/* tinyproxy - A fast light-weight HTTP proxy * Copyright (C) 2004 Robert James Kaes * Copyright (C) 2009 Michael Adam * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ /* Parses the configuration file and sets up the config_s structure for * use by the application. This file replaces the old grammar.y and * scanner.l files. It takes up less space and _I_ think is easier to * add new directives to. Who knows if I'm right though. */ #include "conf.h" #include "acl.h" #include "anonymous.h" #include "child.h" #include "filter.h" #include "heap.h" #include "html-error.h" #include "log.h" #include "reqs.h" #include "reverse-proxy.h" #include "upstream.h" #include "connect-ports.h" /* * The configuration directives are defined in the structure below. Each * directive requires a regular expression to match against, and a * function to call when the regex is matched. * * Below are defined certain constant regular expression strings that * can (and likely should) be used when building the regex for the * given directive. */ #define WS "[[:space:]]+" #define STR "\"([^\"]+)\"" #define BOOL "(yes|on|no|off)" #define INT "((0x)?[[:digit:]]+)" #define ALNUM "([-a-z0-9._]+)" #define IP "((([0-9]{1,3})\\.){3}[0-9]{1,3})" #define IPMASK "(" IP "(/[[:digit:]]+)?)" #define IPV6 "(" \ "(([0-9a-f]{1,4}:){1,1}(:[0-9a-f]{1,4}){1,6})|" \ "(([0-9a-f]{1,4}:){1,2}(:[0-9a-f]{1,4}){1,5})|" \ "(([0-9a-f]{1,4}:){1,3}(:[0-9a-f]{1,4}){1,4})|" \ "(([0-9a-f]{1,4}:){1,4}(:[0-9a-f]{1,4}){1,3})|" \ "(([0-9a-f]{1,4}:){1,5}(:[0-9a-f]{1,4}){1,2})|" \ "(([0-9a-f]{1,4}:){1,6}(:[0-9a-f]{1,4}){1,1})|" \ "((([0-9a-f]{1,4}:){1,7}|:):)|" \ "(:(:[0-9a-f]{1,4}){1,7})|" \ "([0-9a-f]{1,4}(:[0-9a-f]{1,4}){1,7})|" \ "(((([0-9a-f]{1,4}:){6})(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3}))|" \ "((([0-9a-f]{1,4}:){5}[0-9a-f]{1,4}:(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3}))|" \ "(([0-9a-f]{1,4}:){5}:[0-9a-f]{1,4}:(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3})|" \ "(([0-9a-f]{1,4}:){1,1}(:[0-9a-f]{1,4}){1,4}:(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3})|" \ "(([0-9a-f]{1,4}:){1,2}(:[0-9a-f]{1,4}){1,3}:(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3})|" \ "(([0-9a-f]{1,4}:){1,3}(:[0-9a-f]{1,4}){1,2}:(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3})|" \ "(([0-9a-f]{1,4}:){1,4}(:[0-9a-f]{1,4}){1,1}:(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3})|" \ "((([0-9a-f]{1,4}:){1,5}|:):(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3})|" \ "(:(:[0-9a-f]{1,4}){1,5}:(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3})" \ ")" #define IPV6MASK "(" IPV6 "(/[[:digit:]]+)?)" #define BEGIN "^[[:space:]]*" #define END "[[:space:]]*$" /* * Limit the maximum number of substring matches to a reasonably high * number. Given the usual structure of the configuration file, sixteen * substring matches should be plenty. */ #define RE_MAX_MATCHES 16 /* * All configuration handling functions are REQUIRED to be defined * with the same function template as below. */ typedef int (*CONFFILE_HANDLER) (struct config_s *, const char *, regmatch_t[]); /* * Define the pattern used by any directive handling function. The * following arguments are defined: * * struct config_s* conf pointer to the current configuration structure * const char* line full line matched by the regular expression * regmatch_t match[] offsets to the substrings matched * * The handling function must return 0 if the directive was processed * properly. Any errors are reported by returning a non-zero value. */ #define HANDLE_FUNC(func) \ int func(struct config_s* conf, const char* line, \ regmatch_t match[]) /* * List all the handling functions. These are defined later, but they need * to be in-scope before the