webcit/webserver.c

   1 /*
   2  * $Id$
   3  *
   4  * This contains a simple multithreaded TCP server manager.  It sits around
   5  * waiting on the specified port for incoming HTTP connections.  When a
   6  * connection is established, it calls context_loop() from context_loop.c.
   7  *
   8  * Copyright (c) 1996-2010 by the citadel.org developers.
   9  * This program is released under the terms of the GNU General Public License v3.
  10  *
  11  */
  12
  13 #include "webcit.h"
  14 #include "webserver.h"
  15
  16 #include "modules_init.h"
  17 #ifndef HAVE_SNPRINTF
  18 int vsnprintf(char *buf, size_t max, const char *fmt, va_list argp);
  19 #endif
  20
  21
  22 extern int msock;                       /* master listening socket */
  23 extern int verbosity;           /* Logging level */
  24 extern char static_icon_dir[PATH_MAX];          /* where should we find our mime icons */
  25 extern long MaxRead;
  26 int is_https = 0;               /* Nonzero if I am an HTTPS service */
  27 int follow_xff = 0;             /* Follow X-Forwarded-For: header */
  28 int home_specified = 0;         /* did the user specify a homedir? */
  29 int DisableGzip = 0;
  30 extern pthread_mutex_t SessionListMutex;
  31 extern pthread_key_t MyConKey;
  32
  33 extern void *housekeeping_loop(void);
  34 extern int ig_tcp_server(char *ip_addr, int port_number, int queue_len);
  35 extern int ig_uds_server(char *sockpath, int queue_len);
  36 extern void graceful_shutdown_watcher(int signum);
  37 extern void graceful_shutdown(int signum);
  38 extern void start_daemon(char *pid_file);
  39 extern void webcit_calc_dirs_n_files(int relh, const char *basedir, int home, char *webcitdir, char *relhome);
  40
  41 extern void drop_root(uid_t UID);
  42
  43 char socket_dir[PATH_MAX];                      /* where to talk to our citadel server */
  44
  45 char *server_cookie = NULL;     /* our Cookie connection to the client */
  46 int http_port = PORT_NUM;       /* Port to listen on */
  47 char *ctdlhost = DEFAULT_HOST;  /* our name */
  48 char *ctdlport = DEFAULT_PORT;  /* our Port */
  49 int setup_wizard = 0;           /* should we run the setup wizard? \todo */
  50 char wizard_filename[PATH_MAX]; /* where's the setup wizard? */
  51 int running_as_daemon = 0;      /* should we deamonize on startup? */
  52
  53
  54
  55 /* #define DBG_PRINNT_HOOKS_AT_START */
  56 #ifdef DBG_PRINNT_HOOKS_AT_START
  57 extern HashList *HandlerHash;
  58 const char foobuf[32];
  59 const char *nix(void *vptr) {snprintf(foobuf, 32, "%0x", (long) vptr); return foobuf;}
  60 #endif
  61 extern int dbg_analyze_msg;
  62 extern int dbg_bactrace_template_errors;
  63 extern int DumpTemplateI18NStrings;
  64 extern StrBuf *I18nDump;
  65 void InitTemplateCache(void);
  66 extern int LoadTemplates;
  67
  68
  69
  70
  71 /*
  72  * Here's where it all begins.
  73  */
  74 int main(int argc, char **argv)
  75 {
  76         uid_t UID = -1;
  77         size_t basesize = 2;            /* how big should strbufs be on creation? */
  78         pthread_t SessThread;           /* Thread descriptor */
  79         pthread_attr_t attr;            /* Thread attributes */
  80         int a;                          /* General-purpose variable */
  81         char tracefile[PATH_MAX];
  82         char ip_addr[256]="0.0.0.0";
  83         int relh=0;
  84         int home=0;
  85         int home_specified=0;
  86         char relhome[PATH_MAX]="";
  87         char webcitdir[PATH_MAX] = DATADIR;
  88         char *pidfile = NULL;
  89         char *hdir;
  90         const char *basedir = NULL;
  91         char uds_listen_path[PATH_MAX]; /* listen on a unix domain socket? */
  92         const char *I18nDumpFile = NULL;
  93         FILE *rvfp = NULL;
  94         int rv = 0;
  95
  96         WildFireInitBacktrace(argv[0], 2);
  97
  98         start_modules ();
  99
 100 #ifdef DBG_PRINNT_HOOKS_AT_START
 101 /*      dbg_PrintHash(HandlerHash, nix, NULL);*/
 102 #endif
 103
 104         /* Ensure that we are linked to the correct version of libcitadel */
 105         if (libcitadel_version_number() < LIBCITADEL_VERSION_NUMBER) {
 106                 fprintf(stderr, " You are running libcitadel version %d.%02d\n",
 107                         (libcitadel_version_number() / 100), (libcitadel_version_number() % 100));
 108                 fprintf(stderr, "WebCit was compiled against version %d.%02d\n",
 109                         (LIBCITADEL_VERSION_NUMBER / 100), (LIBCITADEL_VERSION_NUMBER % 100));
 110                 return(1);
 111         }
 112
 113         strcpy(uds_listen_path, "");
 114
 115         /* Parse command line */
 116 #ifdef HAVE_OPENSSL
 117         while ((a = getopt(argc, argv, "R:u:h:i:p:t:T:B:x:dD:G:cfsS:Z")) != EOF)
 118 #else
 119         while ((a = getopt(argc, argv, "R:u:h:i:p:t:T:B:x:dD:G:cfZ")) != EOF)
 120 #endif
 121                 switch (a) {
 122                 case 'u':
 123                         UID = atol(optarg);
 124                         break;
 125                 case 'h':
