webcit/webserver.c

   1 /*
   2  * This contains a simple multithreaded TCP server manager.  It sits around
   3  * waiting on the specified port for incoming HTTP connections.  When a
   4  * connection is established, it calls context_loop() from context_loop.c.
   5  *
   6  * Copyright (c) 1996-2010 by the citadel.org developers.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 3 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  */
  22
  23 #include "webcit.h"
  24 #include "webserver.h"
  25
  26 #include "modules_init.h"
  27 #ifndef HAVE_SNPRINTF
  28 int vsnprintf(char *buf, size_t max, const char *fmt, va_list argp);
  29 #endif
  30
  31
  32 extern int msock;                       /* master listening socket */
  33 extern int verbosity;           /* Logging level */
  34 extern char static_icon_dir[PATH_MAX];          /* where should we find our mime icons */
  35 extern long MaxRead;
  36 int is_https = 0;               /* Nonzero if I am an HTTPS service */
  37 int follow_xff = 0;             /* Follow X-Forwarded-For: header */
  38 int home_specified = 0;         /* did the user specify a homedir? */
  39 int DisableGzip = 0;
  40 StrBuf *site_prefix = NULL;
  41 extern pthread_mutex_t SessionListMutex;
  42 extern pthread_key_t MyConKey;
  43
  44 extern void *housekeeping_loop(void);
  45 extern int webcit_tcp_server(char *ip_addr, int port_number, int queue_len);
  46 extern int webcit_uds_server(char *sockpath, int queue_len);
  47 extern void graceful_shutdown_watcher(int signum);
  48 extern void graceful_shutdown(int signum);
  49 extern void start_daemon(char *pid_file);
  50 extern void webcit_calc_dirs_n_files(int relh, const char *basedir, int home, char *webcitdir, char *relhome);
  51
  52 extern void drop_root(uid_t UID);
  53
  54 char socket_dir[PATH_MAX];                      /* where to talk to our citadel server */
  55
  56 char *server_cookie = NULL;     /* our Cookie connection to the client */
  57 int http_port = PORT_NUM;       /* Port to listen on */
  58 char *ctdlhost = DEFAULT_HOST;  /* our name */
  59 char *ctdlport = DEFAULT_PORT;  /* our Port */
  60 int setup_wizard = 0;           /* should we run the setup wizard? \todo */
  61 char wizard_filename[PATH_MAX]; /* where's the setup wizard? */
  62 int running_as_daemon = 0;      /* should we deamonize on startup? */
  63
  64
  65
  66 /* #define DBG_PRINNT_HOOKS_AT_START */
  67 #ifdef DBG_PRINNT_HOOKS_AT_START
  68 extern HashList *HandlerHash;
  69 const char foobuf[32];
  70 const char *nix(void *vptr) {snprintf(foobuf, 32, "%0x", (long) vptr); return foobuf;}
  71 #endif
  72 extern int dbg_analyze_msg;
  73 extern int dbg_backtrace_template_errors;
  74 extern int DumpTemplateI18NStrings;
  75 extern StrBuf *I18nDump;
  76 void InitTemplateCache(void);
  77 extern int LoadTemplates;
  78
  79
  80
  81
  82 /*
  83  * Here's where it all begins.
  84  */
  85 int main(int argc, char **argv)
  86 {
  87         uid_t UID = -1;
  88         size_t basesize = 2;            /* how big should strbufs be on creation? */
  89         pthread_t SessThread;           /* Thread descriptor */
  90         pthread_attr_t attr;            /* Thread attributes */
  91         int a;                          /* General-purpose variable */
  92         char tracefile[PATH_MAX];
  93         char ip_addr[256]="*";
  94         int relh=0;
  95         int home=0;
  96         int home_specified=0;
  97         char relhome[PATH_MAX]="";
  98         char webcitdir[PATH_MAX] = DATADIR;
  99         char *pidfile = NULL;
 100         char *hdir;
 101         const char *basedir = NULL;
 102         char uds_listen_path[PATH_MAX]; /* listen on a unix domain socket? */
 103         const char *I18nDumpFile = NULL;
 104         FILE *rvfp = NULL;
 105         int rv = 0;
 106
 107         WildFireInitBacktrace(argv[0], 2);
 108
 109         start_modules ();
 110
 111 #ifdef DBG_PRINNT_HOOKS_AT_START
 112 /*      dbg_PrintHash(HandlerHash, nix, NULL);*/
 113 #endif
 114
 115         /* Ensure that we are linked to the correct version of libcitadel */
 116         if (libcitadel_version_number() < LIBCITADEL_VERSION_NUMBER) {
 117                 fprintf(stderr, " You are running libcitadel version %d.%02d\n",
 118                         (libcitadel_version_number() / 100), (libcitadel_version_number() % 100));
 119                 fprintf(stderr, "WebCit was compiled against version %d.%02d\n",
 120                         (LIBCITADEL_VERSION_NUMBER / 100), (LIBCITADEL_VERSION_NUMBER % 100));
 121                 return(1);
 122         }
 123
 124         strcpy(uds_listen_path, "");
 125
 126         /* Parse command line */
 127 #ifdef HAVE_OPENSSL
 128         while ((a = getopt(argc, argv, "R:u:h:i:p:t:T:B:x:dD:G:cfsS:Z")) != EOF)
 129 #else
 130         while ((a = getopt(argc, argv, "R:u:h:i:p:t:T:B:x:dD:G:cfZ")) != EOF)
 131 #endif
 132                 switch (a) {
 133                 case 'u':
 134                         UID = atol(optarg);
 135                         break;
 136                 case 'h':
