Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * INET An implementation of the TCP/IP protocol suite for the LINUX |
| 3 | * operating system. INET is implemented using the BSD Socket |
| 4 | * interface as the means of communication with the user level. |
| 5 | * |
| 6 | * The IP to API glue. |
| 7 | * |
| 8 | * Version: $Id: ip_sockglue.c,v 1.62 2002/02/01 22:01:04 davem Exp $ |
| 9 | * |
| 10 | * Authors: see ip.c |
| 11 | * |
| 12 | * Fixes: |
| 13 | * Many : Split from ip.c , see ip.c for history. |
| 14 | * Martin Mares : TOS setting fixed. |
| 15 | * Alan Cox : Fixed a couple of oopses in Martin's |
| 16 | * TOS tweaks. |
| 17 | * Mike McLagan : Routing by source |
| 18 | */ |
| 19 | |
| 20 | #include <linux/config.h> |
| 21 | #include <linux/module.h> |
| 22 | #include <linux/types.h> |
| 23 | #include <linux/mm.h> |
| 24 | #include <linux/sched.h> |
| 25 | #include <linux/skbuff.h> |
| 26 | #include <linux/ip.h> |
| 27 | #include <linux/icmp.h> |
| 28 | #include <linux/netdevice.h> |
| 29 | #include <net/sock.h> |
| 30 | #include <net/ip.h> |
| 31 | #include <net/icmp.h> |
| 32 | #include <net/tcp.h> |
| 33 | #include <linux/tcp.h> |
| 34 | #include <linux/udp.h> |
| 35 | #include <linux/igmp.h> |
| 36 | #include <linux/netfilter.h> |
| 37 | #include <linux/route.h> |
| 38 | #include <linux/mroute.h> |
| 39 | #include <net/route.h> |
| 40 | #include <net/xfrm.h> |
| 41 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
| 42 | #include <net/transp_v6.h> |
| 43 | #endif |
| 44 | |
| 45 | #include <linux/errqueue.h> |
| 46 | #include <asm/uaccess.h> |
| 47 | |
| 48 | #define IP_CMSG_PKTINFO 1 |
| 49 | #define IP_CMSG_TTL 2 |
| 50 | #define IP_CMSG_TOS 4 |
| 51 | #define IP_CMSG_RECVOPTS 8 |
| 52 | #define IP_CMSG_RETOPTS 16 |
| 53 | |
| 54 | /* |
| 55 | * SOL_IP control messages. |
| 56 | */ |
| 57 | |
| 58 | static void ip_cmsg_recv_pktinfo(struct msghdr *msg, struct sk_buff *skb) |
| 59 | { |
| 60 | struct in_pktinfo info; |
| 61 | struct rtable *rt = (struct rtable *)skb->dst; |
| 62 | |
| 63 | info.ipi_addr.s_addr = skb->nh.iph->daddr; |
| 64 | if (rt) { |
| 65 | info.ipi_ifindex = rt->rt_iif; |
| 66 | info.ipi_spec_dst.s_addr = rt->rt_spec_dst; |
| 67 | } else { |
| 68 | info.ipi_ifindex = 0; |
| 69 | info.ipi_spec_dst.s_addr = 0; |
| 70 | } |
| 71 | |
| 72 | put_cmsg(msg, SOL_IP, IP_PKTINFO, sizeof(info), &info); |
| 73 | } |
| 74 | |
| 75 | static void ip_cmsg_recv_ttl(struct msghdr *msg, struct sk_buff *skb) |
| 76 | { |
| 77 | int ttl = skb->nh.iph->ttl; |
| 78 | put_cmsg(msg, SOL_IP, IP_TTL, sizeof(int), &ttl); |
| 79 | } |
| 80 | |
| 81 | static void ip_cmsg_recv_tos(struct msghdr *msg, struct sk_buff *skb) |
| 82 | { |
| 83 | put_cmsg(msg, SOL_IP, IP_TOS, 1, &skb->nh.iph->tos); |
| 84 | } |
| 85 | |
| 86 | static void ip_cmsg_recv_opts(struct msghdr *msg, struct sk_buff *skb) |
| 87 | { |
| 88 | if (IPCB(skb)->opt.optlen == 0) |
| 89 | return; |
| 90 | |
| 91 | put_cmsg(msg, SOL_IP, IP_RECVOPTS, IPCB(skb)->opt.optlen, skb->nh.iph+1); |
| 92 | } |
| 93 | |
| 94 | |
| 95 | static void ip_cmsg_recv_retopts(struct msghdr *msg, struct sk_buff *skb) |
| 96 | { |
| 97 | unsigned char optbuf[sizeof(struct ip_options) + 40]; |
| 98 | struct ip_options * opt = (struct ip_options*)optbuf; |
| 99 | |
| 100 | if (IPCB(skb)->opt.optlen == 0) |
| 101 | return; |
| 102 | |
| 103 | if (ip_options_echo(opt, skb)) { |
| 104 | msg->msg_flags |= MSG_CTRUNC; |
| 105 | return; |
| 106 | } |
| 107 | ip_options_undo(opt); |
| 108 | |
| 109 | put_cmsg(msg, SOL_IP, IP_RETOPTS, opt->optlen, opt->__data); |
| 110 | } |
| 111 | |
| 112 | |
| 113 | void ip_cmsg_recv(struct msghdr *msg, struct sk_buff *skb) |
| 114 | { |
| 115 | struct inet_sock *inet = inet_sk(skb->sk); |
| 116 | unsigned flags = inet->cmsg_flags; |
| 117 | |
| 118 | /* Ordered by supposed usage frequency */ |
| 119 | if (flags & 1) |
| 120 | ip_cmsg_recv_pktinfo(msg, skb); |
| 121 | if ((flags>>=1) == 0) |
| 122 | return; |
| 123 | |
| 124 | if (flags & 1) |
| 125 | ip_cmsg_recv_ttl(msg, skb); |
| 126 | if ((flags>>=1) == 0) |
| 127 | return; |
| 128 | |
| 129 | if (flags & 1) |
| 130 | ip_cmsg_recv_tos(msg, skb); |
| 131 | if ((flags>>=1) == 0) |
| 132 | return; |
| 133 | |
| 134 | if (flags & 1) |
| 135 | ip_cmsg_recv_opts(msg, skb); |
| 136 | if ((flags>>=1) == 0) |
| 137 | return; |
| 138 | |
| 139 | if (flags & 1) |
