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 { |
Al Viro | 9f85529 | 2006-09-27 18:44:30 -0700 | [diff] [blame] | 41 | __be32 *saddr; |
| 42 | __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 | |
| 68 | static inline void inet_diag_unlock_handler( |
| 69 | const struct inet_diag_handler *handler) |
| 70 | { |
| 71 | mutex_unlock(&inet_diag_table_mutex); |
| 72 | } |
| 73 | |
Eric Dumazet | c8e2c80 | 2015-03-13 09:49:59 -0700 | [diff] [blame^] | 74 | static size_t inet_sk_attr_size(void) |
| 75 | { |
| 76 | return nla_total_size(sizeof(struct tcp_info)) |
| 77 | + nla_total_size(1) /* INET_DIAG_SHUTDOWN */ |
| 78 | + nla_total_size(1) /* INET_DIAG_TOS */ |
| 79 | + nla_total_size(1) /* INET_DIAG_TCLASS */ |
| 80 | + nla_total_size(sizeof(struct inet_diag_meminfo)) |
| 81 | + nla_total_size(sizeof(struct inet_diag_msg)) |
| 82 | + nla_total_size(SK_MEMINFO_VARS * sizeof(u32)) |
| 83 | + nla_total_size(TCP_CA_NAME_MAX) |
| 84 | + nla_total_size(sizeof(struct tcpvegas_info)) |
| 85 | + 64; |
| 86 | } |
| 87 | |
Pavel Emelyanov | 3c4d05c | 2011-12-09 06:23:00 +0000 | [diff] [blame] | 88 | int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk, |
Pavel Emelyanov | c899136 | 2012-01-10 22:36:35 +0000 | [diff] [blame] | 89 | struct sk_buff *skb, struct inet_diag_req_v2 *req, |
Eric W. Biederman | d06ca95 | 2012-05-24 17:58:08 -0600 | [diff] [blame] | 90 | struct user_namespace *user_ns, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 91 | u32 portid, u32 seq, u16 nlmsg_flags, |
Arnaldo Carvalho de Melo | dff2c03 | 2006-01-09 14:56:56 -0800 | [diff] [blame] | 92 | const struct nlmsghdr *unlh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | { |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 94 | const struct inet_sock *inet = inet_sk(sk); |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 95 | struct inet_diag_msg *r; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | struct nlmsghdr *nlh; |
Thomas Graf | 6e277ed | 2012-06-26 23:36:12 +0000 | [diff] [blame] | 97 | struct nlattr *attr; |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 98 | void *info = NULL; |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 99 | const struct inet_diag_handler *handler; |
Pavel Emelyanov | a029fe2 | 2011-12-06 07:59:32 +0000 | [diff] [blame] | 100 | int ext = req->idiag_ext; |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 101 | |
Pavel Emelyanov | a029fe2 | 2011-12-06 07:59:32 +0000 | [diff] [blame] | 102 | handler = inet_diag_table[req->sdiag_protocol]; |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 103 | BUG_ON(handler == NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 105 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), |
Thomas Graf | 6e277ed | 2012-06-26 23:36:12 +0000 | [diff] [blame] | 106 | nlmsg_flags); |
| 107 | if (!nlh) |
David S. Miller | d106352 | 2012-06-26 21:28:54 -0700 | [diff] [blame] | 108 | return -EMSGSIZE; |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 109 | |
David S. Miller | d106352 | 2012-06-26 21:28:54 -0700 | [diff] [blame] | 110 | r = nlmsg_data(nlh); |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 111 | BUG_ON(sk->sk_state == TCP_TIME_WAIT); |
Arnaldo Carvalho de Melo | 4e852c0 | 2006-01-09 14:56:19 -0800 | [diff] [blame] | 112 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 113 | r->idiag_family = sk->sk_family; |
| 114 | r->idiag_state = sk->sk_state; |
| 115 | r->idiag_timer = 0; |
| 116 | r->idiag_retrans = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 118 | r->id.idiag_if = sk->sk_bound_dev_if; |
Pavel Emelyanov | f65c1b5 | 2011-12-15 02:43:44 +0000 | [diff] [blame] | 119 | sock_diag_save_cookie(sk, r->id.idiag_cookie); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 121 | r->id.idiag_sport = inet->inet_sport; |
| 122 | r->id.idiag_dport = inet->inet_dport; |
Daniel Borkmann | b1aac81 | 2013-12-17 00:38:39 +0100 | [diff] [blame] | 123 | |
| 124 | memset(&r->id.idiag_src, 0, sizeof(r->id.idiag_src)); |
| 125 | memset(&r->id.idiag_dst, 0, sizeof(r->id.idiag_dst)); |
| 126 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 127 | r->id.idiag_src[0] = inet->inet_rcv_saddr; |
| 128 | r->id.idiag_dst[0] = inet->inet_daddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | |
Pavel Emelyanov | e4e541a | 2012-10-23 22:29:56 +0400 | [diff] [blame] | 130 | if (nla_put_u8(skb, INET_DIAG_SHUTDOWN, sk->sk_shutdown)) |
| 131 | goto errout; |
| 132 | |
Maciej Żenczykowski | 717b6d8 | 2011-11-22 16:03:10 -0500 | [diff] [blame] | 133 | /* IPv6 dual-stack sockets use inet->tos for IPv4 connections, |
| 134 | * hence this needs to be included regardless of socket family. |
| 135 | */ |
| 136 | if (ext & (1 << (INET_DIAG_TOS - 1))) |
Thomas Graf | 6e277ed | 2012-06-26 23:36:12 +0000 | [diff] [blame] | 137 | if (nla_put_u8(skb, INET_DIAG_TOS, inet->tos) < 0) |
| 138 | goto errout; |
Maciej Żenczykowski | 717b6d8 | 2011-11-22 16:03:10 -0500 | [diff] [blame] | 139 | |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 140 | #if IS_ENABLED(CONFIG_IPV6) |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 141 | if (r->idiag_family == AF_INET6) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | |
Eric Dumazet | efe4208 | 2013-10-03 15:42:29 -0700 | [diff] [blame] | 143 | *(struct in6_addr *)r->id.idiag_src = sk->sk_v6_rcv_saddr; |
| 144 | *(struct in6_addr *)r->id.idiag_dst = sk->sk_v6_daddr; |
Thomas Graf | 6e277ed | 2012-06-26 23:36:12 +0000 | [diff] [blame] | 145 | |
Maciej Żenczykowski | 06236ac | 2011-11-07 14:23:11 +0000 | [diff] [blame] | 146 | if (ext & (1 << (INET_DIAG_TCLASS - 1))) |
Eric Dumazet | efe4208 | 2013-10-03 15:42:29 -0700 | [diff] [blame] | 147 | if (nla_put_u8(skb, INET_DIAG_TCLASS, |
| 148 | inet6_sk(sk)->tclass) < 0) |
Thomas Graf | 6e277ed | 2012-06-26 23:36:12 +0000 | [diff] [blame] | 149 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | } |
| 151 | #endif |
| 152 | |
Eric W. Biederman | d06ca95 | 2012-05-24 17:58:08 -0600 | [diff] [blame] | 153 | r->idiag_uid = from_kuid_munged(user_ns, sock_i_uid(sk)); |
Pavel Emelyanov | 3c4d05c | 2011-12-09 06:23:00 +0000 | [diff] [blame] | 154 | r->idiag_inode = sock_i_ino(sk); |
| 155 | |
Thomas Graf | 6e277ed | 2012-06-26 23:36:12 +0000 | [diff] [blame] | 156 | if (ext & (1 << (INET_DIAG_MEMINFO - 1))) { |
| 157 | struct inet_diag_meminfo minfo = { |
| 158 | .idiag_rmem = sk_rmem_alloc_get(sk), |
| 159 | .idiag_wmem = sk->sk_wmem_queued, |
| 160 | .idiag_fmem = sk->sk_forward_alloc, |
| 161 | .idiag_tmem = sk_wmem_alloc_get(sk), |
| 162 | }; |
| 163 | |
| 164 | if (nla_put(skb, INET_DIAG_MEMINFO, sizeof(minfo), &minfo) < 0) |
| 165 | goto errout; |
Pavel Emelyanov | 3c4d05c | 2011-12-09 06:23:00 +0000 | [diff] [blame] | 166 | } |
| 167 | |
Pavel Emelyanov | c0636fa | 2011-12-30 00:53:32 +0000 | [diff] [blame] | 168 | if (ext & (1 << (INET_DIAG_SKMEMINFO - 1))) |
| 169 | if (sock_diag_put_meminfo(sk, skb, INET_DIAG_SKMEMINFO)) |
Thomas Graf | 6e277ed | 2012-06-26 23:36:12 +0000 | [diff] [blame] | 170 | goto errout; |
Pavel Emelyanov | c0636fa | 2011-12-30 00:53:32 +0000 | [diff] [blame] | 171 | |
Pavel Emelyanov | 3c4d05c | 2011-12-09 06:23:00 +0000 | [diff] [blame] | 172 | if (icsk == NULL) { |
Shan Wei | 62ad6fc | 2012-04-24 18:15:41 +0000 | [diff] [blame] | 173 | handler->idiag_get_info(sk, r, NULL); |
Pavel Emelyanov | 3c4d05c | 2011-12-09 06:23:00 +0000 | [diff] [blame] | 174 | goto out; |
| 175 | } |
| 176 | |
Ilpo Järvinen | 172589c | 2007-08-28 15:50:33 -0700 | [diff] [blame] | 177 | #define EXPIRES_IN_MS(tmo) DIV_ROUND_UP((tmo - jiffies) * 1000, HZ) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | |
Nandita Dukkipati | 6ba8a3b | 2013-03-11 10:00:43 +0000 | [diff] [blame] | 179 | if (icsk->icsk_pending == ICSK_TIME_RETRANS || |
| 180 | icsk->icsk_pending == ICSK_TIME_EARLY_RETRANS || |
| 181 | icsk->icsk_pending == ICSK_TIME_LOSS_PROBE) { |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 182 | r->idiag_timer = 1; |
| 183 | r->idiag_retrans = icsk->icsk_retransmits; |
| 184 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 185 | } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) { |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 186 | r->idiag_timer = 4; |
| 187 | r->idiag_retrans = icsk->icsk_probes_out; |
| 188 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | } else if (timer_pending(&sk->sk_timer)) { |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 190 | r->idiag_timer = 2; |
