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, |
4e852c02 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 | 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); | |
156 | return -1; | |
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); | |
212 | return -1; | |
213 | } | |
214 | ||
4e852c02 ACM |
215 | static int inet_diag_get_exact(struct sk_buff *in_skb, |
216 | const struct nlmsghdr *nlh) | |
1da177e4 LT |
217 | { |
218 | int err; | |
219 | struct sock *sk; | |
73c1f4a0 | 220 | struct inet_diag_req *req = NLMSG_DATA(nlh); |
1da177e4 | 221 | struct sk_buff *rep; |
4f5736c4 ACM |
222 | struct inet_hashinfo *hashinfo; |
223 | const struct inet_diag_handler *handler; | |
224 | ||
225 | handler = inet_diag_table[nlh->nlmsg_type]; | |
226 | BUG_ON(handler == NULL); | |
227 | hashinfo = handler->idiag_hashinfo; | |
228 | ||
73c1f4a0 ACM |
229 | if (req->idiag_family == AF_INET) { |
230 | sk = inet_lookup(hashinfo, req->id.idiag_dst[0], | |
231 | req->id.idiag_dport, req->id.idiag_src[0], | |
232 | req->id.idiag_sport, req->id.idiag_if); | |
1da177e4 | 233 | } |
505cbfc5 | 234 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
73c1f4a0 | 235 | else if (req->idiag_family == AF_INET6) { |
505cbfc5 | 236 | sk = inet6_lookup(hashinfo, |
73c1f4a0 ACM |
237 | (struct in6_addr *)req->id.idiag_dst, |
238 | req->id.idiag_dport, | |
239 | (struct in6_addr *)req->id.idiag_src, | |
240 | req->id.idiag_sport, | |
241 | req->id.idiag_if); | |
1da177e4 LT |
242 | } |
243 | #endif | |
244 | else { | |
245 | return -EINVAL; | |
246 | } | |
247 | ||
248 | if (sk == NULL) | |
249 | return -ENOENT; | |
250 | ||
251 | err = -ESTALE; | |
73c1f4a0 ACM |
252 | if ((req->id.idiag_cookie[0] != INET_DIAG_NOCOOKIE || |
253 | req->id.idiag_cookie[1] != INET_DIAG_NOCOOKIE) && | |
254 | ((u32)(unsigned long)sk != req->id.idiag_cookie[0] || | |
255 | (u32)((((unsigned long)sk) >> 31) >> 1) != req->id.idiag_cookie[1])) | |
1da177e4 LT |
256 | goto out; |
257 | ||
258 | err = -ENOMEM; | |
73c1f4a0 ACM |
259 | rep = alloc_skb(NLMSG_SPACE((sizeof(struct inet_diag_msg) + |
260 | sizeof(struct inet_diag_meminfo) + | |
4f5736c4 ACM |
261 | handler->idiag_info_size + 64)), |
262 | GFP_KERNEL); | |
1da177e4 LT |
263 | if (!rep) |
264 | goto out; | |
265 | ||
73c1f4a0 | 266 | if (inet_diag_fill(rep, sk, req->idiag_ext, |
1da177e4 | 267 | NETLINK_CB(in_skb).pid, |
540722ff | 268 | nlh->nlmsg_seq, 0, nlh) <= 0) |
1da177e4 LT |
269 | BUG(); |
270 | ||
73c1f4a0 ACM |
271 | err = netlink_unicast(idiagnl, rep, NETLINK_CB(in_skb).pid, |
272 | MSG_DONTWAIT); | |
1da177e4 LT |
273 | if (err > 0) |
274 | err = 0; | |
275 | ||
276 | out: | |
277 | if (sk) { | |
278 | if (sk->sk_state == TCP_TIME_WAIT) | |
8feaf0c0 | 279 | inet_twsk_put((struct inet_timewait_sock *)sk); |
1da177e4 LT |
280 | else |
281 | sock_put(sk); | |
282 | } | |
283 | return err; | |
284 | } | |
285 | ||
286 | static int bitstring_match(const u32 *a1, const u32 *a2, int bits) | |
287 | { | |
288 | int words = bits >> 5; | |
289 | ||
290 | bits &= 0x1f; | |
291 | ||
292 | if (words) { | |
293 | if (memcmp(a1, a2, words << 2)) | |
