Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * common UDP/RAW code |
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 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | * This program is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU General Public License |
| 10 | * as published by the Free Software Foundation; either version |
| 11 | * 2 of the License, or (at your option) any later version. |
| 12 | */ |
| 13 | |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 14 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include <linux/errno.h> |
| 16 | #include <linux/types.h> |
| 17 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include <linux/interrupt.h> |
| 19 | #include <linux/socket.h> |
| 20 | #include <linux/sockios.h> |
| 21 | #include <linux/in6.h> |
| 22 | #include <linux/ipv6.h> |
| 23 | #include <linux/route.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 24 | #include <linux/slab.h> |
Chris Elston | a495f83 | 2012-04-29 21:48:53 +0000 | [diff] [blame] | 25 | #include <linux/export.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | |
| 27 | #include <net/ipv6.h> |
| 28 | #include <net/ndisc.h> |
| 29 | #include <net/addrconf.h> |
| 30 | #include <net/transp_v6.h> |
| 31 | #include <net/ip6_route.h> |
Arnaldo Carvalho de Melo | c752f07 | 2005-08-09 20:08:28 -0700 | [diff] [blame] | 32 | #include <net/tcp_states.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | |
| 34 | #include <linux/errqueue.h> |
| 35 | #include <asm/uaccess.h> |
| 36 | |
Eric Dumazet | a50feda | 2012-05-18 18:57:34 +0000 | [diff] [blame] | 37 | static bool ipv6_mapped_addr_any(const struct in6_addr *a) |
Max Matveev | c15fea2 | 2011-08-05 03:56:30 -0700 | [diff] [blame] | 38 | { |
Eric Dumazet | a50feda | 2012-05-18 18:57:34 +0000 | [diff] [blame] | 39 | return ipv6_addr_v4mapped(a) && (a->s6_addr32[3] == 0); |
Max Matveev | c15fea2 | 2011-08-05 03:56:30 -0700 | [diff] [blame] | 40 | } |
| 41 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | int ip6_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len) |
| 43 | { |
| 44 | struct sockaddr_in6 *usin = (struct sockaddr_in6 *) uaddr; |
| 45 | struct inet_sock *inet = inet_sk(sk); |
| 46 | struct ipv6_pinfo *np = inet6_sk(sk); |
Arnaud Ebalard | 20c59de | 2010-06-01 21:35:01 +0000 | [diff] [blame] | 47 | struct in6_addr *daddr, *final_p, final; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | struct dst_entry *dst; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 49 | struct flowi6 fl6; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | struct ip6_flowlabel *flowlabel = NULL; |
Arnaud Ebalard | 20c59de | 2010-06-01 21:35:01 +0000 | [diff] [blame] | 51 | struct ipv6_txoptions *opt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | int addr_type; |
| 53 | int err; |
| 54 | |
| 55 | if (usin->sin6_family == AF_INET) { |
| 56 | if (__ipv6_only_sock(sk)) |
| 57 | return -EAFNOSUPPORT; |
| 58 | err = ip4_datagram_connect(sk, uaddr, addr_len); |
| 59 | goto ipv4_connected; |
| 60 | } |
| 61 | |
| 62 | if (addr_len < SIN6_LEN_RFC2133) |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 63 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 65 | if (usin->sin6_family != AF_INET6) |
| 66 | return -EAFNOSUPPORT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 68 | memset(&fl6, 0, sizeof(fl6)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | if (np->sndflow) { |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 70 | fl6.flowlabel = usin->sin6_flowinfo&IPV6_FLOWINFO_MASK; |
| 71 | if (fl6.flowlabel&IPV6_FLOWLABEL_MASK) { |
| 72 | flowlabel = fl6_sock_lookup(sk, fl6.flowlabel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | if (flowlabel == NULL) |
| 74 | return -EINVAL; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 75 | usin->sin6_addr = flowlabel->dst; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | } |
| 77 | } |
| 78 | |
| 79 | addr_type = ipv6_addr_type(&usin->sin6_addr); |
| 80 | |
| 81 | if (addr_type == IPV6_ADDR_ANY) { |
| 82 | /* |
| 83 | * connect to self |
| 84 | */ |
| 85 | usin->sin6_addr.s6_addr[15] = 0x01; |
| 86 | } |
| 87 | |
| 88 | daddr = &usin->sin6_addr; |
| 89 | |
| 90 | if (addr_type == IPV6_ADDR_MAPPED) { |
| 91 | struct sockaddr_in sin; |
| 92 | |
| 93 | if (__ipv6_only_sock(sk)) { |
| 94 | err = -ENETUNREACH; |
| 95 | goto out; |
| 96 | } |
| 97 | sin.sin_family = AF_INET; |
| 98 | sin.sin_addr.s_addr = daddr->s6_addr32[3]; |
| 99 | sin.sin_port = usin->sin6_port; |
| 100 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 101 | err = ip4_datagram_connect(sk, |
Eldad Zack | b5a4257 | 2012-04-01 07:49:03 +0000 | [diff] [blame] | 102 | (struct sockaddr *) &sin, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | sizeof(sin)); |
| 104 | |
| 105 | ipv4_connected: |
| 106 | if (err) |
| 107 | goto out; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 108 | |
Eric Dumazet | c720c7e8 | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 109 | ipv6_addr_set_v4mapped(inet->inet_daddr, &np->daddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | |
Max Matveev | c15fea2 | 2011-08-05 03:56:30 -0700 | [diff] [blame] | 111 | if (ipv6_addr_any(&np->saddr) || |
| 112 | ipv6_mapped_addr_any(&np->saddr)) |
Eric Dumazet | c720c7e8 | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 113 | ipv6_addr_set_v4mapped(inet->inet_saddr, &np->saddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | |
