1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * inet_diag.c Module for monitoring INET transport protocols sockets.
5 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
8 #include <linux/kernel.h>
9 #include <linux/module.h>
10 #include <linux/types.h>
11 #include <linux/fcntl.h>
12 #include <linux/random.h>
13 #include <linux/slab.h>
14 #include <linux/cache.h>
15 #include <linux/init.h>
16 #include <linux/time.h>
21 #include <net/inet_common.h>
22 #include <net/inet_connection_sock.h>
23 #include <net/inet_hashtables.h>
24 #include <net/inet_timewait_sock.h>
25 #include <net/inet6_hashtables.h>
26 #include <net/netlink.h>
28 #include <linux/inet.h>
29 #include <linux/stddef.h>
31 #include <linux/inet_diag.h>
32 #include <linux/sock_diag.h>
34 static const struct inet_diag_handler **inet_diag_table;
36 struct inet_diag_entry {
47 static DEFINE_MUTEX(inet_diag_table_mutex);
49 static const struct inet_diag_handler *inet_diag_lock_handler(int proto)
51 if (!inet_diag_table[proto])
52 sock_load_diag_module(AF_INET, proto);
54 mutex_lock(&inet_diag_table_mutex);
55 if (!inet_diag_table[proto])
56 return ERR_PTR(-ENOENT);
58 return inet_diag_table[proto];
61 static void inet_diag_unlock_handler(const struct inet_diag_handler *handler)
63 mutex_unlock(&inet_diag_table_mutex);
66 void inet_diag_msg_common_fill(struct inet_diag_msg *r, struct sock *sk)
68 r->idiag_family = sk->sk_family;
70 r->id.idiag_sport = htons(sk->sk_num);
71 r->id.idiag_dport = sk->sk_dport;
72 r->id.idiag_if = sk->sk_bound_dev_if;
73 sock_diag_save_cookie(sk, r->id.idiag_cookie);
75 #if IS_ENABLED(CONFIG_IPV6)
76 if (sk->sk_family == AF_INET6) {
77 *(struct in6_addr *)r->id.idiag_src = sk->sk_v6_rcv_saddr;
78 *(struct in6_addr *)r->id.idiag_dst = sk->sk_v6_daddr;
82 memset(&r->id.idiag_src, 0, sizeof(r->id.idiag_src));
83 memset(&r->id.idiag_dst, 0, sizeof(r->id.idiag_dst));
85 r->id.idiag_src[0] = sk->sk_rcv_saddr;
86 r->id.idiag_dst[0] = sk->sk_daddr;
89 EXPORT_SYMBOL_GPL(inet_diag_msg_common_fill);
91 static size_t inet_sk_attr_size(struct sock *sk,
92 const struct inet_diag_req_v2 *req,
95 const struct inet_diag_handler *handler;
98 handler = inet_diag_table[req->sdiag_protocol];
99 if (handler && handler->idiag_get_aux_size)
100 aux = handler->idiag_get_aux_size(sk, net_admin);
102 return nla_total_size(sizeof(struct tcp_info))
103 + nla_total_size(1) /* INET_DIAG_SHUTDOWN */
104 + nla_total_size(1) /* INET_DIAG_TOS */
105 + nla_total_size(1) /* INET_DIAG_TCLASS */
106 + nla_total_size(4) /* INET_DIAG_MARK */
107 + nla_total_size(4) /* INET_DIAG_CLASS_ID */
108 + nla_total_size(sizeof(struct inet_diag_meminfo))
109 + nla_total_size(sizeof(struct inet_diag_msg))
110 + nla_total_size(SK_MEMINFO_VARS * sizeof(u32))
111 + nla_total_size(TCP_CA_NAME_MAX)
112 + nla_total_size(sizeof(struct tcpvegas_info))
117 int inet_diag_msg_attrs_fill(struct sock *sk, struct sk_buff *skb,
118 struct inet_diag_msg *r, int ext,
119 struct user_namespace *user_ns,
122 const struct inet_sock *inet = inet_sk(sk);
124 if (nla_put_u8(skb, INET_DIAG_SHUTDOWN, sk->sk_shutdown))
127 /* IPv6 dual-stack sockets use inet->tos for IPv4 connections,
128 * hence this needs to be included regardless of socket family.
