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rpc/MicroLMS/microstack/ILibLMS.c
Mudit Vats eb42f1e89d Update license.
2020-09-08 13:40:45 -07:00

834 lines
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/*********************************************************************
* Copyright (c) Intel Corporation 2011 - 2020
* SPDX-License-Identifier: Apache-2.0
**********************************************************************/
/*
Real LMS code can be found here: http://software.intel.com/en-us/articles/download-the-latest-intel-amt-open-source-drivers
*/
#if !defined(_NOHECI)
#if defined(WIN32) && !defined(_MINCORE)
#define _CRTDBG_MAP_ALLOC
#include <stdlib.h>
#include <crtdbg.h>
#else
#include <stdlib.h>
#endif
#if defined(WINSOCK2)
#include <winsock2.h>
#include <ws2ipdef.h>
#elif defined(WINSOCK1)
#include <winsock.h>
#include <wininet.h>
#endif
#include "ILibParsers.h"
#include "ILibAsyncSocket.h"
#include "ILibAsyncServerSocket.h"
#ifdef WIN32
#include "../heci/heciwin.h"
#include "WinBase.h"
#endif
#ifdef _POSIX
#include "../heci/HECILinux.h"
#define UNREFERENCED_PARAMETER(P) (P)
#endif
#include "../heci/PTHICommand.h"
#include "../heci/LMEConnection.h"
#define INET_SOCKADDR_LENGTH(x) ((x==AF_INET6?sizeof(struct sockaddr_in6):sizeof(struct sockaddr_in)))
#define LMS_MAX_CONNECTIONS 16 // Maximum is 32
#define LMS_MAX_SESSIONS 32
// #define _DEBUGLMS
#ifdef _DEBUGLMS
#define LMSDEBUG(...) printf(__VA_ARGS__);
#else
#define LMSDEBUG(...)
#endif
char * g_SelfLMSDir=NULL;
int LastId = 2;
struct ILibLMS_StateModule* IlibExternLMS = NULL; // Glocal pointer to the LMS module. Since we can only have one of these modules running, a global pointer is sometimes useful.
void ILibLMS_SetupConnection(struct ILibLMS_StateModule* module, int i);
void ILibLMS_LaunchHoldingSessions(struct ILibLMS_StateModule* module);
// Each LMS session can be in one of these states.
enum LME_CHANNEL_STATUS {
LME_CS_FREE = 0, // The session slot is free, can be used at any time.
LME_CS_PENDING_CONNECT = 1, // A connection as been made to LMS and a notice has been send to Intel AMT asking for a CHANNEL OPEN.
LME_CS_CONNECTED = 2, // Intel AMT confirmed the connection and data can flow in both directions.
LME_CS_PENDING_LMS_DISCONNECT = 3, // The connection to LMS was disconnected, Intel AMT has been notified and we are waitting for Intel AMT confirmation.
LME_CS_PENDING_AMT_DISCONNECT = 4, // Intel AMT decided to close the connection. We are disconnecting the LMS TCP connection.
LME_CS_HOLDING = 5, // We got too much data from the LMS TCP connection, more than Intel AMT can handle. We are holding the connection until AMT can handle more.
LME_CS_CONNECTION_WAIT = 6 // A TCP connection to LMS was made, but there all LMS connections are currently busy. Waitting for one to free up.
};
// This is the structure for a session
struct LMEChannel
{
int ourid; // The iddentifier of this channel on our side, this is the same as the index in the "Channel Sessions[LMS_MAX_SESSIONS];" array below.
int amtid; // The Intel AMT identifier for this channel.
enum LME_CHANNEL_STATUS status; // Current status of the channel.
int sockettype; // Type of connected socket: 0 = TCP, 1 = WebSocket
void* socketmodule; // The microstack associated with the LMS connection.
int txwindow; // Transmit window.
int rxwindow; // Receive window.
unsigned short localport; // The Intel AMT connection port.
int errorcount; // Open channel error count.
char* pending; // Buffer pointing to pending data that needs to be sent to Intel AMT, used for websocket only.
int pendingcount; // Buffer pointing to pending data size that needs to be sent to Intel AMT, used for websocket only.
int pendingptr; // Pointer to start of the pending buffer.
