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 long MaxRead = -1; /* should we do READ scattered or all at once? */
  16
  17 /*
  18  * register the timeout
  19  */
  20 RETSIGTYPE timeout(int signum)
  21 {
  22         lprintf(1, "Connection timed out; unable to reach citserver\n");
  23         /* no exit here, since we need to server the connection unreachable thing. exit(3); */
  24 }
  25
  26
  27 /*
  28  *  Connect a unix domain socket
  29  *  sockpath where to open a unix domain socket
  30  */
  31 int uds_connectsock(char *sockpath)
  32 {
  33         struct sockaddr_un addr;
  34         int s;
  35
  36         memset(&addr, 0, sizeof(addr));
  37         addr.sun_family = AF_UNIX;
  38         strncpy(addr.sun_path, sockpath, sizeof addr.sun_path);
  39
  40         s = socket(AF_UNIX, SOCK_STREAM, 0);
  41         if (s < 0) {
  42                 lprintf(1, "Can't create socket[%s]: %s\n",
  43                         sockpath,
  44                         strerror(errno));
  45                 return(-1);
  46         }
  47
  48         if (connect(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
  49                 lprintf(1, "Can't connect [%s]: %s\n",
  50                         sockpath,
  51                         strerror(errno));
  52                 close(s);
  53                 return(-1);
  54         }
  55
  56         return s;
  57 }
  58
  59
  60 /*
  61  *  Connect a TCP/IP socket
  62  *  host the host to connect to
  63  *  service the service on the host to call
  64  */
  65 int tcp_connectsock(char *host, char *service)
  66 {
  67         int fdflags;
  68         struct hostent *phe;
  69         struct servent *pse;
  70         struct protoent *ppe;
  71         struct sockaddr_in sin;
  72         int s;
  73
  74         memset(&sin, 0, sizeof(sin));
  75         sin.sin_family = AF_INET;
  76
  77         pse = getservbyname(service, "tcp");
  78         if (pse) {
  79                 sin.sin_port = pse->s_port;
  80         } else if ((sin.sin_port = htons((u_short) atoi(service))) == 0) {
  81                 lprintf(1, "Can't get %s service entry\n", service);
  82                 return (-1);
  83         }
  84         phe = gethostbyname(host);
  85         if (phe) {
  86                 memcpy(&sin.sin_addr, phe->h_addr, phe->h_length);
  87         } else if ((sin.sin_addr.s_addr = inet_addr(host)) == INADDR_NONE) {
  88                 lprintf(1, "Can't get %s host entry: %s\n",
  89                         host, strerror(errno));
  90                 return (-1);
  91         }
  92         if ((ppe = getprotobyname("tcp")) == 0) {
  93                 lprintf(1, "Can't get TCP protocol entry: %s\n",
  94                         strerror(errno));
  95                 return (-1);
  96         }
  97
  98         s = socket(PF_INET, SOCK_STREAM, ppe->p_proto);
  99         if (s < 0) {
 100                 lprintf(1, "Can't create socket: %s\n", strerror(errno));
 101                 return (-1);
 102         }
 103
 104         fdflags = fcntl(s, F_GETFL);
 105         if (fdflags < 0)
 106                 lprintf(1, "unable to get socket flags!  %s.%s: %s \n",
 107                         host, service, strerror(errno));
 108         fdflags = fdflags | O_NONBLOCK;
 109         if (fcntl(s, F_SETFD, fdflags) < 0)
 110                 lprintf(1, "unable to set socket nonblocking flags!  %s.%s: %s \n",
 111                         host, service, strerror(errno));
 112
 113         signal(SIGALRM, timeout);
 114         alarm(30);
 115
 116         if (connect(s, (struct sockaddr *) &sin, sizeof(sin)) < 0) {
 117                 lprintf(1, "Can't connect to %s.%s: %s\n",
 118                         host, service, strerror(errno));
