n_dns.c File Reference

Minimal DNS message helpers implementation. More...

#include "nilorea/n_dns.h"
#include <string.h>

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Macros
#define	N_DNS_HEADER_LEN   12
	DNS header size in bytes (id, flags, and the four section counts).

Functions
int	n_dns_build_a_response (const unsigned char *query, size_t qlen, uint32_t ipv4_be, uint32_t ttl, unsigned char *out, size_t outsz)
	Build a DNS response answering a query's first question with one A record.
int	n_dns_parse_query (const unsigned char *msg, size_t len, uint16_t *id_out, char *qname_out, size_t qname_sz, uint16_t *qtype_out)
	Parse the header id and the first question (QNAME + QTYPE) of a DNS message.
static uint16_t	n_dns_u16 (const unsigned char *msg, size_t off)

Detailed Description

Minimal DNS message helpers implementation.

Author

Castagnier Mickael

Version

1.0

Definition in file n_dns.c.

Macro Definition Documentation

N_DNS_HEADER_LEN

#define N_DNS_HEADER_LEN   12

DNS header size in bytes (id, flags, and the four section counts).

Definition at line 32 of file n_dns.c.

Function Documentation

n_dns_u16()

static uint16_t n_dns_u16 ( const unsigned char *  msg, size_t  off  )

static

Definition at line 35 of file n_dns.c.

Referenced by n_dns_build_a_response(), and n_dns_parse_query().

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