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 | * RAW - implementation of IP "raw" sockets. |
| 7 | * |
| 8 | * Version: $Id: raw.c,v 1.64 2002/02/01 22:01:04 davem Exp $ |
| 9 | * |
Jesper Juhl | 02c30a8 | 2005-05-05 16:16:16 -0700 | [diff] [blame] | 10 | * Authors: Ross Biro |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
| 12 | * |
| 13 | * Fixes: |
| 14 | * Alan Cox : verify_area() fixed up |
| 15 | * Alan Cox : ICMP error handling |
| 16 | * Alan Cox : EMSGSIZE if you send too big a packet |
| 17 | * Alan Cox : Now uses generic datagrams and shared |
| 18 | * skbuff library. No more peek crashes, |
| 19 | * no more backlogs |
| 20 | * Alan Cox : Checks sk->broadcast. |
| 21 | * Alan Cox : Uses skb_free_datagram/skb_copy_datagram |
| 22 | * Alan Cox : Raw passes ip options too |
| 23 | * Alan Cox : Setsocketopt added |
| 24 | * Alan Cox : Fixed error return for broadcasts |
| 25 | * Alan Cox : Removed wake_up calls |
| 26 | * Alan Cox : Use ttl/tos |
| 27 | * Alan Cox : Cleaned up old debugging |
| 28 | * Alan Cox : Use new kernel side addresses |
| 29 | * Arnt Gulbrandsen : Fixed MSG_DONTROUTE in raw sockets. |
| 30 | * Alan Cox : BSD style RAW socket demultiplexing. |
| 31 | * Alan Cox : Beginnings of mrouted support. |
| 32 | * Alan Cox : Added IP_HDRINCL option. |
| 33 | * Alan Cox : Skip broadcast check if BSDism set. |
| 34 | * David S. Miller : New socket lookup architecture. |
| 35 | * |
| 36 | * This program is free software; you can redistribute it and/or |
| 37 | * modify it under the terms of the GNU General Public License |
| 38 | * as published by the Free Software Foundation; either version |
| 39 | * 2 of the License, or (at your option) any later version. |
| 40 | */ |
Dave Jones | bf0d524 | 2006-09-22 14:00:29 -0700 | [diff] [blame] | 41 | |
Alan Cox | 715b49e | 2006-01-18 17:44:07 -0800 | [diff] [blame] | 42 | #include <linux/types.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #include <asm/atomic.h> |
| 44 | #include <asm/byteorder.h> |
| 45 | #include <asm/current.h> |
| 46 | #include <asm/uaccess.h> |
| 47 | #include <asm/ioctls.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | #include <linux/stddef.h> |
| 49 | #include <linux/slab.h> |
| 50 | #include <linux/errno.h> |
| 51 | #include <linux/aio.h> |
| 52 | #include <linux/kernel.h> |
| 53 | #include <linux/spinlock.h> |
| 54 | #include <linux/sockios.h> |
| 55 | #include <linux/socket.h> |
| 56 | #include <linux/in.h> |
| 57 | #include <linux/mroute.h> |
| 58 | #include <linux/netdevice.h> |
| 59 | #include <linux/in_route.h> |
| 60 | #include <linux/route.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | #include <linux/skbuff.h> |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 62 | #include <net/net_namespace.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | #include <net/dst.h> |
| 64 | #include <net/sock.h> |
| 65 | #include <linux/gfp.h> |
| 66 | #include <linux/ip.h> |
| 67 | #include <linux/net.h> |
| 68 | #include <net/ip.h> |
| 69 | #include <net/icmp.h> |
| 70 | #include <net/udp.h> |
| 71 | #include <net/raw.h> |
| 72 | #include <net/snmp.h> |
Arnaldo Carvalho de Melo | c752f07 | 2005-08-09 20:08:28 -0700 | [diff] [blame] | 73 | #include <net/tcp_states.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | #include <net/inet_common.h> |
| 75 | #include <net/checksum.h> |
| 76 | #include <net/xfrm.h> |
| 77 | #include <linux/rtnetlink.h> |
| 78 | #include <linux/proc_fs.h> |
| 79 | #include <linux/seq_file.h> |
| 80 | #include <linux/netfilter.h> |
| 81 | #include <linux/netfilter_ipv4.h> |
| 82 | |
Pavel Emelyanov | b673e4d | 2007-11-19 22:36:45 -0800 | [diff] [blame] | 83 | static struct raw_hashinfo raw_v4_hashinfo = { |
Robert P. J. Day | 938b93a | 2008-03-18 00:59:23 -0700 | [diff] [blame] | 84 | .lock = __RW_LOCK_UNLOCKED(raw_v4_hashinfo.lock), |
Pavel Emelyanov | b673e4d | 2007-11-19 22:36:45 -0800 | [diff] [blame] | 85 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | |
Pavel Emelyanov | fc8717b | 2008-03-22 16:56:51 -0700 | [diff] [blame] | 87 | void raw_hash_sk(struct sock *sk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | { |
Pavel Emelyanov | fc8717b | 2008-03-22 16:56:51 -0700 | [diff] [blame] | 89 | struct raw_hashinfo *h = sk->sk_prot->h.raw_hash; |
Pavel Emelyanov | 65b4c50 | 2007-11-19 22:37:24 -0800 | [diff] [blame] | 90 | struct hlist_head *head; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | |
Pavel Emelyanov | 65b4c50 | 2007-11-19 22:37:24 -0800 | [diff] [blame] | 92 | head = &h->ht[inet_sk(sk)->num & (RAW_HTABLE_SIZE - 1)]; |
| 93 | |
| 94 | write_lock_bh(&h->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | sk_add_node(sk, head); |
Pavel Emelyanov | c29a0bc | 2008-03-31 19:41:46 -0700 | [diff] [blame] | 96 | sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1); |
Pavel Emelyanov | 65b4c50 | 2007-11-19 22:37:24 -0800 | [diff] [blame] | 97 | write_unlock_bh(&h->lock); |
| 98 | } |
| 99 | EXPORT_SYMBOL_GPL(raw_hash_sk); |
| 100 | |
Pavel Emelyanov | fc8717b | 2008-03-22 16:56:51 -0700 | [diff] [blame] | 101 | void raw_unhash_sk(struct sock *sk) |
Pavel Emelyanov | ab70768 | 2007-11-19 22:37:58 -0800 | [diff] [blame] | 102 | { |
Pavel Emelyanov | fc8717b | 2008-03-22 16:56:51 -0700 | [diff] [blame] | 103 | struct raw_hashinfo *h = sk->sk_prot->h.raw_hash; |
| 104 | |
Pavel Emelyanov | ab70768 | 2007-11-19 22:37:58 -0800 | [diff] [blame] | 105 | write_lock_bh(&h->lock); |
| 106 | if (sk_del_node_init(sk)) |
Pavel Emelyanov | c29a0bc | 2008-03-31 19:41:46 -0700 | [diff] [blame] | 107 | sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1); |
Pavel Emelyanov | ab70768 | 2007-11-19 22:37:58 -0800 | [diff] [blame] | 108 | write_unlock_bh(&h->lock); |
| 109 | } |
