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