Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 2 | * inet_diag.c Module for monitoring INET transport protocols sockets. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version |
| 9 | * 2 of the License, or (at your option) any later version. |
| 10 | */ |
| 11 | |
Ilpo Järvinen | 172589c | 2007-08-28 15:50:33 -0700 | [diff] [blame] | 12 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #include <linux/module.h> |
| 14 | #include <linux/types.h> |
| 15 | #include <linux/fcntl.h> |
| 16 | #include <linux/random.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 17 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include <linux/cache.h> |
| 19 | #include <linux/init.h> |
| 20 | #include <linux/time.h> |
| 21 | |
| 22 | #include <net/icmp.h> |
| 23 | #include <net/tcp.h> |
| 24 | #include <net/ipv6.h> |
| 25 | #include <net/inet_common.h> |
Arnaldo Carvalho de Melo | 505cbfc | 2005-08-12 09:19:38 -0300 | [diff] [blame] | 26 | #include <net/inet_connection_sock.h> |
| 27 | #include <net/inet_hashtables.h> |
| 28 | #include <net/inet_timewait_sock.h> |
| 29 | #include <net/inet6_hashtables.h> |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 30 | #include <net/netlink.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | |
| 32 | #include <linux/inet.h> |
| 33 | #include <linux/stddef.h> |
| 34 | |
Arnaldo Carvalho de Melo | a8c2190 | 2005-08-12 12:56:38 -0300 | [diff] [blame] | 35 | #include <linux/inet_diag.h> |
Pavel Emelyanov | d366477 | 2011-12-06 07:58:03 +0000 | [diff] [blame] | 36 | #include <linux/sock_diag.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 38 | static const struct inet_diag_handler **inet_diag_table; |
| 39 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 40 | struct inet_diag_entry { |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 41 | const __be32 *saddr; |
| 42 | const __be32 *daddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | u16 sport; |
| 44 | u16 dport; |
| 45 | u16 family; |
| 46 | u16 userlocks; |
Neal Cardwell | 1c95df8 | 2012-12-08 19:43:21 +0000 | [diff] [blame] | 47 | #if IS_ENABLED(CONFIG_IPV6) |
| 48 | struct in6_addr saddr_storage; /* for IPv4-mapped-IPv6 addresses */ |
| 49 | struct in6_addr daddr_storage; /* for IPv4-mapped-IPv6 addresses */ |
| 50 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | }; |
| 52 | |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 53 | static DEFINE_MUTEX(inet_diag_table_mutex); |
| 54 | |
Pavel Emelyanov | f13c95f | 2011-12-06 08:05:24 +0000 | [diff] [blame] | 55 | static const struct inet_diag_handler *inet_diag_lock_handler(int proto) |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 56 | { |
Pavel Emelyanov | f13c95f | 2011-12-06 08:05:24 +0000 | [diff] [blame] | 57 | if (!inet_diag_table[proto]) |
Pavel Emelyanov | aec8dc6 | 2011-12-15 02:43:27 +0000 | [diff] [blame] | 58 | request_module("net-pf-%d-proto-%d-type-%d-%d", PF_NETLINK, |
| 59 | NETLINK_SOCK_DIAG, AF_INET, proto); |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 60 | |
| 61 | mutex_lock(&inet_diag_table_mutex); |
Pavel Emelyanov | f13c95f | 2011-12-06 08:05:24 +0000 | [diff] [blame] | 62 | if (!inet_diag_table[proto]) |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 63 | return ERR_PTR(-ENOENT); |
| 64 | |
Pavel Emelyanov | f13c95f | 2011-12-06 08:05:24 +0000 | [diff] [blame] | 65 | return inet_diag_table[proto]; |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 66 | } |
| 67 | |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 68 | static void inet_diag_unlock_handler(const struct inet_diag_handler *handler) |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 69 | { |
| 70 | mutex_unlock(&inet_diag_table_mutex); |
| 71 | } |
| 72 | |
Pavel Emelyanov | 3c4d05c | 2011-12-09 06:23:00 +0000 | [diff] [blame] | 73 | int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk, |
Eric Dumazet | 34160ea | 2015-03-10 07:15:54 -0700 | [diff] [blame] | 74 | struct sk_buff *skb, const struct inet_diag_req_v2 *req, |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 75 | struct user_namespace *user_ns, |
| 76 | u32 portid, u32 seq, u16 nlmsg_flags, |
| 77 | const struct nlmsghdr *unlh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | { |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 79 | const struct inet_sock *inet = inet_sk(sk); |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 80 | const struct inet_diag_handler *handler; |
| 81 | int ext = req->idiag_ext; |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 82 | struct inet_diag_msg *r; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | struct nlmsghdr *nlh; |
Thomas Graf | 6e277ed | 2012-06-26 23:36:12 +0000 | [diff] [blame] | 84 | struct nlattr *attr; |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 85 | void *info = NULL; |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 86 | |
Pavel Emelyanov | a029fe2 | 2011-12-06 07:59:32 +0000 | [diff] [blame] | 87 | handler = inet_diag_table[req->sdiag_protocol]; |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 88 | BUG_ON(!handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 90 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), |
Thomas Graf | 6e277ed | 2012-06-26 23:36:12 +0000 | [diff] [blame] | 91 | nlmsg_flags); |
| 92 | if (!nlh) |
David S. Miller | d106352 | 2012-06-26 21:28:54 -0700 | [diff] [blame] | 93 | return -EMSGSIZE; |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 94 | |
David S. Miller | d106352 | 2012-06-26 21:28:54 -0700 | [diff] [blame] | 95 | r = nlmsg_data(nlh); |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 96 | BUG_ON(sk->sk_state == TCP_TIME_WAIT); |
Arnaldo Carvalho de Melo | 4e852c0 | 2006-01-09 14:56:19 -0800 | [diff] [blame] | 97 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 98 | r->idiag_family = sk->sk_family; |
| 99 | r->idiag_state = sk->sk_state; |
| 100 | r->idiag_timer = 0; |
| 101 | r->idiag_retrans = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 103 | r->id.idiag_if = sk->sk_bound_dev_if; |
Pavel Emelyanov | f65c1b5 | 2011-12-15 02:43:44 +0000 | [diff] [blame] | 104 | sock_diag_save_cookie(sk, r->id.idiag_cookie); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 106 | r->id.idiag_sport = inet->inet_sport; |
| 107 | r->id.idiag_dport = inet->inet_dport; |
Daniel Borkmann | b1aac81 | 2013-12-17 00:38:39 +0100 | [diff] [blame] | 108 | |
| 109 | memset(&r->id.idiag_src, 0, sizeof(r->id.idiag_src)); |
| 110 | memset(&r->id.idiag_dst, 0, sizeof(r->id.idiag_dst)); |
| 111 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 112 | r->id.idiag_src[0] = inet->inet_rcv_saddr; |
| 113 | r->id.idiag_dst[0] = inet->inet_daddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | |
Pavel Emelyanov | e4e541a | 2012-10-23 22:29:56 +0400 | [diff] [blame] | 115 | if (nla_put_u8(skb, INET_DIAG_SHUTDOWN, sk->sk_shutdown)) |
| 116 | goto errout; |
| 117 | |
Maciej Żenczykowski | 717b6d8 | 2011-11-22 16:03:10 -0500 | [diff] [blame] | 118 | /* IPv6 dual-stack sockets use inet->tos for IPv4 connections, |
| 119 | * hence this needs to be included regardless of socket family. |
| 120 | */ |
| 121 | if (ext & (1 << (INET_DIAG_TOS - 1))) |
Thomas Graf | 6e277ed | 2012-06-26 23:36:12 +0000 | [diff] [blame] | 122 | if (nla_put_u8(skb, INET_DIAG_TOS, inet->tos) < 0) |
| 123 | goto errout; |
Maciej Żenczykowski | 717b6d8 | 2011-11-22 16:03:10 -0500 | [diff] [blame] | 124 | |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 125 | #if IS_ENABLED(CONFIG_IPV6) |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 126 | if (r->idiag_family == AF_INET6) { |
Eric Dumazet | efe4208 | 2013-10-03 15:42:29 -0700 | [diff] [blame] | 127 | *(struct in6_addr *)r->id.idiag_src = sk->sk_v6_rcv_saddr; |
| 128 | *(struct in6_addr *)r->id.idiag_dst = sk->sk_v6_daddr; |
Thomas Graf | 6e277ed | 2012-06-26 23:36:12 +0000 | [diff] [blame] | 129 | |
Maciej Żenczykowski | 06236ac | 2011-11-07 14:23:11 +0000 | [diff] [blame] | 130 | if (ext & (1 << (INET_DIAG_TCLASS - 1))) |
Eric Dumazet | efe4208 | 2013-10-03 15:42:29 -0700 | [diff] [blame] | 131 | if (nla_put_u8(skb, INET_DIAG_TCLASS, |
| 132 | inet6_sk(sk)->tclass) < 0) |
Thomas Graf | 6e277ed | 2012-06-26 23:36:12 +0000 | [diff] [blame] | 133 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | } |
| 135 | #endif |
| 136 | |
Eric W. Biederman | d06ca95 | 2012-05-24 17:58:08 -0600 | [diff] [blame] | 137 | r->idiag_uid = from_kuid_munged(user_ns, sock_i_uid(sk)); |
Pavel Emelyanov | 3c4d05c | 2011-12-09 06:23:00 +0000 | [diff] [blame] | 138 | r->idiag_inode = sock_i_ino(sk); |
| 139 | |
Thomas Graf | 6e277ed | 2012-06-26 23:36:12 +0000 | [diff] [blame] | 140 | if (ext & (1 << (INET_DIAG_MEMINFO - 1))) { |
| 141 | struct inet_diag_meminfo minfo = { |
| 142 | .idiag_rmem = sk_rmem_alloc_get(sk), |
| 143 | .idiag_wmem = sk->sk_wmem_queued, |
| 144 | .idiag_fmem = sk->sk_forward_alloc, |
| 145 | .idiag_tmem = sk_wmem_alloc_get(sk), |
| 146 | }; |
| 147 | |
| 148 | if (nla_put(skb, INET_DIAG_MEMINFO, sizeof(minfo), &minfo) < 0) |
| 149 | goto errout; |
