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Man Pages


Manual Reference Pages  -  LIBOWFAT_DNS_MX (3)

NAME

dns_mx - look up Mail eXchanger

CONTENTS

Syntax
Description

SYNTAX

#include <dns.h>

int dns_mx(stralloc* out,stralloc* fqdn);

DESCRIPTION

dns_mx looks up MX records for the fully-qualified domain name in fqdn. It puts the MX records into out and returns 0. Each MX record is a two-byte MX distance (big endian) followed by a \0-terminated dot-encoded domain name. If the domain does not exist in DNS, or has no MX records, out will be empty.

If dns_mx has trouble with the DNS lookup or runs out of memory, it returns -1, setting errno appropriately. It may or may not change out.

SEE ALSO

dns_mx_packet(3), dns_ip4(3), dns_ip6(3)
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