Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * INET An implementation of the TCP/IP protocol suite for the LINUX |
| 3 | * operating system. INET is implemented using the BSD Socket |
| 4 | * interface as the means of communication with the user level. |
| 5 | * |
| 6 | * PF_INET protocol family socket handler. |
| 7 | * |
Jesper Juhl | 02c30a8 | 2005-05-05 16:16:16 -0700 | [diff] [blame] | 8 | * Authors: Ross Biro |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
| 10 | * Florian La Roche, <flla@stud.uni-sb.de> |
| 11 | * Alan Cox, <A.Cox@swansea.ac.uk> |
| 12 | * |
| 13 | * Changes (see also sock.c) |
| 14 | * |
| 15 | * piggy, |
| 16 | * Karl Knutson : Socket protocol table |
| 17 | * A.N.Kuznetsov : Socket death error in accept(). |
| 18 | * John Richardson : Fix non blocking error in connect() |
| 19 | * so sockets that fail to connect |
| 20 | * don't return -EINPROGRESS. |
| 21 | * Alan Cox : Asynchronous I/O support |
| 22 | * Alan Cox : Keep correct socket pointer on sock |
| 23 | * structures |
| 24 | * when accept() ed |
| 25 | * Alan Cox : Semantics of SO_LINGER aren't state |
| 26 | * moved to close when you look carefully. |
| 27 | * With this fixed and the accept bug fixed |
| 28 | * some RPC stuff seems happier. |
| 29 | * Niibe Yutaka : 4.4BSD style write async I/O |
| 30 | * Alan Cox, |
| 31 | * Tony Gale : Fixed reuse semantics. |
| 32 | * Alan Cox : bind() shouldn't abort existing but dead |
| 33 | * sockets. Stops FTP netin:.. I hope. |
| 34 | * Alan Cox : bind() works correctly for RAW sockets. |
| 35 | * Note that FreeBSD at least was broken |
| 36 | * in this respect so be careful with |
| 37 | * compatibility tests... |
| 38 | * Alan Cox : routing cache support |
| 39 | * Alan Cox : memzero the socket structure for |
| 40 | * compactness. |
| 41 | * Matt Day : nonblock connect error handler |
| 42 | * Alan Cox : Allow large numbers of pending sockets |
| 43 | * (eg for big web sites), but only if |
| 44 | * specifically application requested. |
| 45 | * Alan Cox : New buffering throughout IP. Used |
| 46 | * dumbly. |
| 47 | * Alan Cox : New buffering now used smartly. |
| 48 | * Alan Cox : BSD rather than common sense |
| 49 | * interpretation of listen. |
| 50 | * Germano Caronni : Assorted small races. |
| 51 | * Alan Cox : sendmsg/recvmsg basic support. |
| 52 | * Alan Cox : Only sendmsg/recvmsg now supported. |
| 53 | * Alan Cox : Locked down bind (see security list). |
| 54 | * Alan Cox : Loosened bind a little. |
| 55 | * Mike McLagan : ADD/DEL DLCI Ioctls |
| 56 | * Willy Konynenberg : Transparent proxying support. |
| 57 | * David S. Miller : New socket lookup architecture. |
| 58 | * Some other random speedups. |
| 59 | * Cyrus Durgin : Cleaned up file for kmod hacks. |
| 60 | * Andi Kleen : Fix inet_stream_connect TCP race. |
| 61 | * |
| 62 | * This program is free software; you can redistribute it and/or |
| 63 | * modify it under the terms of the GNU General Public License |
| 64 | * as published by the Free Software Foundation; either version |
| 65 | * 2 of the License, or (at your option) any later version. |
| 66 | */ |
| 67 | |
Joe Perches | afd46503 | 2012-03-12 07:03:32 +0000 | [diff] [blame] | 68 | #define pr_fmt(fmt) "IPv4: " fmt |
| 69 | |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 70 | #include <linux/err.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | #include <linux/errno.h> |
| 72 | #include <linux/types.h> |
| 73 | #include <linux/socket.h> |
| 74 | #include <linux/in.h> |
| 75 | #include <linux/kernel.h> |
Paul Gortmaker | d3fc035 | 2016-07-11 16:37:51 -0400 | [diff] [blame] | 76 | #include <linux/kmod.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | #include <linux/sched.h> |
| 78 | #include <linux/timer.h> |
| 79 | #include <linux/string.h> |
| 80 | #include <linux/sockios.h> |
| 81 | #include <linux/net.h> |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 82 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | #include <linux/fcntl.h> |
| 84 | #include <linux/mm.h> |
| 85 | #include <linux/interrupt.h> |
| 86 | #include <linux/stat.h> |
| 87 | #include <linux/init.h> |
| 88 | #include <linux/poll.h> |
| 89 | #include <linux/netfilter_ipv4.h> |
David S. Miller | b3da2cf | 2007-03-23 11:40:27 -0700 | [diff] [blame] | 90 | #include <linux/random.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 91 | #include <linux/slab.h> |
Chenbo Feng | aa284cd | 2017-04-19 14:22:47 -0700 | [diff] [blame] | 92 | #include <linux/netfilter/xt_qtaguid.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | |
Linus Torvalds | 7c0f6ba | 2016-12-24 11:46:01 -0800 | [diff] [blame] | 94 | #include <linux/uaccess.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | #include <linux/inet.h> |
| 97 | #include <linux/igmp.h> |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 98 | #include <linux/inetdevice.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | #include <linux/netdevice.h> |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 100 | #include <net/checksum.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | #include <net/ip.h> |
| 102 | #include <net/protocol.h> |
| 103 | #include <net/arp.h> |
| 104 | #include <net/route.h> |
| 105 | #include <net/ip_fib.h> |
Arnaldo Carvalho de Melo | 295f732 | 2005-08-09 20:11:56 -0700 | [diff] [blame] | 106 | #include <net/inet_connection_sock.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | #include <net/tcp.h> |
| 108 | #include <net/udp.h> |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 109 | #include <net/udplite.h> |
Vasiliy Kulikov | c319b4d | 2011-05-13 10:01:00 +0000 | [diff] [blame] | 110 | #include <net/ping.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | #include <linux/skbuff.h> |
| 112 | #include <net/sock.h> |
| 113 | #include <net/raw.h> |
| 114 | #include <net/icmp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | #include <net/inet_common.h> |
Thomas Graf | 045a0fa | 2015-07-23 10:08:44 +0200 | [diff] [blame] | 116 | #include <net/ip_tunnels.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | #include <net/xfrm.h> |
Pavel Emelyanov | 9b4661b | 2008-07-18 04:01:44 -0700 | [diff] [blame] | 118 | #include <net/net_namespace.h> |
Eric Dumazet | aebda15 | 2013-04-29 05:58:52 +0000 | [diff] [blame] | 119 | #include <net/secure_seq.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | #ifdef CONFIG_IP_MROUTE |
| 121 | #include <linux/mroute.h> |
| 122 | #endif |
David Ahern | 3236b00 | 2015-09-29 20:07:14 -0700 | [diff] [blame] | 123 | #include <net/l3mdev.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | |
Robert Love | 7bafcbf | 2008-10-15 15:35:44 -0400 | [diff] [blame] | 125 | #ifdef CONFIG_ANDROID_PARANOID_NETWORK |
| 126 | #include <linux/android_aid.h> |
Chia-chi Yeh | d846068 | 2009-06-30 11:23:04 +0800 | [diff] [blame] | 127 | |
| 128 | static inline int current_has_network(void) |
| 129 | { |
| 130 | return in_egroup_p(AID_INET) || capable(CAP_NET_RAW); |
| 131 | } |
| 132 | #else |
| 133 | static inline int current_has_network(void) |
| 134 | { |
| 135 | return 1; |
| 136 | } |
Robert Love | 7bafcbf | 2008-10-15 15:35:44 -0400 | [diff] [blame] | 137 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | |
| 139 | /* The inetsw table contains everything that inet_create needs to |
| 140 | * build a new socket. |
| 141 | */ |
| 142 | static struct list_head inetsw[SOCK_MAX]; |
| 143 | static DEFINE_SPINLOCK(inetsw_lock); |
| 144 | |
| 145 | /* New destruction routine */ |
| 146 | |
| 147 | void inet_sock_destruct(struct sock *sk) |
| 148 | { |
| 149 | struct inet_sock *inet = inet_sk(sk); |
| 150 | |
| 151 | __skb_queue_purge(&sk->sk_receive_queue); |
| 152 | __skb_queue_purge(&sk->sk_error_queue); |
| 153 | |
Hideo Aoki | 95766ff | 2007-12-31 00:29:24 -0800 | [diff] [blame] | 154 | sk_mem_reclaim(sk); |
| 155 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | if (sk->sk_type == SOCK_STREAM && sk->sk_state != TCP_CLOSE) { |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 157 | pr_err("Attempt to release TCP socket in state %d %p\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | sk->sk_state, sk); |
| 159 | return; |
| 160 | } |
| 161 | if (!sock_flag(sk, SOCK_DEAD)) { |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 162 | pr_err("Attempt to release alive inet socket %p\n", sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | return; |
| 164 | } |
| 165 | |
Ilpo Järvinen | 547b792 | 2008-07-25 21:43:18 -0700 | [diff] [blame] | 166 | WARN_ON(atomic_read(&sk->sk_rmem_alloc)); |
Reshetova, Elena | 14afee4 | 2017-06-30 13:08:00 +0300 | [diff] [blame] | 167 | WARN_ON(refcount_read(&sk->sk_wmem_alloc)); |
Ilpo Järvinen | 547b792 | 2008-07-25 21:43:18 -0700 | [diff] [blame] | 168 | WARN_ON(sk->sk_wmem_queued); |
| 169 | WARN_ON(sk->sk_forward_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | |
Eric Dumazet | f6d8bd0 | 2011-04-21 09:45:37 +0000 | [diff] [blame] | 171 | kfree(rcu_dereference_protected(inet->inet_opt, 1)); |
Eric Dumazet | b6c6712 | 2010-04-08 23:03:29 +0000 | [diff] [blame] | 172 | dst_release(rcu_dereference_check(sk->sk_dst_cache, 1)); |
David S. Miller | 41063e9 | 2012-06-19 21:22:05 -0700 | [diff] [blame] | 173 | dst_release(sk->sk_rx_dst); |
Arnaldo Carvalho de Melo | e684897 | 2005-08-09 19:45:38 -0700 | [diff] [blame] | 174 | sk_refcnt_debug_dec(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 176 | EXPORT_SYMBOL(inet_sock_destruct); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | |
| 178 | /* |
| 179 | * The routines beyond this point handle the behaviour of an AF_INET |
| 180 | * socket object. Mostly it punts to the subprotocols of IP to do |
| 181 | * the work. |
| 182 | */ |
| 183 | |
| 184 | /* |
| 185 | * Automatically bind an unbound socket. |
| 186 | */ |
| 187 | |
| 188 | static int inet_autobind(struct sock *sk) |
| 189 | { |
| 190 | struct inet_sock *inet; |
| 191 | /* We may need to bind the socket. */ |
| 192 | lock_sock(sk); |
| 193 | inet = inet_sk(sk); |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 194 | if (!inet->inet_num) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | if (sk->sk_prot->get_port(sk, 0)) { |
| 196 | release_sock(sk); |
| 197 | return -EAGAIN; |
| 198 | } |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 199 | inet->inet_sport = htons(inet->inet_num); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | } |
| 201 | release_sock(sk); |
| 202 | return 0; |
| 203 | } |
| 204 | |
| 205 | /* |
| 206 | * Move a socket into listening state. |
| 207 | */ |
| 208 | int inet_listen(struct socket *sock, int backlog) |
| 209 | { |
| 210 | struct sock *sk = sock->sk; |
| 211 | unsigned char old_state; |
| 212 | int err; |
| 213 | |
| 214 | lock_sock(sk); |
| 215 | |
| 216 | err = -EINVAL; |
| 217 | if (sock->state != SS_UNCONNECTED || sock->type != SOCK_STREAM) |
| 218 | goto out; |
| 219 | |
| 220 | old_state = sk->sk_state; |
| 221 | if (!((1 << old_state) & (TCPF_CLOSE | TCPF_LISTEN))) |
| 222 | goto out; |
| 223 | |
| 224 | /* Really, if the socket is already in listen state |
| 225 | * we can only allow the backlog to be adjusted. |
| 226 | */ |
| 227 | if (old_state != TCP_LISTEN) { |
Yuchung Cheng | cebc5cb | 2016-08-22 17:17:54 -0700 | [diff] [blame] | 228 | /* Enable TFO w/o requiring TCP_FASTOPEN socket option. |
Jerry Chu | 8336886 | 2012-08-31 12:29:12 +0000 | [diff] [blame] | 229 | * Note that only TCP sockets (SOCK_STREAM) will reach here. |
Yuchung Cheng | cebc5cb | 2016-08-22 17:17:54 -0700 | [diff] [blame] | 230 | * Also fastopen backlog may already been set via the option |
| 231 | * because the socket was in TCP_LISTEN state previously but |
| 232 | * was shutdown() rather than close(). |
Jerry Chu | 8336886 | 2012-08-31 12:29:12 +0000 | [diff] [blame] | 233 | */ |
Yuchung Cheng | cebc5cb | 2016-08-22 17:17:54 -0700 | [diff] [blame] | 234 | if ((sysctl_tcp_fastopen & TFO_SERVER_WO_SOCKOPT1) && |
| 235 | (sysctl_tcp_fastopen & TFO_SERVER_ENABLE) && |
Eric Dumazet | 0536fcc | 2015-09-29 07:42:52 -0700 | [diff] [blame] | 236 | !inet_csk(sk)->icsk_accept_queue.fastopenq.max_qlen) { |
Yuchung Cheng | cebc5cb | 2016-08-22 17:17:54 -0700 | [diff] [blame] | 237 | fastopen_queue_tune(sk, backlog); |
Christoph Paasch | dfea2aa | 2015-06-18 09:15:34 -0700 | [diff] [blame] | 238 | tcp_fastopen_init_key_once(true); |
Jerry Chu | 8336886 | 2012-08-31 12:29:12 +0000 | [diff] [blame] | 239 | } |
Yuchung Cheng | cebc5cb | 2016-08-22 17:17:54 -0700 | [diff] [blame] | 240 | |
Eric Dumazet | 72a3eff | 2006-11-16 02:30:37 -0800 | [diff] [blame] | 241 | err = inet_csk_listen_start(sk, backlog); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | if (err) |
| 243 | goto out; |
| 244 | } |
| 245 | sk->sk_max_ack_backlog = backlog; |
| 246 | err = 0; |
| 247 | |
| 248 | out: |
| 249 | release_sock(sk); |
| 250 | return err; |
| 251 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 252 | EXPORT_SYMBOL(inet_listen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | |
| 254 | /* |
| 255 | * Create an inet socket. |
| 256 | */ |
| 257 | |
Eric Paris | 3f378b6 | 2009-11-05 22:18:14 -0800 | [diff] [blame] | 258 | static int inet_create(struct net *net, struct socket *sock, int protocol, |
| 259 | int kern) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | { |
| 261 | struct sock *sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | struct inet_protosw *answer; |
| 263 | struct inet_sock *inet; |
| 264 | struct proto *answer_prot; |
| 265 | unsigned char answer_flags; |
