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> |
| 17 | #include <linux/cache.h> |
| 18 | #include <linux/init.h> |
| 19 | #include <linux/time.h> |
| 20 | |
| 21 | #include <net/icmp.h> |
| 22 | #include <net/tcp.h> |
| 23 | #include <net/ipv6.h> |
| 24 | #include <net/inet_common.h> |
Arnaldo Carvalho de Melo | 505cbfc | 2005-08-12 09:19:38 -0300 | [diff] [blame] | 25 | #include <net/inet_connection_sock.h> |
| 26 | #include <net/inet_hashtables.h> |
| 27 | #include <net/inet_timewait_sock.h> |
| 28 | #include <net/inet6_hashtables.h> |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 29 | #include <net/netlink.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | |
| 31 | #include <linux/inet.h> |
| 32 | #include <linux/stddef.h> |
| 33 | |
Arnaldo Carvalho de Melo | a8c2190 | 2005-08-12 12:56:38 -0300 | [diff] [blame] | 34 | #include <linux/inet_diag.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 36 | static const struct inet_diag_handler **inet_diag_table; |
| 37 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 38 | struct inet_diag_entry { |
Al Viro | 9f85529 | 2006-09-27 18:44:30 -0700 | [diff] [blame] | 39 | __be32 *saddr; |
| 40 | __be32 *daddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | u16 sport; |
| 42 | u16 dport; |
| 43 | u16 family; |
| 44 | u16 userlocks; |
| 45 | }; |
| 46 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 47 | static struct sock *idiagnl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 49 | #define INET_DIAG_PUT(skb, attrtype, attrlen) \ |
Stephen Hemminger | 7c99c90 | 2005-06-23 12:20:36 -0700 | [diff] [blame] | 50 | RTA_DATA(__RTA_PUT(skb, attrtype, attrlen)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 52 | static DEFINE_MUTEX(inet_diag_table_mutex); |
| 53 | |
| 54 | static const struct inet_diag_handler *inet_diag_lock_handler(int type) |
| 55 | { |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 56 | if (!inet_diag_table[type]) |
| 57 | request_module("net-pf-%d-proto-%d-type-%d", PF_NETLINK, |
| 58 | NETLINK_INET_DIAG, type); |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 59 | |
| 60 | mutex_lock(&inet_diag_table_mutex); |
| 61 | if (!inet_diag_table[type]) |
| 62 | return ERR_PTR(-ENOENT); |
| 63 | |
| 64 | return inet_diag_table[type]; |
| 65 | } |
| 66 | |
| 67 | static inline void inet_diag_unlock_handler( |
| 68 | const struct inet_diag_handler *handler) |
| 69 | { |
| 70 | mutex_unlock(&inet_diag_table_mutex); |
| 71 | } |
| 72 | |
Arnaldo Carvalho de Melo | dff2c03 | 2006-01-09 14:56:56 -0800 | [diff] [blame] | 73 | static int inet_csk_diag_fill(struct sock *sk, |
| 74 | struct sk_buff *skb, |
| 75 | int ext, u32 pid, u32 seq, u16 nlmsg_flags, |
| 76 | const struct nlmsghdr *unlh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | { |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 78 | const struct inet_sock *inet = inet_sk(sk); |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 79 | const struct inet_connection_sock *icsk = inet_csk(sk); |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 80 | struct inet_diag_msg *r; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | struct nlmsghdr *nlh; |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 82 | void *info = NULL; |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 83 | struct inet_diag_meminfo *minfo = NULL; |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 84 | unsigned char *b = skb_tail_pointer(skb); |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 85 | const struct inet_diag_handler *handler; |
| 86 | |
| 87 | handler = inet_diag_table[unlh->nlmsg_type]; |
| 88 | BUG_ON(handler == NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | |
Arnaldo Carvalho de Melo | 540722f | 2005-08-10 05:54:28 -0300 | [diff] [blame] | 90 | nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | nlh->nlmsg_flags = nlmsg_flags; |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 92 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | r = NLMSG_DATA(nlh); |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 94 | BUG_ON(sk->sk_state == TCP_TIME_WAIT); |
Arnaldo Carvalho de Melo | 4e852c0 | 2006-01-09 14:56:19 -0800 | [diff] [blame] | 95 | |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 96 | if (ext & (1 << (INET_DIAG_MEMINFO - 1))) |
| 97 | minfo = INET_DIAG_PUT(skb, INET_DIAG_MEMINFO, sizeof(*minfo)); |
| 98 | |
| 99 | if (ext & (1 << (INET_DIAG_INFO - 1))) |
| 100 | info = INET_DIAG_PUT(skb, INET_DIAG_INFO, |
| 101 | handler->idiag_info_size); |
| 102 | |
| 103 | if ((ext & (1 << (INET_DIAG_CONG - 1))) && icsk->icsk_ca_ops) { |
| 104 | const size_t len = strlen(icsk->icsk_ca_ops->name); |
| 105 | |
| 106 | strcpy(INET_DIAG_PUT(skb, INET_DIAG_CONG, len + 1), |
| 107 | icsk->icsk_ca_ops->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | } |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 109 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 110 | r->idiag_family = sk->sk_family; |
| 111 | r->idiag_state = sk->sk_state; |
| 112 | r->idiag_timer = 0; |
| 113 | r->idiag_retrans = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 115 | r->id.idiag_if = sk->sk_bound_dev_if; |
| 116 | r->id.idiag_cookie[0] = (u32)(unsigned long)sk; |
| 117 | r->id.idiag_cookie[1] = (u32)(((unsigned long)sk >> 31) >> 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 119 | r->id.idiag_sport = inet->inet_sport; |
| 120 | r->id.idiag_dport = inet->inet_dport; |
| 121 | r->id.idiag_src[0] = inet->inet_rcv_saddr; |
| 122 | r->id.idiag_dst[0] = inet->inet_daddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | |
Arnaldo Carvalho de Melo | 505cbfc | 2005-08-12 09:19:38 -0300 | [diff] [blame] | 124 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 125 | if (r->idiag_family == AF_INET6) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | struct ipv6_pinfo *np = inet6_sk(sk); |
| 127 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 128 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_src, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | &np->rcv_saddr); |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 130 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | &np->daddr); |
| 132 | } |
| 133 | #endif |
| 134 | |
