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 | ||
a8c2190e | 35 | #include <linux/inet_diag.h> |
1da177e4 | 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 | ||
a8c2190e | 143 | #define EXPIRES_IN_MS(tmo) ((tmo - jiffies) * 1000 + HZ - 1) / HZ |
1da177e4 | 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 | 313 | case INET_DIAG_BC_S_COND: |
a8c2190e ACM |
314 | case INET_DIAG_BC_D_COND: { |
315 | struct inet_diag_hostcond *cond; | |
1da177e4 LT |
316 | u32 *addr; |
317 | ||
a8c2190e | 318 | cond = (struct inet_diag_hostcond *)(op + 1); |
1da177e4 | 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) && | |
a8c2190e ACM |
340 | bitstring_match(addr + 3, cond->addr, |
341 | cond->prefix_len)) | |
1da177e4 LT |
342 | break; |
343 | } | |
344 | yes = 0; | |
345 | break; | |
346 | } | |
347 | } | |
348 | ||
349 | if (yes) { | |
350 | len -= op->yes; | |
351 | bc += op->yes; | |
352 | } else { | |
353 | len -= op->no; | |
354 | bc += op->no; | |
355 | } | |
356 | } | |
357 | return (len == 0); | |
358 | } | |
359 | ||
360 | static int valid_cc(const void *bc, int len, int cc) | |
361 | { | |
362 | while (len >= 0) { | |
73c1f4a0 | 363 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
364 | |
365 | if (cc > len) | |
366 | return 0; | |
367 | if (cc == len) | |
368 | return 1; | |
369 | if (op->yes < 4) | |
370 | return 0; | |
371 | len -= op->yes; | |
372 | bc += op->yes; | |
373 | } | |
374 | return 0; | |
375 | } | |
376 | ||
73c1f4a0 | 377 | static int inet_diag_bc_audit(const void *bytecode, int bytecode_len) |
1da177e4 LT |
378 | { |
379 | const unsigned char *bc = bytecode; | |
380 | int len = bytecode_len; | |
381 | ||
382 | while (len > 0) { | |
a8c2190e | 383 | struct inet_diag_bc_op *op = (struct inet_diag_bc_op *)bc; |
1da177e4 LT |
384 | |
385 | //printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len); | |
386 | switch (op->code) { | |
73c1f4a0 ACM |
387 | case INET_DIAG_BC_AUTO: |
388 | case INET_DIAG_BC_S_COND: | |
389 | case INET_DIAG_BC_D_COND: | |
390 | case INET_DIAG_BC_S_GE: | |
391 | case INET_DIAG_BC_S_LE: | |
392 | case INET_DIAG_BC_D_GE: | |
393 | case INET_DIAG_BC_D_LE: | |
a8c2190e | 394 | if (op->yes < 4 || op->yes > len + 4) |
1da177e4 | 395 | return -EINVAL; |
73c1f4a0 | 396 | case INET_DIAG_BC_JMP: |
a8c2190e | 397 | if (op->no < 4 || op->no > len + 4) |
1da177e4 LT |
398 | return -EINVAL; |
399 | if (op->no < len && | |
a8c2190e | 400 | !valid_cc(bytecode, bytecode_len, len - op->no)) |
1da177e4 LT |
401 | return -EINVAL; |
402 | break; | |
73c1f4a0 | 403 | case INET_DIAG_BC_NOP: |
a8c2190e | 404 | if (op->yes < 4 || op->yes > len + 4) |
1da177e4 LT |
405 | return -EINVAL; |
406 | break; | |
407 | default: | |
408 | return -EINVAL; | |
409 | } | |
410 | bc += op->yes; | |
411 | len -= op->yes; | |
412 | } | |
413 | return len == 0 ? 0 : -EINVAL; | |
414 | } | |
415 | ||
73c1f4a0 | 416 | static int inet_diag_dump_sock(struct sk_buff *skb, struct sock *sk, |
1da177e4 LT |
417 | struct netlink_callback *cb) |
418 | { | |
73c1f4a0 | 419 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); |
1da177e4 LT |
420 | |