Max Matveev | c15fea2 | 2011-08-05 03:56:30 -0700 | [diff] [blame] | 115 | if (ipv6_addr_any(&np->rcv_saddr) || |
| 116 | ipv6_mapped_addr_any(&np->rcv_saddr)) { |
Eric Dumazet | c720c7e8 | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 117 | ipv6_addr_set_v4mapped(inet->inet_rcv_saddr, |
| 118 | &np->rcv_saddr); |
Eric Dumazet | 719f835 | 2010-09-08 05:08:44 +0000 | [diff] [blame] | 119 | if (sk->sk_prot->rehash) |
| 120 | sk->sk_prot->rehash(sk); |
| 121 | } |
Brian Haley | b301e82 | 2009-10-07 13:58:25 -0700 | [diff] [blame] | 122 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | goto out; |
| 124 | } |
| 125 | |
| 126 | if (addr_type&IPV6_ADDR_LINKLOCAL) { |
| 127 | if (addr_len >= sizeof(struct sockaddr_in6) && |
| 128 | usin->sin6_scope_id) { |
| 129 | if (sk->sk_bound_dev_if && |
| 130 | sk->sk_bound_dev_if != usin->sin6_scope_id) { |
| 131 | err = -EINVAL; |
| 132 | goto out; |
| 133 | } |
| 134 | sk->sk_bound_dev_if = usin->sin6_scope_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | } |
| 136 | |
Brian Haley | 1ac4f00 | 2008-01-08 23:52:21 -0800 | [diff] [blame] | 137 | if (!sk->sk_bound_dev_if && (addr_type & IPV6_ADDR_MULTICAST)) |
| 138 | sk->sk_bound_dev_if = np->mcast_oif; |
| 139 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | /* Connect to link-local address requires an interface */ |
| 141 | if (!sk->sk_bound_dev_if) { |
| 142 | err = -EINVAL; |
| 143 | goto out; |
| 144 | } |
| 145 | } |
| 146 | |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 147 | np->daddr = *daddr; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 148 | np->flow_label = fl6.flowlabel; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | |
Eric Dumazet | c720c7e8 | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 150 | inet->inet_dport = usin->sin6_port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | |
| 152 | /* |
| 153 | * Check for a route to destination an obtain the |
| 154 | * destination cache for it. |
| 155 | */ |
| 156 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 157 | fl6.flowi6_proto = sk->sk_protocol; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 158 | fl6.daddr = np->daddr; |
| 159 | fl6.saddr = np->saddr; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 160 | fl6.flowi6_oif = sk->sk_bound_dev_if; |
| 161 | fl6.flowi6_mark = sk->sk_mark; |
David S. Miller | 1958b85 | 2011-03-12 16:36:19 -0500 | [diff] [blame] | 162 | fl6.fl6_dport = inet->inet_dport; |
| 163 | fl6.fl6_sport = inet->inet_sport; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 165 | if (!fl6.flowi6_oif && (addr_type&IPV6_ADDR_MULTICAST)) |
| 166 | fl6.flowi6_oif = np->mcast_oif; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 168 | security_sk_classify_flow(sk, flowi6_to_flowi(&fl6)); |
Venkat Yekkirala | beb8d13 | 2006-08-04 23:12:42 -0700 | [diff] [blame] | 169 | |
Arnaud Ebalard | 20c59de | 2010-06-01 21:35:01 +0000 | [diff] [blame] | 170 | opt = flowlabel ? flowlabel->opt : np->opt; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 171 | final_p = fl6_update_dst(&fl6, opt, &final); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 173 | dst = ip6_dst_lookup_flow(sk, &fl6, final_p, true); |
David S. Miller | 68d0c6d | 2011-03-01 13:19:07 -0800 | [diff] [blame] | 174 | err = 0; |
| 175 | if (IS_ERR(dst)) { |
| 176 | err = PTR_ERR(dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | goto out; |
David S. Miller | 14e50e5 | 2007-05-24 18:17:54 -0700 | [diff] [blame] | 178 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | |
| 180 | /* source address lookup done in ip6_dst_lookup */ |
| 181 | |
| 182 | if (ipv6_addr_any(&np->saddr)) |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 183 | np->saddr = fl6.saddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | |
| 185 | if (ipv6_addr_any(&np->rcv_saddr)) { |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 186 | np->rcv_saddr = fl6.saddr; |
Eric Dumazet | c720c7e8 | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 187 | inet->inet_rcv_saddr = LOOPBACK4_IPV6; |
Eric Dumazet | 719f835 | 2010-09-08 05:08:44 +0000 | [diff] [blame] | 188 | if (sk->sk_prot->rehash) |
| 189 | sk->sk_prot->rehash(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | } |
| 191 | |
| 192 | ip6_dst_store(sk, dst, |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 193 | ipv6_addr_equal(&fl6.daddr, &np->daddr) ? |
YOSHIFUJI Hideaki | 8e1ef0a | 2006-08-29 17:15:09 -0700 | [diff] [blame] | 194 | &np->daddr : NULL, |
| 195 | #ifdef CONFIG_IPV6_SUBTREES |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 196 | ipv6_addr_equal(&fl6.saddr, &np->saddr) ? |
YOSHIFUJI Hideaki | 8e1ef0a | 2006-08-29 17:15:09 -0700 | [diff] [blame] | 197 | &np->saddr : |
| 198 | #endif |
| 199 | NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | |
| 201 | sk->sk_state = TCP_ESTABLISHED; |
| 202 | out: |
| 203 | fl6_sock_release(flowlabel); |
| 204 | return err; |
| 205 | } |
Chris Elston | a495f83 | 2012-04-29 21:48:53 +0000 | [diff] [blame] | 206 | EXPORT_SYMBOL_GPL(ip6_datagram_connect); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 208 | void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err, |
Al Viro | e69a4ad | 2006-11-14 20:56:00 -0800 | [diff] [blame] | 209 | __be16 port, u32 info, u8 *payload) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | { |
| 211 | struct ipv6_pinfo *np = inet6_sk(sk); |
