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Commit | Line | Data |
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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 { |
1da177e4 LT |
39 | u32 *saddr; |
40 | u32 *daddr; | |
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); | |
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 | ||
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 | ||
dff2c035 | 277 | if (sk_diag_fill(sk, rep, req->idiag_ext, |
1da177e4 | 278 | NETLINK_CB(in_skb).pid, |
540722ff | 279 | nlh->nlmsg_seq, 0, nlh) <= 0) |
1da177e4 LT |
280 | BUG(); |
281 | ||
73c1f4a0 ACM |
282 | err = netlink_unicast(idiagnl, rep, NETLINK_CB(in_skb).pid, |
283 | MSG_DONTWAIT); | |
1da177e4 LT |
284 | if (err > 0) |
285 | err = 0; | |
286 | ||
287 | out: | |
288 | if (sk) { | |
289 | if (sk->sk_state == TCP_TIME_WAIT) | |
8feaf0c0 | 290 | inet_twsk_put((struct inet_timewait_sock *)sk); |
1da177e4 LT |
291 | else |
292 | sock_put(sk); | |
293 | } | |
294 | return err; | |
295 | } | |
296 | ||
297 | static int bitstring_match(const u32 *a1, const u32 *a2, int bits) | |
298 | { | |
299 | int words = bits >> 5; | |
300 | ||
301 | bits &= 0x1f; | |
302 | ||
303 | if (words) { | |
304 | if (memcmp(a1, a2, words << 2)) | |
305 | return 0; | |
306 | } | |
307 | if (bits) { | |
308 | __u32 w1, w2; | |
309 | __u32 mask; | |
310 | ||
311 | w1 = a1[words]; | |
312 | w2 = a2[words]; | |
313 | ||
314 | mask = htonl((0xffffffff) << (32 - bits)); | |
315 | ||
316 | if ((w1 ^ w2) & mask) | |
317 | return 0; | |
318 | } | |
319 | ||
320 | return 1; | |
321 | } | |
322 | ||
323 | ||
73c1f4a0 | 324 | static int inet_diag_bc_run(const void *bc, int len, |
4e852c02 | 325 | const struct inet_diag_entry *entry) |
1da177e4 LT |
326 | { |
327 | while (len > 0) { | |
328 | int yes = 1; | |
73c1f4a0 | 329 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
330 | |
331 | switch (op->code) { | |
73c1f4a0 | 332 | case INET_DIAG_BC_NOP: |
1da177e4 | 333 | break; |
73c1f4a0 | 334 | case INET_DIAG_BC_JMP: |
1da177e4 LT |
335 | yes = 0; |
336 | break; | |
73c1f4a0 | 337 | case INET_DIAG_BC_S_GE: |
1da177e4 LT |
338 | yes = entry->sport >= op[1].no; |
339 | break; | |
73c1f4a0 | 340 | case INET_DIAG_BC_S_LE: |
1da177e4 LT |
341 | yes = entry->dport <= op[1].no; |
342 | break; | |
73c1f4a0 | 343 | case INET_DIAG_BC_D_GE: |
1da177e4 LT |
344 | yes = entry->dport >= op[1].no; |
345 | break; | |
73c1f4a0 | 346 | case INET_DIAG_BC_D_LE: |
1da177e4 LT |
347 | yes = entry->dport <= op[1].no; |
348 | break; | |
73c1f4a0 | 349 | case INET_DIAG_BC_AUTO: |
1da177e4 LT |
350 | yes = !(entry->userlocks & SOCK_BINDPORT_LOCK); |
351 | break; | |
73c1f4a0 | 352 | case INET_DIAG_BC_S_COND: |
a8c2190e ACM |
353 | case INET_DIAG_BC_D_COND: { |
354 | struct inet_diag_hostcond *cond; | |
1da177e4 LT |
355 | u32 *addr; |
356 | ||
