client size API for reading routing table; protocol changes
[public/netxms.git] / src / libnetxms / nxcp.cpp
1 /*
2 ** NetXMS - Network Management System
3 ** NetXMS Foundation Library
4 ** Copyright (C) 2003-2014 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 wCode, 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_GET_CONTAINER_CAT_LIST"),
123 _T("CMD_CONTAINER_CAT_DATA"),
124 _T("CMD_DELETE_CONTAINER_CAT"),
125 _T("CMD_CREATE_CONTAINER_CAT"),
126 _T("CMD_MODIFY_CONTAINER_CAT"),
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 };
339
340 if ((wCode >= CMD_LOGIN) && (wCode <= CMD_GET_SWITCH_FDB))
341 _tcscpy(pszBuffer, pszMsgNames[wCode - CMD_LOGIN]);
342 else
343 _sntprintf(pszBuffer, 64, _T("CMD_0x%04X"), wCode);
344 return pszBuffer;
345 }
346
347 /**
348 * Receive raw CSCP message from network
349 * If pMsg is NULL, temporary buffer will be re-initialized
350 * Returns message size on success or:
351 * 0 if connection is closed
352 * <0 on socket errors
353 * 1 if message is too large to fit in buffer (normal messages is at least 16
354 * bytes long, so we never get length of 1 for valid message)
355 * In this case, only message header will be copied into buffer
356 * 2 Message decryption failed
357 * 3 Receive timeout
358 */
359 int LIBNETXMS_EXPORTABLE RecvNXCPMessageEx(SOCKET hSocket, CSCP_MESSAGE **msgBuffer,
360 CSCP_BUFFER *nxcpBuffer, UINT32 *bufferSize,
361 NXCPEncryptionContext **ppCtx,
362 BYTE **decryptionBuffer, UINT32 dwTimeout,
363 UINT32 maxMsgSize)
364 {
365 UINT32 dwMsgSize = 0, dwBytesRead = 0, dwBytesToCopy;
366 int iErr;
367 BOOL bSkipMsg = FALSE;
368
369 // Initialize buffer if requested
370 if (msgBuffer == NULL)
371 {
372 nxcpBuffer->dwBufSize = 0;
373 nxcpBuffer->dwBufPos = 0;
374 return 0;
375 }
376
377 // Check if we have something in buffer
378 if (nxcpBuffer->dwBufSize > 0)
379 {
380 // Handle the case when entire message header have not been read into the buffer
381 if (nxcpBuffer->dwBufSize < CSCP_HEADER_SIZE)
382 {
383 // Most likely we are at the buffer end, so move content
384 // to the beginning
385 memmove(nxcpBuffer->szBuffer, &nxcpBuffer->szBuffer[nxcpBuffer->dwBufPos], nxcpBuffer->dwBufSize);
386 nxcpBuffer->dwBufPos = 0;
387
388 // Receive new portion of data from the network
389 // and append it to existing data in buffer
390 iErr = RecvEx(hSocket, &nxcpBuffer->szBuffer[nxcpBuffer->dwBufSize],
391 CSCP_TEMP_BUF_SIZE - nxcpBuffer->dwBufSize, 0, dwTimeout);
392 if (iErr <= 0)
393 return (iErr == -2) ? 3 : iErr;
394 nxcpBuffer->dwBufSize += (UINT32)iErr;
395 }
396
397 // Get message size from message header and copy available
398 // message bytes from buffer
399 dwMsgSize = ntohl(((CSCP_MESSAGE *)(&nxcpBuffer->szBuffer[nxcpBuffer->dwBufPos]))->dwSize);
400 if (dwMsgSize > *bufferSize)
401 {
402 if ((*bufferSize >= maxMsgSize) || (dwMsgSize > maxMsgSize))
403 {
404 bSkipMsg = TRUE; // Message is too large, will skip it
405 memcpy(*msgBuffer, &nxcpBuffer->szBuffer[nxcpBuffer->dwBufPos], CSCP_HEADER_SIZE);
406 }
407 else
408 {
409 // Increase buffer
410 *bufferSize = dwMsgSize;
411 *msgBuffer = (CSCP_MESSAGE *)realloc(*msgBuffer, *bufferSize);
412 if (decryptionBuffer != NULL)
413 *decryptionBuffer = (BYTE *)realloc(*decryptionBuffer, *bufferSize);
414 }
415 }
416 dwBytesRead = min(dwMsgSize, nxcpBuffer->dwBufSize);
417 if (!bSkipMsg)
418 memcpy(*msgBuffer, &nxcpBuffer->szBuffer[nxcpBuffer->dwBufPos], dwBytesRead);
419 nxcpBuffer->dwBufSize -= dwBytesRead;
420 nxcpBuffer->dwBufPos = (nxcpBuffer->dwBufSize > 0) ? (nxcpBuffer->dwBufPos + dwBytesRead) : 0;
421 if (dwBytesRead == dwMsgSize)
422 goto decrypt_message;
423 }
424
425 // Receive rest of message from the network
426 // Buffer is empty now
427 nxcpBuffer->dwBufSize = 0;
428 nxcpBuffer->dwBufPos = 0;
429 do
430 {
431 iErr = RecvEx(hSocket, &nxcpBuffer->szBuffer[nxcpBuffer->dwBufSize],
432 CSCP_TEMP_BUF_SIZE - nxcpBuffer->dwBufSize, 0, dwTimeout);
433 if (iErr <= 0)
434 return (iErr == -2) ? 3 : iErr;
435
436 if (dwBytesRead == 0) // New message?
