Commit | Line | Data |
---|---|---|
7c1b4daa MP |
1 | /* -*- c-file-style: "linux" -*- |
2 | ||
eecd22ff | 3 | Copyright (C) 1992-2001 by Andrew Tridgell <tridge@samba.org> |
7d91d5a6 | 4 | Copyright (C) 2001 by Martin Pool <mbp@samba.org> |
bc2e93eb AT |
5 | |
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | */ | |
20 | ||
21 | /* | |
22 | socket functions used in rsync | |
23 | ||
24 | */ | |
25 | ||
f0fca04e AT |
26 | #include "rsync.h" |
27 | ||
4c3b4b25 | 28 | |
660c6fbd MP |
29 | /* Establish a proxy connection on an open socket to a web roxy by |
30 | * using the CONNECT method. */ | |
4c3b4b25 AT |
31 | static int establish_proxy_connection(int fd, char *host, int port) |
32 | { | |
33 | char buffer[1024]; | |
34 | char *cp; | |
35 | ||
8950ac03 | 36 | snprintf(buffer, sizeof(buffer), "CONNECT %s:%d HTTP/1.0\r\n\r\n", host, port); |
4c3b4b25 | 37 | if (write(fd, buffer, strlen(buffer)) != strlen(buffer)) { |
660c6fbd | 38 | rprintf(FERROR, "failed to write to proxy: %s\n", |
4c3b4b25 AT |
39 | strerror(errno)); |
40 | return -1; | |
41 | } | |
42 | ||
43 | for (cp = buffer; cp < &buffer[sizeof(buffer) - 1]; cp++) { | |
44 | if (read(fd, cp, 1) != 1) { | |
660c6fbd MP |
45 | rprintf(FERROR, "failed to read from proxy: %s\n", |
46 | strerror(errno)); | |
4c3b4b25 AT |
47 | return -1; |
48 | } | |
49 | if (*cp == '\n') | |
50 | break; | |
51 | } | |
52 | ||
53 | if (*cp != '\n') | |
54 | cp++; | |
55 | *cp-- = '\0'; | |
56 | if (*cp == '\r') | |
57 | *cp = '\0'; | |
58 | if (strncmp(buffer, "HTTP/", 5) != 0) { | |
59 | rprintf(FERROR, "bad response from proxy - %s\n", | |
60 | buffer); | |
61 | return -1; | |
62 | } | |
63 | for (cp = &buffer[5]; isdigit(*cp) || (*cp == '.'); cp++) | |
64 | ; | |
65 | while (*cp == ' ') | |
66 | cp++; | |
67 | if (*cp != '2') { | |
68 | rprintf(FERROR, "bad response from proxy - %s\n", | |
69 | buffer); | |
70 | return -1; | |
71 | } | |
72 | /* throw away the rest of the HTTP header */ | |
73 | while (1) { | |
74 | for (cp = buffer; cp < &buffer[sizeof(buffer) - 1]; | |
75 | cp++) { | |
76 | if (read(fd, cp, 1) != 1) { | |
660c6fbd MP |
77 | rprintf(FERROR, "failed to read from proxy: %s\n", |
78 | strerror(errno)); | |
4c3b4b25 AT |
79 | return -1; |
80 | } | |
81 | if (*cp == '\n') | |
82 | break; | |
83 | } | |
84 | if ((cp > buffer) && (*cp == '\n')) | |
85 | cp--; | |
86 | if ((cp == buffer) && ((*cp == '\n') || (*cp == '\r'))) | |
87 | break; | |
88 | } | |
89 | return 0; | |
90 | } | |
91 | ||
92 | ||
eecd22ff | 93 | |
f0fca04e | 94 | /* open a socket to a tcp remote host with the specified port |
4c3b4b25 AT |
95 | based on code from Warren |
96 | proxy support by Stephen Rothwell */ | |
eecd22ff MP |
97 | static int open_socket_out (char *host, |
98 | int port, | |
99 | struct in_addr *address) | |
bc2e93eb | 100 | { |
f0fca04e AT |
101 | int type = SOCK_STREAM; |
102 | struct sockaddr_in sock_out; | |
e30f0657 | 103 | struct sockaddr_in sock; |
f0fca04e AT |
104 | int res; |
