Thomas Gleixner | 2874c5f | 2019-05-27 08:55:01 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | /* |
| 3 | * common UDP/RAW code |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4 | * Linux INET6 implementation |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * |
| 6 | * Authors: |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 7 | * Pedro Roque <roque@di.fc.ul.pt> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | */ |
| 9 | |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 10 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | #include <linux/errno.h> |
| 12 | #include <linux/types.h> |
| 13 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | #include <linux/interrupt.h> |
| 15 | #include <linux/socket.h> |
| 16 | #include <linux/sockios.h> |
| 17 | #include <linux/in6.h> |
| 18 | #include <linux/ipv6.h> |
| 19 | #include <linux/route.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 20 | #include <linux/slab.h> |
Chris Elston | a495f83 | 2012-04-29 21:48:53 +0000 | [diff] [blame] | 21 | #include <linux/export.h> |
Willem de Bruijn | 0137043 | 2020-07-24 09:03:10 -0400 | [diff] [blame] | 22 | #include <linux/icmp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | |
| 24 | #include <net/ipv6.h> |
| 25 | #include <net/ndisc.h> |
| 26 | #include <net/addrconf.h> |
| 27 | #include <net/transp_v6.h> |
| 28 | #include <net/ip6_route.h> |
Arnaldo Carvalho de Melo | c752f07 | 2005-08-09 20:08:28 -0700 | [diff] [blame] | 29 | #include <net/tcp_states.h> |
YOSHIFUJI Hideaki / 吉藤英明 | e721985 | 2013-01-13 05:02:01 +0000 | [diff] [blame] | 30 | #include <net/dsfield.h> |
Willem de Bruijn | acdcecc | 2019-09-12 21:16:39 -0400 | [diff] [blame] | 31 | #include <net/sock_reuseport.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | |
| 33 | #include <linux/errqueue.h> |
Linus Torvalds | 7c0f6ba | 2016-12-24 11:46:01 -0800 | [diff] [blame] | 34 | #include <linux/uaccess.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
Eric Dumazet | a50feda | 2012-05-18 18:57:34 +0000 | [diff] [blame] | 36 | static bool ipv6_mapped_addr_any(const struct in6_addr *a) |
Max Matveev | c15fea2 | 2011-08-05 03:56:30 -0700 | [diff] [blame] | 37 | { |
Eric Dumazet | a50feda | 2012-05-18 18:57:34 +0000 | [diff] [blame] | 38 | return ipv6_addr_v4mapped(a) && (a->s6_addr32[3] == 0); |
Max Matveev | c15fea2 | 2011-08-05 03:56:30 -0700 | [diff] [blame] | 39 | } |
| 40 | |
Martin KaFai Lau | 80fbdb2 | 2016-04-11 15:29:34 -0700 | [diff] [blame] | 41 | static void ip6_datagram_flow_key_init(struct flowi6 *fl6, struct sock *sk) |
| 42 | { |
| 43 | struct inet_sock *inet = inet_sk(sk); |
| 44 | struct ipv6_pinfo *np = inet6_sk(sk); |
| 45 | |
| 46 | memset(fl6, 0, sizeof(*fl6)); |
| 47 | fl6->flowi6_proto = sk->sk_protocol; |
| 48 | fl6->daddr = sk->sk_v6_daddr; |
| 49 | fl6->saddr = np->saddr; |
| 50 | fl6->flowi6_oif = sk->sk_bound_dev_if; |
| 51 | fl6->flowi6_mark = sk->sk_mark; |
| 52 | fl6->fl6_dport = inet->inet_dport; |
| 53 | fl6->fl6_sport = inet->inet_sport; |
| 54 | fl6->flowlabel = np->flow_label; |
Lorenzo Colitti | e2d118a | 2016-11-04 02:23:43 +0900 | [diff] [blame] | 55 | fl6->flowi6_uid = sk->sk_uid; |
Martin KaFai Lau | 80fbdb2 | 2016-04-11 15:29:34 -0700 | [diff] [blame] | 56 | |
| 57 | if (!fl6->flowi6_oif) |
| 58 | fl6->flowi6_oif = np->sticky_pktinfo.ipi6_ifindex; |
| 59 | |
| 60 | if (!fl6->flowi6_oif && ipv6_addr_is_multicast(&fl6->daddr)) |
| 61 | fl6->flowi6_oif = np->mcast_oif; |
| 62 | |
Paul Moore | 3df98d7 | 2020-09-27 22:38:26 -0400 | [diff] [blame] | 63 | security_sk_classify_flow(sk, flowi6_to_flowi_common(fl6)); |
Martin KaFai Lau | 80fbdb2 | 2016-04-11 15:29:34 -0700 | [diff] [blame] | 64 | } |
| 65 | |
Martin KaFai Lau | 33c162a | 2016-04-11 15:29:36 -0700 | [diff] [blame] | 66 | int ip6_datagram_dst_update(struct sock *sk, bool fix_sk_saddr) |
Martin KaFai Lau | 7e2040d | 2016-04-11 15:29:35 -0700 | [diff] [blame] | 67 | { |
| 68 | struct ip6_flowlabel *flowlabel = NULL; |
| 69 | struct in6_addr *final_p, final; |
| 70 | struct ipv6_txoptions *opt; |
| 71 | struct dst_entry *dst; |
| 72 | struct inet_sock *inet = inet_sk(sk); |
| 73 | struct ipv6_pinfo *np = inet6_sk(sk); |
| 74 | struct flowi6 fl6; |
| 75 | int err = 0; |
| 76 | |
| 77 | if (np->sndflow && (np->flow_label & IPV6_FLOWLABEL_MASK)) { |
| 78 | flowlabel = fl6_sock_lookup(sk, np->flow_label); |
Eric Dumazet | 8975a3a | 2019-07-10 06:40:10 -0700 | [diff] [blame] | 79 | if (IS_ERR(flowlabel)) |
Martin KaFai Lau | 7e2040d | 2016-04-11 15:29:35 -0700 | [diff] [blame] | 80 | return -EINVAL; |
| 81 | } |
| 82 | ip6_datagram_flow_key_init(&fl6, sk); |
| 83 | |
| 84 | rcu_read_lock(); |
| 85 | opt = flowlabel ? flowlabel->opt : rcu_dereference(np->opt); |
| 86 | final_p = fl6_update_dst(&fl6, opt, &final); |
| 87 | rcu_read_unlock(); |
| 88 | |
Sabrina Dubroca | c4e85f7 | 2019-12-04 15:35:52 +0100 | [diff] [blame] | 89 | dst = ip6_dst_lookup_flow(sock_net(sk), sk, &fl6, final_p); |
Martin KaFai Lau | 7e2040d | 2016-04-11 15:29:35 -0700 | [diff] [blame] | 90 | if (IS_ERR(dst)) { |
| 91 | err = PTR_ERR(dst); |
| 92 | goto out; |
| 93 | } |
| 94 | |
Martin KaFai Lau | 33c162a | 2016-04-11 15:29:36 -0700 | [diff] [blame] | 95 | if (fix_sk_saddr) { |
| 96 | if (ipv6_addr_any(&np->saddr)) |
| 97 | np->saddr = fl6.saddr; |
Martin KaFai Lau | 7e2040d | 2016-04-11 15:29:35 -0700 | [diff] [blame] | 98 | |
Martin KaFai Lau | 33c162a | 2016-04-11 15:29:36 -0700 | [diff] [blame] | 99 | if (ipv6_addr_any(&sk->sk_v6_rcv_saddr)) { |
| 100 | sk->sk_v6_rcv_saddr = fl6.saddr; |
| 101 | inet->inet_rcv_saddr = LOOPBACK4_IPV6; |
| 102 | if (sk->sk_prot->rehash) |
| 103 | sk->sk_prot->rehash(sk); |
| 104 | } |
Martin KaFai Lau | 7e2040d | 2016-04-11 15:29:35 -0700 | [diff] [blame] | 105 | } |
| 106 | |
Alexey Kodanev | 7d6850f | 2018-04-03 15:00:07 +0300 | [diff] [blame] | 107 | ip6_sk_dst_store_flow(sk, dst, &fl6); |
Martin KaFai Lau | 7e2040d | 2016-04-11 15:29:35 -0700 | [diff] [blame] | 108 | |
| 109 | out: |
| 110 | fl6_sock_release(flowlabel); |
| 111 | return err; |
| 112 | } |
| 113 | |
Martin KaFai Lau | e646b65 | 2016-04-11 15:29:37 -0700 | [diff] [blame] | 114 | void ip6_datagram_release_cb(struct sock *sk) |
| 115 | { |
| 116 | struct dst_entry *dst; |
| 117 | |
| 118 | if (ipv6_addr_v4mapped(&sk->sk_v6_daddr)) |
| 119 | return; |
| 120 | |
| 121 | rcu_read_lock(); |
| 122 | dst = __sk_dst_get(sk); |
| 123 | if (!dst || !dst->obsolete || |
| 124 | dst->ops->check(dst, inet6_sk(sk)->dst_cookie)) { |
| 125 | rcu_read_unlock(); |
| 126 | return; |
| 127 | } |
| 128 | rcu_read_unlock(); |
| 129 | |
| 130 | ip6_datagram_dst_update(sk, false); |
| 131 | } |
| 132 | EXPORT_SYMBOL_GPL(ip6_datagram_release_cb); |
| 133 | |
Guillaume Nault | 0382a25 | 2016-11-29 13:09:44 +0100 | [diff] [blame] | 134 | int __ip6_datagram_connect(struct sock *sk, struct sockaddr *uaddr, |
| 135 | int addr_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | { |
| 137 | struct sockaddr_in6 *usin = (struct sockaddr_in6 *) uaddr; |
Ian Morris | 67ba415 | 2014-08-24 21:53:10 +0100 | [diff] [blame] | 138 | struct inet_sock *inet = inet_sk(sk); |
| 139 | struct ipv6_pinfo *np = inet6_sk(sk); |
Paolo Abeni | 2f987a7 | 2018-03-12 14:54:23 +0100 | [diff] [blame] | 140 | struct in6_addr *daddr, old_daddr; |
