webcit/tcp_sockets.c

   1 /*
   2  * Copyright (c) 1987-2010 by the citadel.org team
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19 /*
  20  * Uncomment this to log all communications with the Citadel server
  21 #define SERV_TRACE 1
  22  */
  23
  24
  25 #include "webcit.h"
  26 #include "webserver.h"
  27
  28 extern int DisableGzip;
  29 long MaxRead = -1; /* should we do READ scattered or all at once? */
  30
  31 /*
  32  * register the timeout
  33  */
  34 RETSIGTYPE timeout(int signum)
  35 {
  36         lprintf(1, "Connection timed out; unable to reach citserver\n");
  37         /* no exit here, since we need to server the connection unreachable thing. exit(3); */
  38 }
  39
  40
  41 /*
  42  * Client side - connect to a unix domain socket
  43  */
  44 int uds_connectsock(char *sockpath)
  45 {
  46         struct sockaddr_un addr;
  47         int s;
  48
  49         memset(&addr, 0, sizeof(addr));
  50         addr.sun_family = AF_UNIX;
  51         strncpy(addr.sun_path, sockpath, sizeof addr.sun_path);
  52
  53         s = socket(AF_UNIX, SOCK_STREAM, 0);
  54         if (s < 0) {
  55                 lprintf(1, "Can't create socket[%s]: %s\n", sockpath, strerror(errno));
  56                 return(-1);
  57         }
  58
  59         if (connect(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
  60                 lprintf(1, "Can't connect [%s]: %s\n", sockpath, strerror(errno));
  61                 close(s);
  62                 return(-1);
  63         }
  64
  65         return s;
  66 }
  67
  68
  69 /*
  70  * TCP client - connect to a host/port
  71  */
  72 int tcp_connectsock(char *host, char *service)
  73 {
  74         struct in6_addr serveraddr;
  75         struct addrinfo hints;
  76         struct addrinfo *res = NULL;
  77         struct addrinfo *ai = NULL;
  78         int rc = (-1);
  79         int s = (-1);
  80
  81         if ((host == NULL) || IsEmptyStr(host))
  82                 return (-1);
  83         if ((service == NULL) || IsEmptyStr(service))
  84                 return (-1);
  85
  86         lprintf(9, "tcp_connectsock(%s,%s)\n", host, service);
  87
  88         memset(&hints, 0x00, sizeof(hints));
  89         hints.ai_flags = AI_NUMERICSERV;
  90         hints.ai_family = AF_UNSPEC;
  91         hints.ai_socktype = SOCK_STREAM;
  92
  93         /*
  94          * Handle numeric IPv4 and IPv6 addresses
  95          */
  96         rc = inet_pton(AF_INET, host, &serveraddr);
  97         if (rc == 1) {                                          /* dotted quad */
  98                 hints.ai_family = AF_INET;
  99                 hints.ai_flags |= AI_NUMERICHOST;
 100         } else {
 101                 rc = inet_pton(AF_INET6, host, &serveraddr);
 102                 if (rc == 1) {                                  /* IPv6 address */
 103                         hints.ai_family = AF_INET6;
 104                         hints.ai_flags |= AI_NUMERICHOST;
 105                 }
 106         }
 107
 108         /* Begin the connection process */
 109
 110         rc = getaddrinfo(host, service, &hints, &res);
 111         if (rc != 0) {
 112                 lprintf(1, "%s: %s\n", host, gai_strerror(rc));
 113                 freeaddrinfo(res);
 114                 return(-1);
 115         }
 116
 117         /*
 118          * Try all available addresses until we connect to one or until we run out.
