2 * inet_diag.c Module for monitoring INET transport protocols sockets.
4 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
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.
12 #include <linux/kernel.h>
13 #include <linux/module.h>
14 #include <linux/types.h>
15 #include <linux/fcntl.h>
16 #include <linux/random.h>
17 #include <linux/slab.h>
18 #include <linux/cache.h>
19 #include <linux/init.h>
20 #include <linux/time.h>
25 #include <net/inet_common.h>
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>
30 #include <net/netlink.h>
32 #include <linux/inet.h>
33 #include <linux/stddef.h>
35 #include <linux/inet_diag.h>
37 static const struct inet_diag_handler **inet_diag_table;
39 struct inet_diag_entry {
48 static struct sock *sdiagnl;
50 #define INET_DIAG_PUT(skb, attrtype, attrlen) \
51 RTA_DATA(__RTA_PUT(skb, attrtype, attrlen))
53 static DEFINE_MUTEX(inet_diag_table_mutex);
55 static const struct inet_diag_handler *inet_diag_lock_handler(int type)
57 if (!inet_diag_table[type])
58 request_module("net-pf-%d-proto-%d-type-%d", PF_NETLINK,
59 NETLINK_SOCK_DIAG, type);
61 mutex_lock(&inet_diag_table_mutex);
62 if (!inet_diag_table[type])
63 return ERR_PTR(-ENOENT);
65 return inet_diag_table[type];
68 static inline void inet_diag_unlock_handler(
69 const struct inet_diag_handler *handler)
71 mutex_unlock(&inet_diag_table_mutex);
74 static int inet_csk_diag_fill(struct sock *sk,
76 int ext, u32 pid, u32 seq, u16 nlmsg_flags,
77 const struct nlmsghdr *unlh)
79 const struct inet_sock *inet = inet_sk(sk);
80 const struct inet_connection_sock *icsk = inet_csk(sk);
81 struct inet_diag_msg *r;
84 struct inet_diag_meminfo *minfo = NULL;
85 unsigned char *b = skb_tail_pointer(skb);
86 const struct inet_diag_handler *handler;
88 handler = inet_diag_table[unlh->nlmsg_type];
89 BUG_ON(handler == NULL);
91 nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r));
92 nlh->nlmsg_flags = nlmsg_flags;
95 BUG_ON(sk->sk_state == TCP_TIME_WAIT);
97 if (ext & (1 << (INET_DIAG_MEMINFO - 1)))
98 minfo = INET_DIAG_PUT(skb, INET_DIAG_MEMINFO, sizeof(*minfo));
100 if (ext & (1 << (INET_DIAG_INFO - 1)))
101 info = INET_DIAG_PUT(skb, INET_DIAG_INFO,
102 handler->idiag_info_size);
104 if ((ext & (1 << (INET_DIAG_CONG - 1))) && icsk->icsk_ca_ops) {
105 const size_t len = strlen(icsk->icsk_ca_ops->name);
107 strcpy(INET_DIAG_PUT(skb, INET_DIAG_CONG, len + 1),
108 icsk->icsk_ca_ops->name);
111 r->idiag_family = sk->sk_family;
112 r->idiag_state = sk->sk_state;
114 r->idiag_retrans = 0;
116 r->id.idiag_if = sk->sk_bound_dev_if;
117 r->id.idiag_cookie[0] = (u32)(unsigned long)sk;
118 r->id.idiag_cookie[1] = (u32)(((unsigned long)sk >> 31) >> 1);
120 r->id.idiag_sport = inet->inet_sport;
121 r->id.idiag_dport = inet->inet_dport;
122 r->id.idiag_src[0] = inet->inet_rcv_saddr;
123 r->id.idiag_dst[0] = inet->inet_daddr;
125 /* IPv6 dual-stack sockets use inet->tos for IPv4 connections,
126 * hence this needs to be included regardless of socket family.
