Commit | Line | Data |
---|---|---|
c55a77db PH |
1 | /* A little hacked up program that listens on a given port and allows a script |
2 | to play the part of a remote MTA for testing purposes. This scripted version is | |
3 | hacked from my original interactive version. A further hack allows it to listen | |
4 | on a Unix domain socket as an alternative to a TCP/IP port. | |
5 | ||
6 | In an IPv6 world, listening happens on both an IPv6 and an IPv4 socket, always | |
7 | on all interfaces, unless the option -noipv6 is given. */ | |
8 | ||
9 | /* ANSI C standard includes */ | |
10 | ||
11 | #include <ctype.h> | |
12 | #include <signal.h> | |
13 | #include <stdarg.h> | |
14 | #include <stddef.h> | |
15 | #include <stdio.h> | |
16 | #include <stdlib.h> | |
17 | #include <string.h> | |
18 | #include <time.h> | |
19 | ||
20 | /* Unix includes */ | |
21 | ||
22 | #include <errno.h> | |
23 | #include <dirent.h> | |
24 | #include <sys/types.h> | |
25 | ||
26 | #include <netinet/in_systm.h> | |
27 | #include <netinet/in.h> | |
28 | #include <netinet/ip.h> | |
29 | ||
30 | #ifdef HAVE_NETINET_IP_VAR_H | |
dd7b74e9 | 31 | # include <netinet/ip_var.h> |
c55a77db PH |
32 | #endif |
33 | ||
34 | #include <netdb.h> | |
35 | #include <arpa/inet.h> | |
36 | #include <sys/time.h> | |
37 | #include <sys/resource.h> | |
38 | #include <sys/socket.h> | |
39 | #include <sys/un.h> | |
40 | #include <sys/stat.h> | |
41 | #include <fcntl.h> | |
42 | #include <unistd.h> | |
43 | #include <utime.h> | |
44 | ||
45 | #ifdef AF_INET6 | |
a719fce4 | 46 | # define HAVE_IPV6 1 |
c55a77db PH |
47 | #endif |
48 | ||
49 | #ifndef S_ADDR_TYPE | |
a719fce4 JH |
50 | # define S_ADDR_TYPE u_long |
51 | #endif | |
52 | ||
53 | #ifndef CS | |
54 | # define CS (char *) | |
8cfd0f7b | 55 | # define CCS (const char *) |
c55a77db PH |
56 | #endif |
57 | ||
58 | ||
59 | typedef struct line { | |
60 | struct line *next; | |
7eb6c37c | 61 | unsigned len; |
c55a77db PH |
62 | char line[1]; |
63 | } line; | |
64 | ||
dd7b74e9 JH |
65 | typedef unsigned BOOL; |
66 | #define FALSE 0 | |
67 | #define TRUE 1 | |
68 | ||
c55a77db PH |
69 | |
70 | /************************************************* | |
71 | * SIGALRM handler - crash out * | |
72 | *************************************************/ | |
59eaad2b | 73 | int tmo_noerror = 0; |
c55a77db PH |
74 | |
75 | static void | |
76 | sigalrm_handler(int sig) | |
77 | { | |
78 | sig = sig; /* Keep picky compilers happy */ | |
79 | printf("\nServer timed out\n"); | |
59eaad2b | 80 | exit(tmo_noerror ? 0 : 99); |
c55a77db PH |
81 | } |
82 | ||
83 | ||
84 | /************************************************* | |
85 | * Get textual IP address * | |
86 | *************************************************/ | |
87 | ||
88 | /* This function is copied from Exim */ | |
89 | ||
90 | char * | |
91 | host_ntoa(const void *arg, char *buffer) | |
92 | { | |
93 | char *yield; | |
94 | ||
95 | /* The new world. It is annoying that we have to fish out the address from | |
96 | different places in the block, depending on what kind of address it is. It | |
97 | is also a pain that inet_ntop() returns a const char *, whereas the IPv4 | |
98 | function inet_ntoa() returns just char *, and some picky compilers insist | |
99 | on warning if one assigns a const char * to a char *. Hence the casts. */ | |