 119          */
 120         for (ai = res; ai != NULL; ai = ai->ai_next) {
 121
 122                 if (ai->ai_family == AF_INET) lprintf(9, "Trying IPv4\n");
 123                 else if (ai->ai_family == AF_INET6) lprintf(9, "Trying IPv6\n");
 124                 else lprintf(9, "This is going to fail.\n");
 125
 126                 s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
 127                 if (s < 0) {
 128                         lprintf(1, "socket() failed: %s\n", strerror(errno));
 129                         freeaddrinfo(res);
 130                         return(-1);
 131                 }
 132                 rc = connect(s, ai->ai_addr, ai->ai_addrlen);
 133                 if (rc >= 0) {
 134                         freeaddrinfo(res);
 135                         return(s);
 136                 }
 137                 else {
 138                         lprintf(1, "connect() failed: %s\n", strerror(errno));
 139                         close(s);
 140                 }
 141         }
 142         freeaddrinfo(res);
 143         return(-1);
 144 }
 145
 146
 147 /*
 148  *  input string from pipe
 149  */
 150 int serv_getln(char *strbuf, int bufsize)
 151 {
 152         wcsession *WCC = WC;
 153         int len;
 154
 155         *strbuf = '\0';
 156         StrBuf_ServGetln(WCC->MigrateReadLineBuf);
 157         len = StrLength(WCC->MigrateReadLineBuf);
 158         if (len > bufsize)
 159                 len = bufsize - 1;
 160         memcpy(strbuf, ChrPtr(WCC->MigrateReadLineBuf), len);
 161         FlushStrBuf(WCC->MigrateReadLineBuf);
 162         strbuf[len] = '\0';
 163 #ifdef SERV_TRACE
 164         lprintf(9, "%3d<<<%s\n", WC->serv_sock, strbuf);
 165 #endif
 166         return len;
 167 }
 168
 169
 170 int StrBuf_ServGetln(StrBuf *buf)
 171 {
 172         wcsession *WCC = WC;
 173         const char *ErrStr = NULL;
 174         int rc;
 175
 176         FlushStrBuf(buf);
 177         rc = StrBufTCP_read_buffered_line_fast(buf,
 178                                                WCC->ReadBuf,
 179                                                &WCC->ReadPos,
 180                                                &WCC->serv_sock,
 181                                                5, 1,
 182                                                &ErrStr);
 183         if (rc < 0)
 184         {
 185                 lprintf(1, "Server connection broken: %s\n",
 186                         (ErrStr)?ErrStr:"");
 187                 wc_backtrace();
 188                 WCC->serv_sock = (-1);
 189                 WCC->connected = 0;
 190                 WCC->logged_in = 0;
 191         }
 192 #ifdef SERV_TRACE
 193         else
 194         {
 195                 long pos = 0;
 196                 if (WCC->ReadPos != NULL)
 197                         pos = WCC->ReadPos - ChrPtr(WCC->ReadBuf);
 198                 lprintf(9, "%3d<<<[%ld]%s\n", WC->serv_sock, pos, ChrPtr(buf));
 199         }
 200 #endif
 201         return rc;
 202 }
 203
 204 int StrBuf_ServGetBLOBBuffered(StrBuf *buf, long BlobSize)
 205 {
 206         wcsession *WCC = WC;
 207         const char *ErrStr;
 208         int rc;
 209
 210         rc = StrBufReadBLOBBuffered(buf,
 211                                     WCC->ReadBuf,
 212                                     &WCC->ReadPos,
 213                                     &WCC->serv_sock,
 214                                     1,
 215                                     BlobSize,
 216                                     NNN_TERM,
 217                                     &ErrStr);
 218         if (rc < 0)
 219         {
 220                 lprintf(1, "Server connection broken: %s\n",
 221                         (ErrStr)?ErrStr:"");
 222                 wc_backtrace();
 223                 WCC->serv_sock = (-1);
 224                 WCC->connected = 0;
 225                 WCC->logged_in = 0;
 226         }
 227 #ifdef SERV_TRACE
 228         else
 229                 lprintf(9, "%3d<<<BLOB: %ld bytes\n", WC->serv_sock, StrLength(buf));
 230 #endif
 231
 232         return rc;
 233 }
 234
 235 int StrBuf_ServGetBLOB(StrBuf *buf, long BlobSize)
 236 {
 237         wcsession *WCC = WC;
 238         const char *ErrStr;
 239         int rc;
 240
 241         WCC->ReadPos = NULL;
 242         rc = StrBufReadBLOB(buf, &WCC->serv_sock, 1, BlobSize, &ErrStr);
 243         if (rc < 0)
 244         {
 245                 lprintf(1, "Server connection broken: %s\n",
