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Multicast.c
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Multicast.c
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/*
Copyright 2001-2018 John Wiseman G8BPQ
This file is part of LinBPQ/BPQ32.
LinBPQ/BPQ32 is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
LinBPQ/BPQ32 is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with LinBPQ/BPQ32. If not, see http://www.gnu.org/licenses
*/
// Mail and Chat Server for BPQ32 Packet Switch
//
// Support for FLAMP compatible Mulitcast
#include "BPQMail.h"
void decodeblock( unsigned char in[4], unsigned char out[3]); // Base64 Decode
time_t MulticastMaxAge = 48 * 60 * 60; // 48 Hours in secs
struct MSESSION * MSessions = NULL;
#ifndef LINBPQ
#include "AFXRES.h"
HWND hMCMonitor = NULL;
HWND MCList;
static HMENU hMCMenu; // handle of menu
static char MCClassName[]="BPQMCWINDOW";
RECT MCMonitorRect;
static int Height, Width, LastY;
#define BGCOLOUR RGB(236,233,216)
void MCMoveWindows()
{
RECT rcClient;
int ClientWidth, ClientHeight;
GetClientRect(hMCMonitor, &rcClient);
if (rcClient.bottom == 0) // Minimised
return;
ClientHeight = rcClient.bottom;
ClientWidth = rcClient.right;
MoveWindow(MCList, 0, 0, rcClient.right, rcClient.bottom, TRUE);
}
void CopyMCToClipboard(HWND hWnd);
LRESULT CALLBACK MCWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
int wmId, wmEvent;
LPRECT lprc;
struct MSESSION * Sess = MSessions;
struct MSESSION * Temp;
switch (message)
{
case WM_ACTIVATE:
break;
case WM_CLOSE:
if (wParam) // Used by Close All Programs.
return 0;
return (DefWindowProc(hWnd, message, wParam, lParam));
case WM_COMMAND:
wmId = LOWORD(wParam); // Remember, these are...
wmEvent = HIWORD(wParam); // ...different for Win32!
switch (wmId)
{
case ID_EDIT_COPY:
CopyMCToClipboard(hMCMonitor);
return 0;;
case ID_EDIT_CLEAR:
while (Sess)
{
ListView_DeleteItem(MCList, Sess->Index);
if (Sess->FileName)
free(Sess->FileName);
if (Sess->OrigTimeStamp)
free(Sess->OrigTimeStamp);
if (Sess->Message)
free(Sess->Message);
if (Sess->BlockList)
free(Sess->BlockList);
if (Sess->ID)
free(Sess->ID);
Temp = Sess;
Sess = Sess->Next;
}
MSessions = NULL;
return 0;
default:
return 0;
}
case WM_SYSCOMMAND:
wmId = LOWORD(wParam); // Remember, these are...
wmEvent = HIWORD(wParam); // ...different for Win32!
switch (wmId) {
case SC_MINIMIZE:
if (cfgMinToTray)
return ShowWindow(hWnd, SW_HIDE);
default:
return (DefWindowProc(hWnd, message, wParam, lParam));
}
case WM_SIZING:
lprc = (LPRECT) lParam;
Height = lprc->bottom-lprc->top;
Width = lprc->right-lprc->left;
MCMoveWindows();
return TRUE;
case WM_DESTROY:
// Remove the subclass from the edit control.
GetWindowRect(hWnd, &MonitorRect); // For save soutine
if (cfgMinToTray)
DeleteTrayMenuItem(hWnd);
hMCMonitor = NULL;
break;
default:
return (DefWindowProc(hWnd, message, wParam, lParam));
}
return (0);
}
static void MoveMCWindows()
{
RECT rcMain, rcClient;
int ClientHeight, ClientWidth;
GetWindowRect(hMCMonitor, &rcMain);
GetClientRect(hMCMonitor, &rcClient);
ClientHeight = rcClient.bottom;
ClientWidth = rcClient.right;
// MoveWindow(hwndMon,2, 0, ClientWidth-4, SplitPos, TRUE);
// MoveWindow(hwndOutput,2, 2, ClientWidth-4, ClientHeight-4, TRUE);
// MoveWindow(hwndSplit,0, SplitPos, ClientWidth, SplitBarHeight, TRUE);
}
HWND CreateMCListView (HWND hwndParent)
{
INITCOMMONCONTROLSEX icex; // Structure for control initialization.
