Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * RAW sockets for IPv6 |
| 3 | * Linux INET6 implementation |
| 4 | * |
| 5 | * Authors: |
| 6 | * Pedro Roque <roque@di.fc.ul.pt> |
| 7 | * |
| 8 | * Adapted from linux/net/ipv4/raw.c |
| 9 | * |
| 10 | * $Id: raw.c,v 1.51 2002/02/01 22:01:04 davem Exp $ |
| 11 | * |
| 12 | * Fixes: |
| 13 | * Hideaki YOSHIFUJI : sin6_scope_id support |
| 14 | * YOSHIFUJI,H.@USAGI : raw checksum (RFC2292(bis) compliance) |
| 15 | * Kazunori MIYAZAWA @USAGI: change process style to use ip6_append_data |
| 16 | * |
| 17 | * This program is free software; you can redistribute it and/or |
| 18 | * modify it under the terms of the GNU General Public License |
| 19 | * as published by the Free Software Foundation; either version |
| 20 | * 2 of the License, or (at your option) any later version. |
| 21 | */ |
| 22 | |
| 23 | #include <linux/errno.h> |
| 24 | #include <linux/types.h> |
| 25 | #include <linux/socket.h> |
| 26 | #include <linux/sockios.h> |
| 27 | #include <linux/sched.h> |
| 28 | #include <linux/net.h> |
| 29 | #include <linux/in6.h> |
| 30 | #include <linux/netdevice.h> |
| 31 | #include <linux/if_arp.h> |
| 32 | #include <linux/icmpv6.h> |
| 33 | #include <linux/netfilter.h> |
| 34 | #include <linux/netfilter_ipv6.h> |
Herbert Xu | 3305b80 | 2005-12-13 23:16:37 -0800 | [diff] [blame] | 35 | #include <linux/skbuff.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include <asm/uaccess.h> |
| 37 | #include <asm/ioctls.h> |
| 38 | |
| 39 | #include <net/ip.h> |
| 40 | #include <net/sock.h> |
| 41 | #include <net/snmp.h> |
| 42 | |
| 43 | #include <net/ipv6.h> |
| 44 | #include <net/ndisc.h> |
| 45 | #include <net/protocol.h> |
| 46 | #include <net/ip6_route.h> |
| 47 | #include <net/ip6_checksum.h> |
| 48 | #include <net/addrconf.h> |
| 49 | #include <net/transp_v6.h> |
| 50 | #include <net/udp.h> |
| 51 | #include <net/inet_common.h> |
Arnaldo Carvalho de Melo | c752f07 | 2005-08-09 20:08:28 -0700 | [diff] [blame] | 52 | #include <net/tcp_states.h> |
Masahide NAKAMURA | 7be96f7 | 2006-08-23 20:35:31 -0700 | [diff] [blame] | 53 | #ifdef CONFIG_IPV6_MIP6 |
| 54 | #include <net/mip6.h> |
| 55 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | |
| 57 | #include <net/rawv6.h> |
| 58 | #include <net/xfrm.h> |
| 59 | |
| 60 | #include <linux/proc_fs.h> |
| 61 | #include <linux/seq_file.h> |
| 62 | |
| 63 | struct hlist_head raw_v6_htable[RAWV6_HTABLE_SIZE]; |
| 64 | DEFINE_RWLOCK(raw_v6_lock); |
| 65 | |
| 66 | static void raw_v6_hash(struct sock *sk) |
| 67 | { |
| 68 | struct hlist_head *list = &raw_v6_htable[inet_sk(sk)->num & |
| 69 | (RAWV6_HTABLE_SIZE - 1)]; |
| 70 | |
| 71 | write_lock_bh(&raw_v6_lock); |
| 72 | sk_add_node(sk, list); |
| 73 | sock_prot_inc_use(sk->sk_prot); |
| 74 | write_unlock_bh(&raw_v6_lock); |
| 75 | } |
| 76 | |
| 77 | static void raw_v6_unhash(struct sock *sk) |
| 78 | { |
| 79 | write_lock_bh(&raw_v6_lock); |
| 80 | if (sk_del_node_init(sk)) |
| 81 | sock_prot_dec_use(sk->sk_prot); |
| 82 | write_unlock_bh(&raw_v6_lock); |
| 83 | } |
| 84 | |
| 85 | |
| 86 | /* Grumble... icmp and ip_input want to get at this... */ |
| 87 | struct sock *__raw_v6_lookup(struct sock *sk, unsigned short num, |
Andrew McDonald | 0bd1b59 | 2005-08-09 19:44:42 -0700 | [diff] [blame] | 88 | struct in6_addr *loc_addr, struct in6_addr *rmt_addr, |
| 89 | int dif) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | { |
| 91 | struct hlist_node *node; |
| 92 | int is_multicast = ipv6_addr_is_multicast(loc_addr); |
| 93 | |
| 94 | sk_for_each_from(sk, node) |
| 95 | if (inet_sk(sk)->num == num) { |
| 96 | struct ipv6_pinfo *np = inet6_sk(sk); |
| 97 | |
| 98 | if (!ipv6_addr_any(&np->daddr) && |
| 99 | !ipv6_addr_equal(&np->daddr, rmt_addr)) |
| 100 | continue; |
| 101 | |
Andrew McDonald | 0bd1b59 | 2005-08-09 19:44:42 -0700 | [diff] [blame] | 102 | if (sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif) |
| 103 | continue; |
| 104 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | if (!ipv6_addr_any(&np->rcv_saddr)) { |
| 106 | if (ipv6_addr_equal(&np->rcv_saddr, loc_addr)) |
| 107 | goto found; |
| 108 | if (is_multicast && |
| 109 | inet6_mc_check(sk, loc_addr, rmt_addr)) |
| 110 | goto found; |
| 111 | continue; |
| 112 | } |
| 113 | goto found; |
| 114 | } |
| 115 | sk = NULL; |
| 116 | found: |
| 117 | return sk; |
| 118 | } |
| 119 | |
| 120 | /* |
| 121 | * 0 - deliver |
| 122 | * 1 - block |
| 123 | */ |
| 124 | static __inline__ int icmpv6_filter(struct sock *sk, struct sk_buff *skb) |
| 125 | { |
| 126 | struct icmp6hdr *icmph; |
| 127 | struct raw6_sock *rp = raw6_sk(sk); |
| 128 | |
| 129 | if (pskb_may_pull(skb, sizeof(struct icmp6hdr))) { |
| 130 | __u32 *data = &rp->filter.data[0]; |
| 131 | int bit_nr; |
| 132 | |
| 133 | icmph = (struct icmp6hdr *) skb->data; |
| 134 | bit_nr = icmph->icmp6_type; |
| 135 | |
| 136 | return (data[bit_nr >> 5] & (1 << (bit_nr & 31))) != 0; |
| 137 | } |
| 138 | return 0; |
| 139 | } |
| 140 | |
| 141 | /* |
| 142 | * demultiplex raw sockets. |
| 143 | * (should consider queueing the skb in the sock receive_queue |
| 144 | * without calling rawv6.c) |
| 145 | * |
| 146 | * Caller owns SKB so we must make clones. |
| 147 | */ |
Patrick McHardy | d13964f | 2005-08-09 19:45:02 -0700 | [diff] [blame] | 148 | int ipv6_raw_deliver(struct sk_buff *skb, int nexthdr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | { |
| 150 | struct in6_addr *saddr; |
| 151 | struct in6_addr *daddr; |
| 152 | struct sock *sk; |
Patrick McHardy | d13964f | 2005-08-09 19:45:02 -0700 | [diff] [blame] | 153 | int delivered = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | __u8 hash; |
| 155 | |
| 156 | saddr = &skb->nh.ipv6h->saddr; |
| 157 | daddr = saddr + 1; |
| 158 | |
| 159 | hash = nexthdr & (MAX_INET_PROTOS - 1); |
| 160 | |
| 161 | read_lock(&raw_v6_lock); |
| 162 | sk = sk_head(&raw_v6_htable[hash]); |
| 163 | |
| 164 | /* |
| 165 | * The first socket found will be delivered after |
| 166 | * delivery to transport protocols. |
| 167 | */ |
| 168 | |
| 169 | if (sk == NULL) |
| 170 | goto out; |
