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

void run_client(int port, char *msg) {
	int sockfd = socket(AF_INET, SOCK_STREAM, 0);
	if (sockfd < 0) {
		fprintf(stderr, "socket: ");
		exit(EXIT_FAILURE);
	}

	struct sockaddr_in server_addr;
	memset(&server_addr, 0, sizeof(server_addr));
	server_addr.sin_family = AF_INET;
	server_addr.sin_addr.s_addr = INADDR_ANY;
	server_addr.sin_port = htons(port);
    if (connect(sockfd, (const struct sockaddr *)&server_addr, sizeof(server_addr))) {
    	fprintf(stderr, "connect: ");
    	exit(EXIT_FAILURE);
    }

    int rv = sendto(sockfd, msg, strlen(msg), 0, (const struct sockaddr *)&server_addr, sizeof(server_addr));
    if (rv < 0) {
    	fprintf(stderr, "sendto: ");
    	exit(EXIT_FAILURE);
    }

    char buffer[100];
    memset(&buffer, 0, sizeof(buffer));
    socklen_t server_addr_len = sizeof(server_addr);
    rv = recvfrom(sockfd, buffer, sizeof(buffer), 0, (struct sockaddr *)&server_addr, &server_addr_len);
    if (rv < 0) {
    	fprintf(stderr, "recvfrom: ");
    	exit(EXIT_FAILURE);
    }

    printf("Server reply: %s\n", buffer);

	close(sockfd);
}

int main(int arc, char *argv[]) {
    
    run_client(2137, argv[1]);

	return 0;
}