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 | |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 68 | #include <linux/err.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | #include <linux/errno.h> |
| 70 | #include <linux/types.h> |
| 71 | #include <linux/socket.h> |
| 72 | #include <linux/in.h> |
| 73 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | #include <linux/module.h> |
| 75 | #include <linux/sched.h> |
| 76 | #include <linux/timer.h> |
| 77 | #include <linux/string.h> |
| 78 | #include <linux/sockios.h> |
| 79 | #include <linux/net.h> |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 80 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | #include <linux/fcntl.h> |
| 82 | #include <linux/mm.h> |
| 83 | #include <linux/interrupt.h> |
| 84 | #include <linux/stat.h> |
| 85 | #include <linux/init.h> |
| 86 | #include <linux/poll.h> |
| 87 | #include <linux/netfilter_ipv4.h> |
David S. Miller | b3da2cf | 2007-03-23 11:40:27 -0700 | [diff] [blame] | 88 | #include <linux/random.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 89 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | |
| 91 | #include <asm/uaccess.h> |
| 92 | #include <asm/system.h> |
| 93 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | #include <linux/inet.h> |
| 95 | #include <linux/igmp.h> |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 96 | #include <linux/inetdevice.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | #include <linux/netdevice.h> |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 98 | #include <net/checksum.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | #include <net/ip.h> |
| 100 | #include <net/protocol.h> |
| 101 | #include <net/arp.h> |
| 102 | #include <net/route.h> |
| 103 | #include <net/ip_fib.h> |
Arnaldo Carvalho de Melo | 295f732 | 2005-08-09 20:11:56 -0700 | [diff] [blame] | 104 | #include <net/inet_connection_sock.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | #include <net/tcp.h> |
| 106 | #include <net/udp.h> |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 107 | #include <net/udplite.h> |
Vasiliy Kulikov | c319b4d | 2011-05-13 10:01:00 +0000 | [diff] [blame] | 108 | #include <net/ping.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | #include <linux/skbuff.h> |
| 110 | #include <net/sock.h> |
| 111 | #include <net/raw.h> |
| 112 | #include <net/icmp.h> |
| 113 | #include <net/ipip.h> |
| 114 | #include <net/inet_common.h> |
| 115 | #include <net/xfrm.h> |
Pavel Emelyanov | 9b4661b | 2008-07-18 04:01:44 -0700 | [diff] [blame] | 116 | #include <net/net_namespace.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | #ifdef CONFIG_IP_MROUTE |
| 118 | #include <linux/mroute.h> |
| 119 | #endif |
| 120 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | |
| 122 | /* The inetsw table contains everything that inet_create needs to |
| 123 | * build a new socket. |
| 124 | */ |
| 125 | static struct list_head inetsw[SOCK_MAX]; |
| 126 | static DEFINE_SPINLOCK(inetsw_lock); |
| 127 | |
Pavel Emelyanov | 9ba6397 | 2007-12-05 01:38:23 -0800 | [diff] [blame] | 128 | struct ipv4_config ipv4_config; |
Pavel Emelyanov | 9ba6397 | 2007-12-05 01:38:23 -0800 | [diff] [blame] | 129 | EXPORT_SYMBOL(ipv4_config); |
| 130 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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)); |
Arnaldo Carvalho de Melo | e684897 | 2005-08-09 19:45:38 -0700 | [diff] [blame] | 159 | sk_refcnt_debug_dec(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 161 | EXPORT_SYMBOL(inet_sock_destruct); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | |
| 163 | /* |
| 164 | * The routines beyond this point handle the behaviour of an AF_INET |
| 165 | * socket object. Mostly it punts to the subprotocols of IP to do |
| 166 | * the work. |
| 167 | */ |
| 168 | |
| 169 | /* |
| 170 | * Automatically bind an unbound socket. |
| 171 | */ |
| 172 | |
| 173 | static int inet_autobind(struct sock *sk) |
| 174 | { |
| 175 | struct inet_sock *inet; |
| 176 | /* We may need to bind the socket. */ |
| 177 | lock_sock(sk); |
| 178 | inet = inet_sk(sk); |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 179 | if (!inet->inet_num) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | if (sk->sk_prot->get_port(sk, 0)) { |
| 181 | release_sock(sk); |
| 182 | return -EAGAIN; |
| 183 | } |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 184 | inet->inet_sport = htons(inet->inet_num); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | } |
| 186 | release_sock(sk); |
| 187 | return 0; |
| 188 | } |
| 189 | |
| 190 | /* |
| 191 | * Move a socket into listening state. |
| 192 | */ |
| 193 | int inet_listen(struct socket *sock, int backlog) |
| 194 | { |
| 195 | struct sock *sk = sock->sk; |
| 196 | unsigned char old_state; |
| 197 | int err; |
| 198 | |
| 199 | lock_sock(sk); |
| 200 | |
| 201 | err = -EINVAL; |
| 202 | if (sock->state != SS_UNCONNECTED || sock->type != SOCK_STREAM) |
| 203 | goto out; |
| 204 | |
| 205 | old_state = sk->sk_state; |
| 206 | if (!((1 << old_state) & (TCPF_CLOSE | TCPF_LISTEN))) |
| 207 | goto out; |
| 208 | |
| 209 | /* Really, if the socket is already in listen state |
| 210 | * we can only allow the backlog to be adjusted. |
| 211 | */ |
| 212 | if (old_state != TCP_LISTEN) { |
Eric Dumazet | 72a3eff | 2006-11-16 02:30:37 -0800 | [diff] [blame] | 213 | err = inet_csk_listen_start(sk, backlog); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | if (err) |
| 215 | goto out; |
| 216 | } |
| 217 | sk->sk_max_ack_backlog = backlog; |
| 218 | err = 0; |
| 219 | |
| 220 | out: |
| 221 | release_sock(sk); |
| 222 | return err; |
| 223 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 224 | EXPORT_SYMBOL(inet_listen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | |
Eric Dumazet | be77628 | 2007-03-27 13:53:04 -0700 | [diff] [blame] | 226 | u32 inet_ehash_secret __read_mostly; |
David S. Miller | b3da2cf | 2007-03-23 11:40:27 -0700 | [diff] [blame] | 227 | EXPORT_SYMBOL(inet_ehash_secret); |
| 228 | |
Eric Dumazet | be77628 | 2007-03-27 13:53:04 -0700 | [diff] [blame] | 229 | /* |
| 230 | * inet_ehash_secret must be set exactly once |
Eric Dumazet | be77628 | 2007-03-27 13:53:04 -0700 | [diff] [blame] | 231 | */ |
David S. Miller | b3da2cf | 2007-03-23 11:40:27 -0700 | [diff] [blame] | 232 | void build_ehash_secret(void) |
| 233 | { |
Eric Dumazet | be77628 | 2007-03-27 13:53:04 -0700 | [diff] [blame] | 234 | u32 rnd; |
Eric Dumazet | 49e8ab0 | 2010-08-19 06:10:45 +0000 | [diff] [blame] | 235 | |
Eric Dumazet | be77628 | 2007-03-27 13:53:04 -0700 | [diff] [blame] | 236 | do { |
| 237 | get_random_bytes(&rnd, sizeof(rnd)); |
| 238 | } while (rnd == 0); |
Eric Dumazet | 49e8ab0 | 2010-08-19 06:10:45 +0000 | [diff] [blame] | 239 | |
| 240 | cmpxchg(&inet_ehash_secret, 0, rnd); |
David S. Miller | b3da2cf | 2007-03-23 11:40:27 -0700 | [diff] [blame] | 241 | } |
| 242 | EXPORT_SYMBOL(build_ehash_secret); |
| 243 | |
Denis V. Lunev | 2342fd7 | 2008-03-24 15:33:42 -0700 | [diff] [blame] | 244 | static inline int inet_netns_ok(struct net *net, int protocol) |
| 245 | { |
| 246 | int hash; |
Alexey Dobriyan | 3261309 | 2009-09-14 12:21:47 +0000 | [diff] [blame] | 247 | const struct net_protocol *ipprot; |
Denis V. Lunev | 2342fd7 | 2008-03-24 15:33:42 -0700 | [diff] [blame] | 248 | |
Eric Dumazet | 04f258c | 2008-11-23 15:42:23 -0800 | [diff] [blame] | 249 | if (net_eq(net, &init_net)) |
Denis V. Lunev | 2342fd7 | 2008-03-24 15:33:42 -0700 | [diff] [blame] | 250 | return 1; |
| 251 | |
| 252 | hash = protocol & (MAX_INET_PROTOS - 1); |
| 253 | ipprot = rcu_dereference(inet_protos[hash]); |
| 254 | |
| 255 | if (ipprot == NULL) |
| 256 | /* raw IP is OK */ |
| 257 | return 1; |
| 258 | return ipprot->netns_ok; |
| 259 | } |
| 260 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | /* |
| 262 | * Create an inet socket. |
| 263 | */ |
| 264 | |
Eric Paris | 3f378b6 | 2009-11-05 22:18:14 -0800 | [diff] [blame] | 265 | static int inet_create(struct net *net, struct socket *sock, int protocol, |
| 266 | int kern) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | { |
| 268 | struct sock *sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | struct inet_protosw *answer; |
| 270 | struct inet_sock *inet; |
| 271 | struct proto *answer_prot; |
| 272 | unsigned char answer_flags; |
| 273 | char answer_no_check; |
Arnaldo Carvalho de Melo | bb97d31 | 2005-08-09 20:19:14 -0700 | [diff] [blame] | 274 | int try_loading_module = 0; |
Herbert Xu | 86c8f9d | 2005-12-02 20:43:26 -0800 | [diff] [blame] | 275 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | |
Eric Dumazet | 04f258c | 2008-11-23 15:42:23 -0800 | [diff] [blame] | 277 | if (unlikely(!inet_ehash_secret)) |
| 278 | if (sock->type != SOCK_RAW && sock->type != SOCK_DGRAM) |
| 279 | build_ehash_secret(); |
David S. Miller | b3da2cf | 2007-03-23 11:40:27 -0700 | [diff] [blame] | 280 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | sock->state = SS_UNCONNECTED; |
| 282 | |
| 283 | /* Look for the requested type/protocol pair. */ |
Arnaldo Carvalho de Melo | bb97d31 | 2005-08-09 20:19:14 -0700 | [diff] [blame] | 284 | lookup_protocol: |
Herbert Xu | 86c8f9d | 2005-12-02 20:43:26 -0800 | [diff] [blame] | 285 | err = -ESOCKTNOSUPPORT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | rcu_read_lock(); |
Paul E. McKenney | 696adfe | 2008-07-25 01:45:34 -0700 | [diff] [blame] | 287 | list_for_each_entry_rcu(answer, &inetsw[sock->type], list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | |
Paul E. McKenney | 696adfe | 2008-07-25 01:45:34 -0700 | [diff] [blame] | 289 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | /* Check the non-wild match. */ |
| 291 | if (protocol == answer->protocol) { |
| 292 | if (protocol != IPPROTO_IP) |
| 293 | break; |
| 294 | } else { |
| 295 | /* Check for the two wild cases. */ |
| 296 | if (IPPROTO_IP == protocol) { |
| 297 | protocol = answer->protocol; |
| 298 | break; |
| 299 | } |
| 300 | if (IPPROTO_IP == answer->protocol) |
| 301 | break; |
| 302 | } |
Herbert Xu | 86c8f9d | 2005-12-02 20:43:26 -0800 | [diff] [blame] | 303 | err = -EPROTONOSUPPORT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | } |
| 305 | |
Paul E. McKenney | 696adfe | 2008-07-25 01:45:34 -0700 | [diff] [blame] | 306 | if (unlikely(err)) { |
