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 {
51 static DEFINE_MUTEX(inet_diag_table_mutex);
53 static const struct inet_diag_handler *inet_diag_lock_handler(int proto)
55 if (!inet_diag_table[proto])
56 request_module("net-pf-%d-proto-%d-type-%d-%d", PF_NETLINK,
57 NETLINK_SOCK_DIAG, AF_INET, proto);
59 mutex_lock(&inet_diag_table_mutex);
60 if (!inet_diag_table[proto])
61 return ERR_PTR(-ENOENT);
63 return inet_diag_table[proto];
66 static void inet_diag_unlock_handler(const struct inet_diag_handler *handler)
68 mutex_unlock(&inet_diag_table_mutex);
71 void inet_diag_msg_common_fill(struct inet_diag_msg *r, struct sock *sk)
73 r->idiag_family = sk->sk_family;
75 r->id.idiag_sport = htons(sk->sk_num);
76 r->id.idiag_dport = sk->sk_dport;
77 r->id.idiag_if = sk->sk_bound_dev_if;
78 sock_diag_save_cookie(sk, r->id.idiag_cookie);
80 #if IS_ENABLED(CONFIG_IPV6)
81 if (sk->sk_family == AF_INET6) {
82 *(struct in6_addr *)r->id.idiag_src = sk->sk_v6_rcv_saddr;
83 *(struct in6_addr *)r->id.idiag_dst = sk->sk_v6_daddr;
87 memset(&r->id.idiag_src, 0, sizeof(r->id.idiag_src));
88 memset(&r->id.idiag_dst, 0, sizeof(r->id.idiag_dst));
90 r->id.idiag_src[0] = sk->sk_rcv_saddr;
91 r->id.idiag_dst[0] = sk->sk_daddr;
94 EXPORT_SYMBOL_GPL(inet_diag_msg_common_fill);
96 static size_t inet_sk_attr_size(void)
98 return nla_total_size(sizeof(struct tcp_info))
99 + nla_total_size(1) /* INET_DIAG_SHUTDOWN */
100 + nla_total_size(1) /* INET_DIAG_TOS */
101 + nla_total_size(1) /* INET_DIAG_TCLASS */
102 + nla_total_size(4) /* INET_DIAG_MARK */
103 + nla_total_size(sizeof(struct inet_diag_meminfo))
104 + nla_total_size(sizeof(struct inet_diag_msg))
105 + nla_total_size(SK_MEMINFO_VARS * sizeof(u32))
106 + nla_total_size(TCP_CA_NAME_MAX)
107 + nla_total_size(sizeof(struct tcpvegas_info))
111 int inet_diag_msg_attrs_fill(struct sock *sk, struct sk_buff *skb,
112 struct inet_diag_msg *r, int ext,
113 struct user_namespace *user_ns,
116 const struct inet_sock *inet = inet_sk(sk);
118 if (nla_put_u8(skb, INET_DIAG_SHUTDOWN, sk->sk_shutdown))
121 /* IPv6 dual-stack sockets use inet->tos for IPv4 connections,
122 * hence this needs to be included regardless of socket family.
