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>
36 #include <linux/sock_diag.h>
38 static const struct inet_diag_handler **inet_diag_table;
40 struct inet_diag_entry {
49 #define INET_DIAG_PUT(skb, attrtype, attrlen) \
50 RTA_DATA(__RTA_PUT(skb, attrtype, attrlen))
52 static DEFINE_MUTEX(inet_diag_table_mutex);
54 static const struct inet_diag_handler *inet_diag_lock_handler(int proto)
56 if (!inet_diag_table[proto])
57 request_module("net-pf-%d-proto-%d-type-%d", PF_NETLINK,
58 NETLINK_SOCK_DIAG, proto);
60 mutex_lock(&inet_diag_table_mutex);
61 if (!inet_diag_table[proto])
62 return ERR_PTR(-ENOENT);
64 return inet_diag_table[proto];
67 static inline void inet_diag_unlock_handler(
68 const struct inet_diag_handler *handler)
70 mutex_unlock(&inet_diag_table_mutex);
73 static int inet_csk_diag_fill(struct sock *sk,
74 struct sk_buff *skb, struct inet_diag_req *req,
75 u32 pid, u32 seq, u16 nlmsg_flags,
76 const struct nlmsghdr *unlh)
78 const struct inet_sock *inet = inet_sk(sk);
79 const struct inet_connection_sock *icsk = inet_csk(sk);
80 struct inet_diag_msg *r;
83 struct inet_diag_meminfo *minfo = NULL;
84 unsigned char *b = skb_tail_pointer(skb);
85 const struct inet_diag_handler *handler;
86 int ext = req->idiag_ext;
88 handler = inet_diag_table[req->sdiag_protocol];
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, sizeof(struct tcp_info));
103 if ((ext & (1 << (INET_DIAG_CONG - 1))) && icsk->icsk_ca_ops) {
104 const size_t len = strlen(icsk->icsk_ca_ops->name);
106 strcpy(INET_DIAG_PUT(skb, INET_DIAG_CONG, len + 1),
107 icsk->icsk_ca_ops->name);
110 r->idiag_family = sk->sk_family;
111 r->idiag_state = sk->sk_state;
113 r->idiag_retrans = 0;
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);
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;
124 /* IPv6 dual-stack sockets use inet->tos for IPv4 connections,
125 * hence this needs to be included regardless of socket family.
127 if (ext & (1 << (INET_DIAG_TOS - 1)))
128 RTA_PUT_U8(skb, INET_DIAG_TOS, inet->tos);
130 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
131 if (r->idiag_family == AF_INET6) {
132 const struct ipv6_pinfo *np = inet6_sk(sk);
134 *(struct in6_addr *)r->id.idiag_src = np->rcv_saddr;
135 *(struct in6_addr *)r->id.idiag_dst = np->daddr;
136 if (ext & (1 << (INET_DIAG_TCLASS - 1)))
137 RTA_PUT_U8(skb, INET_DIAG_TCLASS, np->tclass);
141 #define EXPIRES_IN_MS(tmo) DIV_ROUND_UP((tmo - jiffies) * 1000, HZ)
143 if (icsk->icsk_pending == ICSK_TIME_RETRANS) {
145 r->idiag_retrans = icsk->icsk_retransmits;
146 r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
147 } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) {
149 r->idiag_retrans = icsk->icsk_probes_out;
150 r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
151 } else if (timer_pending(&sk->sk_timer)) {
153 r->idiag_retrans = icsk->icsk_probes_out;
154 r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires);
157 r->idiag_expires = 0;
161 r->idiag_uid = sock_i_uid(sk);
162 r->idiag_inode = sock_i_ino(sk);
165 minfo->idiag_rmem = sk_rmem_alloc_get(sk);
166 minfo->idiag_wmem = sk->sk_wmem_queued;
167 minfo->idiag_fmem = sk->sk_forward_alloc;
168 minfo->idiag_tmem = sk_wmem_alloc_get(sk);
171 handler->idiag_get_info(sk, r, info);
173 if (sk->sk_state < TCP_TIME_WAIT &&
174 icsk->icsk_ca_ops && icsk->icsk_ca_ops->get_info)
175 icsk->icsk_ca_ops->get_info(sk, ext, skb);
177 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
186 static int inet_twsk_diag_fill(struct inet_timewait_sock *tw,
187 struct sk_buff *skb, struct inet_diag_req *req,
188 u32 pid, u32 seq, u16 nlmsg_flags,
189 const struct nlmsghdr *unlh)
192 struct inet_diag_msg *r;
193 const unsigned char *previous_tail = skb_tail_pointer(skb);
194 struct nlmsghdr *nlh = NLMSG_PUT(skb, pid, seq,
195 unlh->nlmsg_type, sizeof(*r));