128 if (ext & (1 << (INET_DIAG_TOS - 1)))
129 RTA_PUT_U8(skb, INET_DIAG_TOS, inet->tos);
131 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
132 if (r->idiag_family == AF_INET6) {
133 const struct ipv6_pinfo *np = inet6_sk(sk);
135 *(struct in6_addr *)r->id.idiag_src = np->rcv_saddr;
136 *(struct in6_addr *)r->id.idiag_dst = np->daddr;
137 if (ext & (1 << (INET_DIAG_TCLASS - 1)))
138 RTA_PUT_U8(skb, INET_DIAG_TCLASS, np->tclass);
142 #define EXPIRES_IN_MS(tmo) DIV_ROUND_UP((tmo - jiffies) * 1000, HZ)
144 if (icsk->icsk_pending == ICSK_TIME_RETRANS) {
146 r->idiag_retrans = icsk->icsk_retransmits;
147 r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
148 } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) {
150 r->idiag_retrans = icsk->icsk_probes_out;
151 r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
152 } else if (timer_pending(&sk->sk_timer)) {
154 r->idiag_retrans = icsk->icsk_probes_out;
155 r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires);
158 r->idiag_expires = 0;
162 r->idiag_uid = sock_i_uid(sk);
163 r->idiag_inode = sock_i_ino(sk);
166 minfo->idiag_rmem = sk_rmem_alloc_get(sk);
167 minfo->idiag_wmem = sk->sk_wmem_queued;
168 minfo->idiag_fmem = sk->sk_forward_alloc;
169 minfo->idiag_tmem = sk_wmem_alloc_get(sk);
172 handler->idiag_get_info(sk, r, info);
174 if (sk->sk_state < TCP_TIME_WAIT &&
175 icsk->icsk_ca_ops && icsk->icsk_ca_ops->get_info)
176 icsk->icsk_ca_ops->get_info(sk, ext, skb);
178 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
187 static int inet_twsk_diag_fill(struct inet_timewait_sock *tw,
188 struct sk_buff *skb, int ext, u32 pid,
189 u32 seq, u16 nlmsg_flags,
190 const struct nlmsghdr *unlh)
193 struct inet_diag_msg *r;
194 const unsigned char *previous_tail = skb_tail_pointer(skb);
195 struct nlmsghdr *nlh = NLMSG_PUT(skb, pid, seq,
196 unlh->nlmsg_type, sizeof(*r));
199 BUG_ON(tw->tw_state != TCP_TIME_WAIT);
201 nlh->nlmsg_flags = nlmsg_flags;
203 tmo = tw->tw_ttd - jiffies;
207 r->idiag_family = tw->tw_family;
208 r->idiag_retrans = 0;
209 r->id.idiag_if = tw->tw_bound_dev_if;
210 r->id.idiag_cookie[0] = (u32)(unsigned long)tw;
211 r->id.idiag_cookie[1] = (u32)(((unsigned long)tw >> 31) >> 1);
212 r->id.idiag_sport = tw->tw_sport;
213 r->id.idiag_dport = tw->tw_dport;
214 r->id.idiag_src[0] = tw->tw_rcv_saddr;
215 r->id.idiag_dst[0] = tw->tw_daddr;
216 r->idiag_state = tw->tw_substate;
218 r->idiag_expires = DIV_ROUND_UP(tmo * 1000, HZ);
223 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
224 if (tw->tw_family == AF_INET6) {
225 const struct inet6_timewait_sock *tw6 =
226 inet6_twsk((struct sock *)tw);
228 *(struct in6_addr *)r->id.idiag_src = tw6->tw_v6_rcv_saddr;
229 *(struct in6_addr *)r->id.idiag_dst = tw6->tw_v6_daddr;
232 nlh->nlmsg_len = skb_tail_pointer(skb) - previous_tail;
235 nlmsg_trim(skb, previous_tail);