| 141 | __be32 fl6_flowlabel = 0; |
| 142 | __be32 old_fl6_flowlabel; |
Stefano Brivio | 5f2fb80 | 2018-03-19 11:24:58 +0100 | [diff] [blame] | 143 | __be16 old_dport; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | int addr_type; |
| 145 | int err; |
| 146 | |
| 147 | if (usin->sin6_family == AF_INET) { |
| 148 | if (__ipv6_only_sock(sk)) |
| 149 | return -EAFNOSUPPORT; |
Eric Dumazet | 03645a1 | 2015-07-14 08:10:22 +0200 | [diff] [blame] | 150 | err = __ip4_datagram_connect(sk, uaddr, addr_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | goto ipv4_connected; |
| 152 | } |
| 153 | |
| 154 | if (addr_len < SIN6_LEN_RFC2133) |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 155 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 157 | if (usin->sin6_family != AF_INET6) |
| 158 | return -EAFNOSUPPORT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | |
Martin KaFai Lau | 7e2040d | 2016-04-11 15:29:35 -0700 | [diff] [blame] | 160 | if (np->sndflow) |
Martin KaFai Lau | 80fbdb2 | 2016-04-11 15:29:34 -0700 | [diff] [blame] | 161 | fl6_flowlabel = usin->sin6_flowinfo & IPV6_FLOWINFO_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | |
Jonathan T. Leighton | 052d236 | 2017-02-12 17:26:07 -0500 | [diff] [blame] | 163 | if (ipv6_addr_any(&usin->sin6_addr)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | /* |
| 165 | * connect to self |
| 166 | */ |
Jonathan T. Leighton | 052d236 | 2017-02-12 17:26:07 -0500 | [diff] [blame] | 167 | if (ipv6_addr_v4mapped(&sk->sk_v6_rcv_saddr)) |
| 168 | ipv6_addr_set_v4mapped(htonl(INADDR_LOOPBACK), |
| 169 | &usin->sin6_addr); |
| 170 | else |
| 171 | usin->sin6_addr = in6addr_loopback; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | } |
| 173 | |
Jonathan T. Leighton | 052d236 | 2017-02-12 17:26:07 -0500 | [diff] [blame] | 174 | addr_type = ipv6_addr_type(&usin->sin6_addr); |
| 175 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | daddr = &usin->sin6_addr; |
| 177 | |
Jonathan T. Leighton | 052d236 | 2017-02-12 17:26:07 -0500 | [diff] [blame] | 178 | if (addr_type & IPV6_ADDR_MAPPED) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | struct sockaddr_in sin; |
| 180 | |
| 181 | if (__ipv6_only_sock(sk)) { |
| 182 | err = -ENETUNREACH; |
| 183 | goto out; |
| 184 | } |
| 185 | sin.sin_family = AF_INET; |
| 186 | sin.sin_addr.s_addr = daddr->s6_addr32[3]; |
| 187 | sin.sin_port = usin->sin6_port; |
| 188 | |
Eric Dumazet | 03645a1 | 2015-07-14 08:10:22 +0200 | [diff] [blame] | 189 | err = __ip4_datagram_connect(sk, |
| 190 | (struct sockaddr *) &sin, |
| 191 | sizeof(sin)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | |
| 193 | ipv4_connected: |
| 194 | if (err) |
| 195 | goto out; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 196 | |
Eric Dumazet | efe4208 | 2013-10-03 15:42:29 -0700 | [diff] [blame] | 197 | ipv6_addr_set_v4mapped(inet->inet_daddr, &sk->sk_v6_daddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | |
Max Matveev | c15fea2 | 2011-08-05 03:56:30 -0700 | [diff] [blame] | 199 | if (ipv6_addr_any(&np->saddr) || |
| 200 | ipv6_mapped_addr_any(&np->saddr)) |
Eric Dumazet | c720c7e8 | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 201 | ipv6_addr_set_v4mapped(inet->inet_saddr, &np->saddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | |
Eric Dumazet | efe4208 | 2013-10-03 15:42:29 -0700 | [diff] [blame] | 203 | if (ipv6_addr_any(&sk->sk_v6_rcv_saddr) || |
| 204 | ipv6_mapped_addr_any(&sk->sk_v6_rcv_saddr)) { |
Eric Dumazet | c720c7e8 | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 205 | ipv6_addr_set_v4mapped(inet->inet_rcv_saddr, |
Eric Dumazet | efe4208 | 2013-10-03 15:42:29 -0700 | [diff] [blame] | 206 | &sk->sk_v6_rcv_saddr); |
Eric Dumazet | 719f835 | 2010-09-08 05:08:44 +0000 | [diff] [blame] | 207 | if (sk->sk_prot->rehash) |
| 208 | sk->sk_prot->rehash(sk); |
| 209 | } |
Brian Haley | b301e82 | 2009-10-07 13:58:25 -0700 | [diff] [blame] | 210 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | goto out; |
| 212 | } |
| 213 | |
Hannes Frederic Sowa | 842df07 | 2013-03-08 02:07:19 +0000 | [diff] [blame] | 214 | if (__ipv6_addr_needs_scope_id(addr_type)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | if (addr_len >= sizeof(struct sockaddr_in6) && |
| 216 | usin->sin6_scope_id) { |
David Ahern | 54dc3e3 | 2018-01-04 14:03:54 -0800 | [diff] [blame] | 217 | if (!sk_dev_equal_l3scope(sk, usin->sin6_scope_id)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | err = -EINVAL; |
| 219 | goto out; |
| 220 | } |
| 221 | sk->sk_bound_dev_if = usin->sin6_scope_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | } |
| 223 | |
Brian Haley | 1ac4f00 | 2008-01-08 23:52:21 -0800 | [diff] [blame] | 224 | if (!sk->sk_bound_dev_if && (addr_type & IPV6_ADDR_MULTICAST)) |
| 225 | sk->sk_bound_dev_if = np->mcast_oif; |
| 226 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | /* Connect to link-local address requires an interface */ |
| 228 | if (!sk->sk_bound_dev_if) { |
| 229 | err = -EINVAL; |
| 230 | goto out; |
| 231 | } |
| 232 | } |
| 233 | |
Paolo Abeni | 2f987a7 | 2018-03-12 14:54:23 +0100 | [diff] [blame] | 234 | /* save the current peer information before updating it */ |
| 235 | old_daddr = sk->sk_v6_daddr; |
| 236 | old_fl6_flowlabel = np->flow_label; |
| 237 | old_dport = inet->inet_dport; |
| 238 | |
Eric Dumazet | efe4208 | 2013-10-03 15:42:29 -0700 | [diff] [blame] | 239 | sk->sk_v6_daddr = *daddr; |
Martin KaFai Lau | 80fbdb2 | 2016-04-11 15:29:34 -0700 | [diff] [blame] | 240 | np->flow_label = fl6_flowlabel; |
Eric Dumazet | c720c7e8 | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 241 | inet->inet_dport = usin->sin6_port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | |
| 243 | /* |
| 244 | * Check for a route to destination an obtain the |
| 245 | * destination cache for it. |
| 246 | */ |
| 247 | |
Martin KaFai Lau | 33c162a | 2016-04-11 15:29:36 -0700 | [diff] [blame] | 248 | err = ip6_datagram_dst_update(sk, true); |
Wei Wang | 85cb73f | 2017-06-23 15:25:37 -0700 | [diff] [blame] | 249 | if (err) { |
Paolo Abeni | 2f987a7 | 2018-03-12 14:54:23 +0100 | [diff] [blame] | 250 | /* Restore the socket peer info, to keep it consistent with |
| 251 | * the old socket state |
Wei Wang | 85cb73f | 2017-06-23 15:25:37 -0700 | [diff] [blame] | 252 | */ |
Paolo Abeni | 2f987a7 | 2018-03-12 14:54:23 +0100 | [diff] [blame] | 253 | sk->sk_v6_daddr = old_daddr; |
| 254 | np->flow_label = old_fl6_flowlabel; |
| 255 | inet->inet_dport = old_dport; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | goto out; |
Wei Wang | 85cb73f | 2017-06-23 15:25:37 -0700 | [diff] [blame] | 257 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | |
Willem de Bruijn | acdcecc | 2019-09-12 21:16:39 -0400 | [diff] [blame] | 259 | reuseport_has_conns(sk, true); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | sk->sk_state = TCP_ESTABLISHED; |
Tom Herbert | 877d1f6 | 2015-07-28 16:02:05 -0700 | [diff] [blame] | 261 | sk_set_txhash(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | return err; |
| 264 | } |
Guillaume Nault | 0382a25 | 2016-11-29 13:09:44 +0100 | [diff] [blame] | 265 | EXPORT_SYMBOL_GPL(__ip6_datagram_connect); |
Eric Dumazet | 03645a1 | 2015-07-14 08:10:22 +0200 | [diff] [blame] | 266 | |