Ilpo Järvinen | 172589c | 2007-08-28 15:50:33 -0700 | [diff] [blame] | 135 | #define EXPIRES_IN_MS(tmo) DIV_ROUND_UP((tmo - jiffies) * 1000, HZ) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 137 | if (icsk->icsk_pending == ICSK_TIME_RETRANS) { |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 138 | r->idiag_timer = 1; |
| 139 | r->idiag_retrans = icsk->icsk_retransmits; |
| 140 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 141 | } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) { |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 142 | r->idiag_timer = 4; |
| 143 | r->idiag_retrans = icsk->icsk_probes_out; |
| 144 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | } else if (timer_pending(&sk->sk_timer)) { |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 146 | r->idiag_timer = 2; |
| 147 | r->idiag_retrans = icsk->icsk_probes_out; |
| 148 | r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | } else { |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 150 | r->idiag_timer = 0; |
| 151 | r->idiag_expires = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | } |
| 153 | #undef EXPIRES_IN_MS |
Arnaldo Carvalho de Melo | 540722f | 2005-08-10 05:54:28 -0300 | [diff] [blame] | 154 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 155 | r->idiag_uid = sock_i_uid(sk); |
| 156 | r->idiag_inode = sock_i_ino(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | |
| 158 | if (minfo) { |
Eric Dumazet | 31e6d36 | 2009-06-17 19:05:41 -0700 | [diff] [blame] | 159 | minfo->idiag_rmem = sk_rmem_alloc_get(sk); |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 160 | minfo->idiag_wmem = sk->sk_wmem_queued; |
| 161 | minfo->idiag_fmem = sk->sk_forward_alloc; |
Eric Dumazet | 31e6d36 | 2009-06-17 19:05:41 -0700 | [diff] [blame] | 162 | minfo->idiag_tmem = sk_wmem_alloc_get(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | } |
| 164 | |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 165 | handler->idiag_get_info(sk, r, info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | |
Arnaldo Carvalho de Melo | 6687e98 | 2005-08-10 04:03:31 -0300 | [diff] [blame] | 167 | if (sk->sk_state < TCP_TIME_WAIT && |
| 168 | icsk->icsk_ca_ops && icsk->icsk_ca_ops->get_info) |
| 169 | icsk->icsk_ca_ops->get_info(sk, ext, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 171 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | return skb->len; |
| 173 | |
Stephen Hemminger | 7c99c90 | 2005-06-23 12:20:36 -0700 | [diff] [blame] | 174 | rtattr_failure: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | nlmsg_failure: |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 176 | nlmsg_trim(skb, b); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 177 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | } |
| 179 | |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 180 | static int inet_twsk_diag_fill(struct inet_timewait_sock *tw, |
| 181 | struct sk_buff *skb, int ext, u32 pid, |
| 182 | u32 seq, u16 nlmsg_flags, |
| 183 | const struct nlmsghdr *unlh) |
| 184 | { |
| 185 | long tmo; |
| 186 | struct inet_diag_msg *r; |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 187 | const unsigned char *previous_tail = skb_tail_pointer(skb); |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 188 | struct nlmsghdr *nlh = NLMSG_PUT(skb, pid, seq, |
| 189 | unlh->nlmsg_type, sizeof(*r)); |
| 190 | |
| 191 | r = NLMSG_DATA(nlh); |
| 192 | BUG_ON(tw->tw_state != TCP_TIME_WAIT); |
| 193 | |
| 194 | nlh->nlmsg_flags = nlmsg_flags; |
| 195 | |
| 196 | tmo = tw->tw_ttd - jiffies; |
| 197 | if (tmo < 0) |
| 198 | tmo = 0; |
| 199 | |
| 200 | r->idiag_family = tw->tw_family; |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 201 | r->idiag_retrans = 0; |
| 202 | r->id.idiag_if = tw->tw_bound_dev_if; |
| 203 | r->id.idiag_cookie[0] = (u32)(unsigned long)tw; |
| 204 | r->id.idiag_cookie[1] = (u32)(((unsigned long)tw >> 31) >> 1); |
| 205 | r->id.idiag_sport = tw->tw_sport; |
| 206 | r->id.idiag_dport = tw->tw_dport; |
| 207 | r->id.idiag_src[0] = tw->tw_rcv_saddr; |
| 208 | r->id.idiag_dst[0] = tw->tw_daddr; |
| 209 | r->idiag_state = tw->tw_substate; |
| 210 | r->idiag_timer = 3; |
Ilpo Järvinen | 172589c | 2007-08-28 15:50:33 -0700 | [diff] [blame] | 211 | r->idiag_expires = DIV_ROUND_UP(tmo * 1000, HZ); |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 212 | r->idiag_rqueue = 0; |
| 213 | r->idiag_wqueue = 0; |
| 214 | r->idiag_uid = 0; |
| 215 | r->idiag_inode = 0; |
| 216 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
| 217 | if (tw->tw_family == AF_INET6) { |
| 218 | const struct inet6_timewait_sock *tw6 = |
| 219 | inet6_twsk((struct sock *)tw); |
| 220 | |
| 221 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_src, |
| 222 | &tw6->tw_v6_rcv_saddr); |
| 223 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst, |
| 224 | &tw6->tw_v6_daddr); |
| 225 | } |
| 226 | #endif |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 227 | nlh->nlmsg_len = skb_tail_pointer(skb) - previous_tail; |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 228 | return skb->len; |
| 229 | nlmsg_failure: |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 230 | nlmsg_trim(skb, previous_tail); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 231 | return -EMSGSIZE; |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 232 | } |
| 233 | |
Arnaldo Carvalho de Melo | dff2c03 | 2006-01-09 14:56:56 -0800 | [diff] [blame] | 234 | static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, |
| 235 | int ext, u32 pid, u32 seq, u16 nlmsg_flags, |
| 236 | const struct nlmsghdr *unlh) |
| 237 | { |
| 238 | if (sk->sk_state == TCP_TIME_WAIT) |
| 239 | return inet_twsk_diag_fill((struct inet_timewait_sock *)sk, |
| 240 | skb, ext, pid, seq, nlmsg_flags, |
| 241 | unlh); |
| 242 | return inet_csk_diag_fill(sk, skb, ext, pid, seq, nlmsg_flags, unlh); |
| 243 | } |
| 244 | |
Arnaldo Carvalho de Melo | 4e852c0 | 2006-01-09 14:56:19 -0800 | [diff] [blame] | 245 | static int inet_diag_get_exact(struct sk_buff *in_skb, |
| 246 | const struct nlmsghdr *nlh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | { |
| 248 | int err; |
