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> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | |
Linus Torvalds | 7c0f6ba | 2016-12-24 11:46:01 -0800 | [diff] [blame] | 93 | #include <linux/uaccess.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | #include <linux/inet.h> |
| 96 | #include <linux/igmp.h> |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 97 | #include <linux/inetdevice.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | #include <linux/netdevice.h> |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 99 | #include <net/checksum.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | #include <net/ip.h> |
| 101 | #include <net/protocol.h> |
| 102 | #include <net/arp.h> |
| 103 | #include <net/route.h> |
| 104 | #include <net/ip_fib.h> |
Arnaldo Carvalho de Melo | 295f732 | 2005-08-09 20:11:56 -0700 | [diff] [blame] | 105 | #include <net/inet_connection_sock.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | #include <net/tcp.h> |
| 107 | #include <net/udp.h> |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 108 | #include <net/udplite.h> |
Vasiliy Kulikov | c319b4d | 2011-05-13 10:01:00 +0000 | [diff] [blame] | 109 | #include <net/ping.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | #include <linux/skbuff.h> |
| 111 | #include <net/sock.h> |
| 112 | #include <net/raw.h> |
| 113 | #include <net/icmp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | #include <net/inet_common.h> |
Thomas Graf | 045a0fa | 2015-07-23 10:08:44 +0200 | [diff] [blame] | 115 | #include <net/ip_tunnels.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | #include <net/xfrm.h> |
Pavel Emelyanov | 9b4661b | 2008-07-18 04:01:44 -0700 | [diff] [blame] | 117 | #include <net/net_namespace.h> |
Eric Dumazet | aebda15 | 2013-04-29 05:58:52 +0000 | [diff] [blame] | 118 | #include <net/secure_seq.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | #ifdef CONFIG_IP_MROUTE |
| 120 | #include <linux/mroute.h> |
| 121 | #endif |
David Ahern | 3236b00 | 2015-09-29 20:07:14 -0700 | [diff] [blame] | 122 | #include <net/l3mdev.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | |
| 125 | /* The inetsw table contains everything that inet_create needs to |
| 126 | * build a new socket. |
| 127 | */ |
| 128 | static struct list_head inetsw[SOCK_MAX]; |
| 129 | static DEFINE_SPINLOCK(inetsw_lock); |
| 130 | |
| 131 | /* New destruction routine */ |
| 132 | |
| 133 | void inet_sock_destruct(struct sock *sk) |
| 134 | { |
| 135 | struct inet_sock *inet = inet_sk(sk); |
| 136 | |
| 137 | __skb_queue_purge(&sk->sk_receive_queue); |
| 138 | __skb_queue_purge(&sk->sk_error_queue); |
| 139 | |
Hideo Aoki | 95766ff | 2007-12-31 00:29:24 -0800 | [diff] [blame] | 140 | sk_mem_reclaim(sk); |
| 141 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | if (sk->sk_type == SOCK_STREAM && sk->sk_state != TCP_CLOSE) { |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 143 | pr_err("Attempt to release TCP socket in state %d %p\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | sk->sk_state, sk); |
| 145 | return; |
| 146 | } |
| 147 | if (!sock_flag(sk, SOCK_DEAD)) { |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 148 | pr_err("Attempt to release alive inet socket %p\n", sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | return; |
| 150 | } |
| 151 | |
Ilpo Järvinen | 547b792 | 2008-07-25 21:43:18 -0700 | [diff] [blame] | 152 | WARN_ON(atomic_read(&sk->sk_rmem_alloc)); |
| 153 | WARN_ON(atomic_read(&sk->sk_wmem_alloc)); |
| 154 | WARN_ON(sk->sk_wmem_queued); |
| 155 | WARN_ON(sk->sk_forward_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | |
Eric Dumazet | f6d8bd0 | 2011-04-21 09:45:37 +0000 | [diff] [blame] | 157 | kfree(rcu_dereference_protected(inet->inet_opt, 1)); |
Eric Dumazet | b6c6712 | 2010-04-08 23:03:29 +0000 | [diff] [blame] | 158 | dst_release(rcu_dereference_check(sk->sk_dst_cache, 1)); |
David S. Miller | 41063e9 | 2012-06-19 21:22:05 -0700 | [diff] [blame] | 159 | dst_release(sk->sk_rx_dst); |
Arnaldo Carvalho de Melo | e684897 | 2005-08-09 19:45:38 -0700 | [diff] [blame] | 160 | sk_refcnt_debug_dec(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 162 | EXPORT_SYMBOL(inet_sock_destruct); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | |
| 164 | /* |
| 165 | * The routines beyond this point handle the behaviour of an AF_INET |
| 166 | * socket object. Mostly it punts to the subprotocols of IP to do |
| 167 | * the work. |
| 168 | */ |
| 169 | |
| 170 | /* |
| 171 | * Automatically bind an unbound socket. |
| 172 | */ |
| 173 | |
| 174 | static int inet_autobind(struct sock *sk) |
| 175 | { |
| 176 | struct inet_sock *inet; |
| 177 | /* We may need to bind the socket. */ |
| 178 | lock_sock(sk); |
| 179 | inet = inet_sk(sk); |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 180 | if (!inet->inet_num) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | if (sk->sk_prot->get_port(sk, 0)) { |
| 182 | release_sock(sk); |
| 183 | return -EAGAIN; |
| 184 | } |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 185 | inet->inet_sport = htons(inet->inet_num); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | } |
| 187 | release_sock(sk); |
| 188 | return 0; |
| 189 | } |
| 190 | |
| 191 | /* |
| 192 | * Move a socket into listening state. |
| 193 | */ |
| 194 | int inet_listen(struct socket *sock, int backlog) |
| 195 | { |
| 196 | struct sock *sk = sock->sk; |
| 197 | unsigned char old_state; |
| 198 | int err; |
| 199 | |
| 200 | lock_sock(sk); |
| 201 | |
| 202 | err = -EINVAL; |
| 203 | if (sock->state != SS_UNCONNECTED || sock->type != SOCK_STREAM) |
| 204 | goto out; |
| 205 | |
| 206 | old_state = sk->sk_state; |
| 207 | if (!((1 << old_state) & (TCPF_CLOSE | TCPF_LISTEN))) |
| 208 | goto out; |
| 209 | |
| 210 | /* Really, if the socket is already in listen state |
| 211 | * we can only allow the backlog to be adjusted. |
| 212 | */ |
| 213 | if (old_state != TCP_LISTEN) { |
Yuchung Cheng | cebc5cb | 2016-08-22 17:17:54 -0700 | [diff] [blame] | 214 | /* Enable TFO w/o requiring TCP_FASTOPEN socket option. |
Jerry Chu | 8336886 | 2012-08-31 12:29:12 +0000 | [diff] [blame] | 215 | * Note that only TCP sockets (SOCK_STREAM) will reach here. |
Yuchung Cheng | cebc5cb | 2016-08-22 17:17:54 -0700 | [diff] [blame] | 216 | * Also fastopen backlog may already been set via the option |
| 217 | * because the socket was in TCP_LISTEN state previously but |
| 218 | * was shutdown() rather than close(). |
Jerry Chu | 8336886 | 2012-08-31 12:29:12 +0000 | [diff] [blame] | 219 | */ |
Yuchung Cheng | cebc5cb | 2016-08-22 17:17:54 -0700 | [diff] [blame] | 220 | if ((sysctl_tcp_fastopen & TFO_SERVER_WO_SOCKOPT1) && |
| 221 | (sysctl_tcp_fastopen & TFO_SERVER_ENABLE) && |
Eric Dumazet | 0536fcc | 2015-09-29 07:42:52 -0700 | [diff] [blame] | 222 | !inet_csk(sk)->icsk_accept_queue.fastopenq.max_qlen) { |
Yuchung Cheng | cebc5cb | 2016-08-22 17:17:54 -0700 | [diff] [blame] | 223 | fastopen_queue_tune(sk, backlog); |
Christoph Paasch | dfea2aa | 2015-06-18 09:15:34 -0700 | [diff] [blame] | 224 | tcp_fastopen_init_key_once(true); |
Jerry Chu | 8336886 | 2012-08-31 12:29:12 +0000 | [diff] [blame] | 225 | } |
Yuchung Cheng | cebc5cb | 2016-08-22 17:17:54 -0700 | [diff] [blame] | 226 | |
Eric Dumazet | 72a3eff | 2006-11-16 02:30:37 -0800 | [diff] [blame] | 227 | err = inet_csk_listen_start(sk, backlog); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | if (err) |
| 229 | goto out; |
| 230 | } |
| 231 | sk->sk_max_ack_backlog = backlog; |
| 232 | err = 0; |
| 233 | |
| 234 | out: |
| 235 | release_sock(sk); |
| 236 | return err; |
| 237 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 238 | EXPORT_SYMBOL(inet_listen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | |
| 240 | /* |
| 241 | * Create an inet socket. |
| 242 | */ |
| 243 | |
Eric Paris | 3f378b6 | 2009-11-05 22:18:14 -0800 | [diff] [blame] | 244 | static int inet_create(struct net *net, struct socket *sock, int protocol, |
| 245 | int kern) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | { |
| 247 | struct sock *sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | struct inet_protosw *answer; |
| 249 | struct inet_sock *inet; |
| 250 | struct proto *answer_prot; |
| 251 | unsigned char answer_flags; |
Arnaldo Carvalho de Melo | bb97d31 | 2005-08-09 20:19:14 -0700 | [diff] [blame] | 252 | int try_loading_module = 0; |
Herbert Xu | 86c8f9d | 2005-12-02 20:43:26 -0800 | [diff] [blame] | 253 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | |
Hannes Frederic Sowa | 79462ad0 | 2015-12-14 22:03:39 +0100 | [diff] [blame] | 255 | if (protocol < 0 || protocol >= IPPROTO_MAX) |
| 256 | return -EINVAL; |
| 257 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | sock->state = SS_UNCONNECTED; |
| 259 | |
| 260 | /* Look for the requested type/protocol pair. */ |
Arnaldo Carvalho de Melo | bb97d31 | 2005-08-09 20:19:14 -0700 | [diff] [blame] | 261 | lookup_protocol: |
Herbert Xu | 86c8f9d | 2005-12-02 20:43:26 -0800 | [diff] [blame] | 262 | err = -ESOCKTNOSUPPORT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | rcu_read_lock(); |
Paul E. McKenney | 696adfe | 2008-07-25 01:45:34 -0700 | [diff] [blame] | 264 | list_for_each_entry_rcu(answer, &inetsw[sock->type], list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | |
Paul E. McKenney | 696adfe | 2008-07-25 01:45:34 -0700 | [diff] [blame] | 266 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | /* Check the non-wild match. */ |
| 268 | if (protocol == answer->protocol) { |
| 269 | if (protocol != IPPROTO_IP) |
| 270 | break; |
| 271 | } else { |
| 272 | /* Check for the two wild cases. */ |
| 273 | if (IPPROTO_IP == protocol) { |
| 274 | protocol = answer->protocol; |
| 275 | break; |
| 276 | } |
| 277 | if (IPPROTO_IP == answer->protocol) |
| 278 | break; |
| 279 | } |
Herbert Xu | 86c8f9d | 2005-12-02 20:43:26 -0800 | [diff] [blame] | 280 | err = -EPROTONOSUPPORT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | } |
| 282 | |
Paul E. McKenney | 696adfe | 2008-07-25 01:45:34 -0700 | [diff] [blame] | 283 | if (unlikely(err)) { |
Arnaldo Carvalho de Melo | bb97d31 | 2005-08-09 20:19:14 -0700 | [diff] [blame] | 284 | if (try_loading_module < 2) { |
| 285 | rcu_read_unlock(); |
| 286 | /* |
| 287 | * Be more specific, e.g. net-pf-2-proto-132-type-1 |
| 288 | * (net-pf-PF_INET-proto-IPPROTO_SCTP-type-SOCK_STREAM) |
| 289 | */ |
| 290 | if (++try_loading_module == 1) |
| 291 | request_module("net-pf-%d-proto-%d-type-%d", |
| 292 | PF_INET, protocol, sock->type); |
| 293 | /* |
| 294 | * Fall back to generic, e.g. net-pf-2-proto-132 |
| 295 | * (net-pf-PF_INET-proto-IPPROTO_SCTP) |
| 296 | */ |
| 297 | else |
| 298 | request_module("net-pf-%d-proto-%d", |
| 299 | PF_INET, protocol); |
| 300 | goto lookup_protocol; |
| 301 | } else |
| 302 | goto out_rcu_unlock; |
| 303 | } |
| 304 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | err = -EPERM; |
Eric W. Biederman | 52e804c | 2012-11-16 03:03:05 +0000 | [diff] [blame] | 306 | if (sock->type == SOCK_RAW && !kern && |
| 307 | !ns_capable(net->user_ns, CAP_NET_RAW)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | goto out_rcu_unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | |
| 310 | sock->ops = answer->ops; |
| 311 | answer_prot = answer->prot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | answer_flags = answer->flags; |
| 313 | rcu_read_unlock(); |
| 314 | |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 315 | WARN_ON(!answer_prot->slab); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | |
| 317 | err = -ENOBUFS; |
Eric W. Biederman | 11aa9c2 | 2015-05-08 21:09:13 -0500 | [diff] [blame] | 318 | sk = sk_alloc(net, PF_INET, GFP_KERNEL, answer_prot, kern); |
Ian Morris | 51456b2 | 2015-04-03 09:17:26 +0100 | [diff] [blame] | 319 | if (!sk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | goto out; |
| 321 | |
| 322 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | if (INET_PROTOSW_REUSE & answer_flags) |
Pavel Emelyanov | 4a17fd5 | 2012-04-19 03:39:36 +0000 | [diff] [blame] | 324 | sk->sk_reuse = SK_CAN_REUSE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | |
| 326 | inet = inet_sk(sk); |