| 140 | ip_cmsg_recv_retopts(msg, skb); |
| 141 | } |
| 142 | |
| 143 | int ip_cmsg_send(struct msghdr *msg, struct ipcm_cookie *ipc) |
| 144 | { |
| 145 | int err; |
| 146 | struct cmsghdr *cmsg; |
| 147 | |
| 148 | for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) { |
| 149 | if (!CMSG_OK(msg, cmsg)) |
| 150 | return -EINVAL; |
| 151 | if (cmsg->cmsg_level != SOL_IP) |
| 152 | continue; |
| 153 | switch (cmsg->cmsg_type) { |
| 154 | case IP_RETOPTS: |
| 155 | err = cmsg->cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr)); |
Arnaldo Carvalho de Melo | 4c6ea29 | 2005-08-16 19:46:48 -0300 | [diff] [blame] | 156 | err = ip_options_get(&ipc->opt, CMSG_DATA(cmsg), err < 40 ? err : 40); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | if (err) |
| 158 | return err; |
| 159 | break; |
| 160 | case IP_PKTINFO: |
| 161 | { |
| 162 | struct in_pktinfo *info; |
| 163 | if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct in_pktinfo))) |
| 164 | return -EINVAL; |
| 165 | info = (struct in_pktinfo *)CMSG_DATA(cmsg); |
| 166 | ipc->oif = info->ipi_ifindex; |
| 167 | ipc->addr = info->ipi_spec_dst.s_addr; |
| 168 | break; |
| 169 | } |
| 170 | default: |
| 171 | return -EINVAL; |
| 172 | } |
| 173 | } |
| 174 | return 0; |
| 175 | } |
| 176 | |
| 177 | |
| 178 | /* Special input handler for packets caught by router alert option. |
| 179 | They are selected only by protocol field, and then processed likely |
| 180 | local ones; but only if someone wants them! Otherwise, router |
| 181 | not running rsvpd will kill RSVP. |
| 182 | |
| 183 | It is user level problem, what it will make with them. |
| 184 | I have no idea, how it will masquearde or NAT them (it is joke, joke :-)), |
| 185 | but receiver should be enough clever f.e. to forward mtrace requests, |
| 186 | sent to multicast group to reach destination designated router. |
| 187 | */ |
| 188 | struct ip_ra_chain *ip_ra_chain; |
| 189 | DEFINE_RWLOCK(ip_ra_lock); |
| 190 | |
| 191 | int ip_ra_control(struct sock *sk, unsigned char on, void (*destructor)(struct sock *)) |
| 192 | { |
| 193 | struct ip_ra_chain *ra, *new_ra, **rap; |
| 194 | |
| 195 | if (sk->sk_type != SOCK_RAW || inet_sk(sk)->num == IPPROTO_RAW) |
| 196 | return -EINVAL; |
| 197 | |
| 198 | new_ra = on ? kmalloc(sizeof(*new_ra), GFP_KERNEL) : NULL; |
| 199 | |
| 200 | write_lock_bh(&ip_ra_lock); |
| 201 | for (rap = &ip_ra_chain; (ra=*rap) != NULL; rap = &ra->next) { |
| 202 | if (ra->sk == sk) { |
| 203 | if (on) { |
| 204 | write_unlock_bh(&ip_ra_lock); |
Jesper Juhl | a51482b | 2005-11-08 09:41:34 -0800 | [diff] [blame] | 205 | kfree(new_ra); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | return -EADDRINUSE; |
| 207 | } |
| 208 | *rap = ra->next; |
| 209 | write_unlock_bh(&ip_ra_lock); |
| 210 | |
| 211 | if (ra->destructor) |
| 212 | ra->destructor(sk); |
| 213 | sock_put(sk); |
| 214 | kfree(ra); |
| 215 | return 0; |
| 216 | } |
| 217 | } |
| 218 | if (new_ra == NULL) { |
| 219 | write_unlock_bh(&ip_ra_lock); |
| 220 | return -ENOBUFS; |
| 221 | } |
| 222 | new_ra->sk = sk; |
| 223 | new_ra->destructor = destructor; |
| 224 | |
| 225 | new_ra->next = ra; |
| 226 | *rap = new_ra; |
| 227 | sock_hold(sk); |
| 228 | write_unlock_bh(&ip_ra_lock); |
| 229 | |
| 230 | return 0; |
| 231 | } |
| 232 | |
| 233 | void ip_icmp_error(struct sock *sk, struct sk_buff *skb, int err, |
| 234 | u16 port, u32 info, u8 *payload) |
| 235 | { |
| 236 | struct inet_sock *inet = inet_sk(sk); |
| 237 | struct sock_exterr_skb *serr; |
| 238 | |
| 239 | if (!inet->recverr) |
| 240 | return; |
| 241 | |
| 242 | skb = skb_clone(skb, GFP_ATOMIC); |
| 243 | if (!skb) |
| 244 | return; |
| 245 | |
| 246 | serr = SKB_EXT_ERR(skb); |
| 247 | serr->ee.ee_errno = err; |
| 248 | serr->ee.ee_origin = SO_EE_ORIGIN_ICMP; |
| 249 | serr->ee.ee_type = skb->h.icmph->type; |
| 250 | serr->ee.ee_code = skb->h.icmph->code; |
| 251 | serr->ee.ee_pad = 0; |
| 252 | serr->ee.ee_info = info; |
| 253 | serr->ee.ee_data = 0; |
| 254 | serr->addr_offset = (u8*)&(((struct iphdr*)(skb->h.icmph+1))->daddr) - skb->nh.raw; |
| 255 | serr->port = port; |
| 256 | |
| 257 | skb->h.raw = payload; |
| 258 | if (!skb_pull(skb, payload - skb->data) || |
| 259 | sock_queue_err_skb(sk, skb)) |
| 260 | kfree_skb(skb); |
| 261 | } |
| 262 | |
| 263 | void ip_local_error(struct sock *sk, int err, u32 daddr, u16 port, u32 info) |
| 264 | { |