Arnaldo Carvalho de Melo | bb97d31 | 2005-08-09 20:19:14 -0700 | [diff] [blame] | 307 | if (try_loading_module < 2) { |
| 308 | rcu_read_unlock(); |
| 309 | /* |
| 310 | * Be more specific, e.g. net-pf-2-proto-132-type-1 |
| 311 | * (net-pf-PF_INET-proto-IPPROTO_SCTP-type-SOCK_STREAM) |
| 312 | */ |
| 313 | if (++try_loading_module == 1) |
| 314 | request_module("net-pf-%d-proto-%d-type-%d", |
| 315 | PF_INET, protocol, sock->type); |
| 316 | /* |
| 317 | * Fall back to generic, e.g. net-pf-2-proto-132 |
| 318 | * (net-pf-PF_INET-proto-IPPROTO_SCTP) |
| 319 | */ |
| 320 | else |
| 321 | request_module("net-pf-%d-proto-%d", |
| 322 | PF_INET, protocol); |
| 323 | goto lookup_protocol; |
| 324 | } else |
| 325 | goto out_rcu_unlock; |
| 326 | } |
| 327 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | err = -EPERM; |
Eric Paris | c84b326 | 2009-11-05 20:45:52 -0800 | [diff] [blame] | 329 | if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | goto out_rcu_unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | |
Denis V. Lunev | 2342fd7 | 2008-03-24 15:33:42 -0700 | [diff] [blame] | 332 | err = -EAFNOSUPPORT; |
| 333 | if (!inet_netns_ok(net, protocol)) |
| 334 | goto out_rcu_unlock; |
| 335 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | sock->ops = answer->ops; |
| 337 | answer_prot = answer->prot; |
| 338 | answer_no_check = answer->no_check; |
| 339 | answer_flags = answer->flags; |
| 340 | rcu_read_unlock(); |
| 341 | |
Ilpo Järvinen | 547b792 | 2008-07-25 21:43:18 -0700 | [diff] [blame] | 342 | WARN_ON(answer_prot->slab == NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | |
| 344 | err = -ENOBUFS; |
Pavel Emelyanov | 6257ff2 | 2007-11-01 00:39:31 -0700 | [diff] [blame] | 345 | sk = sk_alloc(net, PF_INET, GFP_KERNEL, answer_prot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | if (sk == NULL) |
| 347 | goto out; |
| 348 | |
| 349 | err = 0; |
| 350 | sk->sk_no_check = answer_no_check; |
| 351 | if (INET_PROTOSW_REUSE & answer_flags) |
| 352 | sk->sk_reuse = 1; |
| 353 | |
| 354 | inet = inet_sk(sk); |
Paul Moore | 469de9b | 2007-01-09 14:37:06 -0800 | [diff] [blame] | 355 | inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | |
Jiri Olsa | 7b2ff18 | 2010-06-15 01:07:31 +0000 | [diff] [blame] | 357 | inet->nodefrag = 0; |
| 358 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | if (SOCK_RAW == sock->type) { |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 360 | inet->inet_num = protocol; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | if (IPPROTO_RAW == protocol) |
| 362 | inet->hdrincl = 1; |
| 363 | } |
| 364 | |
| 365 | if (ipv4_config.no_pmtu_disc) |
| 366 | inet->pmtudisc = IP_PMTUDISC_DONT; |
| 367 | else |
| 368 | inet->pmtudisc = IP_PMTUDISC_WANT; |
| 369 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 370 | inet->inet_id = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | |
| 372 | sock_init_data(sock, sk); |
| 373 | |
| 374 | sk->sk_destruct = inet_sock_destruct; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | sk->sk_protocol = protocol; |
| 376 | sk->sk_backlog_rcv = sk->sk_prot->backlog_rcv; |
| 377 | |
| 378 | inet->uc_ttl = -1; |
| 379 | inet->mc_loop = 1; |
| 380 | inet->mc_ttl = 1; |
Nivedita Singhvi | f771bef | 2009-05-28 07:00:46 +0000 | [diff] [blame] | 381 | inet->mc_all = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | inet->mc_index = 0; |
| 383 | inet->mc_list = NULL; |
| 384 | |
Arnaldo Carvalho de Melo | e684897 | 2005-08-09 19:45:38 -0700 | [diff] [blame] | 385 | sk_refcnt_debug_inc(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 387 | if (inet->inet_num) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | /* It assumes that any protocol which allows |
| 389 | * the user to assign a number at socket |
| 390 | * creation time automatically |
| 391 | * shares. |
| 392 | */ |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 393 | inet->inet_sport = htons(inet->inet_num); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | /* Add to protocol hash chains. */ |
| 395 | sk->sk_prot->hash(sk); |
| 396 | } |
| 397 | |
| 398 | if (sk->sk_prot->init) { |
| 399 | err = sk->sk_prot->init(sk); |
| 400 | if (err) |
| 401 | sk_common_release(sk); |
| 402 | } |
| 403 | out: |
| 404 | return err; |
| 405 | out_rcu_unlock: |
| 406 | rcu_read_unlock(); |
| 407 | goto out; |
| 408 | } |
| 409 | |
| 410 | |
| 411 | /* |
| 412 | * The peer socket should always be NULL (or else). When we call this |
| 413 | * function we are destroying the object and from then on nobody |
| 414 | * should refer to it. |
| 415 | */ |
| 416 | int inet_release(struct socket *sock) |
| 417 | { |
| 418 | struct sock *sk = sock->sk; |
| 419 | |
| 420 | if (sk) { |
| 421 | long timeout; |
| 422 | |
David S. Miller | c58dc01 | 2010-04-27 15:05:31 -0700 | [diff] [blame] | 423 | sock_rps_reset_flow(sk); |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 424 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | /* Applications forget to leave groups before exiting */ |
| 426 | ip_mc_drop_socket(sk); |
| 427 | |
| 428 | /* If linger is set, we don't return until the close |
| 429 | * is complete. Otherwise we return immediately. The |
| 430 | * actually closing is done the same either way. |
| 431 | * |
| 432 | * If the close is due to the process exiting, we never |
| 433 | * linger.. |
| 434 | */ |
| 435 | timeout = 0; |
| 436 | if (sock_flag(sk, SOCK_LINGER) && |
| 437 | !(current->flags & PF_EXITING)) |
| 438 | timeout = sk->sk_lingertime; |
| 439 | sock->sk = NULL; |
| 440 | sk->sk_prot->close(sk, timeout); |
| 441 | } |
| 442 | return 0; |
| 443 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 444 | EXPORT_SYMBOL(inet_release); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | |
| 446 | /* It is off by default, see below. */ |
Brian Haley | ab32ea5 | 2006-09-22 14:15:41 -0700 | [diff] [blame] | 447 | int sysctl_ip_nonlocal_bind __read_mostly; |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 448 | EXPORT_SYMBOL(sysctl_ip_nonlocal_bind); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | |
| 450 | int inet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) |
| 451 | { |
| 452 | struct sockaddr_in *addr = (struct sockaddr_in *)uaddr; |
| 453 | struct sock *sk = sock->sk; |
| 454 | struct inet_sock *inet = inet_sk(sk); |
| 455 | unsigned short snum; |
| 456 | int chk_addr_ret; |
| 457 | int err; |
| 458 | |
| 459 | /* If the socket has its own bind function then use it. (RAW) */ |
| 460 | if (sk->sk_prot->bind) { |
| 461 | err = sk->sk_prot->bind(sk, uaddr, addr_len); |
| 462 | goto out; |
| 463 | } |
| 464 | err = -EINVAL; |
| 465 | if (addr_len < sizeof(struct sockaddr_in)) |
| 466 | goto out; |
| 467 | |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 468 | chk_addr_ret = inet_addr_type(sock_net(sk), addr->sin_addr.s_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | |
| 470 | /* Not specified by any standard per-se, however it breaks too |
| 471 | * many applications when removed. It is unfortunate since |
| 472 | * allowing applications to make a non-local bind solves |
| 473 | * several problems with systems using dynamic addressing. |
| 474 | * (ie. your servers still start up even if your ISDN link |
| 475 | * is temporarily down) |
| 476 | */ |
| 477 | err = -EADDRNOTAVAIL; |
| 478 | if (!sysctl_ip_nonlocal_bind && |
Tóth László Attila | b9fb150 | 2008-10-01 07:31:24 -0700 | [diff] [blame] | 479 | !(inet->freebind || inet->transparent) && |
Al Viro | e6f1ceb | 2008-03-17 22:44:53 -0700 | [diff] [blame] | 480 | addr->sin_addr.s_addr != htonl(INADDR_ANY) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | chk_addr_ret != RTN_LOCAL && |
| 482 | chk_addr_ret != RTN_MULTICAST && |
| 483 | chk_addr_ret != RTN_BROADCAST) |
| 484 | goto out; |
| 485 | |
| 486 | snum = ntohs(addr->sin_port); |
| 487 | err = -EACCES; |
| 488 | if (snum && snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) |
| 489 | goto out; |
| 490 | |
| 491 | /* We keep a pair of addresses. rcv_saddr is the one |
| 492 | * used by hash lookups, and saddr is used for transmit. |
| 493 | * |
| 494 | * In the BSD API these are the same except where it |
| 495 | * would be illegal to use them (multicast/broadcast) in |
| 496 | * which case the sending device address is used. |
| 497 | */ |
| 498 | lock_sock(sk); |
| 499 | |
| 500 | /* Check these errors (active socket, double bind). */ |
| 501 | err = -EINVAL; |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 502 | if (sk->sk_state != TCP_CLOSE || inet->inet_num) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | goto out_release_sock; |
| 504 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 505 | inet->inet_rcv_saddr = inet->inet_saddr = addr->sin_addr.s_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST) |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 507 | inet->inet_saddr = 0; /* Use device */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | |
| 509 | /* Make sure we are allowed to bind here. */ |
| 510 | if (sk->sk_prot->get_port(sk, snum)) { |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 511 | inet->inet_saddr = inet->inet_rcv_saddr = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | err = -EADDRINUSE; |
| 513 | goto out_release_sock; |
| 514 | } |
| 515 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 516 | if (inet->inet_rcv_saddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | sk->sk_userlocks |= SOCK_BINDADDR_LOCK; |
| 518 | if (snum) |
| 519 | sk->sk_userlocks |= SOCK_BINDPORT_LOCK; |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 520 | inet->inet_sport = htons(inet->inet_num); |
| 521 | inet->inet_daddr = 0; |
| 522 | inet->inet_dport = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | sk_dst_reset(sk); |
| 524 | err = 0; |
| 525 | out_release_sock: |
| 526 | release_sock(sk); |
| 527 | out: |
| 528 | return err; |
| 529 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 530 | EXPORT_SYMBOL(inet_bind); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | |
| 532 | int inet_dgram_connect(struct socket *sock, struct sockaddr * uaddr, |
| 533 | int addr_len, int flags) |
| 534 | { |
| 535 | struct sock *sk = sock->sk; |
| 536 | |
Changli Gao | 6503d96 | 2010-03-31 22:58:26 +0000 | [diff] [blame] | 537 | if (addr_len < sizeof(uaddr->sa_family)) |
