mirror of https://github.com/TheAlgorithms/C
55 lines
1.4 KiB
C
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;
|
|
}
|