| 265 | struct inet_sock *inet = inet_sk(sk); |
| 266 | struct sock_exterr_skb *serr; |
| 267 | struct iphdr *iph; |
| 268 | struct sk_buff *skb; |
| 269 | |
| 270 | if (!inet->recverr) |
| 271 | return; |
| 272 | |
| 273 | skb = alloc_skb(sizeof(struct iphdr), GFP_ATOMIC); |
| 274 | if (!skb) |
| 275 | return; |
| 276 | |
| 277 | iph = (struct iphdr*)skb_put(skb, sizeof(struct iphdr)); |
| 278 | skb->nh.iph = iph; |
| 279 | iph->daddr = daddr; |
| 280 | |
| 281 | serr = SKB_EXT_ERR(skb); |
| 282 | serr->ee.ee_errno = err; |
| 283 | serr->ee.ee_origin = SO_EE_ORIGIN_LOCAL; |
| 284 | serr->ee.ee_type = 0; |
| 285 | serr->ee.ee_code = 0; |
| 286 | serr->ee.ee_pad = 0; |
| 287 | serr->ee.ee_info = info; |
| 288 | serr->ee.ee_data = 0; |
| 289 | serr->addr_offset = (u8*)&iph->daddr - skb->nh.raw; |
| 290 | serr->port = port; |
| 291 | |
| 292 | skb->h.raw = skb->tail; |
| 293 | __skb_pull(skb, skb->tail - skb->data); |
| 294 | |
| 295 | if (sock_queue_err_skb(sk, skb)) |
| 296 | kfree_skb(skb); |
| 297 | } |
| 298 | |
| 299 | /* |
| 300 | * Handle MSG_ERRQUEUE |
| 301 | */ |
| 302 | int ip_recv_error(struct sock *sk, struct msghdr *msg, int len) |
| 303 | { |
| 304 | struct sock_exterr_skb *serr; |
| 305 | struct sk_buff *skb, *skb2; |
| 306 | struct sockaddr_in *sin; |
| 307 | struct { |
| 308 | struct sock_extended_err ee; |
| 309 | struct sockaddr_in offender; |
| 310 | } errhdr; |
| 311 | int err; |
| 312 | int copied; |
| 313 | |
| 314 | err = -EAGAIN; |
| 315 | skb = skb_dequeue(&sk->sk_error_queue); |
| 316 | if (skb == NULL) |
| 317 | goto out; |
| 318 | |
| 319 | copied = skb->len; |
| 320 | if (copied > len) { |
| 321 | msg->msg_flags |= MSG_TRUNC; |
| 322 | copied = len; |
| 323 | } |
| 324 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
| 325 | if (err) |
| 326 | goto out_free_skb; |
| 327 | |
| 328 | sock_recv_timestamp(msg, sk, skb); |
| 329 | |
| 330 | serr = SKB_EXT_ERR(skb); |
| 331 | |
| 332 | sin = (struct sockaddr_in *)msg->msg_name; |
| 333 | if (sin) { |
| 334 | sin->sin_family = AF_INET; |
| 335 | sin->sin_addr.s_addr = *(u32*)(skb->nh.raw + serr->addr_offset); |
| 336 | sin->sin_port = serr->port; |
| 337 | memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); |
| 338 | } |
| 339 | |
| 340 | memcpy(&errhdr.ee, &serr->ee, sizeof(struct sock_extended_err)); |
| 341 | sin = &errhdr.offender; |
| 342 | sin->sin_family = AF_UNSPEC; |
| 343 | if (serr->ee.ee_origin == SO_EE_ORIGIN_ICMP) { |
| 344 | struct inet_sock *inet = inet_sk(sk); |
| 345 | |
| 346 | sin->sin_family = AF_INET; |
| 347 | sin->sin_addr.s_addr = skb->nh.iph->saddr; |
| 348 | sin->sin_port = 0; |
| 349 | memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); |
| 350 | if (inet->cmsg_flags) |
| 351 | ip_cmsg_recv(msg, skb); |
| 352 | } |
| 353 | |
| 354 | put_cmsg(msg, SOL_IP, IP_RECVERR, sizeof(errhdr), &errhdr); |
| 355 | |
| 356 | /* Now we could try to dump offended packet options */ |
| 357 | |
| 358 | msg->msg_flags |= MSG_ERRQUEUE; |
| 359 | err = copied; |
| 360 | |
| 361 | /* Reset and regenerate socket error */ |
Herbert Xu | e0f9f85 | 2005-06-18 22:56:18 -0700 | [diff] [blame] | 362 | spin_lock_bh(&sk->sk_error_queue.lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | sk->sk_err = 0; |
| 364 | if ((skb2 = skb_peek(&sk->sk_error_queue)) != NULL) { |
| 365 | sk->sk_err = SKB_EXT_ERR(skb2)->ee.ee_errno; |
Herbert Xu | e0f9f85 | 2005-06-18 22:56:18 -0700 | [diff] [blame] | 366 | spin_unlock_bh(&sk->sk_error_queue.lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | sk->sk_error_report(sk); |
| 368 | } else |
Herbert Xu | e0f9f85 | 2005-06-18 22:56:18 -0700 | [diff] [blame] | 369 | spin_unlock_bh(&sk->sk_error_queue.lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | |
| 371 | out_free_skb: |
| 372 | kfree_skb(skb); |
| 373 | out: |
| 374 | return err; |
| 375 | } |
| 376 | |
| 377 | |
| 378 | /* |
| 379 | * Socket option code for IP. This is the end of the line after any TCP,UDP etc options on |
| 380 | * an IP socket. |
| 381 | */ |
| 382 | |
| 383 | int ip_setsockopt(struct sock *sk, int level, int optname, char __user *optval, int optlen) |
| 384 | { |
| 385 | struct inet_sock *inet = inet_sk(sk); |
| 386 | int val=0,err; |
| 387 | |
| 388 | if (level != SOL_IP) |
| 389 | return -ENOPROTOOPT; |
| 390 | |
| 391 | if (((1<<optname) & ((1<<IP_PKTINFO) | (1<<IP_RECVTTL) | |