| 110 | EXPORT_SYMBOL_GPL(raw_unhash_sk); |
| 111 | |
Pavel Emelyanov | be18588 | 2008-01-14 05:35:31 -0800 | [diff] [blame] | 112 | static struct sock *__raw_v4_lookup(struct net *net, struct sock *sk, |
| 113 | unsigned short num, __be32 raddr, __be32 laddr, int dif) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | { |
| 115 | struct hlist_node *node; |
| 116 | |
| 117 | sk_for_each_from(sk, node) { |
| 118 | struct inet_sock *inet = inet_sk(sk); |
| 119 | |
YOSHIFUJI Hideaki | 878628f | 2008-03-26 03:57:35 +0900 | [diff] [blame] | 120 | if (net_eq(sock_net(sk), net) && inet->num == num && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | !(inet->daddr && inet->daddr != raddr) && |
| 122 | !(inet->rcv_saddr && inet->rcv_saddr != laddr) && |
| 123 | !(sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif)) |
| 124 | goto found; /* gotcha */ |
| 125 | } |
| 126 | sk = NULL; |
| 127 | found: |
| 128 | return sk; |
| 129 | } |
| 130 | |
| 131 | /* |
| 132 | * 0 - deliver |
| 133 | * 1 - block |
| 134 | */ |
| 135 | static __inline__ int icmp_filter(struct sock *sk, struct sk_buff *skb) |
| 136 | { |
| 137 | int type; |
| 138 | |
| 139 | if (!pskb_may_pull(skb, sizeof(struct icmphdr))) |
| 140 | return 1; |
| 141 | |
Arnaldo Carvalho de Melo | 88c7664 | 2007-03-13 14:43:18 -0300 | [diff] [blame] | 142 | type = icmp_hdr(skb)->type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | if (type < 32) { |
| 144 | __u32 data = raw_sk(sk)->filter.data; |
| 145 | |
| 146 | return ((1 << type) & data) != 0; |
| 147 | } |
| 148 | |
| 149 | /* Do not block unknown ICMP types */ |
| 150 | return 0; |
| 151 | } |
| 152 | |
| 153 | /* IP input processing comes here for RAW socket delivery. |
| 154 | * Caller owns SKB, so we must make clones. |
| 155 | * |
| 156 | * RFC 1122: SHOULD pass TOS value up to the transport layer. |
| 157 | * -> It does. And not only TOS, but all IP header. |
| 158 | */ |
Pavel Emelyanov | 7bc54c9 | 2007-11-19 22:35:07 -0800 | [diff] [blame] | 159 | static int raw_v4_input(struct sk_buff *skb, struct iphdr *iph, int hash) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | { |
| 161 | struct sock *sk; |
| 162 | struct hlist_head *head; |
Patrick McHardy | d13964f | 2005-08-09 19:45:02 -0700 | [diff] [blame] | 163 | int delivered = 0; |
Pavel Emelyanov | be18588 | 2008-01-14 05:35:31 -0800 | [diff] [blame] | 164 | struct net *net; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | |
Pavel Emelyanov | b673e4d | 2007-11-19 22:36:45 -0800 | [diff] [blame] | 166 | read_lock(&raw_v4_hashinfo.lock); |
| 167 | head = &raw_v4_hashinfo.ht[hash]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | if (hlist_empty(head)) |
| 169 | goto out; |
Pavel Emelyanov | be18588 | 2008-01-14 05:35:31 -0800 | [diff] [blame] | 170 | |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 171 | net = dev_net(skb->dev); |
Pavel Emelyanov | be18588 | 2008-01-14 05:35:31 -0800 | [diff] [blame] | 172 | sk = __raw_v4_lookup(net, __sk_head(head), iph->protocol, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | iph->saddr, iph->daddr, |
| 174 | skb->dev->ifindex); |
| 175 | |
| 176 | while (sk) { |
Patrick McHardy | d13964f | 2005-08-09 19:45:02 -0700 | [diff] [blame] | 177 | delivered = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | if (iph->protocol != IPPROTO_ICMP || !icmp_filter(sk, skb)) { |
| 179 | struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC); |
| 180 | |
| 181 | /* Not releasing hash table! */ |
| 182 | if (clone) |
| 183 | raw_rcv(sk, clone); |
| 184 | } |
Pavel Emelyanov | be18588 | 2008-01-14 05:35:31 -0800 | [diff] [blame] | 185 | sk = __raw_v4_lookup(net, sk_next(sk), iph->protocol, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | iph->saddr, iph->daddr, |
| 187 | skb->dev->ifindex); |
| 188 | } |
| 189 | out: |
Pavel Emelyanov | b673e4d | 2007-11-19 22:36:45 -0800 | [diff] [blame] | 190 | read_unlock(&raw_v4_hashinfo.lock); |
Patrick McHardy | d13964f | 2005-08-09 19:45:02 -0700 | [diff] [blame] | 191 | return delivered; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | } |
| 193 | |
Pavel Emelyanov | 7bc54c9 | 2007-11-19 22:35:07 -0800 | [diff] [blame] | 194 | int raw_local_deliver(struct sk_buff *skb, int protocol) |
| 195 | { |
| 196 | int hash; |
| 197 | struct sock *raw_sk; |
| 198 | |
Pavel Emelyanov | b673e4d | 2007-11-19 22:36:45 -0800 | [diff] [blame] | 199 | hash = protocol & (RAW_HTABLE_SIZE - 1); |
| 200 | raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]); |
Pavel Emelyanov | 7bc54c9 | 2007-11-19 22:35:07 -0800 | [diff] [blame] | 201 | |
| 202 | /* If there maybe a raw socket we must check - if not we |
| 203 | * don't care less |
| 204 | */ |
| 205 | if (raw_sk && !raw_v4_input(skb, ip_hdr(skb), hash)) |
| 206 | raw_sk = NULL; |
| 207 | |
| 208 | return raw_sk != NULL; |
| 209 | |
| 210 | } |
| 211 | |
| 212 | static void raw_err(struct sock *sk, struct sk_buff *skb, u32 info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | { |
| 214 | struct inet_sock *inet = inet_sk(sk); |
Arnaldo Carvalho de Melo | 88c7664 | 2007-03-13 14:43:18 -0300 | [diff] [blame] | 215 | const int type = icmp_hdr(skb)->type; |
| 216 | const int code = icmp_hdr(skb)->code; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | int err = 0; |
| 218 | int harderr = 0; |
| 219 | |
| 220 | /* Report error on raw socket, if: |
| 221 | 1. User requested ip_recverr. |
| 222 | 2. Socket is connected (otherwise the error indication |
| 223 | is useless without ip_recverr and error is hard. |
| 224 | */ |
| 225 | if (!inet->recverr && sk->sk_state != TCP_ESTABLISHED) |
| 226 | return; |
| 227 | |
| 228 | switch (type) { |
| 229 | default: |
| 230 | case ICMP_TIME_EXCEEDED: |
| 231 | err = EHOSTUNREACH; |
| 232 | break; |
