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028094f4 | 1 | /* $OpenBSD: nchan.c,v 1.55 2006/07/11 20:07:25 stevesk Exp $ */ |
aa3378df | 2 | /* |
8ab5f6b2 | 3 | * Copyright (c) 1999, 2000, 2001, 2002 Markus Friedl. All rights reserved. |
aa3378df | 4 | * |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * 2. Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in the | |
12 | * documentation and/or other materials provided with the distribution. | |
aa3378df | 13 | * |
14 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
15 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
16 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
17 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
18 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
19 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
20 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
21 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
22 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
23 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
24 | */ | |
25 | ||
8efc0c15 | 26 | #include "includes.h" |
8efc0c15 | 27 | |
5b04a8bf | 28 | #include <sys/types.h> |
29 | #include <sys/socket.h> | |
30 | ||
028094f4 | 31 | #include <errno.h> |
32 | ||
42f11eb2 | 33 | #include "ssh1.h" |
34 | #include "ssh2.h" | |
8efc0c15 | 35 | #include "buffer.h" |
36 | #include "packet.h" | |
37 | #include "channels.h" | |
7e7327a1 | 38 | #include "compat.h" |
42f11eb2 | 39 | #include "log.h" |
8efc0c15 | 40 | |
f048f3e2 | 41 | /* |
42 | * SSH Protocol 1.5 aka New Channel Protocol | |
43 | * Thanks to Martina, Axel and everyone who left Erlangen, leaving me bored. | |
44 | * Written by Markus Friedl in October 1999 | |
45 | * | |
46 | * Protocol versions 1.3 and 1.5 differ in the handshake protocol used for the | |
47 | * tear down of channels: | |
48 | * | |
49 | * 1.3: strict request-ack-protocol: | |
f2107e97 | 50 | * CLOSE -> |
51 | * <- CLOSE_CONFIRM | |
f048f3e2 | 52 | * |
53 | * 1.5: uses variations of: | |
f2107e97 | 54 | * IEOF -> |
55 | * <- OCLOSE | |
56 | * <- IEOF | |
57 | * OCLOSE -> | |
58 | * i.e. both sides have to close the channel | |
f048f3e2 | 59 | * |
60 | * 2.0: the EOF messages are optional | |
61 | * | |
62 | * See the debugging output from 'ssh -v' and 'sshd -d' of | |
63 | * ssh-1.2.27 as an example. | |
64 | * | |
65 | */ | |
1b73841d | 66 | |
7e7327a1 | 67 | /* functions manipulating channel states */ |
8efc0c15 | 68 | /* |
5260325f | 69 | * EVENTS update channel input/output states execute ACTIONS |
8efc0c15 | 70 | */ |
7e7327a1 | 71 | /* |
72 | * ACTIONS: should never update the channel states | |
73 | */ | |
396c147e | 74 | static void chan_send_ieof1(Channel *); |
75 | static void chan_send_oclose1(Channel *); | |
76 | static void chan_send_close2(Channel *); | |
77 | static void chan_send_eof2(Channel *); | |
7e7327a1 | 78 | |
7e7327a1 | 79 | /* helper */ |
396c147e | 80 | static void chan_shutdown_write(Channel *); |