a8c2190e | 357 | cond = (struct inet_diag_hostcond *)(op + 1); |
1da177e4 | 358 | if (cond->port != -1 && |
73c1f4a0 | 359 | cond->port != (op->code == INET_DIAG_BC_S_COND ? |
1da177e4 LT |
360 | entry->sport : entry->dport)) { |
361 | yes = 0; | |
362 | break; | |
363 | } | |
4e852c02 | 364 | |
1da177e4 LT |
365 | if (cond->prefix_len == 0) |
366 | break; | |
367 | ||
73c1f4a0 | 368 | if (op->code == INET_DIAG_BC_S_COND) |
1da177e4 LT |
369 | addr = entry->saddr; |
370 | else | |
371 | addr = entry->daddr; | |
372 | ||
4e852c02 ACM |
373 | if (bitstring_match(addr, cond->addr, |
374 | cond->prefix_len)) | |
1da177e4 LT |
375 | break; |
376 | if (entry->family == AF_INET6 && | |
377 | cond->family == AF_INET) { | |
378 | if (addr[0] == 0 && addr[1] == 0 && | |
379 | addr[2] == htonl(0xffff) && | |
a8c2190e ACM |
380 | bitstring_match(addr + 3, cond->addr, |
381 | cond->prefix_len)) | |
1da177e4 LT |
382 | break; |
383 | } | |
384 | yes = 0; | |
385 | break; | |
386 | } | |
387 | } | |
388 | ||
4e852c02 | 389 | if (yes) { |
1da177e4 LT |
390 | len -= op->yes; |
391 | bc += op->yes; | |
392 | } else { | |
393 | len -= op->no; | |
394 | bc += op->no; | |
395 | } | |
396 | } | |
397 | return (len == 0); | |
398 | } | |
399 | ||
400 | static int valid_cc(const void *bc, int len, int cc) | |
401 | { | |
402 | while (len >= 0) { | |
73c1f4a0 | 403 | const struct inet_diag_bc_op *op = bc; |
1da177e4 LT |
404 | |
405 | if (cc > len) | |
406 | return 0; | |
407 | if (cc == len) | |
408 | return 1; | |
409 | if (op->yes < 4) | |
410 | return 0; | |
411 | len -= op->yes; | |
412 | bc += op->yes; | |
413 | } | |
414 | return 0; | |
415 | } | |
416 | ||
73c1f4a0 | 417 | static int inet_diag_bc_audit(const void *bytecode, int bytecode_len) |
1da177e4 LT |
418 | { |
419 | const unsigned char *bc = bytecode; | |
420 | int len = bytecode_len; | |
421 | ||
422 | while (len > 0) { | |
a8c2190e | 423 | struct inet_diag_bc_op *op = (struct inet_diag_bc_op *)bc; |
1da177e4 LT |
424 | |
425 | //printk("BC: %d %d %d {%d} / %d\n", op->code, op->yes, op->no, op[1].no, len); | |
426 | switch (op->code) { | |
73c1f4a0 ACM |
427 | case INET_DIAG_BC_AUTO: |
428 | case INET_DIAG_BC_S_COND: | |
429 | case INET_DIAG_BC_D_COND: | |
430 | case INET_DIAG_BC_S_GE: | |
431 | case INET_DIAG_BC_S_LE: | |
432 | case INET_DIAG_BC_D_GE: | |
433 | case INET_DIAG_BC_D_LE: | |
a8c2190e | 434 | if (op->yes < 4 || op->yes > len + 4) |
1da177e4 | 435 | return -EINVAL; |
73c1f4a0 | 436 | case INET_DIAG_BC_JMP: |
a8c2190e | 437 | if (op->no < 4 || op->no > len + 4) |
1da177e4 LT |
438 | return -EINVAL; |
439 | if (op->no < len && | |
a8c2190e | 440 | !valid_cc(bytecode, bytecode_len, len - op->no)) |
1da177e4 LT |
441 | return -EINVAL; |
442 | break; | |
73c1f4a0 | 443 | case INET_DIAG_BC_NOP: |
a8c2190e | 444 | if (op->yes < 4 || op->yes > len + 4) |
1da177e4 LT |
445 | return -EINVAL; |
446 | break; | |