| 233 | case ICMP_SOURCE_QUENCH: |
| 234 | return; |
| 235 | case ICMP_PARAMETERPROB: |
| 236 | err = EPROTO; |
| 237 | harderr = 1; |
| 238 | break; |
| 239 | case ICMP_DEST_UNREACH: |
| 240 | err = EHOSTUNREACH; |
| 241 | if (code > NR_ICMP_UNREACH) |
| 242 | break; |
| 243 | err = icmp_err_convert[code].errno; |
| 244 | harderr = icmp_err_convert[code].fatal; |
| 245 | if (code == ICMP_FRAG_NEEDED) { |
| 246 | harderr = inet->pmtudisc != IP_PMTUDISC_DONT; |
| 247 | err = EMSGSIZE; |
| 248 | } |
| 249 | } |
| 250 | |
| 251 | if (inet->recverr) { |
| 252 | struct iphdr *iph = (struct iphdr*)skb->data; |
| 253 | u8 *payload = skb->data + (iph->ihl << 2); |
| 254 | |
| 255 | if (inet->hdrincl) |
| 256 | payload = skb->data; |
| 257 | ip_icmp_error(sk, skb, err, 0, info, payload); |
| 258 | } |
| 259 | |
| 260 | if (inet->recverr || harderr) { |
| 261 | sk->sk_err = err; |
| 262 | sk->sk_error_report(sk); |
| 263 | } |
| 264 | } |
| 265 | |
Pavel Emelyanov | 7bc54c9 | 2007-11-19 22:35:07 -0800 | [diff] [blame] | 266 | void raw_icmp_error(struct sk_buff *skb, int protocol, u32 info) |
| 267 | { |
| 268 | int hash; |
| 269 | struct sock *raw_sk; |
| 270 | struct iphdr *iph; |
Pavel Emelyanov | be18588 | 2008-01-14 05:35:31 -0800 | [diff] [blame] | 271 | struct net *net; |
Pavel Emelyanov | 7bc54c9 | 2007-11-19 22:35:07 -0800 | [diff] [blame] | 272 | |
Pavel Emelyanov | b673e4d | 2007-11-19 22:36:45 -0800 | [diff] [blame] | 273 | hash = protocol & (RAW_HTABLE_SIZE - 1); |
Pavel Emelyanov | 7bc54c9 | 2007-11-19 22:35:07 -0800 | [diff] [blame] | 274 | |
Pavel Emelyanov | b673e4d | 2007-11-19 22:36:45 -0800 | [diff] [blame] | 275 | read_lock(&raw_v4_hashinfo.lock); |
| 276 | raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]); |
Pavel Emelyanov | 7bc54c9 | 2007-11-19 22:35:07 -0800 | [diff] [blame] | 277 | if (raw_sk != NULL) { |
| 278 | iph = (struct iphdr *)skb->data; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 279 | net = dev_net(skb->dev); |
Pavel Emelyanov | be18588 | 2008-01-14 05:35:31 -0800 | [diff] [blame] | 280 | |
| 281 | while ((raw_sk = __raw_v4_lookup(net, raw_sk, protocol, |
| 282 | iph->daddr, iph->saddr, |
Pavel Emelyanov | 7bc54c9 | 2007-11-19 22:35:07 -0800 | [diff] [blame] | 283 | skb->dev->ifindex)) != NULL) { |
| 284 | raw_err(raw_sk, skb, info); |
| 285 | raw_sk = sk_next(raw_sk); |
| 286 | iph = (struct iphdr *)skb->data; |
| 287 | } |
| 288 | } |
Pavel Emelyanov | b673e4d | 2007-11-19 22:36:45 -0800 | [diff] [blame] | 289 | read_unlock(&raw_v4_hashinfo.lock); |
Pavel Emelyanov | 7bc54c9 | 2007-11-19 22:35:07 -0800 | [diff] [blame] | 290 | } |
| 291 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | static int raw_rcv_skb(struct sock * sk, struct sk_buff * skb) |
| 293 | { |
| 294 | /* Charge it to the socket. */ |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 295 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | if (sock_queue_rcv_skb(sk, skb) < 0) { |
Wang Chen | 33c732c | 2007-11-13 20:30:01 -0800 | [diff] [blame] | 297 | atomic_inc(&sk->sk_drops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | kfree_skb(skb); |
| 299 | return NET_RX_DROP; |
| 300 | } |
| 301 | |
| 302 | return NET_RX_SUCCESS; |
| 303 | } |
| 304 | |
| 305 | int raw_rcv(struct sock *sk, struct sk_buff *skb) |
| 306 | { |
| 307 | if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb)) { |
Wang Chen | 33c732c | 2007-11-13 20:30:01 -0800 | [diff] [blame] | 308 | atomic_inc(&sk->sk_drops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | kfree_skb(skb); |
| 310 | return NET_RX_DROP; |
| 311 | } |
Patrick McHardy | b59c270 | 2006-01-06 23:06:10 -0800 | [diff] [blame] | 312 | nf_reset(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | |
Arnaldo Carvalho de Melo | d56f90a | 2007-04-10 20:50:43 -0700 | [diff] [blame] | 314 | skb_push(skb, skb->data - skb_network_header(skb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | |
| 316 | raw_rcv_skb(sk, skb); |
| 317 | return 0; |
| 318 | } |
| 319 | |
Jesper Juhl | f7d7fc0 | 2005-06-18 23:00:34 -0700 | [diff] [blame] | 320 | static int raw_send_hdrinc(struct sock *sk, void *from, size_t length, |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 321 | struct rtable *rt, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | unsigned int flags) |
| 323 | { |
| 324 | struct inet_sock *inet = inet_sk(sk); |
| 325 | int hh_len; |
| 326 | struct iphdr *iph; |
| 327 | struct sk_buff *skb; |
Herbert Xu | f844c74 | 2008-01-05 23:14:44 -0800 | [diff] [blame] | 328 | unsigned int iphlen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | int err; |
| 330 | |
| 331 | if (length > rt->u.dst.dev->mtu) { |
| 332 | ip_local_error(sk, EMSGSIZE, rt->rt_dst, inet->dport, |
| 333 | rt->u.dst.dev->mtu); |
| 334 | return -EMSGSIZE; |
| 335 | } |
| 336 | if (flags&MSG_PROBE) |
| 337 | goto out; |
| 338 | |
| 339 | hh_len = LL_RESERVED_SPACE(rt->u.dst.dev); |
| 340 | |
| 341 | skb = sock_alloc_send_skb(sk, length+hh_len+15, |
| 342 | flags&MSG_DONTWAIT, &err); |
| 343 | if (skb == NULL) |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 344 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | skb_reserve(skb, hh_len); |
| 346 | |
| 347 | skb->priority = sk->sk_priority; |
Laszlo Attila Toth | 4a19ec5 | 2008-01-30 19:08:16 -0800 | [diff] [blame] | 348 | skb->mark = sk->sk_mark; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | skb->dst = dst_clone(&rt->u.dst); |
| 350 | |
Arnaldo Carvalho de Melo | 7e28ecc | 2007-03-10 18:40:59 -0300 | [diff] [blame] | 351 | skb_reset_network_header(skb); |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 352 | iph = ip_hdr(skb); |
Arnaldo Carvalho de Melo | 7e28ecc | 2007-03-10 18:40:59 -0300 | [diff] [blame] | 353 | skb_put(skb, length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | |
| 355 | skb->ip_summed = CHECKSUM_NONE; |
| 356 | |
Arnaldo Carvalho de Melo | b0e380b | 2007-04-10 21:21:55 -0700 | [diff] [blame] | 357 | skb->transport_header = skb->network_header; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | err = memcpy_fromiovecend((void *)iph, from, 0, length); |
| 359 | if (err) |
| 360 | goto error_fault; |
| 361 | |
| 362 | /* We don't modify invalid header */ |
Herbert Xu | f844c74 | 2008-01-05 23:14:44 -0800 | [diff] [blame] | 363 | iphlen = iph->ihl * 4; |
| 364 | if (iphlen >= sizeof(*iph) && iphlen <= length) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | if (!iph->saddr) |
| 366 | iph->saddr = rt->rt_src; |
| 367 | iph->check = 0; |
| 368 | iph->tot_len = htons(length); |
| 369 | if (!iph->id) |
| 370 | ip_select_ident(iph, &rt->u.dst, NULL); |
| 371 | |
| 372 | iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl); |
| 373 | } |
David L Stevens | 96793b4 | 2007-09-17 09:57:33 -0700 | [diff] [blame] | 374 | if (iph->protocol == IPPROTO_ICMP) |
| 375 | icmp_out_count(((struct icmphdr *) |
| 376 | skb_transport_header(skb))->type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | |
Patrick McHardy | 6e23ae2 | 2007-11-19 18:53:30 -0800 | [diff] [blame] | 378 | err = NF_HOOK(PF_INET, NF_INET_LOCAL_OUT, skb, NULL, rt->u.dst.dev, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | dst_output); |
| 380 | if (err > 0) |
| 381 | err = inet->recverr ? net_xmit_errno(err) : 0; |
| 382 | if (err) |
| 383 | goto error; |
| 384 | out: |
| 385 | return 0; |
| 386 | |
| 387 | error_fault: |
| 388 | err = -EFAULT; |
| 389 | kfree_skb(skb); |
| 390 | error: |
| 391 | IP_INC_STATS(IPSTATS_MIB_OUTDISCARDS); |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 392 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | } |
| 394 | |
Heiko Carstens | a27b58f | 2006-10-30 15:06:12 -0800 | [diff] [blame] | 395 | static int raw_probe_proto_opt(struct flowi *fl, struct msghdr *msg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | { |
| 397 | struct iovec *iov; |
| 398 | u8 __user *type = NULL; |
| 399 | u8 __user *code = NULL; |
| 400 | int probed = 0; |
Jesper Juhl | 93765d8 | 2005-06-18 23:00:15 -0700 | [diff] [blame] | 401 | unsigned int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | |
| 403 | if (!msg->msg_iov) |
Heiko Carstens | a27b58f | 2006-10-30 15:06:12 -0800 | [diff] [blame] | 404 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | |
| 406 | for (i = 0; i < msg->msg_iovlen; i++) { |
| 407 | iov = &msg->msg_iov[i]; |
| 408 | if (!iov) |
| 409 | continue; |
| 410 | |
| 411 | switch (fl->proto) { |
| 412 | case IPPROTO_ICMP: |
| 413 | /* check if one-byte field is readable or not. */ |
| 414 | if (iov->iov_base && iov->iov_len < 1) |
| 415 | break; |
| 416 | |
| 417 | if (!type) { |
| 418 | type = iov->iov_base; |
| 419 | /* check if code field is readable or not. */ |
| 420 | if (iov->iov_len > 1) |
| 421 | code = type + 1; |
| 422 | } else if (!code) |
| 423 | code = iov->iov_base; |
| 424 | |
| 425 | if (type && code) { |
Heiko Carstens | a27b58f | 2006-10-30 15:06:12 -0800 | [diff] [blame] | 426 | if (get_user(fl->fl_icmp_type, type) || |
| 427 | get_user(fl->fl_icmp_code, code)) |
| 428 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | probed = 1; |
| 430 | } |
| 431 | break; |
| 432 | default: |
| 433 | probed = 1; |
| 434 | break; |
| 435 | } |
| 436 | if (probed) |
| 437 | break; |
| 438 | } |
Heiko Carstens | a27b58f | 2006-10-30 15:06:12 -0800 | [diff] [blame] | 439 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | } |
| 441 | |
| 442 | static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, |
| 443 | size_t len) |
| 444 | { |
| 445 | struct inet_sock *inet = inet_sk(sk); |
| 446 | struct ipcm_cookie ipc; |
| 447 | struct rtable *rt = NULL; |
| 448 | int free = 0; |
Al Viro | 3ca3c68 | 2006-09-27 18:28:07 -0700 | [diff] [blame] | 449 | __be32 daddr; |
Al Viro | c1d18f9 | 2006-09-27 18:28:28 -0700 | [diff] [blame] | 450 | __be32 saddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | u8 tos; |
| 452 | int err; |
| 453 | |
| 454 | err = -EMSGSIZE; |
Jesper Juhl | 926d4b8 | 2005-06-18 23:00:00 -0700 | [diff] [blame] | 455 | if (len > 0xFFFF) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | goto out; |
| 457 | |
| 458 | /* |
| 459 | * Check the flags. |
| 460 | */ |
| 461 | |
| 462 | err = -EOPNOTSUPP; |
| 463 | if (msg->msg_flags & MSG_OOB) /* Mirror BSD error message */ |
| 464 | goto out; /* compatibility */ |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 465 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | /* |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 467 | * Get and verify the address. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | */ |
| 469 | |
| 470 | if (msg->msg_namelen) { |
| 471 | struct sockaddr_in *usin = (struct sockaddr_in*)msg->msg_name; |
| 472 | err = -EINVAL; |
| 473 | if (msg->msg_namelen < sizeof(*usin)) |
| 474 | goto out; |
| 475 | if (usin->sin_family != AF_INET) { |
| 476 | static int complained; |
| 477 | if (!complained++) |
| 478 | printk(KERN_INFO "%s forgot to set AF_INET in " |
| 479 | "raw sendmsg. Fix it!\n", |
| 480 | current->comm); |
| 481 | err = -EAFNOSUPPORT; |
| 482 | if (usin->sin_family) |
| 483 | goto out; |
| 484 | } |
| 485 | daddr = usin->sin_addr.s_addr; |
| 486 | /* ANK: I did not forget to get protocol from port field. |
| 487 | * I just do not know, who uses this weirdness. |
| 488 | * IP_HDRINCL is much more convenient. |
| 489 | */ |
| 490 | } else { |
| 491 | err = -EDESTADDRREQ; |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 492 | if (sk->sk_state != TCP_ESTABLISHED) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | goto out; |
