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 {
47 #if IS_ENABLED(CONFIG_IPV6)
48 struct in6_addr saddr_storage; /* for IPv4-mapped-IPv6 addresses */
49 struct in6_addr daddr_storage; /* for IPv4-mapped-IPv6 addresses */
53 static DEFINE_MUTEX(inet_diag_table_mutex);
55 static const struct inet_diag_handler *inet_diag_lock_handler(int proto)
57 if (!inet_diag_table[proto])
58 request_module("net-pf-%d-proto-%d-type-%d-%d", PF_NETLINK,
59 NETLINK_SOCK_DIAG, AF_INET, proto);
61 mutex_lock(&inet_diag_table_mutex);
62 if (!inet_diag_table[proto])
63 return ERR_PTR(-ENOENT);
65 return inet_diag_table[proto];
68 static void inet_diag_unlock_handler(const struct inet_diag_handler *handler)
70 mutex_unlock(&inet_diag_table_mutex);
73 int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk,
74 struct sk_buff *skb, const struct inet_diag_req_v2 *req,
75 struct user_namespace *user_ns,
76 u32 portid, u32 seq, u16 nlmsg_flags,
77 const struct nlmsghdr *unlh)
79 const struct inet_sock *inet = inet_sk(sk);
80 const struct inet_diag_handler *handler;
81 int ext = req->idiag_ext;
82 struct inet_diag_msg *r;
87 handler = inet_diag_table[req->sdiag_protocol];
90 nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r),
96 BUG_ON(sk->sk_state == TCP_TIME_WAIT);
98 r->idiag_family = sk->sk_family;
99 r->idiag_state = sk->sk_state;
101 r->idiag_retrans = 0;
103 r->id.idiag_if = sk->sk_bound_dev_if;
104 sock_diag_save_cookie(sk, r->id.idiag_cookie);
106 r->id.idiag_sport = inet->inet_sport;
107 r->id.idiag_dport = inet->inet_dport;
109 memset(&r->id.idiag_src, 0, sizeof(r->id.idiag_src));
110 memset(&r->id.idiag_dst, 0, sizeof(r->id.idiag_dst));
112 r->id.idiag_src[0] = inet->inet_rcv_saddr;
113 r->id.idiag_dst[0] = inet->inet_daddr;
115 if (nla_put_u8(skb, INET_DIAG_SHUTDOWN, sk->sk_shutdown))
118 /* IPv6 dual-stack sockets use inet->tos for IPv4 connections,
119 * hence this needs to be included regardless of socket family.
121 if (ext & (1 << (INET_DIAG_TOS - 1)))
122 if (nla_put_u8(skb, INET_DIAG_TOS, inet->tos) < 0)
125 #if IS_ENABLED(CONFIG_IPV6)
126 if (r->idiag_family == AF_INET6) {
127 *(struct in6_addr *)r->id.idiag_src = sk->sk_v6_rcv_saddr;
128 *(struct in6_addr *)r->id.idiag_dst = sk->sk_v6_daddr;
130 if (ext & (1 << (INET_DIAG_TCLASS - 1)))
131 if (nla_put_u8(skb, INET_DIAG_TCLASS,
132 inet6_sk(sk)->tclass) < 0)
137 r->idiag_uid = from_kuid_munged(user_ns, sock_i_uid(sk));
138 r->idiag_inode = sock_i_ino(sk);
140 if (ext & (1 << (INET_DIAG_MEMINFO - 1))) {
141 struct inet_diag_meminfo minfo = {
142 .idiag_rmem = sk_rmem_alloc_get(sk),
143 .idiag_wmem = sk->sk_wmem_queued,
144 .idiag_fmem = sk->sk_forward_alloc,
145 .idiag_tmem = sk_wmem_alloc_get(sk),
148 if (nla_put(skb, INET_DIAG_MEMINFO, sizeof(minfo), &minfo) < 0)
152 if (ext & (1 << (INET_DIAG_SKMEMINFO - 1)))