100 | ||
101 | #if HAVE_IPV6 | |
102 | char addr_buffer[46]; | |
103 | int family = ((struct sockaddr *)arg)->sa_family; | |
104 | if (family == AF_INET6) | |
105 | { | |
106 | struct sockaddr_in6 *sk = (struct sockaddr_in6 *)arg; | |
107 | yield = (char *)inet_ntop(family, &(sk->sin6_addr), addr_buffer, | |
108 | sizeof(addr_buffer)); | |
109 | } | |
110 | else | |
111 | { | |
112 | struct sockaddr_in *sk = (struct sockaddr_in *)arg; | |
113 | yield = (char *)inet_ntop(family, &(sk->sin_addr), addr_buffer, | |
114 | sizeof(addr_buffer)); | |
115 | } | |
116 | ||
117 | /* If the result is a mapped IPv4 address, show it in V4 format. */ | |
118 | ||
119 | if (strncmp(yield, "::ffff:", 7) == 0) yield += 7; | |
120 | ||
121 | #else /* HAVE_IPV6 */ | |
122 | ||
123 | /* The old world */ | |
124 | ||
125 | yield = inet_ntoa(((struct sockaddr_in *)arg)->sin_addr); | |
126 | #endif | |
127 | ||
128 | strcpy(buffer, yield); | |
129 | return buffer; | |
130 | } | |
131 | ||
132 | ||
7eb6c37c JH |
133 | |
134 | static void | |
135 | printit(char * s, int n) | |
136 | { | |
137 | while(n--) | |
138 | { | |
139 | unsigned char c = *s++; | |
140 | if (c == '\\') | |
141 | printf("\\\\"); | |
142 | else if (c >= ' ' && c <= '~') /* assumes ascii */ | |
143 | putchar(c); | |
144 | else | |
145 | printf("\\x%02x", c); | |
146 | } | |
147 | putchar('\n'); | |
148 | } | |
149 | ||
150 | ||
151 | ||
c55a77db PH |
152 | /************************************************* |
153 | * Main Program * | |
154 | *************************************************/ | |
155 | ||
156 | #define v6n 0 /* IPv6 socket number */ | |
157 | #define v4n 1 /* IPv4 socket number */ | |
158 | #define udn 2 /* Unix domain socket number */ | |
159 | #define skn 2 /* Potential number of sockets */ | |
160 | ||
161 | int main(int argc, char **argv) | |
162 | { | |
163 | int i; | |
164 | int port = 0; | |
165 | int listen_socket[3] = { -1, -1, -1 }; | |
166 | int accept_socket; | |
167 | int dup_accept_socket; | |
168 | int connection_count = 1; | |
169 | int count; | |
170 | int on = 1; | |
171 | int timeout = 5; | |
8a512ed5 | 172 | int initial_pause = 0; |
c55a77db PH |
173 | int use_ipv4 = 1; |
174 | int use_ipv6 = 1; | |
175 | int debug = 0; | |
176 | int na = 1; | |
177 | line *script = NULL; | |
178 | line *last = NULL; | |
179 | line *s; | |
180 | FILE *in, *out; | |
7eb6c37c | 181 | int linebuf = 1; |
f41e0506 | 182 | char *pidfile = NULL; |
c55a77db PH |
183 | |
184 | char *sockname = NULL; | |
185 | unsigned char buffer[10240]; | |
186 | ||
187 | struct sockaddr_un sockun; /* don't use "sun" */ | |
188 | struct sockaddr_un sockun_accepted; | |
189 | int sockun_len = sizeof(sockun_accepted); | |
190 | ||
191 | #if HAVE_IPV6 | |
192 | struct sockaddr_in6 sin6; | |
193 | struct sockaddr_in6 accepted; | |
194 | struct in6_addr anyaddr6 = IN6ADDR_ANY_INIT ; | |
195 | #else | |
196 | struct sockaddr_in accepted; | |
197 | #endif | |
198 | ||
199 | /* Always need an IPv4 structure */ | |
200 | ||
201 | struct sockaddr_in sin4; | |
202 | ||
203 | int len = sizeof(accepted); | |
204 | ||
205 | ||
206 | /* Sort out the arguments */ | |
e5c9fb3c HSHR |
207 | if (argc > 1 && (!strcmp(argv[1], "--help") || !strcmp(argv[1], "-h"))) |
208 | { | |
214133f2 | 209 | printf("Usage: %s [options] port|socket [connection count]\n", argv[0]); |