294 | return 0; | |
295 | } | |
296 | if (bits) { | |
297 | __u32 w1, w2; | |
298 | __u32 mask; | |
299 | ||
300 | w1 = a1[words]; | |
301 | w2 = a2[words]; | |
302 | ||
303 | mask = htonl((0xffffffff) << (32 - bits)); | |
304 | ||
305 | if ((w1 ^ w2) & mask) | |
306 | return 0; | |
307 | } | |
308 | ||
309 | return 1; | |
310 | } | |
311 | ||
312 | ||
73c1f4a0 | 313 | static int inet_diag_bc_run(const void *bc, int len, |
4e852c02 | 314 | const struct inet_diag_entry *entry) |
1da177e4 LT |
315 | { |
316 | while (len > 0) { | |
317 | int yes = 1; | |
73c1f4a0 | 318 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
319 | |
320 | switch (op->code) { | |
73c1f4a0 | 321 | case INET_DIAG_BC_NOP: |
1da177e4 | 322 | break; |
73c1f4a0 | 323 | case INET_DIAG_BC_JMP: |
1da177e4 LT |
324 | yes = 0; |
325 | break; | |
73c1f4a0 | 326 | case INET_DIAG_BC_S_GE: |
1da177e4 LT |
327 | yes = entry->sport >= op[1].no; |
328 | break; | |
73c1f4a0 | 329 | case INET_DIAG_BC_S_LE: |
1da177e4 LT |
330 | yes = entry->dport <= op[1].no; |
331 | break; | |
73c1f4a0 | 332 | case INET_DIAG_BC_D_GE: |
1da177e4 LT |
333 | yes = entry->dport >= op[1].no; |
334 | break; | |
73c1f4a0 | 335 | case INET_DIAG_BC_D_LE: |
1da177e4 LT |
336 | yes = entry->dport <= op[1].no; |
337 | break; | |
73c1f4a0 | 338 | case INET_DIAG_BC_AUTO: |
1da177e4 LT |
339 | yes = !(entry->userlocks & SOCK_BINDPORT_LOCK); |
340 | break; | |
73c1f4a0 | 341 | case INET_DIAG_BC_S_COND: |
a8c2190e ACM |
342 | case INET_DIAG_BC_D_COND: { |
343 | struct inet_diag_hostcond *cond; | |
1da177e4 LT |
344 | u32 *addr; |
345 | ||
a8c2190e | 346 | cond = (struct inet_diag_hostcond *)(op + 1); |
1da177e4 | 347 | if (cond->port != -1 && |
73c1f4a0 | 348 | cond->port != (op->code == INET_DIAG_BC_S_COND ? |
1da177e4 LT |
349 | entry->sport : entry->dport)) { |
350 | yes = 0; | |
351 | break; | |
352 | } | |
4e852c02 | 353 | |
1da177e4 LT |
354 | if (cond->prefix_len == 0) |
355 | break; | |
356 | ||
73c1f4a0 | 357 | if (op->code == INET_DIAG_BC_S_COND) |
1da177e4 LT |
358 | addr = entry->saddr; |
359 | else | |
360 | addr = entry->daddr; | |
361 | ||
4e852c02 ACM |
362 | if (bitstring_match(addr, cond->addr, |
363 | cond->prefix_len)) | |
1da177e4 LT |
364 | break; |
365 | if (entry->family == AF_INET6 && | |
366 | cond->family == AF_INET) { | |
367 | if (addr[0] == 0 && addr[1] == 0 && | |
368 | addr[2] == htonl(0xffff) && | |
a8c2190e ACM |
369 | bitstring_match(addr + 3, cond->addr, |
370 | cond->prefix_len)) | |
1da177e4 LT |
371 | break; |
372 | } | |
373 | yes = 0; | |
374 | break; | |
375 | } | |
376 | } | |
377 | ||
4e852c02 | 378 | if (yes) { |
1da177e4 LT |
379 | len -= op->yes; |
380 | bc += op->yes; | |
381 | } else { | |
382 | len -= op->no; | |
383 | bc += op->no; | |
384 | } | |
385 | } | |
386 | return (len == 0); | |
387 | } | |
388 | ||
389 | static int valid_cc(const void *bc, int len, int cc) | |
390 | { | |
391 | while (len >= 0) { | |
73c1f4a0 | 392 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
393 | |
394 | if (cc > len) | |
395 | return 0; | |
396 | if (cc == len) | |
397 | return 1; | |
