41if (bind(sock, (struct sockaddr *)&name, sizeof(name)) < 0) {
42perror(“binding datagram socket”);
43exit(1);
44}
45
46/* Find assigned port value and print it out. Getsockname() gets
47the local IP address and port number associated with a socket. */
48length= sizeof(name);
49if (getsockname(sock, (struct sockaddr *)&name, &length) < 0) {
50perror(“getting socket name”);
51exit(1);
52}
53
54printf(“Socket port #%d\n”, ntohs(name.sin_port));
56while(1) {
57/* Read from the socket */
58if ((nbytes= read(sock, buf, 1024)) < 0) {
59perror(“Receiving datagram packet”);
60exit(2);
61}
62/* Print data to screen, not including Serial Adapter header */
63buf[nbytes]= ‘\0’;
64printf(“Data:
65}
66
67 }
Sample UDP Send Program
1/********************************************************
2* udpsend.c
3* Sends a series of messages to a Serial Adapter using UDP.
4*******************************************************/
6#include <sys/types.h>
7#include <sys/socket.h>
8#include <netinet/in.h>
9#include <netdb.h>
10#include <stdio.h>
12#define DATA “The sea is calm, the tide is full...”
97