Arnaldo Carvalho de Melo | bb97d31 | 2005-08-09 20:19:14 -0700 | [diff] [blame] | 266 | int try_loading_module = 0; |
Herbert Xu | 86c8f9d | 2005-12-02 20:43:26 -0800 | [diff] [blame] | 267 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | |
Hannes Frederic Sowa | 79462ad0 | 2015-12-14 22:03:39 +0100 | [diff] [blame] | 269 | if (protocol < 0 || protocol >= IPPROTO_MAX) |
| 270 | return -EINVAL; |
| 271 | |
Robert Love | 7bafcbf | 2008-10-15 15:35:44 -0400 | [diff] [blame] | 272 | if (!current_has_network()) |
| 273 | return -EACCES; |
| 274 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | sock->state = SS_UNCONNECTED; |
| 276 | |
| 277 | /* Look for the requested type/protocol pair. */ |
Arnaldo Carvalho de Melo | bb97d31 | 2005-08-09 20:19:14 -0700 | [diff] [blame] | 278 | lookup_protocol: |
Herbert Xu | 86c8f9d | 2005-12-02 20:43:26 -0800 | [diff] [blame] | 279 | err = -ESOCKTNOSUPPORT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | rcu_read_lock(); |
Paul E. McKenney | 696adfe | 2008-07-25 01:45:34 -0700 | [diff] [blame] | 281 | list_for_each_entry_rcu(answer, &inetsw[sock->type], list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | |
Paul E. McKenney | 696adfe | 2008-07-25 01:45:34 -0700 | [diff] [blame] | 283 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | /* Check the non-wild match. */ |
| 285 | if (protocol == answer->protocol) { |
| 286 | if (protocol != IPPROTO_IP) |
| 287 | break; |
| 288 | } else { |
| 289 | /* Check for the two wild cases. */ |
| 290 | if (IPPROTO_IP == protocol) { |
| 291 | protocol = answer->protocol; |
| 292 | break; |
| 293 | } |
| 294 | if (IPPROTO_IP == answer->protocol) |
| 295 | break; |
| 296 | } |
Herbert Xu | 86c8f9d | 2005-12-02 20:43:26 -0800 | [diff] [blame] | 297 | err = -EPROTONOSUPPORT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | } |
| 299 | |
Paul E. McKenney | 696adfe | 2008-07-25 01:45:34 -0700 | [diff] [blame] | 300 | if (unlikely(err)) { |
Arnaldo Carvalho de Melo | bb97d31 | 2005-08-09 20:19:14 -0700 | [diff] [blame] | 301 | if (try_loading_module < 2) { |
| 302 | rcu_read_unlock(); |
| 303 | /* |
| 304 | * Be more specific, e.g. net-pf-2-proto-132-type-1 |
| 305 | * (net-pf-PF_INET-proto-IPPROTO_SCTP-type-SOCK_STREAM) |
| 306 | */ |
| 307 | if (++try_loading_module == 1) |
| 308 | request_module("net-pf-%d-proto-%d-type-%d", |
| 309 | PF_INET, protocol, sock->type); |
| 310 | /* |
| 311 | * Fall back to generic, e.g. net-pf-2-proto-132 |
| 312 | * (net-pf-PF_INET-proto-IPPROTO_SCTP) |
| 313 | */ |
| 314 | else |
| 315 | request_module("net-pf-%d-proto-%d", |
| 316 | PF_INET, protocol); |
| 317 | goto lookup_protocol; |
| 318 | } else |
| 319 | goto out_rcu_unlock; |
| 320 | } |
| 321 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | err = -EPERM; |
Chia-chi Yeh | d846068 | 2009-06-30 11:23:04 +0800 | [diff] [blame] | 323 | if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | goto out_rcu_unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | |
| 326 | sock->ops = answer->ops; |
| 327 | answer_prot = answer->prot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | answer_flags = answer->flags; |
| 329 | rcu_read_unlock(); |
| 330 | |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 331 | WARN_ON(!answer_prot->slab); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | |
| 333 | err = -ENOBUFS; |
Eric W. Biederman | 11aa9c2 | 2015-05-08 21:09:13 -0500 | [diff] [blame] | 334 | sk = sk_alloc(net, PF_INET, GFP_KERNEL, answer_prot, kern); |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 335 | if (!sk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | goto out; |
| 337 | |
| 338 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | if (INET_PROTOSW_REUSE & answer_flags) |
Pavel Emelyanov | 4a17fd5 | 2012-04-19 03:39:36 +0000 | [diff] [blame] | 340 | sk->sk_reuse = SK_CAN_REUSE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | |
| 342 | inet = inet_sk(sk); |
Paul Moore | 469de9b | 2007-01-09 14:37:06 -0800 | [diff] [blame] | 343 | inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | |
Jiri Olsa | 7b2ff18 | 2010-06-15 01:07:31 +0000 | [diff] [blame] | 345 | inet->nodefrag = 0; |
| 346 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | if (SOCK_RAW == sock->type) { |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 348 | inet->inet_num = protocol; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | if (IPPROTO_RAW == protocol) |
| 350 | inet->hdrincl = 1; |
| 351 | } |
| 352 | |
Hannes Frederic Sowa | 974eda1 | 2013-12-14 05:13:38 +0100 | [diff] [blame] | 353 | if (net->ipv4.sysctl_ip_no_pmtu_disc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | inet->pmtudisc = IP_PMTUDISC_DONT; |
| 355 | else |
| 356 | inet->pmtudisc = IP_PMTUDISC_WANT; |
| 357 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 358 | inet->inet_id = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | |
| 360 | sock_init_data(sock, sk); |
| 361 | |
| 362 | sk->sk_destruct = inet_sock_destruct; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | sk->sk_protocol = protocol; |
| 364 | sk->sk_backlog_rcv = sk->sk_prot->backlog_rcv; |
| 365 | |
| 366 | inet->uc_ttl = -1; |
| 367 | inet->mc_loop = 1; |
| 368 | inet->mc_ttl = 1; |
Nivedita Singhvi | f771bef | 2009-05-28 07:00:46 +0000 | [diff] [blame] | 369 | inet->mc_all = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | inet->mc_index = 0; |
| 371 | inet->mc_list = NULL; |
Jiri Benc | 4c507d2 | 2012-02-09 09:35:49 +0000 | [diff] [blame] | 372 | inet->rcv_tos = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | |
Arnaldo Carvalho de Melo | e684897 | 2005-08-09 19:45:38 -0700 | [diff] [blame] | 374 | sk_refcnt_debug_inc(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 376 | if (inet->inet_num) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | /* It assumes that any protocol which allows |
| 378 | * the user to assign a number at socket |
| 379 | * creation time automatically |
| 380 | * shares. |
| 381 | */ |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 382 | inet->inet_sport = htons(inet->inet_num); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | /* Add to protocol hash chains. */ |
Craig Gallek | 086c653 | 2016-02-10 11:50:35 -0500 | [diff] [blame] | 384 | err = sk->sk_prot->hash(sk); |
| 385 | if (err) { |
| 386 | sk_common_release(sk); |
| 387 | goto out; |
| 388 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | } |
| 390 | |
| 391 | if (sk->sk_prot->init) { |
| 392 | err = sk->sk_prot->init(sk); |
David Ahern | 6102365 | 2016-12-01 08:48:04 -0800 | [diff] [blame] | 393 | if (err) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | sk_common_release(sk); |
David Ahern | 6102365 | 2016-12-01 08:48:04 -0800 | [diff] [blame] | 395 | goto out; |
| 396 | } |
| 397 | } |
| 398 | |
| 399 | if (!kern) { |
| 400 | err = BPF_CGROUP_RUN_PROG_INET_SOCK(sk); |
| 401 | if (err) { |
| 402 | sk_common_release(sk); |
| 403 | goto out; |
| 404 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | } |
| 406 | out: |
| 407 | return err; |
| 408 | out_rcu_unlock: |
| 409 | rcu_read_unlock(); |
| 410 | goto out; |
| 411 | } |
| 412 | |
| 413 | |
| 414 | /* |
| 415 | * The peer socket should always be NULL (or else). When we call this |
| 416 | * function we are destroying the object and from then on nobody |
| 417 | * should refer to it. |
| 418 | */ |
| 419 | int inet_release(struct socket *sock) |
| 420 | { |
| 421 | struct sock *sk = sock->sk; |
| 422 | |
| 423 | if (sk) { |
| 424 | long timeout; |
| 425 | |
Chenbo Feng | aa284cd | 2017-04-19 14:22:47 -0700 | [diff] [blame] | 426 | #ifdef CONFIG_NETFILTER_XT_MATCH_QTAGUID |
| 427 | qtaguid_untag(sock, true); |
| 428 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | /* Applications forget to leave groups before exiting */ |
| 430 | ip_mc_drop_socket(sk); |
| 431 | |
| 432 | /* If linger is set, we don't return until the close |
| 433 | * is complete. Otherwise we return immediately. The |
| 434 | * actually closing is done the same either way. |
| 435 | * |
| 436 | * If the close is due to the process exiting, we never |
| 437 | * linger.. |
| 438 | */ |
| 439 | timeout = 0; |
| 440 | if (sock_flag(sk, SOCK_LINGER) && |
| 441 | !(current->flags & PF_EXITING)) |
| 442 | timeout = sk->sk_lingertime; |
| 443 | sock->sk = NULL; |
| 444 | sk->sk_prot->close(sk, timeout); |
| 445 | } |
| 446 | return 0; |
| 447 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 448 | EXPORT_SYMBOL(inet_release); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | int inet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) |
| 451 | { |
| 452 | struct sockaddr_in *addr = (struct sockaddr_in *)uaddr; |
| 453 | struct sock *sk = sock->sk; |
| 454 | struct inet_sock *inet = inet_sk(sk); |
Eric W. Biederman | 3594698 | 2012-11-16 03:03:12 +0000 | [diff] [blame] | 455 | struct net *net = sock_net(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | unsigned short snum; |
| 457 | int chk_addr_ret; |
David Ahern | 9b8ff51 | 2015-09-01 14:26:35 -0600 | [diff] [blame] | 458 | u32 tb_id = RT_TABLE_LOCAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | int err; |
| 460 | |
| 461 | /* If the socket has its own bind function then use it. (RAW) */ |
| 462 | if (sk->sk_prot->bind) { |
| 463 | err = sk->sk_prot->bind(sk, uaddr, addr_len); |
| 464 | goto out; |
| 465 | } |
| 466 | err = -EINVAL; |
| 467 | if (addr_len < sizeof(struct sockaddr_in)) |
| 468 | goto out; |
| 469 | |
Marcus Meissner | c349a52 | 2011-07-04 01:30:29 +0000 | [diff] [blame] | 470 | if (addr->sin_family != AF_INET) { |
Eric Dumazet | 29c486d | 2011-08-30 18:57:00 -0400 | [diff] [blame] | 471 | /* Compatibility games : accept AF_UNSPEC (mapped to AF_INET) |
| 472 | * only if s_addr is INADDR_ANY. |
| 473 | */ |
Marcus Meissner | c349a52 | 2011-07-04 01:30:29 +0000 | [diff] [blame] | 474 | err = -EAFNOSUPPORT; |
Eric Dumazet | 29c486d | 2011-08-30 18:57:00 -0400 | [diff] [blame] | 475 | if (addr->sin_family != AF_UNSPEC || |
| 476 | addr->sin_addr.s_addr != htonl(INADDR_ANY)) |
| 477 | goto out; |
Marcus Meissner | c349a52 | 2011-07-04 01:30:29 +0000 | [diff] [blame] | 478 | } |
Marcus Meissner | d0733d2 | 2011-06-01 21:05:22 -0700 | [diff] [blame] | 479 | |
David Ahern | 3236b00 | 2015-09-29 20:07:14 -0700 | [diff] [blame] | 480 | tb_id = l3mdev_fib_table_by_index(net, sk->sk_bound_dev_if) ? : tb_id; |
David Ahern | 30bbaa1 | 2015-08-13 14:59:05 -0600 | [diff] [blame] | 481 | chk_addr_ret = inet_addr_type_table(net, addr->sin_addr.s_addr, tb_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | |
| 483 | /* Not specified by any standard per-se, however it breaks too |
| 484 | * many applications when removed. It is unfortunate since |
| 485 | * allowing applications to make a non-local bind solves |
| 486 | * several problems with systems using dynamic addressing. |
| 487 | * (ie. your servers still start up even if your ISDN link |
| 488 | * is temporarily down) |
| 489 | */ |
| 490 | err = -EADDRNOTAVAIL; |
Vincent Bernat | 49a6015 | 2014-09-05 15:09:03 +0200 | [diff] [blame] | 491 | if (!net->ipv4.sysctl_ip_nonlocal_bind && |
Tóth László Attila | b9fb150 | 2008-10-01 07:31:24 -0700 | [diff] [blame] | 492 | !(inet->freebind || inet->transparent) && |
Al Viro | e6f1ceb | 2008-03-17 22:44:53 -0700 | [diff] [blame] | 493 | addr->sin_addr.s_addr != htonl(INADDR_ANY) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | chk_addr_ret != RTN_LOCAL && |
| 495 | chk_addr_ret != RTN_MULTICAST && |
| 496 | chk_addr_ret != RTN_BROADCAST) |
| 497 | goto out; |
| 498 | |
| 499 | snum = ntohs(addr->sin_port); |
| 500 | err = -EACCES; |
Krister Johansen | 4548b68 | 2017-01-20 17:49:11 -0800 | [diff] [blame] | 501 | if (snum && snum < inet_prot_sock(net) && |
Eric W. Biederman | 3594698 | 2012-11-16 03:03:12 +0000 | [diff] [blame] | 502 | !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | goto out; |
| 504 | |
| 505 | /* We keep a pair of addresses. rcv_saddr is the one |
| 506 | * used by hash lookups, and saddr is used for transmit. |
| 507 | * |
| 508 | * In the BSD API these are the same except where it |
| 509 | * would be illegal to use them (multicast/broadcast) in |
| 510 | * which case the sending device address is used. |
| 511 | */ |
| 512 | lock_sock(sk); |
| 513 | |
| 514 | /* Check these errors (active socket, double bind). */ |
| 515 | err = -EINVAL; |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 516 | if (sk->sk_state != TCP_CLOSE || inet->inet_num) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | goto out_release_sock; |
| 518 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 519 | inet->inet_rcv_saddr = inet->inet_saddr = addr->sin_addr.s_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST) |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 521 | inet->inet_saddr = 0; /* Use device */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | |
| 523 | /* Make sure we are allowed to bind here. */ |
Eric Dumazet | 90c337d | 2015-06-06 21:17:57 -0700 | [diff] [blame] | 524 | if ((snum || !inet->bind_address_no_port) && |
| 525 | sk->sk_prot->get_port(sk, snum)) { |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 526 | inet->inet_saddr = inet->inet_rcv_saddr = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | err = -EADDRINUSE; |
| 528 | goto out_release_sock; |
| 529 | } |
| 530 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 531 | if (inet->inet_rcv_saddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | sk->sk_userlocks |= SOCK_BINDADDR_LOCK; |
