These four procedures return information about the endpoints of a socket connection.

Each routine requires a single argument, which is a valid socket ID for an open connection. Either a string or a positive integer is returned, depending upon the type of information requested.

The procedure GetLocalHost returns the hostname of the local endpoint in a socket connection, while GetPeerHost returns the hostname of the peer side of the connection. In each case, the hostname is returned in the form of a string.

Port numbers for the local and remote endpoints are obtained as positive Maple integers by using the routines GetLocalPort and GetPeerPort, respectively.

$\mathrm{with}\left(\mathrm{Sockets}\right)\:$

$\mathrm{sid}≔\mathrm{Open}\left(''mantis''\,''echo''\right)$

$0$

$\mathrm{GetLocalHost}\left(\mathrm{sid}\right)$

$''rdubtroll4.maplesoft.com''$

$\mathrm{GetLocalPort}\left(\mathrm{sid}\right)$

$52730$

$\mathrm{GetPeerHost}\left(\mathrm{sid}\right)$

$''mapletest.maplesoft.com''$

$\mathrm{GetPeerPort}\left(\mathrm{sid}\right)$

$7$

$\mathrm{LookupService}\left(''echo''\right)$

$7$

$\mathrm{Close}\left(\mathrm{sid}\right)$

$\mathrm{true}$