Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * This program is free software; you can redistribute it and/or modify | |
3 | * it under the terms of the GNU General Public License as published by | |
4 | * the Free Software Foundation; either version 2 of the License, or | |
5 | * (at your option) any later version. | |
6 | * | |
7 | * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk) | |
8 | */ | |
9 | #include <linux/errno.h> | |
10 | #include <linux/types.h> | |
11 | #include <linux/socket.h> | |
12 | #include <linux/in.h> | |
13 | #include <linux/kernel.h> | |
1da177e4 LT |
14 | #include <linux/timer.h> |
15 | #include <linux/string.h> | |
16 | #include <linux/sockios.h> | |
17 | #include <linux/net.h> | |
5a0e3ad6 | 18 | #include <linux/slab.h> |
1da177e4 LT |
19 | #include <net/ax25.h> |
20 | #include <linux/inet.h> | |
21 | #include <linux/netdevice.h> | |
22 | #include <linux/skbuff.h> | |
23 | #include <net/sock.h> | |
c752f073 | 24 | #include <net/tcp_states.h> |
1da177e4 LT |
25 | #include <linux/fcntl.h> |
26 | #include <linux/mm.h> | |
27 | #include <linux/interrupt.h> | |
28 | #include <net/rose.h> | |
29 | ||
30 | static int rose_create_facilities(unsigned char *buffer, struct rose_sock *rose); | |
31 | ||
32 | /* | |
33 | * This routine purges all of the queues of frames. | |
34 | */ | |
35 | void rose_clear_queues(struct sock *sk) | |
36 | { | |
37 | skb_queue_purge(&sk->sk_write_queue); | |
38 | skb_queue_purge(&rose_sk(sk)->ack_queue); | |
39 | } | |
40 | ||
41 | /* | |
42 | * This routine purges the input queue of those frames that have been | |
43 | * acknowledged. This replaces the boxes labelled "V(a) <- N(r)" on the | |
44 | * SDL diagram. | |
45 | */ | |
46 | void rose_frames_acked(struct sock *sk, unsigned short nr) | |
47 | { | |
48 | struct sk_buff *skb; | |
49 | struct rose_sock *rose = rose_sk(sk); | |
50 | ||
51 | /* | |
52 | * Remove all the ack-ed frames from the ack queue. | |
53 | */ | |
54 | if (rose->va != nr) { | |
55 | while (skb_peek(&rose->ack_queue) != NULL && rose->va != nr) { | |
56 | skb = skb_dequeue(&rose->ack_queue); | |
57 | kfree_skb(skb); | |
58 | rose->va = (rose->va + 1) % ROSE_MODULUS; | |
59 | } | |
60 | } | |
61 | } | |
62 | ||
63 | void rose_requeue_frames(struct sock *sk) | |
64 | { | |
65 | struct sk_buff *skb, *skb_prev = NULL; | |
66 | ||
67 | /* | |
68 | * Requeue all the un-ack-ed frames on the output queue to be picked | |
69 | * up by rose_kick. This arrangement handles the possibility of an | |
70 | * empty output queue. | |
71 | */ | |
72 | while ((skb = skb_dequeue(&rose_sk(sk)->ack_queue)) != NULL) { | |
73 | if (skb_prev == NULL) | |
74 | skb_queue_head(&sk->sk_write_queue, skb); | |
75 | else | |
8728b834 | 76 | skb_append(skb_prev, skb, &sk->sk_write_queue); |
1da177e4 LT |
77 | skb_prev = skb; |
78 | } | |
79 | } | |
80 | ||
81 | /* | |
82 | * Validate that the value of nr is between va and vs. Return true or | |