105 | struct hostent *hp; | |
4c3b4b25 AT |
106 | char *h; |
107 | unsigned p; | |
108 | int proxied = 0; | |
109 | char buffer[1024]; | |
110 | char *cp; | |
111 | ||
660c6fbd MP |
112 | /* if we have a RSYNC_PROXY env variable then redirect our |
113 | * connetcion via a web proxy at the given address. The format | |
114 | * is hostname:port */ | |
4c3b4b25 AT |
115 | h = getenv("RSYNC_PROXY"); |
116 | proxied = (h != NULL) && (*h != '\0'); | |
117 | ||
118 | if (proxied) { | |
119 | strlcpy(buffer, h, sizeof(buffer)); | |
120 | cp = strchr(buffer, ':'); | |
121 | if (cp == NULL) { | |
660c6fbd MP |
122 | rprintf(FERROR, |
123 | "invalid proxy specification: should be HOST:PORT\n"); | |
4c3b4b25 AT |
124 | return -1; |
125 | } | |
126 | *cp++ = '\0'; | |
127 | p = atoi(cp); | |
128 | h = buffer; | |
129 | } else { | |
130 | h = host; | |
131 | p = port; | |
132 | } | |
f0fca04e AT |
133 | |
134 | res = socket(PF_INET, type, 0); | |
135 | if (res == -1) { | |
136 | return -1; | |
137 | } | |
138 | ||
4c3b4b25 | 139 | hp = gethostbyname(h); |
f0fca04e | 140 | if (!hp) { |
7d91d5a6 | 141 | rprintf(FERROR,"unknown host: \"%s\"\n", h); |
4c3b4b25 | 142 | close(res); |
f0fca04e AT |
143 | return -1; |
144 | } | |
145 | ||
146 | memcpy(&sock_out.sin_addr, hp->h_addr, hp->h_length); | |
4c3b4b25 | 147 | sock_out.sin_port = htons(p); |
f0fca04e AT |
148 | sock_out.sin_family = PF_INET; |
149 | ||
e30f0657 AT |
150 | if (address) { |
151 | sock.sin_addr = *address; | |
152 | sock.sin_port = 0; | |
153 | sock.sin_family = hp->h_addrtype; | |
154 | bind(res, (struct sockaddr * ) &sock,sizeof(sock)); | |
155 | } | |
156 | ||
f0fca04e | 157 | if (connect(res,(struct sockaddr *)&sock_out,sizeof(sock_out))) { |
eecd22ff MP |
158 | rprintf (FERROR, RSYNC_NAME ": failed to connect to host %s: %s\n", |
159 | h, strerror(errno)); | |
4c3b4b25 AT |
160 | close(res); |
161 | return -1; | |
162 | } | |
163 | ||
164 | if (proxied && establish_proxy_connection(res, host, port) != 0) { | |
f0fca04e | 165 | close(res); |
f0fca04e AT |
166 | return -1; |
167 | } | |
168 | ||
169 | return res; | |
170 | } | |
171 | ||
172 | ||
eecd22ff MP |
173 | /** |
174 | * Open an outgoing socket, but allow for it to be intercepted by | |
175 | * $RSYNC_CONNECT_PROG, which will execute a program across a TCP | |
176 | * socketpair rather than really opening a socket. | |
177 | * | |
178 | * We use this primarily in testing to detect TCP flow bugs, but not | |
179 | * cause security problems by really opening remote connections. | |
180 | * | |
181 | * This is based on the Samba LIBSMB_PROG feature. | |
182 | **/ | |
183 | int open_socket_out_wrapped (char *host, | |
184 | int port, | |
185 | struct in_addr *address) | |
186 | { | |
187 | char *prog; | |
188 | ||
189 | if ((prog = getenv ("RSYNC_CONNECT_PROG")) != NULL) | |
190 | return sock_exec (prog); | |
191 | else | |
192 | return open_socket_out (host, port, address); | |
193 | } | |
194 | ||
195 | ||
196 | ||
f0fca04e AT |
