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 | * |
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 | * |
| 11 | * Fixes: |
| 12 | * Alan Cox : verify_area() fixed up |
| 13 | * Alan Cox : ICMP error handling |
| 14 | * Alan Cox : EMSGSIZE if you send too big a packet |
| 15 | * Alan Cox : Now uses generic datagrams and shared |
| 16 | * skbuff library. No more peek crashes, |
| 17 | * no more backlogs |
| 18 | * Alan Cox : Checks sk->broadcast. |
| 19 | * Alan Cox : Uses skb_free_datagram/skb_copy_datagram |
| 20 | * Alan Cox : Raw passes ip options too |
| 21 | * Alan Cox : Setsocketopt added |
| 22 | * Alan Cox : Fixed error return for broadcasts |
| 23 | * Alan Cox : Removed wake_up calls |
| 24 | * Alan Cox : Use ttl/tos |
| 25 | * Alan Cox : Cleaned up old debugging |
| 26 | * Alan Cox : Use new kernel side addresses |
| 27 | * Arnt Gulbrandsen : Fixed MSG_DONTROUTE in raw sockets. |
| 28 | * Alan Cox : BSD style RAW socket demultiplexing. |
| 29 | * Alan Cox : Beginnings of mrouted support. |
| 30 | * Alan Cox : Added IP_HDRINCL option. |
| 31 | * Alan Cox : Skip broadcast check if BSDism set. |
| 32 | * David S. Miller : New socket lookup architecture. |
| 33 | * |
| 34 | * This program is free software; you can redistribute it and/or |
| 35 | * modify it under the terms of the GNU General Public License |
| 36 | * as published by the Free Software Foundation; either version |
| 37 | * 2 of the License, or (at your option) any later version. |
| 38 | */ |
Dave Jones | bf0d524 | 2006-09-22 14:00:29 -0700 | [diff] [blame] | 39 | |
Alan Cox | 715b49e | 2006-01-18 17:44:07 -0800 | [diff] [blame] | 40 | #include <linux/types.h> |
Arun Sharma | 60063497 | 2011-07-26 16:09:06 -0700 | [diff] [blame] | 41 | #include <linux/atomic.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | #include <asm/byteorder.h> |
| 43 | #include <asm/current.h> |
| 44 | #include <asm/uaccess.h> |
| 45 | #include <asm/ioctls.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | #include <linux/stddef.h> |
| 47 | #include <linux/slab.h> |
| 48 | #include <linux/errno.h> |
| 49 | #include <linux/aio.h> |
| 50 | #include <linux/kernel.h> |
Paul Gortmaker | bc3b2d7 | 2011-07-15 11:47:34 -0400 | [diff] [blame] | 51 | #include <linux/export.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | #include <linux/spinlock.h> |
| 53 | #include <linux/sockios.h> |
| 54 | #include <linux/socket.h> |
| 55 | #include <linux/in.h> |
| 56 | #include <linux/mroute.h> |
| 57 | #include <linux/netdevice.h> |
| 58 | #include <linux/in_route.h> |
| 59 | #include <linux/route.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | #include <linux/skbuff.h> |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 61 | #include <net/net_namespace.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | #include <net/dst.h> |
| 63 | #include <net/sock.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | #include <linux/ip.h> |
| 65 | #include <linux/net.h> |
| 66 | #include <net/ip.h> |
| 67 | #include <net/icmp.h> |
| 68 | #include <net/udp.h> |
| 69 | #include <net/raw.h> |
| 70 | #include <net/snmp.h> |
Arnaldo Carvalho de Melo | c752f07 | 2005-08-09 20:08:28 -0700 | [diff] [blame] | 71 | #include <net/tcp_states.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | #include <net/inet_common.h> |
| 73 | #include <net/checksum.h> |
| 74 | #include <net/xfrm.h> |
| 75 | #include <linux/rtnetlink.h> |
| 76 | #include <linux/proc_fs.h> |
| 77 | #include <linux/seq_file.h> |
| 78 | #include <linux/netfilter.h> |
| 79 | #include <linux/netfilter_ipv4.h> |
Eric W. Biederman | 709b46e | 2011-01-29 16:15:56 +0000 | [diff] [blame] | 80 | #include <linux/compat.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | |
Pavel Emelyanov | b673e4d | 2007-11-19 22:36:45 -0800 | [diff] [blame] | 82 | static struct raw_hashinfo raw_v4_hashinfo = { |
Robert P. J. Day | 938b93a | 2008-03-18 00:59:23 -0700 | [diff] [blame] | 83 | .lock = __RW_LOCK_UNLOCKED(raw_v4_hashinfo.lock), |
Pavel Emelyanov | b673e4d | 2007-11-19 22:36:45 -0800 | [diff] [blame] | 84 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | |
Pavel Emelyanov | fc8717b | 2008-03-22 16:56:51 -0700 | [diff] [blame] | 86 | void raw_hash_sk(struct sock *sk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | { |
Pavel Emelyanov | fc8717b | 2008-03-22 16:56:51 -0700 | [diff] [blame] | 88 | struct raw_hashinfo *h = sk->sk_prot->h.raw_hash; |
Pavel Emelyanov | 65b4c50 | 2007-11-19 22:37:24 -0800 | [diff] [blame] | 89 | struct hlist_head *head; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 91 | head = &h->ht[inet_sk(sk)->inet_num & (RAW_HTABLE_SIZE - 1)]; |
Pavel Emelyanov | 65b4c50 | 2007-11-19 22:37:24 -0800 | [diff] [blame] | 92 | |
| 93 | write_lock_bh(&h->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | sk_add_node(sk, head); |
Pavel Emelyanov | c29a0bc | 2008-03-31 19:41:46 -0700 | [diff] [blame] | 95 | sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1); |
Pavel Emelyanov | 65b4c50 | 2007-11-19 22:37:24 -0800 | [diff] [blame] | 96 | write_unlock_bh(&h->lock); |
| 97 | } |
| 98 | EXPORT_SYMBOL_GPL(raw_hash_sk); |
| 99 | |
Pavel Emelyanov | fc8717b | 2008-03-22 16:56:51 -0700 | [diff] [blame] | 100 | void raw_unhash_sk(struct sock *sk) |
Pavel Emelyanov | ab70768 | 2007-11-19 22:37:58 -0800 | [diff] [blame] | 101 | { |
Pavel Emelyanov | fc8717b | 2008-03-22 16:56:51 -0700 | [diff] [blame] | 102 | struct raw_hashinfo *h = sk->sk_prot->h.raw_hash; |
| 103 | |
Pavel Emelyanov | ab70768 | 2007-11-19 22:37:58 -0800 | [diff] [blame] | 104 | write_lock_bh(&h->lock); |
| 105 | if (sk_del_node_init(sk)) |
Pavel Emelyanov | c29a0bc | 2008-03-31 19:41:46 -0700 | [diff] [blame] | 106 | sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1); |
Pavel Emelyanov | ab70768 | 2007-11-19 22:37:58 -0800 | [diff] [blame] | 107 | write_unlock_bh(&h->lock); |
| 108 | } |
| 109 | EXPORT_SYMBOL_GPL(raw_unhash_sk); |
| 110 | |
Pavel Emelyanov | be18588 | 2008-01-14 05:35:31 -0800 | [diff] [blame] | 111 | static struct sock *__raw_v4_lookup(struct net *net, struct sock *sk, |
| 112 | unsigned short num, __be32 raddr, __be32 laddr, int dif) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | { |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 114 | sk_for_each_from(sk) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | struct inet_sock *inet = inet_sk(sk); |
| 116 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 117 | if (net_eq(sock_net(sk), net) && inet->inet_num == num && |
| 118 | !(inet->inet_daddr && inet->inet_daddr != raddr) && |
| 119 | !(inet->inet_rcv_saddr && inet->inet_rcv_saddr != laddr) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | !(sk->sk_bound_dev_if && sk->sk_bound_dev_if != dif)) |
| 121 | goto found; /* gotcha */ |
| 122 | } |
| 123 | sk = NULL; |
| 124 | found: |
| 125 | return sk; |
| 126 | } |
| 127 | |
| 128 | /* |
| 129 | * 0 - deliver |
| 130 | * 1 - block |
| 131 | */ |
