mirror of
https://github.com/NLnetLabs/unbound.git
synced 2024-09-22 15:17:09 +00:00
1315edc5e9
git-svn-id: file:///svn/unbound/trunk@843 be551aaa-1e26-0410-a405-d3ace91eadb9
452 lines
11 KiB
C
452 lines
11 KiB
C
/*
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* util/config_file.c - reads and stores the config file for unbound.
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*
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* Copyright (c) 2007, NLnet Labs. All rights reserved.
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*
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* This software is open source.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of the NLNET LABS nor the names of its contributors may
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* be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* \file
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*
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* This file contains functions for the config file.
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*/
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#include "config.h"
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#include "util/log.h"
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#include "util/configyyrename.h"
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#include "util/config_file.h"
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#include "util/configparser.h"
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#include "util/net_help.h"
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/** global config during parsing */
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struct config_parser_state* cfg_parser = 0;
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/** lex in file */
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extern FILE* ub_c_in;
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/** lex out file */
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extern FILE* ub_c_out;
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/** the yacc lex generated parse function */
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int ub_c_parse(void);
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/** the lexer function */
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int ub_c_lex(void);
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/** wrap function */
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int ub_c_wrap(void);
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/** print error with file and line number */
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void ub_c_error(const char *message);
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struct config_file*
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config_create()
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{
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struct config_file* cfg;
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cfg = (struct config_file*)calloc(1, sizeof(struct config_file));
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if(!cfg)
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return NULL;
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/* the defaults if no config is present */
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cfg->verbosity = 1;
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cfg->num_threads = 1;
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cfg->port = UNBOUND_DNS_PORT;
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cfg->do_ip4 = 1;
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cfg->do_ip6 = 1;
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cfg->do_udp = 1;
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cfg->do_tcp = 1;
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cfg->use_syslog = 1;
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cfg->outgoing_base_port = cfg->port + 2000;
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cfg->outgoing_num_ports = 16;
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cfg->outgoing_num_tcp = 10;
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cfg->incoming_num_tcp = 10;
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cfg->msg_buffer_size = 65552; /* 64 k + a small margin */
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cfg->msg_cache_size = 4 * 1024 * 1024;
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cfg->msg_cache_slabs = 4;
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cfg->num_queries_per_thread = 1024;
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cfg->rrset_cache_size = 4 * 1024 * 1024;
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cfg->rrset_cache_slabs = 4;
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cfg->host_ttl = 900;
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cfg->lame_ttl = 900;
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cfg->bogus_ttl = 900;
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cfg->max_ttl = 3600 * 24;
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cfg->infra_cache_slabs = 4;
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cfg->infra_cache_numhosts = 10000;
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cfg->infra_cache_lame_size = 10240; /* easily 40 or more entries */
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if(!(cfg->username = strdup("unbound"))) goto error_exit;
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if(!(cfg->chrootdir = strdup("/etc/unbound"))) goto error_exit;
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if(!(cfg->directory = strdup("/etc/unbound"))) goto error_exit;
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if(!(cfg->logfile = strdup(""))) goto error_exit;
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if(!(cfg->pidfile = strdup("/etc/unbound/unbound.pid")))
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goto error_exit;
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if(!(cfg->target_fetch_policy = strdup("3 2 1 0 0"))) goto error_exit;
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cfg->donotqueryaddrs = NULL;
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cfg->donotquery_localhost = 1;
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cfg->root_hints = NULL;
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cfg->do_daemonize = 1;
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cfg->num_ifs = 0;
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cfg->ifs = NULL;
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cfg->num_out_ifs = 0;
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cfg->out_ifs = NULL;
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cfg->stubs = NULL;
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cfg->forwards = NULL;
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cfg->acls = NULL;
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cfg->harden_short_bufsize = 0;
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cfg->harden_large_queries = 0;
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cfg->harden_glue = 1;
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cfg->harden_dnssec_stripped = 1;
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cfg->hide_identity = 0;
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cfg->hide_version = 0;
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cfg->identity = NULL;
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cfg->version = NULL;
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cfg->trust_anchor_file_list = NULL;
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cfg->trust_anchor_list = NULL;
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cfg->trusted_keys_file_list = NULL;
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cfg->val_date_override = 0;
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cfg->val_clean_additional = 1;
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cfg->val_permissive_mode = 0;
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cfg->key_cache_size = 4 * 1024 * 1024;
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cfg->key_cache_slabs = 4;
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cfg->local_zones = NULL;
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cfg->local_zones_nodefault = NULL;
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cfg->local_data = NULL;
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if(!(cfg->module_conf = strdup("validator iterator"))) goto error_exit;
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if(!(cfg->val_nsec3_key_iterations =
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strdup("1024 150 2048 500 4096 2500"))) goto error_exit;
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return cfg;
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error_exit:
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config_delete(cfg);
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return NULL;
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}
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struct config_file* config_create_forlib()
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{
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struct config_file* cfg = config_create();
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if(!cfg) return NULL;
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/* modifications for library use, less verbose, less memory */
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cfg->verbosity = 0;