398 | if (op->yes < 4) | |
399 | return 0; | |
400 | len -= op->yes; | |
401 | bc += op->yes; | |
402 | } | |
403 | return 0; | |
404 | } | |
405 | ||
73c1f4a0 | 406 | static int inet_diag_bc_audit(const void *bytecode, int bytecode_len) |
1da177e4 LT |
407 | { |
408 | const unsigned char *bc = bytecode; | |
409 | int len = bytecode_len; | |
410 | ||
411 | while (len > 0) { | |
a8c2190e | 412 | struct inet_diag_bc_op *op = (struct inet_diag_bc_op *)bc; |
1da177e4 LT |
413 | |
414 | //printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len); | |
415 | switch (op->code) { | |
73c1f4a0 ACM |
416 | case INET_DIAG_BC_AUTO: |
417 | case INET_DIAG_BC_S_COND: | |
418 | case INET_DIAG_BC_D_COND: | |
419 | case INET_DIAG_BC_S_GE: | |
420 | case INET_DIAG_BC_S_LE: | |
421 | case INET_DIAG_BC_D_GE: | |
422 | case INET_DIAG_BC_D_LE: | |
a8c2190e | 423 | if (op->yes < 4 || op->yes > len + 4) |
1da177e4 | 424 | return -EINVAL; |
73c1f4a0 | 425 | case INET_DIAG_BC_JMP: |
a8c2190e | 426 | if (op->no < 4 || op->no > len + 4) |
1da177e4 LT |
427 | return -EINVAL; |
428 | if (op->no < len && | |
a8c2190e | 429 | !valid_cc(bytecode, bytecode_len, len - op->no)) |
1da177e4 LT |
430 | return -EINVAL; |
431 | break; | |
73c1f4a0 | 432 | case INET_DIAG_BC_NOP: |
a8c2190e | 433 | if (op->yes < 4 || op->yes > len + 4) |
1da177e4 LT |
434 | return -EINVAL; |
435 | break; | |
436 | default: | |
437 | return -EINVAL; | |
438 | } | |
4e852c02 | 439 | bc += op->yes; |
1da177e4 LT |
440 | len -= op->yes; |
441 | } | |
442 | return len == 0 ? 0 : -EINVAL; | |
443 | } | |
444 | ||
73c1f4a0 | 445 | static int inet_diag_dump_sock(struct sk_buff *skb, struct sock *sk, |
4e852c02 | 446 | struct netlink_callback *cb) |
1da177e4 | 447 | { |
73c1f4a0 | 448 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); |
1da177e4 LT |
449 | |
450 | if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) { | |
73c1f4a0 | 451 | struct inet_diag_entry entry; |
1da177e4 LT |
452 | struct rtattr *bc = (struct rtattr *)(r + 1); |
453 | struct inet_sock *inet = inet_sk(sk); | |
454 | ||
455 | entry.family = sk->sk_family; | |
505cbfc5 | 456 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
1da177e4 LT |
457 | if (entry.family == AF_INET6) { |
458 | struct ipv6_pinfo *np = inet6_sk(sk); | |
459 | ||
460 | entry.saddr = np->rcv_saddr.s6_addr32; | |
461 | entry.daddr = np->daddr.s6_addr32; | |
462 | } else | |
463 | #endif | |
464 | { | |
465 | entry.saddr = &inet->rcv_saddr; | |
466 | entry.daddr = &inet->daddr; | |
467 | } | |
468 | entry.sport = inet->num; | |
469 | entry.dport = ntohs(inet->dport); | |
470 | entry.userlocks = sk->sk_userlocks; | |
471 | ||
73c1f4a0 | 472 | if (!inet_diag_bc_run(RTA_DATA(bc), RTA_PAYLOAD(bc), &entry)) |
1da177e4 LT |
473 | return 0; |
474 | } | |
475 | ||
73c1f4a0 | 476 | return inet_diag_fill(skb, sk, r->idiag_ext, NETLINK_CB(cb->skb).pid, |
4e852c02 | 477 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); |
1da177e4 LT |
478 | } |
479 | ||
c7d58aab ACM |
480 | static int inet_twsk_diag_dump(struct inet_timewait_sock *tw, |
481 | struct sk_buff *skb, | |