 246                         (ErrStr)?ErrStr:"");
 247                 wc_backtrace();
 248                 WCC->serv_sock = (-1);
 249                 WCC->connected = 0;
 250                 WCC->logged_in = 0;
 251         }
 252 #ifdef SERV_TRACE
 253         else
 254                 lprintf(9, "%3d<<<BLOB: %ld bytes\n", WC->serv_sock, StrLength(buf));
 255 #endif
 256
 257         return rc;
 258 }
 259
 260
 261 void FlushReadBuf (void)
 262 {
 263         long len;
 264         const char *pch;
 265         const char *pche;
 266         wcsession *WCC = WC;
 267
 268         len = StrLength(WCC->ReadBuf);
 269         if ((len > 0) &&
 270             (WCC->ReadPos != NULL) &&
 271             (WCC->ReadPos != StrBufNOTNULL))
 272
 273         {
 274                 pch = ChrPtr(WCC->ReadBuf);
 275                 pche = pch + len;
 276                 if (WCC->ReadPos != pche)
 277                 {
 278                         lprintf(1, "ERROR: somebody didn't eat his soup! Remaing Chars: %d [%s]\n",
 279                                 pche - WCC->ReadPos, pche);
 280                         lprintf(1,
 281                                 "--------------------------------------------------------------------------------\n"
 282                                 "Whole buf: [%s]\n"
 283                                 "--------------------------------------------------------------------------------\n",
 284                                 pch);
 285                         AppendImportantMessage(HKEY("Suppenkasper alert! watch your webcit logfile and get connected to your favourite opensource Crew."));
 286                 }
 287         }
 288
 289         FlushStrBuf(WCC->ReadBuf);
 290         WCC->ReadPos = NULL;
 291
 292
 293 }
 294
 295
 296 /*
 297  *  send binary to server
 298  *  buf the buffer to write to citadel server
 299  *  nbytes how many bytes to send to citadel server
 300  */
 301 void serv_write(const char *buf, int nbytes)
 302 {
 303         wcsession *WCC = WC;
 304         int bytes_written = 0;
 305         int retval;
 306
 307         FlushReadBuf();
 308         while (bytes_written < nbytes) {
 309                 retval = write(WCC->serv_sock, &buf[bytes_written],
 310                                nbytes - bytes_written);
 311                 if (retval < 1) {
 312                         const char *ErrStr = strerror(errno);
 313                         lprintf(1, "Server connection broken: %s\n",
 314                                 (ErrStr)?ErrStr:"");
 315                         close(WCC->serv_sock);
 316                         WCC->serv_sock = (-1);
 317                         WCC->connected = 0;
 318                         WCC->logged_in = 0;
 319                         return;
 320                 }
 321                 bytes_written = bytes_written + retval;
 322         }
 323 }
 324
 325
 326 /*
 327  *  send line to server
 328  *  string the line to send to the citadel server
 329  */
 330 void serv_puts(const char *string)
 331 {
 332 #ifdef SERV_TRACE
 333         lprintf(9, "%3d>>>%s\n", WC->serv_sock, string);
 334 #endif
 335         FlushReadBuf();
 336
 337         serv_write(string, strlen(string));
 338         serv_write("\n", 1);
 339 }
 340
 341 /*
 342  *  send line to server
 343  *  string the line to send to the citadel server
 344  */
 345 void serv_putbuf(const StrBuf *string)
 346 {
 347 #ifdef SERV_TRACE
 348         lprintf(9, "%3d>>>%s\n", WC->serv_sock, ChrPtr(string));
 349 #endif
 350         FlushReadBuf();
 351
 352         serv_write(ChrPtr(string), StrLength(string));
 353         serv_write("\n", 1);
 354 }
 355
 356
 357 /*
 358  *  convenience function to send stuff to the server
 359  *  format the formatstring
 360  *  ... the entities to insert into format
 361  */
 362 void serv_printf(const char *format,...)
 363 {
 364         va_list arg_ptr;
 365         char buf[SIZ];
 366         size_t len;
 367
 368         FlushReadBuf();
 369
 370         va_start(arg_ptr, format);
 371         vsnprintf(buf, sizeof buf, format, arg_ptr);
 372         va_end(arg_ptr);
 373
 374         len = strlen(buf);
 375         buf[len++] = '\n';
 376         buf[len] = '\0';
 377         serv_write(buf, len);
 378 #ifdef SERV_TRACE
 379         lprintf(9, ">>>%s", buf);
 380 #endif
 381 }
 382
 383
 384
 385 /**
 386  * Read binary data from server into memory using a series of
 387  * server READ commands.