437 {
438 if ((iErr + nxcpBuffer->dwBufSize) < CSCP_HEADER_SIZE)
439 {
440 // Header not received completely
441 nxcpBuffer->dwBufSize += iErr;
442 continue;
443 }
444 iErr += nxcpBuffer->dwBufSize;
445 nxcpBuffer->dwBufSize = 0;
446
447 dwMsgSize = ntohl(((CSCP_MESSAGE *)(nxcpBuffer->szBuffer))->dwSize);
448 if (dwMsgSize > *bufferSize)
449 {
450 if ((*bufferSize >= maxMsgSize) || (dwMsgSize > maxMsgSize))
451 {
452 bSkipMsg = TRUE; // Message is too large, will skip it
453 memcpy(*msgBuffer, nxcpBuffer->szBuffer, CSCP_HEADER_SIZE);
454 }
455 else
456 {
457 // Increase buffer
458 *bufferSize = dwMsgSize;
459 *msgBuffer = (CSCP_MESSAGE *)realloc(*msgBuffer, *bufferSize);
460 if (decryptionBuffer != NULL)
461 *decryptionBuffer = (BYTE *)realloc(*decryptionBuffer, *bufferSize);
462 }
463 }
464 }
465 dwBytesToCopy = min((UINT32)iErr, dwMsgSize - dwBytesRead);
466 if (!bSkipMsg)
467 memcpy(((char *)(*msgBuffer)) + dwBytesRead, nxcpBuffer->szBuffer, dwBytesToCopy);
468 dwBytesRead += dwBytesToCopy;
469 }
470 while((dwBytesRead < dwMsgSize) || (dwBytesRead < CSCP_HEADER_SIZE));
471
472 // Check if we have something left in buffer
473 if (dwBytesToCopy < (UINT32)iErr)
474 {
475 nxcpBuffer->dwBufPos = dwBytesToCopy;
476 nxcpBuffer->dwBufSize = (UINT32)iErr - dwBytesToCopy;
477 }
478
479 // Check for encrypted message
480 decrypt_message:
481 if ((!bSkipMsg) && (ntohs((*msgBuffer)->wCode) == CMD_ENCRYPTED_MESSAGE))
482 {
483 if ((*ppCtx != NULL) && (*ppCtx != PROXY_ENCRYPTION_CTX))
484 {
485 if (CSCPDecryptMessage(*ppCtx, (CSCP_ENCRYPTED_MESSAGE *)(*msgBuffer), *decryptionBuffer))
486 {
487 dwMsgSize = ntohl((*msgBuffer)->dwSize);
488 }
489 else
490 {
491 dwMsgSize = 2; // Decryption failed
492 }
493 }
494 else
495 {
496 if (*ppCtx != PROXY_ENCRYPTION_CTX)
497 dwMsgSize = 2;
498 }
499 }
500
501 return bSkipMsg ? 1 : (int)dwMsgSize;
502 }
503
504 int LIBNETXMS_EXPORTABLE RecvNXCPMessage(SOCKET hSocket, CSCP_MESSAGE *msgBuffer,
505 CSCP_BUFFER *nxcpBuffer, UINT32 bufferSize,
506 NXCPEncryptionContext **ppCtx,
507 BYTE *decryptionBuffer, UINT32 dwTimeout)
508 {
509 CSCP_MESSAGE *mb = msgBuffer;
510 UINT32 bs = bufferSize;
511 BYTE *db = decryptionBuffer;
512 return RecvNXCPMessageEx(hSocket, (msgBuffer != NULL) ? &mb : NULL, nxcpBuffer, &bs, ppCtx,
513 (decryptionBuffer != NULL) ? &db : NULL, dwTimeout, bufferSize);
514 }
515
516 /**
517 * Create NXCP message with raw data (MF_BINARY flag)
518 * If pBuffer is NULL, new buffer is allocated with malloc()
519 * Buffer should be of dwDataSize + CSCP_HEADER_SIZE + 8 bytes.