130 if (ext & (1 << (INET_DIAG_TOS - 1)))
131 if (nla_put_u8(skb, INET_DIAG_TOS, inet->tos) < 0)
134 #if IS_ENABLED(CONFIG_IPV6)
135 if (r->idiag_family == AF_INET6) {
136 if (ext & (1 << (INET_DIAG_TCLASS - 1)))
137 if (nla_put_u8(skb, INET_DIAG_TCLASS,
138 inet6_sk(sk)->tclass) < 0)
141 if (((1 << sk->sk_state) & (TCPF_LISTEN | TCPF_CLOSE)) &&
142 nla_put_u8(skb, INET_DIAG_SKV6ONLY, ipv6_only_sock(sk)))
147 if (net_admin && nla_put_u32(skb, INET_DIAG_MARK, sk->sk_mark))
150 r->idiag_uid = from_kuid_munged(user_ns, sock_i_uid(sk));
151 r->idiag_inode = sock_i_ino(sk);
157 EXPORT_SYMBOL_GPL(inet_diag_msg_attrs_fill);
159 int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk,
160 struct sk_buff *skb, const struct inet_diag_req_v2 *req,
161 struct user_namespace *user_ns,
162 u32 portid, u32 seq, u16 nlmsg_flags,
163 const struct nlmsghdr *unlh,
166 const struct tcp_congestion_ops *ca_ops;
167 const struct inet_diag_handler *handler;
168 int ext = req->idiag_ext;
169 struct inet_diag_msg *r;
170 struct nlmsghdr *nlh;
174 handler = inet_diag_table[req->sdiag_protocol];
177 nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r),
183 BUG_ON(!sk_fullsock(sk));
185 inet_diag_msg_common_fill(r, sk);
186 r->idiag_state = sk->sk_state;
188 r->idiag_retrans = 0;
190 if (inet_diag_msg_attrs_fill(sk, skb, r, ext, user_ns, net_admin))
193 if (ext & (1 << (INET_DIAG_MEMINFO - 1))) {
194 struct inet_diag_meminfo minfo = {
195 .idiag_rmem = sk_rmem_alloc_get(sk),
196 .idiag_wmem = sk->sk_wmem_queued,
197 .idiag_fmem = sk->sk_forward_alloc,
198 .idiag_tmem = sk_wmem_alloc_get(sk),
201 if (nla_put(skb, INET_DIAG_MEMINFO, sizeof(minfo), &minfo) < 0)
205 if (ext & (1 << (INET_DIAG_SKMEMINFO - 1)))
206 if (sock_diag_put_meminfo(sk, skb, INET_DIAG_SKMEMINFO))
210 * RAW sockets might have user-defined protocols assigned,
211 * so report the one supplied on socket creation.
213 if (sk->sk_type == SOCK_RAW) {
214 if (nla_put_u8(skb, INET_DIAG_PROTOCOL, sk->sk_protocol))
219 handler->idiag_get_info(sk, r, NULL);
223 if (icsk->icsk_pending == ICSK_TIME_RETRANS ||
224 icsk->icsk_pending == ICSK_TIME_REO_TIMEOUT ||
225 icsk->icsk_pending == ICSK_TIME_LOSS_PROBE) {
227 r->idiag_retrans = icsk->icsk_retransmits;
229 jiffies_to_msecs(icsk->icsk_timeout - jiffies);
230 } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) {
232 r->idiag_retrans = icsk->icsk_probes_out;
234 jiffies_to_msecs(icsk->icsk_timeout - jiffies);
235 } else if (timer_pending(&sk->sk_timer)) {
237 r->idiag_retrans = icsk->icsk_probes_out;
239 jiffies_to_msecs(sk->sk_timer.expires - jiffies);
242 r->idiag_expires = 0;
245 if ((ext & (1 << (INET_DIAG_INFO - 1))) && handler->idiag_info_size) {
246 attr = nla_reserve_64bit(skb, INET_DIAG_INFO,
247 handler->idiag_info_size,
252 info = nla_data(attr);
255 if (ext & (1 << (INET_DIAG_CONG - 1))) {
259 ca_ops = READ_ONCE(icsk->icsk_ca_ops);
261 err = nla_put_string(skb, INET_DIAG_CONG, ca_ops->name);
267 handler->idiag_get_info(sk, r, info);
269 if (ext & (1 << (INET_DIAG_INFO - 1)) && handler->idiag_get_aux)
270 if (handler->idiag_get_aux(sk, net_admin, skb) < 0)
273 if (sk->sk_state < TCP_TIME_WAIT) {
274 union tcp_cc_info info;
279 ca_ops = READ_ONCE(icsk->icsk_ca_ops);
280 if (ca_ops && ca_ops->get_info)
281 sz = ca_ops->get_info(sk, ext, &attr, &info);
283 if (sz && nla_put(skb, attr, sz, &info) < 0)
287 if (ext & (1 << (INET_DIAG_CLASS_ID - 1)) ||
288 ext & (1 << (INET_DIAG_TCLASS - 1))) {
291 #ifdef CONFIG_SOCK_CGROUP_DATA
292 classid = sock_cgroup_classid(&sk->sk_cgrp_data);
294 /* Fallback to socket priority if class id isn't set.