| 191 | r->idiag_retrans = icsk->icsk_probes_out; |
| 192 | r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | } else { |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 194 | r->idiag_timer = 0; |
| 195 | r->idiag_expires = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | } |
| 197 | #undef EXPIRES_IN_MS |
Arnaldo Carvalho de Melo | 540722f | 2005-08-10 05:54:28 -0300 | [diff] [blame] | 198 | |
Thomas Graf | 6e277ed | 2012-06-26 23:36:12 +0000 | [diff] [blame] | 199 | if (ext & (1 << (INET_DIAG_INFO - 1))) { |
| 200 | attr = nla_reserve(skb, INET_DIAG_INFO, |
| 201 | sizeof(struct tcp_info)); |
| 202 | if (!attr) |
| 203 | goto errout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | |
Thomas Graf | 6e277ed | 2012-06-26 23:36:12 +0000 | [diff] [blame] | 205 | info = nla_data(attr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | } |
| 207 | |
Thomas Graf | 6e277ed | 2012-06-26 23:36:12 +0000 | [diff] [blame] | 208 | if ((ext & (1 << (INET_DIAG_CONG - 1))) && icsk->icsk_ca_ops) |
| 209 | if (nla_put_string(skb, INET_DIAG_CONG, |
| 210 | icsk->icsk_ca_ops->name) < 0) |
| 211 | goto errout; |
| 212 | |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 213 | handler->idiag_get_info(sk, r, info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | |
Arnaldo Carvalho de Melo | 6687e98 | 2005-08-10 04:03:31 -0300 | [diff] [blame] | 215 | if (sk->sk_state < TCP_TIME_WAIT && |
| 216 | icsk->icsk_ca_ops && icsk->icsk_ca_ops->get_info) |
| 217 | icsk->icsk_ca_ops->get_info(sk, ext, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | |
Pavel Emelyanov | 3c4d05c | 2011-12-09 06:23:00 +0000 | [diff] [blame] | 219 | out: |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 220 | nlmsg_end(skb, nlh); |
| 221 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | |
Thomas Graf | 6e277ed | 2012-06-26 23:36:12 +0000 | [diff] [blame] | 223 | errout: |
| 224 | nlmsg_cancel(skb, nlh); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 225 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | } |
Pavel Emelyanov | 3c4d05c | 2011-12-09 06:23:00 +0000 | [diff] [blame] | 227 | EXPORT_SYMBOL_GPL(inet_sk_diag_fill); |
| 228 | |
| 229 | static int inet_csk_diag_fill(struct sock *sk, |
Pavel Emelyanov | c899136 | 2012-01-10 22:36:35 +0000 | [diff] [blame] | 230 | struct sk_buff *skb, struct inet_diag_req_v2 *req, |
Eric W. Biederman | d06ca95 | 2012-05-24 17:58:08 -0600 | [diff] [blame] | 231 | struct user_namespace *user_ns, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 232 | u32 portid, u32 seq, u16 nlmsg_flags, |
Pavel Emelyanov | 3c4d05c | 2011-12-09 06:23:00 +0000 | [diff] [blame] | 233 | const struct nlmsghdr *unlh) |
| 234 | { |
| 235 | return inet_sk_diag_fill(sk, inet_csk(sk), |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 236 | skb, req, user_ns, portid, seq, nlmsg_flags, unlh); |
Pavel Emelyanov | 3c4d05c | 2011-12-09 06:23:00 +0000 | [diff] [blame] | 237 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 239 | static int inet_twsk_diag_fill(struct inet_timewait_sock *tw, |
Pavel Emelyanov | c899136 | 2012-01-10 22:36:35 +0000 | [diff] [blame] | 240 | struct sk_buff *skb, struct inet_diag_req_v2 *req, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 241 | u32 portid, u32 seq, u16 nlmsg_flags, |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 242 | const struct nlmsghdr *unlh) |
| 243 | { |
Eric Dumazet | 96f817f | 2013-10-03 14:27:25 -0700 | [diff] [blame] | 244 | s32 tmo; |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 245 | struct inet_diag_msg *r; |
Thomas Graf | 6e277ed | 2012-06-26 23:36:12 +0000 | [diff] [blame] | 246 | struct nlmsghdr *nlh; |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 247 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 248 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), |
Thomas Graf | 6e277ed | 2012-06-26 23:36:12 +0000 | [diff] [blame] | 249 | nlmsg_flags); |
| 250 | if (!nlh) |
David S. Miller | d106352 | 2012-06-26 21:28:54 -0700 | [diff] [blame] | 251 | return -EMSGSIZE; |
David S. Miller | d106352 | 2012-06-26 21:28:54 -0700 | [diff] [blame] | 252 | |
| 253 | r = nlmsg_data(nlh); |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 254 | BUG_ON(tw->tw_state != TCP_TIME_WAIT); |
| 255 | |
Eric Dumazet | 96f817f | 2013-10-03 14:27:25 -0700 | [diff] [blame] | 256 | tmo = tw->tw_ttd - inet_tw_time_stamp(); |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 257 | if (tmo < 0) |
| 258 | tmo = 0; |
| 259 | |
| 260 | r->idiag_family = tw->tw_family; |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 261 | r->idiag_retrans = 0; |
Daniel Borkmann | b1aac81 | 2013-12-17 00:38:39 +0100 | [diff] [blame] | 262 | |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 263 | r->id.idiag_if = tw->tw_bound_dev_if; |
Pavel Emelyanov | f65c1b5 | 2011-12-15 02:43:44 +0000 | [diff] [blame] | 264 | sock_diag_save_cookie(tw, r->id.idiag_cookie); |
Daniel Borkmann | b1aac81 | 2013-12-17 00:38:39 +0100 | [diff] [blame] | 265 | |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 266 | r->id.idiag_sport = tw->tw_sport; |
| 267 | r->id.idiag_dport = tw->tw_dport; |
Daniel Borkmann | b1aac81 | 2013-12-17 00:38:39 +0100 | [diff] [blame] | 268 | |
| 269 | memset(&r->id.idiag_src, 0, sizeof(r->id.idiag_src)); |
| 270 | memset(&r->id.idiag_dst, 0, sizeof(r->id.idiag_dst)); |
| 271 | |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 272 | r->id.idiag_src[0] = tw->tw_rcv_saddr; |
| 273 | r->id.idiag_dst[0] = tw->tw_daddr; |
Daniel Borkmann | b1aac81 | 2013-12-17 00:38:39 +0100 | [diff] [blame] | 274 | |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 275 | r->idiag_state = tw->tw_substate; |
| 276 | r->idiag_timer = 3; |
Eric Dumazet | 96f817f | 2013-10-03 14:27:25 -0700 | [diff] [blame] | 277 | r->idiag_expires = jiffies_to_msecs(tmo); |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 278 | r->idiag_rqueue = 0; |
| 279 | r->idiag_wqueue = 0; |
| 280 | r->idiag_uid = 0; |
| 281 | r->idiag_inode = 0; |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 282 | #if IS_ENABLED(CONFIG_IPV6) |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 283 | if (tw->tw_family == AF_INET6) { |
Eric Dumazet | efe4208 | 2013-10-03 15:42:29 -0700 | [diff] [blame] | 284 | *(struct in6_addr *)r->id.idiag_src = tw->tw_v6_rcv_saddr; |
| 285 | *(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] | 286 | } |
| 287 | #endif |
Thomas Graf | 6e277ed | 2012-06-26 23:36:12 +0000 | [diff] [blame] | 288 | |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 289 | nlmsg_end(skb, nlh); |
| 290 | return 0; |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 291 | } |
| 292 | |
Arnaldo Carvalho de Melo | dff2c03 | 2006-01-09 14:56:56 -0800 | [diff] [blame] | 293 | static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, |
Eric W. Biederman | d06ca95 | 2012-05-24 17:58:08 -0600 | [diff] [blame] | 294 | struct inet_diag_req_v2 *r, |
| 295 | struct user_namespace *user_ns, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 296 | u32 portid, u32 seq, u16 nlmsg_flags, |
Arnaldo Carvalho de Melo | dff2c03 | 2006-01-09 14:56:56 -0800 | [diff] [blame] | 297 | const struct nlmsghdr *unlh) |
| 298 | { |
| 299 | if (sk->sk_state == TCP_TIME_WAIT) |
Eric Dumazet | efe4208 | 2013-10-03 15:42:29 -0700 | [diff] [blame] | 300 | return inet_twsk_diag_fill(inet_twsk(sk), skb, r, portid, seq, |
| 301 | nlmsg_flags, unlh); |
| 302 | |
| 303 | return inet_csk_diag_fill(sk, skb, r, user_ns, portid, seq, |
| 304 | nlmsg_flags, unlh); |
Arnaldo Carvalho de Melo | dff2c03 | 2006-01-09 14:56:56 -0800 | [diff] [blame] | 305 | } |
| 306 | |
Pavel Emelyanov | 1942c51 | 2011-12-09 06:23:18 +0000 | [diff] [blame] | 307 | int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *in_skb, |
Pavel Emelyanov | c899136 | 2012-01-10 22:36:35 +0000 | [diff] [blame] | 308 | const struct nlmsghdr *nlh, struct inet_diag_req_v2 *req) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | { |
| 310 | int err; |
| 311 | struct sock *sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | struct sk_buff *rep; |
Andrey Vagin | 51d7ccc | 2012-07-16 04:28:49 +0000 | [diff] [blame] | 313 | struct net *net = sock_net(in_skb->sk); |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 314 | |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 315 | err = -EINVAL; |
Pavel Emelyanov | fe50ce2 | 2011-12-06 07:58:39 +0000 | [diff] [blame] | 316 | if (req->sdiag_family == AF_INET) { |
