1 // SPDX-License-Identifier: GPL-2.0-or-later <<
2 /* SCTP kernel implementation 1 /* SCTP kernel implementation
3 * (C) Copyright Red Hat Inc. 2017 2 * (C) Copyright Red Hat Inc. 2017
4 * 3 *
5 * This file is part of the SCTP kernel implem 4 * This file is part of the SCTP kernel implementation
6 * 5 *
7 * These functions implement sctp diag support 6 * These functions implement sctp diag support.
8 * 7 *
>> 8 * This SCTP implementation is free software;
>> 9 * you can redistribute it and/or modify it under the terms of
>> 10 * the GNU General Public License as published by
>> 11 * the Free Software Foundation; either version 2, or (at your option)
>> 12 * any later version.
>> 13 *
>> 14 * This SCTP implementation is distributed in the hope that it
>> 15 * will be useful, but WITHOUT ANY WARRANTY; without even the implied
>> 16 * ************************
>> 17 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
>> 18 * See the GNU General Public License for more details.
>> 19 *
>> 20 * You should have received a copy of the GNU General Public License
>> 21 * along with GNU CC; see the file COPYING. If not, see
>> 22 * <http://www.gnu.org/licenses/>.
>> 23 *
9 * Please send any bug reports or fixes you ma 24 * Please send any bug reports or fixes you make to the
10 * email addresched(es): 25 * email addresched(es):
11 * lksctp developers <linux-sctp@vger.kerne 26 * lksctp developers <linux-sctp@vger.kernel.org>
12 * 27 *
13 * Written or modified by: 28 * Written or modified by:
14 * Xin Long <lucien.xin@gmail.com> 29 * Xin Long <lucien.xin@gmail.com>
15 */ 30 */
16 31
17 #include <linux/module.h> 32 #include <linux/module.h>
18 #include <linux/inet_diag.h> 33 #include <linux/inet_diag.h>
19 #include <linux/sock_diag.h> 34 #include <linux/sock_diag.h>
20 #include <net/sctp/sctp.h> 35 #include <net/sctp/sctp.h>
21 36
22 static void sctp_diag_get_info(struct sock *sk 37 static void sctp_diag_get_info(struct sock *sk, struct inet_diag_msg *r,
23 void *info); 38 void *info);
24 39
25 /* define some functions to make asoc/ep fill 40 /* define some functions to make asoc/ep fill look clean */
26 static void inet_diag_msg_sctpasoc_fill(struct 41 static void inet_diag_msg_sctpasoc_fill(struct inet_diag_msg *r,
27 struct 42 struct sock *sk,
28 struct 43 struct sctp_association *asoc)
29 { 44 {
30 union sctp_addr laddr, paddr; 45 union sctp_addr laddr, paddr;
31 struct dst_entry *dst; 46 struct dst_entry *dst;
32 struct timer_list *t3_rtx = &asoc->pee 47 struct timer_list *t3_rtx = &asoc->peer.primary_path->T3_rtx_timer;
33 48
34 laddr = list_entry(asoc->base.bind_add 49 laddr = list_entry(asoc->base.bind_addr.address_list.next,
35 struct sctp_sockadd 50 struct sctp_sockaddr_entry, list)->a;
36 paddr = asoc->peer.primary_path->ipadd 51 paddr = asoc->peer.primary_path->ipaddr;
37 dst = asoc->peer.primary_path->dst; 52 dst = asoc->peer.primary_path->dst;
38 53
39 r->idiag_family = sk->sk_family; 54 r->idiag_family = sk->sk_family;
40 r->id.idiag_sport = htons(asoc->base.b 55 r->id.idiag_sport = htons(asoc->base.bind_addr.port);
41 r->id.idiag_dport = htons(asoc->peer.p 56 r->id.idiag_dport = htons(asoc->peer.port);
42 r->id.idiag_if = dst ? dst->dev->ifind 57 r->id.idiag_if = dst ? dst->dev->ifindex : 0;
43 sock_diag_save_cookie(sk, r->id.idiag_ 58 sock_diag_save_cookie(sk, r->id.idiag_cookie);
44 59
45 #if IS_ENABLED(CONFIG_IPV6) 60 #if IS_ENABLED(CONFIG_IPV6)
46 if (sk->sk_family == AF_INET6) { 61 if (sk->sk_family == AF_INET6) {
47 *(struct in6_addr *)r->id.idia 62 *(struct in6_addr *)r->id.idiag_src = laddr.v6.sin6_addr;