Arnaldo Carvalho de Melo | cc70ab2 | 2007-03-13 14:03:22 -0300 | [diff] [blame] | 212 | struct icmp6hdr *icmph = icmp6_hdr(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | struct sock_exterr_skb *serr; |
| 214 | |
| 215 | if (!np->recverr) |
| 216 | return; |
| 217 | |
| 218 | skb = skb_clone(skb, GFP_ATOMIC); |
| 219 | if (!skb) |
| 220 | return; |
| 221 | |
Brian Haley | d40a4de | 2010-05-03 15:44:27 +0000 | [diff] [blame] | 222 | skb->protocol = htons(ETH_P_IPV6); |
| 223 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | serr = SKB_EXT_ERR(skb); |
| 225 | serr->ee.ee_errno = err; |
| 226 | serr->ee.ee_origin = SO_EE_ORIGIN_ICMP6; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 227 | serr->ee.ee_type = icmph->icmp6_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | serr->ee.ee_code = icmph->icmp6_code; |
| 229 | serr->ee.ee_pad = 0; |
| 230 | serr->ee.ee_info = info; |
| 231 | serr->ee.ee_data = 0; |
Arnaldo Carvalho de Melo | d56f90a | 2007-04-10 20:50:43 -0700 | [diff] [blame] | 232 | serr->addr_offset = (u8 *)&(((struct ipv6hdr *)(icmph + 1))->daddr) - |
| 233 | skb_network_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | serr->port = port; |
| 235 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | __skb_pull(skb, payload - skb->data); |
Arnaldo Carvalho de Melo | bd82393 | 2007-03-13 17:10:43 -0300 | [diff] [blame] | 237 | skb_reset_transport_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | |
| 239 | if (sock_queue_err_skb(sk, skb)) |
| 240 | kfree_skb(skb); |
| 241 | } |
| 242 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 243 | void ipv6_local_error(struct sock *sk, int err, struct flowi6 *fl6, u32 info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | { |
| 245 | struct ipv6_pinfo *np = inet6_sk(sk); |
| 246 | struct sock_exterr_skb *serr; |
| 247 | struct ipv6hdr *iph; |
| 248 | struct sk_buff *skb; |
| 249 | |
| 250 | if (!np->recverr) |
| 251 | return; |
| 252 | |
| 253 | skb = alloc_skb(sizeof(struct ipv6hdr), GFP_ATOMIC); |
| 254 | if (!skb) |
| 255 | return; |
| 256 | |
Brian Haley | d40a4de | 2010-05-03 15:44:27 +0000 | [diff] [blame] | 257 | skb->protocol = htons(ETH_P_IPV6); |
| 258 | |
Arnaldo Carvalho de Melo | 1ced98e | 2007-03-10 19:57:15 -0300 | [diff] [blame] | 259 | skb_put(skb, sizeof(struct ipv6hdr)); |
| 260 | skb_reset_network_header(skb); |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 261 | iph = ipv6_hdr(skb); |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 262 | iph->daddr = fl6->daddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | |
| 264 | serr = SKB_EXT_ERR(skb); |
| 265 | serr->ee.ee_errno = err; |
| 266 | serr->ee.ee_origin = SO_EE_ORIGIN_LOCAL; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 267 | serr->ee.ee_type = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | serr->ee.ee_code = 0; |
| 269 | serr->ee.ee_pad = 0; |
| 270 | serr->ee.ee_info = info; |
| 271 | serr->ee.ee_data = 0; |
Arnaldo Carvalho de Melo | d56f90a | 2007-04-10 20:50:43 -0700 | [diff] [blame] | 272 | serr->addr_offset = (u8 *)&iph->daddr - skb_network_header(skb); |
David S. Miller | 1958b85 | 2011-03-12 16:36:19 -0500 | [diff] [blame] | 273 | serr->port = fl6->fl6_dport; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 275 | __skb_pull(skb, skb_tail_pointer(skb) - skb->data); |
Arnaldo Carvalho de Melo | bd82393 | 2007-03-13 17:10:43 -0300 | [diff] [blame] | 276 | skb_reset_transport_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | |
| 278 | if (sock_queue_err_skb(sk, skb)) |
| 279 | kfree_skb(skb); |
| 280 | } |
| 281 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 282 | void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu) |
Brian Haley | 4b340ae | 2010-04-23 11:26:09 +0000 | [diff] [blame] | 283 | { |
| 284 | struct ipv6_pinfo *np = inet6_sk(sk); |
| 285 | struct ipv6hdr *iph; |
| 286 | struct sk_buff *skb; |
| 287 | struct ip6_mtuinfo *mtu_info; |
| 288 | |
| 289 | if (!np->rxopt.bits.rxpmtu) |
| 290 | return; |
| 291 | |
| 292 | skb = alloc_skb(sizeof(struct ipv6hdr), GFP_ATOMIC); |
| 293 | if (!skb) |
| 294 | return; |
| 295 | |
| 296 | skb_put(skb, sizeof(struct ipv6hdr)); |
| 297 | skb_reset_network_header(skb); |
| 298 | iph = ipv6_hdr(skb); |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 299 | iph->daddr = fl6->daddr; |
Brian Haley | 4b340ae | 2010-04-23 11:26:09 +0000 | [diff] [blame] | 300 | |
| 301 | mtu_info = IP6CBMTU(skb); |
Brian Haley | 4b340ae | 2010-04-23 11:26:09 +0000 | [diff] [blame] | 302 | |
| 303 | mtu_info->ip6m_mtu = mtu; |
| 304 | mtu_info->ip6m_addr.sin6_family = AF_INET6; |
| 305 | mtu_info->ip6m_addr.sin6_port = 0; |
| 306 | mtu_info->ip6m_addr.sin6_flowinfo = 0; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 307 | mtu_info->ip6m_addr.sin6_scope_id = fl6->flowi6_oif; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 308 | mtu_info->ip6m_addr.sin6_addr = ipv6_hdr(skb)->daddr; |
Brian Haley | 4b340ae | 2010-04-23 11:26:09 +0000 | [diff] [blame] | 309 | |
| 310 | __skb_pull(skb, skb_tail_pointer(skb) - skb->data); |
| 311 | skb_reset_transport_header(skb); |
| 312 | |
| 313 | skb = xchg(&np->rxpmtu, skb); |
| 314 | kfree_skb(skb); |
| 315 | } |
| 316 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 317 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | * Handle MSG_ERRQUEUE |
| 319 | */ |
| 320 | int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len) |
| 321 | { |
| 322 | struct ipv6_pinfo *np = inet6_sk(sk); |