239 static int sk_diag_fill(struct sock *sk, struct sk_buff *skb,
240 int ext, u32 pid, u32 seq, u16 nlmsg_flags,
241 const struct nlmsghdr *unlh)
243 if (sk->sk_state == TCP_TIME_WAIT)
244 return inet_twsk_diag_fill((struct inet_timewait_sock *)sk,
245 skb, ext, pid, seq, nlmsg_flags,
247 return inet_csk_diag_fill(sk, skb, ext, pid, seq, nlmsg_flags, unlh);
250 static int inet_diag_get_exact(struct sk_buff *in_skb,
251 const struct nlmsghdr *nlh)
255 struct inet_diag_req *req = NLMSG_DATA(nlh);
257 struct inet_hashinfo *hashinfo;
258 const struct inet_diag_handler *handler;
260 handler = inet_diag_lock_handler(nlh->nlmsg_type);
261 if (IS_ERR(handler)) {
262 err = PTR_ERR(handler);
266 hashinfo = handler->idiag_hashinfo;
269 if (req->idiag_family == AF_INET) {
270 sk = inet_lookup(&init_net, hashinfo, req->id.idiag_dst[0],
271 req->id.idiag_dport, req->id.idiag_src[0],
272 req->id.idiag_sport, req->id.idiag_if);
274 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
275 else if (req->idiag_family == AF_INET6) {
276 sk = inet6_lookup(&init_net, hashinfo,
277 (struct in6_addr *)req->id.idiag_dst,
279 (struct in6_addr *)req->id.idiag_src,
293 if ((req->id.idiag_cookie[0] != INET_DIAG_NOCOOKIE ||
294 req->id.idiag_cookie[1] != INET_DIAG_NOCOOKIE) &&
295 ((u32)(unsigned long)sk != req->id.idiag_cookie[0] ||
296 (u32)((((unsigned long)sk) >> 31) >> 1) != req->id.idiag_cookie[1]))
300 rep = alloc_skb(NLMSG_SPACE((sizeof(struct inet_diag_msg) +
301 sizeof(struct inet_diag_meminfo) +
302 handler->idiag_info_size + 64)),
307 err = sk_diag_fill(sk, rep, req->idiag_ext,
308 NETLINK_CB(in_skb).pid,
309 nlh->nlmsg_seq, 0, nlh);
311 WARN_ON(err == -EMSGSIZE);
315 err = netlink_unicast(sdiagnl, rep, NETLINK_CB(in_skb).pid,
322 if (sk->sk_state == TCP_TIME_WAIT)
323 inet_twsk_put((struct inet_timewait_sock *)sk);
328 inet_diag_unlock_handler(handler);
332 static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits)
334 int words = bits >> 5;
339 if (memcmp(a1, a2, words << 2))
349 mask = htonl((0xffffffff) << (32 - bits));
351 if ((w1 ^ w2) & mask)
359 static int inet_diag_bc_run(const void *bc, int len,
360 const struct inet_diag_entry *entry)
364 const struct inet_diag_bc_op *op = bc;
367 case INET_DIAG_BC_NOP:
369 case INET_DIAG_BC_JMP:
372 case INET_DIAG_BC_S_GE:
373 yes = entry->sport >= op[1].no;
375 case INET_DIAG_BC_S_LE:
376 yes = entry->sport <= op[1].no;
378 case INET_DIAG_BC_D_GE:
379 yes = entry->dport >= op[1].no;
381 case INET_DIAG_BC_D_LE:
382 yes = entry->dport <= op[1].no;
384 case INET_DIAG_BC_AUTO:
385 yes = !(entry->userlocks & SOCK_BINDPORT_LOCK);
387 case INET_DIAG_BC_S_COND:
388 case INET_DIAG_BC_D_COND: {
389 struct inet_diag_hostcond *cond;
392 cond = (struct inet_diag_hostcond *)(op + 1);
393 if (cond->port != -1 &&
394 cond->port != (op->code == INET_DIAG_BC_S_COND ?