83 | * false for testing. | |
84 | */ | |
85 | int rose_validate_nr(struct sock *sk, unsigned short nr) | |
86 | { | |
87 | struct rose_sock *rose = rose_sk(sk); | |
88 | unsigned short vc = rose->va; | |
89 | ||
90 | while (vc != rose->vs) { | |
91 | if (nr == vc) return 1; | |
92 | vc = (vc + 1) % ROSE_MODULUS; | |
93 | } | |
94 | ||
95 | return nr == rose->vs; | |
96 | } | |
97 | ||
98 | /* | |
99 | * This routine is called when the packet layer internally generates a | |
100 | * control frame. | |
101 | */ | |
102 | void rose_write_internal(struct sock *sk, int frametype) | |
103 | { | |
104 | struct rose_sock *rose = rose_sk(sk); | |
105 | struct sk_buff *skb; | |
106 | unsigned char *dptr; | |
107 | unsigned char lci1, lci2; | |
e5dcc0c3 ED |
108 | int maxfaclen = 0; |
109 | int len, faclen; | |
110 | int reserve; | |
1da177e4 | 111 | |
e5dcc0c3 ED |
112 | reserve = AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + 1; |
113 | len = ROSE_MIN_LEN; | |
1da177e4 LT |
114 | |
115 | switch (frametype) { | |
116 | case ROSE_CALL_REQUEST: | |
117 | len += 1 + ROSE_ADDR_LEN + ROSE_ADDR_LEN; | |
e5dcc0c3 | 118 | maxfaclen = 256; |
1da177e4 LT |
119 | break; |
120 | case ROSE_CALL_ACCEPTED: | |
121 | case ROSE_CLEAR_REQUEST: | |
122 | case ROSE_RESET_REQUEST: | |
123 | len += 2; | |
124 | break; | |
125 | } | |
126 | ||
e5dcc0c3 ED |
127 | skb = alloc_skb(reserve + len + maxfaclen, GFP_ATOMIC); |
128 | if (!skb) | |
1da177e4 LT |
129 | return; |
130 | ||
131 | /* | |
132 | * Space for AX.25 header and PID. | |
133 | */ | |
e5dcc0c3 | 134 | skb_reserve(skb, reserve); |
1da177e4 | 135 | |
e5dcc0c3 | 136 | dptr = skb_put(skb, len); |
1da177e4 LT |
137 | |
138 | lci1 = (rose->lci >> 8) & 0x0F; | |
139 | lci2 = (rose->lci >> 0) & 0xFF; | |
140 | ||
141 | switch (frametype) { | |
142 | case ROSE_CALL_REQUEST: | |
143 | *dptr++ = ROSE_GFI | lci1; | |
144 | *dptr++ = lci2; | |
145 | *dptr++ = frametype; | |
e0bccd31 | 146 | *dptr++ = ROSE_CALL_REQ_ADDR_LEN_VAL; |
1da177e4 LT |
147 | memcpy(dptr, &rose->dest_addr, ROSE_ADDR_LEN); |
148 | dptr += ROSE_ADDR_LEN; | |
149 | memcpy(dptr, &rose->source_addr, ROSE_ADDR_LEN); | |
150 | dptr += ROSE_ADDR_LEN; | |
e5dcc0c3 ED |
151 | faclen = rose_create_facilities(dptr, rose); |
152 | skb_put(skb, faclen); | |
1da177e4 LT |
153 | dptr += faclen; |
154 | break; | |
155 | ||
156 | case ROSE_CALL_ACCEPTED: | |
157 | *dptr++ = ROSE_GFI | lci1; | |
158 | *dptr++ = lci2; | |
159 | *dptr++ = frametype; | |
160 | *dptr++ = 0x00; /* Address length */ | |
161 | *dptr++ = 0; /* Facilities length */ | |
162 | break; | |
163 | ||
164 | case ROSE_CLEAR_REQUEST: | |
165 | *dptr++ = ROSE_GFI | lci1; | |
166 | *dptr++ = lci2; | |
167 | *dptr++ = frametype; | |
168 | *dptr++ = rose->cause; | |
169 | *dptr++ = rose->diagnostic; | |
170 | break; | |
171 | ||
172 | case ROSE_RESET_REQUEST: | |
173 | *dptr++ = ROSE_GFI | lci1; | |
174 | *dptr++ = lci2; | |
175 | *dptr++ = frametype; | |