197 | /**************************************************************************** |
198 | open a socket of the specified type, port and address for incoming data | |
199 | ****************************************************************************/ | |
5c9730a4 | 200 | static int open_socket_in(int type, int port, struct in_addr *address) |
f0fca04e | 201 | { |
f0fca04e | 202 | struct sockaddr_in sock; |
f0fca04e AT |
203 | int res; |
204 | int one=1; | |
205 | ||
f5780433 | 206 | memset((char *)&sock,0,sizeof(sock)); |
f0fca04e | 207 | sock.sin_port = htons(port); |
376acbfa | 208 | sock.sin_family = AF_INET; |
5c9730a4 AT |
209 | if (address) { |
210 | sock.sin_addr = *address; | |
211 | } else { | |
212 | sock.sin_addr.s_addr = INADDR_ANY; | |
213 | } | |
376acbfa | 214 | res = socket(AF_INET, type, 0); |
f0fca04e | 215 | if (res == -1) { |
eecd22ff | 216 | rprintf(FERROR, RSYNC_NAME ": socket failed: %s\n", |
660c6fbd | 217 | strerror(errno)); |
f0fca04e AT |
218 | return -1; |
219 | } | |
220 | ||
221 | setsockopt(res,SOL_SOCKET,SO_REUSEADDR,(char *)&one,sizeof(one)); | |
222 | ||
223 | /* now we've got a socket - we need to bind it */ | |
224 | if (bind(res, (struct sockaddr * ) &sock,sizeof(sock)) == -1) { | |
660c6fbd MP |
225 | rprintf(FERROR,"bind failed on port %d: %s\n", port, |
226 | strerror(errno)); | |
4d66e00a MP |
227 | if (errno == EACCES && port < 1024) { |
228 | rprintf(FERROR, "Note: you must be root to bind " | |
229 | "to low-numbered ports"); | |
230 | } | |
f0fca04e AT |
231 | close(res); |
232 | return -1; | |
233 | } | |
234 | ||
235 | return res; | |
236 | } | |
237 | ||
238 | ||
7c1b4daa MP |
239 | /* |
240 | * Determine if a file descriptor is in fact a socket | |
241 | */ | |
f0fca04e AT |
242 | int is_a_socket(int fd) |
243 | { | |
ac2a1a44 MP |
244 | int v; |
245 | socklen_t l; | |
3eb38818 | 246 | l = sizeof(int); |
7c1b4daa MP |
247 | |
248 | /* Parameters to getsockopt, setsockopt etc are very | |
249 | * unstandardized across platforms, so don't be surprised if | |
ac2a1a44 MP |
250 | * there are compiler warnings on e.g. SCO OpenSwerver or AIX. |
251 | * It seems they all eventually get the right idea. | |
7c1b4daa MP |
252 | * |
253 | * Debian says: ``The fifth argument of getsockopt and | |
254 | * setsockopt is in reality an int [*] (and this is what BSD | |
255 | * 4.* and libc4 and libc5 have). Some POSIX confusion | |
256 | * resulted in the present socklen_t. The draft standard has | |
257 | * not been adopted yet, but glibc2 already follows it and | |
258 | * also has socklen_t [*]. See also accept(2).'' | |
259 | * | |
260 | * We now return to your regularly scheduled programming. */ | |
3eb38818 | 261 | return(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&v, &l) == 0); |
f0fca04e AT |
262 | } |
263 | ||
264 | ||
8ef4ffd6 | 265 | void start_accept_loop(int port, int (*fn)(int )) |
f0fca04e AT |
266 | { |
267 | int s; | |
5c9730a4 | 268 | extern struct in_addr socket_address; |
f0fca04e | 269 | |