81 | static void chan_shutdown_read(Channel *); | |
7e7327a1 | 82 | |
368e9dfc | 83 | static char *ostates[] = { "open", "drain", "wait_ieof", "closed" }; |
84 | static char *istates[] = { "open", "drain", "wait_oclose", "closed" }; | |
85 | ||
86 | static void | |
87 | chan_set_istate(Channel *c, u_int next) | |
88 | { | |
89 | if (c->istate > CHAN_INPUT_CLOSED || next > CHAN_INPUT_CLOSED) | |
90 | fatal("chan_set_istate: bad state %d -> %d", c->istate, next); | |
d7ac5f18 | 91 | debug2("channel %d: input %s -> %s", c->self, istates[c->istate], |
368e9dfc | 92 | istates[next]); |
93 | c->istate = next; | |
94 | } | |
95 | static void | |
96 | chan_set_ostate(Channel *c, u_int next) | |
97 | { | |
98 | if (c->ostate > CHAN_OUTPUT_CLOSED || next > CHAN_OUTPUT_CLOSED) | |
99 | fatal("chan_set_ostate: bad state %d -> %d", c->ostate, next); | |
d7ac5f18 | 100 | debug2("channel %d: output %s -> %s", c->self, ostates[c->ostate], |
368e9dfc | 101 | ostates[next]); |
102 | c->ostate = next; | |
103 | } | |
104 | ||
7e7327a1 | 105 | /* |
106 | * SSH1 specific implementation of event functions | |
107 | */ | |
108 | ||
109 | static void | |
110 | chan_rcvd_oclose1(Channel *c) | |
5260325f | 111 | { |
d7ac5f18 | 112 | debug2("channel %d: rcvd oclose", c->self); |
5260325f | 113 | switch (c->istate) { |
8efc0c15 | 114 | case CHAN_INPUT_WAIT_OCLOSE: |
368e9dfc | 115 | chan_set_istate(c, CHAN_INPUT_CLOSED); |
8efc0c15 | 116 | break; |
117 | case CHAN_INPUT_OPEN: | |
8efc0c15 | 118 | chan_shutdown_read(c); |
7e7327a1 | 119 | chan_send_ieof1(c); |
368e9dfc | 120 | chan_set_istate(c, CHAN_INPUT_CLOSED); |
48e671d5 | 121 | break; |
122 | case CHAN_INPUT_WAIT_DRAIN: | |
123 | /* both local read_failed and remote write_failed */ | |
7e7327a1 | 124 | chan_send_ieof1(c); |
368e9dfc | 125 | chan_set_istate(c, CHAN_INPUT_CLOSED); |
8efc0c15 | 126 | break; |
127 | default: | |
f048f3e2 | 128 | error("channel %d: protocol error: rcvd_oclose for istate %d", |
7e7327a1 | 129 | c->self, c->istate); |
48e671d5 | 130 | return; |
8efc0c15 | 131 | } |
132 | } | |
70bef40e | 133 | void |
134 | chan_read_failed(Channel *c) | |
5260325f | 135 | { |
d7ac5f18 | 136 | debug2("channel %d: read failed", c->self); |
5260325f | 137 | switch (c->istate) { |
8efc0c15 | 138 | case CHAN_INPUT_OPEN: |
8efc0c15 | 139 | chan_shutdown_read(c); |
368e9dfc | 140 | chan_set_istate(c, CHAN_INPUT_WAIT_DRAIN); |
8efc0c15 | 141 | break; |
142 | default: | |
f048f3e2 | 143 | error("channel %d: chan_read_failed for istate %d", |
7e7327a1 | 144 | c->self, c->istate); |
8efc0c15 | 145 | break; |
146 | } | |
147 | } | |
70bef40e | 148 | void |
149 | chan_ibuf_empty(Channel *c) | |
5260325f | 150 | { |
d7ac5f18 | 151 | debug2("channel %d: ibuf empty", c->self); |
5260325f | 152 | if (buffer_len(&c->input)) { |
f048f3e2 | 153 | error("channel %d: chan_ibuf_empty for non empty buffer", |
7e7327a1 | 154 | c->self); |
8efc0c15 | 155 | return; |
156 | } | |
5260325f | 157 | switch (c->istate) { |