176 | *dptr++ = ROSE_DTE_ORIGINATED; | |
177 | *dptr++ = 0; | |
178 | break; | |
179 | ||
180 | case ROSE_RR: | |
181 | case ROSE_RNR: | |
182 | *dptr++ = ROSE_GFI | lci1; | |
183 | *dptr++ = lci2; | |
184 | *dptr = frametype; | |
185 | *dptr++ |= (rose->vr << 5) & 0xE0; | |
186 | break; | |
187 | ||
188 | case ROSE_CLEAR_CONFIRMATION: | |
189 | case ROSE_RESET_CONFIRMATION: | |
190 | *dptr++ = ROSE_GFI | lci1; | |
191 | *dptr++ = lci2; | |
192 | *dptr++ = frametype; | |
193 | break; | |
194 | ||
195 | default: | |
196 | printk(KERN_ERR "ROSE: rose_write_internal - invalid frametype %02X\n", frametype); | |
197 | kfree_skb(skb); | |
198 | return; | |
199 | } | |
200 | ||
201 | rose_transmit_link(skb, rose->neighbour); | |
202 | } | |
203 | ||
204 | int rose_decode(struct sk_buff *skb, int *ns, int *nr, int *q, int *d, int *m) | |
205 | { | |
206 | unsigned char *frame; | |
207 | ||
208 | frame = skb->data; | |
209 | ||
210 | *ns = *nr = *q = *d = *m = 0; | |
211 | ||
212 | switch (frame[2]) { | |
213 | case ROSE_CALL_REQUEST: | |
214 | case ROSE_CALL_ACCEPTED: | |
215 | case ROSE_CLEAR_REQUEST: | |
216 | case ROSE_CLEAR_CONFIRMATION: | |
217 | case ROSE_RESET_REQUEST: | |
218 | case ROSE_RESET_CONFIRMATION: | |
219 | return frame[2]; | |
220 | default: | |
221 | break; | |
222 | } | |
223 | ||
224 | if ((frame[2] & 0x1F) == ROSE_RR || | |
225 | (frame[2] & 0x1F) == ROSE_RNR) { | |
226 | *nr = (frame[2] >> 5) & 0x07; | |
227 | return frame[2] & 0x1F; | |
228 | } | |
229 | ||
230 | if ((frame[2] & 0x01) == ROSE_DATA) { | |
231 | *q = (frame[0] & ROSE_Q_BIT) == ROSE_Q_BIT; | |
232 | *d = (frame[0] & ROSE_D_BIT) == ROSE_D_BIT; | |
233 | *m = (frame[2] & ROSE_M_BIT) == ROSE_M_BIT; | |
234 | *nr = (frame[2] >> 5) & 0x07; | |
235 | *ns = (frame[2] >> 1) & 0x07; | |
236 | return ROSE_DATA; | |
237 | } | |
238 | ||
239 | return ROSE_ILLEGAL; | |
240 | } | |
241 | ||
242 | static int rose_parse_national(unsigned char *p, struct rose_facilities_struct *facilities, int len) | |
243 | { | |
244 | unsigned char *pt; | |
245 | unsigned char l, lg, n = 0; | |
246 | int fac_national_digis_received = 0; | |
247 | ||
248 | do { | |
249 | switch (*p & 0xC0) { | |
250 | case 0x00: | |
e0bccd31 BH |
251 | if (len < 2) |
252 | return -1; | |
1da177e4 LT |
253 | p += 2; |
254 | n += 2; | |
255 | len -= 2; | |
256 | break; | |
257 | ||
258 | case 0x40: | |
e0bccd31 BH |
259 | if (len < 3) |
260 | return -1; | |
1da177e4 LT |
261 | if (*p == FAC_NATIONAL_RAND) |
262 | facilities->rand = ((p[1] << 8) & 0xFF00) + ((p[2] << 0) & 0x00FF); | |
263 | p += 3; | |
264 | n += 3; | |
265 | len -= 3; | |
266 | break; | |
267 | ||
268 | case 0x80: | |
e0bccd31 BH |
269 | if (len < 4) |
270 | return -1; | |
1da177e4 LT |
271 | p += 4; |
272 | n += 4; | |
273 | len -= 4; | |
274 | break; | |
275 | ||
276 | case 0xC0: | |
e0bccd31 BH |
277 | if (len < 2) |
278 | return -1; | |
1da177e4 | 279 | l = p[1]; |
e0bccd31 BH |
280 | if (len < 2 + l) |
281 | return -1; | |
