Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
73c1f4a0 | 2 | * inet_diag.c Module for monitoring INET transport protocols sockets. |
1da177e4 | 3 | * |
73c1f4a0 | 4 | * Version: $Id: inet_diag.c,v 1.3 2002/02/01 22:01:04 davem Exp $ |
1da177e4 LT |
5 | * |
6 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License | |
10 | * as published by the Free Software Foundation; either version | |
11 | * 2 of the License, or (at your option) any later version. | |
12 | */ | |
13 | ||
14 | #include <linux/config.h> | |
15 | #include <linux/module.h> | |
16 | #include <linux/types.h> | |
17 | #include <linux/fcntl.h> | |
18 | #include <linux/random.h> | |
19 | #include <linux/cache.h> | |
20 | #include <linux/init.h> | |
21 | #include <linux/time.h> | |
22 | ||
23 | #include <net/icmp.h> | |
24 | #include <net/tcp.h> | |
25 | #include <net/ipv6.h> | |
26 | #include <net/inet_common.h> | |
505cbfc5 ACM |
27 | #include <net/inet_connection_sock.h> |
28 | #include <net/inet_hashtables.h> | |
29 | #include <net/inet_timewait_sock.h> | |
30 | #include <net/inet6_hashtables.h> | |
1da177e4 LT |
31 | |
32 | #include <linux/inet.h> | |
33 | #include <linux/stddef.h> | |
34 | ||
35 | #include <linux/tcp_diag.h> | |
36 | ||
4f5736c4 ACM |
37 | static const struct inet_diag_handler **inet_diag_table; |
38 | ||
73c1f4a0 | 39 | struct inet_diag_entry { |
1da177e4 LT |
40 | u32 *saddr; |
41 | u32 *daddr; | |
42 | u16 sport; | |
43 | u16 dport; | |
44 | u16 family; | |
45 | u16 userlocks; | |
46 | }; | |
47 | ||
73c1f4a0 | 48 | static struct sock *idiagnl; |
1da177e4 | 49 | |
73c1f4a0 | 50 | #define INET_DIAG_PUT(skb, attrtype, attrlen) \ |
7c99c909 | 51 | RTA_DATA(__RTA_PUT(skb, attrtype, attrlen)) |
1da177e4 | 52 | |
73c1f4a0 | 53 | static int inet_diag_fill(struct sk_buff *skb, struct sock *sk, |
540722ff ACM |
54 | int ext, u32 pid, u32 seq, u16 nlmsg_flags, |
55 | const struct nlmsghdr *unlh) | |
1da177e4 | 56 | { |
463c84b9 | 57 | const struct inet_sock *inet = inet_sk(sk); |
463c84b9 | 58 | const struct inet_connection_sock *icsk = inet_csk(sk); |
73c1f4a0 | 59 | struct inet_diag_msg *r; |
1da177e4 | 60 | struct nlmsghdr *nlh; |
4f5736c4 | 61 | void *info = NULL; |
73c1f4a0 | 62 | struct inet_diag_meminfo *minfo = NULL; |
1da177e4 | 63 | unsigned char *b = skb->tail; |
4f5736c4 ACM |
64 | const struct inet_diag_handler *handler; |
65 | ||
66 | handler = inet_diag_table[unlh->nlmsg_type]; | |
67 | BUG_ON(handler == NULL); | |
1da177e4 | 68 | |
540722ff | 69 | nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r)); |
1da177e4 | 70 | nlh->nlmsg_flags = nlmsg_flags; |
4f5736c4 | 71 | |
1da177e4 LT |
72 | r = NLMSG_DATA(nlh); |
73 | if (sk->sk_state != TCP_TIME_WAIT) { | |
73c1f4a0 ACM |
74 | if (ext & (1 << (INET_DIAG_MEMINFO - 1))) |
75 | minfo = INET_DIAG_PUT(skb, INET_DIAG_MEMINFO, | |
76 | sizeof(*minfo)); | |
77 | if (ext & (1 << (INET_DIAG_INFO - 1))) | |
78 | info = INET_DIAG_PUT(skb, INET_DIAG_INFO, | |
4f5736c4 | 79 | handler->idiag_info_size); |
1da177e4 | 80 | |
73c1f4a0 | 81 | if ((ext & (1 << (INET_DIAG_CONG - 1))) && icsk->icsk_ca_ops) { |
6687e988 | 82 | size_t len = strlen(icsk->icsk_ca_ops->name); |
73c1f4a0 | 83 | strcpy(INET_DIAG_PUT(skb, INET_DIAG_CONG, len + 1), |
6687e988 | 84 | icsk->icsk_ca_ops->name); |
056ede6c | 85 | } |
1da177e4 | 86 | } |
73c1f4a0 ACM |
87 | r->idiag_family = sk->sk_family; |
88 | r->idiag_state = sk->sk_state; | |
89 | r->idiag_timer = 0; | |
90 | r->idiag_retrans = 0; | |
1da177e4 | 91 | |
73c1f4a0 ACM |
92 | r->id.idiag_if = sk->sk_bound_dev_if; |
93 | r->id.idiag_cookie[0] = (u32)(unsigned long)sk; | |
94 | r->id.idiag_cookie[1] = (u32)(((unsigned long)sk >> 31) >> 1); | |
1da177e4 | 95 | |
73c1f4a0 | 96 | if (r->idiag_state == TCP_TIME_WAIT) { |
8feaf0c0 | 97 | const struct inet_timewait_sock *tw = inet_twsk(sk); |
1da177e4 LT |
98 | long tmo = tw->tw_ttd - jiffies; |
99 | if (tmo < 0) | |
100 | tmo = 0; | |
101 | ||
73c1f4a0 ACM |
