Initial agent-side code for agent to server connections
[public/netxms.git] / src / libnetxms / nxcp.cpp
1 /*
2 ** NetXMS - Network Management System
3 ** NetXMS Foundation Library
4 ** Copyright (C) 2003-2015 Victor Kirhenshtein
5 **
6 ** This program is free software; you can redistribute it and/or modify
7 ** it under the terms of the GNU Lesser General Public License as published
8 ** by the Free Software Foundation; either version 3 of the License, or
9 ** (at your option) any later version.
10 **
11 ** This program is distributed in the hope that it will be useful,
12 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
13 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 ** GNU General Public License for more details.
15 **
16 ** You should have received a copy of the GNU Lesser General Public License
17 ** along with this program; if not, write to the Free Software
18 ** Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 **
20 ** File: nxcp.cpp
21 **
22 **/
23
24 #include "libnetxms.h"
25 #include <nxstat.h>
26
27 #ifdef _WIN32
28 #define read _read
29 #define close _close
30 #endif
31
32 /**
33 * Get symbolic name for message code
34 */
35 TCHAR LIBNETXMS_EXPORTABLE *NXCPMessageCodeName(WORD code, TCHAR *pszBuffer)
36 {
37 static const TCHAR *pszMsgNames[] =
38 {
39 _T("CMD_LOGIN"),
40 _T("CMD_LOGIN_RESP"),
41 _T("CMD_KEEPALIVE"),
42 _T("CMD_OPEN_HELPDESK_ISSUE"),
43 _T("CMD_GET_OBJECTS"),
44 _T("CMD_OBJECT"),
45 _T("CMD_DELETE_OBJECT"),
46 _T("CMD_MODIFY_OBJECT"),
47 _T("CMD_OBJECT_LIST_END"),
48 _T("CMD_OBJECT_UPDATE"),
49 _T("CMD_GET_EVENTS"),
50 _T("CMD_EVENTLOG_RECORDS"),
51 _T("CMD_GET_CONFIG_VARLIST"),
52 _T("CMD_SET_CONFIG_VARIABLE"),
53 _T("CMD_GET_OBJECT_TOOLS"),
54 _T("CMD_EXECUTE_ACTION"),
55 _T("CMD_DELETE_CONFIG_VARIABLE"),
56 _T("CMD_NOTIFY"),
57 _T("CMD_TRAP"),
58 _T("CMD_OPEN_EPP"),
59 _T("CMD_CLOSE_EPP"),
60 _T("CMD_SAVE_EPP"),
61 _T("CMD_EPP_RECORD"),
62 _T("CMD_EVENT_DB_UPDATE"),
63 _T("CMD_TRAP_CFG_UPDATE"),
64 _T("CMD_SET_EVENT_INFO"),
65 _T("CMD_EVENT_DB_RECORD"),
66 _T("CMD_LOAD_EVENT_DB"),
67 _T("CMD_REQUEST_COMPLETED"),
68 _T("CMD_LOAD_USER_DB"),
69 _T("CMD_USER_DATA"),
70 _T("CMD_GROUP_DATA"),
71 _T("CMD_USER_DB_EOF"),
72 _T("CMD_UPDATE_USER"),
73 _T("CMD_DELETE_USER"),
74 _T("CMD_CREATE_USER"),
75 _T("CMD_LOCK_USER_DB"),
76 _T("CMD_UNLOCK_USER_DB"),
77 _T("CMD_USER_DB_UPDATE"),
78 _T("CMD_SET_PASSWORD"),
79 _T("CMD_GET_NODE_DCI_LIST"),
80 _T("CMD_NODE_DCI"),
81 _T("CMD_GET_LOG_DATA"),
82 _T("CMD_DELETE_NODE_DCI"),
83 _T("CMD_MODIFY_NODE_DCI"),
84 _T("CMD_UNLOCK_NODE_DCI_LIST"),
85 _T("CMD_SET_OBJECT_MGMT_STATUS"),
86 _T("CMD_CREATE_NEW_DCI"),
87 _T("CMD_GET_DCI_DATA"),
88 _T("CMD_DCI_DATA"),
89 _T("CMD_GET_MIB_TIMESTAMP"),
90 _T("CMD_GET_MIB"),
91 _T("CMD_TEST_DCI_TRANSFORMATION"),
92 _T("CMD_GET_JOB_LIST"),
93 _T("CMD_CREATE_OBJECT"),
94 _T("CMD_GET_EVENT_NAMES"),
95 _T("CMD_EVENT_NAME_LIST"),
96 _T("CMD_BIND_OBJECT"),
97 _T("CMD_UNBIND_OBJECT"),
98 _T("CMD_UNINSTALL_AGENT_POLICY"),