| 538 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | if (uaddr->sa_family == AF_UNSPEC) |
| 540 | return sk->sk_prot->disconnect(sk, flags); |
| 541 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 542 | if (!inet_sk(sk)->inet_num && inet_autobind(sk)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | return -EAGAIN; |
| 544 | return sk->sk_prot->connect(sk, (struct sockaddr *)uaddr, addr_len); |
| 545 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 546 | EXPORT_SYMBOL(inet_dgram_connect); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | |
| 548 | static long inet_wait_for_connect(struct sock *sk, long timeo) |
| 549 | { |
| 550 | DEFINE_WAIT(wait); |
| 551 | |
Eric Dumazet | aa39514 | 2010-04-20 13:03:51 +0000 | [diff] [blame] | 552 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | |
| 554 | /* Basic assumption: if someone sets sk->sk_err, he _must_ |
| 555 | * change state of the socket from TCP_SYN_*. |
| 556 | * Connect() does not allow to get error notifications |
| 557 | * without closing the socket. |
| 558 | */ |
| 559 | while ((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV)) { |
| 560 | release_sock(sk); |
| 561 | timeo = schedule_timeout(timeo); |
| 562 | lock_sock(sk); |
| 563 | if (signal_pending(current) || !timeo) |
| 564 | break; |
Eric Dumazet | aa39514 | 2010-04-20 13:03:51 +0000 | [diff] [blame] | 565 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | } |
Eric Dumazet | aa39514 | 2010-04-20 13:03:51 +0000 | [diff] [blame] | 567 | finish_wait(sk_sleep(sk), &wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | return timeo; |
| 569 | } |
| 570 | |
| 571 | /* |
| 572 | * Connect to a remote host. There is regrettably still a little |
| 573 | * TCP 'magic' in here. |
| 574 | */ |
| 575 | int inet_stream_connect(struct socket *sock, struct sockaddr *uaddr, |
| 576 | int addr_len, int flags) |
| 577 | { |
| 578 | struct sock *sk = sock->sk; |
| 579 | int err; |
| 580 | long timeo; |
| 581 | |
Changli Gao | 6503d96 | 2010-03-31 22:58:26 +0000 | [diff] [blame] | 582 | if (addr_len < sizeof(uaddr->sa_family)) |
| 583 | return -EINVAL; |
| 584 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | lock_sock(sk); |
| 586 | |
| 587 | if (uaddr->sa_family == AF_UNSPEC) { |
| 588 | err = sk->sk_prot->disconnect(sk, flags); |
| 589 | sock->state = err ? SS_DISCONNECTING : SS_UNCONNECTED; |
| 590 | goto out; |
| 591 | } |
| 592 | |
| 593 | switch (sock->state) { |
| 594 | default: |
| 595 | err = -EINVAL; |
| 596 | goto out; |
| 597 | case SS_CONNECTED: |
| 598 | err = -EISCONN; |
| 599 | goto out; |
| 600 | case SS_CONNECTING: |
| 601 | err = -EALREADY; |
| 602 | /* Fall out of switch with err, set for this state */ |
| 603 | break; |
| 604 | case SS_UNCONNECTED: |
| 605 | err = -EISCONN; |
| 606 | if (sk->sk_state != TCP_CLOSE) |
| 607 | goto out; |
| 608 | |
| 609 | err = sk->sk_prot->connect(sk, uaddr, addr_len); |
| 610 | if (err < 0) |
| 611 | goto out; |
| 612 | |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 613 | sock->state = SS_CONNECTING; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | |
| 615 | /* Just entered SS_CONNECTING state; the only |
| 616 | * difference is that return value in non-blocking |
| 617 | * case is EINPROGRESS, rather than EALREADY. |
| 618 | */ |
| 619 | err = -EINPROGRESS; |
| 620 | break; |
| 621 | } |
| 622 | |
| 623 | timeo = sock_sndtimeo(sk, flags & O_NONBLOCK); |
| 624 | |
| 625 | if ((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV)) { |
| 626 | /* Error code is set above */ |
| 627 | if (!timeo || !inet_wait_for_connect(sk, timeo)) |
| 628 | goto out; |
| 629 | |
| 630 | err = sock_intr_errno(timeo); |
| 631 | if (signal_pending(current)) |
| 632 | goto out; |
| 633 | } |
| 634 | |
| 635 | /* Connection was closed by RST, timeout, ICMP error |
| 636 | * or another process disconnected us. |
| 637 | */ |
| 638 | if (sk->sk_state == TCP_CLOSE) |
| 639 | goto sock_error; |
| 640 | |
| 641 | /* sk->sk_err may be not zero now, if RECVERR was ordered by user |
| 642 | * and error was received after socket entered established state. |
| 643 | * Hence, it is handled normally after connect() return successfully. |
| 644 | */ |
| 645 | |
| 646 | sock->state = SS_CONNECTED; |
| 647 | err = 0; |
| 648 | out: |
| 649 | release_sock(sk); |
| 650 | return err; |
| 651 | |
| 652 | sock_error: |
| 653 | err = sock_error(sk) ? : -ECONNABORTED; |
| 654 | sock->state = SS_UNCONNECTED; |
| 655 | if (sk->sk_prot->disconnect(sk, flags)) |
| 656 | sock->state = SS_DISCONNECTING; |
| 657 | goto out; |
| 658 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 659 | EXPORT_SYMBOL(inet_stream_connect); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | |
| 661 | /* |
| 662 | * Accept a pending connection. The TCP layer now gives BSD semantics. |
| 663 | */ |
| 664 | |
| 665 | int inet_accept(struct socket *sock, struct socket *newsock, int flags) |
| 666 | { |
| 667 | struct sock *sk1 = sock->sk; |
| 668 | int err = -EINVAL; |
| 669 | struct sock *sk2 = sk1->sk_prot->accept(sk1, flags, &err); |
| 670 | |
| 671 | if (!sk2) |
| 672 | goto do_err; |
| 673 | |
| 674 | lock_sock(sk2); |
| 675 | |
Ilpo Järvinen | 547b792 | 2008-07-25 21:43:18 -0700 | [diff] [blame] | 676 | WARN_ON(!((1 << sk2->sk_state) & |
| 677 | (TCPF_ESTABLISHED | TCPF_CLOSE_WAIT | TCPF_CLOSE))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | |
| 679 | sock_graft(sk2, newsock); |
| 680 | |
| 681 | newsock->state = SS_CONNECTED; |
| 682 | err = 0; |
| 683 | release_sock(sk2); |
| 684 | do_err: |
| 685 | return err; |
| 686 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 687 | EXPORT_SYMBOL(inet_accept); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | |
| 689 | |
| 690 | /* |
| 691 | * This does both peername and sockname. |
| 692 | */ |
| 693 | int inet_getname(struct socket *sock, struct sockaddr *uaddr, |
| 694 | int *uaddr_len, int peer) |
| 695 | { |
| 696 | struct sock *sk = sock->sk; |
| 697 | struct inet_sock *inet = inet_sk(sk); |
Cyrill Gorcunov | 38bfd8f | 2009-10-29 02:59:18 -0700 | [diff] [blame] | 698 | DECLARE_SOCKADDR(struct sockaddr_in *, sin, uaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 699 | |
| 700 | sin->sin_family = AF_INET; |
| 701 | if (peer) { |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 702 | if (!inet->inet_dport || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) && |
| 704 | peer == 1)) |
| 705 | return -ENOTCONN; |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 706 | sin->sin_port = inet->inet_dport; |
| 707 | sin->sin_addr.s_addr = inet->inet_daddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | } else { |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 709 | __be32 addr = inet->inet_rcv_saddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | if (!addr) |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 711 | addr = inet->inet_saddr; |
| 712 | sin->sin_port = inet->inet_sport; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | sin->sin_addr.s_addr = addr; |
| 714 | } |
| 715 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); |
| 716 | *uaddr_len = sizeof(*sin); |
| 717 | return 0; |
| 718 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 719 | EXPORT_SYMBOL(inet_getname); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | |
| 721 | int inet_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, |
| 722 | size_t size) |
| 723 | { |
| 724 | struct sock *sk = sock->sk; |
| 725 | |
David S. Miller | c58dc01 | 2010-04-27 15:05:31 -0700 | [diff] [blame] | 726 | sock_rps_record_flow(sk); |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 727 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | /* We may need to bind the socket. */ |
Changli Gao | 7ba4291 | 2010-07-10 20:41:55 +0000 | [diff] [blame] | 729 | if (!inet_sk(sk)->inet_num && !sk->sk_prot->no_autobind && |
| 730 | inet_autobind(sk)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | return -EAGAIN; |
| 732 | |
| 733 | return sk->sk_prot->sendmsg(iocb, sk, msg, size); |
| 734 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 735 | EXPORT_SYMBOL(inet_sendmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | |
Changli Gao | 7ba4291 | 2010-07-10 20:41:55 +0000 | [diff] [blame] | 737 | ssize_t inet_sendpage(struct socket *sock, struct page *page, int offset, |
| 738 | size_t size, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | { |
| 740 | struct sock *sk = sock->sk; |
| 741 | |
David S. Miller | c58dc01 | 2010-04-27 15:05:31 -0700 | [diff] [blame] | 742 | sock_rps_record_flow(sk); |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 743 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | /* We may need to bind the socket. */ |
Changli Gao | 7ba4291 | 2010-07-10 20:41:55 +0000 | [diff] [blame] | 745 | if (!inet_sk(sk)->inet_num && !sk->sk_prot->no_autobind && |
| 746 | inet_autobind(sk)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | return -EAGAIN; |
| 748 | |
| 749 | if (sk->sk_prot->sendpage) |
| 750 | return sk->sk_prot->sendpage(sk, page, offset, size, flags); |
| 751 | return sock_no_sendpage(sock, page, offset, size, flags); |
| 752 | } |
Changli Gao | 7ba4291 | 2010-07-10 20:41:55 +0000 | [diff] [blame] | 753 | EXPORT_SYMBOL(inet_sendpage); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 755 | int inet_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, |
| 756 | size_t size, int flags) |
| 757 | { |
| 758 | struct sock *sk = sock->sk; |
| 759 | int addr_len = 0; |
| 760 | int err; |
| 761 | |
David S. Miller | c58dc01 | 2010-04-27 15:05:31 -0700 | [diff] [blame] | 762 | sock_rps_record_flow(sk); |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 763 | |
| 764 | err = sk->sk_prot->recvmsg(iocb, sk, msg, size, flags & MSG_DONTWAIT, |
| 765 | flags & ~MSG_DONTWAIT, &addr_len); |
| 766 | if (err >= 0) |
| 767 | msg->msg_namelen = addr_len; |
| 768 | return err; |
| 769 | } |
| 770 | EXPORT_SYMBOL(inet_recvmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 771 | |
| 772 | int inet_shutdown(struct socket *sock, int how) |
| 773 | { |
| 774 | struct sock *sk = sock->sk; |
| 775 | int err = 0; |
| 776 | |
| 777 | /* This should really check to make sure |
| 778 | * the socket is a TCP socket. (WHY AC...) |
| 779 | */ |
| 780 | how++; /* maps 0->1 has the advantage of making bit 1 rcvs and |
| 781 | 1->2 bit 2 snds. |