| 323 | struct sock_exterr_skb *serr; |
| 324 | struct sk_buff *skb, *skb2; |
| 325 | struct sockaddr_in6 *sin; |
| 326 | struct { |
| 327 | struct sock_extended_err ee; |
| 328 | struct sockaddr_in6 offender; |
| 329 | } errhdr; |
| 330 | int err; |
| 331 | int copied; |
| 332 | |
| 333 | err = -EAGAIN; |
| 334 | skb = skb_dequeue(&sk->sk_error_queue); |
| 335 | if (skb == NULL) |
| 336 | goto out; |
| 337 | |
| 338 | copied = skb->len; |
| 339 | if (copied > len) { |
| 340 | msg->msg_flags |= MSG_TRUNC; |
| 341 | copied = len; |
| 342 | } |
| 343 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
| 344 | if (err) |
| 345 | goto out_free_skb; |
| 346 | |
| 347 | sock_recv_timestamp(msg, sk, skb); |
| 348 | |
| 349 | serr = SKB_EXT_ERR(skb); |
| 350 | |
| 351 | sin = (struct sockaddr_in6 *)msg->msg_name; |
| 352 | if (sin) { |
Arnaldo Carvalho de Melo | d56f90a | 2007-04-10 20:50:43 -0700 | [diff] [blame] | 353 | const unsigned char *nh = skb_network_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | sin->sin6_family = AF_INET6; |
| 355 | sin->sin6_flowinfo = 0; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 356 | sin->sin6_port = serr->port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | sin->sin6_scope_id = 0; |
Brian Haley | d40a4de | 2010-05-03 15:44:27 +0000 | [diff] [blame] | 358 | if (skb->protocol == htons(ETH_P_IPV6)) { |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 359 | sin->sin6_addr = |
| 360 | *(struct in6_addr *)(nh + serr->addr_offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | if (np->sndflow) |
Arnaldo Carvalho de Melo | d56f90a | 2007-04-10 20:50:43 -0700 | [diff] [blame] | 362 | sin->sin6_flowinfo = |
| 363 | (*(__be32 *)(nh + serr->addr_offset - 24) & |
| 364 | IPV6_FLOWINFO_MASK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | if (ipv6_addr_type(&sin->sin6_addr) & IPV6_ADDR_LINKLOCAL) |
| 366 | sin->sin6_scope_id = IP6CB(skb)->iif; |
| 367 | } else { |
Brian Haley | b301e82 | 2009-10-07 13:58:25 -0700 | [diff] [blame] | 368 | ipv6_addr_set_v4mapped(*(__be32 *)(nh + serr->addr_offset), |
| 369 | &sin->sin6_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | } |
| 371 | } |
| 372 | |
| 373 | memcpy(&errhdr.ee, &serr->ee, sizeof(struct sock_extended_err)); |
| 374 | sin = &errhdr.offender; |
| 375 | sin->sin6_family = AF_UNSPEC; |
| 376 | if (serr->ee.ee_origin != SO_EE_ORIGIN_LOCAL) { |
| 377 | sin->sin6_family = AF_INET6; |
| 378 | sin->sin6_flowinfo = 0; |
| 379 | sin->sin6_scope_id = 0; |
Brian Haley | d40a4de | 2010-05-03 15:44:27 +0000 | [diff] [blame] | 380 | if (skb->protocol == htons(ETH_P_IPV6)) { |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 381 | sin->sin6_addr = ipv6_hdr(skb)->saddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | if (np->rxopt.all) |
Tom Parkin | 73df66f | 2013-01-31 01:02:24 +0000 | [diff] [blame] | 383 | ip6_datagram_recv_ctl(sk, msg, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | if (ipv6_addr_type(&sin->sin6_addr) & IPV6_ADDR_LINKLOCAL) |
| 385 | sin->sin6_scope_id = IP6CB(skb)->iif; |
| 386 | } else { |
| 387 | struct inet_sock *inet = inet_sk(sk); |
| 388 | |
Brian Haley | b301e82 | 2009-10-07 13:58:25 -0700 | [diff] [blame] | 389 | ipv6_addr_set_v4mapped(ip_hdr(skb)->saddr, |
| 390 | &sin->sin6_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | if (inet->cmsg_flags) |
| 392 | ip_cmsg_recv(msg, skb); |
| 393 | } |
| 394 | } |
| 395 | |
| 396 | put_cmsg(msg, SOL_IPV6, IPV6_RECVERR, sizeof(errhdr), &errhdr); |
| 397 | |
| 398 | /* Now we could try to dump offended packet options */ |
| 399 | |
| 400 | msg->msg_flags |= MSG_ERRQUEUE; |
| 401 | err = copied; |
| 402 | |
| 403 | /* Reset and regenerate socket error */ |
Herbert Xu | e0f9f85 | 2005-06-18 22:56:18 -0700 | [diff] [blame] | 404 | spin_lock_bh(&sk->sk_error_queue.lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | sk->sk_err = 0; |
| 406 | if ((skb2 = skb_peek(&sk->sk_error_queue)) != NULL) { |
| 407 | sk->sk_err = SKB_EXT_ERR(skb2)->ee.ee_errno; |
Herbert Xu | e0f9f85 | 2005-06-18 22:56:18 -0700 | [diff] [blame] | 408 | spin_unlock_bh(&sk->sk_error_queue.lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | sk->sk_error_report(sk); |
| 410 | } else { |
Herbert Xu | e0f9f85 | 2005-06-18 22:56:18 -0700 | [diff] [blame] | 411 | spin_unlock_bh(&sk->sk_error_queue.lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | } |
| 413 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 414 | out_free_skb: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | kfree_skb(skb); |
| 416 | out: |
| 417 | return err; |
| 418 | } |
Chris Elston | a495f83 | 2012-04-29 21:48:53 +0000 | [diff] [blame] | 419 | EXPORT_SYMBOL_GPL(ipv6_recv_error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | |
Brian Haley | 4b340ae | 2010-04-23 11:26:09 +0000 | [diff] [blame] | 421 | /* |
| 422 | * Handle IPV6_RECVPATHMTU |
| 423 | */ |
| 424 | int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len) |
| 425 | { |
| 426 | struct ipv6_pinfo *np = inet6_sk(sk); |
| 427 | struct sk_buff *skb; |
| 428 | struct sockaddr_in6 *sin; |
| 429 | struct ip6_mtuinfo mtu_info; |
| 430 | int err; |
| 431 | int copied; |
| 432 | |
| 433 | err = -EAGAIN; |
| 434 | skb = xchg(&np->rxpmtu, NULL); |
| 435 | if (skb == NULL) |
| 436 | goto out; |
| 437 | |
| 438 | copied = skb->len; |
| 439 | if (copied > len) { |
| 440 | msg->msg_flags |= MSG_TRUNC; |
| 441 | copied = len; |
