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Sample TCP/IP Communication Programs

On the following pages are four pieces of sample code written in

Berkeley Sockets as an example of the type of custom code which

must be written so that the Serial Adapter can communicate with

nodes on an Ethernet network.

Note:

If your custom program makes use of the “$QUIT”

command so that the Serial Adapter will close open TCP

connections, set the TCP Close Connection Signal pa-

rameter to “Yes” within the Serial Adapter’s Advanced

Configuration Menu.

Sample TCP Receive Program

1 /*******************************************************

2 * tcprecv.c

3 * Receives messages from one or more Serial Adapters using TCP

4 *

5 *******************************************************/

7 #include <sys/types.h>

8 #include <sys/socket.h>

9 #include <netinet/in.h>

10 #include <netdb.h>

11 #include <stdio.h>

13 #define TRUE 1

15 main()

16 {

17 int i, sock, length;

18 struct sockaddr_in server;

19 int msgsock;

20 char buf[1024];

21 int rval;

22 FILE *logfile;

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