482 | struct netlink_callback *cb) | |
483 | { | |
484 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); | |
485 | ||
486 | if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) { | |
487 | struct inet_diag_entry entry; | |
488 | struct rtattr *bc = (struct rtattr *)(r + 1); | |
489 | ||
490 | entry.family = tw->tw_family; | |
491 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) | |
492 | if (tw->tw_family == AF_INET6) { | |
493 | struct inet6_timewait_sock *tw6 = | |
494 | inet6_twsk((struct sock *)tw); | |
495 | entry.saddr = tw6->tw_v6_rcv_saddr.s6_addr32; | |
496 | entry.daddr = tw6->tw_v6_daddr.s6_addr32; | |
497 | } else | |
498 | #endif | |
499 | { | |
500 | entry.saddr = &tw->tw_rcv_saddr; | |
501 | entry.daddr = &tw->tw_daddr; | |
502 | } | |
503 | entry.sport = tw->tw_num; | |
504 | entry.dport = ntohs(tw->tw_dport); | |
505 | entry.userlocks = 0; | |
506 | ||
507 | if (!inet_diag_bc_run(RTA_DATA(bc), RTA_PAYLOAD(bc), &entry)) | |
508 | return 0; | |
509 | } | |
510 | ||
511 | return inet_twsk_diag_fill(tw, skb, r->idiag_ext, | |
512 | NETLINK_CB(cb->skb).pid, | |
513 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); | |
514 | } | |
515 | ||
73c1f4a0 | 516 | static int inet_diag_fill_req(struct sk_buff *skb, struct sock *sk, |
4e852c02 ACM |
517 | struct request_sock *req, u32 pid, u32 seq, |
518 | const struct nlmsghdr *unlh) | |
1da177e4 | 519 | { |
2e6599cb | 520 | const struct inet_request_sock *ireq = inet_rsk(req); |
1da177e4 LT |
521 | struct inet_sock *inet = inet_sk(sk); |
522 | unsigned char *b = skb->tail; | |
73c1f4a0 | 523 | struct inet_diag_msg *r; |
1da177e4 LT |
524 | struct nlmsghdr *nlh; |
525 | long tmo; | |
526 | ||
540722ff | 527 | nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r)); |
1da177e4 LT |
528 | nlh->nlmsg_flags = NLM_F_MULTI; |
529 | r = NLMSG_DATA(nlh); | |
530 | ||
73c1f4a0 ACM |
531 | r->idiag_family = sk->sk_family; |
532 | r->idiag_state = TCP_SYN_RECV; | |
533 | r->idiag_timer = 1; | |
534 | r->idiag_retrans = req->retrans; | |
1da177e4 | 535 | |
73c1f4a0 ACM |
536 | r->id.idiag_if = sk->sk_bound_dev_if; |
537 | r->id.idiag_cookie[0] = (u32)(unsigned long)req; | |
538 | r->id.idiag_cookie[1] = (u32)(((unsigned long)req >> 31) >> 1); | |
1da177e4 LT |
539 | |
540 | tmo = req->expires - jiffies; | |
541 | if (tmo < 0) | |
542 | tmo = 0; | |
543 | ||
73c1f4a0 ACM |
544 | r->id.idiag_sport = inet->sport; |
545 | r->id.idiag_dport = ireq->rmt_port; | |
546 | r->id.idiag_src[0] = ireq->loc_addr; | |
547 | r->id.idiag_dst[0] = ireq->rmt_addr; | |
548 | r->idiag_expires = jiffies_to_msecs(tmo); | |
549 | r->idiag_rqueue = 0; | |
550 | r->idiag_wqueue = 0; | |
551 | r->idiag_uid = sock_i_uid(sk); | |
552 | r->idiag_inode = 0; | |
505cbfc5 | 553 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
73c1f4a0 ACM |
554 | if (r->idiag_family == AF_INET6) { |
555 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_src, | |
ca304b61 | 556 | &inet6_rsk(req)->loc_addr); |
73c1f4a0 | 557 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst, |
ca304b61 | 558 | &inet6_rsk(req)->rmt_addr); |
1da177e4 LT |