 388  * \return the read content as StrBuf
 389  */
 390 int serv_read_binary(StrBuf *Ret, size_t total_len, StrBuf *Buf)
 391 {
 392         wcsession *WCC = WC;
 393         size_t bytes = 0;
 394         size_t thisblock = 0;
 395
 396         if (Ret == NULL)
 397             return -1;
 398
 399         if (MaxRead == -1)
 400         {
 401                 serv_printf("READ %d|"SIZE_T_FMT, 0, total_len);
 402                 if (StrBuf_ServGetln(Buf) > 0)
 403                 {
 404                         long YetRead;
 405                         const char *ErrStr;
 406                         const char *pch;
 407                         int rc;
 408
 409                         if (GetServerStatus(Buf, NULL) == 6)
 410                         {
 411                             StrBufCutLeft(Buf, 4);
 412                             thisblock = StrTol(Buf);
 413                             if (WCC->serv_sock==-1) {
 414                                     FlushStrBuf(Ret);
 415                                     return -1;
 416                             }
 417
 418                             if (WCC->ReadPos != NULL) {
 419                                     pch = ChrPtr(WCC->ReadBuf);
 420
 421                                     YetRead = WCC->ReadPos - pch;
 422                                     if (YetRead > 0)
 423                                     {
 424                                             long StillThere;
 425
 426                                             StillThere = StrLength(WCC->ReadBuf) -
 427                                                     YetRead;
 428
 429                                             StrBufPlain(Ret,
 430                                                         WCC->ReadPos,
 431                                                         StillThere);
 432                                             total_len -= StillThere;
 433                                     }
 434                                     FlushStrBuf(WCC->ReadBuf);
 435                                     WCC->ReadPos = NULL;
 436                             }
 437                             if (total_len > 0)
 438                             {
 439                                     rc = StrBufReadBLOB(Ret,
 440                                                         &WCC->serv_sock,
 441                                                         1,
 442                                                         total_len,
 443                                                         &ErrStr);
 444                                     if (rc < 0)
 445                                     {
 446                                             lprintf(1, "Server connection broken: %s\n",
 447                                                     (ErrStr)?ErrStr:"");
 448                                             wc_backtrace();
 449                                             WCC->serv_sock = (-1);
 450                                             WCC->connected = 0;
 451                                             WCC->logged_in = 0;
 452                                             return rc;
 453                                     }
 454                                     else
 455                                             return StrLength(Ret);
 456                             }
 457                             else
 458                                     return StrLength(Ret);
 459                         }
 460                 }
 461                 else
 462                         return -1;
 463         }
 464         else while ((WCC->serv_sock!=-1) &&
 465                (bytes < total_len)) {
 466                 thisblock = MaxRead;
 467                 if ((total_len - bytes) < thisblock) {
 468                         thisblock = total_len - bytes;
 469                         if (thisblock == 0) {
 470                                 FlushStrBuf(Ret);
 471                                 return -1;
 472                         }
 473                 }
 474                 serv_printf("READ %d|%d", (int)bytes, (int)thisblock);
 475                 if (StrBuf_ServGetln(Buf) > 0)
 476                 {
 477                         if (GetServerStatus(Buf, NULL) == 6)
 478                         {
 479                             StrBufCutLeft(Buf, 4);
 480                             thisblock = StrTol(Buf);
 481                             if (WCC->serv_sock==-1) {
 482                                     FlushStrBuf(Ret);
 483                                     return -1;
 484                             }
 485                             StrBuf_ServGetBLOBBuffered(Ret, thisblock);
 486                             bytes += thisblock;
 487                     }
 488                     else {
 489                             lprintf(3, "Error: %s\n", ChrPtr(Buf) + 4);
 490                             return -1;
 491                     }
 492                 }
 493         }
 494         return StrLength(Ret);
 495 }
 496
 497
 498 int ClientGetLine(ParsedHttpHdrs *Hdr, StrBuf *Target)
 499 {
 500         const char *Error;
 501 #ifdef HAVE_OPENSSL
 502         const char *pch, *pchs;
 503         int rlen, len, retval = 0;
 504
 505         if (is_https) {
 506                 int ntries = 0;
 507                 if (StrLength(Hdr->ReadBuf) > 0) {
 508                         pchs = ChrPtr(Hdr->ReadBuf);
 509                         pch = strchr(pchs, '\n');
 510                         if (pch != NULL) {
 511                                 rlen = 0;