447 | default: | |
448 | return -EINVAL; | |
449 | } | |
4e852c02 | 450 | bc += op->yes; |
1da177e4 LT |
451 | len -= op->yes; |
452 | } | |
453 | return len == 0 ? 0 : -EINVAL; | |
454 | } | |
455 | ||
dff2c035 ACM |
456 | static int inet_csk_diag_dump(struct sock *sk, |
457 | struct sk_buff *skb, | |
458 | struct netlink_callback *cb) | |
1da177e4 | 459 | { |
73c1f4a0 | 460 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); |
1da177e4 LT |
461 | |
462 | if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) { | |
73c1f4a0 | 463 | struct inet_diag_entry entry; |
1da177e4 LT |
464 | struct rtattr *bc = (struct rtattr *)(r + 1); |
465 | struct inet_sock *inet = inet_sk(sk); | |
466 | ||
467 | entry.family = sk->sk_family; | |
505cbfc5 | 468 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
1da177e4 LT |
469 | if (entry.family == AF_INET6) { |
470 | struct ipv6_pinfo *np = inet6_sk(sk); | |
471 | ||
472 | entry.saddr = np->rcv_saddr.s6_addr32; | |
473 | entry.daddr = np->daddr.s6_addr32; | |
474 | } else | |
475 | #endif | |
476 | { | |
477 | entry.saddr = &inet->rcv_saddr; | |
478 | entry.daddr = &inet->daddr; | |
479 | } | |
480 | entry.sport = inet->num; | |
481 | entry.dport = ntohs(inet->dport); | |
482 | entry.userlocks = sk->sk_userlocks; | |
483 | ||
73c1f4a0 | 484 | if (!inet_diag_bc_run(RTA_DATA(bc), RTA_PAYLOAD(bc), &entry)) |
1da177e4 LT |
485 | return 0; |
486 | } | |
487 | ||
dff2c035 ACM |
488 | return inet_csk_diag_fill(sk, skb, r->idiag_ext, |
489 | NETLINK_CB(cb->skb).pid, | |
490 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); | |
1da177e4 LT |
491 | } |
492 | ||
c7d58aab ACM |
493 | static int inet_twsk_diag_dump(struct inet_timewait_sock *tw, |
494 | struct sk_buff *skb, | |
495 | struct netlink_callback *cb) | |
496 | { | |
497 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); | |
498 | ||
499 | if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) { | |
500 | struct inet_diag_entry entry; | |
501 | struct rtattr *bc = (struct rtattr *)(r + 1); | |
502 | ||
503 | entry.family = tw->tw_family; | |
504 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) | |
505 | if (tw->tw_family == AF_INET6) { | |
506 | struct inet6_timewait_sock *tw6 = | |
507 | inet6_twsk((struct sock *)tw); | |
508 | entry.saddr = tw6->tw_v6_rcv_saddr.s6_addr32; | |
509 | entry.daddr = tw6->tw_v6_daddr.s6_addr32; | |
510 | } else | |
511 | #endif | |
512 | { | |
513 | entry.saddr = &tw->tw_rcv_saddr; | |
514 | entry.daddr = &tw->tw_daddr; | |
515 | } | |
516 | entry.sport = tw->tw_num; | |
517 | entry.dport = ntohs(tw->tw_dport); | |
518 | entry.userlocks = 0; | |
519 | ||
520 | if (!inet_diag_bc_run(RTA_DATA(bc), RTA_PAYLOAD(bc), &entry)) | |
521 | return 0; | |
522 | } | |
523 | ||
524 | return inet_twsk_diag_fill(tw, skb, r->idiag_ext, | |
525 | NETLINK_CB(cb->skb).pid, | |
526 | cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh); | |