198 BUG_ON(tw->tw_state != TCP_TIME_WAIT);
200 nlh->nlmsg_flags = nlmsg_flags;
202 tmo = tw->tw_ttd - jiffies;
206 r->idiag_family = tw->tw_family;
207 r->idiag_retrans = 0;
208 r->id.idiag_if = tw->tw_bound_dev_if;
209 r->id.idiag_cookie[0] = (u32)(unsigned long)tw;
210 r->id.idiag_cookie[1] = (u32)(((unsigned long)tw >> 31) >> 1);
211 r->id.idiag_sport = tw->tw_sport;
212 r->id.idiag_dport = tw->tw_dport;
213 r->id.idiag_src[0] = tw->tw_rcv_saddr;
214 r->id.idiag_dst[0] = tw->tw_daddr;
215 r->idiag_state = tw->tw_substate;
217 r->idiag_expires = DIV_ROUND_UP(tmo * 1000, HZ);
222 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
223 if (tw->tw_family == AF_INET6) {
224 const struct inet6_timewait_sock *tw6 =
225 inet6_twsk((struct sock *)tw);
227 *(struct in6_addr *)r->id.idiag_src = tw6->tw_v6_rcv_saddr;
228 *(struct in6_addr *)r->id.idiag_dst = tw6->tw_v6_daddr;
231 nlh->nlmsg_len = skb_tail_pointer(skb) - previous_tail;
234 nlmsg_trim(skb, previous_tail);
238 static int sk_diag_fill(struct sock *sk, struct sk_buff *skb,
239 struct inet_diag_req *r, u32 pid, u32 seq, u16 nlmsg_flags,
240 const struct nlmsghdr *unlh)
242 if (sk->sk_state == TCP_TIME_WAIT)
243 return inet_twsk_diag_fill((struct inet_timewait_sock *)sk,
244 skb, r, pid, seq, nlmsg_flags,
246 return inet_csk_diag_fill(sk, skb, r, pid, seq, nlmsg_flags, unlh);
249 int inet_diag_check_cookie(struct sock *sk, struct inet_diag_req *req)
251 if ((req->id.idiag_cookie[0] != INET_DIAG_NOCOOKIE ||
252 req->id.idiag_cookie[1] != INET_DIAG_NOCOOKIE) &&
253 ((u32)(unsigned long)sk != req->id.idiag_cookie[0] ||
254 (u32)((((unsigned long)sk) >> 31) >> 1) != req->id.idiag_cookie[1]))
259 EXPORT_SYMBOL_GPL(inet_diag_check_cookie);
261 static int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *in_skb,
262 const struct nlmsghdr *nlh, struct inet_diag_req *req)
269 if (req->sdiag_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->sdiag_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,
292 err = inet_diag_check_cookie(sk, req);
297 rep = alloc_skb(NLMSG_SPACE((sizeof(struct inet_diag_msg) +
298 sizeof(struct inet_diag_meminfo) +
299 sizeof(struct tcp_info) + 64)),
304 err = sk_diag_fill(sk, rep, req,
305 NETLINK_CB(in_skb).pid,
306 nlh->nlmsg_seq, 0, nlh);
308 WARN_ON(err == -EMSGSIZE);
312 err = netlink_unicast(sock_diag_nlsk, rep, NETLINK_CB(in_skb).pid,
319 if (sk->sk_state == TCP_TIME_WAIT)
320 inet_twsk_put((struct inet_timewait_sock *)sk);
328 static int inet_diag_get_exact(struct sk_buff *in_skb,
329 const struct nlmsghdr *nlh,
330 struct inet_diag_req *req)
332 const struct inet_diag_handler *handler;
335 handler = inet_diag_lock_handler(req->sdiag_protocol);
337 err = PTR_ERR(handler);
339 err = inet_diag_dump_one_icsk(handler->idiag_hashinfo,
341 inet_diag_unlock_handler(handler);
346 static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits)
348 int words = bits >> 5;
353 if (memcmp(a1, a2, words << 2))
363 mask = htonl((0xffffffff) << (32 - bits));
365 if ((w1 ^ w2) & mask)
373 static int inet_diag_bc_run(const struct nlattr *_bc,
374 const struct inet_diag_entry *entry)
376 const void *bc = nla_data(_bc);
377 int len = nla_len(_bc);
381 const struct inet_diag_bc_op *op = bc;
384 case INET_DIAG_BC_NOP:
386 case INET_DIAG_BC_JMP:
389 case INET_DIAG_BC_S_GE:
390 yes = entry->sport >= op[1].no;
392 case INET_DIAG_BC_S_LE:
393 yes = entry->sport <= op[1].no;
395 case INET_DIAG_BC_D_GE:
396 yes = entry->dport >= op[1].no;
398 case INET_DIAG_BC_D_LE:
399 yes = entry->dport <= op[1].no;
401 case INET_DIAG_BC_AUTO:
402 yes = !(entry->userlocks & SOCK_BINDPORT_LOCK);
404 case INET_DIAG_BC_S_COND:
405 case INET_DIAG_BC_D_COND: {
406 struct inet_diag_hostcond *cond;
409 cond = (struct inet_diag_hostcond *)(op + 1);
410 if (cond->port != -1 &&
411 cond->port != (op->code == INET_DIAG_BC_S_COND ?