| 267 | int ip6_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len) |
| 268 | { |
| 269 | int res; |
| 270 | |
| 271 | lock_sock(sk); |
| 272 | res = __ip6_datagram_connect(sk, uaddr, addr_len); |
| 273 | release_sock(sk); |
| 274 | return res; |
| 275 | } |
Chris Elston | a495f83 | 2012-04-29 21:48:53 +0000 | [diff] [blame] | 276 | EXPORT_SYMBOL_GPL(ip6_datagram_connect); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | |
Hannes Frederic Sowa | 82b276c | 2014-01-20 05:16:39 +0100 | [diff] [blame] | 278 | int ip6_datagram_connect_v6_only(struct sock *sk, struct sockaddr *uaddr, |
| 279 | int addr_len) |
| 280 | { |
| 281 | DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, uaddr); |
| 282 | if (sin6->sin6_family != AF_INET6) |
| 283 | return -EAFNOSUPPORT; |
| 284 | return ip6_datagram_connect(sk, uaddr, addr_len); |
| 285 | } |
| 286 | EXPORT_SYMBOL_GPL(ip6_datagram_connect_v6_only); |
| 287 | |
Willem de Bruijn | 0137043 | 2020-07-24 09:03:10 -0400 | [diff] [blame] | 288 | static void ipv6_icmp_error_rfc4884(const struct sk_buff *skb, |
| 289 | struct sock_ee_data_rfc4884 *out) |
| 290 | { |
| 291 | switch (icmp6_hdr(skb)->icmp6_type) { |
| 292 | case ICMPV6_TIME_EXCEED: |
| 293 | case ICMPV6_DEST_UNREACH: |
| 294 | ip_icmp_error_rfc4884(skb, out, sizeof(struct icmp6hdr), |
| 295 | icmp6_hdr(skb)->icmp6_datagram_len * 8); |
| 296 | } |
| 297 | } |
| 298 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 299 | 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] | 300 | __be16 port, u32 info, u8 *payload) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | { |
| 302 | struct ipv6_pinfo *np = inet6_sk(sk); |
Arnaldo Carvalho de Melo | cc70ab2 | 2007-03-13 14:03:22 -0300 | [diff] [blame] | 303 | struct icmp6hdr *icmph = icmp6_hdr(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | struct sock_exterr_skb *serr; |
| 305 | |
| 306 | if (!np->recverr) |
| 307 | return; |
| 308 | |
| 309 | skb = skb_clone(skb, GFP_ATOMIC); |
| 310 | if (!skb) |
| 311 | return; |
| 312 | |
Brian Haley | d40a4de | 2010-05-03 15:44:27 +0000 | [diff] [blame] | 313 | skb->protocol = htons(ETH_P_IPV6); |
| 314 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | serr = SKB_EXT_ERR(skb); |
| 316 | serr->ee.ee_errno = err; |
| 317 | serr->ee.ee_origin = SO_EE_ORIGIN_ICMP6; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 318 | serr->ee.ee_type = icmph->icmp6_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | serr->ee.ee_code = icmph->icmp6_code; |
| 320 | serr->ee.ee_pad = 0; |
| 321 | serr->ee.ee_info = info; |
| 322 | serr->ee.ee_data = 0; |
Arnaldo Carvalho de Melo | d56f90a | 2007-04-10 20:50:43 -0700 | [diff] [blame] | 323 | serr->addr_offset = (u8 *)&(((struct ipv6hdr *)(icmph + 1))->daddr) - |
| 324 | skb_network_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | serr->port = port; |
| 326 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | __skb_pull(skb, payload - skb->data); |
Willem de Bruijn | 0137043 | 2020-07-24 09:03:10 -0400 | [diff] [blame] | 328 | |
| 329 | if (inet6_sk(sk)->recverr_rfc4884) |
| 330 | ipv6_icmp_error_rfc4884(skb, &serr->ee.ee_rfc4884); |
| 331 | |
Arnaldo Carvalho de Melo | bd82393 | 2007-03-13 17:10:43 -0300 | [diff] [blame] | 332 | skb_reset_transport_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | |
| 334 | if (sock_queue_err_skb(sk, skb)) |
| 335 | kfree_skb(skb); |
| 336 | } |
| 337 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 338 | 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] | 339 | { |
Eric Dumazet | 1c1e9d2 | 2015-09-25 07:39:20 -0700 | [diff] [blame] | 340 | const struct ipv6_pinfo *np = inet6_sk(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | struct sock_exterr_skb *serr; |
| 342 | struct ipv6hdr *iph; |
| 343 | struct sk_buff *skb; |
| 344 | |
| 345 | if (!np->recverr) |
| 346 | return; |
| 347 | |
| 348 | skb = alloc_skb(sizeof(struct ipv6hdr), GFP_ATOMIC); |
| 349 | if (!skb) |
| 350 | return; |
| 351 | |
Brian Haley | d40a4de | 2010-05-03 15:44:27 +0000 | [diff] [blame] | 352 | skb->protocol = htons(ETH_P_IPV6); |
| 353 | |
Arnaldo Carvalho de Melo | 1ced98e | 2007-03-10 19:57:15 -0300 | [diff] [blame] | 354 | skb_put(skb, sizeof(struct ipv6hdr)); |
| 355 | skb_reset_network_header(skb); |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 356 | iph = ipv6_hdr(skb); |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 357 | iph->daddr = fl6->daddr; |
Eric Dumazet | 7d033c9 | 2019-01-08 04:06:14 -0800 | [diff] [blame] | 358 | ip6_flow_hdr(iph, 0, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | |
| 360 | serr = SKB_EXT_ERR(skb); |
| 361 | serr->ee.ee_errno = err; |
| 362 | serr->ee.ee_origin = SO_EE_ORIGIN_LOCAL; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 363 | serr->ee.ee_type = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | serr->ee.ee_code = 0; |
| 365 | serr->ee.ee_pad = 0; |
| 366 | serr->ee.ee_info = info; |
| 367 | serr->ee.ee_data = 0; |
Arnaldo Carvalho de Melo | d56f90a | 2007-04-10 20:50:43 -0700 | [diff] [blame] | 368 | serr->addr_offset = (u8 *)&iph->daddr - skb_network_header(skb); |
David S. Miller | 1958b85 | 2011-03-12 16:36:19 -0500 | [diff] [blame] | 369 | serr->port = fl6->fl6_dport; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 371 | __skb_pull(skb, skb_tail_pointer(skb) - skb->data); |
Arnaldo Carvalho de Melo | bd82393 | 2007-03-13 17:10:43 -0300 | [diff] [blame] | 372 | skb_reset_transport_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | |
| 374 | if (sock_queue_err_skb(sk, skb)) |
| 375 | kfree_skb(skb); |
| 376 | } |
| 377 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 378 | void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu) |
Brian Haley | 4b340ae | 2010-04-23 11:26:09 +0000 | [diff] [blame] | 379 | { |
| 380 | struct ipv6_pinfo *np = inet6_sk(sk); |
| 381 | struct ipv6hdr *iph; |
| 382 | struct sk_buff *skb; |
| 383 | struct ip6_mtuinfo *mtu_info; |
| 384 | |
| 385 | if (!np->rxopt.bits.rxpmtu) |
| 386 | return; |
| 387 | |
| 388 | skb = alloc_skb(sizeof(struct ipv6hdr), GFP_ATOMIC); |
| 389 | if (!skb) |
| 390 | return; |
| 391 | |
| 392 | skb_put(skb, sizeof(struct ipv6hdr)); |
| 393 | skb_reset_network_header(skb); |
| 394 | iph = ipv6_hdr(skb); |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 395 | iph->daddr = fl6->daddr; |
Brian Haley | 4b340ae | 2010-04-23 11:26:09 +0000 | [diff] [blame] | 396 | |
| 397 | mtu_info = IP6CBMTU(skb); |
Brian Haley | 4b340ae | 2010-04-23 11:26:09 +0000 | [diff] [blame] | 398 | |
| 399 | mtu_info->ip6m_mtu = mtu; |
| 400 | mtu_info->ip6m_addr.sin6_family = AF_INET6; |
| 401 | mtu_info->ip6m_addr.sin6_port = 0; |
| 402 | mtu_info->ip6m_addr.sin6_flowinfo = 0; |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 403 | mtu_info->ip6m_addr.sin6_scope_id = fl6->flowi6_oif; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 404 | mtu_info->ip6m_addr.sin6_addr = ipv6_hdr(skb)->daddr; |
Brian Haley | 4b340ae | 2010-04-23 11:26:09 +0000 | [diff] [blame] | 405 | |
| 406 | __skb_pull(skb, skb_tail_pointer(skb) - skb->data); |
| 407 | skb_reset_transport_header(skb); |
| 408 | |
| 409 | skb = xchg(&np->rxpmtu, skb); |
| 410 | kfree_skb(skb); |
| 411 | } |
| 412 | |
