dns.c File Reference

#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/nameser.h>
#include <resolv.h>
#include <unistd.h>
#include <asterisk/logger.h>
#include <asterisk/channel.h>
#include <asterisk/dns.h>

Include dependency graph for dns.c:

Go to the source code of this file.

Data Structures
struct	dns_HEADER
struct	dn_answer
Defines
#define	MAX_SIZE   4096
Functions
	AST_MUTEX_DEFINE_STATIC (res_lock)
int	ast_search_dns (void *context, const char *dname, int class, int type, int(*callback)(void *context, u_char *answer, int len, u_char *fullanswer))
Variables
dn_answer	__packed__

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Define Documentation

#define MAX_SIZE   4096

Definition at line 23 of file dns.c. Referenced by ast_search_dns().

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Function Documentation

AST_MUTEX_DEFINE_STATIC (  res_lock   )

int ast_search_dns (  void *  context, const char *  dname, int  class, int  type, int(*  callback)(void *context, u_char *answer, int len, u_char *fullanswer) )

Definition at line 163 of file dns.c. References ast_log(), ast_mutex_lock, ast_mutex_unlock, LOG_DEBUG, LOG_WARNING, MAX_SIZE, and type. Referenced by ast_get_enum(), ast_get_srv(), and ast_get_txt(). { #ifdef HAS_RES_NINIT struct __res_state dnsstate; #endif char answer[MAX_SIZE]; int res, ret = -1; #ifdef HAS_RES_NINIT res_ninit(&dnsstate); res = res_nsearch(&dnsstate, dname, class, type, answer, sizeof(answer)); #else ast_mutex_lock(&res_lock); res_init(); res = res_search(dname, class, type, answer, sizeof(answer)); #endif if (res > 0) { if ((res = dns_parse_answer(context, class, type, answer, res, callback)) < 0) { ast_log(LOG_WARNING, "Parse error\n"); ret = -1; } else if (ret == 0) { ast_log(LOG_DEBUG, "No matches found\n"); ret = 0; } else ret = 1; } #ifdef HAS_RES_NINIT res_nclose(&dnsstate); #else #ifndef __APPLE__ res_close(); #endif ast_mutex_unlock(&res_lock); #endif return ret; }

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Variable Documentation

struct dn_answer __packed__

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