421 | if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) { | |
73c1f4a0 | 422 | struct inet_diag_entry entry; |
1da177e4 LT |
423 | struct rtattr *bc = (struct rtattr *)(r + 1); |
424 | struct inet_sock *inet = inet_sk(sk); | |
425 | ||
426 | entry.family = sk->sk_family; | |
505cbfc5 | 427 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
1da177e4 LT |
428 | if (entry.family == AF_INET6) { |
429 | struct ipv6_pinfo *np = inet6_sk(sk); | |
430 | ||
431 | entry.saddr = np->rcv_saddr.s6_addr32; | |
432 | entry.daddr = np->daddr.s6_addr32; | |
433 | } else | |
434 | #endif | |
435 | { | |
436 | entry.saddr = &inet->rcv_saddr; | |
437 | entry.daddr = &inet->daddr; | |
438 | } | |
439 | entry.sport = inet->num; | |
440 | entry.dport = ntohs(inet->dport); | |
441 | entry.userlocks = sk->sk_userlocks; | |
442 | ||
73c1f4a0 | 443 | if (!inet_diag_bc_run(RTA_DATA(bc), RTA_PAYLOAD(bc), &entry)) |
1da177e4 LT |
444 | return 0; |
445 | } | |
446 | ||
73c1f4a0 | 447 | return inet_diag_fill(skb, sk, r->idiag_ext, NETLINK_CB(cb->skb).pid, |
540722ff | 448 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); |
1da177e4 LT |
449 | } |
450 | ||
73c1f4a0 | 451 | static int inet_diag_fill_req(struct sk_buff *skb, struct sock *sk, |
60236fdd | 452 | struct request_sock *req, |
540722ff ACM |
453 | u32 pid, u32 seq, |
454 | const struct nlmsghdr *unlh) | |
1da177e4 | 455 | { |
2e6599cb | 456 | const struct inet_request_sock *ireq = inet_rsk(req); |
1da177e4 LT |
457 | struct inet_sock *inet = inet_sk(sk); |
458 | unsigned char *b = skb->tail; | |
73c1f4a0 | 459 | struct inet_diag_msg *r; |
1da177e4 LT |
460 | struct nlmsghdr *nlh; |
461 | long tmo; | |
462 | ||
540722ff | 463 | nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r)); |
1da177e4 LT |
464 | nlh->nlmsg_flags = NLM_F_MULTI; |
465 | r = NLMSG_DATA(nlh); | |
466 | ||
73c1f4a0 ACM |
467 | r->idiag_family = sk->sk_family; |
468 | r->idiag_state = TCP_SYN_RECV; | |
469 | r->idiag_timer = 1; | |
470 | r->idiag_retrans = req->retrans; | |
1da177e4 | 471 | |
73c1f4a0 ACM |
472 | r->id.idiag_if = sk->sk_bound_dev_if; |
473 | r->id.idiag_cookie[0] = (u32)(unsigned long)req; | |
474 | r->id.idiag_cookie[1] = (u32)(((unsigned long)req >> 31) >> 1); | |
1da177e4 LT |
475 | |
476 | tmo = req->expires - jiffies; | |
477 | if (tmo < 0) | |
478 | tmo = 0; | |
479 | ||
73c1f4a0 ACM |
480 | r->id.idiag_sport = inet->sport; |
481 | r->id.idiag_dport = ireq->rmt_port; | |
482 | r->id.idiag_src[0] = ireq->loc_addr; | |
483 | r->id.idiag_dst[0] = ireq->rmt_addr; | |
484 | r->idiag_expires = jiffies_to_msecs(tmo); | |
485 | r->idiag_rqueue = 0; | |
486 | r->idiag_wqueue = 0; | |
487 | r->idiag_uid = sock_i_uid(sk); | |
488 | r->idiag_inode = 0; | |
505cbfc5 | 489 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
73c1f4a0 ACM |
490 | if (r->idiag_family == AF_INET6) { |
491 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_src, | |
2e6599cb | 492 | &tcp6_rsk(req)->loc_addr); |
73c1f4a0 | 493 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst, |
2e6599cb | 494 | &tcp6_rsk(req)->rmt_addr); |
1da177e4 LT |
495 | } |
496 | #endif | |
