src/config.c

   1 /* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2
   3 /*  Monkey HTTP Daemon
   4  *  ------------------
   5  *  Copyright (C) 2001-2010, Eduardo Silva P. <edsiper@gmail.com>
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; either version 2 of the License, or
  10  *  (at your option) any later version.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU Library General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, write to the Free Software
  19  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  20  */
  21
  22 #include <dirent.h>
  23 #include <stdio.h>
  24 #include <sys/types.h>
  25 #include <sys/socket.h>
  26 #include <netinet/in.h>
  27 #include <stdlib.h>
  28 #include <sys/stat.h>
  29 #include <unistd.h>
  30 #include <string.h>
  31 #include <fcntl.h>
  32
  33 #include "monkey.h"
  34 #include "config.h"
  35 #include "str.h"
  36 #include "utils.h"
  37 #include "mimetype.h"
  38 #include "info.h"
  39 #include "logfile.h"
  40 #include "memory.h"
  41 #include "plugin.h"
  42
  43 struct mk_config *mk_config_create(char *path)
  44 {
  45     FILE *f;
  46     int len;
  47     char buf[255];
  48     char *key = 0, *val = 0, *last = 0;
  49     struct mk_config *cnf = 0, *new, *p;
  50
  51     if ((f = fopen(path, "r")) == NULL) {
  52         fprintf(stderr, "\nConfig Error: I can't open %s file\n\n", path);
  53         exit(1);
  54     }
  55
  56     /* looking for configuration directives */
  57     while (fgets(buf, 255, f)) {
  58         len = strlen(buf);
  59         if (buf[len - 1] == '\n') {
  60             buf[--len] = 0;
  61             if (len && buf[len - 1] == '\r')
  62                 buf[--len] = 0;
  63         }
  64
  65         if (!buf[0] || buf[0] == '#')
  66             continue;
  67
  68         key = strtok_r(buf, "\"\t ", &last);
  69         val = strtok_r(NULL, "\n", &last);
  70
  71         if (!key || !val) {
  72             continue;
  73         }
  74
  75         /* Allow new entry found */
  76         new = mk_mem_malloc(sizeof(struct mk_config));
  77         new->key = mk_string_dup(key);
  78         new->val = mk_string_dup(val);
  79         new->next = NULL;
  80
  81         /* Link to main list */
  82         if (!cnf) {
  83             cnf = new;
  84         }
  85         else {
  86             p = cnf;
  87             while (p->next) {
  88                 p = p->next;
  89             }
  90             p->next = new;
  91         }
  92     }
  93
  94     fclose(f);
  95     return cnf;
  96 }
  97
  98 void mk_config_free(struct mk_config *cnf)
  99 {
 100     struct mk_config *prev = 0, *target;
 101
 102     target = cnf;
 103     while (target) {
 104         while (target->next) {
 105             prev = target;
 106             target = target->next;
 107         }
 108
 109         mk_mem_free(target);
 110
 111         if (target == cnf) {
 112             return;
 113         }
 114         prev->next = NULL;
 115         target = cnf;
 116     }
 117 }
 118
 119 void *mk_config_getval(struct mk_config *cnf, char *key, int mode)
 120 {
 121     int on, off;
 122     struct mk_config *p;
 123
 124     p = cnf;
 125     while (p) {
 126         if (strcasecmp(p->key, key) == 0) {
 127             switch (mode) {
 128             case MK_CONFIG_VAL_STR:
 129                 return (void *) p->val;
 130             case MK_CONFIG_VAL_NUM:
 131                 return (void *) atoi(p->val);
 132             case MK_CONFIG_VAL_BOOL:
 133                 on = strcasecmp(p->val, VALUE_ON);
 134                 off = strcasecmp(p->val, VALUE_OFF);
 135
 136                 if (on != 0 && off != 0) {
 137                     return (void *) -1;
 138                 }
 139                 else if (on >= 0) {
 140                     return (void *) VAR_ON;
 141                 }
 142                 else {
 143                     return (void *) VAR_OFF;
 144                 }
 145             case MK_CONFIG_VAL_LIST:
 146                 return mk_string_split_line(p->val);
 147             }
 148         }
 149         else {
 150             p = p->next;
 151         }
 152     }
 153     return NULL;
 154 }
 155
 156 /* Read configuration files */
 157 void mk_config_read_files(char *path_conf, char *file_conf)
 158 {
 159     unsigned long len;