102 | r->id.idiag_sport = tw->tw_sport; |
103 | r->id.idiag_dport = tw->tw_dport; | |
104 | r->id.idiag_src[0] = tw->tw_rcv_saddr; | |
105 | r->id.idiag_dst[0] = tw->tw_daddr; | |
106 | r->idiag_state = tw->tw_substate; | |
107 | r->idiag_timer = 3; | |
108 | r->idiag_expires = (tmo * 1000 + HZ - 1) / HZ; | |
109 | r->idiag_rqueue = 0; | |
110 | r->idiag_wqueue = 0; | |
111 | r->idiag_uid = 0; | |
112 | r->idiag_inode = 0; | |
505cbfc5 | 113 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
73c1f4a0 | 114 | if (r->idiag_family == AF_INET6) { |
8feaf0c0 ACM |
115 | const struct tcp6_timewait_sock *tcp6tw = tcp6_twsk(sk); |
116 | ||
73c1f4a0 | 117 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_src, |
8feaf0c0 | 118 | &tcp6tw->tw_v6_rcv_saddr); |
73c1f4a0 | 119 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst, |
8feaf0c0 | 120 | &tcp6tw->tw_v6_daddr); |
1da177e4 LT |
121 | } |
122 | #endif | |
123 | nlh->nlmsg_len = skb->tail - b; | |
124 | return skb->len; | |
125 | } | |
126 | ||
73c1f4a0 ACM |
127 | r->id.idiag_sport = inet->sport; |
128 | r->id.idiag_dport = inet->dport; | |
129 | r->id.idiag_src[0] = inet->rcv_saddr; | |
130 | r->id.idiag_dst[0] = inet->daddr; | |
1da177e4 | 131 | |
505cbfc5 | 132 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
73c1f4a0 | 133 | if (r->idiag_family == AF_INET6) { |
1da177e4 LT |
134 | struct ipv6_pinfo *np = inet6_sk(sk); |
135 | ||
73c1f4a0 | 136 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_src, |
1da177e4 | 137 | &np->rcv_saddr); |
73c1f4a0 | 138 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst, |
1da177e4 LT |
139 | &np->daddr); |
140 | } | |
141 | #endif | |
142 | ||
143 | #define EXPIRES_IN_MS(tmo) ((tmo-jiffies)*1000+HZ-1)/HZ | |
144 | ||
463c84b9 | 145 | if (icsk->icsk_pending == ICSK_TIME_RETRANS) { |
73c1f4a0 ACM |
146 | r->idiag_timer = 1; |
147 | r->idiag_retrans = icsk->icsk_retransmits; | |
148 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); | |
463c84b9 | 149 | } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) { |
73c1f4a0 ACM |
150 | r->idiag_timer = 4; |
151 | r->idiag_retrans = icsk->icsk_probes_out; | |
152 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); | |
1da177e4 | 153 | } else if (timer_pending(&sk->sk_timer)) { |
73c1f4a0 ACM |
154 | r->idiag_timer = 2; |
155 | r->idiag_retrans = icsk->icsk_probes_out; | |
156 | r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires); | |
1da177e4 | 157 | } else { |
73c1f4a0 ACM |
158 | r->idiag_timer = 0; |
159 | r->idiag_expires = 0; | |
1da177e4 LT |
160 | } |
161 | #undef EXPIRES_IN_MS | |
540722ff | 162 | |
73c1f4a0 ACM |
163 | r->idiag_uid = sock_i_uid(sk); |
164 | r->idiag_inode = sock_i_ino(sk); | |
1da177e4 LT |
165 | |
166 | if (minfo) { | |
73c1f4a0 ACM |
167 | minfo->idiag_rmem = atomic_read(&sk->sk_rmem_alloc); |
168 | minfo->idiag_wmem = sk->sk_wmem_queued; | |
169 | minfo->idiag_fmem = sk->sk_forward_alloc; | |
170 | minfo->idiag_tmem = atomic_read(&sk->sk_wmem_alloc); | |
1da177e4 LT |
171 | } |
172 | ||
4f5736c4 | 173 | handler->idiag_get_info(sk, r, info); |
1da177e4 | 174 | |
6687e988 ACM |
175 | if (sk->sk_state < TCP_TIME_WAIT && |
176 | icsk->icsk_ca_ops && icsk->icsk_ca_ops->get_info) | |
177 | icsk->icsk_ca_ops->get_info(sk, ext, skb); | |
1da177e4 LT |
178 | |
179 | nlh->nlmsg_len = skb->tail - b; | |
180 | return skb->len; | |
181 | ||
7c99c909 | 182 | rtattr_failure: |
1da177e4 LT |
183 | nlmsg_failure: |
184 | skb_trim(skb, b - skb->data); | |
185 | return -1; | |
186 | } | |
187 | ||
73c1f4a0 | 188 | static int inet_diag_get_exact(struct sk_buff *in_skb, const struct nlmsghdr *nlh) |
1da177e4 LT |
189 | { |
190 | int err; | |
191 | struct sock *sk; | |
73c1f4a0 | 192 | struct inet_diag_req *req = NLMSG_DATA(nlh); |
1da177e4 | 193 | struct sk_buff *rep; |
4f5736c4 ACM |
194 | struct inet_hashinfo *hashinfo; |
195 | const struct inet_diag_handler *handler; | |
196 | ||
