TheAlgorithms-C/client_server/udp_server.c
2020-06-28 15:25:37 +00:00

55 lines
1.4 KiB
C

// Server side implementation of UDP client-server model
#include <arpa/inet.h>
#include <netinet/in.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <unistd.h>
#define PORT 8080
#define MAXLINE 1024
// Driver code
int main()
{
int sockfd;
char buffer[MAXLINE];
char *hello = "Hello from server";
struct sockaddr_in servaddr, cliaddr;
// Creating socket file descriptor
if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
{
perror("socket creation failed");
exit(EXIT_FAILURE);
}
memset(&servaddr, 0, sizeof(servaddr));
memset(&cliaddr, 0, sizeof(cliaddr));
// Filling server information
servaddr.sin_family = AF_INET; // IPv4
servaddr.sin_addr.s_addr = INADDR_ANY;
servaddr.sin_port = htons(PORT);
// Bind the socket with the server address
if (bind(sockfd, (const struct sockaddr *)&servaddr, sizeof(servaddr)) < 0)
{
perror("bind failed");
exit(EXIT_FAILURE);
}
int len, n;
n = recvfrom(sockfd, (char *)buffer, MAXLINE, MSG_WAITALL,
(struct sockaddr *)&cliaddr, &len);
buffer[n] = '\0';
printf("Client : %s\n", buffer);
sendto(sockfd, (const char *)hello, strlen(hello), MSG_CONFIRM,
(const struct sockaddr *)&cliaddr, len);
printf("Hello message sent.\n");
return 0;
}