big structure below. */ static HANDLE_FUNC (handle_nop) { return 0; } /* do nothing function */ static HANDLE_FUNC (handle_allow); static HANDLE_FUNC (handle_anonymous); static HANDLE_FUNC (handle_bind); static HANDLE_FUNC (handle_bindsame); static HANDLE_FUNC (handle_connectport); static HANDLE_FUNC (handle_defaulterrorfile); static HANDLE_FUNC (handle_deny); static HANDLE_FUNC (handle_errorfile); static HANDLE_FUNC (handle_addheader); #ifdef FILTER_ENABLE static HANDLE_FUNC (handle_filter); static HANDLE_FUNC (handle_filtercasesensitive); static HANDLE_FUNC (handle_filterdefaultdeny); static HANDLE_FUNC (handle_filterextended); static HANDLE_FUNC (handle_filterurls); #endif static HANDLE_FUNC (handle_group); static HANDLE_FUNC (handle_listen); static HANDLE_FUNC (handle_logfile); static HANDLE_FUNC (handle_loglevel); static HANDLE_FUNC (handle_maxclients); static HANDLE_FUNC (handle_maxrequestsperchild); static HANDLE_FUNC (handle_maxspareservers); static HANDLE_FUNC (handle_minspareservers); static HANDLE_FUNC (handle_pidfile); static HANDLE_FUNC (handle_port); #ifdef REVERSE_SUPPORT static HANDLE_FUNC (handle_reversebaseurl); static HANDLE_FUNC (handle_reversemagic); static HANDLE_FUNC (handle_reverseonly); static HANDLE_FUNC (handle_reversepath); #endif static HANDLE_FUNC (handle_startservers); static HANDLE_FUNC (handle_statfile); static HANDLE_FUNC (handle_stathost); static HANDLE_FUNC (handle_syslog); static HANDLE_FUNC (handle_timeout); static HANDLE_FUNC (handle_user); static HANDLE_FUNC (handle_viaproxyname); static HANDLE_FUNC (handle_disableviaheader); static HANDLE_FUNC (handle_xtinyproxy); #ifdef UPSTREAM_SUPPORT static HANDLE_FUNC (handle_upstream); static HANDLE_FUNC (handle_upstream_no); #endif static void config_free_regex (void); /* * This macro can be used to make standard directives in the form: * directive arguments [arguments ...] * * The directive itself will be the first matched substring. * * Note that this macro is not required. As you can see below, the * comment and blank line elements are defined explicitly since they * do not follow the pattern above. This macro is for convenience * only. */ #define STDCONF(d, re, func) { BEGIN "(" d ")" WS re END, func, NULL } /* * Holds the regular expression used to match the configuration directive, * the function pointer to the routine to handle the directive, and * for internal use, a pointer to the compiled regex so it only needs * to be compiled one. */ struct { const char *re; CONFFILE_HANDLER handler; regex_t *cre; } directives[] = { /* comments */ { BEGIN "#", handle_nop, NULL }, /* blank lines */ { "^[[:space:]]+$", handle_nop, NULL }, /* string arguments */ STDCONF ("logfile", STR, handle_logfile), STDCONF ("pidfile", STR, handle_pidfile), STDCONF ("anonymous", STR, handle_anonymous), STDCONF ("viaproxyname", STR, handle_viaproxyname), STDCONF ("defaulterrorfile", STR, handle_defaulterrorfile), STDCONF ("statfile", STR, handle_statfile), STDCONF ("stathost", STR, handle_stathost), STDCONF ("xtinyproxy", BOOL, handle_xtinyproxy), /* boolean arguments */ STDCONF ("syslog", BOOL, handle_syslog), STDCONF ("bindsame", BOOL, handle_bindsame), STDCONF ("disableviaheader", BOOL, handle_disableviaheader), /* integer arguments */ STDCONF ("port", INT, handle_port), STDCONF ("maxclients", INT, handle_maxclients), STDCONF ("maxspareservers", INT, handle_maxspareservers), STDCONF ("minspareservers", INT, handle_minspareservers), STDCONF ("startservers", INT, handle_startservers), STDCONF ("maxrequestsperchild", INT, handle_maxrequestsperchild), STDCONF ("timeout", INT, handle_timeout), STDCONF ("connectport", INT, handle_connectport), /* alphanumeric arguments */ STDCONF ("user", ALNUM, handle_user), STDCONF ("group", ALNUM, handle_group), /* ip arguments */ STDCONF ("listen", "(" IP "|" IPV6 ")", handle_listen), STDCONF ("allow", "(" "(" IPMASK "|" IPV6MASK ")" "|" ALNUM ")", handle_allow), STDCONF ("deny", "(" "(" IPMASK "|" IPV6MASK ")" "|" ALNUM ")", handle_deny), STDCONF ("bind", "(" IP "|" IPV6 ")", handle_bind), /* other */ STDCONF ("errorfile", INT WS STR, handle_errorfile), STDCONF ("addheader", STR WS STR, handle_addheader), #ifdef FILTER_ENABLE /* filtering */ STDCONF ("filter", STR, handle_filter), STDCONF ("filterurls", BOOL, handle_filterurls), STDCONF ("filterextended", BOOL, handle_filterextended), STDCONF ("filterdefaultdeny", BOOL, handle_filterdefaultdeny), STDCONF ("filtercasesensitive", BOOL, handle_filtercasesensitive), #endif #ifdef REVERSE_SUPPORT /* Reverse proxy arguments */ STDCONF ("reversebaseurl", STR, handle_reversebaseurl), STDCONF ("reverseonly", BOOL, handle_reverseonly), STDCONF ("reversemagic", BOOL, handle_reversemagic), STDCONF ("reversepath", STR "(" WS STR ")?", handle_reversepath), #endif #ifdef UPSTREAM_SUPPORT /* upstream is rather complicated */ { BEGIN "(no" WS "upstream)" WS STR END, handle_upstream_no, NULL }, { BEGIN "(upstream)" WS "(" IP "|" ALNUM ")" ":" INT "(" WS STR ")?" END, handle_upstream, NULL }, #endif /* loglevel */ STDCONF ("loglevel", "(critical|error|warning|notice|connect|info)", handle_loglevel) }; const unsigned int ndirectives = sizeof (directives) / sizeof (directives[0]); static void free_added_headers (vector_t add_headers) { ssize_t i; for (i = 0; i < vector_length (add_headers); i++) { http_header_t *header = (http_header_t *) vector_getentry (add_headers, i, NULL); safefree (header->name); safefree (header->value); } vector_delete (add_headers); } static void free_config (struct config_s *conf) { safefree (conf->config_file); safefree (conf->logf_name); safefree (conf->stathost); safefree (conf->user); safefree (conf->group); vector_delete(conf->listen_addrs); #ifdef FILTER_ENABLE safefree (conf->filter); #endif /* FILTER_ENABLE */ #ifdef REVERSE_SUPPORT free_reversepath_list(conf->reversepath_list); safefree (conf->reversebaseurl); #endif #ifdef UPSTREAM_SUPPORT free_upstream_list (conf->upstream_list); #endif /* UPSTREAM_SUPPORT */ safefree (conf->pidpath); safefree (conf->bind_address); safefree (conf->via_proxy_name); hashmap_delete (conf->errorpages); free_added_headers (conf->add_headers); safefree (conf->errorpage_undef); safefree (conf->statpage); flush_access_list (conf->access_list); free_connect_ports_list (conf->connect_ports); hashmap_delete (conf->anonymous_map); memset (conf, 0, sizeof(*conf)); } /* * Compiles the regular expressions used by the configuration file. This * routine MUST be called before trying to parse the configuration file. * * Returns 0 on success; negative upon failure. */ int config_compile_regex (void) { unsigned int i, r; for (i = 0; i != ndirectives; ++i) { assert (directives[i].handler); assert (!directives[i].cre); directives[i].cre = (regex_t *) safemalloc (sizeof (regex_t)); if (!directives[i].cre) return -1; r = regcomp (directives[i].cre, directives[i].re, REG_EXTENDED | REG_ICASE | REG_NEWLINE); if (r) return r; } atexit (config_free_regex); return 0; } /* * Frees pre-compiled regular expressions used by the configuration * file. This function is registered to be automatically called at exit. */ static void config_free_regex (void) { unsigned int i; for (i = 0; i < ndirectives; i++) { if (directives[i].cre) { regfree (directives[i].cre); safefree (directives[i].cre); directives[i].cre = NULL; } } } /* * Attempt to match the supplied line with any of the configuration * regexes defined above. If a match is found, call the handler * function to process the