e5c9fb3c HSHR |
210 | puts("Options" |
211 | "\n\t-d debug" | |
212 | "\n\t-i n n seconds initial delay" | |
213 | "\n\t-noipv4 disable ipv4" | |
214 | "\n\t-noipv6 disable ipv6" | |
215 | "\n\t-oP file write PID to file" | |
216 | "\n\t-t n n seconds timeout" | |
217 | ); | |
218 | exit(0); | |
219 | } | |
c55a77db PH |
220 | |
221 | while (na < argc && argv[na][0] == '-') | |
222 | { | |
223 | if (strcmp(argv[na], "-d") == 0) debug = 1; | |
59eaad2b JH |
224 | else if (strcmp(argv[na], "-t") == 0) |
225 | { | |
226 | if (tmo_noerror = ((timeout = atoi(argv[++na])) < 0)) timeout = -timeout; | |
227 | } | |
8a512ed5 | 228 | else if (strcmp(argv[na], "-i") == 0) initial_pause = atoi(argv[++na]); |
c55a77db PH |
229 | else if (strcmp(argv[na], "-noipv4") == 0) use_ipv4 = 0; |
230 | else if (strcmp(argv[na], "-noipv6") == 0) use_ipv6 = 0; | |
f41e0506 | 231 | else if (strcmp(argv[na], "-oP") == 0) pidfile = argv[++na]; |
c55a77db PH |
232 | else |
233 | { | |
e5c9fb3c | 234 | printf("server: unknown option %s, try -h or --help\n", argv[na]); |
c55a77db PH |
235 | exit(1); |
236 | } | |
237 | na++; | |
238 | } | |
239 | ||
240 | if (!use_ipv4 && !use_ipv6) | |
241 | { | |
242 | printf("server: -noipv4 and -noipv6 cannot both be given\n"); | |
243 | exit(1); | |
244 | } | |
245 | ||
246 | if (na >= argc) | |
247 | { | |
248 | printf("server: no port number or socket name given\n"); | |
249 | exit(1); | |
250 | } | |
251 | ||
252 | if (argv[na][0] == '/') | |
253 | { | |
254 | sockname = argv[na]; | |
255 | unlink(sockname); /* in case left lying around */ | |
256 | } | |
257 | else port = atoi(argv[na]); | |
258 | na++; | |
259 | ||
260 | if (na < argc) connection_count = atoi(argv[na]); | |
261 | ||
262 | ||
8a512ed5 JH |
263 | /* Initial pause (before creating listen sockets */ |
264 | if (initial_pause > 0) | |
265 | { | |
266 | if (debug) | |
267 | printf("%d: Inital pause of %d seconds\n", time(NULL), initial_pause); | |
268 | else | |
269 | printf("Inital pause of %d seconds\n", initial_pause); | |
270 | while (initial_pause > 0) | |
271 | initial_pause = sleep(initial_pause); | |
272 | } | |
273 | ||
c55a77db PH |
274 | /* Create sockets */ |
275 | ||
276 | if (port == 0) /* Unix domain */ | |
277 | { | |
8a512ed5 | 278 | if (debug) printf("%d: Creating Unix domain socket\n", time(NULL)); |
c55a77db PH |
279 | listen_socket[udn] = socket(PF_UNIX, SOCK_STREAM, 0); |
280 | if (listen_socket[udn] < 0) | |
281 | { | |
282 | printf("Unix domain socket creation failed: %s\n", strerror(errno)); | |
283 | exit(1); | |
284 | } | |
285 | } | |
286 | else | |
287 | { | |
288 | #if HAVE_IPV6 | |
289 | if (use_ipv6) | |
290 | { | |
291 | if (debug) printf("Creating IPv6 socket\n"); | |
292 | listen_socket[v6n] = socket(AF_INET6, SOCK_STREAM, 0); | |
293 | if (listen_socket[v6n] < 0) | |
294 | { | |
295 | printf("IPv6 socket creation failed: %s\n", strerror(errno)); | |
296 | exit(1); | |
297 | } | |
298 | ||
299 | /* If this is an IPv6 wildcard socket, set IPV6_V6ONLY if that option is | |
300 | available. */ | |
301 | ||
302 | #ifdef IPV6_V6ONLY | |
303 | if (setsockopt(listen_socket[v6n], IPPROTO_IPV6, IPV6_V6ONLY, (char *)(&on), | |
304 | sizeof(on)) < 0) | |
305 | printf("Setting IPV6_V6ONLY on IPv6 wildcard " | |