153 if (sock_diag_put_meminfo(sk, skb, INET_DIAG_SKMEMINFO))
157 handler->idiag_get_info(sk, r, NULL);
161 #define EXPIRES_IN_MS(tmo) DIV_ROUND_UP((tmo - jiffies) * 1000, HZ)
163 if (icsk->icsk_pending == ICSK_TIME_RETRANS ||
164 icsk->icsk_pending == ICSK_TIME_EARLY_RETRANS ||
165 icsk->icsk_pending == ICSK_TIME_LOSS_PROBE) {
167 r->idiag_retrans = icsk->icsk_retransmits;
168 r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
169 } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) {
171 r->idiag_retrans = icsk->icsk_probes_out;
172 r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout);
173 } else if (timer_pending(&sk->sk_timer)) {
175 r->idiag_retrans = icsk->icsk_probes_out;
176 r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires);
179 r->idiag_expires = 0;
183 if (ext & (1 << (INET_DIAG_INFO - 1))) {
184 attr = nla_reserve(skb, INET_DIAG_INFO,
185 sizeof(struct tcp_info));
189 info = nla_data(attr);
192 if ((ext & (1 << (INET_DIAG_CONG - 1))) && icsk->icsk_ca_ops)
193 if (nla_put_string(skb, INET_DIAG_CONG,
194 icsk->icsk_ca_ops->name) < 0)
197 handler->idiag_get_info(sk, r, info);
199 if (sk->sk_state < TCP_TIME_WAIT &&
200 icsk->icsk_ca_ops && icsk->icsk_ca_ops->get_info)
201 icsk->icsk_ca_ops->get_info(sk, ext, skb);
208 nlmsg_cancel(skb, nlh);
211 EXPORT_SYMBOL_GPL(inet_sk_diag_fill);
213 static int inet_csk_diag_fill(struct sock *sk,
215 const struct inet_diag_req_v2 *req,
216 struct user_namespace *user_ns,
217 u32 portid, u32 seq, u16 nlmsg_flags,
218 const struct nlmsghdr *unlh)
220 return inet_sk_diag_fill(sk, inet_csk(sk), skb, req,
221 user_ns, portid, seq, nlmsg_flags, unlh);
224 static int inet_twsk_diag_fill(struct sock *sk,
226 const struct inet_diag_req_v2 *req,
227 u32 portid, u32 seq, u16 nlmsg_flags,
228 const struct nlmsghdr *unlh)
230 struct inet_timewait_sock *tw = inet_twsk(sk);
231 struct inet_diag_msg *r;
232 struct nlmsghdr *nlh;
235 nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r),
241 BUG_ON(tw->tw_state != TCP_TIME_WAIT);
243 tmo = tw->tw_ttd - inet_tw_time_stamp();
247 r->idiag_family = tw->tw_family;
248 r->idiag_retrans = 0;
250 r->id.idiag_if = tw->tw_bound_dev_if;
251 sock_diag_save_cookie(sk, r->id.idiag_cookie);
253 r->id.idiag_sport = tw->tw_sport;
254 r->id.idiag_dport = tw->tw_dport;
256 memset(&r->id.idiag_src, 0, sizeof(r->id.idiag_src));
257 memset(&r->id.idiag_dst, 0, sizeof(r->id.idiag_dst));
259 r->id.idiag_src[0] = tw->tw_rcv_saddr;
260 r->id.idiag_dst[0] = tw->tw_daddr;
262 r->idiag_state = tw->tw_substate;
264 r->idiag_expires = jiffies_to_msecs(tmo);
269 #if IS_ENABLED(CONFIG_IPV6)
270 if (tw->tw_family == AF_INET6) {
271 *(struct in6_addr *)r->id.idiag_src = tw->tw_v6_rcv_saddr;
272 *(struct in6_addr *)r->id.idiag_dst = tw->tw_v6_daddr;