| 533 | if (snum) |
| 534 | sk->sk_userlocks |= SOCK_BINDPORT_LOCK; |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 535 | inet->inet_sport = htons(inet->inet_num); |
| 536 | inet->inet_daddr = 0; |
| 537 | inet->inet_dport = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | sk_dst_reset(sk); |
| 539 | err = 0; |
| 540 | out_release_sock: |
| 541 | release_sock(sk); |
| 542 | out: |
| 543 | return err; |
| 544 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 545 | EXPORT_SYMBOL(inet_bind); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | |
Daniel Baluta | 5e73ea1 | 2012-04-15 01:34:41 +0000 | [diff] [blame] | 547 | int inet_dgram_connect(struct socket *sock, struct sockaddr *uaddr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | int addr_len, int flags) |
| 549 | { |
| 550 | struct sock *sk = sock->sk; |
| 551 | |
Changli Gao | 6503d96 | 2010-03-31 22:58:26 +0000 | [diff] [blame] | 552 | if (addr_len < sizeof(uaddr->sa_family)) |
| 553 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | if (uaddr->sa_family == AF_UNSPEC) |
| 555 | return sk->sk_prot->disconnect(sk, flags); |
| 556 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 557 | if (!inet_sk(sk)->inet_num && inet_autobind(sk)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | return -EAGAIN; |
Joe Perches | e319269 | 2012-06-03 17:41:40 +0000 | [diff] [blame] | 559 | return sk->sk_prot->connect(sk, uaddr, addr_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 561 | EXPORT_SYMBOL(inet_dgram_connect); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | |
Yuchung Cheng | 783237e | 2012-07-19 06:43:07 +0000 | [diff] [blame] | 563 | static long inet_wait_for_connect(struct sock *sk, long timeo, int writebias) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | { |
WANG Cong | 14135f3 | 2016-11-01 16:04:36 -0700 | [diff] [blame] | 565 | DEFINE_WAIT_FUNC(wait, woken_wake_function); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | |
WANG Cong | 14135f3 | 2016-11-01 16:04:36 -0700 | [diff] [blame] | 567 | add_wait_queue(sk_sleep(sk), &wait); |
Yuchung Cheng | 783237e | 2012-07-19 06:43:07 +0000 | [diff] [blame] | 568 | sk->sk_write_pending += writebias; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | |
| 570 | /* Basic assumption: if someone sets sk->sk_err, he _must_ |
| 571 | * change state of the socket from TCP_SYN_*. |
| 572 | * Connect() does not allow to get error notifications |
| 573 | * without closing the socket. |
| 574 | */ |
| 575 | while ((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV)) { |
| 576 | release_sock(sk); |
WANG Cong | 14135f3 | 2016-11-01 16:04:36 -0700 | [diff] [blame] | 577 | timeo = wait_woken(&wait, TASK_INTERRUPTIBLE, timeo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | lock_sock(sk); |
| 579 | if (signal_pending(current) || !timeo) |
| 580 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | } |
WANG Cong | 14135f3 | 2016-11-01 16:04:36 -0700 | [diff] [blame] | 582 | remove_wait_queue(sk_sleep(sk), &wait); |
Yuchung Cheng | 783237e | 2012-07-19 06:43:07 +0000 | [diff] [blame] | 583 | sk->sk_write_pending -= writebias; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | return timeo; |
| 585 | } |
| 586 | |
| 587 | /* |
| 588 | * Connect to a remote host. There is regrettably still a little |
| 589 | * TCP 'magic' in here. |
| 590 | */ |
Yuchung Cheng | cf60af0 | 2012-07-19 06:43:09 +0000 | [diff] [blame] | 591 | int __inet_stream_connect(struct socket *sock, struct sockaddr *uaddr, |
Willy Tarreau | 3979ad7 | 2017-01-25 14:42:46 +0100 | [diff] [blame] | 592 | int addr_len, int flags, int is_sendmsg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | { |
| 594 | struct sock *sk = sock->sk; |
| 595 | int err; |
| 596 | long timeo; |
| 597 | |
Wei Wang | 19f6d3f | 2017-01-23 10:59:22 -0800 | [diff] [blame] | 598 | /* |
| 599 | * uaddr can be NULL and addr_len can be 0 if: |
| 600 | * sk is a TCP fastopen active socket and |
| 601 | * TCP_FASTOPEN_CONNECT sockopt is set and |
| 602 | * we already have a valid cookie for this socket. |
| 603 | * In this case, user can call write() after connect(). |
| 604 | * write() will invoke tcp_sendmsg_fastopen() which calls |
| 605 | * __inet_stream_connect(). |
| 606 | */ |
| 607 | if (uaddr) { |
| 608 | if (addr_len < sizeof(uaddr->sa_family)) |
| 609 | return -EINVAL; |
Changli Gao | 6503d96 | 2010-03-31 22:58:26 +0000 | [diff] [blame] | 610 | |
Wei Wang | 19f6d3f | 2017-01-23 10:59:22 -0800 | [diff] [blame] | 611 | if (uaddr->sa_family == AF_UNSPEC) { |
| 612 | err = sk->sk_prot->disconnect(sk, flags); |
| 613 | sock->state = err ? SS_DISCONNECTING : SS_UNCONNECTED; |
| 614 | goto out; |
| 615 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | } |
| 617 | |
| 618 | switch (sock->state) { |
| 619 | default: |
| 620 | err = -EINVAL; |
| 621 | goto out; |
| 622 | case SS_CONNECTED: |
| 623 | err = -EISCONN; |
| 624 | goto out; |
| 625 | case SS_CONNECTING: |
Wei Wang | 19f6d3f | 2017-01-23 10:59:22 -0800 | [diff] [blame] | 626 | if (inet_sk(sk)->defer_connect) |
Willy Tarreau | 3979ad7 | 2017-01-25 14:42:46 +0100 | [diff] [blame] | 627 | err = is_sendmsg ? -EINPROGRESS : -EISCONN; |
Wei Wang | 19f6d3f | 2017-01-23 10:59:22 -0800 | [diff] [blame] | 628 | else |
| 629 | err = -EALREADY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | /* Fall out of switch with err, set for this state */ |
| 631 | break; |
| 632 | case SS_UNCONNECTED: |
| 633 | err = -EISCONN; |
| 634 | if (sk->sk_state != TCP_CLOSE) |
| 635 | goto out; |
| 636 | |
| 637 | err = sk->sk_prot->connect(sk, uaddr, addr_len); |
| 638 | if (err < 0) |
| 639 | goto out; |
| 640 | |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 641 | sock->state = SS_CONNECTING; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | |
Wei Wang | 19f6d3f | 2017-01-23 10:59:22 -0800 | [diff] [blame] | 643 | if (!err && inet_sk(sk)->defer_connect) |
| 644 | goto out; |
| 645 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | /* Just entered SS_CONNECTING state; the only |
| 647 | * difference is that return value in non-blocking |
| 648 | * case is EINPROGRESS, rather than EALREADY. |
| 649 | */ |
| 650 | err = -EINPROGRESS; |
| 651 | break; |
| 652 | } |
| 653 | |
| 654 | timeo = sock_sndtimeo(sk, flags & O_NONBLOCK); |
| 655 | |
| 656 | if ((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV)) { |
Yuchung Cheng | 783237e | 2012-07-19 06:43:07 +0000 | [diff] [blame] | 657 | int writebias = (sk->sk_protocol == IPPROTO_TCP) && |
| 658 | tcp_sk(sk)->fastopen_req && |
| 659 | tcp_sk(sk)->fastopen_req->data ? 1 : 0; |
| 660 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | /* Error code is set above */ |
Yuchung Cheng | 783237e | 2012-07-19 06:43:07 +0000 | [diff] [blame] | 662 | if (!timeo || !inet_wait_for_connect(sk, timeo, writebias)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | goto out; |
| 664 | |
| 665 | err = sock_intr_errno(timeo); |
| 666 | if (signal_pending(current)) |
| 667 | goto out; |
| 668 | } |
| 669 | |
| 670 | /* Connection was closed by RST, timeout, ICMP error |
| 671 | * or another process disconnected us. |
| 672 | */ |
| 673 | if (sk->sk_state == TCP_CLOSE) |
| 674 | goto sock_error; |
| 675 | |
| 676 | /* sk->sk_err may be not zero now, if RECVERR was ordered by user |
| 677 | * and error was received after socket entered established state. |
| 678 | * Hence, it is handled normally after connect() return successfully. |
| 679 | */ |
| 680 | |
| 681 | sock->state = SS_CONNECTED; |
| 682 | err = 0; |
| 683 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | return err; |
| 685 | |
| 686 | sock_error: |
| 687 | err = sock_error(sk) ? : -ECONNABORTED; |
| 688 | sock->state = SS_UNCONNECTED; |
| 689 | if (sk->sk_prot->disconnect(sk, flags)) |
| 690 | sock->state = SS_DISCONNECTING; |
| 691 | goto out; |
| 692 | } |
Yuchung Cheng | cf60af0 | 2012-07-19 06:43:09 +0000 | [diff] [blame] | 693 | EXPORT_SYMBOL(__inet_stream_connect); |
| 694 | |
| 695 | int inet_stream_connect(struct socket *sock, struct sockaddr *uaddr, |
| 696 | int addr_len, int flags) |
| 697 | { |
| 698 | int err; |
| 699 | |
| 700 | lock_sock(sock->sk); |
Willy Tarreau | 3979ad7 | 2017-01-25 14:42:46 +0100 | [diff] [blame] | 701 | err = __inet_stream_connect(sock, uaddr, addr_len, flags, 0); |
Yuchung Cheng | cf60af0 | 2012-07-19 06:43:09 +0000 | [diff] [blame] | 702 | release_sock(sock->sk); |
| 703 | return err; |
| 704 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 705 | EXPORT_SYMBOL(inet_stream_connect); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | |
| 707 | /* |
| 708 | * Accept a pending connection. The TCP layer now gives BSD semantics. |
| 709 | */ |
| 710 | |
David Howells | cdfbabf | 2017-03-09 08:09:05 +0000 | [diff] [blame] | 711 | int inet_accept(struct socket *sock, struct socket *newsock, int flags, |
| 712 | bool kern) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | { |
| 714 | struct sock *sk1 = sock->sk; |
| 715 | int err = -EINVAL; |
David Howells | cdfbabf | 2017-03-09 08:09:05 +0000 | [diff] [blame] | 716 | struct sock *sk2 = sk1->sk_prot->accept(sk1, flags, &err, kern); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | |
| 718 | if (!sk2) |
| 719 | goto do_err; |
| 720 | |
| 721 | lock_sock(sk2); |
| 722 | |
Eric Dumazet | 1eddcea | 2011-06-17 03:45:15 +0000 | [diff] [blame] | 723 | sock_rps_record_flow(sk2); |
Ilpo Järvinen | 547b792 | 2008-07-25 21:43:18 -0700 | [diff] [blame] | 724 | WARN_ON(!((1 << sk2->sk_state) & |
Jerry Chu | 8336886 | 2012-08-31 12:29:12 +0000 | [diff] [blame] | 725 | (TCPF_ESTABLISHED | TCPF_SYN_RECV | |
| 726 | TCPF_CLOSE_WAIT | TCPF_CLOSE))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | |
| 728 | sock_graft(sk2, newsock); |
| 729 | |
| 730 | newsock->state = SS_CONNECTED; |
| 731 | err = 0; |
| 732 | release_sock(sk2); |
| 733 | do_err: |
| 734 | return err; |
| 735 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 736 | EXPORT_SYMBOL(inet_accept); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | |
| 738 | |
| 739 | /* |
| 740 | * This does both peername and sockname. |
| 741 | */ |
| 742 | int inet_getname(struct socket *sock, struct sockaddr *uaddr, |
| 743 | int *uaddr_len, int peer) |
| 744 | { |
| 745 | struct sock *sk = sock->sk; |
| 746 | struct inet_sock *inet = inet_sk(sk); |
Cyrill Gorcunov | 38bfd8f | 2009-10-29 02:59:18 -0700 | [diff] [blame] | 747 | DECLARE_SOCKADDR(struct sockaddr_in *, sin, uaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | |
| 749 | sin->sin_family = AF_INET; |
| 750 | if (peer) { |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 751 | if (!inet->inet_dport || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) && |
| 753 | peer == 1)) |
| 754 | return -ENOTCONN; |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 755 | sin->sin_port = inet->inet_dport; |
| 756 | sin->sin_addr.s_addr = inet->inet_daddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | } else { |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 758 | __be32 addr = inet->inet_rcv_saddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | if (!addr) |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 760 | addr = inet->inet_saddr; |
| 761 | sin->sin_port = inet->inet_sport; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 762 | sin->sin_addr.s_addr = addr; |
| 763 | } |
| 764 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); |
| 765 | *uaddr_len = sizeof(*sin); |
| 766 | return 0; |
| 767 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 768 | EXPORT_SYMBOL(inet_getname); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | |
Ying Xue | 1b78414 | 2015-03-02 15:37:48 +0800 | [diff] [blame] | 770 | int inet_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 771 | { |
| 772 | struct sock *sk = sock->sk; |
| 773 | |
David S. Miller | c58dc01 | 2010-04-27 15:05:31 -0700 | [diff] [blame] | 774 | sock_rps_record_flow(sk); |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 775 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | /* We may need to bind the socket. */ |
Changli Gao | 7ba4291 | 2010-07-10 20:41:55 +0000 | [diff] [blame] | 777 | if (!inet_sk(sk)->inet_num && !sk->sk_prot->no_autobind && |
| 778 | inet_autobind(sk)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | return -EAGAIN; |
| 780 | |
Ying Xue | 1b78414 | 2015-03-02 15:37:48 +0800 | [diff] [blame] | 781 | return sk->sk_prot->sendmsg(sk, msg, size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 783 | EXPORT_SYMBOL(inet_sendmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | |
Changli Gao | 7ba4291 | 2010-07-10 20:41:55 +0000 | [diff] [blame] | 785 | ssize_t inet_sendpage(struct socket *sock, struct page *page, int offset, |
| 786 | size_t size, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | { |
| 788 | struct sock *sk = sock->sk; |
| 789 | |
David S. Miller | c58dc01 | 2010-04-27 15:05:31 -0700 | [diff] [blame] | 790 | sock_rps_record_flow(sk); |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 791 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | /* We may need to bind the socket. */ |
Changli Gao | 7ba4291 | 2010-07-10 20:41:55 +0000 | [diff] [blame] | 793 | if (!inet_sk(sk)->inet_num && !sk->sk_prot->no_autobind && |
| 794 | inet_autobind(sk)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | return -EAGAIN; |
| 796 | |
| 797 | if (sk->sk_prot->sendpage) |
| 798 | return sk->sk_prot->sendpage(sk, page, offset, size, flags); |
| 799 | return sock_no_sendpage(sock, page, offset, size, flags); |