| 782 | 2->3 */ |
| 783 | if ((how & ~SHUTDOWN_MASK) || !how) /* MAXINT->0 */ |
| 784 | return -EINVAL; |
| 785 | |
| 786 | lock_sock(sk); |
| 787 | if (sock->state == SS_CONNECTING) { |
| 788 | if ((1 << sk->sk_state) & |
| 789 | (TCPF_SYN_SENT | TCPF_SYN_RECV | TCPF_CLOSE)) |
| 790 | sock->state = SS_DISCONNECTING; |
| 791 | else |
| 792 | sock->state = SS_CONNECTED; |
| 793 | } |
| 794 | |
| 795 | switch (sk->sk_state) { |
| 796 | case TCP_CLOSE: |
| 797 | err = -ENOTCONN; |
| 798 | /* Hack to wake up other listeners, who can poll for |
| 799 | POLLHUP, even on eg. unconnected UDP sockets -- RR */ |
| 800 | default: |
| 801 | sk->sk_shutdown |= how; |
| 802 | if (sk->sk_prot->shutdown) |
| 803 | sk->sk_prot->shutdown(sk, how); |
| 804 | break; |
| 805 | |
| 806 | /* Remaining two branches are temporary solution for missing |
| 807 | * close() in multithreaded environment. It is _not_ a good idea, |
| 808 | * but we have no choice until close() is repaired at VFS level. |
| 809 | */ |
| 810 | case TCP_LISTEN: |
| 811 | if (!(how & RCV_SHUTDOWN)) |
| 812 | break; |
| 813 | /* Fall through */ |
| 814 | case TCP_SYN_SENT: |
| 815 | err = sk->sk_prot->disconnect(sk, O_NONBLOCK); |
| 816 | sock->state = err ? SS_DISCONNECTING : SS_UNCONNECTED; |
| 817 | break; |
| 818 | } |
| 819 | |
| 820 | /* Wake up anyone sleeping in poll. */ |
| 821 | sk->sk_state_change(sk); |
| 822 | release_sock(sk); |
| 823 | return err; |
| 824 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 825 | EXPORT_SYMBOL(inet_shutdown); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 826 | |
| 827 | /* |
| 828 | * ioctl() calls you can issue on an INET socket. Most of these are |
| 829 | * device configuration and stuff and very rarely used. Some ioctls |
| 830 | * pass on to the socket itself. |
| 831 | * |
| 832 | * NOTE: I like the idea of a module for the config stuff. ie ifconfig |
| 833 | * loads the devconfigure module does its configuring and unloads it. |
| 834 | * There's a good 20K of config code hanging around the kernel. |
| 835 | */ |
| 836 | |
| 837 | int inet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
| 838 | { |
| 839 | struct sock *sk = sock->sk; |
| 840 | int err = 0; |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 841 | struct net *net = sock_net(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 842 | |
| 843 | switch (cmd) { |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 844 | case SIOCGSTAMP: |
| 845 | err = sock_get_timestamp(sk, (struct timeval __user *)arg); |
| 846 | break; |
| 847 | case SIOCGSTAMPNS: |
| 848 | err = sock_get_timestampns(sk, (struct timespec __user *)arg); |
| 849 | break; |
| 850 | case SIOCADDRT: |
| 851 | case SIOCDELRT: |
| 852 | case SIOCRTMSG: |
| 853 | err = ip_rt_ioctl(net, cmd, (void __user *)arg); |
| 854 | break; |
| 855 | case SIOCDARP: |
| 856 | case SIOCGARP: |
| 857 | case SIOCSARP: |
| 858 | err = arp_ioctl(net, cmd, (void __user *)arg); |
| 859 | break; |
| 860 | case SIOCGIFADDR: |
| 861 | case SIOCSIFADDR: |
| 862 | case SIOCGIFBRDADDR: |
| 863 | case SIOCSIFBRDADDR: |
| 864 | case SIOCGIFNETMASK: |
| 865 | case SIOCSIFNETMASK: |
| 866 | case SIOCGIFDSTADDR: |
| 867 | case SIOCSIFDSTADDR: |
| 868 | case SIOCSIFPFLAGS: |
| 869 | case SIOCGIFPFLAGS: |
| 870 | case SIOCSIFFLAGS: |
| 871 | err = devinet_ioctl(net, cmd, (void __user *)arg); |
| 872 | break; |
| 873 | default: |
| 874 | if (sk->sk_prot->ioctl) |
| 875 | err = sk->sk_prot->ioctl(sk, cmd, arg); |
| 876 | else |
| 877 | err = -ENOIOCTLCMD; |
| 878 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 879 | } |
| 880 | return err; |
| 881 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 882 | EXPORT_SYMBOL(inet_ioctl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 883 | |
Eric W. Biederman | 709b46e | 2011-01-29 16:15:56 +0000 | [diff] [blame] | 884 | #ifdef CONFIG_COMPAT |
| 885 | int inet_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
| 886 | { |
| 887 | struct sock *sk = sock->sk; |
| 888 | int err = -ENOIOCTLCMD; |
| 889 | |
| 890 | if (sk->sk_prot->compat_ioctl) |
| 891 | err = sk->sk_prot->compat_ioctl(sk, cmd, arg); |
| 892 | |
| 893 | return err; |
| 894 | } |
| 895 | #endif |
| 896 | |
Eric Dumazet | 90ddc4f | 2005-12-22 12:49:22 -0800 | [diff] [blame] | 897 | const struct proto_ops inet_stream_ops = { |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 898 | .family = PF_INET, |
| 899 | .owner = THIS_MODULE, |
| 900 | .release = inet_release, |
| 901 | .bind = inet_bind, |
| 902 | .connect = inet_stream_connect, |
| 903 | .socketpair = sock_no_socketpair, |
| 904 | .accept = inet_accept, |
| 905 | .getname = inet_getname, |
| 906 | .poll = tcp_poll, |
| 907 | .ioctl = inet_ioctl, |
| 908 | .listen = inet_listen, |
| 909 | .shutdown = inet_shutdown, |
| 910 | .setsockopt = sock_common_setsockopt, |
| 911 | .getsockopt = sock_common_getsockopt, |
Changli Gao | 7ba4291 | 2010-07-10 20:41:55 +0000 | [diff] [blame] | 912 | .sendmsg = inet_sendmsg, |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 913 | .recvmsg = inet_recvmsg, |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 914 | .mmap = sock_no_mmap, |
Changli Gao | 7ba4291 | 2010-07-10 20:41:55 +0000 | [diff] [blame] | 915 | .sendpage = inet_sendpage, |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 916 | .splice_read = tcp_splice_read, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 917 | #ifdef CONFIG_COMPAT |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 918 | .compat_setsockopt = compat_sock_common_setsockopt, |
| 919 | .compat_getsockopt = compat_sock_common_getsockopt, |
Eric W. Biederman | 709b46e | 2011-01-29 16:15:56 +0000 | [diff] [blame] | 920 | .compat_ioctl = inet_compat_ioctl, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 921 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 922 | }; |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 923 | EXPORT_SYMBOL(inet_stream_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 924 | |
Eric Dumazet | 90ddc4f | 2005-12-22 12:49:22 -0800 | [diff] [blame] | 925 | const struct proto_ops inet_dgram_ops = { |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 926 | .family = PF_INET, |
| 927 | .owner = THIS_MODULE, |
| 928 | .release = inet_release, |
| 929 | .bind = inet_bind, |
| 930 | .connect = inet_dgram_connect, |
| 931 | .socketpair = sock_no_socketpair, |
| 932 | .accept = sock_no_accept, |
| 933 | .getname = inet_getname, |
| 934 | .poll = udp_poll, |
| 935 | .ioctl = inet_ioctl, |
| 936 | .listen = sock_no_listen, |
| 937 | .shutdown = inet_shutdown, |
| 938 | .setsockopt = sock_common_setsockopt, |
| 939 | .getsockopt = sock_common_getsockopt, |
| 940 | .sendmsg = inet_sendmsg, |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 941 | .recvmsg = inet_recvmsg, |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 942 | .mmap = sock_no_mmap, |
| 943 | .sendpage = inet_sendpage, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 944 | #ifdef CONFIG_COMPAT |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 945 | .compat_setsockopt = compat_sock_common_setsockopt, |
| 946 | .compat_getsockopt = compat_sock_common_getsockopt, |
Eric W. Biederman | 709b46e | 2011-01-29 16:15:56 +0000 | [diff] [blame] | 947 | .compat_ioctl = inet_compat_ioctl, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 948 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 949 | }; |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 950 | EXPORT_SYMBOL(inet_dgram_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 951 | |
| 952 | /* |
| 953 | * For SOCK_RAW sockets; should be the same as inet_dgram_ops but without |
| 954 | * udp_poll |
| 955 | */ |
Eric Dumazet | 90ddc4f | 2005-12-22 12:49:22 -0800 | [diff] [blame] | 956 | static const struct proto_ops inet_sockraw_ops = { |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 957 | .family = PF_INET, |
| 958 | .owner = THIS_MODULE, |
| 959 | .release = inet_release, |
| 960 | .bind = inet_bind, |
| 961 | .connect = inet_dgram_connect, |
| 962 | .socketpair = sock_no_socketpair, |
| 963 | .accept = sock_no_accept, |
| 964 | .getname = inet_getname, |
| 965 | .poll = datagram_poll, |
| 966 | .ioctl = inet_ioctl, |
| 967 | .listen = sock_no_listen, |
| 968 | .shutdown = inet_shutdown, |
| 969 | .setsockopt = sock_common_setsockopt, |
| 970 | .getsockopt = sock_common_getsockopt, |
| 971 | .sendmsg = inet_sendmsg, |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 972 | .recvmsg = inet_recvmsg, |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 973 | .mmap = sock_no_mmap, |
| 974 | .sendpage = inet_sendpage, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 975 | #ifdef CONFIG_COMPAT |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 976 | .compat_setsockopt = compat_sock_common_setsockopt, |
| 977 | .compat_getsockopt = compat_sock_common_getsockopt, |
Eric W. Biederman | 709b46e | 2011-01-29 16:15:56 +0000 | [diff] [blame] | 978 | .compat_ioctl = inet_compat_ioctl, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 979 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | }; |
| 981 | |
Stephen Hemminger | ec1b4cf | 2009-10-05 05:58:39 +0000 | [diff] [blame] | 982 | static const struct net_proto_family inet_family_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | .family = PF_INET, |
| 984 | .create = inet_create, |
| 985 | .owner = THIS_MODULE, |
| 986 | }; |
| 987 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 988 | /* Upon startup we insert all the elements in inetsw_array[] into |
| 989 | * the linked list inetsw. |
| 990 | */ |
| 991 | static struct inet_protosw inetsw_array[] = |
| 992 | { |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 993 | { |
| 994 | .type = SOCK_STREAM, |
| 995 | .protocol = IPPROTO_TCP, |
| 996 | .prot = &tcp_prot, |
| 997 | .ops = &inet_stream_ops, |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 998 | .no_check = 0, |
| 999 | .flags = INET_PROTOSW_PERMANENT | |
Arnaldo Carvalho de Melo | d83d846 | 2005-12-13 23:26:10 -0800 | [diff] [blame] | 1000 | INET_PROTOSW_ICSK, |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1001 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1002 | |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1003 | { |
| 1004 | .type = SOCK_DGRAM, |
| 1005 | .protocol = IPPROTO_UDP, |
| 1006 | .prot = &udp_prot, |