| 392 | (1<<IP_RECVOPTS) | (1<<IP_RECVTOS) | |
| 393 | (1<<IP_RETOPTS) | (1<<IP_TOS) | |
| 394 | (1<<IP_TTL) | (1<<IP_HDRINCL) | |
| 395 | (1<<IP_MTU_DISCOVER) | (1<<IP_RECVERR) | |
| 396 | (1<<IP_ROUTER_ALERT) | (1<<IP_FREEBIND))) || |
| 397 | optname == IP_MULTICAST_TTL || |
| 398 | optname == IP_MULTICAST_LOOP) { |
| 399 | if (optlen >= sizeof(int)) { |
| 400 | if (get_user(val, (int __user *) optval)) |
| 401 | return -EFAULT; |
| 402 | } else if (optlen >= sizeof(char)) { |
| 403 | unsigned char ucval; |
| 404 | |
| 405 | if (get_user(ucval, (unsigned char __user *) optval)) |
| 406 | return -EFAULT; |
| 407 | val = (int) ucval; |
| 408 | } |
| 409 | } |
| 410 | |
| 411 | /* If optlen==0, it is equivalent to val == 0 */ |
| 412 | |
| 413 | #ifdef CONFIG_IP_MROUTE |
| 414 | if (optname >= MRT_BASE && optname <= (MRT_BASE + 10)) |
| 415 | return ip_mroute_setsockopt(sk,optname,optval,optlen); |
| 416 | #endif |
| 417 | |
| 418 | err = 0; |
| 419 | lock_sock(sk); |
| 420 | |
| 421 | switch (optname) { |
| 422 | case IP_OPTIONS: |
| 423 | { |
| 424 | struct ip_options * opt = NULL; |
| 425 | if (optlen > 40 || optlen < 0) |
| 426 | goto e_inval; |
Arnaldo Carvalho de Melo | 4c6ea29 | 2005-08-16 19:46:48 -0300 | [diff] [blame] | 427 | err = ip_options_get_from_user(&opt, optval, optlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | if (err) |
| 429 | break; |
| 430 | if (sk->sk_type == SOCK_STREAM) { |
| 431 | struct tcp_sock *tp = tcp_sk(sk); |
| 432 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
| 433 | if (sk->sk_family == PF_INET || |
| 434 | (!((1 << sk->sk_state) & |
| 435 | (TCPF_LISTEN | TCPF_CLOSE)) && |
| 436 | inet->daddr != LOOPBACK4_IPV6)) { |
| 437 | #endif |
| 438 | if (inet->opt) |
| 439 | tp->ext_header_len -= inet->opt->optlen; |
| 440 | if (opt) |
| 441 | tp->ext_header_len += opt->optlen; |
| 442 | tcp_sync_mss(sk, tp->pmtu_cookie); |
| 443 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
| 444 | } |
| 445 | #endif |
| 446 | } |
| 447 | opt = xchg(&inet->opt, opt); |
Jesper Juhl | a51482b | 2005-11-08 09:41:34 -0800 | [diff] [blame] | 448 | kfree(opt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | break; |
| 450 | } |
| 451 | case IP_PKTINFO: |
| 452 | if (val) |
| 453 | inet->cmsg_flags |= IP_CMSG_PKTINFO; |
| 454 | else |
| 455 | inet->cmsg_flags &= ~IP_CMSG_PKTINFO; |
| 456 | break; |
| 457 | case IP_RECVTTL: |
| 458 | if (val) |
| 459 | inet->cmsg_flags |= IP_CMSG_TTL; |
| 460 | else |
| 461 | inet->cmsg_flags &= ~IP_CMSG_TTL; |
| 462 | break; |
| 463 | case IP_RECVTOS: |
| 464 | if (val) |
| 465 | inet->cmsg_flags |= IP_CMSG_TOS; |
| 466 | else |
| 467 | inet->cmsg_flags &= ~IP_CMSG_TOS; |
| 468 | break; |
| 469 | case IP_RECVOPTS: |
| 470 | if (val) |
| 471 | inet->cmsg_flags |= IP_CMSG_RECVOPTS; |
| 472 | else |
| 473 | inet->cmsg_flags &= ~IP_CMSG_RECVOPTS; |
| 474 | break; |
| 475 | case IP_RETOPTS: |
| 476 | if (val) |
| 477 | inet->cmsg_flags |= IP_CMSG_RETOPTS; |
| 478 | else |
| 479 | inet->cmsg_flags &= ~IP_CMSG_RETOPTS; |
| 480 | break; |
| 481 | case IP_TOS: /* This sets both TOS and Precedence */ |
| 482 | if (sk->sk_type == SOCK_STREAM) { |
| 483 | val &= ~3; |
| 484 | val |= inet->tos & 3; |
| 485 | } |
| 486 | if (IPTOS_PREC(val) >= IPTOS_PREC_CRITIC_ECP && |
| 487 | !capable(CAP_NET_ADMIN)) { |
| 488 | err = -EPERM; |
| 489 | break; |
| 490 | } |
| 491 | if (inet->tos != val) { |
| 492 | inet->tos = val; |
| 493 | sk->sk_priority = rt_tos2priority(val); |
| 494 | sk_dst_reset(sk); |
| 495 | } |
| 496 | break; |
| 497 | case IP_TTL: |
| 498 | if (optlen<1) |
| 499 | goto e_inval; |
| 500 | if (val != -1 && (val < 1 || val>255)) |
| 501 | goto e_inval; |
| 502 | inet->uc_ttl = val; |
| 503 | break; |
| 504 | case IP_HDRINCL: |
| 505 | if (sk->sk_type != SOCK_RAW) { |
| 506 | err = -ENOPROTOOPT; |
| 507 | break; |
| 508 | } |
| 509 | inet->hdrincl = val ? 1 : 0; |
| 510 | break; |
| 511 | case IP_MTU_DISCOVER: |
| 512 | if (val<0 || val>2) |
| 513 | goto e_inval; |
| 514 | inet->pmtudisc = val; |
| 515 | break; |
| 516 | case IP_RECVERR: |
| 517 | inet->recverr = !!val; |
| 518 | if (!val) |
| 519 | skb_queue_purge(&sk->sk_error_queue); |
| 520 | break; |
| 521 | case IP_MULTICAST_TTL: |
| 522 | if (sk->sk_type == SOCK_STREAM) |
| 523 | goto e_inval; |
| 524 | if (optlen<1) |
| 525 | goto e_inval; |
| 526 | if (val==-1) |
| 527 | val = 1; |
