#include <stdio.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <stdbool.h>

int main() {
        int fds[2];
        int domain;
        domain = AF_UNIX;
 // domain = AF_INET;
        printf("Domain: %i\n", domain);
        int ret = socketpair(domain, SOCK_DGRAM, 0, fds); // try also: SOCK_STREAM
        if(ret) {
                perror("Could not get socketpair");
                return 1;
        }

        struct timeval v = {
                .tv_sec = 1,
                .tv_usec = 0
        };

        // uncomment to allow send to timeout with ETIMEDOUT after 1 second
        //ret = setsockopt(fds[0], SOL_SOCKET, SO_SNDTIMEO, &v, sizeof(v));
        if(ret) {
                perror("setsockopt");
        }

        size_t bufLen = 1024;
        char *buf = calloc(bufLen, 1);
        int ok = 0;
        while(true) {
                printf("send %i\n", ok);
                ret = send(fds[0], &buf[0], bufLen, MSG_DONTWAIT);
                // eventually: EAGAIN (on Linux and Haiku), ENOBUFS (on macOS)
                if(ret < 0) {
                        perror("send");
                        break;
                } else {
                        ok++;
                }
        }

        return 0;
}