Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * UDP over IPv6 |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 3 | * Linux INET6 implementation |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
| 5 | * Authors: |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * |
| 8 | * Based on linux/ipv4/udp.c |
| 9 | * |
| 10 | * $Id: udp.c,v 1.65 2002/02/01 22:01:04 davem Exp $ |
| 11 | * |
| 12 | * Fixes: |
| 13 | * Hideaki YOSHIFUJI : sin6_scope_id support |
| 14 | * YOSHIFUJI Hideaki @USAGI and: Support IPV6_V6ONLY socket option, which |
| 15 | * Alexey Kuznetsov allow both IPv4 and IPv6 sockets to bind |
| 16 | * a single port at the same time. |
| 17 | * Kazunori MIYAZAWA @USAGI: change process style to use ip6_append_data |
| 18 | * YOSHIFUJI Hideaki @USAGI: convert /proc/net/udp6 to seq_file. |
| 19 | * |
| 20 | * This program is free software; you can redistribute it and/or |
| 21 | * modify it under the terms of the GNU General Public License |
| 22 | * as published by the Free Software Foundation; either version |
| 23 | * 2 of the License, or (at your option) any later version. |
| 24 | */ |
| 25 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include <linux/errno.h> |
| 27 | #include <linux/types.h> |
| 28 | #include <linux/socket.h> |
| 29 | #include <linux/sockios.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <linux/net.h> |
| 31 | #include <linux/in6.h> |
| 32 | #include <linux/netdevice.h> |
| 33 | #include <linux/if_arp.h> |
| 34 | #include <linux/ipv6.h> |
| 35 | #include <linux/icmpv6.h> |
| 36 | #include <linux/init.h> |
Herbert Xu | 3305b80 | 2005-12-13 23:16:37 -0800 | [diff] [blame] | 37 | #include <linux/skbuff.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include <asm/uaccess.h> |
| 39 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #include <net/ndisc.h> |
| 41 | #include <net/protocol.h> |
| 42 | #include <net/transp_v6.h> |
| 43 | #include <net/ip6_route.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #include <net/raw.h> |
Arnaldo Carvalho de Melo | c752f07 | 2005-08-09 20:08:28 -0700 | [diff] [blame] | 45 | #include <net/tcp_states.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | #include <net/ip6_checksum.h> |
| 47 | #include <net/xfrm.h> |
| 48 | |
| 49 | #include <linux/proc_fs.h> |
| 50 | #include <linux/seq_file.h> |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 51 | #include "udp_impl.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
Eric Dumazet | ba89966 | 2005-08-26 12:05:31 -0700 | [diff] [blame] | 53 | DEFINE_SNMP_STAT(struct udp_mib, udp_stats_in6) __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | |
Gerrit Renker | 25030a7 | 2006-08-26 20:06:05 -0700 | [diff] [blame] | 55 | static inline int udp_v6_get_port(struct sock *sk, unsigned short snum) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | { |
Gerrit Renker | 25030a7 | 2006-08-26 20:06:05 -0700 | [diff] [blame] | 57 | return udp_get_port(sk, snum, ipv6_rcv_saddr_equal); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | } |
| 59 | |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 60 | static struct sock *__udp6_lib_lookup(struct in6_addr *saddr, __be16 sport, |
| 61 | struct in6_addr *daddr, __be16 dport, |
| 62 | int dif, struct hlist_head udptable[]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | { |
| 64 | struct sock *sk, *result = NULL; |
| 65 | struct hlist_node *node; |
| 66 | unsigned short hnum = ntohs(dport); |
| 67 | int badness = -1; |
| 68 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 69 | read_lock(&udp_hash_lock); |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 70 | sk_for_each(sk, node, &udptable[hnum & (UDP_HTABLE_SIZE - 1)]) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | struct inet_sock *inet = inet_sk(sk); |
| 72 | |
Eric Dumazet | 95f30b3 | 2007-02-09 15:44:52 -0800 | [diff] [blame] | 73 | if (sk->sk_hash == hnum && sk->sk_family == PF_INET6) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | struct ipv6_pinfo *np = inet6_sk(sk); |
| 75 | int score = 0; |
| 76 | if (inet->dport) { |
| 77 | if (inet->dport != sport) |
| 78 | continue; |
| 79 | score++; |
| 80 | } |
| 81 | if (!ipv6_addr_any(&np->rcv_saddr)) { |
| 82 | if (!ipv6_addr_equal(&np->rcv_saddr, daddr)) |
| 83 | continue; |
| 84 | score++; |
| 85 | } |
| 86 | if (!ipv6_addr_any(&np->daddr)) { |
| 87 | if (!ipv6_addr_equal(&np->daddr, saddr)) |
| 88 | continue; |
| 89 | score++; |
| 90 | } |
| 91 | if (sk->sk_bound_dev_if) { |
| 92 | if (sk->sk_bound_dev_if != dif) |
| 93 | continue; |
| 94 | score++; |
| 95 | } |
| 96 | if(score == 4) { |
| 97 | result = sk; |
| 98 | break; |
| 99 | } else if(score > badness) { |
| 100 | result = sk; |
| 101 | badness = score; |
| 102 | } |
| 103 | } |
| 104 | } |
| 105 | if (result) |
| 106 | sock_hold(result); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 107 | read_unlock(&udp_hash_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | return result; |
| 109 | } |
| 110 | |
| 111 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | * This should be easy, if there is something there we |
| 113 | * return it, otherwise we block. |
| 114 | */ |
| 115 | |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 116 | int udpv6_recvmsg(struct kiocb *iocb, struct sock *sk, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | struct msghdr *msg, size_t len, |
| 118 | int noblock, int flags, int *addr_len) |
| 119 | { |
| 120 | struct ipv6_pinfo *np = inet6_sk(sk); |
| 121 | struct inet_sock *inet = inet_sk(sk); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 122 | struct sk_buff *skb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | size_t copied; |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 124 | int err, copy_only, is_udplite = IS_UDPLITE(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 126 | if (addr_len) |