295 * Classful qdiscs use it as direct reference to class.
296 * For cgroup2 classid is always zero.
299 classid = sk->sk_priority;
301 if (nla_put_u32(skb, INET_DIAG_CLASS_ID, classid))
310 nlmsg_cancel(skb, nlh);
313 EXPORT_SYMBOL_GPL(inet_sk_diag_fill);
315 static int inet_csk_diag_fill(struct sock *sk,
317 const struct inet_diag_req_v2 *req,
318 struct user_namespace *user_ns,
319 u32 portid, u32 seq, u16 nlmsg_flags,
320 const struct nlmsghdr *unlh,
323 return inet_sk_diag_fill(sk, inet_csk(sk), skb, req, user_ns,
324 portid, seq, nlmsg_flags, unlh, net_admin);
327 static int inet_twsk_diag_fill(struct sock *sk,
329 u32 portid, u32 seq, u16 nlmsg_flags,
330 const struct nlmsghdr *unlh)
332 struct inet_timewait_sock *tw = inet_twsk(sk);
333 struct inet_diag_msg *r;
334 struct nlmsghdr *nlh;
337 nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r),
343 BUG_ON(tw->tw_state != TCP_TIME_WAIT);
345 tmo = tw->tw_timer.expires - jiffies;
349 inet_diag_msg_common_fill(r, sk);
350 r->idiag_retrans = 0;
352 r->idiag_state = tw->tw_substate;
354 r->idiag_expires = jiffies_to_msecs(tmo);
364 static int inet_req_diag_fill(struct sock *sk, struct sk_buff *skb,
365 u32 portid, u32 seq, u16 nlmsg_flags,
366 const struct nlmsghdr *unlh, bool net_admin)
368 struct request_sock *reqsk = inet_reqsk(sk);
369 struct inet_diag_msg *r;
370 struct nlmsghdr *nlh;
373 nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r),
379 inet_diag_msg_common_fill(r, sk);
380 r->idiag_state = TCP_SYN_RECV;
382 r->idiag_retrans = reqsk->num_retrans;
384 BUILD_BUG_ON(offsetof(struct inet_request_sock, ir_cookie) !=
385 offsetof(struct sock, sk_cookie));
387 tmo = inet_reqsk(sk)->rsk_timer.expires - jiffies;
388 r->idiag_expires = (tmo >= 0) ? jiffies_to_msecs(tmo) : 0;
394 if (net_admin && nla_put_u32(skb, INET_DIAG_MARK,
395 inet_rsk(reqsk)->ir_mark))
402 static int sk_diag_fill(struct sock *sk, struct sk_buff *skb,
403 const struct inet_diag_req_v2 *r,
404 struct user_namespace *user_ns,
405 u32 portid, u32 seq, u16 nlmsg_flags,
406 const struct nlmsghdr *unlh, bool net_admin)
408 if (sk->sk_state == TCP_TIME_WAIT)
409 return inet_twsk_diag_fill(sk, skb, portid, seq,
412 if (sk->sk_state == TCP_NEW_SYN_RECV)
413 return inet_req_diag_fill(sk, skb, portid, seq,
414 nlmsg_flags, unlh, net_admin);
416 return inet_csk_diag_fill(sk, skb, r, user_ns, portid, seq,
417 nlmsg_flags, unlh, net_admin);
420 struct sock *inet_diag_find_one_icsk(struct net *net,
421 struct inet_hashinfo *hashinfo,
422 const struct inet_diag_req_v2 *req)
427 if (req->sdiag_family == AF_INET)
428 sk = inet_lookup(net, hashinfo, NULL, 0, req->id.idiag_dst[0],
429 req->id.idiag_dport, req->id.idiag_src[0],
430 req->id.idiag_sport, req->id.idiag_if);
431 #if IS_ENABLED(CONFIG_IPV6)
432 else if (req->sdiag_family == AF_INET6) {
433 if (ipv6_addr_v4mapped((struct in6_addr *)req->id.idiag_dst) &&