 119                 close(s);
 120                 return (-1);
 121         }
 122         alarm(0);
 123         signal(SIGALRM, SIG_IGN);
 124         if (!is_https) {
 125                 fdflags = fcntl(s, F_GETFL);
 126                 if (fdflags < 0)
 127                         lprintf(1, "unable to get socket flags!  %s.%s: %s \n",
 128                                 host, service, strerror(errno));
 129                 fdflags = fdflags | O_NONBLOCK;
 130                 if (fcntl(s, F_SETFD, fdflags) < 0)
 131                         lprintf(1, "unable to set socket nonblocking flags!  %s.%s: %s \n",
 132                                 host, service, strerror(errno));
 133         }
 134         return (s);
 135 }
 136
 137
 138
 139 /*
 140  *  input string from pipe
 141  */
 142 int serv_getln(char *strbuf, int bufsize)
 143 {
 144         wcsession *WCC = WC;
 145         int len;
 146
 147         *strbuf = '\0';
 148         StrBuf_ServGetln(WCC->MigrateReadLineBuf);
 149         len = StrLength(WCC->MigrateReadLineBuf);
 150         if (len > bufsize)
 151                 len = bufsize - 1;
 152         memcpy(strbuf, ChrPtr(WCC->MigrateReadLineBuf), len);
 153         FlushStrBuf(WCC->MigrateReadLineBuf);
 154         strbuf[len] = '\0';
 155 #ifdef SERV_TRACE
 156         lprintf(9, "%3d<<<%s\n", WC->serv_sock, strbuf);
 157 #endif
 158         return len;
 159 }
 160
 161
 162 int StrBuf_ServGetln(StrBuf *buf)
 163 {
 164         wcsession *WCC = WC;
 165         const char *ErrStr = NULL;
 166         int rc;
 167
 168         FlushStrBuf(buf);
 169         rc = StrBufTCP_read_buffered_line_fast(buf,
 170                                                WCC->ReadBuf,
 171                                                &WCC->ReadPos,
 172                                                &WCC->serv_sock,
 173                                                5, 1,
 174                                                &ErrStr);
 175         if (rc < 0)
 176         {
 177                 lprintf(1, "Server connection broken: %s\n",
 178                         (ErrStr)?ErrStr:"");
 179                 wc_backtrace();
 180                 WCC->serv_sock = (-1);
 181                 WCC->connected = 0;
 182                 WCC->logged_in = 0;
 183         }
 184 #ifdef SERV_TRACE
 185         else
 186         {
 187                 long pos=0;
 188                 if (WCC->ReadPos != NULL)
 189                         pos = WCC->ReadPos - ChrPtr(buf);
 190                 lprintf(9, "%3d<<<[%ld]%s\n", WC->serv_sock, pos, ChrPtr(buf));
 191         }
 192 #endif
 193         return rc;
 194 }
 195
 196 int StrBuf_ServGetBLOBBuffered(StrBuf *buf, long BlobSize)
 197 {
 198         wcsession *WCC = WC;
 199         const char *ErrStr;
 200         int rc;
 201
 202         rc = StrBufReadBLOBBuffered(buf,
 203                                     WCC->ReadBuf,
 204                                     &WCC->ReadPos,
 205                                     &WCC->serv_sock,
 206                                     1,
 207                                     BlobSize,
 208                                     NNN_TERM,
 209                                     &ErrStr);
 210         if (rc < 0)
 211         {
 212                 lprintf(1, "Server connection broken: %s\n",
 213                         (ErrStr)?ErrStr:"");
 214                 wc_backtrace();
 215                 WCC->serv_sock = (-1);
 216                 WCC->connected = 0;
 217                 WCC->logged_in = 0;
 218         }
 219 #ifdef SERV_TRACE
 220         else
 221                 lprintf(9, "%3d<<<BLOB: %ld bytes\n", WC->serv_sock, StrLength(buf));
 222 #endif
 223
 224         return rc;
 225 }