497 | nlh->nlmsg_len = skb->tail - b; | |
498 | ||
499 | return skb->len; | |
500 | ||
501 | nlmsg_failure: | |
502 | skb_trim(skb, b - skb->data); | |
503 | return -1; | |
504 | } | |
505 | ||
73c1f4a0 | 506 | static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk, |
1da177e4 LT |
507 | struct netlink_callback *cb) |
508 | { | |
73c1f4a0 ACM |
509 | struct inet_diag_entry entry; |
510 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); | |
463c84b9 | 511 | struct inet_connection_sock *icsk = inet_csk(sk); |
2ad69c55 | 512 | struct listen_sock *lopt; |
1da177e4 LT |
513 | struct rtattr *bc = NULL; |
514 | struct inet_sock *inet = inet_sk(sk); | |
515 | int j, s_j; | |
516 | int reqnum, s_reqnum; | |
517 | int err = 0; | |
518 | ||
519 | s_j = cb->args[3]; | |
520 | s_reqnum = cb->args[4]; | |
521 | ||
522 | if (s_j > 0) | |
523 | s_j--; | |
524 | ||
525 | entry.family = sk->sk_family; | |
526 | ||
463c84b9 | 527 | read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 | 528 | |
463c84b9 | 529 | lopt = icsk->icsk_accept_queue.listen_opt; |
1da177e4 LT |
530 | if (!lopt || !lopt->qlen) |
531 | goto out; | |
532 | ||
533 | if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) { | |
534 | bc = (struct rtattr *)(r + 1); | |
535 | entry.sport = inet->num; | |
536 | entry.userlocks = sk->sk_userlocks; | |
537 | } | |
538 | ||
540722ff | 539 | for (j = s_j; j < lopt->nr_table_entries; j++) { |
60236fdd | 540 | struct request_sock *req, *head = lopt->syn_table[j]; |
1da177e4 LT |
541 | |
542 | reqnum = 0; | |
543 | for (req = head; req; reqnum++, req = req->dl_next) { | |
2e6599cb ACM |
544 | struct inet_request_sock *ireq = inet_rsk(req); |
545 | ||
1da177e4 LT |
546 | if (reqnum < s_reqnum) |
547 | continue; | |
73c1f4a0 ACM |
548 | if (r->id.idiag_dport != ireq->rmt_port && |
549 | r->id.idiag_dport) | |
1da177e4 LT |
550 | continue; |
551 | ||
552 | if (bc) { | |
553 | entry.saddr = | |
505cbfc5 | 554 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
1da177e4 | 555 | (entry.family == AF_INET6) ? |
2e6599cb | 556 | tcp6_rsk(req)->loc_addr.s6_addr32 : |
1da177e4 | 557 | #endif |
2e6599cb | 558 | &ireq->loc_addr; |
1da177e4 | 559 | entry.daddr = |
505cbfc5 | 560 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
1da177e4 | 561 | (entry.family == AF_INET6) ? |
2e6599cb | 562 | tcp6_rsk(req)->rmt_addr.s6_addr32 : |
1da177e4 | 563 | #endif |
2e6599cb ACM |
564 | &ireq->rmt_addr; |
565 | entry.dport = ntohs(ireq->rmt_port); | |
1da177e4 | 566 | |
73c1f4a0 | 567 | if (!inet_diag_bc_run(RTA_DATA(bc), |
1da177e4 LT |
568 | RTA_PAYLOAD(bc), &entry)) |
569 | continue; | |
570 | } | |
571 | ||
73c1f4a0 | 572 | err = inet_diag_fill_req(skb, sk, req, |
1da177e4 | 573 | NETLINK_CB(cb->skb).pid, |
540722ff | 574 | cb->nlh->nlmsg_seq, cb->nlh); |
1da177e4 LT |
575 | if (err < 0) { |
576 | cb->args[3] = j + 1; | |
577 | cb->args[4] = reqnum; | |
578 | goto out; | |
579 | } | |
580 | } | |
581 | ||
582 | s_reqnum = 0; | |
583 | } | |
584 | ||
585 | out: | |
463c84b9 | 586 | read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 LT |
587 | |
588 | return err; | |
589 | } | |
