/*
    Copyright (c) 2007-2015 Contributors as noted in the AUTHORS file

    This file is part of 0MQ.

    0MQ is free software; you can redistribute it and/or modify it under
    the terms of the GNU Lesser General Public License as published by
    the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.

    0MQ is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "testutil.hpp"
#if defined (ZMQ_HAVE_WINDOWS)
#   include <winsock2.h>
#   include <ws2tcpip.h>
#   include <stdexcept>
#   define close closesocket
#else
#   include <sys/socket.h>
#   include <netinet/in.h>
#   include <arpa/inet.h>
#   include <unistd.h>
#endif

static void
zap_handler (void *handler)
{
    //  Process ZAP requests forever
    while (true) {
        char *version = s_recv (handler);
        if (!version)
            break;          //  Terminating

        char *sequence = s_recv (handler);
        char *domain = s_recv (handler);
        char *address = s_recv (handler);
        char *identity = s_recv (handler);
        char *mechanism = s_recv (handler);

        assert (streq (version, "1.0"));
        assert (streq (mechanism, "NULL"));
        
        s_sendmore (handler, version);
        s_sendmore (handler, sequence);
        if (streq (domain, "TEST")) {
            s_sendmore (handler, "200");
            s_sendmore (handler, "OK");
            s_sendmore (handler, "anonymous");
            s_send     (handler, "");
        }
        else {
            s_sendmore (handler, "400");
            s_sendmore (handler, "BAD DOMAIN");
            s_sendmore (handler, "");
            s_send     (handler, "");
        }
        free (version);
        free (sequence);
        free (domain);
        free (address);
        free (identity);
        free (mechanism);
    }
    close_zero_linger (handler);
}

int main (void)
{
    setup_test_environment();
    void *ctx = zmq_ctx_new ();
    assert (ctx);

    //  Spawn ZAP handler
    //  We create and bind ZAP socket in main thread to avoid case
    //  where child thread does not start up fast enough.
    void *handler = zmq_socket (ctx, ZMQ_REP);
    assert (handler);
    int rc = zmq_bind (handler, "inproc://zeromq.zap.01");
    assert (rc == 0);
    void *zap_thread = zmq_threadstart (&zap_handler, handler);

    //  We bounce between a binding server and a connecting client
    
    //  We first test client/server with no ZAP domain
    //  Libzmq does not call our ZAP handler, the connect must succeed
    void *server = zmq_socket (ctx, ZMQ_DEALER);
    assert (server);
    void *client = zmq_socket (ctx, ZMQ_DEALER);
    assert (client);
    rc = zmq_bind (server, "tcp://127.0.0.1:9000");
    assert (rc == 0);
    rc = zmq_connect (client, "tcp://127.0.0.1:9000");
    assert (rc == 0);
    bounce (server, client);
    close_zero_linger (client);
    close_zero_linger (server);

    //  Now define a ZAP domain for the server; this enables 
    //  authentication. We're using the wrong domain so this test
    //  must fail.
    server = zmq_socket (ctx, ZMQ_DEALER);
    assert (server);
    client = zmq_socket (ctx, ZMQ_DEALER);
    assert (client);
    rc = zmq_setsockopt (server, ZMQ_ZAP_DOMAIN, "WRONG", 5);
    assert (rc == 0);
    rc = zmq_bind (server, "tcp://127.0.0.1:9001");
    assert (rc == 0);
    rc = zmq_connect (client, "tcp://127.0.0.1:9001");
    assert (rc == 0);
    expect_bounce_fail (server, client);
    close_zero_linger (client);
    close_zero_linger (server);

    //  Now use the right domain, the test must pass
    server = zmq_socket (ctx, ZMQ_DEALER);
    assert (server);
    client = zmq_socket (ctx, ZMQ_DEALER);
    assert (client);
    rc = zmq_setsockopt (server, ZMQ_ZAP_DOMAIN, "TEST", 4);
    assert (rc == 0);
    rc = zmq_bind (server, "tcp://127.0.0.1:9002");
    assert (rc == 0);
    rc = zmq_connect (client, "tcp://127.0.0.1:9002");
    assert (rc == 0);
    bounce (server, client);
    close_zero_linger (client);
    close_zero_linger (server);

    // Unauthenticated messages from a vanilla socket shouldn't be received
    server = zmq_socket (ctx, ZMQ_DEALER);
    assert (server);
    rc = zmq_setsockopt (server, ZMQ_ZAP_DOMAIN, "WRONG", 5);
    assert (rc == 0);
    rc = zmq_bind (server, "tcp://127.0.0.1:9003");
    assert (rc == 0);

    struct sockaddr_in ip4addr;
    int s;

    ip4addr.sin_family = AF_INET;
    ip4addr.sin_port = htons(9003);
    inet_pton(AF_INET, "127.0.0.1", &ip4addr.sin_addr);

    s = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP);
    rc = connect (s, (struct sockaddr*) &ip4addr, sizeof ip4addr);
    assert (rc > -1);
    // send anonymous ZMTP/1.0 greeting
    send (s, "\x01\x00", 2, 0);
    // send sneaky message that shouldn't be received
    send (s, "\x08\x00sneaky\0", 9, 0);
    int timeout = 150;
    zmq_setsockopt (server, ZMQ_RCVTIMEO, &timeout, sizeof (timeout));
    char *buf = s_recv (server);
    if (buf != NULL) {
        printf ("Received unauthenticated message: %s\n", buf);
        assert (buf == NULL);
    }
    close (s);
    close_zero_linger (server);

    //  Shutdown
    rc = zmq_ctx_term (ctx);
    assert (rc == 0);
    //  Wait until ZAP handler terminates
    zmq_threadclose (zap_thread);

    return 0;
}