1da177e4 LT |
282 | if (*p == FAC_NATIONAL_DEST_DIGI) { |
283 | if (!fac_national_digis_received) { | |
e0bccd31 BH |
284 | if (l < AX25_ADDR_LEN) |
285 | return -1; | |
1da177e4 LT |
286 | memcpy(&facilities->source_digis[0], p + 2, AX25_ADDR_LEN); |
287 | facilities->source_ndigis = 1; | |
288 | } | |
289 | } | |
290 | else if (*p == FAC_NATIONAL_SRC_DIGI) { | |
291 | if (!fac_national_digis_received) { | |
e0bccd31 BH |
292 | if (l < AX25_ADDR_LEN) |
293 | return -1; | |
1da177e4 LT |
294 | memcpy(&facilities->dest_digis[0], p + 2, AX25_ADDR_LEN); |
295 | facilities->dest_ndigis = 1; | |
296 | } | |
297 | } | |
298 | else if (*p == FAC_NATIONAL_FAIL_CALL) { | |
e0bccd31 BH |
299 | if (l < AX25_ADDR_LEN) |
300 | return -1; | |
1da177e4 LT |
301 | memcpy(&facilities->fail_call, p + 2, AX25_ADDR_LEN); |
302 | } | |
303 | else if (*p == FAC_NATIONAL_FAIL_ADD) { | |
e0bccd31 BH |
304 | if (l < 1 + ROSE_ADDR_LEN) |
305 | return -1; | |
1da177e4 LT |
306 | memcpy(&facilities->fail_addr, p + 3, ROSE_ADDR_LEN); |
307 | } | |
308 | else if (*p == FAC_NATIONAL_DIGIS) { | |
e0bccd31 BH |
309 | if (l % AX25_ADDR_LEN) |
310 | return -1; | |
1da177e4 LT |
311 | fac_national_digis_received = 1; |
312 | facilities->source_ndigis = 0; | |
313 | facilities->dest_ndigis = 0; | |
314 | for (pt = p + 2, lg = 0 ; lg < l ; pt += AX25_ADDR_LEN, lg += AX25_ADDR_LEN) { | |
be20250c DR |
315 | if (pt[6] & AX25_HBIT) { |
316 | if (facilities->dest_ndigis >= ROSE_MAX_DIGIS) | |
317 | return -1; | |
1da177e4 | 318 | memcpy(&facilities->dest_digis[facilities->dest_ndigis++], pt, AX25_ADDR_LEN); |
be20250c DR |
319 | } else { |
320 | if (facilities->source_ndigis >= ROSE_MAX_DIGIS) | |
321 | return -1; | |
1da177e4 | 322 | memcpy(&facilities->source_digis[facilities->source_ndigis++], pt, AX25_ADDR_LEN); |
be20250c | 323 | } |
1da177e4 LT |
324 | } |
325 | } | |
326 | p += l + 2; | |
327 | n += l + 2; | |
328 | len -= l + 2; | |
329 | break; | |
330 | } | |
331 | } while (*p != 0x00 && len > 0); | |
332 | ||
333 | return n; | |
334 | } | |
335 | ||
336 | static int rose_parse_ccitt(unsigned char *p, struct rose_facilities_struct *facilities, int len) | |
337 | { | |
338 | unsigned char l, n = 0; | |
339 | char callsign[11]; | |
340 | ||
341 | do { | |
342 | switch (*p & 0xC0) { | |
343 | case 0x00: | |
e0bccd31 BH |
344 | if (len < 2) |
345 | return -1; | |
1da177e4 LT |
346 | p += 2; |
347 | n += 2; | |
348 | len -= 2; | |
349 | break; | |
350 | ||
351 | case 0x40: | |
e0bccd31 BH |
352 | if (len < 3) |
353 | return -1; | |
1da177e4 LT |
354 | p += 3; |
355 | n += 3; | |
356 | len -= 3; | |
357 | break; | |
358 | ||
359 | case 0x80: | |
e0bccd31 BH |
360 | if (len < 4) |
361 | return -1; | |
1da177e4 LT |
362 | p += 4; |
363 | n += 4; | |
364 | len -= 4; | |
365 | break; | |
366 | ||
367 | case 0xC0: | |
e0bccd31 BH |
368 | if (len < 2) |
369 | return -1; | |
1da177e4 | 370 | l = p[1]; |
be20250c DR |
371 | |
372 | /* Prevent overflows*/ | |