directive. * * Returns 0 if a match was found and successfully processed; otherwise, * a negative number is returned. */ static int check_match (struct config_s *conf, const char *line) { regmatch_t match[RE_MAX_MATCHES]; unsigned int i; assert (ndirectives > 0); for (i = 0; i != ndirectives; ++i) { assert (directives[i].cre); if (!regexec (directives[i].cre, line, RE_MAX_MATCHES, match, 0)) return (*directives[i].handler) (conf, line, match); } return -1; } /* * Parse the previously opened configuration stream. */ static int config_parse (struct config_s *conf, FILE * f) { char buffer[1024]; /* 1KB lines should be plenty */ unsigned long lineno = 1; while (fgets (buffer, sizeof (buffer), f)) { if (check_match (conf, buffer)) { printf ("Syntax error on line %ld\n", lineno); return 1; } ++lineno; } return 0; } /** * Read the settings from a config file. */ static int load_config_file (const char *config_fname, struct config_s *conf) { FILE *config_file; int ret = -1; config_file = fopen (config_fname, "r"); if (!config_file) { fprintf (stderr, "%s: Could not open config file \"%s\".\n", PACKAGE, config_fname); goto done; } if (config_parse (conf, config_file)) { fprintf (stderr, "Unable to parse config file. " "Not starting.\n"); goto done; } ret = 0; done: if (config_file) fclose (config_file); return ret; } static void initialize_with_defaults (struct config_s *conf, struct config_s *defaults) { if (defaults->logf_name) { conf->logf_name = safestrdup (defaults->logf_name); } if (defaults->config_file) { conf->config_file = safestrdup (defaults->config_file); } conf->syslog = defaults->syslog; conf->port = defaults->port; if (defaults->stathost) { conf->stathost = safestrdup (defaults->stathost); } conf->godaemon = defaults->godaemon; conf->quit = defaults->quit; if (defaults->user) { conf->user = safestrdup (defaults->user); } if (defaults->group) { conf->group = safestrdup (defaults->group); } if (defaults->listen_addrs) { ssize_t i; conf->listen_addrs = vector_create(); for (i=0; i < vector_length(defaults->listen_addrs); i++) { char *addr; size_t size; addr = (char *)vector_getentry(defaults->listen_addrs, i, &size); vector_append(conf->listen_addrs, addr, size); } } #ifdef FILTER_ENABLE if (defaults->filter) { conf->filter = safestrdup (defaults->filter); } conf->filter_url = defaults->filter_url; conf->filter_extended = defaults->filter_extended; conf->filter_casesensitive = defaults->filter_casesensitive; #endif /* FILTER_ENABLE */ #ifdef XTINYPROXY_ENABLE conf->add_xtinyproxy = defaults->add_xtinyproxy; #endif #ifdef REVERSE_SUPPORT /* struct reversepath *reversepath_list; */ conf->reverseonly = defaults->reverseonly; conf->reversemagic = defaults->reversemagic; if (defaults->reversebaseurl) { conf->reversebaseurl = safestrdup (defaults->reversebaseurl); } #endif #ifdef UPSTREAM_SUPPORT /* struct upstream *upstream_list; */ #endif /* UPSTREAM_SUPPORT */ if (defaults->pidpath) { conf->pidpath = safestrdup (defaults->pidpath); } conf->idletimeout = defaults->idletimeout; if (defaults->bind_address) { conf->bind_address = safestrdup (defaults->bind_address); } conf->bindsame = defaults->bindsame; if (defaults->via_proxy_name) { conf->via_proxy_name = safestrdup (defaults->via_proxy_name); } conf->disable_viaheader = defaults->disable_viaheader; if (defaults->errorpage_undef) { conf->errorpage_undef = safestrdup (defaults->errorpage_undef); } if (defaults->statpage) { conf->statpage = safestrdup (defaults->statpage); } /* vector_t access_list; */ /* vector_t connect_ports; */ /* hashmap_t anonymous_map; */ } /** * Load the configuration. */ int reload_config_file (const char *config_fname, struct config_s *conf, struct config_s *defaults) { int ret; log_message (LOG_INFO, "Reloading config file"); free_config (conf); initialize_with_defaults (conf, defaults); ret = load_config_file (config_fname, conf); if (ret != 0) { goto done; } /* Set the default values if they were not set in the config file. */ if (conf->port == 0) { /* * Don't log here in error path: * logging might not be set up yet! */ fprintf (stderr, PACKAGE ": You MUST set a Port in the " "config file.