280 static int sk_diag_fill(struct sock *sk, struct sk_buff *skb,
281 const struct inet_diag_req_v2 *r,
282 struct user_namespace *user_ns,
283 u32 portid, u32 seq, u16 nlmsg_flags,
284 const struct nlmsghdr *unlh)
286 if (sk->sk_state == TCP_TIME_WAIT)
287 return inet_twsk_diag_fill(sk, skb, r, portid, seq,
290 return inet_csk_diag_fill(sk, skb, r, user_ns, portid, seq,
294 int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo,
295 struct sk_buff *in_skb,
296 const struct nlmsghdr *nlh,
297 const struct inet_diag_req_v2 *req)
299 struct net *net = sock_net(in_skb->sk);
305 if (req->sdiag_family == AF_INET)
306 sk = inet_lookup(net, hashinfo, req->id.idiag_dst[0],
307 req->id.idiag_dport, req->id.idiag_src[0],
308 req->id.idiag_sport, req->id.idiag_if);
309 #if IS_ENABLED(CONFIG_IPV6)
310 else if (req->sdiag_family == AF_INET6)
311 sk = inet6_lookup(net, hashinfo,
312 (struct in6_addr *)req->id.idiag_dst,
314 (struct in6_addr *)req->id.idiag_src,
325 err = sock_diag_check_cookie(sk, req->id.idiag_cookie);
329 rep = nlmsg_new(sizeof(struct inet_diag_msg) +
330 sizeof(struct inet_diag_meminfo) +
331 sizeof(struct tcp_info) + 64, GFP_KERNEL);
337 err = sk_diag_fill(sk, rep, req,
338 sk_user_ns(NETLINK_CB(in_skb).sk),
339 NETLINK_CB(in_skb).portid,
340 nlh->nlmsg_seq, 0, nlh);
342 WARN_ON(err == -EMSGSIZE);
346 err = netlink_unicast(net->diag_nlsk, rep, NETLINK_CB(in_skb).portid,
358 EXPORT_SYMBOL_GPL(inet_diag_dump_one_icsk);
360 static int inet_diag_get_exact(struct sk_buff *in_skb,
361 const struct nlmsghdr *nlh,
362 const struct inet_diag_req_v2 *req)
364 const struct inet_diag_handler *handler;
367 handler = inet_diag_lock_handler(req->sdiag_protocol);
369 err = PTR_ERR(handler);
371 err = handler->dump_one(in_skb, nlh, req);
372 inet_diag_unlock_handler(handler);
377 static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits)
379 int words = bits >> 5;
384 if (memcmp(a1, a2, words << 2))
394 mask = htonl((0xffffffff) << (32 - bits));
396 if ((w1 ^ w2) & mask)
403 static int inet_diag_bc_run(const struct nlattr *_bc,
404 const struct inet_diag_entry *entry)
406 const void *bc = nla_data(_bc);
407 int len = nla_len(_bc);
411 const struct inet_diag_bc_op *op = bc;
414 case INET_DIAG_BC_NOP:
416 case INET_DIAG_BC_JMP:
419 case INET_DIAG_BC_S_GE:
420 yes = entry->sport >= op[1].no;
422 case INET_DIAG_BC_S_LE:
423 yes = entry->sport <= op[1].no;
425 case INET_DIAG_BC_D_GE:
426 yes = entry->dport >= op[1].no;
428 case INET_DIAG_BC_D_LE:
429 yes = entry->dport <= op[1].no;
431 case INET_DIAG_BC_AUTO:
432 yes = !(entry->userlocks & SOCK_BINDPORT_LOCK);
434 case INET_DIAG_BC_S_COND:
435 case INET_DIAG_BC_D_COND: {
436 const struct inet_diag_hostcond *cond;
439 cond = (const struct inet_diag_hostcond *)(op + 1);
440 if (cond->port != -1 &&
441 cond->port != (op->code == INET_DIAG_BC_S_COND ?