48 *(struct in6_addr *)r->id.idia 63 *(struct in6_addr *)r->id.idiag_dst = paddr.v6.sin6_addr;
49 } else 64 } else
50 #endif 65 #endif
51 { 66 {
52 memset(&r->id.idiag_src, 0, si 67 memset(&r->id.idiag_src, 0, sizeof(r->id.idiag_src));
53 memset(&r->id.idiag_dst, 0, si 68 memset(&r->id.idiag_dst, 0, sizeof(r->id.idiag_dst));
54 69
55 r->id.idiag_src[0] = laddr.v4. 70 r->id.idiag_src[0] = laddr.v4.sin_addr.s_addr;
56 r->id.idiag_dst[0] = paddr.v4. 71 r->id.idiag_dst[0] = paddr.v4.sin_addr.s_addr;
57 } 72 }
58 73
59 r->idiag_state = asoc->state; 74 r->idiag_state = asoc->state;
60 if (timer_pending(t3_rtx)) { 75 if (timer_pending(t3_rtx)) {
61 r->idiag_timer = SCTP_EVENT_TI 76 r->idiag_timer = SCTP_EVENT_TIMEOUT_T3_RTX;
62 r->idiag_retrans = asoc->rtx_d 77 r->idiag_retrans = asoc->rtx_data_chunks;
63 r->idiag_expires = jiffies_to_ 78 r->idiag_expires = jiffies_to_msecs(t3_rtx->expires - jiffies);
64 } 79 }
65 } 80 }
66 81
67 static int inet_diag_msg_sctpladdrs_fill(struc 82 static int inet_diag_msg_sctpladdrs_fill(struct sk_buff *skb,
68 struc 83 struct list_head *address_list)
69 { 84 {
70 struct sctp_sockaddr_entry *laddr; 85 struct sctp_sockaddr_entry *laddr;
71 int addrlen = sizeof(struct sockaddr_s 86 int addrlen = sizeof(struct sockaddr_storage);
72 int addrcnt = 0; 87 int addrcnt = 0;
73 struct nlattr *attr; 88 struct nlattr *attr;
74 void *info = NULL; 89 void *info = NULL;
75 90
76 list_for_each_entry_rcu(laddr, address 91 list_for_each_entry_rcu(laddr, address_list, list)
77 addrcnt++; 92 addrcnt++;
78 93
79 attr = nla_reserve(skb, INET_DIAG_LOCA 94 attr = nla_reserve(skb, INET_DIAG_LOCALS, addrlen * addrcnt);
80 if (!attr) 95 if (!attr)
81 return -EMSGSIZE; 96 return -EMSGSIZE;
82 97
83 info = nla_data(attr); 98 info = nla_data(attr);
84 list_for_each_entry_rcu(laddr, address 99 list_for_each_entry_rcu(laddr, address_list, list) {
85 memcpy(info, &laddr->a, sizeof 100 memcpy(info, &laddr->a, sizeof(laddr->a));
86 memset(info + sizeof(laddr->a) 101 memset(info + sizeof(laddr->a), 0, addrlen - sizeof(laddr->a));
87 info += addrlen; 102 info += addrlen;
88 } 103 }
89 104
90 return 0; 105 return 0;
91 } 106 }
92 107
93 static int inet_diag_msg_sctpaddrs_fill(struct 108 static int inet_diag_msg_sctpaddrs_fill(struct sk_buff *skb,
94 struct 109 struct sctp_association *asoc)
95 { 110 {
96 int addrlen = sizeof(struct sockaddr_s 111 int addrlen = sizeof(struct sockaddr_storage);
97 struct sctp_transport *from; 112 struct sctp_transport *from;
98 struct nlattr *attr; 113 struct nlattr *attr;
99 void *info = NULL; 114 void *info = NULL;
100 115
101 attr = nla_reserve(skb, INET_DIAG_PEER 116 attr = nla_reserve(skb, INET_DIAG_PEERS,
102 addrlen * asoc->pee 117 addrlen * asoc->peer.transport_count);
103 if (!attr) 118 if (!attr)
104 return -EMSGSIZE; 119 return -EMSGSIZE;
105 120
106 info = nla_data(attr); 121 info = nla_data(attr);
107 list_for_each_entry(from, &asoc->peer. 122 list_for_each_entry(from, &asoc->peer.transport_addr_list,
108 transports) { 123 transports) {
109 memcpy(info, &from->ipaddr, si 124 memcpy(info, &from->ipaddr, sizeof(from->ipaddr));
110 memset(info + sizeof(from->ipa 125 memset(info + sizeof(from->ipaddr), 0,
111 addrlen - sizeof(from-> 126 addrlen - sizeof(from->ipaddr));
112 info += addrlen; 127 info += addrlen;
113 } 128 }
114 129
115 return 0; 130 return 0;
116 } 131 }
117 132
118 /* sctp asoc/ep fill*/ 133 /* sctp asoc/ep fill*/
119 static int inet_sctp_diag_fill(struct sock *sk 134 static int inet_sctp_diag_fill(struct sock *sk, struct sctp_association *asoc,
