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-/*
-* Copyright (C) 2009-2010 Mamadou Diop.
-*
-* Contact: Mamadou Diop <diopmamadou(at)doubango.org>
-*
-* This file is part of Open Source Doubango Framework.
-*
-* DOUBANGO 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 3 of the License, or
-* (at your option) any later version.
-*
-* DOUBANGO 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 DOUBANGO.
-*
-*/
-/**@file tnet_dns_resolvconf.c
- * @brief Parser for "/etc/resolv.conf" file to retrive DNS servers.
- *
- * @author Mamadou Diop <diopmamadou(at)doubango.org>
- *
- * @date Created: Sat Nov 8 16:54:58 2009 mdiop
- */
-#include "tnet_dns_resolvconf.h"
-
-#include "tnet_utils.h"
-
-#include "dns/tnet_dns.h"
-
-#include "tsk_string.h"
-#include "tsk_memory.h"
-#include "tsk_ragel_state.h"
-#include "tsk_debug.h"
-
-#include <string.h>
-
-
-/* === Ragel state machine === */
-%%{
- machine tdns_machine_resolvconf;
-
- action tag{
- tag_start = p;
- }
-
- action add_dns{
- int len = (int)(p - tag_start);
- if(len && len<=sizeof(ip)){
- tnet_address_t *address;
- memset(ip, '\0', sizeof(ip));
- memcpy(ip, tag_start, len);
-
- address = tnet_address_create(ip);
- address->family = tnet_get_family(ip, TNET_DNS_SERVER_PORT_DEFAULT);
- address->dnsserver = 1;
- tsk_list_push_ascending_data(servers, (void**)&address);
- }
- }
-
- SP = " ";
- LF = "\n";
- CR = "\r";
- CRLF = CR LF;
- ENDL = (LF | CR | CRLF);
-
- o_name = any+;
- o_value = any+;
-
- COMMENT = SP*<: "#" any*;
- OPTION_ANY = SP*<: o_name :>SP+<: o_value :>SP*;
- OPTION_DNS = SP*<: "nameserver"i :>SP+<: o_value>tag %add_dns :>SP*;
- LINE = (OPTION_DNS)@100 | (OPTION_ANY)@0 | (COMMENT)@50;
-
- main := ((LINE :>ENDL) | ENDL)* %3 any* %2;
-}%%
-
-/** Gets list of DNS servers from a conf file.
-* @param path Path of the conf file from which to retrieve the DNS servers.
-* should be @a "/etc/resolv.conf". You can adjust the value by modifying @ref TNET_RESOLV_CONF_PATH.<br>
-* If you are using <b>Android</b> and the resolv.conf file is missing, then run the following line in a command window: <br>
-* <i>ln -s /private/var/run/resolv.conf /etc/resolv.conf</i><br> If this fails, then try to manually add the file.
-* @retval List of DNS servers.
-*/
-tnet_addresses_L_t * tnet_dns_resolvconf_parse(const char* path)
-{
- tnet_addresses_L_t* servers = tsk_null;
- tnet_ip_t ip;
- const char* fullpath = path;
- const char* tag_start;
- FILE* fd;
- char buf[4092];
-
- // Ragel
- int cs = 0;
- const char *p;
- const char *pe;
- const char *eof;
-
- %%write data;
-
- if(tsk_strnullORempty(fullpath)){
- fullpath = TNET_RESOLV_CONF_PATH;
- }
-
- /* Open the file and read all data */
- if((fd = fopen(fullpath, "r"))){
- int len = fread(buf, sizeof(uint8_t), sizeof(buf)-2, fd);
- p = &buf[0];
- pe = p + len + 1/*hack*/;
- eof = pe;
- fclose(fd);
-
- buf[len] = '\n'; // hack to have perfect lines
-
- servers = tsk_list_create();
- }
- else{
-#if ANDROID
- TSK_DEBUG_INFO("Failed to open [%s]. But don't panic, we have detected that you are using Google Android System.\n"
- "You should look at the Progammer's Guide for more information.\n If you are not using DNS functions, don't worry about this warning.",
- fullpath);
-#else
- TSK_DEBUG_ERROR("Failed to open %s.", fullpath);
-#endif
- goto bail;
- }
-
- %%write init;
- %%write exec;
-
- if( cs < %%{ write first_final; }%% ){
- TSK_DEBUG_ERROR("Failed to parse %s.", fullpath);
- TSK_OBJECT_SAFE_FREE(servers);
- }
-
-bail:
- return servers;
-}
-
-
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