527 | } | |
528 | ||
73c1f4a0 | 529 | static int inet_diag_fill_req(struct sk_buff *skb, struct sock *sk, |
4e852c02 ACM |
530 | struct request_sock *req, u32 pid, u32 seq, |
531 | const struct nlmsghdr *unlh) | |
1da177e4 | 532 | { |
2e6599cb | 533 | const struct inet_request_sock *ireq = inet_rsk(req); |
1da177e4 LT |
534 | struct inet_sock *inet = inet_sk(sk); |
535 | unsigned char *b = skb->tail; | |
73c1f4a0 | 536 | struct inet_diag_msg *r; |
1da177e4 LT |
537 | struct nlmsghdr *nlh; |
538 | long tmo; | |
539 | ||
540722ff | 540 | nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r)); |
1da177e4 LT |
541 | nlh->nlmsg_flags = NLM_F_MULTI; |
542 | r = NLMSG_DATA(nlh); | |
543 | ||
73c1f4a0 ACM |
544 | r->idiag_family = sk->sk_family; |
545 | r->idiag_state = TCP_SYN_RECV; | |
546 | r->idiag_timer = 1; | |
547 | r->idiag_retrans = req->retrans; | |
1da177e4 | 548 | |
73c1f4a0 ACM |
549 | r->id.idiag_if = sk->sk_bound_dev_if; |
550 | r->id.idiag_cookie[0] = (u32)(unsigned long)req; | |
551 | r->id.idiag_cookie[1] = (u32)(((unsigned long)req >> 31) >> 1); | |
1da177e4 LT |
552 | |
553 | tmo = req->expires - jiffies; | |
554 | if (tmo < 0) | |
555 | tmo = 0; | |
556 | ||
73c1f4a0 ACM |
557 | r->id.idiag_sport = inet->sport; |
558 | r->id.idiag_dport = ireq->rmt_port; | |
559 | r->id.idiag_src[0] = ireq->loc_addr; | |
560 | r->id.idiag_dst[0] = ireq->rmt_addr; | |
561 | r->idiag_expires = jiffies_to_msecs(tmo); | |
562 | r->idiag_rqueue = 0; | |
563 | r->idiag_wqueue = 0; | |
564 | r->idiag_uid = sock_i_uid(sk); | |
565 | r->idiag_inode = 0; | |
505cbfc5 | 566 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
73c1f4a0 ACM |
567 | if (r->idiag_family == AF_INET6) { |
568 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_src, | |
ca304b61 | 569 | &inet6_rsk(req)->loc_addr); |
73c1f4a0 | 570 | ipv6_addr_copy((struct in6_addr *)r->id.idiag_dst, |
ca304b61 | 571 | &inet6_rsk(req)->rmt_addr); |
1da177e4 LT |
572 | } |
573 | #endif | |
574 | nlh->nlmsg_len = skb->tail - b; | |
575 | ||
576 | return skb->len; | |
577 | ||
578 | nlmsg_failure: | |
579 | skb_trim(skb, b - skb->data); | |
580 | return -1; | |
581 | } | |
582 | ||
73c1f4a0 | 583 | static int inet_diag_dump_reqs(struct sk_buff *skb, struct sock *sk, |
4e852c02 | 584 | struct netlink_callback *cb) |
1da177e4 | 585 | { |
73c1f4a0 ACM |
586 | struct inet_diag_entry entry; |
587 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); | |
463c84b9 | 588 | struct inet_connection_sock *icsk = inet_csk(sk); |
2ad69c55 | 589 | struct listen_sock *lopt; |
1da177e4 LT |
590 | struct rtattr *bc = NULL; |
591 | struct inet_sock *inet = inet_sk(sk); | |
592 | int j, s_j; | |
593 | int reqnum, s_reqnum; | |
594 | int err = 0; | |
595 | ||
596 | s_j = cb->args[3]; | |
597 | s_reqnum = cb->args[4]; | |
598 | ||
599 | if (s_j > 0) | |
600 | s_j--; | |
601 | ||