306 | "socket failed (%s): carrying on without it\n", strerror(errno)); | |
307 | #endif /* IPV6_V6ONLY */ | |
308 | } | |
309 | #endif /* HAVE_IPV6 */ | |
310 | ||
311 | /* Create an IPv4 socket if required */ | |
312 | ||
313 | if (use_ipv4) | |
314 | { | |
315 | if (debug) printf("Creating IPv4 socket\n"); | |
316 | listen_socket[v4n] = socket(AF_INET, SOCK_STREAM, 0); | |
317 | if (listen_socket[v4n] < 0) | |
318 | { | |
319 | printf("IPv4 socket creation failed: %s\n", strerror(errno)); | |
320 | exit(1); | |
321 | } | |
322 | } | |
323 | } | |
324 | ||
325 | ||
326 | /* Set SO_REUSEADDR on the IP sockets so that the program can be restarted | |
327 | while a connection is being handled - this can happen as old connections lie | |
328 | around for a bit while crashed processes are tidied away. Without this, a | |
329 | connection will prevent reuse of the smtp port for listening. */ | |
330 | ||
331 | for (i = v6n; i <= v4n; i++) | |
332 | { | |
333 | if (listen_socket[i] >= 0 && | |
334 | setsockopt(listen_socket[i], SOL_SOCKET, SO_REUSEADDR, (char *)(&on), | |
335 | sizeof(on)) < 0) | |
336 | { | |
337 | printf("setting SO_REUSEADDR on socket failed: %s\n", strerror(errno)); | |
338 | exit(1); | |
339 | } | |
340 | } | |
341 | ||
342 | ||
343 | /* Now bind the sockets to the required port or path. If a path, ensure | |
344 | anyone can write to it. */ | |
345 | ||
346 | if (port == 0) | |
347 | { | |
348 | struct stat statbuf; | |
349 | sockun.sun_family = AF_UNIX; | |
350 | if (debug) printf("Binding Unix domain socket\n"); | |
351 | sprintf(sockun.sun_path, "%.*s", (int)(sizeof(sockun.sun_path)-1), sockname); | |
352 | if (bind(listen_socket[udn], (struct sockaddr *)&sockun, sizeof(sockun)) < 0) | |
353 | { | |
354 | printf("Unix domain socket bind() failed: %s\n", strerror(errno)); | |
355 | exit(1); | |
356 | } | |
357 | (void)stat(sockname, &statbuf); | |
358 | if (debug) printf("Setting Unix domain socket mode: %0x\n", | |
359 | statbuf.st_mode | 0777); | |
360 | if (chmod(sockname, statbuf.st_mode | 0777) < 0) | |
361 | { | |
362 | printf("Unix domain socket chmod() failed: %s\n", strerror(errno)); | |
363 | exit(1); | |
364 | } | |
365 | } | |
366 | ||
367 | else | |
368 | { | |
369 | for (i = 0; i < skn; i++) | |
370 | { | |
371 | if (listen_socket[i] < 0) continue; | |
372 | ||
373 | /* For an IPv6 listen, use an IPv6 socket */ | |
374 | ||
375 | #if HAVE_IPV6 | |
376 | if (i == v6n) | |
377 | { | |
378 | memset(&sin6, 0, sizeof(sin6)); | |
379 | sin6.sin6_family = AF_INET6; | |
380 | sin6.sin6_port = htons(port); | |
381 | sin6.sin6_addr = anyaddr6; | |
382 | if (bind(listen_socket[i], (struct sockaddr *)&sin6, sizeof(sin6)) < 0) | |
383 | { | |
384 | printf("IPv6 socket bind() failed: %s\n", strerror(errno)); | |
385 | exit(1); | |
386 | } | |
387 | } | |
388 | else | |
389 | #endif | |
390 | ||
391 | /* For an IPv4 bind, use an IPv4 socket, even in an IPv6 world. If an IPv4 | |
392 | bind fails EADDRINUSE after IPv6 success, carry on, because it means the | |
393 | IPv6 socket will handle IPv4 connections. */ | |
394 | ||
395 | { | |
396 | memset(&sin4, 0, sizeof(sin4)); | |
397 | sin4.sin_family = AF_INET; | |
398 | sin4.sin_addr.s_addr = (S_ADDR_TYPE)INADDR_ANY; | |
399 | sin4.sin_port = htons(port); | |
400 | if (bind(listen_socket[i], (struct sockaddr *)&sin4, sizeof(sin4)) < 0) | |