};
enum LME_VERSION_HANDSHAKING {
LME_NOT_INITIATED,
LME_INITIATED,
LME_AGREED
};
enum LME_SERVICE_STATUS {
LME_NOT_STARTED,
LME_STARTED
};
// This is the Intel AMT LMS chain module structure
struct ILibLMS_StateModule
{
ILibChain_Link ChainLink;
void *Server1; // Microstack TCP server for port 16992
void *Server2; // Microstack TCP server for port 16993
void *ControlSocket; // Pointer to the LMS control web socket, NULL if not connected.
struct LMEConnection MeConnection; // The MEI connection structure
struct LMEChannel Sessions[LMS_MAX_SESSIONS]; // List of sessions
//ILibWebServer_ServerToken WebServer; // LMS Web Server
enum LME_VERSION_HANDSHAKING handshakingStatus;
enum LME_SERVICE_STATUS pfwdService;
unsigned int AmtProtVersionMajor; // Intel AMT MEI major version
unsigned int AmtProtVersionMinor; // Intel AMT MEI minor version
sem_t Lock; // Global lock, this is needed because MEI listener is a different thread from the microstack thread
};
/*
// Convert a block of data to HEX
// The "out" must have (len*2)+1 free space.
char utils_HexTable[16] = { '0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f' };
char* __fastcall util_tohex(char* data, int len, char* out)
{
int i;
char *p = out;
if (data == NULL || len == 0) { *p = 0; return NULL; }
for (i = 0; i < len; i++)
{
*(p++) = utils_HexTable[((unsigned char)data[i]) >> 4];
*(p++) = utils_HexTable[((unsigned char)data[i]) & 0x0F];
}
*p = 0;
return out;
}
*/
int GetFreeSlot(struct ILibLMS_StateModule* module){
int i;
int cur = LastId;
// Look for an empty session
for (i = 0; i < LMS_MAX_SESSIONS-3; i++) {
cur++;
if (cur >= LMS_MAX_SESSIONS){
cur = 3;
}
if (module->Sessions[cur].status == LME_CS_FREE) {
LastId = cur;
return cur;
}
}
return -1;
}
//int GetFreeSlot(struct ILibLMS_StateModule* module){
// int i;
// for (i = 0; i < LMS_MAX_SESSIONS - 3; i++) {
// if (cur >= LMS_MAX_SESSIONS){
// cur = 3;
// }
// if (module->Sessions[cur].status == LME_CS_FREE) {
// LastId = cur;
// return cur;
// }
// }
// return -1;
//}
// This function is called each time a MEI message is received from Intel AMT
void ILibLMS_MEICallback(struct LMEConnection* lmemodule, void *param, void *rxBuffer, unsigned int len)
{
struct ILibLMS_StateModule* module = (struct ILibLMS_StateModule*)param;
int disconnects = 0; // This is a counter of how many sessions are freed up. We use this at the end to place HOLDING sessions into free slots.
//ILibAsyncServerSocket_ServerModule newModule;
//ILibLinkedList list;
//void* node;
//ILibTransport* curModule;
// Happens when the chain is being destroyed, don't call anything chain related.
if (rxBuffer == NULL) return;
sem_wait(&(module->Lock));
LMSDEBUG("ILibLMS_MEICallback %d\r\n", ((unsigned char*)rxBuffer)[0]);
switch (((unsigned char*)rxBuffer)[0])
{
case APF_GLOBAL_REQUEST: // 80
{
int request = 0;
unsigned char *pCurrent;
APF_GENERIC_HEADER *pHeader = (APF_GENERIC_HEADER *)rxBuffer;
pHeader->StringLength = ntohl(pHeader->StringLength);
if (pHeader->StringLength == APF_STR_SIZE_OF(APF_GLOBAL_REQUEST_STR_TCP_FORWARD_REQUEST) && memcmp(pHeader->String, APF_GLOBAL_REQUEST_STR_TCP_FORWARD_REQUEST, APF_STR_SIZE_OF(APF_GLOBAL_REQUEST_STR_TCP_FORWARD_REQUEST)) == 0) { request = 1; }
else if (pHeader->StringLength == APF_STR_SIZE_OF(APF_GLOBAL_REQUEST_STR_TCP_FORWARD_CANCEL_REQUEST) && memcmp(pHeader->String, APF_GLOBAL_REQUEST_STR_TCP_FORWARD_CANCEL_REQUEST, APF_STR_SIZE_OF(APF_GLOBAL_REQUEST_STR_TCP_FORWARD_CANCEL_REQUEST)) == 0) { request = 2; }
else if (pHeader->StringLength == APF_STR_SIZE_OF(APF_GLOBAL_REQUEST_STR_UDP_SEND_TO) && memcmp(pHeader->String, APF_GLOBAL_REQUEST_STR_UDP_SEND_TO, APF_STR_SIZE_OF(APF_GLOBAL_REQUEST_STR_UDP_SEND_TO)) == 0) { request = 3; }