 512                                 len = pch - pchs;
 513                                 if (len > 0 && (*(pch - 1) == '\r') )
 514                                         rlen ++;
 515                                 StrBufSub(Target, Hdr->ReadBuf, 0, len - rlen);
 516                                 StrBufCutLeft(Hdr->ReadBuf, len + 1);
 517                                 return len - rlen;
 518                         }
 519                 }
 520
 521                 while (retval == 0) {
 522                                 pch = NULL;
 523                                 pchs = ChrPtr(Hdr->ReadBuf);
 524                                 if (*pchs != '\0')
 525                                         pch = strchr(pchs, '\n');
 526                                 if (pch == NULL) {
 527                                         retval = client_read_sslbuffer(Hdr->ReadBuf, SLEEPING);
 528                                         pchs = ChrPtr(Hdr->ReadBuf);
 529                                         pch = strchr(pchs, '\n');
 530                                 }
 531                                 if (retval == 0) {
 532                                         sleeeeeeeeeep(1);
 533                                         ntries ++;
 534                                 }
 535                                 if (ntries > 10)
 536                                         return 0;
 537                 }
 538                 if ((retval > 0) && (pch != NULL)) {
 539                         rlen = 0;
 540                         len = pch - pchs;
 541                         if (len > 0 && (*(pch - 1) == '\r') )
 542                                 rlen ++;
 543                         StrBufSub(Target, Hdr->ReadBuf, 0, len - rlen);
 544                         StrBufCutLeft(Hdr->ReadBuf, len + 1);
 545                         return len - rlen;
 546
 547                 }
 548                 else
 549                         return -1;
 550         }
 551         else
 552 #endif
 553                 return StrBufTCP_read_buffered_line_fast(Target,
 554                                                          Hdr->ReadBuf,
 555                                                          &Hdr->Pos,
 556                                                          &Hdr->http_sock,
 557                                                          5,
 558                                                          1,
 559                                                          &Error);
 560 }
 561
 562
 563 /*
 564  * This is a generic function to set up a master socket for listening on
 565  * a TCP port.  The server shuts down if the bind fails.  (IPv4/IPv6 version)
 566  *
 567  * ip_addr      IP address to bind
 568  * port_number  port number to bind
 569  * queue_len    number of incoming connections to allow in the queue
 570  */
 571 int webcit_tcp_server(char *ip_addr, int port_number, int queue_len)
 572 {
 573         struct protoent *p;
 574         struct sockaddr_in6 sin6;
 575         struct sockaddr_in sin4;
 576         int s, i, b;
 577         int ip_version = 6;
 578
 579         memset(&sin6, 0, sizeof(sin6));
 580         memset(&sin4, 0, sizeof(sin4));
 581         sin6.sin6_family = AF_INET6;
 582         sin4.sin_family = AF_INET;
 583
 584         if (    (ip_addr == NULL)                                                       /* any IPv6 */
 585                 || (IsEmptyStr(ip_addr))
 586                 || (!strcmp(ip_addr, "*"))
 587         ) {
 588                 ip_version = 6;
 589                 sin6.sin6_addr = in6addr_any;
 590         }
 591         else if (!strcmp(ip_addr, "0.0.0.0"))                                           /* any IPv4 */
 592         {
 593                 ip_version = 4;
 594                 sin4.sin_addr.s_addr = INADDR_ANY;
 595         }
 596         else if ((strchr(ip_addr, '.')) && (!strchr(ip_addr, ':')))                     /* specific IPv4 */
 597         {
 598                 ip_version = 4;
 599                 if (inet_pton(AF_INET, ip_addr, &sin4.sin_addr) <= 0) {
 600                         lprintf(1, "Error binding to [%s] : %s\n", ip_addr, strerror(errno));
 601                         return (-WC_EXIT_BIND);
 602                 }
 603         }
 604         else                                                                            /* specific IPv6 */
 605         {
 606                 ip_version = 6;
 607                 if (inet_pton(AF_INET6, ip_addr, &sin6.sin6_addr) <= 0) {
 608                         lprintf(1, "Error binding to [%s] : %s\n", ip_addr, strerror(errno));
 609                         return (-WC_EXIT_BIND);
 610                 }
 611         }
 612
 613         if (port_number == 0) {
 614                 lprintf(1, "Cannot start: no port number specified.\n");
 615                 return (-WC_EXIT_BIND);
 616         }
 617         sin6.sin6_port = htons((u_short) port_number);
 618         sin4.sin_port = htons((u_short) port_number);
 619
 620         p = getprotobyname("tcp");
 621
 622         s = socket( ((ip_version == 6) ? PF_INET6 : PF_INET), SOCK_STREAM, (p->p_proto));
 623         if (s < 0) {
 624                 lprintf(1, "Can't create a listening socket: %s\n", strerror(errno));
 625                 return (-WC_EXIT_BIND);
 626         }
 627         /* Set some socket options that make sense. */
 628         i = 1;
 629         setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i));
 630
 631         if (ip_version == 6) {