124 if (ext & (1 << (INET_DIAG_TOS - 1)))
125 if (nla_put_u8(skb, INET_DIAG_TOS, inet->tos) < 0)
128 #if IS_ENABLED(CONFIG_IPV6)
129 if (r->idiag_family == AF_INET6) {
130 if (ext & (1 << (INET_DIAG_TCLASS - 1)))
131 if (nla_put_u8(skb, INET_DIAG_TCLASS,
132 inet6_sk(sk)->tclass) < 0)
135 if (((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) &&
136 nla_put_u8(skb, INET_DIAG_SKV6ONLY, ipv6_only_sock(sk)))
141 if (net_admin && nla_put_u32(skb, INET_DIAG_MARK, sk->sk_mark))
144 r->idiag_uid = from_kuid_munged(user_ns, sock_i_uid(sk));
145 r->idiag_inode = sock_i_ino(sk);
151 EXPORT_SYMBOL_GPL(inet_diag_msg_attrs_fill);
153 int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk,
154 struct sk_buff *skb, const struct inet_diag_req_v2 *req,
155 struct user_namespace *user_ns,
156 u32 portid, u32 seq, u16 nlmsg_flags,
157 const struct nlmsghdr *unlh,
160 const struct tcp_congestion_ops *ca_ops;
161 const struct inet_diag_handler *handler;
162 int ext = req->idiag_ext;
163 struct inet_diag_msg *r;
164 struct nlmsghdr *nlh;
168 handler = inet_diag_table[req->sdiag_protocol];
171 nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r),
177 BUG_ON(!sk_fullsock(sk));
179 inet_diag_msg_common_fill(r, sk);
180 r->idiag_state = sk->sk_state;
182 r->idiag_retrans = 0;
184 if (inet_diag_msg_attrs_fill(sk, skb, r, ext, user_ns, net_admin))
187 if (ext & (1 << (INET_DIAG_MEMINFO - 1))) {
188 struct inet_diag_meminfo minfo = {
189 .idiag_rmem = sk_rmem_alloc_get(sk),
190 .idiag_wmem = sk->sk_wmem_queued,
191 .idiag_fmem = sk->sk_forward_alloc,
192 .idiag_tmem = sk_wmem_alloc_get(sk),
195 if (nla_put(skb, INET_DIAG_MEMINFO, sizeof(minfo), &minfo) < 0)
199 if (ext & (1 << (INET_DIAG_SKMEMINFO - 1)))
200 if (sock_diag_put_meminfo(sk, skb, INET_DIAG_SKMEMINFO))
204 handler->idiag_get_info(sk, r, NULL);
208 if (icsk->icsk_pending == ICSK_TIME_RETRANS ||
209 icsk->icsk_pending == ICSK_TIME_EARLY_RETRANS ||
210 icsk->icsk_pending == ICSK_TIME_LOSS_PROBE) {
212 r->idiag_retrans = icsk->icsk_retransmits;
214 jiffies_to_msecs(icsk->icsk_timeout - jiffies);
215 } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) {
217 r->idiag_retrans = icsk->icsk_probes_out;
219 jiffies_to_msecs(icsk->icsk_timeout - jiffies);
220 } else if (timer_pending(&sk->sk_timer)) {
222 r->idiag_retrans = icsk->icsk_probes_out;
224 jiffies_to_msecs(sk->sk_timer.expires - jiffies);
227 r->idiag_expires = 0;
230 if ((ext & (1 << (INET_DIAG_INFO - 1))) && handler->idiag_info_size) {
231 attr = nla_reserve_64bit(skb, INET_DIAG_INFO,
232 handler->idiag_info_size,
237 info = nla_data(attr);
240 if (ext & (1 << (INET_DIAG_CONG - 1))) {
244 ca_ops = READ_ONCE(icsk->icsk_ca_ops);
246 err = nla_put_string(skb, INET_DIAG_CONG, ca_ops->name);
252 handler->idiag_get_info(sk, r, info);
254 if (sk->sk_state < TCP_TIME_WAIT) {
255 union tcp_cc_info info;
260 ca_ops = READ_ONCE(icsk->icsk_ca_ops);
261 if (ca_ops && ca_ops->get_info)
262 sz = ca_ops->get_info(sk, ext, &attr, &info);
264 if (sz && nla_put(skb, attr, sz, &info) < 0)
273 nlmsg_cancel(skb, nlh);
276 EXPORT_SYMBOL_GPL(inet_sk_diag_fill);
