/*      $OpenBSD: socket2.c,v 1.7 2015/11/04 21:29:20 tedu Exp $        */
/*
 * Copyright (c) 1993, 1994, 1995, 1996 by Chris Provenzano and contributors, 
 * proven@mit.edu All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Chris Provenzano,
 *      the University of California, Berkeley, and contributors.
 * 4. Neither the name of Chris Provenzano, the University, nor the names of
 *   contributors may be used to endorse or promote products derived
 *   from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY CHRIS PROVENZANO AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL CHRIS PROVENZANO, THE REGENTS OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */ 

/* ==== test_sock_1.c =========================================================
 * Copyright (c) 1993 by Chris Provenzano, proven@athena.mit.edu
 *
 * Description : Test pthread_create() and pthread_exit() calls.
 *
 *  1.00 93/08/03 proven
 *      -Started coding this file.
 */

#include <pthread.h>
#include <pthread_np.h>
#include <errno.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include "test.h"

struct sockaddr_in a_sout;

#define MESSAGE5 "This should be message #5"
#define MESSAGE6 "This should be message #6"

static void *
sock_write(void *arg)
{
        int fd = *(int *)arg;

        SET_NAME("writer");
        CHECKe(write(fd, MESSAGE5, sizeof(MESSAGE5)));
        return(NULL);
}

static pthread_mutex_t waiter_mutex = PTHREAD_MUTEX_INITIALIZER;

static void *
waiter(void *arg)
{
        int status;
        pid_t pid;

        SET_NAME("waiter");
        CHECKr(pthread_mutex_lock(&waiter_mutex));
        printf("waiting for child\n");
        CHECKe(pid = wait(&status));
        ASSERT(WIFEXITED(status));
        ASSERT(WEXITSTATUS(status) == 0);
        printf("child exited\n");
        CHECKr(pthread_mutex_unlock(&waiter_mutex));
        return (NULL);
}

static void *
sock_accept(void *arg)
{
        pthread_t thread, wthread;
        struct sockaddr a_sin;
        int a_sin_size, a_fd, fd;
        u_int16_t port;
        char buf[1024];
        pid_t pid;

        port = 3276;
        a_sout.sin_family = AF_INET;
        a_sout.sin_port = htons(port);
        a_sout.sin_addr.s_addr = INADDR_ANY;

        CHECKe(a_fd = socket(AF_INET, SOCK_STREAM, 0));

        while(1) {
                if (bind(a_fd, (struct sockaddr *)&a_sout, sizeof(a_sout))==0)
                        break;
                if (errno == EADDRINUSE) { 
                        a_sout.sin_port = htons((++port));
                        continue;
                }
                DIE(errno, "bind");
        }

        printf("listening on port %d\n", port);

        CHECKe(listen(a_fd, 2));
                
        printf("%d: This should be message #1\n", getpid());

        CHECKr(pthread_mutex_init(&waiter_mutex, NULL));
        CHECKr(pthread_mutex_lock(&waiter_mutex));
        CHECKr(pthread_create(&wthread, NULL, waiter, NULL));

        snprintf(buf, sizeof buf, "%d", port);

        CHECKe(pid = fork());
        switch(pid) {
        case 0:
                execl("socket2a", "socket2a", "fork okay", buf, (char *)NULL);
                DIE(errno, "execl");
        default:
                break;
        }
        CHECKr(pthread_mutex_unlock(&waiter_mutex));
        pthread_yield();

        a_sin_size = sizeof(a_sin);
        CHECKe(fd = accept(a_fd, &a_sin, &a_sin_size));
        CHECKe(close(fd)); 

        sleep(1);

        printf("%d: This should be message #4\n", getpid());

        a_sin_size = sizeof(a_sin);
        memset(&a_sin, 0, sizeof(a_sin));
        CHECKe(fd = accept(a_fd, &a_sin, &a_sin_size));

        /* Setup a write thread */

        CHECKr(pthread_create(&thread, NULL, sock_write, &fd));
        CHECKe(read(fd, buf, 1024));

        printf("%d: %s\n", getpid(), buf); /* message 6 */

        CHECKe(close(fd));

        if (pthread_mutex_trylock(&waiter_mutex) == EBUSY) {
                sleep(2);
                if (pthread_mutex_trylock(&waiter_mutex) == EBUSY) {
                        /* forcibly kill child */
                        CHECKe(kill(pid, SIGKILL));
                        PANIC("child %d took too long to exit", pid);
                }
        }
        CHECKr(pthread_join(wthread, NULL));

        return(NULL);
}

int
main(int argc, char *argv[])
{
        pthread_t thread;

        setvbuf(stdout, NULL, _IONBF, 0);
        setvbuf(stderr, NULL, _IONBF, 0);

        CHECKr(pthread_create(&thread, NULL, sock_accept, 
            (void *)0xdeadbeaf));

        CHECKr(pthread_join(thread, NULL));

        SUCCEED;
}