434 ipv6_addr_v4mapped((struct in6_addr *)req->id.idiag_src))
435 sk = inet_lookup(net, hashinfo, NULL, 0, req->id.idiag_dst[3],
436 req->id.idiag_dport, req->id.idiag_src[3],
437 req->id.idiag_sport, req->id.idiag_if);
439 sk = inet6_lookup(net, hashinfo, NULL, 0,
440 (struct in6_addr *)req->id.idiag_dst,
442 (struct in6_addr *)req->id.idiag_src,
449 return ERR_PTR(-EINVAL);
453 return ERR_PTR(-ENOENT);
455 if (sock_diag_check_cookie(sk, req->id.idiag_cookie)) {
457 return ERR_PTR(-ENOENT);
462 EXPORT_SYMBOL_GPL(inet_diag_find_one_icsk);
464 int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo,
465 struct sk_buff *in_skb,
466 const struct nlmsghdr *nlh,
467 const struct inet_diag_req_v2 *req)
469 bool net_admin = netlink_net_capable(in_skb, CAP_NET_ADMIN);
470 struct net *net = sock_net(in_skb->sk);
475 sk = inet_diag_find_one_icsk(net, hashinfo, req);
479 rep = nlmsg_new(inet_sk_attr_size(sk, req, net_admin), GFP_KERNEL);
485 err = sk_diag_fill(sk, rep, req,
486 sk_user_ns(NETLINK_CB(in_skb).sk),
487 NETLINK_CB(in_skb).portid,
488 nlh->nlmsg_seq, 0, nlh, net_admin);
490 WARN_ON(err == -EMSGSIZE);
494 err = netlink_unicast(net->diag_nlsk, rep, NETLINK_CB(in_skb).portid,
505 EXPORT_SYMBOL_GPL(inet_diag_dump_one_icsk);
507 static int inet_diag_cmd_exact(int cmd, struct sk_buff *in_skb,
508 const struct nlmsghdr *nlh,
509 const struct inet_diag_req_v2 *req)
511 const struct inet_diag_handler *handler;
514 handler = inet_diag_lock_handler(req->sdiag_protocol);
516 err = PTR_ERR(handler);
517 else if (cmd == SOCK_DIAG_BY_FAMILY)
518 err = handler->dump_one(in_skb, nlh, req);
519 else if (cmd == SOCK_DESTROY && handler->destroy)
520 err = handler->destroy(in_skb, req);
523 inet_diag_unlock_handler(handler);
528 static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits)
530 int words = bits >> 5;
535 if (memcmp(a1, a2, words << 2))
545 mask = htonl((0xffffffff) << (32 - bits));
547 if ((w1 ^ w2) & mask)
554 static int inet_diag_bc_run(const struct nlattr *_bc,
555 const struct inet_diag_entry *entry)
557 const void *bc = nla_data(_bc);
558 int len = nla_len(_bc);
562 const struct inet_diag_bc_op *op = bc;
565 case INET_DIAG_BC_NOP:
567 case INET_DIAG_BC_JMP:
570 case INET_DIAG_BC_S_EQ:
571 yes = entry->sport == op[1].no;
573 case INET_DIAG_BC_S_GE:
574 yes = entry->sport >= op[1].no;
576 case INET_DIAG_BC_S_LE:
577 yes = entry->sport <= op[1].no;
579 case INET_DIAG_BC_D_EQ:
580 yes = entry->dport == op[1].no;
582 case INET_DIAG_BC_D_GE:
583 yes = entry->dport >= op[1].no;
585 case INET_DIAG_BC_D_LE:
586 yes = entry->dport <= op[1].no;
588 case INET_DIAG_BC_AUTO:
589 yes = !(entry->userlocks & SOCK_BINDPORT_LOCK);
591 case INET_DIAG_BC_S_COND:
592 case INET_DIAG_BC_D_COND: {
593 const struct inet_diag_hostcond *cond;
596 cond = (const struct inet_diag_hostcond *)(op + 1);
597 if (cond->port != -1 &&
598 cond->port != (op->code == INET_DIAG_BC_S_COND ?