8efc0c15 | 158 | case CHAN_INPUT_WAIT_DRAIN: |
3057c23b | 159 | if (compat20) { |
160 | if (!(c->flags & CHAN_CLOSE_SENT)) | |
161 | chan_send_eof2(c); | |
162 | chan_set_istate(c, CHAN_INPUT_CLOSED); | |
163 | } else { | |
164 | chan_send_ieof1(c); | |
165 | chan_set_istate(c, CHAN_INPUT_WAIT_OCLOSE); | |
166 | } | |
8efc0c15 | 167 | break; |
168 | default: | |
f048f3e2 | 169 | error("channel %d: chan_ibuf_empty for istate %d", |
7e7327a1 | 170 | c->self, c->istate); |
8efc0c15 | 171 | break; |
172 | } | |
173 | } | |
7e7327a1 | 174 | static void |
175 | chan_rcvd_ieof1(Channel *c) | |
5260325f | 176 | { |
d7ac5f18 | 177 | debug2("channel %d: rcvd ieof", c->self); |
5260325f | 178 | switch (c->ostate) { |
8efc0c15 | 179 | case CHAN_OUTPUT_OPEN: |
368e9dfc | 180 | chan_set_ostate(c, CHAN_OUTPUT_WAIT_DRAIN); |
8efc0c15 | 181 | break; |
182 | case CHAN_OUTPUT_WAIT_IEOF: | |
368e9dfc | 183 | chan_set_ostate(c, CHAN_OUTPUT_CLOSED); |
8efc0c15 | 184 | break; |
185 | default: | |
f048f3e2 | 186 | error("channel %d: protocol error: rcvd_ieof for ostate %d", |
7e7327a1 | 187 | c->self, c->ostate); |
8efc0c15 | 188 | break; |
189 | } | |
190 | } | |
7e7327a1 | 191 | static void |
192 | chan_write_failed1(Channel *c) | |
5260325f | 193 | { |
d7ac5f18 | 194 | debug2("channel %d: write failed", c->self); |
5260325f | 195 | switch (c->ostate) { |
8efc0c15 | 196 | case CHAN_OUTPUT_OPEN: |
1e5e896c | 197 | chan_shutdown_write(c); |
7e7327a1 | 198 | chan_send_oclose1(c); |
368e9dfc | 199 | chan_set_ostate(c, CHAN_OUTPUT_WAIT_IEOF); |
8efc0c15 | 200 | break; |
201 | case CHAN_OUTPUT_WAIT_DRAIN: | |
1e5e896c | 202 | chan_shutdown_write(c); |
7e7327a1 | 203 | chan_send_oclose1(c); |
368e9dfc | 204 | chan_set_ostate(c, CHAN_OUTPUT_CLOSED); |
8efc0c15 | 205 | break; |
206 | default: | |
f048f3e2 | 207 | error("channel %d: chan_write_failed for ostate %d", |
7e7327a1 | 208 | c->self, c->ostate); |
8efc0c15 | 209 | break; |
210 | } | |
211 | } | |
70bef40e | 212 | void |
213 | chan_obuf_empty(Channel *c) | |
5260325f | 214 | { |
d7ac5f18 | 215 | debug2("channel %d: obuf empty", c->self); |
5260325f | 216 | if (buffer_len(&c->output)) { |
f048f3e2 | 217 | error("channel %d: chan_obuf_empty for non empty buffer", |
7e7327a1 | 218 | c->self); |
8efc0c15 | 219 | return; |
220 | } | |
5260325f | 221 | switch (c->ostate) { |
8efc0c15 | 222 | case CHAN_OUTPUT_WAIT_DRAIN: |
1e5e896c | 223 | chan_shutdown_write(c); |
3057c23b | 224 | if (!compat20) |
225 | chan_send_oclose1(c); | |
368e9dfc | 226 | chan_set_ostate(c, CHAN_OUTPUT_CLOSED); |
8efc0c15 | 227 | break; |
228 | default: | |
f048f3e2 | 229 | error("channel %d: internal error: obuf_empty for ostate %d", |
7e7327a1 | 230 | c->self, c->ostate); |
8efc0c15 | 231 | break; |
232 | } | |
233 | } | |
8efc0c15 | 234 | static void |
7e7327a1 | 235 | chan_send_ieof1(Channel *c) |
5260325f | 236 | { |
d7ac5f18 | 237 | debug2("channel %d: send ieof", c->self); |
5260325f | 238 | switch (c->istate) { |
8efc0c15 | 239 | case CHAN_INPUT_OPEN: |