| 249 | struct sock *sk; |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 250 | struct inet_diag_req *req = NLMSG_DATA(nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | struct sk_buff *rep; |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 252 | struct inet_hashinfo *hashinfo; |
| 253 | const struct inet_diag_handler *handler; |
| 254 | |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 255 | handler = inet_diag_lock_handler(nlh->nlmsg_type); |
Arnaldo Carvalho de Melo | 8cf8e5a | 2008-01-28 20:52:12 -0800 | [diff] [blame] | 256 | if (IS_ERR(handler)) { |
| 257 | err = PTR_ERR(handler); |
| 258 | goto unlock; |
| 259 | } |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 260 | |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 261 | hashinfo = handler->idiag_hashinfo; |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 262 | err = -EINVAL; |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 263 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 264 | if (req->idiag_family == AF_INET) { |
Pavel Emelyanov | c67499c | 2008-01-31 05:06:40 -0800 | [diff] [blame] | 265 | sk = inet_lookup(&init_net, hashinfo, req->id.idiag_dst[0], |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 266 | req->id.idiag_dport, req->id.idiag_src[0], |
| 267 | req->id.idiag_sport, req->id.idiag_if); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | } |
Arnaldo Carvalho de Melo | 505cbfc | 2005-08-12 09:19:38 -0300 | [diff] [blame] | 269 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 270 | else if (req->idiag_family == AF_INET6) { |
Pavel Emelyanov | d86e0da | 2008-01-31 05:07:21 -0800 | [diff] [blame] | 271 | sk = inet6_lookup(&init_net, hashinfo, |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 272 | (struct in6_addr *)req->id.idiag_dst, |
| 273 | req->id.idiag_dport, |
| 274 | (struct in6_addr *)req->id.idiag_src, |
| 275 | req->id.idiag_sport, |
| 276 | req->id.idiag_if); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | } |
| 278 | #endif |
| 279 | else { |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 280 | goto unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | } |
| 282 | |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 283 | err = -ENOENT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | if (sk == NULL) |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 285 | goto unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | |
| 287 | err = -ESTALE; |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 288 | if ((req->id.idiag_cookie[0] != INET_DIAG_NOCOOKIE || |
| 289 | req->id.idiag_cookie[1] != INET_DIAG_NOCOOKIE) && |
| 290 | ((u32)(unsigned long)sk != req->id.idiag_cookie[0] || |
| 291 | (u32)((((unsigned long)sk) >> 31) >> 1) != req->id.idiag_cookie[1])) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | goto out; |
| 293 | |
| 294 | err = -ENOMEM; |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 295 | rep = alloc_skb(NLMSG_SPACE((sizeof(struct inet_diag_msg) + |
| 296 | sizeof(struct inet_diag_meminfo) + |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 297 | handler->idiag_info_size + 64)), |
| 298 | GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | if (!rep) |
| 300 | goto out; |
| 301 | |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 302 | err = sk_diag_fill(sk, rep, req->idiag_ext, |
| 303 | NETLINK_CB(in_skb).pid, |
| 304 | nlh->nlmsg_seq, 0, nlh); |
| 305 | if (err < 0) { |
| 306 | WARN_ON(err == -EMSGSIZE); |
| 307 | kfree_skb(rep); |
| 308 | goto out; |
| 309 | } |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 310 | err = netlink_unicast(idiagnl, rep, NETLINK_CB(in_skb).pid, |
| 311 | MSG_DONTWAIT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | if (err > 0) |
| 313 | err = 0; |
| 314 | |
| 315 | out: |
| 316 | if (sk) { |
| 317 | if (sk->sk_state == TCP_TIME_WAIT) |
Arnaldo Carvalho de Melo | 8feaf0c | 2005-08-09 20:09:30 -0700 | [diff] [blame] | 318 | inet_twsk_put((struct inet_timewait_sock *)sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | else |
| 320 | sock_put(sk); |
| 321 | } |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 322 | unlock: |
| 323 | inet_diag_unlock_handler(handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | return err; |
| 325 | } |
| 326 | |
Al Viro | 9f85529 | 2006-09-27 18:44:30 -0700 | [diff] [blame] | 327 | static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | { |
| 329 | int words = bits >> 5; |
| 330 | |
| 331 | bits &= 0x1f; |
| 332 | |
| 333 | if (words) { |
| 334 | if (memcmp(a1, a2, words << 2)) |
| 335 | return 0; |
| 336 | } |
| 337 | if (bits) { |
Al Viro | 9f85529 | 2006-09-27 18:44:30 -0700 | [diff] [blame] | 338 | __be32 w1, w2; |
| 339 | __be32 mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | |
| 341 | w1 = a1[words]; |
| 342 | w2 = a2[words]; |
| 343 | |
| 344 | mask = htonl((0xffffffff) << (32 - bits)); |
| 345 | |
| 346 | if ((w1 ^ w2) & mask) |
| 347 | return 0; |
| 348 | } |
| 349 | |
| 350 | return 1; |
| 351 | } |
| 352 | |
| 353 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 354 | static int inet_diag_bc_run(const void *bc, int len, |
Arnaldo Carvalho de Melo | 4e852c0 | 2006-01-09 14:56:19 -0800 | [diff] [blame] | 355 | const struct inet_diag_entry *entry) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | { |
| 357 | while (len > 0) { |
| 358 | int yes = 1; |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 359 | const struct inet_diag_bc_op *op = bc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | |
| 361 | switch (op->code) { |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 362 | case INET_DIAG_BC_NOP: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | break; |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 364 | case INET_DIAG_BC_JMP: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | yes = 0; |
| 366 | break; |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 367 | case INET_DIAG_BC_S_GE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | yes = entry->sport >= op[1].no; |
| 369 | break; |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 370 | case INET_DIAG_BC_S_LE: |
Roel Kluin | b4ced2b | 2010-01-19 14:12:20 -0800 | [diff] [blame^] | 371 | yes = entry->sport <= op[1].no; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | break; |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 373 | case INET_DIAG_BC_D_GE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | yes = entry->dport >= op[1].no; |