c55a77db PH |
401 | if (listen_socket[v6n] < 0 || errno != EADDRINUSE) |
402 | { | |
403 | printf("IPv4 socket bind() failed: %s\n", strerror(errno)); | |
404 | exit(1); | |
405 | } | |
406 | else | |
407 | { | |
408 | close(listen_socket[i]); | |
409 | listen_socket[i] = -1; | |
410 | } | |
c55a77db PH |
411 | } |
412 | } | |
413 | } | |
414 | ||
415 | ||
416 | /* Start listening. If IPv4 fails EADDRINUSE after IPv6 succeeds, ignore the | |
417 | error because it means that the IPv6 socket will handle IPv4 connections. Don't | |
418 | output anything, because it will mess up the test output, which will be | |
419 | different for systems that do this and those that don't. */ | |
420 | ||
421 | for (i = 0; i <= skn; i++) | |
422 | { | |
423 | if (listen_socket[i] >= 0 && listen(listen_socket[i], 5) < 0) | |
424 | { | |
425 | if (i != v4n || listen_socket[v6n] < 0 || errno != EADDRINUSE) | |
426 | { | |
427 | printf("listen() failed: %s\n", strerror(errno)); | |
428 | exit(1); | |
429 | } | |
430 | } | |
431 | } | |
432 | ||
433 | ||
f41e0506 JH |
434 | if (pidfile) |
435 | { | |
436 | FILE * p; | |
437 | if (!(p = fopen(pidfile, "w"))) | |
438 | { | |
439 | fprintf(stderr, "pidfile create failed: %s\n", strerror(errno)); | |
440 | exit(1); | |
441 | } | |
442 | fprintf(p, "%ld\n", (long)getpid()); | |
443 | fclose(p); | |
444 | } | |
445 | ||
c55a77db PH |
446 | /* This program handles only a fixed number of connections, in sequence. Before |
447 | waiting for the first connection, read the standard input, which contains the | |
448 | script of things to do. A line containing "++++" is treated as end of file. | |
449 | This is so that the Perl driving script doesn't have to close the pipe - | |
450 | because that would cause it to wait for this process, which it doesn't yet want | |
451 | to do. The driving script adds the "++++" automatically - it doesn't actually | |
7eb6c37c | 452 | appear in the test script. Within lines we interpret \xNN and \\ groups */ |
c55a77db | 453 | |
a719fce4 | 454 | while (fgets(CS buffer, sizeof(buffer), stdin) != NULL) |
c55a77db PH |
455 | { |
456 | line *next; | |
7eb6c37c | 457 | char * d; |
a719fce4 | 458 | int n = (int)strlen(CS buffer); |
7eb6c37c JH |
459 | |
460 | if (n > 1 && buffer[0] == '>' && buffer[1] == '>') | |
461 | linebuf = 0; | |
c55a77db PH |
462 | while (n > 0 && isspace(buffer[n-1])) n--; |
463 | buffer[n] = 0; | |
a719fce4 | 464 | if (strcmp(CS buffer, "++++") == 0) break; |
c55a77db PH |
465 | next = malloc(sizeof(line) + n); |
466 | next->next = NULL; | |
7eb6c37c JH |
467 | d = next->line; |
468 | { | |
469 | char * s = CS buffer; | |
470 | do | |
471 | { | |
472 | char ch; | |
473 | char cl = *s; | |
474 | if (cl == '\\' && (cl = *++s) == 'x') | |
475 | { | |
476 | if ((ch = *++s - '0') > 9 && (ch -= 'A'-'9'-1) > 15) ch -= 'a'-'A'; | |
477 | if ((cl = *++s - '0') > 9 && (cl -= 'A'-'9'-1) > 15) cl -= 'a'-'A'; | |
478 | cl |= ch << 4; | |
479 | } | |
480 | *d++ = cl; | |
481 | } | |
482 | while (*s++); | |
483 | } | |
484 | next->len = d - next->line - 1; | |
c55a77db PH |
485 | if (last == NULL) script = last = next; |
486 | else last->next = next; | |
487 | last = next; | |
488 | } | |
489 | ||
490 | fclose(stdin); | |
491 | ||
492 | /* SIGALRM handler crashes out */ | |
493 | ||