| 494 | daddr = inet->daddr; |
| 495 | } |
| 496 | |
| 497 | ipc.addr = inet->saddr; |
| 498 | ipc.opt = NULL; |
| 499 | ipc.oif = sk->sk_bound_dev_if; |
| 500 | |
| 501 | if (msg->msg_controllen) { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 502 | err = ip_cmsg_send(sock_net(sk), msg, &ipc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | if (err) |
| 504 | goto out; |
| 505 | if (ipc.opt) |
| 506 | free = 1; |
| 507 | } |
| 508 | |
| 509 | saddr = ipc.addr; |
| 510 | ipc.addr = daddr; |
| 511 | |
| 512 | if (!ipc.opt) |
| 513 | ipc.opt = inet->opt; |
| 514 | |
| 515 | if (ipc.opt) { |
| 516 | err = -EINVAL; |
| 517 | /* Linux does not mangle headers on raw sockets, |
| 518 | * so that IP options + IP_HDRINCL is non-sense. |
| 519 | */ |
| 520 | if (inet->hdrincl) |
| 521 | goto done; |
| 522 | if (ipc.opt->srr) { |
| 523 | if (!daddr) |
| 524 | goto done; |
| 525 | daddr = ipc.opt->faddr; |
| 526 | } |
| 527 | } |
| 528 | tos = RT_CONN_FLAGS(sk); |
| 529 | if (msg->msg_flags & MSG_DONTROUTE) |
| 530 | tos |= RTO_ONLINK; |
| 531 | |
Joe Perches | f97c1e0 | 2007-12-16 13:45:43 -0800 | [diff] [blame] | 532 | if (ipv4_is_multicast(daddr)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | if (!ipc.oif) |
| 534 | ipc.oif = inet->mc_index; |
| 535 | if (!saddr) |
| 536 | saddr = inet->mc_addr; |
| 537 | } |
| 538 | |
| 539 | { |
| 540 | struct flowi fl = { .oif = ipc.oif, |
Laszlo Attila Toth | 4a19ec5 | 2008-01-30 19:08:16 -0800 | [diff] [blame] | 541 | .mark = sk->sk_mark, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | .nl_u = { .ip4_u = |
| 543 | { .daddr = daddr, |
| 544 | .saddr = saddr, |
| 545 | .tos = tos } }, |
| 546 | .proto = inet->hdrincl ? IPPROTO_RAW : |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 547 | sk->sk_protocol, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | }; |
Heiko Carstens | a27b58f | 2006-10-30 15:06:12 -0800 | [diff] [blame] | 549 | if (!inet->hdrincl) { |
| 550 | err = raw_probe_proto_opt(&fl, msg); |
| 551 | if (err) |
| 552 | goto done; |
| 553 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | |
Venkat Yekkirala | beb8d13 | 2006-08-04 23:12:42 -0700 | [diff] [blame] | 555 | security_sk_classify_flow(sk, &fl); |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 556 | err = ip_route_output_flow(sock_net(sk), &rt, &fl, sk, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | } |
| 558 | if (err) |
| 559 | goto done; |
| 560 | |
| 561 | err = -EACCES; |
| 562 | if (rt->rt_flags & RTCF_BROADCAST && !sock_flag(sk, SOCK_BROADCAST)) |
| 563 | goto done; |
| 564 | |
| 565 | if (msg->msg_flags & MSG_CONFIRM) |
| 566 | goto do_confirm; |
| 567 | back_from_confirm: |
| 568 | |
| 569 | if (inet->hdrincl) |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 570 | err = raw_send_hdrinc(sk, msg->msg_iov, len, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | rt, msg->msg_flags); |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 572 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | else { |
| 574 | if (!ipc.addr) |
| 575 | ipc.addr = rt->rt_dst; |
| 576 | lock_sock(sk); |
| 577 | err = ip_append_data(sk, ip_generic_getfrag, msg->msg_iov, len, 0, |
| 578 | &ipc, rt, msg->msg_flags); |
| 579 | if (err) |
| 580 | ip_flush_pending_frames(sk); |
| 581 | else if (!(msg->msg_flags & MSG_MORE)) |
| 582 | err = ip_push_pending_frames(sk); |
| 583 | release_sock(sk); |
| 584 | } |
| 585 | done: |
| 586 | if (free) |
| 587 | kfree(ipc.opt); |
| 588 | ip_rt_put(rt); |
| 589 | |
Jesper Juhl | 5418c69 | 2005-06-18 22:59:45 -0700 | [diff] [blame] | 590 | out: |
| 591 | if (err < 0) |
| 592 | return err; |
| 593 | return len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | |
| 595 | do_confirm: |
| 596 | dst_confirm(&rt->u.dst); |
| 597 | if (!(msg->msg_flags & MSG_PROBE) || len) |
| 598 | goto back_from_confirm; |
| 599 | err = 0; |
| 600 | goto done; |
| 601 | } |
| 602 | |
| 603 | static void raw_close(struct sock *sk, long timeout) |
| 604 | { |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 605 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | * Raw sockets may have direct kernel refereneces. Kill them. |
| 607 | */ |
| 608 | ip_ra_control(sk, 0, NULL); |
| 609 | |
| 610 | sk_common_release(sk); |
| 611 | } |
| 612 | |
| 613 | /* This gets rid of all the nasties in af_inet. -DaveM */ |
| 614 | static int raw_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len) |
| 615 | { |
| 616 | struct inet_sock *inet = inet_sk(sk); |
| 617 | struct sockaddr_in *addr = (struct sockaddr_in *) uaddr; |
| 618 | int ret = -EINVAL; |
| 619 | int chk_addr_ret; |
| 620 | |
| 621 | if (sk->sk_state != TCP_CLOSE || addr_len < sizeof(struct sockaddr_in)) |
| 622 | goto out; |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 623 | 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] | 624 | ret = -EADDRNOTAVAIL; |
| 625 | if (addr->sin_addr.s_addr && chk_addr_ret != RTN_LOCAL && |
| 626 | chk_addr_ret != RTN_MULTICAST && chk_addr_ret != RTN_BROADCAST) |
| 627 | goto out; |
| 628 | inet->rcv_saddr = inet->saddr = addr->sin_addr.s_addr; |
| 629 | if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST) |
| 630 | inet->saddr = 0; /* Use device */ |
| 631 | sk_dst_reset(sk); |
| 632 | ret = 0; |
| 633 | out: return ret; |
| 634 | } |
| 635 | |
| 636 | /* |
| 637 | * This should be easy, if there is something there |
| 638 | * we return it, otherwise we block. |
| 639 | */ |
| 640 | |
| 641 | static int raw_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, |
| 642 | size_t len, int noblock, int flags, int *addr_len) |
| 643 | { |
| 644 | struct inet_sock *inet = inet_sk(sk); |
| 645 | size_t copied = 0; |
| 646 | int err = -EOPNOTSUPP; |