559 | } |
560 | #endif | |
561 | nlh->nlmsg_len = skb->tail - b; | |
562 | ||
563 | return skb->len; | |
564 | ||
565 | nlmsg_failure: | |
566 | skb_trim(skb, b - skb->data); | |
567 | return -1; | |
568 | } | |
569 | ||
73c1f4a0 | 570 | static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk, |
4e852c02 | 571 | struct netlink_callback *cb) |
1da177e4 | 572 | { |
73c1f4a0 ACM |
573 | struct inet_diag_entry entry; |
574 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); | |
463c84b9 | 575 | struct inet_connection_sock *icsk = inet_csk(sk); |
2ad69c55 | 576 | struct listen_sock *lopt; |
1da177e4 LT |
577 | struct rtattr *bc = NULL; |
578 | struct inet_sock *inet = inet_sk(sk); | |
579 | int j, s_j; | |
580 | int reqnum, s_reqnum; | |
581 | int err = 0; | |
582 | ||
583 | s_j = cb->args[3]; | |
584 | s_reqnum = cb->args[4]; | |
585 | ||
586 | if (s_j > 0) | |
587 | s_j--; | |
588 | ||
589 | entry.family = sk->sk_family; | |
590 | ||
463c84b9 | 591 | read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 | 592 | |
463c84b9 | 593 | lopt = icsk->icsk_accept_queue.listen_opt; |
1da177e4 LT |
594 | if (!lopt || !lopt->qlen) |
595 | goto out; | |
596 | ||
597 | if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) { | |
598 | bc = (struct rtattr *)(r + 1); | |
599 | entry.sport = inet->num; | |
600 | entry.userlocks = sk->sk_userlocks; | |
601 | } | |
602 | ||
540722ff | 603 | for (j = s_j; j < lopt->nr_table_entries; j++) { |
60236fdd | 604 | struct request_sock *req, *head = lopt->syn_table[j]; |
1da177e4 LT |
605 | |
606 | reqnum = 0; | |
607 | for (req = head; req; reqnum++, req = req->dl_next) { | |
2e6599cb ACM |
608 | struct inet_request_sock *ireq = inet_rsk(req); |
609 | ||
1da177e4 LT |
610 | if (reqnum < s_reqnum) |
611 | continue; | |
73c1f4a0 ACM |
612 | if (r->id.idiag_dport != ireq->rmt_port && |
613 | r->id.idiag_dport) | |
1da177e4 LT |
614 | continue; |
615 | ||
616 | if (bc) { | |
617 | entry.saddr = | |
505cbfc5 | 618 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
1da177e4 | 619 | (entry.family == AF_INET6) ? |
ca304b61 | 620 | inet6_rsk(req)->loc_addr.s6_addr32 : |
1da177e4 | 621 | #endif |
2e6599cb | 622 | &ireq->loc_addr; |
4e852c02 | 623 | entry.daddr = |
505cbfc5 | 624 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
1da177e4 | 625 | (entry.family == AF_INET6) ? |
ca304b61 | 626 | inet6_rsk(req)->rmt_addr.s6_addr32 : |
1da177e4 | 627 | #endif |
2e6599cb ACM |
628 | &ireq->rmt_addr; |
629 | entry.dport = ntohs(ireq->rmt_port); | |
1da177e4 | 630 | |
73c1f4a0 | 631 | if (!inet_diag_bc_run(RTA_DATA(bc), |
1da177e4 LT |
632 | RTA_PAYLOAD(bc), &entry)) |
633 | continue; | |
634 | } | |
635 | ||
73c1f4a0 | 636 | err = inet_diag_fill_req(skb, sk, req, |
1da177e4 | 637 | NETLINK_CB(cb->skb).pid, |
540722ff | 638 | cb->nlh->nlmsg_seq, cb->nlh); |
1da177e4 LT |
639 | if (err < 0) { |
640 | cb->args[3] = j + 1; | |
641 | cb->args[4] = reqnum; | |
642 | goto out; | |
643 | } | |
644 | } | |
645 | ||
646 | s_reqnum = 0; | |
647 | } | |
648 | ||
649 | out: | |
463c84b9 | 650 | read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 LT |