602 | entry.family = sk->sk_family; | |
603 | ||
463c84b9 | 604 | read_lock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 | 605 | |
463c84b9 | 606 | lopt = icsk->icsk_accept_queue.listen_opt; |
1da177e4 LT |
607 | if (!lopt || !lopt->qlen) |
608 | goto out; | |
609 | ||
610 | if (cb->nlh->nlmsg_len > 4 + NLMSG_SPACE(sizeof(*r))) { | |
611 | bc = (struct rtattr *)(r + 1); | |
612 | entry.sport = inet->num; | |
613 | entry.userlocks = sk->sk_userlocks; | |
614 | } | |
615 | ||
540722ff | 616 | for (j = s_j; j < lopt->nr_table_entries; j++) { |
60236fdd | 617 | struct request_sock *req, *head = lopt->syn_table[j]; |
1da177e4 LT |
618 | |
619 | reqnum = 0; | |
620 | for (req = head; req; reqnum++, req = req->dl_next) { | |
2e6599cb ACM |
621 | struct inet_request_sock *ireq = inet_rsk(req); |
622 | ||
1da177e4 LT |
623 | if (reqnum < s_reqnum) |
624 | continue; | |
73c1f4a0 ACM |
625 | if (r->id.idiag_dport != ireq->rmt_port && |
626 | r->id.idiag_dport) | |
1da177e4 LT |
627 | continue; |
628 | ||
629 | if (bc) { | |
630 | entry.saddr = | |
505cbfc5 | 631 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
1da177e4 | 632 | (entry.family == AF_INET6) ? |
ca304b61 | 633 | inet6_rsk(req)->loc_addr.s6_addr32 : |
1da177e4 | 634 | #endif |
2e6599cb | 635 | &ireq->loc_addr; |
4e852c02 | 636 | entry.daddr = |
505cbfc5 | 637 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) |
1da177e4 | 638 | (entry.family == AF_INET6) ? |
ca304b61 | 639 | inet6_rsk(req)->rmt_addr.s6_addr32 : |
1da177e4 | 640 | #endif |
2e6599cb ACM |
641 | &ireq->rmt_addr; |
642 | entry.dport = ntohs(ireq->rmt_port); | |
1da177e4 | 643 | |
73c1f4a0 | 644 | if (!inet_diag_bc_run(RTA_DATA(bc), |
1da177e4 LT |
645 | RTA_PAYLOAD(bc), &entry)) |
646 | continue; | |
647 | } | |
648 | ||
73c1f4a0 | 649 | err = inet_diag_fill_req(skb, sk, req, |
1da177e4 | 650 | NETLINK_CB(cb->skb).pid, |
540722ff | 651 | cb->nlh->nlmsg_seq, cb->nlh); |
1da177e4 LT |
652 | if (err < 0) { |
653 | cb->args[3] = j + 1; | |
654 | cb->args[4] = reqnum; | |
655 | goto out; | |
656 | } | |
657 | } | |
658 | ||
659 | s_reqnum = 0; | |
660 | } | |
661 | ||
662 | out: | |
463c84b9 | 663 | read_unlock_bh(&icsk->icsk_accept_queue.syn_wait_lock); |
1da177e4 LT |
664 | |
665 | return err; | |
666 | } | |
667 | ||
73c1f4a0 | 668 | static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb) |
1da177e4 LT |
669 | { |
670 | int i, num; | |
671 | int s_i, s_num; | |
73c1f4a0 | 672 | struct inet_diag_req *r = NLMSG_DATA(cb->nlh); |
4f5736c4 | 673 | const struct inet_diag_handler *handler; |
540722ff | 674 | struct inet_hashinfo *hashinfo; |
1da177e4 | 675 | |
4f5736c4 ACM |
676 | handler = inet_diag_table[cb->nlh->nlmsg_type]; |
677 | BUG_ON(handler == NULL); | |
678 | hashinfo = handler->idiag_hashinfo; | |
4e852c02 | 679 | |
1da177e4 LT |
680 | s_i = cb->args[1]; |
681 | s_num = num = cb->args[2]; | |