442 entry->sport : entry->dport)) {
447 if (op->code == INET_DIAG_BC_S_COND)
452 if (cond->family != AF_UNSPEC &&
453 cond->family != entry->family) {
454 if (entry->family == AF_INET6 &&
455 cond->family == AF_INET) {
456 if (addr[0] == 0 && addr[1] == 0 &&
457 addr[2] == htonl(0xffff) &&
458 bitstring_match(addr + 3,
467 if (cond->prefix_len == 0)
469 if (bitstring_match(addr, cond->addr,
488 int inet_diag_bc_sk(const struct nlattr *bc, struct sock *sk)
490 struct inet_sock *inet = inet_sk(sk);
491 struct inet_diag_entry entry;
496 entry.family = sk->sk_family;
497 #if IS_ENABLED(CONFIG_IPV6)
498 if (entry.family == AF_INET6) {
499 entry.saddr = sk->sk_v6_rcv_saddr.s6_addr32;
500 entry.daddr = sk->sk_v6_daddr.s6_addr32;
504 entry.saddr = &inet->inet_rcv_saddr;
505 entry.daddr = &inet->inet_daddr;
507 entry.sport = inet->inet_num;
508 entry.dport = ntohs(inet->inet_dport);
509 entry.userlocks = (sk->sk_state != TCP_TIME_WAIT) ? sk->sk_userlocks : 0;
511 return inet_diag_bc_run(bc, &entry);
513 EXPORT_SYMBOL_GPL(inet_diag_bc_sk);
515 static int valid_cc(const void *bc, int len, int cc)
518 const struct inet_diag_bc_op *op = bc;
524 if (op->yes < 4 || op->yes & 3)
532 /* Validate an inet_diag_hostcond. */
533 static bool valid_hostcond(const struct inet_diag_bc_op *op, int len,
536 struct inet_diag_hostcond *cond;
539 /* Check hostcond space. */
540 *min_len += sizeof(struct inet_diag_hostcond);
543 cond = (struct inet_diag_hostcond *)(op + 1);
545 /* Check address family and address length. */
546 switch (cond->family) {
551 addr_len = sizeof(struct in_addr);
554 addr_len = sizeof(struct in6_addr);
559 *min_len += addr_len;
563 /* Check prefix length (in bits) vs address length (in bytes). */
564 if (cond->prefix_len > 8 * addr_len)
570 /* Validate a port comparison operator. */
571 static bool valid_port_comparison(const struct inet_diag_bc_op *op,
572 int len, int *min_len)
574 /* Port comparisons put the port in a follow-on inet_diag_bc_op. */
575 *min_len += sizeof(struct inet_diag_bc_op);
581 static int inet_diag_bc_audit(const void *bytecode, int bytecode_len)
583 const void *bc = bytecode;
584 int len = bytecode_len;
587 int min_len = sizeof(struct inet_diag_bc_op);
588 const struct inet_diag_bc_op *op = bc;
591 case INET_DIAG_BC_S_COND:
592 case INET_DIAG_BC_D_COND:
593 if (!valid_hostcond(bc, len, &min_len))
596 case INET_DIAG_BC_S_GE:
597 case INET_DIAG_BC_S_LE:
598 case INET_DIAG_BC_D_GE:
599 case INET_DIAG_BC_D_LE:
600 if (!valid_port_comparison(bc, len, &min_len))
603 case INET_DIAG_BC_AUTO:
604 case INET_DIAG_BC_JMP:
605 case INET_DIAG_BC_NOP:
611 if (op->code != INET_DIAG_BC_NOP) {
612 if (op->no < min_len || op->no > len + 4 || op->no & 3)
615 !valid_cc(bytecode, bytecode_len, len - op->no))
619 if (op->yes < min_len || op->yes > len + 4 || op->yes & 3)
624 return len == 0 ? 0 : -EINVAL;
627 static int inet_csk_diag_dump(struct sock *sk,
629 struct netlink_callback *cb,
630 const struct inet_diag_req_v2 *r,
631 const struct nlattr *bc)
633 if (!inet_diag_bc_sk(bc, sk))
636 return inet_csk_diag_fill(sk, skb, r,
637 sk_user_ns(NETLINK_CB(cb->skb).sk),
638 NETLINK_CB(cb->skb).portid,
639 cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh);