f0fca04e | 270 | /* open an incoming socket */ |
5c9730a4 | 271 | s = open_socket_in(SOCK_STREAM, port, &socket_address); |
f0fca04e | 272 | if (s == -1) |
65417579 | 273 | exit_cleanup(RERR_SOCKETIO); |
f0fca04e AT |
274 | |
275 | /* ready to listen */ | |
276 | if (listen(s, 5) == -1) { | |
277 | close(s); | |
65417579 | 278 | exit_cleanup(RERR_SOCKETIO); |
f0fca04e AT |
279 | } |
280 | ||
281 | ||
282 | /* now accept incoming connections - forking a new process | |
283 | for each incoming connection */ | |
284 | while (1) { | |
285 | fd_set fds; | |
286 | int fd; | |
287 | struct sockaddr addr; | |
546434f8 | 288 | socklen_t in_addrlen = sizeof(addr); |
f0fca04e | 289 | |
15b84e14 DD |
290 | /* close log file before the potentially very long select so |
291 | file can be trimmed by another process instead of growing | |
292 | forever */ | |
293 | log_close(); | |
45a83540 | 294 | |
f0fca04e AT |
295 | FD_ZERO(&fds); |
296 | FD_SET(s, &fds); | |
297 | ||
298 | if (select(s+1, &fds, NULL, NULL, NULL) != 1) { | |
299 | continue; | |
300 | } | |
301 | ||
302 | if(!FD_ISSET(s, &fds)) continue; | |
303 | ||
7c1b4daa | 304 | /* See note above prototypes. */ |
546434f8 | 305 | fd = accept(s,&addr, &in_addrlen); |
f0fca04e AT |
306 | |
307 | if (fd == -1) continue; | |
308 | ||
31f440e6 AT |
309 | signal(SIGCHLD, SIG_IGN); |
310 | ||
311 | /* we shouldn't have any children left hanging around | |
312 | but I have had reports that on Digital Unix zombies | |
313 | are produced, so this ensures that they are reaped */ | |
314 | #ifdef WNOHANG | |
0503f060 | 315 | while (waitpid(-1, NULL, WNOHANG) > 0); |
31f440e6 AT |
316 | #endif |
317 | ||
f0fca04e AT |
318 | if (fork()==0) { |
319 | close(s); | |
320 | ||
15b84e14 DD |
321 | /* open log file in child before possibly giving |
322 | up privileges */ | |
323 | log_open(); | |
324 | ||
f0fca04e AT |
325 | _exit(fn(fd)); |
326 | } | |
327 | ||
328 | close(fd); | |
329 | } | |
f0fca04e AT |
330 | } |
331 | ||
332 | ||
333 | enum SOCK_OPT_TYPES {OPT_BOOL,OPT_INT,OPT_ON}; | |
334 | ||
335 | struct | |
336 | { | |
337 | char *name; | |
338 | int level; | |
339 | int option; | |
340 | int value; | |
341 | int opttype; | |
342 | } socket_options[] = { | |
343 | {"SO_KEEPALIVE", SOL_SOCKET, SO_KEEPALIVE, 0, OPT_BOOL}, | |
344 | {"SO_REUSEADDR", SOL_SOCKET, SO_REUSEADDR, 0, OPT_BOOL}, | |
345 | {"SO_BROADCAST", SOL_SOCKET, SO_BROADCAST, 0, OPT_BOOL}, | |
346 | #ifdef TCP_NODELAY | |
347 | {"TCP_NODELAY", IPPROTO_TCP, TCP_NODELAY, 0, OPT_BOOL}, | |
348 | #endif | |
349 | #ifdef IPTOS_LOWDELAY | |
350 | {"IPTOS_LOWDELAY", IPPROTO_IP, IP_TOS, IPTOS_LOWDELAY, OPT_ON}, | |
351 | #endif | |
352 | #ifdef IPTOS_THROUGHPUT | |
353 | {"IPTOS_THROUGHPUT", IPPROTO_IP, IP_TOS, IPTOS_THROUGHPUT, OPT_ON}, | |
354 | #endif | |
355 | #ifdef SO_SNDBUF | |
356 | {"SO_SNDBUF", SOL_SOCKET, SO_SNDBUF, 0, OPT_INT}, | |
357 | #endif | |
358 | #ifdef SO_RCVBUF | |
359 | {"SO_RCVBUF", SOL_SOCKET, SO_RCVBUF, 0, OPT_INT}, | |