590 | ||
73c1f4a0 | 591 | static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb) |
1da177e4 LT |
592 | { |
593 | int i, num; | |
594 | int s_i, s_num; | |
73c1f4a0 | 595 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); |
4f5736c4 | 596 | const struct inet_diag_handler *handler; |
540722ff | 597 | struct inet_hashinfo *hashinfo; |
1da177e4 | 598 | |
4f5736c4 ACM |
599 | handler = inet_diag_table[cb->nlh->nlmsg_type]; |
600 | BUG_ON(handler == NULL); | |
601 | hashinfo = handler->idiag_hashinfo; | |
602 | ||
1da177e4 LT |
603 | s_i = cb->args[1]; |
604 | s_num = num = cb->args[2]; | |
4f5736c4 | 605 | |
1da177e4 | 606 | if (cb->args[0] == 0) { |
73c1f4a0 | 607 | if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV))) |
1da177e4 | 608 | goto skip_listen_ht; |
540722ff ACM |
609 | |
610 | inet_listen_lock(hashinfo); | |
0f7ff927 | 611 | for (i = s_i; i < INET_LHTABLE_SIZE; i++) { |
1da177e4 LT |
612 | struct sock *sk; |
613 | struct hlist_node *node; | |
614 | ||
615 | num = 0; | |
540722ff | 616 | sk_for_each(sk, node, &hashinfo->listening_hash[i]) { |
1da177e4 LT |
617 | struct inet_sock *inet = inet_sk(sk); |
618 | ||
619 | if (num < s_num) { | |
620 | num++; | |
621 | continue; | |
622 | } | |
623 | ||
73c1f4a0 ACM |
624 | if (r->id.idiag_sport != inet->sport && |
625 | r->id.idiag_sport) | |
1da177e4 LT |
626 | goto next_listen; |
627 | ||
73c1f4a0 ACM |
628 | if (!(r->idiag_states & TCPF_LISTEN) || |
629 | r->id.idiag_dport || | |
1da177e4 LT |
630 | cb->args[3] > 0) |
631 | goto syn_recv; | |
632 | ||
73c1f4a0 | 633 | if (inet_diag_dump_sock(skb, sk, cb) < 0) { |
540722ff | 634 | inet_listen_unlock(hashinfo); |
1da177e4 LT |
635 | goto done; |
636 | } | |
637 | ||
638 | syn_recv: | |
73c1f4a0 | 639 | if (!(r->idiag_states & TCPF_SYN_RECV)) |
1da177e4 LT |
640 | goto next_listen; |
641 | ||
73c1f4a0 | 642 | if (inet_diag_dump_reqs(skb, sk, cb) < 0) { |
540722ff | 643 | inet_listen_unlock(hashinfo); |
1da177e4 LT |
644 | goto done; |
645 | } | |
646 | ||
647 | next_listen: | |
648 | cb->args[3] = 0; | |
649 | cb->args[4] = 0; | |
650 | ++num; | |
651 | } | |
652 | ||
653 | s_num = 0; | |
654 | cb->args[3] = 0; | |
655 | cb->args[4] = 0; | |
656 | } | |
540722ff | 657 | inet_listen_unlock(hashinfo); |
1da177e4 LT |
658 | skip_listen_ht: |
659 | cb->args[0] = 1; | |
660 | s_i = num = s_num = 0; | |
661 | } | |
662 | ||
73c1f4a0 | 663 | if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV))) |
1da177e4 LT |
664 | return skb->len; |
665 | ||
540722ff ACM |
666 | for (i = s_i; i < hashinfo->ehash_size; i++) { |
667 | struct inet_ehash_bucket *head = &hashinfo->ehash[i]; | |
1da177e4 LT |
668 | struct sock *sk; |
669 | struct hlist_node *node; | |
670 | ||
671 | if (i > s_i) | |
672 | s_num = 0; | |
673 | ||
674 | read_lock_bh(&head->lock); | |
675 | ||
676 | num = 0; | |
677 | sk_for_each(sk, node, &head->chain) { | |
678 | struct inet_sock *inet = inet_sk(sk); | |
679 | ||
680 | if (num < s_num) | |
681 | goto next_normal; | |
73c1f4a0 | 682 | if (!(r->idiag_states & (1 << sk->sk_state))) |
1da177e4 | 683 | goto next_normal; |
73c1f4a0 ACM |