 226
 227 int StrBuf_ServGetBLOB(StrBuf *buf, long BlobSize)
 228 {
 229         wcsession *WCC = WC;
 230         const char *ErrStr;
 231         int rc;
 232
 233         WCC->ReadPos = NULL;
 234         rc = StrBufReadBLOB(buf, &WCC->serv_sock, 1, BlobSize, &ErrStr);
 235         if (rc < 0)
 236         {
 237                 lprintf(1, "Server connection broken: %s\n",
 238                         (ErrStr)?ErrStr:"");
 239                 wc_backtrace();
 240                 WCC->serv_sock = (-1);
 241                 WCC->connected = 0;
 242                 WCC->logged_in = 0;
 243         }
 244 #ifdef SERV_TRACE
 245         else
 246                 lprintf(9, "%3d<<<BLOB: %ld bytes\n", WC->serv_sock, StrLength(buf));
 247 #endif
 248
 249         return rc;
 250 }
 251
 252 /*
 253  *  send binary to server
 254  *  buf the buffer to write to citadel server
 255  *  nbytes how many bytes to send to citadel server
 256  */
 257 void serv_write(const char *buf, int nbytes)
 258 {
 259         wcsession *WCC = WC;
 260         int bytes_written = 0;
 261         int retval;
 262
 263         FlushStrBuf(WCC->ReadBuf);
 264         WCC->ReadPos = NULL;
 265         while (bytes_written < nbytes) {
 266                 retval = write(WCC->serv_sock, &buf[bytes_written],
 267                                nbytes - bytes_written);
 268                 if (retval < 1) {
 269                         const char *ErrStr = strerror(errno);
 270                         lprintf(1, "Server connection broken: %s\n",
 271                                 (ErrStr)?ErrStr:"");
 272                         close(WCC->serv_sock);
 273                         WCC->serv_sock = (-1);
 274                         WCC->connected = 0;
 275                         WCC->logged_in = 0;
 276                         return;
 277                 }
 278                 bytes_written = bytes_written + retval;
 279         }
 280 }
 281
 282
 283 /*
 284  *  send line to server
 285  *  string the line to send to the citadel server
 286  */
 287 void serv_puts(const char *string)
 288 {
 289         wcsession *WCC = WC;
 290 #ifdef SERV_TRACE
 291         lprintf(9, "%3d>>>%s\n", WC->serv_sock, string);
 292 #endif
 293         FlushStrBuf(WCC->ReadBuf);
 294         WCC->ReadPos = NULL;
 295
 296         serv_write(string, strlen(string));
 297         serv_write("\n", 1);
 298 }
 299
 300 /*
 301  *  send line to server
 302  *  string the line to send to the citadel server
 303  */
 304 void serv_putbuf(const StrBuf *string)
 305 {
 306         wcsession *WCC = WC;
 307 #ifdef SERV_TRACE
 308         lprintf(9, "%3d>>>%s\n", WC->serv_sock, ChrPtr(string));
 309 #endif
 310         FlushStrBuf(WCC->ReadBuf);
 311         WCC->ReadPos = NULL;
 312
 313         serv_write(ChrPtr(string), StrLength(string));
 314         serv_write("\n", 1);
 315 }
 316
 317
 318 /*
 319  *  convenience function to send stuff to the server
 320  *  format the formatstring
 321  *  ... the entities to insert into format
 322  */
 323 void serv_printf(const char *format,...)
 324 {
 325         wcsession *WCC = WC;
 326         va_list arg_ptr;
 327         char buf[SIZ];
 328         size_t len;
 329
 330         FlushStrBuf(WCC->ReadBuf);
 331         WCC->ReadPos = NULL;
 332
 333         va_start(arg_ptr, format);
 334         vsnprintf(buf, sizeof buf, format, arg_ptr);
 335         va_end(arg_ptr);
 336
 337         len = strlen(buf);
 338         buf[len++] = '\n';
 339         buf[len] = '\0';
 340         serv_write(buf, len);
 341 #ifdef SERV_TRACE
 342         lprintf(9, ">>>%s", buf);
 343 #endif
 344 }
 345
 346
 347
 348 /**
 349  * Read binary data from server into memory using a series of
 350  * server READ commands.