 137                         hdir = strdup(optarg);
 138                         relh=hdir[0]!='/';
 139                         if (!relh) {
 140                                 safestrncpy(webcitdir, hdir, sizeof webcitdir);
 141                         }
 142                         else {
 143                                 safestrncpy(relhome, relhome, sizeof relhome);
 144                         }
 145                         /* free(hdir); TODO: SHOULD WE DO THIS? */
 146                         home_specified = 1;
 147                         home=1;
 148                         break;
 149                 case 'd':
 150                         running_as_daemon = 1;
 151                         break;
 152                 case 'D':
 153                         pidfile = strdup(optarg);
 154                         running_as_daemon = 1;
 155                         break;
 156                 case 'B': /* Basesize */
 157                         basesize = atoi(optarg);
 158                         if (basesize > 2)
 159                                 StartLibCitadel(basesize);
 160                         break;
 161                 case 'i':
 162                         safestrncpy(ip_addr, optarg, sizeof ip_addr);
 163                         break;
 164                 case 'p':
 165                         http_port = atoi(optarg);
 166                         if (http_port == 0) {
 167                                 safestrncpy(uds_listen_path, optarg, sizeof uds_listen_path);
 168                         }
 169                         break;
 170                 case 't':
 171                         safestrncpy(tracefile, optarg, sizeof tracefile);
 172                         rvfp = freopen(tracefile, "w", stdout);
 173                         rvfp = freopen(tracefile, "w", stderr);
 174                         rvfp = freopen(tracefile, "r", stdin);
 175                         break;
 176                 case 'T':
 177                         LoadTemplates = atoi(optarg);
 178                         dbg_analyze_msg = (LoadTemplates && (1<<1)) != 0;
 179                         dbg_backtrace_template_errors = (LoadTemplates && (1<<2)) != 0;
 180                         break;
 181                 case 'Z':
 182                         DisableGzip = 1;
 183                         break;
 184                 case 'x':
 185                         verbosity = atoi(optarg);
 186                         break;
 187                 case 'f':
 188                         follow_xff = 1;
 189                         break;
 190                 case 'c':
 191                         server_cookie = malloc(256);
 192                         if (server_cookie != NULL) {
 193                                 safestrncpy(server_cookie,
 194                                        "Set-cookie: wcserver=",
 195                                         256);
 196                                 if (gethostname
 197                                     (&server_cookie[strlen(server_cookie)],
 198                                      200) != 0) {
 199                                         lprintf(2, "gethostname: %s\n",
 200                                                 strerror(errno));
 201                                         free(server_cookie);
 202                                 }
 203                         }
 204                         break;
 205 #ifdef HAVE_OPENSSL
 206                 case 's':
 207                         is_https = 1;
 208                         break;
 209                 case 'S':
 210                         is_https = 1;
 211                         ssl_cipher_list = strdup(optarg);
 212                         break;
 213 #endif
 214                 case 'G':
 215                         DumpTemplateI18NStrings = 1;
 216                         I18nDump = NewStrBufPlain(HKEY("int templatestrings(void)\n{\n"));
 217                         I18nDumpFile = optarg;
 218                         break;
 219                 case 'R':
 220                         MaxRead = atol(optarg);
 221                         break;
 222                 default:
 223                         fprintf(stderr, "usage: webcit "
 224                                 "[-i ip_addr] [-p http_port] "
 225                                 "[-t tracefile] [-c] [-f] "
 226                                 "[-T Templatedebuglevel] "
 227                                 "[-d] [-Z] [-G i18ndumpfile] "
 228 #ifdef HAVE_OPENSSL
 229                                 "[-s] [-S cipher_suites]"
 230 #endif
 231                                 "[remotehost [remoteport]]\n");
 232                         return 1;
 233                 }
 234
 235         if (optind < argc) {
 236                 ctdlhost = argv[optind];
 237                 if (++optind < argc)
 238                         ctdlport = argv[optind];
 239         }
 240
 241         /* daemonize, if we were asked to */
 242         if (!DumpTemplateI18NStrings && running_as_daemon) {
 243                 start_daemon(pidfile);
 244         }
 245         else {
