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Mesh agents binaries are now loaded in server RAM by default.

This commit is contained in:
Ylian Saint-Hilaire 2019-02-14 22:16:15 -08:00
parent a2188f340f
commit 2cab56f4ad
3 changed files with 84 additions and 33 deletions
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113
meshagent.js
View File

@ -63,7 +63,7 @@ module.exports.CreateMeshAgent = function (parent, db, ws, req, args, domain) {
// Other clean up may be needed here
if (obj.unauth) { delete obj.unauth; }
if (obj.agentUpdate != null) {
obj.fs.close(obj.agentUpdate.fd);
if (obj.fs) { try { obj.fs.close(obj.agentUpdate.fd); } catch (ex) { } obj.fs = null; }
obj.parent.parent.taskLimiter.completed(obj.agentUpdate.taskid); // Indicate this task complete
obj.agentUpdate = null;
}
@ -172,16 +172,48 @@ module.exports.CreateMeshAgent = function (parent, db, ws, req, args, domain) {
// Mesh agent update required, do it using task limiter so not to flood the network. Medium priority task.
obj.parent.parent.taskLimiter.launch(function (argument, taskid, taskLimiterQueue) {
if (obj.nodeid != null) { obj.parent.parent.debug(1, 'Agent update required, NodeID=0x' + obj.nodeid.substring(0, 16) + ', ' + obj.agentExeInfo.desc); }
obj.fs.open(obj.agentExeInfo.path, 'r', function (err, fd) {
if (err) { return console.error(err); }
obj.agentUpdate = { oldHash: agenthash, ptr: 0, buf: Buffer.alloc(agentUpdateBlockSize + 4), fd: fd, taskid: taskid };
if (obj.agentExeInfo.data == null) {
// Read the agent from disk
obj.fs.open(obj.agentExeInfo.path, 'r', function (err, fd) {
if (err) { return console.error(err); }
obj.agentUpdate = { oldHash: agenthash, ptr: 0, buf: Buffer.alloc(agentUpdateBlockSize + 4), fd: fd, taskid: taskid };
// MeshCommand_CoreModule, ask mesh agent to clear the core.
// The new core will only be sent after the agent updates.
obj.send(obj.common.ShortToStr(10) + obj.common.ShortToStr(0));
// We got the agent file open on the server side, tell the agent we are sending an update starting with the SHA384 hash of the result
//console.log("Agent update file open.");
obj.send(obj.common.ShortToStr(13) + obj.common.ShortToStr(0)); // Command 13, start mesh agent download
// Send the first mesh agent update data block
obj.agentUpdate.buf[0] = 0;
obj.agentUpdate.buf[1] = 14;
obj.agentUpdate.buf[2] = 0;
obj.agentUpdate.buf[3] = 1;
var len = -1;
try { len = obj.fs.readSync(obj.agentUpdate.fd, obj.agentUpdate.buf, 4, agentUpdateBlockSize, obj.agentUpdate.ptr); } catch (e) { }
if (len == -1) {
// Error reading the agent file, stop here.
obj.fs.close(obj.agentUpdate.fd);
obj.parent.parent.taskLimiter.completed(obj.agentUpdate.taskid); // Indicate this task complete
obj.agentUpdate = null;
} else {
// Send the first block to the agent
obj.agentUpdate.ptr += len;
//console.log("Agent update send first block: " + len);
obj.send(obj.agentUpdate.buf); // Command 14, mesh agent first data block
}
});
} else {
// Send the agent from RAM
obj.agentUpdate = { oldHash: agenthash, ptr: 0, buf: Buffer.alloc(agentUpdateBlockSize + 4), taskid: taskid };
// MeshCommand_CoreModule, ask mesh agent to clear the core.
// The new core will only be sent after the agent updates.
obj.send(obj.common.ShortToStr(10) + obj.common.ShortToStr(0));
// We got the agent file open on the server side, tell the agent we are sending an update starting with the SHA384 hash of the result
//console.log("Agent update file open.");
obj.send(obj.common.ShortToStr(13) + obj.common.ShortToStr(0)); // Command 13, start mesh agent download
// Send the first mesh agent update data block
@ -189,20 +221,19 @@ module.exports.CreateMeshAgent = function (parent, db, ws, req, args, domain) {
obj.agentUpdate.buf[1] = 14;
obj.agentUpdate.buf[2] = 0;
obj.agentUpdate.buf[3] = 1;
var len = -1;
try { len = obj.fs.readSync(obj.agentUpdate.fd, obj.agentUpdate.buf, 4, agentUpdateBlockSize, obj.agentUpdate.ptr); } catch (e) { }
if (len == -1) {
// Error reading the agent file, stop here.
obj.fs.close(obj.agentUpdate.fd);
var len = Math.min(agentUpdateBlockSize, obj.agentExeInfo.data.length - obj.agentUpdate.ptr);
if (len > 0) {
// Send the first block
obj.agentExeInfo.data.copy(obj.agentUpdate.buf, 4, obj.agentUpdate.ptr, obj.agentUpdate.ptr + len);
obj.agentUpdate.ptr += len;
obj.send(obj.agentUpdate.buf); // Command 14, mesh agent first data block
} else {
// Error