Julian Anastasov | 34b99df | 2015-06-23 08:34:39 +0300 | [diff] [blame] | 413 | /* For some errors we have valid addr_offset even with zero payload and |
| 414 | * zero port. Also, addr_offset should be supported if port is set. |
| 415 | */ |
| 416 | static inline bool ipv6_datagram_support_addr(struct sock_exterr_skb *serr) |
| 417 | { |
| 418 | return serr->ee.ee_origin == SO_EE_ORIGIN_ICMP6 || |
| 419 | serr->ee.ee_origin == SO_EE_ORIGIN_ICMP || |
| 420 | serr->ee.ee_origin == SO_EE_ORIGIN_LOCAL || serr->port; |
| 421 | } |
| 422 | |
Willem de Bruijn | c247f05 | 2015-03-07 20:33:22 -0500 | [diff] [blame] | 423 | /* IPv6 supports cmsg on all origins aside from SO_EE_ORIGIN_LOCAL. |
| 424 | * |
| 425 | * At one point, excluding local errors was a quick test to identify icmp/icmp6 |
| 426 | * errors. This is no longer true, but the test remained, so the v6 stack, |
| 427 | * unlike v4, also honors cmsg requests on all wifi and timestamp errors. |
Willem de Bruijn | c247f05 | 2015-03-07 20:33:22 -0500 | [diff] [blame] | 428 | */ |
| 429 | static bool ip6_datagram_support_cmsg(struct sk_buff *skb, |
| 430 | struct sock_exterr_skb *serr) |
Willem de Bruijn | 829ae9d | 2014-11-30 22:22:34 -0500 | [diff] [blame] | 431 | { |
Willem de Bruijn | c247f05 | 2015-03-07 20:33:22 -0500 | [diff] [blame] | 432 | if (serr->ee.ee_origin == SO_EE_ORIGIN_ICMP || |
| 433 | serr->ee.ee_origin == SO_EE_ORIGIN_ICMP6) |
| 434 | return true; |
| 435 | |
| 436 | if (serr->ee.ee_origin == SO_EE_ORIGIN_LOCAL) |
| 437 | return false; |
| 438 | |
Willem de Bruijn | 1862d62 | 2017-04-12 19:24:35 -0400 | [diff] [blame] | 439 | if (!IP6CB(skb)->iif) |
Willem de Bruijn | c247f05 | 2015-03-07 20:33:22 -0500 | [diff] [blame] | 440 | return false; |
Willem de Bruijn | 829ae9d | 2014-11-30 22:22:34 -0500 | [diff] [blame] | 441 | |
Willem de Bruijn | c247f05 | 2015-03-07 20:33:22 -0500 | [diff] [blame] | 442 | return true; |
Willem de Bruijn | 829ae9d | 2014-11-30 22:22:34 -0500 | [diff] [blame] | 443 | } |
| 444 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 445 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | * Handle MSG_ERRQUEUE |
| 447 | */ |
Hannes Frederic Sowa | 85fbaa7 | 2013-11-23 00:46:12 +0100 | [diff] [blame] | 448 | int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | { |
| 450 | struct ipv6_pinfo *np = inet6_sk(sk); |
| 451 | struct sock_exterr_skb *serr; |
Willem de Bruijn | 364a9e9 | 2014-08-31 21:30:27 -0400 | [diff] [blame] | 452 | struct sk_buff *skb; |
Steffen Hurrle | 342dfc3 | 2014-01-17 22:53:15 +0100 | [diff] [blame] | 453 | DECLARE_SOCKADDR(struct sockaddr_in6 *, sin, msg->msg_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | struct { |
| 455 | struct sock_extended_err ee; |
| 456 | struct sockaddr_in6 offender; |
| 457 | } errhdr; |
| 458 | int err; |
| 459 | int copied; |
| 460 | |
| 461 | err = -EAGAIN; |
Willem de Bruijn | 364a9e9 | 2014-08-31 21:30:27 -0400 | [diff] [blame] | 462 | skb = sock_dequeue_err_skb(sk); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 463 | if (!skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | goto out; |
| 465 | |
| 466 | copied = skb->len; |
| 467 | if (copied > len) { |
| 468 | msg->msg_flags |= MSG_TRUNC; |
| 469 | copied = len; |
| 470 | } |
David S. Miller | 51f3d02 | 2014-11-05 16:46:40 -0500 | [diff] [blame] | 471 | err = skb_copy_datagram_msg(skb, 0, msg, copied); |
Eric Dumazet | 960a262 | 2016-04-21 22:27:32 -0700 | [diff] [blame] | 472 | if (unlikely(err)) { |
| 473 | kfree_skb(skb); |
| 474 | return err; |
| 475 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | sock_recv_timestamp(msg, sk, skb); |
| 477 | |
| 478 | serr = SKB_EXT_ERR(skb); |
| 479 | |
Julian Anastasov | 34b99df | 2015-06-23 08:34:39 +0300 | [diff] [blame] | 480 | if (sin && ipv6_datagram_support_addr(serr)) { |
Arnaldo Carvalho de Melo | d56f90a | 2007-04-10 20:50:43 -0700 | [diff] [blame] | 481 | const unsigned char *nh = skb_network_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | sin->sin6_family = AF_INET6; |
| 483 | sin->sin6_flowinfo = 0; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 484 | sin->sin6_port = serr->port; |
Brian Haley | d40a4de | 2010-05-03 15:44:27 +0000 | [diff] [blame] | 485 | if (skb->protocol == htons(ETH_P_IPV6)) { |
YOSHIFUJI Hideaki / 吉藤英明 | 6c40d10 | 2013-01-08 06:44:23 +0000 | [diff] [blame] | 486 | const struct ipv6hdr *ip6h = container_of((struct in6_addr *)(nh + serr->addr_offset), |
| 487 | struct ipv6hdr, daddr); |
| 488 | sin->sin6_addr = ip6h->daddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | if (np->sndflow) |
YOSHIFUJI Hideaki / 吉藤英明 | 6502ca5 | 2013-01-13 05:01:51 +0000 | [diff] [blame] | 490 | sin->sin6_flowinfo = ip6_flowinfo(ip6h); |
Hannes Frederic Sowa | 842df07 | 2013-03-08 02:07:19 +0000 | [diff] [blame] | 491 | sin->sin6_scope_id = |
| 492 | ipv6_iface_scope_id(&sin->sin6_addr, |
| 493 | IP6CB(skb)->iif); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | } else { |
Brian Haley | b301e82 | 2009-10-07 13:58:25 -0700 | [diff] [blame] | 495 | ipv6_addr_set_v4mapped(*(__be32 *)(nh + serr->addr_offset), |
| 496 | &sin->sin6_addr); |
Hannes Frederic Sowa | 842df07 | 2013-03-08 02:07:19 +0000 | [diff] [blame] | 497 | sin->sin6_scope_id = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | } |
Hannes Frederic Sowa | 85fbaa7 | 2013-11-23 00:46:12 +0100 | [diff] [blame] | 499 | *addr_len = sizeof(*sin); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | } |
| 501 | |
| 502 | memcpy(&errhdr.ee, &serr->ee, sizeof(struct sock_extended_err)); |
| 503 | sin = &errhdr.offender; |
Willem de Bruijn | f812116 | 2015-01-15 13:18:40 -0500 | [diff] [blame] | 504 | memset(sin, 0, sizeof(*sin)); |
Willem de Bruijn | c247f05 | 2015-03-07 20:33:22 -0500 | [diff] [blame] | 505 | |
| 506 | if (ip6_datagram_support_cmsg(skb, serr)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | sin->sin6_family = AF_INET6; |
Willem de Bruijn | c247f05 | 2015-03-07 20:33:22 -0500 | [diff] [blame] | 508 | if (np->rxopt.all) |
Hannes Frederic Sowa | 4b261c75 | 2014-01-20 03:43:08 +0100 | [diff] [blame] | 509 | ip6_datagram_recv_common_ctl(sk, msg, skb); |
Brian Haley | d40a4de | 2010-05-03 15:44:27 +0000 | [diff] [blame] | 510 | if (skb->protocol == htons(ETH_P_IPV6)) { |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 511 | sin->sin6_addr = ipv6_hdr(skb)->saddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | if (np->rxopt.all) |
Hannes Frederic Sowa | 4b261c75 | 2014-01-20 03:43:08 +0100 | [diff] [blame] | 513 | ip6_datagram_recv_specific_ctl(sk, msg, skb); |
Hannes Frederic Sowa | 842df07 | 2013-03-08 02:07:19 +0000 | [diff] [blame] | 514 | sin->sin6_scope_id = |
| 515 | ipv6_iface_scope_id(&sin->sin6_addr, |
| 516 | IP6CB(skb)->iif); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | } else { |
Brian Haley | b301e82 | 2009-10-07 13:58:25 -0700 | [diff] [blame] | 518 | ipv6_addr_set_v4mapped(ip_hdr(skb)->saddr, |
| 519 | &sin->sin6_addr); |
Willem de Bruijn | f812116 | 2015-01-15 13:18:40 -0500 | [diff] [blame] | 520 | if (inet_sk(sk)->cmsg_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | ip_cmsg_recv(msg, skb); |
| 522 | } |
| 523 | } |
| 524 | |
| 525 | put_cmsg(msg, SOL_IPV6, IPV6_RECVERR, sizeof(errhdr), &errhdr); |
| 526 | |
| 527 | /* Now we could try to dump offended packet options */ |