 351  * \return the read content as StrBuf
 352  */
 353 int serv_read_binary(StrBuf *Ret, size_t total_len, StrBuf *Buf)
 354 {
 355         wcsession *WCC = WC;
 356         size_t bytes = 0;
 357         size_t thisblock = 0;
 358
 359         if (Ret == NULL)
 360             return -1;
 361
 362         if (MaxRead == -1)
 363         {
 364                 serv_printf("READ %d|%d", 0, total_len);
 365                 if (StrBuf_ServGetln(Buf) > 0)
 366                 {
 367                         long YetRead;
 368                         const char *ErrStr;
 369                         const char *pch;
 370                         int rc;
 371
 372                         if (GetServerStatus(Buf, NULL) == 6)
 373                         {
 374                             StrBufCutLeft(Buf, 4);
 375                             thisblock = StrTol(Buf);
 376                             if (WCC->serv_sock==-1) {
 377                                     FlushStrBuf(Ret);
 378                                     return -1;
 379                             }
 380
 381                             pch = ChrPtr(WCC->ReadBuf);
 382                             YetRead = WCC->ReadPos - pch;
 383                             if (YetRead > 0)
 384                             {
 385                                     long StillThere;
 386
 387                                     StillThere = StrLength(WCC->ReadBuf) -
 388                                             YetRead;
 389
 390                                     StrBufPlain(Ret,
 391                                                 WCC->ReadPos,
 392                                                 StillThere);
 393                                     total_len -= StillThere;
 394                             }
 395                             FlushStrBuf(WCC->ReadBuf);
 396                             WCC->ReadPos = NULL;
 397
 398                             if (total_len > 0)
 399                             {
 400                                     rc = StrBufReadBLOB(Ret,
 401                                                         &WCC->serv_sock,
 402                                                         1,
 403                                                         total_len,
 404                                                         &ErrStr);
 405                                     if (rc < 0)
 406                                     {
 407                                             lprintf(1, "Server connection broken: %s\n",
 408                                                     (ErrStr)?ErrStr:"");
 409                                             wc_backtrace();
 410                                             WCC->serv_sock = (-1);
 411                                             WCC->connected = 0;
 412                                             WCC->logged_in = 0;
 413                                             return rc;
 414                                     }
 415                                     else
 416                                             return StrLength(Ret);
 417                             }
 418                             else
 419                                     return StrLength(Ret);
 420                         }
 421                 }
 422                 else
 423                         return -1;
 424         }
 425         else while ((WCC->serv_sock!=-1) &&
 426                (bytes < total_len)) {
 427                 thisblock = MaxRead;
 428                 if ((total_len - bytes) < thisblock) {
 429                         thisblock = total_len - bytes;
 430                         if (thisblock == 0) {
 431                                 FlushStrBuf(Ret);
 432                                 return -1;
 433                         }
 434                 }
 435                 serv_printf("READ %d|%d", (int)bytes, (int)thisblock);
 436                 if (StrBuf_ServGetln(Buf) > 0)
 437                 {
 438                         if (GetServerStatus(Buf, NULL) == 6)
 439                         {
 440                             StrBufCutLeft(Buf, 4);
 441                             thisblock = StrTol(Buf);
 442                             if (WCC->serv_sock==-1) {
 443                                     FlushStrBuf(Ret);
 444                                     return -1;
 445                             }
 446                             StrBuf_ServGetBLOBBuffered(Ret, thisblock);
 447                             bytes += thisblock;
 448                     }
 449                     else {
 450                             lprintf(3, "Error: %s\n", ChrPtr(Buf) + 4);
 451                             return -1;
 452                     }
 453                 }
 454         }
 455         return StrLength(Ret);
 456 }
 457
 458
 459 int ClientGetLine(ParsedHttpHdrs *Hdr, StrBuf *Target)
 460 {
 461         const char *Error, *pch, *pchs;
 462         int rlen, len, retval = 0;
 463
 464 #ifdef HAVE_OPENSSL
 465         if (is_https) {
 466                 int ntries = 0;