Paul Moore | 469de9b | 2007-01-09 14:37:06 -0800 | [diff] [blame] | 327 | inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | |
Jiri Olsa | 7b2ff18 | 2010-06-15 01:07:31 +0000 | [diff] [blame] | 329 | inet->nodefrag = 0; |
| 330 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | if (SOCK_RAW == sock->type) { |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 332 | inet->inet_num = protocol; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | if (IPPROTO_RAW == protocol) |
| 334 | inet->hdrincl = 1; |
| 335 | } |
| 336 | |
Hannes Frederic Sowa | 974eda1 | 2013-12-14 05:13:38 +0100 | [diff] [blame] | 337 | if (net->ipv4.sysctl_ip_no_pmtu_disc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | inet->pmtudisc = IP_PMTUDISC_DONT; |
| 339 | else |
| 340 | inet->pmtudisc = IP_PMTUDISC_WANT; |
| 341 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 342 | inet->inet_id = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | |
| 344 | sock_init_data(sock, sk); |
| 345 | |
| 346 | sk->sk_destruct = inet_sock_destruct; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | sk->sk_protocol = protocol; |
| 348 | sk->sk_backlog_rcv = sk->sk_prot->backlog_rcv; |
| 349 | |
| 350 | inet->uc_ttl = -1; |
| 351 | inet->mc_loop = 1; |
| 352 | inet->mc_ttl = 1; |
Nivedita Singhvi | f771bef | 2009-05-28 07:00:46 +0000 | [diff] [blame] | 353 | inet->mc_all = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | inet->mc_index = 0; |
| 355 | inet->mc_list = NULL; |
Jiri Benc | 4c507d2 | 2012-02-09 09:35:49 +0000 | [diff] [blame] | 356 | inet->rcv_tos = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | |
Arnaldo Carvalho de Melo | e684897 | 2005-08-09 19:45:38 -0700 | [diff] [blame] | 358 | sk_refcnt_debug_inc(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 360 | if (inet->inet_num) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | /* It assumes that any protocol which allows |
| 362 | * the user to assign a number at socket |
| 363 | * creation time automatically |
| 364 | * shares. |
| 365 | */ |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 366 | inet->inet_sport = htons(inet->inet_num); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | /* Add to protocol hash chains. */ |
Craig Gallek | 086c653 | 2016-02-10 11:50:35 -0500 | [diff] [blame] | 368 | err = sk->sk_prot->hash(sk); |
| 369 | if (err) { |
| 370 | sk_common_release(sk); |
| 371 | goto out; |
| 372 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | } |
| 374 | |
| 375 | if (sk->sk_prot->init) { |
| 376 | err = sk->sk_prot->init(sk); |
David Ahern | 61023658 | 2016-12-01 08:48:04 -0800 | [diff] [blame] | 377 | if (err) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | sk_common_release(sk); |
David Ahern | 61023658 | 2016-12-01 08:48:04 -0800 | [diff] [blame] | 379 | goto out; |
| 380 | } |
| 381 | } |
| 382 | |
| 383 | if (!kern) { |
| 384 | err = BPF_CGROUP_RUN_PROG_INET_SOCK(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 | out: |
| 391 | return err; |
| 392 | out_rcu_unlock: |
| 393 | rcu_read_unlock(); |
| 394 | goto out; |
| 395 | } |
| 396 | |
| 397 | |
| 398 | /* |
| 399 | * The peer socket should always be NULL (or else). When we call this |
| 400 | * function we are destroying the object and from then on nobody |
| 401 | * should refer to it. |
| 402 | */ |
| 403 | int inet_release(struct socket *sock) |
| 404 | { |
| 405 | struct sock *sk = sock->sk; |
| 406 | |
| 407 | if (sk) { |
| 408 | long timeout; |
| 409 | |
| 410 | /* Applications forget to leave groups before exiting */ |
| 411 | ip_mc_drop_socket(sk); |
| 412 | |
| 413 | /* If linger is set, we don't return until the close |
| 414 | * is complete. Otherwise we return immediately. The |
| 415 | * actually closing is done the same either way. |
| 416 | * |
| 417 | * If the close is due to the process exiting, we never |
| 418 | * linger.. |
| 419 | */ |
| 420 | timeout = 0; |
| 421 | if (sock_flag(sk, SOCK_LINGER) && |
| 422 | !(current->flags & PF_EXITING)) |
| 423 | timeout = sk->sk_lingertime; |
| 424 | sock->sk = NULL; |
| 425 | sk->sk_prot->close(sk, timeout); |
| 426 | } |
| 427 | return 0; |
| 428 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 429 | EXPORT_SYMBOL(inet_release); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | int inet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) |
| 432 | { |
| 433 | struct sockaddr_in *addr = (struct sockaddr_in *)uaddr; |
| 434 | struct sock *sk = sock->sk; |
| 435 | struct inet_sock *inet = inet_sk(sk); |
Eric W. Biederman | 3594698 | 2012-11-16 03:03:12 +0000 | [diff] [blame] | 436 | struct net *net = sock_net(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | unsigned short snum; |
| 438 | int chk_addr_ret; |
David Ahern | 9b8ff51 | 2015-09-01 14:26:35 -0600 | [diff] [blame] | 439 | u32 tb_id = RT_TABLE_LOCAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | int err; |
| 441 | |
| 442 | /* If the socket has its own bind function then use it. (RAW) */ |
| 443 | if (sk->sk_prot->bind) { |
| 444 | err = sk->sk_prot->bind(sk, uaddr, addr_len); |
| 445 | goto out; |
| 446 | } |
| 447 | err = -EINVAL; |
| 448 | if (addr_len < sizeof(struct sockaddr_in)) |
| 449 | goto out; |
| 450 | |
Marcus Meissner | c349a52 | 2011-07-04 01:30:29 +0000 | [diff] [blame] | 451 | if (addr->sin_family != AF_INET) { |
Eric Dumazet | 29c486d | 2011-08-30 18:57:00 -0400 | [diff] [blame] | 452 | /* Compatibility games : accept AF_UNSPEC (mapped to AF_INET) |
| 453 | * only if s_addr is INADDR_ANY. |
| 454 | */ |
Marcus Meissner | c349a52 | 2011-07-04 01:30:29 +0000 | [diff] [blame] | 455 | err = -EAFNOSUPPORT; |
Eric Dumazet | 29c486d | 2011-08-30 18:57:00 -0400 | [diff] [blame] | 456 | if (addr->sin_family != AF_UNSPEC || |
| 457 | addr->sin_addr.s_addr != htonl(INADDR_ANY)) |
| 458 | goto out; |
Marcus Meissner | c349a52 | 2011-07-04 01:30:29 +0000 | [diff] [blame] | 459 | } |
Marcus Meissner | d0733d2 | 2011-06-01 21:05:22 -0700 | [diff] [blame] | 460 | |
David Ahern | 3236b00 | 2015-09-29 20:07:14 -0700 | [diff] [blame] | 461 | 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] | 462 | 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] | 463 | |
| 464 | /* Not specified by any standard per-se, however it breaks too |
| 465 | * many applications when removed. It is unfortunate since |
| 466 | * allowing applications to make a non-local bind solves |
| 467 | * several problems with systems using dynamic addressing. |
| 468 | * (ie. your servers still start up even if your ISDN link |
| 469 | * is temporarily down) |
| 470 | */ |
| 471 | err = -EADDRNOTAVAIL; |
Vincent Bernat | 49a6015 | 2014-09-05 15:09:03 +0200 | [diff] [blame] | 472 | if (!net->ipv4.sysctl_ip_nonlocal_bind && |
Tóth László Attila | b9fb150 | 2008-10-01 07:31:24 -0700 | [diff] [blame] | 473 | !(inet->freebind || inet->transparent) && |
Al Viro | e6f1ceb | 2008-03-17 22:44:53 -0700 | [diff] [blame] | 474 | addr->sin_addr.s_addr != htonl(INADDR_ANY) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | chk_addr_ret != RTN_LOCAL && |
| 476 | chk_addr_ret != RTN_MULTICAST && |
| 477 | chk_addr_ret != RTN_BROADCAST) |
| 478 | goto out; |
| 479 | |
| 480 | snum = ntohs(addr->sin_port); |
| 481 | err = -EACCES; |
Eric W. Biederman | 3594698 | 2012-11-16 03:03:12 +0000 | [diff] [blame] | 482 | if (snum && snum < PROT_SOCK && |
| 483 | !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | goto out; |
| 485 | |
| 486 | /* We keep a pair of addresses. rcv_saddr is the one |
| 487 | * used by hash lookups, and saddr is used for transmit. |
| 488 | * |
| 489 | * In the BSD API these are the same except where it |
| 490 | * would be illegal to use them (multicast/broadcast) in |
| 491 | * which case the sending device address is used. |
| 492 | */ |
| 493 | lock_sock(sk); |
| 494 | |
| 495 | /* Check these errors (active socket, double bind). */ |
| 496 | err = -EINVAL; |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 497 | if (sk->sk_state != TCP_CLOSE || inet->inet_num) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | goto out_release_sock; |
| 499 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 500 | inet->inet_rcv_saddr = inet->inet_saddr = addr->sin_addr.s_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST) |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 502 | inet->inet_saddr = 0; /* Use device */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | |
| 504 | /* Make sure we are allowed to bind here. */ |
Eric Dumazet | 90c337d | 2015-06-06 21:17:57 -0700 | [diff] [blame] | 505 | if ((snum || !inet->bind_address_no_port) && |
| 506 | sk->sk_prot->get_port(sk, snum)) { |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 507 | inet->inet_saddr = inet->inet_rcv_saddr = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | err = -EADDRINUSE; |
| 509 | goto out_release_sock; |
| 510 | } |
| 511 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 512 | if (inet->inet_rcv_saddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | sk->sk_userlocks |= SOCK_BINDADDR_LOCK; |
| 514 | if (snum) |
| 515 | sk->sk_userlocks |= SOCK_BINDPORT_LOCK; |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 516 | inet->inet_sport = htons(inet->inet_num); |
| 517 | inet->inet_daddr = 0; |
| 518 | inet->inet_dport = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | sk_dst_reset(sk); |
| 520 | err = 0; |
| 521 | out_release_sock: |
| 522 | release_sock(sk); |
| 523 | out: |
| 524 | return err; |
| 525 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 526 | EXPORT_SYMBOL(inet_bind); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | |
Daniel Baluta | 5e73ea1 | 2012-04-15 01:34:41 +0000 | [diff] [blame] | 528 | int inet_dgram_connect(struct socket *sock, struct sockaddr *uaddr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | int addr_len, int flags) |
| 530 | { |
| 531 | struct sock *sk = sock->sk; |
| 532 | |
Changli Gao | 6503d96 | 2010-03-31 22:58:26 +0000 | [diff] [blame] | 533 | if (addr_len < sizeof(uaddr->sa_family)) |
| 534 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | if (uaddr->sa_family == AF_UNSPEC) |
| 536 | return sk->sk_prot->disconnect(sk, flags); |
| 537 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 538 | if (!inet_sk(sk)->inet_num && inet_autobind(sk)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | return -EAGAIN; |
Joe Perches | e319269 | 2012-06-03 17:41:40 +0000 | [diff] [blame] | 540 | return sk->sk_prot->connect(sk, uaddr, addr_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 542 | EXPORT_SYMBOL(inet_dgram_connect); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | |
Yuchung Cheng | 783237e | 2012-07-19 06:43:07 +0000 | [diff] [blame] | 544 | 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] | 545 | { |
WANG Cong | 14135f3 | 2016-11-01 16:04:36 -0700 | [diff] [blame] | 546 | DEFINE_WAIT_FUNC(wait, woken_wake_function); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | |
WANG Cong | 14135f3 | 2016-11-01 16:04:36 -0700 | [diff] [blame] | 548 | add_wait_queue(sk_sleep(sk), &wait); |
Yuchung Cheng | 783237e | 2012-07-19 06:43:07 +0000 | [diff] [blame] | 549 | sk->sk_write_pending += writebias; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | |
| 551 | /* Basic assumption: if someone sets sk->sk_err, he _must_ |
| 552 | * change state of the socket from TCP_SYN_*. |
| 553 | * Connect() does not allow to get error notifications |
| 554 | * without closing the socket. |
| 555 | */ |
| 556 | while ((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV)) { |
| 557 | release_sock(sk); |
WANG Cong | 14135f3 | 2016-11-01 16:04:36 -0700 | [diff] [blame] | 558 | timeo = wait_woken(&wait, TASK_INTERRUPTIBLE, timeo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | lock_sock(sk); |
| 560 | if (signal_pending(current) || !timeo) |
| 561 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | } |
WANG Cong | 14135f3 | 2016-11-01 16:04:36 -0700 | [diff] [blame] | 563 | remove_wait_queue(sk_sleep(sk), &wait); |
Yuchung Cheng | 783237e | 2012-07-19 06:43:07 +0000 | [diff] [blame] | 564 | sk->sk_write_pending -= writebias; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | return timeo; |
| 566 | } |
| 567 | |
| 568 | /* |