| 375 | break; |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 376 | case INET_DIAG_BC_D_LE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | yes = entry->dport <= op[1].no; |
| 378 | break; |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 379 | case INET_DIAG_BC_AUTO: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | yes = !(entry->userlocks & SOCK_BINDPORT_LOCK); |
| 381 | break; |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 382 | case INET_DIAG_BC_S_COND: |
Arnaldo Carvalho de Melo | a8c2190 | 2005-08-12 12:56:38 -0300 | [diff] [blame] | 383 | case INET_DIAG_BC_D_COND: { |
| 384 | struct inet_diag_hostcond *cond; |
Al Viro | 9f85529 | 2006-09-27 18:44:30 -0700 | [diff] [blame] | 385 | __be32 *addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | |
Arnaldo Carvalho de Melo | a8c2190 | 2005-08-12 12:56:38 -0300 | [diff] [blame] | 387 | cond = (struct inet_diag_hostcond *)(op + 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | if (cond->port != -1 && |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 389 | cond->port != (op->code == INET_DIAG_BC_S_COND ? |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | entry->sport : entry->dport)) { |
| 391 | yes = 0; |
| 392 | break; |
| 393 | } |
Arnaldo Carvalho de Melo | 4e852c0 | 2006-01-09 14:56:19 -0800 | [diff] [blame] | 394 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | if (cond->prefix_len == 0) |
| 396 | break; |
| 397 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 398 | if (op->code == INET_DIAG_BC_S_COND) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | addr = entry->saddr; |
| 400 | else |
| 401 | addr = entry->daddr; |
| 402 | |
Arnaldo Carvalho de Melo | 4e852c0 | 2006-01-09 14:56:19 -0800 | [diff] [blame] | 403 | if (bitstring_match(addr, cond->addr, |
| 404 | cond->prefix_len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | break; |
| 406 | if (entry->family == AF_INET6 && |
| 407 | cond->family == AF_INET) { |
| 408 | if (addr[0] == 0 && addr[1] == 0 && |
| 409 | addr[2] == htonl(0xffff) && |
Arnaldo Carvalho de Melo | a8c2190 | 2005-08-12 12:56:38 -0300 | [diff] [blame] | 410 | bitstring_match(addr + 3, cond->addr, |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 411 | cond->prefix_len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | break; |
| 413 | } |
| 414 | yes = 0; |
| 415 | break; |
| 416 | } |
| 417 | } |
| 418 | |
Arnaldo Carvalho de Melo | 4e852c0 | 2006-01-09 14:56:19 -0800 | [diff] [blame] | 419 | if (yes) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | len -= op->yes; |
| 421 | bc += op->yes; |
| 422 | } else { |
| 423 | len -= op->no; |
| 424 | bc += op->no; |
| 425 | } |
| 426 | } |
| 427 | return (len == 0); |
| 428 | } |
| 429 | |
| 430 | static int valid_cc(const void *bc, int len, int cc) |
| 431 | { |
| 432 | while (len >= 0) { |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 433 | const struct inet_diag_bc_op *op = bc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | |
| 435 | if (cc > len) |
| 436 | return 0; |
| 437 | if (cc == len) |
| 438 | return 1; |
| 439 | if (op->yes < 4) |
| 440 | return 0; |
| 441 | len -= op->yes; |
| 442 | bc += op->yes; |
| 443 | } |
| 444 | return 0; |
| 445 | } |
| 446 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 447 | static int inet_diag_bc_audit(const void *bytecode, int bytecode_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | { |
| 449 | const unsigned char *bc = bytecode; |
| 450 | int len = bytecode_len; |
| 451 | |
| 452 | while (len > 0) { |
Arnaldo Carvalho de Melo | a8c2190 | 2005-08-12 12:56:38 -0300 | [diff] [blame] | 453 | struct inet_diag_bc_op *op = (struct inet_diag_bc_op *)bc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | |
| 455 | //printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len); |
| 456 | switch (op->code) { |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 457 | case INET_DIAG_BC_AUTO: |
| 458 | case INET_DIAG_BC_S_COND: |
| 459 | case INET_DIAG_BC_D_COND: |
| 460 | case INET_DIAG_BC_S_GE: |
| 461 | case INET_DIAG_BC_S_LE: |
| 462 | case INET_DIAG_BC_D_GE: |
| 463 | case INET_DIAG_BC_D_LE: |
Arnaldo Carvalho de Melo | a8c2190 | 2005-08-12 12:56:38 -0300 | [diff] [blame] | 464 | if (op->yes < 4 || op->yes > len + 4) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | return -EINVAL; |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 466 | case INET_DIAG_BC_JMP: |
Arnaldo Carvalho de Melo | a8c2190 | 2005-08-12 12:56:38 -0300 | [diff] [blame] | 467 | if (op->no < 4 || op->no > len + 4) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | return -EINVAL; |
| 469 | if (op->no < len && |
Arnaldo Carvalho de Melo | a8c2190 | 2005-08-12 12:56:38 -0300 | [diff] [blame] | 470 | !valid_cc(bytecode, bytecode_len, len - op->no)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | return -EINVAL; |
| 472 | break; |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 473 | case INET_DIAG_BC_NOP: |
Arnaldo Carvalho de Melo | a8c2190 | 2005-08-12 12:56:38 -0300 | [diff] [blame] | 474 | if (op->yes < 4 || op->yes > len + 4) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | return -EINVAL; |
| 476 | break; |
| 477 | default: |
| 478 | return -EINVAL; |
| 479 | } |
Arnaldo Carvalho de Melo | 4e852c0 | 2006-01-09 14:56:19 -0800 | [diff] [blame] | 480 | bc += op->yes; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | len -= op->yes; |
| 482 | } |
| 483 | return len == 0 ? 0 : -EINVAL; |
| 484 | } |
| 485 | |
Arnaldo Carvalho de Melo | dff2c03 | 2006-01-09 14:56:56 -0800 | [diff] [blame] | 486 | static int inet_csk_diag_dump(struct sock *sk, |
| 487 | struct sk_buff *skb, |
| 488 | struct netlink_callback *cb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | { |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 490 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | |
| 492 | if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) { |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 493 | struct inet_diag_entry entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | struct rtattr *bc = (struct rtattr *)(r + 1); |
| 495 | struct inet_sock *inet = inet_sk(sk); |
| 496 | |
| 497 | entry.family = sk->sk_family; |