 160     char *path = 0;
 161     struct stat checkdir;
 162     struct mk_config *cnf;
 163     struct mk_string_line *line, *line_val;
 164
 165     config->serverconf = mk_string_dup(path_conf);
 166     config->workers = MK_WORKERS_DEFAULT;
 167
 168     if (stat(config->serverconf, &checkdir) == -1) {
 169         fprintf(stderr, "ERROR: Invalid path to configuration files.");
 170         exit(1);
 171     }
 172
 173     m_build_buffer(&path, &len, "%s/%s", path_conf, file_conf);
 174
 175     cnf = mk_config_create(path);
 176
 177     /* Listen */
 178     config->listen_addr = mk_config_getval(cnf, "Listen", MK_CONFIG_VAL_STR);
 179     if (!config->listen_addr) {
 180         config->listen_addr = MK_DEFAULT_LISTEN_ADDR;
 181     }
 182
 183     /* Connection port */
 184     config->serverport = (int) mk_config_getval(cnf,
 185                                                 "Port", MK_CONFIG_VAL_NUM);
 186     if (!config->serverport >= 1 && !config->serverport <= 65535) {
 187         mk_config_print_error_msg("Port", path);
 188     }
 189
 190     /* Number of thread workers */
 191     config->workers = (int) mk_config_getval(cnf,
 192                                              "Workers", MK_CONFIG_VAL_NUM);
 193     if (config->maxclients < 1) {
 194         mk_config_print_error_msg("Workers", path);
 195     }
 196
 197     /* Timeout */
 198     config->timeout = (int) mk_config_getval(cnf,
 199                                              "Timeout", MK_CONFIG_VAL_NUM);
 200     if (config->timeout < 1) {
 201         mk_config_print_error_msg("Timeout", path);
 202     }
 203
 204     /* KeepAlive */
 205     config->keep_alive = (int) mk_config_getval(cnf,
 206                                                 "KeepAlive",
 207                                                 MK_CONFIG_VAL_BOOL);
 208     if (config->keep_alive == VAR_ERR) {
 209         mk_config_print_error_msg("KeepAlive", path);
 210     }
 211
 212     /* MaxKeepAliveRequest */
 213     config->max_keep_alive_request = (int) mk_config_getval(cnf,
 214                                                             "MaxKeepAliveRequest",
 215                                                             MK_CONFIG_VAL_NUM);
 216     if (config->max_keep_alive_request == 0) {
 217         mk_config_print_error_msg("MaxKeepAliveRequest", path);
 218     }
 219
 220     /* KeepAliveTimeout */
 221     config->keep_alive_timeout = (int) mk_config_getval(cnf,
 222                                                         "KeepAliveTimeout",
 223                                                         MK_CONFIG_VAL_NUM);
 224     if (config->keep_alive_timeout == 0) {
 225         mk_config_print_error_msg("KeepAliveTimeout", path);
 226     }
 227
 228     /* Pid File */
 229     config->pid_file_path = mk_config_getval(cnf,
 230                                              "PidFile", MK_CONFIG_VAL_STR);
 231
 232     /* Home user's directory /~ */
 233     config->user_dir = mk_config_getval(cnf, "UserDir", MK_CONFIG_VAL_STR);
 234
 235     /* Index files */
 236     line_val = line = mk_config_getval(cnf, "Indexfile", MK_CONFIG_VAL_LIST);
 237     while (line_val != NULL) {
 238         mk_config_add_index(line_val->val);
 239         line_val = line_val->next;
 240     }
 241
 242     /* HideVersion Variable */
 243     config->hideversion = (int) mk_config_getval(cnf,
 244                                                  "HideVersion",
 245                                                  MK_CONFIG_VAL_BOOL);
 246     if (config->hideversion == VAR_ERR) {
 247         mk_config_print_error_msg("HideVersion", path);
 248     }
 249
 250     /* User Variable */
 251     config->user = mk_config_getval(cnf, "User", MK_CONFIG_VAL_STR);
 252
 253     /* Resume */
 254     config->resume = (int) mk_config_getval(cnf,
 255                                             "Resume", MK_CONFIG_VAL_BOOL);
 256     if (config->resume == VAR_ERR) {
 257         mk_config_print_error_msg("Resume", path);
 258     }
 259
 260     /* Symbolic Links */
 261     config->symlink = (int) mk_config_getval(cnf,
 262                                              "SymLink", MK_CONFIG_VAL_BOOL);
 263     if (config->symlink == VAR_ERR) {
 264         mk_config_print_error_msg("SymLink", path);
 265     }