 126                         hdir = strdup(optarg);
 127                         relh=hdir[0]!='/';
 128                         if (!relh) {
 129                                 safestrncpy(webcitdir, hdir, sizeof webcitdir);
 130                         }
 131                         else {
 132                                 safestrncpy(relhome, relhome, sizeof relhome);
 133                         }
 134                         /* free(hdir); TODO: SHOULD WE DO THIS? */
 135                         home_specified = 1;
 136                         home=1;
 137                         break;
 138                 case 'd':
 139                         running_as_daemon = 1;
 140                         break;
 141                 case 'D':
 142                         pidfile = strdup(optarg);
 143                         running_as_daemon = 1;
 144                         break;
 145                 case 'B': /* Basesize */
 146                         basesize = atoi(optarg);
 147                         if (basesize > 2)
 148                                 StartLibCitadel(basesize);
 149                         break;
 150                 case 'i':
 151                         safestrncpy(ip_addr, optarg, sizeof ip_addr);
 152                         break;
 153                 case 'p':
 154                         http_port = atoi(optarg);
 155                         if (http_port == 0) {
 156                                 safestrncpy(uds_listen_path, optarg, sizeof uds_listen_path);
 157                         }
 158                         break;
 159                 case 't':
 160                         safestrncpy(tracefile, optarg, sizeof tracefile);
 161                         rvfp = freopen(tracefile, "w", stdout);
 162                         rvfp = freopen(tracefile, "w", stderr);
 163                         rvfp = freopen(tracefile, "r", stdin);
 164                         break;
 165                 case 'T':
 166                         LoadTemplates = atoi(optarg);
 167                         dbg_analyze_msg = (LoadTemplates && (1<<1)) != 0;
 168                         dbg_bactrace_template_errors = (LoadTemplates && (1<<2)) != 0;
 169                         break;
 170                 case 'Z':
 171                         DisableGzip = 1;
 172                         break;
 173                 case 'x':
 174                         verbosity = atoi(optarg);
 175                         break;
 176                 case 'f':
 177                         follow_xff = 1;
 178                         break;
 179                 case 'c':
 180                         server_cookie = malloc(256);
 181                         if (server_cookie != NULL) {
 182                                 safestrncpy(server_cookie,
 183                                        "Set-cookie: wcserver=",
 184                                         256);
 185                                 if (gethostname
 186                                     (&server_cookie[strlen(server_cookie)],
 187                                      200) != 0) {
 188                                         lprintf(2, "gethostname: %s\n",
 189                                                 strerror(errno));
 190                                         free(server_cookie);
 191                                 }
 192                         }
 193                         break;
 194 #ifdef HAVE_OPENSSL
 195                 case 's':
 196                         is_https = 1;
 197                         break;
 198                 case 'S':
 199                         is_https = 1;
 200                         ssl_cipher_list = strdup(optarg);
 201                         break;
 202 #endif
 203                 case 'G':
 204                         DumpTemplateI18NStrings = 1;
 205                         I18nDump = NewStrBufPlain(HKEY("int templatestrings(void)\n{\n"));
 206                         I18nDumpFile = optarg;
 207                         break;
 208                 case 'R':
 209                         MaxRead = atol(optarg);
 210                         break;
 211                 default:
 212                         fprintf(stderr, "usage: webcit "
 213                                 "[-i ip_addr] [-p http_port] "
 214                                 "[-t tracefile] [-c] [-f] "
 215                                 "[-T Templatedebuglevel] "
 216                                 "[-d] [-Z] [-G i18ndumpfile] "
 217 #ifdef HAVE_OPENSSL
 218                                 "[-s] [-S cipher_suites]"
 219 #endif
 220                                 "[remotehost [remoteport]]\n");
 221                         return 1;
 222                 }
 223
 224         if (optind < argc) {
 225                 ctdlhost = argv[optind];
 226                 if (++optind < argc)
 227                         ctdlport = argv[optind];
 228         }
 229
 230         /* daemonize, if we were asked to */
 231         if (!DumpTemplateI18NStrings && running_as_daemon) {
 232                 start_daemon(pidfile);
 233         }
 234         else {