494 | signal(SIGALRM, sigalrm_handler); | |
495 | ||
496 | /* s points to the current place in the script */ | |
497 | ||
498 | s = script; | |
499 | ||
500 | for (count = 0; count < connection_count; count++) | |
501 | { | |
f6f23946 HSHR |
502 | struct { |
503 | int left; | |
dd7b74e9 JH |
504 | BOOL in_use; |
505 | } content_length = { 0, FALSE }; | |
f6f23946 | 506 | |
c55a77db PH |
507 | alarm(timeout); |
508 | if (port <= 0) | |
509 | { | |
510 | printf("Listening on %s ... ", sockname); | |
511 | fflush(stdout); | |
512 | accept_socket = accept(listen_socket[udn], | |
513 | (struct sockaddr *)&sockun_accepted, &sockun_len); | |
514 | } | |
515 | ||
516 | else | |
517 | { | |
518 | int lcount; | |
519 | int max_socket = 0; | |
520 | fd_set select_listen; | |
521 | ||
522 | printf("Listening on port %d ... ", port); | |
523 | fflush(stdout); | |
524 | ||
525 | FD_ZERO(&select_listen); | |
526 | for (i = 0; i < skn; i++) | |
527 | { | |
528 | if (listen_socket[i] >= 0) FD_SET(listen_socket[i], &select_listen); | |
529 | if (listen_socket[i] > max_socket) max_socket = listen_socket[i]; | |
530 | } | |
531 | ||
dd7b74e9 | 532 | if ((lcount = select(max_socket + 1, &select_listen, NULL, NULL, NULL)) < 0) |
c55a77db PH |
533 | { |
534 | printf("Select failed\n"); | |
535 | fflush(stdout); | |
536 | continue; | |
537 | } | |
538 | ||
539 | accept_socket = -1; | |
540 | for (i = 0; i < skn; i++) | |
c55a77db PH |
541 | if (listen_socket[i] > 0 && FD_ISSET(listen_socket[i], &select_listen)) |
542 | { | |
543 | accept_socket = accept(listen_socket[i], | |
544 | (struct sockaddr *)&accepted, &len); | |
545 | FD_CLR(listen_socket[i], &select_listen); | |
546 | break; | |
547 | } | |
c55a77db PH |
548 | } |
549 | alarm(0); | |
550 | ||
551 | if (accept_socket < 0) | |
552 | { | |
553 | printf("accept() failed: %s\n", strerror(errno)); | |
554 | exit(1); | |
555 | } | |
556 | ||
557 | out = fdopen(accept_socket, "w"); | |
558 | ||
559 | dup_accept_socket = dup(accept_socket); | |
560 | ||
561 | if (port > 0) | |
a719fce4 | 562 | printf("\nConnection request from [%s]\n", host_ntoa(&accepted, CS buffer)); |
c55a77db PH |
563 | else |
564 | { | |
565 | printf("\nConnection request\n"); | |
566 | ||
567 | /* Linux supports a feature for acquiring the peer's credentials, but it | |
568 | appears to be Linux-specific. This code is untested and unused, just | |
569 | saved here for reference. */ | |
570 | ||
571 | /**********-------------------- | |
572 | struct ucred cr; | |
573 | int cl=sizeof(cr); | |
574 | ||
575 | if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &cr, &cl)==0) { | |
576 | printf("Peer's pid=%d, uid=%d, gid=%d\n", | |
577 | cr.pid, cr.uid, cr.gid); | |
578 | --------------*****************/ | |
579 | } | |
b9d9c5a2 | 580 | fflush(stdout); |
c55a77db PH |
581 | |
582 | if (dup_accept_socket < 0) | |
583 | { | |
584 | printf("Couldn't dup socket descriptor\n"); | |
585 | printf("421 Connection refused: %s\n", strerror(errno)); | |
586 | fprintf(out, "421 Connection refused: %s\r\n", strerror(errno)); | |
587 | fclose(out); | |
588 | exit(2); | |
589 | } | |
590 | ||
591 | in = fdopen(dup_accept_socket, "r"); | |
592 | ||
593 | /* Loop for handling the conversation(s). For use in SMTP sessions, there are | |
594 | default rules for determining input and output lines: the latter start with | |