if (request == 1 || request == 2)
{
int port = 0;
unsigned int len2;
unsigned int bytesRead = len;
unsigned int hsize=0;
if (request==1)
hsize = sizeof(APF_GENERIC_HEADER) + APF_STR_SIZE_OF(APF_GLOBAL_REQUEST_STR_TCP_FORWARD_REQUEST) + sizeof(UINT8);
else if (request==2)
hsize = sizeof(APF_GENERIC_HEADER) + APF_STR_SIZE_OF(APF_GLOBAL_REQUEST_STR_TCP_FORWARD_CANCEL_REQUEST) + sizeof(UINT8);
pCurrent = (unsigned char*)rxBuffer + hsize;
bytesRead -= hsize;
if (bytesRead < sizeof(unsigned int)) {
LME_Deinit(lmemodule);
sem_post(&(module->Lock));
return;
}
len2 = ntohl(*((unsigned int *)pCurrent));
pCurrent += sizeof(unsigned int);
if (bytesRead < (sizeof(unsigned int) + len2 + sizeof(unsigned int))) {
LME_Deinit(lmemodule);
sem_post(&(module->Lock));
return;
}
// addr = (char*)pCurrent;
pCurrent += len2;
port = ntohl(*((unsigned int *)pCurrent));
if (request == 1)
{
//newModule = ILibCreateAsyncServerSocketModule(module->Chain, LMS_MAX_CONNECTIONS, port, 4096, 0, &ILibLMS_OnConnect, &ILibLMS_OnDisconnect, &ILibLMS_OnReceive, NULL, &ILibLMS_OnSendOK);
//if (newModule){
// ILibAsyncServerSocket_SetTag(newModule, module);
// LME_TcpForwardReplySuccess(lmemodule, port);
//}
//else{
// LME_TcpForwardReplyFailure(lmemodule);
//}
// New forwarding request
if (port == 16992 || port == 16993)
LME_TcpForwardReplySuccess(lmemodule, port);
else
LME_TcpForwardReplyFailure(lmemodule);
}
else
{
// Cancel a forwarding request
//list = ILibGetModuleList(module->Chain);
//node = ILibLinkedList_GetNode_Head(list);
//while (node != NULL){
// curModule = (ILibTransport*)ILibLinkedList_GetDataFromNode(node);
// if (curModule->IdentifierFlags == ILibTransports_ILibAsyncServerSocket){
// if (ILibAsyncServerSocket_GetPortNumber(curModule)){
// ILibAsyncServerSocket_Close(curModule);
// }
// }
// node = ILibLinkedList_GetNextNode(node);
//}
LME_TcpForwardCancelReplySuccess(lmemodule);
}
}
else if (request == 3)
{
// Send a UDP packet
// TODO: Send UDP
}
else{
// do nothing
}
}
break;
case APF_CHANNEL_OPEN: // (90) Sent by Intel AMT when a channel needs to be open from Intel AMT. This is not common, but WSMAN events are a good example of channel coming from AMT.
{
APF_GENERIC_HEADER *pHeader = (APF_GENERIC_HEADER *)rxBuffer;
if (pHeader->StringLength == APF_STR_SIZE_OF(APF_OPEN_CHANNEL_REQUEST_DIRECT) && memcmp((char*)pHeader->String, APF_OPEN_CHANNEL_REQUEST_DIRECT, APF_STR_SIZE_OF(APF_OPEN_CHANNEL_REQUEST_DIRECT)) == 0)
{
unsigned int len2;
unsigned char *pCurrent;
struct LMEChannelOpenRequestMessage channelOpenRequest;
if (len < sizeof(APF_GENERIC_HEADER) + ntohl(pHeader->StringLength) + 7 + (5 * sizeof(UINT32))) { LME_Deinit(lmemodule); sem_post(&(module->Lock)); return; }
pCurrent = (unsigned char*)rxBuffer + sizeof(APF_GENERIC_HEADER) + APF_STR_SIZE_OF(APF_OPEN_CHANNEL_REQUEST_DIRECT);
channelOpenRequest.ChannelType = APF_CHANNEL_DIRECT;
channelOpenRequest.SenderChannel = ntohl(*((UINT32 *)pCurrent));
pCurrent += sizeof(UINT32);
channelOpenRequest.InitialWindow = ntohl(*((UINT32 *)pCurrent));
pCurrent += 2 * sizeof(UINT32);
len2 = ntohl(*((UINT32 *)pCurrent));
pCurrent += sizeof(UINT32);
channelOpenRequest.Address = (char*)pCurrent;
pCurrent += len2;
channelOpenRequest.Port = ntohl(*((UINT32 *)pCurrent));
pCurrent += sizeof(UINT32);
LME_ChannelOpenReplyFailure(lmemodule, channelOpenRequest.SenderChannel, OPEN_FAILURE_REASON_CONNECT_FAILED);
}
}
break;
case APF_DISCONNECT: // (1) Intel AMT wants to completely disconnect. Not sure when this happens.