599 entry->sport : entry->dport)) {
604 if (op->code == INET_DIAG_BC_S_COND)
609 if (cond->family != AF_UNSPEC &&
610 cond->family != entry->family) {
611 if (entry->family == AF_INET6 &&
612 cond->family == AF_INET) {
613 if (addr[0] == 0 && addr[1] == 0 &&
614 addr[2] == htonl(0xffff) &&
615 bitstring_match(addr + 3,
624 if (cond->prefix_len == 0)
626 if (bitstring_match(addr, cond->addr,
632 case INET_DIAG_BC_DEV_COND: {
635 ifindex = *((const u32 *)(op + 1));
636 if (ifindex != entry->ifindex)
640 case INET_DIAG_BC_MARK_COND: {
641 struct inet_diag_markcond *cond;
643 cond = (struct inet_diag_markcond *)(op + 1);
644 if ((entry->mark & cond->mask) != cond->mark)
661 /* This helper is available for all sockets (ESTABLISH, TIMEWAIT, SYN_RECV)
663 static void entry_fill_addrs(struct inet_diag_entry *entry,
664 const struct sock *sk)
666 #if IS_ENABLED(CONFIG_IPV6)
667 if (sk->sk_family == AF_INET6) {
668 entry->saddr = sk->sk_v6_rcv_saddr.s6_addr32;
669 entry->daddr = sk->sk_v6_daddr.s6_addr32;
673 entry->saddr = &sk->sk_rcv_saddr;
674 entry->daddr = &sk->sk_daddr;
678 int inet_diag_bc_sk(const struct nlattr *bc, struct sock *sk)
680 struct inet_sock *inet = inet_sk(sk);
681 struct inet_diag_entry entry;
686 entry.family = sk->sk_family;
687 entry_fill_addrs(&entry, sk);
688 entry.sport = inet->inet_num;
689 entry.dport = ntohs(inet->inet_dport);
690 entry.ifindex = sk->sk_bound_dev_if;
691 entry.userlocks = sk_fullsock(sk) ? sk->sk_userlocks : 0;
693 entry.mark = sk->sk_mark;
694 else if (sk->sk_state == TCP_NEW_SYN_RECV)
695 entry.mark = inet_rsk(inet_reqsk(sk))->ir_mark;
699 return inet_diag_bc_run(bc, &entry);
701 EXPORT_SYMBOL_GPL(inet_diag_bc_sk);
703 static int valid_cc(const void *bc, int len, int cc)
706 const struct inet_diag_bc_op *op = bc;
712 if (op->yes < 4 || op->yes & 3)
720 /* data is u32 ifindex */
721 static bool valid_devcond(const struct inet_diag_bc_op *op, int len,
724 /* Check ifindex space. */
725 *min_len += sizeof(u32);
731 /* Validate an inet_diag_hostcond. */
732 static bool valid_hostcond(const struct inet_diag_bc_op *op, int len,
735 struct inet_diag_hostcond *cond;
738 /* Check hostcond space. */
739 *min_len += sizeof(struct inet_diag_hostcond);
742 cond = (struct inet_diag_hostcond *)(op + 1);
744 /* Check address family and address length. */
745 switch (cond->family) {
750 addr_len = sizeof(struct in_addr);
753 addr_len = sizeof(struct in6_addr);
758 *min_len += addr_len;
762 /* Check prefix length (in bits) vs address length (in bytes). */
763 if (cond->prefix_len > 8 * addr_len)
769 /* Validate a port comparison operator. */
770 static bool valid_port_comparison(const struct inet_diag_bc_op *op,
771 int len, int *min_len)
773 /* Port comparisons put the port in a follow-on inet_diag_bc_op. */
774 *min_len += sizeof(struct inet_diag_bc_op);
780 static bool valid_markcond(const struct inet_diag_bc_op *op, int len,
783 *min_len += sizeof(struct inet_diag_markcond);
784 return len >= *min_len;
787 static int inet_diag_bc_audit(const struct nlattr *attr,
788 const struct sk_buff *skb)
790 bool net_admin = netlink_net_capable(skb, CAP_NET_ADMIN);
791 const void *bytecode, *bc;
792 int bytecode_len, len;
794 if (!attr || nla_len(attr) < sizeof(struct inet_diag_bc_op))
797 bytecode = bc = nla_data(attr);
798 len = bytecode_len = nla_len(attr);
801 int min_len = sizeof(struct inet_diag_bc_op);
802 const struct inet_diag_bc_op *op = bc;
805 case INET_DIAG_BC_S_COND:
806 case INET_DIAG_BC_D_COND:
807 if (!valid_hostcond(bc, len, &min_len))
