IPConfig gets called as it |
| 1315 | * can override it. |
| 1316 | */ |
Al Viro | 5a874db | 2006-11-08 00:19:38 -0800 | [diff] [blame] | 1317 | __be32 __init root_nfs_parse_addr(char *name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1318 | { |
Al Viro | 5a874db | 2006-11-08 00:19:38 -0800 | [diff] [blame] | 1319 | __be32 addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1320 | int octets = 0; |
| 1321 | char *cp, *cq; |
| 1322 | |
| 1323 | cp = cq = name; |
| 1324 | while (octets < 4) { |
| 1325 | while (*cp >= '0' && *cp <= '9') |
| 1326 | cp++; |
| 1327 | if (cp == cq || cp - cq > 3) |
| 1328 | break; |
| 1329 | if (*cp == '.' || octets == 3) |
| 1330 | octets++; |
| 1331 | if (octets < 4) |
| 1332 | cp++; |
| 1333 | cq = cp; |
| 1334 | } |
| 1335 | if (octets == 4 && (*cp == ':' || *cp == '\0')) { |
| 1336 | if (*cp == ':') |
| 1337 | *cp++ = '\0'; |
| 1338 | addr = in_aton(name); |
| 1339 | memmove(name, cp, strlen(cp) + 1); |
| 1340 | } else |
Al Viro | 5a874db | 2006-11-08 00:19:38 -0800 | [diff] [blame] | 1341 | addr = NONE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1342 | |
| 1343 | return addr; |
| 1344 | } |
| 1345 | |
David S. Miller | 964ad81 | 2010-03-12 00:00:17 -0800 | [diff] [blame] | 1346 | #define DEVICE_WAIT_MAX 12 /* 12 seconds */ |
| 1347 | |
| 1348 | static int __init wait_for_devices(void) |
| 1349 | { |
| 1350 | int i; |
| 1351 | |
David S. Miller | 964ad81 | 2010-03-12 00:00:17 -0800 | [diff] [blame] | 1352 | for (i = 0; i < DEVICE_WAIT_MAX; i++) { |
| 1353 | struct net_device *dev; |
| 1354 | int found = 0; |
| 1355 | |
| 1356 | rtnl_lock(); |
| 1357 | for_each_netdev(&init_net, dev) { |
Micha Nelissen | 3fb72f1 | 2011-05-19 10:14:06 +0000 | [diff] [blame] | 1358 | if (ic_is_init_dev(dev)) { |
David S. Miller | 964ad81 | 2010-03-12 00:00:17 -0800 | [diff] [blame] | 1359 | found = 1; |
| 1360 | break; |
| 1361 | } |
| 1362 | } |
| 1363 | rtnl_unlock(); |
| 1364 | if (found) |
| 1365 | return 0; |
| 1366 | ssleep(1); |
| 1367 | } |
| 1368 | return -ENODEV; |
| 1369 | } |
| 1370 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1371 | /* |
| 1372 | * IP Autoconfig dispatcher. |
| 1373 | */ |
| 1374 | |
| 1375 | static int __init ip_auto_config(void) |
| 1376 | { |
Al Viro | 5a874db | 2006-11-08 00:19:38 -0800 | [diff] [blame] | 1377 | __be32 addr; |
Benjamin Zores | 9d8dba6 | 2009-01-29 16:19:13 -0800 | [diff] [blame] | 1378 | #ifdef IPCONFIG_DYNAMIC |
| 1379 | int retries = CONF_OPEN_RETRIES; |
| 1380 | #endif |
David S. Miller | 964ad81 | 2010-03-12 00:00:17 -0800 | [diff] [blame] | 1381 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1382 | |
| 1383 | #ifdef CONFIG_PROC_FS |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 1384 | proc_net_fops_create(&init_net, "pnp", S_IRUGO, &pnp_seq_fops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1385 | #endif /* CONFIG_PROC_FS */ |
| 1386 | |
| 1387 | if (!ic_enable) |
| 1388 | return 0; |
| 1389 | |
| 1390 | DBG(("IP-Config: Entered.\n")); |
| 1391 | #ifdef IPCONFIG_DYNAMIC |
| 1392 | try_try_again: |
| 1393 | #endif |
David S. Miller | 964ad81 | 2010-03-12 00:00:17 -0800 | [diff] [blame] | 1394 | /* Wait for devices to appear */ |
| 1395 | err = wait_for_devices(); |
| 1396 | if (err) |
| 1397 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1398 | |
| 1399 | /* Setup all network devices */ |
David S. Miller | 964ad81 | 2010-03-12 00:00:17 -0800 | [diff] [blame] | 1400 | err = ic_open_devs(); |
| 1401 | if (err) |
| 1402 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1403 | |
| 1404 | /* Give drivers a chance to settle */ |
Micha Nelissen | 3fb72f1 | 2011-05-19 10:14:06 +0000 | [diff] [blame] | 1405 | msleep(CONF_POST_OPEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1406 | |
