test_stream.cpp 10.7 KB
Newer Older
1
/*
2
    Copyright (c) 2007-2016 Contributors as noted in the AUTHORS file
3

4
    This file is part of libzmq, the ZeroMQ core engine in C++.
5

6 7 8
    libzmq is free software; you can redistribute it and/or modify it under
    the terms of the GNU Lesser General Public License (LGPL) as published
    by the Free Software Foundation; either version 3 of the License, or
9 10
    (at your option) any later version.

11 12 13 14 15 16 17 18 19 20 21 22 23 24
    As a special exception, the Contributors give you permission to link
    this library with independent modules to produce an executable,
    regardless of the license terms of these independent modules, and to
    copy and distribute the resulting executable under terms of your choice,
    provided that you also meet, for each linked independent module, the
    terms and conditions of the license of that module. An independent
    module is a module which is not derived from or based on this library.
    If you modify this library, you must extend this exception to your
    version of the library.

    libzmq 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.
25 26 27 28 29

    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/>.
*/

30
#include "testutil.hpp"
31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47

//  ZMTP protocol greeting structure

typedef unsigned char byte;
typedef struct {
    byte signature [10];    //  0xFF 8*0x00 0x7F
    byte version [2];       //  0x03 0x00 for ZMTP/3.0
    byte mechanism [20];    //  "NULL"
    byte as_server;
    byte filler [31];
} zmtp_greeting_t;

#define ZMTP_DEALER  5      //  Socket type constants

//  This is a greeting matching what 0MQ will send us; note the
//  8-byte size is set to 1 for backwards compatibility

48 49 50 51 52 53 54
static zmtp_greeting_t
    greeting = { { 0xFF, 0, 0, 0, 0, 0, 0, 0, 1, 0x7F },
                 { 3, 0 },
                 { 'N', 'U', 'L', 'L'},
                 0,
                 { 0 }
    };
55 56

static void
57
test_stream_to_dealer (void)
58 59 60 61 62 63 64 65 66 67 68 69 70 71
{
    int rc;

    //  Set up our context and sockets
    void *ctx = zmq_ctx_new ();
    assert (ctx);

    //  We'll be using this socket in raw mode
    void *stream = zmq_socket (ctx, ZMQ_STREAM);
    assert (stream);

    int zero = 0;
    rc = zmq_setsockopt (stream, ZMQ_LINGER, &zero, sizeof (zero));
    assert (rc == 0);
72 73 74
    int enabled = 1;
    rc = zmq_setsockopt (stream, ZMQ_STREAM_NOTIFY, &enabled, sizeof (enabled));
    assert (rc == 0);
75
    rc = zmq_bind (stream, "tcp://127.0.0.1:5556");
76 77 78 79 80 81 82 83 84 85 86 87 88
    assert (rc == 0);

    //  We'll be using this socket as the other peer
    void *dealer = zmq_socket (ctx, ZMQ_DEALER);
    assert (dealer);
    rc = zmq_setsockopt (dealer, ZMQ_LINGER, &zero, sizeof (zero));
    assert (rc == 0);
    rc = zmq_connect (dealer, "tcp://localhost:5556");

    //  Send a message on the dealer socket
    rc = zmq_send (dealer, "Hello", 5, 0);
    assert (rc == 5);

89
    //  Connecting sends a zero message
90 91 92 93 94 95 96 97
    //  First frame is identity
    zmq_msg_t identity;
    rc = zmq_msg_init (&identity);
    assert (rc == 0);
    rc = zmq_msg_recv (&identity, stream, 0);
    assert (rc > 0);
    assert (zmq_msg_more (&identity));

98 99
    //  Verify the existence of Peer-Address metadata
    char const *peer_address = zmq_msg_gets (&identity, "Peer-Address");
100 101
    assert (peer_address != 0);
    assert (streq (peer_address, "127.0.0.1"));
102

103
    //  Second frame is zero
104 105
    byte buffer [255];
    rc = zmq_recv (stream, buffer, 255, 0);
106
    assert (rc == 0);
107

108
    //  Verify the existence of Peer-Address metadata
109 110 111
    peer_address = zmq_msg_gets (&identity, "Peer-Address");
    assert (peer_address != 0);
    assert (streq (peer_address, "127.0.0.1"));
112

113 114 115 116 117 118
    //  Real data follows
    //  First frame is identity
    rc = zmq_msg_recv (&identity, stream, 0);
    assert (rc > 0);
    assert (zmq_msg_more (&identity));