| 800 | } |
Changli Gao | 7ba4291 | 2010-07-10 20:41:55 +0000 | [diff] [blame] | 801 | EXPORT_SYMBOL(inet_sendpage); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | |
Ying Xue | 1b78414 | 2015-03-02 15:37:48 +0800 | [diff] [blame] | 803 | int inet_recvmsg(struct socket *sock, struct msghdr *msg, size_t size, |
| 804 | int flags) |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 805 | { |
| 806 | struct sock *sk = sock->sk; |
| 807 | int addr_len = 0; |
| 808 | int err; |
| 809 | |
David S. Miller | c58dc01 | 2010-04-27 15:05:31 -0700 | [diff] [blame] | 810 | sock_rps_record_flow(sk); |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 811 | |
Ying Xue | 1b78414 | 2015-03-02 15:37:48 +0800 | [diff] [blame] | 812 | err = sk->sk_prot->recvmsg(sk, msg, size, flags & MSG_DONTWAIT, |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 813 | flags & ~MSG_DONTWAIT, &addr_len); |
| 814 | if (err >= 0) |
| 815 | msg->msg_namelen = addr_len; |
| 816 | return err; |
| 817 | } |
| 818 | EXPORT_SYMBOL(inet_recvmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | |
| 820 | int inet_shutdown(struct socket *sock, int how) |
| 821 | { |
| 822 | struct sock *sk = sock->sk; |
| 823 | int err = 0; |
| 824 | |
| 825 | /* This should really check to make sure |
| 826 | * the socket is a TCP socket. (WHY AC...) |
| 827 | */ |
| 828 | how++; /* maps 0->1 has the advantage of making bit 1 rcvs and |
| 829 | 1->2 bit 2 snds. |
| 830 | 2->3 */ |
| 831 | if ((how & ~SHUTDOWN_MASK) || !how) /* MAXINT->0 */ |
| 832 | return -EINVAL; |
| 833 | |
| 834 | lock_sock(sk); |
| 835 | if (sock->state == SS_CONNECTING) { |
| 836 | if ((1 << sk->sk_state) & |
| 837 | (TCPF_SYN_SENT | TCPF_SYN_RECV | TCPF_CLOSE)) |
| 838 | sock->state = SS_DISCONNECTING; |
| 839 | else |
| 840 | sock->state = SS_CONNECTED; |
| 841 | } |
| 842 | |
| 843 | switch (sk->sk_state) { |
| 844 | case TCP_CLOSE: |
| 845 | err = -ENOTCONN; |
| 846 | /* Hack to wake up other listeners, who can poll for |
| 847 | POLLHUP, even on eg. unconnected UDP sockets -- RR */ |
| 848 | default: |
| 849 | sk->sk_shutdown |= how; |
| 850 | if (sk->sk_prot->shutdown) |
| 851 | sk->sk_prot->shutdown(sk, how); |
| 852 | break; |
| 853 | |
| 854 | /* Remaining two branches are temporary solution for missing |
| 855 | * close() in multithreaded environment. It is _not_ a good idea, |
| 856 | * but we have no choice until close() is repaired at VFS level. |
| 857 | */ |
| 858 | case TCP_LISTEN: |
| 859 | if (!(how & RCV_SHUTDOWN)) |
| 860 | break; |
| 861 | /* Fall through */ |
| 862 | case TCP_SYN_SENT: |
| 863 | err = sk->sk_prot->disconnect(sk, O_NONBLOCK); |
| 864 | sock->state = err ? SS_DISCONNECTING : SS_UNCONNECTED; |
| 865 | break; |
| 866 | } |
| 867 | |
| 868 | /* Wake up anyone sleeping in poll. */ |
| 869 | sk->sk_state_change(sk); |
| 870 | release_sock(sk); |
| 871 | return err; |
| 872 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 873 | EXPORT_SYMBOL(inet_shutdown); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 874 | |
| 875 | /* |
| 876 | * ioctl() calls you can issue on an INET socket. Most of these are |
| 877 | * device configuration and stuff and very rarely used. Some ioctls |
| 878 | * pass on to the socket itself. |
| 879 | * |
| 880 | * NOTE: I like the idea of a module for the config stuff. ie ifconfig |
| 881 | * loads the devconfigure module does its configuring and unloads it. |
| 882 | * There's a good 20K of config code hanging around the kernel. |
| 883 | */ |
| 884 | |
| 885 | int inet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
| 886 | { |
| 887 | struct sock *sk = sock->sk; |
| 888 | int err = 0; |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 889 | struct net *net = sock_net(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | |
| 891 | switch (cmd) { |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 892 | case SIOCGSTAMP: |
| 893 | err = sock_get_timestamp(sk, (struct timeval __user *)arg); |
| 894 | break; |
| 895 | case SIOCGSTAMPNS: |
| 896 | err = sock_get_timestampns(sk, (struct timespec __user *)arg); |
| 897 | break; |
| 898 | case SIOCADDRT: |
| 899 | case SIOCDELRT: |
| 900 | case SIOCRTMSG: |
| 901 | err = ip_rt_ioctl(net, cmd, (void __user *)arg); |
| 902 | break; |
| 903 | case SIOCDARP: |
| 904 | case SIOCGARP: |
| 905 | case SIOCSARP: |
| 906 | err = arp_ioctl(net, cmd, (void __user *)arg); |
| 907 | break; |
| 908 | case SIOCGIFADDR: |
| 909 | case SIOCSIFADDR: |
| 910 | case SIOCGIFBRDADDR: |
| 911 | case SIOCSIFBRDADDR: |
| 912 | case SIOCGIFNETMASK: |
| 913 | case SIOCSIFNETMASK: |
| 914 | case SIOCGIFDSTADDR: |
| 915 | case SIOCSIFDSTADDR: |
| 916 | case SIOCSIFPFLAGS: |
| 917 | case SIOCGIFPFLAGS: |
| 918 | case SIOCSIFFLAGS: |
| 919 | err = devinet_ioctl(net, cmd, (void __user *)arg); |
| 920 | break; |
| 921 | default: |
| 922 | if (sk->sk_prot->ioctl) |
| 923 | err = sk->sk_prot->ioctl(sk, cmd, arg); |
| 924 | else |
| 925 | err = -ENOIOCTLCMD; |
| 926 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 927 | } |
| 928 | return err; |
| 929 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 930 | EXPORT_SYMBOL(inet_ioctl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | |
Eric W. Biederman | 709b46e | 2011-01-29 16:15:56 +0000 | [diff] [blame] | 932 | #ifdef CONFIG_COMPAT |
Gerrit Renker | 686dc6b | 2011-10-15 09:26:56 +0000 | [diff] [blame] | 933 | static int inet_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
Eric W. Biederman | 709b46e | 2011-01-29 16:15:56 +0000 | [diff] [blame] | 934 | { |
| 935 | struct sock *sk = sock->sk; |
| 936 | int err = -ENOIOCTLCMD; |
| 937 | |
| 938 | if (sk->sk_prot->compat_ioctl) |
| 939 | err = sk->sk_prot->compat_ioctl(sk, cmd, arg); |
| 940 | |
| 941 | return err; |
| 942 | } |
| 943 | #endif |
| 944 | |
Eric Dumazet | 90ddc4f | 2005-12-22 12:49:22 -0800 | [diff] [blame] | 945 | const struct proto_ops inet_stream_ops = { |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 946 | .family = PF_INET, |
| 947 | .owner = THIS_MODULE, |
| 948 | .release = inet_release, |
| 949 | .bind = inet_bind, |
| 950 | .connect = inet_stream_connect, |
| 951 | .socketpair = sock_no_socketpair, |
| 952 | .accept = inet_accept, |
| 953 | .getname = inet_getname, |
| 954 | .poll = tcp_poll, |
| 955 | .ioctl = inet_ioctl, |
| 956 | .listen = inet_listen, |
| 957 | .shutdown = inet_shutdown, |
| 958 | .setsockopt = sock_common_setsockopt, |
| 959 | .getsockopt = sock_common_getsockopt, |
Changli Gao | 7ba4291 | 2010-07-10 20:41:55 +0000 | [diff] [blame] | 960 | .sendmsg = inet_sendmsg, |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 961 | .recvmsg = inet_recvmsg, |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 962 | .mmap = sock_no_mmap, |
Changli Gao | 7ba4291 | 2010-07-10 20:41:55 +0000 | [diff] [blame] | 963 | .sendpage = inet_sendpage, |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 964 | .splice_read = tcp_splice_read, |
Tom Herbert | 3203558 | 2016-08-28 14:43:18 -0700 | [diff] [blame] | 965 | .read_sock = tcp_read_sock, |
Tom Herbert | 306b13e | 2017-07-28 16:22:41 -0700 | [diff] [blame] | 966 | .sendmsg_locked = tcp_sendmsg_locked, |
| 967 | .sendpage_locked = tcp_sendpage_locked, |
Tom Herbert | 3203558 | 2016-08-28 14:43:18 -0700 | [diff] [blame] | 968 | .peek_len = tcp_peek_len, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 969 | #ifdef CONFIG_COMPAT |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 970 | .compat_setsockopt = compat_sock_common_setsockopt, |
| 971 | .compat_getsockopt = compat_sock_common_getsockopt, |
Eric W. Biederman | 709b46e | 2011-01-29 16:15:56 +0000 | [diff] [blame] | 972 | .compat_ioctl = inet_compat_ioctl, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 973 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 974 | }; |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 975 | EXPORT_SYMBOL(inet_stream_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 976 | |
Eric Dumazet | 90ddc4f | 2005-12-22 12:49:22 -0800 | [diff] [blame] | 977 | const struct proto_ops inet_dgram_ops = { |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 978 | .family = PF_INET, |
| 979 | .owner = THIS_MODULE, |
| 980 | .release = inet_release, |
| 981 | .bind = inet_bind, |
| 982 | .connect = inet_dgram_connect, |
| 983 | .socketpair = sock_no_socketpair, |
| 984 | .accept = sock_no_accept, |
| 985 | .getname = inet_getname, |
| 986 | .poll = udp_poll, |
| 987 | .ioctl = inet_ioctl, |
| 988 | .listen = sock_no_listen, |
| 989 | .shutdown = inet_shutdown, |
| 990 | .setsockopt = sock_common_setsockopt, |
| 991 | .getsockopt = sock_common_getsockopt, |
| 992 | .sendmsg = inet_sendmsg, |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 993 | .recvmsg = inet_recvmsg, |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 994 | .mmap = sock_no_mmap, |
| 995 | .sendpage = inet_sendpage, |
samanthakumar | 627d2d6 | 2016-04-05 12:41:16 -0400 | [diff] [blame] | 996 | .set_peek_off = sk_set_peek_off, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 997 | #ifdef CONFIG_COMPAT |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 998 | .compat_setsockopt = compat_sock_common_setsockopt, |
| 999 | .compat_getsockopt = compat_sock_common_getsockopt, |
Eric W. Biederman | 709b46e | 2011-01-29 16:15:56 +0000 | [diff] [blame] | 1000 | .compat_ioctl = inet_compat_ioctl, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 1001 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1002 | }; |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 1003 | EXPORT_SYMBOL(inet_dgram_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | |
| 1005 | /* |
| 1006 | * For SOCK_RAW sockets; should be the same as inet_dgram_ops but without |
| 1007 | * udp_poll |
| 1008 | */ |
Eric Dumazet | 90ddc4f | 2005-12-22 12:49:22 -0800 | [diff] [blame] | 1009 | static const struct proto_ops inet_sockraw_ops = { |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 1010 | .family = PF_INET, |
| 1011 | .owner = THIS_MODULE, |
| 1012 | .release = inet_release, |
| 1013 | .bind = inet_bind, |
| 1014 | .connect = inet_dgram_connect, |
| 1015 | .socketpair = sock_no_socketpair, |
| 1016 | .accept = sock_no_accept, |
| 1017 | .getname = inet_getname, |
| 1018 | .poll = datagram_poll, |
| 1019 | .ioctl = inet_ioctl, |
| 1020 | .listen = sock_no_listen, |
| 1021 | .shutdown = inet_shutdown, |
| 1022 | .setsockopt = sock_common_setsockopt, |
| 1023 | .getsockopt = sock_common_getsockopt, |
| 1024 | .sendmsg = inet_sendmsg, |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 1025 | .recvmsg = inet_recvmsg, |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 1026 | .mmap = sock_no_mmap, |
| 1027 | .sendpage = inet_sendpage, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 1028 | #ifdef CONFIG_COMPAT |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 1029 | .compat_setsockopt = compat_sock_common_setsockopt, |
| 1030 | .compat_getsockopt = compat_sock_common_getsockopt, |
Eric W. Biederman | 709b46e | 2011-01-29 16:15:56 +0000 | [diff] [blame] | 1031 | .compat_ioctl = inet_compat_ioctl, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 1032 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1033 | }; |
| 1034 | |
Stephen Hemminger | ec1b4cf | 2009-10-05 05:58:39 +0000 | [diff] [blame] | 1035 | static const struct net_proto_family inet_family_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1036 | .family = PF_INET, |
| 1037 | .create = inet_create, |
| 1038 | .owner = THIS_MODULE, |
| 1039 | }; |
| 1040 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1041 | /* Upon startup we insert all the elements in inetsw_array[] into |
| 1042 | * the linked list inetsw. |
| 1043 | */ |
| 1044 | static struct inet_protosw inetsw_array[] = |
| 1045 | { |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1046 | { |
| 1047 | .type = SOCK_STREAM, |
| 1048 | .protocol = IPPROTO_TCP, |
| 1049 | .prot = &tcp_prot, |
| 1050 | .ops = &inet_stream_ops, |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1051 | .flags = INET_PROTOSW_PERMANENT | |
Arnaldo Carvalho de Melo | d83d846 | 2005-12-13 23:26:10 -0800 | [diff] [blame] | 1052 | INET_PROTOSW_ICSK, |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1053 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1054 | |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1055 | { |
| 1056 | .type = SOCK_DGRAM, |
| 1057 | .protocol = IPPROTO_UDP, |
| 1058 | .prot = &udp_prot, |
| 1059 | .ops = &inet_dgram_ops, |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1060 | .flags = INET_PROTOSW_PERMANENT, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1061 | }, |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1062 | |
Vasiliy Kulikov | c319b4d | 2011-05-13 10:01:00 +0000 | [diff] [blame] | 1063 | { |
| 1064 | .type = SOCK_DGRAM, |
| 1065 | .protocol = IPPROTO_ICMP, |
| 1066 | .prot = &ping_prot, |
Eric Dumazet | 77d4b1d | 2017-06-03 09:29:25 -0700 | [diff] [blame] | 1067 | .ops = &inet_sockraw_ops, |
Vasiliy Kulikov | c319b4d | 2011-05-13 10:01:00 +0000 | [diff] [blame] | 1068 | .flags = INET_PROTOSW_REUSE, |
| 1069 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1070 | |
| 1071 | { |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1072 | .type = SOCK_RAW, |
| 1073 | .protocol = IPPROTO_IP, /* wild card */ |
| 1074 | .prot = &raw_prot, |
| 1075 | .ops = &inet_sockraw_ops, |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1076 | .flags = INET_PROTOSW_REUSE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | } |
| 1078 | }; |
| 1079 | |
Denis Cheng | c40f6ff | 2007-09-16 16:39:25 -0700 | [diff] [blame] | 1080 | #define INETSW_ARRAY_LEN ARRAY_SIZE(inetsw_array) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1081 | |
| 1082 | void inet_register_protosw(struct inet_protosw *p) |
| 1083 | { |
| 1084 | struct list_head *lh; |
| 1085 | struct inet_protosw *answer; |
| 1086 | int protocol = p->protocol; |
| 1087 | struct list_head *last_perm; |
| 1088 | |
| 1089 | spin_lock_bh(&inetsw_lock); |
| 1090 | |
| 1091 | if (p->type >= SOCK_MAX) |
| 1092 | goto out_illegal; |
| 1093 | |
| 1094 | /* If we are trying to override a permanent protocol, bail. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1095 | last_perm = &inetsw[p->type]; |
| 1096 | list_for_each(lh, &inetsw[p->type]) { |
| 1097 | answer = list_entry(lh, struct inet_protosw, list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | /* Check only the non-wild match. */ |
Junwei Zhang | f6c5333 | 2015-09-18 00:00:05 -0400 | [diff] [blame] | 1099 | if ((INET_PROTOSW_PERMANENT & answer->flags) == 0) |
| 1100 | break; |
| 1101 | if (protocol == answer->protocol) |
| 1102 | goto out_permanent; |
| 1103 | last_perm = lh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1104 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1105 | |
| 1106 | /* Add the new entry after the last permanent entry if any, so that |
| 1107 | * the new entry does not override a permanent entry when matched with |
| 1108 | * a wild-card protocol. But it is allowed to override any existing |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1109 | * non-permanent entry. This means that when we remove this entry, the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1110 | * system automatically returns to the old behavior. |
| 1111 | */ |
| 1112 | list_add_rcu(&p->list, last_perm); |
| 1113 | out: |
| 1114 | spin_unlock_bh(&inetsw_lock); |
| 1115 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1116 | return; |
| 1117 | |
| 1118 | out_permanent: |
Joe Perches | 058bd4d | 2012-03-11 18:36:11 +0000 | [diff] [blame] | 1119 | pr_err("Attempt to override permanent protocol %d\n", protocol); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1120 | goto out; |
| 1121 | |
| 1122 | out_illegal: |
Joe Perches | 058bd4d | 2012-03-11 18:36:11 +0000 | [diff] [blame] | 1123 | pr_err("Ignoring attempt to register invalid socket type %d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1124 | p->type); |
| 1125 | goto out; |
| 1126 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 1127 | EXPORT_SYMBOL(inet_register_protosw); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1128 | |
| 1129 | void inet_unregister_protosw(struct inet_protosw *p) |
| 1130 | { |
| 1131 | if (INET_PROTOSW_PERMANENT & p->flags) { |
Joe Perches | 058bd4d | 2012-03-11 18:36:11 +0000 | [diff] [blame] | 1132 | pr_err("Attempt to unregister permanent protocol %d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1133 | p->protocol); |
| 1134 | } else { |
| 1135 | spin_lock_bh(&inetsw_lock); |
| 1136 | list_del_rcu(&p->list); |
| 1137 | spin_unlock_bh(&inetsw_lock); |
| 1138 | |
| 1139 | synchronize_net(); |
| 1140 | } |
| 1141 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 1142 | EXPORT_SYMBOL(inet_unregister_protosw); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1143 | |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1144 | static int inet_sk_reselect_saddr(struct sock *sk) |
| 1145 | { |
| 1146 | struct inet_sock *inet = inet_sk(sk); |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 1147 | __be32 old_saddr = inet->inet_saddr; |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 1148 | __be32 daddr = inet->inet_daddr; |
David S. Miller | 6e86913 | 2011-05-06 16:18:04 -0700 | [diff] [blame] | 1149 | struct flowi4 *fl4; |
David S. Miller | b23dd4f | 2011-03-02 14:31:35 -0800 | [diff] [blame] | 1150 | struct rtable *rt; |
| 1151 | __be32 new_saddr; |
Eric Dumazet | f6d8bd0 | 2011-04-21 09:45:37 +0000 | [diff] [blame] | 1152 | struct ip_options_rcu *inet_opt; |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1153 | |
Eric Dumazet | f6d8bd0 | 2011-04-21 09:45:37 +0000 | [diff] [blame] | 1154 | inet_opt = rcu_dereference_protected(inet->inet_opt, |
Hannes Frederic Sowa | 1e1d04e | 2016-04-05 17:10:15 +0200 | [diff] [blame] | 1155 | lockdep_sock_is_held(sk)); |
Eric Dumazet | f6d8bd0 | 2011-04-21 09:45:37 +0000 | [diff] [blame] | 1156 | if (inet_opt && inet_opt->opt.srr) |
| 1157 | daddr = inet_opt->opt.faddr; |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1158 | |
| 1159 | /* Query new route. */ |
David S. Miller | 6e86913 | 2011-05-06 16:18:04 -0700 | [diff] [blame] | 1160 | fl4 = &inet->cork.fl.u.ip4; |
| 1161 | rt = ip_route_connect(fl4, daddr, 0, RT_CONN_FLAGS(sk), |
David S. Miller | b23dd4f | 2011-03-02 14:31:35 -0800 | [diff] [blame] | 1162 | sk->sk_bound_dev_if, sk->sk_protocol, |
Steffen Klassert | 0e0d44a | 2013-08-28 08:04:14 +0200 | [diff] [blame] | 1163 | inet->inet_sport, inet->inet_dport, sk); |
David S. Miller | b23dd4f | 2011-03-02 14:31:35 -0800 | [diff] [blame] | 1164 | if (IS_ERR(rt)) |
| 1165 | return PTR_ERR(rt); |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1166 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1167 | sk_setup_caps(sk, &rt->dst); |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1168 | |
David S. Miller | 6e86913 | 2011-05-06 16:18:04 -0700 | [diff] [blame] | 1169 | new_saddr = fl4->saddr; |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1170 | |
| 1171 | if (new_saddr == old_saddr) |
| 1172 | return 0; |
| 1173 | |
Nikolay Borisov | 287b7f3 | 2016-02-15 12:11:29 +0200 | [diff] [blame] | 1174 | if (sock_net(sk)->ipv4.sysctl_ip_dynaddr > 1) { |
Joe Perches | 058bd4d | 2012-03-11 18:36:11 +0000 | [diff] [blame] | 1175 | pr_info("%s(): shifting inet->saddr from %pI4 to %pI4\n", |
| 1176 | __func__, &old_saddr, &new_saddr); |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1177 | } |
| 1178 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 1179 | inet->inet_saddr = inet->inet_rcv_saddr = new_saddr; |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1180 | |
| 1181 | /* |
| 1182 | * XXX The only one ugly spot where we need to |
| 1183 | * XXX really change the sockets identity after |
| 1184 | * XXX it has entered the hashes. -DaveM |
| 1185 | * |
| 1186 | * Besides that, it does not check for connection |
| 1187 | * uniqueness. Wait for troubles. |
| 1188 | */ |
Craig Gallek | 086c653 | 2016-02-10 11:50:35 -0500 | [diff] [blame] | 1189 | return __sk_prot_rehash(sk); |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1190 | } |
| 1191 | |
| 1192 | int inet_sk_rebuild_header(struct sock *sk) |
| 1193 | { |
| 1194 | struct inet_sock *inet = inet_sk(sk); |
| 1195 | struct rtable *rt = (struct rtable *)__sk_dst_check(sk, 0); |
Al Viro | 3ca3c68 | 2006-09-27 18:28:07 -0700 | [diff] [blame] | 1196 | __be32 daddr; |
Eric Dumazet | f6d8bd0 | 2011-04-21 09:45:37 +0000 | [diff] [blame] | 1197 | struct ip_options_rcu *inet_opt; |
David S. Miller | 6e86913 | 2011-05-06 16:18:04 -0700 | [diff] [blame] | 1198 | struct flowi4 *fl4; |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1199 | int err; |
| 1200 | |
| 1201 | /* Route is OK, nothing to do. */ |
| 1202 | if (rt) |
| 1203 | return 0; |
| 1204 | |
| 1205 | /* Reroute. */ |
Eric Dumazet | f6d8bd0 | 2011-04-21 09:45:37 +0000 | [diff] [blame] | 1206 | rcu_read_lock(); |
| 1207 | inet_opt = rcu_dereference(inet->inet_opt); |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 1208 | daddr = inet->inet_daddr; |
Eric Dumazet | f6d8bd0 | 2011-04-21 09:45:37 +0000 | [diff] [blame] | 1209 | if (inet_opt && inet_opt->opt.srr) |
| 1210 | daddr = inet_opt->opt.faddr; |
| 1211 | rcu_read_unlock(); |
David S. Miller | 6e86913 | 2011-05-06 16:18:04 -0700 | [diff] [blame] | 1212 | fl4 = &inet->cork.fl.u.ip4; |
| 1213 | rt = ip_route_output_ports(sock_net(sk), fl4, sk, daddr, inet->inet_saddr, |
David S. Miller | 78fbfd8 | 2011-03-12 00:00:52 -0500 | [diff] [blame] | 1214 | inet->inet_dport, inet->inet_sport, |
| 1215 | sk->sk_protocol, RT_CONN_FLAGS(sk), |
| 1216 | sk->sk_bound_dev_if); |
David S. Miller | b23dd4f | 2011-03-02 14:31:35 -0800 | [diff] [blame] | 1217 | if (!IS_ERR(rt)) { |
| 1218 | err = 0; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1219 | sk_setup_caps(sk, &rt->dst); |
David S. Miller | b23dd4f | 2011-03-02 14:31:35 -0800 | [diff] [blame] | 1220 | } else { |
| 1221 | err = PTR_ERR(rt); |
| 1222 | |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1223 | /* Routing failed... */ |
| 1224 | sk->sk_route_caps = 0; |
| 1225 | /* |
| 1226 | * Other protocols have to map its equivalent state to TCP_SYN_SENT. |
| 1227 | * DCCP maps its DCCP_REQUESTING state to TCP_SYN_SENT. -acme |
| 1228 | */ |
Nikolay Borisov | 287b7f3 | 2016-02-15 12:11:29 +0200 | [diff] [blame] | 1229 | if (!sock_net(sk)->ipv4.sysctl_ip_dynaddr || |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1230 | sk->sk_state != TCP_SYN_SENT || |
| 1231 | (sk->sk_userlocks & SOCK_BINDADDR_LOCK) || |
| 1232 | (err = inet_sk_reselect_saddr(sk)) != 0) |
| 1233 | sk->sk_err_soft = -err; |
| 1234 | } |
| 1235 | |
| 1236 | return err; |
| 1237 | } |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1238 | EXPORT_SYMBOL(inet_sk_rebuild_header); |
| 1239 | |
Tom Herbert | b8921ca | 2016-05-18 09:06:23 -0700 | [diff] [blame] | 1240 | struct sk_buff *inet_gso_segment(struct sk_buff *skb, |
| 1241 | netdev_features_t features) |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1242 | { |
Willem de Bruijn | 6033560 | 2017-11-21 10:22:25 -0500 | [diff] [blame] | 1243 | bool udpfrag = false, fixedid = false, gso_partial, encap; |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1244 | struct sk_buff *segs = ERR_PTR(-EINVAL); |
Vlad Yasevich | bca49f8 | 2012-11-15 08:49:14 +0000 | [diff] [blame] | 1245 | const struct net_offload *ops; |
Willem de Bruijn | 6033560 | 2017-11-21 10:22:25 -0500 | [diff] [blame] | 1246 | unsigned int offset = 0; |
David S. Miller | f9242b6 | 2012-06-19 18:56:21 -0700 | [diff] [blame] | 1247 | struct iphdr *iph; |
Alexander Duyck | 802ab55 | 2016-04-10 21:45:03 -0400 | [diff] [blame] | 1248 | int proto, tot_len; |
Eric Dumazet | 3347c96 | 2013-10-19 11:42:56 -0700 | [diff] [blame] | 1249 | int nhoff; |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1250 | int ihl; |
| 1251 | int id; |
| 1252 | |
Eric Dumazet | 3347c96 | 2013-10-19 11:42:56 -0700 | [diff] [blame] | 1253 | skb_reset_network_header(skb); |
| 1254 | nhoff = skb_network_header(skb) - skb_mac_header(skb); |
Herbert Xu | bbcf467 | 2006-07-03 19:38:35 -0700 | [diff] [blame] | 1255 | if (unlikely(!pskb_may_pull(skb, sizeof(*iph)))) |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1256 | goto out; |
| 1257 | |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 1258 | iph = ip_hdr(skb); |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1259 | ihl = iph->ihl * 4; |
| 1260 | if (ihl < sizeof(*iph)) |
| 1261 | goto out; |
| 1262 | |
Eric Dumazet | 47d27aa | 2013-10-18 13:13:27 -0700 | [diff] [blame] | 1263 | id = ntohs(iph->id); |
| 1264 | proto = iph->protocol; |
| 1265 | |
| 1266 | /* Warning: after this point, iph might be no longer valid */ |
Herbert Xu | bbcf467 | 2006-07-03 19:38:35 -0700 | [diff] [blame] | 1267 | if (unlikely(!pskb_may_pull(skb, ihl))) |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1268 | goto out; |
Eric Dumazet | 47d27aa | 2013-10-18 13:13:27 -0700 | [diff] [blame] | 1269 | __skb_pull(skb, ihl); |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1270 | |
Eric Dumazet | 8c3a897 | 2013-10-27 18:18:16 -0700 | [diff] [blame] | 1271 | encap = SKB_GSO_CB(skb)->encap_level > 0; |
| 1272 | if (encap) |
Florian Westphal | 1e16aa3 | 2014-10-20 13:49:16 +0200 | [diff] [blame] | 1273 | features &= skb->dev->hw_enc_features; |
Eric Dumazet | 3347c96 | 2013-10-19 11:42:56 -0700 | [diff] [blame] | 1274 | SKB_GSO_CB(skb)->encap_level += ihl; |
Pravin B Shelar | 7313626 | 2013-03-07 13:21:51 +0000 | [diff] [blame] | 1275 | |
Arnaldo Carvalho de Melo | badff6d | 2007-03-13 13:06:52 -0300 | [diff] [blame] | 1276 | skb_reset_transport_header(skb); |
Eric Dumazet | 47d27aa | 2013-10-18 13:13:27 -0700 | [diff] [blame] | 1277 | |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1278 | segs = ERR_PTR(-EPROTONOSUPPORT); |
| 1279 | |
Alexander Duyck | cbc53e0 | 2016-04-10 21:44:51 -0400 | [diff] [blame] | 1280 | if (!skb->encapsulation || encap) { |
Willem de Bruijn | 6033560 | 2017-11-21 10:22:25 -0500 | [diff] [blame] | 1281 | udpfrag = !!(skb_shinfo(skb)->gso_type & SKB_GSO_UDP); |
Alexander Duyck | cbc53e0 | 2016-04-10 21:44:51 -0400 | [diff] [blame] | 1282 | fixedid = !!(skb_shinfo(skb)->gso_type & SKB_GSO_TCP_FIXEDID); |
| 1283 | |
| 1284 | /* fixed ID is invalid if DF bit is not set */ |
Arnaldo Carvalho de Melo | a510887 | 2016-11-28 12:36:58 -0300 | [diff] [blame] | 1285 | if (fixedid && !(ip_hdr(skb)->frag_off & htons(IP_DF))) |
Alexander Duyck | cbc53e0 | 2016-04-10 21:44:51 -0400 | [diff] [blame] | 1286 | goto out; |
| 1287 | } |
Eric Dumazet | dcd6077 | 2013-11-07 18:32:06 -0800 | [diff] [blame] | 1288 | |
Vlad Yasevich | bca49f8 | 2012-11-15 08:49:14 +0000 | [diff] [blame] | 1289 | ops = rcu_dereference(inet_offloads[proto]); |
Vlad Yasevich | f191a1d | 2012-11-15 08:49:23 +0000 | [diff] [blame] | 1290 | if (likely(ops && ops->callbacks.gso_segment)) |
| 1291 | segs = ops->callbacks.gso_segment(skb, features); |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1292 | |