278 static int inet_csk_diag_fill(struct sock *sk,
280 const struct inet_diag_req_v2 *req,
281 struct user_namespace *user_ns,
282 u32 portid, u32 seq, u16 nlmsg_flags,
283 const struct nlmsghdr *unlh,
286 return inet_sk_diag_fill(sk, inet_csk(sk), skb, req, user_ns,
287 portid, seq, nlmsg_flags, unlh, net_admin);
290 static int inet_twsk_diag_fill(struct sock *sk,
292 u32 portid, u32 seq, u16 nlmsg_flags,
293 const struct nlmsghdr *unlh)
295 struct inet_timewait_sock *tw = inet_twsk(sk);
296 struct inet_diag_msg *r;
297 struct nlmsghdr *nlh;
300 nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r),
306 BUG_ON(tw->tw_state != TCP_TIME_WAIT);
308 tmo = tw->tw_timer.expires - jiffies;
312 inet_diag_msg_common_fill(r, sk);
313 r->idiag_retrans = 0;
315 r->idiag_state = tw->tw_substate;
317 r->idiag_expires = jiffies_to_msecs(tmo);
327 static int inet_req_diag_fill(struct sock *sk, struct sk_buff *skb,
328 u32 portid, u32 seq, u16 nlmsg_flags,
329 const struct nlmsghdr *unlh, bool net_admin)
331 struct request_sock *reqsk = inet_reqsk(sk);
332 struct inet_diag_msg *r;
333 struct nlmsghdr *nlh;
336 nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r),
342 inet_diag_msg_common_fill(r, sk);
343 r->idiag_state = TCP_SYN_RECV;
345 r->idiag_retrans = reqsk->num_retrans;
347 BUILD_BUG_ON(offsetof(struct inet_request_sock, ir_cookie) !=
348 offsetof(struct sock, sk_cookie));
350 tmo = inet_reqsk(sk)->rsk_timer.expires - jiffies;
351 r->idiag_expires = (tmo >= 0) ? jiffies_to_msecs(tmo) : 0;
357 if (net_admin && nla_put_u32(skb, INET_DIAG_MARK,
358 inet_rsk(reqsk)->ir_mark)) {
359 nlmsg_cancel(skb, nlh);
367 static int sk_diag_fill(struct sock *sk, struct sk_buff *skb,
368 const struct inet_diag_req_v2 *r,
369 struct user_namespace *user_ns,
370 u32 portid, u32 seq, u16 nlmsg_flags,
371 const struct nlmsghdr *unlh, bool net_admin)
373 if (sk->sk_state == TCP_TIME_WAIT)
374 return inet_twsk_diag_fill(sk, skb, portid, seq,
377 if (sk->sk_state == TCP_NEW_SYN_RECV)
378 return inet_req_diag_fill(sk, skb, portid, seq,
379 nlmsg_flags, unlh, net_admin);
381 return inet_csk_diag_fill(sk, skb, r, user_ns, portid, seq,
382 nlmsg_flags, unlh, net_admin);
385 struct sock *inet_diag_find_one_icsk(struct net *net,
386 struct inet_hashinfo *hashinfo,
387 const struct inet_diag_req_v2 *req)
392 if (req->sdiag_family == AF_INET)
393 sk = inet_lookup(net, hashinfo, NULL, 0, req->id.idiag_dst[0],
394 req->id.idiag_dport, req->id.idiag_src[0],
395 req->id.idiag_sport, req->id.idiag_if);
396 #if IS_ENABLED(CONFIG_IPV6)
397 else if (req->sdiag_family == AF_INET6) {
398 if (ipv6_addr_v4mapped((struct in6_addr *)req->id.idiag_dst) &&
399 ipv6_addr_v4mapped((struct in6_addr *)req->id.idiag_src))
400 sk = inet_lookup(net, hashinfo, NULL, 0, req->id.idiag_dst[3],
401 req->id.idiag_dport, req->id.idiag_src[3],
402 req->id.idiag_sport, req->id.idiag_if);
404 sk = inet6_lookup(net, hashinfo, NULL, 0,
405 (struct in6_addr *)req->id.idiag_dst,
407 (struct in6_addr *)req->id.idiag_src,
414 return ERR_PTR(-EINVAL);
418 return ERR_PTR(-ENOENT);