197 | handler = inet_diag_table[nlh->nlmsg_type]; | |
198 | BUG_ON(handler == NULL); | |
199 | hashinfo = handler->idiag_hashinfo; | |
200 | ||
73c1f4a0 ACM |
201 | if (req->idiag_family == AF_INET) { |
202 | sk = inet_lookup(hashinfo, req->id.idiag_dst[0], | |
203 | req->id.idiag_dport, req->id.idiag_src[0], | |
204 | req->id.idiag_sport, req->id.idiag_if); | |
1da177e4 | 205 | } |
505cbfc5 | 206 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
73c1f4a0 | 207 | else if (req->idiag_family == AF_INET6) { |
505cbfc5 | 208 | sk = inet6_lookup(hashinfo, |
73c1f4a0 ACM |
209 | (struct in6_addr *)req->id.idiag_dst, |
210 | req->id.idiag_dport, | |
211 | (struct in6_addr *)req->id.idiag_src, | |
212 | req->id.idiag_sport, | |
213 | req->id.idiag_if); | |
1da177e4 LT |
214 | } |
215 | #endif | |
216 | else { | |
217 | return -EINVAL; | |
218 | } | |
219 | ||
220 | if (sk == NULL) | |
221 | return -ENOENT; | |
222 | ||
223 | err = -ESTALE; | |
73c1f4a0 ACM |
224 | if ((req->id.idiag_cookie[0] != INET_DIAG_NOCOOKIE || |
225 | req->id.idiag_cookie[1] != INET_DIAG_NOCOOKIE) && | |
226 | ((u32)(unsigned long)sk != req->id.idiag_cookie[0] || | |
227 | (u32)((((unsigned long)sk) >> 31) >> 1) != req->id.idiag_cookie[1])) | |
1da177e4 LT |
228 | goto out; |
229 | ||
230 | err = -ENOMEM; | |
73c1f4a0 ACM |
231 | rep = alloc_skb(NLMSG_SPACE((sizeof(struct inet_diag_msg) + |
232 | sizeof(struct inet_diag_meminfo) + | |
4f5736c4 ACM |
233 | handler->idiag_info_size + 64)), |
234 | GFP_KERNEL); | |
1da177e4 LT |
235 | if (!rep) |
236 | goto out; | |
237 | ||
73c1f4a0 | 238 | if (inet_diag_fill(rep, sk, req->idiag_ext, |
1da177e4 | 239 | NETLINK_CB(in_skb).pid, |
540722ff | 240 | nlh->nlmsg_seq, 0, nlh) <= 0) |
1da177e4 LT |
241 | BUG(); |
242 | ||
73c1f4a0 ACM |
243 | err = netlink_unicast(idiagnl, rep, NETLINK_CB(in_skb).pid, |
244 | MSG_DONTWAIT); | |
1da177e4 LT |
245 | if (err > 0) |
246 | err = 0; | |
247 | ||
248 | out: | |
249 | if (sk) { | |
250 | if (sk->sk_state == TCP_TIME_WAIT) | |
8feaf0c0 | 251 | inet_twsk_put((struct inet_timewait_sock *)sk); |
1da177e4 LT |
252 | else |
253 | sock_put(sk); | |
254 | } | |
255 | return err; | |
256 | } | |
257 | ||
258 | static int bitstring_match(const u32 *a1, const u32 *a2, int bits) | |
259 | { | |
260 | int words = bits >> 5; | |
261 | ||
262 | bits &= 0x1f; | |
263 | ||
264 | if (words) { | |
265 | if (memcmp(a1, a2, words << 2)) | |
266 | return 0; | |
267 | } | |
268 | if (bits) { | |
269 | __u32 w1, w2; | |
270 | __u32 mask; | |
271 | ||
272 | w1 = a1[words]; | |
273 | w2 = a2[words]; | |
274 | ||
275 | mask = htonl((0xffffffff) << (32 - bits)); | |
276 | ||
277 | if ((w1 ^ w2) & mask) | |
278 | return 0; | |
279 | } | |
280 | ||
281 | return 1; | |
282 | } | |
283 | ||
284 | ||
73c1f4a0 ACM |
285 | static int inet_diag_bc_run(const void *bc, int len, |
286 | const struct inet_diag_entry *entry) | |
1da177e4 LT |
287 | { |
288 | while (len > 0) { | |
289 | int yes = 1; | |
73c1f4a0 | 290 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
291 | |
292 | switch (op->code) { | |
73c1f4a0 | 293 | case INET_DIAG_BC_NOP: |
1da177e4 | 294 | break; |
73c1f4a0 | 295 | case INET_DIAG_BC_JMP: |
1da177e4 LT |
296 | yes = 0; |
297 | break; | |
73c1f4a0 | 298 | case INET_DIAG_BC_S_GE: |
1da177e4 LT |
299 | yes = entry->sport >= op[1].no; |
300 | break; | |
73c1f4a0 | 301 | case INET_DIAG_BC_S_LE: |
1da177e4 LT |
302 | yes = entry->dport <= op[1].no; |
303 | break; | |
73c1f4a0 | 304 | case INET_DIAG_BC_D_GE: |
1da177e4 LT |
305 | yes = entry->dport >= op[1].no; |
306 | break; | |
73c1f4a0 | 307 | case INET_DIAG_BC_D_LE: |
1da177e4 LT |
308 | yes = entry->dport <= op[1].no; |
309 | break; | |
73c1f4a0 | 310 | case INET_DIAG_BC_AUTO: |
1da177e4 LT |
311 | yes = !(entry->userlocks & SOCK_BINDPORT_LOCK); |
312 | break; | |
73c1f4a0 ACM |
313 | case INET_DIAG_BC_S_COND: |
314 | case INET_DIAG_BC_D_COND: | |
1da177e4 | 315 | { |