| 569 | * Connect to a remote host. There is regrettably still a little |
| 570 | * TCP 'magic' in here. |
| 571 | */ |
Yuchung Cheng | cf60af0 | 2012-07-19 06:43:09 +0000 | [diff] [blame] | 572 | int __inet_stream_connect(struct socket *sock, struct sockaddr *uaddr, |
| 573 | int addr_len, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | { |
| 575 | struct sock *sk = sock->sk; |
| 576 | int err; |
| 577 | long timeo; |
| 578 | |
Changli Gao | 6503d96 | 2010-03-31 22:58:26 +0000 | [diff] [blame] | 579 | if (addr_len < sizeof(uaddr->sa_family)) |
| 580 | return -EINVAL; |
| 581 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | if (uaddr->sa_family == AF_UNSPEC) { |
| 583 | err = sk->sk_prot->disconnect(sk, flags); |
| 584 | sock->state = err ? SS_DISCONNECTING : SS_UNCONNECTED; |
| 585 | goto out; |
| 586 | } |
| 587 | |
| 588 | switch (sock->state) { |
| 589 | default: |
| 590 | err = -EINVAL; |
| 591 | goto out; |
| 592 | case SS_CONNECTED: |
| 593 | err = -EISCONN; |
| 594 | goto out; |
| 595 | case SS_CONNECTING: |
| 596 | err = -EALREADY; |
| 597 | /* Fall out of switch with err, set for this state */ |
| 598 | break; |
| 599 | case SS_UNCONNECTED: |
| 600 | err = -EISCONN; |
| 601 | if (sk->sk_state != TCP_CLOSE) |
| 602 | goto out; |
| 603 | |
| 604 | err = sk->sk_prot->connect(sk, uaddr, addr_len); |
| 605 | if (err < 0) |
| 606 | goto out; |
| 607 | |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 608 | sock->state = SS_CONNECTING; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | |
| 610 | /* Just entered SS_CONNECTING state; the only |
| 611 | * difference is that return value in non-blocking |
| 612 | * case is EINPROGRESS, rather than EALREADY. |
| 613 | */ |
| 614 | err = -EINPROGRESS; |
| 615 | break; |
| 616 | } |
| 617 | |
| 618 | timeo = sock_sndtimeo(sk, flags & O_NONBLOCK); |
| 619 | |
| 620 | if ((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV)) { |
Yuchung Cheng | 783237e | 2012-07-19 06:43:07 +0000 | [diff] [blame] | 621 | int writebias = (sk->sk_protocol == IPPROTO_TCP) && |
| 622 | tcp_sk(sk)->fastopen_req && |
| 623 | tcp_sk(sk)->fastopen_req->data ? 1 : 0; |
| 624 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | /* Error code is set above */ |
Yuchung Cheng | 783237e | 2012-07-19 06:43:07 +0000 | [diff] [blame] | 626 | if (!timeo || !inet_wait_for_connect(sk, timeo, writebias)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | goto out; |
| 628 | |
| 629 | err = sock_intr_errno(timeo); |
| 630 | if (signal_pending(current)) |
| 631 | goto out; |
| 632 | } |
| 633 | |
| 634 | /* Connection was closed by RST, timeout, ICMP error |
| 635 | * or another process disconnected us. |
| 636 | */ |
| 637 | if (sk->sk_state == TCP_CLOSE) |
| 638 | goto sock_error; |
| 639 | |
| 640 | /* sk->sk_err may be not zero now, if RECVERR was ordered by user |
| 641 | * and error was received after socket entered established state. |
| 642 | * Hence, it is handled normally after connect() return successfully. |
| 643 | */ |
| 644 | |
| 645 | sock->state = SS_CONNECTED; |
| 646 | err = 0; |
| 647 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | return err; |
| 649 | |
| 650 | sock_error: |
| 651 | err = sock_error(sk) ? : -ECONNABORTED; |
| 652 | sock->state = SS_UNCONNECTED; |
| 653 | if (sk->sk_prot->disconnect(sk, flags)) |
| 654 | sock->state = SS_DISCONNECTING; |
| 655 | goto out; |
| 656 | } |
Yuchung Cheng | cf60af0 | 2012-07-19 06:43:09 +0000 | [diff] [blame] | 657 | EXPORT_SYMBOL(__inet_stream_connect); |
| 658 | |
| 659 | int inet_stream_connect(struct socket *sock, struct sockaddr *uaddr, |
| 660 | int addr_len, int flags) |
| 661 | { |
| 662 | int err; |
| 663 | |
| 664 | lock_sock(sock->sk); |
| 665 | err = __inet_stream_connect(sock, uaddr, addr_len, flags); |
| 666 | release_sock(sock->sk); |
| 667 | return err; |
| 668 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 669 | EXPORT_SYMBOL(inet_stream_connect); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | |
| 671 | /* |
| 672 | * Accept a pending connection. The TCP layer now gives BSD semantics. |
| 673 | */ |
| 674 | |
| 675 | int inet_accept(struct socket *sock, struct socket *newsock, int flags) |
| 676 | { |
| 677 | struct sock *sk1 = sock->sk; |
| 678 | int err = -EINVAL; |
| 679 | struct sock *sk2 = sk1->sk_prot->accept(sk1, flags, &err); |
| 680 | |
| 681 | if (!sk2) |
| 682 | goto do_err; |
| 683 | |
| 684 | lock_sock(sk2); |
| 685 | |
Eric Dumazet | 1eddcea | 2011-06-17 03:45:15 +0000 | [diff] [blame] | 686 | sock_rps_record_flow(sk2); |
Ilpo Järvinen | 547b792 | 2008-07-25 21:43:18 -0700 | [diff] [blame] | 687 | WARN_ON(!((1 << sk2->sk_state) & |
Jerry Chu | 8336886 | 2012-08-31 12:29:12 +0000 | [diff] [blame] | 688 | (TCPF_ESTABLISHED | TCPF_SYN_RECV | |
| 689 | TCPF_CLOSE_WAIT | TCPF_CLOSE))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | |
| 691 | sock_graft(sk2, newsock); |
| 692 | |
| 693 | newsock->state = SS_CONNECTED; |
| 694 | err = 0; |
| 695 | release_sock(sk2); |
| 696 | do_err: |
| 697 | return err; |
| 698 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 699 | EXPORT_SYMBOL(inet_accept); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 700 | |
| 701 | |
| 702 | /* |
| 703 | * This does both peername and sockname. |
| 704 | */ |
| 705 | int inet_getname(struct socket *sock, struct sockaddr *uaddr, |
| 706 | int *uaddr_len, int peer) |
| 707 | { |
| 708 | struct sock *sk = sock->sk; |
| 709 | struct inet_sock *inet = inet_sk(sk); |
Cyrill Gorcunov | 38bfd8f | 2009-10-29 02:59:18 -0700 | [diff] [blame] | 710 | DECLARE_SOCKADDR(struct sockaddr_in *, sin, uaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | |
| 712 | sin->sin_family = AF_INET; |
| 713 | if (peer) { |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 714 | if (!inet->inet_dport || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) && |
| 716 | peer == 1)) |
| 717 | return -ENOTCONN; |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 718 | sin->sin_port = inet->inet_dport; |
| 719 | sin->sin_addr.s_addr = inet->inet_daddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | } else { |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 721 | __be32 addr = inet->inet_rcv_saddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | if (!addr) |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 723 | addr = inet->inet_saddr; |
| 724 | sin->sin_port = inet->inet_sport; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | sin->sin_addr.s_addr = addr; |
| 726 | } |
| 727 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); |
| 728 | *uaddr_len = sizeof(*sin); |
| 729 | return 0; |
| 730 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 731 | EXPORT_SYMBOL(inet_getname); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | |
Ying Xue | 1b78414 | 2015-03-02 15:37:48 +0800 | [diff] [blame] | 733 | int inet_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | { |
| 735 | struct sock *sk = sock->sk; |
| 736 | |
David S. Miller | c58dc01 | 2010-04-27 15:05:31 -0700 | [diff] [blame] | 737 | sock_rps_record_flow(sk); |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 738 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | /* We may need to bind the socket. */ |
Changli Gao | 7ba4291 | 2010-07-10 20:41:55 +0000 | [diff] [blame] | 740 | if (!inet_sk(sk)->inet_num && !sk->sk_prot->no_autobind && |
| 741 | inet_autobind(sk)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | return -EAGAIN; |
| 743 | |
Ying Xue | 1b78414 | 2015-03-02 15:37:48 +0800 | [diff] [blame] | 744 | return sk->sk_prot->sendmsg(sk, msg, size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 746 | EXPORT_SYMBOL(inet_sendmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | |
Changli Gao | 7ba4291 | 2010-07-10 20:41:55 +0000 | [diff] [blame] | 748 | ssize_t inet_sendpage(struct socket *sock, struct page *page, int offset, |
| 749 | size_t size, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | { |
| 751 | struct sock *sk = sock->sk; |
| 752 | |
David S. Miller | c58dc01 | 2010-04-27 15:05:31 -0700 | [diff] [blame] | 753 | sock_rps_record_flow(sk); |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 754 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | /* We may need to bind the socket. */ |
Changli Gao | 7ba4291 | 2010-07-10 20:41:55 +0000 | [diff] [blame] | 756 | if (!inet_sk(sk)->inet_num && !sk->sk_prot->no_autobind && |
| 757 | inet_autobind(sk)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | return -EAGAIN; |
| 759 | |
| 760 | if (sk->sk_prot->sendpage) |
| 761 | return sk->sk_prot->sendpage(sk, page, offset, size, flags); |
| 762 | return sock_no_sendpage(sock, page, offset, size, flags); |
| 763 | } |
Changli Gao | 7ba4291 | 2010-07-10 20:41:55 +0000 | [diff] [blame] | 764 | EXPORT_SYMBOL(inet_sendpage); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | |
Ying Xue | 1b78414 | 2015-03-02 15:37:48 +0800 | [diff] [blame] | 766 | int inet_recvmsg(struct socket *sock, struct msghdr *msg, size_t size, |
| 767 | int flags) |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 768 | { |
| 769 | struct sock *sk = sock->sk; |
| 770 | int addr_len = 0; |
| 771 | int err; |
| 772 | |
David S. Miller | c58dc01 | 2010-04-27 15:05:31 -0700 | [diff] [blame] | 773 | sock_rps_record_flow(sk); |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 774 | |
Ying Xue | 1b78414 | 2015-03-02 15:37:48 +0800 | [diff] [blame] | 775 | err = sk->sk_prot->recvmsg(sk, msg, size, flags & MSG_DONTWAIT, |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 776 | flags & ~MSG_DONTWAIT, &addr_len); |
| 777 | if (err >= 0) |
| 778 | msg->msg_namelen = addr_len; |
| 779 | return err; |
| 780 | } |
| 781 | EXPORT_SYMBOL(inet_recvmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | |
| 783 | int inet_shutdown(struct socket *sock, int how) |
| 784 | { |
| 785 | struct sock *sk = sock->sk; |
| 786 | int err = 0; |
| 787 | |
| 788 | /* This should really check to make sure |
| 789 | * the socket is a TCP socket. (WHY AC...) |
| 790 | */ |
| 791 | how++; /* maps 0->1 has the advantage of making bit 1 rcvs and |
| 792 | 1->2 bit 2 snds. |
| 793 | 2->3 */ |
| 794 | if ((how & ~SHUTDOWN_MASK) || !how) /* MAXINT->0 */ |
| 795 | return -EINVAL; |
| 796 | |
| 797 | lock_sock(sk); |
| 798 | if (sock->state == SS_CONNECTING) { |
| 799 | if ((1 << sk->sk_state) & |
| 800 | (TCPF_SYN_SENT | TCPF_SYN_RECV | TCPF_CLOSE)) |
| 801 | sock->state = SS_DISCONNECTING; |
| 802 | else |
| 803 | sock->state = SS_CONNECTED; |
| 804 | } |
| 805 | |
| 806 | switch (sk->sk_state) { |
| 807 | case TCP_CLOSE: |
| 808 | err = -ENOTCONN; |
| 809 | /* Hack to wake up other listeners, who can poll for |
| 810 | POLLHUP, even on eg. unconnected UDP sockets -- RR */ |
| 811 | default: |
| 812 | sk->sk_shutdown |= how; |
| 813 | if (sk->sk_prot->shutdown) |
| 814 | sk->sk_prot->shutdown(sk, how); |
| 815 | break; |
| 816 | |
| 817 | /* Remaining two branches are temporary solution for missing |
| 818 | * close() in multithreaded environment. It is _not_ a good idea, |
| 819 | * but we have no choice until close() is repaired at VFS level. |
| 820 | */ |
| 821 | case TCP_LISTEN: |
| 822 | if (!(how & RCV_SHUTDOWN)) |
| 823 | break; |
| 824 | /* Fall through */ |
| 825 | case TCP_SYN_SENT: |
| 826 | err = sk->sk_prot->disconnect(sk, O_NONBLOCK); |
| 827 | sock->state = err ? SS_DISCONNECTING : SS_UNCONNECTED; |
| 828 | break; |
| 829 | } |
| 830 | |
| 831 | /* Wake up anyone sleeping in poll. */ |
| 832 | sk->sk_state_change(sk); |
| 833 | release_sock(sk); |
| 834 | return err; |
| 835 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 836 | EXPORT_SYMBOL(inet_shutdown); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | |
| 838 | /* |
| 839 | * ioctl() calls you can issue on an INET socket. Most of these are |
| 840 | * device configuration and stuff and very rarely used. Some ioctls |
| 841 | * pass on to the socket itself. |
| 842 | * |
| 843 | * NOTE: I like the idea of a module for the config stuff. ie ifconfig |
| 844 | * loads the devconfigure module does its configuring and unloads it. |
| 845 | * There's a good 20K of config code hanging around the kernel. |
| 846 | */ |
| 847 | |