99 _T("CMD_OPEN_SERVER_LOG"),
100 _T("CMD_CLOSE_SERVER_LOG"),
101 _T("CMD_QUERY_LOG"),
102 _T("CMD_AUTHENTICATE"),
103 _T("CMD_GET_PARAMETER"),
104 _T("CMD_GET_LIST"),
105 _T("CMD_ACTION"),
106 _T("CMD_GET_CURRENT_USER_ATTR"),
107 _T("CMD_SET_CURRENT_USER_ATTR"),
108 _T("CMD_GET_ALL_ALARMS"),
109 _T("CMD_GET_ALARM_COMMENTS"),
110 _T("CMD_ACK_ALARM"),
111 _T("CMD_ALARM_UPDATE"),
112 _T("CMD_ALARM_DATA"),
113 _T("CMD_DELETE_ALARM"),
114 _T("CMD_ADD_CLUSTER_NODE"),
115 _T("CMD_GET_POLICY_INVENTORY"),
116 _T("CMD_LOAD_ACTIONS"),
117 _T("CMD_ACTION_DB_UPDATE"),
118 _T("CMD_MODIFY_ACTION"),
119 _T("CMD_CREATE_ACTION"),
120 _T("CMD_DELETE_ACTION"),
121 _T("CMD_ACTION_DATA"),
122 _T("CMD_SETUP_AGENT_TUNNEL"),
123 _T("<unused>"),
124 _T("<unused>"),
125 _T("<unused>"),
126 _T("<unused>"),
127 _T("CMD_POLL_NODE"),
128 _T("CMD_POLLING_INFO"),
129 _T("CMD_COPY_DCI"),
130 _T("CMD_WAKEUP_NODE"),
131 _T("CMD_DELETE_EVENT_TEMPLATE"),
132 _T("CMD_GENERATE_EVENT_CODE"),
133 _T("CMD_FIND_NODE_CONNECTION"),
134 _T("CMD_FIND_MAC_LOCATION"),
135 _T("CMD_CREATE_TRAP"),
136 _T("CMD_MODIFY_TRAP"),
137 _T("CMD_DELETE_TRAP"),
138 _T("CMD_LOAD_TRAP_CFG"),
139 _T("CMD_TRAP_CFG_RECORD"),
140 _T("CMD_QUERY_PARAMETER"),
141 _T("CMD_GET_SERVER_INFO"),
142 _T("CMD_SET_DCI_STATUS"),
143 _T("CMD_FILE_DATA"),
144 _T("CMD_TRANSFER_FILE"),
145 _T("CMD_UPGRADE_AGENT"),
146 _T("CMD_GET_PACKAGE_LIST"),
147 _T("CMD_PACKAGE_INFO"),
148 _T("CMD_REMOVE_PACKAGE"),
149 _T("CMD_INSTALL_PACKAGE"),
150 _T("CMD_LOCK_PACKAGE_DB"),
151 _T("CMD_UNLOCK_PACKAGE_DB"),
152 _T("CMD_ABORT_FILE_TRANSFER"),
153 _T("CMD_CHECK_NETWORK_SERVICE"),
154 _T("CMD_GET_AGENT_CONFIG"),
155 _T("CMD_UPDATE_AGENT_CONFIG"),
156 _T("CMD_GET_PARAMETER_LIST"),
157 _T("CMD_DEPLOY_PACKAGE"),
158 _T("CMD_INSTALLER_INFO"),
159 _T("CMD_GET_LAST_VALUES"),
160 _T("CMD_APPLY_TEMPLATE"),
161 _T("CMD_SET_USER_VARIABLE"),
162 _T("CMD_GET_USER_VARIABLE"),
163 _T("CMD_ENUM_USER_VARIABLES"),
164 _T("CMD_DELETE_USER_VARIABLE"),
165 _T("CMD_ADM_MESSAGE"),
166 _T("CMD_ADM_REQUEST"),
167 _T("CMD_GET_NETWORK_PATH"),
168 _T("CMD_REQUEST_SESSION_KEY"),
169 _T("CMD_ENCRYPTED_MESSAGE"),
170 _T("CMD_SESSION_KEY"),
171 _T("CMD_REQUEST_ENCRYPTION"),
172 _T("CMD_GET_ROUTING_TABLE"),
173 _T("CMD_EXEC_TABLE_TOOL"),
174 _T("CMD_TABLE_DATA"),
175 _T("CMD_CANCEL_JOB"),
176 _T("CMD_CHANGE_SUBSCRIPTION"),
177 _T("CMD_GET_SYSLOG"),
178 _T("CMD_SYSLOG_RECORDS"),
179 _T("CMD_JOB_CHANGE_NOTIFICATION"),
180 _T("CMD_DEPLOY_AGENT_POLICY"),
181 _T("CMD_LOG_DATA"),
182 _T("CMD_GET_OBJECT_TOOL_DETAILS"),
183 _T("CMD_EXECUTE_SERVER_COMMAND"),
184 _T("CMD_UPLOAD_FILE_TO_AGENT"),
185 _T("CMD_UPDATE_OBJECT_TOOL"),
186 _T("CMD_DELETE_OBJECT_TOOL"),
187 _T("CMD_SETUP_PROXY_CONNECTION"),
188 _T("CMD_GENERATE_OBJECT_TOOL_ID"),
189 _T("CMD_GET_SERVER_STATS"),
190 _T("CMD_GET_SCRIPT_LIST"),
191 _T("CMD_GET_SCRIPT"),
192 _T("CMD_UPDATE_SCRIPT"),
193 _T("CMD_DELETE_SCRIPT"),
194 _T("CMD_RENAME_SCRIPT"),
195 _T("CMD_GET_SESSION_LIST"),