73c1f4a0 | 316 | struct inet_diag_hostcond *cond = (struct inet_diag_hostcond*)(op+1); |
1da177e4 LT |
317 | u32 *addr; |
318 | ||
319 | if (cond->port != -1 && | |
73c1f4a0 | 320 | cond->port != (op->code == INET_DIAG_BC_S_COND ? |
1da177e4 LT |
321 | entry->sport : entry->dport)) { |
322 | yes = 0; | |
323 | break; | |
324 | } | |
325 | ||
326 | if (cond->prefix_len == 0) | |
327 | break; | |
328 | ||
73c1f4a0 | 329 | if (op->code == INET_DIAG_BC_S_COND) |
1da177e4 LT |
330 | addr = entry->saddr; |
331 | else | |
332 | addr = entry->daddr; | |
333 | ||
334 | if (bitstring_match(addr, cond->addr, cond->prefix_len)) | |
335 | break; | |
336 | if (entry->family == AF_INET6 && | |
337 | cond->family == AF_INET) { | |
338 | if (addr[0] == 0 && addr[1] == 0 && | |
339 | addr[2] == htonl(0xffff) && | |
340 | bitstring_match(addr+3, cond->addr, cond->prefix_len)) | |
341 | break; | |
342 | } | |
343 | yes = 0; | |
344 | break; | |
345 | } | |
346 | } | |
347 | ||
348 | if (yes) { | |
349 | len -= op->yes; | |
350 | bc += op->yes; | |
351 | } else { | |
352 | len -= op->no; | |
353 | bc += op->no; | |
354 | } | |
355 | } | |
356 | return (len == 0); | |
357 | } | |
358 | ||
359 | static int valid_cc(const void *bc, int len, int cc) | |
360 | { | |
361 | while (len >= 0) { | |
73c1f4a0 | 362 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
363 | |
364 | if (cc > len) | |
365 | return 0; | |
366 | if (cc == len) | |
367 | return 1; | |
368 | if (op->yes < 4) | |
369 | return 0; | |
370 | len -= op->yes; | |
371 | bc += op->yes; | |
372 | } | |
373 | return 0; | |
374 | } | |
375 | ||
73c1f4a0 | 376 | static int inet_diag_bc_audit(const void *bytecode, int bytecode_len) |
1da177e4 LT |
377 | { |
378 | const unsigned char *bc = bytecode; | |
379 | int len = bytecode_len; | |
380 | ||
381 | while (len > 0) { | |
73c1f4a0 | 382 | struct inet_diag_bc_op *op = (struct inet_diag_bc_op*)bc; |
1da177e4 LT |
383 | |
384 | //printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len); | |
385 | switch (op->code) { | |
73c1f4a0 ACM |
386 | case INET_DIAG_BC_AUTO: |
387 | case INET_DIAG_BC_S_COND: | |
388 | case INET_DIAG_BC_D_COND: | |
389 | case INET_DIAG_BC_S_GE: | |
390 | case INET_DIAG_BC_S_LE: | |
391 | case INET_DIAG_BC_D_GE: | |
392 | case INET_DIAG_BC_D_LE: | |
1da177e4 LT |
393 | if (op->yes < 4 || op->yes > len+4) |
394 | return -EINVAL; | |
73c1f4a0 | 395 | case INET_DIAG_BC_JMP: |
1da177e4 LT |
396 | if (op->no < 4 || op->no > len+4) |
397 | return -EINVAL; | |
398 | if (op->no < len && | |
399 | !valid_cc(bytecode, bytecode_len, len-op->no)) | |
400 | return -EINVAL; | |
401 | break; | |
73c1f4a0 | 402 | case INET_DIAG_BC_NOP: |
1da177e4 LT |
403 | if (op->yes < 4 || op->yes > len+4) |
404 | return -EINVAL; | |
405 | break; | |
406 | default: | |
407 | return -EINVAL; | |
408 | } | |
409 | bc += op->yes; | |
410 | len -= op->yes; | |
411 | } | |
412 | return len == 0 ? 0 : -EINVAL; | |
413 | } | |
414 | ||
73c1f4a0 | 415 | static int inet_diag_dump_sock(struct sk_buff *skb, struct sock *sk, |
1da177e4 LT |
416 | struct netlink_callback *cb) |
417 | { | |
73c1f4a0 | 418 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); |
1da177e4 LT |
419 | |
420 | if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) { | |
73c1f4a0 | 421 | struct inet_diag_entry entry; |
1da177e4 LT |
422 | struct rtattr *bc = (struct rtattr *)(r + 1); |
423 | struct inet_sock *inet = inet_sk(sk); | |
424 | ||
425 | entry.family = sk->sk_family; | |
505cbfc5 | 426 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
1da177e4 LT |
427 | if (entry.family == AF_INET6) { |
428 | struct ipv6_pinfo *np = inet6_sk(sk); | |
429 | ||
430 | entry.saddr = np->rcv_saddr.s6_addr32; | |
431 | entry.daddr = np->daddr.s6_addr32; | |
432 | } else | |
433 | #endif | |
434 | { | |
435 | entry.saddr = &inet->rcv_saddr; | |
436 | entry.daddr = &inet->daddr; | |
437 | } | |
438 | entry.sport = inet->num; | |
439 | entry.dport = ntohs(inet->dport); | |