| 848 | int inet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
| 849 | { |
| 850 | struct sock *sk = sock->sk; |
| 851 | int err = 0; |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 852 | struct net *net = sock_net(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | |
| 854 | switch (cmd) { |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 855 | case SIOCGSTAMP: |
| 856 | err = sock_get_timestamp(sk, (struct timeval __user *)arg); |
| 857 | break; |
| 858 | case SIOCGSTAMPNS: |
| 859 | err = sock_get_timestampns(sk, (struct timespec __user *)arg); |
| 860 | break; |
| 861 | case SIOCADDRT: |
| 862 | case SIOCDELRT: |
| 863 | case SIOCRTMSG: |
| 864 | err = ip_rt_ioctl(net, cmd, (void __user *)arg); |
| 865 | break; |
| 866 | case SIOCDARP: |
| 867 | case SIOCGARP: |
| 868 | case SIOCSARP: |
| 869 | err = arp_ioctl(net, cmd, (void __user *)arg); |
| 870 | break; |
| 871 | case SIOCGIFADDR: |
| 872 | case SIOCSIFADDR: |
| 873 | case SIOCGIFBRDADDR: |
| 874 | case SIOCSIFBRDADDR: |
| 875 | case SIOCGIFNETMASK: |
| 876 | case SIOCSIFNETMASK: |
| 877 | case SIOCGIFDSTADDR: |
| 878 | case SIOCSIFDSTADDR: |
| 879 | case SIOCSIFPFLAGS: |
| 880 | case SIOCGIFPFLAGS: |
| 881 | case SIOCSIFFLAGS: |
| 882 | err = devinet_ioctl(net, cmd, (void __user *)arg); |
| 883 | break; |
| 884 | default: |
| 885 | if (sk->sk_prot->ioctl) |
| 886 | err = sk->sk_prot->ioctl(sk, cmd, arg); |
| 887 | else |
| 888 | err = -ENOIOCTLCMD; |
| 889 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | } |
| 891 | return err; |
| 892 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 893 | EXPORT_SYMBOL(inet_ioctl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | |
Eric W. Biederman | 709b46e | 2011-01-29 16:15:56 +0000 | [diff] [blame] | 895 | #ifdef CONFIG_COMPAT |
Gerrit Renker | 686dc6b | 2011-10-15 09:26:56 +0000 | [diff] [blame] | 896 | 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] | 897 | { |
| 898 | struct sock *sk = sock->sk; |
| 899 | int err = -ENOIOCTLCMD; |
| 900 | |
| 901 | if (sk->sk_prot->compat_ioctl) |
| 902 | err = sk->sk_prot->compat_ioctl(sk, cmd, arg); |
| 903 | |
| 904 | return err; |
| 905 | } |
| 906 | #endif |
| 907 | |
Eric Dumazet | 90ddc4f | 2005-12-22 12:49:22 -0800 | [diff] [blame] | 908 | const struct proto_ops inet_stream_ops = { |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 909 | .family = PF_INET, |
| 910 | .owner = THIS_MODULE, |
| 911 | .release = inet_release, |
| 912 | .bind = inet_bind, |
| 913 | .connect = inet_stream_connect, |
| 914 | .socketpair = sock_no_socketpair, |
| 915 | .accept = inet_accept, |
| 916 | .getname = inet_getname, |
| 917 | .poll = tcp_poll, |
| 918 | .ioctl = inet_ioctl, |
| 919 | .listen = inet_listen, |
| 920 | .shutdown = inet_shutdown, |
| 921 | .setsockopt = sock_common_setsockopt, |
| 922 | .getsockopt = sock_common_getsockopt, |
Changli Gao | 7ba4291 | 2010-07-10 20:41:55 +0000 | [diff] [blame] | 923 | .sendmsg = inet_sendmsg, |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 924 | .recvmsg = inet_recvmsg, |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 925 | .mmap = sock_no_mmap, |
Changli Gao | 7ba4291 | 2010-07-10 20:41:55 +0000 | [diff] [blame] | 926 | .sendpage = inet_sendpage, |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 927 | .splice_read = tcp_splice_read, |
Tom Herbert | 3203558 | 2016-08-28 14:43:18 -0700 | [diff] [blame] | 928 | .read_sock = tcp_read_sock, |
| 929 | .peek_len = tcp_peek_len, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 930 | #ifdef CONFIG_COMPAT |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 931 | .compat_setsockopt = compat_sock_common_setsockopt, |
| 932 | .compat_getsockopt = compat_sock_common_getsockopt, |
Eric W. Biederman | 709b46e | 2011-01-29 16:15:56 +0000 | [diff] [blame] | 933 | .compat_ioctl = inet_compat_ioctl, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 934 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 935 | }; |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 936 | EXPORT_SYMBOL(inet_stream_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | |
Eric Dumazet | 90ddc4f | 2005-12-22 12:49:22 -0800 | [diff] [blame] | 938 | const struct proto_ops inet_dgram_ops = { |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 939 | .family = PF_INET, |
| 940 | .owner = THIS_MODULE, |
| 941 | .release = inet_release, |
| 942 | .bind = inet_bind, |
| 943 | .connect = inet_dgram_connect, |
| 944 | .socketpair = sock_no_socketpair, |
| 945 | .accept = sock_no_accept, |
| 946 | .getname = inet_getname, |
| 947 | .poll = udp_poll, |
| 948 | .ioctl = inet_ioctl, |
| 949 | .listen = sock_no_listen, |
| 950 | .shutdown = inet_shutdown, |
| 951 | .setsockopt = sock_common_setsockopt, |
| 952 | .getsockopt = sock_common_getsockopt, |
| 953 | .sendmsg = inet_sendmsg, |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 954 | .recvmsg = inet_recvmsg, |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 955 | .mmap = sock_no_mmap, |
| 956 | .sendpage = inet_sendpage, |
samanthakumar | 627d2d6 | 2016-04-05 12:41:16 -0400 | [diff] [blame] | 957 | .set_peek_off = sk_set_peek_off, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 958 | #ifdef CONFIG_COMPAT |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 959 | .compat_setsockopt = compat_sock_common_setsockopt, |
| 960 | .compat_getsockopt = compat_sock_common_getsockopt, |
Eric W. Biederman | 709b46e | 2011-01-29 16:15:56 +0000 | [diff] [blame] | 961 | .compat_ioctl = inet_compat_ioctl, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 962 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 963 | }; |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 964 | EXPORT_SYMBOL(inet_dgram_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 965 | |
| 966 | /* |
| 967 | * For SOCK_RAW sockets; should be the same as inet_dgram_ops but without |
| 968 | * udp_poll |
| 969 | */ |
Eric Dumazet | 90ddc4f | 2005-12-22 12:49:22 -0800 | [diff] [blame] | 970 | static const struct proto_ops inet_sockraw_ops = { |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 971 | .family = PF_INET, |
| 972 | .owner = THIS_MODULE, |
| 973 | .release = inet_release, |
| 974 | .bind = inet_bind, |
| 975 | .connect = inet_dgram_connect, |
| 976 | .socketpair = sock_no_socketpair, |
| 977 | .accept = sock_no_accept, |
| 978 | .getname = inet_getname, |
| 979 | .poll = datagram_poll, |
| 980 | .ioctl = inet_ioctl, |
| 981 | .listen = sock_no_listen, |
| 982 | .shutdown = inet_shutdown, |
| 983 | .setsockopt = sock_common_setsockopt, |
| 984 | .getsockopt = sock_common_getsockopt, |
| 985 | .sendmsg = inet_sendmsg, |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 986 | .recvmsg = inet_recvmsg, |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 987 | .mmap = sock_no_mmap, |
| 988 | .sendpage = inet_sendpage, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 989 | #ifdef CONFIG_COMPAT |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 990 | .compat_setsockopt = compat_sock_common_setsockopt, |
| 991 | .compat_getsockopt = compat_sock_common_getsockopt, |
Eric W. Biederman | 709b46e | 2011-01-29 16:15:56 +0000 | [diff] [blame] | 992 | .compat_ioctl = inet_compat_ioctl, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 993 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 994 | }; |
| 995 | |
Stephen Hemminger | ec1b4cf | 2009-10-05 05:58:39 +0000 | [diff] [blame] | 996 | static const struct net_proto_family inet_family_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 997 | .family = PF_INET, |
| 998 | .create = inet_create, |
| 999 | .owner = THIS_MODULE, |
| 1000 | }; |
| 1001 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1002 | /* Upon startup we insert all the elements in inetsw_array[] into |
| 1003 | * the linked list inetsw. |
| 1004 | */ |
| 1005 | static struct inet_protosw inetsw_array[] = |
| 1006 | { |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1007 | { |
| 1008 | .type = SOCK_STREAM, |
| 1009 | .protocol = IPPROTO_TCP, |
| 1010 | .prot = &tcp_prot, |
| 1011 | .ops = &inet_stream_ops, |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1012 | .flags = INET_PROTOSW_PERMANENT | |
Arnaldo Carvalho de Melo | d83d846 | 2005-12-13 23:26:10 -0800 | [diff] [blame] | 1013 | INET_PROTOSW_ICSK, |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1014 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1015 | |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1016 | { |
| 1017 | .type = SOCK_DGRAM, |
| 1018 | .protocol = IPPROTO_UDP, |
| 1019 | .prot = &udp_prot, |
| 1020 | .ops = &inet_dgram_ops, |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1021 | .flags = INET_PROTOSW_PERMANENT, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1022 | }, |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1023 | |
Vasiliy Kulikov | c319b4d | 2011-05-13 10:01:00 +0000 | [diff] [blame] | 1024 | { |
| 1025 | .type = SOCK_DGRAM, |
| 1026 | .protocol = IPPROTO_ICMP, |
| 1027 | .prot = &ping_prot, |
| 1028 | .ops = &inet_dgram_ops, |
Vasiliy Kulikov | c319b4d | 2011-05-13 10:01:00 +0000 | [diff] [blame] | 1029 | .flags = INET_PROTOSW_REUSE, |
| 1030 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1031 | |
| 1032 | { |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1033 | .type = SOCK_RAW, |
| 1034 | .protocol = IPPROTO_IP, /* wild card */ |
| 1035 | .prot = &raw_prot, |
| 1036 | .ops = &inet_sockraw_ops, |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1037 | .flags = INET_PROTOSW_REUSE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1038 | } |
| 1039 | }; |
| 1040 | |
Denis Cheng | c40f6ff | 2007-09-16 16:39:25 -0700 | [diff] [blame] | 1041 | #define INETSW_ARRAY_LEN ARRAY_SIZE(inetsw_array) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1042 | |
| 1043 | void inet_register_protosw(struct inet_protosw *p) |
| 1044 | { |
| 1045 | struct list_head *lh; |
| 1046 | struct inet_protosw *answer; |
| 1047 | int protocol = p->protocol; |
| 1048 | struct list_head *last_perm; |
| 1049 | |
| 1050 | spin_lock_bh(&inetsw_lock); |
| 1051 | |
| 1052 | if (p->type >= SOCK_MAX) |
| 1053 | goto out_illegal; |
| 1054 | |
| 1055 | /* If we are trying to override a permanent protocol, bail. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | last_perm = &inetsw[p->type]; |
| 1057 | list_for_each(lh, &inetsw[p->type]) { |
| 1058 | answer = list_entry(lh, struct inet_protosw, list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1059 | /* Check only the non-wild match. */ |
Junwei Zhang | f6c5333 | 2015-09-18 00:00:05 -0400 | [diff] [blame] | 1060 | if ((INET_PROTOSW_PERMANENT & answer->flags) == 0) |
| 1061 | break; |
| 1062 | if (protocol == answer->protocol) |
| 1063 | goto out_permanent; |
| 1064 | last_perm = lh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1065 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1066 | |
| 1067 | /* Add the new entry after the last permanent entry if any, so that |
| 1068 | * the new entry does not override a permanent entry when matched with |
| 1069 | * a wild-card protocol. But it is allowed to override any existing |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1070 | * non-permanent entry. This means that when we remove this entry, the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | * system automatically returns to the old behavior. |
| 1072 | */ |
| 1073 | list_add_rcu(&p->list, last_perm); |
| 1074 | out: |
| 1075 | spin_unlock_bh(&inetsw_lock); |
| 1076 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | return; |
| 1078 | |
| 1079 | out_permanent: |
Joe Perches | 058bd4d | 2012-03-11 18:36:11 +0000 | [diff] [blame] | 1080 | pr_err("Attempt to override permanent protocol %d\n", protocol); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1081 | goto out; |
| 1082 | |
| 1083 | out_illegal: |
Joe Perches | 058bd4d | 2012-03-11 18:36:11 +0000 | [diff] [blame] | 1084 | pr_err("Ignoring attempt to register invalid socket type %d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1085 | p->type); |
| 1086 | goto out; |
| 1087 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 1088 | EXPORT_SYMBOL(inet_register_protosw); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1089 | |
