summaryrefslogtreecommitdiff
path: root/librabbitmq/amqp_socket.c
blob: debed2a6c0f668c6cfddd5219cd2182768d66e3e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
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
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
/*
 * ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0
 *
 * The contents of this file are subject to the Mozilla Public License
 * Version 1.1 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License
 * at http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
 * the License for the specific language governing rights and
 * limitations under the License.
 *
 * The Original Code is librabbitmq.
 *
 * The Initial Developer of the Original Code is VMware, Inc.
 * Portions created by VMware are Copyright (c) 2007-2011 VMware, Inc.
 *
 * Portions created by Tony Garnock-Jones are Copyright (c) 2009-2010
 * VMware, Inc. and Tony Garnock-Jones.
 *
 * All rights reserved.
 *
 * Alternatively, the contents of this file may be used under the terms
 * of the GNU General Public License Version 2 or later (the "GPL"), in
 * which case the provisions of the GPL are applicable instead of those
 * above. If you wish to allow use of your version of this file only
 * under the terms of the GPL, and not to allow others to use your
 * version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the
 * notice and other provisions required by the GPL. If you do not
 * delete the provisions above, a recipient may use your version of
 * this file under the terms of any one of the MPL or the GPL.
 *
 * ***** END LICENSE BLOCK *****
 */

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <stdarg.h>
#include <assert.h>

#include "amqp.h"
#include "amqp_framing.h"
#include "amqp_private.h"


int amqp_open_socket(char const *hostname,
		     int portnumber)
{
  int sockfd, res;
  struct sockaddr_in addr;
  struct hostent *he;
  int one = 1; /* used as a buffer by setsockopt below */

  res = amqp_socket_init();
  if (res)
    return res;

  he = gethostbyname(hostname);
  if (he == NULL)
    return -ERROR_GETHOSTBYNAME_FAILED;

  addr.sin_family = AF_INET;
  addr.sin_port = htons(portnumber);
  addr.sin_addr.s_addr = * (uint32_t *) he->h_addr_list[0];

  sockfd = socket(PF_INET, SOCK_STREAM, 0);
  if (sockfd == -1)
    return -amqp_socket_error();

  if (amqp_socket_setsockopt(sockfd, IPPROTO_TCP, TCP_NODELAY, &one,
			     sizeof(one)) < 0
      || connect(sockfd, (struct sockaddr *) &addr, sizeof(addr)) < 0)
  {
    res = -amqp_socket_error();
    amqp_socket_close(sockfd);
    return res;
  }

  return sockfd;
}

int amqp_send_header(amqp_connection_state_t state) {
  static const uint8_t header[8] = { 'A', 'M', 'Q', 'P', 0,
				     AMQP_PROTOCOL_VERSION_MAJOR,
				     AMQP_PROTOCOL_VERSION_MINOR,
				     AMQP_PROTOCOL_VERSION_REVISION };
  return send(state->sockfd, (void *)header, 8, 0);
}

static amqp_bytes_t sasl_method_name(amqp_sasl_method_enum method) {
  amqp_bytes_t res;

  switch (method) {
  case AMQP_SASL_METHOD_PLAIN:
    res.bytes = "PLAIN";
    res.len = 5;
    break;

  default:
    amqp_abort("Invalid SASL method: %d", (int) method);
  }

  return res;
}

static amqp_bytes_t sasl_response(amqp_pool_t *pool,
				  amqp_sasl_method_enum method,
				  va_list args)
{
  amqp_bytes_t response;

  switch (method) {
    case AMQP_SASL_METHOD_PLAIN: {
      char *username = va_arg(args, char *);
      size_t username_len = strlen(username);
      char *password = va_arg(args, char *);
      size_t password_len = strlen(password);
      char *response_buf;

      amqp_pool_alloc_bytes(pool, strlen(username) + strlen(password) + 2, &response);
      if (response.bytes == NULL)
	/* We never request a zero-length block, because of the +2
	   above, so a NULL here really is ENOMEM. */
	return response;

      response_buf = response.bytes;
      response_buf[0] = 0;
      memcpy(response_buf + 1, username, username_len);
      response_buf[username_len + 1] = 0;
      memcpy(response_buf + username_len + 2, password, password_len);
      break;
    }
    default:
      amqp_abort("Invalid SASL method: %d", (int) method);
  }

  return response;
}

amqp_boolean_t amqp_frames_enqueued(amqp_connection_state_t state) {
  return (state->first_queued_frame != NULL);
}