 467                 if (StrLength(Hdr->ReadBuf) > 0) {
 468                         pchs = ChrPtr(Hdr->ReadBuf);
 469                         pch = strchr(pchs, '\n');
 470                         if (pch != NULL) {
 471                                 rlen = 0;
 472                                 len = pch - pchs;
 473                                 if (len > 0 && (*(pch - 1) == '\r') )
 474                                         rlen ++;
 475                                 StrBufSub(Target, Hdr->ReadBuf, 0, len - rlen);
 476                                 StrBufCutLeft(Hdr->ReadBuf, len + 1);
 477                                 return len - rlen;
 478                         }
 479                 }
 480
 481                 while (retval == 0) {
 482                                 pch = NULL;
 483                                 pchs = ChrPtr(Hdr->ReadBuf);
 484                                 if (*pchs != '\0')
 485                                         pch = strchr(pchs, '\n');
 486                                 if (pch == NULL) {
 487                                         retval = client_read_sslbuffer(Hdr->ReadBuf, SLEEPING);
 488                                         pchs = ChrPtr(Hdr->ReadBuf);
 489                                         pch = strchr(pchs, '\n');
 490                                 }
 491                                 if (retval == 0) {
 492                                         sleeeeeeeeeep(1);
 493                                         ntries ++;
 494                                 }
 495                                 if (ntries > 10)
 496                                         return 0;
 497                 }
 498                 if ((retval > 0) && (pch != NULL)) {
 499                         rlen = 0;
 500                         len = pch - pchs;
 501                         if (len > 0 && (*(pch - 1) == '\r') )
 502                                 rlen ++;
 503                         StrBufSub(Target, Hdr->ReadBuf, 0, len - rlen);
 504                         StrBufCutLeft(Hdr->ReadBuf, len + 1);
 505                         return len - rlen;
 506
 507                 }
 508                 else
 509                         return -1;
 510         }
 511         else
 512 #endif
 513                 return StrBufTCP_read_buffered_line_fast(Target,
 514                                                          Hdr->ReadBuf,
 515                                                          &Hdr->Pos,
 516                                                          &Hdr->http_sock,
 517                                                          5,
 518                                                          1,
 519                                                          &Error);
 520 }
 521
 522 /*
 523  * This is a generic function to set up a master socket for listening on
 524  * a TCP port.  The server shuts down if the bind fails.
 525  *
 526  * ip_addr      IP address to bind
 527  * port_number  port number to bind
 528  * queue_len    number of incoming connections to allow in the queue
 529  */
 530 int ig_tcp_server(char *ip_addr, int port_number, int queue_len)
 531 {
 532         struct protoent *p;
 533         struct sockaddr_in sin;
 534         int s, i;
 535
 536         memset(&sin, 0, sizeof(sin));
 537         sin.sin_family = AF_INET;
 538         if (ip_addr == NULL) {
 539                 sin.sin_addr.s_addr = INADDR_ANY;
 540         } else {
 541                 sin.sin_addr.s_addr = inet_addr(ip_addr);
 542         }
 543
 544         if (sin.sin_addr.s_addr == INADDR_NONE) {
 545                 sin.sin_addr.s_addr = INADDR_ANY;
 546         }
 547
 548         if (port_number == 0) {
 549                 lprintf(1, "Cannot start: no port number specified.\n");
 550                 return (-WC_EXIT_BIND);
 551         }
 552         sin.sin_port = htons((u_short) port_number);
 553
 554         p = getprotobyname("tcp");
 555
 556         s = socket(PF_INET, SOCK_STREAM, (p->p_proto));
 557         if (s < 0) {
 558                 lprintf(1, "Can't create a socket: %s\n", strerror(errno));
 559                 return (-WC_EXIT_BIND);
 560         }
 561         /* Set some socket options that make sense. */
 562         i = 1;
 563         setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i));
 564
 565         #ifndef __APPLE__
 566         fcntl(s, F_SETFL, O_NONBLOCK); /* maide: this statement is incorrect
 567                                           there should be a preceding F_GETFL
 568                                           and a bitwise OR with the previous
 569                                           fd flags */
 570         #endif
 571
 572         if (bind(s, (struct sockaddr *) &sin, sizeof(sin)) < 0) {
 573                 lprintf(1, "Can't bind: %s\n", strerror(errno));
 574                 return (-WC_EXIT_BIND);
 575         }
 576         if (listen(s, queue_len) < 0) {
 577                 lprintf(1, "Can't listen: %s\n", strerror(errno));