| 1007 | .ops = &inet_dgram_ops, |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1008 | .no_check = UDP_CSUM_DEFAULT, |
| 1009 | .flags = INET_PROTOSW_PERMANENT, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1010 | }, |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1011 | |
Vasiliy Kulikov | c319b4d | 2011-05-13 10:01:00 +0000 | [diff] [blame] | 1012 | { |
| 1013 | .type = SOCK_DGRAM, |
| 1014 | .protocol = IPPROTO_ICMP, |
| 1015 | .prot = &ping_prot, |
| 1016 | .ops = &inet_dgram_ops, |
| 1017 | .no_check = UDP_CSUM_DEFAULT, |
| 1018 | .flags = INET_PROTOSW_REUSE, |
| 1019 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | |
| 1021 | { |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1022 | .type = SOCK_RAW, |
| 1023 | .protocol = IPPROTO_IP, /* wild card */ |
| 1024 | .prot = &raw_prot, |
| 1025 | .ops = &inet_sockraw_ops, |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1026 | .no_check = UDP_CSUM_DEFAULT, |
| 1027 | .flags = INET_PROTOSW_REUSE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1028 | } |
| 1029 | }; |
| 1030 | |
Denis Cheng | c40f6ff | 2007-09-16 16:39:25 -0700 | [diff] [blame] | 1031 | #define INETSW_ARRAY_LEN ARRAY_SIZE(inetsw_array) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | |
| 1033 | void inet_register_protosw(struct inet_protosw *p) |
| 1034 | { |
| 1035 | struct list_head *lh; |
| 1036 | struct inet_protosw *answer; |
| 1037 | int protocol = p->protocol; |
| 1038 | struct list_head *last_perm; |
| 1039 | |
| 1040 | spin_lock_bh(&inetsw_lock); |
| 1041 | |
| 1042 | if (p->type >= SOCK_MAX) |
| 1043 | goto out_illegal; |
| 1044 | |
| 1045 | /* If we are trying to override a permanent protocol, bail. */ |
| 1046 | answer = NULL; |
| 1047 | last_perm = &inetsw[p->type]; |
| 1048 | list_for_each(lh, &inetsw[p->type]) { |
| 1049 | answer = list_entry(lh, struct inet_protosw, list); |
| 1050 | |
| 1051 | /* Check only the non-wild match. */ |
| 1052 | if (INET_PROTOSW_PERMANENT & answer->flags) { |
| 1053 | if (protocol == answer->protocol) |
| 1054 | break; |
| 1055 | last_perm = lh; |
| 1056 | } |
| 1057 | |
| 1058 | answer = NULL; |
| 1059 | } |
| 1060 | if (answer) |
| 1061 | goto out_permanent; |
| 1062 | |
| 1063 | /* Add the new entry after the last permanent entry if any, so that |
| 1064 | * the new entry does not override a permanent entry when matched with |
| 1065 | * a wild-card protocol. But it is allowed to override any existing |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1066 | * non-permanent entry. This means that when we remove this entry, the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | * system automatically returns to the old behavior. |
| 1068 | */ |
| 1069 | list_add_rcu(&p->list, last_perm); |
| 1070 | out: |
| 1071 | spin_unlock_bh(&inetsw_lock); |
| 1072 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1073 | return; |
| 1074 | |
| 1075 | out_permanent: |
| 1076 | printk(KERN_ERR "Attempt to override permanent protocol %d.\n", |
| 1077 | protocol); |
| 1078 | goto out; |
| 1079 | |
| 1080 | out_illegal: |
| 1081 | printk(KERN_ERR |
| 1082 | "Ignoring attempt to register invalid socket type %d.\n", |
| 1083 | p->type); |
| 1084 | goto out; |
| 1085 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 1086 | EXPORT_SYMBOL(inet_register_protosw); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1087 | |
| 1088 | void inet_unregister_protosw(struct inet_protosw *p) |
| 1089 | { |
| 1090 | if (INET_PROTOSW_PERMANENT & p->flags) { |
| 1091 | printk(KERN_ERR |
| 1092 | "Attempt to unregister permanent protocol %d.\n", |
| 1093 | p->protocol); |
| 1094 | } else { |
| 1095 | spin_lock_bh(&inetsw_lock); |
| 1096 | list_del_rcu(&p->list); |
| 1097 | spin_unlock_bh(&inetsw_lock); |
| 1098 | |
| 1099 | synchronize_net(); |
| 1100 | } |
| 1101 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 1102 | EXPORT_SYMBOL(inet_unregister_protosw); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1103 | |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1104 | /* |
| 1105 | * Shall we try to damage output packets if routing dev changes? |
| 1106 | */ |
| 1107 | |
Brian Haley | ab32ea5 | 2006-09-22 14:15:41 -0700 | [diff] [blame] | 1108 | int sysctl_ip_dynaddr __read_mostly; |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1109 | |
| 1110 | static int inet_sk_reselect_saddr(struct sock *sk) |
| 1111 | { |
| 1112 | struct inet_sock *inet = inet_sk(sk); |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 1113 | __be32 old_saddr = inet->inet_saddr; |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 1114 | __be32 daddr = inet->inet_daddr; |
David S. Miller | 6e86913 | 2011-05-06 16:18:04 -0700 | [diff] [blame] | 1115 | struct flowi4 *fl4; |
David S. Miller | b23dd4f | 2011-03-02 14:31:35 -0800 | [diff] [blame] | 1116 | struct rtable *rt; |
| 1117 | __be32 new_saddr; |
Eric Dumazet | f6d8bd0 | 2011-04-21 09:45:37 +0000 | [diff] [blame] | 1118 | struct ip_options_rcu *inet_opt; |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1119 | |
Eric Dumazet | f6d8bd0 | 2011-04-21 09:45:37 +0000 | [diff] [blame] | 1120 | inet_opt = rcu_dereference_protected(inet->inet_opt, |
| 1121 | sock_owned_by_user(sk)); |
| 1122 | if (inet_opt && inet_opt->opt.srr) |
| 1123 | daddr = inet_opt->opt.faddr; |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1124 | |
| 1125 | /* Query new route. */ |
David S. Miller | 6e86913 | 2011-05-06 16:18:04 -0700 | [diff] [blame] | 1126 | fl4 = &inet->cork.fl.u.ip4; |
| 1127 | rt = ip_route_connect(fl4, daddr, 0, RT_CONN_FLAGS(sk), |
David S. Miller | b23dd4f | 2011-03-02 14:31:35 -0800 | [diff] [blame] | 1128 | sk->sk_bound_dev_if, sk->sk_protocol, |
| 1129 | inet->inet_sport, inet->inet_dport, sk, false); |
| 1130 | if (IS_ERR(rt)) |
| 1131 | return PTR_ERR(rt); |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1132 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1133 | sk_setup_caps(sk, &rt->dst); |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1134 | |
David S. Miller | 6e86913 | 2011-05-06 16:18:04 -0700 | [diff] [blame] | 1135 | new_saddr = fl4->saddr; |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1136 | |
| 1137 | if (new_saddr == old_saddr) |
| 1138 | return 0; |
| 1139 | |
| 1140 | if (sysctl_ip_dynaddr > 1) { |
Harvey Harrison | 673d57e | 2008-10-31 00:53:57 -0700 | [diff] [blame] | 1141 | printk(KERN_INFO "%s(): shifting inet->saddr from %pI4 to %pI4\n", |
| 1142 | __func__, &old_saddr, &new_saddr); |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1143 | } |
| 1144 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 1145 | inet->inet_saddr = inet->inet_rcv_saddr = new_saddr; |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1146 | |
| 1147 | /* |
| 1148 | * XXX The only one ugly spot where we need to |
| 1149 | * XXX really change the sockets identity after |
| 1150 | * XXX it has entered the hashes. -DaveM |
| 1151 | * |
| 1152 | * Besides that, it does not check for connection |
| 1153 | * uniqueness. Wait for troubles. |
| 1154 | */ |
| 1155 | __sk_prot_rehash(sk); |
| 1156 | return 0; |
| 1157 | } |
| 1158 | |
| 1159 | int inet_sk_rebuild_header(struct sock *sk) |
| 1160 | { |
| 1161 | struct inet_sock *inet = inet_sk(sk); |
| 1162 | struct rtable *rt = (struct rtable *)__sk_dst_check(sk, 0); |
Al Viro | 3ca3c68 | 2006-09-27 18:28:07 -0700 | [diff] [blame] | 1163 | __be32 daddr; |
Eric Dumazet | f6d8bd0 | 2011-04-21 09:45:37 +0000 | [diff] [blame] | 1164 | struct ip_options_rcu *inet_opt; |
David S. Miller | 6e86913 | 2011-05-06 16:18:04 -0700 | [diff] [blame] | 1165 | struct flowi4 *fl4; |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1166 | int err; |
| 1167 | |
| 1168 | /* Route is OK, nothing to do. */ |
| 1169 | if (rt) |
| 1170 | return 0; |
| 1171 | |
| 1172 | /* Reroute. */ |
Eric Dumazet | f6d8bd0 | 2011-04-21 09:45:37 +0000 | [diff] [blame] | 1173 | rcu_read_lock(); |
| 1174 | inet_opt = rcu_dereference(inet->inet_opt); |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 1175 | daddr = inet->inet_daddr; |
Eric Dumazet | f6d8bd0 | 2011-04-21 09:45:37 +0000 | [diff] [blame] | 1176 | if (inet_opt && inet_opt->opt.srr) |
| 1177 | daddr = inet_opt->opt.faddr; |
| 1178 | rcu_read_unlock(); |
David S. Miller | 6e86913 | 2011-05-06 16:18:04 -0700 | [diff] [blame] | 1179 | fl4 = &inet->cork.fl.u.ip4; |
| 1180 | 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] | 1181 | inet->inet_dport, inet->inet_sport, |
| 1182 | sk->sk_protocol, RT_CONN_FLAGS(sk), |
| 1183 | sk->sk_bound_dev_if); |
David S. Miller | b23dd4f | 2011-03-02 14:31:35 -0800 | [diff] [blame] | 1184 | if (!IS_ERR(rt)) { |
| 1185 | err = 0; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1186 | sk_setup_caps(sk, &rt->dst); |
David S. Miller | b23dd4f | 2011-03-02 14:31:35 -0800 | [diff] [blame] | 1187 | } else { |
| 1188 | err = PTR_ERR(rt); |
| 1189 | |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1190 | /* Routing failed... */ |
| 1191 | sk->sk_route_caps = 0; |
| 1192 | /* |
| 1193 | * Other protocols have to map its equivalent state to TCP_SYN_SENT. |
| 1194 | * DCCP maps its DCCP_REQUESTING state to TCP_SYN_SENT. -acme |
| 1195 | */ |
| 1196 | if (!sysctl_ip_dynaddr || |
| 1197 | sk->sk_state != TCP_SYN_SENT || |
| 1198 | (sk->sk_userlocks & SOCK_BINDADDR_LOCK) || |
| 1199 | (err = inet_sk_reselect_saddr(sk)) != 0) |
| 1200 | sk->sk_err_soft = -err; |
| 1201 | } |
| 1202 | |
| 1203 | return err; |
| 1204 | } |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1205 | EXPORT_SYMBOL(inet_sk_rebuild_header); |
| 1206 | |
Herbert Xu | a430a43 | 2006-07-08 13:34:56 -0700 | [diff] [blame] | 1207 | static int inet_gso_send_check(struct sk_buff *skb) |
| 1208 | { |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1209 | const struct iphdr *iph; |
Alexey Dobriyan | 3261309 | 2009-09-14 12:21:47 +0000 | [diff] [blame] | 1210 | const struct net_protocol *ops; |
Herbert Xu | a430a43 | 2006-07-08 13:34:56 -0700 | [diff] [blame] | 1211 | int proto; |
| 1212 | int ihl; |
| 1213 | int err = -EINVAL; |
| 1214 | |
| 1215 | if (unlikely(!pskb_may_pull(skb, sizeof(*iph)))) |
| 1216 | goto out; |
| 1217 | |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 1218 | iph = ip_hdr(skb); |
Herbert Xu | a430a43 | 2006-07-08 13:34:56 -0700 | [diff] [blame] | 1219 | ihl = iph->ihl * 4; |