373 | if (l < 10 || l > 20) | |
374 | return -1; | |
375 | ||
1da177e4 LT |
376 | if (*p == FAC_CCITT_DEST_NSAP) { |
377 | memcpy(&facilities->source_addr, p + 7, ROSE_ADDR_LEN); | |
378 | memcpy(callsign, p + 12, l - 10); | |
379 | callsign[l - 10] = '\0'; | |
baed16a7 | 380 | asc2ax(&facilities->source_call, callsign); |
1da177e4 LT |
381 | } |
382 | if (*p == FAC_CCITT_SRC_NSAP) { | |
383 | memcpy(&facilities->dest_addr, p + 7, ROSE_ADDR_LEN); | |
384 | memcpy(callsign, p + 12, l - 10); | |
385 | callsign[l - 10] = '\0'; | |
baed16a7 | 386 | asc2ax(&facilities->dest_call, callsign); |
1da177e4 LT |
387 | } |
388 | p += l + 2; | |
389 | n += l + 2; | |
390 | len -= l + 2; | |
391 | break; | |
392 | } | |
393 | } while (*p != 0x00 && len > 0); | |
394 | ||
395 | return n; | |
396 | } | |
397 | ||
e0bccd31 | 398 | int rose_parse_facilities(unsigned char *p, unsigned packet_len, |
1da177e4 LT |
399 | struct rose_facilities_struct *facilities) |
400 | { | |
401 | int facilities_len, len; | |
402 | ||
403 | facilities_len = *p++; | |
404 | ||
95c96174 | 405 | if (facilities_len == 0 || (unsigned int)facilities_len > packet_len) |
1da177e4 LT |
406 | return 0; |
407 | ||
e0bccd31 BH |
408 | while (facilities_len >= 3 && *p == 0x00) { |
409 | facilities_len--; | |
410 | p++; | |
411 | ||
412 | switch (*p) { | |
413 | case FAC_NATIONAL: /* National */ | |
414 | len = rose_parse_national(p + 1, facilities, facilities_len - 1); | |
415 | break; | |
416 | ||
417 | case FAC_CCITT: /* CCITT */ | |
418 | len = rose_parse_ccitt(p + 1, facilities, facilities_len - 1); | |
419 | break; | |
420 | ||
421 | default: | |
422 | printk(KERN_DEBUG "ROSE: rose_parse_facilities - unknown facilities family %02X\n", *p); | |
423 | len = 1; | |
424 | break; | |
425 | } | |
426 | ||
427 | if (len < 0) | |
428 | return 0; | |
429 | if (WARN_ON(len >= facilities_len)) | |
430 | return 0; | |
431 | facilities_len -= len + 1; | |
432 | p += len + 1; | |
1da177e4 LT |
433 | } |
434 | ||
e0bccd31 | 435 | return facilities_len == 0; |
1da177e4 LT |
436 | } |
437 | ||
438 | static int rose_create_facilities(unsigned char *buffer, struct rose_sock *rose) | |
439 | { | |
440 | unsigned char *p = buffer + 1; | |
441 | char *callsign; | |
f75268cd | 442 | char buf[11]; |
1da177e4 LT |
443 | int len, nb; |
444 | ||
445 | /* National Facilities */ | |
446 | if (rose->rand != 0 || rose->source_ndigis == 1 || rose->dest_ndigis == 1) { | |
447 | *p++ = 0x00; | |
448 | *p++ = FAC_NATIONAL; | |
449 | ||
450 | if (rose->rand != 0) { | |
451 | *p++ = FAC_NATIONAL_RAND; | |
452 | *p++ = (rose->rand >> 8) & 0xFF; | |
453 | *p++ = (rose->rand >> 0) & 0xFF; | |
454 | } | |
455 | ||
456 | /* Sent before older facilities */ | |
457 | if ((rose->source_ndigis > 0) || (rose->dest_ndigis > 0)) { | |
458 | int maxdigi = 0; | |
459 | *p++ = FAC_NATIONAL_DIGIS; | |
460 | *p++ = AX25_ADDR_LEN * (rose->source_ndigis + rose->dest_ndigis); | |