Andrey Vagin | 51d7ccc | 2012-07-16 04:28:49 +0000 | [diff] [blame] | 317 | sk = inet_lookup(net, hashinfo, req->id.idiag_dst[0], |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 318 | req->id.idiag_dport, req->id.idiag_src[0], |
| 319 | req->id.idiag_sport, req->id.idiag_if); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | } |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 321 | #if IS_ENABLED(CONFIG_IPV6) |
Pavel Emelyanov | fe50ce2 | 2011-12-06 07:58:39 +0000 | [diff] [blame] | 322 | else if (req->sdiag_family == AF_INET6) { |
Andrey Vagin | 51d7ccc | 2012-07-16 04:28:49 +0000 | [diff] [blame] | 323 | sk = inet6_lookup(net, hashinfo, |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 324 | (struct in6_addr *)req->id.idiag_dst, |
| 325 | req->id.idiag_dport, |
| 326 | (struct in6_addr *)req->id.idiag_src, |
| 327 | req->id.idiag_sport, |
| 328 | req->id.idiag_if); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | } |
| 330 | #endif |
| 331 | else { |
Pavel Emelyanov | 476f7db | 2011-12-09 06:22:10 +0000 | [diff] [blame] | 332 | goto out_nosk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | } |
| 334 | |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 335 | err = -ENOENT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | if (sk == NULL) |
Pavel Emelyanov | 476f7db | 2011-12-09 06:22:10 +0000 | [diff] [blame] | 337 | goto out_nosk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | |
Pavel Emelyanov | f65c1b5 | 2011-12-15 02:43:44 +0000 | [diff] [blame] | 339 | err = sock_diag_check_cookie(sk, req->id.idiag_cookie); |
Pavel Emelyanov | b005ab4 | 2011-12-09 06:21:53 +0000 | [diff] [blame] | 340 | if (err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | goto out; |
| 342 | |
Eric Dumazet | c8e2c80 | 2015-03-13 09:49:59 -0700 | [diff] [blame^] | 343 | rep = nlmsg_new(inet_sk_attr_size(), GFP_KERNEL); |
Thomas Graf | 6e277ed | 2012-06-26 23:36:12 +0000 | [diff] [blame] | 344 | if (!rep) { |
| 345 | err = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | goto out; |
Thomas Graf | 6e277ed | 2012-06-26 23:36:12 +0000 | [diff] [blame] | 347 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | |
Pavel Emelyanov | a029fe2 | 2011-12-06 07:59:32 +0000 | [diff] [blame] | 349 | err = sk_diag_fill(sk, rep, req, |
Patrick McHardy | e32123e | 2013-04-17 06:46:57 +0000 | [diff] [blame] | 350 | sk_user_ns(NETLINK_CB(in_skb).sk), |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 351 | NETLINK_CB(in_skb).portid, |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 352 | nlh->nlmsg_seq, 0, nlh); |
| 353 | if (err < 0) { |
| 354 | WARN_ON(err == -EMSGSIZE); |
Thomas Graf | 6e277ed | 2012-06-26 23:36:12 +0000 | [diff] [blame] | 355 | nlmsg_free(rep); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 356 | goto out; |
| 357 | } |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 358 | 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] | 359 | MSG_DONTWAIT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | if (err > 0) |
| 361 | err = 0; |
| 362 | |
| 363 | out: |
Eric Dumazet | c1d607c | 2013-10-11 08:54:49 -0700 | [diff] [blame] | 364 | if (sk) |
| 365 | sock_gen_put(sk); |
| 366 | |
Pavel Emelyanov | 476f7db | 2011-12-09 06:22:10 +0000 | [diff] [blame] | 367 | out_nosk: |
| 368 | return err; |
| 369 | } |
Pavel Emelyanov | 1942c51 | 2011-12-09 06:23:18 +0000 | [diff] [blame] | 370 | EXPORT_SYMBOL_GPL(inet_diag_dump_one_icsk); |
Pavel Emelyanov | 476f7db | 2011-12-09 06:22:10 +0000 | [diff] [blame] | 371 | |
| 372 | static int inet_diag_get_exact(struct sk_buff *in_skb, |
| 373 | const struct nlmsghdr *nlh, |
Pavel Emelyanov | c899136 | 2012-01-10 22:36:35 +0000 | [diff] [blame] | 374 | struct inet_diag_req_v2 *req) |
Pavel Emelyanov | 476f7db | 2011-12-09 06:22:10 +0000 | [diff] [blame] | 375 | { |
| 376 | const struct inet_diag_handler *handler; |
| 377 | int err; |
| 378 | |
| 379 | handler = inet_diag_lock_handler(req->sdiag_protocol); |
| 380 | if (IS_ERR(handler)) |
| 381 | err = PTR_ERR(handler); |
| 382 | else |
Pavel Emelyanov | 1942c51 | 2011-12-09 06:23:18 +0000 | [diff] [blame] | 383 | err = handler->dump_one(in_skb, nlh, req); |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 384 | inet_diag_unlock_handler(handler); |
Pavel Emelyanov | 476f7db | 2011-12-09 06:22:10 +0000 | [diff] [blame] | 385 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | return err; |
| 387 | } |
| 388 | |
Al Viro | 9f85529 | 2006-09-27 18:44:30 -0700 | [diff] [blame] | 389 | static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | { |
| 391 | int words = bits >> 5; |
| 392 | |
| 393 | bits &= 0x1f; |
| 394 | |
| 395 | if (words) { |
| 396 | if (memcmp(a1, a2, words << 2)) |
| 397 | return 0; |
| 398 | } |
| 399 | if (bits) { |
Al Viro | 9f85529 | 2006-09-27 18:44:30 -0700 | [diff] [blame] | 400 | __be32 w1, w2; |
| 401 | __be32 mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | |
| 403 | w1 = a1[words]; |
| 404 | w2 = a2[words]; |
| 405 | |
| 406 | mask = htonl((0xffffffff) << (32 - bits)); |
| 407 | |
| 408 | if ((w1 ^ w2) & mask) |
| 409 | return 0; |
| 410 | } |
| 411 | |
| 412 | return 1; |
| 413 | } |
| 414 | |
| 415 | |
Pavel Emelyanov | 87c22ea | 2011-12-09 06:21:34 +0000 | [diff] [blame] | 416 | static int inet_diag_bc_run(const struct nlattr *_bc, |
| 417 | const struct inet_diag_entry *entry) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | { |
Pavel Emelyanov | 87c22ea | 2011-12-09 06:21:34 +0000 | [diff] [blame] | 419 | const void *bc = nla_data(_bc); |
| 420 | int len = nla_len(_bc); |
| 421 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | while (len > 0) { |
| 423 | int yes = 1; |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 424 | const struct inet_diag_bc_op *op = bc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | |
| 426 | switch (op->code) { |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 427 | case INET_DIAG_BC_NOP: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | break; |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 429 | case INET_DIAG_BC_JMP: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | yes = 0; |
| 431 | break; |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 432 | case INET_DIAG_BC_S_GE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | yes = entry->sport >= op[1].no; |
| 434 | break; |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 435 | case INET_DIAG_BC_S_LE: |
Roel Kluin | b4ced2b | 2010-01-19 14:12:20 -0800 | [diff] [blame] | 436 | yes = entry->sport <= op[1].no; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | break; |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 438 | case INET_DIAG_BC_D_GE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | yes = entry->dport >= op[1].no; |
| 440 | break; |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 441 | case INET_DIAG_BC_D_LE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | yes = entry->dport <= op[1].no; |
| 443 | break; |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 444 | case INET_DIAG_BC_AUTO: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | yes = !(entry->userlocks & SOCK_BINDPORT_LOCK); |
| 446 | break; |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 447 | case INET_DIAG_BC_S_COND: |
Arnaldo Carvalho de Melo | a8c2190 | 2005-08-12 12:56:38 -0300 | [diff] [blame] | 448 | case INET_DIAG_BC_D_COND: { |
| 449 | struct inet_diag_hostcond *cond; |
Al Viro | 9f85529 | 2006-09-27 18:44:30 -0700 | [diff] [blame] | 450 | __be32 *addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | |
Arnaldo Carvalho de Melo | a8c2190 | 2005-08-12 12:56:38 -0300 | [diff] [blame] | 452 | cond = (struct inet_diag_hostcond *)(op + 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | if (cond->port != -1 && |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 454 | cond->port != (op->code == INET_DIAG_BC_S_COND ? |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | entry->sport : entry->dport)) { |
| 456 | yes = 0; |
| 457 | break; |
| 458 | } |
Arnaldo Carvalho de Melo | 4e852c0 | 2006-01-09 14:56:19 -0800 | [diff] [blame] | 459 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 460 | if (op->code == INET_DIAG_BC_S_COND) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | addr = entry->saddr; |
| 462 | else |
| 463 | addr = entry->daddr; |
| 464 | |
Neal Cardwell | f67caec | 2012-12-08 19:43:23 +0000 | [diff] [blame] | 465 | if (cond->family != AF_UNSPEC && |