684 | if (r->id.idiag_sport != inet->sport && |
685 | r->id.idiag_sport) | |
1da177e4 | 686 | goto next_normal; |
73c1f4a0 | 687 | if (r->id.idiag_dport != inet->dport && r->id.idiag_dport) |
1da177e4 | 688 | goto next_normal; |
73c1f4a0 | 689 | if (inet_diag_dump_sock(skb, sk, cb) < 0) { |
1da177e4 LT |
690 | read_unlock_bh(&head->lock); |
691 | goto done; | |
692 | } | |
693 | next_normal: | |
694 | ++num; | |
695 | } | |
696 | ||
73c1f4a0 | 697 | if (r->idiag_states & TCPF_TIME_WAIT) { |
1da177e4 | 698 | sk_for_each(sk, node, |
540722ff | 699 | &hashinfo->ehash[i + hashinfo->ehash_size].chain) { |
1da177e4 LT |
700 | struct inet_sock *inet = inet_sk(sk); |
701 | ||
702 | if (num < s_num) | |
703 | goto next_dying; | |
73c1f4a0 ACM |
704 | if (r->id.idiag_sport != inet->sport && |
705 | r->id.idiag_sport) | |
1da177e4 | 706 | goto next_dying; |
73c1f4a0 ACM |
707 | if (r->id.idiag_dport != inet->dport && |
708 | r->id.idiag_dport) | |
1da177e4 | 709 | goto next_dying; |
73c1f4a0 | 710 | if (inet_diag_dump_sock(skb, sk, cb) < 0) { |
1da177e4 LT |
711 | read_unlock_bh(&head->lock); |
712 | goto done; | |
713 | } | |
714 | next_dying: | |
715 | ++num; | |
716 | } | |
717 | } | |
718 | read_unlock_bh(&head->lock); | |
719 | } | |
720 | ||
721 | done: | |
722 | cb->args[1] = i; | |
723 | cb->args[2] = num; | |
724 | return skb->len; | |
725 | } | |
726 | ||
73c1f4a0 | 727 | static int inet_diag_dump_done(struct netlink_callback *cb) |
1da177e4 LT |
728 | { |
729 | return 0; | |
730 | } | |
731 | ||
732 | ||
733 | static __inline__ int | |
73c1f4a0 | 734 | inet_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 LT |
735 | { |
736 | if (!(nlh->nlmsg_flags&NLM_F_REQUEST)) | |
737 | return 0; | |
738 | ||
4f5736c4 | 739 | if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX) |
1da177e4 LT |
740 | goto err_inval; |
741 | ||
4f5736c4 ACM |
742 | if (inet_diag_table[nlh->nlmsg_type] == NULL) |
743 | return -ENOENT; | |
744 | ||
73c1f4a0 | 745 | if (NLMSG_LENGTH(sizeof(struct inet_diag_req)) > skb->len) |
1da177e4 LT |
746 | goto err_inval; |
747 | ||
748 | if (nlh->nlmsg_flags&NLM_F_DUMP) { | |
73c1f4a0 ACM |
749 | if (nlh->nlmsg_len > |
750 | (4 + NLMSG_SPACE(sizeof(struct inet_diag_req)))) { | |
751 | struct rtattr *rta = (void *)(NLMSG_DATA(nlh) + | |
752 | sizeof(struct inet_diag_req)); | |
753 | if (rta->rta_type != INET_DIAG_REQ_BYTECODE || | |
1da177e4 | 754 | rta->rta_len < 8 || |
73c1f4a0 ACM |
755 | rta->rta_len > |
756 | (nlh->nlmsg_len - | |
757 | NLMSG_SPACE(sizeof(struct inet_diag_req)))) | |
1da177e4 | 758 | goto err_inval; |
73c1f4a0 | 759 | if (inet_diag_bc_audit(RTA_DATA(rta), RTA_PAYLOAD(rta))) |
1da177e4 LT |
760 | goto err_inval; |
761 | } | |
73c1f4a0 ACM |
762 | return netlink_dump_start(idiagnl, skb, nlh, |
763 | inet_diag_dump, | |
764 | inet_diag_dump_done); | |
1da177e4 | 765 | } else { |
73c1f4a0 | 766 | return inet_diag_get_exact(skb, nlh); |
1da177e4 LT |
767 | } |
768 | ||
769 | err_inval: | |
770 | return -EINVAL; | |
771 | } | |
772 | ||
773 | ||
73c1f4a0 | 774 | static inline void inet_diag_rcv_skb(struct sk_buff *skb) |
1da177e4 LT |
775 | { |
776 | int err; | |