360 | #endif | |
361 | #ifdef SO_SNDLOWAT | |
362 | {"SO_SNDLOWAT", SOL_SOCKET, SO_SNDLOWAT, 0, OPT_INT}, | |
363 | #endif | |
364 | #ifdef SO_RCVLOWAT | |
365 | {"SO_RCVLOWAT", SOL_SOCKET, SO_RCVLOWAT, 0, OPT_INT}, | |
366 | #endif | |
367 | #ifdef SO_SNDTIMEO | |
368 | {"SO_SNDTIMEO", SOL_SOCKET, SO_SNDTIMEO, 0, OPT_INT}, | |
369 | #endif | |
370 | #ifdef SO_RCVTIMEO | |
371 | {"SO_RCVTIMEO", SOL_SOCKET, SO_RCVTIMEO, 0, OPT_INT}, | |
372 | #endif | |
373 | {NULL,0,0,0,0}}; | |
374 | ||
375 | ||
376 | ||
377 | /**************************************************************************** | |
378 | set user socket options | |
379 | ****************************************************************************/ | |
380 | void set_socket_options(int fd, char *options) | |
381 | { | |
382 | char *tok; | |
a6801c39 AT |
383 | if (!options || !*options) return; |
384 | ||
f0fca04e AT |
385 | options = strdup(options); |
386 | ||
387 | if (!options) out_of_memory("set_socket_options"); | |
388 | ||
389 | for (tok=strtok(options, " \t,"); tok; tok=strtok(NULL," \t,")) { | |
390 | int ret=0,i; | |
391 | int value = 1; | |
392 | char *p; | |
393 | int got_value = 0; | |
394 | ||
395 | if ((p = strchr(tok,'='))) { | |
396 | *p = 0; | |
397 | value = atoi(p+1); | |
398 | got_value = 1; | |
399 | } | |
400 | ||
401 | for (i=0;socket_options[i].name;i++) | |
402 | if (strcmp(socket_options[i].name,tok)==0) | |
403 | break; | |
404 | ||
405 | if (!socket_options[i].name) { | |
406 | rprintf(FERROR,"Unknown socket option %s\n",tok); | |
407 | continue; | |
408 | } | |
409 | ||
410 | switch (socket_options[i].opttype) { | |
411 | case OPT_BOOL: | |
412 | case OPT_INT: | |
413 | ret = setsockopt(fd,socket_options[i].level, | |
414 | socket_options[i].option,(char *)&value,sizeof(int)); | |
415 | break; | |
416 | ||
417 | case OPT_ON: | |
418 | if (got_value) | |
419 | rprintf(FERROR,"syntax error - %s does not take a value\n",tok); | |
420 | ||
421 | { | |
422 | int on = socket_options[i].value; | |
423 | ret = setsockopt(fd,socket_options[i].level, | |
424 | socket_options[i].option,(char *)&on,sizeof(int)); | |
425 | } | |
426 | break; | |
427 | } | |
428 | ||
429 | if (ret != 0) | |
660c6fbd MP |
430 | rprintf(FERROR, "failed to set socket option %s: %s\n", tok, |
431 | strerror(errno)); | |
f0fca04e AT |
432 | } |
433 | ||
434 | free(options); | |
435 | } | |
436 | ||
437 | /**************************************************************************** | |
438 | become a daemon, discarding the controlling terminal | |
439 | ****************************************************************************/ | |
440 | void become_daemon(void) | |
441 | { | |
b11ed3b1 AT |
442 | int i; |
443 | ||
c46ded46 | 444 | if (fork()) { |
f0fca04e | 445 | _exit(0); |
c46ded46 | 446 | } |
f0fca04e AT |
447 | |
448 | /* detach from the terminal */ | |
449 | #ifdef HAVE_SETSID | |
450 | setsid(); | |
451 | #else | |
452 | #ifdef TIOCNOTTY | |
c46ded46 AT |
453 | i = open("/dev/tty", O_RDWR); |