| 466 | cond->family != entry->family) { |
| 467 | if (entry->family == AF_INET6 && |
| 468 | cond->family == AF_INET) { |
| 469 | if (addr[0] == 0 && addr[1] == 0 && |
| 470 | addr[2] == htonl(0xffff) && |
| 471 | bitstring_match(addr + 3, |
| 472 | cond->addr, |
| 473 | cond->prefix_len)) |
| 474 | break; |
| 475 | } |
| 476 | yes = 0; |
| 477 | break; |
| 478 | } |
| 479 | |
| 480 | if (cond->prefix_len == 0) |
| 481 | break; |
Arnaldo Carvalho de Melo | 4e852c0 | 2006-01-09 14:56:19 -0800 | [diff] [blame] | 482 | if (bitstring_match(addr, cond->addr, |
| 483 | cond->prefix_len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | yes = 0; |
| 486 | break; |
| 487 | } |
| 488 | } |
| 489 | |
Arnaldo Carvalho de Melo | 4e852c0 | 2006-01-09 14:56:19 -0800 | [diff] [blame] | 490 | if (yes) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | len -= op->yes; |
| 492 | bc += op->yes; |
| 493 | } else { |
| 494 | len -= op->no; |
| 495 | bc += op->no; |
| 496 | } |
| 497 | } |
Eric Dumazet | a02cec2 | 2010-09-22 20:43:57 +0000 | [diff] [blame] | 498 | return len == 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | } |
| 500 | |
Pavel Emelyanov | 8d07d15 | 2011-12-09 06:22:44 +0000 | [diff] [blame] | 501 | int inet_diag_bc_sk(const struct nlattr *bc, struct sock *sk) |
| 502 | { |
| 503 | struct inet_diag_entry entry; |
| 504 | struct inet_sock *inet = inet_sk(sk); |
| 505 | |
| 506 | if (bc == NULL) |
| 507 | return 1; |
| 508 | |
| 509 | entry.family = sk->sk_family; |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 510 | #if IS_ENABLED(CONFIG_IPV6) |
Pavel Emelyanov | 8d07d15 | 2011-12-09 06:22:44 +0000 | [diff] [blame] | 511 | if (entry.family == AF_INET6) { |
Pavel Emelyanov | 8d07d15 | 2011-12-09 06:22:44 +0000 | [diff] [blame] | 512 | |
Eric Dumazet | efe4208 | 2013-10-03 15:42:29 -0700 | [diff] [blame] | 513 | entry.saddr = sk->sk_v6_rcv_saddr.s6_addr32; |
| 514 | entry.daddr = sk->sk_v6_daddr.s6_addr32; |
Pavel Emelyanov | 8d07d15 | 2011-12-09 06:22:44 +0000 | [diff] [blame] | 515 | } else |
| 516 | #endif |
| 517 | { |
| 518 | entry.saddr = &inet->inet_rcv_saddr; |
| 519 | entry.daddr = &inet->inet_daddr; |
| 520 | } |
| 521 | entry.sport = inet->inet_num; |
| 522 | entry.dport = ntohs(inet->inet_dport); |
| 523 | entry.userlocks = sk->sk_userlocks; |
| 524 | |
| 525 | return inet_diag_bc_run(bc, &entry); |
| 526 | } |
| 527 | EXPORT_SYMBOL_GPL(inet_diag_bc_sk); |
| 528 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | static int valid_cc(const void *bc, int len, int cc) |
| 530 | { |
| 531 | while (len >= 0) { |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 532 | const struct inet_diag_bc_op *op = bc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | |
| 534 | if (cc > len) |
| 535 | return 0; |
| 536 | if (cc == len) |
| 537 | return 1; |
Eric Dumazet | eeb1497 | 2011-06-17 16:25:39 -0400 | [diff] [blame] | 538 | if (op->yes < 4 || op->yes & 3) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | return 0; |
| 540 | len -= op->yes; |
| 541 | bc += op->yes; |
| 542 | } |
| 543 | return 0; |
| 544 | } |
| 545 | |
Neal Cardwell | 405c005 | 2012-12-08 19:43:22 +0000 | [diff] [blame] | 546 | /* Validate an inet_diag_hostcond. */ |
| 547 | static bool valid_hostcond(const struct inet_diag_bc_op *op, int len, |
| 548 | int *min_len) |
| 549 | { |
| 550 | int addr_len; |
| 551 | struct inet_diag_hostcond *cond; |
| 552 | |
| 553 | /* Check hostcond space. */ |
| 554 | *min_len += sizeof(struct inet_diag_hostcond); |
| 555 | if (len < *min_len) |
| 556 | return false; |
| 557 | cond = (struct inet_diag_hostcond *)(op + 1); |
| 558 | |
| 559 | /* Check address family and address length. */ |
| 560 | switch (cond->family) { |
| 561 | case AF_UNSPEC: |
| 562 | addr_len = 0; |
| 563 | break; |
| 564 | case AF_INET: |
| 565 | addr_len = sizeof(struct in_addr); |
| 566 | break; |
| 567 | case AF_INET6: |
| 568 | addr_len = sizeof(struct in6_addr); |
| 569 | break; |
| 570 | default: |
| 571 | return false; |
| 572 | } |
| 573 | *min_len += addr_len; |
| 574 | if (len < *min_len) |
| 575 | return false; |
| 576 | |
| 577 | /* Check prefix length (in bits) vs address length (in bytes). */ |
| 578 | if (cond->prefix_len > 8 * addr_len) |
| 579 | return false; |
| 580 | |
| 581 | return true; |
| 582 | } |
| 583 | |
Neal Cardwell | 5e1f542 | 2012-12-09 11:09:54 +0000 | [diff] [blame] | 584 | /* Validate a port comparison operator. */ |
| 585 | static inline bool valid_port_comparison(const struct inet_diag_bc_op *op, |
| 586 | int len, int *min_len) |
| 587 | { |
| 588 | /* Port comparisons put the port in a follow-on inet_diag_bc_op. */ |
| 589 | *min_len += sizeof(struct inet_diag_bc_op); |
| 590 | if (len < *min_len) |
| 591 | return false; |
| 592 | return true; |
| 593 | } |
| 594 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 595 | static int inet_diag_bc_audit(const void *bytecode, int bytecode_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | { |
Eric Dumazet | eeb1497 | 2011-06-17 16:25:39 -0400 | [diff] [blame] | 597 | const void *bc = bytecode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | int len = bytecode_len; |
| 599 | |
| 600 | while (len > 0) { |
Eric Dumazet | eeb1497 | 2011-06-17 16:25:39 -0400 | [diff] [blame] | 601 | const struct inet_diag_bc_op *op = bc; |
Neal Cardwell | 405c005 | 2012-12-08 19:43:22 +0000 | [diff] [blame] | 602 | int min_len = sizeof(struct inet_diag_bc_op); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | |
| 604 | //printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len); |
| 605 | switch (op->code) { |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 606 | case INET_DIAG_BC_S_COND: |
| 607 | case INET_DIAG_BC_D_COND: |
Neal Cardwell | 405c005 | 2012-12-08 19:43:22 +0000 | [diff] [blame] | 608 | if (!valid_hostcond(bc, len, &min_len)) |
| 609 | return -EINVAL; |
Neal Cardwell | 5e1f542 | 2012-12-09 11:09:54 +0000 | [diff] [blame] | 610 | break; |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 611 | case INET_DIAG_BC_S_GE: |
| 612 | case INET_DIAG_BC_S_LE: |
| 613 | case INET_DIAG_BC_D_GE: |
| 614 | case INET_DIAG_BC_D_LE: |
Neal Cardwell | 5e1f542 | 2012-12-09 11:09:54 +0000 | [diff] [blame] | 615 | if (!valid_port_comparison(bc, len, &min_len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | return -EINVAL; |
| 617 | break; |
Neal Cardwell | 5e1f542 | 2012-12-09 11:09:54 +0000 | [diff] [blame] | 618 | case INET_DIAG_BC_AUTO: |
| 619 | case INET_DIAG_BC_JMP: |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 620 | case INET_DIAG_BC_NOP: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 621 | break; |
| 622 | default: |
| 623 | return -EINVAL; |
| 624 | } |
Neal Cardwell | 5e1f542 | 2012-12-09 11:09:54 +0000 | [diff] [blame] | 625 | |
| 626 | if (op->code != INET_DIAG_BC_NOP) { |
| 627 | if (op->no < min_len || op->no > len + 4 || op->no & 3) |
| 628 | return -EINVAL; |
| 629 | if (op->no < len && |
| 630 | !valid_cc(bytecode, bytecode_len, len - op->no)) |
| 631 | return -EINVAL; |
| 632 | } |
| 633 | |
Neal Cardwell | 405c005 | 2012-12-08 19:43:22 +0000 | [diff] [blame] | 634 | if (op->yes < min_len || op->yes > len + 4 || op->yes & 3) |
Eric Dumazet | eeb1497 | 2011-06-17 16:25:39 -0400 | [diff] [blame] | 635 | return -EINVAL; |
Arnaldo Carvalho de Melo | 4e852c0 | 2006-01-09 14:56:19 -0800 | [diff] [blame] | 636 | bc += op->yes; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | len -= op->yes; |
| 638 | } |
| 639 | return len == 0 ? 0 : -EINVAL; |
| 640 | } |
| 641 | |
Arnaldo Carvalho de Melo | dff2c03 | 2006-01-09 14:56:56 -0800 | [diff] [blame] | 642 | static int inet_csk_diag_dump(struct sock *sk, |
| 643 | struct sk_buff *skb, |
Pavel Emelyanov | 37f352b | 2011-12-06 07:57:26 +0000 | [diff] [blame] | 644 | struct netlink_callback *cb, |
Pavel Emelyanov | c899136 | 2012-01-10 22:36:35 +0000 | [diff] [blame] | 645 | struct inet_diag_req_v2 *r, |
Pavel Emelyanov | 37f352b | 2011-12-06 07:57:26 +0000 | [diff] [blame] | 646 | const struct nlattr *bc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | { |
Pavel Emelyanov | 8d07d15 | 2011-12-09 06:22:44 +0000 | [diff] [blame] | 648 | if (!inet_diag_bc_sk(bc, sk)) |
| 649 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 650 | |
Pavel Emelyanov | a029fe2 | 2011-12-06 07:59:32 +0000 | [diff] [blame] | 651 | return inet_csk_diag_fill(sk, skb, r, |
Patrick McHardy | e32123e | 2013-04-17 06:46:57 +0000 | [diff] [blame] | 652 | sk_user_ns(NETLINK_CB(cb->skb).sk), |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 653 | NETLINK_CB(cb->skb).portid, |
