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 | ||
1da177e4 LT |
14 | #include <linux/module.h> |
15 | #include <linux/types.h> | |
16 | #include <linux/fcntl.h> | |
17 | #include <linux/random.h> | |
18 | #include <linux/cache.h> | |
19 | #include <linux/init.h> | |
20 | #include <linux/time.h> | |
21 | ||
22 | #include <net/icmp.h> | |
23 | #include <net/tcp.h> | |
24 | #include <net/ipv6.h> | |
25 | #include <net/inet_common.h> | |
505cbfc5 ACM |
26 | #include <net/inet_connection_sock.h> |
27 | #include <net/inet_hashtables.h> | |
28 | #include <net/inet_timewait_sock.h> | |
29 | #include <net/inet6_hashtables.h> | |
1da177e4 LT |
30 | |
31 | #include <linux/inet.h> | |
32 | #include <linux/stddef.h> | |
33 | ||
a8c2190e | 34 | #include <linux/inet_diag.h> |
1da177e4 | 35 | |
4f5736c4 ACM |
36 | static const struct inet_diag_handler **inet_diag_table; |
37 | ||
73c1f4a0 | 38 | struct inet_diag_entry { |
9f855299 AV |
39 | __be32 *saddr; |
40 | __be32 *daddr; | |
1da177e4 LT |
41 | u16 sport; |
42 | u16 dport; | |
43 | u16 family; | |
44 | u16 userlocks; | |
45 | }; | |
46 | ||
73c1f4a0 | 47 | static struct sock *idiagnl; |
1da177e4 | 48 | |
73c1f4a0 | 49 | #define INET_DIAG_PUT(skb, attrtype, attrlen) \ |
7c99c909 | 50 | RTA_DATA(__RTA_PUT(skb, attrtype, attrlen)) |
1da177e4 | 51 | |
dff2c035 ACM |
52 | static int inet_csk_diag_fill(struct sock *sk, |
53 | struct sk_buff *skb, | |
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 | 72 | r = NLMSG_DATA(nlh); |
c7d58aab ACM |
73 | BUG_ON(sk->sk_state == TCP_TIME_WAIT); |
74 | ||
75 | if (ext & (1 << (INET_DIAG_MEMINFO - 1))) | |
76 | minfo = INET_DIAG_PUT(skb, INET_DIAG_MEMINFO, sizeof(*minfo)); | |
77 | ||
78 | if (ext & (1 << (INET_DIAG_INFO - 1))) | |
79 | info = INET_DIAG_PUT(skb, INET_DIAG_INFO, | |
80 | handler->idiag_info_size); | |
81 | ||
82 | if ((ext & (1 << (INET_DIAG_CONG - 1))) && icsk->icsk_ca_ops) { | |
83 | const size_t len = strlen(icsk->icsk_ca_ops->name); | |
84 | ||
85 | strcpy(INET_DIAG_PUT(skb, INET_DIAG_CONG, len + 1), | |
86 | icsk->icsk_ca_ops->name); | |
1da177e4 | 87 | } |
c7d58aab | 88 | |
73c1f4a0 ACM |
89 | r->idiag_family = sk->sk_family; |
90 | r->idiag_state = sk->sk_state; | |
91 | r->idiag_timer = 0; | |
92 | r->idiag_retrans = 0; | |
1da177e4 | 93 | |
73c1f4a0 ACM |
94 | r->id.idiag_if = sk->sk_bound_dev_if; |
95 | r->id.idiag_cookie[0] = (u32)(unsigned long)sk; | |
96 | r->id.idiag_cookie[1] = (u32)(((unsigned long)sk >> 31) >> 1); | |
1da177e4 | 97 | |
73c1f4a0 ACM |
98 | r->id.idiag_sport = inet->sport; |
99 | r->id.idiag_dport = inet->dport; | |
100 | r->id.idiag_src[0] = inet->rcv_saddr; | |
101 | r->id.idiag_dst[0] = inet->daddr; | |
1da177e4 | 102 | |
505cbfc5 | 103 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
73c1f4a0 | 104 | if (r->idiag_family == AF_INET6) { |
1da177e4 LT |
105 | struct ipv6_pinfo *np = inet6_sk(sk); |
106 | ||
73c1f4a0 | 107 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_src, |
1da177e4 | 108 | &np->rcv_saddr); |
73c1f4a0 | 109 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst, |
1da177e4 LT |
110 | &np->daddr); |
111 | } | |
112 | #endif | |
113 | ||
a8c2190e | 114 | #define EXPIRES_IN_MS(tmo) ((tmo - jiffies) * 1000 + HZ - 1) / HZ |
1da177e4 | 115 | |
463c84b9 | 116 | if (icsk->icsk_pending == ICSK_TIME_RETRANS) { |
73c1f4a0 ACM |
117 | r->idiag_timer = 1; |
118 | r->idiag_retrans = icsk->icsk_retransmits; | |
119 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); | |
463c84b9 | 120 | } else if (icsk->icsk_pending == ICSK_TIME_PROBE0) { |
73c1f4a0 ACM |
121 | r->idiag_timer = 4; |
122 | r->idiag_retrans = icsk->icsk_probes_out; | |
123 | r->idiag_expires = EXPIRES_IN_MS(icsk->icsk_timeout); | |
1da177e4 | 124 | } else if (timer_pending(&sk->sk_timer)) { |
73c1f4a0 ACM |
125 | r->idiag_timer = 2; |
126 | r->idiag_retrans = icsk->icsk_probes_out; | |
127 | r->idiag_expires = EXPIRES_IN_MS(sk->sk_timer.expires); | |
1da177e4 | 128 | } else { |
73c1f4a0 ACM |
129 | r->idiag_timer = 0; |
130 | r->idiag_expires = 0; | |