Pavel Emelyanov | 3c4d05c | 2011-12-09 06:23:00 +0000 | [diff] [blame] | 150 | } |
| 151 | |
Pavel Emelyanov | c0636fa | 2011-12-30 00:53:32 +0000 | [diff] [blame] | 152 | if (ext & (1 << (INET_DIAG_SKMEMINFO - 1))) |
| 153 | if (sock_diag_put_meminfo(sk, skb, INET_DIAG_SKMEMINFO)) |
Thomas Graf | 6e277ed | 2012-06-26 23:36:12 +0000 | [diff] [blame] | 154 | goto errout; |
Pavel Emelyanov | c0636fa | 2011-12-30 00:53:32 +0000 | [diff] [blame] | 155 | |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 156 | if (!icsk) { |
Shan Wei | 62ad6fc | 2012-04-24 18:15:41 +0000 | [diff] [blame] | 157 | handler->idiag_get_info(sk, r, NULL); |
Pavel Emelyanov | 3c4d05c | 2011-12-09 06:23:00 +0000 | [diff] [blame] | 158 | goto out; |
| 159 | } |
| 160 | |
Ilpo Järvinen | 172589c | 2007-08-28 15:50:33 -0700 | [diff] [blame] | 161 | #define EXPIRES_IN_MS(tmo) DIV_ROUND_UP((tmo - jiffies) * 1000, HZ) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | |
Nandita Dukkipati | 6ba8a3b | 2013-03-11 10:00:43 +0000 | [diff] [blame] | 163 | if (icsk->icsk_pending == ICSK_TIME_RETRANS || |
| 164 | icsk->icsk_pending == ICSK_TIME_EARLY_RETRANS || |
| 165 | icsk->icsk_pending == ICSK_TIME_LOSS_PROBE) { |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 166 | r->idiag_timer = 1; |
| 167 | r->idiag_retrans = icsk->icsk_retransmits; |
| 168 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 169 | } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) { |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 170 | r->idiag_timer = 4; |
| 171 | r->idiag_retrans = icsk->icsk_probes_out; |
| 172 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | } else if (timer_pending(&sk->sk_timer)) { |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 174 | r->idiag_timer = 2; |
| 175 | r->idiag_retrans = icsk->icsk_probes_out; |
| 176 | r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | } else { |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 178 | r->idiag_timer = 0; |
| 179 | r->idiag_expires = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | } |
| 181 | #undef EXPIRES_IN_MS |
Arnaldo Carvalho de Melo | 540722f | 2005-08-10 05:54:28 -0300 | [diff] [blame] | 182 | |
Thomas Graf | 6e277ed | 2012-06-26 23:36:12 +0000 | [diff] [blame] | 183 | if (ext & (1 << (INET_DIAG_INFO - 1))) { |
| 184 | attr = nla_reserve(skb, INET_DIAG_INFO, |
| 185 | sizeof(struct tcp_info)); |
| 186 | if (!attr) |
| 187 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | |
Thomas Graf | 6e277ed | 2012-06-26 23:36:12 +0000 | [diff] [blame] | 189 | info = nla_data(attr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | } |
| 191 | |
Thomas Graf | 6e277ed | 2012-06-26 23:36:12 +0000 | [diff] [blame] | 192 | if ((ext & (1 << (INET_DIAG_CONG - 1))) && icsk->icsk_ca_ops) |
| 193 | if (nla_put_string(skb, INET_DIAG_CONG, |
| 194 | icsk->icsk_ca_ops->name) < 0) |
| 195 | goto errout; |
| 196 | |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 197 | handler->idiag_get_info(sk, r, info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | |
Arnaldo Carvalho de Melo | 6687e98 | 2005-08-10 04:03:31 -0300 | [diff] [blame] | 199 | if (sk->sk_state < TCP_TIME_WAIT && |
| 200 | icsk->icsk_ca_ops && icsk->icsk_ca_ops->get_info) |
| 201 | icsk->icsk_ca_ops->get_info(sk, ext, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | |
Pavel Emelyanov | 3c4d05c | 2011-12-09 06:23:00 +0000 | [diff] [blame] | 203 | out: |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 204 | nlmsg_end(skb, nlh); |
| 205 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | |
Thomas Graf | 6e277ed | 2012-06-26 23:36:12 +0000 | [diff] [blame] | 207 | errout: |
| 208 | nlmsg_cancel(skb, nlh); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 209 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | } |
Pavel Emelyanov | 3c4d05c | 2011-12-09 06:23:00 +0000 | [diff] [blame] | 211 | EXPORT_SYMBOL_GPL(inet_sk_diag_fill); |
| 212 | |
| 213 | static int inet_csk_diag_fill(struct sock *sk, |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 214 | struct sk_buff *skb, |
Eric Dumazet | 34160ea | 2015-03-10 07:15:54 -0700 | [diff] [blame] | 215 | const struct inet_diag_req_v2 *req, |
Eric W. Biederman | d06ca95 | 2012-05-24 17:58:08 -0600 | [diff] [blame] | 216 | struct user_namespace *user_ns, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 217 | u32 portid, u32 seq, u16 nlmsg_flags, |
Pavel Emelyanov | 3c4d05c | 2011-12-09 06:23:00 +0000 | [diff] [blame] | 218 | const struct nlmsghdr *unlh) |
| 219 | { |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 220 | return inet_sk_diag_fill(sk, inet_csk(sk), skb, req, |
| 221 | user_ns, portid, seq, nlmsg_flags, unlh); |
Pavel Emelyanov | 3c4d05c | 2011-12-09 06:23:00 +0000 | [diff] [blame] | 222 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | |
Eric Dumazet | 33cf7c9 | 2015-03-11 18:53:14 -0700 | [diff] [blame] | 224 | static int inet_twsk_diag_fill(struct sock *sk, |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 225 | struct sk_buff *skb, |
Eric Dumazet | 34160ea | 2015-03-10 07:15:54 -0700 | [diff] [blame] | 226 | const struct inet_diag_req_v2 *req, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 227 | u32 portid, u32 seq, u16 nlmsg_flags, |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 228 | const struct nlmsghdr *unlh) |
| 229 | { |
Eric Dumazet | 33cf7c9 | 2015-03-11 18:53:14 -0700 | [diff] [blame] | 230 | struct inet_timewait_sock *tw = inet_twsk(sk); |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 231 | struct inet_diag_msg *r; |
Thomas Graf | 6e277ed | 2012-06-26 23:36:12 +0000 | [diff] [blame] | 232 | struct nlmsghdr *nlh; |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 233 | s32 tmo; |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 234 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 235 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), |
Thomas Graf | 6e277ed | 2012-06-26 23:36:12 +0000 | [diff] [blame] | 236 | nlmsg_flags); |
| 237 | if (!nlh) |
David S. Miller | d106352 | 2012-06-26 21:28:54 -0700 | [diff] [blame] | 238 | return -EMSGSIZE; |
David S. Miller | d106352 | 2012-06-26 21:28:54 -0700 | [diff] [blame] | 239 | |
| 240 | r = nlmsg_data(nlh); |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 241 | BUG_ON(tw->tw_state != TCP_TIME_WAIT); |
| 242 | |
Eric Dumazet | 96f817f | 2013-10-03 14:27:25 -0700 | [diff] [blame] | 243 | tmo = tw->tw_ttd - inet_tw_time_stamp(); |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 244 | if (tmo < 0) |
| 245 | tmo = 0; |
| 246 | |
| 247 | r->idiag_family = tw->tw_family; |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 248 | r->idiag_retrans = 0; |
Daniel Borkmann | b1aac81 | 2013-12-17 00:38:39 +0100 | [diff] [blame] | 249 | |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 250 | r->id.idiag_if = tw->tw_bound_dev_if; |
Eric Dumazet | 33cf7c9 | 2015-03-11 18:53:14 -0700 | [diff] [blame] | 251 | sock_diag_save_cookie(sk, r->id.idiag_cookie); |
Daniel Borkmann | b1aac81 | 2013-12-17 00:38:39 +0100 | [diff] [blame] | 252 | |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 253 | r->id.idiag_sport = tw->tw_sport; |
| 254 | r->id.idiag_dport = tw->tw_dport; |
Daniel Borkmann | b1aac81 | 2013-12-17 00:38:39 +0100 | [diff] [blame] | 255 | |
| 256 | memset(&r->id.idiag_src, 0, sizeof(r->id.idiag_src)); |
| 257 | memset(&r->id.idiag_dst, 0, sizeof(r->id.idiag_dst)); |
| 258 | |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 259 | r->id.idiag_src[0] = tw->tw_rcv_saddr; |
| 260 | r->id.idiag_dst[0] = tw->tw_daddr; |
Daniel Borkmann | b1aac81 | 2013-12-17 00:38:39 +0100 | [diff] [blame] | 261 | |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 262 | r->idiag_state = tw->tw_substate; |
| 263 | r->idiag_timer = 3; |
Eric Dumazet | 96f817f | 2013-10-03 14:27:25 -0700 | [diff] [blame] | 264 | r->idiag_expires = jiffies_to_msecs(tmo); |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 265 | r->idiag_rqueue = 0; |
| 266 | r->idiag_wqueue = 0; |
| 267 | r->idiag_uid = 0; |
| 268 | r->idiag_inode = 0; |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 269 | #if IS_ENABLED(CONFIG_IPV6) |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 270 | if (tw->tw_family == AF_INET6) { |
Eric Dumazet | efe4208 | 2013-10-03 15:42:29 -0700 | [diff] [blame] | 271 | *(struct in6_addr *)r->id.idiag_src = tw->tw_v6_rcv_saddr; |
| 272 | *(struct in6_addr *)r->id.idiag_dst = tw->tw_v6_daddr; |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 273 | } |
| 274 | #endif |
Thomas Graf | 6e277ed | 2012-06-26 23:36:12 +0000 | [diff] [blame] | 275 | |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 276 | nlmsg_end(skb, nlh); |
| 277 | return 0; |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 278 | } |
| 279 | |
Arnaldo Carvalho de Melo | dff2c03 | 2006-01-09 14:56:56 -0800 | [diff] [blame] | 280 | static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, |
Eric Dumazet | 34160ea | 2015-03-10 07:15:54 -0700 | [diff] [blame] | 281 | const struct inet_diag_req_v2 *r, |