Arnaldo Carvalho de Melo | dff2c03 | 2006-01-09 14:56:56 -0800 | [diff] [blame] | 654 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | } |
| 656 | |
Eric Dumazet | 05dbc7b | 2013-10-03 00:22:02 -0700 | [diff] [blame] | 657 | static int inet_twsk_diag_dump(struct sock *sk, |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 658 | struct sk_buff *skb, |
Pavel Emelyanov | 37f352b | 2011-12-06 07:57:26 +0000 | [diff] [blame] | 659 | struct netlink_callback *cb, |
Pavel Emelyanov | c899136 | 2012-01-10 22:36:35 +0000 | [diff] [blame] | 660 | struct inet_diag_req_v2 *r, |
Pavel Emelyanov | 37f352b | 2011-12-06 07:57:26 +0000 | [diff] [blame] | 661 | const struct nlattr *bc) |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 662 | { |
Eric Dumazet | 05dbc7b | 2013-10-03 00:22:02 -0700 | [diff] [blame] | 663 | struct inet_timewait_sock *tw = inet_twsk(sk); |
| 664 | |
Pavel Emelyanov | 37f352b | 2011-12-06 07:57:26 +0000 | [diff] [blame] | 665 | if (bc != NULL) { |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 666 | struct inet_diag_entry entry; |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 667 | |
| 668 | entry.family = tw->tw_family; |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 669 | #if IS_ENABLED(CONFIG_IPV6) |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 670 | if (tw->tw_family == AF_INET6) { |
Eric Dumazet | efe4208 | 2013-10-03 15:42:29 -0700 | [diff] [blame] | 671 | entry.saddr = tw->tw_v6_rcv_saddr.s6_addr32; |
| 672 | entry.daddr = tw->tw_v6_daddr.s6_addr32; |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 673 | } else |
| 674 | #endif |
| 675 | { |
| 676 | entry.saddr = &tw->tw_rcv_saddr; |
| 677 | entry.daddr = &tw->tw_daddr; |
| 678 | } |
| 679 | entry.sport = tw->tw_num; |
| 680 | entry.dport = ntohs(tw->tw_dport); |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 681 | entry.userlocks = 0; |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 682 | |
Pavel Emelyanov | 87c22ea | 2011-12-09 06:21:34 +0000 | [diff] [blame] | 683 | if (!inet_diag_bc_run(bc, &entry)) |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 684 | return 0; |
| 685 | } |
| 686 | |
Pavel Emelyanov | a029fe2 | 2011-12-06 07:59:32 +0000 | [diff] [blame] | 687 | return inet_twsk_diag_fill(tw, skb, r, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 688 | NETLINK_CB(cb->skb).portid, |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 689 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); |
| 690 | } |
| 691 | |
Neal Cardwell | 1c95df8 | 2012-12-08 19:43:21 +0000 | [diff] [blame] | 692 | /* Get the IPv4, IPv6, or IPv4-mapped-IPv6 local and remote addresses |
| 693 | * from a request_sock. For IPv4-mapped-IPv6 we must map IPv4 to IPv6. |
| 694 | */ |
| 695 | static inline void inet_diag_req_addrs(const struct sock *sk, |
| 696 | const struct request_sock *req, |
| 697 | struct inet_diag_entry *entry) |
| 698 | { |
| 699 | struct inet_request_sock *ireq = inet_rsk(req); |
| 700 | |
| 701 | #if IS_ENABLED(CONFIG_IPV6) |
| 702 | if (sk->sk_family == AF_INET6) { |
| 703 | if (req->rsk_ops->family == AF_INET6) { |
Eric Dumazet | 634fb979 | 2013-10-09 15:21:29 -0700 | [diff] [blame] | 704 | entry->saddr = ireq->ir_v6_loc_addr.s6_addr32; |
| 705 | entry->daddr = ireq->ir_v6_rmt_addr.s6_addr32; |
Neal Cardwell | 1c95df8 | 2012-12-08 19:43:21 +0000 | [diff] [blame] | 706 | } else if (req->rsk_ops->family == AF_INET) { |
Eric Dumazet | 634fb979 | 2013-10-09 15:21:29 -0700 | [diff] [blame] | 707 | ipv6_addr_set_v4mapped(ireq->ir_loc_addr, |
Neal Cardwell | 1c95df8 | 2012-12-08 19:43:21 +0000 | [diff] [blame] | 708 | &entry->saddr_storage); |
Eric Dumazet | 634fb979 | 2013-10-09 15:21:29 -0700 | [diff] [blame] | 709 | ipv6_addr_set_v4mapped(ireq->ir_rmt_addr, |
Neal Cardwell | 1c95df8 | 2012-12-08 19:43:21 +0000 | [diff] [blame] | 710 | &entry->daddr_storage); |
| 711 | entry->saddr = entry->saddr_storage.s6_addr32; |
| 712 | entry->daddr = entry->daddr_storage.s6_addr32; |
| 713 | } |
| 714 | } else |
| 715 | #endif |
| 716 | { |
Eric Dumazet | 634fb979 | 2013-10-09 15:21:29 -0700 | [diff] [blame] | 717 | entry->saddr = &ireq->ir_loc_addr; |
| 718 | entry->daddr = &ireq->ir_rmt_addr; |
Neal Cardwell | 1c95df8 | 2012-12-08 19:43:21 +0000 | [diff] [blame] | 719 | } |
| 720 | } |
| 721 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 722 | 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] | 723 | struct request_sock *req, |
| 724 | struct user_namespace *user_ns, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 725 | u32 portid, u32 seq, |
Arnaldo Carvalho de Melo | 4e852c0 | 2006-01-09 14:56:19 -0800 | [diff] [blame] | 726 | const struct nlmsghdr *unlh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | { |
Arnaldo Carvalho de Melo | 2e6599c | 2005-06-18 22:46:52 -0700 | [diff] [blame] | 728 | const struct inet_request_sock *ireq = inet_rsk(req); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 729 | struct inet_sock *inet = inet_sk(sk); |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 730 | struct inet_diag_msg *r; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | struct nlmsghdr *nlh; |
| 732 | long tmo; |
| 733 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 734 | nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r), |
Thomas Graf | 6e277ed | 2012-06-26 23:36:12 +0000 | [diff] [blame] | 735 | NLM_F_MULTI); |
| 736 | if (!nlh) |
| 737 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | |
Thomas Graf | 6e277ed | 2012-06-26 23:36:12 +0000 | [diff] [blame] | 739 | r = nlmsg_data(nlh); |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 740 | r->idiag_family = sk->sk_family; |
| 741 | r->idiag_state = TCP_SYN_RECV; |
| 742 | r->idiag_timer = 1; |
Eric Dumazet | e6c022a | 2012-10-27 23:16:46 +0000 | [diff] [blame] | 743 | r->idiag_retrans = req->num_retrans; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 745 | r->id.idiag_if = sk->sk_bound_dev_if; |
Pavel Emelyanov | f65c1b5 | 2011-12-15 02:43:44 +0000 | [diff] [blame] | 746 | sock_diag_save_cookie(req, r->id.idiag_cookie); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | |
| 748 | tmo = req->expires - jiffies; |
| 749 | if (tmo < 0) |
| 750 | tmo = 0; |
| 751 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 752 | r->id.idiag_sport = inet->inet_sport; |
Eric Dumazet | 634fb979 | 2013-10-09 15:21:29 -0700 | [diff] [blame] | 753 | r->id.idiag_dport = ireq->ir_rmt_port; |
Daniel Borkmann | b1aac81 | 2013-12-17 00:38:39 +0100 | [diff] [blame] | 754 | |
| 755 | memset(&r->id.idiag_src, 0, sizeof(r->id.idiag_src)); |
| 756 | memset(&r->id.idiag_dst, 0, sizeof(r->id.idiag_dst)); |
| 757 | |
Eric Dumazet | 634fb979 | 2013-10-09 15:21:29 -0700 | [diff] [blame] | 758 | r->id.idiag_src[0] = ireq->ir_loc_addr; |
| 759 | r->id.idiag_dst[0] = ireq->ir_rmt_addr; |
Daniel Borkmann | b1aac81 | 2013-12-17 00:38:39 +0100 | [diff] [blame] | 760 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 761 | r->idiag_expires = jiffies_to_msecs(tmo); |
| 762 | r->idiag_rqueue = 0; |
| 763 | r->idiag_wqueue = 0; |
Eric W. Biederman | d06ca95 | 2012-05-24 17:58:08 -0600 | [diff] [blame] | 764 | 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] | 765 | r->idiag_inode = 0; |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 766 | #if IS_ENABLED(CONFIG_IPV6) |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 767 | if (r->idiag_family == AF_INET6) { |
Neal Cardwell | 1c95df8 | 2012-12-08 19:43:21 +0000 | [diff] [blame] | 768 | struct inet_diag_entry entry; |
| 769 | inet_diag_req_addrs(sk, req, &entry); |
| 770 | memcpy(r->id.idiag_src, entry.saddr, sizeof(struct in6_addr)); |
| 771 | memcpy(r->id.idiag_dst, entry.daddr, sizeof(struct in6_addr)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | } |
| 773 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | |
Johannes Berg | 053c095 | 2015-01-16 22:09:00 +0100 | [diff] [blame] | 775 | nlmsg_end(skb, nlh); |
| 776 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | } |
| 778 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 779 | 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] | 780 | struct netlink_callback *cb, |
Pavel Emelyanov | c899136 | 2012-01-10 22:36:35 +0000 | [diff] [blame] | 781 | struct inet_diag_req_v2 *r, |