412 entry->sport : entry->dport)) {
417 if (cond->prefix_len == 0)
420 if (op->code == INET_DIAG_BC_S_COND)
425 if (bitstring_match(addr, cond->addr,
428 if (entry->family == AF_INET6 &&
429 cond->family == AF_INET) {
430 if (addr[0] == 0 && addr[1] == 0 &&
431 addr[2] == htonl(0xffff) &&
432 bitstring_match(addr + 3, cond->addr,
452 int inet_diag_bc_sk(const struct nlattr *bc, struct sock *sk)
454 struct inet_diag_entry entry;
455 struct inet_sock *inet = inet_sk(sk);
460 entry.family = sk->sk_family;
461 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
462 if (entry.family == AF_INET6) {
463 struct ipv6_pinfo *np = inet6_sk(sk);
465 entry.saddr = np->rcv_saddr.s6_addr32;
466 entry.daddr = np->daddr.s6_addr32;
470 entry.saddr = &inet->inet_rcv_saddr;
471 entry.daddr = &inet->inet_daddr;
473 entry.sport = inet->inet_num;
474 entry.dport = ntohs(inet->inet_dport);
475 entry.userlocks = sk->sk_userlocks;
477 return inet_diag_bc_run(bc, &entry);
479 EXPORT_SYMBOL_GPL(inet_diag_bc_sk);
481 static int valid_cc(const void *bc, int len, int cc)
484 const struct inet_diag_bc_op *op = bc;
490 if (op->yes < 4 || op->yes & 3)
498 static int inet_diag_bc_audit(const void *bytecode, int bytecode_len)
500 const void *bc = bytecode;
501 int len = bytecode_len;
504 const struct inet_diag_bc_op *op = bc;
506 //printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len);
508 case INET_DIAG_BC_AUTO:
509 case INET_DIAG_BC_S_COND:
510 case INET_DIAG_BC_D_COND:
511 case INET_DIAG_BC_S_GE:
512 case INET_DIAG_BC_S_LE:
513 case INET_DIAG_BC_D_GE:
514 case INET_DIAG_BC_D_LE:
515 case INET_DIAG_BC_JMP:
516 if (op->no < 4 || op->no > len + 4 || op->no & 3)
519 !valid_cc(bytecode, bytecode_len, len - op->no))
522 case INET_DIAG_BC_NOP:
527 if (op->yes < 4 || op->yes > len + 4 || op->yes & 3)
532 return len == 0 ? 0 : -EINVAL;
535 static int inet_csk_diag_dump(struct sock *sk,
537 struct netlink_callback *cb,
538 struct inet_diag_req *r,
539 const struct nlattr *bc)
541 if (!inet_diag_bc_sk(bc, sk))
544 return inet_csk_diag_fill(sk, skb, r,
545 NETLINK_CB(cb->skb).pid,
546 cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh);
549 static int inet_twsk_diag_dump(struct inet_timewait_sock *tw,
551 struct netlink_callback *cb,
552 struct inet_diag_req *r,
553 const struct nlattr *bc)
556 struct inet_diag_entry entry;
558 entry.family = tw->tw_family;
559 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
560 if (tw->tw_family == AF_INET6) {
561 struct inet6_timewait_sock *tw6 =
562 inet6_twsk((struct sock *)tw);
563 entry.saddr = tw6->tw_v6_rcv_saddr.s6_addr32;
564 entry.daddr = tw6->tw_v6_daddr.s6_addr32;
568 entry.saddr = &tw->tw_rcv_saddr;