Eric W. Biederman | d06ca95 | 2012-05-24 17:58:08 -0600 | [diff] [blame] | 282 | struct user_namespace *user_ns, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 283 | u32 portid, u32 seq, u16 nlmsg_flags, |
Arnaldo Carvalho de Melo | dff2c03 | 2006-01-09 14:56:56 -0800 | [diff] [blame] | 284 | const struct nlmsghdr *unlh) |
| 285 | { |
| 286 | if (sk->sk_state == TCP_TIME_WAIT) |
Eric Dumazet | 33cf7c9 | 2015-03-11 18:53:14 -0700 | [diff] [blame] | 287 | return inet_twsk_diag_fill(sk, skb, r, portid, seq, |
Eric Dumazet | efe4208 | 2013-10-03 15:42:29 -0700 | [diff] [blame] | 288 | nlmsg_flags, unlh); |
| 289 | |
| 290 | return inet_csk_diag_fill(sk, skb, r, user_ns, portid, seq, |
| 291 | nlmsg_flags, unlh); |
Arnaldo Carvalho de Melo | dff2c03 | 2006-01-09 14:56:56 -0800 | [diff] [blame] | 292 | } |
| 293 | |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 294 | int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo, |
| 295 | struct sk_buff *in_skb, |
| 296 | const struct nlmsghdr *nlh, |
Eric Dumazet | 34160ea | 2015-03-10 07:15:54 -0700 | [diff] [blame] | 297 | const struct inet_diag_req_v2 *req) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | { |
Andrey Vagin | 51d7ccc | 2012-07-16 04:28:49 +0000 | [diff] [blame] | 299 | struct net *net = sock_net(in_skb->sk); |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 300 | struct sk_buff *rep; |
| 301 | struct sock *sk; |
| 302 | int err; |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 303 | |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 304 | err = -EINVAL; |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 305 | if (req->sdiag_family == AF_INET) |
Andrey Vagin | 51d7ccc | 2012-07-16 04:28:49 +0000 | [diff] [blame] | 306 | sk = inet_lookup(net, hashinfo, req->id.idiag_dst[0], |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 307 | req->id.idiag_dport, req->id.idiag_src[0], |
| 308 | req->id.idiag_sport, req->id.idiag_if); |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 309 | #if IS_ENABLED(CONFIG_IPV6) |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 310 | else if (req->sdiag_family == AF_INET6) |
Andrey Vagin | 51d7ccc | 2012-07-16 04:28:49 +0000 | [diff] [blame] | 311 | sk = inet6_lookup(net, hashinfo, |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 312 | (struct in6_addr *)req->id.idiag_dst, |
| 313 | req->id.idiag_dport, |
| 314 | (struct in6_addr *)req->id.idiag_src, |
| 315 | req->id.idiag_sport, |
| 316 | req->id.idiag_if); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | #endif |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 318 | else |
Pavel Emelyanov | 476f7db | 2011-12-09 06:22:10 +0000 | [diff] [blame] | 319 | goto out_nosk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 321 | err = -ENOENT; |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 322 | if (!sk) |
Pavel Emelyanov | 476f7db | 2011-12-09 06:22:10 +0000 | [diff] [blame] | 323 | goto out_nosk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | |
Pavel Emelyanov | f65c1b5 | 2011-12-15 02:43:44 +0000 | [diff] [blame] | 325 | err = sock_diag_check_cookie(sk, req->id.idiag_cookie); |
Pavel Emelyanov | b005ab4 | 2011-12-09 06:21:53 +0000 | [diff] [blame] | 326 | if (err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | goto out; |
| 328 | |
Thomas Graf | 6e277ed | 2012-06-26 23:36:12 +0000 | [diff] [blame] | 329 | rep = nlmsg_new(sizeof(struct inet_diag_msg) + |
| 330 | sizeof(struct inet_diag_meminfo) + |
| 331 | sizeof(struct tcp_info) + 64, GFP_KERNEL); |
| 332 | if (!rep) { |
| 333 | err = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | goto out; |
Thomas Graf | 6e277ed | 2012-06-26 23:36:12 +0000 | [diff] [blame] | 335 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | |
Pavel Emelyanov | a029fe2 | 2011-12-06 07:59:32 +0000 | [diff] [blame] | 337 | err = sk_diag_fill(sk, rep, req, |
Patrick McHardy | e32123e | 2013-04-17 06:46:57 +0000 | [diff] [blame] | 338 | sk_user_ns(NETLINK_CB(in_skb).sk), |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 339 | NETLINK_CB(in_skb).portid, |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 340 | nlh->nlmsg_seq, 0, nlh); |
| 341 | if (err < 0) { |
| 342 | WARN_ON(err == -EMSGSIZE); |
Thomas Graf | 6e277ed | 2012-06-26 23:36:12 +0000 | [diff] [blame] | 343 | nlmsg_free(rep); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 344 | goto out; |
| 345 | } |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 346 | err = netlink_unicast(net->diag_nlsk, rep, NETLINK_CB(in_skb).portid, |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 347 | MSG_DONTWAIT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | if (err > 0) |
| 349 | err = 0; |
| 350 | |
| 351 | out: |
Eric Dumazet | c1d607c | 2013-10-11 08:54:49 -0700 | [diff] [blame] | 352 | if (sk) |
| 353 | sock_gen_put(sk); |
| 354 | |
Pavel Emelyanov | 476f7db | 2011-12-09 06:22:10 +0000 | [diff] [blame] | 355 | out_nosk: |
| 356 | return err; |
| 357 | } |
Pavel Emelyanov | 1942c51 | 2011-12-09 06:23:18 +0000 | [diff] [blame] | 358 | EXPORT_SYMBOL_GPL(inet_diag_dump_one_icsk); |
Pavel Emelyanov | 476f7db | 2011-12-09 06:22:10 +0000 | [diff] [blame] | 359 | |
| 360 | static int inet_diag_get_exact(struct sk_buff *in_skb, |
| 361 | const struct nlmsghdr *nlh, |
Eric Dumazet | 34160ea | 2015-03-10 07:15:54 -0700 | [diff] [blame] | 362 | const struct inet_diag_req_v2 *req) |
Pavel Emelyanov | 476f7db | 2011-12-09 06:22:10 +0000 | [diff] [blame] | 363 | { |
| 364 | const struct inet_diag_handler *handler; |
| 365 | int err; |
| 366 | |
| 367 | handler = inet_diag_lock_handler(req->sdiag_protocol); |
| 368 | if (IS_ERR(handler)) |
| 369 | err = PTR_ERR(handler); |
| 370 | else |
Pavel Emelyanov | 1942c51 | 2011-12-09 06:23:18 +0000 | [diff] [blame] | 371 | err = handler->dump_one(in_skb, nlh, req); |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 372 | inet_diag_unlock_handler(handler); |
Pavel Emelyanov | 476f7db | 2011-12-09 06:22:10 +0000 | [diff] [blame] | 373 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | return err; |
| 375 | } |
| 376 | |
Al Viro | 9f85529 | 2006-09-27 18:44:30 -0700 | [diff] [blame] | 377 | static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | { |
| 379 | int words = bits >> 5; |
| 380 | |
| 381 | bits &= 0x1f; |
| 382 | |
| 383 | if (words) { |
| 384 | if (memcmp(a1, a2, words << 2)) |
| 385 | return 0; |
| 386 | } |
| 387 | if (bits) { |
Al Viro | 9f85529 | 2006-09-27 18:44:30 -0700 | [diff] [blame] | 388 | __be32 w1, w2; |
| 389 | __be32 mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | |
| 391 | w1 = a1[words]; |
| 392 | w2 = a2[words]; |
| 393 | |
| 394 | mask = htonl((0xffffffff) << (32 - bits)); |
| 395 | |
| 396 | if ((w1 ^ w2) & mask) |
| 397 | return 0; |
| 398 | } |
| 399 | |
| 400 | return 1; |
| 401 | } |
| 402 | |
Pavel Emelyanov | 87c22ea | 2011-12-09 06:21:34 +0000 | [diff] [blame] | 403 | static int inet_diag_bc_run(const struct nlattr *_bc, |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 404 | const struct inet_diag_entry *entry) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | { |
Pavel Emelyanov | 87c22ea | 2011-12-09 06:21:34 +0000 | [diff] [blame] | 406 | const void *bc = nla_data(_bc); |
| 407 | int len = nla_len(_bc); |
| 408 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | while (len > 0) { |
| 410 | int yes = 1; |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 411 | const struct inet_diag_bc_op *op = bc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | |
| 413 | switch (op->code) { |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 414 | case INET_DIAG_BC_NOP: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | break; |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 416 | case INET_DIAG_BC_JMP: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | yes = 0; |
| 418 | break; |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 419 | case INET_DIAG_BC_S_GE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | yes = entry->sport >= op[1].no; |
| 421 | break; |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 422 | case INET_DIAG_BC_S_LE: |
Roel Kluin | b4ced2b | 2010-01-19 14:12:20 -0800 | [diff] [blame] | 423 | yes = entry->sport <= op[1].no; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | break; |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 425 | case INET_DIAG_BC_D_GE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | yes = entry->dport >= op[1].no; |
| 427 | break; |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 428 | case INET_DIAG_BC_D_LE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | yes = entry->dport <= op[1].no; |
| 430 | break; |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 431 | case INET_DIAG_BC_AUTO: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | yes = !(entry->userlocks & SOCK_BINDPORT_LOCK); |
| 433 | break; |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 434 | case INET_DIAG_BC_S_COND: |
Arnaldo Carvalho de Melo | a8c2190 | 2005-08-12 12:56:38 -0300 | [diff] [blame] | 435 | case INET_DIAG_BC_D_COND: { |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 436 | const struct inet_diag_hostcond *cond; |