1da177e4 LT |
131 | } |
132 | #undef EXPIRES_IN_MS | |
540722ff | 133 | |
73c1f4a0 ACM |
134 | r->idiag_uid = sock_i_uid(sk); |
135 | r->idiag_inode = sock_i_ino(sk); | |
1da177e4 LT |
136 | |
137 | if (minfo) { | |
73c1f4a0 ACM |
138 | minfo->idiag_rmem = atomic_read(&sk->sk_rmem_alloc); |
139 | minfo->idiag_wmem = sk->sk_wmem_queued; | |
140 | minfo->idiag_fmem = sk->sk_forward_alloc; | |
141 | minfo->idiag_tmem = atomic_read(&sk->sk_wmem_alloc); | |
1da177e4 LT |
142 | } |
143 | ||
4f5736c4 | 144 | handler->idiag_get_info(sk, r, info); |
1da177e4 | 145 | |
6687e988 ACM |
146 | if (sk->sk_state < TCP_TIME_WAIT && |
147 | icsk->icsk_ca_ops && icsk->icsk_ca_ops->get_info) | |
148 | icsk->icsk_ca_ops->get_info(sk, ext, skb); | |
1da177e4 LT |
149 | |
150 | nlh->nlmsg_len = skb->tail - b; | |
151 | return skb->len; | |
152 | ||
7c99c909 | 153 | rtattr_failure: |
1da177e4 LT |
154 | nlmsg_failure: |
155 | skb_trim(skb, b - skb->data); | |
26932566 | 156 | return -EMSGSIZE; |
1da177e4 LT |
157 | } |
158 | ||
c7d58aab ACM |
159 | static int inet_twsk_diag_fill(struct inet_timewait_sock *tw, |
160 | struct sk_buff *skb, int ext, u32 pid, | |
161 | u32 seq, u16 nlmsg_flags, | |
162 | const struct nlmsghdr *unlh) | |
163 | { | |
164 | long tmo; | |
165 | struct inet_diag_msg *r; | |
166 | const unsigned char *previous_tail = skb->tail; | |
167 | struct nlmsghdr *nlh = NLMSG_PUT(skb, pid, seq, | |
168 | unlh->nlmsg_type, sizeof(*r)); | |
169 | ||
170 | r = NLMSG_DATA(nlh); | |
171 | BUG_ON(tw->tw_state != TCP_TIME_WAIT); | |
172 | ||
173 | nlh->nlmsg_flags = nlmsg_flags; | |
174 | ||
175 | tmo = tw->tw_ttd - jiffies; | |
176 | if (tmo < 0) | |
177 | tmo = 0; | |
178 | ||
179 | r->idiag_family = tw->tw_family; | |
180 | r->idiag_state = tw->tw_state; | |
181 | r->idiag_timer = 0; | |
182 | r->idiag_retrans = 0; | |
183 | r->id.idiag_if = tw->tw_bound_dev_if; | |
184 | r->id.idiag_cookie[0] = (u32)(unsigned long)tw; | |
185 | r->id.idiag_cookie[1] = (u32)(((unsigned long)tw >> 31) >> 1); | |
186 | r->id.idiag_sport = tw->tw_sport; | |
187 | r->id.idiag_dport = tw->tw_dport; | |
188 | r->id.idiag_src[0] = tw->tw_rcv_saddr; | |
189 | r->id.idiag_dst[0] = tw->tw_daddr; | |
190 | r->idiag_state = tw->tw_substate; | |
191 | r->idiag_timer = 3; | |
192 | r->idiag_expires = (tmo * 1000 + HZ - 1) / HZ; | |
193 | r->idiag_rqueue = 0; | |
194 | r->idiag_wqueue = 0; | |
195 | r->idiag_uid = 0; | |
196 | r->idiag_inode = 0; | |
197 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) | |
198 | if (tw->tw_family == AF_INET6) { | |
199 | const struct inet6_timewait_sock *tw6 = | |
200 | inet6_twsk((struct sock *)tw); | |
201 | ||
202 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_src, | |
203 | &tw6->tw_v6_rcv_saddr); | |
204 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst, | |
205 | &tw6->tw_v6_daddr); | |
206 | } | |
207 | #endif | |
208 | nlh->nlmsg_len = skb->tail - previous_tail; | |
209 | return skb->len; | |
210 | nlmsg_failure: | |
211 | skb_trim(skb, previous_tail - skb->data); | |
26932566 | 212 | return -EMSGSIZE; |
c7d58aab ACM |
213 | } |
214 | ||
dff2c035 ACM |
215 | static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, |
216 | int ext, u32 pid, u32 seq, u16 nlmsg_flags, | |
217 | const struct nlmsghdr *unlh) | |
218 | { | |
219 | if (sk->sk_state == TCP_TIME_WAIT) | |
220 | return inet_twsk_diag_fill((struct inet_timewait_sock *)sk, | |
221 | skb, ext, pid, seq, nlmsg_flags, | |
222 | unlh); | |
223 | return inet_csk_diag_fill(sk, skb, ext, pid, seq, nlmsg_flags, unlh); | |
224 | } | |
225 | ||
4e852c02 ACM |
226 | static int inet_diag_get_exact(struct sk_buff *in_skb, |
227 | const struct nlmsghdr *nlh) | |
1da177e4 LT |
228 | { |
229 | int err; | |
230 | struct sock *sk; | |
73c1f4a0 | 231 | struct inet_diag_req *req = NLMSG_DATA(nlh); |
1da177e4 | 232 | struct sk_buff *rep; |
4f5736c4 ACM |
233 | struct inet_hashinfo *hashinfo; |
234 | const struct inet_diag_handler *handler; | |
235 | ||
236 | handler = inet_diag_table[nlh->nlmsg_type]; | |