 578                 return (-WC_EXIT_BIND);
 579         }
 580         return (s);
 581 }
 582
 583
 584
 585 /*
 586  * Create a Unix domain socket and listen on it
 587  * sockpath - file name of the unix domain socket
 588  * queue_len - Number of incoming connections to allow in the queue
 589  */
 590 int ig_uds_server(char *sockpath, int queue_len)
 591 {
 592         struct sockaddr_un addr;
 593         int s;
 594         int i;
 595         int actual_queue_len;
 596
 597         actual_queue_len = queue_len;
 598         if (actual_queue_len < 5) actual_queue_len = 5;
 599
 600         i = unlink(sockpath);
 601         if ((i != 0) && (errno != ENOENT)) {
 602                 lprintf(1, "webcit: can't unlink %s: %s\n",
 603                         sockpath, strerror(errno));
 604                 return (-WC_EXIT_BIND);
 605         }
 606
 607         memset(&addr, 0, sizeof(addr));
 608         addr.sun_family = AF_UNIX;
 609         safestrncpy(addr.sun_path, sockpath, sizeof addr.sun_path);
 610
 611         s = socket(AF_UNIX, SOCK_STREAM, 0);
 612         if (s < 0) {
 613                 lprintf(1, "webcit: Can't create a socket: %s\n",
 614                         strerror(errno));
 615                 return (-WC_EXIT_BIND);
 616         }
 617
 618         if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
 619                 lprintf(1, "webcit: Can't bind: %s\n",
 620                         strerror(errno));
 621                 return (-WC_EXIT_BIND);
 622         }
 623
 624         if (listen(s, actual_queue_len) < 0) {
 625                 lprintf(1, "webcit: Can't listen: %s\n",
 626                         strerror(errno));
 627                 return (-WC_EXIT_BIND);
 628         }
 629
 630         chmod(sockpath, 0777);
 631         return(s);
 632 }
 633
 634
 635
 636
 637 /*
 638  * Read data from the client socket.
 639  *
 640  * sock         socket fd to read from
 641  * buf          buffer to read into
 642  * bytes        number of bytes to read
 643  * timeout      Number of seconds to wait before timing out
 644  *
 645  * Possible return values:
 646  *      1       Requested number of bytes has been read.
 647  *      0       Request timed out.
 648  *      -1      Connection is broken, or other error.
 649  */
 650 int client_read_to(ParsedHttpHdrs *Hdr, StrBuf *Target, int bytes, int timeout)
 651 {
 652         const char *Error;
 653         int retval = 0;
 654
 655 #ifdef HAVE_OPENSSL
 656         if (is_https) {
 657                 long bufremain;
 658                 long baselen;
 659
 660                 baselen = StrLength(Target);
 661
 662                 if (Hdr->Pos == NULL)
 663                         Hdr->Pos = ChrPtr(Hdr->ReadBuf);
 664                 bufremain = StrLength(Hdr->ReadBuf) - (Hdr->Pos - ChrPtr(Hdr->ReadBuf));
 665
 666                 if (bytes < bufremain)
 667                         bufremain = bytes;
 668                 StrBufAppendBufPlain(Target, Hdr->Pos, bufremain, 0);
 669                 StrBufCutLeft(Hdr->ReadBuf, bufremain);
 670
 671                 if (bytes > bufremain)
 672                 {
 673                         while ((StrLength(Hdr->ReadBuf) + StrLength(Target) < bytes + baselen) &&
 674                                (retval >= 0))
 675                                 retval = client_read_sslbuffer(Hdr->ReadBuf, timeout);
 676                         if (retval >= 0) {
 677                                 StrBufAppendBuf(Target, Hdr->ReadBuf, 0); /* todo: Buf > bytes? */
 678 #ifdef HTTP_TRACING
 679                                 write(2, "\033[32m", 5);
 680                                 write(2, buf, bytes);
 681                                 write(2, "\033[30m", 5);
 682 #endif
 683                                 return 1;
 684                         }
 685                         else {
 686                                 lprintf(2, "client_read_ssl() failed\n");
 687                                 return -1;
 688                         }
 689                 }
 690                 else
 691                         return 1;
 692         }
 693 #endif
 694
 695         retval = StrBufReadBLOBBuffered(Target,
 696                                         Hdr->ReadBuf,
 697                                         &Hdr->Pos,
 698                                         &Hdr->http_sock,
 699                                         1,
 700                                         bytes,
 701                                         O_TERM,
 702                                         &Error);
 703         if (retval < 0) {
 704                 lprintf(2, "client_read() failed: %s\n",
 705                         Error);
 706                 return retval;
 707         }
 708
 709 #ifdef HTTP_TRACING
 710         write(2, "\033[32m", 5);
 711         write(2, buf, bytes);
 712         write(2, "\033[30m", 5);
 713 #endif
 714         return 1;
 715 }
 716
 717
 718 /*
 719  * Begin buffering HTTP output so we can transmit it all in one write operation later.