810 case INET_DIAG_BC_DEV_COND:
811 if (!valid_devcond(bc, len, &min_len))
814 case INET_DIAG_BC_S_EQ:
815 case INET_DIAG_BC_S_GE:
816 case INET_DIAG_BC_S_LE:
817 case INET_DIAG_BC_D_EQ:
818 case INET_DIAG_BC_D_GE:
819 case INET_DIAG_BC_D_LE:
820 if (!valid_port_comparison(bc, len, &min_len))
823 case INET_DIAG_BC_MARK_COND:
826 if (!valid_markcond(bc, len, &min_len))
829 case INET_DIAG_BC_AUTO:
830 case INET_DIAG_BC_JMP:
831 case INET_DIAG_BC_NOP:
837 if (op->code != INET_DIAG_BC_NOP) {
838 if (op->no < min_len || op->no > len + 4 || op->no & 3)
841 !valid_cc(bytecode, bytecode_len, len - op->no))
845 if (op->yes < min_len || op->yes > len + 4 || op->yes & 3)
850 return len == 0 ? 0 : -EINVAL;
853 static int inet_csk_diag_dump(struct sock *sk,
855 struct netlink_callback *cb,
856 const struct inet_diag_req_v2 *r,
857 const struct nlattr *bc,
860 if (!inet_diag_bc_sk(bc, sk))
863 return inet_csk_diag_fill(sk, skb, r,
864 sk_user_ns(NETLINK_CB(cb->skb).sk),
865 NETLINK_CB(cb->skb).portid,
866 cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh,
870 static void twsk_build_assert(void)
872 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_family) !=
873 offsetof(struct sock, sk_family));
875 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_num) !=
876 offsetof(struct inet_sock, inet_num));
878 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_dport) !=
879 offsetof(struct inet_sock, inet_dport));
881 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_rcv_saddr) !=
882 offsetof(struct inet_sock, inet_rcv_saddr));
884 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_daddr) !=
885 offsetof(struct inet_sock, inet_daddr));
887 #if IS_ENABLED(CONFIG_IPV6)
888 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_v6_rcv_saddr) !=
889 offsetof(struct sock, sk_v6_rcv_saddr));
891 BUILD_BUG_ON(offsetof(struct inet_timewait_sock, tw_v6_daddr) !=
892 offsetof(struct sock, sk_v6_daddr));
896 void inet_diag_dump_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *skb,
897 struct netlink_callback *cb,
898 const struct inet_diag_req_v2 *r, struct nlattr *bc)
900 bool net_admin = netlink_net_capable(cb->skb, CAP_NET_ADMIN);
901 struct net *net = sock_net(skb->sk);
902 u32 idiag_states = r->idiag_states;
903 int i, num, s_i, s_num;
906 if (idiag_states & TCPF_SYN_RECV)
907 idiag_states |= TCPF_NEW_SYN_RECV;
909 s_num = num = cb->args[2];
911 if (cb->args[0] == 0) {
912 if (!(idiag_states & TCPF_LISTEN) || r->id.idiag_dport)
915 for (i = s_i; i < INET_LHTABLE_SIZE; i++) {
916 struct inet_listen_hashbucket *ilb;
919 ilb = &hashinfo->listening_hash[i];
920 spin_lock(&ilb->lock);
921 sk_for_each(sk, &ilb->head) {
922 struct inet_sock *inet = inet_sk(sk);
924 if (!net_eq(sock_net(sk), net))
932 if (r->sdiag_family != AF_UNSPEC &&
933 sk->sk_family != r->sdiag_family)
936 if (r->id.idiag_sport != inet->inet_sport &&
940 if (inet_csk_diag_dump(sk, skb, cb, r,
941 bc, net_admin) < 0) {
942 spin_unlock(&ilb->lock);
949 spin_unlock(&ilb->lock);
955 s_i = num = s_num = 0;
958 if (!(idiag_states & ~TCPF_LISTEN))
962 for (i = s_i; i <= hashinfo->ehash_mask; i++) {
963 struct inet_ehash_bucket *head = &hashinfo->ehash[i];
964 spinlock_t *lock = inet_ehash_lockp(hashinfo, i);
965 struct hlist_nulls_node *node;
966 struct sock *sk_arr[SKARR_SZ];
967 int num_arr[SKARR_SZ];
970 if (hlist_nulls_empty(&head->chain))
980 sk_nulls_for_each(sk, node, &head->chain) {
983 if (!net_eq(sock_net(sk), net))
987 state = (sk->sk_state == TCP_TIME_WAIT) ?
