Commit | Line | Data |
---|---|---|
84004dbf RS |
1 | /* |
2 | Copyright (C) 2010 by Ronnie Sahlberg <ronniesahlberg@gmail.com> | |
3 | ||
4 | This program is free software; you can redistribute it and/or modify | |
5 | it under the terms of the GNU Lesser General Public License as published by | |
6 | the Free Software Foundation; either version 2.1 of the License, or | |
7 | (at your option) any later version. | |
8 | ||
9 | This program is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | GNU Lesser General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public License | |
15 | along with this program; if not, see <http://www.gnu.org/licenses/>. | |
16 | */ | |
a8a1b858 M |
17 | #ifdef WIN32 |
18 | #include "win32_compat.h" | |
19 | #else | |
20 | #include <unistd.h> | |
21 | #include <poll.h> | |
22 | #include <arpa/inet.h> | |
23 | #include <sys/ioctl.h> | |
24 | #include <sys/socket.h> | |
25 | #include <netdb.h> | |
26 | #endif/*WIN32*/ | |
84004dbf | 27 | |
6874f61e RS |
28 | #if defined(WIN32) |
29 | #include <winsock2.h> | |
30 | #include <ws2tcpip.h> | |
31 | #include <basetsd.h> | |
32 | #define ssize_t SSIZE_T | |
33 | #define MSG_DONTWAIT 0 | |
34 | #else | |
35 | #include <unistd.h> | |
36 | #include <poll.h> | |
37 | #include <arpa/inet.h> | |
38 | #include <sys/ioctl.h> | |
39 | #include <sys/socket.h> | |
40 | #include <netdb.h> | |
41 | #endif | |
42 | ||
fc01d2a9 TN |
43 | #ifdef HAVE_CONFIG_H |
44 | #include "config.h" | |
45 | #endif | |
84004dbf | 46 | #include <stdio.h> |
98f5fee8 | 47 | #include <stdlib.h> |
84004dbf | 48 | #include <fcntl.h> |
84004dbf RS |
49 | #include <string.h> |
50 | #include <errno.h> | |
98f5fee8 | 51 | #include <rpc/rpc.h> |
84004dbf | 52 | #include <rpc/xdr.h> |
fc01d2a9 TN |
53 | #ifdef HAVE_SYS_FILIO_H |
54 | #include <sys/filio.h> | |
55 | #endif | |
647d2ea1 RS |
56 | #ifdef HAVE_SYS_SOCKIO_H |
57 | #include <sys/sockio.h> | |
58 | #endif | |
485bc9b9 | 59 | #include <sys/types.h> |
84004dbf RS |
60 | #include "libnfs.h" |
61 | #include "libnfs-raw.h" | |
62 | #include "libnfs-private.h" | |
63 | #include "slist.h" | |
64 | ||
b077fdeb RS |
65 | static int rpc_disconnect_requeue(struct rpc_context *rpc); |
66 | ||
84004dbf RS |
67 | static void set_nonblocking(int fd) |
68 | { | |
99c14c9b | 69 | int v = 0; |
6874f61e | 70 | #if defined(WIN32) |
99c14c9b | 71 | long nonblocking=1; |
72 | v = ioctlsocket(fd, FIONBIO,&nonblocking); | |
6874f61e | 73 | #else |
84004dbf RS |
74 | v = fcntl(fd, F_GETFL, 0); |
75 | fcntl(fd, F_SETFL, v | O_NONBLOCK); | |
a8a1b858 | 76 | #endif //FIXME |
84004dbf RS |
77 | } |
78 | ||
79 | int rpc_get_fd(struct rpc_context *rpc) | |
80 | { | |
81 | return rpc->fd; | |
82 | } | |
83 | ||
84 | int rpc_which_events(struct rpc_context *rpc) | |
85 | { | |
912f7ad5 | 86 | int events = rpc->is_connected ? POLLIN : POLLOUT; |
84004dbf | 87 | |
5911f3e8 RS |
88 | if (rpc->is_udp != 0) { |
89 | /* for udp sockets we only wait for pollin */ | |