520 */
521 CSCP_MESSAGE LIBNETXMS_EXPORTABLE *CreateRawNXCPMessage(WORD wCode, UINT32 dwId, WORD wFlags,
522 UINT32 dwDataSize, void *pData,
523 CSCP_MESSAGE *pBuffer)
524 {
525 CSCP_MESSAGE *pMsg;
526 UINT32 dwPadding;
527
528 if (pBuffer == NULL)
529 pMsg = (CSCP_MESSAGE *)malloc(dwDataSize + CSCP_HEADER_SIZE + 8);
530 else
531 pMsg = pBuffer;
532
533 // Message should be aligned to 8 bytes boundary
534 dwPadding = (8 - ((dwDataSize + CSCP_HEADER_SIZE) % 8)) & 7;
535
536 pMsg->wCode = htons(wCode);
537 pMsg->wFlags = htons(MF_BINARY | wFlags);
538 pMsg->dwId = htonl(dwId);
539 pMsg->dwSize = htonl(dwDataSize + CSCP_HEADER_SIZE + dwPadding);
540 pMsg->dwNumVars = htonl(dwDataSize); // dwNumVars contains actual data size for binary message
541 memcpy(pMsg->df, pData, dwDataSize);
542
543 return pMsg;
544 }
545
546 /**
547 * Send file over CSCP
548 */
549 BOOL LIBNETXMS_EXPORTABLE SendFileOverNXCP(SOCKET hSocket, UINT32 dwId, const TCHAR *pszFile,
550 NXCPEncryptionContext *pCtx, long offset,
551 void (* progressCallback)(INT64, void *), void *cbArg,
552 MUTEX mutex)
553 {
554 int hFile, iBytes;
555 INT64 bytesTransferred = 0;
556 UINT32 dwPadding;
557 BOOL bResult = FALSE;
558 CSCP_MESSAGE *pMsg;
559 CSCP_ENCRYPTED_MESSAGE *pEnMsg;
560
561 hFile = _topen(pszFile, O_RDONLY | O_BINARY);
562 if (hFile != -1)
563 {
564 NX_STAT_STRUCT st;
565 NX_FSTAT(hFile, &st);
566 long fileSize = (long)st.st_size;
567 if (labs(offset) > fileSize)
568 offset = 0;
569 long bytesToRead = (offset < 0) ? (0 - offset) : (fileSize - offset);
570
571 if (lseek(hFile, offset, (offset < 0) ? SEEK_END : SEEK_SET) != -1)
572 {
573 // Allocate message and prepare it's header
574 pMsg = (CSCP_MESSAGE *)malloc(FILE_BUFFER_SIZE + CSCP_HEADER_SIZE + 8);
575 pMsg->dwId = htonl(dwId);
576 pMsg->wCode = htons(CMD_FILE_DATA);
577 pMsg->wFlags = htons(MF_BINARY);
578
579 while(1)
580 {
581 iBytes = read(hFile, pMsg->df, min(FILE_BUFFER_SIZE, bytesToRead));
582 if (iBytes < 0)
583 break;
584
585 // Message should be aligned to 8 bytes boundary
586 dwPadding = (8 - (((UINT32)iBytes + CSCP_HEADER_SIZE) % 8)) & 7;
587 pMsg->dwSize = htonl((UINT32)iBytes + CSCP_HEADER_SIZE + dwPadding);
588 pMsg->dwNumVars = htonl((UINT32)iBytes); // dwNumVars contains actual data size for binary message
589 bytesToRead -= iBytes;
590 if (bytesToRead <= 0)
591 pMsg->wFlags |= htons(MF_END_OF_FILE);
592
593 if (pCtx != NULL)
594 {
595 pEnMsg = CSCPEncryptMessage(pCtx, pMsg);