| 1090 | void inet_unregister_protosw(struct inet_protosw *p) |
| 1091 | { |
| 1092 | if (INET_PROTOSW_PERMANENT & p->flags) { |
Joe Perches | 058bd4d | 2012-03-11 18:36:11 +0000 | [diff] [blame] | 1093 | pr_err("Attempt to unregister permanent protocol %d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | p->protocol); |
| 1095 | } else { |
| 1096 | spin_lock_bh(&inetsw_lock); |
| 1097 | list_del_rcu(&p->list); |
| 1098 | spin_unlock_bh(&inetsw_lock); |
| 1099 | |
| 1100 | synchronize_net(); |
| 1101 | } |
| 1102 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 1103 | EXPORT_SYMBOL(inet_unregister_protosw); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1104 | |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1105 | static int inet_sk_reselect_saddr(struct sock *sk) |
| 1106 | { |
| 1107 | struct inet_sock *inet = inet_sk(sk); |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 1108 | __be32 old_saddr = inet->inet_saddr; |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 1109 | __be32 daddr = inet->inet_daddr; |
David S. Miller | 6e86913 | 2011-05-06 16:18:04 -0700 | [diff] [blame] | 1110 | struct flowi4 *fl4; |
David S. Miller | b23dd4f | 2011-03-02 14:31:35 -0800 | [diff] [blame] | 1111 | struct rtable *rt; |
| 1112 | __be32 new_saddr; |
Eric Dumazet | f6d8bd0 | 2011-04-21 09:45:37 +0000 | [diff] [blame] | 1113 | struct ip_options_rcu *inet_opt; |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1114 | |
Eric Dumazet | f6d8bd0 | 2011-04-21 09:45:37 +0000 | [diff] [blame] | 1115 | inet_opt = rcu_dereference_protected(inet->inet_opt, |
Hannes Frederic Sowa | 1e1d04e | 2016-04-05 17:10:15 +0200 | [diff] [blame] | 1116 | lockdep_sock_is_held(sk)); |
Eric Dumazet | f6d8bd0 | 2011-04-21 09:45:37 +0000 | [diff] [blame] | 1117 | if (inet_opt && inet_opt->opt.srr) |
| 1118 | daddr = inet_opt->opt.faddr; |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1119 | |
| 1120 | /* Query new route. */ |
David S. Miller | 6e86913 | 2011-05-06 16:18:04 -0700 | [diff] [blame] | 1121 | fl4 = &inet->cork.fl.u.ip4; |
| 1122 | rt = ip_route_connect(fl4, daddr, 0, RT_CONN_FLAGS(sk), |
David S. Miller | b23dd4f | 2011-03-02 14:31:35 -0800 | [diff] [blame] | 1123 | sk->sk_bound_dev_if, sk->sk_protocol, |
Steffen Klassert | 0e0d44a | 2013-08-28 08:04:14 +0200 | [diff] [blame] | 1124 | inet->inet_sport, inet->inet_dport, sk); |
David S. Miller | b23dd4f | 2011-03-02 14:31:35 -0800 | [diff] [blame] | 1125 | if (IS_ERR(rt)) |
| 1126 | return PTR_ERR(rt); |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1127 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1128 | sk_setup_caps(sk, &rt->dst); |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1129 | |
David S. Miller | 6e86913 | 2011-05-06 16:18:04 -0700 | [diff] [blame] | 1130 | new_saddr = fl4->saddr; |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1131 | |
| 1132 | if (new_saddr == old_saddr) |
| 1133 | return 0; |
| 1134 | |
Nikolay Borisov | 287b7f3 | 2016-02-15 12:11:29 +0200 | [diff] [blame] | 1135 | if (sock_net(sk)->ipv4.sysctl_ip_dynaddr > 1) { |
Joe Perches | 058bd4d | 2012-03-11 18:36:11 +0000 | [diff] [blame] | 1136 | pr_info("%s(): shifting inet->saddr from %pI4 to %pI4\n", |
| 1137 | __func__, &old_saddr, &new_saddr); |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1138 | } |
| 1139 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 1140 | inet->inet_saddr = inet->inet_rcv_saddr = new_saddr; |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1141 | |
| 1142 | /* |
| 1143 | * XXX The only one ugly spot where we need to |
| 1144 | * XXX really change the sockets identity after |
| 1145 | * XXX it has entered the hashes. -DaveM |
| 1146 | * |
| 1147 | * Besides that, it does not check for connection |
| 1148 | * uniqueness. Wait for troubles. |
| 1149 | */ |
Craig Gallek | 086c653 | 2016-02-10 11:50:35 -0500 | [diff] [blame] | 1150 | return __sk_prot_rehash(sk); |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1151 | } |
| 1152 | |
| 1153 | int inet_sk_rebuild_header(struct sock *sk) |
| 1154 | { |
| 1155 | struct inet_sock *inet = inet_sk(sk); |
| 1156 | struct rtable *rt = (struct rtable *)__sk_dst_check(sk, 0); |
Al Viro | 3ca3c68 | 2006-09-27 18:28:07 -0700 | [diff] [blame] | 1157 | __be32 daddr; |
Eric Dumazet | f6d8bd0 | 2011-04-21 09:45:37 +0000 | [diff] [blame] | 1158 | struct ip_options_rcu *inet_opt; |
David S. Miller | 6e86913 | 2011-05-06 16:18:04 -0700 | [diff] [blame] | 1159 | struct flowi4 *fl4; |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1160 | int err; |
| 1161 | |
| 1162 | /* Route is OK, nothing to do. */ |
| 1163 | if (rt) |
| 1164 | return 0; |
| 1165 | |
| 1166 | /* Reroute. */ |
Eric Dumazet | f6d8bd0 | 2011-04-21 09:45:37 +0000 | [diff] [blame] | 1167 | rcu_read_lock(); |
| 1168 | inet_opt = rcu_dereference(inet->inet_opt); |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 1169 | daddr = inet->inet_daddr; |
Eric Dumazet | f6d8bd0 | 2011-04-21 09:45:37 +0000 | [diff] [blame] | 1170 | if (inet_opt && inet_opt->opt.srr) |
| 1171 | daddr = inet_opt->opt.faddr; |
| 1172 | rcu_read_unlock(); |
David S. Miller | 6e86913 | 2011-05-06 16:18:04 -0700 | [diff] [blame] | 1173 | fl4 = &inet->cork.fl.u.ip4; |
| 1174 | 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] | 1175 | inet->inet_dport, inet->inet_sport, |
| 1176 | sk->sk_protocol, RT_CONN_FLAGS(sk), |
| 1177 | sk->sk_bound_dev_if); |
David S. Miller | b23dd4f | 2011-03-02 14:31:35 -0800 | [diff] [blame] | 1178 | if (!IS_ERR(rt)) { |
| 1179 | err = 0; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1180 | sk_setup_caps(sk, &rt->dst); |
David S. Miller | b23dd4f | 2011-03-02 14:31:35 -0800 | [diff] [blame] | 1181 | } else { |
| 1182 | err = PTR_ERR(rt); |
| 1183 | |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1184 | /* Routing failed... */ |
| 1185 | sk->sk_route_caps = 0; |
| 1186 | /* |
| 1187 | * Other protocols have to map its equivalent state to TCP_SYN_SENT. |
| 1188 | * DCCP maps its DCCP_REQUESTING state to TCP_SYN_SENT. -acme |
| 1189 | */ |
Nikolay Borisov | 287b7f3 | 2016-02-15 12:11:29 +0200 | [diff] [blame] | 1190 | if (!sock_net(sk)->ipv4.sysctl_ip_dynaddr || |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1191 | sk->sk_state != TCP_SYN_SENT || |
| 1192 | (sk->sk_userlocks & SOCK_BINDADDR_LOCK) || |
| 1193 | (err = inet_sk_reselect_saddr(sk)) != 0) |
| 1194 | sk->sk_err_soft = -err; |
| 1195 | } |
| 1196 | |
| 1197 | return err; |
| 1198 | } |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1199 | EXPORT_SYMBOL(inet_sk_rebuild_header); |
| 1200 | |
Tom Herbert | b8921ca | 2016-05-18 09:06:23 -0700 | [diff] [blame] | 1201 | struct sk_buff *inet_gso_segment(struct sk_buff *skb, |
| 1202 | netdev_features_t features) |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1203 | { |
Steffen Klassert | 07b26c9 | 2016-09-19 12:58:47 +0200 | [diff] [blame] | 1204 | bool udpfrag = false, fixedid = false, gso_partial, encap; |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1205 | struct sk_buff *segs = ERR_PTR(-EINVAL); |
Vlad Yasevich | bca49f8 | 2012-11-15 08:49:14 +0000 | [diff] [blame] | 1206 | const struct net_offload *ops; |
Eric Dumazet | 3347c96 | 2013-10-19 11:42:56 -0700 | [diff] [blame] | 1207 | unsigned int offset = 0; |
David S. Miller | f9242b6 | 2012-06-19 18:56:21 -0700 | [diff] [blame] | 1208 | struct iphdr *iph; |
Alexander Duyck | 802ab55 | 2016-04-10 21:45:03 -0400 | [diff] [blame] | 1209 | int proto, tot_len; |
Eric Dumazet | 3347c96 | 2013-10-19 11:42:56 -0700 | [diff] [blame] | 1210 | int nhoff; |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1211 | int ihl; |
| 1212 | int id; |
| 1213 | |
Eric Dumazet | 3347c96 | 2013-10-19 11:42:56 -0700 | [diff] [blame] | 1214 | skb_reset_network_header(skb); |
| 1215 | nhoff = skb_network_header(skb) - skb_mac_header(skb); |
Herbert Xu | bbcf467 | 2006-07-03 19:38:35 -0700 | [diff] [blame] | 1216 | if (unlikely(!pskb_may_pull(skb, sizeof(*iph)))) |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1217 | goto out; |
| 1218 | |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 1219 | iph = ip_hdr(skb); |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1220 | ihl = iph->ihl * 4; |
| 1221 | if (ihl < sizeof(*iph)) |
| 1222 | goto out; |
| 1223 | |
Eric Dumazet | 47d27aa | 2013-10-18 13:13:27 -0700 | [diff] [blame] | 1224 | id = ntohs(iph->id); |
| 1225 | proto = iph->protocol; |
| 1226 | |
| 1227 | /* Warning: after this point, iph might be no longer valid */ |
Herbert Xu | bbcf467 | 2006-07-03 19:38:35 -0700 | [diff] [blame] | 1228 | if (unlikely(!pskb_may_pull(skb, ihl))) |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1229 | goto out; |
Eric Dumazet | 47d27aa | 2013-10-18 13:13:27 -0700 | [diff] [blame] | 1230 | __skb_pull(skb, ihl); |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1231 | |
Eric Dumazet | 8c3a897 | 2013-10-27 18:18:16 -0700 | [diff] [blame] | 1232 | encap = SKB_GSO_CB(skb)->encap_level > 0; |
| 1233 | if (encap) |
Florian Westphal | 1e16aa3 | 2014-10-20 13:49:16 +0200 | [diff] [blame] | 1234 | features &= skb->dev->hw_enc_features; |
Eric Dumazet | 3347c96 | 2013-10-19 11:42:56 -0700 | [diff] [blame] | 1235 | SKB_GSO_CB(skb)->encap_level += ihl; |
Pravin B Shelar | 7313626 | 2013-03-07 13:21:51 +0000 | [diff] [blame] | 1236 | |
Arnaldo Carvalho de Melo | badff6d | 2007-03-13 13:06:52 -0300 | [diff] [blame] | 1237 | skb_reset_transport_header(skb); |
Eric Dumazet | 47d27aa | 2013-10-18 13:13:27 -0700 | [diff] [blame] | 1238 | |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1239 | segs = ERR_PTR(-EPROTONOSUPPORT); |
| 1240 | |
Alexander Duyck | cbc53e0 | 2016-04-10 21:44:51 -0400 | [diff] [blame] | 1241 | if (!skb->encapsulation || encap) { |
| 1242 | udpfrag = !!(skb_shinfo(skb)->gso_type & SKB_GSO_UDP); |
| 1243 | fixedid = !!(skb_shinfo(skb)->gso_type & SKB_GSO_TCP_FIXEDID); |
| 1244 | |
| 1245 | /* fixed ID is invalid if DF bit is not set */ |
Arnaldo Carvalho de Melo | a510887 | 2016-11-28 12:36:58 -0300 | [diff] [blame] | 1246 | if (fixedid && !(ip_hdr(skb)->frag_off & htons(IP_DF))) |
Alexander Duyck | cbc53e0 | 2016-04-10 21:44:51 -0400 | [diff] [blame] | 1247 | goto out; |
| 1248 | } |
Eric Dumazet | dcd6077 | 2013-11-07 18:32:06 -0800 | [diff] [blame] | 1249 | |
Vlad Yasevich | bca49f8 | 2012-11-15 08:49:14 +0000 | [diff] [blame] | 1250 | ops = rcu_dereference(inet_offloads[proto]); |
Vlad Yasevich | f191a1d | 2012-11-15 08:49:23 +0000 | [diff] [blame] | 1251 | if (likely(ops && ops->callbacks.gso_segment)) |
| 1252 | segs = ops->callbacks.gso_segment(skb, features); |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1253 | |
YOSHIFUJI Hideaki / 吉藤英明 | 50c3a48 | 2013-01-22 06:32:49 +0000 | [diff] [blame] | 1254 | if (IS_ERR_OR_NULL(segs)) |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1255 | goto out; |
| 1256 | |
Steffen Klassert | 07b26c9 | 2016-09-19 12:58:47 +0200 | [diff] [blame] | 1257 | gso_partial = !!(skb_shinfo(segs)->gso_type & SKB_GSO_PARTIAL); |
| 1258 | |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1259 | skb = segs; |
| 1260 | do { |
Eric Dumazet | 3347c96 | 2013-10-19 11:42:56 -0700 | [diff] [blame] | 1261 | iph = (struct iphdr *)(skb_mac_header(skb) + nhoff); |
Eric Dumazet | 8c3a897 | 2013-10-27 18:18:16 -0700 | [diff] [blame] | 1262 | if (udpfrag) { |
Sridhar Samudrala | d7ca4cc | 2009-07-09 08:09:47 +0000 | [diff] [blame] | 1263 | iph->frag_off = htons(offset >> 3); |
Ian Morris | 00db412 | 2015-04-03 09:17:27 +0100 | [diff] [blame] | 1264 | if (skb->next) |
Sridhar Samudrala | d7ca4cc | 2009-07-09 08:09:47 +0000 | [diff] [blame] | 1265 | iph->frag_off |= htons(IP_MF); |
Eric Dumazet | 3347c96 | 2013-10-19 11:42:56 -0700 | [diff] [blame] | 1266 | offset += skb->len - nhoff - ihl; |
Alexander Duyck | 802ab55 | 2016-04-10 21:45:03 -0400 | [diff] [blame] | 1267 | tot_len = skb->len - nhoff; |
| 1268 | } else if (skb_is_gso(skb)) { |
| 1269 | if (!fixedid) { |
| 1270 | iph->id = htons(id); |
| 1271 | id += skb_shinfo(skb)->gso_segs; |
| 1272 | } |
Steffen Klassert | 07b26c9 | 2016-09-19 12:58:47 +0200 | [diff] [blame] | 1273 | |
| 1274 | if (gso_partial) |
| 1275 | tot_len = skb_shinfo(skb)->gso_size + |