642 static void twsk_build_assert(void)
644 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_family) !=
645 offsetof(struct sock, sk_family));
647 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_num) !=
648 offsetof(struct inet_sock, inet_num));
650 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_dport) !=
651 offsetof(struct inet_sock, inet_dport));
653 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_rcv_saddr) !=
654 offsetof(struct inet_sock, inet_rcv_saddr));
656 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_daddr) !=
657 offsetof(struct inet_sock, inet_daddr));
659 #if IS_ENABLED(CONFIG_IPV6)
660 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_v6_rcv_saddr) !=
661 offsetof(struct sock, sk_v6_rcv_saddr));
663 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_v6_daddr) !=
664 offsetof(struct sock, sk_v6_daddr));
668 static int inet_twsk_diag_dump(struct sock *sk,
670 struct netlink_callback *cb,
671 const struct inet_diag_req_v2 *r,
672 const struct nlattr *bc)
676 if (!inet_diag_bc_sk(bc, sk))
679 return inet_twsk_diag_fill(sk, skb, r,
680 NETLINK_CB(cb->skb).portid,
681 cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh);
684 /* Get the IPv4, IPv6, or IPv4-mapped-IPv6 local and remote addresses
685 * from a request_sock. For IPv4-mapped-IPv6 we must map IPv4 to IPv6.
687 static void inet_diag_req_addrs(const struct sock *sk,
688 const struct request_sock *req,
689 struct inet_diag_entry *entry)
691 const struct inet_request_sock *ireq = inet_rsk(req);
693 #if IS_ENABLED(CONFIG_IPV6)
694 if (sk->sk_family == AF_INET6) {
695 if (req->rsk_ops->family == AF_INET6) {
696 entry->saddr = ireq->ir_v6_loc_addr.s6_addr32;
697 entry->daddr = ireq->ir_v6_rmt_addr.s6_addr32;
698 } else if (req->rsk_ops->family == AF_INET) {
699 ipv6_addr_set_v4mapped(ireq->ir_loc_addr,
700 &entry->saddr_storage);
701 ipv6_addr_set_v4mapped(ireq->ir_rmt_addr,
702 &entry->daddr_storage);
703 entry->saddr = entry->saddr_storage.s6_addr32;
704 entry->daddr = entry->daddr_storage.s6_addr32;
709 entry->saddr = &ireq->ir_loc_addr;
710 entry->daddr = &ireq->ir_rmt_addr;
714 static int inet_diag_fill_req(struct sk_buff *skb, struct sock *sk,
715 struct request_sock *req,
716 struct user_namespace *user_ns,
718 const struct nlmsghdr *unlh)
720 const struct inet_request_sock *ireq = inet_rsk(req);
721 struct inet_sock *inet = inet_sk(sk);
722 struct inet_diag_msg *r;
723 struct nlmsghdr *nlh;
726 nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r),
732 r->idiag_family = sk->sk_family;
733 r->idiag_state = TCP_SYN_RECV;
735 r->idiag_retrans = req->num_retrans;
737 r->id.idiag_if = sk->sk_bound_dev_if;
739 BUILD_BUG_ON(offsetof(struct inet_request_sock, ir_cookie) !=
740 offsetof(struct sock, sk_cookie));
741 sock_diag_save_cookie((struct sock *)ireq, r->id.idiag_cookie);
743 tmo = req->expires - jiffies;
747 r->id.idiag_sport = inet->inet_sport;
748 r->id.idiag_dport = ireq->ir_rmt_port;
750 memset(&r->id.idiag_src, 0, sizeof(r->id.idiag_src));
751 memset(&r->id.idiag_dst, 0, sizeof(r->id.idiag_dst));
753 r->id.idiag_src[0] = ireq->ir_loc_addr;
754 r->id.idiag_dst[0] = ireq->ir_rmt_addr;
756 r->idiag_expires = jiffies_to_msecs(tmo);
