webcit/tcp_sockets.c

   1 /*
   2  * $Id$
   3  */
   4
   5 /*
   6  * Uncomment this to log all communications with the Citadel server
   7 #define SERV_TRACE 1
   8  */
   9
  10
  11 #include "webcit.h"
  12 #include "webserver.h"
  13
  14 extern int DisableGzip;
  15
  16 /*
  17  * register the timeout
  18  */
  19 RETSIGTYPE timeout(int signum)
  20 {
  21         lprintf(1, "Connection timed out; unable to reach citserver\n");
  22         /* no exit here, since we need to server the connection unreachable thing. exit(3); */
  23 }
  24
  25
  26 /*
  27  *  Connect a unix domain socket
  28  *  sockpath where to open a unix domain socket
  29  */
  30 int uds_connectsock(char *sockpath)
  31 {
  32         struct sockaddr_un addr;
  33         int s;
  34
  35         memset(&addr, 0, sizeof(addr));
  36         addr.sun_family = AF_UNIX;
  37         strncpy(addr.sun_path, sockpath, sizeof addr.sun_path);
  38
  39         s = socket(AF_UNIX, SOCK_STREAM, 0);
  40         if (s < 0) {
  41                 lprintf(1, "Can't create socket[%s]: %s\n",
  42                         sockpath,
  43                         strerror(errno));
  44                 return(-1);
  45         }
  46
  47         if (connect(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
  48                 lprintf(1, "Can't connect [%s]: %s\n",
  49                         sockpath,
  50                         strerror(errno));
  51                 close(s);
  52                 return(-1);
  53         }
  54
  55         return s;
  56 }
  57
  58
  59 /*
  60  *  Connect a TCP/IP socket
  61  *  host the host to connect to
  62  *  service the service on the host to call
  63  */
  64 int tcp_connectsock(char *host, char *service)
  65 {
  66         int fdflags;
  67         struct hostent *phe;
  68         struct servent *pse;
  69         struct protoent *ppe;
  70         struct sockaddr_in sin;
  71         int s;
  72
  73         memset(&sin, 0, sizeof(sin));
  74         sin.sin_family = AF_INET;
  75
  76         pse = getservbyname(service, "tcp");
  77         if (pse) {
  78                 sin.sin_port = pse->s_port;
  79         } else if ((sin.sin_port = htons((u_short) atoi(service))) == 0) {
  80                 lprintf(1, "Can't get %s service entry\n", service);
  81                 return (-1);
  82         }
  83         phe = gethostbyname(host);
  84         if (phe) {
  85                 memcpy(&sin.sin_addr, phe->h_addr, phe->h_length);
  86         } else if ((sin.sin_addr.s_addr = inet_addr(host)) == INADDR_NONE) {
  87                 lprintf(1, "Can't get %s host entry: %s\n",
  88                         host, strerror(errno));
  89                 return (-1);
  90         }
  91         if ((ppe = getprotobyname("tcp")) == 0) {
  92                 lprintf(1, "Can't get TCP protocol entry: %s\n",
  93                         strerror(errno));
  94                 return (-1);
  95         }
  96
  97         s = socket(PF_INET, SOCK_STREAM, ppe->p_proto);
  98         if (s < 0) {
  99                 lprintf(1, "Can't create socket: %s\n", strerror(errno));
 100                 return (-1);
 101         }
 102
 103         fdflags = fcntl(s, F_GETFL);
 104         if (fdflags < 0)
 105                 lprintf(1, "unable to get socket flags!  %s.%s: %s \n",
 106                         host, service, strerror(errno));
 107         fdflags = fdflags | O_NONBLOCK;
 108         if (fcntl(s, F_SETFD, fdflags) < 0)
 109                 lprintf(1, "unable to set socket nonblocking flags!  %s.%s: %s \n",
 110                         host, service, strerror(errno));
 111
 112         signal(SIGALRM, timeout);
 113         alarm(30);
 114
 115         if (connect(s, (struct sockaddr *) &sin, sizeof(sin)) < 0) {
 116                 lprintf(1, "Can't connect to %s.%s: %s\n",
 117                         host, service, strerror(errno));
 118                 close(s);
 119                 return (-1);
 120         }
 121         alarm(0);
 122         signal(SIGALRM, SIG_IGN);
 123
 124         fdflags = fcntl(s, F_GETFL);
 125         if (fdflags < 0)