4f5736c4 | 682 | |
1da177e4 | 683 | if (cb->args[0] == 0) { |
73c1f4a0 | 684 | if (!(r->idiag_states & (TCPF_LISTEN | TCPF_SYN_RECV))) |
1da177e4 | 685 | goto skip_listen_ht; |
540722ff ACM |
686 | |
687 | inet_listen_lock(hashinfo); | |
0f7ff927 | 688 | for (i = s_i; i < INET_LHTABLE_SIZE; i++) { |
1da177e4 LT |
689 | struct sock *sk; |
690 | struct hlist_node *node; | |
691 | ||
692 | num = 0; | |
540722ff | 693 | sk_for_each(sk, node, &hashinfo->listening_hash[i]) { |
1da177e4 LT |
694 | struct inet_sock *inet = inet_sk(sk); |
695 | ||
696 | if (num < s_num) { | |
697 | num++; | |
698 | continue; | |
699 | } | |
700 | ||
73c1f4a0 ACM |
701 | if (r->id.idiag_sport != inet->sport && |
702 | r->id.idiag_sport) | |
1da177e4 LT |
703 | goto next_listen; |
704 | ||
73c1f4a0 ACM |
705 | if (!(r->idiag_states & TCPF_LISTEN) || |
706 | r->id.idiag_dport || | |
1da177e4 LT |
707 | cb->args[3] > 0) |
708 | goto syn_recv; | |
709 | ||
dff2c035 | 710 | if (inet_csk_diag_dump(sk, skb, cb) < 0) { |
540722ff | 711 | inet_listen_unlock(hashinfo); |
1da177e4 LT |
712 | goto done; |
713 | } | |
714 | ||
715 | syn_recv: | |
73c1f4a0 | 716 | if (!(r->idiag_states & TCPF_SYN_RECV)) |
1da177e4 LT |
717 | goto next_listen; |
718 | ||
73c1f4a0 | 719 | if (inet_diag_dump_reqs(skb, sk, cb) < 0) { |
540722ff | 720 | inet_listen_unlock(hashinfo); |
1da177e4 LT |
721 | goto done; |
722 | } | |
723 | ||
724 | next_listen: | |
725 | cb->args[3] = 0; | |
726 | cb->args[4] = 0; | |
727 | ++num; | |
728 | } | |
729 | ||
730 | s_num = 0; | |
731 | cb->args[3] = 0; | |
732 | cb->args[4] = 0; | |
733 | } | |
540722ff | 734 | inet_listen_unlock(hashinfo); |
1da177e4 LT |
735 | skip_listen_ht: |
736 | cb->args[0] = 1; | |
737 | s_i = num = s_num = 0; | |
738 | } | |
739 | ||
73c1f4a0 | 740 | if (!(r->idiag_states & ~(TCPF_LISTEN | TCPF_SYN_RECV))) |
1da177e4 LT |
741 | return skb->len; |
742 | ||
540722ff ACM |
743 | for (i = s_i; i < hashinfo->ehash_size; i++) { |
744 | struct inet_ehash_bucket *head = &hashinfo->ehash[i]; | |
1da177e4 LT |
745 | struct sock *sk; |
746 | struct hlist_node *node; | |
747 | ||
748 | if (i > s_i) | |
749 | s_num = 0; | |
750 | ||
751 | read_lock_bh(&head->lock); | |
1da177e4 LT |
752 | num = 0; |
753 | sk_for_each(sk, node, &head->chain) { | |
754 | struct inet_sock *inet = inet_sk(sk); | |
755 | ||
756 | if (num < s_num) | |
757 | goto next_normal; | |
73c1f4a0 | 758 | if (!(r->idiag_states & (1 << sk->sk_state))) |
1da177e4 | 759 | goto next_normal; |
73c1f4a0 ACM |
760 | if (r->id.idiag_sport != inet->sport && |
761 | r->id.idiag_sport) | |
1da177e4 | 762 | goto next_normal; |
4e852c02 ACM |
763 | if (r->id.idiag_dport != inet->dport && |
764 | r->id.idiag_dport) | |
1da177e4 | 765 | goto next_normal; |
dff2c035 | 766 | if (inet_csk_diag_dump(sk, skb, cb) < 0) { |
1da177e4 LT |
767 | read_unlock_bh(&head->lock); |
768 | goto done; | |