HWND hList;
LV_COLUMN Column;
LOGFONT lf;
HFONT hFont;
int n = 0;
memset(&lf, 0, sizeof(LOGFONT));
lf.lfHeight = 12;
lf.lfWidth = 8;
lf.lfPitchAndFamily = FIXED_PITCH;
strcpy (lf.lfFaceName, "FIXEDSYS");
hFont = CreateFontIndirect(&lf);
icex.dwICC = ICC_LISTVIEW_CLASSES;
InitCommonControlsEx(&icex);
// Create the list-view window in report view with label editing enabled.
hList = CreateWindow(WC_LISTVIEW,
"Messages",
WS_CHILD | LVS_REPORT | LVS_EDITLABELS,
0, 0, 100, 100,
hwndParent,
(HMENU)NULL,
hInst,
NULL);
SendMessage(hList, WM_SETFONT,(WPARAM) hFont, 0);
ListView_SetExtendedListViewStyle(hList,LVS_EX_FULLROWSELECT);
Column.cx=45;
Column.mask=LVCF_WIDTH | LVCF_TEXT;
Column.pszText="ID";
SendMessage(hList, LVM_INSERTCOLUMN, n++, (LPARAM)&Column);
Column.cx=95;
Column.mask=LVCF_WIDTH | LVCF_TEXT;
Column.pszText="From";
SendMessage(hList, LVM_INSERTCOLUMN, n++, (LPARAM)&Column);
Column.cx=140;
Column.mask=LVCF_WIDTH | LVCF_TEXT;
Column.pszText="FileName";
SendMessage(hList, LVM_INSERTCOLUMN, n++, (LPARAM)&Column);
Column.cx=50;
Column.mask=LVCF_WIDTH | LVCF_TEXT;
Column.pszText="Size";
SendMessage(hList, LVM_INSERTCOLUMN, n++, (LPARAM)&Column);
Column.cx=40;
Column.mask=LVCF_WIDTH | LVCF_TEXT;
Column.pszText="%";
SendMessage(hList, LVM_INSERTCOLUMN, n++, (LPARAM)&Column);
Column.cx=55;
Column.mask=LVCF_WIDTH | LVCF_TEXT;
Column.pszText="Time";
SendMessage(hList, LVM_INSERTCOLUMN, n++, (LPARAM)&Column);
Column.cx=55;
Column.mask=LVCF_WIDTH | LVCF_TEXT;
Column.pszText="Age";
SendMessage(hList, LVM_INSERTCOLUMN, n++, (LPARAM)&Column);
Column.cx=20;
Column.mask=LVCF_WIDTH | LVCF_TEXT;
Column.pszText="C";
SendMessage(hList, LVM_INSERTCOLUMN, n++, (LPARAM)&Column);
Column.cx=430;
Column.mask=LVCF_WIDTH | LVCF_TEXT;
Column.pszText="BlockList";
SendMessage(hList, LVM_INSERTCOLUMN, n++, (LPARAM) &Column);
ShowWindow(hList, SW_SHOWNORMAL);
UpdateWindow(hList);
return (hList);
}
#define OurSetItemText(hwndLV, i, iSubItem_, pszText_) \
{ LV_ITEM _ms_lvi;\
_ms_lvi.iSubItem = iSubItem_;\
_ms_lvi.pszText = pszText_;\
SNDMSG((hwndLV), LVM_SETITEMTEXT, (WPARAM)i, (LPARAM)(LV_ITEM FAR *)&_ms_lvi);\
}
void RefreshMCLine(struct MSESSION * MSession)
{
LV_ITEM Item;
LVFINDINFO Finfo;
int ret, n, pcent;
char Time[80];
char Agestring[80];
char Size[16] = "??";
char Percent[16] = "??";
char Key[16];
char BlockList[101] = "";
struct tm * TM;
time_t Age;
if (MCList == 0)
return;
sprintf(Key, "%04X", MSession->Key);
Age = time(NULL) - MSession->LastUpdated;
// if (LocalTime)
// TM = localtime(&MSession->LastUpdated);
// else
TM = gmtime(&Age);
wsprintf(Agestring, "%.2d:%.2d",
TM->tm_hour, TM->tm_min);
TM = gmtime(&MSession->Created);
wsprintf(Time, "%.2d:%.2d",
TM->tm_hour, TM->tm_min);
Finfo.flags = LVFI_STRING;
Finfo.psz = Key;
Finfo.vkDirection = VK_DOWN;
ret = SendMessage(MCList, LVM_FINDITEM, (WPARAM)-1, (LPARAM) &Finfo);
if (ret == -1)
{
n = ListView_GetItemCount(MCList);
MSession->Index = n;
}
else
MSession->Index = ret;
Item.mask=LVIF_TEXT;
Item.iItem = MSession->Index;
Item.iSubItem = 0;