YOSHIFUJI Hideaki / 吉藤英明 | 50c3a48 | 2013-01-22 06:32:49 +0000 | [diff] [blame] | 1293 | if (IS_ERR_OR_NULL(segs)) |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1294 | goto out; |
| 1295 | |
Steffen Klassert | 07b26c9 | 2016-09-19 12:58:47 +0200 | [diff] [blame] | 1296 | gso_partial = !!(skb_shinfo(segs)->gso_type & SKB_GSO_PARTIAL); |
| 1297 | |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1298 | skb = segs; |
| 1299 | do { |
Eric Dumazet | 3347c96 | 2013-10-19 11:42:56 -0700 | [diff] [blame] | 1300 | iph = (struct iphdr *)(skb_mac_header(skb) + nhoff); |
Willem de Bruijn | 6033560 | 2017-11-21 10:22:25 -0500 | [diff] [blame] | 1301 | if (udpfrag) { |
| 1302 | iph->frag_off = htons(offset >> 3); |
| 1303 | if (skb->next) |
| 1304 | iph->frag_off |= htons(IP_MF); |
| 1305 | offset += skb->len - nhoff - ihl; |
| 1306 | tot_len = skb->len - nhoff; |
| 1307 | } else if (skb_is_gso(skb)) { |
Alexander Duyck | 802ab55 | 2016-04-10 21:45:03 -0400 | [diff] [blame] | 1308 | if (!fixedid) { |
| 1309 | iph->id = htons(id); |
| 1310 | id += skb_shinfo(skb)->gso_segs; |
| 1311 | } |
Steffen Klassert | 07b26c9 | 2016-09-19 12:58:47 +0200 | [diff] [blame] | 1312 | |
| 1313 | if (gso_partial) |
| 1314 | tot_len = skb_shinfo(skb)->gso_size + |
| 1315 | SKB_GSO_CB(skb)->data_offset + |
| 1316 | skb->head - (unsigned char *)iph; |
| 1317 | else |
| 1318 | tot_len = skb->len - nhoff; |
Alexander Duyck | 802ab55 | 2016-04-10 21:45:03 -0400 | [diff] [blame] | 1319 | } else { |
| 1320 | if (!fixedid) |
| 1321 | iph->id = htons(id++); |
| 1322 | tot_len = skb->len - nhoff; |
Pravin B Shelar | 490ab08 | 2013-02-22 07:30:30 +0000 | [diff] [blame] | 1323 | } |
Alexander Duyck | 802ab55 | 2016-04-10 21:45:03 -0400 | [diff] [blame] | 1324 | iph->tot_len = htons(tot_len); |
Eric Dumazet | 47d27aa | 2013-10-18 13:13:27 -0700 | [diff] [blame] | 1325 | ip_send_check(iph); |
Eric Dumazet | 8c3a897 | 2013-10-27 18:18:16 -0700 | [diff] [blame] | 1326 | if (encap) |
Eric Dumazet | 3347c96 | 2013-10-19 11:42:56 -0700 | [diff] [blame] | 1327 | skb_reset_inner_headers(skb); |
Eric Dumazet | 3347c96 | 2013-10-19 11:42:56 -0700 | [diff] [blame] | 1328 | skb->network_header = (u8 *)iph - skb->head; |
Toke Høiland-Jørgensen | 13a4705 | 2018-09-13 16:43:07 +0200 | [diff] [blame] | 1329 | skb_reset_mac_len(skb); |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1330 | } while ((skb = skb->next)); |
| 1331 | |
| 1332 | out: |
| 1333 | return segs; |
| 1334 | } |
Tom Herbert | b8921ca | 2016-05-18 09:06:23 -0700 | [diff] [blame] | 1335 | EXPORT_SYMBOL(inet_gso_segment); |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1336 | |
Tom Herbert | b8921ca | 2016-05-18 09:06:23 -0700 | [diff] [blame] | 1337 | struct sk_buff **inet_gro_receive(struct sk_buff **head, struct sk_buff *skb) |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1338 | { |
Vlad Yasevich | bca49f8 | 2012-11-15 08:49:14 +0000 | [diff] [blame] | 1339 | const struct net_offload *ops; |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1340 | struct sk_buff **pp = NULL; |
| 1341 | struct sk_buff *p; |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1342 | const struct iphdr *iph; |
Herbert Xu | a5b1cf2 | 2009-05-26 18:50:28 +0000 | [diff] [blame] | 1343 | unsigned int hlen; |
| 1344 | unsigned int off; |
Herbert Xu | 1075f3f | 2009-05-26 18:50:29 +0000 | [diff] [blame] | 1345 | unsigned int id; |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1346 | int flush = 1; |
| 1347 | int proto; |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1348 | |
Herbert Xu | a5b1cf2 | 2009-05-26 18:50:28 +0000 | [diff] [blame] | 1349 | off = skb_gro_offset(skb); |
| 1350 | hlen = off + sizeof(*iph); |
| 1351 | iph = skb_gro_header_fast(skb, off); |
| 1352 | if (skb_gro_header_hard(skb, hlen)) { |
| 1353 | iph = skb_gro_header_slow(skb, hlen, off); |
| 1354 | if (unlikely(!iph)) |
| 1355 | goto out; |
| 1356 | } |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1357 | |
David S. Miller | f9242b6 | 2012-06-19 18:56:21 -0700 | [diff] [blame] | 1358 | proto = iph->protocol; |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1359 | |
| 1360 | rcu_read_lock(); |
Vlad Yasevich | bca49f8 | 2012-11-15 08:49:14 +0000 | [diff] [blame] | 1361 | ops = rcu_dereference(inet_offloads[proto]); |
Vlad Yasevich | f191a1d | 2012-11-15 08:49:23 +0000 | [diff] [blame] | 1362 | if (!ops || !ops->callbacks.gro_receive) |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1363 | goto out_unlock; |
| 1364 | |
Herbert Xu | a5ad24b | 2009-02-08 18:00:39 +0000 | [diff] [blame] | 1365 | if (*(u8 *)iph != 0x45) |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1366 | goto out_unlock; |
| 1367 | |
Steffen Klassert | 9b83e03 | 2017-04-28 10:54:32 +0200 | [diff] [blame] | 1368 | if (ip_is_fragment(iph)) |
| 1369 | goto out_unlock; |
| 1370 | |
Eric Dumazet | a9e050f | 2012-08-05 22:34:50 +0000 | [diff] [blame] | 1371 | if (unlikely(ip_fast_csum((u8 *)iph, 5))) |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1372 | goto out_unlock; |
| 1373 | |
Eric Dumazet | 0eae88f | 2010-04-20 19:06:52 -0700 | [diff] [blame] | 1374 | id = ntohl(*(__be32 *)&iph->id); |
Eric Dumazet | db8caf3 | 2013-05-31 11:18:10 +0000 | [diff] [blame] | 1375 | flush = (u16)((ntohl(*(__be32 *)iph) ^ skb_gro_len(skb)) | (id & ~IP_DF)); |
Herbert Xu | 1075f3f | 2009-05-26 18:50:29 +0000 | [diff] [blame] | 1376 | id >>= 16; |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1377 | |
| 1378 | for (p = *head; p; p = p->next) { |
| 1379 | struct iphdr *iph2; |
Alexander Duyck | 1530545 | 2016-04-10 21:44:57 -0400 | [diff] [blame] | 1380 | u16 flush_id; |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1381 | |
| 1382 | if (!NAPI_GRO_CB(p)->same_flow) |
| 1383 | continue; |
| 1384 | |
Jerry Chu | 299603e8 | 2013-12-11 20:53:45 -0800 | [diff] [blame] | 1385 | iph2 = (struct iphdr *)(p->data + off); |
| 1386 | /* The above works because, with the exception of the top |
| 1387 | * (inner most) layer, we only aggregate pkts with the same |
| 1388 | * hdr length so all the hdrs we'll need to verify will start |
| 1389 | * at the same offset. |
| 1390 | */ |
Herbert Xu | a5ad24b | 2009-02-08 18:00:39 +0000 | [diff] [blame] | 1391 | if ((iph->protocol ^ iph2->protocol) | |
Eric Dumazet | 0eae88f | 2010-04-20 19:06:52 -0700 | [diff] [blame] | 1392 | ((__force u32)iph->saddr ^ (__force u32)iph2->saddr) | |
| 1393 | ((__force u32)iph->daddr ^ (__force u32)iph2->daddr)) { |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1394 | NAPI_GRO_CB(p)->same_flow = 0; |
| 1395 | continue; |
| 1396 | } |
| 1397 | |
| 1398 | /* All fields must match except length and checksum. */ |
| 1399 | NAPI_GRO_CB(p)->flush |= |
Herbert Xu | a5ad24b | 2009-02-08 18:00:39 +0000 | [diff] [blame] | 1400 | (iph->ttl ^ iph2->ttl) | |
Eric Dumazet | a9e050f | 2012-08-05 22:34:50 +0000 | [diff] [blame] | 1401 | (iph->tos ^ iph2->tos) | |
Jerry Chu | bf5a755 | 2014-01-07 10:23:19 -0800 | [diff] [blame] | 1402 | ((iph->frag_off ^ iph2->frag_off) & htons(IP_DF)); |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1403 | |
| 1404 | NAPI_GRO_CB(p)->flush |= flush; |
Alexander Duyck | 1530545 | 2016-04-10 21:44:57 -0400 | [diff] [blame] | 1405 | |
| 1406 | /* We need to store of the IP ID check to be included later |
| 1407 | * when we can verify that this packet does in fact belong |
| 1408 | * to a given flow. |
| 1409 | */ |
| 1410 | flush_id = (u16)(id - ntohs(iph2->id)); |
| 1411 | |
| 1412 | /* This bit of code makes it much easier for us to identify |
| 1413 | * the cases where we are doing atomic vs non-atomic IP ID |
| 1414 | * checks. Specifically an atomic check can return IP ID |
| 1415 | * values 0 - 0xFFFF, while a non-atomic check can only |
| 1416 | * return 0 or 0xFFFF. |
| 1417 | */ |
| 1418 | if (!NAPI_GRO_CB(p)->is_atomic || |
| 1419 | !(iph->frag_off & htons(IP_DF))) { |
| 1420 | flush_id ^= NAPI_GRO_CB(p)->count; |
| 1421 | flush_id = flush_id ? 0xFFFF : 0; |
| 1422 | } |
| 1423 | |
| 1424 | /* If the previous IP ID value was based on an atomic |
| 1425 | * datagram we can overwrite the value and ignore it. |
| 1426 | */ |
| 1427 | if (NAPI_GRO_CB(skb)->is_atomic) |
| 1428 | NAPI_GRO_CB(p)->flush_id = flush_id; |
| 1429 | else |
| 1430 | NAPI_GRO_CB(p)->flush_id |= flush_id; |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1431 | } |
| 1432 | |
Alexander Duyck | 1530545 | 2016-04-10 21:44:57 -0400 | [diff] [blame] | 1433 | NAPI_GRO_CB(skb)->is_atomic = !!(iph->frag_off & htons(IP_DF)); |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1434 | NAPI_GRO_CB(skb)->flush |= flush; |
Jerry Chu | 299603e8 | 2013-12-11 20:53:45 -0800 | [diff] [blame] | 1435 | skb_set_network_header(skb, off); |
| 1436 | /* The above will be needed by the transport layer if there is one |
| 1437 | * immediately following this IP hdr. |
| 1438 | */ |
| 1439 | |
Eric Dumazet | 2c804d0 | 2014-09-30 22:12:05 -0700 | [diff] [blame] | 1440 | /* Note : No need to call skb_gro_postpull_rcsum() here, |
| 1441 | * as we already checked checksum over ipv4 header was 0 |
| 1442 | */ |
Herbert Xu | 8691173 | 2009-01-29 14:19:50 +0000 | [diff] [blame] | 1443 | skb_gro_pull(skb, sizeof(*iph)); |
| 1444 | skb_set_transport_header(skb, skb_gro_offset(skb)); |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1445 | |
Sabrina Dubroca | fcd91dd | 2016-10-20 15:58:02 +0200 | [diff] [blame] | 1446 | pp = call_gro_receive(ops->callbacks.gro_receive, head, skb); |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1447 | |
| 1448 | out_unlock: |
| 1449 | rcu_read_unlock(); |
| 1450 | |
| 1451 | out: |
Steffen Klassert | 5f11416 | 2017-02-15 09:39:39 +0100 | [diff] [blame] | 1452 | skb_gro_flush_final(skb, pp, flush); |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1453 | |
| 1454 | return pp; |
| 1455 | } |
Tom Herbert | b8921ca | 2016-05-18 09:06:23 -0700 | [diff] [blame] | 1456 | EXPORT_SYMBOL(inet_gro_receive); |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1457 | |
Jesse Gross | fac8e0f | 2016-03-19 09:32:01 -0700 | [diff] [blame] | 1458 | static struct sk_buff **ipip_gro_receive(struct sk_buff **head, |
| 1459 | struct sk_buff *skb) |
| 1460 | { |
| 1461 | if (NAPI_GRO_CB(skb)->encap_mark) { |
| 1462 | NAPI_GRO_CB(skb)->flush = 1; |
| 1463 | return NULL; |
| 1464 | } |
| 1465 | |
| 1466 | NAPI_GRO_CB(skb)->encap_mark = 1; |
| 1467 | |
| 1468 | return inet_gro_receive(head, skb); |
| 1469 | } |
| 1470 | |
Deepa Dinamani | 822c868 | 2016-02-27 00:32:15 -0800 | [diff] [blame] | 1471 | #define SECONDS_PER_DAY 86400 |
| 1472 | |
| 1473 | /* inet_current_timestamp - Return IP network timestamp |
| 1474 | * |
| 1475 | * Return milliseconds since midnight in network byte order. |
| 1476 | */ |
| 1477 | __be32 inet_current_timestamp(void) |
| 1478 | { |
| 1479 | u32 secs; |
| 1480 | u32 msecs; |
| 1481 | struct timespec64 ts; |
| 1482 | |
| 1483 | ktime_get_real_ts64(&ts); |
| 1484 | |
| 1485 | /* Get secs since midnight. */ |
| 1486 | (void)div_u64_rem(ts.tv_sec, SECONDS_PER_DAY, &secs); |
| 1487 | /* Convert to msecs. */ |
| 1488 | msecs = secs * MSEC_PER_SEC; |
| 1489 | /* Convert nsec to msec. */ |
| 1490 | msecs += (u32)ts.tv_nsec / NSEC_PER_MSEC; |
| 1491 | |
| 1492 | /* Convert to network byte order. */ |
Deepa Dinamani | 3ba9d30 | 2016-03-21 18:21:26 -0700 | [diff] [blame] | 1493 | return htonl(msecs); |
Deepa Dinamani | 822c868 | 2016-02-27 00:32:15 -0800 | [diff] [blame] | 1494 | } |
| 1495 | EXPORT_SYMBOL(inet_current_timestamp); |
| 1496 | |
Willem de Bruijn | f4713a3 | 2014-11-26 14:53:02 -0500 | [diff] [blame] | 1497 | int inet_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len) |
| 1498 | { |
| 1499 | if (sk->sk_family == AF_INET) |
| 1500 | return ip_recv_error(sk, msg, len, addr_len); |
| 1501 | #if IS_ENABLED(CONFIG_IPV6) |
| 1502 | if (sk->sk_family == AF_INET6) |
| 1503 | return pingv6_ops.ipv6_recv_error(sk, msg, len, addr_len); |
| 1504 | #endif |
| 1505 | return -EINVAL; |
| 1506 | } |
| 1507 | |
Tom Herbert | b8921ca | 2016-05-18 09:06:23 -0700 | [diff] [blame] | 1508 | int inet_gro_complete(struct sk_buff *skb, int nhoff) |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1509 | { |
Jerry Chu | 299603e8 | 2013-12-11 20:53:45 -0800 | [diff] [blame] | 1510 | __be16 newlen = htons(skb->len - nhoff); |
| 1511 | struct iphdr *iph = (struct iphdr *)(skb->data + nhoff); |
Vlad Yasevich | bca49f8 | 2012-11-15 08:49:14 +0000 | [diff] [blame] | 1512 | const struct net_offload *ops; |
David S. Miller | f9242b6 | 2012-06-19 18:56:21 -0700 | [diff] [blame] | 1513 | int proto = iph->protocol; |
| 1514 | int err = -ENOSYS; |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1515 | |
Paolo Abeni | 294acf1 | 2017-03-07 18:33:31 +0100 | [diff] [blame] | 1516 | if (skb->encapsulation) { |
| 1517 | skb_set_inner_protocol(skb, cpu_to_be16(ETH_P_IP)); |
Jerry Chu | c3caf11 | 2014-07-14 15:54:46 -0700 | [diff] [blame] | 1518 | skb_set_inner_network_header(skb, nhoff); |
Paolo Abeni | 294acf1 | 2017-03-07 18:33:31 +0100 | [diff] [blame] | 1519 | } |
Jerry Chu | c3caf11 | 2014-07-14 15:54:46 -0700 | [diff] [blame] | 1520 | |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1521 | csum_replace2(&iph->check, iph->tot_len, newlen); |
| 1522 | iph->tot_len = newlen; |
| 1523 | |
| 1524 | rcu_read_lock(); |
Vlad Yasevich | bca49f8 | 2012-11-15 08:49:14 +0000 | [diff] [blame] | 1525 | ops = rcu_dereference(inet_offloads[proto]); |