651 | |
652 | return err; | |
653 | } | |
654 | ||
73c1f4a0 | 655 | static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb) |
1da177e4 LT |
656 | { |
657 | int i, num; | |
658 | int s_i, s_num; | |
73c1f4a0 | 659 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); |
4f5736c4 | 660 | const struct inet_diag_handler *handler; |
540722ff | 661 | struct inet_hashinfo *hashinfo; |
1da177e4 | 662 | |
4f5736c4 ACM |
663 | handler = inet_diag_table[cb->nlh->nlmsg_type]; |
664 | BUG_ON(handler == NULL); | |
665 | hashinfo = handler->idiag_hashinfo; | |
4e852c02 | 666 | |
1da177e4 LT |
667 | s_i = cb->args[1]; |
668 | s_num = num = cb->args[2]; | |
4f5736c4 | 669 | |
1da177e4 | 670 | if (cb->args[0] == 0) { |
73c1f4a0 | 671 | if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV))) |
1da177e4 | 672 | goto skip_listen_ht; |
540722ff ACM |
673 | |
674 | inet_listen_lock(hashinfo); | |
0f7ff927 | 675 | for (i = s_i; i < INET_LHTABLE_SIZE; i++) { |
1da177e4 LT |
676 | struct sock *sk; |
677 | struct hlist_node *node; | |
678 | ||
679 | num = 0; | |
540722ff | 680 | sk_for_each(sk, node, &hashinfo->listening_hash[i]) { |
1da177e4 LT |
681 | struct inet_sock *inet = inet_sk(sk); |
682 | ||
683 | if (num < s_num) { | |
684 | num++; | |
685 | continue; | |
686 | } | |
687 | ||
73c1f4a0 ACM |
688 | if (r->id.idiag_sport != inet->sport && |
689 | r->id.idiag_sport) | |
1da177e4 LT |
690 | goto next_listen; |
691 | ||
73c1f4a0 ACM |
692 | if (!(r->idiag_states & TCPF_LISTEN) || |
693 | r->id.idiag_dport || | |
1da177e4 LT |
694 | cb->args[3] > 0) |
695 | goto syn_recv; | |
696 | ||
73c1f4a0 | 697 | if (inet_diag_dump_sock(skb, sk, cb) < 0) { |
540722ff | 698 | inet_listen_unlock(hashinfo); |
1da177e4 LT |
699 | goto done; |
700 | } | |
701 | ||
702 | syn_recv: | |
73c1f4a0 | 703 | if (!(r->idiag_states & TCPF_SYN_RECV)) |
1da177e4 LT |
704 | goto next_listen; |
705 | ||
73c1f4a0 | 706 | if (inet_diag_dump_reqs(skb, sk, cb) < 0) { |
540722ff | 707 | inet_listen_unlock(hashinfo); |
1da177e4 LT |
708 | goto done; |
709 | } | |
710 | ||
711 | next_listen: | |
712 | cb->args[3] = 0; | |
713 | cb->args[4] = 0; | |
714 | ++num; | |
715 | } | |
716 | ||
717 | s_num = 0; | |
718 | cb->args[3] = 0; | |
719 | cb->args[4] = 0; | |
720 | } | |
540722ff | 721 | inet_listen_unlock(hashinfo); |
1da177e4 LT |
722 | skip_listen_ht: |
723 | cb->args[0] = 1; | |
724 | s_i = num = s_num = 0; | |
725 | } | |
726 | ||
73c1f4a0 | 727 | if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV))) |
1da177e4 LT |
728 | return skb->len; |
729 | ||
540722ff ACM |
730 | for (i = s_i; i < hashinfo->ehash_size; i++) { |
731 | struct inet_ehash_bucket *head = &hashinfo->ehash[i]; | |
1da177e4 LT |
732 | struct sock *sk; |
733 | struct hlist_node *node; | |
734 | ||
735 | if (i > s_i) | |
736 | s_num = 0; | |
737 | ||
738 | read_lock_bh(&head->lock); | |
1da177e4 LT |
739 | num = 0; |
740 | sk_for_each(sk, node, &head->chain) { | |
741 | struct inet_sock *inet = inet_sk(sk); | |
742 | ||
743 | if (num < s_num) | |
744 | goto next_normal; | |
73c1f4a0 | 745 | if (!(r->idiag_states & (1 << sk->sk_state))) |