119
    //  Verify the existence of Peer-Address metadata
120 121 122
    peer_address = zmq_msg_gets (&identity, "Peer-Address");
    assert (peer_address != 0);
    assert (streq (peer_address, "127.0.0.1"));
123

124
    //  Second frame is greeting signature
125
    rc = zmq_recv (stream, buffer, 255, 0);
126 127 128 129 130 131 132 133 134 135
    assert (rc == 10);
    assert (memcmp (buffer, greeting.signature, 10) == 0);

    //  Send our own protocol greeting
    rc = zmq_msg_send (&identity, stream, ZMQ_SNDMORE);
    assert (rc > 0);
    rc = zmq_send (stream, &greeting, sizeof (greeting), 0);
    assert (rc == sizeof (greeting));

    //  Now we expect the data from the DEALER socket
136
    //  We want the rest of greeting along with the Ready command
Pieter Hintjens's avatar
Pieter Hintjens committed
137 138
    int bytes_read = 0;
    while (bytes_read < 97) {
139 140 141 142 143
        //  First frame is the identity of the connection (each time)
        rc = zmq_msg_recv (&identity, stream, 0);
        assert (rc > 0);
        assert (zmq_msg_more (&identity));
        //  Second frame contains the next chunk of data
Pieter Hintjens's avatar
Pieter Hintjens committed
144 145 146 147
        rc = zmq_recv (stream, buffer + bytes_read, 255 - bytes_read, 0);
        assert (rc >= 0);
        bytes_read += rc;
    }
148 149 150 151 152 153

    //  First two bytes are major and minor version numbers.
    assert (buffer [0] == 3);       //  ZMTP/3.0
    assert (buffer [1] == 0);

    //  Mechanism is "NULL"
154 155
    assert (memcmp (buffer + 2, "NULL\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 20) == 0);
    assert (memcmp (buffer + 54, "\4\51\5READY", 8) == 0);
156 157
    assert (memcmp (buffer + 62, "\13Socket-Type\0\0\0\6DEALER", 22) == 0);
    assert (memcmp (buffer + 84, "\10Identity\0\0\0\0", 13) == 0);
158 159

    //  Announce we are ready
160
    memcpy (buffer, "\4\51\5READY", 8);
161
    memcpy (buffer + 8, "\13Socket-Type\0\0\0\6ROUTER", 22);
162
    memcpy (buffer + 30, "\10Identity\0\0\0\0", 13);
163 164 165 166

    //  Send Ready command
    rc = zmq_msg_send (&identity, stream, ZMQ_SNDMORE);
    assert (rc > 0);
167 168
    rc = zmq_send (stream, buffer, 43, 0);
    assert (rc == 43);
169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196

    //  Now we expect the data from the DEALER socket
    //  First frame is, again, the identity of the connection
    rc = zmq_msg_recv (&identity, stream, 0);
    assert (rc > 0);
    assert (zmq_msg_more (&identity));

    //  Third frame contains Hello message from DEALER
    rc = zmq_recv (stream, buffer, sizeof buffer, 0);
    assert (rc == 7);

    //  Then we have a 5-byte message "Hello"
    assert (buffer [0] == 0);       //  Flags = 0
    assert (buffer [1] == 5);       //  Size = 5
    assert (memcmp (buffer + 2, "Hello", 5) == 0);

    //  Send "World" back to DEALER
    rc = zmq_msg_send (&identity, stream, ZMQ_SNDMORE);
    assert (rc > 0);
    byte world [] = { 0, 5, 'W', 'o', 'r', 'l', 'd' };
    rc = zmq_send (stream, world, sizeof (world), 0);
    assert (rc == sizeof (world));

    //  Expect response on DEALER socket
    rc = zmq_recv (dealer, buffer, 255, 0);
    assert (rc == 5);
    assert (memcmp (buffer, "World", 5) == 0);

197
    //  Test large messages over STREAM socket
198
#   define size  64000
199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219
    uint8_t msgout [size];
    memset (msgout, 0xAB, size);
    zmq_send (dealer, msgout, size, 0);

    uint8_t msgin [9 + size];
    memset (msgin, 0, 9 + size);
    bytes_read = 0;
    while (bytes_read < 9 + size) {
        //  Get identity frame
        rc = zmq_recv (stream, buffer, 256, 0);
        assert (rc > 0);
        //  Get next chunk
        rc = zmq_recv (stream, msgin + bytes_read, 9 + size - bytes_read, 0);
        assert (rc > 0);
        bytes_read += rc;
    }
    int byte_nbr;
    for (byte_nbr = 0; byte_nbr < size; byte_nbr++) {
        if (msgin [9 + byte_nbr] != 0xAB)
            assert (false);
    }
220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237
    rc = zmq_close (dealer);
    assert (rc == 0);

    rc = zmq_close (stream);
    assert (rc == 0);

    rc = zmq_ctx_term (ctx);
    assert (rc == 0);
}


static void
test_stream_to_stream (void)
{
    int rc;
    //  Set-up our context and sockets
    void *ctx = zmq_ctx_new ();
    assert (ctx);
238