\n"); ret = -1; goto done; } if (!conf->user) { log_message (LOG_WARNING, "You SHOULD set a UserName in the " "config file. Using current user instead."); } if (conf->idletimeout == 0) { log_message (LOG_WARNING, "Invalid idle time setting. " "Only values greater than zero are allowed. " "Therefore setting idle timeout to %u seconds.", MAX_IDLE_TIME); conf->idletimeout = MAX_IDLE_TIME; } done: return ret; } /*********************************************************************** * * The following are basic data extraction building blocks that can * be used to simplify the parsing of a directive. * ***********************************************************************/ static char *get_string_arg (const char *line, regmatch_t * match) { char *p; const unsigned int len = match->rm_eo - match->rm_so; assert (line); assert (len > 0); p = (char *) safemalloc (len + 1); if (!p) return NULL; memcpy (p, line + match->rm_so, len); p[len] = '\0'; return p; } static int set_string_arg (char **var, const char *line, regmatch_t * match) { char *arg = get_string_arg (line, match); if (!arg) return -1; if (*var != NULL) { safefree (*var); } *var = arg; return 0; } static int get_bool_arg (const char *line, regmatch_t * match) { const char *p = line + match->rm_so; assert (line); assert (match && match->rm_so != -1); /* "y"es or o"n" map as true, otherwise it's false. */ if (tolower (p[0]) == 'y' || tolower (p[1]) == 'n') return 1; else return 0; } static int set_bool_arg (unsigned int *var, const char *line, regmatch_t * match) { assert (var); assert (line); assert (match && match->rm_so != -1); *var = get_bool_arg (line, match); return 0; } static unsigned long get_long_arg (const char *line, regmatch_t * match) { assert (line); assert (match && match->rm_so != -1); return strtoul (line + match->rm_so, NULL, 0); } static int set_int_arg (unsigned int *var, const char *line, regmatch_t * match) { assert (var); assert (line); assert (match); *var = (unsigned int) get_long_arg (line, match); return 0; } /*********************************************************************** * * Below are all the directive handling functions. You will notice * that most of the directives delegate to one of the basic data * extraction routines. This is deliberate. To add a new directive * to tinyproxy only requires you to define the regular expression * above and then figure out what data extract routine to use. * * However, you will also notice that more complicated directives are * possible. You can make your directive as complicated as you require * to express a solution to the problem you're tackling. * * See the definition/comment about the HANDLE_FUNC() macro to learn * what arguments are supplied to the handler, and to determine what * values to return. * ***********************************************************************/ static HANDLE_FUNC (handle_logfile) { return set_string_arg (&conf->logf_name, line, &match[2]); } static HANDLE_FUNC (handle_pidfile) { return set_string_arg (&conf->pidpath, line, &match[2]); } static HANDLE_FUNC (handle_anonymous) { char *arg = get_string_arg (line, &match[2]); if (!arg) return -1; anonymous_insert (arg); safefree (arg); return 0; } static HANDLE_FUNC (handle_viaproxyname) { int r = set_string_arg (&conf->via_proxy_name, line, &match[2]); if (r) return r; log_message (LOG_INFO, "Setting \"Via\" header to '%s'", conf->via_proxy_name); return 0; } static HANDLE_FUNC (handle_disableviaheader) { int r = set_bool_arg (&conf->disable_viaheader, line, &match[2]); if (r) { return r; } log_message (LOG_INFO, "Disabling transmission of the \"Via\" header."); return 0; } static HANDLE_FUNC (handle_defaulterrorfile) { return set_string_arg (&conf->errorpage_undef, line, &match[2]); } static HANDLE_FUNC (handle_statfile) { return set_string_arg (&conf->statpage, line, &match[2]); } static HANDLE_FUNC (handle_stathost) { int r = set_string_arg (&conf->stathost, line, &match[2]); if (r) return r; log_message (LOG_INFO, "Stathost set to \"%s\"", conf->stathost); return 0; } static HANDLE_FUNC (handle_xtinyproxy) { #ifdef XTINYPROXY_ENABLE return set_bool_arg (&conf->add_xtinyproxy, line, &match[2]); #else fprintf (stderr, "XTinyproxy NOT Enabled! Recompile with --enable-xtinyproxy\n"); return 1; #endif } static HANDLE_FUNC (handle_syslog) { #ifdef HAVE_SYSLOG_H return set_bool_arg (&conf->syslog, line, &match[2]); #else fprintf (stderr, "Syslog support not compiled in executable.\n"); return 1; #endif } static HANDLE_FUNC (handle_bindsame) { int r = set_bool_arg (&conf->bindsame, line, &match[2]); if (r) return r; log_message (LOG_INFO, "Binding outgoing connection to incoming IP"); return 0; } static HANDLE_FUNC (handle_port) { set_int_arg (&conf->port, line, &match[2]); if (conf->port > 65535) { fprintf (stderr, "Bad port number (%d) supplied for Port.\n", conf->port); return 1; } return 0; } static HANDLE_FUNC (handle_maxclients) { child_configure (CHILD_MAXCLIENTS, get_long_arg (line, &match[2])); return 0; } static HANDLE_FUNC (handle_maxspareservers) { child_configure (CHILD_MAXSPARESERVERS, get_long_arg (line, &match[2])); return 0; } static HANDLE_FUNC (handle_minspareservers) { child_configure (CHILD_MINSPARESERVERS, get_long_arg (line, &match[2])); return 0; } static HANDLE_FUNC (handle_startservers) { child_configure (CHILD_STARTSERVERS, get_long_arg (line, &match[2])); return 0; } static HANDLE_FUNC (handle_maxrequestsperchild) { child_configure (CHILD_MAXREQUESTSPERCHILD, get_long_arg (line, &match[2])); return 0; } static HANDLE_FUNC (handle_timeout) { return set_int_arg (&conf->idletimeout, line, &match[2]); } static HANDLE_FUNC (handle_connectport) { add_connect_port_allowed (get_long_arg (line, &match[2]), &conf->connect_ports); return 0; } static HANDLE_FUNC (handle_user) { return set_string_arg (&conf->user, line, &match[2]); } static HANDLE_FUNC (handle_group) { return set_string_arg (&conf->group, line, &match[2]); } static HANDLE_FUNC (handle_allow) { char *arg = get_string_arg (line, &match[2]); insert_acl (arg, ACL_ALLOW, &conf->access_list); safefree (arg); return 0; } static HANDLE_FUNC (handle_deny) { char *arg = get_string_arg (line, &match[2]); insert_acl (arg, ACL_DENY, &conf->access_list); safefree (arg); return 0; } static HANDLE_FUNC (handle_bind) { #ifndef TRANSPARENT_PROXY int r = set_string_arg (&conf->bind_address, line, &match[2]); if (r) return r; log_message (LOG_INFO, "Outgoing connections bound to IP %s", conf->bind_address); return 0; #else fprintf (stderr, "\"Bind\" cannot be used with transparent support enabled.\n"); return 1; #endif } static HANDLE_FUNC (handle_listen) { char *arg = get_string_arg (line, &match[2]); if (arg == NULL) { return -1; } if (conf->listen_addrs == NULL) { conf->listen_addrs = vector_create(); if (conf->listen_addrs == NULL) { log_message(LOG_WARNING, "Could not create a list " "of listen addresses."); return -1; } } vector_append (conf->listen_addrs, arg, strlen(arg) + 1); log_message(LOG_INFO, "Added address [%s] to listen addresses.", arg); safefree (arg); return 0; } static HANDLE_FUNC (handle_errorfile) { /* * Because an integer is defined as ((0x)?