| 171 | |
YOSHIFUJI Hideaki | 2dac4b9 | 2005-09-01 17:44:49 -0700 | [diff] [blame] | 172 | sk = __raw_v6_lookup(sk, nexthdr, daddr, saddr, IP6CB(skb)->iif); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | |
| 174 | while (sk) { |
Masahide NAKAMURA | 7be96f7 | 2006-08-23 20:35:31 -0700 | [diff] [blame] | 175 | int filtered; |
| 176 | |
Patrick McHardy | d13964f | 2005-08-09 19:45:02 -0700 | [diff] [blame] | 177 | delivered = 1; |
Masahide NAKAMURA | 7be96f7 | 2006-08-23 20:35:31 -0700 | [diff] [blame] | 178 | switch (nexthdr) { |
| 179 | case IPPROTO_ICMPV6: |
| 180 | filtered = icmpv6_filter(sk, skb); |
| 181 | break; |
| 182 | #ifdef CONFIG_IPV6_MIP6 |
| 183 | case IPPROTO_MH: |
| 184 | /* XXX: To validate MH only once for each packet, |
| 185 | * this is placed here. It should be after checking |
| 186 | * xfrm policy, however it doesn't. The checking xfrm |
| 187 | * policy is placed in rawv6_rcv() because it is |
| 188 | * required for each socket. |
| 189 | */ |
| 190 | filtered = mip6_mh_filter(sk, skb); |
| 191 | break; |
| 192 | #endif |
| 193 | default: |
| 194 | filtered = 0; |
| 195 | break; |
| 196 | } |
| 197 | |
| 198 | if (filtered < 0) |
| 199 | break; |
| 200 | if (filtered == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC); |
| 202 | |
| 203 | /* Not releasing hash table! */ |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 204 | if (clone) { |
| 205 | nf_reset(clone); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | rawv6_rcv(sk, clone); |
Yasuyuki Kozakai | 9fb9cbb | 2005-11-09 16:38:16 -0800 | [diff] [blame] | 207 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | } |
Andrew McDonald | 0bd1b59 | 2005-08-09 19:44:42 -0700 | [diff] [blame] | 209 | sk = __raw_v6_lookup(sk_next(sk), nexthdr, daddr, saddr, |
YOSHIFUJI Hideaki | 2dac4b9 | 2005-09-01 17:44:49 -0700 | [diff] [blame] | 210 | IP6CB(skb)->iif); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | } |
| 212 | out: |
| 213 | read_unlock(&raw_v6_lock); |
Patrick McHardy | d13964f | 2005-08-09 19:45:02 -0700 | [diff] [blame] | 214 | return delivered; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | } |
| 216 | |
| 217 | /* This cleans up af_inet6 a bit. -DaveM */ |
| 218 | static int rawv6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len) |
| 219 | { |
| 220 | struct inet_sock *inet = inet_sk(sk); |
| 221 | struct ipv6_pinfo *np = inet6_sk(sk); |
| 222 | struct sockaddr_in6 *addr = (struct sockaddr_in6 *) uaddr; |
Al Viro | e69a4ad | 2006-11-14 20:56:00 -0800 | [diff] [blame] | 223 | __be32 v4addr = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | int addr_type; |
| 225 | int err; |
| 226 | |
| 227 | if (addr_len < SIN6_LEN_RFC2133) |
| 228 | return -EINVAL; |
| 229 | addr_type = ipv6_addr_type(&addr->sin6_addr); |
| 230 | |
| 231 | /* Raw sockets are IPv6 only */ |
| 232 | if (addr_type == IPV6_ADDR_MAPPED) |
| 233 | return(-EADDRNOTAVAIL); |
| 234 | |
| 235 | lock_sock(sk); |
| 236 | |
| 237 | err = -EINVAL; |
| 238 | if (sk->sk_state != TCP_CLOSE) |
| 239 | goto out; |
| 240 | |
| 241 | /* Check if the address belongs to the host. */ |
| 242 | if (addr_type != IPV6_ADDR_ANY) { |
| 243 | struct net_device *dev = NULL; |
| 244 | |
| 245 | if (addr_type & IPV6_ADDR_LINKLOCAL) { |
| 246 | if (addr_len >= sizeof(struct sockaddr_in6) && |
| 247 | addr->sin6_scope_id) { |
| 248 | /* Override any existing binding, if another |
| 249 | * one is supplied by user. |
| 250 | */ |
| 251 | sk->sk_bound_dev_if = addr->sin6_scope_id; |
| 252 | } |
| 253 | |
| 254 | /* Binding to link-local address requires an interface */ |
| 255 | if (!sk->sk_bound_dev_if) |
| 256 | goto out; |
| 257 | |
| 258 | dev = dev_get_by_index(sk->sk_bound_dev_if); |
| 259 | if (!dev) { |
| 260 | err = -ENODEV; |
| 261 | goto out; |
| 262 | } |
| 263 | } |
| 264 | |
| 265 | /* ipv4 addr of the socket is invalid. Only the |
| 266 | * unspecified and mapped address have a v4 equivalent. |
| 267 | */ |
| 268 | v4addr = LOOPBACK4_IPV6; |
| 269 | if (!(addr_type & IPV6_ADDR_MULTICAST)) { |
| 270 | err = -EADDRNOTAVAIL; |
| 271 | if (!ipv6_chk_addr(&addr->sin6_addr, dev, 0)) { |
| 272 | if (dev) |
| 273 | dev_put(dev); |
| 274 | goto out; |
| 275 | } |
| 276 | } |
| 277 | if (dev) |
| 278 | dev_put(dev); |
| 279 | } |
| 280 | |
| 281 | inet->rcv_saddr = inet->saddr = v4addr; |
| 282 | ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr); |
| 283 | if (!(addr_type & IPV6_ADDR_MULTICAST)) |
| 284 | ipv6_addr_copy(&np->saddr, &addr->sin6_addr); |
| 285 | err = 0; |
| 286 | out: |
| 287 | release_sock(sk); |
| 288 | return err; |
| 289 | } |
| 290 | |
| 291 | void rawv6_err(struct sock *sk, struct sk_buff *skb, |
| 292 | struct inet6_skb_parm *opt, |
Al Viro | 04ce690 | 2006-11-08 00:21:01 -0800 | [diff] [blame] | 293 | int type, int code, int offset, __be32 info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | { |
| 295 | struct inet_sock *inet = inet_sk(sk); |
| 296 | struct ipv6_pinfo *np = inet6_sk(sk); |
| 297 | int err; |
| 298 | int harderr; |
| 299 | |
| 300 | /* Report error on raw socket, if: |
| 301 | 1. User requested recverr. |
| 302 | 2. Socket is connected (otherwise the error indication |
| 303 | is useless without recverr and error is hard. |
| 304 | */ |
| 305 | if (!np->recverr && sk->sk_state != TCP_ESTABLISHED) |
| 306 | return; |
| 307 | |
| 308 | harderr = icmpv6_err_convert(type, code, &err); |
| 309 | if (type == ICMPV6_PKT_TOOBIG) |
| 310 | harderr = (np->pmtudisc == IPV6_PMTUDISC_DO); |
| 311 | |
| 312 | if (np->recverr) { |
| 313 | u8 *payload = skb->data; |
| 314 | if (!inet->hdrincl) |
| 315 | payload += offset; |
| 316 | ipv6_icmp_error(sk, skb, err, 0, ntohl(info), payload); |
| 317 | } |
| 318 | |
| 319 | if (np->recverr || harderr) { |
| 320 | sk->sk_err = err; |
| 321 | sk->sk_error_report(sk); |
| 322 | } |
| 323 | } |
| 324 | |
| 325 | static inline int rawv6_rcv_skb(struct sock * sk, struct sk_buff * skb) |
| 326 | { |
| 327 | if ((raw6_sk(sk)->checksum || sk->sk_filter) && |
Herbert Xu | fb286bb | 2005-11-10 13:01:24 -0800 | [diff] [blame] | 328 | skb_checksum_complete(skb)) { |
