1 #include <linux/module.h>
2 #include <linux/inet_diag.h>
3 #include <linux/sock_diag.h>
4 #include <net/sctp/sctp.h>
6 static void sctp_diag_get_info(struct sock *sk, struct inet_diag_msg *r,
9 /* define some functions to make asoc/ep fill look clean */
10 static void inet_diag_msg_sctpasoc_fill(struct inet_diag_msg *r,
12 struct sctp_association *asoc)
14 union sctp_addr laddr, paddr;
15 struct dst_entry *dst;
16 struct timer_list *t3_rtx = &asoc->peer.primary_path->T3_rtx_timer;
18 laddr = list_entry(asoc->base.bind_addr.address_list.next,
19 struct sctp_sockaddr_entry, list)->a;
20 paddr = asoc->peer.primary_path->ipaddr;
21 dst = asoc->peer.primary_path->dst;
23 r->idiag_family = sk->sk_family;
24 r->id.idiag_sport = htons(asoc->base.bind_addr.port);
25 r->id.idiag_dport = htons(asoc->peer.port);
26 r->id.idiag_if = dst ? dst->dev->ifindex : 0;
27 sock_diag_save_cookie(sk, r->id.idiag_cookie);
29 #if IS_ENABLED(CONFIG_IPV6)
30 if (sk->sk_family == AF_INET6) {
31 *(struct in6_addr *)r->id.idiag_src = laddr.v6.sin6_addr;
32 *(struct in6_addr *)r->id.idiag_dst = paddr.v6.sin6_addr;
36 memset(&r->id.idiag_src, 0, sizeof(r->id.idiag_src));
37 memset(&r->id.idiag_dst, 0, sizeof(r->id.idiag_dst));
39 r->id.idiag_src[0] = laddr.v4.sin_addr.s_addr;
40 r->id.idiag_dst[0] = paddr.v4.sin_addr.s_addr;
43 r->idiag_state = asoc->state;
44 if (timer_pending(t3_rtx)) {
45 r->idiag_timer = SCTP_EVENT_TIMEOUT_T3_RTX;
46 r->idiag_retrans = asoc->rtx_data_chunks;
47 r->idiag_expires = jiffies_to_msecs(t3_rtx->expires - jiffies);
55 static int inet_diag_msg_sctpladdrs_fill(struct sk_buff *skb,
56 struct list_head *address_list)
58 struct sctp_sockaddr_entry *laddr;
59 int addrlen = sizeof(struct sockaddr_storage);
64 list_for_each_entry_rcu(laddr, address_list, list)
67 attr = nla_reserve(skb, INET_DIAG_LOCALS, addrlen * addrcnt);
71 info = nla_data(attr);
72 list_for_each_entry_rcu(laddr, address_list, list) {
73 memcpy(info, &laddr->a, addrlen);
80 static int inet_diag_msg_sctpaddrs_fill(struct sk_buff *skb,
81 struct sctp_association *asoc)
83 int addrlen = sizeof(struct sockaddr_storage);
84 struct sctp_transport *from;
88 attr = nla_reserve(skb, INET_DIAG_PEERS,
89 addrlen * asoc->peer.transport_count);
93 info = nla_data(attr);
94 list_for_each_entry(from, &asoc->peer.transport_addr_list,
96 memcpy(info, &from->ipaddr, addrlen);
103 /* sctp asoc/ep fill*/
104 static int inet_sctp_diag_fill(struct sock *sk, struct sctp_association *asoc,
106 const struct inet_diag_req_v2 *req,
107 struct user_namespace *user_ns,
108 int portid, u32 seq, u16 nlmsg_flags,
109 const struct nlmsghdr *unlh)
111 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
112 struct list_head *addr_list;
113 struct inet_diag_msg *r;
114 struct nlmsghdr *nlh;
115 int ext = req->idiag_ext;
116 struct sctp_infox infox;
119 nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r),