440 | entry.userlocks = sk->sk_userlocks; | |
441 | ||
73c1f4a0 | 442 | if (!inet_diag_bc_run(RTA_DATA(bc), RTA_PAYLOAD(bc), &entry)) |
1da177e4 LT |
443 | return 0; |
444 | } | |
445 | ||
73c1f4a0 | 446 | return inet_diag_fill(skb, sk, r->idiag_ext, NETLINK_CB(cb->skb).pid, |
540722ff | 447 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); |
1da177e4 LT |
448 | } |
449 | ||
73c1f4a0 | 450 | static int inet_diag_fill_req(struct sk_buff *skb, struct sock *sk, |
60236fdd | 451 | struct request_sock *req, |
540722ff ACM |
452 | u32 pid, u32 seq, |
453 | const struct nlmsghdr *unlh) | |
1da177e4 | 454 | { |
2e6599cb | 455 | const struct inet_request_sock *ireq = inet_rsk(req); |
1da177e4 LT |
456 | struct inet_sock *inet = inet_sk(sk); |
457 | unsigned char *b = skb->tail; | |
73c1f4a0 | 458 | struct inet_diag_msg *r; |
1da177e4 LT |
459 | struct nlmsghdr *nlh; |
460 | long tmo; | |
461 | ||
540722ff | 462 | nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r)); |
1da177e4 LT |
463 | nlh->nlmsg_flags = NLM_F_MULTI; |
464 | r = NLMSG_DATA(nlh); | |
465 | ||
73c1f4a0 ACM |
466 | r->idiag_family = sk->sk_family; |
467 | r->idiag_state = TCP_SYN_RECV; | |
468 | r->idiag_timer = 1; | |
469 | r->idiag_retrans = req->retrans; | |
1da177e4 | 470 | |
73c1f4a0 ACM |
471 | r->id.idiag_if = sk->sk_bound_dev_if; |
472 | r->id.idiag_cookie[0] = (u32)(unsigned long)req; | |
473 | r->id.idiag_cookie[1] = (u32)(((unsigned long)req >> 31) >> 1); | |
1da177e4 LT |
474 | |
475 | tmo = req->expires - jiffies; | |
476 | if (tmo < 0) | |
477 | tmo = 0; | |
478 | ||
73c1f4a0 ACM |
479 | r->id.idiag_sport = inet->sport; |
480 | r->id.idiag_dport = ireq->rmt_port; | |
481 | r->id.idiag_src[0] = ireq->loc_addr; | |
482 | r->id.idiag_dst[0] = ireq->rmt_addr; | |
483 | r->idiag_expires = jiffies_to_msecs(tmo); | |
484 | r->idiag_rqueue = 0; | |
485 | r->idiag_wqueue = 0; | |
486 | r->idiag_uid = sock_i_uid(sk); | |
487 | r->idiag_inode = 0; | |
505cbfc5 | 488 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
73c1f4a0 ACM |
489 | if (r->idiag_family == AF_INET6) { |
490 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_src, | |
2e6599cb | 491 | &tcp6_rsk(req)->loc_addr); |
73c1f4a0 | 492 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst, |
2e6599cb | 493 | &tcp6_rsk(req)->rmt_addr); |
1da177e4 LT |
494 | } |
495 | #endif | |
496 | nlh->nlmsg_len = skb->tail - b; | |
497 | ||
498 | return skb->len; | |
499 | ||
500 | nlmsg_failure: | |
501 | skb_trim(skb, b - skb->data); | |
502 | return -1; | |
503 | } | |
504 | ||
73c1f4a0 | 505 | static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk, |
1da177e4 LT |
506 | struct netlink_callback *cb) |
507 | { | |
73c1f4a0 ACM |
508 | struct inet_diag_entry entry; |
509 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); | |
463c84b9 | 510 | struct inet_connection_sock *icsk = inet_csk(sk); |
2ad69c55 | 511 | struct listen_sock *lopt; |
1da177e4 LT |
512 | struct rtattr *bc = NULL; |
513 | struct inet_sock *inet = inet_sk(sk); | |
514 | int j, s_j; | |
515 | int reqnum, s_reqnum; | |
516 | int err = 0; | |
517 | ||
518 | s_j = cb->args[3]; | |
519 | s_reqnum = cb->args[4]; | |
520 | ||
521 | if (s_j > 0) | |
522 | s_j--; | |
523 | ||
524 | entry.family = sk->sk_family; | |
525 | ||
463c84b9 | 526 | read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 | 527 | |
463c84b9 | 528 | lopt = icsk->icsk_accept_queue.listen_opt; |
1da177e4 LT |
529 | if (!lopt || !lopt->qlen) |
530 | goto out; | |
531 | ||
532 | if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) { | |
533 | bc = (struct rtattr *)(r + 1); | |
534 | entry.sport = inet->num; | |
535 | entry.userlocks = sk->sk_userlocks; | |
536 | } | |
537 | ||
540722ff | 538 | for (j = s_j; j < lopt->nr_table_entries; j++) { |
60236fdd | 539 | struct request_sock *req, *head = lopt->syn_table[j]; |
1da177e4 LT |
540 | |
541 | reqnum = 0; | |
542 | for (req = head; req; reqnum++, req = req->dl_next) { | |