777 | struct nlmsghdr * nlh; | |
778 | ||
779 | if (skb->len >= NLMSG_SPACE(0)) { | |
780 | nlh = (struct nlmsghdr *)skb->data; | |
781 | if (nlh->nlmsg_len < sizeof(*nlh) || skb->len < nlh->nlmsg_len) | |
782 | return; | |
73c1f4a0 | 783 | err = inet_diag_rcv_msg(skb, nlh); |
1da177e4 LT |
784 | if (err || nlh->nlmsg_flags & NLM_F_ACK) |
785 | netlink_ack(skb, nlh, err); | |
786 | } | |
787 | } | |
788 | ||
73c1f4a0 | 789 | static void inet_diag_rcv(struct sock *sk, int len) |
1da177e4 LT |
790 | { |
791 | struct sk_buff *skb; | |
2a0a6ebe | 792 | unsigned int qlen = skb_queue_len(&sk->sk_receive_queue); |
1da177e4 | 793 | |
2a0a6ebe | 794 | while (qlen-- && (skb = skb_dequeue(&sk->sk_receive_queue))) { |
73c1f4a0 | 795 | inet_diag_rcv_skb(skb); |
1da177e4 LT |
796 | kfree_skb(skb); |
797 | } | |
798 | } | |
799 | ||
4f5736c4 ACM |
800 | static DEFINE_SPINLOCK(inet_diag_register_lock); |
801 | ||
802 | int inet_diag_register(const struct inet_diag_handler *h) | |
803 | { | |
804 | const __u16 type = h->idiag_type; | |
805 | int err = -EINVAL; | |
806 | ||
807 | if (type >= INET_DIAG_GETSOCK_MAX) | |
808 | goto out; | |
809 | ||
810 | spin_lock(&inet_diag_register_lock); | |
811 | err = -EEXIST; | |
812 | if (inet_diag_table[type] == NULL) { | |
813 | inet_diag_table[type] = h; | |
814 | err = 0; | |
815 | } | |
816 | spin_unlock(&inet_diag_register_lock); | |
817 | out: | |
818 | return err; | |
819 | } | |
820 | EXPORT_SYMBOL_GPL(inet_diag_register); | |
821 | ||
822 | void inet_diag_unregister(const struct inet_diag_handler *h) | |
823 | { | |
824 | const __u16 type = h->idiag_type; | |
825 | ||
826 | if (type >= INET_DIAG_GETSOCK_MAX) | |
827 | return; | |
828 | ||
829 | spin_lock(&inet_diag_register_lock); | |
830 | inet_diag_table[type] = NULL; | |
831 | spin_unlock(&inet_diag_register_lock); | |
832 | ||
833 | synchronize_rcu(); | |
834 | } | |
835 | EXPORT_SYMBOL_GPL(inet_diag_unregister); | |
836 | ||
73c1f4a0 | 837 | static int __init inet_diag_init(void) |
1da177e4 | 838 | { |
4f5736c4 ACM |
839 | const int inet_diag_table_size = (INET_DIAG_GETSOCK_MAX * |
840 | sizeof(struct inet_diag_handler *)); | |
841 | int err = -ENOMEM; | |
842 | ||
843 | inet_diag_table = kmalloc(inet_diag_table_size, GFP_KERNEL); | |
844 | if (!inet_diag_table) | |
845 | goto out; | |
846 | ||
847 | memset(inet_diag_table, 0, inet_diag_table_size); | |
06628607 | 848 | idiagnl = netlink_kernel_create(NETLINK_INET_DIAG, 0, inet_diag_rcv, |
73c1f4a0 ACM |
849 | THIS_MODULE); |
850 | if (idiagnl == NULL) | |
4f5736c4 | 851 | goto out_free_table; |
17b085ea | 852 | err = 0; |
4f5736c4 ACM |
853 | out: |
854 | return err; | |
4f5736c4 ACM |
855 | out_free_table: |
856 | kfree(inet_diag_table); | |
857 | goto out; | |
1da177e4 LT |
858 | } |
859 | ||
73c1f4a0 | 860 | static void __exit inet_diag_exit(void) |
1da177e4 | 861 | { |
73c1f4a0 | 862 | sock_release(idiagnl->sk_socket); |
4f5736c4 | 863 | kfree(inet_diag_table); |
1da177e4 LT |
864 | } |
865 | ||
73c1f4a0 ACM |
866 | module_init(inet_diag_init); |
867 | module_exit(inet_diag_exit); | |
1da177e4 | 868 | MODULE_LICENSE("GPL"); |