Eric Dumazet | ab43ed8 | 2012-09-22 00:08:29 +0000 | [diff] [blame] | 132 | static int icmp_filter(const struct sock *sk, const struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | { |
Eric Dumazet | ab43ed8 | 2012-09-22 00:08:29 +0000 | [diff] [blame] | 134 | struct icmphdr _hdr; |
| 135 | const struct icmphdr *hdr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | |
Eric Dumazet | ab43ed8 | 2012-09-22 00:08:29 +0000 | [diff] [blame] | 137 | hdr = skb_header_pointer(skb, skb_transport_offset(skb), |
| 138 | sizeof(_hdr), &_hdr); |
| 139 | if (!hdr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | return 1; |
| 141 | |
Eric Dumazet | ab43ed8 | 2012-09-22 00:08:29 +0000 | [diff] [blame] | 142 | if (hdr->type < 32) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | __u32 data = raw_sk(sk)->filter.data; |
| 144 | |
Eric Dumazet | ab43ed8 | 2012-09-22 00:08:29 +0000 | [diff] [blame] | 145 | return ((1U << hdr->type) & data) != 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | } |
| 147 | |
| 148 | /* Do not block unknown ICMP types */ |
| 149 | return 0; |
| 150 | } |
| 151 | |
| 152 | /* IP input processing comes here for RAW socket delivery. |
| 153 | * Caller owns SKB, so we must make clones. |
| 154 | * |
| 155 | * RFC 1122: SHOULD pass TOS value up to the transport layer. |
| 156 | * -> It does. And not only TOS, but all IP header. |
| 157 | */ |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 158 | static int raw_v4_input(struct sk_buff *skb, const struct iphdr *iph, int hash) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | { |
| 160 | struct sock *sk; |
| 161 | struct hlist_head *head; |
Patrick McHardy | d13964f | 2005-08-09 19:45:02 -0700 | [diff] [blame] | 162 | int delivered = 0; |
Pavel Emelyanov | be18588 | 2008-01-14 05:35:31 -0800 | [diff] [blame] | 163 | struct net *net; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | |
Pavel Emelyanov | b673e4d | 2007-11-19 22:36:45 -0800 | [diff] [blame] | 165 | read_lock(&raw_v4_hashinfo.lock); |
| 166 | head = &raw_v4_hashinfo.ht[hash]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | if (hlist_empty(head)) |
| 168 | goto out; |
Pavel Emelyanov | be18588 | 2008-01-14 05:35:31 -0800 | [diff] [blame] | 169 | |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 170 | net = dev_net(skb->dev); |
Pavel Emelyanov | be18588 | 2008-01-14 05:35:31 -0800 | [diff] [blame] | 171 | sk = __raw_v4_lookup(net, __sk_head(head), iph->protocol, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | iph->saddr, iph->daddr, |
| 173 | skb->dev->ifindex); |
| 174 | |
| 175 | while (sk) { |
Patrick McHardy | d13964f | 2005-08-09 19:45:02 -0700 | [diff] [blame] | 176 | delivered = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | if (iph->protocol != IPPROTO_ICMP || !icmp_filter(sk, skb)) { |
| 178 | struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC); |
| 179 | |
| 180 | /* Not releasing hash table! */ |
| 181 | if (clone) |
| 182 | raw_rcv(sk, clone); |
| 183 | } |
Pavel Emelyanov | be18588 | 2008-01-14 05:35:31 -0800 | [diff] [blame] | 184 | sk = __raw_v4_lookup(net, sk_next(sk), iph->protocol, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | iph->saddr, iph->daddr, |
| 186 | skb->dev->ifindex); |
| 187 | } |
| 188 | out: |
Pavel Emelyanov | b673e4d | 2007-11-19 22:36:45 -0800 | [diff] [blame] | 189 | read_unlock(&raw_v4_hashinfo.lock); |
Patrick McHardy | d13964f | 2005-08-09 19:45:02 -0700 | [diff] [blame] | 190 | return delivered; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | } |
| 192 | |
Pavel Emelyanov | 7bc54c9 | 2007-11-19 22:35:07 -0800 | [diff] [blame] | 193 | int raw_local_deliver(struct sk_buff *skb, int protocol) |
| 194 | { |
| 195 | int hash; |
| 196 | struct sock *raw_sk; |
| 197 | |
Pavel Emelyanov | b673e4d | 2007-11-19 22:36:45 -0800 | [diff] [blame] | 198 | hash = protocol & (RAW_HTABLE_SIZE - 1); |
| 199 | raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]); |
Pavel Emelyanov | 7bc54c9 | 2007-11-19 22:35:07 -0800 | [diff] [blame] | 200 | |
| 201 | /* If there maybe a raw socket we must check - if not we |
| 202 | * don't care less |
| 203 | */ |
| 204 | if (raw_sk && !raw_v4_input(skb, ip_hdr(skb), hash)) |
| 205 | raw_sk = NULL; |
| 206 | |
| 207 | return raw_sk != NULL; |
| 208 | |
| 209 | } |
| 210 | |
| 211 | 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] | 212 | { |
| 213 | struct inet_sock *inet = inet_sk(sk); |
Arnaldo Carvalho de Melo | 88c7664 | 2007-03-13 14:43:18 -0300 | [diff] [blame] | 214 | const int type = icmp_hdr(skb)->type; |
| 215 | const int code = icmp_hdr(skb)->code; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | int err = 0; |
| 217 | int harderr = 0; |
| 218 | |
David S. Miller | 3639339 | 2012-06-14 22:21:46 -0700 | [diff] [blame] | 219 | if (type == ICMP_DEST_UNREACH && code == ICMP_FRAG_NEEDED) |
| 220 | ipv4_sk_update_pmtu(skb, sk, info); |
Duan Jiong | 8d65b11 | 2013-09-20 18:21:25 +0800 | [diff] [blame] | 221 | else if (type == ICMP_REDIRECT) { |
David S. Miller | 55be7a9 | 2012-07-11 21:27:49 -0700 | [diff] [blame] | 222 | ipv4_sk_redirect(skb, sk); |
Duan Jiong | 8d65b11 | 2013-09-20 18:21:25 +0800 | [diff] [blame] | 223 | return; |
| 224 | } |
David S. Miller | 3639339 | 2012-06-14 22:21:46 -0700 | [diff] [blame] | 225 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | /* Report error on raw socket, if: |
| 227 | 1. User requested ip_recverr. |
| 228 | 2. Socket is connected (otherwise the error indication |
| 229 | is useless without ip_recverr and error is hard. |
| 230 | */ |
| 231 | if (!inet->recverr && sk->sk_state != TCP_ESTABLISHED) |
| 232 | return; |
| 233 | |
| 234 | switch (type) { |
| 235 | default: |
| 236 | case ICMP_TIME_EXCEEDED: |
| 237 | err = EHOSTUNREACH; |
| 238 | break; |
| 239 | case ICMP_SOURCE_QUENCH: |
| 240 | return; |
| 241 | case ICMP_PARAMETERPROB: |
| 242 | err = EPROTO; |
| 243 | harderr = 1; |
| 244 | break; |
| 245 | case ICMP_DEST_UNREACH: |
| 246 | err = EHOSTUNREACH; |
| 247 | if (code > NR_ICMP_UNREACH) |
| 248 | break; |
| 249 | err = icmp_err_convert[code].errno; |
| 250 | harderr = icmp_err_convert[code].fatal; |
| 251 | if (code == ICMP_FRAG_NEEDED) { |
| 252 | harderr = inet->pmtudisc != IP_PMTUDISC_DONT; |
| 253 | err = EMSGSIZE; |
| 254 | } |
| 255 | } |
| 256 | |
| 257 | if (inet->recverr) { |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 258 | const struct iphdr *iph = (const struct iphdr *)skb->data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | u8 *payload = skb->data + (iph->ihl << 2); |
| 260 | |
| 261 | if (inet->hdrincl) |
| 262 | payload = skb->data; |
| 263 | ip_icmp_error(sk, skb, err, 0, info, payload); |
| 264 | } |
| 265 | |
| 266 | if (inet->recverr || harderr) { |
| 267 | sk->sk_err = err; |
| 268 | sk->sk_error_report(sk); |
| 269 | } |
| 270 | } |
| 271 | |
Pavel Emelyanov | 7bc54c9 | 2007-11-19 22:35:07 -0800 | [diff] [blame] | 272 | void raw_icmp_error(struct sk_buff *skb, int protocol, u32 info) |
| 273 | { |
| 274 | int hash; |
| 275 | struct sock *raw_sk; |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 276 | const struct iphdr *iph; |