125 BUG_ON(!sk_fullsock(sk));
128 inet_diag_msg_sctpasoc_fill(r, sk, asoc);
130 inet_diag_msg_common_fill(r, sk);
131 r->idiag_state = sk->sk_state;
133 r->idiag_retrans = 0;
136 if (inet_diag_msg_attrs_fill(sk, skb, r, ext, user_ns))
139 if (ext & (1 << (INET_DIAG_SKMEMINFO - 1))) {
140 u32 mem[SK_MEMINFO_VARS];
143 if (asoc && asoc->ep->sndbuf_policy)
144 amt = asoc->sndbuf_used;
146 amt = sk_wmem_alloc_get(sk);
147 mem[SK_MEMINFO_WMEM_ALLOC] = amt;
148 if (asoc && asoc->ep->rcvbuf_policy)
149 amt = atomic_read(&asoc->rmem_alloc);
151 amt = sk_rmem_alloc_get(sk);
152 mem[SK_MEMINFO_RMEM_ALLOC] = amt;
153 mem[SK_MEMINFO_RCVBUF] = sk->sk_rcvbuf;
154 mem[SK_MEMINFO_SNDBUF] = sk->sk_sndbuf;
155 mem[SK_MEMINFO_FWD_ALLOC] = sk->sk_forward_alloc;
156 mem[SK_MEMINFO_WMEM_QUEUED] = sk->sk_wmem_queued;
157 mem[SK_MEMINFO_OPTMEM] = atomic_read(&sk->sk_omem_alloc);
158 mem[SK_MEMINFO_BACKLOG] = sk->sk_backlog.len;
159 mem[SK_MEMINFO_DROPS] = atomic_read(&sk->sk_drops);
161 if (nla_put(skb, INET_DIAG_SKMEMINFO, sizeof(mem), &mem) < 0)
165 if (ext & (1 << (INET_DIAG_INFO - 1))) {
168 attr = nla_reserve_64bit(skb, INET_DIAG_INFO,
169 sizeof(struct sctp_info),
174 info = nla_data(attr);
176 infox.sctpinfo = (struct sctp_info *)info;
178 sctp_diag_get_info(sk, r, &infox);
180 addr_list = asoc ? &asoc->base.bind_addr.address_list
181 : &ep->base.bind_addr.address_list;
182 if (inet_diag_msg_sctpladdrs_fill(skb, addr_list))
185 if (asoc && (ext & (1 << (INET_DIAG_CONG - 1))))
186 if (nla_put_string(skb, INET_DIAG_CONG, "reno") < 0)
189 if (asoc && inet_diag_msg_sctpaddrs_fill(skb, asoc))
196 nlmsg_cancel(skb, nlh);
200 /* callback and param */
201 struct sctp_comm_param {
203 struct netlink_callback *cb;
204 const struct inet_diag_req_v2 *r;
205 const struct nlmsghdr *nlh;
208 static size_t inet_assoc_attr_size(struct sctp_association *asoc)
210 int addrlen = sizeof(struct sockaddr_storage);
212 struct sctp_sockaddr_entry *laddr;
214 list_for_each_entry_rcu(laddr, &asoc->base.bind_addr.address_list,
218 return nla_total_size(sizeof(struct sctp_info))
219 + nla_total_size(1) /* INET_DIAG_SHUTDOWN */
220 + nla_total_size(1) /* INET_DIAG_TOS */
221 + nla_total_size(1) /* INET_DIAG_TCLASS */
222 + nla_total_size(addrlen * asoc->peer.transport_count)
223 + nla_total_size(addrlen * addrcnt)
224 + nla_total_size(sizeof(struct inet_diag_meminfo))
225 + nla_total_size(sizeof(struct inet_diag_msg))
229 static int sctp_tsp_dump_one(struct sctp_transport *tsp, void *p)
231 struct sctp_association *assoc = tsp->asoc;
232 struct sock *sk = tsp->asoc->base.sk;
233 struct sctp_comm_param *commp = p;
234 struct sk_buff *in_skb = commp->skb;
235 const struct inet_diag_req_v2 *req = commp->r;
236 const struct nlmsghdr *nlh = commp->nlh;
237 struct net *net = sock_net(in_skb->sk);
241 err = sock_diag_check_cookie(sk, req->id.idiag_cookie);