237 | BUG_ON(handler == NULL); | |
238 | hashinfo = handler->idiag_hashinfo; | |
239 | ||
73c1f4a0 ACM |
240 | if (req->idiag_family == AF_INET) { |
241 | sk = inet_lookup(hashinfo, req->id.idiag_dst[0], | |
242 | req->id.idiag_dport, req->id.idiag_src[0], | |
243 | req->id.idiag_sport, req->id.idiag_if); | |
1da177e4 | 244 | } |
505cbfc5 | 245 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
73c1f4a0 | 246 | else if (req->idiag_family == AF_INET6) { |
505cbfc5 | 247 | sk = inet6_lookup(hashinfo, |
73c1f4a0 ACM |
248 | (struct in6_addr *)req->id.idiag_dst, |
249 | req->id.idiag_dport, | |
250 | (struct in6_addr *)req->id.idiag_src, | |
251 | req->id.idiag_sport, | |
252 | req->id.idiag_if); | |
1da177e4 LT |
253 | } |
254 | #endif | |
255 | else { | |
256 | return -EINVAL; | |
257 | } | |
258 | ||
259 | if (sk == NULL) | |
260 | return -ENOENT; | |
261 | ||
262 | err = -ESTALE; | |
73c1f4a0 ACM |
263 | if ((req->id.idiag_cookie[0] != INET_DIAG_NOCOOKIE || |
264 | req->id.idiag_cookie[1] != INET_DIAG_NOCOOKIE) && | |
265 | ((u32)(unsigned long)sk != req->id.idiag_cookie[0] || | |
266 | (u32)((((unsigned long)sk) >> 31) >> 1) != req->id.idiag_cookie[1])) | |
1da177e4 LT |
267 | goto out; |
268 | ||
269 | err = -ENOMEM; | |
73c1f4a0 ACM |
270 | rep = alloc_skb(NLMSG_SPACE((sizeof(struct inet_diag_msg) + |
271 | sizeof(struct inet_diag_meminfo) + | |
4f5736c4 ACM |
272 | handler->idiag_info_size + 64)), |
273 | GFP_KERNEL); | |
1da177e4 LT |
274 | if (!rep) |
275 | goto out; | |
276 | ||
26932566 PM |
277 | err = sk_diag_fill(sk, rep, req->idiag_ext, |
278 | NETLINK_CB(in_skb).pid, | |
279 | nlh->nlmsg_seq, 0, nlh); | |
280 | if (err < 0) { | |
281 | WARN_ON(err == -EMSGSIZE); | |
282 | kfree_skb(rep); | |
283 | goto out; | |
284 | } | |
73c1f4a0 ACM |
285 | err = netlink_unicast(idiagnl, rep, NETLINK_CB(in_skb).pid, |
286 | MSG_DONTWAIT); | |
1da177e4 LT |
287 | if (err > 0) |
288 | err = 0; | |
289 | ||
290 | out: | |
291 | if (sk) { | |
292 | if (sk->sk_state == TCP_TIME_WAIT) | |
8feaf0c0 | 293 | inet_twsk_put((struct inet_timewait_sock *)sk); |
1da177e4 LT |
294 | else |
295 | sock_put(sk); | |
296 | } | |
297 | return err; | |
298 | } | |
299 | ||
9f855299 | 300 | static int bitstring_match(const __be32 *a1, const __be32 *a2, int bits) |
1da177e4 LT |
301 | { |
302 | int words = bits >> 5; | |
303 | ||
304 | bits &= 0x1f; | |
305 | ||
306 | if (words) { | |
307 | if (memcmp(a1, a2, words << 2)) | |
308 | return 0; | |
309 | } | |
310 | if (bits) { | |
9f855299 AV |
311 | __be32 w1, w2; |
312 | __be32 mask; | |
1da177e4 LT |
313 | |
314 | w1 = a1[words]; | |
315 | w2 = a2[words]; | |
316 | ||
317 | mask = htonl((0xffffffff) << (32 - bits)); | |
318 | ||
319 | if ((w1 ^ w2) & mask) | |
320 | return 0; | |
321 | } | |
322 | ||
323 | return 1; | |
324 | } | |
325 | ||
326 | ||
73c1f4a0 | 327 | static int inet_diag_bc_run(const void *bc, int len, |
4e852c02 | 328 | const struct inet_diag_entry *entry) |
1da177e4 LT |
329 | { |
330 | while (len > 0) { | |
331 | int yes = 1; | |
73c1f4a0 | 332 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
333 | |
334 | switch (op->code) { | |
73c1f4a0 | 335 | case INET_DIAG_BC_NOP: |
1da177e4 | 336 | break; |
73c1f4a0 | 337 | case INET_DIAG_BC_JMP: |
1da177e4 LT |
338 | yes = 0; |
339 | break; | |
73c1f4a0 | 340 | case INET_DIAG_BC_S_GE: |
1da177e4 LT |
341 | yes = entry->sport >= op[1].no; |
342 | break; | |
73c1f4a0 | 343 | case INET_DIAG_BC_S_LE: |
1da177e4 LT |
344 | yes = entry->dport <= op[1].no; |
345 | break; | |
73c1f4a0 | 346 | case INET_DIAG_BC_D_GE: |
1da177e4 LT |
347 | yes = entry->dport >= op[1].no; |
348 | break; | |
73c1f4a0 | 349 | case INET_DIAG_BC_D_LE: |
1da177e4 LT |
350 | yes = entry->dport <= op[1].no; |
351 | break; | |
73c1f4a0 | 352 | case INET_DIAG_BC_AUTO: |
1da177e4 LT |
353 | yes = !(entry->userlocks & SOCK_BINDPORT_LOCK); |
354 | break; | |
73c1f4a0 | 355 | case INET_DIAG_BC_S_COND: |
a8c2190e ACM |
356 | case INET_DIAG_BC_D_COND: { |
357 | struct inet_diag_hostcond *cond; | |