90 | return POLLIN; | |
91 | } | |
92 | ||
84004dbf RS |
93 | if (rpc->outqueue) { |
94 | events |= POLLOUT; | |
95 | } | |
96 | return events; | |
97 | } | |
98 | ||
99 | static int rpc_write_to_socket(struct rpc_context *rpc) | |
100 | { | |
101 | ssize_t count; | |
102 | ||
103 | if (rpc == NULL) { | |
84004dbf RS |
104 | return -1; |
105 | } | |
106 | if (rpc->fd == -1) { | |
1896d37b RS |
107 | rpc_set_error(rpc, "trying to write but not connected"); |
108 | return -1; | |
84004dbf RS |
109 | } |
110 | ||
111 | while (rpc->outqueue != NULL) { | |
112 | ssize_t total; | |
113 | ||
114 | total = rpc->outqueue->outdata.size; | |
115 | ||
6874f61e RS |
116 | #if defined(WIN32) |
117 | count = send(rpc->fd, rpc->outqueue->outdata.data + rpc->outqueue->written, total - rpc->outqueue->written, 0); | |
118 | #else | |
84004dbf | 119 | count = write(rpc->fd, rpc->outqueue->outdata.data + rpc->outqueue->written, total - rpc->outqueue->written); |
6874f61e | 120 | #endif |
84004dbf RS |
121 | if (count == -1) { |
122 | if (errno == EAGAIN || errno == EWOULDBLOCK) { | |
84004dbf RS |
123 | return 0; |
124 | } | |
1896d37b RS |
125 | rpc_set_error(rpc, "Error when writing to socket :%s(%d)", strerror(errno), errno); |
126 | return -1; | |
84004dbf RS |
127 | } |
128 | ||
129 | rpc->outqueue->written += count; | |
130 | if (rpc->outqueue->written == total) { | |
131 | struct rpc_pdu *pdu = rpc->outqueue; | |
132 | ||
133 | SLIST_REMOVE(&rpc->outqueue, pdu); | |
134 | SLIST_ADD_END(&rpc->waitpdu, pdu); | |
135 | } | |
136 | } | |
137 | return 0; | |
138 | } | |
139 | ||
140 | static int rpc_read_from_socket(struct rpc_context *rpc) | |
141 | { | |
142 | int available; | |
143 | int size; | |
cdb19ec1 | 144 | int pdu_size; |
84004dbf RS |
145 | ssize_t count; |
146 | ||
6874f61e RS |
147 | #if defined(WIN32) |
148 | if (ioctlsocket(rpc->fd, FIONREAD, &available) != 0) { | |
149 | #else | |
84004dbf | 150 | if (ioctl(rpc->fd, FIONREAD, &available) != 0) { |
6874f61e | 151 | #endif |
84004dbf RS |
152 | rpc_set_error(rpc, "Ioctl FIONREAD returned error : %d. Closing socket.", errno); |
153 | return -1; | |
154 | } | |
a8a1b858 | 155 | |
84004dbf RS |
156 | if (available == 0) { |
157 | rpc_set_error(rpc, "Socket has been closed"); | |
1896d37b | 158 | return -1; |
84004dbf | 159 | } |
cdb19ec1 | 160 | |
0268794f RS |
161 | if (rpc->is_udp) { |
162 | char *buf; | |
163 | socklen_t socklen = sizeof(rpc->udp_src); | |
164 | ||
165 | buf = malloc(available); | |
166 | if (buf == NULL) { | |
167 | rpc_set_error(rpc, "Failed to malloc buffer for recvfrom"); | |
168 | return -1; | |
169 | } | |
170 | count = recvfrom(rpc->fd, buf, available, MSG_DONTWAIT, (struct sockaddr *)&rpc->udp_src, &socklen); | |
171 | if (count < 0) { | |
172 | rpc_set_error(rpc, "Failed recvfrom: %s", strerror(errno)); | |
173 | free(buf); | |
174 | } | |
175 | if (rpc_process_pdu(rpc, buf, count) != 0) { | |