 632                 b = bind(s, (struct sockaddr *) &sin6, sizeof(sin6));
 633         }
 634         else {
 635                 b = bind(s, (struct sockaddr *) &sin4, sizeof(sin4));
 636         }
 637
 638         if (b < 0) {
 639                 lprintf(1, "Can't bind: %s\n", strerror(errno));
 640                 return (-WC_EXIT_BIND);
 641         }
 642
 643         if (listen(s, queue_len) < 0) {
 644                 lprintf(1, "Can't listen: %s\n", strerror(errno));
 645                 return (-WC_EXIT_BIND);
 646         }
 647         return (s);
 648 }
 649
 650
 651 /*
 652  * Create a Unix domain socket and listen on it
 653  * sockpath - file name of the unix domain socket
 654  * queue_len - Number of incoming connections to allow in the queue
 655  */
 656 int webcit_uds_server(char *sockpath, int queue_len)
 657 {
 658         struct sockaddr_un addr;
 659         int s;
 660         int i;
 661         int actual_queue_len;
 662
 663         actual_queue_len = queue_len;
 664         if (actual_queue_len < 5) actual_queue_len = 5;
 665
 666         i = unlink(sockpath);
 667         if ((i != 0) && (errno != ENOENT)) {
 668                 lprintf(1, "webcit: can't unlink %s: %s\n",
 669                         sockpath, strerror(errno));
 670                 return (-WC_EXIT_BIND);
 671         }
 672
 673         memset(&addr, 0, sizeof(addr));
 674         addr.sun_family = AF_UNIX;
 675         safestrncpy(addr.sun_path, sockpath, sizeof addr.sun_path);
 676
 677         s = socket(AF_UNIX, SOCK_STREAM, 0);
 678         if (s < 0) {
 679                 lprintf(1, "webcit: Can't create a unix domain socket: %s\n", strerror(errno));
 680                 return (-WC_EXIT_BIND);
 681         }
 682
 683         if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
 684                 lprintf(1, "webcit: Can't bind: %s\n",
 685                         strerror(errno));
 686                 return (-WC_EXIT_BIND);
 687         }
 688
 689         if (listen(s, actual_queue_len) < 0) {
 690                 lprintf(1, "webcit: Can't listen: %s\n",
 691                         strerror(errno));
 692                 return (-WC_EXIT_BIND);
 693         }
 694
 695         chmod(sockpath, 0777);
 696         return(s);
 697 }
 698
 699
 700
 701
 702 /*
 703  * Read data from the client socket.
 704  *
 705  * sock         socket fd to read from
 706  * buf          buffer to read into
 707  * bytes        number of bytes to read
 708  * timeout      Number of seconds to wait before timing out
 709  *
 710  * Possible return values:
 711  *      1       Requested number of bytes has been read.
 712  *      0       Request timed out.
 713  *      -1      Connection is broken, or other error.
 714  */
 715 int client_read_to(ParsedHttpHdrs *Hdr, StrBuf *Target, int bytes, int timeout)
 716 {
 717         const char *Error;
 718         int retval = 0;
 719
 720 #ifdef HAVE_OPENSSL
 721         if (is_https) {
 722                 long bufremain;
 723                 long baselen;
 724
 725                 baselen = StrLength(Target);
 726
 727                 if (Hdr->Pos == NULL)
 728                         Hdr->Pos = ChrPtr(Hdr->ReadBuf);
 729                 bufremain = StrLength(Hdr->ReadBuf) - (Hdr->Pos - ChrPtr(Hdr->ReadBuf));
 730
 731                 if (bytes < bufremain)
 732                         bufremain = bytes;
 733                 StrBufAppendBufPlain(Target, Hdr->Pos, bufremain, 0);
 734                 StrBufCutLeft(Hdr->ReadBuf, bufremain);
 735
 736                 if (bytes > bufremain)
 737                 {
 738                         while ((StrLength(Hdr->ReadBuf) + StrLength(Target) < bytes + baselen) &&
 739                                (retval >= 0))
 740                                 retval = client_read_sslbuffer(Hdr->ReadBuf, timeout);
 741                         if (retval >= 0) {
 742                                 StrBufAppendBuf(Target, Hdr->ReadBuf, 0); /* todo: Buf > bytes? */
 743 #ifdef HTTP_TRACING
 744                                 write(2, "\033[32m", 5);
 745                                 write(2, buf, bytes);
 746                                 write(2, "\033[30m", 5);
 747 #endif
 748                                 return 1;
 749                         }
 750                         else {
 751                                 lprintf(2, "client_read_ssl() failed\n");
 752                                 return -1;
 753                         }
 754                 }
 755                 else
 756                         return 1;
 757         }
 758 #endif
 759
 760         retval = StrBufReadBLOBBuffered(Target,
 761                                         Hdr->ReadBuf,
 762                                         &Hdr->Pos,
 763                                         &Hdr->http_sock,
 764                                         1,
 765                                         bytes,
 766                                         O_TERM,
 767                                         &Error);
 768         if (retval < 0) {
 769                 lprintf(2, "client_read() failed: %s\n",
 770                         Error);
 771                 wc_backtrace();
 772                 return retval;
 773         }
 774
 775 #ifdef HTTP_TRACING
 776         write(2, "\033[32m", 5);
 777         write(2, buf, bytes);
 778         write(2, "\033[30m", 5);
 779 #endif
 780         return 1;
 781 }
 782
 783
 784 /*
 785  * Begin buffering HTTP output so we can transmit it all in one write operation later.