120 struct sk_buff 135 struct sk_buff *skb,
121 const struct in 136 const struct inet_diag_req_v2 *req,
122 struct user_nam 137 struct user_namespace *user_ns,
123 int portid, u32 138 int portid, u32 seq, u16 nlmsg_flags,
124 const struct nl 139 const struct nlmsghdr *unlh,
125 bool net_admin) 140 bool net_admin)
126 { 141 {
127 struct sctp_endpoint *ep = sctp_sk(sk) 142 struct sctp_endpoint *ep = sctp_sk(sk)->ep;
128 struct list_head *addr_list; 143 struct list_head *addr_list;
129 struct inet_diag_msg *r; 144 struct inet_diag_msg *r;
130 struct nlmsghdr *nlh; 145 struct nlmsghdr *nlh;
131 int ext = req->idiag_ext; 146 int ext = req->idiag_ext;
132 struct sctp_infox infox; 147 struct sctp_infox infox;
133 void *info = NULL; 148 void *info = NULL;
134 149
135 nlh = nlmsg_put(skb, portid, seq, unlh 150 nlh = nlmsg_put(skb, portid, seq, unlh->nlmsg_type, sizeof(*r),
136 nlmsg_flags); 151 nlmsg_flags);
137 if (!nlh) 152 if (!nlh)
138 return -EMSGSIZE; 153 return -EMSGSIZE;
139 154
140 r = nlmsg_data(nlh); 155 r = nlmsg_data(nlh);
141 BUG_ON(!sk_fullsock(sk)); 156 BUG_ON(!sk_fullsock(sk));
142 157
143 r->idiag_timer = 0; 158 r->idiag_timer = 0;
144 r->idiag_retrans = 0; 159 r->idiag_retrans = 0;
145 r->idiag_expires = 0; 160 r->idiag_expires = 0;
146 if (asoc) { 161 if (asoc) {
147 inet_diag_msg_sctpasoc_fill(r, 162 inet_diag_msg_sctpasoc_fill(r, sk, asoc);
148 } else { 163 } else {
149 inet_diag_msg_common_fill(r, s 164 inet_diag_msg_common_fill(r, sk);
150 r->idiag_state = sk->sk_state; 165 r->idiag_state = sk->sk_state;
151 } 166 }
152 167
153 if (inet_diag_msg_attrs_fill(sk, skb, 168 if (inet_diag_msg_attrs_fill(sk, skb, r, ext, user_ns, net_admin))
154 goto errout; 169 goto errout;
155 170
156 if (ext & (1 << (INET_DIAG_SKMEMINFO - 171 if (ext & (1 << (INET_DIAG_SKMEMINFO - 1))) {
157 u32 mem[SK_MEMINFO_VARS]; 172 u32 mem[SK_MEMINFO_VARS];
158 int amt; 173 int amt;
159 174
160 if (asoc && asoc->ep->sndbuf_p 175 if (asoc && asoc->ep->sndbuf_policy)
161 amt = asoc->sndbuf_use 176 amt = asoc->sndbuf_used;
162 else 177 else
163 amt = sk_wmem_alloc_ge 178 amt = sk_wmem_alloc_get(sk);
164 mem[SK_MEMINFO_WMEM_ALLOC] = a 179 mem[SK_MEMINFO_WMEM_ALLOC] = amt;
165 if (asoc && asoc->ep->rcvbuf_p 180 if (asoc && asoc->ep->rcvbuf_policy)
166 amt = atomic_read(&aso 181 amt = atomic_read(&asoc->rmem_alloc);
167 else 182 else
168 amt = sk_rmem_alloc_ge 183 amt = sk_rmem_alloc_get(sk);
169 mem[SK_MEMINFO_RMEM_ALLOC] = a 184 mem[SK_MEMINFO_RMEM_ALLOC] = amt;
170 mem[SK_MEMINFO_RCVBUF] = sk->s 185 mem[SK_MEMINFO_RCVBUF] = sk->sk_rcvbuf;
171 mem[SK_MEMINFO_SNDBUF] = sk->s 186 mem[SK_MEMINFO_SNDBUF] = sk->sk_sndbuf;
172 mem[SK_MEMINFO_FWD_ALLOC] = sk 187 mem[SK_MEMINFO_FWD_ALLOC] = sk->sk_forward_alloc;
173 mem[SK_MEMINFO_WMEM_QUEUED] = 188 mem[SK_MEMINFO_WMEM_QUEUED] = sk->sk_wmem_queued;
174 mem[SK_MEMINFO_OPTMEM] = atomi 189 mem[SK_MEMINFO_OPTMEM] = atomic_read(&sk->sk_omem_alloc);
175 mem[SK_MEMINFO_BACKLOG] = READ !! 190 mem[SK_MEMINFO_BACKLOG] = sk->sk_backlog.len;
176 mem[SK_MEMINFO_DROPS] = atomic 191 mem[SK_MEMINFO_DROPS] = atomic_read(&sk->sk_drops);
177 192
178 if (nla_put(skb, INET_DIAG_SKM 193 if (nla_put(skb, INET_DIAG_SKMEMINFO, sizeof(mem), &mem) < 0)
179 goto errout; 194 goto errout;
180 } 195 }
181 196
182 if (ext & (1 << (INET_DIAG_INFO - 1))) 197 if (ext & (1 << (INET_DIAG_INFO - 1))) {
183 struct nlattr *attr; 198 struct nlattr *attr;
184 199
185 attr = nla_reserve_64bit(skb, 200 attr = nla_reserve_64bit(skb, INET_DIAG_INFO,