596 if (pEnMsg != NULL)
597 {
598 SendEx(hSocket, (char *)pEnMsg, ntohl(pEnMsg->dwSize), 0, mutex);
599 free(pEnMsg);
600 }
601 }
602 else
603 {
604 if (SendEx(hSocket, (char *)pMsg, (UINT32)iBytes + CSCP_HEADER_SIZE + dwPadding, 0, mutex) <= 0)
605 break; // Send error
606 }
607 if (progressCallback != NULL)
608 {
609 bytesTransferred += iBytes;
610 progressCallback(bytesTransferred, cbArg);
611 }
612
613 if (bytesToRead <= 0)
614 {
615 // End of file
616 bResult = TRUE;
617 break;
618 }
619 }
620
621 free(pMsg);
622 }
623 close(hFile);
624 }
625
626 // If file upload failed, send CMD_ABORT_FILE_TRANSFER
627 if (!bResult)
628 {
629 CSCP_MESSAGE msg;
630
631 msg.dwId = htonl(dwId);
632 msg.wCode = htons(CMD_ABORT_FILE_TRANSFER);
633 msg.wFlags = htons(MF_BINARY);
634 msg.dwNumVars = 0;
635 msg.dwSize = htonl(CSCP_HEADER_SIZE);
636 if (pCtx != NULL)
637 {
638 pEnMsg = CSCPEncryptMessage(pCtx, &msg);
639 if (pEnMsg != NULL)
640 {
641 SendEx(hSocket, (char *)pEnMsg, ntohl(pEnMsg->dwSize), 0, mutex);
642 free(pEnMsg);
643 }
644 }
645 else
646 {
647 SendEx(hSocket, (char *)&msg, CSCP_HEADER_SIZE, 0, mutex);
648 }
649 }
650
651 return bResult;
652 }
653
654 /**
655 * Get version of NXCP used by peer
656 */
657 BOOL LIBNETXMS_EXPORTABLE NXCPGetPeerProtocolVersion(SOCKET hSocket, int *pnVersion, MUTEX mutex)
658 {
659 CSCP_MESSAGE msg;
660 NXCPEncryptionContext *pDummyCtx = NULL;
661 CSCP_BUFFER *pBuffer;
662 BOOL bRet = FALSE;
663 int nSize;
664
665 msg.dwId = 0;
666 msg.dwNumVars = 0;
667 msg.dwSize = htonl(CSCP_HEADER_SIZE);
668 msg.wCode = htons(CMD_GET_NXCP_CAPS);
669 msg.wFlags = htons(MF_CONTROL);
670 if (SendEx(hSocket, &msg, CSCP_HEADER_SIZE, 0, mutex) == CSCP_HEADER_SIZE)
671 {
672 pBuffer = (CSCP_BUFFER *)malloc(sizeof(CSCP_BUFFER));
673 RecvNXCPMessage(0, NULL, pBuffer, 0, NULL, NULL, 0);
674 nSize = RecvNXCPMessage(hSocket, &msg, pBuffer, CSCP_HEADER_SIZE, &pDummyCtx, NULL, 30000);
675 if ((nSize == CSCP_HEADER_SIZE) &&
676 (ntohs(msg.wCode) == CMD_NXCP_CAPS) &&
677 (ntohs(msg.wFlags) & MF_CONTROL))
678 {
679 bRet = TRUE;
680 *pnVersion = ntohl(msg.dwNumVars) >> 24;
681 }
682 else if ((nSize == 1) || (nSize == 3) || (nSize >= CSCP_HEADER_SIZE))
683 {
684 // We don't receive any answer or receive invalid answer -
685 // assume that peer doesn't understand CMD_GET_NXCP_CAPS message
686 // and set version number to 1
687 bRet = TRUE;
688 *pnVersion = 1;
689 }
690 free(pBuffer);
691 }
692 return bRet;
693 }