395 entry->sport : entry->dport)) {
400 if (cond->prefix_len == 0)
403 if (op->code == INET_DIAG_BC_S_COND)
408 if (bitstring_match(addr, cond->addr,
411 if (entry->family == AF_INET6 &&
412 cond->family == AF_INET) {
413 if (addr[0] == 0 && addr[1] == 0 &&
414 addr[2] == htonl(0xffff) &&
415 bitstring_match(addr + 3, cond->addr,
435 static int valid_cc(const void *bc, int len, int cc)
438 const struct inet_diag_bc_op *op = bc;
444 if (op->yes < 4 || op->yes & 3)
452 static int inet_diag_bc_audit(const void *bytecode, int bytecode_len)
454 const void *bc = bytecode;
455 int len = bytecode_len;
458 const struct inet_diag_bc_op *op = bc;
460 //printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len);
462 case INET_DIAG_BC_AUTO:
463 case INET_DIAG_BC_S_COND:
464 case INET_DIAG_BC_D_COND:
465 case INET_DIAG_BC_S_GE:
466 case INET_DIAG_BC_S_LE:
467 case INET_DIAG_BC_D_GE:
468 case INET_DIAG_BC_D_LE:
469 case INET_DIAG_BC_JMP:
470 if (op->no < 4 || op->no > len + 4 || op->no & 3)
473 !valid_cc(bytecode, bytecode_len, len - op->no))
476 case INET_DIAG_BC_NOP:
481 if (op->yes < 4 || op->yes > len + 4 || op->yes & 3)
486 return len == 0 ? 0 : -EINVAL;
489 static int inet_csk_diag_dump(struct sock *sk,
491 struct netlink_callback *cb)
493 struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
495 if (nlmsg_attrlen(cb->nlh, sizeof(*r))) {
496 struct inet_diag_entry entry;
497 const struct nlattr *bc = nlmsg_find_attr(cb->nlh,
499 INET_DIAG_REQ_BYTECODE);
500 struct inet_sock *inet = inet_sk(sk);
502 entry.family = sk->sk_family;
503 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
504 if (entry.family == AF_INET6) {
505 struct ipv6_pinfo *np = inet6_sk(sk);
507 entry.saddr = np->rcv_saddr.s6_addr32;
508 entry.daddr = np->daddr.s6_addr32;
512 entry.saddr = &inet->inet_rcv_saddr;
513 entry.daddr = &inet->inet_daddr;
515 entry.sport = inet->inet_num;
516 entry.dport = ntohs(inet->inet_dport);
517 entry.userlocks = sk->sk_userlocks;
519 if (!inet_diag_bc_run(nla_data(bc), nla_len(bc), &entry))
523 return inet_csk_diag_fill(sk, skb, r->idiag_ext,
524 NETLINK_CB(cb->skb).pid,
525 cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh);
528 static int inet_twsk_diag_dump(struct inet_timewait_sock *tw,
530 struct netlink_callback *cb)
532 struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
534 if (nlmsg_attrlen(cb->nlh, sizeof(*r))) {
535 struct inet_diag_entry entry;
536 const struct nlattr *bc = nlmsg_find_attr(cb->nlh,
538 INET_DIAG_REQ_BYTECODE);
540 entry.family = tw->tw_family;
541 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
542 if (tw->tw_family == AF_INET6) {
543 struct inet6_timewait_sock *tw6 =
544 inet6_twsk((struct sock *)tw);
545 entry.saddr = tw6->tw_v6_rcv_saddr.s6_addr32;
546 entry.daddr = tw6->tw_v6_daddr.s6_addr32;
550 entry.saddr = &tw->tw_rcv_saddr;
551 entry.daddr = &tw->tw_daddr;
553 entry.sport = tw->tw_num;
554 entry.dport = ntohs(tw->tw_dport);
557 if (!inet_diag_bc_run(nla_data(bc), nla_len(bc), &entry))
561 return inet_twsk_diag_fill(tw, skb, r->idiag_ext,
562 NETLINK_CB(cb->skb).pid,
563 cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh);
566 static int inet_diag_fill_req(struct sk_buff *skb, struct sock *sk,
567 struct request_sock *req, u32 pid, u32 seq,
568 const struct nlmsghdr *unlh)
570 const struct inet_request_sock *ireq = inet_rsk(req);
571 struct inet_sock *inet = inet_sk(sk);
572 unsigned char *b = skb_tail_pointer(skb);
573 struct inet_diag_msg *r;
574 struct nlmsghdr *nlh;