| 1220 | if (ihl < sizeof(*iph)) |
| 1221 | goto out; |
| 1222 | |
| 1223 | if (unlikely(!pskb_may_pull(skb, ihl))) |
| 1224 | goto out; |
| 1225 | |
Arnaldo Carvalho de Melo | badff6d | 2007-03-13 13:06:52 -0300 | [diff] [blame] | 1226 | __skb_pull(skb, ihl); |
| 1227 | skb_reset_transport_header(skb); |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 1228 | iph = ip_hdr(skb); |
Herbert Xu | a430a43 | 2006-07-08 13:34:56 -0700 | [diff] [blame] | 1229 | proto = iph->protocol & (MAX_INET_PROTOS - 1); |
| 1230 | err = -EPROTONOSUPPORT; |
| 1231 | |
| 1232 | rcu_read_lock(); |
| 1233 | ops = rcu_dereference(inet_protos[proto]); |
| 1234 | if (likely(ops && ops->gso_send_check)) |
| 1235 | err = ops->gso_send_check(skb); |
| 1236 | rcu_read_unlock(); |
| 1237 | |
| 1238 | out: |
| 1239 | return err; |
| 1240 | } |
| 1241 | |
Michał Mirosław | 04ed3e7 | 2011-01-24 15:32:47 -0800 | [diff] [blame] | 1242 | static struct sk_buff *inet_gso_segment(struct sk_buff *skb, u32 features) |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1243 | { |
| 1244 | struct sk_buff *segs = ERR_PTR(-EINVAL); |
| 1245 | struct iphdr *iph; |
Alexey Dobriyan | 3261309 | 2009-09-14 12:21:47 +0000 | [diff] [blame] | 1246 | const struct net_protocol *ops; |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1247 | int proto; |
| 1248 | int ihl; |
| 1249 | int id; |
Sridhar Samudrala | d7ca4cc | 2009-07-09 08:09:47 +0000 | [diff] [blame] | 1250 | unsigned int offset = 0; |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1251 | |
Stephen Hemminger | d212f87 | 2007-06-27 00:47:37 -0700 | [diff] [blame] | 1252 | if (!(features & NETIF_F_V4_CSUM)) |
| 1253 | features &= ~NETIF_F_SG; |
| 1254 | |
Herbert Xu | bbcf467 | 2006-07-03 19:38:35 -0700 | [diff] [blame] | 1255 | if (unlikely(skb_shinfo(skb)->gso_type & |
| 1256 | ~(SKB_GSO_TCPV4 | |
| 1257 | SKB_GSO_UDP | |
| 1258 | SKB_GSO_DODGY | |
| 1259 | SKB_GSO_TCP_ECN | |
| 1260 | 0))) |
| 1261 | goto out; |
| 1262 | |
| 1263 | if (unlikely(!pskb_may_pull(skb, sizeof(*iph)))) |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1264 | goto out; |
| 1265 | |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 1266 | iph = ip_hdr(skb); |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1267 | ihl = iph->ihl * 4; |
| 1268 | if (ihl < sizeof(*iph)) |
| 1269 | goto out; |
| 1270 | |
Herbert Xu | bbcf467 | 2006-07-03 19:38:35 -0700 | [diff] [blame] | 1271 | if (unlikely(!pskb_may_pull(skb, ihl))) |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1272 | goto out; |
| 1273 | |
Arnaldo Carvalho de Melo | badff6d | 2007-03-13 13:06:52 -0300 | [diff] [blame] | 1274 | __skb_pull(skb, ihl); |
| 1275 | skb_reset_transport_header(skb); |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 1276 | iph = ip_hdr(skb); |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1277 | id = ntohs(iph->id); |
| 1278 | proto = iph->protocol & (MAX_INET_PROTOS - 1); |
| 1279 | segs = ERR_PTR(-EPROTONOSUPPORT); |
| 1280 | |
| 1281 | rcu_read_lock(); |
| 1282 | ops = rcu_dereference(inet_protos[proto]); |
Herbert Xu | bbcf467 | 2006-07-03 19:38:35 -0700 | [diff] [blame] | 1283 | if (likely(ops && ops->gso_segment)) |
Herbert Xu | 576a30e | 2006-06-27 13:22:38 -0700 | [diff] [blame] | 1284 | segs = ops->gso_segment(skb, features); |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1285 | rcu_read_unlock(); |
| 1286 | |
Hirofumi Nakagawa | 801678c | 2008-04-29 01:03:09 -0700 | [diff] [blame] | 1287 | if (!segs || IS_ERR(segs)) |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1288 | goto out; |
| 1289 | |
| 1290 | skb = segs; |
| 1291 | do { |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 1292 | iph = ip_hdr(skb); |
Sridhar Samudrala | d7ca4cc | 2009-07-09 08:09:47 +0000 | [diff] [blame] | 1293 | if (proto == IPPROTO_UDP) { |
| 1294 | iph->id = htons(id); |
| 1295 | iph->frag_off = htons(offset >> 3); |
| 1296 | if (skb->next != NULL) |
| 1297 | iph->frag_off |= htons(IP_MF); |
| 1298 | offset += (skb->len - skb->mac_len - iph->ihl * 4); |
| 1299 | } else |
| 1300 | iph->id = htons(id++); |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1301 | iph->tot_len = htons(skb->len - skb->mac_len); |
| 1302 | iph->check = 0; |
Arnaldo Carvalho de Melo | d56f90a | 2007-04-10 20:50:43 -0700 | [diff] [blame] | 1303 | iph->check = ip_fast_csum(skb_network_header(skb), iph->ihl); |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1304 | } while ((skb = skb->next)); |
| 1305 | |
| 1306 | out: |
| 1307 | return segs; |
| 1308 | } |
| 1309 | |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1310 | static struct sk_buff **inet_gro_receive(struct sk_buff **head, |
| 1311 | struct sk_buff *skb) |
| 1312 | { |
Alexey Dobriyan | 3261309 | 2009-09-14 12:21:47 +0000 | [diff] [blame] | 1313 | const struct net_protocol *ops; |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1314 | struct sk_buff **pp = NULL; |
| 1315 | struct sk_buff *p; |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1316 | const struct iphdr *iph; |
Herbert Xu | a5b1cf2 | 2009-05-26 18:50:28 +0000 | [diff] [blame] | 1317 | unsigned int hlen; |
| 1318 | unsigned int off; |
Herbert Xu | 1075f3f | 2009-05-26 18:50:29 +0000 | [diff] [blame] | 1319 | unsigned int id; |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1320 | int flush = 1; |
| 1321 | int proto; |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1322 | |
Herbert Xu | a5b1cf2 | 2009-05-26 18:50:28 +0000 | [diff] [blame] | 1323 | off = skb_gro_offset(skb); |
| 1324 | hlen = off + sizeof(*iph); |
| 1325 | iph = skb_gro_header_fast(skb, off); |
| 1326 | if (skb_gro_header_hard(skb, hlen)) { |
| 1327 | iph = skb_gro_header_slow(skb, hlen, off); |
| 1328 | if (unlikely(!iph)) |
| 1329 | goto out; |
| 1330 | } |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1331 | |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1332 | proto = iph->protocol & (MAX_INET_PROTOS - 1); |
| 1333 | |
| 1334 | rcu_read_lock(); |
| 1335 | ops = rcu_dereference(inet_protos[proto]); |
| 1336 | if (!ops || !ops->gro_receive) |
| 1337 | goto out_unlock; |
| 1338 | |
Herbert Xu | a5ad24b | 2009-02-08 18:00:39 +0000 | [diff] [blame] | 1339 | if (*(u8 *)iph != 0x45) |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1340 | goto out_unlock; |
| 1341 | |
| 1342 | if (unlikely(ip_fast_csum((u8 *)iph, iph->ihl))) |
| 1343 | goto out_unlock; |
| 1344 | |
Eric Dumazet | 0eae88f | 2010-04-20 19:06:52 -0700 | [diff] [blame] | 1345 | id = ntohl(*(__be32 *)&iph->id); |
| 1346 | flush = (u16)((ntohl(*(__be32 *)iph) ^ skb_gro_len(skb)) | (id ^ IP_DF)); |
Herbert Xu | 1075f3f | 2009-05-26 18:50:29 +0000 | [diff] [blame] | 1347 | id >>= 16; |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1348 | |
| 1349 | for (p = *head; p; p = p->next) { |
| 1350 | struct iphdr *iph2; |
| 1351 | |
| 1352 | if (!NAPI_GRO_CB(p)->same_flow) |
| 1353 | continue; |
| 1354 | |
| 1355 | iph2 = ip_hdr(p); |
| 1356 | |
Herbert Xu | a5ad24b | 2009-02-08 18:00:39 +0000 | [diff] [blame] | 1357 | if ((iph->protocol ^ iph2->protocol) | |
| 1358 | (iph->tos ^ iph2->tos) | |
Eric Dumazet | 0eae88f | 2010-04-20 19:06:52 -0700 | [diff] [blame] | 1359 | ((__force u32)iph->saddr ^ (__force u32)iph2->saddr) | |
| 1360 | ((__force u32)iph->daddr ^ (__force u32)iph2->daddr)) { |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1361 | NAPI_GRO_CB(p)->same_flow = 0; |
| 1362 | continue; |
| 1363 | } |
| 1364 | |
| 1365 | /* All fields must match except length and checksum. */ |
| 1366 | NAPI_GRO_CB(p)->flush |= |
Herbert Xu | a5ad24b | 2009-02-08 18:00:39 +0000 | [diff] [blame] | 1367 | (iph->ttl ^ iph2->ttl) | |
| 1368 | ((u16)(ntohs(iph2->id) + NAPI_GRO_CB(p)->count) ^ id); |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1369 | |
| 1370 | NAPI_GRO_CB(p)->flush |= flush; |
| 1371 | } |
| 1372 | |
| 1373 | NAPI_GRO_CB(skb)->flush |= flush; |
Herbert Xu | 8691173 | 2009-01-29 14:19:50 +0000 | [diff] [blame] | 1374 | skb_gro_pull(skb, sizeof(*iph)); |
| 1375 | skb_set_transport_header(skb, skb_gro_offset(skb)); |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1376 | |
| 1377 | pp = ops->gro_receive(head, skb); |
| 1378 | |
| 1379 | out_unlock: |
| 1380 | rcu_read_unlock(); |
| 1381 | |
| 1382 | out: |
| 1383 | NAPI_GRO_CB(skb)->flush |= flush; |
| 1384 | |
| 1385 | return pp; |
| 1386 | } |
| 1387 | |
| 1388 | static int inet_gro_complete(struct sk_buff *skb) |
| 1389 | { |
Alexey Dobriyan | 3261309 | 2009-09-14 12:21:47 +0000 | [diff] [blame] | 1390 | const struct net_protocol *ops; |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1391 | struct iphdr *iph = ip_hdr(skb); |
| 1392 | int proto = iph->protocol & (MAX_INET_PROTOS - 1); |
| 1393 | int err = -ENOSYS; |
| 1394 | __be16 newlen = htons(skb->len - skb_network_offset(skb)); |
| 1395 | |
| 1396 | csum_replace2(&iph->check, iph->tot_len, newlen); |
| 1397 | iph->tot_len = newlen; |
| 1398 | |
| 1399 | rcu_read_lock(); |
| 1400 | ops = rcu_dereference(inet_protos[proto]); |
| 1401 | if (WARN_ON(!ops || !ops->gro_complete)) |
| 1402 | goto out_unlock; |
| 1403 | |
| 1404 | err = ops->gro_complete(skb); |
| 1405 | |
| 1406 | out_unlock: |
| 1407 | rcu_read_unlock(); |
| 1408 | |
| 1409 | return err; |
| 1410 | } |
| 1411 | |
Denis V. Lunev | eee4fe4 | 2008-04-03 14:27:58 -0700 | [diff] [blame] | 1412 | int inet_ctl_sock_create(struct sock **sk, unsigned short family, |
Denis V. Lunev | 5677242 | 2008-04-03 14:28:30 -0700 | [diff] [blame] | 1413 | unsigned short type, unsigned char protocol, |
| 1414 | struct net *net) |
Denis V. Lunev | 3d58b5f | 2008-04-03 14:22:32 -0700 | [diff] [blame] | 1415 | { |
Denis V. Lunev | eee4fe4 | 2008-04-03 14:27:58 -0700 | [diff] [blame] | 1416 | struct socket *sock; |
| 1417 | int rc = sock_create_kern(family, type, protocol, &sock); |
Denis V. Lunev | 3d58b5f | 2008-04-03 14:22:32 -0700 | [diff] [blame] | 1418 | |
| 1419 | if (rc == 0) { |
Denis V. Lunev | eee4fe4 | 2008-04-03 14:27:58 -0700 | [diff] [blame] | 1420 | *sk = sock->sk; |
| 1421 | (*sk)->sk_allocation = GFP_ATOMIC; |
Denis V. Lunev | 3d58b5f | 2008-04-03 14:22:32 -0700 | [diff] [blame] | 1422 | /* |
| 1423 | * Unhash it so that IP input processing does not even see it, |
| 1424 | * we do not wish this socket to see incoming packets. |
| 1425 | */ |
Denis V. Lunev | eee4fe4 | 2008-04-03 14:27:58 -0700 | [diff] [blame] | 1426 | (*sk)->sk_prot->unhash(*sk); |
