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client.c
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client.c
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#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <strings.h>
#include <string.h>
#include <unistd.h>
#define MAX_BUFFER_SIZE (128)
static const char SERVER_IP[] = "127.0.0.1";
static const uint16_t SERVER_PORT = 8080;
void echo_chat(int client_socket_fd)
{
char buf[MAX_BUFFER_SIZE];
ssize_t n;
while (1) {
printf("Input message: ");
fgets(buf, MAX_BUFFER_SIZE, stdin);
buf[strlen(buf) - 1] = 0;
n = write(client_socket_fd, buf, strlen(buf));
n = read(client_socket_fd, buf, n);
if (n < 1) {
perror("Something goes wrong while read from peer socket");
return;
}
printf("Message from server: %s\n", buf);
}
}
int main()
{
/* File descriptor for socket. */
int client_socket;
struct sockaddr_in server_addr;
/* Socket creation. */
client_socket = socket(AF_INET, SOCK_STREAM, 0);
if (client_socket == -1) {
perror("Error creating client socket");
return EXIT_FAILURE;
}
printf("Successfully create client socket.\n");
bzero(&server_addr, sizeof(struct sockaddr_in));
server_addr.sin_family = AF_INET;
server_addr.sin_port = SERVER_PORT;
server_addr.sin_addr.s_addr = inet_addr(SERVER_IP);
if (connect(client_socket, (struct sockaddr*)&server_addr, sizeof(server_addr)) == -1) {
perror("Error while connecting to server");
return EXIT_FAILURE;
}
printf("Start echo chat.\n");
echo_chat(client_socket);
close(client_socket);
printf("Close client socket.\n");
return EXIT_SUCCESS;
}