186 sizeo 201 sizeof(struct sctp_info),
187 INET_ 202 INET_DIAG_PAD);
188 if (!attr) 203 if (!attr)
189 goto errout; 204 goto errout;
190 205
191 info = nla_data(attr); 206 info = nla_data(attr);
192 } 207 }
193 infox.sctpinfo = (struct sctp_info *)i 208 infox.sctpinfo = (struct sctp_info *)info;
194 infox.asoc = asoc; 209 infox.asoc = asoc;
195 sctp_diag_get_info(sk, r, &infox); 210 sctp_diag_get_info(sk, r, &infox);
196 211
197 addr_list = asoc ? &asoc->base.bind_ad 212 addr_list = asoc ? &asoc->base.bind_addr.address_list
198 : &ep->base.bind_addr 213 : &ep->base.bind_addr.address_list;
199 if (inet_diag_msg_sctpladdrs_fill(skb, 214 if (inet_diag_msg_sctpladdrs_fill(skb, addr_list))
200 goto errout; 215 goto errout;
201 216
202 if (asoc && (ext & (1 << (INET_DIAG_CO 217 if (asoc && (ext & (1 << (INET_DIAG_CONG - 1))))
203 if (nla_put_string(skb, INET_D 218 if (nla_put_string(skb, INET_DIAG_CONG, "reno") < 0)
204 goto errout; 219 goto errout;
205 220
206 if (asoc && inet_diag_msg_sctpaddrs_fi 221 if (asoc && inet_diag_msg_sctpaddrs_fill(skb, asoc))
207 goto errout; 222 goto errout;
208 223
209 nlmsg_end(skb, nlh); 224 nlmsg_end(skb, nlh);
210 return 0; 225 return 0;
211 226
212 errout: 227 errout:
213 nlmsg_cancel(skb, nlh); 228 nlmsg_cancel(skb, nlh);
214 return -EMSGSIZE; 229 return -EMSGSIZE;
215 } 230 }
216 231
217 /* callback and param */ 232 /* callback and param */
218 struct sctp_comm_param { 233 struct sctp_comm_param {
219 struct sk_buff *skb; 234 struct sk_buff *skb;
220 struct netlink_callback *cb; 235 struct netlink_callback *cb;
221 const struct inet_diag_req_v2 *r; 236 const struct inet_diag_req_v2 *r;
222 const struct nlmsghdr *nlh; 237 const struct nlmsghdr *nlh;
223 bool net_admin; 238 bool net_admin;
224 }; 239 };
225 240
226 static size_t inet_assoc_attr_size(struct sctp 241 static size_t inet_assoc_attr_size(struct sctp_association *asoc)
227 { 242 {
228 int addrlen = sizeof(struct sockaddr_s 243 int addrlen = sizeof(struct sockaddr_storage);
229 int addrcnt = 0; 244 int addrcnt = 0;
230 struct sctp_sockaddr_entry *laddr; 245 struct sctp_sockaddr_entry *laddr;
231 246
232 list_for_each_entry_rcu(laddr, &asoc-> 247 list_for_each_entry_rcu(laddr, &asoc->base.bind_addr.address_list,
233 list) 248 list)
234 addrcnt++; 249 addrcnt++;
235 250
236 return nla_total_size(sizeof(struct 251 return nla_total_size(sizeof(struct sctp_info))
237 + nla_total_size(addrlen * aso 252 + nla_total_size(addrlen * asoc->peer.transport_count)
238 + nla_total_size(addrlen * add 253 + nla_total_size(addrlen * addrcnt)
239 + nla_total_size(sizeof(struct 254 + nla_total_size(sizeof(struct inet_diag_msg))
240 + inet_diag_msg_attrs_size() 255 + inet_diag_msg_attrs_size()
241 + nla_total_size(sizeof(struct 256 + nla_total_size(sizeof(struct inet_diag_meminfo))
242 + 64; 257 + 64;
243 } 258 }
244 259
245 static int sctp_sock_dump_one(struct sctp_endp !! 260 static int sctp_tsp_dump_one(struct sctp_transport *tsp, void *p)
246 { 261 {
247 struct sctp_association *assoc = tsp-> 262 struct sctp_association *assoc = tsp->asoc;
>> 263 struct sock *sk = tsp->asoc->base.sk;
248 struct sctp_comm_param *commp = p; 264 struct sctp_comm_param *commp = p;
249 struct sock *sk = ep->base.sk; !! 265 struct sk_buff *in_skb = commp->skb;
250 const struct inet_diag_req_v2 *req = c 266 const struct inet_diag_req_v2 *req = commp->r;
251 struct sk_buff *skb = commp->skb; !! 267 const struct nlmsghdr *nlh = commp->nlh;
>> 268 struct net *net = sock_net(in_skb->sk);
252 struct sk_buff *rep; 269 struct sk_buff *rep;