 126                 lprintf(1, "unable to get socket flags!  %s.%s: %s \n",
 127                         host, service, strerror(errno));
 128         fdflags = fdflags | O_NONBLOCK;
 129         if (fcntl(s, F_SETFD, fdflags) < 0)
 130                 lprintf(1, "unable to set socket nonblocking flags!  %s.%s: %s \n",
 131                         host, service, strerror(errno));
 132         return (s);
 133 }
 134
 135
 136
 137 /*
 138  *  input string from pipe
 139  */
 140 int serv_getln(char *strbuf, int bufsize)
 141 {
 142         wcsession *WCC = WC;
 143         int len;
 144
 145         *strbuf = '\0';
 146         StrBuf_ServGetln(WCC->MigrateReadLineBuf);
 147         len = StrLength(WCC->MigrateReadLineBuf);
 148         if (len > bufsize)
 149                 len = bufsize - 1;
 150         memcpy(strbuf, ChrPtr(WCC->MigrateReadLineBuf), len);
 151         FlushStrBuf(WCC->MigrateReadLineBuf);
 152         strbuf[len] = '\0';
 153 #ifdef SERV_TRACE
 154         lprintf(9, "%3d>%s\n", WC->serv_sock, strbuf);
 155 #endif
 156         return len;
 157 }
 158
 159
 160 int StrBuf_ServGetln(StrBuf *buf)
 161 {
 162         wcsession *WCC = WC;
 163         const char *ErrStr = NULL;
 164         int rc;
 165
 166         rc = StrBufTCP_read_buffered_line_fast(buf,
 167                                                WCC->ReadBuf,
 168                                                &WCC->ReadPos,
 169                                                &WCC->serv_sock,
 170                                                5, 1,
 171                                                &ErrStr);
 172         if (rc < 0)
 173         {
 174                 lprintf(1, "Server connection broken: %s\n",
 175                         ErrStr);
 176                 wc_backtrace();
 177                 WCC->serv_sock = (-1);
 178                 WCC->connected = 0;
 179                 WCC->logged_in = 0;
 180         }
 181         return rc;
 182 }
 183
 184 int StrBuf_ServGetBLOBBuffered(StrBuf *buf, long BlobSize)
 185 {
 186         wcsession *WCC = WC;
 187         const char *Err;
 188         int rc;
 189
 190         rc = StrBufReadBLOBBuffered(buf,
 191                                     WCC->ReadBuf,
 192                                     &WCC->ReadPos,
 193                                     &WCC->serv_sock,
 194                                     1,
 195                                     BlobSize,
 196                                     NNN_TERM,
 197                                     &Err);
 198         if (rc < 0)
 199         {
 200                 lprintf(1, "Server connection broken: %s\n",
 201                         Err);
 202                 wc_backtrace();
 203                 WCC->serv_sock = (-1);
 204                 WCC->connected = 0;
 205                 WCC->logged_in = 0;
 206         }
 207         return rc;
 208 }
 209
 210 int StrBuf_ServGetBLOB(StrBuf *buf, long BlobSize)
 211 {
 212         wcsession *WCC = WC;
 213         const char *Err;
 214         int rc;
 215
 216         WCC->ReadPos = NULL;
 217         rc = StrBufReadBLOB(buf, &WCC->serv_sock, 1, BlobSize, &Err);
 218         if (rc < 0)
 219         {
 220                 lprintf(1, "Server connection broken: %s\n",
 221                         Err);
 222                 wc_backtrace();
 223                 WCC->serv_sock = (-1);
 224                 WCC->connected = 0;
 225                 WCC->logged_in = 0;
 226         }
 227         return rc;
 228 }
 229
 230 /*
 231  *  send binary to server
 232  *  buf the buffer to write to citadel server
 233  *  nbytes how many bytes to send to citadel server
 234  */
 235 void serv_write(const char *buf, int nbytes)
 236 {
 237         wcsession *WCC = WC;
 238         int bytes_written = 0;
 239         int retval;
 240
 241         FlushStrBuf(WCC->ReadBuf);
 242         WCC->ReadPos = NULL;
 243         while (bytes_written < nbytes) {
 244                 retval = write(WCC->serv_sock, &buf[bytes_written],
 245                                nbytes - bytes_written);
 246                 if (retval < 1) {