Arnaldo Carvalho de Melo | 505cbfc | 2005-08-12 09:19:38 -0300 | [diff] [blame] | 498 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | if (entry.family == AF_INET6) { |
| 500 | struct ipv6_pinfo *np = inet6_sk(sk); |
| 501 | |
| 502 | entry.saddr = np->rcv_saddr.s6_addr32; |
| 503 | entry.daddr = np->daddr.s6_addr32; |
| 504 | } else |
| 505 | #endif |
| 506 | { |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 507 | entry.saddr = &inet->inet_rcv_saddr; |
| 508 | entry.daddr = &inet->inet_daddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | } |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 510 | entry.sport = inet->inet_num; |
| 511 | entry.dport = ntohs(inet->inet_dport); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | entry.userlocks = sk->sk_userlocks; |
| 513 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 514 | if (!inet_diag_bc_run(RTA_DATA(bc), RTA_PAYLOAD(bc), &entry)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | return 0; |
| 516 | } |
| 517 | |
Arnaldo Carvalho de Melo | dff2c03 | 2006-01-09 14:56:56 -0800 | [diff] [blame] | 518 | return inet_csk_diag_fill(sk, skb, r->idiag_ext, |
| 519 | NETLINK_CB(cb->skb).pid, |
| 520 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | } |
| 522 | |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 523 | static int inet_twsk_diag_dump(struct inet_timewait_sock *tw, |
| 524 | struct sk_buff *skb, |
| 525 | struct netlink_callback *cb) |
| 526 | { |
| 527 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); |
| 528 | |
| 529 | if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) { |
| 530 | struct inet_diag_entry entry; |
| 531 | struct rtattr *bc = (struct rtattr *)(r + 1); |
| 532 | |
| 533 | entry.family = tw->tw_family; |
| 534 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
| 535 | if (tw->tw_family == AF_INET6) { |
| 536 | struct inet6_timewait_sock *tw6 = |
| 537 | inet6_twsk((struct sock *)tw); |
| 538 | entry.saddr = tw6->tw_v6_rcv_saddr.s6_addr32; |
| 539 | entry.daddr = tw6->tw_v6_daddr.s6_addr32; |
| 540 | } else |
| 541 | #endif |
| 542 | { |
| 543 | entry.saddr = &tw->tw_rcv_saddr; |
| 544 | entry.daddr = &tw->tw_daddr; |
| 545 | } |
| 546 | entry.sport = tw->tw_num; |
| 547 | entry.dport = ntohs(tw->tw_dport); |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 548 | entry.userlocks = 0; |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 549 | |
| 550 | if (!inet_diag_bc_run(RTA_DATA(bc), RTA_PAYLOAD(bc), &entry)) |
| 551 | return 0; |
| 552 | } |
| 553 | |
| 554 | return inet_twsk_diag_fill(tw, skb, r->idiag_ext, |
| 555 | NETLINK_CB(cb->skb).pid, |
| 556 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); |
| 557 | } |
| 558 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 559 | static int inet_diag_fill_req(struct sk_buff *skb, struct sock *sk, |
Arnaldo Carvalho de Melo | 4e852c0 | 2006-01-09 14:56:19 -0800 | [diff] [blame] | 560 | struct request_sock *req, u32 pid, u32 seq, |
| 561 | const struct nlmsghdr *unlh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | { |
Arnaldo Carvalho de Melo | 2e6599c | 2005-06-18 22:46:52 -0700 | [diff] [blame] | 563 | const struct inet_request_sock *ireq = inet_rsk(req); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | struct inet_sock *inet = inet_sk(sk); |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 565 | unsigned char *b = skb_tail_pointer(skb); |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 566 | struct inet_diag_msg *r; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | struct nlmsghdr *nlh; |
| 568 | long tmo; |
| 569 | |
Arnaldo Carvalho de Melo | 540722f | 2005-08-10 05:54:28 -0300 | [diff] [blame] | 570 | nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | nlh->nlmsg_flags = NLM_F_MULTI; |
| 572 | r = NLMSG_DATA(nlh); |
| 573 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 574 | r->idiag_family = sk->sk_family; |
| 575 | r->idiag_state = TCP_SYN_RECV; |
| 576 | r->idiag_timer = 1; |
| 577 | r->idiag_retrans = req->retrans; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 579 | r->id.idiag_if = sk->sk_bound_dev_if; |
| 580 | r->id.idiag_cookie[0] = (u32)(unsigned long)req; |
| 581 | r->id.idiag_cookie[1] = (u32)(((unsigned long)req >> 31) >> 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | |
| 583 | tmo = req->expires - jiffies; |
| 584 | if (tmo < 0) |
| 585 | tmo = 0; |
| 586 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 587 | r->id.idiag_sport = inet->inet_sport; |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 588 | r->id.idiag_dport = ireq->rmt_port; |
| 589 | r->id.idiag_src[0] = ireq->loc_addr; |
| 590 | r->id.idiag_dst[0] = ireq->rmt_addr; |
| 591 | r->idiag_expires = jiffies_to_msecs(tmo); |
| 592 | r->idiag_rqueue = 0; |
| 593 | r->idiag_wqueue = 0; |
| 594 | r->idiag_uid = sock_i_uid(sk); |
| 595 | r->idiag_inode = 0; |
Arnaldo Carvalho de Melo | 505cbfc | 2005-08-12 09:19:38 -0300 | [diff] [blame] | 596 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 597 | if (r->idiag_family == AF_INET6) { |
| 598 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_src, |
Arnaldo Carvalho de Melo | ca304b6 | 2005-12-13 23:15:40 -0800 | [diff] [blame] | 599 | &inet6_rsk(req)->loc_addr); |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 600 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst, |
Arnaldo Carvalho de Melo | ca304b6 | 2005-12-13 23:15:40 -0800 | [diff] [blame] | 601 | &inet6_rsk(req)->rmt_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | } |
| 603 | #endif |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 604 | nlh->nlmsg_len = skb_tail_pointer(skb) - b; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | |
| 606 | return skb->len; |
| 607 | |
| 608 | nlmsg_failure: |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 609 | nlmsg_trim(skb, b); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | return -1; |
| 611 | } |
| 612 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 613 | static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk, |
Arnaldo Carvalho de Melo | 4e852c0 | 2006-01-09 14:56:19 -0800 | [diff] [blame] | 614 | struct netlink_callback *cb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | { |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 616 | struct inet_diag_entry entry; |