420 if (sock_diag_check_cookie(sk, req->id.idiag_cookie)) {
422 return ERR_PTR(-ENOENT);
427 EXPORT_SYMBOL_GPL(inet_diag_find_one_icsk);
429 int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo,
430 struct sk_buff *in_skb,
431 const struct nlmsghdr *nlh,
432 const struct inet_diag_req_v2 *req)
434 struct net *net = sock_net(in_skb->sk);
439 sk = inet_diag_find_one_icsk(net, hashinfo, req);
443 rep = nlmsg_new(inet_sk_attr_size(), GFP_KERNEL);
449 err = sk_diag_fill(sk, rep, req,
450 sk_user_ns(NETLINK_CB(in_skb).sk),
451 NETLINK_CB(in_skb).portid,
452 nlh->nlmsg_seq, 0, nlh,
453 netlink_net_capable(in_skb, CAP_NET_ADMIN));
455 WARN_ON(err == -EMSGSIZE);
459 err = netlink_unicast(net->diag_nlsk, rep, NETLINK_CB(in_skb).portid,
470 EXPORT_SYMBOL_GPL(inet_diag_dump_one_icsk);
472 static int inet_diag_cmd_exact(int cmd, struct sk_buff *in_skb,
473 const struct nlmsghdr *nlh,
474 const struct inet_diag_req_v2 *req)
476 const struct inet_diag_handler *handler;
479 handler = inet_diag_lock_handler(req->sdiag_protocol);
481 err = PTR_ERR(handler);
482 else if (cmd == SOCK_DIAG_BY_FAMILY)
483 err = handler->dump_one(in_skb, nlh, req);
484 else if (cmd == SOCK_DESTROY && handler->destroy)
485 err = handler->destroy(in_skb, req);
488 inet_diag_unlock_handler(handler);
493 static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits)
495 int words = bits >> 5;
500 if (memcmp(a1, a2, words << 2))
510 mask = htonl((0xffffffff) << (32 - bits));
512 if ((w1 ^ w2) & mask)
519 static int inet_diag_bc_run(const struct nlattr *_bc,
520 const struct inet_diag_entry *entry)
522 const void *bc = nla_data(_bc);
523 int len = nla_len(_bc);
527 const struct inet_diag_bc_op *op = bc;
530 case INET_DIAG_BC_NOP:
532 case INET_DIAG_BC_JMP:
535 case INET_DIAG_BC_S_GE:
536 yes = entry->sport >= op[1].no;
538 case INET_DIAG_BC_S_LE:
539 yes = entry->sport <= op[1].no;
541 case INET_DIAG_BC_D_GE:
542 yes = entry->dport >= op[1].no;
544 case INET_DIAG_BC_D_LE:
545 yes = entry->dport <= op[1].no;
547 case INET_DIAG_BC_AUTO:
548 yes = !(entry->userlocks & SOCK_BINDPORT_LOCK);
550 case INET_DIAG_BC_S_COND:
551 case INET_DIAG_BC_D_COND: {
552 const struct inet_diag_hostcond *cond;
555 cond = (const struct inet_diag_hostcond *)(op + 1);
556 if (cond->port != -1 &&
557 cond->port != (op->code == INET_DIAG_BC_S_COND ?
558 entry->sport : entry->dport)) {
563 if (op->code == INET_DIAG_BC_S_COND)
568 if (cond->family != AF_UNSPEC &&
569 cond->family != entry->family) {
570 if (entry->family == AF_INET6 &&
571 cond->family == AF_INET) {
572 if (addr[0] == 0 && addr[1] == 0 &&
573 addr[2] == htonl(0xffff) &&
574 bitstring_match(addr + 3,
583 if (cond->prefix_len == 0)
585 if (bitstring_match(addr, cond->addr,
591 case INET_DIAG_BC_DEV_COND: {
594 ifindex = *((const u32 *)(op + 1));
595 if (ifindex != entry->ifindex)
599 case INET_DIAG_BC_MARK_COND: {
600 struct inet_diag_markcond *cond;
602 cond = (struct inet_diag_markcond *)(op + 1);
603 if ((entry->mark & cond->mask) != cond->mark)
620 /* This helper is available for all sockets (ESTABLISH, TIMEWAIT, SYN_RECV)
622 static void entry_fill_addrs(struct inet_diag_entry *entry,