595 | digits. This means that the input looks like SMTP dialog. However, this | |
596 | doesn't work for other tests (e.g. ident tests) so we have explicit '<' and | |
597 | '>' flags for input and output as well as the defaults. */ | |
598 | ||
dd7b74e9 | 599 | for (; s; s = s->next) |
c55a77db PH |
600 | { |
601 | char *ss = s->line; | |
602 | ||
603 | /* Output lines either start with '>' or a digit. In the '>' case we can | |
604 | fudge the sending of \r\n as required. Default is \r\n, ">>" send nothing, | |
605 | ">CR>" sends \r only, and ">LF>" sends \n only. We can also force a | |
606 | connection closedown by ">*eof". */ | |
607 | ||
608 | if (ss[0] == '>') | |
609 | { | |
610 | char *end = "\r\n"; | |
7eb6c37c JH |
611 | unsigned len = s->len; |
612 | printit(ss++, len--); | |
c55a77db PH |
613 | |
614 | if (strncmp(ss, "*eof", 4) == 0) | |
615 | { | |
616 | s = s->next; | |
617 | goto END_OFF; | |
618 | } | |
619 | ||
620 | if (*ss == '>') | |
7eb6c37c | 621 | { end = ""; ss++; len--; } |
c55a77db | 622 | else if (strncmp(ss, "CR>", 3) == 0) |
7eb6c37c | 623 | { end = "\r"; ss += 3; len -= 3; } |
c55a77db | 624 | else if (strncmp(ss, "LF>", 3) == 0) |
7eb6c37c | 625 | { end = "\n"; ss += 3; len -= 3; } |
c55a77db | 626 | |
7eb6c37c JH |
627 | fwrite(ss, 1, len, out); |
628 | if (*end) fprintf(out, end); | |
c55a77db PH |
629 | } |
630 | ||
631 | else if (isdigit((unsigned char)ss[0])) | |
632 | { | |
633 | printf("%s\n", ss); | |
634 | fprintf(out, "%s\r\n", ss); | |
635 | } | |
636 | ||
637 | /* If the script line starts with "*sleep" we just sleep for a while | |
638 | before continuing. */ | |
639 | ||
640 | else if (strncmp(ss, "*sleep ", 7) == 0) | |
641 | { | |
642 | int sleepfor = atoi(ss+7); | |
643 | printf("%s\n", ss); | |
644 | fflush(out); | |
645 | sleep(sleepfor); | |
646 | } | |
647 | ||
e027f545 JH |
648 | /* If the script line starts with "*data " we expect a numeric argument, |
649 | and we expect to read (and discard) that many data bytes from the input. */ | |
650 | ||
651 | else if (strncmp(ss, "*data ", 6) == 0) | |
652 | { | |
653 | int dlen = atoi(ss+6); | |
654 | int n; | |
655 | ||
656 | alarm(timeout); | |
657 | ||
658 | if (!linebuf) | |
659 | while (dlen > 0) | |
660 | { | |
661 | n = dlen < sizeof(buffer) ? dlen : sizeof(buffer); | |
662 | if ((n = read(dup_accept_socket, CS buffer, n)) == 0) | |
663 | { | |
4c04137d | 664 | printf("Unexpected EOF read from client\n"); |
e027f545 JH |
665 | s = s->next; |
666 | goto END_OFF; | |
667 | } | |
668 | dlen -= n; | |
669 | } | |
670 | else | |
671 | while (dlen-- > 0) | |
672 | if (fgetc(in) == EOF) | |
673 | { | |
4c04137d | 674 | printf("Unexpected EOF read from client\n"); |
e027f545 JH |
675 | s = s->next; |
676 | goto END_OFF; | |
677 | } | |
678 | } | |
679 | ||
c55a77db PH |
680 | /* Otherwise the script line is the start of an input line we are expecting |
681 | from the client, or "*eof" indicating we expect the client to close the | |
682 | connection. Read command line or data lines; the latter are indicated | |
683 | by the expected line being just ".". If the line starts with '<', that | |
684 | doesn't form part of the expected input. (This allows for incoming data | |
7eb6c37c JH |
685 | starting with a digit.) If the line starts with '<<' we operate in |