Pavel Emelyanov | be18588 | 2008-01-14 05:35:31 -0800 | [diff] [blame] | 277 | struct net *net; |
Pavel Emelyanov | 7bc54c9 | 2007-11-19 22:35:07 -0800 | [diff] [blame] | 278 | |
Pavel Emelyanov | b673e4d | 2007-11-19 22:36:45 -0800 | [diff] [blame] | 279 | hash = protocol & (RAW_HTABLE_SIZE - 1); |
Pavel Emelyanov | 7bc54c9 | 2007-11-19 22:35:07 -0800 | [diff] [blame] | 280 | |
Pavel Emelyanov | b673e4d | 2007-11-19 22:36:45 -0800 | [diff] [blame] | 281 | read_lock(&raw_v4_hashinfo.lock); |
| 282 | raw_sk = sk_head(&raw_v4_hashinfo.ht[hash]); |
Pavel Emelyanov | 7bc54c9 | 2007-11-19 22:35:07 -0800 | [diff] [blame] | 283 | if (raw_sk != NULL) { |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 284 | iph = (const struct iphdr *)skb->data; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 285 | net = dev_net(skb->dev); |
Pavel Emelyanov | be18588 | 2008-01-14 05:35:31 -0800 | [diff] [blame] | 286 | |
| 287 | while ((raw_sk = __raw_v4_lookup(net, raw_sk, protocol, |
| 288 | iph->daddr, iph->saddr, |
Pavel Emelyanov | 7bc54c9 | 2007-11-19 22:35:07 -0800 | [diff] [blame] | 289 | skb->dev->ifindex)) != NULL) { |
| 290 | raw_err(raw_sk, skb, info); |
| 291 | raw_sk = sk_next(raw_sk); |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 292 | iph = (const struct iphdr *)skb->data; |
Pavel Emelyanov | 7bc54c9 | 2007-11-19 22:35:07 -0800 | [diff] [blame] | 293 | } |
| 294 | } |
Pavel Emelyanov | b673e4d | 2007-11-19 22:36:45 -0800 | [diff] [blame] | 295 | read_unlock(&raw_v4_hashinfo.lock); |
Pavel Emelyanov | 7bc54c9 | 2007-11-19 22:35:07 -0800 | [diff] [blame] | 296 | } |
| 297 | |
Daniel Baluta | 5e73ea1 | 2012-04-15 01:34:41 +0000 | [diff] [blame] | 298 | static int raw_rcv_skb(struct sock *sk, struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | { |
| 300 | /* Charge it to the socket. */ |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 301 | |
Shawn Bohrer | fbf8866 | 2013-10-07 11:01:40 -0500 | [diff] [blame] | 302 | ipv4_pktinfo_prepare(sk, skb); |
Eric Dumazet | d826eb1 | 2011-11-09 07:24:35 +0000 | [diff] [blame] | 303 | if (sock_queue_rcv_skb(sk, skb) < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | kfree_skb(skb); |
| 305 | return NET_RX_DROP; |
| 306 | } |
| 307 | |
| 308 | return NET_RX_SUCCESS; |
| 309 | } |
| 310 | |
| 311 | int raw_rcv(struct sock *sk, struct sk_buff *skb) |
| 312 | { |
| 313 | if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb)) { |
Wang Chen | 33c732c | 2007-11-13 20:30:01 -0800 | [diff] [blame] | 314 | atomic_inc(&sk->sk_drops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | kfree_skb(skb); |
| 316 | return NET_RX_DROP; |
| 317 | } |
Patrick McHardy | b59c270 | 2006-01-06 23:06:10 -0800 | [diff] [blame] | 318 | nf_reset(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | |
Arnaldo Carvalho de Melo | d56f90a | 2007-04-10 20:50:43 -0700 | [diff] [blame] | 320 | skb_push(skb, skb->data - skb_network_header(skb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | |
| 322 | raw_rcv_skb(sk, skb); |
| 323 | return 0; |
| 324 | } |
| 325 | |
David S. Miller | 77968b7 | 2011-05-08 17:12:19 -0700 | [diff] [blame] | 326 | static int raw_send_hdrinc(struct sock *sk, struct flowi4 *fl4, |
| 327 | void *from, size_t length, |
| 328 | struct rtable **rtp, |
| 329 | unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | { |
| 331 | struct inet_sock *inet = inet_sk(sk); |
Pavel Emelyanov | 0388b00 | 2008-07-14 23:00:43 -0700 | [diff] [blame] | 332 | struct net *net = sock_net(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | struct iphdr *iph; |
| 334 | struct sk_buff *skb; |
Herbert Xu | f844c74 | 2008-01-05 23:14:44 -0800 | [diff] [blame] | 335 | unsigned int iphlen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | int err; |
Eric Dumazet | 1789a64 | 2010-06-03 22:23:57 +0000 | [diff] [blame] | 337 | struct rtable *rt = *rtp; |
Herbert Xu | 6608824 | 2011-11-18 02:20:04 +0000 | [diff] [blame] | 338 | int hlen, tlen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 340 | if (length > rt->dst.dev->mtu) { |
David S. Miller | 77968b7 | 2011-05-08 17:12:19 -0700 | [diff] [blame] | 341 | ip_local_error(sk, EMSGSIZE, fl4->daddr, inet->inet_dport, |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 342 | rt->dst.dev->mtu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | return -EMSGSIZE; |
| 344 | } |
| 345 | if (flags&MSG_PROBE) |
| 346 | goto out; |
| 347 | |
Herbert Xu | 6608824 | 2011-11-18 02:20:04 +0000 | [diff] [blame] | 348 | hlen = LL_RESERVED_SPACE(rt->dst.dev); |
| 349 | tlen = rt->dst.dev->needed_tailroom; |
Johannes Berg | f5184d2 | 2008-05-12 20:48:31 -0700 | [diff] [blame] | 350 | skb = sock_alloc_send_skb(sk, |
Herbert Xu | 6608824 | 2011-11-18 02:20:04 +0000 | [diff] [blame] | 351 | length + hlen + tlen + 15, |
Johannes Berg | f5184d2 | 2008-05-12 20:48:31 -0700 | [diff] [blame] | 352 | flags & MSG_DONTWAIT, &err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | if (skb == NULL) |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 354 | goto error; |
Herbert Xu | 6608824 | 2011-11-18 02:20:04 +0000 | [diff] [blame] | 355 | skb_reserve(skb, hlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | |
| 357 | skb->priority = sk->sk_priority; |
Laszlo Attila Toth | 4a19ec5 | 2008-01-30 19:08:16 -0800 | [diff] [blame] | 358 | skb->mark = sk->sk_mark; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 359 | skb_dst_set(skb, &rt->dst); |
Eric Dumazet | 1789a64 | 2010-06-03 22:23:57 +0000 | [diff] [blame] | 360 | *rtp = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | |
Arnaldo Carvalho de Melo | 7e28ecc | 2007-03-10 18:40:59 -0300 | [diff] [blame] | 362 | skb_reset_network_header(skb); |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 363 | iph = ip_hdr(skb); |
Arnaldo Carvalho de Melo | 7e28ecc | 2007-03-10 18:40:59 -0300 | [diff] [blame] | 364 | skb_put(skb, length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | |
| 366 | skb->ip_summed = CHECKSUM_NONE; |
| 367 | |
Arnaldo Carvalho de Melo | b0e380b | 2007-04-10 21:21:55 -0700 | [diff] [blame] | 368 | skb->transport_header = skb->network_header; |
Neil Horman | 55888df | 2009-10-28 08:59:47 +0000 | [diff] [blame] | 369 | err = -EFAULT; |
| 370 | if (memcpy_fromiovecend((void *)iph, from, 0, length)) |
| 371 | goto error_free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | |
Herbert Xu | f844c74 | 2008-01-05 23:14:44 -0800 | [diff] [blame] | 373 | iphlen = iph->ihl * 4; |
Neil Horman | 55888df | 2009-10-28 08:59:47 +0000 | [diff] [blame] | 374 | |
| 375 | /* |
| 376 | * We don't want to modify the ip header, but we do need to |
| 377 | * be sure that it won't cause problems later along the network |
| 378 | * stack. Specifically we want to make sure that iph->ihl is a |
| 379 | * sane value. If ihl points beyond the length of the buffer passed |
| 380 | * in, reject the frame as invalid |
| 381 | */ |
| 382 | err = -EINVAL; |
| 383 | if (iphlen > length) |
| 384 | goto error_free; |
| 385 | |