253 int err; 270 int err;
254 271
255 err = sock_diag_check_cookie(sk, req-> 272 err = sock_diag_check_cookie(sk, req->id.idiag_cookie);
256 if (err) 273 if (err)
257 return err; !! 274 goto out;
258 275
>> 276 err = -ENOMEM;
259 rep = nlmsg_new(inet_assoc_attr_size(a 277 rep = nlmsg_new(inet_assoc_attr_size(assoc), GFP_KERNEL);
260 if (!rep) 278 if (!rep)
261 return -ENOMEM; <<
262 <<
263 lock_sock(sk); <<
264 if (ep != assoc->ep) { <<
265 err = -EAGAIN; <<
266 goto out; 279 goto out;
267 } <<
268 280
269 err = inet_sctp_diag_fill(sk, assoc, r !! 281 lock_sock(sk);
270 NETLINK_CB(s !! 282 if (sk != assoc->base.sk) {
271 commp->nlh, !! 283 release_sock(sk);
>> 284 sk = assoc->base.sk;
>> 285 lock_sock(sk);
>> 286 }
>> 287 err = inet_sctp_diag_fill(sk, assoc, rep, req,
>> 288 sk_user_ns(NETLINK_CB(in_skb).sk),
>> 289 NETLINK_CB(in_skb).portid,
>> 290 nlh->nlmsg_seq, 0, nlh,
>> 291 commp->net_admin);
>> 292 release_sock(sk);
272 if (err < 0) { 293 if (err < 0) {
273 WARN_ON(err == -EMSGSIZE); 294 WARN_ON(err == -EMSGSIZE);
>> 295 kfree_skb(rep);
274 goto out; 296 goto out;
275 } 297 }
276 release_sock(sk); <<
277 <<
278 return nlmsg_unicast(sock_net(skb->sk) <<
279 298
>> 299 err = netlink_unicast(net->diag_nlsk, rep, NETLINK_CB(in_skb).portid,
>> 300 MSG_DONTWAIT);
>> 301 if (err > 0)
>> 302 err = 0;
280 out: 303 out:
281 release_sock(sk); <<
282 kfree_skb(rep); <<
283 return err; 304 return err;
284 } 305 }
285 306
286 static int sctp_sock_dump(struct sctp_endpoint 307 static int sctp_sock_dump(struct sctp_endpoint *ep, struct sctp_transport *tsp, void *p)
287 { 308 {
288 struct sctp_comm_param *commp = p; 309 struct sctp_comm_param *commp = p;
289 struct sock *sk = ep->base.sk; 310 struct sock *sk = ep->base.sk;
290 struct sk_buff *skb = commp->skb; 311 struct sk_buff *skb = commp->skb;
291 struct netlink_callback *cb = commp->c 312 struct netlink_callback *cb = commp->cb;
292 const struct inet_diag_req_v2 *r = com 313 const struct inet_diag_req_v2 *r = commp->r;
293 struct sctp_association *assoc; 314 struct sctp_association *assoc;
294 int err = 0; 315 int err = 0;
295 316
296 lock_sock(sk); 317 lock_sock(sk);
297 if (ep != tsp->asoc->ep) 318 if (ep != tsp->asoc->ep)
298 goto release; 319 goto release;
299 list_for_each_entry(assoc, &ep->asocs, 320 list_for_each_entry(assoc, &ep->asocs, asocs) {
300 if (cb->args[4] < cb->args[1]) 321 if (cb->args[4] < cb->args[1])
301 goto next; 322 goto next;
302 323
303 if (r->id.idiag_sport != htons 324 if (r->id.idiag_sport != htons(assoc->base.bind_addr.port) &&
304 r->id.idiag_sport) 325 r->id.idiag_sport)
305 goto next; 326 goto next;
306 if (r->id.idiag_dport != htons 327 if (r->id.idiag_dport != htons(assoc->peer.port) &&
307 r->id.idiag_dport) 328 r->id.idiag_dport)
308 goto next; 329 goto next;
309 330
310 if (!cb->args[3] && 331 if (!cb->args[3] &&
311 inet_sctp_diag_fill(sk, NU 332 inet_sctp_diag_fill(sk, NULL, skb, r,
312 sk_use 333 sk_user_ns(NETLINK_CB(cb->skb).sk),
313 NETLIN 334 NETLINK_CB(cb->skb).portid,
314 cb->nl 335 cb->nlh->nlmsg_seq,
315 NLM_F_ 336 NLM_F_MULTI, cb->nlh,
316 commp- 337 commp->net_admin) < 0) {
317 err = 1; 338 err = 1;
318 goto release; 339 goto release;
319 } 340 }
320 cb->args[3] = 1; 341 cb->args[3] = 1;
321 342
322 if (inet_sctp_diag_fill(sk, as 343 if (inet_sctp_diag_fill(sk, assoc, skb, r,
323 sk_use 344 sk_user_ns(NETLINK_CB(cb->skb).sk),
324 NETLIN 345 NETLINK_CB(cb->skb).portid,
325 cb->nl 346 cb->nlh->nlmsg_seq, 0, cb->nlh,
326 commp- 347 commp->net_admin) < 0) {
327 err = 1; 348 err = 1;