Denis V. Lunev | 5677242 | 2008-04-03 14:28:30 -0700 | [diff] [blame] | 1427 | |
| 1428 | sk_change_net(*sk, net); |
Denis V. Lunev | 3d58b5f | 2008-04-03 14:22:32 -0700 | [diff] [blame] | 1429 | } |
| 1430 | return rc; |
| 1431 | } |
Denis V. Lunev | 3d58b5f | 2008-04-03 14:22:32 -0700 | [diff] [blame] | 1432 | EXPORT_SYMBOL_GPL(inet_ctl_sock_create); |
| 1433 | |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 1434 | unsigned long snmp_fold_field(void __percpu *mib[], int offt) |
Herbert Xu | 5e0f043 | 2007-04-24 21:53:35 -0700 | [diff] [blame] | 1435 | { |
| 1436 | unsigned long res = 0; |
| 1437 | int i; |
| 1438 | |
| 1439 | for_each_possible_cpu(i) { |
| 1440 | res += *(((unsigned long *) per_cpu_ptr(mib[0], i)) + offt); |
| 1441 | res += *(((unsigned long *) per_cpu_ptr(mib[1], i)) + offt); |
| 1442 | } |
| 1443 | return res; |
| 1444 | } |
| 1445 | EXPORT_SYMBOL_GPL(snmp_fold_field); |
| 1446 | |
Eric Dumazet | 4ce3c18 | 2010-06-30 13:31:19 -0700 | [diff] [blame] | 1447 | #if BITS_PER_LONG==32 |
| 1448 | |
| 1449 | u64 snmp_fold_field64(void __percpu *mib[], int offt, size_t syncp_offset) |
| 1450 | { |
| 1451 | u64 res = 0; |
| 1452 | int cpu; |
| 1453 | |
| 1454 | for_each_possible_cpu(cpu) { |
| 1455 | void *bhptr, *userptr; |
| 1456 | struct u64_stats_sync *syncp; |
| 1457 | u64 v_bh, v_user; |
| 1458 | unsigned int start; |
| 1459 | |
| 1460 | /* first mib used by softirq context, we must use _bh() accessors */ |
| 1461 | bhptr = per_cpu_ptr(SNMP_STAT_BHPTR(mib), cpu); |
| 1462 | syncp = (struct u64_stats_sync *)(bhptr + syncp_offset); |
| 1463 | do { |
| 1464 | start = u64_stats_fetch_begin_bh(syncp); |
| 1465 | v_bh = *(((u64 *) bhptr) + offt); |
| 1466 | } while (u64_stats_fetch_retry_bh(syncp, start)); |
| 1467 | |
| 1468 | /* second mib used in USER context */ |
| 1469 | userptr = per_cpu_ptr(SNMP_STAT_USRPTR(mib), cpu); |
| 1470 | syncp = (struct u64_stats_sync *)(userptr + syncp_offset); |
| 1471 | do { |
| 1472 | start = u64_stats_fetch_begin(syncp); |
| 1473 | v_user = *(((u64 *) userptr) + offt); |
| 1474 | } while (u64_stats_fetch_retry(syncp, start)); |
| 1475 | |
| 1476 | res += v_bh + v_user; |
| 1477 | } |
| 1478 | return res; |
| 1479 | } |
| 1480 | EXPORT_SYMBOL_GPL(snmp_fold_field64); |
| 1481 | #endif |
| 1482 | |
Eric Dumazet | 1823e4c8 | 2010-06-22 20:58:41 +0000 | [diff] [blame] | 1483 | int snmp_mib_init(void __percpu *ptr[2], size_t mibsize, size_t align) |
Herbert Xu | 5e0f043 | 2007-04-24 21:53:35 -0700 | [diff] [blame] | 1484 | { |
| 1485 | BUG_ON(ptr == NULL); |
Eric Dumazet | 1823e4c8 | 2010-06-22 20:58:41 +0000 | [diff] [blame] | 1486 | ptr[0] = __alloc_percpu(mibsize, align); |
Herbert Xu | 5e0f043 | 2007-04-24 21:53:35 -0700 | [diff] [blame] | 1487 | if (!ptr[0]) |
| 1488 | goto err0; |
Eric Dumazet | 1823e4c8 | 2010-06-22 20:58:41 +0000 | [diff] [blame] | 1489 | ptr[1] = __alloc_percpu(mibsize, align); |
Herbert Xu | 5e0f043 | 2007-04-24 21:53:35 -0700 | [diff] [blame] | 1490 | if (!ptr[1]) |
| 1491 | goto err1; |
| 1492 | return 0; |
| 1493 | err1: |
| 1494 | free_percpu(ptr[0]); |
| 1495 | ptr[0] = NULL; |
| 1496 | err0: |
| 1497 | return -ENOMEM; |
| 1498 | } |
| 1499 | EXPORT_SYMBOL_GPL(snmp_mib_init); |
| 1500 | |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 1501 | void snmp_mib_free(void __percpu *ptr[2]) |
Herbert Xu | 5e0f043 | 2007-04-24 21:53:35 -0700 | [diff] [blame] | 1502 | { |
| 1503 | BUG_ON(ptr == NULL); |
| 1504 | free_percpu(ptr[0]); |
| 1505 | free_percpu(ptr[1]); |
| 1506 | ptr[0] = ptr[1] = NULL; |
| 1507 | } |
| 1508 | EXPORT_SYMBOL_GPL(snmp_mib_free); |
| 1509 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1510 | #ifdef CONFIG_IP_MULTICAST |
Alexey Dobriyan | 3261309 | 2009-09-14 12:21:47 +0000 | [diff] [blame] | 1511 | static const struct net_protocol igmp_protocol = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1512 | .handler = igmp_rcv, |
Alexey Dobriyan | b4ee07d | 2008-12-25 16:42:23 -0800 | [diff] [blame] | 1513 | .netns_ok = 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1514 | }; |
| 1515 | #endif |
| 1516 | |
Alexey Dobriyan | 3261309 | 2009-09-14 12:21:47 +0000 | [diff] [blame] | 1517 | static const struct net_protocol tcp_protocol = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1518 | .handler = tcp_v4_rcv, |
| 1519 | .err_handler = tcp_v4_err, |
Herbert Xu | a430a43 | 2006-07-08 13:34:56 -0700 | [diff] [blame] | 1520 | .gso_send_check = tcp_v4_gso_send_check, |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1521 | .gso_segment = tcp_tso_segment, |
Herbert Xu | bf296b1 | 2008-12-15 23:43:36 -0800 | [diff] [blame] | 1522 | .gro_receive = tcp4_gro_receive, |
| 1523 | .gro_complete = tcp4_gro_complete, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1524 | .no_policy = 1, |
Denis V. Lunev | 92f1fec | 2008-03-24 15:34:06 -0700 | [diff] [blame] | 1525 | .netns_ok = 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1526 | }; |
| 1527 | |
Alexey Dobriyan | 3261309 | 2009-09-14 12:21:47 +0000 | [diff] [blame] | 1528 | static const struct net_protocol udp_protocol = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1529 | .handler = udp_rcv, |
| 1530 | .err_handler = udp_err, |
Sridhar Samudrala | d7ca4cc | 2009-07-09 08:09:47 +0000 | [diff] [blame] | 1531 | .gso_send_check = udp4_ufo_send_check, |
| 1532 | .gso_segment = udp4_ufo_fragment, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1533 | .no_policy = 1, |
Denis V. Lunev | 92f1fec | 2008-03-24 15:34:06 -0700 | [diff] [blame] | 1534 | .netns_ok = 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1535 | }; |
| 1536 | |
Alexey Dobriyan | 3261309 | 2009-09-14 12:21:47 +0000 | [diff] [blame] | 1537 | static const struct net_protocol icmp_protocol = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1538 | .handler = icmp_rcv, |
Vasiliy Kulikov | c319b4d | 2011-05-13 10:01:00 +0000 | [diff] [blame] | 1539 | .err_handler = ping_err, |
Herbert Xu | 8b7817f | 2007-12-12 10:44:43 -0800 | [diff] [blame] | 1540 | .no_policy = 1, |
Denis V. Lunev | 92f1fec | 2008-03-24 15:34:06 -0700 | [diff] [blame] | 1541 | .netns_ok = 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1542 | }; |
| 1543 | |
Pavel Emelyanov | 9b4661b | 2008-07-18 04:01:44 -0700 | [diff] [blame] | 1544 | static __net_init int ipv4_mib_init_net(struct net *net) |
| 1545 | { |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 1546 | if (snmp_mib_init((void __percpu **)net->mib.tcp_statistics, |
Eric Dumazet | 1823e4c8 | 2010-06-22 20:58:41 +0000 | [diff] [blame] | 1547 | sizeof(struct tcp_mib), |
| 1548 | __alignof__(struct tcp_mib)) < 0) |
Pavel Emelyanov | 57ef42d | 2008-07-18 04:02:08 -0700 | [diff] [blame] | 1549 | goto err_tcp_mib; |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 1550 | if (snmp_mib_init((void __percpu **)net->mib.ip_statistics, |
Eric Dumazet | 1823e4c8 | 2010-06-22 20:58:41 +0000 | [diff] [blame] | 1551 | sizeof(struct ipstats_mib), |
| 1552 | __alignof__(struct ipstats_mib)) < 0) |
Pavel Emelyanov | a20f579 | 2008-07-18 04:02:42 -0700 | [diff] [blame] | 1553 | goto err_ip_mib; |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 1554 | if (snmp_mib_init((void __percpu **)net->mib.net_statistics, |
Eric Dumazet | 1823e4c8 | 2010-06-22 20:58:41 +0000 | [diff] [blame] | 1555 | sizeof(struct linux_mib), |
| 1556 | __alignof__(struct linux_mib)) < 0) |
Pavel Emelyanov | 61a7e26 | 2008-07-18 04:03:08 -0700 | [diff] [blame] | 1557 | goto err_net_mib; |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 1558 | if (snmp_mib_init((void __percpu **)net->mib.udp_statistics, |
Eric Dumazet | 1823e4c8 | 2010-06-22 20:58:41 +0000 | [diff] [blame] | 1559 | sizeof(struct udp_mib), |
| 1560 | __alignof__(struct udp_mib)) < 0) |
Pavel Emelyanov | 2f275f9 | 2008-07-18 04:03:27 -0700 | [diff] [blame] | 1561 | goto err_udp_mib; |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 1562 | if (snmp_mib_init((void __percpu **)net->mib.udplite_statistics, |
Eric Dumazet | 1823e4c8 | 2010-06-22 20:58:41 +0000 | [diff] [blame] | 1563 | sizeof(struct udp_mib), |
| 1564 | __alignof__(struct udp_mib)) < 0) |
Pavel Emelyanov | 386019d | 2008-07-18 04:03:45 -0700 | [diff] [blame] | 1565 | goto err_udplite_mib; |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 1566 | if (snmp_mib_init((void __percpu **)net->mib.icmp_statistics, |
Eric Dumazet | 1823e4c8 | 2010-06-22 20:58:41 +0000 | [diff] [blame] | 1567 | sizeof(struct icmp_mib), |
| 1568 | __alignof__(struct icmp_mib)) < 0) |
Pavel Emelyanov | b60538a | 2008-07-18 04:04:02 -0700 | [diff] [blame] | 1569 | goto err_icmp_mib; |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 1570 | if (snmp_mib_init((void __percpu **)net->mib.icmpmsg_statistics, |
Eric Dumazet | 1823e4c8 | 2010-06-22 20:58:41 +0000 | [diff] [blame] | 1571 | sizeof(struct icmpmsg_mib), |
| 1572 | __alignof__(struct icmpmsg_mib)) < 0) |
Pavel Emelyanov | 923c658 | 2008-07-18 04:04:22 -0700 | [diff] [blame] | 1573 | goto err_icmpmsg_mib; |
Pavel Emelyanov | 57ef42d | 2008-07-18 04:02:08 -0700 | [diff] [blame] | 1574 | |
| 1575 | tcp_mib_init(net); |
Pavel Emelyanov | 9b4661b | 2008-07-18 04:01:44 -0700 | [diff] [blame] | 1576 | return 0; |
Pavel Emelyanov | 57ef42d | 2008-07-18 04:02:08 -0700 | [diff] [blame] | 1577 | |
Pavel Emelyanov | 923c658 | 2008-07-18 04:04:22 -0700 | [diff] [blame] | 1578 | err_icmpmsg_mib: |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 1579 | snmp_mib_free((void __percpu **)net->mib.icmp_statistics); |
Pavel Emelyanov | b60538a | 2008-07-18 04:04:02 -0700 | [diff] [blame] | 1580 | err_icmp_mib: |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 1581 | snmp_mib_free((void __percpu **)net->mib.udplite_statistics); |
Pavel Emelyanov | 386019d | 2008-07-18 04:03:45 -0700 | [diff] [blame] | 1582 | err_udplite_mib: |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 1583 | snmp_mib_free((void __percpu **)net->mib.udp_statistics); |
Pavel Emelyanov | 2f275f9 | 2008-07-18 04:03:27 -0700 | [diff] [blame] | 1584 | err_udp_mib: |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 1585 | snmp_mib_free((void __percpu **)net->mib.net_statistics); |
Pavel Emelyanov | 61a7e26 | 2008-07-18 04:03:08 -0700 | [diff] [blame] | 1586 | err_net_mib: |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 1587 | snmp_mib_free((void __percpu **)net->mib.ip_statistics); |