| 647 | struct sockaddr_in *sin = (struct sockaddr_in *)msg->msg_name; |
| 648 | struct sk_buff *skb; |
| 649 | |
| 650 | if (flags & MSG_OOB) |
| 651 | goto out; |
| 652 | |
| 653 | if (addr_len) |
| 654 | *addr_len = sizeof(*sin); |
| 655 | |
| 656 | if (flags & MSG_ERRQUEUE) { |
| 657 | err = ip_recv_error(sk, msg, len); |
| 658 | goto out; |
| 659 | } |
| 660 | |
| 661 | skb = skb_recv_datagram(sk, flags, noblock, &err); |
| 662 | if (!skb) |
| 663 | goto out; |
| 664 | |
| 665 | copied = skb->len; |
| 666 | if (len < copied) { |
| 667 | msg->msg_flags |= MSG_TRUNC; |
| 668 | copied = len; |
| 669 | } |
| 670 | |
| 671 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
| 672 | if (err) |
| 673 | goto done; |
| 674 | |
| 675 | sock_recv_timestamp(msg, sk, skb); |
| 676 | |
| 677 | /* Copy the address. */ |
| 678 | if (sin) { |
| 679 | sin->sin_family = AF_INET; |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 680 | sin->sin_addr.s_addr = ip_hdr(skb)->saddr; |
Tetsuo Handa | f59fc7f | 2006-07-25 17:05:35 -0700 | [diff] [blame] | 681 | sin->sin_port = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); |
| 683 | } |
| 684 | if (inet->cmsg_flags) |
| 685 | ip_cmsg_recv(msg, skb); |
| 686 | if (flags & MSG_TRUNC) |
| 687 | copied = skb->len; |
| 688 | done: |
| 689 | skb_free_datagram(sk, skb); |
Jesper Juhl | 5418c69 | 2005-06-18 22:59:45 -0700 | [diff] [blame] | 690 | out: |
| 691 | if (err) |
| 692 | return err; |
| 693 | return copied; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | } |
| 695 | |
| 696 | static int raw_init(struct sock *sk) |
| 697 | { |
| 698 | struct raw_sock *rp = raw_sk(sk); |
| 699 | |
| 700 | if (inet_sk(sk)->num == IPPROTO_ICMP) |
| 701 | memset(&rp->filter, 0, sizeof(rp->filter)); |
| 702 | return 0; |
| 703 | } |
| 704 | |
| 705 | static int raw_seticmpfilter(struct sock *sk, char __user *optval, int optlen) |
| 706 | { |
| 707 | if (optlen > sizeof(struct icmp_filter)) |
| 708 | optlen = sizeof(struct icmp_filter); |
| 709 | if (copy_from_user(&raw_sk(sk)->filter, optval, optlen)) |
| 710 | return -EFAULT; |
| 711 | return 0; |
| 712 | } |
| 713 | |
| 714 | static int raw_geticmpfilter(struct sock *sk, char __user *optval, int __user *optlen) |
| 715 | { |
| 716 | int len, ret = -EFAULT; |
| 717 | |
| 718 | if (get_user(len, optlen)) |
| 719 | goto out; |
| 720 | ret = -EINVAL; |
| 721 | if (len < 0) |
| 722 | goto out; |
| 723 | if (len > sizeof(struct icmp_filter)) |
| 724 | len = sizeof(struct icmp_filter); |
| 725 | ret = -EFAULT; |
| 726 | if (put_user(len, optlen) || |
| 727 | copy_to_user(optval, &raw_sk(sk)->filter, len)) |
| 728 | goto out; |
| 729 | ret = 0; |
| 730 | out: return ret; |
| 731 | } |
| 732 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 733 | static int do_raw_setsockopt(struct sock *sk, int level, int optname, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | char __user *optval, int optlen) |
| 735 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | if (optname == ICMP_FILTER) { |
| 737 | if (inet_sk(sk)->num != IPPROTO_ICMP) |
| 738 | return -EOPNOTSUPP; |
| 739 | else |
| 740 | return raw_seticmpfilter(sk, optval, optlen); |
| 741 | } |
| 742 | return -ENOPROTOOPT; |
| 743 | } |
| 744 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 745 | static int raw_setsockopt(struct sock *sk, int level, int optname, |
| 746 | char __user *optval, int optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | { |
| 748 | if (level != SOL_RAW) |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 749 | return ip_setsockopt(sk, level, optname, optval, optlen); |
| 750 | return do_raw_setsockopt(sk, level, optname, optval, optlen); |
| 751 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 753 | #ifdef CONFIG_COMPAT |
| 754 | static int compat_raw_setsockopt(struct sock *sk, int level, int optname, |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 755 | char __user *optval, int optlen) |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 756 | { |
| 757 | if (level != SOL_RAW) |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 758 | return compat_ip_setsockopt(sk, level, optname, optval, optlen); |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 759 | return do_raw_setsockopt(sk, level, optname, optval, optlen); |
| 760 | } |
| 761 | #endif |
| 762 | |
| 763 | static int do_raw_getsockopt(struct sock *sk, int level, int optname, |
| 764 | char __user *optval, int __user *optlen) |
| 765 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | if (optname == ICMP_FILTER) { |
| 767 | if (inet_sk(sk)->num != IPPROTO_ICMP) |
| 768 | return -EOPNOTSUPP; |
| 769 | else |
| 770 | return raw_geticmpfilter(sk, optval, optlen); |
| 771 | } |
| 772 | return -ENOPROTOOPT; |
| 773 | } |
| 774 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 775 | static int raw_getsockopt(struct sock *sk, int level, int optname, |
| 776 | char __user *optval, int __user *optlen) |
| 777 | { |
| 778 | if (level != SOL_RAW) |
| 779 | return ip_getsockopt(sk, level, optname, optval, optlen); |
| 780 | return do_raw_getsockopt(sk, level, optname, optval, optlen); |
| 781 | } |
| 782 | |
| 783 | #ifdef CONFIG_COMPAT |
| 784 | static int compat_raw_getsockopt(struct sock *sk, int level, int optname, |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 785 | char __user *optval, int __user *optlen) |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 786 | { |
| 787 | if (level != SOL_RAW) |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 788 | return compat_ip_getsockopt(sk, level, optname, optval, optlen); |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 789 | return do_raw_getsockopt(sk, level, optname, optval, optlen); |
| 790 | } |
| 791 | #endif |