Pavel Emelyanov | 37f352b | 2011-12-06 07:57:26 +0000 | [diff] [blame] | 782 | const struct nlattr *bc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | { |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 784 | struct inet_diag_entry entry; |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 785 | struct inet_connection_sock *icsk = inet_csk(sk); |
Arnaldo Carvalho de Melo | 2ad69c5 | 2005-06-18 22:48:55 -0700 | [diff] [blame] | 786 | struct listen_sock *lopt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | struct inet_sock *inet = inet_sk(sk); |
| 788 | int j, s_j; |
| 789 | int reqnum, s_reqnum; |
| 790 | int err = 0; |
| 791 | |
| 792 | s_j = cb->args[3]; |
| 793 | s_reqnum = cb->args[4]; |
| 794 | |
| 795 | if (s_j > 0) |
| 796 | s_j--; |
| 797 | |
| 798 | entry.family = sk->sk_family; |
| 799 | |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 800 | read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 802 | lopt = icsk->icsk_accept_queue.listen_opt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 803 | if (!lopt || !lopt->qlen) |
| 804 | goto out; |
| 805 | |
Pavel Emelyanov | 37f352b | 2011-12-06 07:57:26 +0000 | [diff] [blame] | 806 | if (bc != NULL) { |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 807 | entry.sport = inet->inet_num; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | entry.userlocks = sk->sk_userlocks; |
| 809 | } |
| 810 | |
Arnaldo Carvalho de Melo | 540722f | 2005-08-10 05:54:28 -0300 | [diff] [blame] | 811 | for (j = s_j; j < lopt->nr_table_entries; j++) { |
Arnaldo Carvalho de Melo | 60236fd | 2005-06-18 22:47:21 -0700 | [diff] [blame] | 812 | struct request_sock *req, *head = lopt->syn_table[j]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | |
| 814 | reqnum = 0; |
| 815 | for (req = head; req; reqnum++, req = req->dl_next) { |
Arnaldo Carvalho de Melo | 2e6599c | 2005-06-18 22:46:52 -0700 | [diff] [blame] | 816 | struct inet_request_sock *ireq = inet_rsk(req); |
| 817 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 818 | if (reqnum < s_reqnum) |
| 819 | continue; |
Eric Dumazet | 634fb979 | 2013-10-09 15:21:29 -0700 | [diff] [blame] | 820 | if (r->id.idiag_dport != ireq->ir_rmt_port && |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 821 | r->id.idiag_dport) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | continue; |
| 823 | |
| 824 | if (bc) { |
Neal Cardwell | 1c95df8 | 2012-12-08 19:43:21 +0000 | [diff] [blame] | 825 | inet_diag_req_addrs(sk, req, &entry); |
Eric Dumazet | 634fb979 | 2013-10-09 15:21:29 -0700 | [diff] [blame] | 826 | entry.dport = ntohs(ireq->ir_rmt_port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | |
Pavel Emelyanov | 87c22ea | 2011-12-09 06:21:34 +0000 | [diff] [blame] | 828 | if (!inet_diag_bc_run(bc, &entry)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | continue; |
| 830 | } |
| 831 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 832 | err = inet_diag_fill_req(skb, sk, req, |
Patrick McHardy | e32123e | 2013-04-17 06:46:57 +0000 | [diff] [blame] | 833 | sk_user_ns(NETLINK_CB(cb->skb).sk), |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 834 | NETLINK_CB(cb->skb).portid, |
Arnaldo Carvalho de Melo | 540722f | 2005-08-10 05:54:28 -0300 | [diff] [blame] | 835 | cb->nlh->nlmsg_seq, cb->nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 836 | if (err < 0) { |
| 837 | cb->args[3] = j + 1; |
| 838 | cb->args[4] = reqnum; |
| 839 | goto out; |
| 840 | } |
| 841 | } |
| 842 | |
| 843 | s_reqnum = 0; |
| 844 | } |
| 845 | |
| 846 | out: |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 847 | read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | |
| 849 | return err; |
| 850 | } |
| 851 | |
Pavel Emelyanov | 1942c51 | 2011-12-09 06:23:18 +0000 | [diff] [blame] | 852 | void inet_diag_dump_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *skb, |
Pavel Emelyanov | c899136 | 2012-01-10 22:36:35 +0000 | [diff] [blame] | 853 | struct netlink_callback *cb, struct inet_diag_req_v2 *r, struct nlattr *bc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 854 | { |
| 855 | int i, num; |
| 856 | int s_i, s_num; |
Andrey Vagin | 51d7ccc | 2012-07-16 04:28:49 +0000 | [diff] [blame] | 857 | struct net *net = sock_net(skb->sk); |
Arnaldo Carvalho de Melo | 4e852c0 | 2006-01-09 14:56:19 -0800 | [diff] [blame] | 858 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | s_i = cb->args[1]; |
| 860 | s_num = num = cb->args[2]; |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 861 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 862 | if (cb->args[0] == 0) { |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 863 | if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | goto skip_listen_ht; |
Arnaldo Carvalho de Melo | 540722f | 2005-08-10 05:54:28 -0300 | [diff] [blame] | 865 | |
Arnaldo Carvalho de Melo | 0f7ff92 | 2005-08-09 19:59:44 -0700 | [diff] [blame] | 866 | for (i = s_i; i < INET_LHTABLE_SIZE; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 867 | struct sock *sk; |
Eric Dumazet | c25eb3b | 2008-11-23 17:22:55 -0800 | [diff] [blame] | 868 | struct hlist_nulls_node *node; |
Eric Dumazet | 5caea4e | 2008-11-20 00:40:07 -0800 | [diff] [blame] | 869 | struct inet_listen_hashbucket *ilb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | |
| 871 | num = 0; |
Eric Dumazet | 5caea4e | 2008-11-20 00:40:07 -0800 | [diff] [blame] | 872 | ilb = &hashinfo->listening_hash[i]; |
| 873 | spin_lock_bh(&ilb->lock); |
Eric Dumazet | c25eb3b | 2008-11-23 17:22:55 -0800 | [diff] [blame] | 874 | sk_nulls_for_each(sk, node, &ilb->head) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 875 | struct inet_sock *inet = inet_sk(sk); |
| 876 | |
Andrey Vagin | 51d7ccc | 2012-07-16 04:28:49 +0000 | [diff] [blame] | 877 | if (!net_eq(sock_net(sk), net)) |
| 878 | continue; |
| 879 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 880 | if (num < s_num) { |
| 881 | num++; |
| 882 | continue; |
| 883 | } |
| 884 | |
Pavel Emelyanov | d23deaa | 2011-12-06 07:59:15 +0000 | [diff] [blame] | 885 | if (r->sdiag_family != AF_UNSPEC && |
| 886 | sk->sk_family != r->sdiag_family) |
| 887 | goto next_listen; |
| 888 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 889 | if (r->id.idiag_sport != inet->inet_sport && |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 890 | r->id.idiag_sport) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | goto next_listen; |
| 892 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 893 | if (!(r->idiag_states & TCPF_LISTEN) || |
| 894 | r->id.idiag_dport || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | cb->args[3] > 0) |
| 896 | goto syn_recv; |
| 897 | |
Pavel Emelyanov | 25c4cd2 | 2011-12-06 07:58:58 +0000 | [diff] [blame] | 898 | if (inet_csk_diag_dump(sk, skb, cb, r, bc) < 0) { |
Eric Dumazet | 5caea4e | 2008-11-20 00:40:07 -0800 | [diff] [blame] | 899 | spin_unlock_bh(&ilb->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 900 | goto done; |
| 901 | } |
| 902 | |
| 903 | syn_recv: |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 904 | if (!(r->idiag_states & TCPF_SYN_RECV)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | goto next_listen; |
| 906 | |
Pavel Emelyanov | 25c4cd2 | 2011-12-06 07:58:58 +0000 | [diff] [blame] | 907 | if (inet_diag_dump_reqs(skb, sk, cb, r, bc) < 0) { |
Eric Dumazet | 5caea4e | 2008-11-20 00:40:07 -0800 | [diff] [blame] | 908 | spin_unlock_bh(&ilb->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 909 | goto done; |
| 910 | } |
| 911 | |
| 912 | next_listen: |
| 913 | cb->args[3] = 0; |
| 914 | cb->args[4] = 0; |
| 915 | ++num; |
| 916 | } |
Eric Dumazet | 5caea4e | 2008-11-20 00:40:07 -0800 | [diff] [blame] | 917 | spin_unlock_bh(&ilb->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | |
| 919 | s_num = 0; |
| 920 | cb->args[3] = 0; |
| 921 | cb->args[4] = 0; |
| 922 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 923 | skip_listen_ht: |
| 924 | cb->args[0] = 1; |
| 925 | s_i = num = s_num = 0; |
| 926 | } |
| 927 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 928 | if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV))) |
Pavel Emelyanov | efb3cb4 | 2011-12-09 06:22:26 +0000 | [diff] [blame] | 929 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 930 | |
Eric Dumazet | f373b53 | 2009-10-09 00:16:19 +0000 | [diff] [blame] | 931 | for (i = s_i; i <= hashinfo->ehash_mask; i++) { |
Arnaldo Carvalho de Melo | 540722f | 2005-08-10 05:54:28 -0300 | [diff] [blame] | 932 | struct inet_ehash_bucket *head = &hashinfo->ehash[i]; |