1da177e4 | 746 | goto next_normal; |
73c1f4a0 ACM |
747 | if (r->id.idiag_sport != inet->sport && |
748 | r->id.idiag_sport) | |
1da177e4 | 749 | goto next_normal; |
4e852c02 ACM |
750 | if (r->id.idiag_dport != inet->dport && |
751 | r->id.idiag_dport) | |
1da177e4 | 752 | goto next_normal; |
73c1f4a0 | 753 | if (inet_diag_dump_sock(skb, sk, cb) < 0) { |
1da177e4 LT |
754 | read_unlock_bh(&head->lock); |
755 | goto done; | |
756 | } | |
757 | next_normal: | |
758 | ++num; | |
759 | } | |
760 | ||
73c1f4a0 | 761 | if (r->idiag_states & TCPF_TIME_WAIT) { |
c7d58aab ACM |
762 | struct inet_timewait_sock *tw; |
763 | ||
764 | inet_twsk_for_each(tw, node, | |
540722ff | 765 | &hashinfo->ehash[i + hashinfo->ehash_size].chain) { |
1da177e4 LT |
766 | |
767 | if (num < s_num) | |
768 | goto next_dying; | |
7dbf0755 | 769 | if (r->id.idiag_sport != tw->tw_sport && |
73c1f4a0 | 770 | r->id.idiag_sport) |
1da177e4 | 771 | goto next_dying; |
7dbf0755 | 772 | if (r->id.idiag_dport != tw->tw_dport && |
73c1f4a0 | 773 | r->id.idiag_dport) |
1da177e4 | 774 | goto next_dying; |
c7d58aab | 775 | if (inet_twsk_diag_dump(tw, skb, cb) < 0) { |
1da177e4 LT |
776 | read_unlock_bh(&head->lock); |
777 | goto done; | |
778 | } | |
779 | next_dying: | |
780 | ++num; | |
781 | } | |
782 | } | |
783 | read_unlock_bh(&head->lock); | |
784 | } | |
785 | ||
786 | done: | |
787 | cb->args[1] = i; | |
788 | cb->args[2] = num; | |
789 | return skb->len; | |
790 | } | |
791 | ||
4e852c02 | 792 | static inline int inet_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 LT |
793 | { |
794 | if (!(nlh->nlmsg_flags&NLM_F_REQUEST)) | |
795 | return 0; | |
796 | ||
4f5736c4 | 797 | if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX) |
1da177e4 LT |
798 | goto err_inval; |
799 | ||
4f5736c4 ACM |
800 | if (inet_diag_table[nlh->nlmsg_type] == NULL) |
801 | return -ENOENT; | |
802 | ||
73c1f4a0 | 803 | if (NLMSG_LENGTH(sizeof(struct inet_diag_req)) > skb->len) |
1da177e4 LT |
804 | goto err_inval; |
805 | ||
806 | if (nlh->nlmsg_flags&NLM_F_DUMP) { | |
73c1f4a0 ACM |
807 | if (nlh->nlmsg_len > |
808 | (4 + NLMSG_SPACE(sizeof(struct inet_diag_req)))) { | |
809 | struct rtattr *rta = (void *)(NLMSG_DATA(nlh) + | |
810 | sizeof(struct inet_diag_req)); | |
811 | if (rta->rta_type != INET_DIAG_REQ_BYTECODE || | |
1da177e4 | 812 | rta->rta_len < 8 || |
73c1f4a0 ACM |
813 | rta->rta_len > |
814 | (nlh->nlmsg_len - | |
815 | NLMSG_SPACE(sizeof(struct inet_diag_req)))) | |
1da177e4 | 816 | goto err_inval; |
73c1f4a0 | 817 | if (inet_diag_bc_audit(RTA_DATA(rta), RTA_PAYLOAD(rta))) |
1da177e4 LT |
818 | goto err_inval; |
819 | } | |
73c1f4a0 | 820 | return netlink_dump_start(idiagnl, skb, nlh, |
a8f74b22 | 821 | inet_diag_dump, NULL); |
4e852c02 | 822 | } else |
73c1f4a0 | 823 | return inet_diag_get_exact(skb, nlh); |
1da177e4 LT |
824 | |
825 | err_inval: | |
826 | return -EINVAL; | |
827 | } | |
828 | ||
829 | ||
73c1f4a0 | 830 | static inline void inet_diag_rcv_skb(struct sk_buff *skb) |
1da177e4 | 831 | { |
1da177e4 | 832 | if (skb->len >= NLMSG_SPACE(0)) { |
4e852c02 ACM |
