apps/resolv/resolv.c File Reference

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Detailed Description

DNS host name to IP address resolver.

Author:

Adam Dunkels <adam@dunkels.com>

This file implements a DNS host name to IP address resolver.

Definition in file resolv.c.

#include "resolv.h"
#include "uip.h"
#include <string.h>

Go to the source code of this file.

Defines
#define	NULL   (void *)0
#define	MAX_RETRIES   8
#define	DNS_FLAG1_RESPONSE   0x80
#define	DNS_FLAG1_OPCODE_STATUS   0x10
#define	DNS_FLAG1_OPCODE_INVERSE   0x08
#define	DNS_FLAG1_OPCODE_STANDARD   0x00
#define	DNS_FLAG1_AUTHORATIVE   0x04
#define	DNS_FLAG1_TRUNC   0x02
#define	DNS_FLAG1_RD   0x01
#define	DNS_FLAG2_RA   0x80
#define	DNS_FLAG2_ERR_MASK   0x0f
#define	DNS_FLAG2_ERR_NONE   0x00
#define	DNS_FLAG2_ERR_NAME   0x03
#define	STATE_UNUSED   0
#define	STATE_NEW   1
#define	STATE_ASKING   2
#define	STATE_DONE   3
#define	STATE_ERROR   4
#define	RESOLV_ENTRIES   4
Functions
void	resolv_appcall (void)
void	resolv_query (char *name)
	Queues a name so that a question for the name will be sent out.
u16_t *	resolv_lookup (char *name)
	Look up a hostname in the array of known hostnames.
u16_t *	resolv_getserver (void)
	Obtain the currently configured DNS server.
void	resolv_conf (u16_t *dnsserver)
	Configure which DNS server to use for queries.
void	resolv_init (void)
	Initalize the resolver.

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