| 386 | if (iphlen >= sizeof(*iph)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | if (!iph->saddr) |
David S. Miller | 77968b7 | 2011-05-08 17:12:19 -0700 | [diff] [blame] | 388 | iph->saddr = fl4->saddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | iph->check = 0; |
| 390 | iph->tot_len = htons(length); |
| 391 | if (!iph->id) |
Ansis Atteka | 703133d | 2013-09-18 15:29:53 -0700 | [diff] [blame] | 392 | ip_select_ident(skb, &rt->dst, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | |
| 394 | iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl); |
| 395 | } |
David L Stevens | 96793b4 | 2007-09-17 09:57:33 -0700 | [diff] [blame] | 396 | if (iph->protocol == IPPROTO_ICMP) |
Pavel Emelyanov | 0388b00 | 2008-07-14 23:00:43 -0700 | [diff] [blame] | 397 | icmp_out_count(net, ((struct icmphdr *) |
David L Stevens | 96793b4 | 2007-09-17 09:57:33 -0700 | [diff] [blame] | 398 | skb_transport_header(skb))->type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | |
Jan Engelhardt | 9bbc768 | 2010-03-23 04:07:29 +0100 | [diff] [blame] | 400 | err = NF_HOOK(NFPROTO_IPV4, NF_INET_LOCAL_OUT, skb, NULL, |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 401 | rt->dst.dev, dst_output); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | if (err > 0) |
Eric Dumazet | 6ce9e7b | 2009-09-02 18:05:33 -0700 | [diff] [blame] | 403 | err = net_xmit_errno(err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | if (err) |
| 405 | goto error; |
| 406 | out: |
| 407 | return 0; |
| 408 | |
Neil Horman | 55888df | 2009-10-28 08:59:47 +0000 | [diff] [blame] | 409 | error_free: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | kfree_skb(skb); |
| 411 | error: |
Pavel Emelyanov | 5e38e27 | 2008-07-16 20:19:49 -0700 | [diff] [blame] | 412 | IP_INC_STATS(net, IPSTATS_MIB_OUTDISCARDS); |
Eric Dumazet | 6ce9e7b | 2009-09-02 18:05:33 -0700 | [diff] [blame] | 413 | if (err == -ENOBUFS && !inet->recverr) |
| 414 | err = 0; |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 415 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | } |
| 417 | |
David S. Miller | 9d6ec93 | 2011-03-12 01:12:47 -0500 | [diff] [blame] | 418 | static int raw_probe_proto_opt(struct flowi4 *fl4, struct msghdr *msg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | { |
| 420 | struct iovec *iov; |
| 421 | u8 __user *type = NULL; |
| 422 | u8 __user *code = NULL; |
| 423 | int probed = 0; |
Jesper Juhl | 93765d8 | 2005-06-18 23:00:15 -0700 | [diff] [blame] | 424 | unsigned int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | |
| 426 | if (!msg->msg_iov) |
Heiko Carstens | a27b58f | 2006-10-30 15:06:12 -0800 | [diff] [blame] | 427 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | |
| 429 | for (i = 0; i < msg->msg_iovlen; i++) { |
| 430 | iov = &msg->msg_iov[i]; |
| 431 | if (!iov) |
| 432 | continue; |
| 433 | |
David S. Miller | 9d6ec93 | 2011-03-12 01:12:47 -0500 | [diff] [blame] | 434 | switch (fl4->flowi4_proto) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | case IPPROTO_ICMP: |
| 436 | /* check if one-byte field is readable or not. */ |
| 437 | if (iov->iov_base && iov->iov_len < 1) |
| 438 | break; |
| 439 | |
| 440 | if (!type) { |
| 441 | type = iov->iov_base; |
| 442 | /* check if code field is readable or not. */ |
| 443 | if (iov->iov_len > 1) |
| 444 | code = type + 1; |
| 445 | } else if (!code) |
| 446 | code = iov->iov_base; |
| 447 | |
| 448 | if (type && code) { |
David S. Miller | 9cce96d | 2011-03-12 03:00:33 -0500 | [diff] [blame] | 449 | if (get_user(fl4->fl4_icmp_type, type) || |
| 450 | get_user(fl4->fl4_icmp_code, code)) |
Heiko Carstens | a27b58f | 2006-10-30 15:06:12 -0800 | [diff] [blame] | 451 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | probed = 1; |
| 453 | } |
| 454 | break; |
| 455 | default: |
| 456 | probed = 1; |
| 457 | break; |
| 458 | } |
| 459 | if (probed) |
| 460 | break; |
| 461 | } |
Heiko Carstens | a27b58f | 2006-10-30 15:06:12 -0800 | [diff] [blame] | 462 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | } |
| 464 | |
| 465 | static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, |
| 466 | size_t len) |
| 467 | { |
| 468 | struct inet_sock *inet = inet_sk(sk); |
| 469 | struct ipcm_cookie ipc; |
| 470 | struct rtable *rt = NULL; |
David S. Miller | 77968b7 | 2011-05-08 17:12:19 -0700 | [diff] [blame] | 471 | struct flowi4 fl4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | int free = 0; |
Al Viro | 3ca3c68 | 2006-09-27 18:28:07 -0700 | [diff] [blame] | 473 | __be32 daddr; |
Al Viro | c1d18f9 | 2006-09-27 18:28:28 -0700 | [diff] [blame] | 474 | __be32 saddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | u8 tos; |
| 476 | int err; |
Eric Dumazet | f6d8bd0 | 2011-04-21 09:45:37 +0000 | [diff] [blame] | 477 | struct ip_options_data opt_copy; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | |
| 479 | err = -EMSGSIZE; |
Jesper Juhl | 926d4b8 | 2005-06-18 23:00:00 -0700 | [diff] [blame] | 480 | if (len > 0xFFFF) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | goto out; |
| 482 | |
| 483 | /* |
| 484 | * Check the flags. |
| 485 | */ |
| 486 | |
| 487 | err = -EOPNOTSUPP; |
| 488 | if (msg->msg_flags & MSG_OOB) /* Mirror BSD error message */ |
| 489 | goto out; /* compatibility */ |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 490 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | /* |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 492 | * Get and verify the address. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | */ |
| 494 | |
| 495 | if (msg->msg_namelen) { |
Jianjun Kong | 5a5f3a8 | 2008-11-03 00:24:34 -0800 | [diff] [blame] | 496 | struct sockaddr_in *usin = (struct sockaddr_in *)msg->msg_name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | err = -EINVAL; |
| 498 | if (msg->msg_namelen < sizeof(*usin)) |
| 499 | goto out; |
| 500 | if (usin->sin_family != AF_INET) { |
Joe Perches | 058bd4d | 2012-03-11 18:36:11 +0000 | [diff] [blame] | 501 | pr_info_once("%s: %s forgot to set AF_INET. Fix it!\n", |
| 502 | __func__, current->comm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | err = -EAFNOSUPPORT; |
| 504 | if (usin->sin_family) |
| 505 | goto out; |
| 506 | } |
| 507 | daddr = usin->sin_addr.s_addr; |
| 508 | /* ANK: I did not forget to get protocol from port field. |
| 509 | * I just do not know, who uses this weirdness. |
| 510 | * IP_HDRINCL is much more convenient. |
| 511 | */ |
| 512 | } else { |
| 513 | err = -EDESTADDRREQ; |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 514 | if (sk->sk_state != TCP_ESTABLISHED) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | goto out; |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 516 | daddr = inet->inet_daddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | } |
| 518 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 519 | ipc.addr = inet->inet_saddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | ipc.opt = NULL; |
Oliver Hartkopp | 2244d07 | 2010-08-17 08:59:14 +0000 | [diff] [blame] | 521 | ipc.tx_flags = 0; |