2e6599cb ACM |
543 | struct inet_request_sock *ireq = inet_rsk(req); |
544 | ||
1da177e4 LT |
545 | if (reqnum < s_reqnum) |
546 | continue; | |
73c1f4a0 ACM |
547 | if (r->id.idiag_dport != ireq->rmt_port && |
548 | r->id.idiag_dport) | |
1da177e4 LT |
549 | continue; |
550 | ||
551 | if (bc) { | |
552 | entry.saddr = | |
505cbfc5 | 553 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
1da177e4 | 554 | (entry.family == AF_INET6) ? |
2e6599cb | 555 | tcp6_rsk(req)->loc_addr.s6_addr32 : |
1da177e4 | 556 | #endif |
2e6599cb | 557 | &ireq->loc_addr; |
1da177e4 | 558 | entry.daddr = |
505cbfc5 | 559 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
1da177e4 | 560 | (entry.family == AF_INET6) ? |
2e6599cb | 561 | tcp6_rsk(req)->rmt_addr.s6_addr32 : |
1da177e4 | 562 | #endif |
2e6599cb ACM |
563 | &ireq->rmt_addr; |
564 | entry.dport = ntohs(ireq->rmt_port); | |
1da177e4 | 565 | |
73c1f4a0 | 566 | if (!inet_diag_bc_run(RTA_DATA(bc), |
1da177e4 LT |
567 | RTA_PAYLOAD(bc), &entry)) |
568 | continue; | |
569 | } | |
570 | ||
73c1f4a0 | 571 | err = inet_diag_fill_req(skb, sk, req, |
1da177e4 | 572 | NETLINK_CB(cb->skb).pid, |
540722ff | 573 | cb->nlh->nlmsg_seq, cb->nlh); |
1da177e4 LT |
574 | if (err < 0) { |
575 | cb->args[3] = j + 1; | |
576 | cb->args[4] = reqnum; | |
577 | goto out; | |
578 | } | |
579 | } | |
580 | ||
581 | s_reqnum = 0; | |
582 | } | |
583 | ||
584 | out: | |
463c84b9 | 585 | read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 LT |
586 | |
587 | return err; | |
588 | } | |
589 | ||
73c1f4a0 | 590 | static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb) |
1da177e4 LT |
591 | { |
592 | int i, num; | |
593 | int s_i, s_num; | |
73c1f4a0 | 594 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); |
4f5736c4 | 595 | const struct inet_diag_handler *handler; |
540722ff | 596 | struct inet_hashinfo *hashinfo; |
1da177e4 | 597 | |
4f5736c4 ACM |
598 | handler = inet_diag_table[cb->nlh->nlmsg_type]; |
599 | BUG_ON(handler == NULL); | |
600 | hashinfo = handler->idiag_hashinfo; | |
601 | ||
1da177e4 LT |
602 | s_i = cb->args[1]; |
603 | s_num = num = cb->args[2]; | |
4f5736c4 | 604 | |
1da177e4 | 605 | if (cb->args[0] == 0) { |
73c1f4a0 | 606 | if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV))) |
1da177e4 | 607 | goto skip_listen_ht; |
540722ff ACM |
608 | |
609 | inet_listen_lock(hashinfo); | |
0f7ff927 | 610 | for (i = s_i; i < INET_LHTABLE_SIZE; i++) { |
1da177e4 LT |
611 | struct sock *sk; |
612 | struct hlist_node *node; | |
613 | ||
614 | num = 0; | |
540722ff | 615 | sk_for_each(sk, node, &hashinfo->listening_hash[i]) { |
1da177e4 LT |
616 | struct inet_sock *inet = inet_sk(sk); |
617 | ||
618 | if (num < s_num) { | |
619 | num++; | |
620 | continue; | |
621 | } | |
622 | ||
73c1f4a0 ACM |
623 | if (r->id.idiag_sport != inet->sport && |
624 | r->id.idiag_sport) | |
1da177e4 LT |
625 | goto next_listen; |
626 | ||
73c1f4a0 ACM |
627 | if (!(r->idiag_states & TCPF_LISTEN) || |
628 | r->id.idiag_dport || | |
1da177e4 LT |
629 | cb->args[3] > 0) |
630 | goto syn_recv; | |
631 | ||
73c1f4a0 | 632 | if (inet_diag_dump_sock(skb, sk, cb) < 0) { |
540722ff | 633 | inet_listen_unlock(hashinfo); |
1da177e4 LT |
634 | goto done; |
635 | } | |
636 | ||
637 | syn_recv: | |
73c1f4a0 | 638 | if (!(r->idiag_states & TCPF_SYN_RECV)) |
1da177e4 LT |
639 | goto next_listen; |
640 | ||
73c1f4a0 | 641 | if (inet_diag_dump_reqs(skb, sk, cb) < 0) { |
540722ff | 642 | inet_listen_unlock(hashinfo); |
1da177e4 LT |
643 | goto done; |
644 | } | |
645 | ||
646 | next_listen: | |
647 | cb->args[3] = 0; | |
648 | cb->args[4] = 0; | |
649 | ++num; | |
650 | } | |
651 | ||
652 | s_num = 0; | |
653 | cb->args[3] = 0; | |
654 | cb->args[4] = 0; | |
655 | } | |
540722ff | 656 | inet_listen_unlock(hashinfo); |
1da177e4 LT |
657 | skip_listen_ht: |
658 | cb->args[0] = 1; | |
659 | s_i = num = s_num = 0; | |
660 | } | |
661 | ||