| 617 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 618 | struct inet_connection_sock *icsk = inet_csk(sk); |
Arnaldo Carvalho de Melo | 2ad69c5 | 2005-06-18 22:48:55 -0700 | [diff] [blame] | 619 | struct listen_sock *lopt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | struct rtattr *bc = NULL; |
| 621 | struct inet_sock *inet = inet_sk(sk); |
| 622 | int j, s_j; |
| 623 | int reqnum, s_reqnum; |
| 624 | int err = 0; |
| 625 | |
| 626 | s_j = cb->args[3]; |
| 627 | s_reqnum = cb->args[4]; |
| 628 | |
| 629 | if (s_j > 0) |
| 630 | s_j--; |
| 631 | |
| 632 | entry.family = sk->sk_family; |
| 633 | |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 634 | read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 636 | lopt = icsk->icsk_accept_queue.listen_opt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | if (!lopt || !lopt->qlen) |
| 638 | goto out; |
| 639 | |
| 640 | if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) { |
| 641 | bc = (struct rtattr *)(r + 1); |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 642 | entry.sport = inet->inet_num; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | entry.userlocks = sk->sk_userlocks; |
| 644 | } |
| 645 | |
Arnaldo Carvalho de Melo | 540722f | 2005-08-10 05:54:28 -0300 | [diff] [blame] | 646 | for (j = s_j; j < lopt->nr_table_entries; j++) { |
Arnaldo Carvalho de Melo | 60236fd | 2005-06-18 22:47:21 -0700 | [diff] [blame] | 647 | struct request_sock *req, *head = lopt->syn_table[j]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | |
| 649 | reqnum = 0; |
| 650 | for (req = head; req; reqnum++, req = req->dl_next) { |
Arnaldo Carvalho de Melo | 2e6599c | 2005-06-18 22:46:52 -0700 | [diff] [blame] | 651 | struct inet_request_sock *ireq = inet_rsk(req); |
| 652 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | if (reqnum < s_reqnum) |
| 654 | continue; |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 655 | if (r->id.idiag_dport != ireq->rmt_port && |
| 656 | r->id.idiag_dport) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | continue; |
| 658 | |
| 659 | if (bc) { |
| 660 | entry.saddr = |
Arnaldo Carvalho de Melo | 505cbfc | 2005-08-12 09:19:38 -0300 | [diff] [blame] | 661 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | (entry.family == AF_INET6) ? |
Arnaldo Carvalho de Melo | ca304b6 | 2005-12-13 23:15:40 -0800 | [diff] [blame] | 663 | inet6_rsk(req)->loc_addr.s6_addr32 : |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | #endif |
Arnaldo Carvalho de Melo | 2e6599c | 2005-06-18 22:46:52 -0700 | [diff] [blame] | 665 | &ireq->loc_addr; |
Arnaldo Carvalho de Melo | 4e852c0 | 2006-01-09 14:56:19 -0800 | [diff] [blame] | 666 | entry.daddr = |
Arnaldo Carvalho de Melo | 505cbfc | 2005-08-12 09:19:38 -0300 | [diff] [blame] | 667 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | (entry.family == AF_INET6) ? |
Arnaldo Carvalho de Melo | ca304b6 | 2005-12-13 23:15:40 -0800 | [diff] [blame] | 669 | inet6_rsk(req)->rmt_addr.s6_addr32 : |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | #endif |
Arnaldo Carvalho de Melo | 2e6599c | 2005-06-18 22:46:52 -0700 | [diff] [blame] | 671 | &ireq->rmt_addr; |
| 672 | entry.dport = ntohs(ireq->rmt_port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 673 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 674 | if (!inet_diag_bc_run(RTA_DATA(bc), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | RTA_PAYLOAD(bc), &entry)) |
| 676 | continue; |
| 677 | } |
| 678 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 679 | err = inet_diag_fill_req(skb, sk, req, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | NETLINK_CB(cb->skb).pid, |
Arnaldo Carvalho de Melo | 540722f | 2005-08-10 05:54:28 -0300 | [diff] [blame] | 681 | cb->nlh->nlmsg_seq, cb->nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | if (err < 0) { |
| 683 | cb->args[3] = j + 1; |
| 684 | cb->args[4] = reqnum; |
| 685 | goto out; |
| 686 | } |
| 687 | } |
| 688 | |
| 689 | s_reqnum = 0; |
| 690 | } |
| 691 | |
| 692 | out: |
Arnaldo Carvalho de Melo | 463c84b | 2005-08-09 20:10:42 -0700 | [diff] [blame] | 693 | read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | |
| 695 | return err; |
| 696 | } |
| 697 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 698 | static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 699 | { |
| 700 | int i, num; |
| 701 | int s_i, s_num; |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 702 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 703 | const struct inet_diag_handler *handler; |
Arnaldo Carvalho de Melo | 540722f | 2005-08-10 05:54:28 -0300 | [diff] [blame] | 704 | struct inet_hashinfo *hashinfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 705 | |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 706 | handler = inet_diag_lock_handler(cb->nlh->nlmsg_type); |
Arnaldo Carvalho de Melo | 8cf8e5a | 2008-01-28 20:52:12 -0800 | [diff] [blame] | 707 | if (IS_ERR(handler)) |
| 708 | goto unlock; |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 709 | |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 710 | hashinfo = handler->idiag_hashinfo; |
Arnaldo Carvalho de Melo | 4e852c0 | 2006-01-09 14:56:19 -0800 | [diff] [blame] | 711 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | s_i = cb->args[1]; |
| 713 | s_num = num = cb->args[2]; |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 714 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | if (cb->args[0] == 0) { |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 716 | if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | goto skip_listen_ht; |
Arnaldo Carvalho de Melo | 540722f | 2005-08-10 05:54:28 -0300 | [diff] [blame] | 718 | |
Arnaldo Carvalho de Melo | 0f7ff92 | 2005-08-09 19:59:44 -0700 | [diff] [blame] | 719 | for (i = s_i; i < INET_LHTABLE_SIZE; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | struct sock *sk; |
Eric Dumazet | c25eb3b | 2008-11-23 17:22:55 -0800 | [diff] [blame] | 721 | struct hlist_nulls_node *node; |
Eric Dumazet | 5caea4e | 2008-11-20 00:40:07 -0800 | [diff] [blame] | 722 | struct inet_listen_hashbucket *ilb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | |
| 724 | num = 0; |
Eric Dumazet | 5caea4e | 2008-11-20 00:40:07 -0800 | [diff] [blame] | 725 | ilb = &hashinfo->listening_hash[i]; |