Francesco Fusco | aa66158 | 2013-09-24 15:43:09 +0200 | [diff] [blame] | 522 | ipc.ttl = 0; |
| 523 | ipc.tos = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | ipc.oif = sk->sk_bound_dev_if; |
| 525 | |
| 526 | if (msg->msg_controllen) { |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 527 | err = ip_cmsg_send(sock_net(sk), msg, &ipc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | if (err) |
| 529 | goto out; |
| 530 | if (ipc.opt) |
| 531 | free = 1; |
| 532 | } |
| 533 | |
| 534 | saddr = ipc.addr; |
| 535 | ipc.addr = daddr; |
| 536 | |
Eric Dumazet | f6d8bd0 | 2011-04-21 09:45:37 +0000 | [diff] [blame] | 537 | if (!ipc.opt) { |
| 538 | struct ip_options_rcu *inet_opt; |
| 539 | |
| 540 | rcu_read_lock(); |
| 541 | inet_opt = rcu_dereference(inet->inet_opt); |
| 542 | if (inet_opt) { |
| 543 | memcpy(&opt_copy, inet_opt, |
| 544 | sizeof(*inet_opt) + inet_opt->opt.optlen); |
| 545 | ipc.opt = &opt_copy.opt; |
| 546 | } |
| 547 | rcu_read_unlock(); |
| 548 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | |
| 550 | if (ipc.opt) { |
| 551 | err = -EINVAL; |
| 552 | /* Linux does not mangle headers on raw sockets, |
| 553 | * so that IP options + IP_HDRINCL is non-sense. |
| 554 | */ |
| 555 | if (inet->hdrincl) |
| 556 | goto done; |
Eric Dumazet | f6d8bd0 | 2011-04-21 09:45:37 +0000 | [diff] [blame] | 557 | if (ipc.opt->opt.srr) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | if (!daddr) |
| 559 | goto done; |
Eric Dumazet | f6d8bd0 | 2011-04-21 09:45:37 +0000 | [diff] [blame] | 560 | daddr = ipc.opt->opt.faddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | } |
| 562 | } |
Francesco Fusco | aa66158 | 2013-09-24 15:43:09 +0200 | [diff] [blame] | 563 | tos = get_rtconn_flags(&ipc, sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | if (msg->msg_flags & MSG_DONTROUTE) |
| 565 | tos |= RTO_ONLINK; |
| 566 | |
Joe Perches | f97c1e0 | 2007-12-16 13:45:43 -0800 | [diff] [blame] | 567 | if (ipv4_is_multicast(daddr)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | if (!ipc.oif) |
| 569 | ipc.oif = inet->mc_index; |
| 570 | if (!saddr) |
| 571 | saddr = inet->mc_addr; |
Erich E. Hoover | 76e2105 | 2012-02-08 09:11:07 +0000 | [diff] [blame] | 572 | } else if (!ipc.oif) |
| 573 | ipc.oif = inet->uc_index; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | |
David S. Miller | 77968b7 | 2011-05-08 17:12:19 -0700 | [diff] [blame] | 575 | flowi4_init_output(&fl4, ipc.oif, sk->sk_mark, tos, |
| 576 | RT_SCOPE_UNIVERSE, |
| 577 | inet->hdrincl ? IPPROTO_RAW : sk->sk_protocol, |
Chris Clark | c27c932 | 2013-08-27 12:02:15 -0600 | [diff] [blame] | 578 | inet_sk_flowi_flags(sk) | FLOWI_FLAG_CAN_SLEEP | |
| 579 | (inet->hdrincl ? FLOWI_FLAG_KNOWN_NH : 0), |
Julian Anastasov | 47670b7 | 2011-08-07 09:16:09 +0000 | [diff] [blame] | 580 | daddr, saddr, 0, 0); |
David S. Miller | ef164ae | 2011-03-31 04:53:51 -0700 | [diff] [blame] | 581 | |
David S. Miller | 77968b7 | 2011-05-08 17:12:19 -0700 | [diff] [blame] | 582 | if (!inet->hdrincl) { |
| 583 | err = raw_probe_proto_opt(&fl4, msg); |
| 584 | if (err) |
David S. Miller | b23dd4f | 2011-03-02 14:31:35 -0800 | [diff] [blame] | 585 | goto done; |
David S. Miller | 77968b7 | 2011-05-08 17:12:19 -0700 | [diff] [blame] | 586 | } |
| 587 | |
| 588 | security_sk_classify_flow(sk, flowi4_to_flowi(&fl4)); |
| 589 | rt = ip_route_output_flow(sock_net(sk), &fl4, sk); |
| 590 | if (IS_ERR(rt)) { |
| 591 | err = PTR_ERR(rt); |
| 592 | rt = NULL; |
| 593 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | |
| 596 | err = -EACCES; |
| 597 | if (rt->rt_flags & RTCF_BROADCAST && !sock_flag(sk, SOCK_BROADCAST)) |
| 598 | goto done; |
| 599 | |
| 600 | if (msg->msg_flags & MSG_CONFIRM) |
| 601 | goto do_confirm; |
| 602 | back_from_confirm: |
| 603 | |
| 604 | if (inet->hdrincl) |
David S. Miller | 77968b7 | 2011-05-08 17:12:19 -0700 | [diff] [blame] | 605 | err = raw_send_hdrinc(sk, &fl4, msg->msg_iov, len, |
| 606 | &rt, msg->msg_flags); |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 607 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | else { |
| 609 | if (!ipc.addr) |
David S. Miller | 77968b7 | 2011-05-08 17:12:19 -0700 | [diff] [blame] | 610 | ipc.addr = fl4.daddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | lock_sock(sk); |
David S. Miller | f5fca60 | 2011-05-08 17:24:10 -0700 | [diff] [blame] | 612 | err = ip_append_data(sk, &fl4, ip_generic_getfrag, |
David S. Miller | 77968b7 | 2011-05-08 17:12:19 -0700 | [diff] [blame] | 613 | msg->msg_iov, len, 0, |
| 614 | &ipc, &rt, msg->msg_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | if (err) |
| 616 | ip_flush_pending_frames(sk); |
Eric Dumazet | 6ce9e7b | 2009-09-02 18:05:33 -0700 | [diff] [blame] | 617 | else if (!(msg->msg_flags & MSG_MORE)) { |
David S. Miller | 77968b7 | 2011-05-08 17:12:19 -0700 | [diff] [blame] | 618 | err = ip_push_pending_frames(sk, &fl4); |
Eric Dumazet | 6ce9e7b | 2009-09-02 18:05:33 -0700 | [diff] [blame] | 619 | if (err == -ENOBUFS && !inet->recverr) |
| 620 | err = 0; |
| 621 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | release_sock(sk); |
| 623 | } |
| 624 | done: |
| 625 | if (free) |
| 626 | kfree(ipc.opt); |
| 627 | ip_rt_put(rt); |
| 628 | |
Jesper Juhl | 5418c692 | 2005-06-18 22:59:45 -0700 | [diff] [blame] | 629 | out: |
| 630 | if (err < 0) |
| 631 | return err; |
| 632 | return len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | |
| 634 | do_confirm: |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 635 | dst_confirm(&rt->dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | if (!(msg->msg_flags & MSG_PROBE) || len) |
| 637 | goto back_from_confirm; |
| 638 | err = 0; |
| 639 | goto done; |
| 640 | } |
| 641 | |
| 642 | static void raw_close(struct sock *sk, long timeout) |
| 643 | { |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 644 | /* |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 645 | * Raw sockets may have direct kernel references. Kill them. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | */ |
| 647 | ip_ra_control(sk, 0, NULL); |
| 648 | |
| 649 | sk_common_release(sk); |
| 650 | } |
| 651 | |
Brian Haley | 7d06b2e | 2008-06-14 17:04:49 -0700 | [diff] [blame] | 652 | static void raw_destroy(struct sock *sk) |
Denis V. Lunev | 22dd485 | 2008-06-04 15:16:12 -0700 | [diff] [blame] | 653 | { |
| 654 | lock_sock(sk); |
| 655 | ip_flush_pending_frames(sk); |
| 656 | release_sock(sk); |
Denis V. Lunev | 22dd485 | 2008-06-04 15:16:12 -0700 | [diff] [blame] | 657 | } |
| 658 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 659 | /* This gets rid of all the nasties in af_inet. -DaveM */ |
| 660 | static int raw_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len) |
| 661 | { |
| 662 | struct inet_sock *inet = inet_sk(sk); |
| 663 | struct sockaddr_in *addr = (struct sockaddr_in *) uaddr; |
| 664 | int ret = -EINVAL; |
| 665 | int chk_addr_ret; |
| 666 | |
| 667 | if (sk->sk_state != TCP_CLOSE || addr_len < sizeof(struct sockaddr_in)) |
