tfDnsGetMailHost

Table of Contents >> Application Reference >> DNS Resolver

#include <trsocket.h>

int tfDnsGetMailHost	(
	const char * hostnameStr,
	ttUserIpAddressPtr ipAddressPtr,
	unsigned short * mxPrefPtr
	);

Function Description

This function retrieves the IPv4 address of the first MX record for this hostname.

Parameters

• hostnameStr

  Hostname to resolve.

• ipAddressPtr

  Set to the IPv4 address of the host.

• mxPrefPtr

  Set to the preference value of the mail host.

Returns

• TM_EINVAL

  The hostname string or IP address pointer was invalid.

• TM_EWOULDBLOCK

  There is currently a DNS lookup in progress. The user should continue to call tfDnsGetMailHost() with the same parameters until it returns a value other than TM_EWOULDBLOCK. This is only returned when the resolver is operating in non-blocking mode.

• TM_ENOERROR

  The DNS lookup was successful. The IP address is stored in ipAddressPtr and the preference value is stored in mxPrefPtr.

Table of Contents >> Application Reference >> DNS Resolver