 247                         lprintf(1, "Server connection broken: %s\n",
 248                                 strerror(errno));
 249                         close(WCC->serv_sock);
 250                         WCC->serv_sock = (-1);
 251                         WCC->connected = 0;
 252                         WCC->logged_in = 0;
 253                         return;
 254                 }
 255                 bytes_written = bytes_written + retval;
 256         }
 257 }
 258
 259
 260 /*
 261  *  send line to server
 262  *  string the line to send to the citadel server
 263  */
 264 void serv_puts(const char *string)
 265 {
 266         wcsession *WCC = WC;
 267 #ifdef SERV_TRACE
 268         lprintf(9, "%3d<%s\n", WC->serv_sock, string);
 269 #endif
 270         FlushStrBuf(WCC->ReadBuf);
 271         WCC->ReadPos = NULL;
 272
 273         serv_write(string, strlen(string));
 274         serv_write("\n", 1);
 275 }
 276
 277 /*
 278  *  send line to server
 279  *  string the line to send to the citadel server
 280  */
 281 void serv_putbuf(const StrBuf *string)
 282 {
 283         wcsession *WCC = WC;
 284 #ifdef SERV_TRACE
 285         lprintf(9, "%3d<%s\n", WC->serv_sock, ChrPtr(string));
 286 #endif
 287         FlushStrBuf(WCC->ReadBuf);
 288         WCC->ReadPos = NULL;
 289
 290         serv_write(ChrPtr(string), StrLength(string));
 291         serv_write("\n", 1);
 292 }
 293
 294
 295 /*
 296  *  convenience function to send stuff to the server
 297  *  format the formatstring
 298  *  ... the entities to insert into format
 299  */
 300 void serv_printf(const char *format,...)
 301 {
 302         wcsession *WCC = WC;
 303         va_list arg_ptr;
 304         char buf[SIZ];
 305         size_t len;
 306
 307         FlushStrBuf(WCC->ReadBuf);
 308         WCC->ReadPos = NULL;
 309
 310         va_start(arg_ptr, format);
 311         vsnprintf(buf, sizeof buf, format, arg_ptr);
 312         va_end(arg_ptr);
 313
 314         len = strlen(buf);
 315         buf[len++] = '\n';
 316         buf[len] = '\0';
 317         serv_write(buf, len);
 318 #ifdef SERV_TRACE
 319         lprintf(9, "<%s", buf);
 320 #endif
 321 }
 322
 323
 324
 325
 326 int ClientGetLine(ParsedHttpHdrs *Hdr, StrBuf *Target)
 327 {
 328         const char *Error, *pch, *pchs;
 329         int rlen, len, retval = 0;
 330
 331 #ifdef HAVE_OPENSSL
 332         if (is_https) {
 333                 int ntries = 0;
 334                 if (StrLength(Hdr->ReadBuf) > 0) {
 335                         pchs = ChrPtr(Hdr->ReadBuf);
 336                         pch = strchr(pchs, '\n');
 337                         if (pch != NULL) {
 338                                 rlen = 0;
 339                                 len = pch - pchs;
 340                                 if (len > 0 && (*(pch - 1) == '\r') )
 341                                         rlen ++;
 342                                 StrBufSub(Target, Hdr->ReadBuf, 0, len - rlen);
 343                                 StrBufCutLeft(Hdr->ReadBuf, len + 1);
 344                                 return len - rlen;
 345                         }
 346                 }
 347
 348                 while (retval == 0) {
 349                                 pch = NULL;
 350                                 pchs = ChrPtr(Hdr->ReadBuf);
 351                                 if (*pchs != '\0')
 352                                         pch = strchr(pchs, '\n');
 353                                 if (pch == NULL) {
 354                                         retval = client_read_sslbuffer(Hdr->ReadBuf, SLEEPING);
 355                                         pchs = ChrPtr(Hdr->ReadBuf);
 356                                         pch = strchr(pchs, '\n');
 357                                 }
 358                                 if (retval == 0) {
 359                                         sleeeeeeeeeep(1);
 360                                         ntries ++;
 361                                 }
 362                                 if (ntries > 10)
 363                                         return 0;
 364                 }