240 | case CHAN_INPUT_WAIT_DRAIN: | |
241 | packet_start(SSH_MSG_CHANNEL_INPUT_EOF); | |
242 | packet_put_int(c->remote_id); | |
243 | packet_send(); | |
244 | break; | |
245 | default: | |
f048f3e2 | 246 | error("channel %d: cannot send ieof for istate %d", |
7e7327a1 | 247 | c->self, c->istate); |
8efc0c15 | 248 | break; |
249 | } | |
250 | } | |
251 | static void | |
7e7327a1 | 252 | chan_send_oclose1(Channel *c) |
5260325f | 253 | { |
d7ac5f18 | 254 | debug2("channel %d: send oclose", c->self); |
5260325f | 255 | switch (c->ostate) { |
8efc0c15 | 256 | case CHAN_OUTPUT_OPEN: |
257 | case CHAN_OUTPUT_WAIT_DRAIN: | |
9c50edcf | 258 | buffer_clear(&c->output); |
8efc0c15 | 259 | packet_start(SSH_MSG_CHANNEL_OUTPUT_CLOSE); |
260 | packet_put_int(c->remote_id); | |
261 | packet_send(); | |
262 | break; | |
263 | default: | |
f048f3e2 | 264 | error("channel %d: cannot send oclose for ostate %d", |
184eed6a | 265 | c->self, c->ostate); |
8efc0c15 | 266 | break; |
267 | } | |
268 | } | |
5260325f | 269 | |
7e7327a1 | 270 | /* |
271 | * the same for SSH2 | |
272 | */ | |
8efc0c15 | 273 | static void |
668a91b7 | 274 | chan_rcvd_close2(Channel *c) |
5260325f | 275 | { |
d7ac5f18 | 276 | debug2("channel %d: rcvd close", c->self); |
7e7327a1 | 277 | if (c->flags & CHAN_CLOSE_RCVD) |
278 | error("channel %d: protocol error: close rcvd twice", c->self); | |
279 | c->flags |= CHAN_CLOSE_RCVD; | |
280 | if (c->type == SSH_CHANNEL_LARVAL) { | |
281 | /* tear down larval channels immediately */ | |
368e9dfc | 282 | chan_set_ostate(c, CHAN_OUTPUT_CLOSED); |
283 | chan_set_istate(c, CHAN_INPUT_CLOSED); | |
7e7327a1 | 284 | return; |
285 | } | |
286 | switch (c->ostate) { | |
287 | case CHAN_OUTPUT_OPEN: | |
f048f3e2 | 288 | /* |
289 | * wait until a data from the channel is consumed if a CLOSE | |
290 | * is received | |
291 | */ | |
368e9dfc | 292 | chan_set_ostate(c, CHAN_OUTPUT_WAIT_DRAIN); |
7e7327a1 | 293 | break; |
294 | } | |
295 | switch (c->istate) { | |
296 | case CHAN_INPUT_OPEN: | |
7e7327a1 | 297 | chan_shutdown_read(c); |
668a91b7 | 298 | chan_set_istate(c, CHAN_INPUT_CLOSED); |
7e7327a1 | 299 | break; |
300 | case CHAN_INPUT_WAIT_DRAIN: | |
7e7327a1 | 301 | chan_send_eof2(c); |
668a91b7 | 302 | chan_set_istate(c, CHAN_INPUT_CLOSED); |
7e7327a1 | 303 | break; |
304 | } | |
8efc0c15 | 305 | } |
306 | static void | |
668a91b7 | 307 | chan_rcvd_eof2(Channel *c) |
5260325f | 308 | { |
d7ac5f18 | 309 | debug2("channel %d: rcvd eof", c->self); |
d2296ed7 | 310 | c->flags |= CHAN_EOF_RCVD; |
368e9dfc | 311 | if (c->ostate == CHAN_OUTPUT_OPEN) |
312 | chan_set_ostate(c, CHAN_OUTPUT_WAIT_DRAIN); | |
8efc0c15 | 313 | } |
7e7327a1 | 314 | static void |
315 | chan_write_failed2(Channel *c) | |
316 | { | |
d7ac5f18 | 317 | debug2("channel %d: write failed", c->self); |
7e7327a1 | 318 | switch (c->ostate) { |
319 | case CHAN_OUTPUT_OPEN: | |
7e7327a1 | 320 | case CHAN_OUTPUT_WAIT_DRAIN: |
7e7327a1 | 321 | chan_shutdown_write(c); |
