rendered paste body/* fpont 12/99 */
/* pont.net */
/* udpServer.c */
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <stdio.h>
#include <unistd.h> /* close() */
#include <string.h> /* memset() */
#define LOCAL_SERVER_PORT 1500
#define MAX_MSG 100
int main(int argc, char *argv[]) {
int sd, rc, n, cliLen;
struct sockaddr_in cliAddr, servAddr;
char msg[MAX_MSG];
char sendMsg[MAX_MSG];
/* socket creation */
sd=socket(AF_INET, SOCK_DGRAM, 0);
if(sd<0) {
printf("%s: cannot open socket \n",argv[0]);
exit(1);
}
/* bind local server port */
servAddr.sin_family = AF_INET;
servAddr.sin_addr.s_addr = htonl(INADDR_ANY);
servAddr.sin_port = htons(LOCAL_SERVER_PORT);
rc = bind (sd, (struct sockaddr *) &servAddr,sizeof(servAddr));
if(rc<0) {
printf("%s: cannot bind port number %d \n",
argv[0], LOCAL_SERVER_PORT);
exit(1);
}
printf("%s: waiting for data on port UDP %u\n",
argv[0],LOCAL_SERVER_PORT);
/* server infinite loop */
while(1) {
/* receive message */
cliLen = sizeof(cliAddr);
n = recvfrom(sd, msg, MAX_MSG, 0,(struct sockaddr *) &cliAddr, &cliLen);
if(n<0) {printf("%s: cannot receive data \n",argv[0]); exit(1); }
printf("%s",msg);
/*send message*/
scanf("%s",sendMsg);
strcat(sendMsg,"\n");
rc = sendto(sd, sendMsg, strlen(sendMsg), 0,(struct sockaddr *) &cliAddr, sizeof(cliAddr));
if(rc<0) { printf("cannot send data: %s\n",sendMsg); close(sd); exit(1); }
}/* end of server infinite loop */
return 0;
}