| 726 | spin_lock_bh(&ilb->lock); |
Eric Dumazet | c25eb3b | 2008-11-23 17:22:55 -0800 | [diff] [blame] | 727 | sk_nulls_for_each(sk, node, &ilb->head) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | struct inet_sock *inet = inet_sk(sk); |
| 729 | |
| 730 | if (num < s_num) { |
| 731 | num++; |
| 732 | continue; |
| 733 | } |
| 734 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 735 | if (r->id.idiag_sport != inet->inet_sport && |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 736 | r->id.idiag_sport) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | goto next_listen; |
| 738 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 739 | if (!(r->idiag_states & TCPF_LISTEN) || |
| 740 | r->id.idiag_dport || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | cb->args[3] > 0) |
| 742 | goto syn_recv; |
| 743 | |
Arnaldo Carvalho de Melo | dff2c03 | 2006-01-09 14:56:56 -0800 | [diff] [blame] | 744 | if (inet_csk_diag_dump(sk, skb, cb) < 0) { |
Eric Dumazet | 5caea4e | 2008-11-20 00:40:07 -0800 | [diff] [blame] | 745 | spin_unlock_bh(&ilb->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | goto done; |
| 747 | } |
| 748 | |
| 749 | syn_recv: |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 750 | if (!(r->idiag_states & TCPF_SYN_RECV)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | goto next_listen; |
| 752 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 753 | if (inet_diag_dump_reqs(skb, sk, cb) < 0) { |
Eric Dumazet | 5caea4e | 2008-11-20 00:40:07 -0800 | [diff] [blame] | 754 | spin_unlock_bh(&ilb->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | goto done; |
| 756 | } |
| 757 | |
| 758 | next_listen: |
| 759 | cb->args[3] = 0; |
| 760 | cb->args[4] = 0; |
| 761 | ++num; |
| 762 | } |
Eric Dumazet | 5caea4e | 2008-11-20 00:40:07 -0800 | [diff] [blame] | 763 | spin_unlock_bh(&ilb->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | |
| 765 | s_num = 0; |
| 766 | cb->args[3] = 0; |
| 767 | cb->args[4] = 0; |
| 768 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | skip_listen_ht: |
| 770 | cb->args[0] = 1; |
| 771 | s_i = num = s_num = 0; |
| 772 | } |
| 773 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 774 | if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV))) |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 775 | goto unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | |
Eric Dumazet | f373b53 | 2009-10-09 00:16:19 +0000 | [diff] [blame] | 777 | for (i = s_i; i <= hashinfo->ehash_mask; i++) { |
Arnaldo Carvalho de Melo | 540722f | 2005-08-10 05:54:28 -0300 | [diff] [blame] | 778 | struct inet_ehash_bucket *head = &hashinfo->ehash[i]; |
David S. Miller | 7e3aab4 | 2008-11-21 16:39:19 -0800 | [diff] [blame] | 779 | spinlock_t *lock = inet_ehash_lockp(hashinfo, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | struct sock *sk; |
Eric Dumazet | 3ab5aee | 2008-11-16 19:40:17 -0800 | [diff] [blame] | 781 | struct hlist_nulls_node *node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | |
Andi Kleen | 6be547a | 2008-08-28 01:09:54 -0700 | [diff] [blame] | 783 | num = 0; |
| 784 | |
Eric Dumazet | 3ab5aee | 2008-11-16 19:40:17 -0800 | [diff] [blame] | 785 | if (hlist_nulls_empty(&head->chain) && |
| 786 | hlist_nulls_empty(&head->twchain)) |
Andi Kleen | 6be547a | 2008-08-28 01:09:54 -0700 | [diff] [blame] | 787 | continue; |
| 788 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | if (i > s_i) |
| 790 | s_num = 0; |
| 791 | |
David S. Miller | 7e3aab4 | 2008-11-21 16:39:19 -0800 | [diff] [blame] | 792 | spin_lock_bh(lock); |
Eric Dumazet | 3ab5aee | 2008-11-16 19:40:17 -0800 | [diff] [blame] | 793 | sk_nulls_for_each(sk, node, &head->chain) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | struct inet_sock *inet = inet_sk(sk); |
| 795 | |
| 796 | if (num < s_num) |
| 797 | goto next_normal; |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 798 | if (!(r->idiag_states & (1 << sk->sk_state))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 799 | goto next_normal; |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 800 | if (r->id.idiag_sport != inet->inet_sport && |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 801 | r->id.idiag_sport) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | goto next_normal; |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 803 | if (r->id.idiag_dport != inet->inet_dport && |
Arnaldo Carvalho de Melo | 4e852c0 | 2006-01-09 14:56:19 -0800 | [diff] [blame] | 804 | r->id.idiag_dport) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | goto next_normal; |
Arnaldo Carvalho de Melo | dff2c03 | 2006-01-09 14:56:56 -0800 | [diff] [blame] | 806 | if (inet_csk_diag_dump(sk, skb, cb) < 0) { |
David S. Miller | 7e3aab4 | 2008-11-21 16:39:19 -0800 | [diff] [blame] | 807 | spin_unlock_bh(lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | goto done; |
| 809 | } |
| 810 | next_normal: |
| 811 | ++num; |
| 812 | } |
| 813 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 814 | if (r->idiag_states & TCPF_TIME_WAIT) { |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 815 | struct inet_timewait_sock *tw; |
| 816 | |
| 817 | inet_twsk_for_each(tw, node, |
Eric Dumazet | dbca9b275 | 2007-02-08 14:16:46 -0800 | [diff] [blame] | 818 | &head->twchain) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | |
| 820 | if (num < s_num) |
| 821 | goto next_dying; |
Arnaldo Carvalho de Melo | 7dbf075 | 2006-01-09 14:56:03 -0800 | [diff] [blame] | 822 | if (r->id.idiag_sport != tw->tw_sport && |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 823 | r->id.idiag_sport) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | goto next_dying; |
Arnaldo Carvalho de Melo | 7dbf075 | 2006-01-09 14:56:03 -0800 | [diff] [blame] | 825 | if (r->id.idiag_dport != tw->tw_dport && |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 826 | r->id.idiag_dport) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | goto next_dying; |
Arnaldo Carvalho de Melo | c7d58aa | 2006-01-09 14:56:38 -0800 | [diff] [blame] | 828 | if (inet_twsk_diag_dump(tw, skb, cb) < 0) { |
David S. Miller | 7e3aab4 | 2008-11-21 16:39:19 -0800 | [diff] [blame] | 829 | spin_unlock_bh(lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | goto done; |