Item.pszText = Key;
ret = SendMessage(MCList, LVM_SETITEMTEXT, (WPARAM)MSession->Index, (LPARAM) &Item);
if (ret == 0)
MSession->Index = ListView_InsertItem(MCList, &Item);
sprintf(Size, "%d", MSession->MessageLen);
if (MSession->MessageLen)
{
int i;
pcent = (MSession->BlocksReceived * 100) / MSession->BlockCount;
sprintf(Percent, "%d", pcent);
// Flag received blocks. Normalise to 50 wide
memset(BlockList, '.', 50);
for (i = 0; i < 50; i++)
{
int posn = (i * MSession->BlockCount) / 50;
if (MSession->BlockList[posn] == 1)
BlockList[i] = 'Y';
}
}
n = 0;
OurSetItemText(MCList, MSession->Index, n++, Key);
if (MSession->ID)
OurSetItemText(MCList, MSession->Index, n++, MSession->ID)
else
OurSetItemText(MCList, MSession->Index, n++, " ");
OurSetItemText(MCList, MSession->Index, n++, MSession->FileName);
OurSetItemText(MCList, MSession->Index, n++, Size);
OurSetItemText(MCList, MSession->Index, n++, Percent);
OurSetItemText(MCList, MSession->Index, n++, Time);
OurSetItemText(MCList, MSession->Index, n++, Agestring);
if (MSession->Completed)
OurSetItemText(MCList, MSession->Index, n++, "Y")
else
OurSetItemText(MCList, MSession->Index, n++, " ");
OurSetItemText(MCList, MSession->Index, n++, BlockList);
}
BOOL CreateMulticastConsole()
{
WNDCLASS wc;
HBRUSH bgBrush;
RECT rcClient;
if (hMCMonitor)
{
ShowWindow(hMCMonitor, SW_SHOWNORMAL);
SetForegroundWindow(hMCMonitor);
return FALSE; // Already open
}
bgBrush = CreateSolidBrush(BGCOLOUR);
wc.style = CS_HREDRAW | CS_VREDRAW;
wc.lpfnWndProc = MCWndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = DLGWINDOWEXTRA;
wc.hInstance = hInst;
wc.hIcon = LoadIcon( hInst, MAKEINTRESOURCE(BPQICON) );
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = bgBrush;
wc.lpszMenuName = NULL;
wc.lpszClassName = MCClassName;
RegisterClass(&wc);
hMCMonitor=CreateDialog(hInst, MCClassName, 0, NULL);
if (!hMCMonitor)
return (FALSE);
hMCMenu=GetMenu(hMCMonitor);
// CheckMenuItem(hMenu,MONBBS, MonBBS ? MF_CHECKED : MF_UNCHECKED);
// CheckMenuItem(hMenu,MONCHAT, MonCHAT ? MF_CHECKED : MF_UNCHECKED);
// CheckMenuItem(hMenu,MONTCP, MonTCP ? MF_CHECKED : MF_UNCHECKED);
DrawMenuBar(hMCMonitor);
// Create List View
GetClientRect (hMCMonitor, &rcClient);
MCList = CreateMCListView(hMCMonitor);
MoveWindow(MCList, 0, 0, rcClient.right, rcClient.bottom, TRUE);
if (cfgMinToTray)
AddTrayMenuItem(hMCMonitor, "Mail Multicast Monitor");
ShowWindow(hMCMonitor, SW_SHOWNORMAL);
if (MCMonitorRect.right < 100 || MCMonitorRect.bottom < 100)
{
GetWindowRect(hMCMonitor, &MCMonitorRect);
}
MoveWindow(hMCMonitor, MCMonitorRect.left, MCMonitorRect.top,
MCMonitorRect.right-MCMonitorRect.left, MCMonitorRect.bottom-MCMonitorRect.top, TRUE);
MoveMCWindows();
return TRUE;
}
void CopyMCToClipboard(HWND hWnd)
{
int i,n, len=0;
char * Buffer;
HGLOBAL hMem;
char * ptr;
char Time[80];
char Agestring[80];
char From[16];
char Size[16];
char Percent[16];
char FileName[128];
char Key[16];
char Complete[2];
char BlockList[128];
n = ListView_GetItemCount(MCList);
Buffer = malloc((n + 1) * 200);