| 437 | const __be32 *addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 439 | cond = (const struct inet_diag_hostcond *)(op + 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | if (cond->port != -1 && |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 441 | cond->port != (op->code == INET_DIAG_BC_S_COND ? |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | entry->sport : entry->dport)) { |
| 443 | yes = 0; |
| 444 | break; |
| 445 | } |
Arnaldo Carvalho de Melo | 4e852c0 | 2006-01-09 14:56:19 -0800 | [diff] [blame] | 446 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 447 | if (op->code == INET_DIAG_BC_S_COND) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | addr = entry->saddr; |
| 449 | else |
| 450 | addr = entry->daddr; |
| 451 | |
Neal Cardwell | f67caec | 2012-12-08 19:43:23 +0000 | [diff] [blame] | 452 | if (cond->family != AF_UNSPEC && |
| 453 | cond->family != entry->family) { |
| 454 | if (entry->family == AF_INET6 && |
| 455 | cond->family == AF_INET) { |
| 456 | if (addr[0] == 0 && addr[1] == 0 && |
| 457 | addr[2] == htonl(0xffff) && |
| 458 | bitstring_match(addr + 3, |
| 459 | cond->addr, |
| 460 | cond->prefix_len)) |
| 461 | break; |
| 462 | } |
| 463 | yes = 0; |
| 464 | break; |
| 465 | } |
| 466 | |
| 467 | if (cond->prefix_len == 0) |
| 468 | break; |
Arnaldo Carvalho de Melo | 4e852c0 | 2006-01-09 14:56:19 -0800 | [diff] [blame] | 469 | if (bitstring_match(addr, cond->addr, |
| 470 | cond->prefix_len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | yes = 0; |
| 473 | break; |
| 474 | } |
| 475 | } |
| 476 | |
Arnaldo Carvalho de Melo | 4e852c0 | 2006-01-09 14:56:19 -0800 | [diff] [blame] | 477 | if (yes) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | len -= op->yes; |
| 479 | bc += op->yes; |
| 480 | } else { |
| 481 | len -= op->no; |
| 482 | bc += op->no; |
| 483 | } |
| 484 | } |
Eric Dumazet | a02cec2 | 2010-09-22 20:43:57 +0000 | [diff] [blame] | 485 | return len == 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | } |
| 487 | |
Pavel Emelyanov | 8d07d15 | 2011-12-09 06:22:44 +0000 | [diff] [blame] | 488 | int inet_diag_bc_sk(const struct nlattr *bc, struct sock *sk) |
| 489 | { |
Pavel Emelyanov | 8d07d15 | 2011-12-09 06:22:44 +0000 | [diff] [blame] | 490 | struct inet_sock *inet = inet_sk(sk); |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 491 | struct inet_diag_entry entry; |
Pavel Emelyanov | 8d07d15 | 2011-12-09 06:22:44 +0000 | [diff] [blame] | 492 | |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 493 | if (!bc) |
Pavel Emelyanov | 8d07d15 | 2011-12-09 06:22:44 +0000 | [diff] [blame] | 494 | return 1; |
| 495 | |
| 496 | entry.family = sk->sk_family; |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 497 | #if IS_ENABLED(CONFIG_IPV6) |
Pavel Emelyanov | 8d07d15 | 2011-12-09 06:22:44 +0000 | [diff] [blame] | 498 | if (entry.family == AF_INET6) { |
Eric Dumazet | efe4208 | 2013-10-03 15:42:29 -0700 | [diff] [blame] | 499 | entry.saddr = sk->sk_v6_rcv_saddr.s6_addr32; |
| 500 | entry.daddr = sk->sk_v6_daddr.s6_addr32; |
Pavel Emelyanov | 8d07d15 | 2011-12-09 06:22:44 +0000 | [diff] [blame] | 501 | } else |
| 502 | #endif |
| 503 | { |
| 504 | entry.saddr = &inet->inet_rcv_saddr; |
| 505 | entry.daddr = &inet->inet_daddr; |
| 506 | } |
| 507 | entry.sport = inet->inet_num; |
| 508 | entry.dport = ntohs(inet->inet_dport); |
Eric Dumazet | 4961272 | 2015-03-05 10:18:14 -0800 | [diff] [blame] | 509 | entry.userlocks = (sk->sk_state != TCP_TIME_WAIT) ? sk->sk_userlocks : 0; |
Pavel Emelyanov | 8d07d15 | 2011-12-09 06:22:44 +0000 | [diff] [blame] | 510 | |
| 511 | return inet_diag_bc_run(bc, &entry); |
| 512 | } |
| 513 | EXPORT_SYMBOL_GPL(inet_diag_bc_sk); |
| 514 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | static int valid_cc(const void *bc, int len, int cc) |
| 516 | { |
| 517 | while (len >= 0) { |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 518 | const struct inet_diag_bc_op *op = bc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | |
| 520 | if (cc > len) |
| 521 | return 0; |
| 522 | if (cc == len) |
| 523 | return 1; |
Eric Dumazet | eeb1497 | 2011-06-17 16:25:39 -0400 | [diff] [blame] | 524 | if (op->yes < 4 || op->yes & 3) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | return 0; |
| 526 | len -= op->yes; |
| 527 | bc += op->yes; |
| 528 | } |
| 529 | return 0; |
| 530 | } |
| 531 | |
Neal Cardwell | 405c005 | 2012-12-08 19:43:22 +0000 | [diff] [blame] | 532 | /* Validate an inet_diag_hostcond. */ |
| 533 | static bool valid_hostcond(const struct inet_diag_bc_op *op, int len, |
| 534 | int *min_len) |
| 535 | { |
Neal Cardwell | 405c005 | 2012-12-08 19:43:22 +0000 | [diff] [blame] | 536 | struct inet_diag_hostcond *cond; |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 537 | int addr_len; |
Neal Cardwell | 405c005 | 2012-12-08 19:43:22 +0000 | [diff] [blame] | 538 | |
| 539 | /* Check hostcond space. */ |
| 540 | *min_len += sizeof(struct inet_diag_hostcond); |
| 541 | if (len < *min_len) |
| 542 | return false; |
| 543 | cond = (struct inet_diag_hostcond *)(op + 1); |
| 544 | |
| 545 | /* Check address family and address length. */ |
| 546 | switch (cond->family) { |
| 547 | case AF_UNSPEC: |
| 548 | addr_len = 0; |
| 549 | break; |
| 550 | case AF_INET: |
| 551 | addr_len = sizeof(struct in_addr); |
| 552 | break; |
| 553 | case AF_INET6: |
| 554 | addr_len = sizeof(struct in6_addr); |
| 555 | break; |
| 556 | default: |
| 557 | return false; |
| 558 | } |
| 559 | *min_len += addr_len; |
| 560 | if (len < *min_len) |
| 561 | return false; |
| 562 | |
| 563 | /* Check prefix length (in bits) vs address length (in bytes). */ |
| 564 | if (cond->prefix_len > 8 * addr_len) |
| 565 | return false; |
| 566 | |
| 567 | return true; |
| 568 | } |
| 569 | |
Neal Cardwell | 5e1f542 | 2012-12-09 11:09:54 +0000 | [diff] [blame] | 570 | /* Validate a port comparison operator. */ |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 571 | static bool valid_port_comparison(const struct inet_diag_bc_op *op, |
| 572 | int len, int *min_len) |
Neal Cardwell | 5e1f542 | 2012-12-09 11:09:54 +0000 | [diff] [blame] | 573 | { |
| 574 | /* Port comparisons put the port in a follow-on inet_diag_bc_op. */ |
| 575 | *min_len += sizeof(struct inet_diag_bc_op); |
| 576 | if (len < *min_len) |
| 577 | return false; |
| 578 | return true; |
| 579 | } |
| 580 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 581 | static int inet_diag_bc_audit(const void *bytecode, int bytecode_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | { |
Eric Dumazet | eeb1497 | 2011-06-17 16:25:39 -0400 | [diff] [blame] | 583 | const void *bc = bytecode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | int len = bytecode_len; |
| 585 | |
| 586 | while (len > 0) { |
Neal Cardwell | 405c005 | 2012-12-08 19:43:22 +0000 | [diff] [blame] | 587 | int min_len = sizeof(struct inet_diag_bc_op); |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 588 | const struct inet_diag_bc_op *op = bc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | switch (op->code) { |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 591 | case INET_DIAG_BC_S_COND: |
| 592 | case INET_DIAG_BC_D_COND: |
Neal Cardwell | 405c005 | 2012-12-08 19:43:22 +0000 | [diff] [blame] | 593 | if (!valid_hostcond(bc, len, &min_len)) |
| 594 | return -EINVAL; |
Neal Cardwell | 5e1f542 | 2012-12-09 11:09:54 +0000 | [diff] [blame] | 595 | break; |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 596 | case INET_DIAG_BC_S_GE: |
| 597 | case INET_DIAG_BC_S_LE: |
| 598 | case INET_DIAG_BC_D_GE: |
| 599 | case INET_DIAG_BC_D_LE: |
Neal Cardwell | 5e1f542 | 2012-12-09 11:09:54 +0000 | [diff] [blame] | 600 | if (!valid_port_comparison(bc, len, &min_len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | return -EINVAL; |
| 602 | break; |
Neal Cardwell | 5e1f542 | 2012-12-09 11:09:54 +0000 | [diff] [blame] | 603 | case INET_DIAG_BC_AUTO: |
| 604 | case INET_DIAG_BC_JMP: |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 605 | case INET_DIAG_BC_NOP: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | break; |
| 607 | default: |
| 608 | return -EINVAL; |
| 609 | } |
Neal Cardwell | 5e1f542 | 2012-12-09 11:09:54 +0000 | [diff] [blame] | 610 | |
| 611 | if (op->code != INET_DIAG_BC_NOP) { |
| 612 | if (op->no < min_len || op->no > len + 4 || op->no & 3) |
| 613 | return -EINVAL; |
| 614 | if (op->no < len && |
| 615 | !valid_cc(bytecode, bytecode_len, len - op->no)) |
| 616 | return -EINVAL; |
| 617 | } |
| 618 | |
Neal Cardwell | 405c005 | 2012-12-08 19:43:22 +0000 | [diff] [blame] | 619 | if (op->yes < min_len || op->yes > len + 4 || op->yes & 3) |
Eric Dumazet | eeb1497 | 2011-06-17 16:25:39 -0400 | [diff] [blame] | 620 | return -EINVAL; |
Arnaldo Carvalho de Melo | 4e852c0 | 2006-01-09 14:56:19 -0800 | [diff] [blame] | 621 | bc += op->yes; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | len -= op->yes; |
| 623 | } |
| 624 | return len == 0 ? 0 : -EINVAL; |