769 | } | |
770 | next_normal: | |
771 | ++num; | |
772 | } | |
773 | ||
73c1f4a0 | 774 | if (r->idiag_states & TCPF_TIME_WAIT) { |
c7d58aab ACM |
775 | struct inet_timewait_sock *tw; |
776 | ||
777 | inet_twsk_for_each(tw, node, | |
540722ff | 778 | &hashinfo->ehash[i + hashinfo->ehash_size].chain) { |
1da177e4 LT |
779 | |
780 | if (num < s_num) | |
781 | goto next_dying; | |
7dbf0755 | 782 | if (r->id.idiag_sport != tw->tw_sport && |
73c1f4a0 | 783 | r->id.idiag_sport) |
1da177e4 | 784 | goto next_dying; |
7dbf0755 | 785 | if (r->id.idiag_dport != tw->tw_dport && |
73c1f4a0 | 786 | r->id.idiag_dport) |
1da177e4 | 787 | goto next_dying; |
c7d58aab | 788 | if (inet_twsk_diag_dump(tw, skb, cb) < 0) { |
1da177e4 LT |
789 | read_unlock_bh(&head->lock); |
790 | goto done; | |
791 | } | |
792 | next_dying: | |
793 | ++num; | |
794 | } | |
795 | } | |
796 | read_unlock_bh(&head->lock); | |
797 | } | |
798 | ||
799 | done: | |
800 | cb->args[1] = i; | |
801 | cb->args[2] = num; | |
802 | return skb->len; | |
803 | } | |
804 | ||
4e852c02 | 805 | static inline int inet_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) |
1da177e4 LT |
806 | { |
807 | if (!(nlh->nlmsg_flags&NLM_F_REQUEST)) | |
808 | return 0; | |
809 | ||
4f5736c4 | 810 | if (nlh->nlmsg_type >= INET_DIAG_GETSOCK_MAX) |
1da177e4 LT |
811 | goto err_inval; |
812 | ||
4f5736c4 ACM |
813 | if (inet_diag_table[nlh->nlmsg_type] == NULL) |
814 | return -ENOENT; | |
815 | ||
73c1f4a0 | 816 | if (NLMSG_LENGTH(sizeof(struct inet_diag_req)) > skb->len) |
1da177e4 LT |
817 | goto err_inval; |
818 | ||
819 | if (nlh->nlmsg_flags&NLM_F_DUMP) { | |
73c1f4a0 ACM |
820 | if (nlh->nlmsg_len > |
821 | (4 + NLMSG_SPACE(sizeof(struct inet_diag_req)))) { | |
822 | struct rtattr *rta = (void *)(NLMSG_DATA(nlh) + | |
823 | sizeof(struct inet_diag_req)); | |
824 | if (rta->rta_type != INET_DIAG_REQ_BYTECODE || | |
1da177e4 | 825 | rta->rta_len < 8 || |
73c1f4a0 ACM |
826 | rta->rta_len > |
827 | (nlh->nlmsg_len - | |
828 | NLMSG_SPACE(sizeof(struct inet_diag_req)))) | |
1da177e4 | 829 | goto err_inval; |
73c1f4a0 | 830 | if (inet_diag_bc_audit(RTA_DATA(rta), RTA_PAYLOAD(rta))) |
1da177e4 LT |
831 | goto err_inval; |
832 | } | |
73c1f4a0 | 833 | return netlink_dump_start(idiagnl, skb, nlh, |
a8f74b22 | 834 | inet_diag_dump, NULL); |
4e852c02 | 835 | } else |
73c1f4a0 | 836 | return inet_diag_get_exact(skb, nlh); |
1da177e4 LT |
837 | |
838 | err_inval: | |
839 | return -EINVAL; | |
840 | } | |
841 | ||
842 | ||
73c1f4a0 | 843 | static inline void inet_diag_rcv_skb(struct sk_buff *skb) |
1da177e4 | 844 | { |
1da177e4 | 845 | if (skb->len >= NLMSG_SPACE(0)) { |
4e852c02 ACM |
846 | int err; |
847 | struct nlmsghdr *nlh = (struct nlmsghdr *)skb->data; | |
848 | ||
849 | if (nlh->nlmsg_len < sizeof(*nlh) || | |
850 | skb->len < nlh->nlmsg_len) | |
1da177e4 | 851 | return; |