| 528 | |
| 529 | msg->msg_flags |= MSG_ERRQUEUE; |
| 530 | err = copied; |
| 531 | |
Eric Dumazet | 960a262 | 2016-04-21 22:27:32 -0700 | [diff] [blame] | 532 | consume_skb(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | out: |
| 534 | return err; |
| 535 | } |
Chris Elston | a495f83 | 2012-04-29 21:48:53 +0000 | [diff] [blame] | 536 | EXPORT_SYMBOL_GPL(ipv6_recv_error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | |
Brian Haley | 4b340ae | 2010-04-23 11:26:09 +0000 | [diff] [blame] | 538 | /* |
| 539 | * Handle IPV6_RECVPATHMTU |
| 540 | */ |
Hannes Frederic Sowa | 85fbaa7 | 2013-11-23 00:46:12 +0100 | [diff] [blame] | 541 | int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len, |
| 542 | int *addr_len) |
Brian Haley | 4b340ae | 2010-04-23 11:26:09 +0000 | [diff] [blame] | 543 | { |
| 544 | struct ipv6_pinfo *np = inet6_sk(sk); |
| 545 | struct sk_buff *skb; |
Brian Haley | 4b340ae | 2010-04-23 11:26:09 +0000 | [diff] [blame] | 546 | struct ip6_mtuinfo mtu_info; |
Steffen Hurrle | 342dfc3 | 2014-01-17 22:53:15 +0100 | [diff] [blame] | 547 | DECLARE_SOCKADDR(struct sockaddr_in6 *, sin, msg->msg_name); |
Brian Haley | 4b340ae | 2010-04-23 11:26:09 +0000 | [diff] [blame] | 548 | int err; |
| 549 | int copied; |
| 550 | |
| 551 | err = -EAGAIN; |
| 552 | skb = xchg(&np->rxpmtu, NULL); |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 553 | if (!skb) |
Brian Haley | 4b340ae | 2010-04-23 11:26:09 +0000 | [diff] [blame] | 554 | goto out; |
| 555 | |
| 556 | copied = skb->len; |
| 557 | if (copied > len) { |
| 558 | msg->msg_flags |= MSG_TRUNC; |
| 559 | copied = len; |
| 560 | } |
David S. Miller | 51f3d02 | 2014-11-05 16:46:40 -0500 | [diff] [blame] | 561 | err = skb_copy_datagram_msg(skb, 0, msg, copied); |
Brian Haley | 4b340ae | 2010-04-23 11:26:09 +0000 | [diff] [blame] | 562 | if (err) |
| 563 | goto out_free_skb; |
| 564 | |
| 565 | sock_recv_timestamp(msg, sk, skb); |
| 566 | |
| 567 | memcpy(&mtu_info, IP6CBMTU(skb), sizeof(mtu_info)); |
| 568 | |
Brian Haley | 4b340ae | 2010-04-23 11:26:09 +0000 | [diff] [blame] | 569 | if (sin) { |
| 570 | sin->sin6_family = AF_INET6; |
| 571 | sin->sin6_flowinfo = 0; |
| 572 | sin->sin6_port = 0; |
| 573 | sin->sin6_scope_id = mtu_info.ip6m_addr.sin6_scope_id; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 574 | sin->sin6_addr = mtu_info.ip6m_addr.sin6_addr; |
Hannes Frederic Sowa | 85fbaa7 | 2013-11-23 00:46:12 +0100 | [diff] [blame] | 575 | *addr_len = sizeof(*sin); |
Brian Haley | 4b340ae | 2010-04-23 11:26:09 +0000 | [diff] [blame] | 576 | } |
| 577 | |
| 578 | put_cmsg(msg, SOL_IPV6, IPV6_PATHMTU, sizeof(mtu_info), &mtu_info); |
| 579 | |
| 580 | err = copied; |
| 581 | |
| 582 | out_free_skb: |
| 583 | kfree_skb(skb); |
| 584 | out: |
| 585 | return err; |
| 586 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | |
| 588 | |
Hannes Frederic Sowa | 4b261c75 | 2014-01-20 03:43:08 +0100 | [diff] [blame] | 589 | void ip6_datagram_recv_common_ctl(struct sock *sk, struct msghdr *msg, |
| 590 | struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | { |
| 592 | struct ipv6_pinfo *np = inet6_sk(sk); |
Hannes Frederic Sowa | 4b261c75 | 2014-01-20 03:43:08 +0100 | [diff] [blame] | 593 | bool is_ipv6 = skb->protocol == htons(ETH_P_IPV6); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | |
| 595 | if (np->rxopt.bits.rxinfo) { |
| 596 | struct in6_pktinfo src_info; |
| 597 | |
Hannes Frederic Sowa | 4b261c75 | 2014-01-20 03:43:08 +0100 | [diff] [blame] | 598 | if (is_ipv6) { |
| 599 | src_info.ipi6_ifindex = IP6CB(skb)->iif; |
| 600 | src_info.ipi6_addr = ipv6_hdr(skb)->daddr; |
| 601 | } else { |
| 602 | src_info.ipi6_ifindex = |
| 603 | PKTINFO_SKB_CB(skb)->ipi_ifindex; |
| 604 | ipv6_addr_set_v4mapped(ip_hdr(skb)->daddr, |
| 605 | &src_info.ipi6_addr); |
| 606 | } |
Willem de Bruijn | 829ae9d | 2014-11-30 22:22:34 -0500 | [diff] [blame] | 607 | |
| 608 | if (src_info.ipi6_ifindex >= 0) |
| 609 | put_cmsg(msg, SOL_IPV6, IPV6_PKTINFO, |
| 610 | sizeof(src_info), &src_info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | } |
Hannes Frederic Sowa | 4b261c75 | 2014-01-20 03:43:08 +0100 | [diff] [blame] | 612 | } |
| 613 | |
| 614 | void ip6_datagram_recv_specific_ctl(struct sock *sk, struct msghdr *msg, |
| 615 | struct sk_buff *skb) |
| 616 | { |
| 617 | struct ipv6_pinfo *np = inet6_sk(sk); |
| 618 | struct inet6_skb_parm *opt = IP6CB(skb); |
| 619 | unsigned char *nh = skb_network_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | |
| 621 | if (np->rxopt.bits.rxhlim) { |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 622 | int hlim = ipv6_hdr(skb)->hop_limit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | put_cmsg(msg, SOL_IPV6, IPV6_HOPLIMIT, sizeof(hlim), &hlim); |
| 624 | } |
| 625 | |
YOSHIFUJI Hideaki | 41a1f8e | 2005-09-08 10:19:03 +0900 | [diff] [blame] | 626 | if (np->rxopt.bits.rxtclass) { |
YOSHIFUJI Hideaki / 吉藤英明 | e721985 | 2013-01-13 05:02:01 +0000 | [diff] [blame] | 627 | int tclass = ipv6_get_dsfield(ipv6_hdr(skb)); |
YOSHIFUJI Hideaki | 41a1f8e | 2005-09-08 10:19:03 +0900 | [diff] [blame] | 628 | put_cmsg(msg, SOL_IPV6, IPV6_TCLASS, sizeof(tclass), &tclass); |
| 629 | } |
| 630 | |
YOSHIFUJI Hideaki / 吉藤英明 | 6502ca5 | 2013-01-13 05:01:51 +0000 | [diff] [blame] | 631 | if (np->rxopt.bits.rxflow) { |
| 632 | __be32 flowinfo = ip6_flowinfo((struct ipv6hdr *)nh); |
| 633 | if (flowinfo) |
| 634 | put_cmsg(msg, SOL_IPV6, IPV6_FLOWINFO, sizeof(flowinfo), &flowinfo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | } |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 636 | |
| 637 | /* HbH is allowed only once */ |
Florian Westphal | 8b58a39 | 2015-07-08 23:32:12 +0200 | [diff] [blame] | 638 | if (np->rxopt.bits.hopopts && (opt->flags & IP6SKB_HOPBYHOP)) { |
| 639 | u8 *ptr = nh + sizeof(struct ipv6hdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | put_cmsg(msg, SOL_IPV6, IPV6_HOPOPTS, (ptr[1]+1)<<3, ptr); |
| 641 | } |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 642 | |
| 643 | if (opt->lastopt && |
| 644 | (np->rxopt.bits.dstopts || np->rxopt.bits.srcrt)) { |
| 645 | /* |
| 646 | * Silly enough, but we need to reparse in order to |
| 647 | * report extension headers (except for HbH) |
| 648 | * in order. |
| 649 | * |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 650 | * Also note that IPV6_RECVRTHDRDSTOPTS is NOT |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 651 | * (and WILL NOT be) defined because |
| 652 | * IPV6_RECVDSTOPTS is more generic. --yoshfuji |
| 653 | */ |
| 654 | unsigned int off = sizeof(struct ipv6hdr); |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 655 | u8 nexthdr = ipv6_hdr(skb)->nexthdr; |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 656 | |
| 657 | while (off <= opt->lastopt) { |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 658 | unsigned int len; |
Arnaldo Carvalho de Melo | d56f90a | 2007-04-10 20:50:43 -0700 | [diff] [blame] | 659 | u8 *ptr = nh + off; |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 660 | |
Eldad Zack | b5a4257 | 2012-04-01 07:49:03 +0000 | [diff] [blame] | 661 | switch (nexthdr) { |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 662 | case IPPROTO_DSTOPTS: |
| 663 | nexthdr = ptr[0]; |