328 goto release; 349 goto release;
329 } 350 }
330 next: 351 next:
331 cb->args[4]++; 352 cb->args[4]++;
332 } 353 }
333 cb->args[1] = 0; 354 cb->args[1] = 0;
334 cb->args[3] = 0; 355 cb->args[3] = 0;
335 cb->args[4] = 0; 356 cb->args[4] = 0;
336 release: 357 release:
337 release_sock(sk); 358 release_sock(sk);
338 return err; 359 return err;
339 } 360 }
340 361
341 static int sctp_sock_filter(struct sctp_endpoi 362 static int sctp_sock_filter(struct sctp_endpoint *ep, struct sctp_transport *tsp, void *p)
342 { 363 {
343 struct sctp_comm_param *commp = p; 364 struct sctp_comm_param *commp = p;
344 struct sock *sk = ep->base.sk; 365 struct sock *sk = ep->base.sk;
345 const struct inet_diag_req_v2 *r = com 366 const struct inet_diag_req_v2 *r = commp->r;
>> 367 struct sctp_association *assoc =
>> 368 list_entry(ep->asocs.next, struct sctp_association, asocs);
346 369
347 /* find the ep only once through the t 370 /* find the ep only once through the transports by this condition */
348 if (!list_is_first(&tsp->asoc->asocs, !! 371 if (tsp->asoc != assoc)
349 return 0; 372 return 0;
350 373
351 if (r->sdiag_family != AF_UNSPEC && sk 374 if (r->sdiag_family != AF_UNSPEC && sk->sk_family != r->sdiag_family)
352 return 0; 375 return 0;
353 376
354 return 1; 377 return 1;
355 } 378 }
356 379
357 static int sctp_ep_dump(struct sctp_endpoint * 380 static int sctp_ep_dump(struct sctp_endpoint *ep, void *p)
358 { 381 {
359 struct sctp_comm_param *commp = p; 382 struct sctp_comm_param *commp = p;
360 struct sock *sk = ep->base.sk; 383 struct sock *sk = ep->base.sk;
361 struct sk_buff *skb = commp->skb; 384 struct sk_buff *skb = commp->skb;
362 struct netlink_callback *cb = commp->c 385 struct netlink_callback *cb = commp->cb;
363 const struct inet_diag_req_v2 *r = com 386 const struct inet_diag_req_v2 *r = commp->r;
364 struct net *net = sock_net(skb->sk); 387 struct net *net = sock_net(skb->sk);
365 struct inet_sock *inet = inet_sk(sk); 388 struct inet_sock *inet = inet_sk(sk);
366 int err = 0; 389 int err = 0;
367 390
368 if (!net_eq(sock_net(sk), net)) 391 if (!net_eq(sock_net(sk), net))
369 goto out; 392 goto out;
370 393
371 if (cb->args[4] < cb->args[1]) 394 if (cb->args[4] < cb->args[1])
372 goto next; 395 goto next;
373 396
374 if (!(r->idiag_states & TCPF_LISTEN) & 397 if (!(r->idiag_states & TCPF_LISTEN) && !list_empty(&ep->asocs))
375 goto next; 398 goto next;
376 399
377 if (r->sdiag_family != AF_UNSPEC && 400 if (r->sdiag_family != AF_UNSPEC &&
378 sk->sk_family != r->sdiag_family) 401 sk->sk_family != r->sdiag_family)
379 goto next; 402 goto next;
380 403
381 if (r->id.idiag_sport != inet->inet_sp 404 if (r->id.idiag_sport != inet->inet_sport &&
382 r->id.idiag_sport) 405 r->id.idiag_sport)
383 goto next; 406 goto next;
384 407
385 if (r->id.idiag_dport != inet->inet_dp 408 if (r->id.idiag_dport != inet->inet_dport &&
386 r->id.idiag_dport) 409 r->id.idiag_dport)
387 goto next; 410 goto next;
388 411
389 if (inet_sctp_diag_fill(sk, NULL, skb, 412 if (inet_sctp_diag_fill(sk, NULL, skb, r,
390 sk_user_ns(NET 413 sk_user_ns(NETLINK_CB(cb->skb).sk),
391 NETLINK_CB(cb- 414 NETLINK_CB(cb->skb).portid,
392 cb->nlh->nlmsg 415 cb->nlh->nlmsg_seq, NLM_F_MULTI,
393 cb->nlh, commp 416 cb->nlh, commp->net_admin) < 0) {
394 err = 2; 417 err = 2;
395 goto out; 418 goto out;
396 } 419 }
397 next: 420 next:
398 cb->args[4]++; 421 cb->args[4]++;
399 out: 422 out:
400 return err; 423 return err;
401 } 424 }
402 425
403 /* define the functions for sctp_diag_handler* 426 /* define the functions for sctp_diag_handler*/