 786  */
 787 void begin_burst(void)
 788 {
 789         if (WC->WBuf == NULL) {
 790                 WC->WBuf = NewStrBufPlain(NULL, 32768);
 791         }
 792 }
 793
 794
 795 /*
 796  * Finish buffering HTTP output.  [Compress using zlib and] output with a Content-Length: header.
 797  */
 798 long end_burst(void)
 799 {
 800         wcsession *WCC = WC;
 801         const char *ptr, *eptr;
 802         long count;
 803         ssize_t res = 0;
 804         fd_set wset;
 805         int fdflags;
 806
 807         if (!DisableGzip && (WCC->Hdr->HR.gzip_ok))
 808         {
 809                 if (CompressBuffer(WCC->WBuf) > 0)
 810                         hprintf("Content-encoding: gzip\r\n");
 811                 else {
 812                         lprintf(CTDL_ALERT, "Compression failed: %d [%s] sending uncompressed\n", errno, strerror(errno));
 813                         wc_backtrace();
 814                 }
 815         }
 816
 817         if (WCC->WFBuf != NULL) {
 818                 WildFireSerializePayload(WCC->WFBuf, WCC->HBuf, &WCC->Hdr->nWildfireHeaders, NULL);
 819                 FreeStrBuf(&WCC->WFBuf);
 820         }
 821
 822         if (WCC->Hdr->HR.prohibit_caching)
 823                 hprintf("Pragma: no-cache\r\nCache-Control: no-store\r\nExpires:-1\r\n");
 824         hprintf("Content-length: %d\r\n\r\n", StrLength(WCC->WBuf));
 825
 826         ptr = ChrPtr(WCC->HBuf);
 827         count = StrLength(WCC->HBuf);
 828         eptr = ptr + count;
 829
 830 #ifdef HAVE_OPENSSL
 831         if (is_https) {
 832                 client_write_ssl(WCC->HBuf);
 833                 client_write_ssl(WCC->WBuf);
 834                 return (count);
 835         }
 836 #endif
 837
 838
 839 #ifdef HTTP_TRACING
 840
 841         write(2, "\033[34m", 5);
 842         write(2, ptr, StrLength(WCC->WBuf));
 843         write(2, "\033[30m", 5);
 844 #endif
 845         if (WCC->Hdr->http_sock == -1)
 846                 return -1;
 847         fdflags = fcntl(WC->Hdr->http_sock, F_GETFL);
 848
 849         while ((ptr < eptr) && (WCC->Hdr->http_sock != -1)){
 850                 if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
 851                         FD_ZERO(&wset);
 852                         FD_SET(WCC->Hdr->http_sock, &wset);
 853                         if (select(WCC->Hdr->http_sock + 1, NULL, &wset, NULL, NULL) == -1) {
 854                                 lprintf(2, "client_write: Socket select failed (%s)\n", strerror(errno));
 855                                 return -1;
 856                         }
 857                 }
 858
 859                 if ((WCC->Hdr->http_sock == -1) ||
 860                     (res = write(WCC->Hdr->http_sock,
 861                                  ptr,
 862                                  count)) == -1) {
 863                         lprintf(2, "client_write: Socket write failed (%s)\n", strerror(errno));
 864                         wc_backtrace();
 865                         return res;
 866                 }
 867                 count -= res;
 868                 ptr += res;
 869         }
 870
 871         ptr = ChrPtr(WCC->WBuf);
 872         count = StrLength(WCC->WBuf);
 873         eptr = ptr + count;
 874
 875 #ifdef HTTP_TRACING
 876
 877         write(2, "\033[34m", 5);
 878         write(2, ptr, StrLength(WCC->WBuf));
 879         write(2, "\033[30m", 5);
 880 #endif
 881
 882         while ((ptr < eptr) && (WCC->Hdr->http_sock != -1)) {