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cfg->outgoing_num_tcp = 2;
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cfg->msg_cache_size = 1024*1024;
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cfg->msg_cache_slabs = 1;
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cfg->rrset_cache_size = 1024*1024;
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cfg->rrset_cache_slabs = 1;
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cfg->infra_cache_slabs = 1;
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cfg->use_syslog = 0;
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cfg->key_cache_size = 1024*1024;
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cfg->key_cache_slabs = 1;
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return cfg;
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}
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/** initialize the global cfg_parser object */
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static void
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create_cfg_parser(struct config_file* cfg, char* filename)
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{
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static struct config_parser_state st;
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cfg_parser = &st;
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cfg_parser->filename = filename;
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cfg_parser->line = 1;
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cfg_parser->errors = 0;
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cfg_parser->cfg = cfg;
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}
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int
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config_read(struct config_file* cfg, char* filename)
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{
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FILE *in;
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if(!filename)
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return 1;
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in = fopen(filename, "r");
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if(!in) {
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log_err("Could not open %s: %s", filename, strerror(errno));
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return 0;
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}
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create_cfg_parser(cfg, filename);
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ub_c_in = in;
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ub_c_parse();
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fclose(in);
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if(cfg_parser->errors != 0) {
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fprintf(stderr, "read %s failed: %d errors in configuration file\n",
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cfg_parser->filename, cfg_parser->errors);
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return 0;
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}
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return 1;
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}
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void
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config_delstrlist(struct config_strlist* p)
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{
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struct config_strlist *np;
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while(p) {
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np = p->next;
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free(p->str);
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free(p);
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p = np;
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}
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}
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void
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config_deldblstrlist(struct config_str2list* p)
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{
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struct config_str2list *np;
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while(p) {
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np = p->next;
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free(p->str);
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free(p->str2);
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free(p);
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p = np;
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}
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}
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/** delete config stublist */
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static void
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config_delstubs(struct config_stub* p)
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{
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struct config_stub* np;
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while(p) {
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np = p->next;
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free(p->name);
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config_delstrlist(p->hosts);
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config_delstrlist(p->addrs);
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free(p);
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p = np;
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}
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}
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void
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config_delete(struct config_file* cfg)
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{
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if(!cfg) return;
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free(cfg->username);
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free(cfg->chrootdir);
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free(cfg->directory);
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free(cfg->logfile);
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free(cfg->pidfile);
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free(cfg->target_fetch_policy);
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if(cfg->ifs) {
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int i;
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for(i=0; i<cfg->num_ifs; i++)
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free(cfg->ifs[i]);
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free(cfg->ifs);
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}
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if(cfg->out_ifs) {
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int i;
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for(i=0; i<cfg->num_out_ifs; i++)
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free(cfg->out_ifs[i]);
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free(cfg->out_ifs);
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}
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config_delstubs(cfg->stubs);
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config_delstubs(cfg->forwards);
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config_delstrlist(cfg->donotqueryaddrs);
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config_delstrlist(cfg->root_hints);
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free(cfg->identity);
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free(cfg->version);
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free(cfg->module_conf);
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config_delstrlist(cfg->trust_anchor_file_list);
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config_delstrlist(cfg->trusted_keys_file_list);
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config_delstrlist(cfg->trust_anchor_list);
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config_deldblstrlist(cfg->acls);
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free(cfg->val_nsec3_key_iterations);
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config_deldblstrlist(cfg->local_zones);
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config_delstrlist(cfg->local_zones_nodefault);
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config_delstrlist(cfg->local_data);
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free(cfg);
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}
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/** print error with file and line number */
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void ub_c_error_va_list(const char *fmt, va_list args)
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{
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cfg_parser->errors++;
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fprintf(stderr, "%s:%d: error: ", cfg_parser->filename,
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cfg_parser->line);
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vfprintf(stderr, fmt, args);
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fprintf(stderr, "\n");
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}
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/** print error with file and line number */
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void ub_c_error_msg(const char* fmt, ...)