{
// First, we decode the message.
struct LMEDisconnectMessage disconnectMessage;
disconnectMessage.MessageType = APF_DISCONNECT;
disconnectMessage.ReasonCode = ((APF_DISCONNECT_REASON_CODE)ntohl(((APF_DISCONNECT_MESSAGE *)rxBuffer)->ReasonCode));
LMSDEBUG("LME requested to disconnect with reason code 0x%08x\r\n", disconnectMessage.ReasonCode);
LME_Deinit(lmemodule);
}
break;
case APF_SERVICE_REQUEST: // (5)
{
int service = 0;
APF_SERVICE_REQUEST_MESSAGE *pMessage = (APF_SERVICE_REQUEST_MESSAGE *)rxBuffer;
pMessage->ServiceNameLength = ntohl(pMessage->ServiceNameLength);
if (pMessage->ServiceNameLength == 18) {
if (memcmp(pMessage->ServiceName, "pfwd@amt.intel.com", 18) == 0) service = 1;
else if (memcmp(pMessage->ServiceName, "auth@amt.intel.com", 18) == 0) service = 2;
}
if (service > 0)
{
if (service == 1)
{
LME_ServiceAccept(lmemodule, "pfwd@amt.intel.com");
module->pfwdService = LME_STARTED;
}
else if (service == 2)
{
LME_ServiceAccept(lmemodule, "auth@amt.intel.com");
}
} else {
LMSDEBUG("APF_SERVICE_REQUEST - APF_DISCONNECT_SERVICE_NOT_AVAILABLE\r\n");
LME_Disconnect(lmemodule, APF_DISCONNECT_SERVICE_NOT_AVAILABLE);
LME_Deinit(lmemodule);
sem_post(&(module->Lock));
return;
}
}
break;
case APF_CHANNEL_OPEN_CONFIRMATION: // (91) Intel AMT confirmation to an APF_CHANNEL_OPEN request.
{
// First, we decode the message.
struct LMEChannel* channel;
APF_CHANNEL_OPEN_CONFIRMATION_MESSAGE *pMessage = (APF_CHANNEL_OPEN_CONFIRMATION_MESSAGE *)rxBuffer;
struct LMEChannelOpenReplySuccessMessage channelOpenReply;
channelOpenReply.RecipientChannel = ntohl(pMessage->RecipientChannel); // This is the identifier on our side.
channelOpenReply.SenderChannel = ntohl(pMessage->SenderChannel); // This is the identifier on the Intel AMT side.
channelOpenReply.InitialWindow = ntohl(pMessage->InitialWindowSize); // This is the starting window size for flow control.
channel = &(module->Sessions[channelOpenReply.RecipientChannel]); // Get the current session for this message.
if (channel == NULL)
break; // This should never happen.
LMSDEBUG("MEI OPEN OK OUR:%d AMT:%d\r\n", channelOpenReply.RecipientChannel, channelOpenReply.SenderChannel);
if (channel->status == LME_CS_PENDING_CONNECT) // If the channel is in PENDING_CONNECT mode, move the session to connected state.
{
channel->amtid = channelOpenReply.SenderChannel; // We have to set the Intel AMT identifier for this session.
channel->txwindow = channelOpenReply.InitialWindow; // Set the session txwindow.
channel->status = LME_CS_CONNECTED; // Now set the session as CONNECTED.
LMSDEBUG("Channel %d now CONNECTED by AMT %d\r\n", channel->ourid, channel->socketmodule);
if (channel->sockettype == 0) // If the current socket is PAUSED, lets resume it so data can start flowing again.
{
ILibAsyncSocket_Resume(channel->socketmodule); // TCP socket resume
}
}
else if (channel->status == LME_CS_PENDING_LMS_DISCONNECT) // If the channel is in PENDING_DISCONNECT, we have to disconnect the session now. Happens when we disconnect while connection is pending. We don't want to stop a channel during connection, that is bad.
{
channel->amtid = channelOpenReply.SenderChannel; // We have to set the Intel AMT identifier for this session.
LME_ChannelClose(&(module->MeConnection), channel->amtid, channel->ourid); // Send the Intel AMT close. We keep the channel in LME_CS_PENDING_LMS_DISCONNECT state until the close is confirmed.
LMSDEBUG("Channel %d now CONNECTED by AMT %d, but CLOSING it now\r\n", channel->ourid, channel->socketmodule);
}
else
{
// Here, we get an APF_CHANNEL_OPEN in an unexpected state, this should never happen.
LMSDEBUG("Channel %d, unexpected CONNECTED by AMT %d\r\n", channel->ourid, channel->socketmodule);
}
}
break;
case APF_CHANNEL_OPEN_FAILURE: // (92) Intel AMT rejected our connection attempt.
{
// First, we decode the message.
struct LMEChannel* channel;
APF_CHANNEL_OPEN_FAILURE_MESSAGE *pMessage = (APF_CHANNEL_OPEN_FAILURE_MESSAGE *)rxBuffer;
struct LMEChannelOpenReplyFailureMessage channelOpenReply;
channelOpenReply.RecipientChannel = ntohl(pMessage->RecipientChannel); // This is the identifier on our side.
channelOpenReply.ReasonCode = (OPEN_FAILURE_REASON)(ntohl(pMessage->ReasonCode)); // Get the error reason code.
channel = &(module->Sessions[channelOpenReply.RecipientChannel]); // Get the current session for this message.
if (channel == NULL) break; // This should never happen.