 720  */
 721 void begin_burst(void)
 722 {
 723         if (WC->WBuf == NULL) {
 724                 WC->WBuf = NewStrBufPlain(NULL, 32768);
 725         }
 726 }
 727
 728
 729 /*
 730  * Finish buffering HTTP output.  [Compress using zlib and] output with a Content-Length: header.
 731  */
 732 long end_burst(void)
 733 {
 734         wcsession *WCC = WC;
 735         const char *ptr, *eptr;
 736         long count;
 737         ssize_t res = 0;
 738         fd_set wset;
 739         int fdflags;
 740
 741         if (!DisableGzip && (WCC->Hdr->HR.gzip_ok))
 742         {
 743                 if (CompressBuffer(WCC->WBuf) > 0)
 744                         hprintf("Content-encoding: gzip\r\n");
 745                 else {
 746                         lprintf(CTDL_ALERT, "Compression failed: %d [%s] sending uncompressed\n", errno, strerror(errno));
 747                         wc_backtrace();
 748                 }
 749         }
 750
 751         if (WCC->Hdr->HR.prohibit_caching)
 752                 hprintf("Pragma: no-cache\r\nCache-Control: no-store\r\nExpires:-1\r\n");
 753         hprintf("Content-length: %d\r\n\r\n", StrLength(WCC->WBuf));
 754
 755         ptr = ChrPtr(WCC->HBuf);
 756         count = StrLength(WCC->HBuf);
 757         eptr = ptr + count;
 758
 759 #ifdef HAVE_OPENSSL
 760         if (is_https) {
 761                 client_write_ssl(WCC->HBuf);
 762                 client_write_ssl(WCC->WBuf);
 763                 return (count);
 764         }
 765 #endif
 766
 767
 768 #ifdef HTTP_TRACING
 769
 770         write(2, "\033[34m", 5);
 771         write(2, ptr, StrLength(WCC->WBuf));
 772         write(2, "\033[30m", 5);
 773 #endif
 774         if (WCC->Hdr->http_sock == -1)
 775                 return -1;
 776         fdflags = fcntl(WC->Hdr->http_sock, F_GETFL);
 777
 778         while ((ptr < eptr) && (WCC->Hdr->http_sock != -1)){
 779                 if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
 780                         FD_ZERO(&wset);
 781                         FD_SET(WCC->Hdr->http_sock, &wset);
 782                         if (select(WCC->Hdr->http_sock + 1, NULL, &wset, NULL, NULL) == -1) {
 783                                 lprintf(2, "client_write: Socket select failed (%s)\n", strerror(errno));
 784                                 return -1;
 785                         }
 786                 }
 787
 788                 if ((WCC->Hdr->http_sock == -1) ||
 789                     (res = write(WCC->Hdr->http_sock,
 790                                  ptr,
 791                                  count)) == -1) {
 792                         lprintf(2, "client_write: Socket write failed (%s)\n", strerror(errno));
 793                         wc_backtrace();
 794                         return res;
 795                 }
 796                 count -= res;
 797                 ptr += res;
 798         }
 799
 800         ptr = ChrPtr(WCC->WBuf);
 801         count = StrLength(WCC->WBuf);
 802         eptr = ptr + count;
 803
 804 #ifdef HTTP_TRACING
 805
 806         write(2, "\033[34m", 5);
 807         write(2, ptr, StrLength(WCC->WBuf));
 808         write(2, "\033[30m", 5);
 809 #endif
 810
 811         while ((ptr < eptr) && (WCC->Hdr->http_sock != -1)) {
 812                 if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