196 _T("CMD_KILL_SESSION"),
197 _T("CMD_GET_TRAP_LOG"),
198 _T("CMD_TRAP_LOG_RECORDS"),
199 _T("CMD_START_SNMP_WALK"),
200 _T("CMD_SNMP_WALK_DATA"),
201 _T("CMD_GET_MAP_LIST"),
202 _T("CMD_LOAD_MAP"),
203 _T("CMD_SAVE_MAP"),
204 _T("CMD_DELETE_MAP"),
205 _T("CMD_RESOLVE_MAP_NAME"),
206 _T("CMD_SUBMAP_DATA"),
207 _T("CMD_UPLOAD_SUBMAP_BK_IMAGE"),
208 _T("CMD_GET_SUBMAP_BK_IMAGE"),
209 _T("CMD_GET_MODULE_LIST"),
210 _T("CMD_UPDATE_MODULE_INFO"),
211 _T("CMD_COPY_USER_VARIABLE"),
212 _T("CMD_RESOLVE_DCI_NAMES"),
213 _T("CMD_GET_MY_CONFIG"),
214 _T("CMD_GET_AGENT_CFG_LIST"),
215 _T("CMD_OPEN_AGENT_CONFIG"),
216 _T("CMD_SAVE_AGENT_CONFIG"),
217 _T("CMD_DELETE_AGENT_CONFIG"),
218 _T("CMD_SWAP_AGENT_CONFIGS"),
219 _T("CMD_TERMINATE_ALARM"),
220 _T("CMD_GET_NXCP_CAPS"),
221 _T("CMD_NXCP_CAPS"),
222 _T("CMD_GET_OBJECT_COMMENTS"),
223 _T("CMD_UPDATE_OBJECT_COMMENTS"),
224 _T("CMD_ENABLE_AGENT_TRAPS"),
225 _T("CMD_PUSH_DCI_DATA"),
226 _T("CMD_GET_ADDR_LIST"),
227 _T("CMD_SET_ADDR_LIST"),
228 _T("CMD_RESET_COMPONENT"),
229 _T("CMD_GET_DCI_EVENTS_LIST"),
230 _T("CMD_EXPORT_CONFIGURATION"),
231 _T("CMD_IMPORT_CONFIGURATION"),
232 _T("CMD_GET_TRAP_CFG_RO"),
233 _T("CMD_SNMP_REQUEST"),
234 _T("CMD_GET_DCI_INFO"),
235 _T("CMD_GET_GRAPH_LIST"),
236 _T("CMD_SAVE_GRAPH"),
237 _T("CMD_DELETE_GRAPH"),
238 _T("CMD_GET_PERFTAB_DCI_LIST"),
239 _T("CMD_ADD_CA_CERTIFICATE"),
240 _T("CMD_DELETE_CERTIFICATE"),
241 _T("CMD_GET_CERT_LIST"),
242 _T("CMD_UPDATE_CERT_COMMENTS"),
243 _T("CMD_QUERY_L2_TOPOLOGY"),
244 _T("CMD_AUDIT_RECORD"),
245 _T("CMD_GET_AUDIT_LOG"),
246 _T("CMD_SEND_SMS"),
247 _T("CMD_GET_COMMUNITY_LIST"),
248 _T("CMD_UPDATE_COMMUNITY_LIST"),
249 _T("CMD_GET_SITUATION_LIST"),
250 _T("CMD_DELETE_SITUATION"),
251 _T("CMD_CREATE_SITUATION"),
252 _T("CMD_DEL_SITUATION_INSTANCE"),
253 _T("CMD_UPDATE_SITUATION"),
254 _T("CMD_SITUATION_DATA"),
255 _T("CMD_SITUATION_CHANGE"),
256 _T("CMD_CREATE_MAP"),
257 _T("CMD_UPLOAD_FILE"),
258 _T("CMD_DELETE_FILE"),
259 _T("CMD_DELETE_REPORT_RESULTS"),
260 _T("CMD_RENDER_REPORT"),
261 _T("CMD_EXECUTE_REPORT"),
262 _T("CMD_GET_REPORT_RESULTS"),
263 _T("CMD_CONFIG_SET_CLOB"),
264 _T("CMD_CONFIG_GET_CLOB"),
265 _T("CMD_RENAME_MAP"),
266 _T("CMD_CLEAR_DCI_DATA"),
267 _T("CMD_GET_LICENSE"),
268 _T("CMD_CHECK_LICENSE"),
269 _T("CMD_RELEASE_LICENSE"),
270 _T("CMD_ISC_CONNECT_TO_SERVICE"),
271 _T("CMD_REGISTER_AGENT"),
272 _T("CMD_GET_SERVER_FILE"),
273 _T("CMD_FORWARD_EVENT"),
274 _T("CMD_GET_USM_CREDENTIALS"),
275 _T("CMD_UPDATE_USM_CREDENTIALS"),
276 _T("CMD_GET_DCI_THRESHOLDS"),
277 _T("CMD_GET_IMAGE"),
278 _T("CMD_CREATE_IMAGE"),
279 _T("CMD_DELETE_IMAGE"),
280 _T("CMD_MODIFY_IMAGE"),
281 _T("CMD_LIST_IMAGES"),
282 _T("CMD_LIST_SERVER_FILES"),
283 _T("CMD_GET_TABLE"),
284 _T("CMD_QUERY_TABLE"),
285 _T("CMD_OPEN_CONSOLE"),
286 _T("CMD_CLOSE_CONSOLE"),
287 _T("CMD_GET_SELECTED_OBJECTS"),
288 _T("CMD_GET_VLANS"),
289 _T("CMD_HOLD_JOB"),
290 _T("CMD_UNHOLD_JOB"),
291 _T("CMD_CHANGE_ZONE"),