461 | for (nb = 0 ; nb < rose->source_ndigis ; nb++) { | |
462 | if (++maxdigi >= ROSE_MAX_DIGIS) | |
463 | break; | |
464 | memcpy(p, &rose->source_digis[nb], AX25_ADDR_LEN); | |
465 | p[6] |= AX25_HBIT; | |
466 | p += AX25_ADDR_LEN; | |
467 | } | |
468 | for (nb = 0 ; nb < rose->dest_ndigis ; nb++) { | |
469 | if (++maxdigi >= ROSE_MAX_DIGIS) | |
470 | break; | |
471 | memcpy(p, &rose->dest_digis[nb], AX25_ADDR_LEN); | |
472 | p[6] &= ~AX25_HBIT; | |
473 | p += AX25_ADDR_LEN; | |
474 | } | |
475 | } | |
476 | ||
477 | /* For compatibility */ | |
478 | if (rose->source_ndigis > 0) { | |
479 | *p++ = FAC_NATIONAL_SRC_DIGI; | |
480 | *p++ = AX25_ADDR_LEN; | |
481 | memcpy(p, &rose->source_digis[0], AX25_ADDR_LEN); | |
482 | p += AX25_ADDR_LEN; | |
483 | } | |
484 | ||
485 | /* For compatibility */ | |
486 | if (rose->dest_ndigis > 0) { | |
487 | *p++ = FAC_NATIONAL_DEST_DIGI; | |
488 | *p++ = AX25_ADDR_LEN; | |
489 | memcpy(p, &rose->dest_digis[0], AX25_ADDR_LEN); | |
490 | p += AX25_ADDR_LEN; | |
491 | } | |
492 | } | |
493 | ||
494 | *p++ = 0x00; | |
495 | *p++ = FAC_CCITT; | |
496 | ||
497 | *p++ = FAC_CCITT_DEST_NSAP; | |
498 | ||
f75268cd | 499 | callsign = ax2asc(buf, &rose->dest_call); |
1da177e4 LT |
500 | |
501 | *p++ = strlen(callsign) + 10; | |
502 | *p++ = (strlen(callsign) + 9) * 2; /* ??? */ | |
503 | ||
504 | *p++ = 0x47; *p++ = 0x00; *p++ = 0x11; | |
505 | *p++ = ROSE_ADDR_LEN * 2; | |
506 | memcpy(p, &rose->dest_addr, ROSE_ADDR_LEN); | |
507 | p += ROSE_ADDR_LEN; | |
508 | ||
509 | memcpy(p, callsign, strlen(callsign)); | |
510 | p += strlen(callsign); | |
511 | ||
512 | *p++ = FAC_CCITT_SRC_NSAP; | |
513 | ||
f75268cd | 514 | callsign = ax2asc(buf, &rose->source_call); |
1da177e4 LT |
515 | |
516 | *p++ = strlen(callsign) + 10; | |
517 | *p++ = (strlen(callsign) + 9) * 2; /* ??? */ | |
518 | ||
519 | *p++ = 0x47; *p++ = 0x00; *p++ = 0x11; | |
520 | *p++ = ROSE_ADDR_LEN * 2; | |
521 | memcpy(p, &rose->source_addr, ROSE_ADDR_LEN); | |
522 | p += ROSE_ADDR_LEN; | |
523 | ||
524 | memcpy(p, callsign, strlen(callsign)); | |
525 | p += strlen(callsign); | |
526 | ||
527 | len = p - buffer; | |
528 | buffer[0] = len - 1; | |
529 | ||
530 | return len; | |
531 | } | |
532 | ||
533 | void rose_disconnect(struct sock *sk, int reason, int cause, int diagnostic) | |
534 | { | |
535 | struct rose_sock *rose = rose_sk(sk); | |
536 | ||
537 | rose_stop_timer(sk); | |
538 | rose_stop_idletimer(sk); | |
539 | ||
540 | rose_clear_queues(sk); | |
541 | ||
542 | rose->lci = 0; | |
543 | rose->state = ROSE_STATE_0; | |
544 | ||
545 | if (cause != -1) | |
546 | rose->cause = cause; | |
547 | ||
548 | if (diagnostic != -1) | |
549 | rose->diagnostic = diagnostic; | |
550 | ||
551 | sk->sk_state = TCP_CLOSE; | |
552 | sk->sk_err = reason; | |
553 | sk->sk_shutdown |= SEND_SHUTDOWN; | |
554 | ||
555 | if (!sock_flag(sk, SOCK_DEAD)) { | |
556 | sk->sk_state_change(sk); | |
557 | sock_set_flag(sk, SOCK_DEAD); | |
558 | } | |
559 | } |