| 664 | len = (ptr[1] + 1) << 3; |
| 665 | if (np->rxopt.bits.dstopts) |
| 666 | put_cmsg(msg, SOL_IPV6, IPV6_DSTOPTS, len, ptr); |
| 667 | break; |
| 668 | case IPPROTO_ROUTING: |
| 669 | nexthdr = ptr[0]; |
| 670 | len = (ptr[1] + 1) << 3; |
| 671 | if (np->rxopt.bits.srcrt) |
| 672 | put_cmsg(msg, SOL_IPV6, IPV6_RTHDR, len, ptr); |
| 673 | break; |
| 674 | case IPPROTO_AH: |
| 675 | nexthdr = ptr[0]; |
Ville Nuorvala | a305989 | 2005-11-20 12:21:59 +0900 | [diff] [blame] | 676 | len = (ptr[1] + 2) << 2; |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 677 | break; |
| 678 | default: |
| 679 | nexthdr = ptr[0]; |
| 680 | len = (ptr[1] + 1) << 3; |
| 681 | break; |
| 682 | } |
| 683 | |
| 684 | off += len; |
| 685 | } |
| 686 | } |
| 687 | |
| 688 | /* socket options in old style */ |
| 689 | if (np->rxopt.bits.rxoinfo) { |
| 690 | struct in6_pktinfo src_info; |
| 691 | |
| 692 | src_info.ipi6_ifindex = opt->iif; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 693 | src_info.ipi6_addr = ipv6_hdr(skb)->daddr; |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 694 | put_cmsg(msg, SOL_IPV6, IPV6_2292PKTINFO, sizeof(src_info), &src_info); |
| 695 | } |
| 696 | if (np->rxopt.bits.rxohlim) { |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 697 | int hlim = ipv6_hdr(skb)->hop_limit; |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 698 | put_cmsg(msg, SOL_IPV6, IPV6_2292HOPLIMIT, sizeof(hlim), &hlim); |
| 699 | } |
Florian Westphal | 8b58a39 | 2015-07-08 23:32:12 +0200 | [diff] [blame] | 700 | if (np->rxopt.bits.ohopopts && (opt->flags & IP6SKB_HOPBYHOP)) { |
| 701 | u8 *ptr = nh + sizeof(struct ipv6hdr); |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 702 | put_cmsg(msg, SOL_IPV6, IPV6_2292HOPOPTS, (ptr[1]+1)<<3, ptr); |
| 703 | } |
| 704 | if (np->rxopt.bits.odstopts && opt->dst0) { |
Arnaldo Carvalho de Melo | d56f90a | 2007-04-10 20:50:43 -0700 | [diff] [blame] | 705 | u8 *ptr = nh + opt->dst0; |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 706 | put_cmsg(msg, SOL_IPV6, IPV6_2292DSTOPTS, (ptr[1]+1)<<3, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | } |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 708 | if (np->rxopt.bits.osrcrt && opt->srcrt) { |
Arnaldo Carvalho de Melo | d56f90a | 2007-04-10 20:50:43 -0700 | [diff] [blame] | 709 | struct ipv6_rt_hdr *rthdr = (struct ipv6_rt_hdr *)(nh + opt->srcrt); |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 710 | put_cmsg(msg, SOL_IPV6, IPV6_2292RTHDR, (rthdr->hdrlen+1) << 3, rthdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | } |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 712 | if (np->rxopt.bits.odstopts && opt->dst1) { |
Arnaldo Carvalho de Melo | d56f90a | 2007-04-10 20:50:43 -0700 | [diff] [blame] | 713 | u8 *ptr = nh + opt->dst1; |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 714 | put_cmsg(msg, SOL_IPV6, IPV6_2292DSTOPTS, (ptr[1]+1)<<3, ptr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | } |
Balazs Scheidler | 6c46862 | 2010-10-21 16:08:28 +0200 | [diff] [blame] | 716 | if (np->rxopt.bits.rxorigdstaddr) { |
| 717 | struct sockaddr_in6 sin6; |
Willem de Bruijn | 4a06fa6 | 2019-01-07 16:47:33 -0500 | [diff] [blame] | 718 | __be16 _ports[2], *ports; |
Balazs Scheidler | 6c46862 | 2010-10-21 16:08:28 +0200 | [diff] [blame] | 719 | |
Willem de Bruijn | 4a06fa6 | 2019-01-07 16:47:33 -0500 | [diff] [blame] | 720 | ports = skb_header_pointer(skb, skb_transport_offset(skb), |
| 721 | sizeof(_ports), &_ports); |
| 722 | if (ports) { |
Balazs Scheidler | 6c46862 | 2010-10-21 16:08:28 +0200 | [diff] [blame] | 723 | /* All current transport protocols have the port numbers in the |
| 724 | * first four bytes of the transport header and this function is |
| 725 | * written with this assumption in mind. |
| 726 | */ |
Balazs Scheidler | 6c46862 | 2010-10-21 16:08:28 +0200 | [diff] [blame] | 727 | sin6.sin6_family = AF_INET6; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 728 | sin6.sin6_addr = ipv6_hdr(skb)->daddr; |
Balazs Scheidler | 6c46862 | 2010-10-21 16:08:28 +0200 | [diff] [blame] | 729 | sin6.sin6_port = ports[1]; |
| 730 | sin6.sin6_flowinfo = 0; |
Hannes Frederic Sowa | 3868b7a | 2013-03-08 02:07:26 +0000 | [diff] [blame] | 731 | sin6.sin6_scope_id = |
| 732 | ipv6_iface_scope_id(&ipv6_hdr(skb)->daddr, |
| 733 | opt->iif); |
Balazs Scheidler | 6c46862 | 2010-10-21 16:08:28 +0200 | [diff] [blame] | 734 | |
| 735 | put_cmsg(msg, SOL_IPV6, IPV6_ORIGDSTADDR, sizeof(sin6), &sin6); |
| 736 | } |
| 737 | } |
Willem de Bruijn | 0cc0aa61 | 2016-11-02 11:02:17 -0400 | [diff] [blame] | 738 | if (np->rxopt.bits.recvfragsize && opt->frag_max_size) { |
| 739 | int val = opt->frag_max_size; |
| 740 | |
| 741 | put_cmsg(msg, SOL_IPV6, IPV6_RECVFRAGSIZE, sizeof(val), &val); |
| 742 | } |
Hannes Frederic Sowa | 4b261c75 | 2014-01-20 03:43:08 +0100 | [diff] [blame] | 743 | } |
| 744 | |
| 745 | void ip6_datagram_recv_ctl(struct sock *sk, struct msghdr *msg, |
| 746 | struct sk_buff *skb) |
| 747 | { |
| 748 | ip6_datagram_recv_common_ctl(sk, msg, skb); |
| 749 | ip6_datagram_recv_specific_ctl(sk, msg, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | } |
Tom Parkin | 8e72d37 | 2013-01-31 01:02:25 +0000 | [diff] [blame] | 751 | EXPORT_SYMBOL_GPL(ip6_datagram_recv_ctl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | |
Tom Parkin | 73df66f | 2013-01-31 01:02:24 +0000 | [diff] [blame] | 753 | int ip6_datagram_send_ctl(struct net *net, struct sock *sk, |
| 754 | struct msghdr *msg, struct flowi6 *fl6, |
Willem de Bruijn | 5fdaa88 | 2018-07-06 10:12:57 -0400 | [diff] [blame] | 755 | struct ipcm6_cookie *ipc6) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | { |
| 757 | struct in6_pktinfo *src_info; |
| 758 | struct cmsghdr *cmsg; |
| 759 | struct ipv6_rt_hdr *rthdr; |
| 760 | struct ipv6_opt_hdr *hdr; |
Wei Wang | 26879da | 2016-05-02 21:40:07 -0700 | [diff] [blame] | 761 | struct ipv6_txoptions *opt = ipc6->opt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 762 | int len; |
| 763 | int err = 0; |
| 764 | |
Gu Zheng | f95b414 | 2014-12-11 11:22:04 +0800 | [diff] [blame] | 765 | for_each_cmsghdr(cmsg, msg) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | int addr_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 767 | |
| 768 | if (!CMSG_OK(msg, cmsg)) { |
| 769 | err = -EINVAL; |
| 770 | goto exit_f; |
| 771 | } |
| 772 | |
Soheil Hassas Yeganeh | ad1e46a | 2016-04-02 23:08:11 -0400 | [diff] [blame] | 773 | if (cmsg->cmsg_level == SOL_SOCKET) { |
Willem de Bruijn | 5fdaa88 | 2018-07-06 10:12:57 -0400 | [diff] [blame] | 774 | err = __sock_cmsg_send(sk, msg, cmsg, &ipc6->sockc); |
Eric Dumazet | 2632616 | 2016-05-13 06:14:37 -0700 | [diff] [blame] | 775 | if (err) |
| 776 | return err; |
Soheil Hassas Yeganeh | ad1e46a | 2016-04-02 23:08:11 -0400 | [diff] [blame] | 777 | continue; |
| 778 | } |
| 779 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | if (cmsg->cmsg_level != SOL_IPV6) |
| 781 | continue; |
| 782 | |
| 783 | switch (cmsg->cmsg_type) { |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 784 | case IPV6_PKTINFO: |
| 785 | case IPV6_2292PKTINFO: |
YOSHIFUJI Hideaki | 187e383 | 2008-06-04 13:01:37 +0900 | [diff] [blame] | 786 | { |
| 787 | struct net_device *dev = NULL; |