569 entry.daddr = &tw->tw_daddr;
571 entry.sport = tw->tw_num;
572 entry.dport = ntohs(tw->tw_dport);
575 if (!inet_diag_bc_run(bc, &entry))
579 return inet_twsk_diag_fill(tw, skb, r,
580 NETLINK_CB(cb->skb).pid,
581 cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh);
584 static int inet_diag_fill_req(struct sk_buff *skb, struct sock *sk,
585 struct request_sock *req, u32 pid, u32 seq,
586 const struct nlmsghdr *unlh)
588 const struct inet_request_sock *ireq = inet_rsk(req);
589 struct inet_sock *inet = inet_sk(sk);
590 unsigned char *b = skb_tail_pointer(skb);
591 struct inet_diag_msg *r;
592 struct nlmsghdr *nlh;
595 nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r));
596 nlh->nlmsg_flags = NLM_F_MULTI;
599 r->idiag_family = sk->sk_family;
600 r->idiag_state = TCP_SYN_RECV;
602 r->idiag_retrans = req->retrans;
604 r->id.idiag_if = sk->sk_bound_dev_if;
605 r->id.idiag_cookie[0] = (u32)(unsigned long)req;
606 r->id.idiag_cookie[1] = (u32)(((unsigned long)req >> 31) >> 1);
608 tmo = req->expires - jiffies;
612 r->id.idiag_sport = inet->inet_sport;
613 r->id.idiag_dport = ireq->rmt_port;
614 r->id.idiag_src[0] = ireq->loc_addr;
615 r->id.idiag_dst[0] = ireq->rmt_addr;
616 r->idiag_expires = jiffies_to_msecs(tmo);
619 r->idiag_uid = sock_i_uid(sk);
621 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
622 if (r->idiag_family == AF_INET6) {
623 *(struct in6_addr *)r->id.idiag_src = inet6_rsk(req)->loc_addr;
624 *(struct in6_addr *)r->id.idiag_dst = inet6_rsk(req)->rmt_addr;
627 nlh->nlmsg_len = skb_tail_pointer(skb) - b;
636 static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk,
637 struct netlink_callback *cb,
638 struct inet_diag_req *r,
639 const struct nlattr *bc)
641 struct inet_diag_entry entry;
642 struct inet_connection_sock *icsk = inet_csk(sk);
643 struct listen_sock *lopt;
644 struct inet_sock *inet = inet_sk(sk);
646 int reqnum, s_reqnum;
650 s_reqnum = cb->args[4];
655 entry.family = sk->sk_family;
657 read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
659 lopt = icsk->icsk_accept_queue.listen_opt;
660 if (!lopt || !lopt->qlen)
664 entry.sport = inet->inet_num;
665 entry.userlocks = sk->sk_userlocks;
668 for (j = s_j; j < lopt->nr_table_entries; j++) {
669 struct request_sock *req, *head = lopt->syn_table[j];
672 for (req = head; req; reqnum++, req = req->dl_next) {
673 struct inet_request_sock *ireq = inet_rsk(req);
675 if (reqnum < s_reqnum)
677 if (r->id.idiag_dport != ireq->rmt_port &&
683 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
684 (entry.family == AF_INET6) ?
685 inet6_rsk(req)->loc_addr.s6_addr32 :
689 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
690 (entry.family == AF_INET6) ?