| 831 | } |
| 832 | next_dying: |
| 833 | ++num; |
| 834 | } |
| 835 | } |
David S. Miller | 7e3aab4 | 2008-11-21 16:39:19 -0800 | [diff] [blame] | 836 | spin_unlock_bh(lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | } |
| 838 | |
| 839 | done: |
| 840 | cb->args[1] = i; |
| 841 | cb->args[2] = num; |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 842 | unlock: |
| 843 | inet_diag_unlock_handler(handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 844 | return skb->len; |
| 845 | } |
| 846 | |
Thomas Graf | ead592b | 2007-03-22 23:30:35 -0700 | [diff] [blame] | 847 | static int inet_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | { |
Thomas Graf | ead592b | 2007-03-22 23:30:35 -0700 | [diff] [blame] | 849 | int hdrlen = sizeof(struct inet_diag_req); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 850 | |
Thomas Graf | ead592b | 2007-03-22 23:30:35 -0700 | [diff] [blame] | 851 | if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX || |
| 852 | nlmsg_len(nlh) < hdrlen) |
| 853 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 854 | |
Thomas Graf | ead592b | 2007-03-22 23:30:35 -0700 | [diff] [blame] | 855 | if (nlh->nlmsg_flags & NLM_F_DUMP) { |
Thomas Graf | ead592b | 2007-03-22 23:30:35 -0700 | [diff] [blame] | 856 | if (nlmsg_attrlen(nlh, hdrlen)) { |
| 857 | struct nlattr *attr; |
| 858 | |
| 859 | attr = nlmsg_find_attr(nlh, hdrlen, |
| 860 | INET_DIAG_REQ_BYTECODE); |
| 861 | if (attr == NULL || |
| 862 | nla_len(attr) < sizeof(struct inet_diag_bc_op) || |
| 863 | inet_diag_bc_audit(nla_data(attr), nla_len(attr))) |
| 864 | return -EINVAL; |
| 865 | } |
| 866 | |
Thomas Graf | c702e80 | 2007-03-22 23:30:55 -0700 | [diff] [blame] | 867 | return netlink_dump_start(idiagnl, skb, nlh, |
| 868 | inet_diag_dump, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | } |
Thomas Graf | ead592b | 2007-03-22 23:30:35 -0700 | [diff] [blame] | 870 | |
| 871 | return inet_diag_get_exact(skb, nlh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | } |
| 873 | |
Patrick McHardy | 0a9c730 | 2007-09-11 11:33:28 +0200 | [diff] [blame] | 874 | static DEFINE_MUTEX(inet_diag_mutex); |
| 875 | |
Denis V. Lunev | cd40b7d | 2007-10-10 21:15:29 -0700 | [diff] [blame] | 876 | static void inet_diag_rcv(struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 877 | { |
Denis V. Lunev | cd40b7d | 2007-10-10 21:15:29 -0700 | [diff] [blame] | 878 | mutex_lock(&inet_diag_mutex); |
| 879 | netlink_rcv_skb(skb, &inet_diag_rcv_msg); |
| 880 | mutex_unlock(&inet_diag_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | } |
| 882 | |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 883 | int inet_diag_register(const struct inet_diag_handler *h) |
| 884 | { |
| 885 | const __u16 type = h->idiag_type; |
| 886 | int err = -EINVAL; |
| 887 | |
| 888 | if (type >= INET_DIAG_GETSOCK_MAX) |
| 889 | goto out; |
| 890 | |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 891 | mutex_lock(&inet_diag_table_mutex); |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 892 | err = -EEXIST; |
| 893 | if (inet_diag_table[type] == NULL) { |
| 894 | inet_diag_table[type] = h; |
| 895 | err = 0; |
| 896 | } |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 897 | mutex_unlock(&inet_diag_table_mutex); |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 898 | out: |
| 899 | return err; |
| 900 | } |
| 901 | EXPORT_SYMBOL_GPL(inet_diag_register); |
| 902 | |
| 903 | void inet_diag_unregister(const struct inet_diag_handler *h) |
| 904 | { |
| 905 | const __u16 type = h->idiag_type; |
| 906 | |
| 907 | if (type >= INET_DIAG_GETSOCK_MAX) |
| 908 | return; |
| 909 | |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 910 | mutex_lock(&inet_diag_table_mutex); |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 911 | inet_diag_table[type] = NULL; |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 912 | mutex_unlock(&inet_diag_table_mutex); |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 913 | } |
| 914 | EXPORT_SYMBOL_GPL(inet_diag_unregister); |
| 915 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 916 | static int __init inet_diag_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | { |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 918 | const int inet_diag_table_size = (INET_DIAG_GETSOCK_MAX * |
| 919 | sizeof(struct inet_diag_handler *)); |
| 920 | int err = -ENOMEM; |
| 921 | |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 922 | inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL); |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 923 | if (!inet_diag_table) |
| 924 | goto out; |
| 925 | |
Eric W. Biederman | b4b5102 | 2007-09-12 13:05:38 +0200 | [diff] [blame] | 926 | idiagnl = netlink_kernel_create(&init_net, NETLINK_INET_DIAG, 0, |
Herbert Xu | d523a32 | 2007-12-03 15:51:25 +1100 | [diff] [blame] | 927 | inet_diag_rcv, NULL, THIS_MODULE); |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 928 | if (idiagnl == NULL) |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 929 | goto out_free_table; |
Arnaldo Carvalho de Melo | 17b085e | 2005-08-12 12:59:17 -0300 | [diff] [blame] | 930 | err = 0; |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 931 | out: |
| 932 | return err; |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 933 | out_free_table: |
| 934 | kfree(inet_diag_table); |
| 935 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | } |
| 937 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 938 | static void __exit inet_diag_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | { |
Denis V. Lunev | b7c6ba6 | 2008-01-28 14:41:19 -0800 | [diff] [blame] | 940 | netlink_kernel_release(idiagnl); |
Arnaldo Carvalho de Melo | 4f5736c | 2005-08-12 09:27:49 -0300 | [diff] [blame] | 941 | kfree(inet_diag_table); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 942 | } |
| 943 | |
Arnaldo Carvalho de Melo | 73c1f4a | 2005-08-12 12:51:49 -0300 | [diff] [blame] | 944 | module_init(inet_diag_init); |
| 945 | module_exit(inet_diag_exit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 946 | MODULE_LICENSE("GPL"); |
Jean Delvare | 305e1e9 | 2007-10-21 16:44:04 -0700 | [diff] [blame] | 947 | MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_INET_DIAG); |