| 127 | *addr_len=sizeof(struct sockaddr_in6); |
| 128 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | if (flags & MSG_ERRQUEUE) |
| 130 | return ipv6_recv_error(sk, msg, len); |
| 131 | |
| 132 | try_again: |
| 133 | skb = skb_recv_datagram(sk, flags, noblock, &err); |
| 134 | if (!skb) |
| 135 | goto out; |
| 136 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 137 | copied = skb->len - sizeof(struct udphdr); |
| 138 | if (copied > len) { |
| 139 | copied = len; |
| 140 | msg->msg_flags |= MSG_TRUNC; |
| 141 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 143 | /* |
| 144 | * Decide whether to checksum and/or copy data. |
| 145 | */ |
| 146 | copy_only = (skb->ip_summed==CHECKSUM_UNNECESSARY); |
| 147 | |
| 148 | if (is_udplite || (!copy_only && msg->msg_flags&MSG_TRUNC)) { |
| 149 | if (__udp_lib_checksum_complete(skb)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | goto csum_copy_err; |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 151 | copy_only = 1; |
| 152 | } |
| 153 | |
| 154 | if (copy_only) |
| 155 | err = skb_copy_datagram_iovec(skb, sizeof(struct udphdr), |
| 156 | msg->msg_iov, copied ); |
| 157 | else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | err = skb_copy_and_csum_datagram_iovec(skb, sizeof(struct udphdr), msg->msg_iov); |
| 159 | if (err == -EINVAL) |
| 160 | goto csum_copy_err; |
| 161 | } |
| 162 | if (err) |
| 163 | goto out_free; |
| 164 | |
| 165 | sock_recv_timestamp(msg, sk, skb); |
| 166 | |
| 167 | /* Copy the address. */ |
| 168 | if (msg->msg_name) { |
| 169 | struct sockaddr_in6 *sin6; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 170 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | sin6 = (struct sockaddr_in6 *) msg->msg_name; |
| 172 | sin6->sin6_family = AF_INET6; |
| 173 | sin6->sin6_port = skb->h.uh->source; |
| 174 | sin6->sin6_flowinfo = 0; |
| 175 | sin6->sin6_scope_id = 0; |
| 176 | |
| 177 | if (skb->protocol == htons(ETH_P_IP)) |
| 178 | ipv6_addr_set(&sin6->sin6_addr, 0, 0, |
| 179 | htonl(0xffff), skb->nh.iph->saddr); |
| 180 | else { |
| 181 | ipv6_addr_copy(&sin6->sin6_addr, &skb->nh.ipv6h->saddr); |
| 182 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) |
| 183 | sin6->sin6_scope_id = IP6CB(skb)->iif; |
| 184 | } |
| 185 | |
| 186 | } |
| 187 | if (skb->protocol == htons(ETH_P_IP)) { |
| 188 | if (inet->cmsg_flags) |
| 189 | ip_cmsg_recv(msg, skb); |
| 190 | } else { |
| 191 | if (np->rxopt.all) |
| 192 | datagram_recv_ctl(sk, msg, skb); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 193 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | |
| 195 | err = copied; |
| 196 | if (flags & MSG_TRUNC) |
| 197 | err = skb->len - sizeof(struct udphdr); |
| 198 | |
| 199 | out_free: |
| 200 | skb_free_datagram(sk, skb); |
| 201 | out: |
| 202 | return err; |
| 203 | |
| 204 | csum_copy_err: |
Herbert Xu | 3305b80 | 2005-12-13 23:16:37 -0800 | [diff] [blame] | 205 | skb_kill_datagram(sk, skb, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | |
| 207 | if (flags & MSG_DONTWAIT) { |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 208 | UDP6_INC_STATS_USER(UDP_MIB_INERRORS, is_udplite); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | return -EAGAIN; |
| 210 | } |
| 211 | goto try_again; |
| 212 | } |
| 213 | |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 214 | void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt, |
| 215 | int type, int code, int offset, __be32 info, |
| 216 | struct hlist_head udptable[] ) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | { |
| 218 | struct ipv6_pinfo *np; |
| 219 | struct ipv6hdr *hdr = (struct ipv6hdr*)skb->data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | struct in6_addr *saddr = &hdr->saddr; |
| 221 | struct in6_addr *daddr = &hdr->daddr; |
| 222 | struct udphdr *uh = (struct udphdr*)(skb->data+offset); |
| 223 | struct sock *sk; |
| 224 | int err; |
| 225 | |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 226 | sk = __udp6_lib_lookup(daddr, uh->dest, |
| 227 | saddr, uh->source, inet6_iif(skb), udptable); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | if (sk == NULL) |
| 229 | return; |
| 230 | |
| 231 | np = inet6_sk(sk); |
| 232 | |
| 233 | if (!icmpv6_err_convert(type, code, &err) && !np->recverr) |
| 234 | goto out; |
| 235 | |
| 236 | if (sk->sk_state != TCP_ESTABLISHED && !np->recverr) |
| 237 | goto out; |
| 238 | |
| 239 | if (np->recverr) |
| 240 | ipv6_icmp_error(sk, skb, err, uh->dest, ntohl(info), (u8 *)(uh+1)); |
| 241 | |
| 242 | sk->sk_err = err; |
| 243 | sk->sk_error_report(sk); |
| 244 | out: |
| 245 | sock_put(sk); |
| 246 | } |
| 247 | |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 248 | static __inline__ void udpv6_err(struct sk_buff *skb, |
| 249 | struct inet6_skb_parm *opt, int type, |
Al Viro | 8e5200f | 2006-11-20 18:06:37 -0800 | [diff] [blame] | 250 | int code, int offset, __be32 info ) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | { |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 252 | return __udp6_lib_err(skb, opt, type, code, offset, info, udp_hash); |
| 253 | } |
| 254 | |
| 255 | int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb) |
| 256 | { |
| 257 | struct udp_sock *up = udp_sk(sk); |
David S. Miller | a18135e | 2006-08-15 00:00:09 -0700 | [diff] [blame] | 258 | int rc; |
| 259 | |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 260 | if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) |
| 261 | goto drop; |
| 262 | |
| 263 | /* |
| 264 | * UDP-Lite specific tests, ignored on UDP sockets (see net/ipv4/udp.c). |
| 265 | */ |
| 266 | if ((up->pcflag & UDPLITE_RECV_CC) && UDP_SKB_CB(skb)->partial_cov) { |