| 528 | if (val < 0 || val > 255) |
| 529 | goto e_inval; |
| 530 | inet->mc_ttl = val; |
| 531 | break; |
| 532 | case IP_MULTICAST_LOOP: |
| 533 | if (optlen<1) |
| 534 | goto e_inval; |
| 535 | inet->mc_loop = !!val; |
| 536 | break; |
| 537 | case IP_MULTICAST_IF: |
| 538 | { |
| 539 | struct ip_mreqn mreq; |
| 540 | struct net_device *dev = NULL; |
| 541 | |
| 542 | if (sk->sk_type == SOCK_STREAM) |
| 543 | goto e_inval; |
| 544 | /* |
| 545 | * Check the arguments are allowable |
| 546 | */ |
| 547 | |
| 548 | err = -EFAULT; |
| 549 | if (optlen >= sizeof(struct ip_mreqn)) { |
| 550 | if (copy_from_user(&mreq,optval,sizeof(mreq))) |
| 551 | break; |
| 552 | } else { |
| 553 | memset(&mreq, 0, sizeof(mreq)); |
| 554 | if (optlen >= sizeof(struct in_addr) && |
| 555 | copy_from_user(&mreq.imr_address,optval,sizeof(struct in_addr))) |
| 556 | break; |
| 557 | } |
| 558 | |
| 559 | if (!mreq.imr_ifindex) { |
| 560 | if (mreq.imr_address.s_addr == INADDR_ANY) { |
| 561 | inet->mc_index = 0; |
| 562 | inet->mc_addr = 0; |
| 563 | err = 0; |
| 564 | break; |
| 565 | } |
| 566 | dev = ip_dev_find(mreq.imr_address.s_addr); |
| 567 | if (dev) { |
| 568 | mreq.imr_ifindex = dev->ifindex; |
| 569 | dev_put(dev); |
| 570 | } |
| 571 | } else |
| 572 | dev = __dev_get_by_index(mreq.imr_ifindex); |
| 573 | |
| 574 | |
| 575 | err = -EADDRNOTAVAIL; |
| 576 | if (!dev) |
| 577 | break; |
| 578 | |
| 579 | err = -EINVAL; |
| 580 | if (sk->sk_bound_dev_if && |
| 581 | mreq.imr_ifindex != sk->sk_bound_dev_if) |
| 582 | break; |
| 583 | |
| 584 | inet->mc_index = mreq.imr_ifindex; |
| 585 | inet->mc_addr = mreq.imr_address.s_addr; |
| 586 | err = 0; |
| 587 | break; |
| 588 | } |
| 589 | |
| 590 | case IP_ADD_MEMBERSHIP: |
| 591 | case IP_DROP_MEMBERSHIP: |
| 592 | { |
| 593 | struct ip_mreqn mreq; |
| 594 | |
| 595 | if (optlen < sizeof(struct ip_mreq)) |
| 596 | goto e_inval; |
| 597 | err = -EFAULT; |
| 598 | if (optlen >= sizeof(struct ip_mreqn)) { |
| 599 | if(copy_from_user(&mreq,optval,sizeof(mreq))) |
| 600 | break; |
| 601 | } else { |
| 602 | memset(&mreq, 0, sizeof(mreq)); |
| 603 | if (copy_from_user(&mreq,optval,sizeof(struct ip_mreq))) |
| 604 | break; |
| 605 | } |
| 606 | |
| 607 | if (optname == IP_ADD_MEMBERSHIP) |
| 608 | err = ip_mc_join_group(sk, &mreq); |
| 609 | else |
| 610 | err = ip_mc_leave_group(sk, &mreq); |
| 611 | break; |
| 612 | } |
| 613 | case IP_MSFILTER: |
| 614 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | extern int sysctl_igmp_max_msf; |
| 616 | struct ip_msfilter *msf; |
| 617 | |
| 618 | if (optlen < IP_MSFILTER_SIZE(0)) |
| 619 | goto e_inval; |
| 620 | if (optlen > sysctl_optmem_max) { |
| 621 | err = -ENOBUFS; |
| 622 | break; |
| 623 | } |
| 624 | msf = (struct ip_msfilter *)kmalloc(optlen, GFP_KERNEL); |
| 625 | if (msf == 0) { |
| 626 | err = -ENOBUFS; |
| 627 | break; |
| 628 | } |
| 629 | err = -EFAULT; |
| 630 | if (copy_from_user(msf, optval, optlen)) { |
| 631 | kfree(msf); |
| 632 | break; |
| 633 | } |
| 634 | /* numsrc >= (1G-4) overflow in 32 bits */ |
| 635 | if (msf->imsf_numsrc >= 0x3ffffffcU || |
| 636 | msf->imsf_numsrc > sysctl_igmp_max_msf) { |
| 637 | kfree(msf); |
| 638 | err = -ENOBUFS; |
| 639 | break; |
| 640 | } |
| 641 | if (IP_MSFILTER_SIZE(msf->imsf_numsrc) > optlen) { |
| 642 | kfree(msf); |
| 643 | err = -EINVAL; |
| 644 | break; |
| 645 | } |
| 646 | err = ip_mc_msfilter(sk, msf, 0); |
| 647 | kfree(msf); |
| 648 | break; |
| 649 | } |
| 650 | case IP_BLOCK_SOURCE: |
| 651 | case IP_UNBLOCK_SOURCE: |
| 652 | case IP_ADD_SOURCE_MEMBERSHIP: |
| 653 | case IP_DROP_SOURCE_MEMBERSHIP: |
| 654 | { |
| 655 | struct ip_mreq_source mreqs; |
| 656 | int omode, add; |
| 657 | |
| 658 | if (optlen != sizeof(struct ip_mreq_source)) |
| 659 | goto e_inval; |
| 660 | if (copy_from_user(&mreqs, optval, sizeof(mreqs))) { |
| 661 | err = -EFAULT; |
| 662 | break; |
| 663 | } |
| 664 | if (optname == IP_BLOCK_SOURCE) { |
| 665 | omode = MCAST_EXCLUDE; |
| 666 | add = 1; |
| 667 | } else if (optname == IP_UNBLOCK_SOURCE) { |
| 668 | omode = MCAST_EXCLUDE; |
| 669 | add = 0; |
| 670 | } else if (optname == IP_ADD_SOURCE_MEMBERSHIP) { |
| 671 | struct ip_mreqn mreq; |
| 672 | |
| 673 | mreq.imr_multiaddr.s_addr = mreqs.imr_multiaddr; |
| 674 | mreq.imr_address.s_addr = mreqs.imr_interface; |
| 675 | mreq.imr_ifindex = 0; |
| 676 | err = ip_mc_join_group(sk, &mreq); |