LMSDEBUG("**OPEN FAIL OUR:%d ERR:%d\r\n", channelOpenReply.RecipientChannel, channelOpenReply.ReasonCode);
if (channel->errorcount++ >= 0 || channel->status == LME_CS_PENDING_LMS_DISCONNECT)
{
// Fail connection
channel->status = LME_CS_FREE;
LMSDEBUG("Channel %d now FREE by AMT\r\n", channel->ourid);
sem_post(&(module->Lock));
ILibAsyncSocket_Disconnect(channel->socketmodule);
//ILibLMS_LaunchHoldingSessions(module);
return;
}
else
{
// Try again
//ILibLMS_SetupConnection(module, channel->ourid);
}
}
break;
case APF_CHANNEL_CLOSE: // (97) Intel AMT is closing this channel, we need to disconnect the LMS TCP connection
{
// First, we decode the message.
struct LMEChannel* channel;
APF_CHANNEL_CLOSE_MESSAGE *pMessage = (APF_CHANNEL_CLOSE_MESSAGE *)rxBuffer;
struct LMEChannelCloseMessage channelClose;
channelClose.RecipientChannel = ntohl(pMessage->RecipientChannel); // This is the identifier on our side.
channel = &(module->Sessions[channelClose.RecipientChannel]); // Get the current session for this message.
if (channel == NULL) break; // This should never happen.
//LMSDEBUG("CLOSE OUR:%d\r\n", channelClose.RecipientChannel);
if (channel->status == LME_CS_CONNECTED)
{
if (ILibAsyncSocket_IsConnected(channel->socketmodule))
{
channel->status = LME_CS_PENDING_AMT_DISCONNECT;
LMSDEBUG("Channel %d now PENDING_AMT_DISCONNECT by AMT, calling microstack disconnect %d\r\n", channel->ourid, channel->socketmodule);
LME_ChannelClose(lmemodule, channel->amtid, channel->ourid);
sem_post(&(module->Lock));
if (channel->sockettype == 0) // If the current socket is PAUSED, lets resume it so data can start flowing again.
{
ILibAsyncSocket_Disconnect(channel->socketmodule); // TCP socket close
}
sem_wait(&(module->Lock));
channel->status = LME_CS_FREE;
disconnects++;
LMSDEBUG("Channel %d now FREE by AMT\r\n", channel->ourid);
}
else
{
channel->status = LME_CS_FREE;
disconnects++;
LMSDEBUG("Channel %d now FREE by AMT\r\n", channel->ourid);
}
}
else if (channel->status == LME_CS_PENDING_LMS_DISCONNECT)
{
channel->status = LME_CS_FREE;
disconnects++;
LMSDEBUG("Channel %d now FREE by AMT\r\n", channel->ourid);
}
else
{
LMSDEBUG("Channel %d CLOSE, UNEXPECTED STATE %d\r\n", channel->ourid, channel->status);
}
}
break;
case APF_CHANNEL_DATA: // (94) Intel AMT is sending data that we must relay into an LMS TCP connection.
{
//sem_wait(&(module->Lock));
struct LMEChannel* channel;
APF_CHANNEL_DATA_MESSAGE *pMessage = (APF_CHANNEL_DATA_MESSAGE *)rxBuffer;
struct LMEChannelDataMessage channelData;
enum ILibAsyncSocket_SendStatus r;
channelData.MessageType = APF_CHANNEL_DATA;
channelData.RecipientChannel = ntohl(pMessage->RecipientChannel);
channelData.DataLength = ntohl(pMessage->DataLength);
channelData.Data = (unsigned char*)rxBuffer + sizeof(APF_CHANNEL_DATA_MESSAGE);
channel = &(module->Sessions[channelData.RecipientChannel]);
if (channel == NULL || channel->socketmodule == NULL){
sem_post(&(module->Lock));
break;
}
if (channel->sockettype == 0)
{
r = ILibAsyncSocket_Send(channel->socketmodule, (char*)(channelData.Data), channelData.DataLength, ILibAsyncSocket_MemoryOwnership_USER); // TCP socket
}
channel->rxwindow += channelData.DataLength;
if (r == ILibAsyncSocket_ALL_DATA_SENT && channel->rxwindow > 1024) {
LME_ChannelWindowAdjust(lmemodule, channel->amtid, channel->rxwindow); channel->rxwindow = 0;
}
//sem_post(&(module->Lock));
}
break;
case APF_CHANNEL_WINDOW_ADJUST: // 93
{
//sem_wait(&(module->Lock));
struct LMEChannel* channel;
APF_WINDOW_ADJUST_MESSAGE *pMessage = (APF_WINDOW_ADJUST_MESSAGE *)rxBuffer;
struct LMEChannelWindowAdjustMessage channelWindowAdjust;
channelWindowAdjust.MessageType = APF_CHANNEL_WINDOW_ADJUST;