 365                 if ((retval > 0) && (pch != NULL)) {
 366                         rlen = 0;
 367                         len = pch - pchs;
 368                         if (len > 0 && (*(pch - 1) == '\r') )
 369                                 rlen ++;
 370                         StrBufSub(Target, Hdr->ReadBuf, 0, len - rlen);
 371                         StrBufCutLeft(Hdr->ReadBuf, len + 1);
 372                         return len - rlen;
 373
 374                 }
 375                 else
 376                         return -1;
 377         }
 378         else
 379 #endif
 380                 return StrBufTCP_read_buffered_line_fast(Target,
 381                                                          Hdr->ReadBuf,
 382                                                          &Hdr->Pos,
 383                                                          &Hdr->http_sock,
 384                                                          5,
 385                                                          1,
 386                                                          &Error);
 387 }
 388
 389 /*
 390  * This is a generic function to set up a master socket for listening on
 391  * a TCP port.  The server shuts down if the bind fails.
 392  *
 393  * ip_addr      IP address to bind
 394  * port_number  port number to bind
 395  * queue_len    number of incoming connections to allow in the queue
 396  */
 397 int ig_tcp_server(char *ip_addr, int port_number, int queue_len)
 398 {
 399         struct protoent *p;
 400         struct sockaddr_in sin;
 401         int s, i;
 402
 403         memset(&sin, 0, sizeof(sin));
 404         sin.sin_family = AF_INET;
 405         if (ip_addr == NULL) {
 406                 sin.sin_addr.s_addr = INADDR_ANY;
 407         } else {
 408                 sin.sin_addr.s_addr = inet_addr(ip_addr);
 409         }
 410
 411         if (sin.sin_addr.s_addr == INADDR_NONE) {
 412                 sin.sin_addr.s_addr = INADDR_ANY;
 413         }
 414
 415         if (port_number == 0) {
 416                 lprintf(1, "Cannot start: no port number specified.\n");
 417                 exit(WC_EXIT_BIND);
 418         }
 419         sin.sin_port = htons((u_short) port_number);
 420
 421         p = getprotobyname("tcp");
 422
 423         s = socket(PF_INET, SOCK_STREAM, (p->p_proto));
 424         if (s < 0) {
 425                 lprintf(1, "Can't create a socket: %s\n", strerror(errno));
 426                 exit(WC_EXIT_BIND);
 427         }
 428         /* Set some socket options that make sense. */
 429         i = 1;
 430         setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i));
 431
 432         #ifndef __APPLE__
 433         fcntl(s, F_SETFL, O_NONBLOCK); /* maide: this statement is incorrect
 434                                           there should be a preceding F_GETFL
 435                                           and a bitwise OR with the previous
 436                                           fd flags */
 437         #endif
 438
 439         if (bind(s, (struct sockaddr *) &sin, sizeof(sin)) < 0) {
 440                 lprintf(1, "Can't bind: %s\n", strerror(errno));
 441                 exit(WC_EXIT_BIND);
 442         }
 443         if (listen(s, queue_len) < 0) {
 444                 lprintf(1, "Can't listen: %s\n", strerror(errno));
 445                 exit(WC_EXIT_BIND);
 446         }
 447         return (s);
 448 }
 449
 450
 451
 452 /*
 453  * Create a Unix domain socket and listen on it
 454  * sockpath - file name of the unix domain socket
 455  * queue_len - Number of incoming connections to allow in the queue
 456  */
 457 int ig_uds_server(char *sockpath, int queue_len)
 458 {
 459         struct sockaddr_un addr;
 460         int s;
 461         int i;
 462         int actual_queue_len;
 463
 464         actual_queue_len = queue_len;
 465         if (actual_queue_len < 5) actual_queue_len = 5;
 466
 467         i = unlink(sockpath);
 468         if ((i != 0) && (errno != ENOENT)) {
 469                 lprintf(1, "webcit: can't unlink %s: %s\n",
 470                         sockpath, strerror(errno));