577 nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r));
578 nlh->nlmsg_flags = NLM_F_MULTI;
581 r->idiag_family = sk->sk_family;
582 r->idiag_state = TCP_SYN_RECV;
584 r->idiag_retrans = req->retrans;
586 r->id.idiag_if = sk->sk_bound_dev_if;
587 r->id.idiag_cookie[0] = (u32)(unsigned long)req;
588 r->id.idiag_cookie[1] = (u32)(((unsigned long)req >> 31) >> 1);
590 tmo = req->expires - jiffies;
594 r->id.idiag_sport = inet->inet_sport;
595 r->id.idiag_dport = ireq->rmt_port;
596 r->id.idiag_src[0] = ireq->loc_addr;
597 r->id.idiag_dst[0] = ireq->rmt_addr;
598 r->idiag_expires = jiffies_to_msecs(tmo);
601 r->idiag_uid = sock_i_uid(sk);
603 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
604 if (r->idiag_family == AF_INET6) {
605 *(struct in6_addr *)r->id.idiag_src = inet6_rsk(req)->loc_addr;
606 *(struct in6_addr *)r->id.idiag_dst = inet6_rsk(req)->rmt_addr;
609 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
618 static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk,
619 struct netlink_callback *cb)
621 struct inet_diag_entry entry;
622 struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
623 struct inet_connection_sock *icsk = inet_csk(sk);
624 struct listen_sock *lopt;
625 const struct nlattr *bc = NULL;
626 struct inet_sock *inet = inet_sk(sk);
628 int reqnum, s_reqnum;
632 s_reqnum = cb->args[4];
637 entry.family = sk->sk_family;
639 read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
641 lopt = icsk->icsk_accept_queue.listen_opt;
642 if (!lopt || !lopt->qlen)
645 if (nlmsg_attrlen(cb->nlh, sizeof(*r))) {
646 bc = nlmsg_find_attr(cb->nlh, sizeof(*r),
647 INET_DIAG_REQ_BYTECODE);
648 entry.sport = inet->inet_num;
649 entry.userlocks = sk->sk_userlocks;
652 for (j = s_j; j < lopt->nr_table_entries; j++) {
653 struct request_sock *req, *head = lopt->syn_table[j];
656 for (req = head; req; reqnum++, req = req->dl_next) {
657 struct inet_request_sock *ireq = inet_rsk(req);
659 if (reqnum < s_reqnum)
661 if (r->id.idiag_dport != ireq->rmt_port &&
667 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
668 (entry.family == AF_INET6) ?
669 inet6_rsk(req)->loc_addr.s6_addr32 :
673 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
674 (entry.family == AF_INET6) ?
675 inet6_rsk(req)->rmt_addr.s6_addr32 :
678 entry.dport = ntohs(ireq->rmt_port);
680 if (!inet_diag_bc_run(nla_data(bc),
681 nla_len(bc), &entry))
685 err = inet_diag_fill_req(skb, sk, req,
686 NETLINK_CB(cb->skb).pid,
687 cb->nlh->nlmsg_seq, cb->nlh);
690 cb->args[4] = reqnum;
699 read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
704 static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
708 struct inet_diag_req *r = NLMSG_DATA(cb->nlh);
709 const struct inet_diag_handler *handler;
710 struct inet_hashinfo *hashinfo;
712 handler = inet_diag_lock_handler(cb->nlh->nlmsg_type);
716 hashinfo = handler->idiag_hashinfo;
719 s_num = num = cb->args[2];
721 if (cb->args[0] == 0) {
722 if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV)))
725 for (i = s_i; i < INET_LHTABLE_SIZE; i++) {
727 struct hlist_nulls_node *node;
728 struct inet_listen_hashbucket *ilb;
731 ilb = &hashinfo->listening_hash[i];
732 spin_lock_bh(&ilb->lock);
733 sk_nulls_for_each(sk, node, &ilb->head) {
734 struct inet_sock *inet = inet_sk(sk);
741 if (r->id.idiag_sport != inet->inet_sport &&
745 if (!(r->idiag_states & TCPF_LISTEN) ||
750 if (inet_csk_diag_dump(sk, skb, cb) < 0) {
751 spin_unlock_bh(&ilb->lock);
756 if (!(r->idiag_states & TCPF_SYN_RECV))
759 if (inet_diag_dump_reqs(skb, sk, cb) < 0) {