| 1276 | SKB_GSO_CB(skb)->data_offset + |
| 1277 | skb->head - (unsigned char *)iph; |
| 1278 | else |
| 1279 | tot_len = skb->len - nhoff; |
Alexander Duyck | 802ab55 | 2016-04-10 21:45:03 -0400 | [diff] [blame] | 1280 | } else { |
| 1281 | if (!fixedid) |
| 1282 | iph->id = htons(id++); |
| 1283 | tot_len = skb->len - nhoff; |
Pravin B Shelar | 490ab08 | 2013-02-22 07:30:30 +0000 | [diff] [blame] | 1284 | } |
Alexander Duyck | 802ab55 | 2016-04-10 21:45:03 -0400 | [diff] [blame] | 1285 | iph->tot_len = htons(tot_len); |
Eric Dumazet | 47d27aa | 2013-10-18 13:13:27 -0700 | [diff] [blame] | 1286 | ip_send_check(iph); |
Eric Dumazet | 8c3a897 | 2013-10-27 18:18:16 -0700 | [diff] [blame] | 1287 | if (encap) |
Eric Dumazet | 3347c96 | 2013-10-19 11:42:56 -0700 | [diff] [blame] | 1288 | skb_reset_inner_headers(skb); |
Eric Dumazet | 3347c96 | 2013-10-19 11:42:56 -0700 | [diff] [blame] | 1289 | skb->network_header = (u8 *)iph - skb->head; |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1290 | } while ((skb = skb->next)); |
| 1291 | |
| 1292 | out: |
| 1293 | return segs; |
| 1294 | } |
Tom Herbert | b8921ca | 2016-05-18 09:06:23 -0700 | [diff] [blame] | 1295 | EXPORT_SYMBOL(inet_gso_segment); |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1296 | |
Tom Herbert | b8921ca | 2016-05-18 09:06:23 -0700 | [diff] [blame] | 1297 | 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] | 1298 | { |
Vlad Yasevich | bca49f8 | 2012-11-15 08:49:14 +0000 | [diff] [blame] | 1299 | const struct net_offload *ops; |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1300 | struct sk_buff **pp = NULL; |
| 1301 | struct sk_buff *p; |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1302 | const struct iphdr *iph; |
Herbert Xu | a5b1cf2 | 2009-05-26 18:50:28 +0000 | [diff] [blame] | 1303 | unsigned int hlen; |
| 1304 | unsigned int off; |
Herbert Xu | 1075f3f | 2009-05-26 18:50:29 +0000 | [diff] [blame] | 1305 | unsigned int id; |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1306 | int flush = 1; |
| 1307 | int proto; |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1308 | |
Herbert Xu | a5b1cf2 | 2009-05-26 18:50:28 +0000 | [diff] [blame] | 1309 | off = skb_gro_offset(skb); |
| 1310 | hlen = off + sizeof(*iph); |
| 1311 | iph = skb_gro_header_fast(skb, off); |
| 1312 | if (skb_gro_header_hard(skb, hlen)) { |
| 1313 | iph = skb_gro_header_slow(skb, hlen, off); |
| 1314 | if (unlikely(!iph)) |
| 1315 | goto out; |
| 1316 | } |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1317 | |
David S. Miller | f9242b6 | 2012-06-19 18:56:21 -0700 | [diff] [blame] | 1318 | proto = iph->protocol; |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1319 | |
| 1320 | rcu_read_lock(); |
Vlad Yasevich | bca49f8 | 2012-11-15 08:49:14 +0000 | [diff] [blame] | 1321 | ops = rcu_dereference(inet_offloads[proto]); |
Vlad Yasevich | f191a1d | 2012-11-15 08:49:23 +0000 | [diff] [blame] | 1322 | if (!ops || !ops->callbacks.gro_receive) |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1323 | goto out_unlock; |
| 1324 | |
Herbert Xu | a5ad24b | 2009-02-08 18:00:39 +0000 | [diff] [blame] | 1325 | if (*(u8 *)iph != 0x45) |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1326 | goto out_unlock; |
| 1327 | |
Eric Dumazet | a9e050f | 2012-08-05 22:34:50 +0000 | [diff] [blame] | 1328 | if (unlikely(ip_fast_csum((u8 *)iph, 5))) |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1329 | goto out_unlock; |
| 1330 | |
Eric Dumazet | 0eae88f | 2010-04-20 19:06:52 -0700 | [diff] [blame] | 1331 | id = ntohl(*(__be32 *)&iph->id); |
Eric Dumazet | db8caf3 | 2013-05-31 11:18:10 +0000 | [diff] [blame] | 1332 | flush = (u16)((ntohl(*(__be32 *)iph) ^ skb_gro_len(skb)) | (id & ~IP_DF)); |
Herbert Xu | 1075f3f | 2009-05-26 18:50:29 +0000 | [diff] [blame] | 1333 | id >>= 16; |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1334 | |
| 1335 | for (p = *head; p; p = p->next) { |
| 1336 | struct iphdr *iph2; |
Alexander Duyck | 1530545 | 2016-04-10 21:44:57 -0400 | [diff] [blame] | 1337 | u16 flush_id; |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1338 | |
| 1339 | if (!NAPI_GRO_CB(p)->same_flow) |
| 1340 | continue; |
| 1341 | |
Jerry Chu | 299603e8 | 2013-12-11 20:53:45 -0800 | [diff] [blame] | 1342 | iph2 = (struct iphdr *)(p->data + off); |
| 1343 | /* The above works because, with the exception of the top |
| 1344 | * (inner most) layer, we only aggregate pkts with the same |
| 1345 | * hdr length so all the hdrs we'll need to verify will start |
| 1346 | * at the same offset. |
| 1347 | */ |
Herbert Xu | a5ad24b | 2009-02-08 18:00:39 +0000 | [diff] [blame] | 1348 | if ((iph->protocol ^ iph2->protocol) | |
Eric Dumazet | 0eae88f | 2010-04-20 19:06:52 -0700 | [diff] [blame] | 1349 | ((__force u32)iph->saddr ^ (__force u32)iph2->saddr) | |
| 1350 | ((__force u32)iph->daddr ^ (__force u32)iph2->daddr)) { |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1351 | NAPI_GRO_CB(p)->same_flow = 0; |
| 1352 | continue; |
| 1353 | } |
| 1354 | |
| 1355 | /* All fields must match except length and checksum. */ |
| 1356 | NAPI_GRO_CB(p)->flush |= |
Herbert Xu | a5ad24b | 2009-02-08 18:00:39 +0000 | [diff] [blame] | 1357 | (iph->ttl ^ iph2->ttl) | |
Eric Dumazet | a9e050f | 2012-08-05 22:34:50 +0000 | [diff] [blame] | 1358 | (iph->tos ^ iph2->tos) | |
Jerry Chu | bf5a755 | 2014-01-07 10:23:19 -0800 | [diff] [blame] | 1359 | ((iph->frag_off ^ iph2->frag_off) & htons(IP_DF)); |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1360 | |
| 1361 | NAPI_GRO_CB(p)->flush |= flush; |
Alexander Duyck | 1530545 | 2016-04-10 21:44:57 -0400 | [diff] [blame] | 1362 | |
| 1363 | /* We need to store of the IP ID check to be included later |
| 1364 | * when we can verify that this packet does in fact belong |
| 1365 | * to a given flow. |
| 1366 | */ |
| 1367 | flush_id = (u16)(id - ntohs(iph2->id)); |
| 1368 | |
| 1369 | /* This bit of code makes it much easier for us to identify |
| 1370 | * the cases where we are doing atomic vs non-atomic IP ID |
| 1371 | * checks. Specifically an atomic check can return IP ID |
| 1372 | * values 0 - 0xFFFF, while a non-atomic check can only |
| 1373 | * return 0 or 0xFFFF. |
| 1374 | */ |
| 1375 | if (!NAPI_GRO_CB(p)->is_atomic || |
| 1376 | !(iph->frag_off & htons(IP_DF))) { |
| 1377 | flush_id ^= NAPI_GRO_CB(p)->count; |
| 1378 | flush_id = flush_id ? 0xFFFF : 0; |
| 1379 | } |
| 1380 | |
| 1381 | /* If the previous IP ID value was based on an atomic |
| 1382 | * datagram we can overwrite the value and ignore it. |
| 1383 | */ |
| 1384 | if (NAPI_GRO_CB(skb)->is_atomic) |
| 1385 | NAPI_GRO_CB(p)->flush_id = flush_id; |
| 1386 | else |
| 1387 | NAPI_GRO_CB(p)->flush_id |= flush_id; |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1388 | } |
| 1389 | |
Alexander Duyck | 1530545 | 2016-04-10 21:44:57 -0400 | [diff] [blame] | 1390 | NAPI_GRO_CB(skb)->is_atomic = !!(iph->frag_off & htons(IP_DF)); |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1391 | NAPI_GRO_CB(skb)->flush |= flush; |
Jerry Chu | 299603e8 | 2013-12-11 20:53:45 -0800 | [diff] [blame] | 1392 | skb_set_network_header(skb, off); |
| 1393 | /* The above will be needed by the transport layer if there is one |
| 1394 | * immediately following this IP hdr. |
| 1395 | */ |
| 1396 | |
Eric Dumazet | 2c804d0 | 2014-09-30 22:12:05 -0700 | [diff] [blame] | 1397 | /* Note : No need to call skb_gro_postpull_rcsum() here, |
| 1398 | * as we already checked checksum over ipv4 header was 0 |
| 1399 | */ |
Herbert Xu | 8691173 | 2009-01-29 14:19:50 +0000 | [diff] [blame] | 1400 | skb_gro_pull(skb, sizeof(*iph)); |
| 1401 | skb_set_transport_header(skb, skb_gro_offset(skb)); |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1402 | |
Sabrina Dubroca | fcd91dd | 2016-10-20 15:58:02 +0200 | [diff] [blame] | 1403 | pp = call_gro_receive(ops->callbacks.gro_receive, head, skb); |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1404 | |
| 1405 | out_unlock: |
| 1406 | rcu_read_unlock(); |
| 1407 | |
| 1408 | out: |
| 1409 | NAPI_GRO_CB(skb)->flush |= flush; |
| 1410 | |
| 1411 | return pp; |
| 1412 | } |
Tom Herbert | b8921ca | 2016-05-18 09:06:23 -0700 | [diff] [blame] | 1413 | EXPORT_SYMBOL(inet_gro_receive); |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1414 | |
Jesse Gross | fac8e0f | 2016-03-19 09:32:01 -0700 | [diff] [blame] | 1415 | static struct sk_buff **ipip_gro_receive(struct sk_buff **head, |
| 1416 | struct sk_buff *skb) |
| 1417 | { |
| 1418 | if (NAPI_GRO_CB(skb)->encap_mark) { |
| 1419 | NAPI_GRO_CB(skb)->flush = 1; |
| 1420 | return NULL; |
| 1421 | } |
| 1422 | |
| 1423 | NAPI_GRO_CB(skb)->encap_mark = 1; |
| 1424 | |
| 1425 | return inet_gro_receive(head, skb); |
| 1426 | } |
| 1427 | |
Deepa Dinamani | 822c868 | 2016-02-27 00:32:15 -0800 | [diff] [blame] | 1428 | #define SECONDS_PER_DAY 86400 |
| 1429 | |
| 1430 | /* inet_current_timestamp - Return IP network timestamp |
| 1431 | * |
| 1432 | * Return milliseconds since midnight in network byte order. |
| 1433 | */ |
| 1434 | __be32 inet_current_timestamp(void) |
| 1435 | { |
| 1436 | u32 secs; |
| 1437 | u32 msecs; |
| 1438 | struct timespec64 ts; |
| 1439 | |
| 1440 | ktime_get_real_ts64(&ts); |
| 1441 | |
| 1442 | /* Get secs since midnight. */ |
| 1443 | (void)div_u64_rem(ts.tv_sec, SECONDS_PER_DAY, &secs); |
| 1444 | /* Convert to msecs. */ |
| 1445 | msecs = secs * MSEC_PER_SEC; |
| 1446 | /* Convert nsec to msec. */ |
| 1447 | msecs += (u32)ts.tv_nsec / NSEC_PER_MSEC; |
| 1448 | |
| 1449 | /* Convert to network byte order. */ |
Deepa Dinamani | 3ba9d30 | 2016-03-21 18:21:26 -0700 | [diff] [blame] | 1450 | return htonl(msecs); |
Deepa Dinamani | 822c868 | 2016-02-27 00:32:15 -0800 | [diff] [blame] | 1451 | } |
| 1452 | EXPORT_SYMBOL(inet_current_timestamp); |
| 1453 | |
Willem de Bruijn | f4713a3 | 2014-11-26 14:53:02 -0500 | [diff] [blame] | 1454 | int inet_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len) |
| 1455 | { |
| 1456 | if (sk->sk_family == AF_INET) |
| 1457 | return ip_recv_error(sk, msg, len, addr_len); |
| 1458 | #if IS_ENABLED(CONFIG_IPV6) |
| 1459 | if (sk->sk_family == AF_INET6) |
| 1460 | return pingv6_ops.ipv6_recv_error(sk, msg, len, addr_len); |
| 1461 | #endif |
| 1462 | return -EINVAL; |
| 1463 | } |
| 1464 | |
Tom Herbert | b8921ca | 2016-05-18 09:06:23 -0700 | [diff] [blame] | 1465 | int inet_gro_complete(struct sk_buff *skb, int nhoff) |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1466 | { |
Jerry Chu | 299603e8 | 2013-12-11 20:53:45 -0800 | [diff] [blame] | 1467 | __be16 newlen = htons(skb->len - nhoff); |
| 1468 | struct iphdr *iph = (struct iphdr *)(skb->data + nhoff); |
Vlad Yasevich | bca49f8 | 2012-11-15 08:49:14 +0000 | [diff] [blame] | 1469 | const struct net_offload *ops; |
David S. Miller | f9242b6 | 2012-06-19 18:56:21 -0700 | [diff] [blame] | 1470 | int proto = iph->protocol; |
| 1471 | int err = -ENOSYS; |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1472 | |
Jerry Chu | c3caf11 | 2014-07-14 15:54:46 -0700 | [diff] [blame] | 1473 | if (skb->encapsulation) |
| 1474 | skb_set_inner_network_header(skb, nhoff); |
| 1475 | |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1476 | csum_replace2(&iph->check, iph->tot_len, newlen); |
| 1477 | iph->tot_len = newlen; |
| 1478 | |
| 1479 | rcu_read_lock(); |
Vlad Yasevich | bca49f8 | 2012-11-15 08:49:14 +0000 | [diff] [blame] | 1480 | ops = rcu_dereference(inet_offloads[proto]); |
Vlad Yasevich | f191a1d | 2012-11-15 08:49:23 +0000 | [diff] [blame] | 1481 | if (WARN_ON(!ops || !ops->callbacks.gro_complete)) |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1482 | goto out_unlock; |
| 1483 | |
Jerry Chu | 299603e8 | 2013-12-11 20:53:45 -0800 | [diff] [blame] | 1484 | /* Only need to add sizeof(*iph) to get to the next hdr below |
| 1485 | * because any hdr with option will have been flushed in |
| 1486 | * inet_gro_receive(). |
| 1487 | */ |
| 1488 | err = ops->callbacks.gro_complete(skb, nhoff + sizeof(*iph)); |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1489 | |
| 1490 | out_unlock: |
| 1491 | rcu_read_unlock(); |
| 1492 | |
| 1493 | return err; |
| 1494 | } |