 813                         FD_ZERO(&wset);
 814                         FD_SET(WCC->Hdr->http_sock, &wset);
 815                         if (select(WCC->Hdr->http_sock + 1, NULL, &wset, NULL, NULL) == -1) {
 816                                 lprintf(2, "client_write: Socket select failed (%s)\n", strerror(errno));
 817                                 return -1;
 818                         }
 819                 }
 820
 821                 if ((WCC->Hdr->http_sock == -1) ||
 822                     (res = write(WCC->Hdr->http_sock,
 823                                  ptr,
 824                                  count)) == -1) {
 825                         lprintf(2, "client_write: Socket write failed (%s)\n", strerror(errno));
 826                         wc_backtrace();
 827                         return res;
 828                 }
 829                 count -= res;
 830                 ptr += res;
 831         }
 832
 833         return StrLength(WCC->WBuf);
 834 }
 835
 836
 837 /*
 838  * lingering_close() a`la Apache. see
 839  * http://www.apache.org/docs/misc/fin_wait_2.html for rationale
 840  */
 841 int lingering_close(int fd)
 842 {
 843         char buf[SIZ];
 844         int i;
 845         fd_set set;
 846         struct timeval tv, start;
 847
 848         gettimeofday(&start, NULL);
 849         if (fd == -1)
 850                 return -1;
 851         shutdown(fd, 1);
 852         do {
 853                 do {
 854                         gettimeofday(&tv, NULL);
 855                         tv.tv_sec = SLEEPING - (tv.tv_sec - start.tv_sec);
 856                         tv.tv_usec = start.tv_usec - tv.tv_usec;
 857                         if (tv.tv_usec < 0) {
 858                                 tv.tv_sec--;
 859                                 tv.tv_usec += 1000000;
 860                         }
 861                         FD_ZERO(&set);
 862                         FD_SET(fd, &set);
 863                         i = select(fd + 1, &set, NULL, NULL, &tv);
 864                 } while (i == -1 && errno == EINTR);
 865
 866                 if (i <= 0)
 867                         break;
 868
 869                 i = read(fd, buf, sizeof buf);
 870         } while (i != 0 && (i != -1 || errno == EINTR));
 871
 872         return close(fd);
 873 }
 874
 875 void
 876 HttpNewModule_TCPSOCKETS
 877 (ParsedHttpHdrs *httpreq)
 878 {
 879
 880         httpreq->ReadBuf = NewStrBufPlain(NULL, SIZ * 4);
 881 }
 882
 883 void
 884 HttpDetachModule_TCPSOCKETS
 885 (ParsedHttpHdrs *httpreq)
 886 {
 887
 888         FlushStrBuf(httpreq->ReadBuf);
 889         ReAdjustEmptyBuf(httpreq->ReadBuf, 4 * SIZ, SIZ);
 890 }
 891
 892 void
 893 HttpDestroyModule_TCPSOCKETS
 894 (ParsedHttpHdrs *httpreq)
 895 {
 896
 897         FreeStrBuf(&httpreq->ReadBuf);
 898 }
 899
 900
 901 void
 902 SessionNewModule_TCPSOCKETS
 903 (wcsession *sess)
 904 {
 905         sess->CLineBuf = NewStrBuf();
 906         sess->MigrateReadLineBuf = NewStrBuf();
 907 }
 908
 909 void
 910 SessionDestroyModule_TCPSOCKETS
 911 (wcsession *sess)
 912 {
 913         FreeStrBuf(&sess->CLineBuf);
 914         FreeStrBuf(&sess->ReadBuf);
 915         sess->ReadPos = NULL;
 916         FreeStrBuf(&sess->MigrateReadLineBuf);
 917         if (sess->serv_sock > 0)
 918                 close(sess->serv_sock);
 919 }