368e9dfc | 322 | chan_set_ostate(c, CHAN_OUTPUT_CLOSED); |
7e7327a1 | 323 | break; |
324 | default: | |
f048f3e2 | 325 | error("channel %d: chan_write_failed for ostate %d", |
7e7327a1 | 326 | c->self, c->ostate); |
327 | break; | |
328 | } | |
329 | } | |
330 | static void | |
7e7327a1 | 331 | chan_send_eof2(Channel *c) |
332 | { | |
d7ac5f18 | 333 | debug2("channel %d: send eof", c->self); |
7e7327a1 | 334 | switch (c->istate) { |
335 | case CHAN_INPUT_WAIT_DRAIN: | |
336 | packet_start(SSH2_MSG_CHANNEL_EOF); | |
337 | packet_put_int(c->remote_id); | |
338 | packet_send(); | |
d2296ed7 | 339 | c->flags |= CHAN_EOF_SENT; |
7e7327a1 | 340 | break; |
341 | default: | |
f048f3e2 | 342 | error("channel %d: cannot send eof for istate %d", |
7e7327a1 | 343 | c->self, c->istate); |
344 | break; | |
345 | } | |
346 | } | |
347 | static void | |
348 | chan_send_close2(Channel *c) | |
349 | { | |
d7ac5f18 | 350 | debug2("channel %d: send close", c->self); |
7e7327a1 | 351 | if (c->ostate != CHAN_OUTPUT_CLOSED || |
352 | c->istate != CHAN_INPUT_CLOSED) { | |
f048f3e2 | 353 | error("channel %d: cannot send close for istate/ostate %d/%d", |
7e7327a1 | 354 | c->self, c->istate, c->ostate); |
355 | } else if (c->flags & CHAN_CLOSE_SENT) { | |
f048f3e2 | 356 | error("channel %d: already sent close", c->self); |
7e7327a1 | 357 | } else { |
358 | packet_start(SSH2_MSG_CHANNEL_CLOSE); | |
359 | packet_put_int(c->remote_id); | |
360 | packet_send(); | |
361 | c->flags |= CHAN_CLOSE_SENT; | |
362 | } | |
363 | } | |
ee55dacf | 364 | |
365 | /* shared */ | |
366 | ||
70bef40e | 367 | void |
368 | chan_rcvd_ieof(Channel *c) | |
369 | { | |
370 | if (compat20) | |
371 | chan_rcvd_eof2(c); | |
372 | else | |
373 | chan_rcvd_ieof1(c); | |
32e7d71f | 374 | if (c->ostate == CHAN_OUTPUT_WAIT_DRAIN && |
7203d6bb | 375 | buffer_len(&c->output) == 0 && |
d2296ed7 | 376 | !CHANNEL_EFD_OUTPUT_ACTIVE(c)) |
32e7d71f | 377 | chan_obuf_empty(c); |
70bef40e | 378 | } |
379 | void | |
380 | chan_rcvd_oclose(Channel *c) | |
381 | { | |
382 | if (compat20) | |
383 | chan_rcvd_close2(c); | |
384 | else | |
385 | chan_rcvd_oclose1(c); | |
386 | } | |
387 | void | |
388 | chan_write_failed(Channel *c) | |
389 | { | |
390 | if (compat20) | |
391 | chan_write_failed2(c); | |
392 | else | |
393 | chan_write_failed1(c); | |
394 | } | |
395 | ||
719fc62f | 396 | void |
397 | chan_mark_dead(Channel *c) | |
398 | { | |
6fd8622b | 399 | c->type = SSH_CHANNEL_ZOMBIE; |
719fc62f | 400 | } |
401 | ||
ee55dacf | 402 | int |
ca75d7de | 403 | chan_is_dead(Channel *c, int do_send) |
5260325f | 404 | { |
6fd8622b | 405 | if (c->type == SSH_CHANNEL_ZOMBIE) { |
d7ac5f18 | 406 | debug2("channel %d: zombie", c->self); |
719fc62f | 407 | return 1; |
6fd8622b | 408 | } |
ee55dacf | 409 | if (c->istate != CHAN_INPUT_CLOSED || c->ostate != CHAN_OUTPUT_CLOSED) |
410 | return 0; | |
411 | if (!compat20) { | |
d7ac5f18 | 412 | debug2("channel %d: is dead", c->self); |
ee55dacf | 413 | return 1; |