623 const struct sock *sk)
625 #if IS_ENABLED(CONFIG_IPV6)
626 if (sk->sk_family == AF_INET6) {
627 entry->saddr = sk->sk_v6_rcv_saddr.s6_addr32;
628 entry->daddr = sk->sk_v6_daddr.s6_addr32;
632 entry->saddr = &sk->sk_rcv_saddr;
633 entry->daddr = &sk->sk_daddr;
637 int inet_diag_bc_sk(const struct nlattr *bc, struct sock *sk)
639 struct inet_sock *inet = inet_sk(sk);
640 struct inet_diag_entry entry;
645 entry.family = sk->sk_family;
646 entry_fill_addrs(&entry, sk);
647 entry.sport = inet->inet_num;
648 entry.dport = ntohs(inet->inet_dport);
649 entry.ifindex = sk->sk_bound_dev_if;
650 entry.userlocks = sk_fullsock(sk) ? sk->sk_userlocks : 0;
652 entry.mark = sk->sk_mark;
653 else if (sk->sk_state == TCP_NEW_SYN_RECV)
654 entry.mark = inet_rsk(inet_reqsk(sk))->ir_mark;
658 return inet_diag_bc_run(bc, &entry);
660 EXPORT_SYMBOL_GPL(inet_diag_bc_sk);
662 static int valid_cc(const void *bc, int len, int cc)
665 const struct inet_diag_bc_op *op = bc;
671 if (op->yes < 4 || op->yes & 3)
679 /* data is u32 ifindex */
680 static bool valid_devcond(const struct inet_diag_bc_op *op, int len,
683 /* Check ifindex space. */
684 *min_len += sizeof(u32);
690 /* Validate an inet_diag_hostcond. */
691 static bool valid_hostcond(const struct inet_diag_bc_op *op, int len,
694 struct inet_diag_hostcond *cond;
697 /* Check hostcond space. */
698 *min_len += sizeof(struct inet_diag_hostcond);
701 cond = (struct inet_diag_hostcond *)(op + 1);
703 /* Check address family and address length. */
704 switch (cond->family) {
709 addr_len = sizeof(struct in_addr);
712 addr_len = sizeof(struct in6_addr);
717 *min_len += addr_len;
721 /* Check prefix length (in bits) vs address length (in bytes). */
722 if (cond->prefix_len > 8 * addr_len)
728 /* Validate a port comparison operator. */
729 static bool valid_port_comparison(const struct inet_diag_bc_op *op,
730 int len, int *min_len)
732 /* Port comparisons put the port in a follow-on inet_diag_bc_op. */
733 *min_len += sizeof(struct inet_diag_bc_op);
739 static bool valid_markcond(const struct inet_diag_bc_op *op, int len,
742 *min_len += sizeof(struct inet_diag_markcond);
743 return len >= *min_len;
746 static int inet_diag_bc_audit(const struct nlattr *attr,
747 const struct sk_buff *skb)
749 bool net_admin = netlink_net_capable(skb, CAP_NET_ADMIN);
750 const void *bytecode, *bc;
751 int bytecode_len, len;
753 if (!attr || nla_len(attr) < sizeof(struct inet_diag_bc_op))
756 bytecode = bc = nla_data(attr);
757 len = bytecode_len = nla_len(attr);
760 int min_len = sizeof(struct inet_diag_bc_op);
761 const struct inet_diag_bc_op *op = bc;
764 case INET_DIAG_BC_S_COND:
765 case INET_DIAG_BC_D_COND:
766 if (!valid_hostcond(bc, len, &min_len))
769 case INET_DIAG_BC_DEV_COND:
770 if (!valid_devcond(bc, len, &min_len))
773 case INET_DIAG_BC_S_GE:
774 case INET_DIAG_BC_S_LE:
775 case INET_DIAG_BC_D_GE:
776 case INET_DIAG_BC_D_LE:
777 if (!valid_port_comparison(bc, len, &min_len))
780 case INET_DIAG_BC_MARK_COND:
783 if (!valid_markcond(bc, len, &min_len))
786 case INET_DIAG_BC_AUTO:
787 case INET_DIAG_BC_JMP:
788 case INET_DIAG_BC_NOP:
794 if (op->code != INET_DIAG_BC_NOP) {
795 if (op->no < min_len || op->no > len + 4 || op->no & 3)
798 !valid_cc(bytecode, bytecode_len, len - op->no))
802 if (op->yes < min_len || op->yes > len + 4 || op->yes & 3)
807 return len == 0 ? 0 : -EINVAL;
810 static int inet_csk_diag_dump(struct sock *sk,
812 struct netlink_callback *cb,
813 const struct inet_diag_req_v2 *r,
814 const struct nlattr *bc,
817 if (!inet_diag_bc_sk(bc, sk))
820 return inet_csk_diag_fill(sk, skb, r,
821 sk_user_ns(NETLINK_CB(cb->skb).sk),
822 NETLINK_CB(cb->skb).portid,
823 cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh,
827 static void twsk_build_assert(void)
829 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_family) !=
830 offsetof(struct sock, sk_family));
832 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_num) !=
833 offsetof(struct inet_sock, inet_num));
835 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_dport) !=
836 offsetof(struct inet_sock, inet_dport));
838 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_rcv_saddr) !=
839 offsetof(struct inet_sock, inet_rcv_saddr));
841 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_daddr) !=
842 offsetof(struct inet_sock, inet_daddr));
844 #if IS_ENABLED(CONFIG_IPV6)
845 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_v6_rcv_saddr) !=
846 offsetof(struct sock, sk_v6_rcv_saddr));
848 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_v6_daddr) !=
849 offsetof(struct sock, sk_v6_daddr));
853 void inet_diag_dump_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *skb,
854 struct netlink_callback *cb,
855 const struct inet_diag_req_v2 *r, struct nlattr *bc)
857 struct net *net = sock_net(skb->sk);
858 int i, num, s_i, s_num;
859 u32 idiag_states = r->idiag_states;
860 bool net_admin = netlink_net_capable(cb->skb, CAP_NET_ADMIN);
862 if (idiag_states & TCPF_SYN_RECV)
863 idiag_states |= TCPF_NEW_SYN_RECV;
865 s_num = num = cb->args[2];
867 if (cb->args[0] == 0) {
868 if (!(idiag_states & TCPF_LISTEN))
871 for (i = s_i; i < INET_LHTABLE_SIZE; i++) {
872 struct inet_listen_hashbucket *ilb;
873 struct hlist_nulls_node *node;
877 ilb = &hashinfo->listening_hash[i];
878 spin_lock_bh(&ilb->lock);
879 sk_nulls_for_each(sk, node, &ilb->nulls_head) {
880 struct inet_sock *inet = inet_sk(sk);
882 if (!net_eq(sock_net(sk), net))
890 if (r->sdiag_family != AF_UNSPEC &&
891 sk->sk_family != r->sdiag_family)
894 if (r->id.idiag_sport != inet->inet_sport &&
898 if (r->id.idiag_dport ||
902 if (inet_csk_diag_dump(sk, skb, cb, r,
903 bc, net_admin) < 0) {
904 spin_unlock_bh(&ilb->lock);
913 spin_unlock_bh(&ilb->lock);
921 s_i = num = s_num = 0;
924 if (!(idiag_states & ~TCPF_LISTEN))
927 for (i = s_i; i <= hashinfo->ehash_mask; i++) {
928 struct inet_ehash_bucket *head = &hashinfo->ehash[i];
929 spinlock_t *lock = inet_ehash_lockp(hashinfo, i);
930 struct hlist_nulls_node *node;
935 if (hlist_nulls_empty(&head->chain))
942 sk_nulls_for_each(sk, node, &head->chain) {
945 if (!net_eq(sock_net(sk), net))
949 state = (sk->sk_state == TCP_TIME_WAIT) ?
