Protocol

lgo_Protocol()

Determine the protocol used on a connection.

#include "laygo.h"

LProtocol lgo_Protocol
    (
          LCid    cid
    );

cid	connection on which to determine protocol used

lgo_Protocol() determines the protocol used on a connection.

If successful, lgo_Protocol() returns a non-negative protocol identifier which identifies the protocol used on connections opened to that service. Possible successful return values are:

lgo_PROTOCOL_X21_BIS
lgo_PROTOCOL_HDLC_LAPB
lgo_PROTOCOL_X25_MAJOR_DEVICE
lgo_PROTOCOL_X25_PVC
lgo_PROTOCOL_X25_SVC
lgo_PROTOCOL_FRAME_RELAY_MAJOR_DEVICE
lgo_PROTOCOL_FRAME_RELAY_VC

Otherwise, it returns a negative value indicating the reason it failed. Possible unsuccessful return values are:

lgo_ERROR_INVALID_CID

lgo_ProtocolMessage()

printf("The protocol of CID %d is %s\n", (int) cid, lgo_ProtocolMessage(lgo_Protocol(cid));