759 r->idiag_uid = from_kuid_munged(user_ns, sock_i_uid(sk));
761 #if IS_ENABLED(CONFIG_IPV6)
762 if (r->idiag_family == AF_INET6) {
763 struct inet_diag_entry entry;
765 inet_diag_req_addrs(sk, req, &entry);
766 memcpy(r->id.idiag_src, entry.saddr, sizeof(struct in6_addr));
767 memcpy(r->id.idiag_dst, entry.daddr, sizeof(struct in6_addr));
775 static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk,
776 struct netlink_callback *cb,
777 const struct inet_diag_req_v2 *r,
778 const struct nlattr *bc)
780 struct inet_connection_sock *icsk = inet_csk(sk);
781 struct inet_sock *inet = inet_sk(sk);
782 struct inet_diag_entry entry;
783 int j, s_j, reqnum, s_reqnum;
784 struct listen_sock *lopt;
788 s_reqnum = cb->args[4];
793 entry.family = sk->sk_family;
795 read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
797 lopt = icsk->icsk_accept_queue.listen_opt;
798 if (!lopt || !lopt->qlen)
802 entry.sport = inet->inet_num;
803 entry.userlocks = sk->sk_userlocks;
806 for (j = s_j; j < lopt->nr_table_entries; j++) {
807 struct request_sock *req, *head = lopt->syn_table[j];
810 for (req = head; req; reqnum++, req = req->dl_next) {
811 struct inet_request_sock *ireq = inet_rsk(req);
813 if (reqnum < s_reqnum)
815 if (r->id.idiag_dport != ireq->ir_rmt_port &&
820 inet_diag_req_addrs(sk, req, &entry);
821 entry.dport = ntohs(ireq->ir_rmt_port);
823 if (!inet_diag_bc_run(bc, &entry))
827 err = inet_diag_fill_req(skb, sk, req,
828 sk_user_ns(NETLINK_CB(cb->skb).sk),
829 NETLINK_CB(cb->skb).portid,
830 cb->nlh->nlmsg_seq, cb->nlh);
833 cb->args[4] = reqnum;
842 read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock);
847 void inet_diag_dump_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *skb,
848 struct netlink_callback *cb,
849 const struct inet_diag_req_v2 *r, struct nlattr *bc)
851 struct net *net = sock_net(skb->sk);
852 int i, num, s_i, s_num;
855 s_num = num = cb->args[2];
857 if (cb->args[0] == 0) {
858 if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV)))
861 for (i = s_i; i < INET_LHTABLE_SIZE; i++) {
862 struct inet_listen_hashbucket *ilb;
863 struct hlist_nulls_node *node;
867 ilb = &hashinfo->listening_hash[i];
868 spin_lock_bh(&ilb->lock);
869 sk_nulls_for_each(sk, node, &ilb->head) {
870 struct inet_sock *inet = inet_sk(sk);
872 if (!net_eq(sock_net(sk), net))
880 if (r->sdiag_family != AF_UNSPEC &&
881 sk->sk_family != r->sdiag_family)
884 if (r->id.idiag_sport != inet->inet_sport &&
888 if (!(r->idiag_states & TCPF_LISTEN) ||
893 if (inet_csk_diag_dump(sk, skb, cb, r, bc) < 0) {
894 spin_unlock_bh(&ilb->lock);
899 if (!(r->idiag_states & TCPF_SYN_RECV))
902 if (inet_diag_dump_reqs(skb, sk, cb, r, bc) < 0) {
903 spin_unlock_bh(&ilb->lock);
912 spin_unlock_bh(&ilb->lock);
920 s_i = num = s_num = 0;
923 if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV)))
926 for (i = s_i; i <= hashinfo->ehash_mask; i++) {
927 struct inet_ehash_bucket *head = &hashinfo->ehash[i];
928 spinlock_t *lock = inet_ehash_lockp(hashinfo, i);
929 struct hlist_nulls_node *node;
934 if (hlist_nulls_empty(&head->chain))
941 sk_nulls_for_each(sk, node, &head->chain) {
944 if (!net_eq(sock_net(sk), net))
948 state = (sk->sk_state == TCP_TIME_WAIT) ?