73c1f4a0 | 662 | if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV))) |
1da177e4 LT |
663 | return skb->len; |
664 | ||
540722ff ACM |
665 | for (i = s_i; i < hashinfo->ehash_size; i++) { |
666 | struct inet_ehash_bucket *head = &hashinfo->ehash[i]; | |
1da177e4 LT |
667 | struct sock *sk; |
668 | struct hlist_node *node; | |
669 | ||
670 | if (i > s_i) | |
671 | s_num = 0; | |
672 | ||
673 | read_lock_bh(&head->lock); | |
674 | ||
675 | num = 0; | |
676 | sk_for_each(sk, node, &head->chain) { | |
677 | struct inet_sock *inet = inet_sk(sk); | |
678 | ||
679 | if (num < s_num) | |
680 | goto next_normal; | |
73c1f4a0 | 681 | if (!(r->idiag_states & (1 << sk->sk_state))) |
1da177e4 | 682 | goto next_normal; |
73c1f4a0 ACM |
683 | if (r->id.idiag_sport != inet->sport && |
684 | r->id.idiag_sport) | |
1da177e4 | 685 | goto next_normal; |
73c1f4a0 | 686 | if (r->id.idiag_dport != inet->dport && r->id.idiag_dport) |
1da177e4 | 687 | goto next_normal; |
73c1f4a0 | 688 | if (inet_diag_dump_sock(skb, sk, cb) < 0) { |
1da177e4 LT |
689 | read_unlock_bh(&head->lock); |
690 | goto done; | |
691 | } | |
692 | next_normal: | |
693 | ++num; | |
694 | } | |
695 | ||
73c1f4a0 | 696 | if (r->idiag_states & TCPF_TIME_WAIT) { |
1da177e4 | 697 | sk_for_each(sk, node, |
540722ff | 698 | &hashinfo->ehash[i + hashinfo->ehash_size].chain) { |
1da177e4 LT |
699 | struct inet_sock *inet = inet_sk(sk); |
700 | ||
701 | if (num < s_num) | |
702 | goto next_dying; | |
73c1f4a0 ACM |
703 | if (r->id.idiag_sport != inet->sport && |
704 | r->id.idiag_sport) | |
1da177e4 | 705 | goto next_dying; |
73c1f4a0 ACM |
706 | if (r->id.idiag_dport != inet->dport && |
707 | r->id.idiag_dport) | |
1da177e4 | 708 | goto next_dying; |
73c1f4a0 | 709 | if (inet_diag_dump_sock(skb, sk, cb) < 0) { |
1da177e4 LT |
710 | read_unlock_bh(&head->lock); |
711 | goto done; | |
712 | } | |
713 | next_dying: | |
714 | ++num; | |
715 | } | |
716 | } | |
717 | read_unlock_bh(&head->lock); | |
718 | } | |
719 | ||
720 | done: | |
721 | cb->args[1] = i; | |
722 | cb->args[2] = num; | |
723 | return skb->len; | |
724 | } | |
725 | ||
73c1f4a0 | 726 | static int inet_diag_dump_done(struct netlink_callback *cb) |
1da177e4 LT |
727 | { |
728 | return 0; | |
729 | } | |
730 | ||
731 | ||
732 | static __inline__ int | |
73c1f4a0 | 733 | inet_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 LT |
734 | { |
735 | if (!(nlh->nlmsg_flags&NLM_F_REQUEST)) | |
736 | return 0; | |
737 | ||
4f5736c4 | 738 | if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX) |
1da177e4 LT |
739 | goto err_inval; |
740 | ||
4f5736c4 ACM |
741 | if (inet_diag_table[nlh->nlmsg_type] == NULL) |
742 | return -ENOENT; | |
743 | ||
73c1f4a0 | 744 | if (NLMSG_LENGTH(sizeof(struct inet_diag_req)) > skb->len) |
1da177e4 LT |
745 | goto err_inval; |
746 | ||
747 | if (nlh->nlmsg_flags&NLM_F_DUMP) { | |
73c1f4a0 ACM |
748 | if (nlh->nlmsg_len > |
749 | (4 + NLMSG_SPACE(sizeof(struct inet_diag_req)))) { | |
750 | struct rtattr *rta = (void *)(NLMSG_DATA(nlh) + | |
751 | sizeof(struct inet_diag_req)); | |
752 | if (rta->rta_type != INET_DIAG_REQ_BYTECODE || | |
1da177e4 | 753 | rta->rta_len < 8 || |
73c1f4a0 ACM |
754 | rta->rta_len > |
755 | (nlh->nlmsg_len - | |
756 | NLMSG_SPACE(sizeof(struct inet_diag_req)))) | |
1da177e4 | 757 | goto err_inval; |
73c1f4a0 | 758 | if (inet_diag_bc_audit(RTA_DATA(rta), RTA_PAYLOAD(rta))) |
1da177e4 LT |
759 | goto err_inval; |
760 | } | |
73c1f4a0 ACM |
761 | return netlink_dump_start(idiagnl, skb, nlh, |
762 | inet_diag_dump, | |
763 | inet_diag_dump_done); | |
1da177e4 | 764 | } else { |
73c1f4a0 | 765 | return inet_diag_get_exact(skb, nlh); |
1da177e4 LT |
766 | } |
767 | ||
768 | err_inval: | |
769 | return -EINVAL; | |
770 | } | |
771 | ||
772 | ||
73c1f4a0 | 773 | static inline void inet_diag_rcv_skb(struct sk_buff *skb) |
1da177e4 LT |
774 | { |
775 | int err; | |
776 | struct nlmsghdr * nlh; | |
777 | ||