 266
 267     mk_mem_free(path);
 268     mk_config_free(cnf);
 269     mk_config_read_hosts(path_conf);
 270 }
 271
 272 void mk_config_read_hosts(char *path)
 273 {
 274     DIR *dir;
 275     unsigned long len;
 276     char *buf = 0;
 277     char *file;
 278     struct host *p_host, *new_host;     /* debug */
 279     struct dirent *ent;
 280
 281     m_build_buffer(&buf, &len, "%s/sites/default", path);
 282     config->hosts = mk_config_get_host(buf);
 283     config->nhosts++;
 284     mk_mem_free(buf);
 285
 286     if (!config->hosts) {
 287         printf("\nError parsing main configuration file 'default'\n");
 288         exit(1);
 289     }
 290
 291     m_build_buffer(&buf, &len, "%s/sites/", path);
 292     if (!(dir = opendir(buf)))
 293         exit(1);
 294
 295
 296     p_host = config->hosts;
 297
 298     /* Reading content */
 299     while ((ent = readdir(dir)) != NULL) {
 300         if (strcmp((char *) ent->d_name, ".") == 0)
 301             continue;
 302         if (strcmp((char *) ent->d_name, "..") == 0)
 303             continue;
 304         if (strcasecmp((char *) ent->d_name, "default") == 0)
 305             continue;
 306
 307         m_build_buffer(&file, &len, "%s/sites/%s", path, ent->d_name);
 308
 309         new_host = (struct host *) mk_config_get_host(file);
 310         mk_mem_free(file);
 311         if (!new_host) {
 312             continue;
 313         }
 314         else {
 315             p_host->next = new_host;
 316             p_host = new_host;
 317             config->nhosts++;
 318         }
 319     }
 320     closedir(dir);
 321     /*
 322        h = config->hosts;
 323        while(h)
 324        {
 325        printf("*** HOST ***\n");
 326        printf(" [servername]\t\t%s\n", h->servername);
 327        printf(" [documentroot]\t\t%s\n", h->documentroot);
 328        printf(" [conf file]\t\t%s\n", h->file);
 329        printf(" [access log]\t\t%s\n", h->access_log_path);
 330        printf(" [error log]\t\t%s\n", h->error_log_path);
 331        printf(" [script alias]\t\t%s %s\n", h->scriptalias[0], h->scriptalias[1]);
 332        printf(" [get dir]\t\t%i\n", h->getdir);
 333        printf(" [header file]\t\t%s\n", h->header_file);
 334        printf(" [footer file]\t\t%s\n\n", h->footer_file);
 335
 336        h = h->next;
 337        }
 338        fflush(stdout);
 339      */
 340 }
 341
 342 struct host *mk_config_get_host(char *path)
 343 {
 344     unsigned long len = 0;
 345     struct stat checkdir;
 346     struct host *host;
 347     struct mk_config *cnf;
 348
 349     cnf = mk_config_create(path);
 350
 351     host = mk_mem_malloc_z(sizeof(struct host));
 352     host->servername = 0;
 353     host->file = mk_string_dup(path);
 354
 355     host->servername = mk_config_getval(cnf, "Servername", MK_CONFIG_VAL_STR);
 356     host->documentroot.data = mk_config_getval(cnf,
 357                                                "DocumentRoot",
 358                                                MK_CONFIG_VAL_STR);
 359     host->documentroot.len = strlen(host->documentroot.data);
 360     if (stat(host->documentroot.data, &checkdir) == -1) {
 361         fprintf(stderr, "ERROR: Invalid path to Server_root in %s\n\n", path);
 362         exit(1);
 363     }
 364     else if (!(checkdir.st_mode & S_IFDIR)) {
 365         fprintf(stderr,
 366                 "ERROR: DocumentRoot variable in %s has an invalid directory path\n\n",
 367                 path);
 368         exit(1);
 369     }
 370
 371     /* Access log */
 372     host->access_log_path = mk_config_getval(cnf,
 373                                              "AccessLog", MK_CONFIG_VAL_STR);
 374     /* Error log */
 375     host->error_log_path = mk_config_getval(cnf,
 376                                             "ErrorLog", MK_CONFIG_VAL_STR);
 377
 378     /* Get directory */
 379     host->getdir = (int) mk_config_getval(cnf, "GetDir", MK_CONFIG_VAL_BOOL);
 380     if (host->getdir == VAR_ERR) {
 381         mk_config_print_error_msg("GetDir", path);
 382     }
 383
 384     if (!host->servername) {
 385         mk_config_free(cnf);
 386         return NULL;
 387     }
 388
 389     /* Server Signature */
 390     if (config->hideversion == VAR_OFF) {
 391         m_build_buffer(&host->host_signature, &len,
 392                        "Monkey/%s", VERSION);
