+sub sip2_socket {
+
+ return $sip2->{sock} if exists $sip2->{sock} && $sip2->{sock}->connected;
+
+ if ( my $server = $sip2->{server} ) {
+ my $sock = $sip2->{sock} = IO::Socket::INET->new( $server ) || die "can't connect to $server: $!";
+ warn "SIP2 server ", $sock->peerhost, ":", $sock->peerport, "\n";
+
+ # login
+ if ( sip2_message("9300CN$sip2->{user}|CO$sip2->{password}|")->{fixed} !~ m/^941/ ) {
+ die "SIP2 login failed";
+ }
+
+ }
+ return $sip2->{sock};
+}
+