PerforkingClient

//Nama : Raviqa Sandra Putri
//Nim : 1856401009

#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>

void child_funch(int childnum);

int main(int argc, char *argv[])
{
int nchildren = 1;
int pid;
int x;

    if (argc > 1) {
        nchildren = atoi(argv[1]);
    }

    for (x=0; x < nchildren; x++) {
    if ((pid = fork()) == 0) {
        child_funch(x + 1);
        exit(0);
        }
    }
    wait(NULL);
    return 0;
}

void child_func(int childnum)
{
    int sock;
    struct sockaddr_in sAddr;
    char buffer[25];
    int x;

    sAddr.sin_family = AF_INET;
    sAddr.sin_addr.s_addr = INADDR_ANY;
    sAddr.sin_port = 0;


    sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    bind(sock, (const struct sockaddr *) &sAddr, sizeof(sAddr));

    sAddr.sin_addr.s_addr = inet_addr("127.0.0.1");
    sAddr.sin_port = htons(1972);

    if (connect(sock, (const struct sockaddr *) &sAddr, sizeof(sAddr)) != 0){
        perror("client");
        return;
    }
    snprintf(buffer, 128, "data from client #%i.", childnum);
    sleep(1);
    printf("child #%i sent %i chars\n", childnum, send(sock, buffer, strlen(buffer), 0));
    sleep(1);
    printf("child #%i received %i chars\n", childnum, recv(sock, buffer, 25, 0));
    sleep(1);

close(sock);
}