 393     }
 394     else {
 395         m_build_buffer(&host->host_signature, &len, "Monkey");
 396     }
 397     m_build_buffer(&host->header_host_signature.data,
 398                    &host->header_host_signature.len,
 399                    "Server: %s", host->host_signature);
 400
 401     if( host->access_log_path != NULL ) {
 402         if (pipe(host->log_access) < 0) {
 403             perror("pipe");
 404         } else {
 405             fcntl(host->log_access[1], F_SETFL, O_NONBLOCK);
 406         }
 407     }
 408
 409     if( host->error_log_path != NULL ) {
 410         if (pipe(host->log_error) < 0) {
 411             perror("pipe");
 412         } else {
 413             fcntl(host->log_error[1], F_SETFL, O_NONBLOCK);
 414         }
 415     }
 416
 417     host->next = NULL;
 418     mk_config_free(cnf);
 419     return host;
 420 }
 421
 422 /* Imprime error de configuracion y cierra */
 423 void mk_config_print_error_msg(char *variable, char *path)
 424 {
 425     fprintf(stderr, "\nError: %s variable in %s has an invalid value.\n",
 426             variable, path);
 427     fflush(stderr);
 428     exit(1);
 429 }
 430
 431 /* Agrega distintos index.xxx */
 432 void mk_config_add_index(char *indexname)
 433 {
 434     struct indexfile *new_index = 0, *aux_index;
 435
 436     new_index = (struct indexfile *) malloc(sizeof(struct indexfile));
 437     strncpy(new_index->indexname, indexname, MAX_INDEX_NOMBRE - 1);
 438     new_index->indexname[MAX_INDEX_NOMBRE - 1] = '\0';
 439     new_index->next = NULL;
 440
 441     if (first_index == NULL) {
 442         first_index = new_index;
 443     }
 444     else {
 445         aux_index = first_index;
 446         while (aux_index->next != NULL)
 447             aux_index = aux_index->next;
 448         aux_index->next = new_index;
 449     }
 450 }
 451
 452 void mk_config_set_init_values(void)
 453 {
 454     /* Valores iniciales */
 455     config->timeout = 15;
 456     config->hideversion = VAR_OFF;
 457     config->keep_alive = VAR_ON;
 458     config->keep_alive_timeout = 15;
 459     config->max_keep_alive_request = 50;
 460     config->maxclients = 150;
 461     config->max_ip = 15;
 462     config->resume = VAR_ON;
 463     config->standard_port = 80;
 464     config->listen_addr = MK_DEFAULT_LISTEN_ADDR;
 465     config->serverport = 2001;
 466     config->symlink = VAR_OFF;
 467     config->nhosts = 0;
 468     config->user = NULL;
 469     config->open_flags = O_RDONLY | O_NONBLOCK;
 470
 471     /* Plugins */
 472     config->plugins = mk_mem_malloc_z(sizeof(struct plugin_stages));
 473 }
 474
 475 /* read main configuration from monkey.conf */
 476 void mk_config_start_configure(void)
 477 {
 478     unsigned long len;
 479
 480     mk_config_set_init_values();
 481     mk_config_read_files(config->file_config, M_DEFAULT_CONFIG_FILE);
 482
 483     /* if not index names defined, set default */
 484     if (first_index == NULL) {
 485         mk_config_add_index("index.html");
 486     }
 487
 488     /* Load mimes */
 489     mk_mimetype_read_config();
 490
 491     /* Basic server information */
 492     if (config->hideversion == VAR_OFF) {
 493         m_build_buffer(&config->server_software.data,
 494                        &len, "Monkey/%s (%s)", VERSION, OS);
 495         config->server_software.len = len;
 496     }
 497     else {
 498         m_build_buffer(&config->server_software.data, &len, "Monkey Server");
 499         config->server_software.len = len;
 500     }
 501 }
 502
 503 struct host *mk_config_host_find(mk_pointer host)
 504 {
 505     struct host *aux_host;
 506
 507     aux_host = config->hosts;
 508
 509     while (aux_host) {
 510         if (strncasecmp(aux_host->servername, host.data, host.len) == 0)
 511             break;
 512         else
 513             aux_host = aux_host->next;
 514     }
 515
 516     return aux_host;
 517 }
 518
 519 void mk_config_sanity_check()
 520 {
 521     /* Check O_NOATIME for current user, flag will just be used
 522      * if running user is allowed to.
 523      */
 524     int fd, flags = config->open_flags;
 525
 526     flags |= O_NOATIME;
 527     fd = open(config->file_config, flags);
 528
 529     if (fd > -1) {
 530         config->open_flags = flags;
 531         close(fd);
 532     }
 533 }