Vlad Yasevich | f191a1d | 2012-11-15 08:49:23 +0000 | [diff] [blame] | 1526 | if (WARN_ON(!ops || !ops->callbacks.gro_complete)) |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1527 | goto out_unlock; |
| 1528 | |
Jerry Chu | 299603e8 | 2013-12-11 20:53:45 -0800 | [diff] [blame] | 1529 | /* Only need to add sizeof(*iph) to get to the next hdr below |
| 1530 | * because any hdr with option will have been flushed in |
| 1531 | * inet_gro_receive(). |
| 1532 | */ |
| 1533 | err = ops->callbacks.gro_complete(skb, nhoff + sizeof(*iph)); |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1534 | |
| 1535 | out_unlock: |
| 1536 | rcu_read_unlock(); |
| 1537 | |
| 1538 | return err; |
| 1539 | } |
Tom Herbert | b8921ca | 2016-05-18 09:06:23 -0700 | [diff] [blame] | 1540 | EXPORT_SYMBOL(inet_gro_complete); |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1541 | |
Jesse Gross | b8cba75 | 2016-03-19 09:32:00 -0700 | [diff] [blame] | 1542 | static int ipip_gro_complete(struct sk_buff *skb, int nhoff) |
| 1543 | { |
| 1544 | skb->encapsulation = 1; |
Tom Herbert | 7e13318 | 2016-05-18 09:06:10 -0700 | [diff] [blame] | 1545 | skb_shinfo(skb)->gso_type |= SKB_GSO_IPXIP4; |
Jesse Gross | b8cba75 | 2016-03-19 09:32:00 -0700 | [diff] [blame] | 1546 | return inet_gro_complete(skb, nhoff); |
| 1547 | } |
| 1548 | |
Denis V. Lunev | eee4fe4 | 2008-04-03 14:27:58 -0700 | [diff] [blame] | 1549 | int inet_ctl_sock_create(struct sock **sk, unsigned short family, |
Denis V. Lunev | 5677242 | 2008-04-03 14:28:30 -0700 | [diff] [blame] | 1550 | unsigned short type, unsigned char protocol, |
| 1551 | struct net *net) |
Denis V. Lunev | 3d58b5f | 2008-04-03 14:22:32 -0700 | [diff] [blame] | 1552 | { |
Denis V. Lunev | eee4fe4 | 2008-04-03 14:27:58 -0700 | [diff] [blame] | 1553 | struct socket *sock; |
Eric W. Biederman | 26abe14 | 2015-05-08 21:10:31 -0500 | [diff] [blame] | 1554 | int rc = sock_create_kern(net, family, type, protocol, &sock); |
Denis V. Lunev | 3d58b5f | 2008-04-03 14:22:32 -0700 | [diff] [blame] | 1555 | |
| 1556 | if (rc == 0) { |
Denis V. Lunev | eee4fe4 | 2008-04-03 14:27:58 -0700 | [diff] [blame] | 1557 | *sk = sock->sk; |
| 1558 | (*sk)->sk_allocation = GFP_ATOMIC; |
Denis V. Lunev | 3d58b5f | 2008-04-03 14:22:32 -0700 | [diff] [blame] | 1559 | /* |
| 1560 | * Unhash it so that IP input processing does not even see it, |
| 1561 | * we do not wish this socket to see incoming packets. |
| 1562 | */ |
Denis V. Lunev | eee4fe4 | 2008-04-03 14:27:58 -0700 | [diff] [blame] | 1563 | (*sk)->sk_prot->unhash(*sk); |
Denis V. Lunev | 3d58b5f | 2008-04-03 14:22:32 -0700 | [diff] [blame] | 1564 | } |
| 1565 | return rc; |
| 1566 | } |
Denis V. Lunev | 3d58b5f | 2008-04-03 14:22:32 -0700 | [diff] [blame] | 1567 | EXPORT_SYMBOL_GPL(inet_ctl_sock_create); |
| 1568 | |
Raghavendra K T | c4c6bc3 | 2015-08-30 11:29:41 +0530 | [diff] [blame] | 1569 | u64 snmp_get_cpu_field(void __percpu *mib, int cpu, int offt) |
| 1570 | { |
| 1571 | return *(((unsigned long *)per_cpu_ptr(mib, cpu)) + offt); |
| 1572 | } |
| 1573 | EXPORT_SYMBOL_GPL(snmp_get_cpu_field); |
| 1574 | |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 1575 | unsigned long snmp_fold_field(void __percpu *mib, int offt) |
Herbert Xu | 5e0f043 | 2007-04-24 21:53:35 -0700 | [diff] [blame] | 1576 | { |
| 1577 | unsigned long res = 0; |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 1578 | int i; |
Herbert Xu | 5e0f043 | 2007-04-24 21:53:35 -0700 | [diff] [blame] | 1579 | |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 1580 | for_each_possible_cpu(i) |
Raghavendra K T | c4c6bc3 | 2015-08-30 11:29:41 +0530 | [diff] [blame] | 1581 | res += snmp_get_cpu_field(mib, i, offt); |
Herbert Xu | 5e0f043 | 2007-04-24 21:53:35 -0700 | [diff] [blame] | 1582 | return res; |
| 1583 | } |
| 1584 | EXPORT_SYMBOL_GPL(snmp_fold_field); |
| 1585 | |
Eric Dumazet | 4ce3c18 | 2010-06-30 13:31:19 -0700 | [diff] [blame] | 1586 | #if BITS_PER_LONG==32 |
| 1587 | |
David S. Miller | 80ec192 | 2015-08-30 22:40:44 -0700 | [diff] [blame] | 1588 | u64 snmp_get_cpu_field64(void __percpu *mib, int cpu, int offt, |
Raghavendra K T | c4c6bc3 | 2015-08-30 11:29:41 +0530 | [diff] [blame] | 1589 | size_t syncp_offset) |
| 1590 | { |
| 1591 | void *bhptr; |
| 1592 | struct u64_stats_sync *syncp; |
| 1593 | u64 v; |
| 1594 | unsigned int start; |
| 1595 | |
| 1596 | bhptr = per_cpu_ptr(mib, cpu); |
| 1597 | syncp = (struct u64_stats_sync *)(bhptr + syncp_offset); |
| 1598 | do { |
| 1599 | start = u64_stats_fetch_begin_irq(syncp); |
| 1600 | v = *(((u64 *)bhptr) + offt); |
| 1601 | } while (u64_stats_fetch_retry_irq(syncp, start)); |
| 1602 | |
| 1603 | return v; |
| 1604 | } |
| 1605 | EXPORT_SYMBOL_GPL(snmp_get_cpu_field64); |
| 1606 | |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 1607 | u64 snmp_fold_field64(void __percpu *mib, int offt, size_t syncp_offset) |
Eric Dumazet | 4ce3c18 | 2010-06-30 13:31:19 -0700 | [diff] [blame] | 1608 | { |
| 1609 | u64 res = 0; |
| 1610 | int cpu; |
| 1611 | |
| 1612 | for_each_possible_cpu(cpu) { |
Madalin Bucur | d1bfc62 | 2015-08-31 15:46:07 +0300 | [diff] [blame] | 1613 | res += snmp_get_cpu_field64(mib, cpu, offt, syncp_offset); |
Eric Dumazet | 4ce3c18 | 2010-06-30 13:31:19 -0700 | [diff] [blame] | 1614 | } |
| 1615 | return res; |
| 1616 | } |
| 1617 | EXPORT_SYMBOL_GPL(snmp_fold_field64); |
| 1618 | #endif |
| 1619 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1620 | #ifdef CONFIG_IP_MULTICAST |
Alexey Dobriyan | 3261309 | 2009-09-14 12:21:47 +0000 | [diff] [blame] | 1621 | static const struct net_protocol igmp_protocol = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1622 | .handler = igmp_rcv, |
Alexey Dobriyan | b4ee07d | 2008-12-25 16:42:23 -0800 | [diff] [blame] | 1623 | .netns_ok = 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1624 | }; |
| 1625 | #endif |
| 1626 | |
David Ahern | a8e3bb3 | 2017-08-28 15:14:20 -0700 | [diff] [blame] | 1627 | /* thinking of making this const? Don't. |
| 1628 | * early_demux can change based on sysctl. |
| 1629 | */ |
David Ahern | 0315793 | 2017-08-28 13:23:09 -0700 | [diff] [blame] | 1630 | static struct net_protocol tcp_protocol = { |
David S. Miller | 41063e9 | 2012-06-19 21:22:05 -0700 | [diff] [blame] | 1631 | .early_demux = tcp_v4_early_demux, |
subashab@codeaurora.org | dddb64b | 2017-03-23 13:34:16 -0600 | [diff] [blame] | 1632 | .early_demux_handler = tcp_v4_early_demux, |
David S. Miller | 41063e9 | 2012-06-19 21:22:05 -0700 | [diff] [blame] | 1633 | .handler = tcp_v4_rcv, |
| 1634 | .err_handler = tcp_v4_err, |
David S. Miller | 41063e9 | 2012-06-19 21:22:05 -0700 | [diff] [blame] | 1635 | .no_policy = 1, |
| 1636 | .netns_ok = 1, |
Hannes Frederic Sowa | 8ed1dc4 | 2014-01-09 10:01:17 +0100 | [diff] [blame] | 1637 | .icmp_strict_tag_validation = 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1638 | }; |
| 1639 | |
David Ahern | a8e3bb3 | 2017-08-28 15:14:20 -0700 | [diff] [blame] | 1640 | /* thinking of making this const? Don't. |
| 1641 | * early_demux can change based on sysctl. |
| 1642 | */ |
David Ahern | 0315793 | 2017-08-28 13:23:09 -0700 | [diff] [blame] | 1643 | static struct net_protocol udp_protocol = { |
Shawn Bohrer | 421b388 | 2013-10-07 11:01:39 -0500 | [diff] [blame] | 1644 | .early_demux = udp_v4_early_demux, |
subashab@codeaurora.org | dddb64b | 2017-03-23 13:34:16 -0600 | [diff] [blame] | 1645 | .early_demux_handler = udp_v4_early_demux, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1646 | .handler = udp_rcv, |
| 1647 | .err_handler = udp_err, |
| 1648 | .no_policy = 1, |
Denis V. Lunev | 92f1fec | 2008-03-24 15:34:06 -0700 | [diff] [blame] | 1649 | .netns_ok = 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1650 | }; |
| 1651 | |
Alexey Dobriyan | 3261309 | 2009-09-14 12:21:47 +0000 | [diff] [blame] | 1652 | static const struct net_protocol icmp_protocol = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1653 | .handler = icmp_rcv, |
Li Wei | 5b05204 | 2013-02-21 22:18:44 +0000 | [diff] [blame] | 1654 | .err_handler = icmp_err, |
Herbert Xu | 8b7817f | 2007-12-12 10:44:43 -0800 | [diff] [blame] | 1655 | .no_policy = 1, |
Denis V. Lunev | 92f1fec | 2008-03-24 15:34:06 -0700 | [diff] [blame] | 1656 | .netns_ok = 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1657 | }; |
| 1658 | |
Pavel Emelyanov | 9b4661b | 2008-07-18 04:01:44 -0700 | [diff] [blame] | 1659 | static __net_init int ipv4_mib_init_net(struct net *net) |
| 1660 | { |
John Stultz | 827da44 | 2013-10-07 15:51:58 -0700 | [diff] [blame] | 1661 | int i; |
| 1662 | |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 1663 | net->mib.tcp_statistics = alloc_percpu(struct tcp_mib); |
| 1664 | if (!net->mib.tcp_statistics) |
Pavel Emelyanov | 57ef42d | 2008-07-18 04:02:08 -0700 | [diff] [blame] | 1665 | goto err_tcp_mib; |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 1666 | net->mib.ip_statistics = alloc_percpu(struct ipstats_mib); |
| 1667 | if (!net->mib.ip_statistics) |
Pavel Emelyanov | a20f579 | 2008-07-18 04:02:42 -0700 | [diff] [blame] | 1668 | goto err_ip_mib; |
John Stultz | 827da44 | 2013-10-07 15:51:58 -0700 | [diff] [blame] | 1669 | |
| 1670 | for_each_possible_cpu(i) { |
| 1671 | struct ipstats_mib *af_inet_stats; |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 1672 | af_inet_stats = per_cpu_ptr(net->mib.ip_statistics, i); |
John Stultz | 827da44 | 2013-10-07 15:51:58 -0700 | [diff] [blame] | 1673 | u64_stats_init(&af_inet_stats->syncp); |
John Stultz | 827da44 | 2013-10-07 15:51:58 -0700 | [diff] [blame] | 1674 | } |
| 1675 | |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 1676 | net->mib.net_statistics = alloc_percpu(struct linux_mib); |
| 1677 | if (!net->mib.net_statistics) |
Pavel Emelyanov | 61a7e26 | 2008-07-18 04:03:08 -0700 | [diff] [blame] | 1678 | goto err_net_mib; |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 1679 | net->mib.udp_statistics = alloc_percpu(struct udp_mib); |
| 1680 | if (!net->mib.udp_statistics) |
Pavel Emelyanov | 2f275f9 | 2008-07-18 04:03:27 -0700 | [diff] [blame] | 1681 | goto err_udp_mib; |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 1682 | net->mib.udplite_statistics = alloc_percpu(struct udp_mib); |
| 1683 | if (!net->mib.udplite_statistics) |
Pavel Emelyanov | 386019d | 2008-07-18 04:03:45 -0700 | [diff] [blame] | 1684 | goto err_udplite_mib; |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 1685 | net->mib.icmp_statistics = alloc_percpu(struct icmp_mib); |
| 1686 | if (!net->mib.icmp_statistics) |
Pavel Emelyanov | b60538a | 2008-07-18 04:04:02 -0700 | [diff] [blame] | 1687 | goto err_icmp_mib; |
Eric Dumazet | acb32ba | 2011-11-08 13:04:43 +0000 | [diff] [blame] | 1688 | net->mib.icmpmsg_statistics = kzalloc(sizeof(struct icmpmsg_mib), |
| 1689 | GFP_KERNEL); |
| 1690 | if (!net->mib.icmpmsg_statistics) |
Pavel Emelyanov | 923c658 | 2008-07-18 04:04:22 -0700 | [diff] [blame] | 1691 | goto err_icmpmsg_mib; |
Pavel Emelyanov | 57ef42d | 2008-07-18 04:02:08 -0700 | [diff] [blame] | 1692 | |
| 1693 | tcp_mib_init(net); |
Pavel Emelyanov | 9b4661b | 2008-07-18 04:01:44 -0700 | [diff] [blame] | 1694 | return 0; |
Pavel Emelyanov | 57ef42d | 2008-07-18 04:02:08 -0700 | [diff] [blame] | 1695 | |
Pavel Emelyanov | 923c658 | 2008-07-18 04:04:22 -0700 | [diff] [blame] | 1696 | err_icmpmsg_mib: |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 1697 | free_percpu(net->mib.icmp_statistics); |
Pavel Emelyanov | b60538a | 2008-07-18 04:04:02 -0700 | [diff] [blame] | 1698 | err_icmp_mib: |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 1699 | free_percpu(net->mib.udplite_statistics); |
Pavel Emelyanov | 386019d | 2008-07-18 04:03:45 -0700 | [diff] [blame] | 1700 | err_udplite_mib: |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 1701 | free_percpu(net->mib.udp_statistics); |
Pavel Emelyanov | 2f275f9 | 2008-07-18 04:03:27 -0700 | [diff] [blame] | 1702 | err_udp_mib: |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 1703 | free_percpu(net->mib.net_statistics); |
Pavel Emelyanov | 61a7e26 | 2008-07-18 04:03:08 -0700 | [diff] [blame] | 1704 | err_net_mib: |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 1705 | free_percpu(net->mib.ip_statistics); |
Pavel Emelyanov | a20f579 | 2008-07-18 04:02:42 -0700 | [diff] [blame] | 1706 | err_ip_mib: |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 1707 | free_percpu(net->mib.tcp_statistics); |
Pavel Emelyanov | 57ef42d | 2008-07-18 04:02:08 -0700 | [diff] [blame] | 1708 | err_tcp_mib: |
| 1709 | return -ENOMEM; |
Pavel Emelyanov | 9b4661b | 2008-07-18 04:01:44 -0700 | [diff] [blame] | 1710 | } |
| 1711 | |
| 1712 | static __net_exit void ipv4_mib_exit_net(struct net *net) |
| 1713 | { |
Eric Dumazet | acb32ba | 2011-11-08 13:04:43 +0000 | [diff] [blame] | 1714 | kfree(net->mib.icmpmsg_statistics); |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 1715 | free_percpu(net->mib.icmp_statistics); |
| 1716 | free_percpu(net->mib.udplite_statistics); |
| 1717 | free_percpu(net->mib.udp_statistics); |
| 1718 | free_percpu(net->mib.net_statistics); |
| 1719 | free_percpu(net->mib.ip_statistics); |
| 1720 | free_percpu(net->mib.tcp_statistics); |
Pavel Emelyanov | 9b4661b | 2008-07-18 04:01:44 -0700 | [diff] [blame] | 1721 | } |
| 1722 | |
| 1723 | static __net_initdata struct pernet_operations ipv4_mib_ops = { |
| 1724 | .init = ipv4_mib_init_net, |
| 1725 | .exit = ipv4_mib_exit_net, |
| 1726 | }; |
| 1727 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1728 | static int __init init_ipv4_mibs(void) |