| 668 | goto out; |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 669 | 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] | 670 | ret = -EADDRNOTAVAIL; |
| 671 | if (addr->sin_addr.s_addr && chk_addr_ret != RTN_LOCAL && |
| 672 | chk_addr_ret != RTN_MULTICAST && chk_addr_ret != RTN_BROADCAST) |
| 673 | goto out; |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 674 | inet->inet_rcv_saddr = inet->inet_saddr = addr->sin_addr.s_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST) |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 676 | inet->inet_saddr = 0; /* Use device */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | sk_dst_reset(sk); |
| 678 | ret = 0; |
| 679 | out: return ret; |
| 680 | } |
| 681 | |
| 682 | /* |
| 683 | * This should be easy, if there is something there |
| 684 | * we return it, otherwise we block. |
| 685 | */ |
| 686 | |
| 687 | static int raw_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, |
| 688 | size_t len, int noblock, int flags, int *addr_len) |
| 689 | { |
| 690 | struct inet_sock *inet = inet_sk(sk); |
| 691 | size_t copied = 0; |
| 692 | int err = -EOPNOTSUPP; |
| 693 | struct sockaddr_in *sin = (struct sockaddr_in *)msg->msg_name; |
| 694 | struct sk_buff *skb; |
| 695 | |
| 696 | if (flags & MSG_OOB) |
| 697 | goto out; |
| 698 | |
| 699 | if (addr_len) |
| 700 | *addr_len = sizeof(*sin); |
| 701 | |
| 702 | if (flags & MSG_ERRQUEUE) { |
| 703 | err = ip_recv_error(sk, msg, len); |
| 704 | goto out; |
| 705 | } |
| 706 | |
| 707 | skb = skb_recv_datagram(sk, flags, noblock, &err); |
| 708 | if (!skb) |
| 709 | goto out; |
| 710 | |
| 711 | copied = skb->len; |
| 712 | if (len < copied) { |
| 713 | msg->msg_flags |= MSG_TRUNC; |
| 714 | copied = len; |
| 715 | } |
| 716 | |
| 717 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
| 718 | if (err) |
| 719 | goto done; |
| 720 | |
Neil Horman | 3b88578 | 2009-10-12 13:26:31 -0700 | [diff] [blame] | 721 | sock_recv_ts_and_drops(msg, sk, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | |
| 723 | /* Copy the address. */ |
| 724 | if (sin) { |
| 725 | sin->sin_family = AF_INET; |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 726 | sin->sin_addr.s_addr = ip_hdr(skb)->saddr; |
Tetsuo Handa | f59fc7f | 2006-07-25 17:05:35 -0700 | [diff] [blame] | 727 | sin->sin_port = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); |
| 729 | } |
| 730 | if (inet->cmsg_flags) |
| 731 | ip_cmsg_recv(msg, skb); |
| 732 | if (flags & MSG_TRUNC) |
| 733 | copied = skb->len; |
| 734 | done: |
| 735 | skb_free_datagram(sk, skb); |
Jesper Juhl | 5418c692 | 2005-06-18 22:59:45 -0700 | [diff] [blame] | 736 | out: |
| 737 | if (err) |
| 738 | return err; |
| 739 | return copied; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | } |
| 741 | |
| 742 | static int raw_init(struct sock *sk) |
| 743 | { |
| 744 | struct raw_sock *rp = raw_sk(sk); |
| 745 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 746 | if (inet_sk(sk)->inet_num == IPPROTO_ICMP) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | memset(&rp->filter, 0, sizeof(rp->filter)); |
| 748 | return 0; |
| 749 | } |
| 750 | |
| 751 | static int raw_seticmpfilter(struct sock *sk, char __user *optval, int optlen) |
| 752 | { |
| 753 | if (optlen > sizeof(struct icmp_filter)) |
| 754 | optlen = sizeof(struct icmp_filter); |
| 755 | if (copy_from_user(&raw_sk(sk)->filter, optval, optlen)) |
| 756 | return -EFAULT; |
| 757 | return 0; |
| 758 | } |
| 759 | |
| 760 | static int raw_geticmpfilter(struct sock *sk, char __user *optval, int __user *optlen) |
| 761 | { |
| 762 | int len, ret = -EFAULT; |
| 763 | |
| 764 | if (get_user(len, optlen)) |
| 765 | goto out; |
| 766 | ret = -EINVAL; |
| 767 | if (len < 0) |
| 768 | goto out; |
| 769 | if (len > sizeof(struct icmp_filter)) |
| 770 | len = sizeof(struct icmp_filter); |
| 771 | ret = -EFAULT; |
| 772 | if (put_user(len, optlen) || |
| 773 | copy_to_user(optval, &raw_sk(sk)->filter, len)) |
| 774 | goto out; |
| 775 | ret = 0; |
| 776 | out: return ret; |
| 777 | } |
| 778 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 779 | static int do_raw_setsockopt(struct sock *sk, int level, int optname, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 780 | char __user *optval, unsigned int optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | if (optname == ICMP_FILTER) { |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 783 | if (inet_sk(sk)->inet_num != IPPROTO_ICMP) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | return -EOPNOTSUPP; |
| 785 | else |
| 786 | return raw_seticmpfilter(sk, optval, optlen); |
| 787 | } |
| 788 | return -ENOPROTOOPT; |
| 789 | } |
| 790 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 791 | static int raw_setsockopt(struct sock *sk, int level, int optname, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 792 | char __user *optval, unsigned int optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | { |
| 794 | if (level != SOL_RAW) |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 795 | return ip_setsockopt(sk, level, optname, optval, optlen); |
| 796 | return do_raw_setsockopt(sk, level, optname, optval, optlen); |
| 797 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 799 | #ifdef CONFIG_COMPAT |
| 800 | static int compat_raw_setsockopt(struct sock *sk, int level, int optname, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 801 | char __user *optval, unsigned int optlen) |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 802 | { |
| 803 | if (level != SOL_RAW) |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 804 | return compat_ip_setsockopt(sk, level, optname, optval, optlen); |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 805 | return do_raw_setsockopt(sk, level, optname, optval, optlen); |
| 806 | } |
| 807 | #endif |
| 808 | |
| 809 | static int do_raw_getsockopt(struct sock *sk, int level, int optname, |
| 810 | char __user *optval, int __user *optlen) |
| 811 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 812 | if (optname == ICMP_FILTER) { |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 813 | if (inet_sk(sk)->inet_num != IPPROTO_ICMP) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | return -EOPNOTSUPP; |
| 815 | else |
| 816 | return raw_geticmpfilter(sk, optval, optlen); |
| 817 | } |
| 818 | return -ENOPROTOOPT; |
| 819 | } |
| 820 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 821 | static int raw_getsockopt(struct sock *sk, int level, int optname, |
| 822 | char __user *optval, int __user *optlen) |
| 823 | { |
| 824 | if (level != SOL_RAW) |
| 825 | return ip_getsockopt(sk, level, optname, optval, optlen); |
| 826 | return do_raw_getsockopt(sk, level, optname, optval, optlen); |
| 827 | } |
| 828 | |
| 829 | #ifdef CONFIG_COMPAT |
| 830 | 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] | 831 | char __user *optval, int __user *optlen) |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 832 | { |