/*
 * Check to see if we have data in our buffer. If this returns 1, we
 * will avoid an immediate blocking read in amqp_simple_wait_frame.
 */
amqp_boolean_t amqp_data_in_buffer(amqp_connection_state_t state) {
  return (state->sock_inbound_offset < state->sock_inbound_limit);
}

static int wait_frame_inner(amqp_connection_state_t state,
			    amqp_frame_t *decoded_frame)
{
  while (1) {
    int res;

    while (amqp_data_in_buffer(state)) {
      amqp_bytes_t buffer;
      buffer.len = state->sock_inbound_limit - state->sock_inbound_offset;
      buffer.bytes = ((char *) state->sock_inbound_buffer.bytes) + state->sock_inbound_offset;

      res = amqp_handle_input(state, buffer, decoded_frame);
      if (res < 0)
	return res;

      state->sock_inbound_offset += res;

      if (decoded_frame->frame_type != 0)
	/* Complete frame was read. Return it. */
	return 0;

      /* Incomplete or ignored frame. Keep processing input. */
      assert(res != 0);
    }

    res = recv(state->sockfd, state->sock_inbound_buffer.bytes,
		  state->sock_inbound_buffer.len, 0);
    if (res <= 0) {
      if (res == 0)
	return -ERROR_CONNECTION_CLOSED;
      else
	return -amqp_socket_error();
    }

    state->sock_inbound_limit = res;
    state->sock_inbound_offset = 0;
  }
}

int amqp_simple_wait_frame(amqp_connection_state_t state,
			   amqp_frame_t *decoded_frame)
{
  if (state->first_queued_frame != NULL) {
    amqp_frame_t *f = (amqp_frame_t *) state->first_queued_frame->data;
    state->first_queued_frame = state->first_queued_frame->next;
    if (state->first_queued_frame == NULL) {
      state->last_queued_frame = NULL;
    }
    *decoded_frame = *f;
    return 0;
  } else {
    return wait_frame_inner(state, decoded_frame);
  }
}

int amqp_simple_wait_method(amqp_connection_state_t state,
			    amqp_channel_t expected_channel,
			    amqp_method_number_t expected_method,
			    amqp_method_t *output)
{
  amqp_frame_t frame;
  int res = amqp_simple_wait_frame(state, &frame);
  if (res < 0)
    return res;

  if (frame.channel != expected_channel)
    amqp_abort("Expected 0x%08X method frame on channel %d, got frame on channel %d",
	       expected_method,
	       expected_channel,
	       frame.channel);
  if (frame.frame_type != AMQP_FRAME_METHOD)
    amqp_abort("Expected 0x%08X method frame on channel %d, got frame type %d",
	       expected_method,
	       expected_channel,
	       frame.frame_type);
  if (frame.payload.method.id != expected_method)
    amqp_abort("Expected method ID 0x%08X on channel %d, got ID 0x%08X",
	       expected_method,
	       expected_channel,
	       frame.payload.method.id);
  *output = frame.payload.method;
  return 0;
}

int amqp_send_method(amqp_connection_state_t state,
		     amqp_channel_t channel,
		     amqp_method_number_t id,
		     void *decoded)
{
  amqp_frame_t frame;

  frame.frame_type = AMQP_FRAME_METHOD;
  frame.channel = channel;
  frame.payload.method.id = id;
  frame.payload.method.decoded = decoded;
  return amqp_send_frame(state, &frame);
}

static int amqp_id_in_reply_list( amqp_method_number_t expected, amqp_method_number_t *list )
{
  while ( *list != 0 ) {
    if ( *list == expected ) return 1;
    list++;
  }
  return 0;
}