| 1729 | { |
Pavel Emelyanov | d89cbbb | 2008-07-18 04:04:51 -0700 | [diff] [blame] | 1730 | return register_pernet_subsys(&ipv4_mib_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1731 | } |
| 1732 | |
Cong Wang | c9d8f1a | 2014-05-06 11:02:49 -0700 | [diff] [blame] | 1733 | static __net_init int inet_init_net(struct net *net) |
| 1734 | { |
| 1735 | /* |
| 1736 | * Set defaults for local port range |
| 1737 | */ |
| 1738 | seqlock_init(&net->ipv4.ip_local_ports.lock); |
| 1739 | net->ipv4.ip_local_ports.range[0] = 32768; |
Eric Dumazet | 07f4c90 | 2015-05-24 14:49:35 -0700 | [diff] [blame] | 1740 | net->ipv4.ip_local_ports.range[1] = 60999; |
Cong Wang | ba6b918 | 2014-05-06 11:02:50 -0700 | [diff] [blame] | 1741 | |
| 1742 | seqlock_init(&net->ipv4.ping_group_range.lock); |
| 1743 | /* |
| 1744 | * Sane defaults - nobody may create ping sockets. |
| 1745 | * Boot scripts should set this to distro-specific group. |
| 1746 | */ |
| 1747 | net->ipv4.ping_group_range.range[0] = make_kgid(&init_user_ns, 1); |
| 1748 | net->ipv4.ping_group_range.range[1] = make_kgid(&init_user_ns, 0); |
Ezequiel Garcia | 049bbf5 | 2016-05-20 13:21:10 -0300 | [diff] [blame] | 1749 | |
| 1750 | /* Default values for sysctl-controlled parameters. |
| 1751 | * We set them here, in case sysctl is not compiled. |
| 1752 | */ |
| 1753 | net->ipv4.sysctl_ip_default_ttl = IPDEFTTL; |
| 1754 | net->ipv4.sysctl_ip_dynaddr = 0; |
| 1755 | net->ipv4.sysctl_ip_early_demux = 1; |
subashab@codeaurora.org | dddb64b | 2017-03-23 13:34:16 -0600 | [diff] [blame] | 1756 | net->ipv4.sysctl_udp_early_demux = 1; |
| 1757 | net->ipv4.sysctl_tcp_early_demux = 1; |
Krister Johansen | 4548b68 | 2017-01-20 17:49:11 -0800 | [diff] [blame] | 1758 | #ifdef CONFIG_SYSCTL |
| 1759 | net->ipv4.sysctl_ip_prot_sock = PROT_SOCK; |
| 1760 | #endif |
Ezequiel Garcia | 049bbf5 | 2016-05-20 13:21:10 -0300 | [diff] [blame] | 1761 | |
Nikolay Borisov | 1714020 | 2017-08-09 14:38:04 +0300 | [diff] [blame] | 1762 | /* Some igmp sysctl, whose values are always used */ |
| 1763 | net->ipv4.sysctl_igmp_max_memberships = 20; |
| 1764 | net->ipv4.sysctl_igmp_max_msf = 10; |
| 1765 | /* IGMP reports for link-local multicast groups are enabled by default */ |
| 1766 | net->ipv4.sysctl_igmp_llm_reports = 1; |
| 1767 | net->ipv4.sysctl_igmp_qrv = 2; |
| 1768 | |
Cong Wang | c9d8f1a | 2014-05-06 11:02:49 -0700 | [diff] [blame] | 1769 | return 0; |
| 1770 | } |
| 1771 | |
| 1772 | static __net_exit void inet_exit_net(struct net *net) |
| 1773 | { |
| 1774 | } |
| 1775 | |
| 1776 | static __net_initdata struct pernet_operations af_inet_ops = { |
| 1777 | .init = inet_init_net, |
| 1778 | .exit = inet_exit_net, |
| 1779 | }; |
| 1780 | |
| 1781 | static int __init init_inet_pernet_ops(void) |
| 1782 | { |
| 1783 | return register_pernet_subsys(&af_inet_ops); |
| 1784 | } |
| 1785 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1786 | static int ipv4_proc_init(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1787 | |
Herbert Xu | 30e224d | 2005-07-05 14:40:10 -0700 | [diff] [blame] | 1788 | /* |
| 1789 | * IP protocol layer initialiser |
| 1790 | */ |
| 1791 | |
Vlad Yasevich | 22061d8 | 2012-11-15 08:49:11 +0000 | [diff] [blame] | 1792 | static struct packet_offload ip_packet_offload __read_mostly = { |
| 1793 | .type = cpu_to_be16(ETH_P_IP), |
Vlad Yasevich | f191a1d | 2012-11-15 08:49:23 +0000 | [diff] [blame] | 1794 | .callbacks = { |
Vlad Yasevich | f191a1d | 2012-11-15 08:49:23 +0000 | [diff] [blame] | 1795 | .gso_segment = inet_gso_segment, |
| 1796 | .gro_receive = inet_gro_receive, |
| 1797 | .gro_complete = inet_gro_complete, |
| 1798 | }, |
Herbert Xu | 30e224d | 2005-07-05 14:40:10 -0700 | [diff] [blame] | 1799 | }; |
| 1800 | |
Eric Dumazet | cb32f51 | 2013-10-19 11:42:57 -0700 | [diff] [blame] | 1801 | static const struct net_offload ipip_offload = { |
| 1802 | .callbacks = { |
Eric Dumazet | cb32f51 | 2013-10-19 11:42:57 -0700 | [diff] [blame] | 1803 | .gso_segment = inet_gso_segment, |
Jesse Gross | fac8e0f | 2016-03-19 09:32:01 -0700 | [diff] [blame] | 1804 | .gro_receive = ipip_gro_receive, |
Jesse Gross | b8cba75 | 2016-03-19 09:32:00 -0700 | [diff] [blame] | 1805 | .gro_complete = ipip_gro_complete, |
Eric Dumazet | cb32f51 | 2013-10-19 11:42:57 -0700 | [diff] [blame] | 1806 | }, |
| 1807 | }; |
| 1808 | |
Tonghao Zhang | 93b1b31 | 2017-08-02 09:34:15 -0700 | [diff] [blame] | 1809 | static int __init ipip_offload_init(void) |
| 1810 | { |
| 1811 | return inet_add_offload(&ipip_offload, IPPROTO_IPIP); |
| 1812 | } |
| 1813 | |
Vlad Yasevich | 808a8f8 | 2012-11-15 08:49:21 +0000 | [diff] [blame] | 1814 | static int __init ipv4_offload_init(void) |
| 1815 | { |
| 1816 | /* |
| 1817 | * Add offloads |
| 1818 | */ |
Daniel Borkmann | da5bab0 | 2013-06-08 12:56:03 +0200 | [diff] [blame] | 1819 | if (udpv4_offload_init() < 0) |
Vlad Yasevich | 808a8f8 | 2012-11-15 08:49:21 +0000 | [diff] [blame] | 1820 | pr_crit("%s: Cannot add UDP protocol offload\n", __func__); |
Daniel Borkmann | 28850dc | 2013-06-07 05:11:46 +0000 | [diff] [blame] | 1821 | if (tcpv4_offload_init() < 0) |
| 1822 | pr_crit("%s: Cannot add TCP protocol offload\n", __func__); |
Tonghao Zhang | 93b1b31 | 2017-08-02 09:34:15 -0700 | [diff] [blame] | 1823 | if (ipip_offload_init() < 0) |
| 1824 | pr_crit("%s: Cannot add IPIP protocol offload\n", __func__); |
Vlad Yasevich | 808a8f8 | 2012-11-15 08:49:21 +0000 | [diff] [blame] | 1825 | |
| 1826 | dev_add_offload(&ip_packet_offload); |
| 1827 | return 0; |
| 1828 | } |
| 1829 | |
| 1830 | fs_initcall(ipv4_offload_init); |
| 1831 | |
| 1832 | static struct packet_type ip_packet_type __read_mostly = { |
| 1833 | .type = cpu_to_be16(ETH_P_IP), |
| 1834 | .func = ip_rcv, |
| 1835 | }; |
| 1836 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1837 | static int __init inet_init(void) |
| 1838 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1839 | struct inet_protosw *q; |
| 1840 | struct list_head *r; |
| 1841 | int rc = -EINVAL; |
| 1842 | |
Eyal Birger | b4772ef | 2015-03-01 14:58:29 +0200 | [diff] [blame] | 1843 | sock_skb_cb_check_size(sizeof(struct inet_skb_parm)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1844 | |
| 1845 | rc = proto_register(&tcp_prot, 1); |
| 1846 | if (rc) |
WANG Cong | 122ff24 | 2014-05-12 16:04:53 -0700 | [diff] [blame] | 1847 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1848 | |
| 1849 | rc = proto_register(&udp_prot, 1); |
| 1850 | if (rc) |
| 1851 | goto out_unregister_tcp_proto; |
| 1852 | |
| 1853 | rc = proto_register(&raw_prot, 1); |
| 1854 | if (rc) |
| 1855 | goto out_unregister_udp_proto; |
| 1856 | |
Vasiliy Kulikov | c319b4d | 2011-05-13 10:01:00 +0000 | [diff] [blame] | 1857 | rc = proto_register(&ping_prot, 1); |
| 1858 | if (rc) |
| 1859 | goto out_unregister_raw_proto; |
| 1860 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1861 | /* |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1862 | * Tell SOCKET that we are alive... |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1863 | */ |
| 1864 | |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1865 | (void)sock_register(&inet_family_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1866 | |
Al Viro | bd7b153 | 2008-07-15 16:00:59 -0400 | [diff] [blame] | 1867 | #ifdef CONFIG_SYSCTL |
| 1868 | ip_static_sysctl_init(); |
| 1869 | #endif |
| 1870 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1871 | /* |
| 1872 | * Add all the base protocols. |
| 1873 | */ |
| 1874 | |
| 1875 | if (inet_add_protocol(&icmp_protocol, IPPROTO_ICMP) < 0) |
Joe Perches | 058bd4d | 2012-03-11 18:36:11 +0000 | [diff] [blame] | 1876 | pr_crit("%s: Cannot add ICMP protocol\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1877 | if (inet_add_protocol(&udp_protocol, IPPROTO_UDP) < 0) |
Joe Perches | 058bd4d | 2012-03-11 18:36:11 +0000 | [diff] [blame] | 1878 | pr_crit("%s: Cannot add UDP protocol\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1879 | if (inet_add_protocol(&tcp_protocol, IPPROTO_TCP) < 0) |
Joe Perches | 058bd4d | 2012-03-11 18:36:11 +0000 | [diff] [blame] | 1880 | pr_crit("%s: Cannot add TCP protocol\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1881 | #ifdef CONFIG_IP_MULTICAST |
| 1882 | if (inet_add_protocol(&igmp_protocol, IPPROTO_IGMP) < 0) |
Joe Perches | 058bd4d | 2012-03-11 18:36:11 +0000 | [diff] [blame] | 1883 | pr_crit("%s: Cannot add IGMP protocol\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1884 | #endif |
| 1885 | |
| 1886 | /* Register the socket-side information for inet_create. */ |
| 1887 | for (r = &inetsw[0]; r < &inetsw[SOCK_MAX]; ++r) |
| 1888 | INIT_LIST_HEAD(r); |
| 1889 | |
| 1890 | for (q = inetsw_array; q < &inetsw_array[INETSW_ARRAY_LEN]; ++q) |
| 1891 | inet_register_protosw(q); |
| 1892 | |
| 1893 | /* |
| 1894 | * Set the ARP module up |
| 1895 | */ |
| 1896 | |
| 1897 | arp_init(); |
| 1898 | |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1899 | /* |
| 1900 | * Set the IP module up |
| 1901 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1902 | |
| 1903 | ip_init(); |
| 1904 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1905 | /* Setup TCP slab cache for open requests. */ |
| 1906 | tcp_init(); |
| 1907 | |
Hideo Aoki | 95766ff | 2007-12-31 00:29:24 -0800 | [diff] [blame] | 1908 | /* Setup UDP memory threshold */ |
| 1909 | udp_init(); |
| 1910 | |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 1911 | /* Add UDP-Lite (RFC 3828) */ |
| 1912 | udplite4_register(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1913 | |
Vasiliy Kulikov | c319b4d | 2011-05-13 10:01:00 +0000 | [diff] [blame] | 1914 | ping_init(); |
| 1915 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1916 | /* |
| 1917 | * Set the ICMP layer up |
| 1918 | */ |
| 1919 | |
Denis V. Lunev | a5710d6 | 2008-02-29 11:14:50 -0800 | [diff] [blame] | 1920 | if (icmp_init() < 0) |
| 1921 | panic("Failed to create the ICMP control socket.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1922 | |
| 1923 | /* |
| 1924 | * Initialise the multicast router |
| 1925 | */ |
| 1926 | #if defined(CONFIG_IP_MROUTE) |
Wang Chen | 03d2f89 | 2008-07-03 12:13:36 +0800 | [diff] [blame] | 1927 | if (ip_mr_init()) |
Joe Perches | 058bd4d | 2012-03-11 18:36:11 +0000 | [diff] [blame] | 1928 | pr_crit("%s: Cannot init ipv4 mroute\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1929 | #endif |
Cong Wang | c9d8f1a | 2014-05-06 11:02:49 -0700 | [diff] [blame] | 1930 | |
| 1931 | if (init_inet_pernet_ops()) |
| 1932 | pr_crit("%s: Cannot init ipv4 inet pernet ops\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1933 | /* |
| 1934 | * Initialise per-cpu ipv4 mibs |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1935 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1936 | |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1937 | if (init_ipv4_mibs()) |
Joe Perches | 058bd4d | 2012-03-11 18:36:11 +0000 | [diff] [blame] | 1938 | pr_crit("%s: Cannot init ipv4 mibs\n", __func__); |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1939 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1940 | ipv4_proc_init(); |
| 1941 | |
| 1942 | ipfrag_init(); |
| 1943 | |
Herbert Xu | 30e224d | 2005-07-05 14:40:10 -0700 | [diff] [blame] | 1944 | dev_add_pack(&ip_packet_type); |
| 1945 | |
Thomas Graf | 045a0fa | 2015-07-23 10:08:44 +0200 | [diff] [blame] | 1946 | ip_tunnel_core_init(); |
| 1947 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1948 | rc = 0; |
| 1949 | out: |
| 1950 | return rc; |
Vasiliy Kulikov | c319b4d | 2011-05-13 10:01:00 +0000 | [diff] [blame] | 1951 | out_unregister_raw_proto: |
| 1952 | proto_unregister(&raw_prot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1953 | out_unregister_udp_proto: |
| 1954 | proto_unregister(&udp_prot); |
Olaf Kirch | 321efff | 2006-09-27 16:33:45 -0700 | [diff] [blame] | 1955 | out_unregister_tcp_proto: |
| 1956 | proto_unregister(&tcp_prot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1957 | goto out; |
| 1958 | } |
| 1959 | |
Heiko Carstens | a536e07 | 2006-04-28 15:19:17 -0700 | [diff] [blame] | 1960 | fs_initcall(inet_init); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1961 | |
| 1962 | /* ------------------------------------------------------------------------ */ |
| 1963 | |
| 1964 | #ifdef CONFIG_PROC_FS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1965 | static int __init ipv4_proc_init(void) |
| 1966 | { |
| 1967 | int rc = 0; |
| 1968 | |
| 1969 | if (raw_proc_init()) |
| 1970 | goto out_raw; |
| 1971 | if (tcp4_proc_init()) |
| 1972 | goto out_tcp; |
| 1973 | if (udp4_proc_init()) |
| 1974 | goto out_udp; |
Vasiliy Kulikov | c319b4d | 2011-05-13 10:01:00 +0000 | [diff] [blame] | 1975 | if (ping_proc_init()) |
| 1976 | goto out_ping; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1977 | if (ip_misc_proc_init()) |
| 1978 | goto out_misc; |
| 1979 | out: |
| 1980 | return rc; |
| 1981 | out_misc: |
Vasiliy Kulikov | c319b4d | 2011-05-13 10:01:00 +0000 | [diff] [blame] | 1982 | ping_proc_exit(); |
| 1983 | out_ping: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1984 | udp4_proc_exit(); |
| 1985 | out_udp: |
| 1986 | tcp4_proc_exit(); |
| 1987 | out_tcp: |
| 1988 | raw_proc_exit(); |
| 1989 | out_raw: |
| 1990 | rc = -ENOMEM; |
| 1991 | goto out; |
| 1992 | } |
| 1993 | |
| 1994 | #else /* CONFIG_PROC_FS */ |
| 1995 | static int __init ipv4_proc_init(void) |
| 1996 | { |
| 1997 | return 0; |
| 1998 | } |
| 1999 | #endif /* CONFIG_PROC_FS */ |