David L Stevens | 8cdaaa1 | 2005-07-08 17:39:23 -0700 | [diff] [blame] | 677 | if (err && err != -EADDRINUSE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | break; |
| 679 | omode = MCAST_INCLUDE; |
| 680 | add = 1; |
David L Stevens | 8cdaaa1 | 2005-07-08 17:39:23 -0700 | [diff] [blame] | 681 | } else /* IP_DROP_SOURCE_MEMBERSHIP */ { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | omode = MCAST_INCLUDE; |
| 683 | add = 0; |
| 684 | } |
| 685 | err = ip_mc_source(add, omode, sk, &mreqs, 0); |
| 686 | break; |
| 687 | } |
| 688 | case MCAST_JOIN_GROUP: |
| 689 | case MCAST_LEAVE_GROUP: |
| 690 | { |
| 691 | struct group_req greq; |
| 692 | struct sockaddr_in *psin; |
| 693 | struct ip_mreqn mreq; |
| 694 | |
| 695 | if (optlen < sizeof(struct group_req)) |
| 696 | goto e_inval; |
| 697 | err = -EFAULT; |
| 698 | if(copy_from_user(&greq, optval, sizeof(greq))) |
| 699 | break; |
| 700 | psin = (struct sockaddr_in *)&greq.gr_group; |
| 701 | if (psin->sin_family != AF_INET) |
| 702 | goto e_inval; |
| 703 | memset(&mreq, 0, sizeof(mreq)); |
| 704 | mreq.imr_multiaddr = psin->sin_addr; |
| 705 | mreq.imr_ifindex = greq.gr_interface; |
| 706 | |
| 707 | if (optname == MCAST_JOIN_GROUP) |
| 708 | err = ip_mc_join_group(sk, &mreq); |
| 709 | else |
| 710 | err = ip_mc_leave_group(sk, &mreq); |
| 711 | break; |
| 712 | } |
| 713 | case MCAST_JOIN_SOURCE_GROUP: |
| 714 | case MCAST_LEAVE_SOURCE_GROUP: |
| 715 | case MCAST_BLOCK_SOURCE: |
| 716 | case MCAST_UNBLOCK_SOURCE: |
| 717 | { |
| 718 | struct group_source_req greqs; |
| 719 | struct ip_mreq_source mreqs; |
| 720 | struct sockaddr_in *psin; |
| 721 | int omode, add; |
| 722 | |
| 723 | if (optlen != sizeof(struct group_source_req)) |
| 724 | goto e_inval; |
| 725 | if (copy_from_user(&greqs, optval, sizeof(greqs))) { |
| 726 | err = -EFAULT; |
| 727 | break; |
| 728 | } |
| 729 | if (greqs.gsr_group.ss_family != AF_INET || |
| 730 | greqs.gsr_source.ss_family != AF_INET) { |
| 731 | err = -EADDRNOTAVAIL; |
| 732 | break; |
| 733 | } |
| 734 | psin = (struct sockaddr_in *)&greqs.gsr_group; |
| 735 | mreqs.imr_multiaddr = psin->sin_addr.s_addr; |
| 736 | psin = (struct sockaddr_in *)&greqs.gsr_source; |
| 737 | mreqs.imr_sourceaddr = psin->sin_addr.s_addr; |
| 738 | mreqs.imr_interface = 0; /* use index for mc_source */ |
| 739 | |
| 740 | if (optname == MCAST_BLOCK_SOURCE) { |
| 741 | omode = MCAST_EXCLUDE; |
| 742 | add = 1; |
| 743 | } else if (optname == MCAST_UNBLOCK_SOURCE) { |
| 744 | omode = MCAST_EXCLUDE; |
| 745 | add = 0; |
| 746 | } else if (optname == MCAST_JOIN_SOURCE_GROUP) { |
| 747 | struct ip_mreqn mreq; |
| 748 | |
| 749 | psin = (struct sockaddr_in *)&greqs.gsr_group; |
| 750 | mreq.imr_multiaddr = psin->sin_addr; |
| 751 | mreq.imr_address.s_addr = 0; |
| 752 | mreq.imr_ifindex = greqs.gsr_interface; |
| 753 | err = ip_mc_join_group(sk, &mreq); |
David L Stevens | 8cdaaa1 | 2005-07-08 17:39:23 -0700 | [diff] [blame] | 754 | if (err && err != -EADDRINUSE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | break; |
| 756 | greqs.gsr_interface = mreq.imr_ifindex; |
| 757 | omode = MCAST_INCLUDE; |
| 758 | add = 1; |
| 759 | } else /* MCAST_LEAVE_SOURCE_GROUP */ { |
| 760 | omode = MCAST_INCLUDE; |
| 761 | add = 0; |
| 762 | } |
| 763 | err = ip_mc_source(add, omode, sk, &mreqs, |
| 764 | greqs.gsr_interface); |
| 765 | break; |
| 766 | } |
| 767 | case MCAST_MSFILTER: |
| 768 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | extern int sysctl_igmp_max_msf; |
| 770 | struct sockaddr_in *psin; |
| 771 | struct ip_msfilter *msf = NULL; |
| 772 | struct group_filter *gsf = NULL; |
| 773 | int msize, i, ifindex; |
| 774 | |
| 775 | if (optlen < GROUP_FILTER_SIZE(0)) |
| 776 | goto e_inval; |
| 777 | if (optlen > sysctl_optmem_max) { |
| 778 | err = -ENOBUFS; |
| 779 | break; |
| 780 | } |
| 781 | gsf = (struct group_filter *)kmalloc(optlen,GFP_KERNEL); |
| 782 | if (gsf == 0) { |
| 783 | err = -ENOBUFS; |
| 784 | break; |
| 785 | } |
| 786 | err = -EFAULT; |
| 787 | if (copy_from_user(gsf, optval, optlen)) { |
| 788 | goto mc_msf_out; |
| 789 | } |
| 790 | /* numsrc >= (4G-140)/128 overflow in 32 bits */ |
| 791 | if (gsf->gf_numsrc >= 0x1ffffff || |
| 792 | gsf->gf_numsrc > sysctl_igmp_max_msf) { |
| 793 | err = -ENOBUFS; |
| 794 | goto mc_msf_out; |
| 795 | } |
| 796 | if (GROUP_FILTER_SIZE(gsf->gf_numsrc) > optlen) { |