| 442 | } |
| 443 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
| 444 | if (err) |
| 445 | goto out_free_skb; |
| 446 | |
| 447 | sock_recv_timestamp(msg, sk, skb); |
| 448 | |
| 449 | memcpy(&mtu_info, IP6CBMTU(skb), sizeof(mtu_info)); |
| 450 | |
| 451 | sin = (struct sockaddr_in6 *)msg->msg_name; |
| 452 | if (sin) { |
| 453 | sin->sin6_family = AF_INET6; |
| 454 | sin->sin6_flowinfo = 0; |
| 455 | sin->sin6_port = 0; |
| 456 | sin->sin6_scope_id = mtu_info.ip6m_addr.sin6_scope_id; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 457 | sin->sin6_addr = mtu_info.ip6m_addr.sin6_addr; |
Brian Haley | 4b340ae | 2010-04-23 11:26:09 +0000 | [diff] [blame] | 458 | } |
| 459 | |
| 460 | put_cmsg(msg, SOL_IPV6, IPV6_PATHMTU, sizeof(mtu_info), &mtu_info); |
| 461 | |
| 462 | err = copied; |
| 463 | |
| 464 | out_free_skb: |
| 465 | kfree_skb(skb); |
| 466 | out: |
| 467 | return err; |
| 468 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | |
| 470 | |
Tom Parkin | 73df66f | 2013-01-31 01:02:24 +0000 | [diff] [blame] | 471 | int ip6_datagram_recv_ctl(struct sock *sk, struct msghdr *msg, |
| 472 | struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | { |
| 474 | struct ipv6_pinfo *np = inet6_sk(sk); |
| 475 | struct inet6_skb_parm *opt = IP6CB(skb); |
Arnaldo Carvalho de Melo | d56f90a | 2007-04-10 20:50:43 -0700 | [diff] [blame] | 476 | unsigned char *nh = skb_network_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | |
| 478 | if (np->rxopt.bits.rxinfo) { |
| 479 | struct in6_pktinfo src_info; |
| 480 | |
| 481 | src_info.ipi6_ifindex = opt->iif; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 482 | src_info.ipi6_addr = ipv6_hdr(skb)->daddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | put_cmsg(msg, SOL_IPV6, IPV6_PKTINFO, sizeof(src_info), &src_info); |
| 484 | } |
| 485 | |
| 486 | if (np->rxopt.bits.rxhlim) { |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 487 | int hlim = ipv6_hdr(skb)->hop_limit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | put_cmsg(msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim); |
| 489 | } |
| 490 | |
YOSHIFUJI Hideaki | 41a1f8e | 2005-09-08 10:19:03 +0900 | [diff] [blame] | 491 | if (np->rxopt.bits.rxtclass) { |
Jiri Benc | 7a3198a | 2012-02-09 09:34:41 +0000 | [diff] [blame] | 492 | int tclass = ipv6_tclass(ipv6_hdr(skb)); |
YOSHIFUJI Hideaki | 41a1f8e | 2005-09-08 10:19:03 +0900 | [diff] [blame] | 493 | put_cmsg(msg, SOL_IPV6, IPV6_TCLASS, sizeof(tclass), &tclass); |
| 494 | } |
| 495 | |
Arnaldo Carvalho de Melo | d56f90a | 2007-04-10 20:50:43 -0700 | [diff] [blame] | 496 | if (np->rxopt.bits.rxflow && (*(__be32 *)nh & IPV6_FLOWINFO_MASK)) { |
| 497 | __be32 flowinfo = *(__be32 *)nh & IPV6_FLOWINFO_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | put_cmsg(msg, SOL_IPV6, IPV6_FLOWINFO, sizeof(flowinfo), &flowinfo); |
| 499 | } |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 500 | |
| 501 | /* HbH is allowed only once */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | if (np->rxopt.bits.hopopts && opt->hop) { |
Arnaldo Carvalho de Melo | d56f90a | 2007-04-10 20:50:43 -0700 | [diff] [blame] | 503 | u8 *ptr = nh + opt->hop; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | put_cmsg(msg, SOL_IPV6, IPV6_HOPOPTS, (ptr[1]+1)<<3, ptr); |
| 505 | } |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 506 | |
| 507 | if (opt->lastopt && |
| 508 | (np->rxopt.bits.dstopts || np->rxopt.bits.srcrt)) { |
| 509 | /* |
| 510 | * Silly enough, but we need to reparse in order to |
| 511 | * report extension headers (except for HbH) |
| 512 | * in order. |
| 513 | * |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 514 | * Also note that IPV6_RECVRTHDRDSTOPTS is NOT |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 515 | * (and WILL NOT be) defined because |
| 516 | * IPV6_RECVDSTOPTS is more generic. --yoshfuji |
| 517 | */ |
| 518 | unsigned int off = sizeof(struct ipv6hdr); |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 519 | u8 nexthdr = ipv6_hdr(skb)->nexthdr; |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 520 | |
| 521 | while (off <= opt->lastopt) { |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 522 | unsigned int len; |
Arnaldo Carvalho de Melo | d56f90a | 2007-04-10 20:50:43 -0700 | [diff] [blame] | 523 | u8 *ptr = nh + off; |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 524 | |
Eldad Zack | b5a4257 | 2012-04-01 07:49:03 +0000 | [diff] [blame] | 525 | switch (nexthdr) { |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 526 | case IPPROTO_DSTOPTS: |
| 527 | nexthdr = ptr[0]; |
| 528 | len = (ptr[1] + 1) << 3; |
| 529 | if (np->rxopt.bits.dstopts) |
| 530 | put_cmsg(msg, SOL_IPV6, IPV6_DSTOPTS, len, ptr); |
| 531 | break; |
| 532 | case IPPROTO_ROUTING: |
| 533 | nexthdr = ptr[0]; |
| 534 | len = (ptr[1] + 1) << 3; |
| 535 | if (np->rxopt.bits.srcrt) |
| 536 | put_cmsg(msg, SOL_IPV6, IPV6_RTHDR, len, ptr); |
| 537 | break; |
| 538 | case IPPROTO_AH: |
| 539 | nexthdr = ptr[0]; |
Ville Nuorvala | a305989 | 2005-11-20 12:21:59 +0900 | [diff] [blame] | 540 | len = (ptr[1] + 2) << 2; |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 541 | break; |
| 542 | default: |
| 543 | nexthdr = ptr[0]; |
| 544 | len = (ptr[1] + 1) << 3; |
| 545 | break; |
| 546 | } |
| 547 | |
| 548 | off += len; |
| 549 | } |
| 550 | } |
| 551 | |
| 552 | /* socket options in old style */ |