246 rep = nlmsg_new(inet_assoc_attr_size(assoc), GFP_KERNEL);
251 if (sk != assoc->base.sk) {
256 err = inet_sctp_diag_fill(sk, assoc, rep, req,
257 sk_user_ns(NETLINK_CB(in_skb).sk),
258 NETLINK_CB(in_skb).portid,
259 nlh->nlmsg_seq, 0, nlh);
262 WARN_ON(err == -EMSGSIZE);
267 err = netlink_unicast(net->diag_nlsk, rep, NETLINK_CB(in_skb).portid,
275 static int sctp_sock_dump(struct sock *sk, void *p)
277 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
278 struct sctp_comm_param *commp = p;
279 struct sk_buff *skb = commp->skb;
280 struct netlink_callback *cb = commp->cb;
281 const struct inet_diag_req_v2 *r = commp->r;
282 struct sctp_association *assoc;
286 list_for_each_entry(assoc, &ep->asocs, asocs) {
287 if (cb->args[4] < cb->args[1])
290 if (r->id.idiag_sport != htons(assoc->base.bind_addr.port) &&
293 if (r->id.idiag_dport != htons(assoc->peer.port) &&
298 inet_sctp_diag_fill(sk, NULL, skb, r,
299 sk_user_ns(NETLINK_CB(cb->skb).sk),
300 NETLINK_CB(cb->skb).portid,
302 NLM_F_MULTI, cb->nlh) < 0) {
309 if (inet_sctp_diag_fill(sk, assoc, skb, r,
310 sk_user_ns(NETLINK_CB(cb->skb).sk),
311 NETLINK_CB(cb->skb).portid,
312 cb->nlh->nlmsg_seq, 0, cb->nlh) < 0) {
329 static int sctp_get_sock(struct sctp_transport *tsp, void *p)
331 struct sctp_endpoint *ep = tsp->asoc->ep;
332 struct sctp_comm_param *commp = p;
333 struct sock *sk = ep->base.sk;
334 struct netlink_callback *cb = commp->cb;
335 const struct inet_diag_req_v2 *r = commp->r;
336 struct sctp_association *assoc =
337 list_entry(ep->asocs.next, struct sctp_association, asocs);
339 /* find the ep only once through the transports by this condition */
340 if (tsp->asoc != assoc)
343 if (r->sdiag_family != AF_UNSPEC && sk->sk_family != r->sdiag_family)
347 cb->args[5] = (long)sk;
356 static int sctp_ep_dump(struct sctp_endpoint *ep, void *p)
358 struct sctp_comm_param *commp = p;
359 struct sock *sk = ep->base.sk;
360 struct sk_buff *skb = commp->skb;
361 struct netlink_callback *cb = commp->cb;
362 const struct inet_diag_req_v2 *r = commp->r;
363 struct net *net = sock_net(skb->sk);
364 struct inet_sock *inet = inet_sk(sk);
367 if (!net_eq(sock_net(sk), net))
370 if (cb->args[4] < cb->args[1])
373 if (!(r->idiag_states & TCPF_LISTEN) && !list_empty(&ep->asocs))
376 if (r->sdiag_family != AF_UNSPEC &&
377 sk->sk_family != r->sdiag_family)
380 if (r->id.idiag_sport != inet->inet_sport &&
384 if (r->id.idiag_dport != inet->inet_dport &&
388 if (inet_sctp_diag_fill(sk, NULL, skb, r,
389 sk_user_ns(NETLINK_CB(cb->skb).sk),
390 NETLINK_CB(cb->skb).portid,
391 cb->nlh->nlmsg_seq, NLM_F_MULTI,
402 /* define the functions for sctp_diag_handler*/
403 static void sctp_diag_get_info(struct sock *sk, struct inet_diag_msg *r,
406 struct sctp_infox *infox = (struct sctp_infox *)info;
409 r->idiag_rqueue = atomic_read(&infox->asoc->rmem_alloc);
410 r->idiag_wqueue = infox->asoc->sndbuf_used;