| 792 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | static int raw_ioctl(struct sock *sk, int cmd, unsigned long arg) |
| 794 | { |
| 795 | switch (cmd) { |
| 796 | case SIOCOUTQ: { |
| 797 | int amount = atomic_read(&sk->sk_wmem_alloc); |
| 798 | return put_user(amount, (int __user *)arg); |
| 799 | } |
| 800 | case SIOCINQ: { |
| 801 | struct sk_buff *skb; |
| 802 | int amount = 0; |
| 803 | |
Herbert Xu | e0f9f85 | 2005-06-18 22:56:18 -0700 | [diff] [blame] | 804 | spin_lock_bh(&sk->sk_receive_queue.lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | skb = skb_peek(&sk->sk_receive_queue); |
| 806 | if (skb != NULL) |
| 807 | amount = skb->len; |
Herbert Xu | e0f9f85 | 2005-06-18 22:56:18 -0700 | [diff] [blame] | 808 | spin_unlock_bh(&sk->sk_receive_queue.lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | return put_user(amount, (int __user *)arg); |
| 810 | } |
| 811 | |
| 812 | default: |
| 813 | #ifdef CONFIG_IP_MROUTE |
| 814 | return ipmr_ioctl(sk, cmd, (void __user *)arg); |
| 815 | #else |
| 816 | return -ENOIOCTLCMD; |
| 817 | #endif |
| 818 | } |
| 819 | } |
| 820 | |
| 821 | struct proto raw_prot = { |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 822 | .name = "RAW", |
| 823 | .owner = THIS_MODULE, |
| 824 | .close = raw_close, |
| 825 | .connect = ip4_datagram_connect, |
| 826 | .disconnect = udp_disconnect, |
| 827 | .ioctl = raw_ioctl, |
| 828 | .init = raw_init, |
| 829 | .setsockopt = raw_setsockopt, |
| 830 | .getsockopt = raw_getsockopt, |
| 831 | .sendmsg = raw_sendmsg, |
| 832 | .recvmsg = raw_recvmsg, |
| 833 | .bind = raw_bind, |
| 834 | .backlog_rcv = raw_rcv_skb, |
Pavel Emelyanov | fc8717b | 2008-03-22 16:56:51 -0700 | [diff] [blame] | 835 | .hash = raw_hash_sk, |
| 836 | .unhash = raw_unhash_sk, |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 837 | .obj_size = sizeof(struct raw_sock), |
Pavel Emelyanov | fc8717b | 2008-03-22 16:56:51 -0700 | [diff] [blame] | 838 | .h.raw_hash = &raw_v4_hashinfo, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 839 | #ifdef CONFIG_COMPAT |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 840 | .compat_setsockopt = compat_raw_setsockopt, |
| 841 | .compat_getsockopt = compat_raw_getsockopt, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 842 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 843 | }; |
| 844 | |
| 845 | #ifdef CONFIG_PROC_FS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | static struct sock *raw_get_first(struct seq_file *seq) |
| 847 | { |
| 848 | struct sock *sk; |
| 849 | struct raw_iter_state* state = raw_seq_private(seq); |
| 850 | |
Pavel Emelyanov | b673e4d | 2007-11-19 22:36:45 -0800 | [diff] [blame] | 851 | for (state->bucket = 0; state->bucket < RAW_HTABLE_SIZE; |
| 852 | ++state->bucket) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | struct hlist_node *node; |
| 854 | |
Pavel Emelyanov | 42a7380 | 2007-11-19 22:38:33 -0800 | [diff] [blame] | 855 | sk_for_each(sk, node, &state->h->ht[state->bucket]) |
YOSHIFUJI Hideaki | 1218854 | 2008-03-26 02:36:06 +0900 | [diff] [blame] | 856 | if (sock_net(sk) == seq_file_net(seq)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 857 | goto found; |
| 858 | } |
| 859 | sk = NULL; |
| 860 | found: |
| 861 | return sk; |
| 862 | } |
| 863 | |
| 864 | static struct sock *raw_get_next(struct seq_file *seq, struct sock *sk) |
| 865 | { |
| 866 | struct raw_iter_state* state = raw_seq_private(seq); |
| 867 | |
| 868 | do { |
| 869 | sk = sk_next(sk); |
| 870 | try_again: |
| 871 | ; |
YOSHIFUJI Hideaki | 1218854 | 2008-03-26 02:36:06 +0900 | [diff] [blame] | 872 | } while (sk && sock_net(sk) != seq_file_net(seq)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 873 | |
Pavel Emelyanov | b673e4d | 2007-11-19 22:36:45 -0800 | [diff] [blame] | 874 | if (!sk && ++state->bucket < RAW_HTABLE_SIZE) { |
Pavel Emelyanov | 42a7380 | 2007-11-19 22:38:33 -0800 | [diff] [blame] | 875 | sk = sk_head(&state->h->ht[state->bucket]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 876 | goto try_again; |
| 877 | } |
| 878 | return sk; |
| 879 | } |
| 880 | |
| 881 | static struct sock *raw_get_idx(struct seq_file *seq, loff_t pos) |
| 882 | { |
| 883 | struct sock *sk = raw_get_first(seq); |
| 884 | |
| 885 | if (sk) |
| 886 | while (pos && (sk = raw_get_next(seq, sk)) != NULL) |
| 887 | --pos; |
| 888 | return pos ? NULL : sk; |
| 889 | } |
| 890 | |
Pavel Emelyanov | 42a7380 | 2007-11-19 22:38:33 -0800 | [diff] [blame] | 891 | void *raw_seq_start(struct seq_file *seq, loff_t *pos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | { |
Pavel Emelyanov | 42a7380 | 2007-11-19 22:38:33 -0800 | [diff] [blame] | 893 | struct raw_iter_state *state = raw_seq_private(seq); |
| 894 | |
| 895 | read_lock(&state->h->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 896 | return *pos ? raw_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; |
| 897 | } |
Pavel Emelyanov | 42a7380 | 2007-11-19 22:38:33 -0800 | [diff] [blame] | 898 | EXPORT_SYMBOL_GPL(raw_seq_start); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 899 | |
Pavel Emelyanov | 42a7380 | 2007-11-19 22:38:33 -0800 | [diff] [blame] | 900 | void *raw_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 901 | { |
| 902 | struct sock *sk; |
| 903 | |
| 904 | if (v == SEQ_START_TOKEN) |
| 905 | sk = raw_get_first(seq); |
| 906 | else |
| 907 | sk = raw_get_next(seq, v); |
| 908 | ++*pos; |
| 909 | return sk; |
| 910 | } |
Pavel Emelyanov | 42a7380 | 2007-11-19 22:38:33 -0800 | [diff] [blame] | 911 | EXPORT_SYMBOL_GPL(raw_seq_next); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 912 | |
Pavel Emelyanov | 42a7380 | 2007-11-19 22:38:33 -0800 | [diff] [blame] | 913 | void raw_seq_stop(struct seq_file *seq, void *v) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | { |
Pavel Emelyanov | 42a7380 | 2007-11-19 22:38:33 -0800 | [diff] [blame] | 915 | struct raw_iter_state *state = raw_seq_private(seq); |
| 916 | |
| 917 | read_unlock(&state->h->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | } |
Pavel Emelyanov | 42a7380 | 2007-11-19 22:38:33 -0800 | [diff] [blame] | 919 | EXPORT_SYMBOL_GPL(raw_seq_stop); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 920 | |
Denis V. Lunev | 8cd850e | 2008-01-31 03:46:43 -0800 | [diff] [blame] | 921 | static void raw_sock_seq_show(struct seq_file *seq, struct sock *sp, int i) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 922 | { |
| 923 | struct inet_sock *inet = inet_sk(sp); |
Al Viro | 714e85b | 2006-11-14 20:51:49 -0800 | [diff] [blame] | 924 | __be32 dest = inet->daddr, |
| 925 | src = inet->rcv_saddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 926 | __u16 destp = 0, |
| 927 | srcp = inet->num; |
| 928 | |
Denis V. Lunev | 8cd850e | 2008-01-31 03:46:43 -0800 | [diff] [blame] | 929 | seq_printf(seq, "%4d: %08X:%04X %08X:%04X" |
Wang Chen | 33c732c | 2007-11-13 20:30:01 -0800 | [diff] [blame] | 930 | " %02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d", |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 931 | i, src, srcp, dest, destp, sp->sk_state, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | atomic_read(&sp->sk_wmem_alloc), |
| 933 | atomic_read(&sp->sk_rmem_alloc), |
| 934 | 0, 0L, 0, sock_i_uid(sp), 0, sock_i_ino(sp), |
Wang Chen | 33c732c | 2007-11-13 20:30:01 -0800 | [diff] [blame] | 935 | atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | } |
| 937 | |
| 938 | static int raw_seq_show(struct seq_file *seq, void *v) |
| 939 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 940 | if (v == SEQ_START_TOKEN) |
Denis V. Lunev | 8cd850e | 2008-01-31 03:46:43 -0800 | [diff] [blame] | 941 | seq_printf(seq, " sl local_address rem_address st tx_queue " |
| 942 | "rx_queue tr tm->when retrnsmt uid timeout " |
| 943 | "inode drops\n"); |
| 944 | else |
| 945 | raw_sock_seq_show(seq, v, raw_seq_private(seq)->bucket); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 946 | return 0; |
| 947 | } |
| 948 | |
Stephen Hemminger | f690808 | 2007-03-12 14:34:29 -0700 | [diff] [blame] | 949 | static const struct seq_operations raw_seq_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 950 | .start = raw_seq_start, |
| 951 | .next = raw_seq_next, |
| 952 | .stop = raw_seq_stop, |
| 953 | .show = raw_seq_show, |
| 954 | }; |
| 955 | |
Denis V. Lunev | 3046d76 | 2008-01-31 03:48:55 -0800 | [diff] [blame] | 956 | int raw_seq_open(struct inode *ino, struct file *file, |
| 957 | struct raw_hashinfo *h, const struct seq_operations *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | { |
Pavel Emelyanov | f51d599 | 2008-01-14 05:35:57 -0800 | [diff] [blame] | 959 | int err; |
Pavel Emelyanov | 42a7380 | 2007-11-19 22:38:33 -0800 | [diff] [blame] | 960 | struct raw_iter_state *i; |
| 961 | |
Denis V. Lunev | 3046d76 | 2008-01-31 03:48:55 -0800 | [diff] [blame] | 962 | err = seq_open_net(ino, file, ops, sizeof(struct raw_iter_state)); |
Pavel Emelyanov | f51d599 | 2008-01-14 05:35:57 -0800 | [diff] [blame] | 963 | if (err < 0) |
| 964 | return err; |
Pavel Emelyanov | 42a7380 | 2007-11-19 22:38:33 -0800 | [diff] [blame] | 965 | |
Pavel Emelyanov | f51d599 | 2008-01-14 05:35:57 -0800 | [diff] [blame] | 966 | i = raw_seq_private((struct seq_file *)file->private_data); |
Pavel Emelyanov | 42a7380 | 2007-11-19 22:38:33 -0800 | [diff] [blame] | 967 | i->h = h; |
Pavel Emelyanov | 42a7380 | 2007-11-19 22:38:33 -0800 | [diff] [blame] | 968 | return 0; |
| 969 | } |
| 970 | EXPORT_SYMBOL_GPL(raw_seq_open); |
| 971 | |
| 972 | static int raw_v4_seq_open(struct inode *inode, struct file *file) |
| 973 | { |
Denis V. Lunev | 3046d76 | 2008-01-31 03:48:55 -0800 | [diff] [blame] | 974 | return raw_seq_open(inode, file, &raw_v4_hashinfo, &raw_seq_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | } |
| 976 | |
Arjan van de Ven | 9a32144 | 2007-02-12 00:55:35 -0800 | [diff] [blame] | 977 | static const struct file_operations raw_seq_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 978 | .owner = THIS_MODULE, |
Pavel Emelyanov | 42a7380 | 2007-11-19 22:38:33 -0800 | [diff] [blame] | 979 | .open = raw_v4_seq_open, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | .read = seq_read, |
| 981 | .llseek = seq_lseek, |
Pavel Emelyanov | f51d599 | 2008-01-14 05:35:57 -0800 | [diff] [blame] | 982 | .release = seq_release_net, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | }; |
| 984 | |
Pavel Emelyanov | a308da1 | 2008-01-14 05:36:50 -0800 | [diff] [blame] | 985 | static __net_init int raw_init_net(struct net *net) |
| 986 | { |
| 987 | if (!proc_net_fops_create(net, "raw", S_IRUGO, &raw_seq_fops)) |
| 988 | return -ENOMEM; |
| 989 | |
| 990 | return 0; |
| 991 | } |
| 992 | |
| 993 | static __net_exit void raw_exit_net(struct net *net) |
| 994 | { |
| 995 | proc_net_remove(net, "raw"); |
| 996 | } |
| 997 | |
| 998 | static __net_initdata struct pernet_operations raw_net_ops = { |
| 999 | .init = raw_init_net, |
| 1000 | .exit = raw_exit_net, |
| 1001 | }; |
| 1002 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1003 | int __init raw_proc_init(void) |
| 1004 | { |
Pavel Emelyanov | a308da1 | 2008-01-14 05:36:50 -0800 | [diff] [blame] | 1005 | return register_pernet_subsys(&raw_net_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1006 | } |
| 1007 | |
| 1008 | void __init raw_proc_exit(void) |
| 1009 | { |
Pavel Emelyanov | a308da1 | 2008-01-14 05:36:50 -0800 | [diff] [blame] | 1010 | unregister_pernet_subsys(&raw_net_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1011 | } |
| 1012 | #endif /* CONFIG_PROC_FS */ |