760 spin_unlock_bh(&ilb->lock);
769 spin_unlock_bh(&ilb->lock);
777 s_i = num = s_num = 0;
780 if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV)))
783 for (i = s_i; i <= hashinfo->ehash_mask; i++) {
784 struct inet_ehash_bucket *head = &hashinfo->ehash[i];
785 spinlock_t *lock = inet_ehash_lockp(hashinfo, i);
787 struct hlist_nulls_node *node;
791 if (hlist_nulls_empty(&head->chain) &&
792 hlist_nulls_empty(&head->twchain))
799 sk_nulls_for_each(sk, node, &head->chain) {
800 struct inet_sock *inet = inet_sk(sk);
804 if (!(r->idiag_states & (1 << sk->sk_state)))
806 if (r->id.idiag_sport != inet->inet_sport &&
809 if (r->id.idiag_dport != inet->inet_dport &&
812 if (inet_csk_diag_dump(sk, skb, cb) < 0) {
813 spin_unlock_bh(lock);
820 if (r->idiag_states & TCPF_TIME_WAIT) {
821 struct inet_timewait_sock *tw;
823 inet_twsk_for_each(tw, node,
828 if (r->id.idiag_sport != tw->tw_sport &&
831 if (r->id.idiag_dport != tw->tw_dport &&
834 if (inet_twsk_diag_dump(tw, skb, cb) < 0) {
835 spin_unlock_bh(lock);
842 spin_unlock_bh(lock);
849 inet_diag_unlock_handler(handler);
853 static int inet_diag_rcv_msg_compat(struct sk_buff *skb, struct nlmsghdr *nlh)
855 int hdrlen = sizeof(struct inet_diag_req);
857 if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX ||
858 nlmsg_len(nlh) < hdrlen)
861 if (nlh->nlmsg_flags & NLM_F_DUMP) {
862 if (nlmsg_attrlen(nlh, hdrlen)) {
865 attr = nlmsg_find_attr(nlh, hdrlen,
866 INET_DIAG_REQ_BYTECODE);
868 nla_len(attr) < sizeof(struct inet_diag_bc_op) ||
869 inet_diag_bc_audit(nla_data(attr), nla_len(attr)))
873 return netlink_dump_start(sdiagnl, skb, nlh,
874 inet_diag_dump, NULL, 0);
877 return inet_diag_get_exact(skb, nlh);
880 static int __sock_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
885 static int sock_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
887 switch (nlh->nlmsg_type) {
888 case TCPDIAG_GETSOCK:
889 case DCCPDIAG_GETSOCK:
890 return inet_diag_rcv_msg_compat(skb, nlh);
891 case SOCK_DIAG_BY_FAMILY:
892 return __sock_diag_rcv_msg(skb, nlh);
898 static DEFINE_MUTEX(sock_diag_mutex);
900 static void sock_diag_rcv(struct sk_buff *skb)
902 mutex_lock(&sock_diag_mutex);
903 netlink_rcv_skb(skb, &sock_diag_rcv_msg);
904 mutex_unlock(&sock_diag_mutex);
907 int inet_diag_register(const struct inet_diag_handler *h)
909 const __u16 type = h->idiag_type;
912 if (type >= INET_DIAG_GETSOCK_MAX)
915 mutex_lock(&inet_diag_table_mutex);
917 if (inet_diag_table[type] == NULL) {
918 inet_diag_table[type] = h;
921 mutex_unlock(&inet_diag_table_mutex);
925 EXPORT_SYMBOL_GPL(inet_diag_register);
927 void inet_diag_unregister(const struct inet_diag_handler *h)
929 const __u16 type = h->idiag_type;
931 if (type >= INET_DIAG_GETSOCK_MAX)
934 mutex_lock(&inet_diag_table_mutex);
935 inet_diag_table[type] = NULL;
936 mutex_unlock(&inet_diag_table_mutex);
938 EXPORT_SYMBOL_GPL(inet_diag_unregister);
940 static int __init inet_diag_init(void)
942 const int inet_diag_table_size = (INET_DIAG_GETSOCK_MAX *
943 sizeof(struct inet_diag_handler *));
946 inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL);
947 if (!inet_diag_table)
950 sdiagnl = netlink_kernel_create(&init_net, NETLINK_SOCK_DIAG, 0,
951 sock_diag_rcv, NULL, THIS_MODULE);
958 kfree(inet_diag_table);
962 static void __exit inet_diag_exit(void)
964 netlink_kernel_release(sdiagnl);
965 kfree(inet_diag_table);
968 module_init(inet_diag_init);
969 module_exit(inet_diag_exit);
970 MODULE_LICENSE("GPL");
971 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_SOCK_DIAG);