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- /* NBRCV2.C - sample program - receives NetBIOS datagram. - */
- /* Paul McGinnis - AST Research, Data Comm Support - Dept. 430 */
- /* Sept. 1988. - comments added 9/26/88 */
- /* */
- /* General calling sequence for NetBIOS calls: */
- /* 1. Set up NCB (Network Control Block) */
- /* 2. Make ES:BX point to NCB structure */
- /* 3. Load AX with 100h */
- /* 4. Generate an INT 5Ch */
- /* */
- /* NetBIOS commands and definitions in NETBIOS.H */
- /* */
- /* Compilation information: */
- /* Compiler: Borland Turbo C v1.5 */
- /* Memory model: Small */
- /* Floating point support: none */
-
-
-
- #include <dos.h>
- #include <stdio.h>
- #include <netbios.h>
- #include <stdlib.h>
- #include <string.h>
-
-
- main()
- {
- NCB * rcv_block;
- char * rcv_message;
- char * session;
- char * sender;
- unsigned char ret_code, net_num, iflag;
- rcv_block = (NCB *) malloc(sizeof(NCB));
- rcv_message = (char *) malloc(80);
- session = (char *) malloc(16);
- sender = (char *) malloc(16);
- _AH = 0;
- geninterrupt(0x2a); /* Check to see if NetBIOS is loaded */
- iflag = _AH;
- if (!iflag)
- {
- puts(" *** ERROR - NetBIOS not installed. ***");
- return;
- }
- printf("Enter network name: ");
- gets(session);
- printf("Enter sender's name: ");
- gets(sender);
- puts("Generating network name...");
- rcv_block -> NCB_COMMAND = ADD_NAME_WAIT;
- rcv_block -> NCB_LANA_NUM = 0;
- rcv_block -> NCB_STO = 0;
- rcv_block -> NCB_RTO = 0;
- strncpy(rcv_block -> NCB_NAME, session, 16);
- strncpy(rcv_block -> NCB_CALLNAME, "*", 16);
- _ES = _DS;
- _BX = rcv_block;
- _AX = 0x100;
- geninterrupt(0x5c);
- ret_code = _AL;
- net_num = rcv_block -> NCB_NUM;
- if (ret_code)
- {
- printf("Bad return code = %02Xh\n", ret_code);
- return;
- }
- printf("Session established. Name number = %02Xh\n", net_num);
- puts("Waiting for datagram...");
- rcv_block -> NCB_RTO = 0;
- strncpy(rcv_block -> NCB_CALLNAME, sender, 16);
- rcv_block -> NCB_BUFFER_OFFSET = rcv_message;
- rcv_block -> NCB_BUFFER_SEGMENT = _DS;
- rcv_block -> NCB_LENGTH = 80;
- rcv_block -> NCB_COMMAND = RECEIVE_DATAGRAM_WAIT;
- _ES = _DS;
- _BX = rcv_block;
- _AX = 0x100;
- geninterrupt(0x5c);
- ret_code = _AL;
- pokeb(_DS, rcv_message + rcv_block -> NCB_LENGTH, 0); /* end buffer with 0 */
- if (ret_code)
- printf("Error number = %02Xh\n", ret_code);
- else
- {
- printf("%c*** %s\n", 7, rcv_message);
- printf("From: %s\n", rcv_block -> NCB_CALLNAME);
- }
- printf("Releasing session >>>%s<<<, number %02Xh\n",
- rcv_block -> NCB_NAME, net_num);
- rcv_block -> NCB_NUM = net_num;
- rcv_block -> NCB_COMMAND = DELETE_NAME_WAIT;
- _ES = _DS;
- _BX = rcv_block;
- _AX = 0x100;
- geninterrupt(0x5c);
- ret_code = _AL;
- if (ret_code)
- printf("Error number = %02Xh.\n", ret_code);
- else
- puts("Completed normally.");
- }