9f855299 | 358 | __be32 *addr; |
1da177e4 | 359 | |
a8c2190e | 360 | cond = (struct inet_diag_hostcond *)(op + 1); |
1da177e4 | 361 | if (cond->port != -1 && |
73c1f4a0 | 362 | cond->port != (op->code == INET_DIAG_BC_S_COND ? |
1da177e4 LT |
363 | entry->sport : entry->dport)) { |
364 | yes = 0; | |
365 | break; | |
366 | } | |
4e852c02 | 367 | |
1da177e4 LT |
368 | if (cond->prefix_len == 0) |
369 | break; | |
370 | ||
73c1f4a0 | 371 | if (op->code == INET_DIAG_BC_S_COND) |
1da177e4 LT |
372 | addr = entry->saddr; |
373 | else | |
374 | addr = entry->daddr; | |
375 | ||
4e852c02 ACM |
376 | if (bitstring_match(addr, cond->addr, |
377 | cond->prefix_len)) | |
1da177e4 LT |
378 | break; |
379 | if (entry->family == AF_INET6 && | |
380 | cond->family == AF_INET) { | |
381 | if (addr[0] == 0 && addr[1] == 0 && | |
382 | addr[2] == htonl(0xffff) && | |
a8c2190e ACM |
383 | bitstring_match(addr + 3, cond->addr, |
384 | cond->prefix_len)) | |
1da177e4 LT |
385 | break; |
386 | } | |
387 | yes = 0; | |
388 | break; | |
389 | } | |
390 | } | |
391 | ||
4e852c02 | 392 | if (yes) { |
1da177e4 LT |
393 | len -= op->yes; |
394 | bc += op->yes; | |
395 | } else { | |
396 | len -= op->no; | |
397 | bc += op->no; | |
398 | } | |
399 | } | |
400 | return (len == 0); | |
401 | } | |
402 | ||
403 | static int valid_cc(const void *bc, int len, int cc) | |
404 | { | |
405 | while (len >= 0) { | |
73c1f4a0 | 406 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
407 | |
408 | if (cc > len) | |
409 | return 0; | |
410 | if (cc == len) | |
411 | return 1; | |
412 | if (op->yes < 4) | |
413 | return 0; | |
414 | len -= op->yes; | |
415 | bc += op->yes; | |
416 | } | |
417 | return 0; | |
418 | } | |
419 | ||
73c1f4a0 | 420 | static int inet_diag_bc_audit(const void *bytecode, int bytecode_len) |
1da177e4 LT |
421 | { |
422 | const unsigned char *bc = bytecode; | |
423 | int len = bytecode_len; | |
424 | ||
425 | while (len > 0) { | |
a8c2190e | 426 | struct inet_diag_bc_op *op = (struct inet_diag_bc_op *)bc; |
1da177e4 LT |
427 | |
428 | //printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len); | |
429 | switch (op->code) { | |
73c1f4a0 ACM |
430 | case INET_DIAG_BC_AUTO: |
431 | case INET_DIAG_BC_S_COND: | |
432 | case INET_DIAG_BC_D_COND: | |
433 | case INET_DIAG_BC_S_GE: | |
434 | case INET_DIAG_BC_S_LE: | |
435 | case INET_DIAG_BC_D_GE: | |
436 | case INET_DIAG_BC_D_LE: | |
a8c2190e | 437 | if (op->yes < 4 || op->yes > len + 4) |
1da177e4 | 438 | return -EINVAL; |
73c1f4a0 | 439 | case INET_DIAG_BC_JMP: |
a8c2190e | 440 | if (op->no < 4 || op->no > len + 4) |
1da177e4 LT |
441 | return -EINVAL; |
442 | if (op->no < len && | |
a8c2190e | 443 | !valid_cc(bytecode, bytecode_len, len - op->no)) |
1da177e4 LT |
444 | return -EINVAL; |
445 | break; | |
73c1f4a0 | 446 | case INET_DIAG_BC_NOP: |
a8c2190e | 447 | if (op->yes < 4 || op->yes > len + 4) |
1da177e4 LT |
448 | return -EINVAL; |
449 | break; | |
450 | default: | |
451 | return -EINVAL; | |
452 | } | |
4e852c02 | 453 | bc += op->yes; |
1da177e4 LT |
454 | len -= op->yes; |
455 | } | |
456 | return len == 0 ? 0 : -EINVAL; | |
457 | } | |
458 | ||
dff2c035 ACM |
459 | static int inet_csk_diag_dump(struct sock *sk, |
460 | struct sk_buff *skb, | |
461 | struct netlink_callback *cb) | |
1da177e4 | 462 | { |
73c1f4a0 | 463 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); |
1da177e4 LT |
464 | |
465 | if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) { | |
73c1f4a0 | 466 | struct inet_diag_entry entry; |
1da177e4 LT |
467 | struct rtattr *bc = (struct rtattr *)(r + 1); |
468 | struct inet_sock *inet = inet_sk(sk); | |
469 | ||
470 | entry.family = sk->sk_family; | |
505cbfc5 | 471 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
1da177e4 LT |
472 | if (entry.family == AF_INET6) { |
473 | struct ipv6_pinfo *np = inet6_sk(sk); | |
474 | ||
475 | entry.saddr = np->rcv_saddr.s6_addr32; | |
476 | entry.daddr = np->daddr.s6_addr32; | |
477 | } else | |
478 | #endif | |
479 | { | |
480 | entry.saddr = &inet->rcv_saddr; | |