292 _T("CMD_GET_AGENT_FILE"),
293 _T("CMD_GET_FILE_DETAILS"),
294 _T("CMD_IMAGE_LIBRARY_UPDATE"),
295 _T("CMD_GET_NODE_COMPONENTS"),
296 _T("CMD_UPDATE_ALARM_COMMENT"),
297 _T("CMD_GET_ALARM"),
298 _T("CMD_GET_TABLE_LAST_VALUES"),
299 _T("CMD_GET_TABLE_DCI_DATA"),
300 _T("CMD_GET_THRESHOLD_SUMMARY"),
301 _T("CMD_RESOLVE_ALARM"),
302 _T("CMD_FIND_IP_LOCATION"),
303 _T("CMD_REPORT_DEVICE_STATUS"),
304 _T("CMD_REPORT_DEVICE_INFO"),
305 _T("CMD_GET_ALARM_EVENTS"),
306 _T("CMD_GET_ENUM_LIST"),
307 _T("CMD_GET_TABLE_LIST"),
308 _T("CMD_GET_MAPPING_TABLE"),
309 _T("CMD_UPDATE_MAPPING_TABLE"),
310 _T("CMD_DELETE_MAPPING_TABLE"),
311 _T("CMD_LIST_MAPPING_TABLES"),
312 _T("CMD_GET_NODE_SOFTWARE"),
313 _T("CMD_GET_WINPERF_OBJECTS"),
314 _T("CMD_GET_WIRELESS_STATIONS"),
315 _T("CMD_GET_SUMMARY_TABLES"),
316 _T("CMD_MODIFY_SUMMARY_TABLE"),
317 _T("CMD_DELETE_SUMMARY_TABLE"),
318 _T("CMD_GET_SUMMARY_TABLE_DETAILS"),
319 _T("CMD_QUERY_SUMMARY_TABLE"),
320 _T("CMD_SHUTDOWN"),
321 _T("CMD_SNMP_TRAP"),
322 _T("CMD_GET_SUBNET_ADDRESS_MAP"),
323 _T("CMD_FILE_MONITORING"),
324 _T("CMD_CANCEL_FILE_MONITORING"),
325 _T("CMD_CHANGE_OBJECT_TOOL_STATUS"),
326 _T("CMD_SET_ALARM_STATUS_FLOW"),
327 _T("CMD_DELETE_ALARM_COMMENT"),
328 _T("CMD_GET_EFFECTIVE_RIGHTS"),
329 _T("CMD_GET_DCI_VALUES"),
330 _T("CMD_GET_HELPDESK_URL"),
331 _T("CMD_UNLINK_HELPDESK_ISSUE"),
332 _T("CMD_GET_FOLDER_CONTENT"),
333 _T("CMD_FILEMGR_DELETE_FILE"),
334 _T("CMD_FILEMGR_RENAME_FILE"),
335 _T("CMD_FILEMGR_MOVE_FILE"),
336 _T("CMD_FILEMGR_UPLOAD"),
337 _T("CMD_GET_SWITCH_FDB"),
338 _T("CMD_COMMAND_OUTPUT"),
339 _T("CMD_GET_LOC_HISTORY"),
340 _T("CMD_TAKE_SCREENSHOT"),
341 _T("CMD_EXECUTE_SCRIPT"),
342 _T("CMD_EXECUTE_SCRIPT_UPDATE"),
343 _T("CMD_FILEMGR_CREATE_FOLDER"),
344 _T("CMD_QUERY_ADHOC_SUMMARY_TABLE"),
345 _T("CMD_GRAPH_UPDATE"),
346 _T("CMD_SET_SERVER_CAPABILITIES"),
347 _T("CMD_FORCE_DCI_POLL"),
348 _T("CMD_GET_DCI_SCRIPT_LIST"),
349 _T("CMD_DATA_COLLECTION_CONFIG"),
350 _T("CMD_SET_SERVER_ID"),
351 _T("CMD_GET_PUBLIC_CONFIG_VAR"),
352 _T("CMD_ENABLE_FILE_UPDATES"),
353 _T("CMD_DETACH_LDAP_USER"),
354 _T("CMD_VALIDATE_PASSWORD"),
355 _T("CMD_COMPILE_SCRIPT"),
356 _T("CMD_CLEAN_AGENT_DCI_CONF"),
357 _T("CMD_RESYNC_AGENT_DCI_CONF"),
358 _T("CMD_LIST_SCHEDULE_CALLBACKS"),
359 _T("CMD_LIST_SCHEDULES"),
360 _T("CMD_ADD_SCHEDULE"),
361 _T("CMD_UPDATE_SCHEDULE"),
362 _T("CMD_REMOVE_SCHEDULE"),
363 _T("CMD_ENTER_MAINT_MODE"),
364 _T("CMD_LEAVE_MAINT_MODE"),
365 _T("CMD_JOIN_CLUSTER"),
366 _T("CMD_CLUSTER_NOTIFY"),
367 _T("CMD_ZMQ_SUBSCRIBE_EVENT"),
368 _T("CMD_ZMQ_UNSUBSCRIBE_EVENT"),
369 _T("CMD_ZMQ_SUBSCRIBE_DATA"),
370 _T("CMD_ZMQ_UNSUBSCRIBE_DATA"),
371 _T("CMD_ZMQ_GET_EVT_SUBSCRIPTIONS"),
372 _T("CMD_ZMQ_GET_DATA_SUBSCRIPTIONS"),
373 _T("CMD_GET_REPOSITORIES"),
374 _T("CMD_ADD_REPOSITORY"),
375 _T("CMD_MODIFY_REPOSITORY"),
376 _T("CMD_DELETE_REPOSITORY")
377 };
378
379 if ((code >= CMD_LOGIN) && (code <= CMD_DELETE_REPOSITORY))
380 _tcscpy(pszBuffer, pszMsgNames[code - CMD_LOGIN]);