| 329 | /* FIXME: increment a raw6 drops counter here */ |
| 330 | kfree_skb(skb); |
| 331 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | } |
| 333 | |
| 334 | /* Charge it to the socket. */ |
| 335 | if (sock_queue_rcv_skb(sk,skb)<0) { |
| 336 | /* FIXME: increment a raw6 drops counter here */ |
| 337 | kfree_skb(skb); |
| 338 | return 0; |
| 339 | } |
| 340 | |
| 341 | return 0; |
| 342 | } |
| 343 | |
| 344 | /* |
| 345 | * This is next to useless... |
| 346 | * if we demultiplex in network layer we don't need the extra call |
| 347 | * just to queue the skb... |
| 348 | * maybe we could have the network decide upon a hint if it |
| 349 | * should call raw_rcv for demultiplexing |
| 350 | */ |
| 351 | int rawv6_rcv(struct sock *sk, struct sk_buff *skb) |
| 352 | { |
| 353 | struct inet_sock *inet = inet_sk(sk); |
| 354 | struct raw6_sock *rp = raw6_sk(sk); |
| 355 | |
| 356 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) { |
| 357 | kfree_skb(skb); |
| 358 | return NET_RX_DROP; |
| 359 | } |
| 360 | |
| 361 | if (!rp->checksum) |
| 362 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 363 | |
Patrick McHardy | 84fa793 | 2006-08-29 16:44:56 -0700 | [diff] [blame] | 364 | if (skb->ip_summed == CHECKSUM_COMPLETE) { |
Herbert Xu | fb286bb | 2005-11-10 13:01:24 -0800 | [diff] [blame] | 365 | skb_postpull_rcsum(skb, skb->nh.raw, |
| 366 | skb->h.raw - skb->nh.raw); |
| 367 | if (!csum_ipv6_magic(&skb->nh.ipv6h->saddr, |
| 368 | &skb->nh.ipv6h->daddr, |
| 369 | skb->len, inet->num, skb->csum)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | } |
Herbert Xu | fb286bb | 2005-11-10 13:01:24 -0800 | [diff] [blame] | 372 | if (skb->ip_summed != CHECKSUM_UNNECESSARY) |
Al Viro | 868c86b | 2006-11-14 21:35:48 -0800 | [diff] [blame] | 373 | skb->csum = ~csum_unfold(csum_ipv6_magic(&skb->nh.ipv6h->saddr, |
Herbert Xu | fb286bb | 2005-11-10 13:01:24 -0800 | [diff] [blame] | 374 | &skb->nh.ipv6h->daddr, |
Al Viro | 868c86b | 2006-11-14 21:35:48 -0800 | [diff] [blame] | 375 | skb->len, inet->num, 0)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | |
| 377 | if (inet->hdrincl) { |
Herbert Xu | fb286bb | 2005-11-10 13:01:24 -0800 | [diff] [blame] | 378 | if (skb_checksum_complete(skb)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | /* FIXME: increment a raw6 drops counter here */ |
| 380 | kfree_skb(skb); |
| 381 | return 0; |
| 382 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | } |
| 384 | |
| 385 | rawv6_rcv_skb(sk, skb); |
| 386 | return 0; |
| 387 | } |
| 388 | |
| 389 | |
| 390 | /* |
| 391 | * This should be easy, if there is something there |
| 392 | * we return it, otherwise we block. |
| 393 | */ |
| 394 | |
| 395 | static int rawv6_recvmsg(struct kiocb *iocb, struct sock *sk, |
| 396 | struct msghdr *msg, size_t len, |
| 397 | int noblock, int flags, int *addr_len) |
| 398 | { |
| 399 | struct ipv6_pinfo *np = inet6_sk(sk); |
| 400 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)msg->msg_name; |
| 401 | struct sk_buff *skb; |
| 402 | size_t copied; |
| 403 | int err; |
| 404 | |
| 405 | if (flags & MSG_OOB) |
| 406 | return -EOPNOTSUPP; |
| 407 | |
| 408 | if (addr_len) |
| 409 | *addr_len=sizeof(*sin6); |
| 410 | |
| 411 | if (flags & MSG_ERRQUEUE) |
| 412 | return ipv6_recv_error(sk, msg, len); |
| 413 | |
| 414 | skb = skb_recv_datagram(sk, flags, noblock, &err); |
| 415 | if (!skb) |
| 416 | goto out; |
| 417 | |
| 418 | copied = skb->len; |
| 419 | if (copied > len) { |
| 420 | copied = len; |
| 421 | msg->msg_flags |= MSG_TRUNC; |
| 422 | } |
| 423 | |
| 424 | if (skb->ip_summed==CHECKSUM_UNNECESSARY) { |
| 425 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
| 426 | } else if (msg->msg_flags&MSG_TRUNC) { |
Herbert Xu | fb286bb | 2005-11-10 13:01:24 -0800 | [diff] [blame] | 427 | if (__skb_checksum_complete(skb)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | goto csum_copy_err; |
| 429 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
| 430 | } else { |
| 431 | err = skb_copy_and_csum_datagram_iovec(skb, 0, msg->msg_iov); |
| 432 | if (err == -EINVAL) |
| 433 | goto csum_copy_err; |
| 434 | } |
| 435 | if (err) |
| 436 | goto out_free; |
| 437 | |
| 438 | /* Copy the address. */ |
| 439 | if (sin6) { |
| 440 | sin6->sin6_family = AF_INET6; |
Tetsuo Handa | f59fc7f | 2006-07-25 17:05:35 -0700 | [diff] [blame] | 441 | sin6->sin6_port = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | ipv6_addr_copy(&sin6->sin6_addr, &skb->nh.ipv6h->saddr); |
| 443 | sin6->sin6_flowinfo = 0; |
| 444 | sin6->sin6_scope_id = 0; |
| 445 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) |
| 446 | sin6->sin6_scope_id = IP6CB(skb)->iif; |
| 447 | } |
| 448 | |
| 449 | sock_recv_timestamp(msg, sk, skb); |
| 450 | |
| 451 | if (np->rxopt.all) |
| 452 | datagram_recv_ctl(sk, msg, skb); |
| 453 | |
| 454 | err = copied; |
| 455 | if (flags & MSG_TRUNC) |
| 456 | err = skb->len; |
| 457 | |
| 458 | out_free: |
| 459 | skb_free_datagram(sk, skb); |
| 460 | out: |
| 461 | return err; |
| 462 | |
| 463 | csum_copy_err: |
Herbert Xu | 3305b80 | 2005-12-13 23:16:37 -0800 | [diff] [blame] | 464 | skb_kill_datagram(sk, skb, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | |
| 466 | /* Error for blocking case is chosen to masquerade |
| 467 | as some normal condition. |
| 468 | */ |
| 469 | err = (flags&MSG_DONTWAIT) ? -EAGAIN : -EHOSTUNREACH; |
| 470 | /* FIXME: increment a raw6 drops counter here */ |
Herbert Xu | 3305b80 | 2005-12-13 23:16:37 -0800 | [diff] [blame] | 471 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | } |
| 473 | |
| 474 | static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl, |
Herbert Xu | 357b40a | 2005-04-19 22:30:14 -0700 | [diff] [blame] | 475 | struct raw6_sock *rp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | { |
| 477 | struct sk_buff *skb; |
| 478 | int err = 0; |
Herbert Xu | 357b40a | 2005-04-19 22:30:14 -0700 | [diff] [blame] | 479 | int offset; |
| 480 | int len; |
Herbert Xu | 679a873 | 2005-05-03 14:24:36 -0700 | [diff] [blame] | 481 | int total_len; |