David S. Miller | 7e3aab4 | 2008-11-21 16:39:19 -0800 | [diff] [blame] | 933 | spinlock_t *lock = inet_ehash_lockp(hashinfo, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | struct sock *sk; |
Eric Dumazet | 3ab5aee | 2008-11-16 19:40:17 -0800 | [diff] [blame] | 935 | struct hlist_nulls_node *node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | |
Andi Kleen | 6be547a | 2008-08-28 01:09:54 -0700 | [diff] [blame] | 937 | num = 0; |
| 938 | |
Eric Dumazet | 05dbc7b | 2013-10-03 00:22:02 -0700 | [diff] [blame] | 939 | if (hlist_nulls_empty(&head->chain)) |
Andi Kleen | 6be547a | 2008-08-28 01:09:54 -0700 | [diff] [blame] | 940 | continue; |
| 941 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 942 | if (i > s_i) |
| 943 | s_num = 0; |
| 944 | |
David S. Miller | 7e3aab4 | 2008-11-21 16:39:19 -0800 | [diff] [blame] | 945 | spin_lock_bh(lock); |
Eric Dumazet | 3ab5aee | 2008-11-16 19:40:17 -0800 | [diff] [blame] | 946 | sk_nulls_for_each(sk, node, &head->chain) { |
Eric Dumazet | 05dbc7b | 2013-10-03 00:22:02 -0700 | [diff] [blame] | 947 | int res; |
Neal Cardwell | 70315d2 | 2014-01-10 15:34:45 -0500 | [diff] [blame] | 948 | int state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 949 | |
Andrey Vagin | 51d7ccc | 2012-07-16 04:28:49 +0000 | [diff] [blame] | 950 | if (!net_eq(sock_net(sk), net)) |
| 951 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 952 | if (num < s_num) |
| 953 | goto next_normal; |
Neal Cardwell | 70315d2 | 2014-01-10 15:34:45 -0500 | [diff] [blame] | 954 | state = (sk->sk_state == TCP_TIME_WAIT) ? |
| 955 | inet_twsk(sk)->tw_substate : sk->sk_state; |
| 956 | if (!(r->idiag_states & (1 << state))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 957 | goto next_normal; |
Pavel Emelyanov | d23deaa | 2011-12-06 07:59:15 +0000 | [diff] [blame] | 958 | if (r->sdiag_family != AF_UNSPEC && |
Eric Dumazet | 05dbc7b | 2013-10-03 00:22:02 -0700 | [diff] [blame] | 959 | sk->sk_family != r->sdiag_family) |
Pavel Emelyanov | d23deaa | 2011-12-06 07:59:15 +0000 | [diff] [blame] | 960 | goto next_normal; |
Eric Dumazet | 05dbc7b | 2013-10-03 00:22:02 -0700 | [diff] [blame] | 961 | if (r->id.idiag_sport != htons(sk->sk_num) && |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 962 | r->id.idiag_sport) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 963 | goto next_normal; |
Eric Dumazet | 05dbc7b | 2013-10-03 00:22:02 -0700 | [diff] [blame] | 964 | if (r->id.idiag_dport != sk->sk_dport && |
Arnaldo Carvalho de Melo | 4e852c0 | 2006-01-09 14:56:19 -0800 | [diff] [blame] | 965 | r->id.idiag_dport) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 966 | goto next_normal; |
Eric Dumazet | 05dbc7b | 2013-10-03 00:22:02 -0700 | [diff] [blame] | 967 | if (sk->sk_state == TCP_TIME_WAIT) |
| 968 | res = inet_twsk_diag_dump(sk, skb, cb, r, bc); |
| 969 | else |
| 970 | res = inet_csk_diag_dump(sk, skb, cb, r, bc); |
| 971 | if (res < 0) { |
David S. Miller | 7e3aab4 | 2008-11-21 16:39:19 -0800 | [diff] [blame] | 972 | spin_unlock_bh(lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 973 | goto done; |
| 974 | } |
| 975 | next_normal: |
| 976 | ++num; |
| 977 | } |
| 978 | |
David S. Miller | 7e3aab4 | 2008-11-21 16:39:19 -0800 | [diff] [blame] | 979 | spin_unlock_bh(lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | } |
| 981 | |
| 982 | done: |
| 983 | cb->args[1] = i; |
| 984 | cb->args[2] = num; |
Pavel Emelyanov | efb3cb4 | 2011-12-09 06:22:26 +0000 | [diff] [blame] | 985 | out: |
| 986 | ; |
| 987 | } |
Pavel Emelyanov | 1942c51 | 2011-12-09 06:23:18 +0000 | [diff] [blame] | 988 | EXPORT_SYMBOL_GPL(inet_diag_dump_icsk); |
Pavel Emelyanov | efb3cb4 | 2011-12-09 06:22:26 +0000 | [diff] [blame] | 989 | |
| 990 | static int __inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb, |
Pavel Emelyanov | c899136 | 2012-01-10 22:36:35 +0000 | [diff] [blame] | 991 | struct inet_diag_req_v2 *r, struct nlattr *bc) |
Pavel Emelyanov | efb3cb4 | 2011-12-09 06:22:26 +0000 | [diff] [blame] | 992 | { |
| 993 | const struct inet_diag_handler *handler; |
Cyrill Gorcunov | cacb6ba | 2012-11-03 09:30:34 +0000 | [diff] [blame] | 994 | int err = 0; |
Pavel Emelyanov | efb3cb4 | 2011-12-09 06:22:26 +0000 | [diff] [blame] | 995 | |
| 996 | handler = inet_diag_lock_handler(r->sdiag_protocol); |
| 997 | if (!IS_ERR(handler)) |
Pavel Emelyanov | 1942c51 | 2011-12-09 06:23:18 +0000 | [diff] [blame] | 998 | handler->dump(skb, cb, r, bc); |
Cyrill Gorcunov | cacb6ba | 2012-11-03 09:30:34 +0000 | [diff] [blame] | 999 | else |
| 1000 | err = PTR_ERR(handler); |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 1001 | inet_diag_unlock_handler(handler); |
Pavel Emelyanov | efb3cb4 | 2011-12-09 06:22:26 +0000 | [diff] [blame] | 1002 | |
Cyrill Gorcunov | cacb6ba | 2012-11-03 09:30:34 +0000 | [diff] [blame] | 1003 | return err ? : skb->len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | } |
| 1005 | |
Pavel Emelyanov | 25c4cd2 | 2011-12-06 07:58:58 +0000 | [diff] [blame] | 1006 | static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb) |
| 1007 | { |
| 1008 | struct nlattr *bc = NULL; |
Pavel Emelyanov | c899136 | 2012-01-10 22:36:35 +0000 | [diff] [blame] | 1009 | int hdrlen = sizeof(struct inet_diag_req_v2); |
Pavel Emelyanov | 25c4cd2 | 2011-12-06 07:58:58 +0000 | [diff] [blame] | 1010 | |
| 1011 | if (nlmsg_attrlen(cb->nlh, hdrlen)) |
| 1012 | bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE); |
| 1013 | |
David S. Miller | d106352 | 2012-06-26 21:28:54 -0700 | [diff] [blame] | 1014 | return __inet_diag_dump(skb, cb, nlmsg_data(cb->nlh), bc); |
Pavel Emelyanov | 25c4cd2 | 2011-12-06 07:58:58 +0000 | [diff] [blame] | 1015 | } |
| 1016 | |
Pavel Emelyanov | a029fe2 | 2011-12-06 07:59:32 +0000 | [diff] [blame] | 1017 | static inline int inet_diag_type2proto(int type) |
| 1018 | { |
| 1019 | switch (type) { |
| 1020 | case TCPDIAG_GETSOCK: |
| 1021 | return IPPROTO_TCP; |
| 1022 | case DCCPDIAG_GETSOCK: |
| 1023 | return IPPROTO_DCCP; |
| 1024 | default: |
| 1025 | return 0; |
| 1026 | } |
| 1027 | } |
| 1028 | |
Pavel Emelyanov | 25c4cd2 | 2011-12-06 07:58:58 +0000 | [diff] [blame] | 1029 | static int inet_diag_dump_compat(struct sk_buff *skb, struct netlink_callback *cb) |
| 1030 | { |
David S. Miller | d106352 | 2012-06-26 21:28:54 -0700 | [diff] [blame] | 1031 | struct inet_diag_req *rc = nlmsg_data(cb->nlh); |
Pavel Emelyanov | c899136 | 2012-01-10 22:36:35 +0000 | [diff] [blame] | 1032 | struct inet_diag_req_v2 req; |
Pavel Emelyanov | 25c4cd2 | 2011-12-06 07:58:58 +0000 | [diff] [blame] | 1033 | struct nlattr *bc = NULL; |
Pavel Emelyanov | 3b09c84 | 2012-01-10 22:37:26 +0000 | [diff] [blame] | 1034 | int hdrlen = sizeof(struct inet_diag_req); |
Pavel Emelyanov | 25c4cd2 | 2011-12-06 07:58:58 +0000 | [diff] [blame] | 1035 | |
Pavel Emelyanov | d23deaa | 2011-12-06 07:59:15 +0000 | [diff] [blame] | 1036 | req.sdiag_family = AF_UNSPEC; /* compatibility */ |
Pavel Emelyanov | 25c4cd2 | 2011-12-06 07:58:58 +0000 | [diff] [blame] | 1037 | req.sdiag_protocol = inet_diag_type2proto(cb->nlh->nlmsg_type); |
| 1038 | req.idiag_ext = rc->idiag_ext; |
| 1039 | req.idiag_states = rc->idiag_states; |
| 1040 | req.id = rc->id; |
| 1041 | |
| 1042 | if (nlmsg_attrlen(cb->nlh, hdrlen)) |
| 1043 | bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE); |
| 1044 | |
| 1045 | return __inet_diag_dump(skb, cb, &req, bc); |
| 1046 | } |
| 1047 | |
Pavel Emelyanov | fe50ce2 | 2011-12-06 07:58:39 +0000 | [diff] [blame] | 1048 | static int inet_diag_get_exact_compat(struct sk_buff *in_skb, |
| 1049 | const struct nlmsghdr *nlh) |
| 1050 | { |
David S. Miller | d106352 | 2012-06-26 21:28:54 -0700 | [diff] [blame] | 1051 | struct inet_diag_req *rc = nlmsg_data(nlh); |
Pavel Emelyanov | c899136 | 2012-01-10 22:36:35 +0000 | [diff] [blame] | 1052 | struct inet_diag_req_v2 req; |
Pavel Emelyanov | fe50ce2 | 2011-12-06 07:58:39 +0000 | [diff] [blame] | 1053 | |
| 1054 | req.sdiag_family = rc->idiag_family; |
| 1055 | req.sdiag_protocol = inet_diag_type2proto(nlh->nlmsg_type); |
| 1056 | req.idiag_ext = rc->idiag_ext; |
| 1057 | req.idiag_states = rc->idiag_states; |
| 1058 | req.id = rc->id; |
| 1059 | |
| 1060 | return inet_diag_get_exact(in_skb, nlh, &req); |
| 1061 | } |
| 1062 | |
Pavel Emelyanov | 8d34172 | 2011-12-06 07:57:06 +0000 | [diff] [blame] | 1063 | 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] | 1064 | { |
Pavel Emelyanov | 3b09c84 | 2012-01-10 22:37:26 +0000 | [diff] [blame] | 1065 | int hdrlen = sizeof(struct inet_diag_req); |