381 else
382 _sntprintf(pszBuffer, 64, _T("CMD_0x%04X"), code);
383 return pszBuffer;
384 }
385
386 /**
387 * Receive raw CSCP message from network
388 * If pMsg is NULL, temporary buffer will be re-initialized
389 * Returns message size on success or:
390 * 0 if connection is closed
391 * <0 on socket errors
392 * 1 if message is too large to fit in buffer (normal messages is at least 16
393 * bytes long, so we never get length of 1 for valid message)
394 * In this case, only message header will be copied into buffer
395 * 2 Message decryption failed
396 * 3 Receive timeout
397 */
398 int LIBNETXMS_EXPORTABLE RecvNXCPMessageEx(SOCKET hSocket, NXCP_MESSAGE **msgBuffer,
399 NXCP_BUFFER *nxcpBuffer, UINT32 *bufferSize,
400 NXCPEncryptionContext **ppCtx,
401 BYTE **decryptionBuffer, UINT32 dwTimeout,
402 UINT32 maxMsgSize)
403 {
404 UINT32 dwMsgSize = 0, dwBytesRead = 0, dwBytesToCopy;
405 int iErr;
406 BOOL bSkipMsg = FALSE;
407
408 // Initialize buffer if requested
409 if (msgBuffer == NULL)
410 {
411 nxcpBuffer->bufferSize = 0;
412 nxcpBuffer->bufferPos = 0;
413 return 0;
414 }
415
416 // Check if we have something in buffer
417 if (nxcpBuffer->bufferSize > 0)
418 {
419 // Handle the case when entire message header have not been read into the buffer
420 if (nxcpBuffer->bufferSize < NXCP_HEADER_SIZE)
421 {
422 // Most likely we are at the buffer end, so move content
423 // to the beginning
424 memmove(nxcpBuffer->buffer, &nxcpBuffer->buffer[nxcpBuffer->bufferPos], nxcpBuffer->bufferSize);
425 nxcpBuffer->bufferPos = 0;
426
427 // Receive new portion of data from the network
428 // and append it to existing data in buffer
429 iErr = RecvEx(hSocket, &nxcpBuffer->buffer[nxcpBuffer->bufferSize],
430 NXCP_TEMP_BUF_SIZE - nxcpBuffer->bufferSize, 0, dwTimeout);
431 if (iErr <= 0)
432 return (iErr == -2) ? 3 : iErr;
433 nxcpBuffer->bufferSize += (UINT32)iErr;
434 }
435
436 // Get message size from message header and copy available
437 // message bytes from buffer
438 dwMsgSize = ntohl(((NXCP_MESSAGE *)(&nxcpBuffer->buffer[nxcpBuffer->bufferPos]))->size);
439 if (dwMsgSize > *bufferSize)
440 {
441 if ((*bufferSize >= maxMsgSize) || (dwMsgSize > maxMsgSize))
442 {
443 bSkipMsg = TRUE; // Message is too large, will skip it
444 memcpy(*msgBuffer, &nxcpBuffer->buffer[nxcpBuffer->bufferPos], NXCP_HEADER_SIZE);
445 }
446 else
447 {
448 // Increase buffer
449 *bufferSize = dwMsgSize;
450 *msgBuffer = (NXCP_MESSAGE *)realloc(*msgBuffer, *bufferSize);
451 if (decryptionBuffer != NULL)
452 *decryptionBuffer = (BYTE *)realloc(*decryptionBuffer, *bufferSize);
453 }
454 }
455 dwBytesRead = min(dwMsgSize, nxcpBuffer->bufferSize);
456 if (!bSkipMsg)
457 memcpy(*msgBuffer, &nxcpBuffer->buffer[nxcpBuffer->bufferPos], dwBytesRead);
458 nxcpBuffer->bufferSize -= dwBytesRead;
459 nxcpBuffer->bufferPos = (nxcpBuffer->bufferSize > 0) ? (nxcpBuffer->bufferPos + dwBytesRead) : 0;
460 if (dwBytesRead == dwMsgSize)