| 625 | } |
| 626 | |
Arnaldo Carvalho de Melo | dff2c03 | 2006-01-09 14:56:56 -0800 | [diff] [blame] | 627 | static int inet_csk_diag_dump(struct sock *sk, |
| 628 | struct sk_buff *skb, |
Pavel Emelyanov | 37f352b | 2011-12-06 07:57:26 +0000 | [diff] [blame] | 629 | struct netlink_callback *cb, |
Eric Dumazet | 34160ea | 2015-03-10 07:15:54 -0700 | [diff] [blame] | 630 | const struct inet_diag_req_v2 *r, |
Pavel Emelyanov | 37f352b | 2011-12-06 07:57:26 +0000 | [diff] [blame] | 631 | const struct nlattr *bc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | { |
Pavel Emelyanov | 8d07d15 | 2011-12-09 06:22:44 +0000 | [diff] [blame] | 633 | if (!inet_diag_bc_sk(bc, sk)) |
| 634 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | |
Pavel Emelyanov | a029fe2 | 2011-12-06 07:59:32 +0000 | [diff] [blame] | 636 | return inet_csk_diag_fill(sk, skb, r, |
Patrick McHardy | e32123e | 2013-04-17 06:46:57 +0000 | [diff] [blame] | 637 | sk_user_ns(NETLINK_CB(cb->skb).sk), |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 638 | NETLINK_CB(cb->skb).portid, |
Arnaldo Carvalho de Melo | dff2c03 | 2006-01-09 14:56:56 -0800 | [diff] [blame] | 639 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | } |
| 641 | |
Eric Dumazet | 4961272 | 2015-03-05 10:18:14 -0800 | [diff] [blame] | 642 | static void twsk_build_assert(void) |
| 643 | { |
| 644 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_family) != |
| 645 | offsetof(struct sock, sk_family)); |
| 646 | |
| 647 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_num) != |
| 648 | offsetof(struct inet_sock, inet_num)); |
| 649 | |
| 650 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_dport) != |
| 651 | offsetof(struct inet_sock, inet_dport)); |
| 652 | |
| 653 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_rcv_saddr) != |
| 654 | offsetof(struct inet_sock, inet_rcv_saddr)); |
| 655 | |
| 656 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_daddr) != |
| 657 | offsetof(struct inet_sock, inet_daddr)); |
| 658 | |
| 659 | #if IS_ENABLED(CONFIG_IPV6) |
| 660 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_v6_rcv_saddr) != |
| 661 | offsetof(struct sock, sk_v6_rcv_saddr)); |
| 662 | |
| 663 | BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_v6_daddr) != |
| 664 | offsetof(struct sock, sk_v6_daddr)); |
| 665 | #endif |
| 666 | } |
| 667 | |
Eric Dumazet | 05dbc7b | 2013-10-03 00:22:02 -0700 | [diff] [blame] | 668 | static int inet_twsk_diag_dump(struct sock *sk, |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 669 | struct sk_buff *skb, |
Pavel Emelyanov | 37f352b | 2011-12-06 07:57:26 +0000 | [diff] [blame] | 670 | struct netlink_callback *cb, |
Eric Dumazet | 34160ea | 2015-03-10 07:15:54 -0700 | [diff] [blame] | 671 | const struct inet_diag_req_v2 *r, |
Pavel Emelyanov | 37f352b | 2011-12-06 07:57:26 +0000 | [diff] [blame] | 672 | const struct nlattr *bc) |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 673 | { |
Eric Dumazet | 4961272 | 2015-03-05 10:18:14 -0800 | [diff] [blame] | 674 | twsk_build_assert(); |
Eric Dumazet | 05dbc7b | 2013-10-03 00:22:02 -0700 | [diff] [blame] | 675 | |
Eric Dumazet | 4961272 | 2015-03-05 10:18:14 -0800 | [diff] [blame] | 676 | if (!inet_diag_bc_sk(bc, sk)) |
| 677 | return 0; |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 678 | |
Eric Dumazet | 33cf7c9 | 2015-03-11 18:53:14 -0700 | [diff] [blame] | 679 | return inet_twsk_diag_fill(sk, skb, r, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 680 | NETLINK_CB(cb->skb).portid, |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 681 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); |
| 682 | } |
| 683 | |
Neal Cardwell | 1c95df8 | 2012-12-08 19:43:21 +0000 | [diff] [blame] | 684 | /* Get the IPv4, IPv6, or IPv4-mapped-IPv6 local and remote addresses |
| 685 | * from a request_sock. For IPv4-mapped-IPv6 we must map IPv4 to IPv6. |
| 686 | */ |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 687 | static void inet_diag_req_addrs(const struct sock *sk, |
| 688 | const struct request_sock *req, |
| 689 | struct inet_diag_entry *entry) |
Neal Cardwell | 1c95df8 | 2012-12-08 19:43:21 +0000 | [diff] [blame] | 690 | { |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 691 | const struct inet_request_sock *ireq = inet_rsk(req); |
Neal Cardwell | 1c95df8 | 2012-12-08 19:43:21 +0000 | [diff] [blame] | 692 | |
| 693 | #if IS_ENABLED(CONFIG_IPV6) |
| 694 | if (sk->sk_family == AF_INET6) { |
| 695 | if (req->rsk_ops->family == AF_INET6) { |
Eric Dumazet | 634fb979 | 2013-10-09 15:21:29 -0700 | [diff] [blame] | 696 | entry->saddr = ireq->ir_v6_loc_addr.s6_addr32; |
| 697 | entry->daddr = ireq->ir_v6_rmt_addr.s6_addr32; |
Neal Cardwell | 1c95df8 | 2012-12-08 19:43:21 +0000 | [diff] [blame] | 698 | } else if (req->rsk_ops->family == AF_INET) { |
Eric Dumazet | 634fb979 | 2013-10-09 15:21:29 -0700 | [diff] [blame] | 699 | ipv6_addr_set_v4mapped(ireq->ir_loc_addr, |
Neal Cardwell | 1c95df8 | 2012-12-08 19:43:21 +0000 | [diff] [blame] | 700 | &entry->saddr_storage); |
Eric Dumazet | 634fb979 | 2013-10-09 15:21:29 -0700 | [diff] [blame] | 701 | ipv6_addr_set_v4mapped(ireq->ir_rmt_addr, |
Neal Cardwell | 1c95df8 | 2012-12-08 19:43:21 +0000 | [diff] [blame] | 702 | &entry->daddr_storage); |
| 703 | entry->saddr = entry->saddr_storage.s6_addr32; |
| 704 | entry->daddr = entry->daddr_storage.s6_addr32; |
| 705 | } |
| 706 | } else |
| 707 | #endif |
| 708 | { |
Eric Dumazet | 634fb979 | 2013-10-09 15:21:29 -0700 | [diff] [blame] | 709 | entry->saddr = &ireq->ir_loc_addr; |
| 710 | entry->daddr = &ireq->ir_rmt_addr; |
Neal Cardwell | 1c95df8 | 2012-12-08 19:43:21 +0000 | [diff] [blame] | 711 | } |
| 712 | } |
| 713 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 714 | static int inet_diag_fill_req(struct sk_buff *skb, struct sock *sk, |
Eric W. Biederman | d06ca95 | 2012-05-24 17:58:08 -0600 | [diff] [blame] | 715 | struct request_sock *req, |
| 716 | struct user_namespace *user_ns, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 717 | u32 portid, u32 seq, |
Arnaldo Carvalho de Melo | 4e852c0 | 2006-01-09 14:56:19 -0800 | [diff] [blame] | 718 | const struct nlmsghdr *unlh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 719 | { |
Arnaldo Carvalho de Melo | 2e6599c | 2005-06-18 22:46:52 -0700 | [diff] [blame] | 720 | const struct inet_request_sock *ireq = inet_rsk(req); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 721 | struct inet_sock *inet = inet_sk(sk); |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 722 | struct inet_diag_msg *r; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | struct nlmsghdr *nlh; |
| 724 | long tmo; |
| 725 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 726 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), |
Thomas Graf | 6e277ed | 2012-06-26 23:36:12 +0000 | [diff] [blame] | 727 | NLM_F_MULTI); |
| 728 | if (!nlh) |
| 729 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | |
Thomas Graf | 6e277ed | 2012-06-26 23:36:12 +0000 | [diff] [blame] | 731 | r = nlmsg_data(nlh); |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 732 | r->idiag_family = sk->sk_family; |
| 733 | r->idiag_state = TCP_SYN_RECV; |
| 734 | r->idiag_timer = 1; |
Eric Dumazet | e6c022a | 2012-10-27 23:16:46 +0000 | [diff] [blame] | 735 | r->idiag_retrans = req->num_retrans; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 737 | r->id.idiag_if = sk->sk_bound_dev_if; |
Eric Dumazet | 33cf7c9 | 2015-03-11 18:53:14 -0700 | [diff] [blame] | 738 | |
| 739 | BUILD_BUG_ON(offsetof(struct inet_request_sock, ir_cookie) != |
| 740 | offsetof(struct sock, sk_cookie)); |
| 741 | sock_diag_save_cookie((struct sock *)ireq, r->id.idiag_cookie); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | |
| 743 | tmo = req->expires - jiffies; |
| 744 | if (tmo < 0) |
| 745 | tmo = 0; |
| 746 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 747 | r->id.idiag_sport = inet->inet_sport; |
Eric Dumazet | 634fb979 | 2013-10-09 15:21:29 -0700 | [diff] [blame] | 748 | r->id.idiag_dport = ireq->ir_rmt_port; |
Daniel Borkmann | b1aac81 | 2013-12-17 00:38:39 +0100 | [diff] [blame] | 749 | |
| 750 | memset(&r->id.idiag_src, 0, sizeof(r->id.idiag_src)); |
| 751 | memset(&r->id.idiag_dst, 0, sizeof(r->id.idiag_dst)); |
| 752 | |
Eric Dumazet | 634fb979 | 2013-10-09 15:21:29 -0700 | [diff] [blame] | 753 | r->id.idiag_src[0] = ireq->ir_loc_addr; |
| 754 | r->id.idiag_dst[0] = ireq->ir_rmt_addr; |
Daniel Borkmann | b1aac81 | 2013-12-17 00:38:39 +0100 | [diff] [blame] | 755 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 756 | r->idiag_expires = jiffies_to_msecs(tmo); |
| 757 | r->idiag_rqueue = 0; |
| 758 | r->idiag_wqueue = 0; |
Eric W. Biederman | d06ca95 | 2012-05-24 17:58:08 -0600 | [diff] [blame] | 759 | r->idiag_uid = from_kuid_munged(user_ns, sock_i_uid(sk)); |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 760 | r->idiag_inode = 0; |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 761 | #if IS_ENABLED(CONFIG_IPV6) |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 762 | if (r->idiag_family == AF_INET6) { |