| 797 | err = -EINVAL; |
| 798 | goto mc_msf_out; |
| 799 | } |
| 800 | msize = IP_MSFILTER_SIZE(gsf->gf_numsrc); |
| 801 | msf = (struct ip_msfilter *)kmalloc(msize,GFP_KERNEL); |
| 802 | if (msf == 0) { |
| 803 | err = -ENOBUFS; |
| 804 | goto mc_msf_out; |
| 805 | } |
| 806 | ifindex = gsf->gf_interface; |
| 807 | psin = (struct sockaddr_in *)&gsf->gf_group; |
| 808 | if (psin->sin_family != AF_INET) { |
| 809 | err = -EADDRNOTAVAIL; |
| 810 | goto mc_msf_out; |
| 811 | } |
| 812 | msf->imsf_multiaddr = psin->sin_addr.s_addr; |
| 813 | msf->imsf_interface = 0; |
| 814 | msf->imsf_fmode = gsf->gf_fmode; |
| 815 | msf->imsf_numsrc = gsf->gf_numsrc; |
| 816 | err = -EADDRNOTAVAIL; |
| 817 | for (i=0; i<gsf->gf_numsrc; ++i) { |
| 818 | psin = (struct sockaddr_in *)&gsf->gf_slist[i]; |
| 819 | |
| 820 | if (psin->sin_family != AF_INET) |
| 821 | goto mc_msf_out; |
| 822 | msf->imsf_slist[i] = psin->sin_addr.s_addr; |
| 823 | } |
| 824 | kfree(gsf); |
| 825 | gsf = NULL; |
| 826 | |
| 827 | err = ip_mc_msfilter(sk, msf, ifindex); |
| 828 | mc_msf_out: |
Jesper Juhl | a51482b | 2005-11-08 09:41:34 -0800 | [diff] [blame] | 829 | kfree(msf); |
| 830 | kfree(gsf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | break; |
| 832 | } |
| 833 | case IP_ROUTER_ALERT: |
| 834 | err = ip_ra_control(sk, val ? 1 : 0, NULL); |
| 835 | break; |
| 836 | |
| 837 | case IP_FREEBIND: |
| 838 | if (optlen<1) |
| 839 | goto e_inval; |
| 840 | inet->freebind = !!val; |
| 841 | break; |
| 842 | |
| 843 | case IP_IPSEC_POLICY: |
| 844 | case IP_XFRM_POLICY: |
Herbert Xu | 6fc0b4a | 2005-08-06 06:33:15 -0700 | [diff] [blame] | 845 | err = -EPERM; |
| 846 | if (!capable(CAP_NET_ADMIN)) |
| 847 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | err = xfrm_user_policy(sk, optname, optval, optlen); |
| 849 | break; |
| 850 | |
| 851 | default: |
| 852 | #ifdef CONFIG_NETFILTER |
| 853 | err = nf_setsockopt(sk, PF_INET, optname, optval, |
| 854 | optlen); |
| 855 | #else |
| 856 | err = -ENOPROTOOPT; |
| 857 | #endif |
| 858 | break; |
| 859 | } |
| 860 | release_sock(sk); |
| 861 | return err; |
| 862 | |
| 863 | e_inval: |
| 864 | release_sock(sk); |
| 865 | return -EINVAL; |
| 866 | } |
| 867 | |
| 868 | /* |
| 869 | * Get the options. Note for future reference. The GET of IP options gets the |
| 870 | * _received_ ones. The set sets the _sent_ ones. |
| 871 | */ |
| 872 | |
| 873 | int ip_getsockopt(struct sock *sk, int level, int optname, char __user *optval, int __user *optlen) |
| 874 | { |
| 875 | struct inet_sock *inet = inet_sk(sk); |
| 876 | int val; |
| 877 | int len; |
| 878 | |
| 879 | if(level!=SOL_IP) |
| 880 | return -EOPNOTSUPP; |
| 881 | |
| 882 | #ifdef CONFIG_IP_MROUTE |
| 883 | if(optname>=MRT_BASE && optname <=MRT_BASE+10) |
| 884 | { |
| 885 | return ip_mroute_getsockopt(sk,optname,optval,optlen); |
| 886 | } |
| 887 | #endif |
| 888 | |
| 889 | if(get_user(len,optlen)) |
| 890 | return -EFAULT; |
| 891 | if(len < 0) |
| 892 | return -EINVAL; |
| 893 | |
| 894 | lock_sock(sk); |
| 895 | |
| 896 | switch(optname) { |
| 897 | case IP_OPTIONS: |
| 898 | { |
| 899 | unsigned char optbuf[sizeof(struct ip_options)+40]; |
| 900 | struct ip_options * opt = (struct ip_options*)optbuf; |
| 901 | opt->optlen = 0; |
| 902 | if (inet->opt) |
| 903 | memcpy(optbuf, inet->opt, |
| 904 | sizeof(struct ip_options)+ |
| 905 | inet->opt->optlen); |
| 906 | release_sock(sk); |
| 907 | |
| 908 | if (opt->optlen == 0) |
| 909 | return put_user(0, optlen); |
| 910 | |
| 911 | ip_options_undo(opt); |
| 912 | |
| 913 | len = min_t(unsigned int, len, opt->optlen); |
| 914 | if(put_user(len, optlen)) |
| 915 | return -EFAULT; |
| 916 | if(copy_to_user(optval, opt->__data, len)) |
| 917 | return -EFAULT; |
| 918 | return 0; |
| 919 | } |
| 920 | case IP_PKTINFO: |
| 921 | val = (inet->cmsg_flags & IP_CMSG_PKTINFO) != 0; |
| 922 | break; |
| 923 | case IP_RECVTTL: |
| 924 | val = (inet->cmsg_flags & IP_CMSG_TTL) != 0; |
| 925 | break; |
| 926 | case IP_RECVTOS: |
| 927 | val = (inet->cmsg_flags & IP_CMSG_TOS) != 0; |
| 928 | break; |
| 929 | case IP_RECVOPTS: |
| 930 | val = (inet->cmsg_flags & IP_CMSG_RECVOPTS) != 0; |
| 931 | break; |
| 932 | case IP_RETOPTS: |
| 933 | val = (inet->cmsg_flags & IP_CMSG_RETOPTS) != 0; |
| 934 | break; |
| 935 | case IP_TOS: |
| 936 | val = inet->tos; |
| 937 | break; |
| 938 | case IP_TTL: |