len = sprintf(Buffer, "ID From FileName Size %% Time Age Blocklist\r\n");
for (i=0; i<n; i++)
{
// Get Items
ListView_GetItemText(MCList, i, 0, Key, 8);
ListView_GetItemText(MCList, i, 1, From, 15);
ListView_GetItemText(MCList, i, 2, FileName, 128);
ListView_GetItemText(MCList, i, 3, Size, 16);
ListView_GetItemText(MCList, i, 4, Percent, 16);
ListView_GetItemText(MCList, i, 5, Time, 80);
ListView_GetItemText(MCList, i, 6, Agestring, 80);
ListView_GetItemText(MCList, i, 7, Complete, 2);
ListView_GetItemText(MCList, i, 8, BlockList, 100);
// Add line to buffer
len += sprintf(&Buffer[len], "%4s %-10s %-16s %5s%4s %-6s%-6s%-2s%50s\r\n",
Key, From, FileName, Size, Percent, Time, Agestring, Complete, BlockList);
}
hMem=GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE, len+1);
if (hMem != 0)
{
ptr = GlobalLock(hMem);
if (OpenClipboard(MainWnd))
{
strcpy(ptr, Buffer);
GlobalUnlock(hMem);
EmptyClipboard();
SetClipboardData(CF_TEXT,hMem);
CloseClipboard();
}
else
GlobalFree(hMem);
}
free(Buffer);
}
#else
// LinBPQ
void RefreshMCLine(struct MSESSION * MSession)
{
}
#endif
static unsigned int crcval = 0xFFFF;
static void update(char c)
{
int i;
crcval ^= c & 255;
for (i = 0; i < 8; ++i)
{
if (crcval & 1)
crcval = (crcval >> 1) ^ 0xA001;
else
crcval = (crcval >> 1);
}
}
static unsigned int CalcCRC(UCHAR * ptr, int Len)
{
int i;
crcval = 0xFFFF;
for (i = 0; i < Len; i++)
{
update(*ptr++);
}
return crcval;
}
struct MSESSION * FindMSession(unsigned int Key)
{
struct MSESSION * Sess = MSessions;
struct MSESSION * LastSess = NULL;
while (Sess)
{
if (Sess->Key == Key)
return Sess;
LastSess = Sess;
Sess = Sess->Next;
}
// Not found
Sess = zalloc(sizeof(struct MSESSION));
if (Sess == NULL)
return NULL;
Sess->Key = Key;
Sess->Created = time(NULL);
if (LastSess)
LastSess->Next = Sess;
else
MSessions = Sess;
return Sess;
}
#include "LzmaLib.h"
#define LZMA_STR "\1LZMA"
UCHAR * LZUncompress(UCHAR * Decoded, int Len, int * NewLen)
{
unsigned char * buf;
unsigned char inprops[LZMA_PROPS_SIZE];
size_t inlen;
int r;
UINT rlen;
UINT outlen;
memcpy(&rlen, &Decoded[5], 4);
outlen = ntohl(rlen);
*NewLen = outlen;
buf = malloc(outlen);
if (outlen > 1 << 25)
{
Debugprintf("Refusing to decompress data (> 32 MiB)");
return NULL;
}
memcpy(inprops, Decoded + strlen(LZMA_STR) + sizeof(int), LZMA_PROPS_SIZE);
inlen = Len - strlen(LZMA_STR) - sizeof(int) - LZMA_PROPS_SIZE;
if ((r = LzmaUncompress(buf, &outlen, (const unsigned char*)Decoded + Len - inlen, &inlen,
inprops, LZMA_PROPS_SIZE)) != SZ_OK)
{
Debugprintf("Lzma Uncompress failed: %s", LZMA_ERRORS[r]);
return NULL;
}
else
{
return buf;
}
}
void decodeblock128(unsigned char in[8], unsigned char out[7] )
{
out[0] = (unsigned char) (in[0] << 1 | in[1] >> 6);
out[1] = (unsigned char) (in[1] << 2 | in[2] >> 5);
out[2] = (unsigned char) (in[2] << 3 | in[3] >> 4);
out[3] = (unsigned char) (in[3] << 4 | in[4] >> 3);
out[4] = (unsigned char) in[4] << 5 | in[5] >> 2;
out[5] = (unsigned char) in[5] << 6 | in[6] >> 1;
out[6] = (unsigned char) in[6] << 7 | in[7];
