S01_BSD_01_CLIENT

/*
Napisz programy do przesyłania prostych komunikatów między dwoma komputerami zuż yciem protokoł u TCP/IP.
*/

#include <stdio.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <string.h>

#define SERVER_PORT 1919
#define SERVER_IP "127.0.0.1"
#define WRITE_BUFFER_SIZE 128

void error_handler(const char *msg)
{
    perror(msg);
    exit(EXIT_FAILURE);
}

int main(void)
{
    struct sockaddr_in server_addr;
    int client_socket;
    char buffer[WRITE_BUFFER_SIZE];

    if((client_socket = socket(AF_INET, SOCK_STREAM, 0)) == -1)
        error_handler("socket");

    if(!inet_aton(SERVER_IP, &server_addr.sin_addr))
        error_handler("inet_aton");

    server_addr.sin_family = AF_INET;
    server_addr.sin_port = htons(SERVER_PORT);
    memset(server_addr.sin_zero, '\0', 8);

    if(connect(client_socket, (struct sockaddr *)&server_addr, sizeof(server_addr)) == -1)
        error_handler("connect");

    printf("Polaczono z serwerem!\nPodaj wiadomosc do przeslania\n> ");
    fgets(buffer, WRITE_BUFFER_SIZE, stdin);

    if(write(client_socket, buffer, WRITE_BUFFER_SIZE) == -1)
        error_handler("write");

    printf("Wiadomosc zostala wyslana!\n");

    if(close(client_socket) == -1)
        error_handler("close");

    return EXIT_SUCCESS;
}