481 | entry.daddr = &inet->daddr; | |
482 | } | |
483 | entry.sport = inet->num; | |
484 | entry.dport = ntohs(inet->dport); | |
485 | entry.userlocks = sk->sk_userlocks; | |
486 | ||
73c1f4a0 | 487 | if (!inet_diag_bc_run(RTA_DATA(bc), RTA_PAYLOAD(bc), &entry)) |
1da177e4 LT |
488 | return 0; |
489 | } | |
490 | ||
dff2c035 ACM |
491 | return inet_csk_diag_fill(sk, skb, r->idiag_ext, |
492 | NETLINK_CB(cb->skb).pid, | |
493 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); | |
1da177e4 LT |
494 | } |
495 | ||
c7d58aab ACM |
496 | static int inet_twsk_diag_dump(struct inet_timewait_sock *tw, |
497 | struct sk_buff *skb, | |
498 | struct netlink_callback *cb) | |
499 | { | |
500 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); | |
501 | ||
502 | if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) { | |
503 | struct inet_diag_entry entry; | |
504 | struct rtattr *bc = (struct rtattr *)(r + 1); | |
505 | ||
506 | entry.family = tw->tw_family; | |
507 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) | |
508 | if (tw->tw_family == AF_INET6) { | |
509 | struct inet6_timewait_sock *tw6 = | |
510 | inet6_twsk((struct sock *)tw); | |
511 | entry.saddr = tw6->tw_v6_rcv_saddr.s6_addr32; | |
512 | entry.daddr = tw6->tw_v6_daddr.s6_addr32; | |
513 | } else | |
514 | #endif | |
515 | { | |
516 | entry.saddr = &tw->tw_rcv_saddr; | |
517 | entry.daddr = &tw->tw_daddr; | |
518 | } | |
519 | entry.sport = tw->tw_num; | |
520 | entry.dport = ntohs(tw->tw_dport); | |
521 | entry.userlocks = 0; | |
522 | ||
523 | if (!inet_diag_bc_run(RTA_DATA(bc), RTA_PAYLOAD(bc), &entry)) | |
524 | return 0; | |
525 | } | |
526 | ||
527 | return inet_twsk_diag_fill(tw, skb, r->idiag_ext, | |
528 | NETLINK_CB(cb->skb).pid, | |
529 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); | |
530 | } | |
531 | ||
73c1f4a0 | 532 | static int inet_diag_fill_req(struct sk_buff *skb, struct sock *sk, |
4e852c02 ACM |
533 | struct request_sock *req, u32 pid, u32 seq, |
534 | const struct nlmsghdr *unlh) | |
1da177e4 | 535 | { |
2e6599cb | 536 | const struct inet_request_sock *ireq = inet_rsk(req); |
1da177e4 LT |
537 | struct inet_sock *inet = inet_sk(sk); |
538 | unsigned char *b = skb->tail; | |
73c1f4a0 | 539 | struct inet_diag_msg *r; |
1da177e4 LT |
540 | struct nlmsghdr *nlh; |
541 | long tmo; | |
542 | ||
540722ff | 543 | nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r)); |
1da177e4 LT |
544 | nlh->nlmsg_flags = NLM_F_MULTI; |
545 | r = NLMSG_DATA(nlh); | |
546 | ||
73c1f4a0 ACM |
547 | r->idiag_family = sk->sk_family; |
548 | r->idiag_state = TCP_SYN_RECV; | |
549 | r->idiag_timer = 1; | |
550 | r->idiag_retrans = req->retrans; | |
1da177e4 | 551 | |
73c1f4a0 ACM |
552 | r->id.idiag_if = sk->sk_bound_dev_if; |
553 | r->id.idiag_cookie[0] = (u32)(unsigned long)req; | |
554 | r->id.idiag_cookie[1] = (u32)(((unsigned long)req >> 31) >> 1); | |
1da177e4 LT |
555 | |
556 | tmo = req->expires - jiffies; | |
557 | if (tmo < 0) | |
558 | tmo = 0; | |
559 | ||
73c1f4a0 ACM |
560 | r->id.idiag_sport = inet->sport; |
561 | r->id.idiag_dport = ireq->rmt_port; | |
562 | r->id.idiag_src[0] = ireq->loc_addr; | |
563 | r->id.idiag_dst[0] = ireq->rmt_addr; | |
564 | r->idiag_expires = jiffies_to_msecs(tmo); | |
565 | r->idiag_rqueue = 0; | |
566 | r->idiag_wqueue = 0; | |
567 | r->idiag_uid = sock_i_uid(sk); | |
568 | r->idiag_inode = 0; | |
505cbfc5 | 569 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
73c1f4a0 ACM |
570 | if (r->idiag_family == AF_INET6) { |
571 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_src, | |
ca304b61 | 572 | &inet6_rsk(req)->loc_addr); |
73c1f4a0 | 573 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst, |
ca304b61 | 574 | &inet6_rsk(req)->rmt_addr); |
1da177e4 LT |
575 | } |
576 | #endif | |
577 | nlh->nlmsg_len = skb->tail - b; | |
578 | ||
579 | return skb->len; | |
580 | ||
581 | nlmsg_failure: | |
582 | skb_trim(skb, b - skb->data); | |
583 | return -1; | |
584 | } | |
585 | ||
73c1f4a0 | 586 | static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk, |