 471                 exit(WC_EXIT_BIND);
 472         }
 473
 474         memset(&addr, 0, sizeof(addr));
 475         addr.sun_family = AF_UNIX;
 476         safestrncpy(addr.sun_path, sockpath, sizeof addr.sun_path);
 477
 478         s = socket(AF_UNIX, SOCK_STREAM, 0);
 479         if (s < 0) {
 480                 lprintf(1, "webcit: Can't create a socket: %s\n",
 481                         strerror(errno));
 482                 exit(WC_EXIT_BIND);
 483         }
 484
 485         if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
 486                 lprintf(1, "webcit: Can't bind: %s\n",
 487                         strerror(errno));
 488                 exit(WC_EXIT_BIND);
 489         }
 490
 491         if (listen(s, actual_queue_len) < 0) {
 492                 lprintf(1, "webcit: Can't listen: %s\n",
 493                         strerror(errno));
 494                 exit(WC_EXIT_BIND);
 495         }
 496
 497         chmod(sockpath, 0777);
 498         return(s);
 499 }
 500
 501
 502
 503
 504 /*
 505  * Read data from the client socket.
 506  *
 507  * sock         socket fd to read from
 508  * buf          buffer to read into
 509  * bytes        number of bytes to read
 510  * timeout      Number of seconds to wait before timing out
 511  *
 512  * Possible return values:
 513  *      1       Requested number of bytes has been read.
 514  *      0       Request timed out.
 515  *      -1      Connection is broken, or other error.
 516  */
 517 int client_read_to(ParsedHttpHdrs *Hdr, StrBuf *Target, int bytes, int timeout)
 518 {
 519         const char *Error;
 520         int retval = 0;
 521
 522 #ifdef HAVE_OPENSSL
 523         if (is_https) {
 524                 long bufremain;
 525
 526                 if (Hdr->Pos == NULL)
 527                         Hdr->Pos = ChrPtr(Hdr->ReadBuf);
 528                 bufremain = StrLength(Hdr->ReadBuf) - (Hdr->Pos - ChrPtr(Hdr->ReadBuf));
 529
 530                 if (bytes < bufremain)
 531                         bufremain = bytes;
 532                 StrBufAppendBufPlain(Target, Hdr->Pos, bufremain, 0);
 533                 StrBufCutLeft(Hdr->ReadBuf, bufremain);
 534
 535                 if (bytes > bufremain)
 536                 {
 537                         while ((StrLength(Hdr->ReadBuf) + StrLength(Target) < bytes) &&
 538                                (retval >= 0))
 539                                 retval = client_read_sslbuffer(Hdr->ReadBuf, timeout);
 540                         if (retval >= 0) {
 541                                 StrBufAppendBuf(Target, Hdr->ReadBuf, 0); /* todo: Buf > bytes? */
 542 #ifdef HTTP_TRACING
 543                                 write(2, "\033[32m", 5);
 544                                 write(2, buf, bytes);
 545                                 write(2, "\033[30m", 5);
 546 #endif
 547                                 return 1;
 548                         }
 549                         else {
 550                                 lprintf(2, "client_read_ssl() failed\n");
 551                                 return -1;
 552                         }
 553                 }
 554                 else
 555                         return 1;
 556         }
 557 #endif
 558
 559         retval = StrBufReadBLOBBuffered(Target,
 560                                         Hdr->ReadBuf,
 561                                         &Hdr->Pos,
 562                                         &Hdr->http_sock,
 563                                         1,
 564                                         bytes,
 565                                         O_TERM,
 566                                         &Error);
 567         if (retval < 0) {
 568                 lprintf(2, "client_read() failed: %s\n",
 569                         Error);
 570                 return retval;
 571         }
 572
 573 #ifdef HTTP_TRACING
 574         write(2, "\033[32m", 5);
 575         write(2, buf, bytes);
 576         write(2, "\033[30m", 5);
 577 #endif
 578         return 1;
 579 }
 580
 581
 582 /*
 583  * Begin buffering HTTP output so we can transmit it all in one write operation later.