| 267 | |
| 268 | if (up->pcrlen == 0) { /* full coverage was set */ |
| 269 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: partial coverage" |
| 270 | " %d while full coverage %d requested\n", |
| 271 | UDP_SKB_CB(skb)->cscov, skb->len); |
| 272 | goto drop; |
| 273 | } |
| 274 | if (UDP_SKB_CB(skb)->cscov < up->pcrlen) { |
| 275 | LIMIT_NETDEBUG(KERN_WARNING "UDPLITE6: coverage %d " |
| 276 | "too small, need min %d\n", |
| 277 | UDP_SKB_CB(skb)->cscov, up->pcrlen); |
| 278 | goto drop; |
| 279 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | } |
| 281 | |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 282 | if (udp_lib_checksum_complete(skb)) |
| 283 | goto drop; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | |
David S. Miller | a18135e | 2006-08-15 00:00:09 -0700 | [diff] [blame] | 285 | if ((rc = sock_queue_rcv_skb(sk,skb)) < 0) { |
| 286 | /* Note that an ENOMEM error is charged twice */ |
| 287 | if (rc == -ENOMEM) |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 288 | UDP6_INC_STATS_BH(UDP_MIB_RCVBUFERRORS, up->pcflag); |
| 289 | goto drop; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | } |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 291 | UDP6_INC_STATS_BH(UDP_MIB_INDATAGRAMS, up->pcflag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | return 0; |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 293 | drop: |
| 294 | UDP6_INC_STATS_BH(UDP_MIB_INERRORS, up->pcflag); |
| 295 | kfree_skb(skb); |
| 296 | return -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | } |
| 298 | |
| 299 | static struct sock *udp_v6_mcast_next(struct sock *sk, |
Al Viro | e69a4ad | 2006-11-14 20:56:00 -0800 | [diff] [blame] | 300 | __be16 loc_port, struct in6_addr *loc_addr, |
| 301 | __be16 rmt_port, struct in6_addr *rmt_addr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | int dif) |
| 303 | { |
| 304 | struct hlist_node *node; |
| 305 | struct sock *s = sk; |
| 306 | unsigned short num = ntohs(loc_port); |
| 307 | |
| 308 | sk_for_each_from(s, node) { |
| 309 | struct inet_sock *inet = inet_sk(s); |
| 310 | |
Eric Dumazet | 95f30b3 | 2007-02-09 15:44:52 -0800 | [diff] [blame] | 311 | if (s->sk_hash == num && s->sk_family == PF_INET6) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | struct ipv6_pinfo *np = inet6_sk(s); |
| 313 | if (inet->dport) { |
| 314 | if (inet->dport != rmt_port) |
| 315 | continue; |
| 316 | } |
| 317 | if (!ipv6_addr_any(&np->daddr) && |
| 318 | !ipv6_addr_equal(&np->daddr, rmt_addr)) |
| 319 | continue; |
| 320 | |
| 321 | if (s->sk_bound_dev_if && s->sk_bound_dev_if != dif) |
| 322 | continue; |
| 323 | |
| 324 | if (!ipv6_addr_any(&np->rcv_saddr)) { |
David L Stevens | 40796c5 | 2005-09-14 21:10:20 -0700 | [diff] [blame] | 325 | if (!ipv6_addr_equal(&np->rcv_saddr, loc_addr)) |
| 326 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | } |
| 328 | if(!inet6_mc_check(s, loc_addr, rmt_addr)) |
| 329 | continue; |
| 330 | return s; |
| 331 | } |
| 332 | } |
| 333 | return NULL; |
| 334 | } |
| 335 | |
| 336 | /* |
| 337 | * Note: called only from the BH handler context, |
| 338 | * so we don't need to lock the hashes. |
| 339 | */ |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 340 | static int __udp6_lib_mcast_deliver(struct sk_buff *skb, struct in6_addr *saddr, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 341 | struct in6_addr *daddr, struct hlist_head udptable[]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | { |
| 343 | struct sock *sk, *sk2; |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 344 | const struct udphdr *uh = skb->h.uh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | int dif; |
| 346 | |
| 347 | read_lock(&udp_hash_lock); |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 348 | sk = sk_head(&udptable[ntohs(uh->dest) & (UDP_HTABLE_SIZE - 1)]); |
YOSHIFUJI Hideaki | f2776ff | 2006-11-21 17:41:56 -0800 | [diff] [blame] | 349 | dif = inet6_iif(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | sk = udp_v6_mcast_next(sk, uh->dest, daddr, uh->source, saddr, dif); |
| 351 | if (!sk) { |
| 352 | kfree_skb(skb); |
| 353 | goto out; |
| 354 | } |
| 355 | |
| 356 | sk2 = sk; |
| 357 | while ((sk2 = udp_v6_mcast_next(sk_next(sk2), uh->dest, daddr, |
| 358 | uh->source, saddr, dif))) { |
| 359 | struct sk_buff *buff = skb_clone(skb, GFP_ATOMIC); |
| 360 | if (buff) |
| 361 | udpv6_queue_rcv_skb(sk2, buff); |
| 362 | } |
| 363 | udpv6_queue_rcv_skb(sk, skb); |
| 364 | out: |
| 365 | read_unlock(&udp_hash_lock); |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 366 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | } |
| 368 | |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 369 | static inline int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh) |
| 370 | |
| 371 | { |
| 372 | if (uh->check == 0) { |
| 373 | /* RFC 2460 section 8.1 says that we SHOULD log |
| 374 | this error. Well, it is reasonable. |
| 375 | */ |
| 376 | LIMIT_NETDEBUG(KERN_INFO "IPv6: udp checksum is 0\n"); |
| 377 | return 1; |
| 378 | } |
| 379 | if (skb->ip_summed == CHECKSUM_COMPLETE && |
| 380 | !csum_ipv6_magic(&skb->nh.ipv6h->saddr, &skb->nh.ipv6h->daddr, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 381 | skb->len, IPPROTO_UDP, skb->csum )) |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 382 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 383 | |
| 384 | if (skb->ip_summed != CHECKSUM_UNNECESSARY) |
Al Viro | 868c86b | 2006-11-14 21:35:48 -0800 | [diff] [blame] | 385 | skb->csum = ~csum_unfold(csum_ipv6_magic(&skb->nh.ipv6h->saddr, |
| 386 | &skb->nh.ipv6h->daddr, |
David S. Miller | 7d9e9b3 | 2006-11-14 22:09:20 -0800 | [diff] [blame] | 387 | skb->len, IPPROTO_UDP, |