| 553 | if (np->rxopt.bits.rxoinfo) { |
| 554 | struct in6_pktinfo src_info; |
| 555 | |
| 556 | src_info.ipi6_ifindex = opt->iif; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 557 | src_info.ipi6_addr = ipv6_hdr(skb)->daddr; |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 558 | put_cmsg(msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info); |
| 559 | } |
| 560 | if (np->rxopt.bits.rxohlim) { |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 561 | int hlim = ipv6_hdr(skb)->hop_limit; |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 562 | put_cmsg(msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim); |
| 563 | } |
| 564 | if (np->rxopt.bits.ohopopts && opt->hop) { |
Arnaldo Carvalho de Melo | d56f90a | 2007-04-10 20:50:43 -0700 | [diff] [blame] | 565 | u8 *ptr = nh + opt->hop; |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 566 | put_cmsg(msg, SOL_IPV6, IPV6_2292HOPOPTS, (ptr[1]+1)<<3, ptr); |
| 567 | } |
| 568 | if (np->rxopt.bits.odstopts && opt->dst0) { |
Arnaldo Carvalho de Melo | d56f90a | 2007-04-10 20:50:43 -0700 | [diff] [blame] | 569 | u8 *ptr = nh + opt->dst0; |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 570 | put_cmsg(msg, SOL_IPV6, IPV6_2292DSTOPTS, (ptr[1]+1)<<3, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | } |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 572 | if (np->rxopt.bits.osrcrt && opt->srcrt) { |
Arnaldo Carvalho de Melo | d56f90a | 2007-04-10 20:50:43 -0700 | [diff] [blame] | 573 | struct ipv6_rt_hdr *rthdr = (struct ipv6_rt_hdr *)(nh + opt->srcrt); |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 574 | put_cmsg(msg, SOL_IPV6, IPV6_2292RTHDR, (rthdr->hdrlen+1) << 3, rthdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | } |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 576 | if (np->rxopt.bits.odstopts && opt->dst1) { |
Arnaldo Carvalho de Melo | d56f90a | 2007-04-10 20:50:43 -0700 | [diff] [blame] | 577 | u8 *ptr = nh + opt->dst1; |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 578 | put_cmsg(msg, SOL_IPV6, IPV6_2292DSTOPTS, (ptr[1]+1)<<3, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | } |
Balazs Scheidler | 6c46862 | 2010-10-21 16:08:28 +0200 | [diff] [blame] | 580 | if (np->rxopt.bits.rxorigdstaddr) { |
| 581 | struct sockaddr_in6 sin6; |
Eric Dumazet | 747465e | 2012-01-16 19:27:39 +0000 | [diff] [blame] | 582 | __be16 *ports = (__be16 *) skb_transport_header(skb); |
Balazs Scheidler | 6c46862 | 2010-10-21 16:08:28 +0200 | [diff] [blame] | 583 | |
| 584 | if (skb_transport_offset(skb) + 4 <= skb->len) { |
| 585 | /* All current transport protocols have the port numbers in the |
| 586 | * first four bytes of the transport header and this function is |
| 587 | * written with this assumption in mind. |
| 588 | */ |
| 589 | |
| 590 | sin6.sin6_family = AF_INET6; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 591 | sin6.sin6_addr = ipv6_hdr(skb)->daddr; |
Balazs Scheidler | 6c46862 | 2010-10-21 16:08:28 +0200 | [diff] [blame] | 592 | sin6.sin6_port = ports[1]; |
| 593 | sin6.sin6_flowinfo = 0; |
| 594 | sin6.sin6_scope_id = 0; |
| 595 | |
| 596 | put_cmsg(msg, SOL_IPV6, IPV6_ORIGDSTADDR, sizeof(sin6), &sin6); |
| 597 | } |
| 598 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | return 0; |
| 600 | } |
Tom Parkin | 8e72d37 | 2013-01-31 01:02:25 +0000 | [diff] [blame] | 601 | EXPORT_SYMBOL_GPL(ip6_datagram_recv_ctl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | |
Tom Parkin | 73df66f | 2013-01-31 01:02:24 +0000 | [diff] [blame] | 603 | int ip6_datagram_send_ctl(struct net *net, struct sock *sk, |
| 604 | struct msghdr *msg, struct flowi6 *fl6, |
| 605 | struct ipv6_txoptions *opt, |
| 606 | int *hlimit, int *tclass, int *dontfrag) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | { |
| 608 | struct in6_pktinfo *src_info; |
| 609 | struct cmsghdr *cmsg; |
| 610 | struct ipv6_rt_hdr *rthdr; |
| 611 | struct ipv6_opt_hdr *hdr; |
| 612 | int len; |
| 613 | int err = 0; |
| 614 | |
| 615 | for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) { |
| 616 | int addr_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | |
| 618 | if (!CMSG_OK(msg, cmsg)) { |
| 619 | err = -EINVAL; |
| 620 | goto exit_f; |
| 621 | } |
| 622 | |
| 623 | if (cmsg->cmsg_level != SOL_IPV6) |
| 624 | continue; |
| 625 | |
| 626 | switch (cmsg->cmsg_type) { |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 627 | case IPV6_PKTINFO: |
| 628 | case IPV6_2292PKTINFO: |
YOSHIFUJI Hideaki | 187e383 | 2008-06-04 13:01:37 +0900 | [diff] [blame] | 629 | { |
| 630 | struct net_device *dev = NULL; |
| 631 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 632 | if (cmsg->cmsg_len < CMSG_LEN(sizeof(struct in6_pktinfo))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | err = -EINVAL; |
| 634 | goto exit_f; |
| 635 | } |
| 636 | |
| 637 | src_info = (struct in6_pktinfo *)CMSG_DATA(cmsg); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 638 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 639 | if (src_info->ipi6_ifindex) { |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 640 | if (fl6->flowi6_oif && |
| 641 | src_info->ipi6_ifindex != fl6->flowi6_oif) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | return -EINVAL; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 643 | fl6->flowi6_oif = src_info->ipi6_ifindex; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | } |
| 645 | |