| 1407 | /* |
| 1408 | * If the config information is insufficient (e.g., our IP address or |
| 1409 | * IP address of the boot server is missing or we have multiple network |
| 1410 | * interfaces and no default was set), use BOOTP or RARP to get the |
| 1411 | * missing values. |
| 1412 | */ |
Al Viro | 5a874db | 2006-11-08 00:19:38 -0800 | [diff] [blame] | 1413 | if (ic_myaddr == NONE || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1414 | #ifdef CONFIG_ROOT_NFS |
Joe Perches | 9d4fb27 | 2009-11-23 10:41:23 -0800 | [diff] [blame] | 1415 | (root_server_addr == NONE && |
| 1416 | ic_servaddr == NONE && |
| 1417 | ROOT_DEV == Root_NFS) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1418 | #endif |
| 1419 | ic_first_dev->next) { |
| 1420 | #ifdef IPCONFIG_DYNAMIC |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1421 | if (ic_dynamic() < 0) { |
| 1422 | ic_close_devs(); |
| 1423 | |
| 1424 | /* |
| 1425 | * I don't know why, but sometimes the |
| 1426 | * eepro100 driver (at least) gets upset and |
| 1427 | * doesn't work the first time it's opened. |
| 1428 | * But then if you close it and reopen it, it |
| 1429 | * works just fine. So we need to try that at |
| 1430 | * least once before giving up. |
| 1431 | * |
| 1432 | * Also, if the root will be NFS-mounted, we |
| 1433 | * have nowhere to go if DHCP fails. So we |
| 1434 | * just have to keep trying forever. |
| 1435 | * |
| 1436 | * -- Chip |
| 1437 | */ |
| 1438 | #ifdef CONFIG_ROOT_NFS |
| 1439 | if (ROOT_DEV == Root_NFS) { |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1440 | printk(KERN_ERR |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1441 | "IP-Config: Retrying forever (NFS root)...\n"); |
| 1442 | goto try_try_again; |
| 1443 | } |
| 1444 | #endif |
| 1445 | |
| 1446 | if (--retries) { |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1447 | printk(KERN_ERR |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1448 | "IP-Config: Reopening network devices...\n"); |
| 1449 | goto try_try_again; |
| 1450 | } |
| 1451 | |
| 1452 | /* Oh, well. At least we tried. */ |
| 1453 | printk(KERN_ERR "IP-Config: Auto-configuration of network failed.\n"); |
| 1454 | return -1; |
| 1455 | } |
| 1456 | #else /* !DYNAMIC */ |
| 1457 | printk(KERN_ERR "IP-Config: Incomplete network configuration information.\n"); |
| 1458 | ic_close_devs(); |
| 1459 | return -1; |
| 1460 | #endif /* IPCONFIG_DYNAMIC */ |
| 1461 | } else { |
| 1462 | /* Device selected manually or only one device -> use it */ |
| 1463 | ic_dev = ic_first_dev->dev; |
| 1464 | } |
| 1465 | |
| 1466 | addr = root_nfs_parse_addr(root_server_path); |
Al Viro | 5a874db | 2006-11-08 00:19:38 -0800 | [diff] [blame] | 1467 | if (root_server_addr == NONE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1468 | root_server_addr = addr; |
| 1469 | |
| 1470 | /* |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1471 | * Use defaults wherever applicable. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1472 | */ |
| 1473 | if (ic_defaults() < 0) |
| 1474 | return -1; |
| 1475 | |
| 1476 | /* |
| 1477 | * Close all network devices except the device we've |
| 1478 | * autoconfigured and set up routes. |
| 1479 | */ |
| 1480 | ic_close_devs(); |
| 1481 | if (ic_setup_if() < 0 || ic_setup_routes() < 0) |
| 1482 | return -1; |
| 1483 | |
| 1484 | /* |
| 1485 | * Record which protocol was actually used. |
| 1486 | */ |
| 1487 | #ifdef IPCONFIG_DYNAMIC |
| 1488 | ic_proto_used = ic_got_reply | (ic_proto_enabled & IC_USE_DHCP); |
| 1489 | #endif |
| 1490 | |
| 1491 | #ifndef IPCONFIG_SILENT |
| 1492 | /* |