73c1f4a0 | 852 | err = inet_diag_rcv_msg(skb, nlh); |
4e852c02 | 853 | if (err || nlh->nlmsg_flags & NLM_F_ACK) |
1da177e4 LT |
854 | netlink_ack(skb, nlh, err); |
855 | } | |
856 | } | |
857 | ||
73c1f4a0 | 858 | static void inet_diag_rcv(struct sock *sk, int len) |
1da177e4 LT |
859 | { |
860 | struct sk_buff *skb; | |
2a0a6ebe | 861 | unsigned int qlen = skb_queue_len(&sk->sk_receive_queue); |
1da177e4 | 862 | |
2a0a6ebe | 863 | while (qlen-- && (skb = skb_dequeue(&sk->sk_receive_queue))) { |
73c1f4a0 | 864 | inet_diag_rcv_skb(skb); |
1da177e4 LT |
865 | kfree_skb(skb); |
866 | } | |
867 | } | |
868 | ||
4f5736c4 ACM |
869 | static DEFINE_SPINLOCK(inet_diag_register_lock); |
870 | ||
871 | int inet_diag_register(const struct inet_diag_handler *h) | |
872 | { | |
873 | const __u16 type = h->idiag_type; | |
874 | int err = -EINVAL; | |
875 | ||
876 | if (type >= INET_DIAG_GETSOCK_MAX) | |
877 | goto out; | |
878 | ||
879 | spin_lock(&inet_diag_register_lock); | |
880 | err = -EEXIST; | |
881 | if (inet_diag_table[type] == NULL) { | |
882 | inet_diag_table[type] = h; | |
883 | err = 0; | |
884 | } | |
885 | spin_unlock(&inet_diag_register_lock); | |
886 | out: | |
887 | return err; | |
888 | } | |
889 | EXPORT_SYMBOL_GPL(inet_diag_register); | |
890 | ||
891 | void inet_diag_unregister(const struct inet_diag_handler *h) | |
892 | { | |
893 | const __u16 type = h->idiag_type; | |
894 | ||
895 | if (type >= INET_DIAG_GETSOCK_MAX) | |
896 | return; | |
897 | ||
898 | spin_lock(&inet_diag_register_lock); | |
899 | inet_diag_table[type] = NULL; | |
900 | spin_unlock(&inet_diag_register_lock); | |
901 | ||
902 | synchronize_rcu(); | |
903 | } | |
904 | EXPORT_SYMBOL_GPL(inet_diag_unregister); | |
905 | ||
73c1f4a0 | 906 | static int __init inet_diag_init(void) |
1da177e4 | 907 | { |
4f5736c4 ACM |
908 | const int inet_diag_table_size = (INET_DIAG_GETSOCK_MAX * |
909 | sizeof(struct inet_diag_handler *)); | |
910 | int err = -ENOMEM; | |
911 | ||
912 | inet_diag_table = kmalloc(inet_diag_table_size, GFP_KERNEL); | |
913 | if (!inet_diag_table) | |
914 | goto out; | |
915 | ||
916 | memset(inet_diag_table, 0, inet_diag_table_size); | |
06628607 | 917 | idiagnl = netlink_kernel_create(NETLINK_INET_DIAG, 0, inet_diag_rcv, |
73c1f4a0 ACM |
918 | THIS_MODULE); |
919 | if (idiagnl == NULL) | |
4f5736c4 | 920 | goto out_free_table; |
17b085ea | 921 | err = 0; |
4f5736c4 ACM |
922 | out: |
923 | return err; | |
4f5736c4 ACM |
924 | out_free_table: |
925 | kfree(inet_diag_table); | |
926 | goto out; | |
1da177e4 LT |
927 | } |
928 | ||
73c1f4a0 | 929 | static void __exit inet_diag_exit(void) |
1da177e4 | 930 | { |
73c1f4a0 | 931 | sock_release(idiagnl->sk_socket); |
4f5736c4 | 932 | kfree(inet_diag_table); |
1da177e4 LT |
933 | } |
934 | ||
73c1f4a0 ACM |
935 | module_init(inet_diag_init); |
936 | module_exit(inet_diag_exit); | |
1da177e4 | 937 | MODULE_LICENSE("GPL"); |