YOSHIFUJI Hideaki | 187e383 | 2008-06-04 13:01:37 +0900 | [diff] [blame] | 646 | addr_type = __ipv6_addr_type(&src_info->ipi6_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | |
Eric Dumazet | 536b2e9 | 2009-11-02 12:21:06 +0100 | [diff] [blame] | 648 | rcu_read_lock(); |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 649 | if (fl6->flowi6_oif) { |
| 650 | dev = dev_get_by_index_rcu(net, fl6->flowi6_oif); |
Eric Dumazet | 536b2e9 | 2009-11-02 12:21:06 +0100 | [diff] [blame] | 651 | if (!dev) { |
| 652 | rcu_read_unlock(); |
YOSHIFUJI Hideaki | 187e383 | 2008-06-04 13:01:37 +0900 | [diff] [blame] | 653 | return -ENODEV; |
Eric Dumazet | 536b2e9 | 2009-11-02 12:21:06 +0100 | [diff] [blame] | 654 | } |
| 655 | } else if (addr_type & IPV6_ADDR_LINKLOCAL) { |
| 656 | rcu_read_unlock(); |
YOSHIFUJI Hideaki | 187e383 | 2008-06-04 13:01:37 +0900 | [diff] [blame] | 657 | return -EINVAL; |
Eric Dumazet | 536b2e9 | 2009-11-02 12:21:06 +0100 | [diff] [blame] | 658 | } |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 659 | |
YOSHIFUJI Hideaki | 187e383 | 2008-06-04 13:01:37 +0900 | [diff] [blame] | 660 | if (addr_type != IPV6_ADDR_ANY) { |
| 661 | int strict = __ipv6_addr_src_scope(addr_type) <= IPV6_ADDR_SCOPE_LINKLOCAL; |
Maciej Żenczykowski | 2563fa5 | 2011-11-07 14:57:22 +0000 | [diff] [blame] | 662 | if (!(inet_sk(sk)->freebind || inet_sk(sk)->transparent) && |
Maciej Żenczykowski | ec0506d | 2011-08-28 12:35:31 +0000 | [diff] [blame] | 663 | !ipv6_chk_addr(net, &src_info->ipi6_addr, |
YOSHIFUJI Hideaki | 187e383 | 2008-06-04 13:01:37 +0900 | [diff] [blame] | 664 | strict ? dev : NULL, 0)) |
| 665 | err = -EINVAL; |
| 666 | else |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 667 | fl6->saddr = src_info->ipi6_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | } |
YOSHIFUJI Hideaki | 187e383 | 2008-06-04 13:01:37 +0900 | [diff] [blame] | 669 | |
Eric Dumazet | 536b2e9 | 2009-11-02 12:21:06 +0100 | [diff] [blame] | 670 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | |
YOSHIFUJI Hideaki | 187e383 | 2008-06-04 13:01:37 +0900 | [diff] [blame] | 672 | if (err) |
| 673 | goto exit_f; |
| 674 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | break; |
YOSHIFUJI Hideaki | 187e383 | 2008-06-04 13:01:37 +0900 | [diff] [blame] | 676 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | |
| 678 | case IPV6_FLOWINFO: |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 679 | if (cmsg->cmsg_len < CMSG_LEN(4)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | err = -EINVAL; |
| 681 | goto exit_f; |
| 682 | } |
| 683 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 684 | if (fl6->flowlabel&IPV6_FLOWINFO_MASK) { |
| 685 | if ((fl6->flowlabel^*(__be32 *)CMSG_DATA(cmsg))&~IPV6_FLOWINFO_MASK) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | err = -EINVAL; |
| 687 | goto exit_f; |
| 688 | } |
| 689 | } |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 690 | fl6->flowlabel = IPV6_FLOWINFO_MASK & *(__be32 *)CMSG_DATA(cmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 691 | break; |
| 692 | |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 693 | case IPV6_2292HOPOPTS: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | case IPV6_HOPOPTS: |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 695 | if (opt->hopopt || cmsg->cmsg_len < CMSG_LEN(sizeof(struct ipv6_opt_hdr))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | err = -EINVAL; |
| 697 | goto exit_f; |
| 698 | } |
| 699 | |
| 700 | hdr = (struct ipv6_opt_hdr *)CMSG_DATA(cmsg); |
| 701 | len = ((hdr->hdrlen + 1) << 3); |
| 702 | if (cmsg->cmsg_len < CMSG_LEN(len)) { |
| 703 | err = -EINVAL; |
| 704 | goto exit_f; |
| 705 | } |
Eric W. Biederman | af31f41 | 2012-11-16 03:03:06 +0000 | [diff] [blame] | 706 | if (!ns_capable(net->user_ns, CAP_NET_RAW)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | err = -EPERM; |
| 708 | goto exit_f; |
| 709 | } |
| 710 | opt->opt_nflen += len; |
| 711 | opt->hopopt = hdr; |
| 712 | break; |
| 713 | |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 714 | case IPV6_2292DSTOPTS: |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 715 | if (cmsg->cmsg_len < CMSG_LEN(sizeof(struct ipv6_opt_hdr))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | err = -EINVAL; |
| 717 | goto exit_f; |
| 718 | } |
| 719 | |
| 720 | hdr = (struct ipv6_opt_hdr *)CMSG_DATA(cmsg); |
| 721 | len = ((hdr->hdrlen + 1) << 3); |
| 722 | if (cmsg->cmsg_len < CMSG_LEN(len)) { |
| 723 | err = -EINVAL; |
| 724 | goto exit_f; |
| 725 | } |
Eric W. Biederman | af31f41 | 2012-11-16 03:03:06 +0000 | [diff] [blame] | 726 | if (!ns_capable(net->user_ns, CAP_NET_RAW)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | err = -EPERM; |
| 728 | goto exit_f; |
| 729 | } |
| 730 | if (opt->dst1opt) { |
| 731 | err = -EINVAL; |
| 732 | goto exit_f; |
| 733 | } |
| 734 | opt->opt_flen += len; |
| 735 | opt->dst1opt = hdr; |
| 736 | break; |
| 737 | |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 738 | case IPV6_DSTOPTS: |
| 739 | case IPV6_RTHDRDSTOPTS: |
| 740 | if (cmsg->cmsg_len < CMSG_LEN(sizeof(struct ipv6_opt_hdr))) { |
| 741 | err = -EINVAL; |
| 742 | goto exit_f; |
| 743 | } |
| 744 | |
| 745 | hdr = (struct ipv6_opt_hdr *)CMSG_DATA(cmsg); |
| 746 | len = ((hdr->hdrlen + 1) << 3); |
| 747 | if (cmsg->cmsg_len < CMSG_LEN(len)) { |
| 748 | err = -EINVAL; |
| 749 | goto exit_f; |
| 750 | } |