414 | } | |
d2296ed7 | 415 | if ((datafellows & SSH_BUG_EXTEOF) && |
416 | c->extended_usage == CHAN_EXTENDED_WRITE && | |
417 | c->efd != -1 && | |
418 | buffer_len(&c->extended) > 0) { | |
875ec275 | 419 | debug2("channel %d: active efd: %d len %d", |
420 | c->self, c->efd, buffer_len(&c->extended)); | |
d2296ed7 | 421 | return 0; |
422 | } | |
423 | if (!(c->flags & CHAN_CLOSE_SENT)) { | |
ca75d7de | 424 | if (do_send) { |
d2296ed7 | 425 | chan_send_close2(c); |
426 | } else { | |
427 | /* channel would be dead if we sent a close */ | |
428 | if (c->flags & CHAN_CLOSE_RCVD) { | |
d7ac5f18 | 429 | debug2("channel %d: almost dead", |
d2296ed7 | 430 | c->self); |
431 | return 1; | |
418e724c | 432 | } |
7e7327a1 | 433 | } |
d2296ed7 | 434 | } |
435 | if ((c->flags & CHAN_CLOSE_SENT) && | |
436 | (c->flags & CHAN_CLOSE_RCVD)) { | |
d7ac5f18 | 437 | debug2("channel %d: is dead", c->self); |
d2296ed7 | 438 | return 1; |
8efc0c15 | 439 | } |
ee55dacf | 440 | return 0; |
8efc0c15 | 441 | } |
7e7327a1 | 442 | |
7e7327a1 | 443 | /* helper */ |
444 | static void | |
445 | chan_shutdown_write(Channel *c) | |
446 | { | |
9c50edcf | 447 | buffer_clear(&c->output); |
7e7327a1 | 448 | if (compat20 && c->type == SSH_CHANNEL_LARVAL) |
449 | return; | |
450 | /* shutdown failure is allowed if write failed already */ | |
d7ac5f18 | 451 | debug2("channel %d: close_write", c->self); |
7e7327a1 | 452 | if (c->sock != -1) { |
453 | if (shutdown(c->sock, SHUT_WR) < 0) | |
d7ac5f18 | 454 | debug2("channel %d: chan_shutdown_write: " |
f048f3e2 | 455 | "shutdown() failed for fd%d: %.100s", |
7e7327a1 | 456 | c->self, c->sock, strerror(errno)); |
457 | } else { | |
489aa2e9 | 458 | if (channel_close_fd(&c->wfd) < 0) |
bbe88b6d | 459 | logit("channel %d: chan_shutdown_write: " |
f048f3e2 | 460 | "close() failed for fd%d: %.100s", |
7e7327a1 | 461 | c->self, c->wfd, strerror(errno)); |
7e7327a1 | 462 | } |
463 | } | |
464 | static void | |
465 | chan_shutdown_read(Channel *c) | |
466 | { | |
467 | if (compat20 && c->type == SSH_CHANNEL_LARVAL) | |
468 | return; | |
d7ac5f18 | 469 | debug2("channel %d: close_read", c->self); |
7e7327a1 | 470 | if (c->sock != -1) { |
2b87da3b | 471 | /* |
47670e77 | 472 | * shutdown(sock, SHUT_READ) may return ENOTCONN if the |
473 | * write side has been closed already. (bug on Linux) | |
f49df8e9 | 474 | * HP-UX may return ENOTCONN also. |
47670e77 | 475 | */ |
476 | if (shutdown(c->sock, SHUT_RD) < 0 | |
f49df8e9 | 477 | && errno != ENOTCONN) |
f048f3e2 | 478 | error("channel %d: chan_shutdown_read: " |
479 | "shutdown() failed for fd%d [i%d o%d]: %.100s", | |
480 | c->self, c->sock, c->istate, c->ostate, | |
1b73841d | 481 | strerror(errno)); |
7e7327a1 | 482 | } else { |
489aa2e9 | 483 | if (channel_close_fd(&c->rfd) < 0) |
bbe88b6d | 484 | logit("channel %d: chan_shutdown_read: " |
f048f3e2 | 485 | "close() failed for fd%d: %.100s", |
7e7327a1 | 486 | c->self, c->rfd, strerror(errno)); |
7e7327a1 | 487 | } |
8efc0c15 | 488 | } |