channelWindowAdjust.RecipientChannel = ntohl(pMessage->RecipientChannel);
channelWindowAdjust.BytesToAdd = ntohl(pMessage->BytesToAdd);
channel = &(module->Sessions[channelWindowAdjust.RecipientChannel]);
if (channel == NULL || channel->status == LME_CS_FREE){
sem_post(&(module->Lock));
break;
}
channel->txwindow += channelWindowAdjust.BytesToAdd;
if (channel->sockettype == 0)
{
ILibAsyncSocket_Resume(channel->socketmodule); // TCP socket
}
//sem_post(&(module->Lock));
}
break;
case APF_PROTOCOLVERSION: // 192
{
APF_PROTOCOL_VERSION_MESSAGE *pMessage = (APF_PROTOCOL_VERSION_MESSAGE *)rxBuffer;
struct LMEProtocolVersionMessage protVersion;
protVersion.MajorVersion = ntohl(pMessage->MajorVersion);
protVersion.MinorVersion = ntohl(pMessage->MinorVersion);
protVersion.TriggerReason = (APF_TRIGGER_REASON)ntohl(pMessage->TriggerReason);
switch (module->handshakingStatus)
{
case LME_AGREED:
case LME_NOT_INITIATED:
{
LME_ProtocolVersion(lmemodule, 1, 0, protVersion.TriggerReason);
}
case LME_INITIATED:
if (protVersion.MajorVersion != 1 || protVersion.MinorVersion != 0)
{
LMSDEBUG("LME Version %d.%d is not supported.\r\n", protVersion.MajorVersion, protVersion.MinorVersion);
LME_Disconnect(lmemodule, APF_DISCONNECT_PROTOCOL_VERSION_NOT_SUPPORTED);
LME_Deinit(lmemodule);
sem_post(&(module->Lock));
return;
}
module->AmtProtVersionMajor = protVersion.MajorVersion;
module->AmtProtVersionMinor = protVersion.MinorVersion;
module->handshakingStatus = LME_AGREED;
break;
default:
LME_Disconnect(lmemodule, APF_DISCONNECT_BY_APPLICATION);
LME_Deinit(lmemodule);
break;
}
}
break;
case APF_USERAUTH_REQUEST: // 50
{
// _lme.UserAuthSuccess();
}
break;
default:
// Unknown request.
LMSDEBUG("**Unknown LME command: %d\r\n", ((unsigned char*)rxBuffer)[0]);
LME_Disconnect(lmemodule, APF_DISCONNECT_PROTOCOL_ERROR);
LME_Deinit(lmemodule);
break;
}
sem_post(&(module->Lock));
//if (disconnects > 0) ILibLMS_LaunchHoldingSessions(module); // If disconnects is set to anything, we have free session slots we can fill up.
}
void ILibLMS_OnReceive(ILibAsyncServerSocket_ServerModule AsyncServerSocketModule, ILibAsyncServerSocket_ConnectionToken ConnectionToken, char* buffer, int *p_beginPointer, int endPointer, ILibAsyncServerSocket_OnInterrupt *OnInterrupt, void **user, int *PAUSE)
{
int r, maxread = endPointer;
struct ILibLMS_StateModule* module = (struct ILibLMS_StateModule*)ILibAsyncServerSocket_GetTag(AsyncServerSocketModule);
struct LMEChannel* channel = (struct LMEChannel*)*user;
UNREFERENCED_PARAMETER( AsyncServerSocketModule );
UNREFERENCED_PARAMETER( ConnectionToken );
UNREFERENCED_PARAMETER( OnInterrupt );
UNREFERENCED_PARAMETER( PAUSE );
if (channel == NULL) return;
sem_wait(&(module->Lock));
if (channel->socketmodule != ConnectionToken) { sem_post(&(module->Lock)); ILibAsyncSocket_Disconnect(ConnectionToken); return; }
if (channel->txwindow < endPointer) maxread = channel->txwindow;
if (channel->status != LME_CS_CONNECTED || maxread == 0) { *PAUSE = 1; sem_post(&(module->Lock)); return; }
//printf("%.*s", maxread, buffer);
r = LME_ChannelData(&(module->MeConnection), channel->amtid, maxread, (unsigned char*)buffer);
//LMSDEBUG("ILibLMS_OnReceive, status = %d, txwindow = %d, endPointer = %d, r = %d\r\n", channel->status, channel->txwindow, endPointer, r);
if (r != maxread)
{
//LMSDEBUG("ILibLMS_OnReceive, DISCONNECT %d\r\n", channel->ourid);
sem_post(&(module->Lock));
ILibAsyncSocket_Disconnect(ConnectionToken); // Drop the connection
return;
}
channel->txwindow -= maxread;
*p_beginPointer = maxread;
sem_post(&(module->Lock));
}
void ILibLMS_SetupConnection(struct ILibLMS_StateModule* module, int i)
{
int rport = 0;
char* laddr = NULL;
struct sockaddr_in6 remoteAddress;