Tom Herbert | b8921ca | 2016-05-18 09:06:23 -0700 | [diff] [blame] | 1495 | EXPORT_SYMBOL(inet_gro_complete); |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1496 | |
Jesse Gross | b8cba75 | 2016-03-19 09:32:00 -0700 | [diff] [blame] | 1497 | static int ipip_gro_complete(struct sk_buff *skb, int nhoff) |
| 1498 | { |
| 1499 | skb->encapsulation = 1; |
Tom Herbert | 7e13318 | 2016-05-18 09:06:10 -0700 | [diff] [blame] | 1500 | skb_shinfo(skb)->gso_type |= SKB_GSO_IPXIP4; |
Jesse Gross | b8cba75 | 2016-03-19 09:32:00 -0700 | [diff] [blame] | 1501 | return inet_gro_complete(skb, nhoff); |
| 1502 | } |
| 1503 | |
Denis V. Lunev | eee4fe4 | 2008-04-03 14:27:58 -0700 | [diff] [blame] | 1504 | int inet_ctl_sock_create(struct sock **sk, unsigned short family, |
Denis V. Lunev | 5677242 | 2008-04-03 14:28:30 -0700 | [diff] [blame] | 1505 | unsigned short type, unsigned char protocol, |
| 1506 | struct net *net) |
Denis V. Lunev | 3d58b5f | 2008-04-03 14:22:32 -0700 | [diff] [blame] | 1507 | { |
Denis V. Lunev | eee4fe4 | 2008-04-03 14:27:58 -0700 | [diff] [blame] | 1508 | struct socket *sock; |
Eric W. Biederman | 26abe14 | 2015-05-08 21:10:31 -0500 | [diff] [blame] | 1509 | int rc = sock_create_kern(net, family, type, protocol, &sock); |
Denis V. Lunev | 3d58b5f | 2008-04-03 14:22:32 -0700 | [diff] [blame] | 1510 | |
| 1511 | if (rc == 0) { |
Denis V. Lunev | eee4fe4 | 2008-04-03 14:27:58 -0700 | [diff] [blame] | 1512 | *sk = sock->sk; |
| 1513 | (*sk)->sk_allocation = GFP_ATOMIC; |
Denis V. Lunev | 3d58b5f | 2008-04-03 14:22:32 -0700 | [diff] [blame] | 1514 | /* |
| 1515 | * Unhash it so that IP input processing does not even see it, |
| 1516 | * we do not wish this socket to see incoming packets. |
| 1517 | */ |
Denis V. Lunev | eee4fe4 | 2008-04-03 14:27:58 -0700 | [diff] [blame] | 1518 | (*sk)->sk_prot->unhash(*sk); |
Denis V. Lunev | 3d58b5f | 2008-04-03 14:22:32 -0700 | [diff] [blame] | 1519 | } |
| 1520 | return rc; |
| 1521 | } |
Denis V. Lunev | 3d58b5f | 2008-04-03 14:22:32 -0700 | [diff] [blame] | 1522 | EXPORT_SYMBOL_GPL(inet_ctl_sock_create); |
| 1523 | |
Raghavendra K T | c4c6bc3 | 2015-08-30 11:29:41 +0530 | [diff] [blame] | 1524 | u64 snmp_get_cpu_field(void __percpu *mib, int cpu, int offt) |
| 1525 | { |
| 1526 | return *(((unsigned long *)per_cpu_ptr(mib, cpu)) + offt); |
| 1527 | } |
| 1528 | EXPORT_SYMBOL_GPL(snmp_get_cpu_field); |
| 1529 | |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 1530 | unsigned long snmp_fold_field(void __percpu *mib, int offt) |
Herbert Xu | 5e0f043 | 2007-04-24 21:53:35 -0700 | [diff] [blame] | 1531 | { |
| 1532 | unsigned long res = 0; |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 1533 | int i; |
Herbert Xu | 5e0f043 | 2007-04-24 21:53:35 -0700 | [diff] [blame] | 1534 | |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 1535 | for_each_possible_cpu(i) |
Raghavendra K T | c4c6bc3 | 2015-08-30 11:29:41 +0530 | [diff] [blame] | 1536 | res += snmp_get_cpu_field(mib, i, offt); |
Herbert Xu | 5e0f043 | 2007-04-24 21:53:35 -0700 | [diff] [blame] | 1537 | return res; |
| 1538 | } |
| 1539 | EXPORT_SYMBOL_GPL(snmp_fold_field); |
| 1540 | |
Eric Dumazet | 4ce3c18 | 2010-06-30 13:31:19 -0700 | [diff] [blame] | 1541 | #if BITS_PER_LONG==32 |
| 1542 | |
David S. Miller | 80ec192 | 2015-08-30 22:40:44 -0700 | [diff] [blame] | 1543 | 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] | 1544 | size_t syncp_offset) |
| 1545 | { |
| 1546 | void *bhptr; |
| 1547 | struct u64_stats_sync *syncp; |
| 1548 | u64 v; |
| 1549 | unsigned int start; |
| 1550 | |
| 1551 | bhptr = per_cpu_ptr(mib, cpu); |
| 1552 | syncp = (struct u64_stats_sync *)(bhptr + syncp_offset); |
| 1553 | do { |
| 1554 | start = u64_stats_fetch_begin_irq(syncp); |
| 1555 | v = *(((u64 *)bhptr) + offt); |
| 1556 | } while (u64_stats_fetch_retry_irq(syncp, start)); |
| 1557 | |
| 1558 | return v; |
| 1559 | } |
| 1560 | EXPORT_SYMBOL_GPL(snmp_get_cpu_field64); |
| 1561 | |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 1562 | 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] | 1563 | { |
| 1564 | u64 res = 0; |
| 1565 | int cpu; |
| 1566 | |
| 1567 | for_each_possible_cpu(cpu) { |
Madalin Bucur | d1bfc62 | 2015-08-31 15:46:07 +0300 | [diff] [blame] | 1568 | res += snmp_get_cpu_field64(mib, cpu, offt, syncp_offset); |
Eric Dumazet | 4ce3c18 | 2010-06-30 13:31:19 -0700 | [diff] [blame] | 1569 | } |
| 1570 | return res; |
| 1571 | } |
| 1572 | EXPORT_SYMBOL_GPL(snmp_fold_field64); |
| 1573 | #endif |
| 1574 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1575 | #ifdef CONFIG_IP_MULTICAST |
Alexey Dobriyan | 3261309 | 2009-09-14 12:21:47 +0000 | [diff] [blame] | 1576 | static const struct net_protocol igmp_protocol = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1577 | .handler = igmp_rcv, |
Alexey Dobriyan | b4ee07d | 2008-12-25 16:42:23 -0800 | [diff] [blame] | 1578 | .netns_ok = 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1579 | }; |
| 1580 | #endif |
| 1581 | |
Alexey Dobriyan | 3261309 | 2009-09-14 12:21:47 +0000 | [diff] [blame] | 1582 | static const struct net_protocol tcp_protocol = { |
David S. Miller | 41063e9 | 2012-06-19 21:22:05 -0700 | [diff] [blame] | 1583 | .early_demux = tcp_v4_early_demux, |
| 1584 | .handler = tcp_v4_rcv, |
| 1585 | .err_handler = tcp_v4_err, |
David S. Miller | 41063e9 | 2012-06-19 21:22:05 -0700 | [diff] [blame] | 1586 | .no_policy = 1, |
| 1587 | .netns_ok = 1, |
Hannes Frederic Sowa | 8ed1dc4 | 2014-01-09 10:01:17 +0100 | [diff] [blame] | 1588 | .icmp_strict_tag_validation = 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1589 | }; |
| 1590 | |
Alexey Dobriyan | 3261309 | 2009-09-14 12:21:47 +0000 | [diff] [blame] | 1591 | static const struct net_protocol udp_protocol = { |
Shawn Bohrer | 421b388 | 2013-10-07 11:01:39 -0500 | [diff] [blame] | 1592 | .early_demux = udp_v4_early_demux, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1593 | .handler = udp_rcv, |
| 1594 | .err_handler = udp_err, |
| 1595 | .no_policy = 1, |
Denis V. Lunev | 92f1fec | 2008-03-24 15:34:06 -0700 | [diff] [blame] | 1596 | .netns_ok = 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1597 | }; |
| 1598 | |
Alexey Dobriyan | 3261309 | 2009-09-14 12:21:47 +0000 | [diff] [blame] | 1599 | static const struct net_protocol icmp_protocol = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1600 | .handler = icmp_rcv, |
Li Wei | 5b05204 | 2013-02-21 22:18:44 +0000 | [diff] [blame] | 1601 | .err_handler = icmp_err, |
Herbert Xu | 8b7817f | 2007-12-12 10:44:43 -0800 | [diff] [blame] | 1602 | .no_policy = 1, |
Denis V. Lunev | 92f1fec | 2008-03-24 15:34:06 -0700 | [diff] [blame] | 1603 | .netns_ok = 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1604 | }; |
| 1605 | |
Pavel Emelyanov | 9b4661b | 2008-07-18 04:01:44 -0700 | [diff] [blame] | 1606 | static __net_init int ipv4_mib_init_net(struct net *net) |
| 1607 | { |
John Stultz | 827da44 | 2013-10-07 15:51:58 -0700 | [diff] [blame] | 1608 | int i; |
| 1609 | |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 1610 | net->mib.tcp_statistics = alloc_percpu(struct tcp_mib); |
| 1611 | if (!net->mib.tcp_statistics) |
Pavel Emelyanov | 57ef42d | 2008-07-18 04:02:08 -0700 | [diff] [blame] | 1612 | goto err_tcp_mib; |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 1613 | net->mib.ip_statistics = alloc_percpu(struct ipstats_mib); |
| 1614 | if (!net->mib.ip_statistics) |
Pavel Emelyanov | a20f579 | 2008-07-18 04:02:42 -0700 | [diff] [blame] | 1615 | goto err_ip_mib; |
John Stultz | 827da44 | 2013-10-07 15:51:58 -0700 | [diff] [blame] | 1616 | |
| 1617 | for_each_possible_cpu(i) { |
| 1618 | struct ipstats_mib *af_inet_stats; |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 1619 | af_inet_stats = per_cpu_ptr(net->mib.ip_statistics, i); |
John Stultz | 827da44 | 2013-10-07 15:51:58 -0700 | [diff] [blame] | 1620 | u64_stats_init(&af_inet_stats->syncp); |
John Stultz | 827da44 | 2013-10-07 15:51:58 -0700 | [diff] [blame] | 1621 | } |
| 1622 | |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 1623 | net->mib.net_statistics = alloc_percpu(struct linux_mib); |
| 1624 | if (!net->mib.net_statistics) |
Pavel Emelyanov | 61a7e26 | 2008-07-18 04:03:08 -0700 | [diff] [blame] | 1625 | goto err_net_mib; |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 1626 | net->mib.udp_statistics = alloc_percpu(struct udp_mib); |
| 1627 | if (!net->mib.udp_statistics) |
Pavel Emelyanov | 2f275f9 | 2008-07-18 04:03:27 -0700 | [diff] [blame] | 1628 | goto err_udp_mib; |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 1629 | net->mib.udplite_statistics = alloc_percpu(struct udp_mib); |
| 1630 | if (!net->mib.udplite_statistics) |
Pavel Emelyanov | 386019d | 2008-07-18 04:03:45 -0700 | [diff] [blame] | 1631 | goto err_udplite_mib; |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 1632 | net->mib.icmp_statistics = alloc_percpu(struct icmp_mib); |
| 1633 | if (!net->mib.icmp_statistics) |
Pavel Emelyanov | b60538a | 2008-07-18 04:04:02 -0700 | [diff] [blame] | 1634 | goto err_icmp_mib; |
Eric Dumazet | acb32ba | 2011-11-08 13:04:43 +0000 | [diff] [blame] | 1635 | net->mib.icmpmsg_statistics = kzalloc(sizeof(struct icmpmsg_mib), |
| 1636 | GFP_KERNEL); |
| 1637 | if (!net->mib.icmpmsg_statistics) |
Pavel Emelyanov | 923c658 | 2008-07-18 04:04:22 -0700 | [diff] [blame] | 1638 | goto err_icmpmsg_mib; |
Pavel Emelyanov | 57ef42d | 2008-07-18 04:02:08 -0700 | [diff] [blame] | 1639 | |
| 1640 | tcp_mib_init(net); |
Pavel Emelyanov | 9b4661b | 2008-07-18 04:01:44 -0700 | [diff] [blame] | 1641 | return 0; |
Pavel Emelyanov | 57ef42d | 2008-07-18 04:02:08 -0700 | [diff] [blame] | 1642 | |
Pavel Emelyanov | 923c658 | 2008-07-18 04:04:22 -0700 | [diff] [blame] | 1643 | err_icmpmsg_mib: |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 1644 | free_percpu(net->mib.icmp_statistics); |
Pavel Emelyanov | b60538a | 2008-07-18 04:04:02 -0700 | [diff] [blame] | 1645 | err_icmp_mib: |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 1646 | free_percpu(net->mib.udplite_statistics); |
Pavel Emelyanov | 386019d | 2008-07-18 04:03:45 -0700 | [diff] [blame] | 1647 | err_udplite_mib: |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 1648 | free_percpu(net->mib.udp_statistics); |
Pavel Emelyanov | 2f275f9 | 2008-07-18 04:03:27 -0700 | [diff] [blame] | 1649 | err_udp_mib: |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 1650 | free_percpu(net->mib.net_statistics); |
Pavel Emelyanov | 61a7e26 | 2008-07-18 04:03:08 -0700 | [diff] [blame] | 1651 | err_net_mib: |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 1652 | free_percpu(net->mib.ip_statistics); |
Pavel Emelyanov | a20f579 | 2008-07-18 04:02:42 -0700 | [diff] [blame] | 1653 | err_ip_mib: |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 1654 | free_percpu(net->mib.tcp_statistics); |
Pavel Emelyanov | 57ef42d | 2008-07-18 04:02:08 -0700 | [diff] [blame] | 1655 | err_tcp_mib: |
| 1656 | return -ENOMEM; |
Pavel Emelyanov | 9b4661b | 2008-07-18 04:01:44 -0700 | [diff] [blame] | 1657 | } |
| 1658 | |
| 1659 | static __net_exit void ipv4_mib_exit_net(struct net *net) |
| 1660 | { |
Eric Dumazet | acb32ba | 2011-11-08 13:04:43 +0000 | [diff] [blame] | 1661 | kfree(net->mib.icmpmsg_statistics); |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 1662 | free_percpu(net->mib.icmp_statistics); |
| 1663 | free_percpu(net->mib.udplite_statistics); |
| 1664 | free_percpu(net->mib.udp_statistics); |
| 1665 | free_percpu(net->mib.net_statistics); |
| 1666 | free_percpu(net->mib.ip_statistics); |
| 1667 | free_percpu(net->mib.tcp_statistics); |
Pavel Emelyanov | 9b4661b | 2008-07-18 04:01:44 -0700 | [diff] [blame] | 1668 | } |
| 1669 | |
| 1670 | static __net_initdata struct pernet_operations ipv4_mib_ops = { |
| 1671 | .init = ipv4_mib_init_net, |
| 1672 | .exit = ipv4_mib_exit_net, |
| 1673 | }; |
| 1674 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1675 | static int __init init_ipv4_mibs(void) |
| 1676 | { |
Pavel Emelyanov | d89cbbb | 2008-07-18 04:04:51 -0700 | [diff] [blame] | 1677 | return register_pernet_subsys(&ipv4_mib_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1678 | } |
| 1679 | |