949 inet_twsk(sk)->tw_substate : sk->sk_state;
950 if (!(r->idiag_states & (1 << state)))
952 if (r->sdiag_family != AF_UNSPEC &&
953 sk->sk_family != r->sdiag_family)
955 if (r->id.idiag_sport != htons(sk->sk_num) &&
958 if (r->id.idiag_dport != sk->sk_dport &&
961 if (sk->sk_state == TCP_TIME_WAIT)
962 res = inet_twsk_diag_dump(sk, skb, cb, r, bc);
964 res = inet_csk_diag_dump(sk, skb, cb, r, bc);
966 spin_unlock_bh(lock);
973 spin_unlock_bh(lock);
982 EXPORT_SYMBOL_GPL(inet_diag_dump_icsk);
984 static int __inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
985 const struct inet_diag_req_v2 *r,
988 const struct inet_diag_handler *handler;
991 handler = inet_diag_lock_handler(r->sdiag_protocol);
992 if (!IS_ERR(handler))
993 handler->dump(skb, cb, r, bc);
995 err = PTR_ERR(handler);
996 inet_diag_unlock_handler(handler);
998 return err ? : skb->len;
1001 static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
1003 int hdrlen = sizeof(struct inet_diag_req_v2);
1004 struct nlattr *bc = NULL;
1006 if (nlmsg_attrlen(cb->nlh, hdrlen))
1007 bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE);
1009 return __inet_diag_dump(skb, cb, nlmsg_data(cb->nlh), bc);
1012 static int inet_diag_type2proto(int type)
1015 case TCPDIAG_GETSOCK:
1017 case DCCPDIAG_GETSOCK:
1018 return IPPROTO_DCCP;
1024 static int inet_diag_dump_compat(struct sk_buff *skb,
1025 struct netlink_callback *cb)
1027 struct inet_diag_req *rc = nlmsg_data(cb->nlh);
1028 int hdrlen = sizeof(struct inet_diag_req);
1029 struct inet_diag_req_v2 req;
1030 struct nlattr *bc = NULL;
1032 req.sdiag_family = AF_UNSPEC; /* compatibility */
1033 req.sdiag_protocol = inet_diag_type2proto(cb->nlh->nlmsg_type);
1034 req.idiag_ext = rc->idiag_ext;
1035 req.idiag_states = rc->idiag_states;
1038 if (nlmsg_attrlen(cb->nlh, hdrlen))
1039 bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE);
1041 return __inet_diag_dump(skb, cb, &req, bc);
1044 static int inet_diag_get_exact_compat(struct sk_buff *in_skb,
1045 const struct nlmsghdr *nlh)
1047 struct inet_diag_req *rc = nlmsg_data(nlh);
1048 struct inet_diag_req_v2 req;
1050 req.sdiag_family = rc->idiag_family;
1051 req.sdiag_protocol = inet_diag_type2proto(nlh->nlmsg_type);
1052 req.idiag_ext = rc->idiag_ext;
1053 req.idiag_states = rc->idiag_states;
1056 return inet_diag_get_exact(in_skb, nlh, &req);
1059 static int inet_diag_rcv_msg_compat(struct sk_buff *skb, struct nlmsghdr *nlh)
1061 int hdrlen = sizeof(struct inet_diag_req);
1062 struct net *net = sock_net(skb->sk);
1064 if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX ||
1065 nlmsg_len(nlh) < hdrlen)
1068 if (nlh->nlmsg_flags & NLM_F_DUMP) {
1069 if (nlmsg_attrlen(nlh, hdrlen)) {
1070 struct nlattr *attr;
1072 attr = nlmsg_find_attr(nlh, hdrlen,