778 | if (skb->len >= NLMSG_SPACE(0)) { | |
779 | nlh = (struct nlmsghdr *)skb->data; | |
780 | if (nlh->nlmsg_len < sizeof(*nlh) || skb->len < nlh->nlmsg_len) | |
781 | return; | |
73c1f4a0 | 782 | err = inet_diag_rcv_msg(skb, nlh); |
1da177e4 LT |
783 | if (err || nlh->nlmsg_flags & NLM_F_ACK) |
784 | netlink_ack(skb, nlh, err); | |
785 | } | |
786 | } | |
787 | ||
73c1f4a0 | 788 | static void inet_diag_rcv(struct sock *sk, int len) |
1da177e4 LT |
789 | { |
790 | struct sk_buff *skb; | |
2a0a6ebe | 791 | unsigned int qlen = skb_queue_len(&sk->sk_receive_queue); |
1da177e4 | 792 | |
2a0a6ebe | 793 | while (qlen-- && (skb = skb_dequeue(&sk->sk_receive_queue))) { |
73c1f4a0 | 794 | inet_diag_rcv_skb(skb); |
1da177e4 LT |
795 | kfree_skb(skb); |
796 | } | |
797 | } | |
798 | ||
73c1f4a0 | 799 | static void tcp_diag_get_info(struct sock *sk, struct inet_diag_msg *r, |
4f5736c4 ACM |
800 | void *_info) |
801 | { | |
802 | const struct tcp_sock *tp = tcp_sk(sk); | |
803 | struct tcp_info *info = _info; | |
804 | ||
73c1f4a0 ACM |
805 | r->idiag_rqueue = tp->rcv_nxt - tp->copied_seq; |
806 | r->idiag_wqueue = tp->write_seq - tp->snd_una; | |
4f5736c4 ACM |
807 | if (info != NULL) |
808 | tcp_get_info(sk, info); | |
809 | } | |
810 | ||
811 | static struct inet_diag_handler tcp_diag_handler = { | |
812 | .idiag_hashinfo = &tcp_hashinfo, | |
813 | .idiag_get_info = tcp_diag_get_info, | |
814 | .idiag_type = TCPDIAG_GETSOCK, | |
815 | .idiag_info_size = sizeof(struct tcp_info), | |
816 | }; | |
817 | ||
818 | static DEFINE_SPINLOCK(inet_diag_register_lock); | |
819 | ||
820 | int inet_diag_register(const struct inet_diag_handler *h) | |
821 | { | |
822 | const __u16 type = h->idiag_type; | |
823 | int err = -EINVAL; | |
824 | ||
825 | if (type >= INET_DIAG_GETSOCK_MAX) | |
826 | goto out; | |
827 | ||
828 | spin_lock(&inet_diag_register_lock); | |
829 | err = -EEXIST; | |
830 | if (inet_diag_table[type] == NULL) { | |
831 | inet_diag_table[type] = h; | |
832 | err = 0; | |
833 | } | |
834 | spin_unlock(&inet_diag_register_lock); | |
835 | out: | |
836 | return err; | |
837 | } | |
838 | EXPORT_SYMBOL_GPL(inet_diag_register); | |
839 | ||
840 | void inet_diag_unregister(const struct inet_diag_handler *h) | |
841 | { | |
842 | const __u16 type = h->idiag_type; | |
843 | ||
844 | if (type >= INET_DIAG_GETSOCK_MAX) | |
845 | return; | |
846 | ||
847 | spin_lock(&inet_diag_register_lock); | |
848 | inet_diag_table[type] = NULL; | |
849 | spin_unlock(&inet_diag_register_lock); | |
850 | ||
851 | synchronize_rcu(); | |
852 | } | |
853 | EXPORT_SYMBOL_GPL(inet_diag_unregister); | |
854 | ||
73c1f4a0 | 855 | static int __init inet_diag_init(void) |
1da177e4 | 856 | { |
4f5736c4 ACM |
857 | const int inet_diag_table_size = (INET_DIAG_GETSOCK_MAX * |
858 | sizeof(struct inet_diag_handler *)); | |
859 | int err = -ENOMEM; | |
860 | ||
861 | inet_diag_table = kmalloc(inet_diag_table_size, GFP_KERNEL); | |
862 | if (!inet_diag_table) | |
863 | goto out; | |
864 | ||
865 | memset(inet_diag_table, 0, inet_diag_table_size); | |
866 | ||
73c1f4a0 ACM |
867 | idiagnl = netlink_kernel_create(NETLINK_INET_DIAG, inet_diag_rcv, |
868 | THIS_MODULE); | |
869 | if (idiagnl == NULL) | |
4f5736c4 ACM |
870 | goto out_free_table; |
871 | ||
872 | err = inet_diag_register(&tcp_diag_handler); | |
873 | if (err) | |
874 | goto out_sock_release; | |
875 | out: | |
876 | return err; | |
877 | out_sock_release: | |
73c1f4a0 | 878 | sock_release(idiagnl->sk_socket); |
4f5736c4 ACM |
879 | out_free_table: |
880 | kfree(inet_diag_table); | |
881 | goto out; | |
1da177e4 LT |
882 | } |
883 | ||
73c1f4a0 | 884 | static void __exit inet_diag_exit(void) |
1da177e4 | 885 | { |
73c1f4a0 | 886 | sock_release(idiagnl->sk_socket); |
4f5736c4 | 887 | kfree(inet_diag_table); |
1da177e4 LT |
888 | } |
889 | ||
73c1f4a0 ACM |
890 | module_init(inet_diag_init); |
891 | module_exit(inet_diag_exit); | |
1da177e4 | 892 | MODULE_LICENSE("GPL"); |