454 | if (i >= 0) { | |
455 | ioctl(i, (int) TIOCNOTTY, (char *)0); | |
456 | close(i); | |
f0fca04e AT |
457 | } |
458 | #endif /* TIOCNOTTY */ | |
459 | #endif | |
b11ed3b1 AT |
460 | /* make sure that stdin, stdout an stderr don't stuff things |
461 | up (library functions, for example) */ | |
462 | for (i=0;i<3;i++) { | |
463 | close(i); | |
464 | open("/dev/null", O_RDWR); | |
465 | } | |
bc2e93eb | 466 | } |
ff8b29b8 AT |
467 | |
468 | /******************************************************************* | |
469 | return the IP addr of the client as a string | |
470 | ******************************************************************/ | |
471 | char *client_addr(int fd) | |
472 | { | |
473 | struct sockaddr sa; | |
474 | struct sockaddr_in *sockin = (struct sockaddr_in *) (&sa); | |
c1f62a57 | 475 | socklen_t length = sizeof(sa); |
ff8b29b8 | 476 | static char addr_buf[100]; |
11a5a3c7 AT |
477 | static int initialised; |
478 | ||
479 | if (initialised) return addr_buf; | |
480 | ||
481 | initialised = 1; | |
ff8b29b8 AT |
482 | |
483 | if (getpeername(fd, &sa, &length)) { | |
65417579 | 484 | exit_cleanup(RERR_SOCKETIO); |
ff8b29b8 | 485 | } |
11a5a3c7 | 486 | |
37f9805d | 487 | strlcpy(addr_buf,(char *)inet_ntoa(sockin->sin_addr), sizeof(addr_buf)); |
ff8b29b8 AT |
488 | return addr_buf; |
489 | } | |
490 | ||
491 | ||
492 | /******************************************************************* | |
493 | return the DNS name of the client | |
494 | ******************************************************************/ | |
495 | char *client_name(int fd) | |
496 | { | |
497 | struct sockaddr sa; | |
498 | struct sockaddr_in *sockin = (struct sockaddr_in *) (&sa); | |
546434f8 | 499 | socklen_t length = sizeof(sa); |
ff8b29b8 AT |
500 | static char name_buf[100]; |
501 | struct hostent *hp; | |
de5fb374 AT |
502 | char **p; |
503 | char *def = "UNKNOWN"; | |
11a5a3c7 AT |
504 | static int initialised; |
505 | ||
506 | if (initialised) return name_buf; | |
507 | ||
508 | initialised = 1; | |
ff8b29b8 | 509 | |
de5fb374 | 510 | strcpy(name_buf,def); |
ff8b29b8 AT |
511 | |
512 | if (getpeername(fd, &sa, &length)) { | |
65417579 | 513 | exit_cleanup(RERR_SOCKETIO); |
ff8b29b8 AT |
514 | } |
515 | ||
516 | /* Look up the remote host name. */ | |
517 | if ((hp = gethostbyaddr((char *) &sockin->sin_addr, | |
518 | sizeof(sockin->sin_addr), | |
519 | AF_INET))) { | |
37f9805d | 520 | strlcpy(name_buf,(char *)hp->h_name,sizeof(name_buf)); |
ff8b29b8 AT |
521 | } |
522 | ||
de5fb374 AT |
523 | |
524 | /* do a forward lookup as well to prevent spoofing */ | |
525 | hp = gethostbyname(name_buf); | |
526 | if (!hp) { | |
d58911fb | 527 | strcpy (name_buf,def); |
f8014b86 | 528 | rprintf (FERROR, "reverse name lookup for \"%s\" failed\n", |
d58911fb | 529 | name_buf); |
de5fb374 AT |
530 | } else { |
531 | for (p=hp->h_addr_list;*p;p++) { | |
532 | if (memcmp(*p, &sockin->sin_addr, hp->h_length) == 0) { | |
533 | break; | |
534 | } | |
535 | } | |