950 inet_twsk(sk)->tw_substate : sk->sk_state;
951 if (!(idiag_states & (1 << state)))
953 if (r->sdiag_family != AF_UNSPEC &&
954 sk->sk_family != r->sdiag_family)
956 if (r->id.idiag_sport != htons(sk->sk_num) &&
959 if (r->id.idiag_dport != sk->sk_dport &&
964 if (!inet_diag_bc_sk(bc, sk))
967 res = sk_diag_fill(sk, skb, r,
968 sk_user_ns(NETLINK_CB(cb->skb).sk),
969 NETLINK_CB(cb->skb).portid,
970 cb->nlh->nlmsg_seq, NLM_F_MULTI,
973 spin_unlock_bh(lock);
980 spin_unlock_bh(lock);
990 EXPORT_SYMBOL_GPL(inet_diag_dump_icsk);
992 static int __inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
993 const struct inet_diag_req_v2 *r,
996 const struct inet_diag_handler *handler;
999 handler = inet_diag_lock_handler(r->sdiag_protocol);
1000 if (!IS_ERR(handler))
1001 handler->dump(skb, cb, r, bc);
1003 err = PTR_ERR(handler);
1004 inet_diag_unlock_handler(handler);
1006 return err ? : skb->len;
1009 static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
1011 int hdrlen = sizeof(struct inet_diag_req_v2);
1012 struct nlattr *bc = NULL;
1014 if (nlmsg_attrlen(cb->nlh, hdrlen))
1015 bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE);
1017 return __inet_diag_dump(skb, cb, nlmsg_data(cb->nlh), bc);
1020 static int inet_diag_type2proto(int type)
1023 case TCPDIAG_GETSOCK:
1025 case DCCPDIAG_GETSOCK:
1026 return IPPROTO_DCCP;
1032 static int inet_diag_dump_compat(struct sk_buff *skb,
1033 struct netlink_callback *cb)
1035 struct inet_diag_req *rc = nlmsg_data(cb->nlh);
1036 int hdrlen = sizeof(struct inet_diag_req);
1037 struct inet_diag_req_v2 req;
1038 struct nlattr *bc = NULL;
1040 req.sdiag_family = AF_UNSPEC; /* compatibility */
1041 req.sdiag_protocol = inet_diag_type2proto(cb->nlh->nlmsg_type);
1042 req.idiag_ext = rc->idiag_ext;
1043 req.idiag_states = rc->idiag_states;
1046 if (nlmsg_attrlen(cb->nlh, hdrlen))
1047 bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE);
1049 return __inet_diag_dump(skb, cb, &req, bc);
1052 static int inet_diag_get_exact_compat(struct sk_buff *in_skb,
1053 const struct nlmsghdr *nlh)
1055 struct inet_diag_req *rc = nlmsg_data(nlh);
1056 struct inet_diag_req_v2 req;
1058 req.sdiag_family = rc->idiag_family;
1059 req.sdiag_protocol = inet_diag_type2proto(nlh->nlmsg_type);
1060 req.idiag_ext = rc->idiag_ext;
1061 req.idiag_states = rc->idiag_states;
1064 return inet_diag_cmd_exact(SOCK_DIAG_BY_FAMILY, in_skb, nlh, &req);
1067 static int inet_diag_rcv_msg_compat(struct sk_buff *skb, struct nlmsghdr *nlh)
1069 int hdrlen = sizeof(struct inet_diag_req);
1070 struct net *net = sock_net(skb->sk);
1072 if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX ||
1073 nlmsg_len(nlh) < hdrlen)
1076 if (nlh->nlmsg_flags & NLM_F_DUMP) {
1077 if (nlmsg_attrlen(nlh, hdrlen)) {
1078 struct nlattr *attr;
1081 attr = nlmsg_find_attr(nlh, hdrlen,
1082 INET_DIAG_REQ_BYTECODE);
1083 err = inet_diag_bc_audit(attr, skb);
1088 struct netlink_dump_control c = {
1089 .dump = inet_diag_dump_compat,
1091 return netlink_dump_start(net->diag_nlsk, skb, nlh, &c);
1095 return inet_diag_get_exact_compat(skb, nlh);
1098 static int inet_diag_handler_cmd(struct sk_buff *skb, struct nlmsghdr *h)
1100 int hdrlen = sizeof(struct inet_diag_req_v2);
1101 struct net *net = sock_net(skb->sk);
1103 if (nlmsg_len(h) < hdrlen)
1106 if (h->nlmsg_type == SOCK_DIAG_BY_FAMILY &&
1107 h->nlmsg_flags & NLM_F_DUMP) {