4e852c02 | 587 | struct netlink_callback *cb) |
1da177e4 | 588 | { |
73c1f4a0 ACM |
589 | struct inet_diag_entry entry; |
590 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); | |
463c84b9 | 591 | struct inet_connection_sock *icsk = inet_csk(sk); |
2ad69c55 | 592 | struct listen_sock *lopt; |
1da177e4 LT |
593 | struct rtattr *bc = NULL; |
594 | struct inet_sock *inet = inet_sk(sk); | |
595 | int j, s_j; | |
596 | int reqnum, s_reqnum; | |
597 | int err = 0; | |
598 | ||
599 | s_j = cb->args[3]; | |
600 | s_reqnum = cb->args[4]; | |
601 | ||
602 | if (s_j > 0) | |
603 | s_j--; | |
604 | ||
605 | entry.family = sk->sk_family; | |
606 | ||
463c84b9 | 607 | read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 | 608 | |
463c84b9 | 609 | lopt = icsk->icsk_accept_queue.listen_opt; |
1da177e4 LT |
610 | if (!lopt || !lopt->qlen) |
611 | goto out; | |
612 | ||
613 | if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) { | |
614 | bc = (struct rtattr *)(r + 1); | |
615 | entry.sport = inet->num; | |
616 | entry.userlocks = sk->sk_userlocks; | |
617 | } | |
618 | ||
540722ff | 619 | for (j = s_j; j < lopt->nr_table_entries; j++) { |
60236fdd | 620 | struct request_sock *req, *head = lopt->syn_table[j]; |
1da177e4 LT |
621 | |
622 | reqnum = 0; | |
623 | for (req = head; req; reqnum++, req = req->dl_next) { | |
2e6599cb ACM |
624 | struct inet_request_sock *ireq = inet_rsk(req); |
625 | ||
1da177e4 LT |
626 | if (reqnum < s_reqnum) |
627 | continue; | |
73c1f4a0 ACM |
628 | if (r->id.idiag_dport != ireq->rmt_port && |
629 | r->id.idiag_dport) | |
1da177e4 LT |
630 | continue; |
631 | ||
632 | if (bc) { | |
633 | entry.saddr = | |
505cbfc5 | 634 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
1da177e4 | 635 | (entry.family == AF_INET6) ? |
ca304b61 | 636 | inet6_rsk(req)->loc_addr.s6_addr32 : |
1da177e4 | 637 | #endif |
2e6599cb | 638 | &ireq->loc_addr; |
4e852c02 | 639 | entry.daddr = |
505cbfc5 | 640 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
1da177e4 | 641 | (entry.family == AF_INET6) ? |
ca304b61 | 642 | inet6_rsk(req)->rmt_addr.s6_addr32 : |
1da177e4 | 643 | #endif |
2e6599cb ACM |
644 | &ireq->rmt_addr; |
645 | entry.dport = ntohs(ireq->rmt_port); | |
1da177e4 | 646 | |
73c1f4a0 | 647 | if (!inet_diag_bc_run(RTA_DATA(bc), |
1da177e4 LT |
648 | RTA_PAYLOAD(bc), &entry)) |
649 | continue; | |
650 | } | |
651 | ||
73c1f4a0 | 652 | err = inet_diag_fill_req(skb, sk, req, |
1da177e4 | 653 | NETLINK_CB(cb->skb).pid, |
540722ff | 654 | cb->nlh->nlmsg_seq, cb->nlh); |
1da177e4 LT |
655 | if (err < 0) { |
656 | cb->args[3] = j + 1; | |
657 | cb->args[4] = reqnum; | |
658 | goto out; | |
659 | } | |
660 | } | |
661 | ||
662 | s_reqnum = 0; | |
663 | } | |
664 | ||
665 | out: | |
463c84b9 | 666 | read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 LT |
667 | |
668 | return err; | |
669 | } | |
670 | ||
73c1f4a0 | 671 | static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb) |
1da177e4 LT |
672 | { |
673 | int i, num; | |
674 | int s_i, s_num; | |
73c1f4a0 | 675 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); |
4f5736c4 | 676 | const struct inet_diag_handler *handler; |
540722ff | 677 | struct inet_hashinfo *hashinfo; |
1da177e4 | 678 | |
4f5736c4 ACM |
679 | handler = inet_diag_table[cb->nlh->nlmsg_type]; |
680 | BUG_ON(handler == NULL); | |
681 | hashinfo = handler->idiag_hashinfo; | |
4e852c02 | 682 | |
1da177e4 LT |
683 | s_i = cb->args[1]; |
684 | s_num = num = cb->args[2]; | |
4f5736c4 | 685 | |
1da177e4 | 686 | if (cb->args[0] == 0) { |
73c1f4a0 | 687 | if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV))) |
1da177e4 | 688 | goto skip_listen_ht; |
540722ff ACM |
689 | |
690 | inet_listen_lock(hashinfo); | |
0f7ff927 | 691 | for (i = s_i; i < INET_LHTABLE_SIZE; i++) { |
1da177e4 LT |
692 | struct sock *sk; |
693 | struct hlist_node *node; | |
694 | ||
695 | num = 0; | |
540722ff | 696 | sk_for_each(sk, node, &hashinfo->listening_hash[i]) { |
1da177e4 LT |
697 | struct inet_sock *inet = inet_sk(sk); |