| 833 | if (level != SOL_RAW) |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 834 | return compat_ip_getsockopt(sk, level, optname, optval, optlen); |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 835 | return do_raw_getsockopt(sk, level, optname, optval, optlen); |
| 836 | } |
| 837 | #endif |
| 838 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 839 | static int raw_ioctl(struct sock *sk, int cmd, unsigned long arg) |
| 840 | { |
| 841 | switch (cmd) { |
Joe Perches | 4500ebf | 2011-07-01 09:43:07 +0000 | [diff] [blame] | 842 | case SIOCOUTQ: { |
| 843 | int amount = sk_wmem_alloc_get(sk); |
Eric Dumazet | 31e6d36 | 2009-06-17 19:05:41 -0700 | [diff] [blame] | 844 | |
Joe Perches | 4500ebf | 2011-07-01 09:43:07 +0000 | [diff] [blame] | 845 | return put_user(amount, (int __user *)arg); |
| 846 | } |
| 847 | case SIOCINQ: { |
| 848 | struct sk_buff *skb; |
| 849 | int amount = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 850 | |
Joe Perches | 4500ebf | 2011-07-01 09:43:07 +0000 | [diff] [blame] | 851 | spin_lock_bh(&sk->sk_receive_queue.lock); |
| 852 | skb = skb_peek(&sk->sk_receive_queue); |
| 853 | if (skb != NULL) |
| 854 | amount = skb->len; |
| 855 | spin_unlock_bh(&sk->sk_receive_queue.lock); |
| 856 | return put_user(amount, (int __user *)arg); |
| 857 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | |
Joe Perches | 4500ebf | 2011-07-01 09:43:07 +0000 | [diff] [blame] | 859 | default: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 860 | #ifdef CONFIG_IP_MROUTE |
Joe Perches | 4500ebf | 2011-07-01 09:43:07 +0000 | [diff] [blame] | 861 | return ipmr_ioctl(sk, cmd, (void __user *)arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 862 | #else |
Joe Perches | 4500ebf | 2011-07-01 09:43:07 +0000 | [diff] [blame] | 863 | return -ENOIOCTLCMD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | #endif |
| 865 | } |
| 866 | } |
| 867 | |
Eric W. Biederman | 709b46e | 2011-01-29 16:15:56 +0000 | [diff] [blame] | 868 | #ifdef CONFIG_COMPAT |
| 869 | static int compat_raw_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg) |
| 870 | { |
| 871 | switch (cmd) { |
| 872 | case SIOCOUTQ: |
| 873 | case SIOCINQ: |
| 874 | return -ENOIOCTLCMD; |
| 875 | default: |
| 876 | #ifdef CONFIG_IP_MROUTE |
| 877 | return ipmr_compat_ioctl(sk, cmd, compat_ptr(arg)); |
| 878 | #else |
| 879 | return -ENOIOCTLCMD; |
| 880 | #endif |
| 881 | } |
| 882 | } |
| 883 | #endif |
| 884 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 885 | struct proto raw_prot = { |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 886 | .name = "RAW", |
| 887 | .owner = THIS_MODULE, |
| 888 | .close = raw_close, |
Denis V. Lunev | 22dd485 | 2008-06-04 15:16:12 -0700 | [diff] [blame] | 889 | .destroy = raw_destroy, |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 890 | .connect = ip4_datagram_connect, |
| 891 | .disconnect = udp_disconnect, |
| 892 | .ioctl = raw_ioctl, |
| 893 | .init = raw_init, |
| 894 | .setsockopt = raw_setsockopt, |
| 895 | .getsockopt = raw_getsockopt, |
| 896 | .sendmsg = raw_sendmsg, |
| 897 | .recvmsg = raw_recvmsg, |
| 898 | .bind = raw_bind, |
| 899 | .backlog_rcv = raw_rcv_skb, |
Steffen Klassert | 8141ed9 | 2013-01-21 02:00:03 +0000 | [diff] [blame] | 900 | .release_cb = ip4_datagram_release_cb, |
Pavel Emelyanov | fc8717b | 2008-03-22 16:56:51 -0700 | [diff] [blame] | 901 | .hash = raw_hash_sk, |
| 902 | .unhash = raw_unhash_sk, |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 903 | .obj_size = sizeof(struct raw_sock), |
Pavel Emelyanov | fc8717b | 2008-03-22 16:56:51 -0700 | [diff] [blame] | 904 | .h.raw_hash = &raw_v4_hashinfo, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 905 | #ifdef CONFIG_COMPAT |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 906 | .compat_setsockopt = compat_raw_setsockopt, |
| 907 | .compat_getsockopt = compat_raw_getsockopt, |
Eric W. Biederman | 709b46e | 2011-01-29 16:15:56 +0000 | [diff] [blame] | 908 | .compat_ioctl = compat_raw_ioctl, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 909 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | }; |
| 911 | |
| 912 | #ifdef CONFIG_PROC_FS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 913 | static struct sock *raw_get_first(struct seq_file *seq) |
| 914 | { |
| 915 | struct sock *sk; |
Jianjun Kong | 5a5f3a8 | 2008-11-03 00:24:34 -0800 | [diff] [blame] | 916 | struct raw_iter_state *state = raw_seq_private(seq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | |
Pavel Emelyanov | b673e4d | 2007-11-19 22:36:45 -0800 | [diff] [blame] | 918 | for (state->bucket = 0; state->bucket < RAW_HTABLE_SIZE; |
| 919 | ++state->bucket) { |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 920 | sk_for_each(sk, &state->h->ht[state->bucket]) |
YOSHIFUJI Hideaki | 1218854 | 2008-03-26 02:36:06 +0900 | [diff] [blame] | 921 | if (sock_net(sk) == seq_file_net(seq)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 922 | goto found; |
| 923 | } |
| 924 | sk = NULL; |
| 925 | found: |
| 926 | return sk; |
| 927 | } |
| 928 | |
| 929 | static struct sock *raw_get_next(struct seq_file *seq, struct sock *sk) |
| 930 | { |
Jianjun Kong | 5a5f3a8 | 2008-11-03 00:24:34 -0800 | [diff] [blame] | 931 | struct raw_iter_state *state = raw_seq_private(seq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | |
| 933 | do { |
| 934 | sk = sk_next(sk); |
| 935 | try_again: |
| 936 | ; |
YOSHIFUJI Hideaki | 1218854 | 2008-03-26 02:36:06 +0900 | [diff] [blame] | 937 | } while (sk && sock_net(sk) != seq_file_net(seq)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | |
Pavel Emelyanov | b673e4d | 2007-11-19 22:36:45 -0800 | [diff] [blame] | 939 | if (!sk && ++state->bucket < RAW_HTABLE_SIZE) { |
Pavel Emelyanov | 42a7380 | 2007-11-19 22:38:33 -0800 | [diff] [blame] | 940 | sk = sk_head(&state->h->ht[state->bucket]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | goto try_again; |
| 942 | } |
| 943 | return sk; |
| 944 | } |
| 945 | |
| 946 | static struct sock *raw_get_idx(struct seq_file *seq, loff_t pos) |
| 947 | { |
| 948 | struct sock *sk = raw_get_first(seq); |
| 949 | |
| 950 | if (sk) |
| 951 | while (pos && (sk = raw_get_next(seq, sk)) != NULL) |
| 952 | --pos; |
| 953 | return pos ? NULL : sk; |
| 954 | } |
| 955 | |
Pavel Emelyanov | 42a7380 | 2007-11-19 22:38:33 -0800 | [diff] [blame] | 956 | void *raw_seq_start(struct seq_file *seq, loff_t *pos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 957 | { |
Pavel Emelyanov | 42a7380 | 2007-11-19 22:38:33 -0800 | [diff] [blame] | 958 | struct raw_iter_state *state = raw_seq_private(seq); |
| 959 | |
| 960 | read_lock(&state->h->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | return *pos ? raw_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; |
| 962 | } |
Pavel Emelyanov | 42a7380 | 2007-11-19 22:38:33 -0800 | [diff] [blame] | 963 | EXPORT_SYMBOL_GPL(raw_seq_start); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 964 | |
Pavel Emelyanov | 42a7380 | 2007-11-19 22:38:33 -0800 | [diff] [blame] | 965 | 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] | 966 | { |