Mike Manning | 6da5b0f | 2018-11-07 15:36:04 +0000 | [diff] [blame] | 788 | int src_idx; |
YOSHIFUJI Hideaki | 187e383 | 2008-06-04 13:01:37 +0900 | [diff] [blame] | 789 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 790 | if (cmsg->cmsg_len < CMSG_LEN(sizeof(struct in6_pktinfo))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | err = -EINVAL; |
| 792 | goto exit_f; |
| 793 | } |
| 794 | |
| 795 | src_info = (struct in6_pktinfo *)CMSG_DATA(cmsg); |
Mike Manning | 6da5b0f | 2018-11-07 15:36:04 +0000 | [diff] [blame] | 796 | src_idx = src_info->ipi6_ifindex; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 797 | |
Mike Manning | 6da5b0f | 2018-11-07 15:36:04 +0000 | [diff] [blame] | 798 | if (src_idx) { |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 799 | if (fl6->flowi6_oif && |
Mike Manning | 6da5b0f | 2018-11-07 15:36:04 +0000 | [diff] [blame] | 800 | src_idx != fl6->flowi6_oif && |
| 801 | (sk->sk_bound_dev_if != fl6->flowi6_oif || |
| 802 | !sk_dev_equal_l3scope(sk, src_idx))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 803 | return -EINVAL; |
Mike Manning | 6da5b0f | 2018-11-07 15:36:04 +0000 | [diff] [blame] | 804 | fl6->flowi6_oif = src_idx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | } |
| 806 | |
YOSHIFUJI Hideaki | 187e383 | 2008-06-04 13:01:37 +0900 | [diff] [blame] | 807 | addr_type = __ipv6_addr_type(&src_info->ipi6_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | |
Eric Dumazet | 536b2e9 | 2009-11-02 12:21:06 +0100 | [diff] [blame] | 809 | rcu_read_lock(); |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 810 | if (fl6->flowi6_oif) { |
| 811 | dev = dev_get_by_index_rcu(net, fl6->flowi6_oif); |
Eric Dumazet | 536b2e9 | 2009-11-02 12:21:06 +0100 | [diff] [blame] | 812 | if (!dev) { |
| 813 | rcu_read_unlock(); |
YOSHIFUJI Hideaki | 187e383 | 2008-06-04 13:01:37 +0900 | [diff] [blame] | 814 | return -ENODEV; |
Eric Dumazet | 536b2e9 | 2009-11-02 12:21:06 +0100 | [diff] [blame] | 815 | } |
| 816 | } else if (addr_type & IPV6_ADDR_LINKLOCAL) { |
| 817 | rcu_read_unlock(); |
YOSHIFUJI Hideaki | 187e383 | 2008-06-04 13:01:37 +0900 | [diff] [blame] | 818 | return -EINVAL; |
Eric Dumazet | 536b2e9 | 2009-11-02 12:21:06 +0100 | [diff] [blame] | 819 | } |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 820 | |
YOSHIFUJI Hideaki | 187e383 | 2008-06-04 13:01:37 +0900 | [diff] [blame] | 821 | if (addr_type != IPV6_ADDR_ANY) { |
| 822 | int strict = __ipv6_addr_src_scope(addr_type) <= IPV6_ADDR_SCOPE_LINKLOCAL; |
Vincent Bernat | 83ba464 | 2018-07-31 21:18:11 +0200 | [diff] [blame] | 823 | if (!ipv6_can_nonlocal_bind(net, inet_sk(sk)) && |
David Ahern | 232378e | 2018-03-13 08:29:37 -0700 | [diff] [blame] | 824 | !ipv6_chk_addr_and_flags(net, &src_info->ipi6_addr, |
| 825 | dev, !strict, 0, |
| 826 | IFA_F_TENTATIVE) && |
FX Le Bail | 7c90cc2 | 2014-01-22 07:42:37 +0100 | [diff] [blame] | 827 | !ipv6_chk_acast_addr_src(net, dev, |
| 828 | &src_info->ipi6_addr)) |
YOSHIFUJI Hideaki | 187e383 | 2008-06-04 13:01:37 +0900 | [diff] [blame] | 829 | err = -EINVAL; |
| 830 | else |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 831 | fl6->saddr = src_info->ipi6_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 832 | } |
YOSHIFUJI Hideaki | 187e383 | 2008-06-04 13:01:37 +0900 | [diff] [blame] | 833 | |
Eric Dumazet | 536b2e9 | 2009-11-02 12:21:06 +0100 | [diff] [blame] | 834 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 835 | |
YOSHIFUJI Hideaki | 187e383 | 2008-06-04 13:01:37 +0900 | [diff] [blame] | 836 | if (err) |
| 837 | goto exit_f; |
| 838 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 839 | break; |
YOSHIFUJI Hideaki | 187e383 | 2008-06-04 13:01:37 +0900 | [diff] [blame] | 840 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 841 | |
| 842 | case IPV6_FLOWINFO: |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 843 | if (cmsg->cmsg_len < CMSG_LEN(4)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 844 | err = -EINVAL; |
| 845 | goto exit_f; |
| 846 | } |
| 847 | |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 848 | if (fl6->flowlabel&IPV6_FLOWINFO_MASK) { |
| 849 | if ((fl6->flowlabel^*(__be32 *)CMSG_DATA(cmsg))&~IPV6_FLOWINFO_MASK) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 850 | err = -EINVAL; |
| 851 | goto exit_f; |
| 852 | } |
| 853 | } |
David S. Miller | 4c9483b | 2011-03-12 16:22:43 -0500 | [diff] [blame] | 854 | fl6->flowlabel = IPV6_FLOWINFO_MASK & *(__be32 *)CMSG_DATA(cmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | break; |
| 856 | |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 857 | case IPV6_2292HOPOPTS: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | case IPV6_HOPOPTS: |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 859 | 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] | 860 | err = -EINVAL; |
| 861 | goto exit_f; |
| 862 | } |
| 863 | |
| 864 | hdr = (struct ipv6_opt_hdr *)CMSG_DATA(cmsg); |
| 865 | len = ((hdr->hdrlen + 1) << 3); |
| 866 | if (cmsg->cmsg_len < CMSG_LEN(len)) { |
| 867 | err = -EINVAL; |
| 868 | goto exit_f; |
| 869 | } |
Eric W. Biederman | af31f41 | 2012-11-16 03:03:06 +0000 | [diff] [blame] | 870 | if (!ns_capable(net->user_ns, CAP_NET_RAW)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 871 | err = -EPERM; |
| 872 | goto exit_f; |
| 873 | } |
| 874 | opt->opt_nflen += len; |
| 875 | opt->hopopt = hdr; |
| 876 | break; |
| 877 | |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 878 | case IPV6_2292DSTOPTS: |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 879 | if (cmsg->cmsg_len < CMSG_LEN(sizeof(struct ipv6_opt_hdr))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 880 | err = -EINVAL; |
| 881 | goto exit_f; |
| 882 | } |
| 883 | |
| 884 | hdr = (struct ipv6_opt_hdr *)CMSG_DATA(cmsg); |
| 885 | len = ((hdr->hdrlen + 1) << 3); |
| 886 | if (cmsg->cmsg_len < CMSG_LEN(len)) { |
| 887 | err = -EINVAL; |
| 888 | goto exit_f; |
| 889 | } |
Eric W. Biederman | af31f41 | 2012-11-16 03:03:06 +0000 | [diff] [blame] | 890 | if (!ns_capable(net->user_ns, CAP_NET_RAW)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | err = -EPERM; |
| 892 | goto exit_f; |
| 893 | } |
| 894 | if (opt->dst1opt) { |
| 895 | err = -EINVAL; |
| 896 | goto exit_f; |
| 897 | } |
| 898 | opt->opt_flen += len; |
| 899 | opt->dst1opt = hdr; |
| 900 | break; |
| 901 | |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 902 | case IPV6_DSTOPTS: |
| 903 | case IPV6_RTHDRDSTOPTS: |
| 904 | if (cmsg->cmsg_len < CMSG_LEN(sizeof(struct ipv6_opt_hdr))) { |
| 905 | err = -EINVAL; |
| 906 | goto exit_f; |
| 907 | } |
| 908 | |
| 909 | hdr = (struct ipv6_opt_hdr *)CMSG_DATA(cmsg); |
| 910 | len = ((hdr->hdrlen + 1) << 3); |
| 911 | if (cmsg->cmsg_len < CMSG_LEN(len)) { |
| 912 | err = -EINVAL; |
| 913 | goto exit_f; |
| 914 | } |
Eric W. Biederman | af31f41 | 2012-11-16 03:03:06 +0000 | [diff] [blame] | 915 | if (!ns_capable(net->user_ns, CAP_NET_RAW)) { |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 916 | err = -EPERM; |
| 917 | goto exit_f; |
| 918 | } |
| 919 | if (cmsg->cmsg_type == IPV6_DSTOPTS) { |
| 920 | opt->opt_flen += len; |
| 921 | opt->dst1opt = hdr; |
| 922 | } else { |
| 923 | opt->opt_nflen += len; |
| 924 | opt->dst0opt = hdr; |