obj.parent.parent.taskLimiter.completed(obj.agentUpdate.taskid); // Indicate this task complete
obj.agentUpdate = null;
} else {
// Send the first block to the agent
obj.agentUpdate.ptr += len;
//console.log("Agent update send first block: " + len);
obj.send(obj.agentUpdate.buf); // Command 14, mesh agent first data block
}
});
}
}, null, 1);
} else {
@ -217,25 +248,43 @@ module.exports.CreateMeshAgent = function (parent, db, ws, req, args, domain) {
if ((msg.length == 4) && (obj.agentUpdate != null)) {
var status = obj.common.ReadShort(msg, 2);
if (status == 1) {
var len = -1;
try { len = obj.fs.readSync(obj.agentUpdate.fd, obj.agentUpdate.buf, 4, agentUpdateBlockSize, obj.agentUpdate.ptr); } catch (e) { }
if (len == -1) {
// Error reading the agent file, stop here.
obj.fs.close(obj.agentUpdate.fd);
obj.parent.parent.taskLimiter.completed(obj.agentUpdate.taskid); // Indicate this task complete
obj.agentUpdate = null;
} else {
// Send the next block to the agent
obj.agentUpdate.ptr += len;
//console.log("Agent update send next block", obj.agentUpdate.ptr, len);
if (len == agentUpdateBlockSize) { obj.send(obj.agentUpdate.buf); } else { obj.send(obj.agentUpdate.buf.slice(0, len + 4)); } // Command 14, mesh agent next data block
if (len < agentUpdateBlockSize) {
//console.log("Agent update sent");
obj.send(obj.common.ShortToStr(13) + obj.common.ShortToStr(0) + obj.common.hex2rstr(obj.agentExeInfo.hash)); // Command 13, end mesh agent download, send agent SHA384 hash
if (obj.agentExeInfo.data == null) {
// Read the agent from disk
var len = -1;
try { len = obj.fs.readSync(obj.agentUpdate.fd, obj.agentUpdate.buf, 4, agentUpdateBlockSize, obj.agentUpdate.ptr); } catch (e) { }
if (len == -1) {
// Error reading the agent file, stop here.
obj.fs.close(obj.agentUpdate.fd);
obj.parent.parent.taskLimiter.completed(obj.agentUpdate.taskid); // Indicate this task complete
obj.agentUpdate = null;
} else {
// Send the next block to the agent
obj.agentUpdate.ptr += len;
//console.log("Agent update send next block", obj.agentUpdate.ptr, len);
if (len == agentUpdateBlockSize) { obj.send(obj.agentUpdate.buf); } else { obj.send(obj.agentUpdate.buf.slice(0, len + 4)); } // Command 14, mesh agent next data block
if (len < agentUpdateBlockSize) {
//console.log("Agent update sent from disk.");
obj.send(obj.common.ShortToStr(13) + obj.common.ShortToStr(0) + obj.common.hex2rstr(obj.agentExeInfo.hash)); // Command 13, end mesh agent download, send agent SHA384 hash
obj.fs.close(obj.agentUpdate.fd);
obj.parent.parent.taskLimiter.completed(obj.agentUpdate.taskid); // Indicate this task complete
obj.agentUpdate = null;
}
}
} else {
// Send the agent from RAM
var len = Math.min(agentUpdateBlockSize, obj.agentExeInfo.data.length - obj.agentUpdate.ptr);
if (len > 0) {
obj.agentExeInfo.data.copy(obj.agentUpdate.buf, 4, obj.agentUpdate.ptr, obj.agentUpdate.ptr + len);
if (len == agentUpdateBlockSize) { obj.send(obj.agentUpdate.buf); } else { obj.send(obj.agentUpdate.buf.slice(0, len + 4)); } // Command 14, mesh agent next data block
obj.agentUpdate.ptr += len;
}
if (obj.agentUpdate.ptr == obj.agentExeInfo.data.length) {
//console.log("Agent update sent from RAM.");
obj.send(obj.common.ShortToStr(13) + obj.common.ShortToStr(0) + obj.common.hex2rstr(obj.agentExeInfo.hash)); // Command 13, end mesh agent download, send agent SHA384 hash
obj.parent.parent.taskLimiter.completed(obj.agentUpdate.taskid); // Indicate this task complete
obj.agentUpdate = null;
}
}
}

2
meshcentral.js
View File

@ -1265,10 +1265,12 @@ function CreateMeshCentralServer(config, args) {
obj.meshAgentBinaries[archid].path = agentpath;
obj.meshAgentBinaries[archid].url = ((obj.args.notls == true) ? 'http://' : 'https://') + obj.certificates.CommonName + ':' + obj.args.port + '/meshagents?id=' + archid;
obj.meshAgentBinaries[archid].size = stats.size;
if (!obj.args.agentsondisk) { obj.meshAgentBinaries[archid].data = obj.fs.readFileSync(agentpath); }
// If this is a windows binary, pull binary information
if (obj.meshAgentsArchitectureNumbers[archid].platform == 'win32') {
try { obj.meshAgentBinaries[archid].pe = obj.exeHandler.parseWindowsExecutable(agentpath); } catch (e) { }
}
// Hash the binary
var hashStream = obj.crypto.createHash('sha384');
hashStream.archid = archid;

2
package.json
View File

@ -1,6 +1,6 @@
{
"name": "meshcentral",
"version": "0.2.8-k",
"version": "0.2.8-l",
"keywords": [
"Remote Management",
"Intel AMT",