1073 INET_DIAG_REQ_BYTECODE);
1075 nla_len(attr) < sizeof(struct inet_diag_bc_op) ||
1076 inet_diag_bc_audit(nla_data(attr), nla_len(attr)))
1080 struct netlink_dump_control c = {
1081 .dump = inet_diag_dump_compat,
1083 return netlink_dump_start(net->diag_nlsk, skb, nlh, &c);
1087 return inet_diag_get_exact_compat(skb, nlh);
1090 static int inet_diag_handler_dump(struct sk_buff *skb, struct nlmsghdr *h)
1092 int hdrlen = sizeof(struct inet_diag_req_v2);
1093 struct net *net = sock_net(skb->sk);
1095 if (nlmsg_len(h) < hdrlen)
1098 if (h->nlmsg_flags & NLM_F_DUMP) {
1099 if (nlmsg_attrlen(h, hdrlen)) {
1100 struct nlattr *attr;
1102 attr = nlmsg_find_attr(h, hdrlen,
1103 INET_DIAG_REQ_BYTECODE);
1105 nla_len(attr) < sizeof(struct inet_diag_bc_op) ||
1106 inet_diag_bc_audit(nla_data(attr), nla_len(attr)))
1110 struct netlink_dump_control c = {
1111 .dump = inet_diag_dump,
1113 return netlink_dump_start(net->diag_nlsk, skb, h, &c);
1117 return inet_diag_get_exact(skb, h, nlmsg_data(h));
1120 static const struct sock_diag_handler inet_diag_handler = {
1122 .dump = inet_diag_handler_dump,
1125 static const struct sock_diag_handler inet6_diag_handler = {
1127 .dump = inet_diag_handler_dump,
1130 int inet_diag_register(const struct inet_diag_handler *h)
1132 const __u16 type = h->idiag_type;
1135 if (type >= IPPROTO_MAX)
1138 mutex_lock(&inet_diag_table_mutex);
1140 if (!inet_diag_table[type]) {
1141 inet_diag_table[type] = h;
1144 mutex_unlock(&inet_diag_table_mutex);
1148 EXPORT_SYMBOL_GPL(inet_diag_register);
1150 void inet_diag_unregister(const struct inet_diag_handler *h)
1152 const __u16 type = h->idiag_type;
1154 if (type >= IPPROTO_MAX)
1157 mutex_lock(&inet_diag_table_mutex);
1158 inet_diag_table[type] = NULL;
1159 mutex_unlock(&inet_diag_table_mutex);
1161 EXPORT_SYMBOL_GPL(inet_diag_unregister);
1163 static int __init inet_diag_init(void)
1165 const int inet_diag_table_size = (IPPROTO_MAX *
1166 sizeof(struct inet_diag_handler *));
1169 inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL);
1170 if (!inet_diag_table)
1173 err = sock_diag_register(&inet_diag_handler);
1177 err = sock_diag_register(&inet6_diag_handler);
1181 sock_diag_register_inet_compat(inet_diag_rcv_msg_compat);
1186 sock_diag_unregister(&inet_diag_handler);
1188 kfree(inet_diag_table);
1192 static void __exit inet_diag_exit(void)
1194 sock_diag_unregister(&inet6_diag_handler);
1195 sock_diag_unregister(&inet_diag_handler);
1196 sock_diag_unregister_inet_compat(inet_diag_rcv_msg_compat);
1197 kfree(inet_diag_table);
1200 module_init(inet_diag_init);
1201 module_exit(inet_diag_exit);
1202 MODULE_LICENSE("GPL");
1203 MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2 /* AF_INET */);
1204 MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 10 /* AF_INET6 */);