| 967 | struct sock *sk; |
| 968 | |
| 969 | if (v == SEQ_START_TOKEN) |
| 970 | sk = raw_get_first(seq); |
| 971 | else |
| 972 | sk = raw_get_next(seq, v); |
| 973 | ++*pos; |
| 974 | return sk; |
| 975 | } |
Pavel Emelyanov | 42a7380 | 2007-11-19 22:38:33 -0800 | [diff] [blame] | 976 | EXPORT_SYMBOL_GPL(raw_seq_next); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 977 | |
Pavel Emelyanov | 42a7380 | 2007-11-19 22:38:33 -0800 | [diff] [blame] | 978 | void raw_seq_stop(struct seq_file *seq, void *v) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 979 | { |
Pavel Emelyanov | 42a7380 | 2007-11-19 22:38:33 -0800 | [diff] [blame] | 980 | struct raw_iter_state *state = raw_seq_private(seq); |
| 981 | |
| 982 | read_unlock(&state->h->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | } |
Pavel Emelyanov | 42a7380 | 2007-11-19 22:38:33 -0800 | [diff] [blame] | 984 | EXPORT_SYMBOL_GPL(raw_seq_stop); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 985 | |
Denis V. Lunev | 8cd850e | 2008-01-31 03:46:43 -0800 | [diff] [blame] | 986 | 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] | 987 | { |
| 988 | struct inet_sock *inet = inet_sk(sp); |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 989 | __be32 dest = inet->inet_daddr, |
| 990 | src = inet->inet_rcv_saddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | __u16 destp = 0, |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 992 | srcp = inet->inet_num; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 993 | |
Denis V. Lunev | 8cd850e | 2008-01-31 03:46:43 -0800 | [diff] [blame] | 994 | seq_printf(seq, "%4d: %08X:%04X %08X:%04X" |
Francesco Fusco | d14c5ab | 2013-08-15 13:42:14 +0200 | [diff] [blame] | 995 | " %02X %08X:%08X %02X:%08lX %08X %5u %8d %lu %d %pK %d\n", |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 996 | i, src, srcp, dest, destp, sp->sk_state, |
Eric Dumazet | 31e6d36 | 2009-06-17 19:05:41 -0700 | [diff] [blame] | 997 | sk_wmem_alloc_get(sp), |
| 998 | sk_rmem_alloc_get(sp), |
Eric W. Biederman | a7cb5a4 | 2012-05-24 01:10:10 -0600 | [diff] [blame] | 999 | 0, 0L, 0, |
| 1000 | from_kuid_munged(seq_user_ns(seq), sock_i_uid(sp)), |
| 1001 | 0, sock_i_ino(sp), |
Wang Chen | 33c732c | 2007-11-13 20:30:01 -0800 | [diff] [blame] | 1002 | atomic_read(&sp->sk_refcnt), sp, atomic_read(&sp->sk_drops)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1003 | } |
| 1004 | |
| 1005 | static int raw_seq_show(struct seq_file *seq, void *v) |
| 1006 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | if (v == SEQ_START_TOKEN) |
Denis V. Lunev | 8cd850e | 2008-01-31 03:46:43 -0800 | [diff] [blame] | 1008 | seq_printf(seq, " sl local_address rem_address st tx_queue " |
| 1009 | "rx_queue tr tm->when retrnsmt uid timeout " |
Eric Dumazet | cb61cb9 | 2008-06-17 21:04:56 -0700 | [diff] [blame] | 1010 | "inode ref pointer drops\n"); |
Denis V. Lunev | 8cd850e | 2008-01-31 03:46:43 -0800 | [diff] [blame] | 1011 | else |
| 1012 | raw_sock_seq_show(seq, v, raw_seq_private(seq)->bucket); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | return 0; |
| 1014 | } |
| 1015 | |
Stephen Hemminger | f690808 | 2007-03-12 14:34:29 -0700 | [diff] [blame] | 1016 | static const struct seq_operations raw_seq_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1017 | .start = raw_seq_start, |
| 1018 | .next = raw_seq_next, |
| 1019 | .stop = raw_seq_stop, |
| 1020 | .show = raw_seq_show, |
| 1021 | }; |
| 1022 | |
Denis V. Lunev | 3046d76 | 2008-01-31 03:48:55 -0800 | [diff] [blame] | 1023 | int raw_seq_open(struct inode *ino, struct file *file, |
| 1024 | struct raw_hashinfo *h, const struct seq_operations *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1025 | { |
Pavel Emelyanov | f51d599 | 2008-01-14 05:35:57 -0800 | [diff] [blame] | 1026 | int err; |
Pavel Emelyanov | 42a7380 | 2007-11-19 22:38:33 -0800 | [diff] [blame] | 1027 | struct raw_iter_state *i; |
| 1028 | |
Denis V. Lunev | 3046d76 | 2008-01-31 03:48:55 -0800 | [diff] [blame] | 1029 | err = seq_open_net(ino, file, ops, sizeof(struct raw_iter_state)); |
Pavel Emelyanov | f51d599 | 2008-01-14 05:35:57 -0800 | [diff] [blame] | 1030 | if (err < 0) |
| 1031 | return err; |
Pavel Emelyanov | 42a7380 | 2007-11-19 22:38:33 -0800 | [diff] [blame] | 1032 | |
Pavel Emelyanov | f51d599 | 2008-01-14 05:35:57 -0800 | [diff] [blame] | 1033 | i = raw_seq_private((struct seq_file *)file->private_data); |
Pavel Emelyanov | 42a7380 | 2007-11-19 22:38:33 -0800 | [diff] [blame] | 1034 | i->h = h; |
Pavel Emelyanov | 42a7380 | 2007-11-19 22:38:33 -0800 | [diff] [blame] | 1035 | return 0; |
| 1036 | } |
| 1037 | EXPORT_SYMBOL_GPL(raw_seq_open); |
| 1038 | |
| 1039 | static int raw_v4_seq_open(struct inode *inode, struct file *file) |
| 1040 | { |
Denis V. Lunev | 3046d76 | 2008-01-31 03:48:55 -0800 | [diff] [blame] | 1041 | return raw_seq_open(inode, file, &raw_v4_hashinfo, &raw_seq_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1042 | } |
| 1043 | |
Arjan van de Ven | 9a32144 | 2007-02-12 00:55:35 -0800 | [diff] [blame] | 1044 | static const struct file_operations raw_seq_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1045 | .owner = THIS_MODULE, |
Pavel Emelyanov | 42a7380 | 2007-11-19 22:38:33 -0800 | [diff] [blame] | 1046 | .open = raw_v4_seq_open, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | .read = seq_read, |
| 1048 | .llseek = seq_lseek, |
Pavel Emelyanov | f51d599 | 2008-01-14 05:35:57 -0800 | [diff] [blame] | 1049 | .release = seq_release_net, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1050 | }; |
| 1051 | |
Pavel Emelyanov | a308da1 | 2008-01-14 05:36:50 -0800 | [diff] [blame] | 1052 | static __net_init int raw_init_net(struct net *net) |
| 1053 | { |
Gao feng | d4beaa6 | 2013-02-18 01:34:54 +0000 | [diff] [blame] | 1054 | if (!proc_create("raw", S_IRUGO, net->proc_net, &raw_seq_fops)) |
Pavel Emelyanov | a308da1 | 2008-01-14 05:36:50 -0800 | [diff] [blame] | 1055 | return -ENOMEM; |
| 1056 | |
| 1057 | return 0; |
| 1058 | } |
| 1059 | |
| 1060 | static __net_exit void raw_exit_net(struct net *net) |
| 1061 | { |
Gao feng | ece31ff | 2013-02-18 01:34:56 +0000 | [diff] [blame] | 1062 | remove_proc_entry("raw", net->proc_net); |
Pavel Emelyanov | a308da1 | 2008-01-14 05:36:50 -0800 | [diff] [blame] | 1063 | } |
| 1064 | |
| 1065 | static __net_initdata struct pernet_operations raw_net_ops = { |
| 1066 | .init = raw_init_net, |
| 1067 | .exit = raw_exit_net, |
| 1068 | }; |
| 1069 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1070 | int __init raw_proc_init(void) |
| 1071 | { |
Pavel Emelyanov | a308da1 | 2008-01-14 05:36:50 -0800 | [diff] [blame] | 1072 | return register_pernet_subsys(&raw_net_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1073 | } |
| 1074 | |
| 1075 | void __init raw_proc_exit(void) |
| 1076 | { |
Pavel Emelyanov | a308da1 | 2008-01-14 05:36:50 -0800 | [diff] [blame] | 1077 | unregister_pernet_subsys(&raw_net_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1078 | } |
| 1079 | #endif /* CONFIG_PROC_FS */ |