 246                 signal(SIGINT, graceful_shutdown);
 247                 signal(SIGHUP, graceful_shutdown);
 248         }
 249
 250         webcit_calc_dirs_n_files(relh, basedir, home, webcitdir, relhome);
 251         LoadIconDir(static_icon_dir);
 252
 253         /* Tell 'em who's in da house */
 254         lprintf(1, PACKAGE_STRING "\n");
 255         lprintf(1, "Copyright (C) 1996-2010 by the Citadel development team.\n"
 256                 "This software is distributed under the terms of the "
 257                 "GNU General Public License.\n\n"
 258         );
 259
 260
 261         /* initialize the International Bright Young Thing */
 262
 263         initialise_modules();
 264
 265         InitTemplateCache();
 266         if (DumpTemplateI18NStrings) {
 267                 FILE *fd;
 268                 StrBufAppendBufPlain(I18nDump, HKEY("}\n"), 0);
 269                 if (StrLength(I18nDump) < 50) {
 270                         lprintf(1, "********************************************************************************\n");
 271                         lprintf(1, "*        No strings found in templates!  Are you sure they're there?           *\n");
 272                         lprintf(1, "********************************************************************************\n");
 273                         return -1;
 274                 }
 275                 fd = fopen(I18nDumpFile, "w");
 276                 if (fd == NULL) {
 277                         lprintf(1, "********************************************************************************\n");
 278                         lprintf(1, "*                  unable to open I18N dumpfile [%s]         *\n", I18nDumpFile);
 279                         lprintf(1, "********************************************************************************\n");
 280                         return -1;
 281                 }
 282                 rv = fwrite(ChrPtr(I18nDump), 1, StrLength(I18nDump), fd);
 283                 fclose(fd);
 284                 return 0;
 285         }
 286
 287
 288         /* Tell libical to return an error instead of aborting if it sees badly formed iCalendar data. */
 289         icalerror_errors_are_fatal = 0;
 290
 291         /* Use our own prefix on tzid's generated from system tzdata */
 292         icaltimezone_set_tzid_prefix("/citadel.org/");
 293
 294         /*
 295          * Set up a place to put thread-specific data.
 296          * We only need a single pointer per thread - it points to the
 297          * wcsession struct to which the thread is currently bound.
 298          */
 299         if (pthread_key_create(&MyConKey, NULL) != 0) {
 300                 lprintf(1, "Can't create TSD key: %s\n", strerror(errno));
 301         }
 302         InitialiseSemaphores ();
 303
 304         /*
 305          * Set up a place to put thread-specific SSL data.
 306          * We don't stick this in the wcsession struct because SSL starts
 307          * up before the session is bound, and it gets torn down between
 308          * transactions.
 309          */
 310 #ifdef HAVE_OPENSSL
 311         if (pthread_key_create(&ThreadSSL, NULL) != 0) {
 312                 lprintf(1, "Can't create TSD key: %s\n", strerror(errno));
 313         }
 314 #endif
 315
 316         /*
 317          * Bind the server to our favorite port.
 318          * There is no need to check for errors, because webcit_tcp_server()
 319          * exits if it doesn't succeed.
 320          */
 321
 322         if (!IsEmptyStr(uds_listen_path)) {
 323                 lprintf(2, "Attempting to create listener socket at %s...\n", uds_listen_path);
 324                 msock = webcit_uds_server(uds_listen_path, LISTEN_QUEUE_LENGTH);
 325         }
 326         else {
 327                 lprintf(2, "Attempting to bind to port %d...\n", http_port);
 328                 msock = webcit_tcp_server(ip_addr, http_port, LISTEN_QUEUE_LENGTH);
 329         }
 330         if (msock < 0)
 331         {
 332                 ShutDownWebcit();
 333                 return -msock;
 334         }
 335
 336         lprintf(2, "Listening on socket %d\n", msock);
 337         signal(SIGPIPE, SIG_IGN);
 338
 339         pthread_mutex_init(&SessionListMutex, NULL);
 340
 341         /*
 342          * Start up the housekeeping thread
 343          */
 344         pthread_attr_init(&attr);
 345         pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
 346         pthread_create(&SessThread, &attr,
 347                        (void *(*)(void *)) housekeeping_loop, NULL);
 348
 349
 350         /*
 351          * If this is an HTTPS server, fire up SSL
 352          */
 353 #ifdef HAVE_OPENSSL
 354         if (is_https) {
 355                 init_ssl();
 356         }
 357 #endif
 358         drop_root(UID);
 359
 360         /* Become a worker thread.  More worker threads will be spawned as they are needed. */
 361         worker_entry();
 362         ShutDownLibCitadel ();
 363         return 0;
 364 }
 365
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