Cong Wang | c9d8f1a | 2014-05-06 11:02:49 -0700 | [diff] [blame] | 1680 | static __net_init int inet_init_net(struct net *net) |
| 1681 | { |
| 1682 | /* |
| 1683 | * Set defaults for local port range |
| 1684 | */ |
| 1685 | seqlock_init(&net->ipv4.ip_local_ports.lock); |
| 1686 | net->ipv4.ip_local_ports.range[0] = 32768; |
Eric Dumazet | 07f4c90 | 2015-05-24 14:49:35 -0700 | [diff] [blame] | 1687 | net->ipv4.ip_local_ports.range[1] = 60999; |
Cong Wang | ba6b918 | 2014-05-06 11:02:50 -0700 | [diff] [blame] | 1688 | |
| 1689 | seqlock_init(&net->ipv4.ping_group_range.lock); |
| 1690 | /* |
| 1691 | * Sane defaults - nobody may create ping sockets. |
| 1692 | * Boot scripts should set this to distro-specific group. |
| 1693 | */ |
| 1694 | net->ipv4.ping_group_range.range[0] = make_kgid(&init_user_ns, 1); |
| 1695 | 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] | 1696 | |
| 1697 | /* Default values for sysctl-controlled parameters. |
| 1698 | * We set them here, in case sysctl is not compiled. |
| 1699 | */ |
| 1700 | net->ipv4.sysctl_ip_default_ttl = IPDEFTTL; |
| 1701 | net->ipv4.sysctl_ip_dynaddr = 0; |
| 1702 | net->ipv4.sysctl_ip_early_demux = 1; |
| 1703 | |
Cong Wang | c9d8f1a | 2014-05-06 11:02:49 -0700 | [diff] [blame] | 1704 | return 0; |
| 1705 | } |
| 1706 | |
| 1707 | static __net_exit void inet_exit_net(struct net *net) |
| 1708 | { |
| 1709 | } |
| 1710 | |
| 1711 | static __net_initdata struct pernet_operations af_inet_ops = { |
| 1712 | .init = inet_init_net, |
| 1713 | .exit = inet_exit_net, |
| 1714 | }; |
| 1715 | |
| 1716 | static int __init init_inet_pernet_ops(void) |
| 1717 | { |
| 1718 | return register_pernet_subsys(&af_inet_ops); |
| 1719 | } |
| 1720 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1721 | static int ipv4_proc_init(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1722 | |
Herbert Xu | 30e224d | 2005-07-05 14:40:10 -0700 | [diff] [blame] | 1723 | /* |
| 1724 | * IP protocol layer initialiser |
| 1725 | */ |
| 1726 | |
Vlad Yasevich | 22061d8 | 2012-11-15 08:49:11 +0000 | [diff] [blame] | 1727 | static struct packet_offload ip_packet_offload __read_mostly = { |
| 1728 | .type = cpu_to_be16(ETH_P_IP), |
Vlad Yasevich | f191a1d | 2012-11-15 08:49:23 +0000 | [diff] [blame] | 1729 | .callbacks = { |
Vlad Yasevich | f191a1d | 2012-11-15 08:49:23 +0000 | [diff] [blame] | 1730 | .gso_segment = inet_gso_segment, |
| 1731 | .gro_receive = inet_gro_receive, |
| 1732 | .gro_complete = inet_gro_complete, |
| 1733 | }, |
Herbert Xu | 30e224d | 2005-07-05 14:40:10 -0700 | [diff] [blame] | 1734 | }; |
| 1735 | |
Eric Dumazet | cb32f51 | 2013-10-19 11:42:57 -0700 | [diff] [blame] | 1736 | static const struct net_offload ipip_offload = { |
| 1737 | .callbacks = { |
Eric Dumazet | cb32f51 | 2013-10-19 11:42:57 -0700 | [diff] [blame] | 1738 | .gso_segment = inet_gso_segment, |
Jesse Gross | fac8e0f | 2016-03-19 09:32:01 -0700 | [diff] [blame] | 1739 | .gro_receive = ipip_gro_receive, |
Jesse Gross | b8cba75 | 2016-03-19 09:32:00 -0700 | [diff] [blame] | 1740 | .gro_complete = ipip_gro_complete, |
Eric Dumazet | cb32f51 | 2013-10-19 11:42:57 -0700 | [diff] [blame] | 1741 | }, |
| 1742 | }; |
| 1743 | |
Vlad Yasevich | 808a8f8 | 2012-11-15 08:49:21 +0000 | [diff] [blame] | 1744 | static int __init ipv4_offload_init(void) |
| 1745 | { |
| 1746 | /* |
| 1747 | * Add offloads |
| 1748 | */ |
Daniel Borkmann | da5bab0 | 2013-06-08 12:56:03 +0200 | [diff] [blame] | 1749 | if (udpv4_offload_init() < 0) |
Vlad Yasevich | 808a8f8 | 2012-11-15 08:49:21 +0000 | [diff] [blame] | 1750 | pr_crit("%s: Cannot add UDP protocol offload\n", __func__); |
Daniel Borkmann | 28850dc | 2013-06-07 05:11:46 +0000 | [diff] [blame] | 1751 | if (tcpv4_offload_init() < 0) |
| 1752 | pr_crit("%s: Cannot add TCP protocol offload\n", __func__); |
Vlad Yasevich | 808a8f8 | 2012-11-15 08:49:21 +0000 | [diff] [blame] | 1753 | |
| 1754 | dev_add_offload(&ip_packet_offload); |
Eric Dumazet | cb32f51 | 2013-10-19 11:42:57 -0700 | [diff] [blame] | 1755 | inet_add_offload(&ipip_offload, IPPROTO_IPIP); |
Vlad Yasevich | 808a8f8 | 2012-11-15 08:49:21 +0000 | [diff] [blame] | 1756 | return 0; |
| 1757 | } |
| 1758 | |
| 1759 | fs_initcall(ipv4_offload_init); |
| 1760 | |
| 1761 | static struct packet_type ip_packet_type __read_mostly = { |
| 1762 | .type = cpu_to_be16(ETH_P_IP), |
| 1763 | .func = ip_rcv, |
| 1764 | }; |
| 1765 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1766 | static int __init inet_init(void) |
| 1767 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1768 | struct inet_protosw *q; |
| 1769 | struct list_head *r; |
| 1770 | int rc = -EINVAL; |
| 1771 | |
Eyal Birger | b4772ef | 2015-03-01 14:58:29 +0200 | [diff] [blame] | 1772 | sock_skb_cb_check_size(sizeof(struct inet_skb_parm)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1773 | |
| 1774 | rc = proto_register(&tcp_prot, 1); |
| 1775 | if (rc) |
WANG Cong | 122ff24 | 2014-05-12 16:04:53 -0700 | [diff] [blame] | 1776 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1777 | |
| 1778 | rc = proto_register(&udp_prot, 1); |
| 1779 | if (rc) |
| 1780 | goto out_unregister_tcp_proto; |
| 1781 | |
| 1782 | rc = proto_register(&raw_prot, 1); |
| 1783 | if (rc) |
| 1784 | goto out_unregister_udp_proto; |
| 1785 | |
Vasiliy Kulikov | c319b4d | 2011-05-13 10:01:00 +0000 | [diff] [blame] | 1786 | rc = proto_register(&ping_prot, 1); |
| 1787 | if (rc) |
| 1788 | goto out_unregister_raw_proto; |
| 1789 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1790 | /* |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1791 | * Tell SOCKET that we are alive... |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1792 | */ |
| 1793 | |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1794 | (void)sock_register(&inet_family_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1795 | |
Al Viro | bd7b153 | 2008-07-15 16:00:59 -0400 | [diff] [blame] | 1796 | #ifdef CONFIG_SYSCTL |
| 1797 | ip_static_sysctl_init(); |
| 1798 | #endif |
| 1799 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1800 | /* |
| 1801 | * Add all the base protocols. |
| 1802 | */ |
| 1803 | |
| 1804 | if (inet_add_protocol(&icmp_protocol, IPPROTO_ICMP) < 0) |
Joe Perches | 058bd4d | 2012-03-11 18:36:11 +0000 | [diff] [blame] | 1805 | pr_crit("%s: Cannot add ICMP protocol\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1806 | if (inet_add_protocol(&udp_protocol, IPPROTO_UDP) < 0) |
Joe Perches | 058bd4d | 2012-03-11 18:36:11 +0000 | [diff] [blame] | 1807 | pr_crit("%s: Cannot add UDP protocol\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1808 | if (inet_add_protocol(&tcp_protocol, IPPROTO_TCP) < 0) |
Joe Perches | 058bd4d | 2012-03-11 18:36:11 +0000 | [diff] [blame] | 1809 | pr_crit("%s: Cannot add TCP protocol\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1810 | #ifdef CONFIG_IP_MULTICAST |
| 1811 | if (inet_add_protocol(&igmp_protocol, IPPROTO_IGMP) < 0) |
Joe Perches | 058bd4d | 2012-03-11 18:36:11 +0000 | [diff] [blame] | 1812 | pr_crit("%s: Cannot add IGMP protocol\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1813 | #endif |
| 1814 | |
| 1815 | /* Register the socket-side information for inet_create. */ |
| 1816 | for (r = &inetsw[0]; r < &inetsw[SOCK_MAX]; ++r) |
| 1817 | INIT_LIST_HEAD(r); |
| 1818 | |
| 1819 | for (q = inetsw_array; q < &inetsw_array[INETSW_ARRAY_LEN]; ++q) |
| 1820 | inet_register_protosw(q); |
| 1821 | |
| 1822 | /* |
| 1823 | * Set the ARP module up |
| 1824 | */ |
| 1825 | |
| 1826 | arp_init(); |
| 1827 | |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1828 | /* |
| 1829 | * Set the IP module up |
| 1830 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1831 | |
| 1832 | ip_init(); |
| 1833 | |
Denis V. Lunev | 9b0f976 | 2008-02-29 11:13:15 -0800 | [diff] [blame] | 1834 | tcp_v4_init(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1835 | |
| 1836 | /* Setup TCP slab cache for open requests. */ |
| 1837 | tcp_init(); |
| 1838 | |
Hideo Aoki | 95766ff | 2007-12-31 00:29:24 -0800 | [diff] [blame] | 1839 | /* Setup UDP memory threshold */ |
| 1840 | udp_init(); |
| 1841 | |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 1842 | /* Add UDP-Lite (RFC 3828) */ |
| 1843 | udplite4_register(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1844 | |
Vasiliy Kulikov | c319b4d | 2011-05-13 10:01:00 +0000 | [diff] [blame] | 1845 | ping_init(); |
| 1846 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1847 | /* |
| 1848 | * Set the ICMP layer up |
| 1849 | */ |
| 1850 | |
Denis V. Lunev | a5710d6 | 2008-02-29 11:14:50 -0800 | [diff] [blame] | 1851 | if (icmp_init() < 0) |
| 1852 | panic("Failed to create the ICMP control socket.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1853 | |
| 1854 | /* |
| 1855 | * Initialise the multicast router |
| 1856 | */ |
| 1857 | #if defined(CONFIG_IP_MROUTE) |
Wang Chen | 03d2f89 | 2008-07-03 12:13:36 +0800 | [diff] [blame] | 1858 | if (ip_mr_init()) |
Joe Perches | 058bd4d | 2012-03-11 18:36:11 +0000 | [diff] [blame] | 1859 | pr_crit("%s: Cannot init ipv4 mroute\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1860 | #endif |
Cong Wang | c9d8f1a | 2014-05-06 11:02:49 -0700 | [diff] [blame] | 1861 | |
| 1862 | if (init_inet_pernet_ops()) |
| 1863 | pr_crit("%s: Cannot init ipv4 inet pernet ops\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1864 | /* |
| 1865 | * Initialise per-cpu ipv4 mibs |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1866 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1867 | |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1868 | if (init_ipv4_mibs()) |
Joe Perches | 058bd4d | 2012-03-11 18:36:11 +0000 | [diff] [blame] | 1869 | pr_crit("%s: Cannot init ipv4 mibs\n", __func__); |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1870 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1871 | ipv4_proc_init(); |
| 1872 | |
| 1873 | ipfrag_init(); |
| 1874 | |
Herbert Xu | 30e224d | 2005-07-05 14:40:10 -0700 | [diff] [blame] | 1875 | dev_add_pack(&ip_packet_type); |
| 1876 | |
Thomas Graf | 045a0fa | 2015-07-23 10:08:44 +0200 | [diff] [blame] | 1877 | ip_tunnel_core_init(); |
| 1878 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1879 | rc = 0; |
| 1880 | out: |
| 1881 | return rc; |
Vasiliy Kulikov | c319b4d | 2011-05-13 10:01:00 +0000 | [diff] [blame] | 1882 | out_unregister_raw_proto: |
| 1883 | proto_unregister(&raw_prot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1884 | out_unregister_udp_proto: |
| 1885 | proto_unregister(&udp_prot); |
Olaf Kirch | 321efff | 2006-09-27 16:33:45 -0700 | [diff] [blame] | 1886 | out_unregister_tcp_proto: |
| 1887 | proto_unregister(&tcp_prot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1888 | goto out; |
| 1889 | } |
| 1890 | |
Heiko Carstens | a536e07 | 2006-04-28 15:19:17 -0700 | [diff] [blame] | 1891 | fs_initcall(inet_init); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1892 | |
| 1893 | /* ------------------------------------------------------------------------ */ |
| 1894 | |
| 1895 | #ifdef CONFIG_PROC_FS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1896 | static int __init ipv4_proc_init(void) |
| 1897 | { |
| 1898 | int rc = 0; |
| 1899 | |
| 1900 | if (raw_proc_init()) |
| 1901 | goto out_raw; |
| 1902 | if (tcp4_proc_init()) |
| 1903 | goto out_tcp; |
| 1904 | if (udp4_proc_init()) |
| 1905 | goto out_udp; |
Vasiliy Kulikov | c319b4d | 2011-05-13 10:01:00 +0000 | [diff] [blame] | 1906 | if (ping_proc_init()) |
| 1907 | goto out_ping; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1908 | if (ip_misc_proc_init()) |
| 1909 | goto out_misc; |
| 1910 | out: |
| 1911 | return rc; |
| 1912 | out_misc: |
Vasiliy Kulikov | c319b4d | 2011-05-13 10:01:00 +0000 | [diff] [blame] | 1913 | ping_proc_exit(); |
| 1914 | out_ping: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1915 | udp4_proc_exit(); |
| 1916 | out_udp: |
| 1917 | tcp4_proc_exit(); |
| 1918 | out_tcp: |
| 1919 | raw_proc_exit(); |
| 1920 | out_raw: |
| 1921 | rc = -ENOMEM; |
| 1922 | goto out; |
| 1923 | } |
| 1924 | |
| 1925 | #else /* CONFIG_PROC_FS */ |
| 1926 | static int __init ipv4_proc_init(void) |
| 1927 | { |
| 1928 | return 0; |
| 1929 | } |
| 1930 | #endif /* CONFIG_PROC_FS */ |