691 inet6_rsk(req)->rmt_addr.s6_addr32 :
694 entry.dport = ntohs(ireq->rmt_port);
696 if (!inet_diag_bc_run(bc, &entry))
700 err = inet_diag_fill_req(skb, sk, req,
701 NETLINK_CB(cb->skb).pid,
702 cb->nlh->nlmsg_seq, cb->nlh);
705 cb->args[4] = reqnum;
714 read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
719 static void inet_diag_dump_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *skb,
720 struct netlink_callback *cb, struct inet_diag_req *r, struct nlattr *bc)
726 s_num = num = cb->args[2];
728 if (cb->args[0] == 0) {
729 if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV)))
732 for (i = s_i; i < INET_LHTABLE_SIZE; i++) {
734 struct hlist_nulls_node *node;
735 struct inet_listen_hashbucket *ilb;
738 ilb = &hashinfo->listening_hash[i];
739 spin_lock_bh(&ilb->lock);
740 sk_nulls_for_each(sk, node, &ilb->head) {
741 struct inet_sock *inet = inet_sk(sk);
748 if (r->sdiag_family != AF_UNSPEC &&
749 sk->sk_family != r->sdiag_family)
752 if (r->id.idiag_sport != inet->inet_sport &&
756 if (!(r->idiag_states & TCPF_LISTEN) ||
761 if (inet_csk_diag_dump(sk, skb, cb, r, bc) < 0) {
762 spin_unlock_bh(&ilb->lock);
767 if (!(r->idiag_states & TCPF_SYN_RECV))
770 if (inet_diag_dump_reqs(skb, sk, cb, r, bc) < 0) {
771 spin_unlock_bh(&ilb->lock);
780 spin_unlock_bh(&ilb->lock);
788 s_i = num = s_num = 0;
791 if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV)))
794 for (i = s_i; i <= hashinfo->ehash_mask; i++) {
795 struct inet_ehash_bucket *head = &hashinfo->ehash[i];
796 spinlock_t *lock = inet_ehash_lockp(hashinfo, i);
798 struct hlist_nulls_node *node;
802 if (hlist_nulls_empty(&head->chain) &&
803 hlist_nulls_empty(&head->twchain))
810 sk_nulls_for_each(sk, node, &head->chain) {
811 struct inet_sock *inet = inet_sk(sk);
815 if (!(r->idiag_states & (1 << sk->sk_state)))
817 if (r->sdiag_family != AF_UNSPEC &&
818 sk->sk_family != r->sdiag_family)
820 if (r->id.idiag_sport != inet->inet_sport &&
823 if (r->id.idiag_dport != inet->inet_dport &&
826 if (inet_csk_diag_dump(sk, skb, cb, r, bc) < 0) {
827 spin_unlock_bh(lock);
834 if (r->idiag_states & TCPF_TIME_WAIT) {
835 struct inet_timewait_sock *tw;
837 inet_twsk_for_each(tw, node,
842 if (r->sdiag_family != AF_UNSPEC &&
843 tw->tw_family != r->sdiag_family)
845 if (r->id.idiag_sport != tw->tw_sport &&
848 if (r->id.idiag_dport != tw->tw_dport &&
851 if (inet_twsk_diag_dump(tw, skb, cb, r, bc) < 0) {
852 spin_unlock_bh(lock);
859 spin_unlock_bh(lock);
869 static int __inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
870 struct inet_diag_req *r, struct nlattr *bc)
872 const struct inet_diag_handler *handler;
874 handler = inet_diag_lock_handler(r->sdiag_protocol);
875 if (!IS_ERR(handler))
876 inet_diag_dump_icsk(handler->idiag_hashinfo, skb, cb, r, bc);
877 inet_diag_unlock_handler(handler);
882 static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
884 struct nlattr *bc = NULL;
885 int hdrlen = sizeof(struct inet_diag_req);
887 if (nlmsg_attrlen(cb->nlh, hdrlen))
888 bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE);
890 return __inet_diag_dump(skb, cb, (struct inet_diag_req *)NLMSG_DATA(cb->nlh), bc);
893 static inline int inet_diag_type2proto(int type)
896 case TCPDIAG_GETSOCK:
898 case DCCPDIAG_GETSOCK:
905 static int inet_diag_dump_compat(struct sk_buff *skb, struct netlink_callback *cb)
907 struct inet_diag_req_compat *rc = NLMSG_DATA(cb->nlh);
908 struct inet_diag_req req;
909 struct nlattr *bc = NULL;
910 int hdrlen = sizeof(struct inet_diag_req_compat);
912 req.sdiag_family = AF_UNSPEC; /* compatibility */