amqp_rpc_reply_t amqp_simple_rpc(amqp_connection_state_t state,
				 amqp_channel_t channel,
				 amqp_method_number_t request_id,
				 amqp_method_number_t *expected_reply_ids,
				 void *decoded_request_method)
{
  int status;
  amqp_rpc_reply_t result;

  memset(&result, 0, sizeof(result));

  status = amqp_send_method(state, channel, request_id, decoded_request_method);
  if (status < 0) {
    result.reply_type = AMQP_RESPONSE_LIBRARY_EXCEPTION;
    result.library_error = -status;
    return result;
  }

  {
    amqp_frame_t frame;

  retry:
    status = wait_frame_inner(state, &frame);
    if (status < 0) {
      result.reply_type = AMQP_RESPONSE_LIBRARY_EXCEPTION;
      result.library_error = -status;
      return result;
    }

    /*
     * We store the frame for later processing unless it's something
     * that directly affects us here, namely a method frame that is
     * either
     *  - on the channel we want, and of the expected type, or
     *  - on the channel we want, and a channel.close frame, or
     *  - on channel zero, and a connection.close frame.
     */
    if (!( (frame.frame_type == AMQP_FRAME_METHOD) &&
	   (   ((frame.channel == channel) &&
		((amqp_id_in_reply_list(frame.payload.method.id, expected_reply_ids)) ||
		 (frame.payload.method.id == AMQP_CHANNEL_CLOSE_METHOD)))
	    ||
	       ((frame.channel == 0) &&
		(frame.payload.method.id == AMQP_CONNECTION_CLOSE_METHOD))   ) ))
    {
      amqp_frame_t *frame_copy = amqp_pool_alloc(&state->decoding_pool, sizeof(amqp_frame_t));
      amqp_link_t *link = amqp_pool_alloc(&state->decoding_pool, sizeof(amqp_link_t));

      if (frame_copy == NULL || link == NULL) {
	result.reply_type = AMQP_RESPONSE_LIBRARY_EXCEPTION;
	result.library_error = ERROR_NO_MEMORY;
	return result;
      }

      *frame_copy = frame;

      link->next = NULL;
      link->data = frame_copy;

      if (state->last_queued_frame == NULL) {
	state->first_queued_frame = link;
      } else {
	state->last_queued_frame->next = link;
      }
      state->last_queued_frame = link;

      goto retry;
    }

    result.reply_type = (amqp_id_in_reply_list(frame.payload.method.id, expected_reply_ids))
      ? AMQP_RESPONSE_NORMAL
      : AMQP_RESPONSE_SERVER_EXCEPTION;

    result.reply = frame.payload.method;
    return result;
  }
}

void *amqp_simple_rpc_decoded(amqp_connection_state_t state,
			      amqp_channel_t channel,
			      amqp_method_number_t request_id,
			      amqp_method_number_t reply_id,
			      void *decoded_request_method)
{
  amqp_method_number_t replies[2];

  replies[0] = reply_id;
  replies[1] = 0;

  state->most_recent_api_result = amqp_simple_rpc(state, channel,
						  request_id, replies,
						  decoded_request_method);
  if (state->most_recent_api_result.reply_type == AMQP_RESPONSE_NORMAL)
    return state->most_recent_api_result.reply.decoded;
  else
    return NULL;
}

amqp_rpc_reply_t amqp_get_rpc_reply(amqp_connection_state_t state)
{
  return state->most_recent_api_result;
}


static int amqp_login_inner(amqp_connection_state_t state,
			    int channel_max,
			    int frame_max,
			    int heartbeat,
			    amqp_sasl_method_enum sasl_method,
			    va_list vl)
{
  int res;
  amqp_method_t method;
  uint32_t server_frame_max;
  uint16_t server_channel_max;
  uint16_t server_heartbeat;

  amqp_send_header(state);

  res = amqp_simple_wait_method(state, 0, AMQP_CONNECTION_START_METHOD,
				&method);
  if (res < 0)
    return res;