1108 if (nlmsg_attrlen(h, hdrlen)) {
1109 struct nlattr *attr;
1112 attr = nlmsg_find_attr(h, hdrlen,
1113 INET_DIAG_REQ_BYTECODE);
1114 err = inet_diag_bc_audit(attr, skb);
1119 struct netlink_dump_control c = {
1120 .dump = inet_diag_dump,
1122 return netlink_dump_start(net->diag_nlsk, skb, h, &c);
1126 return inet_diag_cmd_exact(h->nlmsg_type, skb, h, nlmsg_data(h));
1130 int inet_diag_handler_get_info(struct sk_buff *skb, struct sock *sk)
1132 const struct inet_diag_handler *handler;
1133 struct nlmsghdr *nlh;
1134 struct nlattr *attr;
1135 struct inet_diag_msg *r;
1139 nlh = nlmsg_put(skb, 0, 0, SOCK_DIAG_BY_FAMILY, sizeof(*r), 0);
1143 r = nlmsg_data(nlh);
1144 memset(r, 0, sizeof(*r));
1145 inet_diag_msg_common_fill(r, sk);
1146 if (sk->sk_type == SOCK_DGRAM || sk->sk_type == SOCK_STREAM)
1147 r->id.idiag_sport = inet_sk(sk)->inet_sport;
1148 r->idiag_state = sk->sk_state;
1150 if ((err = nla_put_u8(skb, INET_DIAG_PROTOCOL, sk->sk_protocol))) {
1151 nlmsg_cancel(skb, nlh);
1155 handler = inet_diag_lock_handler(sk->sk_protocol);
1156 if (IS_ERR(handler)) {
1157 inet_diag_unlock_handler(handler);
1158 nlmsg_cancel(skb, nlh);
1159 return PTR_ERR(handler);
1162 attr = handler->idiag_info_size
1163 ? nla_reserve_64bit(skb, INET_DIAG_INFO,
1164 handler->idiag_info_size,
1168 info = nla_data(attr);
1170 handler->idiag_get_info(sk, r, info);
1171 inet_diag_unlock_handler(handler);
1173 nlmsg_end(skb, nlh);
1177 static const struct sock_diag_handler inet_diag_handler = {
1179 .dump = inet_diag_handler_cmd,
1180 .get_info = inet_diag_handler_get_info,
1181 .destroy = inet_diag_handler_cmd,
1184 static const struct sock_diag_handler inet6_diag_handler = {
1186 .dump = inet_diag_handler_cmd,
1187 .get_info = inet_diag_handler_get_info,
1188 .destroy = inet_diag_handler_cmd,
1191 int inet_diag_register(const struct inet_diag_handler *h)
1193 const __u16 type = h->idiag_type;
1196 if (type >= IPPROTO_MAX)
1199 mutex_lock(&inet_diag_table_mutex);
1201 if (!inet_diag_table[type]) {
1202 inet_diag_table[type] = h;
1205 mutex_unlock(&inet_diag_table_mutex);
1209 EXPORT_SYMBOL_GPL(inet_diag_register);
1211 void inet_diag_unregister(const struct inet_diag_handler *h)
1213 const __u16 type = h->idiag_type;
1215 if (type >= IPPROTO_MAX)
1218 mutex_lock(&inet_diag_table_mutex);
1219 inet_diag_table[type] = NULL;
1220 mutex_unlock(&inet_diag_table_mutex);
1222 EXPORT_SYMBOL_GPL(inet_diag_unregister);
1224 static int __init inet_diag_init(void)
1226 const int inet_diag_table_size = (IPPROTO_MAX *
1227 sizeof(struct inet_diag_handler *));
1230 inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL);
1231 if (!inet_diag_table)
1234 err = sock_diag_register(&inet_diag_handler);
1238 err = sock_diag_register(&inet6_diag_handler);
1242 sock_diag_register_inet_compat(inet_diag_rcv_msg_compat);
1247 sock_diag_unregister(&inet_diag_handler);
1249 kfree(inet_diag_table);
1253 static void __exit inet_diag_exit(void)
1255 sock_diag_unregister(&inet6_diag_handler);
1256 sock_diag_unregister(&inet_diag_handler);
1257 sock_diag_unregister_inet_compat(inet_diag_rcv_msg_compat);
1258 kfree(inet_diag_table);
1261 module_init(inet_diag_init);
1262 module_exit(inet_diag_exit);
1263 MODULE_LICENSE("GPL");
1264 MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2 /* AF_INET */);
1265 MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 10 /* AF_INET6 */);