913 req.sdiag_protocol = inet_diag_type2proto(cb->nlh->nlmsg_type);
914 req.idiag_ext = rc->idiag_ext;
915 req.idiag_states = rc->idiag_states;
918 if (nlmsg_attrlen(cb->nlh, hdrlen))
919 bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE);
921 return __inet_diag_dump(skb, cb, &req, bc);
924 static int inet_diag_get_exact_compat(struct sk_buff *in_skb,
925 const struct nlmsghdr *nlh)
927 struct inet_diag_req_compat *rc = NLMSG_DATA(nlh);
928 struct inet_diag_req req;
930 req.sdiag_family = rc->idiag_family;
931 req.sdiag_protocol = inet_diag_type2proto(nlh->nlmsg_type);
932 req.idiag_ext = rc->idiag_ext;
933 req.idiag_states = rc->idiag_states;
936 return inet_diag_get_exact(in_skb, nlh, &req);
939 static int inet_diag_rcv_msg_compat(struct sk_buff *skb, struct nlmsghdr *nlh)
941 int hdrlen = sizeof(struct inet_diag_req_compat);
943 if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX ||
944 nlmsg_len(nlh) < hdrlen)
947 if (nlh->nlmsg_flags & NLM_F_DUMP) {
948 if (nlmsg_attrlen(nlh, hdrlen)) {
951 attr = nlmsg_find_attr(nlh, hdrlen,
952 INET_DIAG_REQ_BYTECODE);
954 nla_len(attr) < sizeof(struct inet_diag_bc_op) ||
955 inet_diag_bc_audit(nla_data(attr), nla_len(attr)))
959 return netlink_dump_start(sock_diag_nlsk, skb, nlh,
960 inet_diag_dump_compat, NULL, 0);
963 return inet_diag_get_exact_compat(skb, nlh);
966 static int inet_diag_handler_dump(struct sk_buff *skb, struct nlmsghdr *h)
968 int hdrlen = sizeof(struct inet_diag_req);
970 if (nlmsg_len(h) < hdrlen)
973 if (h->nlmsg_flags & NLM_F_DUMP) {
974 if (nlmsg_attrlen(h, hdrlen)) {
976 attr = nlmsg_find_attr(h, hdrlen,
977 INET_DIAG_REQ_BYTECODE);
979 nla_len(attr) < sizeof(struct inet_diag_bc_op) ||
980 inet_diag_bc_audit(nla_data(attr), nla_len(attr)))
984 return netlink_dump_start(sock_diag_nlsk, skb, h,
985 inet_diag_dump, NULL, 0);
988 return inet_diag_get_exact(skb, h, (struct inet_diag_req *)NLMSG_DATA(h));
991 static struct sock_diag_handler inet_diag_handler = {
993 .dump = inet_diag_handler_dump,
996 static struct sock_diag_handler inet6_diag_handler = {
998 .dump = inet_diag_handler_dump,
1001 int inet_diag_register(const struct inet_diag_handler *h)
1003 const __u16 type = h->idiag_type;
1006 if (type >= IPPROTO_MAX)
1009 mutex_lock(&inet_diag_table_mutex);
1011 if (inet_diag_table[type] == NULL) {
1012 inet_diag_table[type] = h;
1015 mutex_unlock(&inet_diag_table_mutex);
1019 EXPORT_SYMBOL_GPL(inet_diag_register);
1021 void inet_diag_unregister(const struct inet_diag_handler *h)
1023 const __u16 type = h->idiag_type;
1025 if (type >= IPPROTO_MAX)
1028 mutex_lock(&inet_diag_table_mutex);
1029 inet_diag_table[type] = NULL;
1030 mutex_unlock(&inet_diag_table_mutex);
1032 EXPORT_SYMBOL_GPL(inet_diag_unregister);
1034 static int __init inet_diag_init(void)
1036 const int inet_diag_table_size = (IPPROTO_MAX *
1037 sizeof(struct inet_diag_handler *));
1040 inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL);
1041 if (!inet_diag_table)
1044 err = sock_diag_register(&inet_diag_handler);
1048 err = sock_diag_register(&inet6_diag_handler);
1052 sock_diag_register_inet_compat(inet_diag_rcv_msg_compat);
1057 sock_diag_unregister(&inet_diag_handler);
1059 kfree(inet_diag_table);
1063 static void __exit inet_diag_exit(void)
1065 sock_diag_unregister(&inet6_diag_handler);
1066 sock_diag_unregister(&inet_diag_handler);
1067 sock_diag_unregister_inet_compat(inet_diag_rcv_msg_compat);
1068 kfree(inet_diag_table);
1071 module_init(inet_diag_init);
1072 module_exit(inet_diag_exit);
1073 MODULE_LICENSE("GPL");
1074 MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 0);