412 r->idiag_rqueue = sk->sk_ack_backlog;
413 r->idiag_wqueue = sk->sk_max_ack_backlog;
416 sctp_get_sctp_info(sk, infox->asoc, infox->sctpinfo);
419 static int sctp_diag_dump_one(struct sk_buff *in_skb,
420 const struct nlmsghdr *nlh,
421 const struct inet_diag_req_v2 *req)
423 struct net *net = sock_net(in_skb->sk);
424 union sctp_addr laddr, paddr;
425 struct sctp_comm_param commp = {
431 if (req->sdiag_family == AF_INET) {
432 laddr.v4.sin_port = req->id.idiag_sport;
433 laddr.v4.sin_addr.s_addr = req->id.idiag_src[0];
434 laddr.v4.sin_family = AF_INET;
436 paddr.v4.sin_port = req->id.idiag_dport;
437 paddr.v4.sin_addr.s_addr = req->id.idiag_dst[0];
438 paddr.v4.sin_family = AF_INET;
440 laddr.v6.sin6_port = req->id.idiag_sport;
441 memcpy(&laddr.v6.sin6_addr, req->id.idiag_src,
442 sizeof(laddr.v6.sin6_addr));
443 laddr.v6.sin6_family = AF_INET6;
445 paddr.v6.sin6_port = req->id.idiag_dport;
446 memcpy(&paddr.v6.sin6_addr, req->id.idiag_dst,
447 sizeof(paddr.v6.sin6_addr));
448 paddr.v6.sin6_family = AF_INET6;
451 return sctp_transport_lookup_process(sctp_tsp_dump_one,
452 net, &laddr, &paddr, &commp);
455 static void sctp_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
456 const struct inet_diag_req_v2 *r, struct nlattr *bc)
458 u32 idiag_states = r->idiag_states;
459 struct net *net = sock_net(skb->sk);
460 struct sctp_comm_param commp = {
466 /* eps hashtable dumps
468 * 0 : if it will traversal listen sock
469 * 1 : to record the sock pos of this time's traversal
470 * 4 : to work as a temporary variable to traversal list
472 if (cb->args[0] == 0) {
473 if (!(idiag_states & TCPF_LISTEN))
475 if (sctp_for_each_endpoint(sctp_ep_dump, &commp))
483 /* asocs by transport hashtable dump
485 * 1 : to record the assoc pos of this time's traversal
486 * 2 : to record the transport pos of this time's traversal
487 * 3 : to mark if we have dumped the ep info of the current asoc
488 * 4 : to work as a temporary variable to traversal list
489 * 5 : to save the sk we get from travelsing the tsp list.
491 if (!(idiag_states & ~(TCPF_LISTEN | TCPF_CLOSE)))
496 sctp_for_each_transport(sctp_get_sock, net, cb->args[2], &commp);
498 if (cb->args[5] && !sctp_sock_dump((struct sock *)cb->args[5], &commp))
502 cb->args[1] = cb->args[4];
506 static const struct inet_diag_handler sctp_diag_handler = {
507 .dump = sctp_diag_dump,
508 .dump_one = sctp_diag_dump_one,
509 .idiag_get_info = sctp_diag_get_info,
510 .idiag_type = IPPROTO_SCTP,
511 .idiag_info_size = sizeof(struct sctp_info),
514 static int __init sctp_diag_init(void)
516 return inet_diag_register(&sctp_diag_handler);
519 static void __exit sctp_diag_exit(void)
521 inet_diag_unregister(&sctp_diag_handler);
524 module_init(sctp_diag_init);
525 module_exit(sctp_diag_exit);
526 MODULE_LICENSE("GPL");
527 MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2-132);