Al Viro | 868c86b | 2006-11-14 21:35:48 -0800 | [diff] [blame] | 388 | 0)); |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 389 | |
| 390 | return (UDP_SKB_CB(skb)->partial_cov = 0); |
| 391 | } |
| 392 | |
| 393 | int __udp6_lib_rcv(struct sk_buff **pskb, struct hlist_head udptable[], |
| 394 | int is_udplite) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | { |
| 396 | struct sk_buff *skb = *pskb; |
| 397 | struct sock *sk; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 398 | struct udphdr *uh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | struct net_device *dev = skb->dev; |
| 400 | struct in6_addr *saddr, *daddr; |
| 401 | u32 ulen = 0; |
| 402 | |
| 403 | if (!pskb_may_pull(skb, sizeof(struct udphdr))) |
| 404 | goto short_packet; |
| 405 | |
| 406 | saddr = &skb->nh.ipv6h->saddr; |
| 407 | daddr = &skb->nh.ipv6h->daddr; |
| 408 | uh = skb->h.uh; |
| 409 | |
| 410 | ulen = ntohs(uh->len); |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 411 | if (ulen > skb->len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | goto short_packet; |
| 413 | |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 414 | if(! is_udplite ) { /* UDP validates ulen. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 416 | /* Check for jumbo payload */ |
| 417 | if (ulen == 0) |
| 418 | ulen = skb->len; |
| 419 | |
| 420 | if (ulen < sizeof(*uh)) |
| 421 | goto short_packet; |
| 422 | |
| 423 | if (ulen < skb->len) { |
| 424 | if (pskb_trim_rcsum(skb, ulen)) |
| 425 | goto short_packet; |
| 426 | saddr = &skb->nh.ipv6h->saddr; |
| 427 | daddr = &skb->nh.ipv6h->daddr; |
| 428 | uh = skb->h.uh; |
| 429 | } |
| 430 | |
| 431 | if (udp6_csum_init(skb, uh)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | goto discard; |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 433 | |
| 434 | } else { /* UDP-Lite validates cscov. */ |
| 435 | if (udplite6_csum_init(skb, uh)) |
| 436 | goto discard; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | } |
| 438 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 439 | /* |
| 440 | * Multicast receive code |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | */ |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 442 | if (ipv6_addr_is_multicast(daddr)) |
| 443 | return __udp6_lib_mcast_deliver(skb, saddr, daddr, udptable); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | |
| 445 | /* Unicast */ |
| 446 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 447 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | * check socket cache ... must talk to Alan about his plans |
| 449 | * for sock caches... i'll skip this for now. |
| 450 | */ |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 451 | sk = __udp6_lib_lookup(saddr, uh->source, |
| 452 | daddr, uh->dest, inet6_iif(skb), udptable); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | |
| 454 | if (sk == NULL) { |
| 455 | if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) |
| 456 | goto discard; |
| 457 | |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 458 | if (udp_lib_checksum_complete(skb)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | goto discard; |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 460 | UDP6_INC_STATS_BH(UDP_MIB_NOPORTS, is_udplite); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | |
| 462 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0, dev); |
| 463 | |
| 464 | kfree_skb(skb); |
| 465 | return(0); |
| 466 | } |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 467 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | /* deliver */ |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 469 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | udpv6_queue_rcv_skb(sk, skb); |
| 471 | sock_put(sk); |
| 472 | return(0); |
| 473 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 474 | short_packet: |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 475 | LIMIT_NETDEBUG(KERN_DEBUG "UDP%sv6: short packet: %d/%u\n", |
| 476 | is_udplite? "-Lite" : "", ulen, skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | |
| 478 | discard: |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 479 | UDP6_INC_STATS_BH(UDP_MIB_INERRORS, is_udplite); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | kfree_skb(skb); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 481 | return(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | } |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 483 | |
| 484 | static __inline__ int udpv6_rcv(struct sk_buff **pskb) |
| 485 | { |
| 486 | return __udp6_lib_rcv(pskb, udp_hash, 0); |
| 487 | } |
| 488 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | /* |
| 490 | * Throw away all pending data and cancel the corking. Socket is locked. |
| 491 | */ |
| 492 | static void udp_v6_flush_pending_frames(struct sock *sk) |
| 493 | { |
| 494 | struct udp_sock *up = udp_sk(sk); |
| 495 | |
| 496 | if (up->pending) { |
| 497 | up->len = 0; |
| 498 | up->pending = 0; |
| 499 | ip6_flush_pending_frames(sk); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 500 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | } |
| 502 | |
| 503 | /* |
| 504 | * Sending |
| 505 | */ |
| 506 | |
Gerrit Renker | 4c0a6cb | 2006-11-27 09:29:59 -0800 | [diff] [blame] | 507 | static int udp_v6_push_pending_frames(struct sock *sk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | { |
| 509 | struct sk_buff *skb; |
| 510 | struct udphdr *uh; |
Gerrit Renker | 4c0a6cb | 2006-11-27 09:29:59 -0800 | [diff] [blame] | 511 | struct udp_sock *up = udp_sk(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | struct inet_sock *inet = inet_sk(sk); |
| 513 | struct flowi *fl = &inet->cork.fl; |
| 514 | int err = 0; |
Al Viro | 868c86b | 2006-11-14 21:35:48 -0800 | [diff] [blame] | 515 | __wsum csum = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | |
| 517 | /* Grab the skbuff where UDP header space exists. */ |
| 518 | if ((skb = skb_peek(&sk->sk_write_queue)) == NULL) |
| 519 | goto out; |
| 520 | |
| 521 | /* |
| 522 | * Create a UDP header |
| 523 | */ |
| 524 | uh = skb->h.uh; |
| 525 | uh->source = fl->fl_ip_sport; |
| 526 | uh->dest = fl->fl_ip_dport; |
| 527 | uh->len = htons(up->len); |
| 528 | uh->check = 0; |
| 529 | |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 530 | if (up->pcflag) |
| 531 | csum = udplite_csum_outgoing(sk, skb); |
| 532 | else |
| 533 | csum = udp_csum_outgoing(sk, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 535 | /* add protocol-dependent pseudo-header */ |
| 536 | uh->check = csum_ipv6_magic(&fl->fl6_src, &fl->fl6_dst, |
| 537 | up->len, fl->proto, csum ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | if (uh->check == 0) |
Al Viro | f6ab028 | 2006-11-16 02:36:50 -0800 | [diff] [blame] | 539 | uh->check = CSUM_MANGLED_0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | err = ip6_push_pending_frames(sk); |
| 542 | out: |
| 543 | up->len = 0; |
| 544 | up->pending = 0; |
| 545 | return err; |
| 546 | } |
| 547 | |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 548 | int udpv6_sendmsg(struct kiocb *iocb, struct sock *sk, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | struct msghdr *msg, size_t len) |
| 550 | { |
| 551 | struct ipv6_txoptions opt_space; |
| 552 | struct udp_sock *up = udp_sk(sk); |
| 553 | struct inet_sock *inet = inet_sk(sk); |
| 554 | struct ipv6_pinfo *np = inet6_sk(sk); |
| 555 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) msg->msg_name; |
| 556 | struct in6_addr *daddr, *final_p = NULL, final; |
| 557 | struct ipv6_txoptions *opt = NULL; |
| 558 | struct ip6_flowlabel *flowlabel = NULL; |
Herbert Xu | 132a55f | 2006-10-03 14:34:00 -0700 | [diff] [blame] | 559 | struct flowi fl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | struct dst_entry *dst; |
| 561 | int addr_len = msg->msg_namelen; |
| 562 | int ulen = len; |
| 563 | int hlimit = -1; |
YOSHIFUJI Hideaki | 41a1f8e | 2005-09-08 10:19:03 +0900 | [diff] [blame] | 564 | int tclass = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | int corkreq = up->corkflag || msg->msg_flags&MSG_MORE; |
| 566 | int err; |
Mitsuru KANDA | 987905d | 2005-09-18 00:30:08 -0700 | [diff] [blame] | 567 | int connected = 0; |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 568 | int is_udplite = up->pcflag; |
| 569 | int (*getfrag)(void *, char *, int, int, int, struct sk_buff *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | |
| 571 | /* destination address check */ |
| 572 | if (sin6) { |
| 573 | if (addr_len < offsetof(struct sockaddr, sa_data)) |
| 574 | return -EINVAL; |
| 575 | |
| 576 | switch (sin6->sin6_family) { |
| 577 | case AF_INET6: |
| 578 | if (addr_len < SIN6_LEN_RFC2133) |
| 579 | return -EINVAL; |
| 580 | daddr = &sin6->sin6_addr; |
| 581 | break; |
| 582 | case AF_INET: |
| 583 | goto do_udp_sendmsg; |
| 584 | case AF_UNSPEC: |
| 585 | msg->msg_name = sin6 = NULL; |
| 586 | msg->msg_namelen = addr_len = 0; |
| 587 | daddr = NULL; |
| 588 | break; |
| 589 | default: |
| 590 | return -EINVAL; |
| 591 | } |
| 592 | } else if (!up->pending) { |
| 593 | if (sk->sk_state != TCP_ESTABLISHED) |
| 594 | return -EDESTADDRREQ; |
| 595 | daddr = &np->daddr; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 596 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | daddr = NULL; |
| 598 | |
| 599 | if (daddr) { |
| 600 | if (ipv6_addr_type(daddr) == IPV6_ADDR_MAPPED) { |
| 601 | struct sockaddr_in sin; |
| 602 | sin.sin_family = AF_INET; |
| 603 | sin.sin_port = sin6 ? sin6->sin6_port : inet->dport; |
| 604 | sin.sin_addr.s_addr = daddr->s6_addr32[3]; |
| 605 | msg->msg_name = &sin; |
| 606 | msg->msg_namelen = sizeof(sin); |
| 607 | do_udp_sendmsg: |
| 608 | if (__ipv6_only_sock(sk)) |
| 609 | return -ENETUNREACH; |
| 610 | return udp_sendmsg(iocb, sk, msg, len); |
| 611 | } |
| 612 | } |
| 613 | |
| 614 | if (up->pending == AF_INET) |
| 615 | return udp_sendmsg(iocb, sk, msg, len); |
| 616 | |
| 617 | /* Rough check on arithmetic overflow, |
| 618 | better check is made in ip6_build_xmit |
| 619 | */ |
| 620 | if (len > INT_MAX - sizeof(struct udphdr)) |
| 621 | return -EMSGSIZE; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 622 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | if (up->pending) { |
| 624 | /* |
| 625 | * There are pending frames. |
| 626 | * The socket lock must be held while it's corked. |
| 627 | */ |
| 628 | lock_sock(sk); |
| 629 | if (likely(up->pending)) { |
| 630 | if (unlikely(up->pending != AF_INET6)) { |
| 631 | release_sock(sk); |
| 632 | return -EAFNOSUPPORT; |
| 633 | } |
| 634 | dst = NULL; |
| 635 | goto do_append_data; |
| 636 | } |
| 637 | release_sock(sk); |
| 638 | } |
| 639 | ulen += sizeof(struct udphdr); |
| 640 | |
Herbert Xu | 132a55f | 2006-10-03 14:34:00 -0700 | [diff] [blame] | 641 | memset(&fl, 0, sizeof(fl)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | |
| 643 | if (sin6) { |
| 644 | if (sin6->sin6_port == 0) |
| 645 | return -EINVAL; |
| 646 | |
Herbert Xu | 132a55f | 2006-10-03 14:34:00 -0700 | [diff] [blame] | 647 | fl.fl_ip_dport = sin6->sin6_port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | daddr = &sin6->sin6_addr; |
| 649 | |
| 650 | if (np->sndflow) { |
Herbert Xu | 132a55f | 2006-10-03 14:34:00 -0700 | [diff] [blame] | 651 | fl.fl6_flowlabel = sin6->sin6_flowinfo&IPV6_FLOWINFO_MASK; |
| 652 | if (fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) { |
| 653 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | if (flowlabel == NULL) |
| 655 | return -EINVAL; |
| 656 | daddr = &flowlabel->dst; |