404 static void sctp_diag_get_info(struct sock *sk 427 static void sctp_diag_get_info(struct sock *sk, struct inet_diag_msg *r,
405 void *info) 428 void *info)
406 { 429 {
407 struct sctp_infox *infox = (struct sct 430 struct sctp_infox *infox = (struct sctp_infox *)info;
408 431
409 if (infox->asoc) { 432 if (infox->asoc) {
410 r->idiag_rqueue = atomic_read( 433 r->idiag_rqueue = atomic_read(&infox->asoc->rmem_alloc);
411 r->idiag_wqueue = infox->asoc- 434 r->idiag_wqueue = infox->asoc->sndbuf_used;
412 } else { 435 } else {
413 r->idiag_rqueue = READ_ONCE(sk !! 436 r->idiag_rqueue = sk->sk_ack_backlog;
414 r->idiag_wqueue = READ_ONCE(sk !! 437 r->idiag_wqueue = sk->sk_max_ack_backlog;
415 } 438 }
416 if (infox->sctpinfo) 439 if (infox->sctpinfo)
417 sctp_get_sctp_info(sk, infox-> 440 sctp_get_sctp_info(sk, infox->asoc, infox->sctpinfo);
418 } 441 }
419 442
420 static int sctp_diag_dump_one(struct netlink_c !! 443 static int sctp_diag_dump_one(struct sk_buff *in_skb,
>> 444 const struct nlmsghdr *nlh,
421 const struct ine 445 const struct inet_diag_req_v2 *req)
422 { 446 {
423 struct sk_buff *skb = cb->skb; !! 447 struct net *net = sock_net(in_skb->sk);
424 struct net *net = sock_net(skb->sk); <<
425 const struct nlmsghdr *nlh = cb->nlh; <<
426 union sctp_addr laddr, paddr; 448 union sctp_addr laddr, paddr;
427 int dif = req->id.idiag_if; <<
428 struct sctp_comm_param commp = { 449 struct sctp_comm_param commp = {
429 .skb = skb, !! 450 .skb = in_skb,
430 .r = req, 451 .r = req,
431 .nlh = nlh, 452 .nlh = nlh,
432 .net_admin = netlink_net_capab !! 453 .net_admin = netlink_net_capable(in_skb, CAP_NET_ADMIN),
433 }; 454 };
434 455
435 if (req->sdiag_family == AF_INET) { 456 if (req->sdiag_family == AF_INET) {
436 laddr.v4.sin_port = req->id.id 457 laddr.v4.sin_port = req->id.idiag_sport;
437 laddr.v4.sin_addr.s_addr = req 458 laddr.v4.sin_addr.s_addr = req->id.idiag_src[0];
438 laddr.v4.sin_family = AF_INET; 459 laddr.v4.sin_family = AF_INET;
439 460
440 paddr.v4.sin_port = req->id.id 461 paddr.v4.sin_port = req->id.idiag_dport;
441 paddr.v4.sin_addr.s_addr = req 462 paddr.v4.sin_addr.s_addr = req->id.idiag_dst[0];
442 paddr.v4.sin_family = AF_INET; 463 paddr.v4.sin_family = AF_INET;
443 } else { 464 } else {
444 laddr.v6.sin6_port = req->id.i 465 laddr.v6.sin6_port = req->id.idiag_sport;
445 memcpy(&laddr.v6.sin6_addr, re 466 memcpy(&laddr.v6.sin6_addr, req->id.idiag_src,
446 sizeof(laddr.v6.sin6_ad 467 sizeof(laddr.v6.sin6_addr));
447 laddr.v6.sin6_family = AF_INET 468 laddr.v6.sin6_family = AF_INET6;
448 469
449 paddr.v6.sin6_port = req->id.i 470 paddr.v6.sin6_port = req->id.idiag_dport;
450 memcpy(&paddr.v6.sin6_addr, re 471 memcpy(&paddr.v6.sin6_addr, req->id.idiag_dst,
451 sizeof(paddr.v6.sin6_ad 472 sizeof(paddr.v6.sin6_addr));
452 paddr.v6.sin6_family = AF_INET 473 paddr.v6.sin6_family = AF_INET6;
453 } 474 }
454 475
455 return sctp_transport_lookup_process(s !! 476 return sctp_transport_lookup_process(sctp_tsp_dump_one,
456 n !! 477 net, &laddr, &paddr, &commp);
457 } 478 }
458 479
459 static void sctp_diag_dump(struct sk_buff *skb 480 static void sctp_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
460 const struct inet_d !! 481 const struct inet_diag_req_v2 *r, struct nlattr *bc)
461 { 482 {
462 u32 idiag_states = r->idiag_states; 483 u32 idiag_states = r->idiag_states;
463 struct net *net = sock_net(skb->sk); 484 struct net *net = sock_net(skb->sk);
464 struct sctp_comm_param commp = { 485 struct sctp_comm_param commp = {
465 .skb = skb, 486 .skb = skb,
