Connect blocking behaviour

[adamdebek]

I think connect() should only establish connection and return, but in our case it blocks until connection is accepted.

Code to reproduction (blocking):

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

int main(void)
{
        int fd[2];
        struct sockaddr_in addr;
        addr.sin_family = AF_INET;
        addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
        addr.sin_port = 10000;
        int reuse = 1;

        if ( (fd[0] = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
                perror("socket");
                exit(-1);
        }

        if (setsockopt(fd[0], SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse)) == -1) {
                perror("setsockopt");
                exit(-1);
        }

        if (bind(fd[0], (struct sockaddr*)&addr, sizeof(addr)) == -1) {
                perror("bind");
                exit(-1);
        }

        if (listen(fd[0], 1) == -1) {
                perror("listen");
                exit(-1);
        }

        if ( (fd[1] = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
                perror("socket2");
                exit(-1);
        }

        if (connect(fd[1], (struct sockaddr*)&addr, sizeof(addr)) == -1) {
                perror("connect");
                exit(-1);
        }

        if ( (fd[0] = accept(fd[0], NULL, NULL)) == -1) {
                perror("accept");
                exit(-1);
        }

        char buf[10];
        write(fd[0], "wiadomosc", 10);
        read(fd[1], buf, 10);
        printf("%s\n", buf);
}