  {
    amqp_connection_start_t *s = (amqp_connection_start_t *) method.decoded;
    if ((s->version_major != AMQP_PROTOCOL_VERSION_MAJOR) ||
	(s->version_minor != AMQP_PROTOCOL_VERSION_MINOR)) {
      return -ERROR_INCOMPATIBLE_AMQP_VERSION;
    }

    /* TODO: check that our chosen SASL mechanism is in the list of
       acceptable mechanisms. Or even let the application choose from
       the list! */
  }

  {
    amqp_connection_start_ok_t s;
    amqp_bytes_t response_bytes = sasl_response(&state->decoding_pool,
						sasl_method, vl);

    if (response_bytes.bytes == NULL)
      return -ERROR_NO_MEMORY;

    s.client_properties.num_entries = 0;
    s.client_properties.entries = NULL;
    s.mechanism = sasl_method_name(sasl_method);
    s.response = response_bytes;
    s.locale.bytes = "en_US";
    s.locale.len = 5;

    res = amqp_send_method(state, 0, AMQP_CONNECTION_START_OK_METHOD, &s);
    if (res < 0)
      return res;
  }

  amqp_release_buffers(state);

  res = amqp_simple_wait_method(state, 0, AMQP_CONNECTION_TUNE_METHOD,
				&method);
  if (res < 0)
    return res;

  {
    amqp_connection_tune_t *s = (amqp_connection_tune_t *) method.decoded;
    server_channel_max = s->channel_max;
    server_frame_max = s->frame_max;
    server_heartbeat = s->heartbeat;
  }

  if (server_channel_max != 0 && server_channel_max < channel_max)
    channel_max = server_channel_max;

  if (server_frame_max != 0 && server_frame_max < frame_max)
    frame_max = server_frame_max;

  if (server_heartbeat != 0 && server_heartbeat < heartbeat)
    heartbeat = server_heartbeat;

  res = amqp_tune_connection(state, channel_max, frame_max, heartbeat);
  if (res < 0)
    return res;

  {
    amqp_connection_tune_ok_t s;
    s.frame_max = frame_max;
    s.channel_max = channel_max;
    s.heartbeat = heartbeat;

    res = amqp_send_method(state, 0, AMQP_CONNECTION_TUNE_OK_METHOD, &s);
    if (res < 0)
      return res;
  }

  amqp_release_buffers(state);

  return 0;
}

amqp_rpc_reply_t amqp_login(amqp_connection_state_t state,
			    char const *vhost,
			    int channel_max,
			    int frame_max,
			    int heartbeat,
			    amqp_sasl_method_enum sasl_method,
			    ...)
{
  va_list vl;
  amqp_rpc_reply_t result;
  int status;

  va_start(vl, sasl_method);

  status = amqp_login_inner(state, channel_max, frame_max, heartbeat, sasl_method, vl);
  if (status < 0) {
    result.reply_type = AMQP_RESPONSE_LIBRARY_EXCEPTION;
    result.reply.id = 0;
    result.reply.decoded = NULL;
    result.library_error = -status;
    return result;
  }

  {
    amqp_method_number_t replies[] = { AMQP_CONNECTION_OPEN_OK_METHOD, 0 };
    amqp_connection_open_t s;
    s.virtual_host = amqp_cstring_bytes(vhost);
    s.capabilities.len = 0;
    s.capabilities.bytes = NULL;
    s.insist = 1;

    result = amqp_simple_rpc(state,
			     0,
			     AMQP_CONNECTION_OPEN_METHOD,
			     (amqp_method_number_t *) &replies,
			     &s);
    if (result.reply_type != AMQP_RESPONSE_NORMAL)
      return result;
  }
  amqp_maybe_release_buffers(state);

  va_end(vl);

  result.reply_type = AMQP_RESPONSE_NORMAL;
  result.reply.id = 0;
  result.reply.decoded = NULL;
  result.library_error = 0;
  return result;
}