536 | if (!*p) { | |
537 | strcpy(name_buf,def); | |
538 | rprintf(FERROR,"reverse name lookup mismatch - spoofed address?\n"); | |
539 | } | |
540 | } | |
541 | ||
ff8b29b8 AT |
542 | return name_buf; |
543 | } | |
5c9730a4 | 544 | |
d58911fb MP |
545 | /** |
546 | Convert a string to an IP address. The string can be a name or | |
547 | dotted decimal number. | |
548 | ||
549 | Returns a pointer to a static in_addr struct -- if you call this | |
550 | more than once then you should copy it. | |
551 | */ | |
5c9730a4 AT |
552 | struct in_addr *ip_address(const char *str) |
553 | { | |
554 | static struct in_addr ret; | |
555 | struct hostent *hp; | |
556 | ||
f8014b86 MP |
557 | if (!str) { |
558 | rprintf (FERROR, "ip_address received NULL name\n"); | |
559 | return NULL; | |
560 | } | |
d58911fb | 561 | |
5c9730a4 AT |
562 | /* try as an IP address */ |
563 | if (inet_aton(str, &ret) != 0) { | |
564 | return &ret; | |
565 | } | |
566 | ||
567 | /* otherwise assume it's a network name of some sort and use | |
568 | gethostbyname */ | |
7d91d5a6 | 569 | if ((hp = gethostbyname (str)) == 0) { |
d58911fb | 570 | rprintf(FERROR, "gethostbyname failed for \"%s\": unknown host?\n",str); |
5c9730a4 AT |
571 | return NULL; |
572 | } | |
573 | ||
574 | if (hp->h_addr == NULL) { | |
d58911fb | 575 | rprintf(FERROR, "gethostbyname: host address is invalid for host \"%s\"\n",str); |
5c9730a4 AT |
576 | return NULL; |
577 | } | |
578 | ||
7d91d5a6 | 579 | if (hp->h_length > sizeof ret) { |
d58911fb MP |
580 | rprintf(FERROR, "gethostbyname: host address for \"%s\" is too large\n", |
581 | str); | |
5c9730a4 AT |
582 | return NULL; |
583 | } | |
584 | ||
7d91d5a6 MP |
585 | if (hp->h_addrtype != AF_INET) { |
586 | rprintf (FERROR, "gethostname: host address for \"%s\" is not IPv4\n", | |
587 | str); | |
588 | return NULL; | |
589 | } | |
590 | ||
591 | /* This is kind of difficult. The only field in ret is | |
592 | s_addr, which is the IP address as a 32-bit int. On | |
593 | UNICOS, s_addr is in fact a *bitfield* for reasons best | |
594 | know to Cray. This means we can't memcpy in to it. On the | |
595 | other hand, h_addr is a char*, so we can't just assign. | |
596 | ||
597 | Since there's meant to be only one field inside the in_addr | |
598 | structure we will try just copying over the top and see how | |
599 | that goes. */ | |
600 | memcpy (&ret, hp->h_addr, hp->h_length); | |
5c9730a4 | 601 | |
7d91d5a6 | 602 | return &ret; |
5c9730a4 | 603 | } |
eecd22ff MP |
604 | |
605 | ||
606 | ||
607 | /******************************************************************* | |
608 | this is like socketpair but uses tcp. It is used by the Samba | |
609 | regression test code | |
610 | The function guarantees that nobody else can attach to the socket, | |
611 | or if they do that this function fails and the socket gets closed | |
612 | returns 0 on success, -1 on failure | |
613 | the resulting file descriptors are symmetrical | |