176 | rpc_set_error(rpc, "Invalid/garbage pdu received from server. Ignoring PDU"); | |
177 | free(buf); | |
178 | return -1; | |
179 | } | |
180 | free(buf); | |
181 | return 0; | |
182 | } | |
183 | ||
cdb19ec1 RS |
184 | /* read record marker, 4 bytes at the beginning of every pdu */ |
185 | if (rpc->inbuf == NULL) { | |
186 | rpc->insize = 4; | |
187 | rpc->inbuf = malloc(rpc->insize); | |
188 | if (rpc->inbuf == NULL) { | |
189 | rpc_set_error(rpc, "Failed to allocate buffer for record marker, errno:%d. Closing socket.", errno); | |
190 | return -1; | |
191 | } | |
192 | } | |
193 | if (rpc->inpos < 4) { | |
194 | size = 4 - rpc->inpos; | |
195 | ||
6874f61e RS |
196 | #if defined(WIN32) |
197 | count = recv(rpc->fd, rpc->inbuf + rpc->inpos, size, 0); | |
198 | #else | |
cdb19ec1 | 199 | count = read(rpc->fd, rpc->inbuf + rpc->inpos, size); |
6874f61e | 200 | #endif |
cdb19ec1 RS |
201 | if (count == -1) { |
202 | if (errno == EINTR) { | |
203 | return 0; | |
204 | } | |
205 | rpc_set_error(rpc, "Read from socket failed, errno:%d. Closing socket.", errno); | |
206 | return -1; | |
207 | } | |
208 | available -= count; | |
209 | rpc->inpos += count; | |
210 | } | |
211 | ||
212 | if (available == 0) { | |
213 | return 0; | |
214 | } | |
215 | ||
216 | pdu_size = rpc_get_pdu_size(rpc->inbuf); | |
217 | if (rpc->insize < pdu_size) { | |
218 | unsigned char *buf; | |
219 | ||
220 | buf = malloc(pdu_size); | |
221 | if (buf == NULL) { | |
222 | rpc_set_error(rpc, "Failed to allocate buffer of %d bytes for pdu, errno:%d. Closing socket.", pdu_size, errno); | |
223 | return -1; | |
224 | } | |
225 | memcpy(buf, rpc->inbuf, rpc->insize); | |
226 | free(rpc->inbuf); | |
227 | rpc->inbuf = buf; | |
228 | rpc->insize = rpc_get_pdu_size(rpc->inbuf); | |
84004dbf | 229 | } |
cdb19ec1 RS |
230 | |
231 | size = available; | |
232 | if (size > rpc->insize - rpc->inpos) { | |
233 | size = rpc->insize - rpc->inpos; | |
84004dbf RS |
234 | } |
235 | ||
6874f61e RS |
236 | #if defined(WIN32) |
237 | count = recv(rpc->fd, rpc->inbuf + rpc->inpos, size, 0); | |
238 | #else | |
cdb19ec1 | 239 | count = read(rpc->fd, rpc->inbuf + rpc->inpos, size); |
6874f61e | 240 | #endif |
84004dbf RS |
241 | if (count == -1) { |
242 | if (errno == EINTR) { | |
84004dbf RS |
243 | return 0; |
244 | } | |
245 | rpc_set_error(rpc, "Read from socket failed, errno:%d. Closing socket.", errno); | |
1896d37b | 246 | return -1; |
84004dbf | 247 | } |
cdb19ec1 RS |
248 | available -= count; |
249 | rpc->inpos += count; | |
84004dbf | 250 | |
cdb19ec1 RS |
251 | if (rpc->inpos == rpc->insize) { |
252 | if (rpc_process_pdu(rpc, rpc->inbuf, pdu_size) != 0) { | |
84004dbf | 253 | rpc_set_error(rpc, "Invalid/garbage pdu received from server. Closing socket"); |
1896d37b | 254 | return -1; |
84004dbf | 255 | } |
cdb19ec1 RS |
256 | free(rpc->inbuf); |
257 | rpc->inbuf = NULL; | |
258 | rpc->insize = 0; | |
259 | rpc->inpos = 0; | |
84004dbf | 260 | } |
cdb19ec1 | 261 | |