[[:digit:]]+) _two_ * match places are used. match[2] matches the full digit * string, while match[3] matches only the "0x" part if * present. This is why the "string" is located at * match[4] (rather than the more intuitive match[3]. */ unsigned long int err = get_long_arg (line, &match[2]); char *page = get_string_arg (line, &match[4]); add_new_errorpage (page, err); safefree (page); return 0; } static HANDLE_FUNC (handle_addheader) { char *name = get_string_arg (line, &match[2]); char *value = get_string_arg (line, &match[3]); http_header_t *header; if (!conf->add_headers) { conf->add_headers = vector_create (); } header = (http_header_t *) safemalloc (sizeof (http_header_t)); header->name = name; header->value = value; vector_prepend (conf->add_headers, header, sizeof *header); safefree (header); /* Don't free name or value here, as they are referenced in the * struct inserted into the vector. */ return 0; } /* * Log level's strings. */ struct log_levels_s { const char *string; int level; }; static struct log_levels_s log_levels[] = { {"critical", LOG_CRIT}, {"error", LOG_ERR}, {"warning", LOG_WARNING}, {"notice", LOG_NOTICE}, {"connect", LOG_CONN}, {"info", LOG_INFO} }; static HANDLE_FUNC (handle_loglevel) { static const unsigned int nlevels = sizeof (log_levels) / sizeof (log_levels[0]); unsigned int i; char *arg = get_string_arg (line, &match[2]); for (i = 0; i != nlevels; ++i) { if (!strcasecmp (arg, log_levels[i].string)) { set_log_level (log_levels[i].level); safefree (arg); return 0; } } safefree (arg); return -1; } #ifdef FILTER_ENABLE static HANDLE_FUNC (handle_filter) { return set_string_arg (&conf->filter, line, &match[2]); } static HANDLE_FUNC (handle_filterurls) { return set_bool_arg (&conf->filter_url, line, &match[2]); } static HANDLE_FUNC (handle_filterextended) { return set_bool_arg (&conf->filter_extended, line, &match[2]); } static HANDLE_FUNC (handle_filterdefaultdeny) { assert (match[2].rm_so != -1); if (get_bool_arg (line, &match[2])) filter_set_default_policy (FILTER_DEFAULT_DENY); return 0; } static HANDLE_FUNC (handle_filtercasesensitive) { return set_bool_arg (&conf->filter_casesensitive, line, &match[2]); } #endif #ifdef REVERSE_SUPPORT static HANDLE_FUNC (handle_reverseonly) { return set_bool_arg (&conf->reverseonly, line, &match[2]); } static HANDLE_FUNC (handle_reversemagic) { return set_bool_arg (&conf->reversemagic, line, &match[2]); } static HANDLE_FUNC (handle_reversebaseurl) { return set_string_arg (&conf->reversebaseurl, line, &match[2]); } static HANDLE_FUNC (handle_reversepath) { /* * The second string argument is optional. */ char *arg1, *arg2; arg1 = get_string_arg (line, &match[2]); if (!arg1) return -1; if (match[4].rm_so != -1) { arg2 = get_string_arg (line, &match[4]); if (!arg2) { safefree (arg1); return -1; } reversepath_add (arg1, arg2, &conf->reversepath_list); safefree (arg1); safefree (arg2); } else { reversepath_add (NULL, arg1, &conf->reversepath_list); safefree (arg1); } return 0; } #endif #ifdef UPSTREAM_SUPPORT static HANDLE_FUNC (handle_upstream) { char *ip; int port; char *domain; ip = get_string_arg (line, &match[2]); if (!ip) return -1; port = (int) get_long_arg (line, &match[7]); if (match[10].rm_so != -1) { domain = get_string_arg (line, &match[10]); if (domain) { upstream_add (ip, port, domain, &conf->upstream_list); safefree (domain); } } else { upstream_add (ip, port, NULL, &conf->upstream_list); } safefree (ip); return 0; } static HANDLE_FUNC (handle_upstream_no) { char *domain; domain = get_string_arg (line, &match[2]); if (!domain) return -1; upstream_add (NULL, 0, domain, &conf->upstream_list); safefree (domain); return 0; } #endif