698 | ||
699 | if (num < s_num) { | |
700 | num++; | |
701 | continue; | |
702 | } | |
703 | ||
73c1f4a0 ACM |
704 | if (r->id.idiag_sport != inet->sport && |
705 | r->id.idiag_sport) | |
1da177e4 LT |
706 | goto next_listen; |
707 | ||
73c1f4a0 ACM |
708 | if (!(r->idiag_states & TCPF_LISTEN) || |
709 | r->id.idiag_dport || | |
1da177e4 LT |
710 | cb->args[3] > 0) |
711 | goto syn_recv; | |
712 | ||
dff2c035 | 713 | if (inet_csk_diag_dump(sk, skb, cb) < 0) { |
540722ff | 714 | inet_listen_unlock(hashinfo); |
1da177e4 LT |
715 | goto done; |
716 | } | |
717 | ||
718 | syn_recv: | |
73c1f4a0 | 719 | if (!(r->idiag_states & TCPF_SYN_RECV)) |
1da177e4 LT |
720 | goto next_listen; |
721 | ||
73c1f4a0 | 722 | if (inet_diag_dump_reqs(skb, sk, cb) < 0) { |
540722ff | 723 | inet_listen_unlock(hashinfo); |
1da177e4 LT |
724 | goto done; |
725 | } | |
726 | ||
727 | next_listen: | |
728 | cb->args[3] = 0; | |
729 | cb->args[4] = 0; | |
730 | ++num; | |
731 | } | |
732 | ||
733 | s_num = 0; | |
734 | cb->args[3] = 0; | |
735 | cb->args[4] = 0; | |
736 | } | |
540722ff | 737 | inet_listen_unlock(hashinfo); |
1da177e4 LT |
738 | skip_listen_ht: |
739 | cb->args[0] = 1; | |
740 | s_i = num = s_num = 0; | |
741 | } | |
742 | ||
73c1f4a0 | 743 | if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV))) |
1da177e4 LT |
744 | return skb->len; |
745 | ||
540722ff ACM |
746 | for (i = s_i; i < hashinfo->ehash_size; i++) { |
747 | struct inet_ehash_bucket *head = &hashinfo->ehash[i]; | |
1da177e4 LT |
748 | struct sock *sk; |
749 | struct hlist_node *node; | |
750 | ||
751 | if (i > s_i) | |
752 | s_num = 0; | |
753 | ||
754 | read_lock_bh(&head->lock); | |
1da177e4 LT |
755 | num = 0; |
756 | sk_for_each(sk, node, &head->chain) { | |
757 | struct inet_sock *inet = inet_sk(sk); | |
758 | ||
759 | if (num < s_num) | |
760 | goto next_normal; | |
73c1f4a0 | 761 | if (!(r->idiag_states & (1 << sk->sk_state))) |
1da177e4 | 762 | goto next_normal; |
73c1f4a0 ACM |
763 | if (r->id.idiag_sport != inet->sport && |
764 | r->id.idiag_sport) | |
1da177e4 | 765 | goto next_normal; |
4e852c02 ACM |
766 | if (r->id.idiag_dport != inet->dport && |
767 | r->id.idiag_dport) | |
1da177e4 | 768 | goto next_normal; |
dff2c035 | 769 | if (inet_csk_diag_dump(sk, skb, cb) < 0) { |
1da177e4 LT |
770 | read_unlock_bh(&head->lock); |
771 | goto done; | |
772 | } | |
773 | next_normal: | |
774 | ++num; | |
775 | } | |
776 | ||
73c1f4a0 | 777 | if (r->idiag_states & TCPF_TIME_WAIT) { |
c7d58aab ACM |
778 | struct inet_timewait_sock *tw; |
779 | ||
780 | inet_twsk_for_each(tw, node, | |
dbca9b27 | 781 | &head->twchain) { |
1da177e4 LT |
782 | |
783 | if (num < s_num) | |
784 | goto next_dying; | |
7dbf0755 | 785 | if (r->id.idiag_sport != tw->tw_sport && |
73c1f4a0 | 786 | r->id.idiag_sport) |
1da177e4 | 787 | goto next_dying; |
7dbf0755 | 788 | if (r->id.idiag_dport != tw->tw_dport && |
73c1f4a0 | 789 | r->id.idiag_dport) |
1da177e4 | 790 | goto next_dying; |
c7d58aab | 791 | if (inet_twsk_diag_dump(tw, skb, cb) < 0) { |
1da177e4 LT |
792 | read_unlock_bh(&head->lock); |
793 | goto done; | |
794 | } | |
795 | next_dying: | |
796 | ++num; | |
797 | } | |
798 | } | |
799 | read_unlock_bh(&head->lock); | |
800 | } | |
801 | ||
802 | done: | |
803 | cb->args[1] = i; | |
804 | cb->args[2] = num; | |
805 | return skb->len; | |
806 | } | |
807 | ||
4e852c02 | 808 | static inline int inet_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 LT |
809 | { |
810 | if (!(nlh->nlmsg_flags&NLM_F_REQUEST)) | |
811 | return 0; | |
812 | ||
4f5736c4 | 813 | if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX) |
1da177e4 LT |
814 | goto err_inval; |
815 | ||
4f5736c4 ACM |
816 | if (inet_diag_table[nlh->nlmsg_type] == NULL) |
817 | return -ENOENT; | |
818 | ||
73c1f4a0 | 819 | if (NLMSG_LENGTH(sizeof(struct inet_diag_req)) > skb->len) |
1da177e4 LT |
820 | goto err_inval; |
821 | ||
822 | if (nlh->nlmsg_flags&NLM_F_DUMP) { | |
73c1f4a0 ACM |
823 | if (nlh->nlmsg_len > |