Andrey Vagin | 51d7ccc | 2012-07-16 04:28:49 +0000 | [diff] [blame] | 1066 | struct net *net = sock_net(skb->sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | |
Thomas Graf | ead592b | 2007-03-22 23:30:35 -0700 | [diff] [blame] | 1068 | if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX || |
| 1069 | nlmsg_len(nlh) < hdrlen) |
| 1070 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | |
David S. Miller | b8f3ab4 | 2011-01-18 12:40:38 -0800 | [diff] [blame] | 1072 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
Thomas Graf | ead592b | 2007-03-22 23:30:35 -0700 | [diff] [blame] | 1073 | if (nlmsg_attrlen(nlh, hdrlen)) { |
| 1074 | struct nlattr *attr; |
| 1075 | |
| 1076 | attr = nlmsg_find_attr(nlh, hdrlen, |
| 1077 | INET_DIAG_REQ_BYTECODE); |
| 1078 | if (attr == NULL || |
| 1079 | nla_len(attr) < sizeof(struct inet_diag_bc_op) || |
| 1080 | inet_diag_bc_audit(nla_data(attr), nla_len(attr))) |
| 1081 | return -EINVAL; |
| 1082 | } |
Pablo Neira Ayuso | 80d326f | 2012-02-24 14:30:15 +0000 | [diff] [blame] | 1083 | { |
| 1084 | struct netlink_dump_control c = { |
| 1085 | .dump = inet_diag_dump_compat, |
| 1086 | }; |
Andrey Vagin | 51d7ccc | 2012-07-16 04:28:49 +0000 | [diff] [blame] | 1087 | return netlink_dump_start(net->diag_nlsk, skb, nlh, &c); |
Pablo Neira Ayuso | 80d326f | 2012-02-24 14:30:15 +0000 | [diff] [blame] | 1088 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1089 | } |
Thomas Graf | ead592b | 2007-03-22 23:30:35 -0700 | [diff] [blame] | 1090 | |
Pavel Emelyanov | fe50ce2 | 2011-12-06 07:58:39 +0000 | [diff] [blame] | 1091 | return inet_diag_get_exact_compat(skb, nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1092 | } |
| 1093 | |
Pavel Emelyanov | d366477 | 2011-12-06 07:58:03 +0000 | [diff] [blame] | 1094 | static int inet_diag_handler_dump(struct sk_buff *skb, struct nlmsghdr *h) |
| 1095 | { |
Pavel Emelyanov | c899136 | 2012-01-10 22:36:35 +0000 | [diff] [blame] | 1096 | int hdrlen = sizeof(struct inet_diag_req_v2); |
Andrey Vagin | 51d7ccc | 2012-07-16 04:28:49 +0000 | [diff] [blame] | 1097 | struct net *net = sock_net(skb->sk); |
Pavel Emelyanov | d366477 | 2011-12-06 07:58:03 +0000 | [diff] [blame] | 1098 | |
| 1099 | if (nlmsg_len(h) < hdrlen) |
| 1100 | return -EINVAL; |
| 1101 | |
| 1102 | if (h->nlmsg_flags & NLM_F_DUMP) { |
Pavel Emelyanov | 25c4cd2 | 2011-12-06 07:58:58 +0000 | [diff] [blame] | 1103 | if (nlmsg_attrlen(h, hdrlen)) { |
| 1104 | struct nlattr *attr; |
| 1105 | attr = nlmsg_find_attr(h, hdrlen, |
| 1106 | INET_DIAG_REQ_BYTECODE); |
| 1107 | if (attr == NULL || |
| 1108 | nla_len(attr) < sizeof(struct inet_diag_bc_op) || |
| 1109 | inet_diag_bc_audit(nla_data(attr), nla_len(attr))) |
| 1110 | return -EINVAL; |
| 1111 | } |
Pablo Neira Ayuso | 80d326f | 2012-02-24 14:30:15 +0000 | [diff] [blame] | 1112 | { |
| 1113 | struct netlink_dump_control c = { |
| 1114 | .dump = inet_diag_dump, |
| 1115 | }; |
Andrey Vagin | 51d7ccc | 2012-07-16 04:28:49 +0000 | [diff] [blame] | 1116 | return netlink_dump_start(net->diag_nlsk, skb, h, &c); |
Pablo Neira Ayuso | 80d326f | 2012-02-24 14:30:15 +0000 | [diff] [blame] | 1117 | } |
Pavel Emelyanov | d366477 | 2011-12-06 07:58:03 +0000 | [diff] [blame] | 1118 | } |
| 1119 | |
David S. Miller | d106352 | 2012-06-26 21:28:54 -0700 | [diff] [blame] | 1120 | return inet_diag_get_exact(skb, h, nlmsg_data(h)); |
Pavel Emelyanov | d366477 | 2011-12-06 07:58:03 +0000 | [diff] [blame] | 1121 | } |
| 1122 | |
Shan Wei | 8dcf01f | 2012-04-24 18:21:07 +0000 | [diff] [blame] | 1123 | static const struct sock_diag_handler inet_diag_handler = { |
Pavel Emelyanov | d366477 | 2011-12-06 07:58:03 +0000 | [diff] [blame] | 1124 | .family = AF_INET, |
| 1125 | .dump = inet_diag_handler_dump, |
| 1126 | }; |
| 1127 | |
Shan Wei | 8dcf01f | 2012-04-24 18:21:07 +0000 | [diff] [blame] | 1128 | static const struct sock_diag_handler inet6_diag_handler = { |
Pavel Emelyanov | d366477 | 2011-12-06 07:58:03 +0000 | [diff] [blame] | 1129 | .family = AF_INET6, |
| 1130 | .dump = inet_diag_handler_dump, |
| 1131 | }; |
| 1132 | |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 1133 | int inet_diag_register(const struct inet_diag_handler *h) |
| 1134 | { |
| 1135 | const __u16 type = h->idiag_type; |
| 1136 | int err = -EINVAL; |
| 1137 | |
Pavel Emelyanov | f13c95f | 2011-12-06 08:05:24 +0000 | [diff] [blame] | 1138 | if (type >= IPPROTO_MAX) |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 1139 | goto out; |
| 1140 | |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 1141 | mutex_lock(&inet_diag_table_mutex); |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 1142 | err = -EEXIST; |
| 1143 | if (inet_diag_table[type] == NULL) { |
| 1144 | inet_diag_table[type] = h; |
| 1145 | err = 0; |
| 1146 | } |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 1147 | mutex_unlock(&inet_diag_table_mutex); |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 1148 | out: |
| 1149 | return err; |
| 1150 | } |
| 1151 | EXPORT_SYMBOL_GPL(inet_diag_register); |
| 1152 | |
| 1153 | void inet_diag_unregister(const struct inet_diag_handler *h) |
| 1154 | { |
| 1155 | const __u16 type = h->idiag_type; |
| 1156 | |
Pavel Emelyanov | f13c95f | 2011-12-06 08:05:24 +0000 | [diff] [blame] | 1157 | if (type >= IPPROTO_MAX) |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 1158 | return; |
| 1159 | |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 1160 | mutex_lock(&inet_diag_table_mutex); |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 1161 | inet_diag_table[type] = NULL; |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 1162 | mutex_unlock(&inet_diag_table_mutex); |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 1163 | } |
| 1164 | EXPORT_SYMBOL_GPL(inet_diag_unregister); |
| 1165 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 1166 | static int __init inet_diag_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1167 | { |
Pavel Emelyanov | f13c95f | 2011-12-06 08:05:24 +0000 | [diff] [blame] | 1168 | const int inet_diag_table_size = (IPPROTO_MAX * |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 1169 | sizeof(struct inet_diag_handler *)); |
| 1170 | int err = -ENOMEM; |
| 1171 | |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 1172 | inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL); |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 1173 | if (!inet_diag_table) |
| 1174 | goto out; |
| 1175 | |
Pavel Emelyanov | d366477 | 2011-12-06 07:58:03 +0000 | [diff] [blame] | 1176 | err = sock_diag_register(&inet_diag_handler); |
| 1177 | if (err) |
| 1178 | goto out_free_nl; |
| 1179 | |
| 1180 | err = sock_diag_register(&inet6_diag_handler); |
| 1181 | if (err) |
| 1182 | goto out_free_inet; |
| 1183 | |
Pavel Emelyanov | 8ef874b | 2011-12-06 07:59:52 +0000 | [diff] [blame] | 1184 | sock_diag_register_inet_compat(inet_diag_rcv_msg_compat); |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 1185 | out: |
| 1186 | return err; |
Pavel Emelyanov | d366477 | 2011-12-06 07:58:03 +0000 | [diff] [blame] | 1187 | |
| 1188 | out_free_inet: |
| 1189 | sock_diag_unregister(&inet_diag_handler); |
| 1190 | out_free_nl: |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 1191 | kfree(inet_diag_table); |
| 1192 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1193 | } |
| 1194 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 1195 | static void __exit inet_diag_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1196 | { |
Pavel Emelyanov | d366477 | 2011-12-06 07:58:03 +0000 | [diff] [blame] | 1197 | sock_diag_unregister(&inet6_diag_handler); |
| 1198 | sock_diag_unregister(&inet_diag_handler); |
Pavel Emelyanov | 8ef874b | 2011-12-06 07:59:52 +0000 | [diff] [blame] | 1199 | sock_diag_unregister_inet_compat(inet_diag_rcv_msg_compat); |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 1200 | kfree(inet_diag_table); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1201 | } |
| 1202 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 1203 | module_init(inet_diag_init); |
| 1204 | module_exit(inet_diag_exit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1205 | MODULE_LICENSE("GPL"); |
Pavel Emelyanov | aec8dc6 | 2011-12-15 02:43:27 +0000 | [diff] [blame] | 1206 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2 /* AF_INET */); |
| 1207 | MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 10 /* AF_INET6 */); |