Eric W. Biederman | af31f41 | 2012-11-16 03:03:06 +0000 | [diff] [blame] | 751 | if (!ns_capable(net->user_ns, CAP_NET_RAW)) { |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 752 | err = -EPERM; |
| 753 | goto exit_f; |
| 754 | } |
| 755 | if (cmsg->cmsg_type == IPV6_DSTOPTS) { |
| 756 | opt->opt_flen += len; |
| 757 | opt->dst1opt = hdr; |
| 758 | } else { |
| 759 | opt->opt_nflen += len; |
| 760 | opt->dst0opt = hdr; |
| 761 | } |
| 762 | break; |
| 763 | |
| 764 | case IPV6_2292RTHDR: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | case IPV6_RTHDR: |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 766 | if (cmsg->cmsg_len < CMSG_LEN(sizeof(struct ipv6_rt_hdr))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 767 | err = -EINVAL; |
| 768 | goto exit_f; |
| 769 | } |
| 770 | |
| 771 | rthdr = (struct ipv6_rt_hdr *)CMSG_DATA(cmsg); |
| 772 | |
Masahide NAKAMURA | 280a9d3 | 2006-08-23 19:17:12 -0700 | [diff] [blame] | 773 | switch (rthdr->type) { |
Amerigo Wang | 07a9362 | 2012-10-29 16:23:10 +0000 | [diff] [blame] | 774 | #if IS_ENABLED(CONFIG_IPV6_MIP6) |
Masahide NAKAMURA | 280a9d3 | 2006-08-23 19:17:12 -0700 | [diff] [blame] | 775 | case IPV6_SRCRT_TYPE_2: |
Brian Haley | 6e093d9 | 2008-11-12 22:59:21 -0800 | [diff] [blame] | 776 | if (rthdr->hdrlen != 2 || |
| 777 | rthdr->segments_left != 1) { |
| 778 | err = -EINVAL; |
| 779 | goto exit_f; |
| 780 | } |
Masahide NAKAMURA | 280a9d3 | 2006-08-23 19:17:12 -0700 | [diff] [blame] | 781 | break; |
YOSHIFUJI Hideaki | bb4dbf9 | 2007-07-10 22:55:49 -0700 | [diff] [blame] | 782 | #endif |
Masahide NAKAMURA | 280a9d3 | 2006-08-23 19:17:12 -0700 | [diff] [blame] | 783 | default: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | err = -EINVAL; |
| 785 | goto exit_f; |
| 786 | } |
| 787 | |
| 788 | len = ((rthdr->hdrlen + 1) << 3); |
| 789 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 790 | if (cmsg->cmsg_len < CMSG_LEN(len)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | err = -EINVAL; |
| 792 | goto exit_f; |
| 793 | } |
| 794 | |
| 795 | /* segments left must also match */ |
| 796 | if ((rthdr->hdrlen >> 1) != rthdr->segments_left) { |
| 797 | err = -EINVAL; |
| 798 | goto exit_f; |
| 799 | } |
| 800 | |
| 801 | opt->opt_nflen += len; |
| 802 | opt->srcrt = rthdr; |
| 803 | |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 804 | if (cmsg->cmsg_type == IPV6_2292RTHDR && opt->dst1opt) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | int dsthdrlen = ((opt->dst1opt->hdrlen+1)<<3); |
| 806 | |
| 807 | opt->opt_nflen += dsthdrlen; |
| 808 | opt->dst0opt = opt->dst1opt; |
| 809 | opt->dst1opt = NULL; |
| 810 | opt->opt_flen -= dsthdrlen; |
| 811 | } |
| 812 | |
| 813 | break; |
| 814 | |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 815 | case IPV6_2292HOPLIMIT: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | case IPV6_HOPLIMIT: |
| 817 | if (cmsg->cmsg_len != CMSG_LEN(sizeof(int))) { |
| 818 | err = -EINVAL; |
| 819 | goto exit_f; |
| 820 | } |
| 821 | |
| 822 | *hlimit = *(int *)CMSG_DATA(cmsg); |
Shan Wei | e8766fc | 2008-06-10 15:50:55 +0800 | [diff] [blame] | 823 | if (*hlimit < -1 || *hlimit > 0xff) { |
| 824 | err = -EINVAL; |
| 825 | goto exit_f; |
| 826 | } |
| 827 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | break; |
| 829 | |
YOSHIFUJI Hideaki | 41a1f8e | 2005-09-08 10:19:03 +0900 | [diff] [blame] | 830 | case IPV6_TCLASS: |
| 831 | { |
| 832 | int tc; |
| 833 | |
| 834 | err = -EINVAL; |
Eldad Zack | b5a4257 | 2012-04-01 07:49:03 +0000 | [diff] [blame] | 835 | if (cmsg->cmsg_len != CMSG_LEN(sizeof(int))) |
YOSHIFUJI Hideaki | 41a1f8e | 2005-09-08 10:19:03 +0900 | [diff] [blame] | 836 | goto exit_f; |
YOSHIFUJI Hideaki | 41a1f8e | 2005-09-08 10:19:03 +0900 | [diff] [blame] | 837 | |
| 838 | tc = *(int *)CMSG_DATA(cmsg); |
Remi Denis-Courmont | d0ee011 | 2006-09-13 20:08:07 -0700 | [diff] [blame] | 839 | if (tc < -1 || tc > 0xff) |
YOSHIFUJI Hideaki | 41a1f8e | 2005-09-08 10:19:03 +0900 | [diff] [blame] | 840 | goto exit_f; |
| 841 | |
| 842 | err = 0; |
| 843 | *tclass = tc; |
| 844 | |
| 845 | break; |
| 846 | } |
Brian Haley | 13b52cd | 2010-04-23 11:26:08 +0000 | [diff] [blame] | 847 | |
| 848 | case IPV6_DONTFRAG: |
| 849 | { |
| 850 | int df; |
| 851 | |
| 852 | err = -EINVAL; |
Eldad Zack | b5a4257 | 2012-04-01 07:49:03 +0000 | [diff] [blame] | 853 | if (cmsg->cmsg_len != CMSG_LEN(sizeof(int))) |
Brian Haley | 13b52cd | 2010-04-23 11:26:08 +0000 | [diff] [blame] | 854 | goto exit_f; |
Brian Haley | 13b52cd | 2010-04-23 11:26:08 +0000 | [diff] [blame] | 855 | |
| 856 | df = *(int *)CMSG_DATA(cmsg); |
| 857 | if (df < 0 || df > 1) |
| 858 | goto exit_f; |
| 859 | |
| 860 | err = 0; |
| 861 | *dontfrag = df; |
| 862 | |
| 863 | break; |
| 864 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | default: |
Patrick McHardy | 64ce207 | 2005-08-09 20:50:53 -0700 | [diff] [blame] | 866 | LIMIT_NETDEBUG(KERN_DEBUG "invalid cmsg type: %d\n", |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 867 | cmsg->cmsg_type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | err = -EINVAL; |
Miao Xie | 4a36702 | 2008-07-29 23:57:58 -0700 | [diff] [blame] | 869 | goto exit_f; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 870 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 871 | } |
| 872 | |
| 873 | exit_f: |
| 874 | return err; |
| 875 | } |
Tom Parkin | 73df66f | 2013-01-31 01:02:24 +0000 | [diff] [blame] | 876 | EXPORT_SYMBOL_GPL(ip6_datagram_send_ctl); |