Neal Cardwell | 1c95df8 | 2012-12-08 19:43:21 +0000 | [diff] [blame] | 763 | struct inet_diag_entry entry; |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 764 | |
Neal Cardwell | 1c95df8 | 2012-12-08 19:43:21 +0000 | [diff] [blame] | 765 | inet_diag_req_addrs(sk, req, &entry); |
| 766 | memcpy(r->id.idiag_src, entry.saddr, sizeof(struct in6_addr)); |
| 767 | memcpy(r->id.idiag_dst, entry.daddr, sizeof(struct in6_addr)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | } |
| 769 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 771 | nlmsg_end(skb, nlh); |
| 772 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | } |
| 774 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 775 | static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk, |
Pavel Emelyanov | 37f352b | 2011-12-06 07:57:26 +0000 | [diff] [blame] | 776 | struct netlink_callback *cb, |
Eric Dumazet | 34160ea | 2015-03-10 07:15:54 -0700 | [diff] [blame] | 777 | const struct inet_diag_req_v2 *r, |
Pavel Emelyanov | 37f352b | 2011-12-06 07:57:26 +0000 | [diff] [blame] | 778 | const struct nlattr *bc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | { |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 780 | struct inet_connection_sock *icsk = inet_csk(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | struct inet_sock *inet = inet_sk(sk); |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 782 | struct inet_diag_entry entry; |
| 783 | int j, s_j, reqnum, s_reqnum; |
| 784 | struct listen_sock *lopt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 785 | int err = 0; |
| 786 | |
| 787 | s_j = cb->args[3]; |
| 788 | s_reqnum = cb->args[4]; |
| 789 | |
| 790 | if (s_j > 0) |
| 791 | s_j--; |
| 792 | |
| 793 | entry.family = sk->sk_family; |
| 794 | |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 795 | read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 797 | lopt = icsk->icsk_accept_queue.listen_opt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | if (!lopt || !lopt->qlen) |
| 799 | goto out; |
| 800 | |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 801 | if (bc) { |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 802 | entry.sport = inet->inet_num; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 803 | entry.userlocks = sk->sk_userlocks; |
| 804 | } |
| 805 | |
Arnaldo Carvalho de Melo | 540722f | 2005-08-10 05:54:28 -0300 | [diff] [blame] | 806 | for (j = s_j; j < lopt->nr_table_entries; j++) { |
Arnaldo Carvalho de Melo | 60236fd | 2005-06-18 22:47:21 -0700 | [diff] [blame] | 807 | struct request_sock *req, *head = lopt->syn_table[j]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | |
| 809 | reqnum = 0; |
| 810 | for (req = head; req; reqnum++, req = req->dl_next) { |
Arnaldo Carvalho de Melo | 2e6599c | 2005-06-18 22:46:52 -0700 | [diff] [blame] | 811 | struct inet_request_sock *ireq = inet_rsk(req); |
| 812 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | if (reqnum < s_reqnum) |
| 814 | continue; |
Eric Dumazet | 634fb979 | 2013-10-09 15:21:29 -0700 | [diff] [blame] | 815 | if (r->id.idiag_dport != ireq->ir_rmt_port && |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 816 | r->id.idiag_dport) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | continue; |
| 818 | |
| 819 | if (bc) { |
Neal Cardwell | 1c95df8 | 2012-12-08 19:43:21 +0000 | [diff] [blame] | 820 | inet_diag_req_addrs(sk, req, &entry); |
Eric Dumazet | 634fb979 | 2013-10-09 15:21:29 -0700 | [diff] [blame] | 821 | entry.dport = ntohs(ireq->ir_rmt_port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | |
Pavel Emelyanov | 87c22ea | 2011-12-09 06:21:34 +0000 | [diff] [blame] | 823 | if (!inet_diag_bc_run(bc, &entry)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | continue; |
| 825 | } |
| 826 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 827 | err = inet_diag_fill_req(skb, sk, req, |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 828 | sk_user_ns(NETLINK_CB(cb->skb).sk), |
| 829 | NETLINK_CB(cb->skb).portid, |
| 830 | cb->nlh->nlmsg_seq, cb->nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | if (err < 0) { |
| 832 | cb->args[3] = j + 1; |
| 833 | cb->args[4] = reqnum; |
| 834 | goto out; |
| 835 | } |
| 836 | } |
| 837 | |
| 838 | s_reqnum = 0; |
| 839 | } |
| 840 | |
| 841 | out: |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 842 | read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 843 | |
| 844 | return err; |
| 845 | } |
| 846 | |
Pavel Emelyanov | 1942c51 | 2011-12-09 06:23:18 +0000 | [diff] [blame] | 847 | void inet_diag_dump_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *skb, |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 848 | struct netlink_callback *cb, |
Eric Dumazet | 34160ea | 2015-03-10 07:15:54 -0700 | [diff] [blame] | 849 | const struct inet_diag_req_v2 *r, struct nlattr *bc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 850 | { |
Andrey Vagin | 51d7ccc | 2012-07-16 04:28:49 +0000 | [diff] [blame] | 851 | struct net *net = sock_net(skb->sk); |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 852 | int i, num, s_i, s_num; |
Arnaldo Carvalho de Melo | 4e852c0 | 2006-01-09 14:56:19 -0800 | [diff] [blame] | 853 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 854 | s_i = cb->args[1]; |
| 855 | s_num = num = cb->args[2]; |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 856 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 857 | if (cb->args[0] == 0) { |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 858 | if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | goto skip_listen_ht; |
Arnaldo Carvalho de Melo | 540722f | 2005-08-10 05:54:28 -0300 | [diff] [blame] | 860 | |
Arnaldo Carvalho de Melo | 0f7ff92 | 2005-08-09 19:59:44 -0700 | [diff] [blame] | 861 | for (i = s_i; i < INET_LHTABLE_SIZE; i++) { |
Eric Dumazet | 5caea4e | 2008-11-20 00:40:07 -0800 | [diff] [blame] | 862 | struct inet_listen_hashbucket *ilb; |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 863 | struct hlist_nulls_node *node; |
| 864 | struct sock *sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | |
| 866 | num = 0; |
Eric Dumazet | 5caea4e | 2008-11-20 00:40:07 -0800 | [diff] [blame] | 867 | ilb = &hashinfo->listening_hash[i]; |
| 868 | spin_lock_bh(&ilb->lock); |
Eric Dumazet | c25eb3b | 2008-11-23 17:22:55 -0800 | [diff] [blame] | 869 | sk_nulls_for_each(sk, node, &ilb->head) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | struct inet_sock *inet = inet_sk(sk); |
| 871 | |
Andrey Vagin | 51d7ccc | 2012-07-16 04:28:49 +0000 | [diff] [blame] | 872 | if (!net_eq(sock_net(sk), net)) |
| 873 | continue; |
| 874 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 875 | if (num < s_num) { |
| 876 | num++; |
| 877 | continue; |
| 878 | } |
| 879 | |
Pavel Emelyanov | d23deaa | 2011-12-06 07:59:15 +0000 | [diff] [blame] | 880 | if (r->sdiag_family != AF_UNSPEC && |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 881 | sk->sk_family != r->sdiag_family) |
Pavel Emelyanov | d23deaa | 2011-12-06 07:59:15 +0000 | [diff] [blame] | 882 | goto next_listen; |
| 883 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 884 | if (r->id.idiag_sport != inet->inet_sport && |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 885 | r->id.idiag_sport) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | goto next_listen; |
| 887 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 888 | if (!(r->idiag_states & TCPF_LISTEN) || |
| 889 | r->id.idiag_dport || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | cb->args[3] > 0) |
| 891 | goto syn_recv; |
| 892 | |
Pavel Emelyanov | 25c4cd2 | 2011-12-06 07:58:58 +0000 | [diff] [blame] | 893 | if (inet_csk_diag_dump(sk, skb, cb, r, bc) < 0) { |
Eric Dumazet | 5caea4e | 2008-11-20 00:40:07 -0800 | [diff] [blame] | 894 | spin_unlock_bh(&ilb->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | goto done; |
| 896 | } |
| 897 | |
| 898 | syn_recv: |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 899 | if (!(r->idiag_states & TCPF_SYN_RECV)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 900 | goto next_listen; |
| 901 | |
Pavel Emelyanov | 25c4cd2 | 2011-12-06 07:58:58 +0000 | [diff] [blame] | 902 | if (inet_diag_dump_reqs(skb, sk, cb, r, bc) < 0) { |
Eric Dumazet | 5caea4e | 2008-11-20 00:40:07 -0800 | [diff] [blame] | 903 | spin_unlock_bh(&ilb->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | goto done; |
| 905 | } |
| 906 | |
| 907 | next_listen: |
| 908 | cb->args[3] = 0; |
| 909 | cb->args[4] = 0; |
| 910 | ++num; |
| 911 | } |
Eric Dumazet | 5caea4e | 2008-11-20 00:40:07 -0800 | [diff] [blame] | 912 | spin_unlock_bh(&ilb->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 913 | |
| 914 | s_num = 0; |
| 915 | cb->args[3] = 0; |
| 916 | cb->args[4] = 0; |
| 917 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | skip_listen_ht: |
| 919 | cb->args[0] = 1; |
| 920 | s_i = num = s_num = 0; |
| 921 | } |
| 922 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 923 | if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV))) |
