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

#define BUFFER_SIZE 30000
#define ATTEMPTS 100

char buf[BUFFER_SIZE];

/*
argv[1] - nazwa hosta
argv[2] - numer portu
*/
int main(int argc, char **argv)
{
    struct sockaddr_in endpoint;
    int sdsocket, addrlen, i, received;
    struct hostent *he;
    struct timeval time_b, time_e;

    if (argc<3) {
        printf("podaj nazwe hosta i numer portu jako parametry (provide hostname and port number in command line)\n");
        return 1;
    }

    he = gethostbyname(argv[1]);
    if (he == NULL) {
        printf("Nieznany host (unknown kost): %s\n",argv[1]);
        return 0;
    }

    endpoint.sin_family = AF_INET;
    endpoint.sin_port = htons(atoi(argv[2]));
    endpoint.sin_addr = *(struct in_addr*) he->h_addr;
    addrlen = sizeof(struct sockaddr_in);

    gettimeofday(&time_b, NULL);
    for (i=0; i<ATTEMPTS; i++) {

        if ((sdsocket = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
            printf("socket() %d nie powiodl sie (failed)\n", i);
            return 1;
        }

        if (connect(sdsocket,(struct sockaddr*) &endpoint, addrlen) < 0) {
            printf("connect() %d nie powiodl sie (failed)\n", i);
            return 0;
        }
        send(sdsocket, buf, BUFFER_SIZE, 0);
        received = 0;
        while (received < BUFFER_SIZE)
        {
            received += recv(sdsocket, 
                             buf+received, 
                             BUFFER_SIZE-received, 
                             0);
        }
        close(sdsocket);
    }
    gettimeofday(&time_e, NULL);

    printf("czas: %.6f s\n",
        (((double) (time_e.tv_sec - time_b.tv_sec) * 1000000) +
        ((double) (time_e.tv_usec - time_b.tv_usec)))
        / (1000000.0 * ATTEMPTS));
    return 0;
}