 883                 if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
 884                         FD_ZERO(&wset);
 885                         FD_SET(WCC->Hdr->http_sock, &wset);
 886                         if (select(WCC->Hdr->http_sock + 1, NULL, &wset, NULL, NULL) == -1) {
 887                                 lprintf(2, "client_write: Socket select failed (%s)\n", strerror(errno));
 888                                 return -1;
 889                         }
 890                 }
 891
 892                 if ((WCC->Hdr->http_sock == -1) ||
 893                     (res = write(WCC->Hdr->http_sock,
 894                                  ptr,
 895                                  count)) == -1) {
 896                         lprintf(2, "client_write: Socket write failed (%s)\n", strerror(errno));
 897                         wc_backtrace();
 898                         return res;
 899                 }
 900                 count -= res;
 901                 ptr += res;
 902         }
 903
 904         return StrLength(WCC->WBuf);
 905 }
 906
 907
 908 /*
 909  * lingering_close() a`la Apache. see
 910  * http://www.apache.org/docs/misc/fin_wait_2.html for rationale
 911  */
 912 int lingering_close(int fd)
 913 {
 914         char buf[SIZ];
 915         int i;
 916         fd_set set;
 917         struct timeval tv, start;
 918
 919         gettimeofday(&start, NULL);
 920         if (fd == -1)
 921                 return -1;
 922         shutdown(fd, 1);
 923         do {
 924                 do {
 925                         gettimeofday(&tv, NULL);
 926                         tv.tv_sec = SLEEPING - (tv.tv_sec - start.tv_sec);
 927                         tv.tv_usec = start.tv_usec - tv.tv_usec;
 928                         if (tv.tv_usec < 0) {
 929                                 tv.tv_sec--;
 930                                 tv.tv_usec += 1000000;
 931                         }
 932                         FD_ZERO(&set);
 933                         FD_SET(fd, &set);
 934                         i = select(fd + 1, &set, NULL, NULL, &tv);
 935                 } while (i == -1 && errno == EINTR);
 936
 937                 if (i <= 0)
 938                         break;
 939
 940                 i = read(fd, buf, sizeof buf);
 941         } while (i != 0 && (i != -1 || errno == EINTR));
 942
 943         return close(fd);
 944 }
 945
 946 void
 947 HttpNewModule_TCPSOCKETS
 948 (ParsedHttpHdrs *httpreq)
 949 {
 950
 951         httpreq->ReadBuf = NewStrBufPlain(NULL, SIZ * 4);
 952 }
 953
 954 void
 955 HttpDetachModule_TCPSOCKETS
 956 (ParsedHttpHdrs *httpreq)
 957 {
 958
 959         FlushStrBuf(httpreq->ReadBuf);
 960         ReAdjustEmptyBuf(httpreq->ReadBuf, 4 * SIZ, SIZ);
 961 }
 962
 963 void
 964 HttpDestroyModule_TCPSOCKETS
 965 (ParsedHttpHdrs *httpreq)
 966 {
 967
 968         FreeStrBuf(&httpreq->ReadBuf);
 969 }
 970
 971
 972 void
 973 SessionNewModule_TCPSOCKETS
 974 (wcsession *sess)
 975 {
 976         sess->CLineBuf = NewStrBuf();
 977         sess->MigrateReadLineBuf = NewStrBuf();
 978 }
 979
 980 void
 981 SessionDestroyModule_TCPSOCKETS
 982 (wcsession *sess)
 983 {
 984         FreeStrBuf(&sess->CLineBuf);
 985         FreeStrBuf(&sess->ReadBuf);
 986         sess->ReadPos = NULL;
 987         FreeStrBuf(&sess->MigrateReadLineBuf);
 988         if (sess->serv_sock > 0)
 989                 close(sess->serv_sock);
 990 }