Pavel Emelyanov | efb3cb4 | 2011-12-09 06:22:26 +0000 | [diff] [blame] | 924 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | |
Eric Dumazet | f373b53 | 2009-10-09 00:16:19 +0000 | [diff] [blame] | 926 | for (i = s_i; i <= hashinfo->ehash_mask; i++) { |
Arnaldo Carvalho de Melo | 540722f | 2005-08-10 05:54:28 -0300 | [diff] [blame] | 927 | struct inet_ehash_bucket *head = &hashinfo->ehash[i]; |
David S. Miller | 7e3aab4 | 2008-11-21 16:39:19 -0800 | [diff] [blame] | 928 | spinlock_t *lock = inet_ehash_lockp(hashinfo, i); |
Eric Dumazet | 3ab5aee | 2008-11-16 19:40:17 -0800 | [diff] [blame] | 929 | struct hlist_nulls_node *node; |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 930 | struct sock *sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | |
Andi Kleen | 6be547a | 2008-08-28 01:09:54 -0700 | [diff] [blame] | 932 | num = 0; |
| 933 | |
Eric Dumazet | 05dbc7b | 2013-10-03 00:22:02 -0700 | [diff] [blame] | 934 | if (hlist_nulls_empty(&head->chain)) |
Andi Kleen | 6be547a | 2008-08-28 01:09:54 -0700 | [diff] [blame] | 935 | continue; |
| 936 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | if (i > s_i) |
| 938 | s_num = 0; |
| 939 | |
David S. Miller | 7e3aab4 | 2008-11-21 16:39:19 -0800 | [diff] [blame] | 940 | spin_lock_bh(lock); |
Eric Dumazet | 3ab5aee | 2008-11-16 19:40:17 -0800 | [diff] [blame] | 941 | sk_nulls_for_each(sk, node, &head->chain) { |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 942 | int state, res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | |
Andrey Vagin | 51d7ccc | 2012-07-16 04:28:49 +0000 | [diff] [blame] | 944 | if (!net_eq(sock_net(sk), net)) |
| 945 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 946 | if (num < s_num) |
| 947 | goto next_normal; |
Neal Cardwell | 70315d2 | 2014-01-10 15:34:45 -0500 | [diff] [blame] | 948 | state = (sk->sk_state == TCP_TIME_WAIT) ? |
| 949 | inet_twsk(sk)->tw_substate : sk->sk_state; |
| 950 | if (!(r->idiag_states & (1 << state))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 951 | goto next_normal; |
Pavel Emelyanov | d23deaa | 2011-12-06 07:59:15 +0000 | [diff] [blame] | 952 | if (r->sdiag_family != AF_UNSPEC && |
Eric Dumazet | 05dbc7b | 2013-10-03 00:22:02 -0700 | [diff] [blame] | 953 | sk->sk_family != r->sdiag_family) |
Pavel Emelyanov | d23deaa | 2011-12-06 07:59:15 +0000 | [diff] [blame] | 954 | goto next_normal; |
Eric Dumazet | 05dbc7b | 2013-10-03 00:22:02 -0700 | [diff] [blame] | 955 | if (r->id.idiag_sport != htons(sk->sk_num) && |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 956 | r->id.idiag_sport) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 957 | goto next_normal; |
Eric Dumazet | 05dbc7b | 2013-10-03 00:22:02 -0700 | [diff] [blame] | 958 | if (r->id.idiag_dport != sk->sk_dport && |
Arnaldo Carvalho de Melo | 4e852c0 | 2006-01-09 14:56:19 -0800 | [diff] [blame] | 959 | r->id.idiag_dport) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 960 | goto next_normal; |
Eric Dumazet | 05dbc7b | 2013-10-03 00:22:02 -0700 | [diff] [blame] | 961 | if (sk->sk_state == TCP_TIME_WAIT) |
| 962 | res = inet_twsk_diag_dump(sk, skb, cb, r, bc); |
| 963 | else |
| 964 | res = inet_csk_diag_dump(sk, skb, cb, r, bc); |
| 965 | if (res < 0) { |
David S. Miller | 7e3aab4 | 2008-11-21 16:39:19 -0800 | [diff] [blame] | 966 | spin_unlock_bh(lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | goto done; |
| 968 | } |
| 969 | next_normal: |
| 970 | ++num; |
| 971 | } |
| 972 | |
David S. Miller | 7e3aab4 | 2008-11-21 16:39:19 -0800 | [diff] [blame] | 973 | spin_unlock_bh(lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 974 | } |
| 975 | |
| 976 | done: |
| 977 | cb->args[1] = i; |
| 978 | cb->args[2] = num; |
Pavel Emelyanov | efb3cb4 | 2011-12-09 06:22:26 +0000 | [diff] [blame] | 979 | out: |
| 980 | ; |
| 981 | } |
Pavel Emelyanov | 1942c51 | 2011-12-09 06:23:18 +0000 | [diff] [blame] | 982 | EXPORT_SYMBOL_GPL(inet_diag_dump_icsk); |
Pavel Emelyanov | efb3cb4 | 2011-12-09 06:22:26 +0000 | [diff] [blame] | 983 | |
| 984 | static int __inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb, |
Eric Dumazet | 34160ea | 2015-03-10 07:15:54 -0700 | [diff] [blame] | 985 | const struct inet_diag_req_v2 *r, |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 986 | struct nlattr *bc) |
Pavel Emelyanov | efb3cb4 | 2011-12-09 06:22:26 +0000 | [diff] [blame] | 987 | { |
| 988 | const struct inet_diag_handler *handler; |
Cyrill Gorcunov | cacb6ba | 2012-11-03 09:30:34 +0000 | [diff] [blame] | 989 | int err = 0; |
Pavel Emelyanov | efb3cb4 | 2011-12-09 06:22:26 +0000 | [diff] [blame] | 990 | |
| 991 | handler = inet_diag_lock_handler(r->sdiag_protocol); |
| 992 | if (!IS_ERR(handler)) |
Pavel Emelyanov | 1942c51 | 2011-12-09 06:23:18 +0000 | [diff] [blame] | 993 | handler->dump(skb, cb, r, bc); |
Cyrill Gorcunov | cacb6ba | 2012-11-03 09:30:34 +0000 | [diff] [blame] | 994 | else |
| 995 | err = PTR_ERR(handler); |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 996 | inet_diag_unlock_handler(handler); |
Pavel Emelyanov | efb3cb4 | 2011-12-09 06:22:26 +0000 | [diff] [blame] | 997 | |
Cyrill Gorcunov | cacb6ba | 2012-11-03 09:30:34 +0000 | [diff] [blame] | 998 | return err ? : skb->len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 999 | } |
| 1000 | |
Pavel Emelyanov | 25c4cd2 | 2011-12-06 07:58:58 +0000 | [diff] [blame] | 1001 | static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb) |
| 1002 | { |
Pavel Emelyanov | c899136 | 2012-01-10 22:36:35 +0000 | [diff] [blame] | 1003 | int hdrlen = sizeof(struct inet_diag_req_v2); |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 1004 | struct nlattr *bc = NULL; |
Pavel Emelyanov | 25c4cd2 | 2011-12-06 07:58:58 +0000 | [diff] [blame] | 1005 | |
| 1006 | if (nlmsg_attrlen(cb->nlh, hdrlen)) |
| 1007 | bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE); |
| 1008 | |
David S. Miller | d106352 | 2012-06-26 21:28:54 -0700 | [diff] [blame] | 1009 | return __inet_diag_dump(skb, cb, nlmsg_data(cb->nlh), bc); |
Pavel Emelyanov | 25c4cd2 | 2011-12-06 07:58:58 +0000 | [diff] [blame] | 1010 | } |
| 1011 | |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 1012 | static int inet_diag_type2proto(int type) |
Pavel Emelyanov | a029fe2 | 2011-12-06 07:59:32 +0000 | [diff] [blame] | 1013 | { |
| 1014 | switch (type) { |
| 1015 | case TCPDIAG_GETSOCK: |
| 1016 | return IPPROTO_TCP; |
| 1017 | case DCCPDIAG_GETSOCK: |
| 1018 | return IPPROTO_DCCP; |
| 1019 | default: |
| 1020 | return 0; |
| 1021 | } |
| 1022 | } |
| 1023 | |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 1024 | static int inet_diag_dump_compat(struct sk_buff *skb, |
| 1025 | struct netlink_callback *cb) |
Pavel Emelyanov | 25c4cd2 | 2011-12-06 07:58:58 +0000 | [diff] [blame] | 1026 | { |
David S. Miller | d106352 | 2012-06-26 21:28:54 -0700 | [diff] [blame] | 1027 | struct inet_diag_req *rc = nlmsg_data(cb->nlh); |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 1028 | int hdrlen = sizeof(struct inet_diag_req); |
Pavel Emelyanov | c899136 | 2012-01-10 22:36:35 +0000 | [diff] [blame] | 1029 | struct inet_diag_req_v2 req; |
Pavel Emelyanov | 25c4cd2 | 2011-12-06 07:58:58 +0000 | [diff] [blame] | 1030 | struct nlattr *bc = NULL; |
Pavel Emelyanov | 25c4cd2 | 2011-12-06 07:58:58 +0000 | [diff] [blame] | 1031 | |
Pavel Emelyanov | d23deaa | 2011-12-06 07:59:15 +0000 | [diff] [blame] | 1032 | req.sdiag_family = AF_UNSPEC; /* compatibility */ |
Pavel Emelyanov | 25c4cd2 | 2011-12-06 07:58:58 +0000 | [diff] [blame] | 1033 | req.sdiag_protocol = inet_diag_type2proto(cb->nlh->nlmsg_type); |
| 1034 | req.idiag_ext = rc->idiag_ext; |
| 1035 | req.idiag_states = rc->idiag_states; |
| 1036 | req.id = rc->id; |
| 1037 | |
| 1038 | if (nlmsg_attrlen(cb->nlh, hdrlen)) |
| 1039 | bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE); |
| 1040 | |
| 1041 | return __inet_diag_dump(skb, cb, &req, bc); |
| 1042 | } |
| 1043 | |
Pavel Emelyanov | fe50ce2 | 2011-12-06 07:58:39 +0000 | [diff] [blame] | 1044 | static int inet_diag_get_exact_compat(struct sk_buff *in_skb, |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 1045 | const struct nlmsghdr *nlh) |
Pavel Emelyanov | fe50ce2 | 2011-12-06 07:58:39 +0000 | [diff] [blame] | 1046 | { |
David S. Miller | d106352 | 2012-06-26 21:28:54 -0700 | [diff] [blame] | 1047 | struct inet_diag_req *rc = nlmsg_data(nlh); |
Pavel Emelyanov | c899136 | 2012-01-10 22:36:35 +0000 | [diff] [blame] | 1048 | struct inet_diag_req_v2 req; |
Pavel Emelyanov | fe50ce2 | 2011-12-06 07:58:39 +0000 | [diff] [blame] | 1049 | |
| 1050 | req.sdiag_family = rc->idiag_family; |
| 1051 | req.sdiag_protocol = inet_diag_type2proto(nlh->nlmsg_type); |
| 1052 | req.idiag_ext = rc->idiag_ext; |
| 1053 | req.idiag_states = rc->idiag_states; |
| 1054 | req.id = rc->id; |
| 1055 | |
| 1056 | return inet_diag_get_exact(in_skb, nlh, &req); |
| 1057 | } |
| 1058 | |
Pavel Emelyanov | 8d34172 | 2011-12-06 07:57:06 +0000 | [diff] [blame] | 1059 | static int inet_diag_rcv_msg_compat(struct sk_buff *skb, struct nlmsghdr *nlh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1060 | { |