461 goto decrypt_message;
462 }
463
464 // Receive rest of message from the network
465 // Buffer is empty now
466 nxcpBuffer->bufferSize = 0;
467 nxcpBuffer->bufferPos = 0;
468 do
469 {
470 iErr = RecvEx(hSocket, &nxcpBuffer->buffer[nxcpBuffer->bufferSize],
471 NXCP_TEMP_BUF_SIZE - nxcpBuffer->bufferSize, 0, dwTimeout);
472 if (iErr <= 0)
473 return (iErr == -2) ? 3 : iErr;
474
475 if (dwBytesRead == 0) // New message?
476 {
477 if ((iErr + nxcpBuffer->bufferSize) < NXCP_HEADER_SIZE)
478 {
479 // Header not received completely
480 nxcpBuffer->bufferSize += iErr;
481 continue;
482 }
483 iErr += nxcpBuffer->bufferSize;
484 nxcpBuffer->bufferSize = 0;
485
486 dwMsgSize = ntohl(((NXCP_MESSAGE *)(nxcpBuffer->buffer))->size);
487 if (dwMsgSize > *bufferSize)
488 {
489 if ((*bufferSize >= maxMsgSize) || (dwMsgSize > maxMsgSize))
490 {
491 bSkipMsg = TRUE; // Message is too large, will skip it
492 memcpy(*msgBuffer, nxcpBuffer->buffer, NXCP_HEADER_SIZE);
493 }
494 else
495 {
496 // Increase buffer
497 *bufferSize = dwMsgSize;
498 *msgBuffer = (NXCP_MESSAGE *)realloc(*msgBuffer, *bufferSize);
499 if (decryptionBuffer != NULL)
500 *decryptionBuffer = (BYTE *)realloc(*decryptionBuffer, *bufferSize);
501 }
502 }
503 }
504 dwBytesToCopy = min((UINT32)iErr, dwMsgSize - dwBytesRead);
505 if (!bSkipMsg)
506 memcpy(((char *)(*msgBuffer)) + dwBytesRead, nxcpBuffer->buffer, dwBytesToCopy);
507 dwBytesRead += dwBytesToCopy;
508 }
509 while((dwBytesRead < dwMsgSize) || (dwBytesRead < NXCP_HEADER_SIZE));
510
511 // Check if we have something left in buffer
512 if (dwBytesToCopy < (UINT32)iErr)
513 {
514 nxcpBuffer->bufferPos = dwBytesToCopy;
515 nxcpBuffer->bufferSize = (UINT32)iErr - dwBytesToCopy;
516 }
517
518 // Check for encrypted message
519 decrypt_message:
520 if ((!bSkipMsg) && (ntohs((*msgBuffer)->code) == CMD_ENCRYPTED_MESSAGE))
521 {
522 if ((*ppCtx != NULL) && (*ppCtx != PROXY_ENCRYPTION_CTX))
523 {
524 if ((*ppCtx)->decryptMessage((NXCP_ENCRYPTED_MESSAGE *)(*msgBuffer), *decryptionBuffer))
525 {
526 dwMsgSize = ntohl((*msgBuffer)->size);
527 }
528 else
529 {
530 dwMsgSize = 2; // Decryption failed
531 }
532 }
533 else
534 {
535 if (*ppCtx != PROXY_ENCRYPTION_CTX)
536 dwMsgSize = 2;
537 }
538 }
539
540 return bSkipMsg ? 1 : (int)dwMsgSize;
541 }
542
543 int LIBNETXMS_EXPORTABLE RecvNXCPMessage(SOCKET hSocket, NXCP_MESSAGE *msgBuffer,
544 NXCP_BUFFER *nxcpBuffer, UINT32 bufferSize,
545 NXCPEncryptionContext **ppCtx,
546 BYTE *decryptionBuffer, UINT32 dwTimeout)
547 {
548 NXCP_MESSAGE *mb = msgBuffer;
549 UINT32 bs = bufferSize;
550 BYTE *db = decryptionBuffer;
551 return RecvNXCPMessageEx(hSocket, (msgBuffer != NULL) ? &mb : NULL, nxcpBuffer, &bs, ppCtx,
552 (decryptionBuffer != NULL) ? &db : NULL, dwTimeout, bufferSize);
553 }
554
555 /**
556 * Create NXCP message with raw data (MF_BINARY flag)
557 * If pBuffer is NULL, new buffer is allocated with malloc()
558 * Buffer should be of dwDataSize + NXCP_HEADER_SIZE + 8 bytes.