Al Viro | 868c86b | 2006-11-14 21:35:48 -0800 | [diff] [blame] | 482 | __wsum tmp_csum; |
| 483 | __sum16 csum; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | |
| 485 | if (!rp->checksum) |
| 486 | goto send; |
| 487 | |
| 488 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) |
| 489 | goto out; |
| 490 | |
Herbert Xu | 357b40a | 2005-04-19 22:30:14 -0700 | [diff] [blame] | 491 | offset = rp->offset; |
Herbert Xu | 679a873 | 2005-05-03 14:24:36 -0700 | [diff] [blame] | 492 | total_len = inet_sk(sk)->cork.length - (skb->nh.raw - skb->data); |
| 493 | if (offset >= total_len - 1) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | err = -EINVAL; |
Herbert Xu | 357b40a | 2005-04-19 22:30:14 -0700 | [diff] [blame] | 495 | ip6_flush_pending_frames(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | goto out; |
| 497 | } |
| 498 | |
| 499 | /* should be check HW csum miyazawa */ |
| 500 | if (skb_queue_len(&sk->sk_write_queue) == 1) { |
| 501 | /* |
| 502 | * Only one fragment on the socket. |
| 503 | */ |
| 504 | tmp_csum = skb->csum; |
| 505 | } else { |
Herbert Xu | 357b40a | 2005-04-19 22:30:14 -0700 | [diff] [blame] | 506 | struct sk_buff *csum_skb = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | tmp_csum = 0; |
| 508 | |
| 509 | skb_queue_walk(&sk->sk_write_queue, skb) { |
| 510 | tmp_csum = csum_add(tmp_csum, skb->csum); |
Herbert Xu | 357b40a | 2005-04-19 22:30:14 -0700 | [diff] [blame] | 511 | |
| 512 | if (csum_skb) |
| 513 | continue; |
| 514 | |
| 515 | len = skb->len - (skb->h.raw - skb->data); |
| 516 | if (offset >= len) { |
| 517 | offset -= len; |
| 518 | continue; |
| 519 | } |
| 520 | |
| 521 | csum_skb = skb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | } |
Herbert Xu | 357b40a | 2005-04-19 22:30:14 -0700 | [diff] [blame] | 523 | |
| 524 | skb = csum_skb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | } |
| 526 | |
Herbert Xu | 357b40a | 2005-04-19 22:30:14 -0700 | [diff] [blame] | 527 | offset += skb->h.raw - skb->data; |
| 528 | if (skb_copy_bits(skb, offset, &csum, 2)) |
| 529 | BUG(); |
| 530 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | /* in case cksum was not initialized */ |
Herbert Xu | 357b40a | 2005-04-19 22:30:14 -0700 | [diff] [blame] | 532 | if (unlikely(csum)) |
Al Viro | 5f92a73 | 2006-11-14 21:36:54 -0800 | [diff] [blame] | 533 | tmp_csum = csum_sub(tmp_csum, csum_unfold(csum)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | |
Al Viro | 868c86b | 2006-11-14 21:35:48 -0800 | [diff] [blame] | 535 | csum = csum_ipv6_magic(&fl->fl6_src, |
Herbert Xu | 357b40a | 2005-04-19 22:30:14 -0700 | [diff] [blame] | 536 | &fl->fl6_dst, |
Herbert Xu | 679a873 | 2005-05-03 14:24:36 -0700 | [diff] [blame] | 537 | total_len, fl->proto, tmp_csum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | |
Al Viro | f6ab028 | 2006-11-16 02:36:50 -0800 | [diff] [blame] | 539 | if (csum == 0 && fl->proto == IPPROTO_UDP) |
| 540 | csum = CSUM_MANGLED_0; |
Herbert Xu | 357b40a | 2005-04-19 22:30:14 -0700 | [diff] [blame] | 541 | |
Herbert Xu | 357b40a | 2005-04-19 22:30:14 -0700 | [diff] [blame] | 542 | if (skb_store_bits(skb, offset, &csum, 2)) |
| 543 | BUG(); |
| 544 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | send: |
| 546 | err = ip6_push_pending_frames(sk); |
| 547 | out: |
| 548 | return err; |
| 549 | } |
| 550 | |
| 551 | static int rawv6_send_hdrinc(struct sock *sk, void *from, int length, |
| 552 | struct flowi *fl, struct rt6_info *rt, |
| 553 | unsigned int flags) |
| 554 | { |
Herbert Xu | 3320da8 | 2005-04-19 22:32:22 -0700 | [diff] [blame] | 555 | struct ipv6_pinfo *np = inet6_sk(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | struct ipv6hdr *iph; |
| 557 | struct sk_buff *skb; |
| 558 | unsigned int hh_len; |
| 559 | int err; |
| 560 | |
| 561 | if (length > rt->u.dst.dev->mtu) { |
| 562 | ipv6_local_error(sk, EMSGSIZE, fl, rt->u.dst.dev->mtu); |
| 563 | return -EMSGSIZE; |
| 564 | } |
| 565 | if (flags&MSG_PROBE) |
| 566 | goto out; |
| 567 | |
| 568 | hh_len = LL_RESERVED_SPACE(rt->u.dst.dev); |
| 569 | |
| 570 | skb = sock_alloc_send_skb(sk, length+hh_len+15, |
| 571 | flags&MSG_DONTWAIT, &err); |
| 572 | if (skb == NULL) |
| 573 | goto error; |
| 574 | skb_reserve(skb, hh_len); |
| 575 | |
| 576 | skb->priority = sk->sk_priority; |
| 577 | skb->dst = dst_clone(&rt->u.dst); |
| 578 | |
| 579 | skb->nh.ipv6h = iph = (struct ipv6hdr *)skb_put(skb, length); |
| 580 | |
| 581 | skb->ip_summed = CHECKSUM_NONE; |
| 582 | |
| 583 | skb->h.raw = skb->nh.raw; |
| 584 | err = memcpy_fromiovecend((void *)iph, from, 0, length); |
| 585 | if (err) |
| 586 | goto error_fault; |
| 587 | |
YOSHIFUJI Hideaki | a11d206 | 2006-11-04 20:11:37 +0900 | [diff] [blame] | 588 | IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTREQUESTS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, rt->u.dst.dev, |
| 590 | dst_output); |
| 591 | if (err > 0) |
Herbert Xu | 3320da8 | 2005-04-19 22:32:22 -0700 | [diff] [blame] | 592 | err = np->recverr ? net_xmit_errno(err) : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | if (err) |
| 594 | goto error; |
| 595 | out: |
| 596 | return 0; |
| 597 | |
| 598 | error_fault: |
| 599 | err = -EFAULT; |
| 600 | kfree_skb(skb); |
| 601 | error: |
YOSHIFUJI Hideaki | a11d206 | 2006-11-04 20:11:37 +0900 | [diff] [blame] | 602 | IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTDISCARDS); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | return err; |
| 604 | } |
| 605 | |
Heiko Carstens | a27b58f | 2006-10-30 15:06:12 -0800 | [diff] [blame] | 606 | static int rawv6_probe_proto_opt(struct flowi *fl, struct msghdr *msg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | { |
| 608 | struct iovec *iov; |
| 609 | u8 __user *type = NULL; |
| 610 | u8 __user *code = NULL; |
Masahide NAKAMURA | 6e8f4d4 | 2006-08-23 20:36:47 -0700 | [diff] [blame] | 611 | #ifdef CONFIG_IPV6_MIP6 |
| 612 | u8 len = 0; |
| 613 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | int probed = 0; |
| 615 | int i; |
| 616 | |
| 617 | if (!msg->msg_iov) |
Heiko Carstens | a27b58f | 2006-10-30 15:06:12 -0800 | [diff] [blame] | 618 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | |
| 620 | for (i = 0; i < msg->msg_iovlen; i++) { |
| 621 | iov = &msg->msg_iov[i]; |
| 622 | if (!iov) |
| 623 | continue; |
| 624 | |
| 625 | switch (fl->proto) { |
| 626 | case IPPROTO_ICMPV6: |
| 627 | /* check if one-byte field is readable or not. */ |
| 628 | if (iov->iov_base && iov->iov_len < 1) |
| 629 | break; |
| 630 | |
| 631 | if (!type) { |
| 632 | type = iov->iov_base; |
| 633 | /* check if code field is readable or not. */ |
| 634 | if (iov->iov_len > 1) |
| 635 | code = type + 1; |
| 636 | } else if (!code) |
| 637 | code = iov->iov_base; |
| 638 | |
| 639 | if (type && code) { |
Heiko Carstens | a27b58f | 2006-10-30 15:06:12 -0800 | [diff] [blame] | 640 | if (get_user(fl->fl_icmp_type, type) || |
| 641 | get_user(fl->fl_icmp_code, code)) |
| 642 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | probed = 1; |
| 644 | } |
| 645 | break; |
Masahide NAKAMURA | 6e8f4d4 | 2006-08-23 20:36:47 -0700 | [diff] [blame] | 646 | #ifdef CONFIG_IPV6_MIP6 |
| 647 | case IPPROTO_MH: |
| 648 | if (iov->iov_base && iov->iov_len < 1) |
| 649 | break; |
| 650 | /* check if type field is readable or not. */ |
| 651 | if (iov->iov_len > 2 - len) { |
| 652 | u8 __user *p = iov->iov_base; |
Heiko Carstens | a27b58f | 2006-10-30 15:06:12 -0800 | [diff] [blame] | 653 | if (get_user(fl->fl_mh_type, &p[2 - len])) |
| 654 | return -EFAULT; |
Masahide NAKAMURA | 6e8f4d4 | 2006-08-23 20:36:47 -0700 | [diff] [blame] | 655 | probed = 1; |
| 656 | } else |
| 657 | len += iov->iov_len; |
| 658 | |
| 659 | break; |
| 660 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | default: |
| 662 | probed = 1; |
| 663 | break; |
| 664 | } |
| 665 | if (probed) |
| 666 | break; |
| 667 | } |
Heiko Carstens | a27b58f | 2006-10-30 15:06:12 -0800 | [diff] [blame] | 668 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | } |
| 670 | |
| 671 | static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk, |
| 672 | struct msghdr *msg, size_t len) |
| 673 | { |
| 674 | struct ipv6_txoptions opt_space; |
| 675 | struct sockaddr_in6 * sin6 = (struct sockaddr_in6 *) msg->msg_name; |
| 676 | struct in6_addr *daddr, *final_p = NULL, final; |
| 677 | struct inet_sock *inet = inet_sk(sk); |
| 678 | struct ipv6_pinfo *np = inet6_sk(sk); |
| 679 | struct raw6_sock *rp = raw6_sk(sk); |
| 680 | struct ipv6_txoptions *opt = NULL; |
| 681 | struct ip6_flowlabel *flowlabel = NULL; |
| 682 | struct dst_entry *dst = NULL; |
| 683 | struct flowi fl; |
| 684 | int addr_len = msg->msg_namelen; |
| 685 | int hlimit = -1; |
YOSHIFUJI Hideaki | 41a1f8e | 2005-09-08 10:19:03 +0900 | [diff] [blame] | 686 | int tclass = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | u16 proto; |
| 688 | int err; |
| 689 | |
| 690 | /* Rough check on arithmetic overflow, |
| 691 | better check is made in ip6_build_xmit |
| 692 | */ |
| 693 | if (len < 0) |
| 694 | return -EMSGSIZE; |
| 695 | |
| 696 | /* Mirror BSD error message compatibility */ |
| 697 | if (msg->msg_flags & MSG_OOB) |
| 698 | return -EOPNOTSUPP; |
| 699 | |
| 700 | /* |
| 701 | * Get and verify the address. |
| 702 | */ |
| 703 | memset(&fl, 0, sizeof(fl)); |
| 704 | |
| 705 | if (sin6) { |
| 706 | if (addr_len < SIN6_LEN_RFC2133) |
| 707 | return -EINVAL; |
| 708 | |
| 709 | if (sin6->sin6_family && sin6->sin6_family != AF_INET6) |
| 710 | return(-EAFNOSUPPORT); |
| 711 | |
| 712 | /* port is the proto value [0..255] carried in nexthdr */ |
| 713 | proto = ntohs(sin6->sin6_port); |
| 714 | |
| 715 | if (!proto) |
| 716 | proto = inet->num; |
| 717 | else if (proto != inet->num) |
| 718 | return(-EINVAL); |
| 719 | |
| 720 | if (proto > 255) |
| 721 | return(-EINVAL); |
| 722 | |
| 723 | daddr = &sin6->sin6_addr; |
| 724 | if (np->sndflow) { |
| 725 | fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; |
| 726 | if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) { |
| 727 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); |
| 728 | if (flowlabel == NULL) |
| 729 | return -EINVAL; |
| 730 | daddr = &flowlabel->dst; |
| 731 | } |
| 732 | } |
| 733 | |
| 734 | /* |
| 735 | * Otherwise it will be difficult to maintain |
| 736 | * sk->sk_dst_cache. |
| 737 | */ |
| 738 | if (sk->sk_state == TCP_ESTABLISHED && |
| 739 | ipv6_addr_equal(daddr, &np->daddr)) |
| 740 | daddr = &np->daddr; |
| 741 | |
| 742 | if (addr_len >= sizeof(struct sockaddr_in6) && |
| 743 | sin6->sin6_scope_id && |
| 744 | ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) |
| 745 | fl.oif = sin6->sin6_scope_id; |
| 746 | } else { |
| 747 | if (sk->sk_state != TCP_ESTABLISHED) |
| 748 | return -EDESTADDRREQ; |
| 749 | |
| 750 | proto = inet->num; |
| 751 | daddr = &np->daddr; |
| 752 | fl.fl6_flowlabel = np->flow_label; |
| 753 | } |
| 754 | |
| 755 | if (ipv6_addr_any(daddr)) { |
| 756 | /* |
| 757 | * unspecified destination address |
| 758 | * treated as error... is this correct ? |
| 759 | */ |
| 760 | fl6_sock_release(flowlabel); |
| 761 | return(-EINVAL); |
| 762 | } |
| 763 | |
| 764 | if (fl.oif == 0) |
| 765 | fl.oif = sk->sk_bound_dev_if; |
| 766 | |
| 767 | if (msg->msg_controllen) { |
| 768 | opt = &opt_space; |
| 769 | memset(opt, 0, sizeof(struct ipv6_txoptions)); |
| 770 | opt->tot_len = sizeof(struct ipv6_txoptions); |
| 771 | |
YOSHIFUJI Hideaki | 41a1f8e | 2005-09-08 10:19:03 +0900 | [diff] [blame] | 772 | err = datagram_send_ctl(msg, &fl, opt, &hlimit, &tclass); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | if (err < 0) { |
| 774 | fl6_sock_release(flowlabel); |
| 775 | return err; |
| 776 | } |
| 777 | if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { |
| 778 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); |
| 779 | if (flowlabel == NULL) |
| 780 | return -EINVAL; |
| 781 | } |
| 782 | if (!(opt->opt_nflen|opt->opt_flen)) |
| 783 | opt = NULL; |
| 784 | } |
| 785 | if (opt == NULL) |
| 786 | opt = np->opt; |
YOSHIFUJI Hideaki | df9890c | 2005-11-20 12:23:18 +0900 | [diff] [blame] | 787 | if (flowlabel) |
| 788 | opt = fl6_merge_options(&opt_space, flowlabel, opt); |
| 789 | opt = ipv6_fixup_options(&opt_space, opt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | |
| 791 | fl.proto = proto; |
Heiko Carstens | a27b58f | 2006-10-30 15:06:12 -0800 | [diff] [blame] | 792 | err = rawv6_probe_proto_opt(&fl, msg); |
| 793 | if (err) |
| 794 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | |
| 796 | ipv6_addr_copy(&fl.fl6_dst, daddr); |
| 797 | if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr)) |
| 798 | ipv6_addr_copy(&fl.fl6_src, &np->saddr); |
| 799 | |
| 800 | /* merge ip6_build_xmit from ip6_output */ |
| 801 | if (opt && opt->srcrt) { |
| 802 | struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt; |
| 803 | ipv6_addr_copy(&final, &fl.fl6_dst); |
| 804 | ipv6_addr_copy(&fl.fl6_dst, rt0->addr); |
| 805 | final_p = &final; |
| 806 | } |
| 807 | |
| 808 | if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) |
| 809 | fl.oif = np->mcast_oif; |
Venkat Yekkirala | beb8d13 | 2006-08-04 23:12:42 -0700 | [diff] [blame] | 810 | security_sk_classify_flow(sk, &fl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | |
| 812 | err = ip6_dst_lookup(sk, &dst, &fl); |
| 813 | if (err) |
| 814 | goto out; |
| 815 | if (final_p) |
| 816 | ipv6_addr_copy(&fl.fl6_dst, final_p); |
| 817 | |
Patrick McHardy | e104411 | 2005-09-08 15:11:55 -0700 | [diff] [blame] | 818 | if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | |
| 821 | if (hlimit < 0) { |
| 822 | if (ipv6_addr_is_multicast(&fl.fl6_dst)) |
| 823 | hlimit = np->mcast_hops; |
| 824 | else |
| 825 | hlimit = np->hop_limit; |
| 826 | if (hlimit < 0) |
| 827 | hlimit = dst_metric(dst, RTAX_HOPLIMIT); |
| 828 | if (hlimit < 0) |
| 829 | hlimit = ipv6_get_hoplimit(dst->dev); |
| 830 | } |
| 831 | |
YOSHIFUJI Hideaki | 41a1f8e | 2005-09-08 10:19:03 +0900 | [diff] [blame] | 832 | if (tclass < 0) { |
YOSHIFUJI Hideaki | e012d51 | 2006-09-13 20:01:28 -0700 | [diff] [blame] | 833 | tclass = np->tclass; |
YOSHIFUJI Hideaki | 41a1f8e | 2005-09-08 10:19:03 +0900 | [diff] [blame] | 834 | if (tclass < 0) |
| 835 | tclass = 0; |
| 836 | } |
| 837 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | if (msg->msg_flags&MSG_CONFIRM) |
| 839 | goto do_confirm; |
| 840 | |
| 841 | back_from_confirm: |
| 842 | if (inet->hdrincl) { |
| 843 | err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl, (struct rt6_info*)dst, msg->msg_flags); |
| 844 | } else { |
| 845 | lock_sock(sk); |
YOSHIFUJI Hideaki | 41a1f8e | 2005-09-08 10:19:03 +0900 | [diff] [blame] | 846 | err = ip6_append_data(sk, ip_generic_getfrag, msg->msg_iov, |
| 847 | len, 0, hlimit, tclass, opt, &fl, (struct rt6_info*)dst, |
| 848 | msg->msg_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | |
| 850 | if (err) |
| 851 | ip6_flush_pending_frames(sk); |
| 852 | else if (!(msg->msg_flags & MSG_MORE)) |
Herbert Xu | 357b40a | 2005-04-19 22:30:14 -0700 | [diff] [blame] | 853 | err = rawv6_push_pending_frames(sk, &fl, rp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 854 | } |
| 855 | done: |
Nicolas DICHTEL | 6d3e85e | 2006-02-13 15:56:13 -0800 | [diff] [blame] | 856 | dst_release(dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 857 | release_sock(sk); |
| 858 | out: |
| 859 | fl6_sock_release(flowlabel); |
| 860 | return err<0?err:len; |
| 861 | do_confirm: |
| 862 | dst_confirm(dst); |
| 863 | if (!(msg->msg_flags & MSG_PROBE) || len) |
| 864 | goto back_from_confirm; |
| 865 | err = 0; |
| 866 | goto done; |
| 867 | } |
| 868 | |
| 869 | static int rawv6_seticmpfilter(struct sock *sk, int level, int optname, |
| 870 | char __user *optval, int optlen) |
| 871 | { |
| 872 | switch (optname) { |
| 873 | case ICMPV6_FILTER: |
| 874 | if (optlen > sizeof(struct icmp6_filter)) |
| 875 | optlen = sizeof(struct icmp6_filter); |
| 876 | if (copy_from_user(&raw6_sk(sk)->filter, optval, optlen)) |
| 877 | return -EFAULT; |
| 878 | return 0; |
| 879 | default: |
| 880 | return -ENOPROTOOPT; |
| 881 | }; |
| 882 | |
| 883 | return 0; |
| 884 | } |
| 885 | |
| 886 | static int rawv6_geticmpfilter(struct sock *sk, int level, int optname, |
| 887 | char __user *optval, int __user *optlen) |
| 888 | { |
| 889 | int len; |
| 890 | |
| 891 | switch (optname) { |
| 892 | case ICMPV6_FILTER: |
| 893 | if (get_user(len, optlen)) |
| 894 | return -EFAULT; |
| 895 | if (len < 0) |
| 896 | return -EINVAL; |
| 897 | if (len > sizeof(struct icmp6_filter)) |
| 898 | len = sizeof(struct icmp6_filter); |
| 899 | if (put_user(len, optlen)) |
| 900 | return -EFAULT; |
| 901 | if (copy_to_user(optval, &raw6_sk(sk)->filter, len)) |
| 902 | return -EFAULT; |
| 903 | return 0; |
| 904 | default: |
| 905 | return -ENOPROTOOPT; |
| 906 | }; |
| 907 | |
| 908 | return 0; |
| 909 | } |
| 910 | |
| 911 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 912 | static int do_rawv6_setsockopt(struct sock *sk, int level, int optname, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 913 | char __user *optval, int optlen) |
| 914 | { |
| 915 | struct raw6_sock *rp = raw6_sk(sk); |
| 916 | int val; |
| 917 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | if (get_user(val, (int __user *)optval)) |
| 919 | return -EFAULT; |
| 920 | |
| 921 | switch (optname) { |
| 922 | case IPV6_CHECKSUM: |
| 923 | /* You may get strange result with a positive odd offset; |
| 924 | RFC2292bis agrees with me. */ |
| 925 | if (val > 0 && (val&1)) |
| 926 | return(-EINVAL); |
| 927 | if (val < 0) { |
| 928 | rp->checksum = 0; |
| 929 | } else { |
| 930 | rp->checksum = 1; |
| 931 | rp->offset = val; |
| 932 | } |
| 933 | |
| 934 | return 0; |
| 935 | break; |
| 936 | |
| 937 | default: |
| 938 | return(-ENOPROTOOPT); |
| 939 | } |
| 940 | } |
| 941 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 942 | static int rawv6_setsockopt(struct sock *sk, int level, int optname, |
| 943 | char __user *optval, int optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 944 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | switch(level) { |
| 946 | case SOL_RAW: |
| 947 | break; |
| 948 | |
| 949 | case SOL_ICMPV6: |
| 950 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) |