Pavel Emelyanov | a20f579 | 2008-07-18 04:02:42 -0700 | [diff] [blame] | 1588 | err_ip_mib: |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 1589 | snmp_mib_free((void __percpu **)net->mib.tcp_statistics); |
Pavel Emelyanov | 57ef42d | 2008-07-18 04:02:08 -0700 | [diff] [blame] | 1590 | err_tcp_mib: |
| 1591 | return -ENOMEM; |
Pavel Emelyanov | 9b4661b | 2008-07-18 04:01:44 -0700 | [diff] [blame] | 1592 | } |
| 1593 | |
| 1594 | static __net_exit void ipv4_mib_exit_net(struct net *net) |
| 1595 | { |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 1596 | snmp_mib_free((void __percpu **)net->mib.icmpmsg_statistics); |
| 1597 | snmp_mib_free((void __percpu **)net->mib.icmp_statistics); |
| 1598 | snmp_mib_free((void __percpu **)net->mib.udplite_statistics); |
| 1599 | snmp_mib_free((void __percpu **)net->mib.udp_statistics); |
| 1600 | snmp_mib_free((void __percpu **)net->mib.net_statistics); |
| 1601 | snmp_mib_free((void __percpu **)net->mib.ip_statistics); |
| 1602 | snmp_mib_free((void __percpu **)net->mib.tcp_statistics); |
Pavel Emelyanov | 9b4661b | 2008-07-18 04:01:44 -0700 | [diff] [blame] | 1603 | } |
| 1604 | |
| 1605 | static __net_initdata struct pernet_operations ipv4_mib_ops = { |
| 1606 | .init = ipv4_mib_init_net, |
| 1607 | .exit = ipv4_mib_exit_net, |
| 1608 | }; |
| 1609 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1610 | static int __init init_ipv4_mibs(void) |
| 1611 | { |
Pavel Emelyanov | d89cbbb | 2008-07-18 04:04:51 -0700 | [diff] [blame] | 1612 | return register_pernet_subsys(&ipv4_mib_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1613 | } |
| 1614 | |
| 1615 | static int ipv4_proc_init(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1616 | |
Herbert Xu | 30e224d | 2005-07-05 14:40:10 -0700 | [diff] [blame] | 1617 | /* |
| 1618 | * IP protocol layer initialiser |
| 1619 | */ |
| 1620 | |
Stephen Hemminger | 7546dd9 | 2009-03-09 08:18:29 +0000 | [diff] [blame] | 1621 | static struct packet_type ip_packet_type __read_mostly = { |
Harvey Harrison | 09640e6 | 2009-02-01 00:45:17 -0800 | [diff] [blame] | 1622 | .type = cpu_to_be16(ETH_P_IP), |
Herbert Xu | 30e224d | 2005-07-05 14:40:10 -0700 | [diff] [blame] | 1623 | .func = ip_rcv, |
Herbert Xu | a430a43 | 2006-07-08 13:34:56 -0700 | [diff] [blame] | 1624 | .gso_send_check = inet_gso_send_check, |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1625 | .gso_segment = inet_gso_segment, |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1626 | .gro_receive = inet_gro_receive, |
| 1627 | .gro_complete = inet_gro_complete, |
Herbert Xu | 30e224d | 2005-07-05 14:40:10 -0700 | [diff] [blame] | 1628 | }; |
| 1629 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1630 | static int __init inet_init(void) |
| 1631 | { |
| 1632 | struct sk_buff *dummy_skb; |
| 1633 | struct inet_protosw *q; |
| 1634 | struct list_head *r; |
| 1635 | int rc = -EINVAL; |
| 1636 | |
YOSHIFUJI Hideaki | ef047f5 | 2006-09-01 00:29:06 -0700 | [diff] [blame] | 1637 | BUILD_BUG_ON(sizeof(struct inet_skb_parm) > sizeof(dummy_skb->cb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1638 | |
Amerigo Wang | e3826f1 | 2010-05-05 00:27:06 +0000 | [diff] [blame] | 1639 | sysctl_local_reserved_ports = kzalloc(65536 / 8, GFP_KERNEL); |
| 1640 | if (!sysctl_local_reserved_ports) |
| 1641 | goto out; |
| 1642 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1643 | rc = proto_register(&tcp_prot, 1); |
| 1644 | if (rc) |
Amerigo Wang | e3826f1 | 2010-05-05 00:27:06 +0000 | [diff] [blame] | 1645 | goto out_free_reserved_ports; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1646 | |
| 1647 | rc = proto_register(&udp_prot, 1); |
| 1648 | if (rc) |
| 1649 | goto out_unregister_tcp_proto; |
| 1650 | |
| 1651 | rc = proto_register(&raw_prot, 1); |
| 1652 | if (rc) |
| 1653 | goto out_unregister_udp_proto; |
| 1654 | |
Vasiliy Kulikov | c319b4d | 2011-05-13 10:01:00 +0000 | [diff] [blame] | 1655 | rc = proto_register(&ping_prot, 1); |
| 1656 | if (rc) |
| 1657 | goto out_unregister_raw_proto; |
| 1658 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1659 | /* |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1660 | * Tell SOCKET that we are alive... |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1661 | */ |
| 1662 | |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1663 | (void)sock_register(&inet_family_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1664 | |
Al Viro | bd7b153 | 2008-07-15 16:00:59 -0400 | [diff] [blame] | 1665 | #ifdef CONFIG_SYSCTL |
| 1666 | ip_static_sysctl_init(); |
| 1667 | #endif |
| 1668 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1669 | /* |
| 1670 | * Add all the base protocols. |
| 1671 | */ |
| 1672 | |
| 1673 | if (inet_add_protocol(&icmp_protocol, IPPROTO_ICMP) < 0) |
| 1674 | printk(KERN_CRIT "inet_init: Cannot add ICMP protocol\n"); |
| 1675 | if (inet_add_protocol(&udp_protocol, IPPROTO_UDP) < 0) |
| 1676 | printk(KERN_CRIT "inet_init: Cannot add UDP protocol\n"); |
| 1677 | if (inet_add_protocol(&tcp_protocol, IPPROTO_TCP) < 0) |
| 1678 | printk(KERN_CRIT "inet_init: Cannot add TCP protocol\n"); |
| 1679 | #ifdef CONFIG_IP_MULTICAST |
| 1680 | if (inet_add_protocol(&igmp_protocol, IPPROTO_IGMP) < 0) |
| 1681 | printk(KERN_CRIT "inet_init: Cannot add IGMP protocol\n"); |
| 1682 | #endif |
| 1683 | |
| 1684 | /* Register the socket-side information for inet_create. */ |
| 1685 | for (r = &inetsw[0]; r < &inetsw[SOCK_MAX]; ++r) |
| 1686 | INIT_LIST_HEAD(r); |
| 1687 | |
| 1688 | for (q = inetsw_array; q < &inetsw_array[INETSW_ARRAY_LEN]; ++q) |
| 1689 | inet_register_protosw(q); |
| 1690 | |
| 1691 | /* |
| 1692 | * Set the ARP module up |
| 1693 | */ |
| 1694 | |
| 1695 | arp_init(); |
| 1696 | |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1697 | /* |
| 1698 | * Set the IP module up |
| 1699 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1700 | |
| 1701 | ip_init(); |
| 1702 | |
Denis V. Lunev | 9b0f976 | 2008-02-29 11:13:15 -0800 | [diff] [blame] | 1703 | tcp_v4_init(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1704 | |
| 1705 | /* Setup TCP slab cache for open requests. */ |
| 1706 | tcp_init(); |
| 1707 | |
Hideo Aoki | 95766ff | 2007-12-31 00:29:24 -0800 | [diff] [blame] | 1708 | /* Setup UDP memory threshold */ |
| 1709 | udp_init(); |
| 1710 | |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 1711 | /* Add UDP-Lite (RFC 3828) */ |
| 1712 | udplite4_register(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1713 | |
Vasiliy Kulikov | c319b4d | 2011-05-13 10:01:00 +0000 | [diff] [blame] | 1714 | ping_init(); |
| 1715 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1716 | /* |
| 1717 | * Set the ICMP layer up |
| 1718 | */ |
| 1719 | |
Denis V. Lunev | a5710d6 | 2008-02-29 11:14:50 -0800 | [diff] [blame] | 1720 | if (icmp_init() < 0) |
| 1721 | panic("Failed to create the ICMP control socket.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1722 | |
| 1723 | /* |
| 1724 | * Initialise the multicast router |
| 1725 | */ |
| 1726 | #if defined(CONFIG_IP_MROUTE) |
Wang Chen | 03d2f89 | 2008-07-03 12:13:36 +0800 | [diff] [blame] | 1727 | if (ip_mr_init()) |
| 1728 | printk(KERN_CRIT "inet_init: Cannot init ipv4 mroute\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1729 | #endif |
| 1730 | /* |
| 1731 | * Initialise per-cpu ipv4 mibs |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1732 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1733 | |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1734 | if (init_ipv4_mibs()) |
Wang Chen | 03d2f89 | 2008-07-03 12:13:36 +0800 | [diff] [blame] | 1735 | printk(KERN_CRIT "inet_init: Cannot init ipv4 mibs\n"); |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1736 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1737 | ipv4_proc_init(); |
| 1738 | |
| 1739 | ipfrag_init(); |
| 1740 | |
Herbert Xu | 30e224d | 2005-07-05 14:40:10 -0700 | [diff] [blame] | 1741 | dev_add_pack(&ip_packet_type); |
| 1742 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1743 | rc = 0; |
| 1744 | out: |
| 1745 | return rc; |
Vasiliy Kulikov | c319b4d | 2011-05-13 10:01:00 +0000 | [diff] [blame] | 1746 | out_unregister_raw_proto: |
| 1747 | proto_unregister(&raw_prot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1748 | out_unregister_udp_proto: |
| 1749 | proto_unregister(&udp_prot); |
Olaf Kirch | 321efff | 2006-09-27 16:33:45 -0700 | [diff] [blame] | 1750 | out_unregister_tcp_proto: |
| 1751 | proto_unregister(&tcp_prot); |
Amerigo Wang | e3826f1 | 2010-05-05 00:27:06 +0000 | [diff] [blame] | 1752 | out_free_reserved_ports: |
| 1753 | kfree(sysctl_local_reserved_ports); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1754 | goto out; |
| 1755 | } |
| 1756 | |
Heiko Carstens | a536e07 | 2006-04-28 15:19:17 -0700 | [diff] [blame] | 1757 | fs_initcall(inet_init); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1758 | |
| 1759 | /* ------------------------------------------------------------------------ */ |
| 1760 | |
| 1761 | #ifdef CONFIG_PROC_FS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1762 | static int __init ipv4_proc_init(void) |
| 1763 | { |
| 1764 | int rc = 0; |
| 1765 | |
| 1766 | if (raw_proc_init()) |
| 1767 | goto out_raw; |
| 1768 | if (tcp4_proc_init()) |
| 1769 | goto out_tcp; |
| 1770 | if (udp4_proc_init()) |
| 1771 | goto out_udp; |
Vasiliy Kulikov | c319b4d | 2011-05-13 10:01:00 +0000 | [diff] [blame] | 1772 | if (ping_proc_init()) |
| 1773 | goto out_ping; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1774 | if (ip_misc_proc_init()) |
| 1775 | goto out_misc; |
| 1776 | out: |
| 1777 | return rc; |
| 1778 | out_misc: |
Vasiliy Kulikov | c319b4d | 2011-05-13 10:01:00 +0000 | [diff] [blame] | 1779 | ping_proc_exit(); |
| 1780 | out_ping: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1781 | udp4_proc_exit(); |
| 1782 | out_udp: |
| 1783 | tcp4_proc_exit(); |
| 1784 | out_tcp: |
| 1785 | raw_proc_exit(); |
| 1786 | out_raw: |
| 1787 | rc = -ENOMEM; |
| 1788 | goto out; |
| 1789 | } |
| 1790 | |
| 1791 | #else /* CONFIG_PROC_FS */ |
| 1792 | static int __init ipv4_proc_init(void) |
| 1793 | { |
| 1794 | return 0; |
| 1795 | } |
| 1796 | #endif /* CONFIG_PROC_FS */ |
| 1797 | |
| 1798 | MODULE_ALIAS_NETPROTO(PF_INET); |
| 1799 | |