| 939 | val = (inet->uc_ttl == -1 ? |
| 940 | sysctl_ip_default_ttl : |
| 941 | inet->uc_ttl); |
| 942 | break; |
| 943 | case IP_HDRINCL: |
| 944 | val = inet->hdrincl; |
| 945 | break; |
| 946 | case IP_MTU_DISCOVER: |
| 947 | val = inet->pmtudisc; |
| 948 | break; |
| 949 | case IP_MTU: |
| 950 | { |
| 951 | struct dst_entry *dst; |
| 952 | val = 0; |
| 953 | dst = sk_dst_get(sk); |
| 954 | if (dst) { |
| 955 | val = dst_mtu(dst); |
| 956 | dst_release(dst); |
| 957 | } |
| 958 | if (!val) { |
| 959 | release_sock(sk); |
| 960 | return -ENOTCONN; |
| 961 | } |
| 962 | break; |
| 963 | } |
| 964 | case IP_RECVERR: |
| 965 | val = inet->recverr; |
| 966 | break; |
| 967 | case IP_MULTICAST_TTL: |
| 968 | val = inet->mc_ttl; |
| 969 | break; |
| 970 | case IP_MULTICAST_LOOP: |
| 971 | val = inet->mc_loop; |
| 972 | break; |
| 973 | case IP_MULTICAST_IF: |
| 974 | { |
| 975 | struct in_addr addr; |
| 976 | len = min_t(unsigned int, len, sizeof(struct in_addr)); |
| 977 | addr.s_addr = inet->mc_addr; |
| 978 | release_sock(sk); |
| 979 | |
| 980 | if(put_user(len, optlen)) |
| 981 | return -EFAULT; |
| 982 | if(copy_to_user(optval, &addr, len)) |
| 983 | return -EFAULT; |
| 984 | return 0; |
| 985 | } |
| 986 | case IP_MSFILTER: |
| 987 | { |
| 988 | struct ip_msfilter msf; |
| 989 | int err; |
| 990 | |
| 991 | if (len < IP_MSFILTER_SIZE(0)) { |
| 992 | release_sock(sk); |
| 993 | return -EINVAL; |
| 994 | } |
| 995 | if (copy_from_user(&msf, optval, IP_MSFILTER_SIZE(0))) { |
| 996 | release_sock(sk); |
| 997 | return -EFAULT; |
| 998 | } |
| 999 | err = ip_mc_msfget(sk, &msf, |
| 1000 | (struct ip_msfilter __user *)optval, optlen); |
| 1001 | release_sock(sk); |
| 1002 | return err; |
| 1003 | } |
| 1004 | case MCAST_MSFILTER: |
| 1005 | { |
| 1006 | struct group_filter gsf; |
| 1007 | int err; |
| 1008 | |
| 1009 | if (len < GROUP_FILTER_SIZE(0)) { |
| 1010 | release_sock(sk); |
| 1011 | return -EINVAL; |
| 1012 | } |
| 1013 | if (copy_from_user(&gsf, optval, GROUP_FILTER_SIZE(0))) { |
| 1014 | release_sock(sk); |
| 1015 | return -EFAULT; |
| 1016 | } |
| 1017 | err = ip_mc_gsfget(sk, &gsf, |
| 1018 | (struct group_filter __user *)optval, optlen); |
| 1019 | release_sock(sk); |
| 1020 | return err; |
| 1021 | } |
| 1022 | case IP_PKTOPTIONS: |
| 1023 | { |
| 1024 | struct msghdr msg; |
| 1025 | |
| 1026 | release_sock(sk); |
| 1027 | |
| 1028 | if (sk->sk_type != SOCK_STREAM) |
| 1029 | return -ENOPROTOOPT; |
| 1030 | |
| 1031 | msg.msg_control = optval; |
| 1032 | msg.msg_controllen = len; |
| 1033 | msg.msg_flags = 0; |
| 1034 | |
| 1035 | if (inet->cmsg_flags & IP_CMSG_PKTINFO) { |
| 1036 | struct in_pktinfo info; |
| 1037 | |
| 1038 | info.ipi_addr.s_addr = inet->rcv_saddr; |
| 1039 | info.ipi_spec_dst.s_addr = inet->rcv_saddr; |
| 1040 | info.ipi_ifindex = inet->mc_index; |
| 1041 | put_cmsg(&msg, SOL_IP, IP_PKTINFO, sizeof(info), &info); |
| 1042 | } |
| 1043 | if (inet->cmsg_flags & IP_CMSG_TTL) { |
| 1044 | int hlim = inet->mc_ttl; |
| 1045 | put_cmsg(&msg, SOL_IP, IP_TTL, sizeof(hlim), &hlim); |
| 1046 | } |
| 1047 | len -= msg.msg_controllen; |
| 1048 | return put_user(len, optlen); |
| 1049 | } |
| 1050 | case IP_FREEBIND: |
| 1051 | val = inet->freebind; |
| 1052 | break; |
| 1053 | default: |
| 1054 | #ifdef CONFIG_NETFILTER |
| 1055 | val = nf_getsockopt(sk, PF_INET, optname, optval, |
| 1056 | &len); |
| 1057 | release_sock(sk); |
| 1058 | if (val >= 0) |
| 1059 | val = put_user(len, optlen); |
| 1060 | return val; |
| 1061 | #else |
| 1062 | release_sock(sk); |
| 1063 | return -ENOPROTOOPT; |
| 1064 | #endif |
| 1065 | } |
| 1066 | release_sock(sk); |
| 1067 | |
| 1068 | if (len < sizeof(int) && len > 0 && val>=0 && val<255) { |
| 1069 | unsigned char ucval = (unsigned char)val; |
| 1070 | len = 1; |
| 1071 | if(put_user(len, optlen)) |
| 1072 | return -EFAULT; |
| 1073 | if(copy_to_user(optval,&ucval,1)) |
| 1074 | return -EFAULT; |
| 1075 | } else { |
| 1076 | len = min_t(unsigned int, sizeof(int), len); |
| 1077 | if(put_user(len, optlen)) |
| 1078 | return -EFAULT; |
| 1079 | if(copy_to_user(optval,&val,len)) |
| 1080 | return -EFAULT; |
| 1081 | } |
| 1082 | return 0; |
| 1083 | } |
| 1084 | |
| 1085 | EXPORT_SYMBOL(ip_cmsg_recv); |
| 1086 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1087 | EXPORT_SYMBOL(ip_getsockopt); |
| 1088 | EXPORT_SYMBOL(ip_setsockopt); |