| 951 | return -EOPNOTSUPP; |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 952 | return rawv6_seticmpfilter(sk, level, optname, optval, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | optlen); |
| 954 | case SOL_IPV6: |
| 955 | if (optname == IPV6_CHECKSUM) |
| 956 | break; |
| 957 | default: |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 958 | return ipv6_setsockopt(sk, level, optname, optval, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 959 | optlen); |
| 960 | }; |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 961 | return do_rawv6_setsockopt(sk, level, optname, optval, optlen); |
| 962 | } |
| 963 | |
| 964 | #ifdef CONFIG_COMPAT |
| 965 | static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname, |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 966 | char __user *optval, int optlen) |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 967 | { |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 968 | switch (level) { |
| 969 | case SOL_RAW: |
| 970 | break; |
| 971 | case SOL_ICMPV6: |
| 972 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) |
| 973 | return -EOPNOTSUPP; |
| 974 | return rawv6_seticmpfilter(sk, level, optname, optval, optlen); |
| 975 | case SOL_IPV6: |
| 976 | if (optname == IPV6_CHECKSUM) |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 977 | break; |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 978 | default: |
| 979 | return compat_ipv6_setsockopt(sk, level, optname, |
| 980 | optval, optlen); |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 981 | }; |
| 982 | return do_rawv6_setsockopt(sk, level, optname, optval, optlen); |
| 983 | } |
| 984 | #endif |
| 985 | |
| 986 | static int do_rawv6_getsockopt(struct sock *sk, int level, int optname, |
| 987 | char __user *optval, int __user *optlen) |
| 988 | { |
| 989 | struct raw6_sock *rp = raw6_sk(sk); |
| 990 | int val, len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | |
| 992 | if (get_user(len,optlen)) |
| 993 | return -EFAULT; |
| 994 | |
| 995 | switch (optname) { |
| 996 | case IPV6_CHECKSUM: |
| 997 | if (rp->checksum == 0) |
| 998 | val = -1; |
| 999 | else |
| 1000 | val = rp->offset; |
| 1001 | break; |
| 1002 | |
| 1003 | default: |
| 1004 | return -ENOPROTOOPT; |
| 1005 | } |
| 1006 | |
| 1007 | len = min_t(unsigned int, sizeof(int), len); |
| 1008 | |
| 1009 | if (put_user(len, optlen)) |
| 1010 | return -EFAULT; |
| 1011 | if (copy_to_user(optval,&val,len)) |
| 1012 | return -EFAULT; |
| 1013 | return 0; |
| 1014 | } |
| 1015 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 1016 | static int rawv6_getsockopt(struct sock *sk, int level, int optname, |
| 1017 | char __user *optval, int __user *optlen) |
| 1018 | { |
| 1019 | switch(level) { |
| 1020 | case SOL_RAW: |
| 1021 | break; |
| 1022 | |
| 1023 | case SOL_ICMPV6: |
| 1024 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) |
| 1025 | return -EOPNOTSUPP; |
| 1026 | return rawv6_geticmpfilter(sk, level, optname, optval, |
| 1027 | optlen); |
| 1028 | case SOL_IPV6: |
| 1029 | if (optname == IPV6_CHECKSUM) |
| 1030 | break; |
| 1031 | default: |
| 1032 | return ipv6_getsockopt(sk, level, optname, optval, |
| 1033 | optlen); |
| 1034 | }; |
| 1035 | return do_rawv6_getsockopt(sk, level, optname, optval, optlen); |
| 1036 | } |
| 1037 | |
| 1038 | #ifdef CONFIG_COMPAT |
| 1039 | static int compat_rawv6_getsockopt(struct sock *sk, int level, int optname, |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 1040 | char __user *optval, int __user *optlen) |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 1041 | { |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 1042 | switch (level) { |
| 1043 | case SOL_RAW: |
| 1044 | break; |
| 1045 | case SOL_ICMPV6: |
| 1046 | if (inet_sk(sk)->num != IPPROTO_ICMPV6) |
| 1047 | return -EOPNOTSUPP; |
| 1048 | return rawv6_geticmpfilter(sk, level, optname, optval, optlen); |
| 1049 | case SOL_IPV6: |
| 1050 | if (optname == IPV6_CHECKSUM) |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 1051 | break; |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 1052 | default: |
| 1053 | return compat_ipv6_getsockopt(sk, level, optname, |
| 1054 | optval, optlen); |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 1055 | }; |
| 1056 | return do_rawv6_getsockopt(sk, level, optname, optval, optlen); |
| 1057 | } |
| 1058 | #endif |
| 1059 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1060 | static int rawv6_ioctl(struct sock *sk, int cmd, unsigned long arg) |
| 1061 | { |
| 1062 | switch(cmd) { |
| 1063 | case SIOCOUTQ: |
| 1064 | { |
| 1065 | int amount = atomic_read(&sk->sk_wmem_alloc); |
| 1066 | return put_user(amount, (int __user *)arg); |
| 1067 | } |
| 1068 | case SIOCINQ: |
| 1069 | { |
| 1070 | struct sk_buff *skb; |
| 1071 | int amount = 0; |
| 1072 | |
Herbert Xu | e0f9f85 | 2005-06-18 22:56:18 -0700 | [diff] [blame] | 1073 | spin_lock_bh(&sk->sk_receive_queue.lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1074 | skb = skb_peek(&sk->sk_receive_queue); |
| 1075 | if (skb != NULL) |
| 1076 | amount = skb->tail - skb->h.raw; |
Herbert Xu | e0f9f85 | 2005-06-18 22:56:18 -0700 | [diff] [blame] | 1077 | spin_unlock_bh(&sk->sk_receive_queue.lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1078 | return put_user(amount, (int __user *)arg); |
| 1079 | } |
| 1080 | |
| 1081 | default: |
| 1082 | return -ENOIOCTLCMD; |
| 1083 | } |
| 1084 | } |
| 1085 | |
| 1086 | static void rawv6_close(struct sock *sk, long timeout) |
| 1087 | { |
| 1088 | if (inet_sk(sk)->num == IPPROTO_RAW) |
| 1089 | ip6_ra_control(sk, -1, NULL); |
| 1090 | |
| 1091 | sk_common_release(sk); |
| 1092 | } |
| 1093 | |
| 1094 | static int rawv6_init_sk(struct sock *sk) |
| 1095 | { |
| 1096 | if (inet_sk(sk)->num == IPPROTO_ICMPV6) { |
| 1097 | struct raw6_sock *rp = raw6_sk(sk); |
| 1098 | rp->checksum = 1; |
| 1099 | rp->offset = 2; |
| 1100 | } |
| 1101 | return(0); |
| 1102 | } |
| 1103 | |
| 1104 | struct proto rawv6_prot = { |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 1105 | .name = "RAWv6", |
| 1106 | .owner = THIS_MODULE, |
| 1107 | .close = rawv6_close, |
| 1108 | .connect = ip6_datagram_connect, |