if (module->Sessions[i].sockettype == 0)
{
// Fetch the socket remote TCP address
ILibAsyncSocket_GetRemoteInterface(module->Sessions[i].socketmodule, (struct sockaddr*)&remoteAddress);
if (remoteAddress.sin6_family == AF_INET6)
{
laddr = "::1"; // TODO: decode this properly into a string
rport = ntohs(remoteAddress.sin6_port);
}
else
{
laddr = "127.0.0.1"; // TODO: decode this properly into a string
rport = ntohs(((struct sockaddr_in*)(&remoteAddress))->sin_port);
}
}
else
{
// Fetch the socket remote web socket address
laddr = "127.0.0.1"; // TODO: decode this properly into a string
rport = 123; // TODO: decode the remote port
}
// Setup a new LME session
LME_ChannelOpenForwardedRequest(&(module->MeConnection), (unsigned int)i, laddr, module->Sessions[i].localport, laddr, rport);
//LMSDEBUG("ILibLMS_OnReceive, CONNECT %d\r\n", i);
}
int OnConnect = 0;
void ILibLMS_OnConnect(ILibAsyncServerSocket_ServerModule AsyncServerSocketModule, ILibAsyncServerSocket_ConnectionToken ConnectionToken, void **user)
{
OnConnect++;
LMSDEBUG("OnCOnnect:%d", OnConnect);
int i, sessionid = -1, activecount = 0;
struct ILibLMS_StateModule* module = (struct ILibLMS_StateModule*)ILibAsyncServerSocket_GetTag(AsyncServerSocketModule);
sem_wait(&(module->Lock));
// Count the number of active sessions
activecount = LMS_MAX_SESSIONS;
for (i = 0; i < LMS_MAX_SESSIONS; i++) {
if (module->Sessions[i].status == LME_CS_FREE || module->Sessions[i].status == LME_CS_CONNECTION_WAIT) {
activecount--;
}
}
sessionid=GetFreeSlot(module);
// Look for an empty session
//for (i = 1; i < LMS_MAX_SESSIONS; i++) {
// if (module->Sessions[i].status == LME_CS_FREE) {
// sessionid = i;
// break;
// }
//}
if (sessionid == -1)
{
sem_post(&(module->Lock));
LMSDEBUG("ILibLMS_OnConnect NO SESSION SLOTS AVAILABLE\r\n");
ILibAsyncSocket_Disconnect(ConnectionToken); // Drop the connection
return;
}
i = sessionid;
// LMSDEBUG("USING SLOT OUR:%d\r\n", i);
module->Sessions[i].amtid = -1;
module->Sessions[i].ourid = i;
module->Sessions[i].sockettype = 0; // TCP Type
module->Sessions[i].socketmodule = ConnectionToken;
module->Sessions[i].rxwindow = 0;
module->Sessions[i].txwindow = 0;
module->Sessions[i].localport = ILibAsyncServerSocket_GetPortNumber(AsyncServerSocketModule);
module->Sessions[i].errorcount = 0;
*user = &(module->Sessions[i]);
/*
if (activecount >= LMS_MAX_CONNECTIONS)
{
module->Sessions[i].status = LME_CS_CONNECTION_WAIT;
LMSDEBUG("ILibLMS_OnConnect %d (HOLDING)\r\n", i);
}
else
*/
{
module->Sessions[i].status = LME_CS_PENDING_CONNECT;
LMSDEBUG("ILibLMS_OnConnect %d\r\n", i);
ILibLMS_SetupConnection(module, i);
}
sem_post(&(module->Lock));
}
void ILibLMS_OnDisconnect(ILibAsyncServerSocket_ServerModule AsyncServerSocketModule, ILibAsyncServerSocket_ConnectionToken ConnectionToken, void *user)
{
int disconnects = 0;
struct ILibLMS_StateModule* module = (struct ILibLMS_StateModule*)ILibAsyncServerSocket_GetTag(AsyncServerSocketModule);
struct LMEChannel* channel = (struct LMEChannel*)user;
UNREFERENCED_PARAMETER( ConnectionToken );
sem_wait(&(module->Lock));
if (channel == NULL || channel->socketmodule != ConnectionToken)
{
LMSDEBUG("****ILibLMS_OnDisconnect EXIT\r\n");
sem_post(&(module->Lock));
return;
}
LMSDEBUG("ILibLMS_OnDisconnect, Channel %d, %d\r\n", channel->ourid, ConnectionToken);
if (channel->status == LME_CS_CONNECTED)
{
channel->status = LME_CS_PENDING_LMS_DISCONNECT;
if (channel->amtid!=-1 && !LME_ChannelClose(&(module->MeConnection), channel->amtid, channel->ourid))
{
channel->status = LME_CS_FREE;
disconnects++;
LMSDEBUG("Channel %d now FREE by LMS because of failed close\r\n", channel->ourid);
}
else
{