833 | int err; |
834 | struct nlmsghdr *nlh = (struct nlmsghdr *)skb->data; | |
835 | ||
836 | if (nlh->nlmsg_len < sizeof(*nlh) || | |
837 | skb->len < nlh->nlmsg_len) | |
1da177e4 | 838 | return; |
73c1f4a0 | 839 | err = inet_diag_rcv_msg(skb, nlh); |
4e852c02 | 840 | if (err || nlh->nlmsg_flags & NLM_F_ACK) |
1da177e4 LT |
841 | netlink_ack(skb, nlh, err); |
842 | } | |
843 | } | |
844 | ||
73c1f4a0 | 845 | static void inet_diag_rcv(struct sock *sk, int len) |
1da177e4 LT |
846 | { |
847 | struct sk_buff *skb; | |
2a0a6ebe | 848 | unsigned int qlen = skb_queue_len(&sk->sk_receive_queue); |
1da177e4 | 849 | |
2a0a6ebe | 850 | while (qlen-- && (skb = skb_dequeue(&sk->sk_receive_queue))) { |
73c1f4a0 | 851 | inet_diag_rcv_skb(skb); |
1da177e4 LT |
852 | kfree_skb(skb); |
853 | } | |
854 | } | |
855 | ||
4f5736c4 ACM |
856 | static DEFINE_SPINLOCK(inet_diag_register_lock); |
857 | ||
858 | int inet_diag_register(const struct inet_diag_handler *h) | |
859 | { | |
860 | const __u16 type = h->idiag_type; | |
861 | int err = -EINVAL; | |
862 | ||
863 | if (type >= INET_DIAG_GETSOCK_MAX) | |
864 | goto out; | |
865 | ||
866 | spin_lock(&inet_diag_register_lock); | |
867 | err = -EEXIST; | |
868 | if (inet_diag_table[type] == NULL) { | |
869 | inet_diag_table[type] = h; | |
870 | err = 0; | |
871 | } | |
872 | spin_unlock(&inet_diag_register_lock); | |
873 | out: | |
874 | return err; | |
875 | } | |
876 | EXPORT_SYMBOL_GPL(inet_diag_register); | |
877 | ||
878 | void inet_diag_unregister(const struct inet_diag_handler *h) | |
879 | { | |
880 | const __u16 type = h->idiag_type; | |
881 | ||
882 | if (type >= INET_DIAG_GETSOCK_MAX) | |
883 | return; | |
884 | ||
885 | spin_lock(&inet_diag_register_lock); | |
886 | inet_diag_table[type] = NULL; | |
887 | spin_unlock(&inet_diag_register_lock); | |
888 | ||
889 | synchronize_rcu(); | |
890 | } | |
891 | EXPORT_SYMBOL_GPL(inet_diag_unregister); | |
892 | ||
73c1f4a0 | 893 | static int __init inet_diag_init(void) |
1da177e4 | 894 | { |
4f5736c4 ACM |
895 | const int inet_diag_table_size = (INET_DIAG_GETSOCK_MAX * |
896 | sizeof(struct inet_diag_handler *)); | |
897 | int err = -ENOMEM; | |
898 | ||
899 | inet_diag_table = kmalloc(inet_diag_table_size, GFP_KERNEL); | |
900 | if (!inet_diag_table) | |
901 | goto out; | |
902 | ||
903 | memset(inet_diag_table, 0, inet_diag_table_size); | |
06628607 | 904 | idiagnl = netlink_kernel_create(NETLINK_INET_DIAG, 0, inet_diag_rcv, |
73c1f4a0 ACM |
905 | THIS_MODULE); |
906 | if (idiagnl == NULL) | |
4f5736c4 | 907 | goto out_free_table; |
17b085ea | 908 | err = 0; |
4f5736c4 ACM |
909 | out: |
910 | return err; | |
4f5736c4 ACM |
911 | out_free_table: |
912 | kfree(inet_diag_table); | |
913 | goto out; | |
1da177e4 LT |
914 | } |
915 | ||
73c1f4a0 | 916 | static void __exit inet_diag_exit(void) |
1da177e4 | 917 | { |
73c1f4a0 | 918 | sock_release(idiagnl->sk_socket); |
4f5736c4 | 919 | kfree(inet_diag_table); |
1da177e4 LT |
920 | } |
921 | ||
73c1f4a0 ACM |
922 | module_init(inet_diag_init); |
923 | module_exit(inet_diag_exit); | |
1da177e4 | 924 | MODULE_LICENSE("GPL"); |