 584  */
 585 void begin_burst(void)
 586 {
 587         if (WC->WBuf == NULL) {
 588                 WC->WBuf = NewStrBufPlain(NULL, 32768);
 589         }
 590 }
 591
 592
 593 /*
 594  * Finish buffering HTTP output.  [Compress using zlib and] output with a Content-Length: header.
 595  */
 596 long end_burst(void)
 597 {
 598         wcsession *WCC = WC;
 599         const char *ptr, *eptr;
 600         long count;
 601         ssize_t res;
 602         fd_set wset;
 603         int fdflags;
 604
 605         if (!DisableGzip && (WCC->Hdr->HR.gzip_ok) && CompressBuffer(WCC->WBuf))
 606         {
 607                 hprintf("Content-encoding: gzip\r\n");
 608         }
 609
 610         if (WCC->Hdr->HR.prohibit_caching)
 611                 hprintf("Pragma: no-cache\r\nCache-Control: no-store\r\nExpires:-1\r\n");
 612         hprintf("Content-length: %d\r\n\r\n", StrLength(WCC->WBuf));
 613
 614         ptr = ChrPtr(WCC->HBuf);
 615         count = StrLength(WCC->HBuf);
 616         eptr = ptr + count;
 617
 618 #ifdef HAVE_OPENSSL
 619         if (is_https) {
 620                 client_write_ssl(WCC->HBuf);
 621                 client_write_ssl(WCC->WBuf);
 622                 return (count);
 623         }
 624 #endif
 625
 626
 627 #ifdef HTTP_TRACING
 628
 629         write(2, "\033[34m", 5);
 630         write(2, ptr, StrLength(WCC->WBuf));
 631         write(2, "\033[30m", 5);
 632 #endif
 633         fdflags = fcntl(WC->Hdr->http_sock, F_GETFL);
 634
 635         while (ptr < eptr) {
 636                 if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
 637                         FD_ZERO(&wset);
 638                         FD_SET(WCC->Hdr->http_sock, &wset);
 639                         if (select(WCC->Hdr->http_sock + 1, NULL, &wset, NULL, NULL) == -1) {
 640                                 lprintf(2, "client_write: Socket select failed (%s)\n", strerror(errno));
 641                                 return -1;
 642                         }
 643                 }
 644
 645                 if ((res = write(WCC->Hdr->http_sock,
 646                                  ptr,
 647                                  count)) == -1) {
 648                         lprintf(2, "client_write: Socket write failed (%s)\n", strerror(errno));
 649                         wc_backtrace();
 650                         return res;
 651                 }
 652                 count -= res;
 653                 ptr += res;
 654         }
 655
 656         ptr = ChrPtr(WCC->WBuf);
 657         count = StrLength(WCC->WBuf);
 658         eptr = ptr + count;
 659
 660 #ifdef HTTP_TRACING
 661
 662         write(2, "\033[34m", 5);
 663         write(2, ptr, StrLength(WCC->WBuf));
 664         write(2, "\033[30m", 5);
 665 #endif
 666
 667         while (ptr < eptr) {
 668                 if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
 669                         FD_ZERO(&wset);
 670                         FD_SET(WCC->Hdr->http_sock, &wset);