Pavel Emelyanov | 3b09c84 | 2012-01-10 22:37:26 +0000 | [diff] [blame] | 1061 | int hdrlen = sizeof(struct inet_diag_req); |
Andrey Vagin | 51d7ccc | 2012-07-16 04:28:49 +0000 | [diff] [blame] | 1062 | struct net *net = sock_net(skb->sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1063 | |
Thomas Graf | ead592b | 2007-03-22 23:30:35 -0700 | [diff] [blame] | 1064 | if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX || |
| 1065 | nlmsg_len(nlh) < hdrlen) |
| 1066 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | |
David S. Miller | b8f3ab4 | 2011-01-18 12:40:38 -0800 | [diff] [blame] | 1068 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
Thomas Graf | ead592b | 2007-03-22 23:30:35 -0700 | [diff] [blame] | 1069 | if (nlmsg_attrlen(nlh, hdrlen)) { |
| 1070 | struct nlattr *attr; |
| 1071 | |
| 1072 | attr = nlmsg_find_attr(nlh, hdrlen, |
| 1073 | INET_DIAG_REQ_BYTECODE); |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 1074 | if (!attr || |
Thomas Graf | ead592b | 2007-03-22 23:30:35 -0700 | [diff] [blame] | 1075 | nla_len(attr) < sizeof(struct inet_diag_bc_op) || |
| 1076 | inet_diag_bc_audit(nla_data(attr), nla_len(attr))) |
| 1077 | return -EINVAL; |
| 1078 | } |
Pablo Neira Ayuso | 80d326f | 2012-02-24 14:30:15 +0000 | [diff] [blame] | 1079 | { |
| 1080 | struct netlink_dump_control c = { |
| 1081 | .dump = inet_diag_dump_compat, |
| 1082 | }; |
Andrey Vagin | 51d7ccc | 2012-07-16 04:28:49 +0000 | [diff] [blame] | 1083 | return netlink_dump_start(net->diag_nlsk, skb, nlh, &c); |
Pablo Neira Ayuso | 80d326f | 2012-02-24 14:30:15 +0000 | [diff] [blame] | 1084 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1085 | } |
Thomas Graf | ead592b | 2007-03-22 23:30:35 -0700 | [diff] [blame] | 1086 | |
Pavel Emelyanov | fe50ce2 | 2011-12-06 07:58:39 +0000 | [diff] [blame] | 1087 | return inet_diag_get_exact_compat(skb, nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | } |
| 1089 | |
Pavel Emelyanov | d366477 | 2011-12-06 07:58:03 +0000 | [diff] [blame] | 1090 | static int inet_diag_handler_dump(struct sk_buff *skb, struct nlmsghdr *h) |
| 1091 | { |
Pavel Emelyanov | c899136 | 2012-01-10 22:36:35 +0000 | [diff] [blame] | 1092 | int hdrlen = sizeof(struct inet_diag_req_v2); |
Andrey Vagin | 51d7ccc | 2012-07-16 04:28:49 +0000 | [diff] [blame] | 1093 | struct net *net = sock_net(skb->sk); |
Pavel Emelyanov | d366477 | 2011-12-06 07:58:03 +0000 | [diff] [blame] | 1094 | |
| 1095 | if (nlmsg_len(h) < hdrlen) |
| 1096 | return -EINVAL; |
| 1097 | |
| 1098 | if (h->nlmsg_flags & NLM_F_DUMP) { |
Pavel Emelyanov | 25c4cd2 | 2011-12-06 07:58:58 +0000 | [diff] [blame] | 1099 | if (nlmsg_attrlen(h, hdrlen)) { |
| 1100 | struct nlattr *attr; |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 1101 | |
Pavel Emelyanov | 25c4cd2 | 2011-12-06 07:58:58 +0000 | [diff] [blame] | 1102 | attr = nlmsg_find_attr(h, hdrlen, |
| 1103 | INET_DIAG_REQ_BYTECODE); |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 1104 | if (!attr || |
Pavel Emelyanov | 25c4cd2 | 2011-12-06 07:58:58 +0000 | [diff] [blame] | 1105 | nla_len(attr) < sizeof(struct inet_diag_bc_op) || |
| 1106 | inet_diag_bc_audit(nla_data(attr), nla_len(attr))) |
| 1107 | return -EINVAL; |
| 1108 | } |
Pablo Neira Ayuso | 80d326f | 2012-02-24 14:30:15 +0000 | [diff] [blame] | 1109 | { |
| 1110 | struct netlink_dump_control c = { |
| 1111 | .dump = inet_diag_dump, |
| 1112 | }; |
Andrey Vagin | 51d7ccc | 2012-07-16 04:28:49 +0000 | [diff] [blame] | 1113 | return netlink_dump_start(net->diag_nlsk, skb, h, &c); |
Pablo Neira Ayuso | 80d326f | 2012-02-24 14:30:15 +0000 | [diff] [blame] | 1114 | } |
Pavel Emelyanov | d366477 | 2011-12-06 07:58:03 +0000 | [diff] [blame] | 1115 | } |
| 1116 | |
David S. Miller | d106352 | 2012-06-26 21:28:54 -0700 | [diff] [blame] | 1117 | return inet_diag_get_exact(skb, h, nlmsg_data(h)); |
Pavel Emelyanov | d366477 | 2011-12-06 07:58:03 +0000 | [diff] [blame] | 1118 | } |
| 1119 | |
Shan Wei | 8dcf01f | 2012-04-24 18:21:07 +0000 | [diff] [blame] | 1120 | static const struct sock_diag_handler inet_diag_handler = { |
Pavel Emelyanov | d366477 | 2011-12-06 07:58:03 +0000 | [diff] [blame] | 1121 | .family = AF_INET, |
| 1122 | .dump = inet_diag_handler_dump, |
| 1123 | }; |
| 1124 | |
Shan Wei | 8dcf01f | 2012-04-24 18:21:07 +0000 | [diff] [blame] | 1125 | static const struct sock_diag_handler inet6_diag_handler = { |
Pavel Emelyanov | d366477 | 2011-12-06 07:58:03 +0000 | [diff] [blame] | 1126 | .family = AF_INET6, |
| 1127 | .dump = inet_diag_handler_dump, |
| 1128 | }; |
| 1129 | |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 1130 | int inet_diag_register(const struct inet_diag_handler *h) |
| 1131 | { |
| 1132 | const __u16 type = h->idiag_type; |
| 1133 | int err = -EINVAL; |
| 1134 | |
Pavel Emelyanov | f13c95f | 2011-12-06 08:05:24 +0000 | [diff] [blame] | 1135 | if (type >= IPPROTO_MAX) |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 1136 | goto out; |
| 1137 | |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 1138 | mutex_lock(&inet_diag_table_mutex); |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 1139 | err = -EEXIST; |
Eric Dumazet | e31c5e0 | 2015-03-10 07:15:53 -0700 | [diff] [blame] | 1140 | if (!inet_diag_table[type]) { |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 1141 | inet_diag_table[type] = h; |
| 1142 | err = 0; |
| 1143 | } |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 1144 | mutex_unlock(&inet_diag_table_mutex); |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 1145 | out: |
| 1146 | return err; |
| 1147 | } |
| 1148 | EXPORT_SYMBOL_GPL(inet_diag_register); |
| 1149 | |
| 1150 | void inet_diag_unregister(const struct inet_diag_handler *h) |
| 1151 | { |
| 1152 | const __u16 type = h->idiag_type; |
| 1153 | |
Pavel Emelyanov | f13c95f | 2011-12-06 08:05:24 +0000 | [diff] [blame] | 1154 | if (type >= IPPROTO_MAX) |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 1155 | return; |
| 1156 | |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 1157 | mutex_lock(&inet_diag_table_mutex); |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 1158 | inet_diag_table[type] = NULL; |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 1159 | mutex_unlock(&inet_diag_table_mutex); |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 1160 | } |
| 1161 | EXPORT_SYMBOL_GPL(inet_diag_unregister); |
| 1162 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 1163 | static int __init inet_diag_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1164 | { |
Pavel Emelyanov | f13c95f | 2011-12-06 08:05:24 +0000 | [diff] [blame] | 1165 | const int inet_diag_table_size = (IPPROTO_MAX * |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 1166 | sizeof(struct inet_diag_handler *)); |
| 1167 | int err = -ENOMEM; |
| 1168 | |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 1169 | inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL); |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 1170 | if (!inet_diag_table) |
| 1171 | goto out; |
| 1172 | |
Pavel Emelyanov | d366477 | 2011-12-06 07:58:03 +0000 | [diff] [blame] | 1173 | err = sock_diag_register(&inet_diag_handler); |
| 1174 | if (err) |
| 1175 | goto out_free_nl; |
| 1176 | |
| 1177 | err = sock_diag_register(&inet6_diag_handler); |
| 1178 | if (err) |
| 1179 | goto out_free_inet; |
| 1180 | |
Pavel Emelyanov | 8ef874b | 2011-12-06 07:59:52 +0000 | [diff] [blame] | 1181 | sock_diag_register_inet_compat(inet_diag_rcv_msg_compat); |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 1182 | out: |
| 1183 | return err; |
Pavel Emelyanov | d366477 | 2011-12-06 07:58:03 +0000 | [diff] [blame] | 1184 | |
| 1185 | out_free_inet: |
| 1186 | sock_diag_unregister(&inet_diag_handler); |
| 1187 | out_free_nl: |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 1188 | kfree(inet_diag_table); |
| 1189 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1190 | } |
| 1191 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 1192 | static void __exit inet_diag_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1193 | { |
Pavel Emelyanov | d366477 | 2011-12-06 07:58:03 +0000 | [diff] [blame] | 1194 | sock_diag_unregister(&inet6_diag_handler); |
| 1195 | sock_diag_unregister(&inet_diag_handler); |
Pavel Emelyanov | 8ef874b | 2011-12-06 07:59:52 +0000 | [diff] [blame] | 1196 | sock_diag_unregister_inet_compat(inet_diag_rcv_msg_compat); |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 1197 | kfree(inet_diag_table); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1198 | } |
| 1199 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 1200 | module_init(inet_diag_init); |
| 1201 | module_exit(inet_diag_exit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1202 | MODULE_LICENSE("GPL"); |
Pavel Emelyanov | aec8dc6 | 2011-12-15 02:43:27 +0000 | [diff] [blame] | 1203 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2 /* AF_INET */); |
| 1204 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 10 /* AF_INET6 */); |