| 1109 | .disconnect = udp_disconnect, |
| 1110 | .ioctl = rawv6_ioctl, |
| 1111 | .init = rawv6_init_sk, |
| 1112 | .destroy = inet6_destroy_sock, |
| 1113 | .setsockopt = rawv6_setsockopt, |
| 1114 | .getsockopt = rawv6_getsockopt, |
| 1115 | .sendmsg = rawv6_sendmsg, |
| 1116 | .recvmsg = rawv6_recvmsg, |
| 1117 | .bind = rawv6_bind, |
| 1118 | .backlog_rcv = rawv6_rcv_skb, |
| 1119 | .hash = raw_v6_hash, |
| 1120 | .unhash = raw_v6_unhash, |
| 1121 | .obj_size = sizeof(struct raw6_sock), |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 1122 | #ifdef CONFIG_COMPAT |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 1123 | .compat_setsockopt = compat_rawv6_setsockopt, |
| 1124 | .compat_getsockopt = compat_rawv6_getsockopt, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 1125 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1126 | }; |
| 1127 | |
| 1128 | #ifdef CONFIG_PROC_FS |
| 1129 | struct raw6_iter_state { |
| 1130 | int bucket; |
| 1131 | }; |
| 1132 | |
| 1133 | #define raw6_seq_private(seq) ((struct raw6_iter_state *)(seq)->private) |
| 1134 | |
| 1135 | static struct sock *raw6_get_first(struct seq_file *seq) |
| 1136 | { |
| 1137 | struct sock *sk; |
| 1138 | struct hlist_node *node; |
| 1139 | struct raw6_iter_state* state = raw6_seq_private(seq); |
| 1140 | |
| 1141 | for (state->bucket = 0; state->bucket < RAWV6_HTABLE_SIZE; ++state->bucket) |
| 1142 | sk_for_each(sk, node, &raw_v6_htable[state->bucket]) |
| 1143 | if (sk->sk_family == PF_INET6) |
| 1144 | goto out; |
| 1145 | sk = NULL; |
| 1146 | out: |
| 1147 | return sk; |
| 1148 | } |
| 1149 | |
| 1150 | static struct sock *raw6_get_next(struct seq_file *seq, struct sock *sk) |
| 1151 | { |
| 1152 | struct raw6_iter_state* state = raw6_seq_private(seq); |
| 1153 | |
| 1154 | do { |
| 1155 | sk = sk_next(sk); |
| 1156 | try_again: |
| 1157 | ; |
| 1158 | } while (sk && sk->sk_family != PF_INET6); |
| 1159 | |
| 1160 | if (!sk && ++state->bucket < RAWV6_HTABLE_SIZE) { |
| 1161 | sk = sk_head(&raw_v6_htable[state->bucket]); |
| 1162 | goto try_again; |
| 1163 | } |
| 1164 | return sk; |
| 1165 | } |
| 1166 | |
| 1167 | static struct sock *raw6_get_idx(struct seq_file *seq, loff_t pos) |
| 1168 | { |
| 1169 | struct sock *sk = raw6_get_first(seq); |
| 1170 | if (sk) |
| 1171 | while (pos && (sk = raw6_get_next(seq, sk)) != NULL) |
| 1172 | --pos; |
| 1173 | return pos ? NULL : sk; |
| 1174 | } |
| 1175 | |
| 1176 | static void *raw6_seq_start(struct seq_file *seq, loff_t *pos) |
| 1177 | { |
| 1178 | read_lock(&raw_v6_lock); |
| 1179 | return *pos ? raw6_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; |
| 1180 | } |
| 1181 | |
| 1182 | static void *raw6_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| 1183 | { |
| 1184 | struct sock *sk; |
| 1185 | |
| 1186 | if (v == SEQ_START_TOKEN) |
| 1187 | sk = raw6_get_first(seq); |
| 1188 | else |
| 1189 | sk = raw6_get_next(seq, v); |
| 1190 | ++*pos; |
| 1191 | return sk; |
| 1192 | } |
| 1193 | |
| 1194 | static void raw6_seq_stop(struct seq_file *seq, void *v) |
| 1195 | { |
| 1196 | read_unlock(&raw_v6_lock); |
| 1197 | } |
| 1198 | |
| 1199 | static void raw6_sock_seq_show(struct seq_file *seq, struct sock *sp, int i) |
| 1200 | { |
| 1201 | struct ipv6_pinfo *np = inet6_sk(sp); |
| 1202 | struct in6_addr *dest, *src; |
| 1203 | __u16 destp, srcp; |
| 1204 | |
| 1205 | dest = &np->daddr; |
| 1206 | src = &np->rcv_saddr; |
| 1207 | destp = 0; |
| 1208 | srcp = inet_sk(sp)->num; |
| 1209 | seq_printf(seq, |
| 1210 | "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " |
| 1211 | "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p\n", |
| 1212 | i, |
| 1213 | src->s6_addr32[0], src->s6_addr32[1], |
| 1214 | src->s6_addr32[2], src->s6_addr32[3], srcp, |
| 1215 | dest->s6_addr32[0], dest->s6_addr32[1], |
| 1216 | dest->s6_addr32[2], dest->s6_addr32[3], destp, |
| 1217 | sp->sk_state, |
| 1218 | atomic_read(&sp->sk_wmem_alloc), |
| 1219 | atomic_read(&sp->sk_rmem_alloc), |
| 1220 | 0, 0L, 0, |
| 1221 | sock_i_uid(sp), 0, |
| 1222 | sock_i_ino(sp), |
| 1223 | atomic_read(&sp->sk_refcnt), sp); |
| 1224 | } |
| 1225 | |
| 1226 | static int raw6_seq_show(struct seq_file *seq, void *v) |
| 1227 | { |
| 1228 | if (v == SEQ_START_TOKEN) |
| 1229 | seq_printf(seq, |
| 1230 | " sl " |
| 1231 | "local_address " |
| 1232 | "remote_address " |
| 1233 | "st tx_queue rx_queue tr tm->when retrnsmt" |
| 1234 | " uid timeout inode\n"); |
| 1235 | else |
| 1236 | raw6_sock_seq_show(seq, v, raw6_seq_private(seq)->bucket); |
| 1237 | return 0; |
| 1238 | } |
| 1239 | |
| 1240 | static struct seq_operations raw6_seq_ops = { |
| 1241 | .start = raw6_seq_start, |
| 1242 | .next = raw6_seq_next, |
| 1243 | .stop = raw6_seq_stop, |
| 1244 | .show = raw6_seq_show, |
| 1245 | }; |
| 1246 | |
| 1247 | static int raw6_seq_open(struct inode *inode, struct file *file) |
| 1248 | { |
| 1249 | struct seq_file *seq; |
| 1250 | int rc = -ENOMEM; |
Ingo Oeser | 0c600ed | 2006-03-20 23:01:32 -0800 | [diff] [blame] | 1251 | struct raw6_iter_state *s = kzalloc(sizeof(*s), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1252 | if (!s) |
| 1253 | goto out; |
| 1254 | rc = seq_open(file, &raw6_seq_ops); |
| 1255 | if (rc) |
| 1256 | goto out_kfree; |
| 1257 | seq = file->private_data; |
| 1258 | seq->private = s; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1259 | out: |
| 1260 | return rc; |
| 1261 | out_kfree: |
| 1262 | kfree(s); |
| 1263 | goto out; |
| 1264 | } |
| 1265 | |
| 1266 | static struct file_operations raw6_seq_fops = { |
| 1267 | .owner = THIS_MODULE, |
| 1268 | .open = raw6_seq_open, |
| 1269 | .read = seq_read, |
| 1270 | .llseek = seq_lseek, |
| 1271 | .release = seq_release_private, |
| 1272 | }; |
| 1273 | |
| 1274 | int __init raw6_proc_init(void) |
| 1275 | { |
| 1276 | if (!proc_net_fops_create("raw6", S_IRUGO, &raw6_seq_fops)) |
| 1277 | return -ENOMEM; |
| 1278 | return 0; |
| 1279 | } |
| 1280 | |
| 1281 | void raw6_proc_exit(void) |
| 1282 | { |
| 1283 | proc_net_remove("raw6"); |
| 1284 | } |
| 1285 | #endif /* CONFIG_PROC_FS */ |