84004dbf RS |
262 | return 0; |
263 | } | |
264 | ||
265 | ||
266 | ||
267 | int rpc_service(struct rpc_context *rpc, int revents) | |
268 | { | |
269 | if (revents & POLLERR) { | |
a8a1b858 | 270 | char err = 0; |
912f7ad5 RS |
271 | socklen_t err_size = sizeof(err); |
272 | ||
273 | if (getsockopt(rpc->fd, SOL_SOCKET, SO_ERROR, | |
bb4e9ed6 | 274 | (char *)&err, &err_size) != 0 || err != 0) { |
912f7ad5 RS |
275 | if (err == 0) { |
276 | err = errno; | |
277 | } | |
278 | rpc_set_error(rpc, "rpc_service: socket error " | |
279 | "%s(%d).", | |
280 | strerror(err), err); | |
84004dbf | 281 | } else { |
912f7ad5 RS |
282 | rpc_set_error(rpc, "rpc_service: POLLERR, " |
283 | "Unknown socket error."); | |
84004dbf RS |
284 | } |
285 | rpc->connect_cb(rpc, RPC_STATUS_ERROR, rpc->error_string, rpc->connect_data); | |
286 | return -1; | |
287 | } | |
288 | if (revents & POLLHUP) { | |
84004dbf RS |
289 | rpc_set_error(rpc, "Socket failed with POLLHUP"); |
290 | rpc->connect_cb(rpc, RPC_STATUS_ERROR, rpc->error_string, rpc->connect_data); | |
1896d37b | 291 | return -1; |
84004dbf RS |
292 | } |
293 | ||
294 | if (rpc->is_connected == 0 && rpc->fd != -1 && revents&POLLOUT) { | |
912f7ad5 RS |
295 | int err = 0; |
296 | socklen_t err_size = sizeof(err); | |
297 | ||
298 | if (getsockopt(rpc->fd, SOL_SOCKET, SO_ERROR, | |
bb4e9ed6 | 299 | (char *)&err, &err_size) != 0 || err != 0) { |
912f7ad5 RS |
300 | if (err == 0) { |
301 | err = errno; | |
302 | } | |
303 | rpc_set_error(rpc, "rpc_service: socket error " | |
304 | "%s(%d) while connecting.", | |
305 | strerror(err), err); | |
306 | rpc->connect_cb(rpc, RPC_STATUS_ERROR, | |
307 | NULL, rpc->connect_data); | |
308 | return -1; | |
309 | } | |
310 | ||
84004dbf RS |
311 | rpc->is_connected = 1; |
312 | rpc->connect_cb(rpc, RPC_STATUS_SUCCESS, NULL, rpc->connect_data); | |
313 | return 0; | |
314 | } | |
315 | ||
b077fdeb RS |
316 | if (revents & POLLIN) { |
317 | if (rpc_read_from_socket(rpc) != 0) { | |
83aa785d | 318 | rpc_disconnect_requeue(rpc); |
b077fdeb | 319 | return 0; |
84004dbf RS |
320 | } |
321 | } | |
322 | ||
b077fdeb RS |
323 | if (revents & POLLOUT && rpc->outqueue != NULL) { |
324 | if (rpc_write_to_socket(rpc) != 0) { | |
325 | rpc_set_error(rpc, "write to socket failed"); | |
1896d37b | 326 | return -1; |
84004dbf RS |
327 | } |
328 | } | |
329 | ||
330 | return 0; | |
331 | } | |
332 | ||
333 | ||
334 | int rpc_connect_async(struct rpc_context *rpc, const char *server, int port, rpc_cb cb, void *private_data) | |
335 | { | |
336 | struct sockaddr_storage s; | |
337 | struct sockaddr_in *sin = (struct sockaddr_in *)&s; | |
338 | int socksize; | |
339 | ||
340 | if (rpc->fd != -1) { | |
341 | rpc_set_error(rpc, "Trying to connect while already connected"); | |
84004dbf RS |
342 | return -1; |
343 | } | |
344 | ||
070287e5 RS |
345 | if (rpc->is_udp != 0) { |
346 | rpc_set_error(rpc, "Trying to connect on UDP socket"); | |
347 | return -1; | |