LMSDEBUG("Channel %d now PENDING_LMS_DISCONNECT by LMS\r\n", channel->ourid);
//LMSDEBUG("LME_ChannelClose OK\r\n");
}
}
else if (channel->status == LME_CS_PENDING_CONNECT)
{
channel->status = LME_CS_PENDING_LMS_DISCONNECT;
LMSDEBUG("Channel %d now PENDING_DISCONNECT by LMS\r\n", channel->ourid);
}
else if (channel->status == LME_CS_CONNECTION_WAIT)
{
channel->status = LME_CS_FREE;
disconnects++;
LMSDEBUG("Channel %d now FREE by LMS\r\n", channel->ourid);
}
//LMSDEBUG("ILibLMS_OnDisconnect, DISCONNECT %d, status = %d\r\n", channel->ourid, channel->status);
sem_post(&(module->Lock));
//if (disconnects > 0) ILibLMS_LaunchHoldingSessions(module);
}
void ILibLMS_OnSendOK(ILibAsyncServerSocket_ServerModule AsyncServerSocketModule, ILibAsyncServerSocket_ConnectionToken ConnectionToken, void *user)
{
struct ILibLMS_StateModule* module = (struct ILibLMS_StateModule*)ILibAsyncServerSocket_GetTag(AsyncServerSocketModule);
struct LMEChannel* channel = (struct LMEChannel*)user;
UNREFERENCED_PARAMETER( ConnectionToken );
// Ok to send more on this socket, adjust the window
sem_wait(&(module->Lock));
if (channel->rxwindow != 0)
{
//LMSDEBUG("LME_ChannelWindowAdjust id=%d, rxwindow=%d\r\n", channel->amtid, channel->rxwindow);
LME_ChannelWindowAdjust(&(module->MeConnection), channel->amtid, channel->rxwindow);
channel->rxwindow = 0;
}
sem_post(&(module->Lock));
}
// Private method called when the chain is destroyed, we want to do our cleanup here
void ILibLMS_Destroy(void *object)
{
struct ILibLMS_StateModule* module = (struct ILibLMS_StateModule*)object;
UNREFERENCED_PARAMETER( object );
sem_wait(&(module->Lock));
LME_Disconnect(&(module->MeConnection), APF_DISCONNECT_BY_APPLICATION);
LME_Exit(&(module->MeConnection));
sem_destroy(&(module->Lock));
if (IlibExternLMS == module) { IlibExternLMS = NULL; } // Clear the global reference to the the LMS module.
}
// Create a new Reflector module.
struct ILibLMS_StateModule *ILibLMS_Create(void *Chain)
{
struct ILibLMS_StateModule *module;
// Allocate the new module
module = (struct ILibLMS_StateModule*)malloc(sizeof(struct ILibLMS_StateModule));
if (module == NULL) { ILIBCRITICALEXIT(254); }
memset(module, 0, sizeof(struct ILibLMS_StateModule));
// Setup MEI with LMS interface, if we can't return null
if (LME_Init(&(module->MeConnection), &ILibLMS_MEICallback, module) == 0) {
free(module);
return NULL;
}
// Setup the module
module->ChainLink.DestroyHandler = &ILibLMS_Destroy;
module->ChainLink.ParentChain = Chain;
sem_init(&(module->Lock), 0, 1);
// TCP servers
module->Server1 = ILibCreateAsyncServerSocketModule(Chain, LMS_MAX_CONNECTIONS, 16992, 4096, 0, &ILibLMS_OnConnect, &ILibLMS_OnDisconnect, &ILibLMS_OnReceive, NULL, &ILibLMS_OnSendOK);
if (module->Server1 == NULL) { sem_destroy(&(module->Lock)); free(module); return NULL; }
ILibAsyncServerSocket_SetTag(module->Server1, module);
module->Server2 = ILibCreateAsyncServerSocketModule(Chain, LMS_MAX_CONNECTIONS, 16993, 4096, 0, &ILibLMS_OnConnect, &ILibLMS_OnDisconnect, &ILibLMS_OnReceive, NULL, &ILibLMS_OnSendOK);
if (module->Server2 == NULL) { sem_destroy(&(module->Lock)); free(module->Server1); free(module); return NULL; }
ILibAsyncServerSocket_SetTag(module->Server2, module);
// TODO: US6986 - The meshcommander site should not be served on localhost:16994.
// This code should be commented out - in the future(late 2018) IMC could be put there instead.
// Web Server
//module->WebServer = ILibWebServer_CreateEx(Chain, 8, 16994, 2, &ILibLMS_WebServer_OnSession, module);
IlibExternLMS = module; // Set the global reference to the LMS module.
ILibAddToChain(Chain, module); // Add this module to the chain.
return module;
}
#endif
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