NAME¶
dns_mx - look up Mail eXchanger
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)