| 657 | } |
| 658 | } |
| 659 | |
| 660 | /* |
| 661 | * Otherwise it will be difficult to maintain |
| 662 | * sk->sk_dst_cache. |
| 663 | */ |
| 664 | if (sk->sk_state == TCP_ESTABLISHED && |
| 665 | ipv6_addr_equal(daddr, &np->daddr)) |
| 666 | daddr = &np->daddr; |
| 667 | |
| 668 | if (addr_len >= sizeof(struct sockaddr_in6) && |
| 669 | sin6->sin6_scope_id && |
| 670 | ipv6_addr_type(daddr)&IPV6_ADDR_LINKLOCAL) |
Herbert Xu | 132a55f | 2006-10-03 14:34:00 -0700 | [diff] [blame] | 671 | fl.oif = sin6->sin6_scope_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | } else { |
| 673 | if (sk->sk_state != TCP_ESTABLISHED) |
| 674 | return -EDESTADDRREQ; |
| 675 | |
Herbert Xu | 132a55f | 2006-10-03 14:34:00 -0700 | [diff] [blame] | 676 | fl.fl_ip_dport = inet->dport; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | daddr = &np->daddr; |
Herbert Xu | 132a55f | 2006-10-03 14:34:00 -0700 | [diff] [blame] | 678 | fl.fl6_flowlabel = np->flow_label; |
Mitsuru KANDA | 987905d | 2005-09-18 00:30:08 -0700 | [diff] [blame] | 679 | connected = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | } |
| 681 | |
Herbert Xu | 132a55f | 2006-10-03 14:34:00 -0700 | [diff] [blame] | 682 | if (!fl.oif) |
| 683 | fl.oif = sk->sk_bound_dev_if; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | |
| 685 | if (msg->msg_controllen) { |
| 686 | opt = &opt_space; |
| 687 | memset(opt, 0, sizeof(struct ipv6_txoptions)); |
| 688 | opt->tot_len = sizeof(*opt); |
| 689 | |
Herbert Xu | 132a55f | 2006-10-03 14:34:00 -0700 | [diff] [blame] | 690 | err = datagram_send_ctl(msg, &fl, opt, &hlimit, &tclass); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 691 | if (err < 0) { |
| 692 | fl6_sock_release(flowlabel); |
| 693 | return err; |
| 694 | } |
Herbert Xu | 132a55f | 2006-10-03 14:34:00 -0700 | [diff] [blame] | 695 | if ((fl.fl6_flowlabel&IPV6_FLOWLABEL_MASK) && !flowlabel) { |
| 696 | flowlabel = fl6_sock_lookup(sk, fl.fl6_flowlabel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 697 | if (flowlabel == NULL) |
| 698 | return -EINVAL; |
| 699 | } |
| 700 | if (!(opt->opt_nflen|opt->opt_flen)) |
| 701 | opt = NULL; |
Mitsuru KANDA | 987905d | 2005-09-18 00:30:08 -0700 | [diff] [blame] | 702 | connected = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | } |
| 704 | if (opt == NULL) |
| 705 | opt = np->opt; |
YOSHIFUJI Hideaki | df9890c | 2005-11-20 12:23:18 +0900 | [diff] [blame] | 706 | if (flowlabel) |
| 707 | opt = fl6_merge_options(&opt_space, flowlabel, opt); |
| 708 | opt = ipv6_fixup_options(&opt_space, opt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 709 | |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 710 | fl.proto = sk->sk_protocol; |
Herbert Xu | 132a55f | 2006-10-03 14:34:00 -0700 | [diff] [blame] | 711 | ipv6_addr_copy(&fl.fl6_dst, daddr); |
| 712 | if (ipv6_addr_any(&fl.fl6_src) && !ipv6_addr_any(&np->saddr)) |
| 713 | ipv6_addr_copy(&fl.fl6_src, &np->saddr); |
| 714 | fl.fl_ip_sport = inet->sport; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 715 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | /* merge ip6_build_xmit from ip6_output */ |
| 717 | if (opt && opt->srcrt) { |
| 718 | struct rt0_hdr *rt0 = (struct rt0_hdr *) opt->srcrt; |
Herbert Xu | 132a55f | 2006-10-03 14:34:00 -0700 | [diff] [blame] | 719 | ipv6_addr_copy(&final, &fl.fl6_dst); |
| 720 | ipv6_addr_copy(&fl.fl6_dst, rt0->addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 721 | final_p = &final; |
Mitsuru KANDA | 987905d | 2005-09-18 00:30:08 -0700 | [diff] [blame] | 722 | connected = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | } |
| 724 | |
Herbert Xu | 132a55f | 2006-10-03 14:34:00 -0700 | [diff] [blame] | 725 | if (!fl.oif && ipv6_addr_is_multicast(&fl.fl6_dst)) { |
| 726 | fl.oif = np->mcast_oif; |
Mitsuru KANDA | 987905d | 2005-09-18 00:30:08 -0700 | [diff] [blame] | 727 | connected = 0; |
| 728 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 729 | |
Herbert Xu | 132a55f | 2006-10-03 14:34:00 -0700 | [diff] [blame] | 730 | security_sk_classify_flow(sk, &fl); |
Venkat Yekkirala | beb8d13 | 2006-08-04 23:12:42 -0700 | [diff] [blame] | 731 | |
Herbert Xu | 132a55f | 2006-10-03 14:34:00 -0700 | [diff] [blame] | 732 | err = ip6_sk_dst_lookup(sk, &dst, &fl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 733 | if (err) |
| 734 | goto out; |
| 735 | if (final_p) |
Herbert Xu | 132a55f | 2006-10-03 14:34:00 -0700 | [diff] [blame] | 736 | ipv6_addr_copy(&fl.fl6_dst, final_p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | |
David S. Miller | 8eb9086 | 2007-02-08 02:09:21 -0800 | [diff] [blame] | 738 | if ((err = xfrm_lookup(&dst, &fl, sk, 1)) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | |
| 741 | if (hlimit < 0) { |
Herbert Xu | 132a55f | 2006-10-03 14:34:00 -0700 | [diff] [blame] | 742 | if (ipv6_addr_is_multicast(&fl.fl6_dst)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | hlimit = np->mcast_hops; |
| 744 | else |
| 745 | hlimit = np->hop_limit; |
| 746 | if (hlimit < 0) |
| 747 | hlimit = dst_metric(dst, RTAX_HOPLIMIT); |
| 748 | if (hlimit < 0) |
| 749 | hlimit = ipv6_get_hoplimit(dst->dev); |
| 750 | } |
| 751 | |
YOSHIFUJI Hideaki | 41a1f8e | 2005-09-08 10:19:03 +0900 | [diff] [blame] | 752 | if (tclass < 0) { |
| 753 | tclass = np->tclass; |
| 754 | if (tclass < 0) |
| 755 | tclass = 0; |
| 756 | } |
| 757 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | if (msg->msg_flags&MSG_CONFIRM) |
| 759 | goto do_confirm; |
| 760 | back_from_confirm: |
| 761 | |
| 762 | lock_sock(sk); |
| 763 | if (unlikely(up->pending)) { |
| 764 | /* The socket is already corked while preparing it. */ |
| 765 | /* ... which is an evident application bug. --ANK */ |
| 766 | release_sock(sk); |
| 767 | |