559 */
560 NXCP_MESSAGE LIBNETXMS_EXPORTABLE *CreateRawNXCPMessage(WORD code, UINT32 id, WORD flags,
561 UINT32 dwDataSize, void *pData,
562 NXCP_MESSAGE *pBuffer)
563 {
564 NXCP_MESSAGE *pMsg;
565 UINT32 dwPadding;
566
567 if (pBuffer == NULL)
568 pMsg = (NXCP_MESSAGE *)malloc(dwDataSize + NXCP_HEADER_SIZE + 8);
569 else
570 pMsg = pBuffer;
571
572 // Message should be aligned to 8 bytes boundary
573 dwPadding = (8 - ((dwDataSize + NXCP_HEADER_SIZE) % 8)) & 7;
574
575 pMsg->code = htons(code);
576 pMsg->flags = htons(MF_BINARY | flags);
577 pMsg->id = htonl(id);
578 pMsg->size = htonl(dwDataSize + NXCP_HEADER_SIZE + dwPadding);
579 pMsg->numFields = htonl(dwDataSize); // numFields contains actual data size for binary message
580 memcpy(pMsg->fields, pData, dwDataSize);
581
582 return pMsg;
583 }
584
585 /**
586 * Send file over CSCP
587 */
588 BOOL LIBNETXMS_EXPORTABLE SendFileOverNXCP(SOCKET hSocket, UINT32 id, const TCHAR *pszFile,
589 NXCPEncryptionContext *pCtx, long offset,
590 void (* progressCallback)(INT64, void *), void *cbArg,
591 MUTEX mutex, NXCPCompressionMethod compressionMethod)
592 {
593 int hFile, iBytes;
594 INT64 bytesTransferred = 0;
595 UINT32 dwPadding;
596 BOOL bResult = FALSE;
597 NXCP_MESSAGE *pMsg;
598 NXCP_ENCRYPTED_MESSAGE *pEnMsg;
599
600 StreamCompressor *compressor = (compressionMethod != NXCP_COMPRESSION_NONE) ? StreamCompressor::create(compressionMethod, true, FILE_BUFFER_SIZE) : NULL;
601 BYTE *compBuffer = (compressor != NULL) ? (BYTE *)malloc(FILE_BUFFER_SIZE) : NULL;
602
603 hFile = _topen(pszFile, O_RDONLY | O_BINARY);
604 if (hFile != -1)
605 {
606 NX_STAT_STRUCT st;
607 NX_FSTAT(hFile, &st);
608 long fileSize = (long)st.st_size;
609 if (labs(offset) > fileSize)
610 offset = 0;
611 long bytesToRead = (offset < 0) ? (0 - offset) : (fileSize - offset);
612
613 if (lseek(hFile, offset, (offset < 0) ? SEEK_END : SEEK_SET) != -1)
614 {
615 // Allocate message and prepare it's header
616 pMsg = (NXCP_MESSAGE *)malloc(NXCP_HEADER_SIZE + 8 + ((compressor != NULL) ? compressor->compressBufferSize(FILE_BUFFER_SIZE) + 4 : FILE_BUFFER_SIZE));
617 pMsg->id = htonl(id);
618 pMsg->code = htons(CMD_FILE_DATA);
619 pMsg->flags = htons(MF_BINARY | ((compressionMethod != NXCP_COMPRESSION_NONE) ? MF_COMPRESSED : 0));
620
621 while(1)
622 {
623 if (compressor != NULL)
624 {
625 iBytes = read(hFile, compBuffer, min(FILE_BUFFER_SIZE, bytesToRead));
626 if (iBytes < 0)
627 break;
628 bytesToRead -= iBytes;
629 // Each compressed data block prepended with 4 bytes header
630 // First byte contains compression method, second is always 0,
631 // third and fourth contains uncompressed block size in network byte order
632 *((BYTE *)pMsg->fields) = (BYTE)compressionMethod;
633 *((BYTE *)pMsg->fields + 1) = 0;
634 *((UINT16 *)((BYTE *)pMsg->fields + 2)) = htons((UINT16)iBytes);
635 iBytes = (int)compressor->compress(compBuffer, iBytes, (BYTE *)pMsg->fields + 4, compressor->compressBufferSize(FILE_BUFFER_SIZE)) + 4;
636 }
637 else
638 {