824 | (4 + NLMSG_SPACE(sizeof(struct inet_diag_req)))) { | |
825 | struct rtattr *rta = (void *)(NLMSG_DATA(nlh) + | |
826 | sizeof(struct inet_diag_req)); | |
827 | if (rta->rta_type != INET_DIAG_REQ_BYTECODE || | |
1da177e4 | 828 | rta->rta_len < 8 || |
73c1f4a0 ACM |
829 | rta->rta_len > |
830 | (nlh->nlmsg_len - | |
831 | NLMSG_SPACE(sizeof(struct inet_diag_req)))) | |
1da177e4 | 832 | goto err_inval; |
73c1f4a0 | 833 | if (inet_diag_bc_audit(RTA_DATA(rta), RTA_PAYLOAD(rta))) |
1da177e4 LT |
834 | goto err_inval; |
835 | } | |
73c1f4a0 | 836 | return netlink_dump_start(idiagnl, skb, nlh, |
a8f74b22 | 837 | inet_diag_dump, NULL); |
4e852c02 | 838 | } else |
73c1f4a0 | 839 | return inet_diag_get_exact(skb, nlh); |
1da177e4 LT |
840 | |
841 | err_inval: | |
842 | return -EINVAL; | |
843 | } | |
844 | ||
845 | ||
73c1f4a0 | 846 | static inline void inet_diag_rcv_skb(struct sk_buff *skb) |
1da177e4 | 847 | { |
1da177e4 | 848 | if (skb->len >= NLMSG_SPACE(0)) { |
4e852c02 ACM |
849 | int err; |
850 | struct nlmsghdr *nlh = (struct nlmsghdr *)skb->data; | |
851 | ||
852 | if (nlh->nlmsg_len < sizeof(*nlh) || | |
853 | skb->len < nlh->nlmsg_len) | |
1da177e4 | 854 | return; |
73c1f4a0 | 855 | err = inet_diag_rcv_msg(skb, nlh); |
4e852c02 | 856 | if (err || nlh->nlmsg_flags & NLM_F_ACK) |
1da177e4 LT |
857 | netlink_ack(skb, nlh, err); |
858 | } | |
859 | } | |
860 | ||
73c1f4a0 | 861 | static void inet_diag_rcv(struct sock *sk, int len) |
1da177e4 LT |
862 | { |
863 | struct sk_buff *skb; | |
2a0a6ebe | 864 | unsigned int qlen = skb_queue_len(&sk->sk_receive_queue); |
1da177e4 | 865 | |
2a0a6ebe | 866 | while (qlen-- && (skb = skb_dequeue(&sk->sk_receive_queue))) { |
73c1f4a0 | 867 | inet_diag_rcv_skb(skb); |
1da177e4 LT |
868 | kfree_skb(skb); |
869 | } | |
870 | } | |
871 | ||
4f5736c4 ACM |
872 | static DEFINE_SPINLOCK(inet_diag_register_lock); |
873 | ||
874 | int inet_diag_register(const struct inet_diag_handler *h) | |
875 | { | |
876 | const __u16 type = h->idiag_type; | |
877 | int err = -EINVAL; | |
878 | ||
879 | if (type >= INET_DIAG_GETSOCK_MAX) | |
880 | goto out; | |
881 | ||
882 | spin_lock(&inet_diag_register_lock); | |
883 | err = -EEXIST; | |
884 | if (inet_diag_table[type] == NULL) { | |
885 | inet_diag_table[type] = h; | |
886 | err = 0; | |
887 | } | |
888 | spin_unlock(&inet_diag_register_lock); | |
889 | out: | |
890 | return err; | |
891 | } | |
892 | EXPORT_SYMBOL_GPL(inet_diag_register); | |
893 | ||
894 | void inet_diag_unregister(const struct inet_diag_handler *h) | |
895 | { | |
896 | const __u16 type = h->idiag_type; | |
897 | ||
898 | if (type >= INET_DIAG_GETSOCK_MAX) | |
899 | return; | |
900 | ||
901 | spin_lock(&inet_diag_register_lock); | |
902 | inet_diag_table[type] = NULL; | |
903 | spin_unlock(&inet_diag_register_lock); | |
904 | ||
905 | synchronize_rcu(); | |
906 | } | |
907 | EXPORT_SYMBOL_GPL(inet_diag_unregister); | |
908 | ||
73c1f4a0 | 909 | static int __init inet_diag_init(void) |
1da177e4 | 910 | { |
4f5736c4 ACM |
911 | const int inet_diag_table_size = (INET_DIAG_GETSOCK_MAX * |
912 | sizeof(struct inet_diag_handler *)); | |
913 | int err = -ENOMEM; | |
914 | ||
0da974f4 | 915 | inet_diag_table = kzalloc(inet_diag_table_size, GFP_KERNEL); |
4f5736c4 ACM |
916 | if (!inet_diag_table) |
917 | goto out; | |
918 | ||
06628607 | 919 | idiagnl = netlink_kernel_create(NETLINK_INET_DIAG, 0, inet_diag_rcv, |
73c1f4a0 ACM |
920 | THIS_MODULE); |
921 | if (idiagnl == NULL) | |
4f5736c4 | 922 | goto out_free_table; |
17b085ea | 923 | err = 0; |
4f5736c4 ACM |
924 | out: |
925 | return err; | |
4f5736c4 ACM |
926 | out_free_table: |
927 | kfree(inet_diag_table); | |
928 | goto out; | |
1da177e4 LT |
929 | } |
930 | ||
73c1f4a0 | 931 | static void __exit inet_diag_exit(void) |
1da177e4 | 932 | { |
73c1f4a0 | 933 | sock_release(idiagnl->sk_socket); |
4f5736c4 | 934 | kfree(inet_diag_table); |
1da177e4 LT |
935 | } |
936 | ||
73c1f4a0 ACM |
937 | module_init(inet_diag_init); |
938 | module_exit(inet_diag_exit); | |
1da177e4 | 939 | MODULE_LICENSE("GPL"); |