239 240
    void *server = zmq_socket (ctx, ZMQ_STREAM);
    assert (server);
241 242 243
    int enabled = 1;
    rc = zmq_setsockopt (server, ZMQ_STREAM_NOTIFY, &enabled, sizeof (enabled));
    assert (rc == 0);
244
    rc = zmq_bind (server, "tcp://127.0.0.1:9070");
245 246 247 248
    assert (rc == 0);

    void *client = zmq_socket (ctx, ZMQ_STREAM);
    assert (client);
249 250
    rc = zmq_setsockopt (client, ZMQ_STREAM_NOTIFY, &enabled, sizeof (enabled));
    assert (rc == 0);
251
    rc = zmq_connect (client, "tcp://localhost:9070");
252 253 254
    assert (rc == 0);
    uint8_t id [256];
    size_t id_size = 256;
255
    uint8_t buffer [256];
256

257 258 259 260 261 262 263 264 265 266 267 268
    //  Connecting sends a zero message
    //  Server: First frame is identity, second frame is zero
    id_size = zmq_recv (server, id, 256, 0);
    assert (id_size > 0);
    rc = zmq_recv (server, buffer, 256, 0);
    assert (rc == 0);
    //  Client: First frame is identity, second frame is zero
    id_size = zmq_recv (client, id, 256, 0);
    assert (id_size > 0);
    rc = zmq_recv (client, buffer, 256, 0);
    assert (rc == 0);

269
    //  Sent HTTP request on client socket
270 271 272
    //  Get server identity
    rc = zmq_getsockopt (client, ZMQ_IDENTITY, id, &id_size);
    assert (rc == 0);
273 274 275 276 277 278
    //  First frame is server identity
    rc = zmq_send (client, id, id_size, ZMQ_SNDMORE);
    assert (rc == (int) id_size);
    //  Second frame is HTTP GET request
    rc = zmq_send (client, "GET /\n\n", 7, 0);
    assert (rc == 7);
279

280 281 282 283
    //  Get HTTP request; ID frame and then request
    id_size = zmq_recv (server, id, 256, 0);
    assert (id_size > 0);
    rc = zmq_recv (server, buffer, 256, 0);
284
    assert (rc != -1);
285
    assert (memcmp (buffer, "GET /\n\n", 7) == 0);
286

287 288
    //  Send reply back to client
    char http_response [] =
289 290 291
        "HTTP/1.0 200 OK\r\n"
        "Content-Type: text/plain\r\n"
        "\r\n"
292
        "Hello, World!";
293 294 295 296 297 298 299 300 301 302
    rc = zmq_send (server, id, id_size, ZMQ_SNDMORE);
    assert (rc != -1);
    rc = zmq_send (server, http_response, sizeof (http_response), ZMQ_SNDMORE);
    assert (rc != -1);

    //  Send zero to close connection to client
    rc = zmq_send (server, id, id_size, ZMQ_SNDMORE);
    assert (rc != -1);
    rc = zmq_send (server, NULL, 0, ZMQ_SNDMORE);
    assert (rc != -1);
303 304 305 306 307 308 309

    //  Get reply at client and check that it's complete
    id_size = zmq_recv (client, id, 256, 0);
    assert (id_size > 0);
    rc = zmq_recv (client, buffer, 256, 0);
    assert (rc == sizeof (http_response));
    assert (memcmp (buffer, http_response, sizeof (http_response)) == 0);
310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325

    // //  Get disconnection notification
    // FIXME: why does this block? Bug in STREAM disconnect notification?
    // id_size = zmq_recv (client, id, 256, 0);
    // assert (id_size > 0);
    // rc = zmq_recv (client, buffer, 256, 0);
    // assert (rc == 0);

    rc = zmq_close (server);
    assert (rc == 0);

    rc = zmq_close (client);
    assert (rc == 0);

    rc = zmq_ctx_term (ctx);
    assert (rc == 0);
326 327 328 329
}

int main (void)
{
330
    setup_test_environment();
331 332
    test_stream_to_dealer ();
    test_stream_to_stream ();
333
}