| 1493 | * Clue in the operator. |
| 1494 | */ |
Uwe Kleine-König | a40c9f8 | 2010-11-23 22:57:47 +0000 | [diff] [blame] | 1495 | printk("IP-Config: Complete:\n"); |
| 1496 | printk(" device=%s", ic_dev->name); |
| 1497 | printk(KERN_CONT ", addr=%pI4", &ic_myaddr); |
| 1498 | printk(KERN_CONT ", mask=%pI4", &ic_netmask); |
| 1499 | printk(KERN_CONT ", gw=%pI4", &ic_gateway); |
| 1500 | printk(KERN_CONT ",\n host=%s, domain=%s, nis-domain=%s", |
Serge E. Hallyn | e9ff399 | 2006-10-02 02:18:11 -0700 | [diff] [blame] | 1501 | utsname()->nodename, ic_domain, utsname()->domainname); |
Uwe Kleine-König | a40c9f8 | 2010-11-23 22:57:47 +0000 | [diff] [blame] | 1502 | printk(KERN_CONT ",\n bootserver=%pI4", &ic_servaddr); |
| 1503 | printk(KERN_CONT ", rootserver=%pI4", &root_server_addr); |
| 1504 | printk(KERN_CONT ", rootpath=%s", root_server_path); |
Chris Friesen | 9643f45 | 2009-05-19 15:31:50 -0700 | [diff] [blame] | 1505 | if (ic_dev_mtu) |
Uwe Kleine-König | a40c9f8 | 2010-11-23 22:57:47 +0000 | [diff] [blame] | 1506 | printk(KERN_CONT ", mtu=%d", ic_dev_mtu); |
| 1507 | printk(KERN_CONT "\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1508 | #endif /* !SILENT */ |
| 1509 | |
| 1510 | return 0; |
| 1511 | } |
| 1512 | |
| 1513 | late_initcall(ip_auto_config); |
| 1514 | |
| 1515 | |
| 1516 | /* |
| 1517 | * Decode any IP configuration options in the "ip=" or "nfsaddrs=" kernel |
J. Bruce Fields | dc7a081 | 2009-10-27 14:41:35 -0400 | [diff] [blame] | 1518 | * command line parameter. See Documentation/filesystems/nfs/nfsroot.txt. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1519 | */ |
| 1520 | static int __init ic_proto_name(char *name) |
| 1521 | { |
| 1522 | if (!strcmp(name, "on") || !strcmp(name, "any")) { |
| 1523 | return 1; |
| 1524 | } |
Simon Horman | a6c05c3 | 2007-12-25 20:54:42 -0800 | [diff] [blame] | 1525 | if (!strcmp(name, "off") || !strcmp(name, "none")) { |
Amos Waterland | 92ffb85 | 2008-01-05 23:23:06 -0800 | [diff] [blame] | 1526 | return 0; |
Simon Horman | a6c05c3 | 2007-12-25 20:54:42 -0800 | [diff] [blame] | 1527 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1528 | #ifdef CONFIG_IP_PNP_DHCP |
| 1529 | else if (!strcmp(name, "dhcp")) { |
| 1530 | ic_proto_enabled &= ~IC_RARP; |
| 1531 | return 1; |
| 1532 | } |
| 1533 | #endif |
| 1534 | #ifdef CONFIG_IP_PNP_BOOTP |
| 1535 | else if (!strcmp(name, "bootp")) { |
| 1536 | ic_proto_enabled &= ~(IC_RARP | IC_USE_DHCP); |
| 1537 | return 1; |
| 1538 | } |
| 1539 | #endif |
| 1540 | #ifdef CONFIG_IP_PNP_RARP |
| 1541 | else if (!strcmp(name, "rarp")) { |
| 1542 | ic_proto_enabled &= ~(IC_BOOTP | IC_USE_DHCP); |
| 1543 | return 1; |
| 1544 | } |
| 1545 | #endif |
| 1546 | #ifdef IPCONFIG_DYNAMIC |
| 1547 | else if (!strcmp(name, "both")) { |
| 1548 | ic_proto_enabled &= ~IC_USE_DHCP; /* backward compat :-( */ |
| 1549 | return 1; |
| 1550 | } |
| 1551 | #endif |
| 1552 | return 0; |
| 1553 | } |
| 1554 | |
| 1555 | static int __init ip_auto_config_setup(char *addrs) |
| 1556 | { |
| 1557 | char *cp, *ip, *dp; |
| 1558 | int num = 0; |
| 1559 | |
| 1560 | ic_set_manually = 1; |
Simon Horman | 9cecd07 | 2007-12-27 21:19:10 -0800 | [diff] [blame] | 1561 | ic_enable = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1562 | |
Amos Waterland | 92ffb85 | 2008-01-05 23:23:06 -0800 | [diff] [blame] | 1563 | /* |
| 1564 | * If any dhcp, bootp etc options are set, leave autoconfig on |
| 1565 | * and skip the below static IP processing. |
| 1566 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1567 | if (ic_proto_name(addrs)) |
| 1568 | return 1; |
| 1569 | |
Amos Waterland | 92ffb85 | 2008-01-05 23:23:06 -0800 | [diff] [blame] | 1570 | /* If no static IP is given, turn off autoconfig and bail. */ |