348 | } | |
349 | ||
84004dbf RS |
350 | sin->sin_family = AF_INET; |
351 | sin->sin_port = htons(port); | |
352 | if (inet_pton(AF_INET, server, &sin->sin_addr) != 1) { | |
353 | rpc_set_error(rpc, "Not a valid server ip address"); | |
1896d37b | 354 | return -1; |
84004dbf RS |
355 | } |
356 | ||
357 | switch (s.ss_family) { | |
358 | case AF_INET: | |
84004dbf | 359 | socksize = sizeof(struct sockaddr_in); |
f7f931c7 | 360 | #ifdef HAVE_SOCKADDR_LEN |
ea214e45 RS |
361 | sin->sin_len = socksize; |
362 | #endif | |
6874f61e | 363 | rpc->fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); |
84004dbf RS |
364 | break; |
365 | } | |
366 | ||
367 | if (rpc->fd == -1) { | |
368 | rpc_set_error(rpc, "Failed to open socket"); | |
1896d37b | 369 | return -1; |
84004dbf RS |
370 | } |
371 | ||
372 | rpc->connect_cb = cb; | |
373 | rpc->connect_data = private_data; | |
374 | ||
375 | set_nonblocking(rpc->fd); | |
4b0e8df9 | 376 | #if defined(WIN32) |
377 | if (connect(rpc->fd, (struct sockaddr *)&s, socksize) == 0 && GetLastError() != WSAEINPROGRESS ) | |
378 | #else | |
379 | if (connect(rpc->fd, (struct sockaddr *)&s, socksize) != 0 && errno != EINPROGRESS) | |
380 | #endif | |
381 | { | |
84004dbf | 382 | rpc_set_error(rpc, "connect() to server failed"); |
1896d37b | 383 | return -1; |
84004dbf RS |
384 | } |
385 | ||
386 | return 0; | |
387 | } | |
388 | ||
389 | int rpc_disconnect(struct rpc_context *rpc, char *error) | |
390 | { | |
391 | if (rpc->fd != -1) { | |
6874f61e RS |
392 | #if defined(WIN32) |
393 | closesocket(rpc->fd); | |
394 | #else | |
84004dbf | 395 | close(rpc->fd); |
6874f61e | 396 | #endif |
84004dbf RS |
397 | } |
398 | rpc->fd = -1; | |
399 | ||
400 | rpc->is_connected = 0; | |
401 | ||
402 | rpc_error_all_pdus(rpc, error); | |
403 | ||
404 | return 0; | |
405 | } | |
485bc9b9 | 406 | |
b077fdeb RS |
407 | /* disconnect but do not error all PDUs, just move pdus in-flight back to the outqueue */ |
408 | static int rpc_disconnect_requeue(struct rpc_context *rpc) | |
409 | { | |
410 | struct rpc_pdu *pdu; | |
411 | ||
412 | if (rpc->fd != -1) { | |
6874f61e RS |
413 | #if defined(WIN32) |
414 | closesocket(rpc->fd); | |
415 | #else | |
b077fdeb | 416 | close(rpc->fd); |
6874f61e | 417 | #endif |
b077fdeb RS |
418 | } |
419 | rpc->fd = -1; | |
420 | ||
421 | rpc->is_connected = 0; | |
422 | ||
423 | /* socket is closed so we will not get any replies to any commands | |
424 | * in flight. Move them all over from the waitpdu queue back to the out queue | |
425 | */ | |
426 | for (pdu=rpc->waitpdu; pdu; pdu=pdu->next) { | |
427 | SLIST_REMOVE(&rpc->waitpdu, pdu); | |
428 | SLIST_ADD(&rpc->outqueue, pdu); | |
429 | } | |
430 | ||
431 | return 0; | |
432 | } | |
433 | ||
485bc9b9 RS |
434 | |
435 | int rpc_bind_udp(struct rpc_context *rpc, char *addr, int port) | |
436 | { | |
437 | struct addrinfo *ai = NULL; | |
438 | char service[6]; | |
439 | ||
440 | if (rpc->is_udp == 0) { | |
