test/src/server.c

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