 671                         if (select(WCC->Hdr->http_sock + 1, NULL, &wset, NULL, NULL) == -1) {
 672                                 lprintf(2, "client_write: Socket select failed (%s)\n", strerror(errno));
 673                                 return -1;
 674                         }
 675                 }
 676
 677                 if ((res = write(WCC->Hdr->http_sock,
 678                                  ptr,
 679                                  count)) == -1) {
 680                         lprintf(2, "client_write: Socket write failed (%s)\n", strerror(errno));
 681                         wc_backtrace();
 682                         return res;
 683                 }
 684                 count -= res;
 685                 ptr += res;
 686         }
 687
 688         return StrLength(WCC->WBuf);
 689 }
 690
 691
 692 /*
 693  * lingering_close() a`la Apache. see
 694  * http://www.apache.org/docs/misc/fin_wait_2.html for rationale
 695  */
 696 int lingering_close(int fd)
 697 {
 698         char buf[SIZ];
 699         int i;
 700         fd_set set;
 701         struct timeval tv, start;
 702
 703         gettimeofday(&start, NULL);
 704         shutdown(fd, 1);
 705         do {
 706                 do {
 707                         gettimeofday(&tv, NULL);
 708                         tv.tv_sec = SLEEPING - (tv.tv_sec - start.tv_sec);
 709                         tv.tv_usec = start.tv_usec - tv.tv_usec;
 710                         if (tv.tv_usec < 0) {
 711                                 tv.tv_sec--;
 712                                 tv.tv_usec += 1000000;
 713                         }
 714                         FD_ZERO(&set);
 715                         FD_SET(fd, &set);
 716                         i = select(fd + 1, &set, NULL, NULL, &tv);
 717                 } while (i == -1 && errno == EINTR);
 718
 719                 if (i <= 0)
 720                         break;
 721
 722                 i = read(fd, buf, sizeof buf);
 723         } while (i != 0 && (i != -1 || errno == EINTR));
 724
 725         return close(fd);
 726 }
 727
 728 void
 729 HttpNewModule_TCPSOCKETS
 730 (ParsedHttpHdrs *httpreq)
 731 {
 732
 733         httpreq->ReadBuf = NewStrBufPlain(NULL, SIZ * 4);
 734 }
 735
 736 void
 737 HttpDetachModule_TCPSOCKETS
 738 (ParsedHttpHdrs *httpreq)
 739 {
 740
 741         FlushStrBuf(httpreq->ReadBuf);
 742         ReAdjustEmptyBuf(httpreq->ReadBuf, 4 * SIZ, SIZ);
 743 }
 744
 745 void
 746 HttpDestroyModule_TCPSOCKETS
 747 (ParsedHttpHdrs *httpreq)
 748 {
 749
 750         FreeStrBuf(&httpreq->ReadBuf);
 751 }
 752
 753
 754 void
 755 SessionNewModule_TCPSOCKETS
 756 (wcsession *sess)
 757 {
 758         sess->CLineBuf = NewStrBuf();
 759         sess->MigrateReadLineBuf = NewStrBuf();
 760 }
 761
 762 void
 763 SessionDestroyModule_TCPSOCKETS
 764 (wcsession *sess)
 765 {
 766         FreeStrBuf(&sess->CLineBuf);
 767         FreeStrBuf(&sess->ReadBuf);
 768         FreeStrBuf(&sess->MigrateReadLineBuf);
 769         if (sess->serv_sock > 0)
 770                 close(sess->serv_sock);
 771 }