Patrick McHardy | 64ce207 | 2005-08-09 20:50:53 -0700 | [diff] [blame] | 768 | LIMIT_NETDEBUG(KERN_DEBUG "udp cork app bug 2\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | err = -EINVAL; |
| 770 | goto out; |
| 771 | } |
| 772 | |
| 773 | up->pending = AF_INET6; |
| 774 | |
| 775 | do_append_data: |
| 776 | up->len += ulen; |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 777 | getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag; |
| 778 | err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen, |
Herbert Xu | 132a55f | 2006-10-03 14:34:00 -0700 | [diff] [blame] | 779 | sizeof(struct udphdr), hlimit, tclass, opt, &fl, |
YOSHIFUJI Hideaki | 41a1f8e | 2005-09-08 10:19:03 +0900 | [diff] [blame] | 780 | (struct rt6_info*)dst, |
| 781 | corkreq ? msg->msg_flags|MSG_MORE : msg->msg_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | if (err) |
| 783 | udp_v6_flush_pending_frames(sk); |
| 784 | else if (!corkreq) |
Gerrit Renker | 4c0a6cb | 2006-11-27 09:29:59 -0800 | [diff] [blame] | 785 | err = udp_v6_push_pending_frames(sk); |
Herbert Xu | 1e0c14f | 2006-10-03 14:35:49 -0700 | [diff] [blame] | 786 | else if (unlikely(skb_queue_empty(&sk->sk_write_queue))) |
| 787 | up->pending = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | |
David S. Miller | a5e7c21 | 2005-10-03 14:21:58 -0700 | [diff] [blame] | 789 | if (dst) { |
| 790 | if (connected) { |
| 791 | ip6_dst_store(sk, dst, |
Herbert Xu | 132a55f | 2006-10-03 14:34:00 -0700 | [diff] [blame] | 792 | ipv6_addr_equal(&fl.fl6_dst, &np->daddr) ? |
YOSHIFUJI Hideaki | 8e1ef0a | 2006-08-29 17:15:09 -0700 | [diff] [blame] | 793 | &np->daddr : NULL, |
| 794 | #ifdef CONFIG_IPV6_SUBTREES |
Herbert Xu | 132a55f | 2006-10-03 14:34:00 -0700 | [diff] [blame] | 795 | ipv6_addr_equal(&fl.fl6_src, &np->saddr) ? |
YOSHIFUJI Hideaki | 8e1ef0a | 2006-08-29 17:15:09 -0700 | [diff] [blame] | 796 | &np->saddr : |
| 797 | #endif |
| 798 | NULL); |
David S. Miller | a5e7c21 | 2005-10-03 14:21:58 -0700 | [diff] [blame] | 799 | } else { |
| 800 | dst_release(dst); |
| 801 | } |
| 802 | } |
| 803 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | if (err > 0) |
| 805 | err = np->recverr ? net_xmit_errno(err) : 0; |
| 806 | release_sock(sk); |
| 807 | out: |
| 808 | fl6_sock_release(flowlabel); |
| 809 | if (!err) { |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 810 | UDP6_INC_STATS_USER(UDP_MIB_OUTDATAGRAMS, is_udplite); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | return len; |
| 812 | } |
David S. Miller | a18135e | 2006-08-15 00:00:09 -0700 | [diff] [blame] | 813 | /* |
| 814 | * ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting |
| 815 | * ENOBUFS might not be good (it's not tunable per se), but otherwise |
| 816 | * we don't have a good statistic (IpOutDiscards but it can be too many |
| 817 | * things). We could add another new stat but at least for now that |
| 818 | * seems like overkill. |
| 819 | */ |
| 820 | if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) { |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 821 | UDP6_INC_STATS_USER(UDP_MIB_SNDBUFERRORS, is_udplite); |
David S. Miller | a18135e | 2006-08-15 00:00:09 -0700 | [diff] [blame] | 822 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 823 | return err; |
| 824 | |
| 825 | do_confirm: |
| 826 | dst_confirm(dst); |
| 827 | if (!(msg->msg_flags&MSG_PROBE) || len) |
| 828 | goto back_from_confirm; |
| 829 | err = 0; |
| 830 | goto out; |
| 831 | } |
| 832 | |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 833 | int udpv6_destroy_sock(struct sock *sk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | { |
| 835 | lock_sock(sk); |
| 836 | udp_v6_flush_pending_frames(sk); |
| 837 | release_sock(sk); |
| 838 | |
| 839 | inet6_destroy_sock(sk); |
| 840 | |
| 841 | return 0; |
| 842 | } |
| 843 | |
| 844 | /* |
| 845 | * Socket option code for UDP |
| 846 | */ |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 847 | int udpv6_setsockopt(struct sock *sk, int level, int optname, |
| 848 | char __user *optval, int optlen) |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 849 | { |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 850 | if (level == SOL_UDP || level == SOL_UDPLITE) |
Gerrit Renker | 4c0a6cb | 2006-11-27 09:29:59 -0800 | [diff] [blame] | 851 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
| 852 | udp_v6_push_pending_frames); |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 853 | return ipv6_setsockopt(sk, level, optname, optval, optlen); |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 854 | } |
| 855 | |
| 856 | #ifdef CONFIG_COMPAT |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 857 | int compat_udpv6_setsockopt(struct sock *sk, int level, int optname, |
| 858 | char __user *optval, int optlen) |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 859 | { |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 860 | if (level == SOL_UDP || level == SOL_UDPLITE) |
Gerrit Renker | 4c0a6cb | 2006-11-27 09:29:59 -0800 | [diff] [blame] | 861 | return udp_lib_setsockopt(sk, level, optname, optval, optlen, |
| 862 | udp_v6_push_pending_frames); |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 863 | return compat_ipv6_setsockopt(sk, level, optname, optval, optlen); |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 864 | } |
| 865 | #endif |
| 866 | |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 867 | int udpv6_getsockopt(struct sock *sk, int level, int optname, |
| 868 | char __user *optval, int __user *optlen) |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 869 | { |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 870 | if (level == SOL_UDP || level == SOL_UDPLITE) |