614 | ******************************************************************/ | |
615 | static int socketpair_tcp(int fd[2]) | |
616 | { | |
617 | int listener; | |
618 | struct sockaddr_in sock; | |
619 | struct sockaddr_in sock2; | |
620 | socklen_t socklen = sizeof(sock); | |
621 | int connect_done = 0; | |
622 | ||
623 | fd[0] = fd[1] = listener = -1; | |
624 | ||
625 | memset(&sock, 0, sizeof(sock)); | |
626 | ||
627 | if ((listener = socket(PF_INET, SOCK_STREAM, 0)) == -1) goto failed; | |
628 | ||
629 | memset(&sock2, 0, sizeof(sock2)); | |
630 | #ifdef HAVE_SOCK_SIN_LEN | |
631 | sock2.sin_len = sizeof(sock2); | |
632 | #endif | |
633 | sock2.sin_family = PF_INET; | |
634 | ||
635 | bind(listener, (struct sockaddr *)&sock2, sizeof(sock2)); | |
636 | ||
637 | if (listen(listener, 1) != 0) goto failed; | |
638 | ||
639 | if (getsockname(listener, (struct sockaddr *)&sock, &socklen) != 0) goto failed; | |
640 | ||
641 | if ((fd[1] = socket(PF_INET, SOCK_STREAM, 0)) == -1) goto failed; | |
642 | ||
643 | set_nonblocking(fd[1]); | |
644 | ||
645 | sock.sin_addr.s_addr = htonl(INADDR_LOOPBACK); | |
646 | ||
647 | if (connect(fd[1],(struct sockaddr *)&sock,sizeof(sock)) == -1) { | |
648 | if (errno != EINPROGRESS) goto failed; | |
649 | } else { | |
650 | connect_done = 1; | |
651 | } | |
652 | ||
653 | if ((fd[0] = accept(listener, (struct sockaddr *)&sock, &socklen)) == -1) goto failed; | |
654 | ||
655 | close(listener); | |
656 | if (connect_done == 0) { | |
657 | if (connect(fd[1],(struct sockaddr *)&sock,sizeof(sock)) != 0 | |
658 | && errno != EISCONN) goto failed; | |
659 | } | |
660 | ||
661 | set_blocking (fd[1]); | |
662 | ||
663 | /* all OK! */ | |
664 | return 0; | |
665 | ||
666 | failed: | |
667 | if (fd[0] != -1) close(fd[0]); | |
668 | if (fd[1] != -1) close(fd[1]); | |
669 | if (listener != -1) close(listener); | |
670 | return -1; | |
671 | } | |
672 | ||
673 | ||
674 | /******************************************************************* | |
675 | run a program on a local tcp socket, this is used to launch smbd | |
676 | when regression testing | |
677 | the return value is a socket which is attached to a subprocess | |
678 | running "prog". stdin and stdout are attached. stderr is left | |
679 | attached to the original stderr | |
680 | ******************************************************************/ | |
681 | int sock_exec(const char *prog) | |
682 | { | |
683 | int fd[2]; | |
684 | if (socketpair_tcp(fd) != 0) { | |
685 | rprintf (FERROR, RSYNC_NAME | |
686 | ": socketpair_tcp failed (%s)\n", | |
687 | strerror(errno)); | |
688 | return -1; | |
689 | } | |
690 | if (fork() == 0) { | |
691 | close(fd[0]); | |
692 | close(0); | |
693 | close(1); | |
694 | dup(fd[1]); | |
695 | dup(fd[1]); | |
696 | if (verbose > 3) | |
697 | fprintf (stderr, | |
698 | RSYNC_NAME ": execute socket program \"%s\"\n", | |
699 | prog); | |
700 | exit (system (prog)); | |
701 | } | |
702 | close (fd[1]); | |
703 | return fd[0]; | |
704 | } | |
705 | ||
706 | ||
707 |