988 inet_twsk(sk)->tw_substate : sk->sk_state;
989 if (!(idiag_states & (1 << state)))
991 if (r->sdiag_family != AF_UNSPEC &&
992 sk->sk_family != r->sdiag_family)
994 if (r->id.idiag_sport != htons(sk->sk_num) &&
997 if (r->id.idiag_dport != sk->sk_dport &&
1000 twsk_build_assert();
1002 if (!inet_diag_bc_sk(bc, sk))
1005 if (!refcount_inc_not_zero(&sk->sk_refcnt))
1008 num_arr[accum] = num;
1010 if (++accum == SKARR_SZ)
1015 spin_unlock_bh(lock);
1017 for (idx = 0; idx < accum; idx++) {
1019 res = sk_diag_fill(sk_arr[idx], skb, r,
1020 sk_user_ns(NETLINK_CB(cb->skb).sk),
1021 NETLINK_CB(cb->skb).portid,
1022 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1023 cb->nlh, net_admin);
1027 sock_gen_put(sk_arr[idx]);
1032 if (accum == SKARR_SZ) {
1044 EXPORT_SYMBOL_GPL(inet_diag_dump_icsk);
1046 static int __inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
1047 const struct inet_diag_req_v2 *r,
1050 const struct inet_diag_handler *handler;
1053 handler = inet_diag_lock_handler(r->sdiag_protocol);
1054 if (!IS_ERR(handler))
1055 handler->dump(skb, cb, r, bc);
1057 err = PTR_ERR(handler);
1058 inet_diag_unlock_handler(handler);
1060 return err ? : skb->len;
1063 static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
1065 int hdrlen = sizeof(struct inet_diag_req_v2);
1066 struct nlattr *bc = NULL;
1068 if (nlmsg_attrlen(cb->nlh, hdrlen))
1069 bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE);
1071 return __inet_diag_dump(skb, cb, nlmsg_data(cb->nlh), bc);
1074 static int inet_diag_type2proto(int type)
1077 case TCPDIAG_GETSOCK:
1079 case DCCPDIAG_GETSOCK:
1080 return IPPROTO_DCCP;
1086 static int inet_diag_dump_compat(struct sk_buff *skb,
1087 struct netlink_callback *cb)
1089 struct inet_diag_req *rc = nlmsg_data(cb->nlh);
1090 int hdrlen = sizeof(struct inet_diag_req);
1091 struct inet_diag_req_v2 req;
1092 struct nlattr *bc = NULL;
1094 req.sdiag_family = AF_UNSPEC; /* compatibility */
1095 req.sdiag_protocol = inet_diag_type2proto(cb->nlh->nlmsg_type);
1096 req.idiag_ext = rc->idiag_ext;
1097 req.idiag_states = rc->idiag_states;
1100 if (nlmsg_attrlen(cb->nlh, hdrlen))
1101 bc = nlmsg_find_attr(cb->nlh, hdrlen, INET_DIAG_REQ_BYTECODE);
1103 return __inet_diag_dump(skb, cb, &req, bc);
1106 static int inet_diag_get_exact_compat(struct sk_buff *in_skb,
1107 const struct nlmsghdr *nlh)
1109 struct inet_diag_req *rc = nlmsg_data(nlh);
1110 struct inet_diag_req_v2 req;
1112 req.sdiag_family = rc->idiag_family;
1113 req.sdiag_protocol = inet_diag_type2proto(nlh->nlmsg_type);
1114 req.idiag_ext = rc->idiag_ext;
1115 req.idiag_states = rc->idiag_states;
1118 return inet_diag_cmd_exact(SOCK_DIAG_BY_FAMILY, in_skb, nlh, &req);
1121 static int inet_diag_rcv_msg_compat(struct sk_buff *skb, struct nlmsghdr *nlh)
1123 int hdrlen = sizeof(struct inet_diag_req);
1124 struct net *net = sock_net(skb->sk);
1126 if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX ||
1127 nlmsg_len(nlh) < hdrlen)
1130 if (nlh->nlmsg_flags & NLM_F_DUMP) {
1131 if (nlmsg_attrlen(nlh, hdrlen)) {
1132 struct nlattr *attr;
1135 attr = nlmsg_find_attr(nlh, hdrlen,
1136 INET_DIAG_REQ_BYTECODE);
1137 err = inet_diag_bc_audit(attr, skb);
1142 struct netlink_dump_control c = {
1143 .dump = inet_diag_dump_compat,
1145 return netlink_dump_start(net->diag_nlsk, skb, nlh, &c);
1149 return inet_diag_get_exact_compat(skb, nlh);
1152 static int inet_diag_handler_cmd(struct sk_buff *skb, struct nlmsghdr *h)
1154 int hdrlen = sizeof(struct inet_diag_req_v2);
1155 struct net *net = sock_net(skb->sk);