Gerrit Renker | 4c0a6cb | 2006-11-27 09:29:59 -0800 | [diff] [blame] | 871 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 872 | return ipv6_getsockopt(sk, level, optname, optval, optlen); |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 873 | } |
| 874 | |
| 875 | #ifdef CONFIG_COMPAT |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 876 | int compat_udpv6_getsockopt(struct sock *sk, int level, int optname, |
| 877 | char __user *optval, int __user *optlen) |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 878 | { |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 879 | if (level == SOL_UDP || level == SOL_UDPLITE) |
Gerrit Renker | 4c0a6cb | 2006-11-27 09:29:59 -0800 | [diff] [blame] | 880 | return udp_lib_getsockopt(sk, level, optname, optval, optlen); |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 881 | return compat_ipv6_getsockopt(sk, level, optname, optval, optlen); |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 882 | } |
| 883 | #endif |
| 884 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 885 | static struct inet6_protocol udpv6_protocol = { |
| 886 | .handler = udpv6_rcv, |
| 887 | .err_handler = udpv6_err, |
| 888 | .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL, |
| 889 | }; |
| 890 | |
| 891 | /* ------------------------------------------------------------------------ */ |
| 892 | #ifdef CONFIG_PROC_FS |
| 893 | |
| 894 | static void udp6_sock_seq_show(struct seq_file *seq, struct sock *sp, int bucket) |
| 895 | { |
| 896 | struct inet_sock *inet = inet_sk(sp); |
| 897 | struct ipv6_pinfo *np = inet6_sk(sp); |
| 898 | struct in6_addr *dest, *src; |
| 899 | __u16 destp, srcp; |
| 900 | |
| 901 | dest = &np->daddr; |
| 902 | src = &np->rcv_saddr; |
| 903 | destp = ntohs(inet->dport); |
| 904 | srcp = ntohs(inet->sport); |
| 905 | seq_printf(seq, |
| 906 | "%4d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " |
| 907 | "%02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p\n", |
| 908 | bucket, |
| 909 | src->s6_addr32[0], src->s6_addr32[1], |
| 910 | src->s6_addr32[2], src->s6_addr32[3], srcp, |
| 911 | dest->s6_addr32[0], dest->s6_addr32[1], |
| 912 | dest->s6_addr32[2], dest->s6_addr32[3], destp, |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 913 | sp->sk_state, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | atomic_read(&sp->sk_wmem_alloc), |
| 915 | atomic_read(&sp->sk_rmem_alloc), |
| 916 | 0, 0L, 0, |
| 917 | sock_i_uid(sp), 0, |
| 918 | sock_i_ino(sp), |
| 919 | atomic_read(&sp->sk_refcnt), sp); |
| 920 | } |
| 921 | |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 922 | int udp6_seq_show(struct seq_file *seq, void *v) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 923 | { |
| 924 | if (v == SEQ_START_TOKEN) |
| 925 | seq_printf(seq, |
| 926 | " sl " |
| 927 | "local_address " |
| 928 | "remote_address " |
| 929 | "st tx_queue rx_queue tr tm->when retrnsmt" |
| 930 | " uid timeout inode\n"); |
| 931 | else |
| 932 | udp6_sock_seq_show(seq, v, ((struct udp_iter_state *)seq->private)->bucket); |
| 933 | return 0; |
| 934 | } |
| 935 | |
| 936 | static struct file_operations udp6_seq_fops; |
| 937 | static struct udp_seq_afinfo udp6_seq_afinfo = { |
| 938 | .owner = THIS_MODULE, |
| 939 | .name = "udp6", |
| 940 | .family = AF_INET6, |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 941 | .hashtable = udp_hash, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 942 | .seq_show = udp6_seq_show, |
| 943 | .seq_fops = &udp6_seq_fops, |
| 944 | }; |
| 945 | |
| 946 | int __init udp6_proc_init(void) |
| 947 | { |
| 948 | return udp_proc_register(&udp6_seq_afinfo); |
| 949 | } |
| 950 | |
| 951 | void udp6_proc_exit(void) { |
| 952 | udp_proc_unregister(&udp6_seq_afinfo); |
| 953 | } |
| 954 | #endif /* CONFIG_PROC_FS */ |
| 955 | |
| 956 | /* ------------------------------------------------------------------------ */ |
| 957 | |
| 958 | struct proto udpv6_prot = { |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 959 | .name = "UDPv6", |
| 960 | .owner = THIS_MODULE, |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 961 | .close = udp_lib_close, |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 962 | .connect = ip6_datagram_connect, |
| 963 | .disconnect = udp_disconnect, |
| 964 | .ioctl = udp_ioctl, |
| 965 | .destroy = udpv6_destroy_sock, |
| 966 | .setsockopt = udpv6_setsockopt, |
| 967 | .getsockopt = udpv6_getsockopt, |
| 968 | .sendmsg = udpv6_sendmsg, |
| 969 | .recvmsg = udpv6_recvmsg, |
| 970 | .backlog_rcv = udpv6_queue_rcv_skb, |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 971 | .hash = udp_lib_hash, |
| 972 | .unhash = udp_lib_unhash, |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 973 | .get_port = udp_v6_get_port, |
| 974 | .obj_size = sizeof(struct udp6_sock), |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 975 | #ifdef CONFIG_COMPAT |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 976 | .compat_setsockopt = compat_udpv6_setsockopt, |
| 977 | .compat_getsockopt = compat_udpv6_getsockopt, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 978 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 979 | }; |
| 980 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 981 | static struct inet_protosw udpv6_protosw = { |
| 982 | .type = SOCK_DGRAM, |
| 983 | .protocol = IPPROTO_UDP, |
| 984 | .prot = &udpv6_prot, |
| 985 | .ops = &inet6_dgram_ops, |
| 986 | .capability =-1, |
| 987 | .no_check = UDP_CSUM_DEFAULT, |
| 988 | .flags = INET_PROTOSW_PERMANENT, |
| 989 | }; |
| 990 | |
| 991 | |
| 992 | void __init udpv6_init(void) |
| 993 | { |
| 994 | if (inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP) < 0) |
| 995 | printk(KERN_ERR "udpv6_init: Could not register protocol\n"); |
| 996 | inet6_register_protosw(&udpv6_protosw); |
| 997 | } |