| 925 | } |
| 926 | break; |
| 927 | |
| 928 | case IPV6_2292RTHDR: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | case IPV6_RTHDR: |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 930 | if (cmsg->cmsg_len < CMSG_LEN(sizeof(struct ipv6_rt_hdr))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | err = -EINVAL; |
| 932 | goto exit_f; |
| 933 | } |
| 934 | |
| 935 | rthdr = (struct ipv6_rt_hdr *)CMSG_DATA(cmsg); |
| 936 | |
Masahide NAKAMURA | 280a9d3 | 2006-08-23 19:17:12 -0700 | [diff] [blame] | 937 | switch (rthdr->type) { |
Amerigo Wang | 07a9362 | 2012-10-29 16:23:10 +0000 | [diff] [blame] | 938 | #if IS_ENABLED(CONFIG_IPV6_MIP6) |
Masahide NAKAMURA | 280a9d3 | 2006-08-23 19:17:12 -0700 | [diff] [blame] | 939 | case IPV6_SRCRT_TYPE_2: |
Brian Haley | 6e093d9 | 2008-11-12 22:59:21 -0800 | [diff] [blame] | 940 | if (rthdr->hdrlen != 2 || |
| 941 | rthdr->segments_left != 1) { |
| 942 | err = -EINVAL; |
| 943 | goto exit_f; |
| 944 | } |
Masahide NAKAMURA | 280a9d3 | 2006-08-23 19:17:12 -0700 | [diff] [blame] | 945 | break; |
YOSHIFUJI Hideaki | bb4dbf9 | 2007-07-10 22:55:49 -0700 | [diff] [blame] | 946 | #endif |
Masahide NAKAMURA | 280a9d3 | 2006-08-23 19:17:12 -0700 | [diff] [blame] | 947 | default: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 948 | err = -EINVAL; |
| 949 | goto exit_f; |
| 950 | } |
| 951 | |
| 952 | len = ((rthdr->hdrlen + 1) << 3); |
| 953 | |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 954 | if (cmsg->cmsg_len < CMSG_LEN(len)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 955 | err = -EINVAL; |
| 956 | goto exit_f; |
| 957 | } |
| 958 | |
| 959 | /* segments left must also match */ |
| 960 | if ((rthdr->hdrlen >> 1) != rthdr->segments_left) { |
| 961 | err = -EINVAL; |
| 962 | goto exit_f; |
| 963 | } |
| 964 | |
| 965 | opt->opt_nflen += len; |
| 966 | opt->srcrt = rthdr; |
| 967 | |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 968 | if (cmsg->cmsg_type == IPV6_2292RTHDR && opt->dst1opt) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 969 | int dsthdrlen = ((opt->dst1opt->hdrlen+1)<<3); |
| 970 | |
| 971 | opt->opt_nflen += dsthdrlen; |
| 972 | opt->dst0opt = opt->dst1opt; |
| 973 | opt->dst1opt = NULL; |
| 974 | opt->opt_flen -= dsthdrlen; |
| 975 | } |
| 976 | |
| 977 | break; |
| 978 | |
YOSHIFUJI Hideaki | 333fad5 | 2005-09-08 09:59:17 +0900 | [diff] [blame] | 979 | case IPV6_2292HOPLIMIT: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | case IPV6_HOPLIMIT: |
| 981 | if (cmsg->cmsg_len != CMSG_LEN(sizeof(int))) { |
| 982 | err = -EINVAL; |
| 983 | goto exit_f; |
| 984 | } |
| 985 | |
Wei Wang | 26879da | 2016-05-02 21:40:07 -0700 | [diff] [blame] | 986 | ipc6->hlimit = *(int *)CMSG_DATA(cmsg); |
| 987 | if (ipc6->hlimit < -1 || ipc6->hlimit > 0xff) { |
Shan Wei | e8766fc | 2008-06-10 15:50:55 +0800 | [diff] [blame] | 988 | err = -EINVAL; |
| 989 | goto exit_f; |
| 990 | } |
| 991 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | break; |
| 993 | |
YOSHIFUJI Hideaki | 41a1f8e | 2005-09-08 10:19:03 +0900 | [diff] [blame] | 994 | case IPV6_TCLASS: |
| 995 | { |
| 996 | int tc; |
| 997 | |
| 998 | err = -EINVAL; |
Eldad Zack | b5a4257 | 2012-04-01 07:49:03 +0000 | [diff] [blame] | 999 | if (cmsg->cmsg_len != CMSG_LEN(sizeof(int))) |
YOSHIFUJI Hideaki | 41a1f8e | 2005-09-08 10:19:03 +0900 | [diff] [blame] | 1000 | goto exit_f; |
YOSHIFUJI Hideaki | 41a1f8e | 2005-09-08 10:19:03 +0900 | [diff] [blame] | 1001 | |
| 1002 | tc = *(int *)CMSG_DATA(cmsg); |
Remi Denis-Courmont | d0ee011 | 2006-09-13 20:08:07 -0700 | [diff] [blame] | 1003 | if (tc < -1 || tc > 0xff) |
YOSHIFUJI Hideaki | 41a1f8e | 2005-09-08 10:19:03 +0900 | [diff] [blame] | 1004 | goto exit_f; |
| 1005 | |
| 1006 | err = 0; |
Wei Wang | 26879da | 2016-05-02 21:40:07 -0700 | [diff] [blame] | 1007 | ipc6->tclass = tc; |
YOSHIFUJI Hideaki | 41a1f8e | 2005-09-08 10:19:03 +0900 | [diff] [blame] | 1008 | |
| 1009 | break; |
| 1010 | } |
Brian Haley | 13b52cd | 2010-04-23 11:26:08 +0000 | [diff] [blame] | 1011 | |
| 1012 | case IPV6_DONTFRAG: |
| 1013 | { |
| 1014 | int df; |
| 1015 | |
| 1016 | err = -EINVAL; |
Eldad Zack | b5a4257 | 2012-04-01 07:49:03 +0000 | [diff] [blame] | 1017 | if (cmsg->cmsg_len != CMSG_LEN(sizeof(int))) |
Brian Haley | 13b52cd | 2010-04-23 11:26:08 +0000 | [diff] [blame] | 1018 | goto exit_f; |
Brian Haley | 13b52cd | 2010-04-23 11:26:08 +0000 | [diff] [blame] | 1019 | |
| 1020 | df = *(int *)CMSG_DATA(cmsg); |
| 1021 | if (df < 0 || df > 1) |
| 1022 | goto exit_f; |
| 1023 | |
| 1024 | err = 0; |
Wei Wang | 26879da | 2016-05-02 21:40:07 -0700 | [diff] [blame] | 1025 | ipc6->dontfrag = df; |
Brian Haley | 13b52cd | 2010-04-23 11:26:08 +0000 | [diff] [blame] | 1026 | |
| 1027 | break; |
| 1028 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1029 | default: |
Joe Perches | ba7a46f | 2014-11-11 10:59:17 -0800 | [diff] [blame] | 1030 | net_dbg_ratelimited("invalid cmsg type: %d\n", |
| 1031 | cmsg->cmsg_type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | err = -EINVAL; |
Miao Xie | 4a36702 | 2008-07-29 23:57:58 -0700 | [diff] [blame] | 1033 | goto exit_f; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 1034 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1035 | } |
| 1036 | |
| 1037 | exit_f: |
| 1038 | return err; |
| 1039 | } |
Tom Parkin | 73df66f | 2013-01-31 01:02:24 +0000 | [diff] [blame] | 1040 | EXPORT_SYMBOL_GPL(ip6_datagram_send_ctl); |
Lorenzo Colitti | 17ef66af | 2013-05-31 15:05:48 +0000 | [diff] [blame] | 1041 | |
Paolo Abeni | 6c206b2 | 2018-06-08 11:35:40 +0200 | [diff] [blame] | 1042 | void __ip6_dgram_sock_seq_show(struct seq_file *seq, struct sock *sp, |
| 1043 | __u16 srcp, __u16 destp, int rqueue, int bucket) |
Lorenzo Colitti | 17ef66af | 2013-05-31 15:05:48 +0000 | [diff] [blame] | 1044 | { |
Lorenzo Colitti | 17ef66af | 2013-05-31 15:05:48 +0000 | [diff] [blame] | 1045 | const struct in6_addr *dest, *src; |
| 1046 | |
Eric Dumazet | efe4208 | 2013-10-03 15:42:29 -0700 | [diff] [blame] | 1047 | dest = &sp->sk_v6_daddr; |
| 1048 | src = &sp->sk_v6_rcv_saddr; |
Lorenzo Colitti | 17ef66af | 2013-05-31 15:05:48 +0000 | [diff] [blame] | 1049 | seq_printf(seq, |
| 1050 | "%5d: %08X%08X%08X%08X:%04X %08X%08X%08X%08X:%04X " |
Patrick Talbert | ea9a037 | 2019-05-17 17:11:28 +0200 | [diff] [blame] | 1051 | "%02X %08X:%08X %02X:%08lX %08X %5u %8d %lu %d %pK %u\n", |
Lorenzo Colitti | 17ef66af | 2013-05-31 15:05:48 +0000 | [diff] [blame] | 1052 | bucket, |
| 1053 | src->s6_addr32[0], src->s6_addr32[1], |
| 1054 | src->s6_addr32[2], src->s6_addr32[3], srcp, |
| 1055 | dest->s6_addr32[0], dest->s6_addr32[1], |
| 1056 | dest->s6_addr32[2], dest->s6_addr32[3], destp, |
| 1057 | sp->sk_state, |
| 1058 | sk_wmem_alloc_get(sp), |
Paolo Abeni | 6c206b2 | 2018-06-08 11:35:40 +0200 | [diff] [blame] | 1059 | rqueue, |
Lorenzo Colitti | 17ef66af | 2013-05-31 15:05:48 +0000 | [diff] [blame] | 1060 | 0, 0L, 0, |
| 1061 | from_kuid_munged(seq_user_ns(seq), sock_i_uid(sp)), |
| 1062 | 0, |
| 1063 | sock_i_ino(sp), |
Reshetova, Elena | 41c6d65 | 2017-06-30 13:08:01 +0300 | [diff] [blame] | 1064 | refcount_read(&sp->sk_refcnt), sp, |
Lorenzo Colitti | 17ef66af | 2013-05-31 15:05:48 +0000 | [diff] [blame] | 1065 | atomic_read(&sp->sk_drops)); |
| 1066 | } |