686 | unbuffered rather than line mode and assume that a single read gets the | |
687 | entire message. */ | |
c55a77db PH |
688 | |
689 | else | |
690 | { | |
691 | int offset; | |
692 | int data = strcmp(ss, ".") == 0; | |
693 | ||
7eb6c37c JH |
694 | if (ss[0] != '<') |
695 | offset = 0; | |
696 | else | |
c55a77db PH |
697 | { |
698 | buffer[0] = '<'; | |
7eb6c37c JH |
699 | if (ss[1] != '<') |
700 | offset = 1; | |
701 | else | |
702 | { | |
703 | buffer[1] = '<'; | |
704 | offset = 2; | |
705 | } | |
c55a77db | 706 | } |
c55a77db PH |
707 | |
708 | fflush(out); | |
709 | ||
7eb6c37c JH |
710 | if (!linebuf) |
711 | { | |
712 | int n; | |
713 | char c; | |
714 | ||
715 | alarm(timeout); | |
716 | n = read(dup_accept_socket, CS buffer+offset, s->len - offset); | |
f6f23946 | 717 | if (content_length.in_use) content_length.left -= n; |
7eb6c37c JH |
718 | if (n == 0) |
719 | { | |
720 | printf("%sxpected EOF read from client\n", | |
721 | (strncmp(ss, "*eof", 4) == 0)? "E" : "Une"); | |
722 | s = s->next; | |
723 | goto END_OFF; | |
724 | } | |
725 | if (offset != 2) | |
726 | while (read(dup_accept_socket, &c, 1) == 1 && c != '\n') ; | |
727 | alarm(0); | |
728 | n += offset; | |
729 | ||
8cfd0f7b | 730 | printit(CS buffer, n); |
7eb6c37c JH |
731 | |
732 | if (data) do | |
733 | { | |
734 | n = (read(dup_accept_socket, &c, 1) == 1 && c == '.'); | |
f6f23946 | 735 | if (content_length.in_use) content_length.left--; |
7eb6c37c | 736 | while (c != '\n' && read(dup_accept_socket, &c, 1) == 1) |
f6f23946 | 737 | if (content_length.in_use) content_length.left--; |
7eb6c37c JH |
738 | } while (!n); |
739 | else if (memcmp(ss, buffer, n) != 0) | |
740 | { | |
741 | printf("Comparison failed - bailing out\nExpected: "); | |
742 | printit(ss, n); | |
743 | break; | |
744 | } | |
745 | } | |
746 | else | |
747 | { | |
748 | for (;;) | |
749 | { | |
750 | int n; | |
751 | alarm(timeout); | |
752 | if (fgets(CS buffer+offset, sizeof(buffer)-offset, in) == NULL) | |
753 | { | |
754 | printf("%sxpected EOF read from client\n", | |
755 | (strncmp(ss, "*eof", 4) == 0)? "E" : "Une"); | |
756 | s = s->next; | |
757 | goto END_OFF; | |
758 | } | |
759 | alarm(0); | |
dd7b74e9 | 760 | n = strlen(CS buffer); |
f6f23946 | 761 | if (content_length.in_use) content_length.left -= (n - offset); |
7eb6c37c JH |
762 | while (n > 0 && isspace(buffer[n-1])) n--; |
763 | buffer[n] = 0; | |
764 | printf("%s\n", buffer); | |
765 | if (!data || strcmp(CS buffer, ".") == 0) break; | |
766 | } | |
767 | ||
768 | if (strncmp(ss, CS buffer, (int)strlen(ss)) != 0) | |
769 | { | |
770 | printf("Comparison failed - bailing out\n"); | |
771 | printf("Expected: %s\n", ss); | |
772 | break; | |
773 | } | |
774 | } | |
f6f23946 | 775 | |
8cfd0f7b JH |
776 | if (sscanf(CCS buffer, "<Content-length: %d", &content_length.left)) |
777 | content_length.in_use = TRUE; | |
778 | if (content_length.in_use && content_length.left <= 0) | |
779 | shutdown(dup_accept_socket, SHUT_RD); | |
c55a77db PH |
780 | } |
781 | } | |
782 | ||
783 | END_OFF: | |
784 | fclose(in); | |
785 | fclose(out); | |
786 | } | |
787 | ||
788 | if (s == NULL) printf("End of script\n"); | |
789 | ||
dd7b74e9 | 790 | if (sockname) unlink(sockname); |
c55a77db PH |
791 | exit(0); |
792 | } | |
793 | ||
794 | /* End of server.c */ |