1157 if (nlmsg_len(h) < hdrlen)
1160 if (h->nlmsg_type == SOCK_DIAG_BY_FAMILY &&
1161 h->nlmsg_flags & NLM_F_DUMP) {
1162 if (nlmsg_attrlen(h, hdrlen)) {
1163 struct nlattr *attr;
1166 attr = nlmsg_find_attr(h, hdrlen,
1167 INET_DIAG_REQ_BYTECODE);
1168 err = inet_diag_bc_audit(attr, skb);
1173 struct netlink_dump_control c = {
1174 .dump = inet_diag_dump,
1176 return netlink_dump_start(net->diag_nlsk, skb, h, &c);
1180 return inet_diag_cmd_exact(h->nlmsg_type, skb, h, nlmsg_data(h));
1184 int inet_diag_handler_get_info(struct sk_buff *skb, struct sock *sk)
1186 const struct inet_diag_handler *handler;
1187 struct nlmsghdr *nlh;
1188 struct nlattr *attr;
1189 struct inet_diag_msg *r;
1193 nlh = nlmsg_put(skb, 0, 0, SOCK_DIAG_BY_FAMILY, sizeof(*r), 0);
1197 r = nlmsg_data(nlh);
1198 memset(r, 0, sizeof(*r));
1199 inet_diag_msg_common_fill(r, sk);
1200 if (sk->sk_type == SOCK_DGRAM || sk->sk_type == SOCK_STREAM)
1201 r->id.idiag_sport = inet_sk(sk)->inet_sport;
1202 r->idiag_state = sk->sk_state;
1204 if ((err = nla_put_u8(skb, INET_DIAG_PROTOCOL, sk->sk_protocol))) {
1205 nlmsg_cancel(skb, nlh);
1209 handler = inet_diag_lock_handler(sk->sk_protocol);
1210 if (IS_ERR(handler)) {
1211 inet_diag_unlock_handler(handler);
1212 nlmsg_cancel(skb, nlh);
1213 return PTR_ERR(handler);
1216 attr = handler->idiag_info_size
1217 ? nla_reserve_64bit(skb, INET_DIAG_INFO,
1218 handler->idiag_info_size,
1222 info = nla_data(attr);
1224 handler->idiag_get_info(sk, r, info);
1225 inet_diag_unlock_handler(handler);
1227 nlmsg_end(skb, nlh);
1231 static const struct sock_diag_handler inet_diag_handler = {
1233 .dump = inet_diag_handler_cmd,
1234 .get_info = inet_diag_handler_get_info,
1235 .destroy = inet_diag_handler_cmd,
1238 static const struct sock_diag_handler inet6_diag_handler = {
1240 .dump = inet_diag_handler_cmd,
1241 .get_info = inet_diag_handler_get_info,
1242 .destroy = inet_diag_handler_cmd,
1245 int inet_diag_register(const struct inet_diag_handler *h)
1247 const __u16 type = h->idiag_type;
1250 if (type >= IPPROTO_MAX)
1253 mutex_lock(&inet_diag_table_mutex);
1255 if (!inet_diag_table[type]) {
1256 inet_diag_table[type] = h;
1259 mutex_unlock(&inet_diag_table_mutex);
1263 EXPORT_SYMBOL_GPL(inet_diag_register);
1265 void inet_diag_unregister(const struct inet_diag_handler *h)
1267 const __u16 type = h->idiag_type;
1269 if (type >= IPPROTO_MAX)
1272 mutex_lock(&inet_diag_table_mutex);
1273 inet_diag_table[type] = NULL;
1274 mutex_unlock(&inet_diag_table_mutex);
1276 EXPORT_SYMBOL_GPL(inet_diag_unregister);
1278 static int __init inet_diag_init(void)
1280 const int inet_diag_table_size = (IPPROTO_MAX *
1281 sizeof(struct inet_diag_handler *));
1284 inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL);
1285 if (!inet_diag_table)
1288 err = sock_diag_register(&inet_diag_handler);
1292 err = sock_diag_register(&inet6_diag_handler);
1296 sock_diag_register_inet_compat(inet_diag_rcv_msg_compat);
1301 sock_diag_unregister(&inet_diag_handler);
1303 kfree(inet_diag_table);
1307 static void __exit inet_diag_exit(void)
1309 sock_diag_unregister(&inet6_diag_handler);
1310 sock_diag_unregister(&inet_diag_handler);
1311 sock_diag_unregister_inet_compat(inet_diag_rcv_msg_compat);
1312 kfree(inet_diag_table);
1315 module_init(inet_diag_init);
1316 module_exit(inet_diag_exit);
1317 MODULE_LICENSE("GPL");
1318 MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2 /* AF_INET */);
1319 MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 10 /* AF_INET6 */);