 235                 signal(SIGINT, graceful_shutdown);
 236                 signal(SIGHUP, graceful_shutdown);
 237         }
 238
 239         webcit_calc_dirs_n_files(relh, basedir, home, webcitdir, relhome);
 240         LoadIconDir(static_icon_dir);
 241
 242         /* Tell 'em who's in da house */
 243         lprintf(1, PACKAGE_STRING "\n");
 244         lprintf(1, "Copyright (C) 1996-2010 by the Citadel development team.\n"
 245                 "This software is distributed under the terms of the "
 246                 "GNU General Public License.\n\n"
 247         );
 248
 249
 250         /* initialize the International Bright Young Thing */
 251
 252         initialise_modules();
 253
 254         InitTemplateCache();
 255         if (DumpTemplateI18NStrings) {
 256                 FILE *fd;
 257                 StrBufAppendBufPlain(I18nDump, HKEY("}\n"), 0);
 258                 if (StrLength(I18nDump) < 50) {
 259                         lprintf(1, "********************************************************************************\n");
 260                         lprintf(1, "*        No strings found in templates!  Are you sure they're there?           *\n");
 261                         lprintf(1, "********************************************************************************\n");
 262                         return -1;
 263                 }
 264                 fd = fopen(I18nDumpFile, "w");
 265                 if (fd == NULL) {
 266                         lprintf(1, "********************************************************************************\n");
 267                         lprintf(1, "*                  unable to open I18N dumpfile [%s]         *\n", I18nDumpFile);
 268                         lprintf(1, "********************************************************************************\n");
 269                         return -1;
 270                 }
 271                 rv = fwrite(ChrPtr(I18nDump), 1, StrLength(I18nDump), fd);
 272                 fclose(fd);
 273                 return 0;
 274         }
 275
 276
 277         /* Tell libical to return an error instead of aborting if it sees badly formed iCalendar data. */
 278         icalerror_errors_are_fatal = 0;
 279
 280         /* Use our own prefix on tzid's generated from system tzdata */
 281         icaltimezone_set_tzid_prefix("/citadel.org/");
 282
 283         /*
 284          * Set up a place to put thread-specific data.
 285          * We only need a single pointer per thread - it points to the
 286          * wcsession struct to which the thread is currently bound.
 287          */
 288         if (pthread_key_create(&MyConKey, NULL) != 0) {
 289                 lprintf(1, "Can't create TSD key: %s\n", strerror(errno));
 290         }
 291         InitialiseSemaphores ();
 292
 293         /*
 294          * Set up a place to put thread-specific SSL data.
 295          * We don't stick this in the wcsession struct because SSL starts
 296          * up before the session is bound, and it gets torn down between
 297          * transactions.
 298          */
 299 #ifdef HAVE_OPENSSL
 300         if (pthread_key_create(&ThreadSSL, NULL) != 0) {
 301                 lprintf(1, "Can't create TSD key: %s\n", strerror(errno));
 302         }
 303 #endif
 304
 305         /*
 306          * Bind the server to our favorite port.
 307          * There is no need to check for errors, because ig_tcp_server()
 308          * exits if it doesn't succeed.
 309          */
 310
 311         if (!IsEmptyStr(uds_listen_path)) {
 312                 lprintf(2, "Attempting to create listener socket at %s...\n", uds_listen_path);
 313                 msock = ig_uds_server(uds_listen_path, LISTEN_QUEUE_LENGTH);
 314         }
 315         else {
 316                 lprintf(2, "Attempting to bind to port %d...\n", http_port);
 317                 msock = ig_tcp_server(ip_addr, http_port, LISTEN_QUEUE_LENGTH);
 318         }
 319         if (msock < 0)
 320         {
 321                 ShutDownWebcit();
 322                 return -msock;
 323         }
 324
 325         lprintf(2, "Listening on socket %d\n", msock);
 326         signal(SIGPIPE, SIG_IGN);
 327
 328         pthread_mutex_init(&SessionListMutex, NULL);
 329
 330         /*
 331          * Start up the housekeeping thread
 332          */
 333         pthread_attr_init(&attr);
 334         pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
 335         pthread_create(&SessThread, &attr,
 336                        (void *(*)(void *)) housekeeping_loop, NULL);
 337
 338
 339         /*
 340          * If this is an HTTPS server, fire up SSL
 341          */
 342 #ifdef HAVE_OPENSSL
 343         if (is_https) {
 344                 init_ssl();
 345         }
 346 #endif
 347         drop_root(UID);
 348
 349         /* Become a worker thread.  More worker threads will be spawned as they are needed. */
 350         worker_entry();
 351         ShutDownLibCitadel ();
 352         return 0;
 353 }
 354
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