441 | rpc_set_error(rpc, "Cant not bind UDP. Not UDP context"); | |
442 | return -1; | |
443 | } | |
444 | ||
6874f61e | 445 | sprintf(service, "%d", port); |
485bc9b9 RS |
446 | if (getaddrinfo(addr, service, NULL, &ai) != 0) { |
447 | rpc_set_error(rpc, "Invalid address:%s. " | |
448 | "Can not resolv into IPv4/v6 structure."); | |
449 | return -1; | |
450 | } | |
451 | ||
452 | switch(ai->ai_family) { | |
453 | case AF_INET: | |
454 | rpc->fd = socket(ai->ai_family, SOCK_DGRAM, 0); | |
455 | if (rpc->fd == -1) { | |
456 | rpc_set_error(rpc, "Failed to create UDP socket: %s", strerror(errno)); | |
457 | freeaddrinfo(ai); | |
458 | return -1; | |
459 | } | |
460 | ||
461 | if (bind(rpc->fd, (struct sockaddr *)ai->ai_addr, sizeof(struct sockaddr_in)) != 0) { | |
462 | rpc_set_error(rpc, "Failed to bind to UDP socket: %s",strerror(errno)); | |
463 | freeaddrinfo(ai); | |
464 | return -1; | |
465 | } | |
466 | break; | |
467 | default: | |
468 | rpc_set_error(rpc, "Can not handle UPD sockets of family %d yet", ai->ai_family); | |
469 | freeaddrinfo(ai); | |
470 | return -1; | |
471 | } | |
472 | ||
473 | freeaddrinfo(ai); | |
474 | ||
475 | return 0; | |
476 | } | |
477 | ||
5bf60dc6 RS |
478 | int rpc_set_udp_destination(struct rpc_context *rpc, char *addr, int port, int is_broadcast) |
479 | { | |
480 | struct addrinfo *ai = NULL; | |
481 | char service[6]; | |
482 | ||
483 | if (rpc->is_udp == 0) { | |
484 | rpc_set_error(rpc, "Can not set destination sockaddr. Not UDP context"); | |
485 | return -1; | |
486 | } | |
487 | ||
6874f61e | 488 | sprintf(service, "%d", port); |
5bf60dc6 RS |
489 | if (getaddrinfo(addr, service, NULL, &ai) != 0) { |
490 | rpc_set_error(rpc, "Invalid address:%s. " | |
491 | "Can not resolv into IPv4/v6 structure."); | |
492 | return -1; | |
493 | } | |
494 | ||
495 | if (rpc->udp_dest) { | |
496 | free(rpc->udp_dest); | |
497 | rpc->udp_dest = NULL; | |
498 | } | |
499 | rpc->udp_dest = malloc(ai->ai_addrlen); | |
500 | if (rpc->udp_dest == NULL) { | |
501 | rpc_set_error(rpc, "Out of memory. Failed to allocate sockaddr structure"); | |
502 | return -1; | |
503 | } | |
504 | memcpy(rpc->udp_dest, ai->ai_addr, ai->ai_addrlen); | |
505 | freeaddrinfo(ai); | |
506 | ||
507 | rpc->is_broadcast = is_broadcast; | |
bb4e9ed6 | 508 | setsockopt(rpc->fd, SOL_SOCKET, SO_BROADCAST, (char *)&is_broadcast, sizeof(is_broadcast)); |
5bf60dc6 RS |
509 | |
510 | return 0; | |
511 | } | |
c481da67 RS |
512 | |
513 | struct sockaddr *rpc_get_recv_sockaddr(struct rpc_context *rpc) | |
514 | { | |
515 | return (struct sockaddr *)&rpc->udp_src; | |
516 | } | |
83aa785d RS |
517 | |
518 | int rpc_queue_length(struct rpc_context *rpc) | |
519 | { | |
520 | int i=0; | |
521 | struct rpc_pdu *pdu; | |
522 | ||
523 | for(pdu = rpc->outqueue; pdu; pdu = pdu->next) { | |
524 | i++; | |
525 | } | |
526 | for(pdu = rpc->waitpdu; pdu; pdu = pdu->next) { | |
527 | i++; | |
528 | } | |
529 | return i; | |
530 | } |