466 .cb = cb, 487 .cb = cb,
467 .r = r, 488 .r = r,
468 .net_admin = netlink_net_capab 489 .net_admin = netlink_net_capable(cb->skb, CAP_NET_ADMIN),
469 }; 490 };
470 int pos = cb->args[2]; 491 int pos = cb->args[2];
471 492
472 /* eps hashtable dumps 493 /* eps hashtable dumps
473 * args: 494 * args:
474 * 0 : if it will traversal listen soc 495 * 0 : if it will traversal listen sock
475 * 1 : to record the sock pos of this 496 * 1 : to record the sock pos of this time's traversal
476 * 4 : to work as a temporary variable 497 * 4 : to work as a temporary variable to traversal list
477 */ 498 */
478 if (cb->args[0] == 0) { 499 if (cb->args[0] == 0) {
479 if (!(idiag_states & TCPF_LIST 500 if (!(idiag_states & TCPF_LISTEN))
480 goto skip; 501 goto skip;
481 if (sctp_for_each_endpoint(sct 502 if (sctp_for_each_endpoint(sctp_ep_dump, &commp))
482 goto done; 503 goto done;
483 skip: 504 skip:
484 cb->args[0] = 1; 505 cb->args[0] = 1;
485 cb->args[1] = 0; 506 cb->args[1] = 0;
486 cb->args[4] = 0; 507 cb->args[4] = 0;
487 } 508 }
488 509
489 /* asocs by transport hashtable dump 510 /* asocs by transport hashtable dump
490 * args: 511 * args:
491 * 1 : to record the assoc pos of this 512 * 1 : to record the assoc pos of this time's traversal
492 * 2 : to record the transport pos of 513 * 2 : to record the transport pos of this time's traversal
493 * 3 : to mark if we have dumped the e 514 * 3 : to mark if we have dumped the ep info of the current asoc
494 * 4 : to work as a temporary variable 515 * 4 : to work as a temporary variable to traversal list
495 * 5 : to save the sk we get from trav 516 * 5 : to save the sk we get from travelsing the tsp list.
496 */ 517 */
497 if (!(idiag_states & ~(TCPF_LISTEN | T 518 if (!(idiag_states & ~(TCPF_LISTEN | TCPF_CLOSE)))
498 goto done; 519 goto done;
499 520
500 sctp_transport_traverse_process(sctp_s 521 sctp_transport_traverse_process(sctp_sock_filter, sctp_sock_dump,
501 net, & 522 net, &pos, &commp);
502 cb->args[2] = pos; 523 cb->args[2] = pos;
503 524
504 done: 525 done:
505 cb->args[1] = cb->args[4]; 526 cb->args[1] = cb->args[4];
506 cb->args[4] = 0; 527 cb->args[4] = 0;
507 } 528 }
508 529
509 static const struct inet_diag_handler sctp_dia 530 static const struct inet_diag_handler sctp_diag_handler = {
510 .owner = THIS_MODULE, <<
511 .dump = sctp_diag_dump, 531 .dump = sctp_diag_dump,
512 .dump_one = sctp_diag_dump_one, 532 .dump_one = sctp_diag_dump_one,
513 .idiag_get_info = sctp_diag_get_info, 533 .idiag_get_info = sctp_diag_get_info,
514 .idiag_type = IPPROTO_SCTP, 534 .idiag_type = IPPROTO_SCTP,
515 .idiag_info_size = sizeof(struct sctp_ 535 .idiag_info_size = sizeof(struct sctp_info),
516 }; 536 };
517 537
518 static int __init sctp_diag_init(void) 538 static int __init sctp_diag_init(void)
519 { 539 {
520 return inet_diag_register(&sctp_diag_h 540 return inet_diag_register(&sctp_diag_handler);
521 } 541 }
522 542
523 static void __exit sctp_diag_exit(void) 543 static void __exit sctp_diag_exit(void)
524 { 544 {
525 inet_diag_unregister(&sctp_diag_handle 545 inet_diag_unregister(&sctp_diag_handler);
526 } 546 }
527 547
528 module_init(sctp_diag_init); 548 module_init(sctp_diag_init);
529 module_exit(sctp_diag_exit); 549 module_exit(sctp_diag_exit);
530 MODULE_LICENSE("GPL"); 550 MODULE_LICENSE("GPL");
531 MODULE_DESCRIPTION("SCTP socket monitoring via <<
532 MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NET 551 MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 2-132);
533 552
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