| 1571 | if (*addrs == 0 || |
| 1572 | strcmp(addrs, "off") == 0 || |
| 1573 | strcmp(addrs, "none") == 0) { |
| 1574 | ic_enable = 0; |
| 1575 | return 1; |
| 1576 | } |
| 1577 | |
| 1578 | /* Parse string for static IP assignment. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1579 | ip = addrs; |
| 1580 | while (ip && *ip) { |
| 1581 | if ((cp = strchr(ip, ':'))) |
| 1582 | *cp++ = '\0'; |
| 1583 | if (strlen(ip) > 0) { |
| 1584 | DBG(("IP-Config: Parameter #%d: `%s'\n", num, ip)); |
| 1585 | switch (num) { |
| 1586 | case 0: |
Al Viro | e6f1ceb | 2008-03-17 22:44:53 -0700 | [diff] [blame] | 1587 | if ((ic_myaddr = in_aton(ip)) == ANY) |
Al Viro | 5a874db | 2006-11-08 00:19:38 -0800 | [diff] [blame] | 1588 | ic_myaddr = NONE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1589 | break; |
| 1590 | case 1: |
Al Viro | e6f1ceb | 2008-03-17 22:44:53 -0700 | [diff] [blame] | 1591 | if ((ic_servaddr = in_aton(ip)) == ANY) |
Al Viro | 5a874db | 2006-11-08 00:19:38 -0800 | [diff] [blame] | 1592 | ic_servaddr = NONE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1593 | break; |
| 1594 | case 2: |
Al Viro | e6f1ceb | 2008-03-17 22:44:53 -0700 | [diff] [blame] | 1595 | if ((ic_gateway = in_aton(ip)) == ANY) |
Al Viro | 5a874db | 2006-11-08 00:19:38 -0800 | [diff] [blame] | 1596 | ic_gateway = NONE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1597 | break; |
| 1598 | case 3: |
Al Viro | e6f1ceb | 2008-03-17 22:44:53 -0700 | [diff] [blame] | 1599 | if ((ic_netmask = in_aton(ip)) == ANY) |
Al Viro | 5a874db | 2006-11-08 00:19:38 -0800 | [diff] [blame] | 1600 | ic_netmask = NONE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1601 | break; |
| 1602 | case 4: |
| 1603 | if ((dp = strchr(ip, '.'))) { |
| 1604 | *dp++ = '\0'; |
Serge E. Hallyn | e9ff399 | 2006-10-02 02:18:11 -0700 | [diff] [blame] | 1605 | strlcpy(utsname()->domainname, dp, |
| 1606 | sizeof(utsname()->domainname)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1607 | } |
Serge E. Hallyn | e9ff399 | 2006-10-02 02:18:11 -0700 | [diff] [blame] | 1608 | strlcpy(utsname()->nodename, ip, |
| 1609 | sizeof(utsname()->nodename)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1610 | ic_host_name_set = 1; |
| 1611 | break; |
| 1612 | case 5: |
| 1613 | strlcpy(user_dev_name, ip, sizeof(user_dev_name)); |
| 1614 | break; |
| 1615 | case 6: |
Amos Waterland | 92ffb85 | 2008-01-05 23:23:06 -0800 | [diff] [blame] | 1616 | if (ic_proto_name(ip) == 0 && |
| 1617 | ic_myaddr == NONE) { |
| 1618 | ic_enable = 0; |
| 1619 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1620 | break; |
| 1621 | } |
| 1622 | } |
| 1623 | ip = cp; |
| 1624 | num++; |
| 1625 | } |
| 1626 | |
| 1627 | return 1; |
| 1628 | } |
| 1629 | |
| 1630 | static int __init nfsaddrs_config_setup(char *addrs) |
| 1631 | { |
| 1632 | return ip_auto_config_setup(addrs); |
| 1633 | } |
| 1634 | |
Rainer Jochem | 62013db | 2007-11-14 02:18:39 -0800 | [diff] [blame] | 1635 | static int __init vendor_class_identifier_setup(char *addrs) |
| 1636 | { |
| 1637 | if (strlcpy(vendor_class_identifier, addrs, |
| 1638 | sizeof(vendor_class_identifier)) |
| 1639 | >= sizeof(vendor_class_identifier)) |
| 1640 | printk(KERN_WARNING "DHCP: vendorclass too long, truncated to \"%s\"", |
| 1641 | vendor_class_identifier); |
| 1642 | return 1; |
| 1643 | } |
| 1644 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1645 | __setup("ip=", ip_auto_config_setup); |
| 1646 | __setup("nfsaddrs=", nfsaddrs_config_setup); |
Rainer Jochem | 62013db | 2007-11-14 02:18:39 -0800 | [diff] [blame] | 1647 | __setup("dhcpclass=", vendor_class_identifier_setup); |