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{
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va_list args;
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va_start(args, fmt);
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ub_c_error_va_list(fmt, args);
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va_end(args);
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}
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void ub_c_error(const char *str)
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{
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cfg_parser->errors++;
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fprintf(stderr, "%s:%d: error: %s\n", cfg_parser->filename,
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cfg_parser->line, str);
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}
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int ub_c_wrap()
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{
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return 1;
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}
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int
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cfg_strlist_insert(struct config_strlist** head, char* item)
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{
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struct config_strlist *s;
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if(!item || !head)
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return 0;
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s = (struct config_strlist*)calloc(1, sizeof(struct config_strlist));
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if(!s)
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return 0;
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s->str = item;
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s->next = *head;
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*head = s;
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return 1;
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}
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int
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cfg_str2list_insert(struct config_str2list** head, char* item, char* i2)
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{
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struct config_str2list *s;
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if(!item || !i2 || !head)
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return 0;
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s = (struct config_str2list*)calloc(1, sizeof(struct config_str2list));
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if(!s)
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return 0;
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s->str = item;
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s->str2 = i2;
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s->next = *head;
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*head = s;
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return 1;
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}
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uint32_t
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cfg_convert_timeval(const char* str)
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{
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uint32_t t;
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struct tm tm;
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memset(&tm, 0, sizeof(tm));
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if(strlen(str) < 14)
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return 0;
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if(sscanf(str, "%4d%2d%2d%2d%2d%2d", &tm.tm_year, &tm.tm_mon,
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&tm.tm_mday, &tm.tm_hour, &tm.tm_min, &tm.tm_sec) != 6)
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return 0;
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tm.tm_year -= 1900;
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tm.tm_mon--;
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/* Check values */
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if (tm.tm_year < 70) return 0;
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if (tm.tm_mon < 0 || tm.tm_mon > 11) return 0;
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if (tm.tm_mday < 1 || tm.tm_mday > 31) return 0;
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if (tm.tm_hour < 0 || tm.tm_hour > 23) return 0;
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if (tm.tm_min < 0 || tm.tm_min > 59) return 0;
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if (tm.tm_sec < 0 || tm.tm_sec > 59) return 0;
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/* call ldns conversion function */
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t = mktime_from_utc(&tm);
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return t;
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}
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int
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cfg_count_numbers(const char* s)
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{
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/* format ::= (sp num)+ sp */
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/* num ::= [-](0-9)+ */
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/* sp ::= (space|tab)* */
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int num = 0;
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while(*s) {
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while(*s && isspace((int)*s))
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s++;
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if(!*s) /* end of string */
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break;
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if(*s == '-')
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s++;
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if(!*s) /* only - not allowed */
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return 0;
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if(!isdigit((int)*s)) /* bad character */
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return 0;
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while(*s && isdigit((int)*s))
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s++;
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num++;
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}
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return num;
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}
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/** all digit number */
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static int isalldigit(const char* str, size_t l)
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{
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size_t i;
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for(i=0; i<l; i++)
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if(!isdigit(str[i]))
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return 0;
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return 1;
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}
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int
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cfg_parse_memsize(const char* str, size_t* res)
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{
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size_t len = (size_t)strlen(str);
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size_t mult = 1;
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if(!str || len == 0) {
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log_err("not a size: '%s'", str);
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return 0;
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}
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if(isalldigit(str, len)) {
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*res = (size_t)atol(str);
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return 1;
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}
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/* check appended num */
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while(len>0 && str[len-1]==' ')
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len--;
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if(len > 1 && str[len-1] == 'b')
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len--;
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else if(len > 1 && str[len-1] == 'B')
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len--;
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if(len > 1 && tolower(str[len-1]) == 'g')
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mult = 1024*1024*1024;
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else if(len > 1 && tolower(str[len-1]) == 'm')
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mult = 1024*1024;
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else if(len > 1 && tolower(str[len-1]) == 'k')
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mult = 1024;
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else if(len > 0 && isdigit(str[len-1]))
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mult = 1;
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else {
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log_err("unknown size specifier: '%s'", str);
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return 0;
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}
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while(len>1 && str[len-2]==' ')
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len--;
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if(!isalldigit(str, len-1)) {
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log_err("unknown size specifier: '%s'", str);
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return 0;
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}
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*res = ((size_t)atol(str)) * mult;
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return 1;
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}
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/** the MAX_TTL global */
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extern uint32_t MAX_TTL;
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void
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config_apply(struct config_file* config)
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{
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MAX_TTL = (uint32_t)config->max_ttl;
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}
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