639 iBytes = read(hFile, pMsg->fields, min(FILE_BUFFER_SIZE, bytesToRead));
640 if (iBytes < 0)
641 break;
642 bytesToRead -= iBytes;
643 }
644
645 // Message should be aligned to 8 bytes boundary
646 dwPadding = (8 - (((UINT32)iBytes + NXCP_HEADER_SIZE) % 8)) & 7;
647 pMsg->size = htonl((UINT32)iBytes + NXCP_HEADER_SIZE + dwPadding);
648 pMsg->numFields = htonl((UINT32)iBytes); // numFields contains actual data size for binary message
649 if (bytesToRead <= 0)
650 pMsg->flags |= htons(MF_END_OF_FILE);
651
652 if (pCtx != NULL)
653 {
654 pEnMsg = pCtx->encryptMessage(pMsg);
655 if (pEnMsg != NULL)
656 {
657 SendEx(hSocket, (char *)pEnMsg, ntohl(pEnMsg->size), 0, mutex);
658 free(pEnMsg);
659 }
660 }
661 else
662 {
663 if (SendEx(hSocket, (char *)pMsg, (UINT32)iBytes + NXCP_HEADER_SIZE + dwPadding, 0, mutex) <= 0)
664 break; // Send error
665 }
666 if (progressCallback != NULL)
667 {
668 bytesTransferred += iBytes;
669 progressCallback(bytesTransferred, cbArg);
670 }
671
672 if (bytesToRead <= 0)
673 {
674 // End of file
675 bResult = TRUE;
676 break;
677 }
678 }
679
680 free(pMsg);
681 }
682 close(hFile);
683 }
684
685 safe_free(compBuffer);
686 delete compressor;
687
688 // If file upload failed, send CMD_ABORT_FILE_TRANSFER
689 if (!bResult)
690 {
691 NXCP_MESSAGE msg;
692
693 msg.id = htonl(id);
694 msg.code = htons(CMD_ABORT_FILE_TRANSFER);
695 msg.flags = htons(MF_BINARY);
696 msg.numFields = 0;
697 msg.size = htonl(NXCP_HEADER_SIZE);
698 if (pCtx != NULL)
699 {
700 pEnMsg = pCtx->encryptMessage(&msg);
701 if (pEnMsg != NULL)
702 {
703 SendEx(hSocket, (char *)pEnMsg, ntohl(pEnMsg->size), 0, mutex);
704 free(pEnMsg);
705 }
706 }
707 else
708 {
709 SendEx(hSocket, (char *)&msg, NXCP_HEADER_SIZE, 0, mutex);
710 }
711 }
712
713 return bResult;
714 }
715
716 /**
717 * Get version of NXCP used by peer
718 */
719 BOOL LIBNETXMS_EXPORTABLE NXCPGetPeerProtocolVersion(SOCKET hSocket, int *pnVersion, MUTEX mutex)
720 {
721 NXCP_MESSAGE msg;
722 NXCPEncryptionContext *pDummyCtx = NULL;
723 NXCP_BUFFER *pBuffer;
724 BOOL bRet = FALSE;
725 int nSize;
726
727 msg.id = 0;
728 msg.numFields = 0;
729 msg.size = htonl(NXCP_HEADER_SIZE);
730 msg.code = htons(CMD_GET_NXCP_CAPS);
731 msg.flags = htons(MF_CONTROL);
732 if (SendEx(hSocket, &msg, NXCP_HEADER_SIZE, 0, mutex) == NXCP_HEADER_SIZE)
733 {
734 pBuffer = (NXCP_BUFFER *)malloc(sizeof(NXCP_BUFFER));
735 RecvNXCPMessage(0, NULL, pBuffer, 0, NULL, NULL, 0);
736 nSize = RecvNXCPMessage(hSocket, &msg, pBuffer, NXCP_HEADER_SIZE, &pDummyCtx, NULL, 30000);
737 if ((nSize == NXCP_HEADER_SIZE) &&
738 (ntohs(msg.code) == CMD_NXCP_CAPS) &&
739 (ntohs(msg.flags) & MF_CONTROL))
740 {
741 bRet = TRUE;
742 *pnVersion = ntohl(msg.numFields) >> 24;
743 }
744 else if ((nSize == 1) || (nSize == 3) || (nSize >= NXCP_HEADER_SIZE))
745 {
746 // We don't receive any answer or receive invalid answer -
747 // assume that peer doesn't understand CMD_GET_NXCP_CAPS message
748 // and set version number to 1
749 bRet = TRUE;
750 *pnVersion = 1;
751 }
752 free(pBuffer);
753 }
754 return bRet;
755 }