}
void SaveMulticastMessage(struct MSESSION * MSession)
{
UCHAR * Decoded = NULL; // Output from Basexxx decode
UCHAR * Uncompressed = NULL;
int DecodedLen; // Length of decoded message
int UncompressedLen; // Length of decompressed message
int ExpectedLen; // From front of Base128 or Base256 message
int HddrLen; // Length of Expected Len Header
if (MSession->FileName == NULL)
return; // Need Name
MSession->Completed = TRUE; // So we don't get it again
// If compresses and encoded, decode and decompress
if (memcmp(MSession->Message, "[b64:start]", 11) == 0)
{
UCHAR * ptr1 = &MSession->Message[11];
UCHAR * ptr2 = malloc(MSession->MessageLen); // Must get smaller
int Len = MSession->MessageLen - 21; // Header and Trailer
Decoded = ptr2;
// Decode Base64 encoding
while (Len > 0)
{
decodeblock(ptr1, ptr2);
ptr1 += 4;
ptr2 += 3;
Len -= 4;
}
DecodedLen = ptr2 - Decoded;
Uncompressed = LZUncompress(Decoded, DecodedLen, &UncompressedLen);
}
else if (memcmp(MSession->Message, "[b128:start]", 12) == 0)
{
UCHAR * ptr1 = &MSession->Message[12];
UCHAR * ptr2 = malloc(MSession->MessageLen); // Must get smaller
UCHAR ch;
UCHAR * Intermed;
int Len = MSession->MessageLen - 23; // Header and Trailer
Intermed = ptr2;
// Decode Base128 encoding
// First remove transparency (as in base256)
// Extract decoded msg len
ExpectedLen = atoi(ptr1);
ptr1 = strchr(ptr1, 10);
ptr1++;
HddrLen = ptr1 - &MSession->Message[12];
if (ExpectedLen == 0 || ExpectedLen > Len || ptr1 == (UCHAR *)1)
{
Debugprintf("MCAST Missing Length Field");
return;
}
Len -= HddrLen;;
while (Len > 0)
{
ch = *(ptr1++);
Len --;
if (ch == ':')
{
ch = *(ptr1++);
Len--;
switch (ch)
{
case ':' : *(ptr2++) = ':'; break;
case '0' : *(ptr2++) = 0x00; break;
case '1' : *(ptr2++) = 0x01; break;
case '2' : *(ptr2++) = 0x02; break;
case '3' : *(ptr2++) = 0x03; break;
case '4' : *(ptr2++) = 0x04; break;
case '5' : *(ptr2++) = 0x05; break;
case '6' : *(ptr2++) = 0x06; break;
case '7' : *(ptr2++) = 0x07; break;
case '8' : *(ptr2++) = 0x08; break;
case '9' : *(ptr2++) = 0x09; break;
case 'A' : *(ptr2++) = '\n'; break;
case 'B' : *(ptr2++) = '\r'; break;
case 'C' : *(ptr2++) = '^'; break;
case 'D' : *(ptr2++) = 0x7F; break;
case 'E' : *(ptr2++) = 0xFF; break;
}
}
else
*(ptr2++) = ch;
}
Len = ptr2 - Intermed;
ptr1 = Intermed;
ptr2 = malloc(MSession->MessageLen); // Must get smaller
Decoded = ptr2;
while (Len > 0)
{
decodeblock128(ptr1, ptr2);
ptr1 += 8;
ptr2 += 7;
Len -= 8;
}
DecodedLen = ptr2 - Decoded;
Uncompressed = LZUncompress(Decoded, DecodedLen, &UncompressedLen);
}
else if (memcmp(MSession->Message, "[b256:start]", 12) == 0)
{
UCHAR * ptr1 = &MSession->Message[12];
UCHAR * ptr2 = malloc(MSession->MessageLen); // Must get smaller
UCHAR ch;
int Len = MSession->MessageLen - 23; // Header and Trailer
Decoded = ptr2;
// Decode Base256 encoding
// Extract decoded msg len
ExpectedLen = atoi(ptr1);
ptr1 = strchr(ptr1, 10);
ptr1++;
HddrLen = ptr1 - &MSession->Message[12];
if (ExpectedLen == 0 || ExpectedLen > Len || ptr1 == (UCHAR *)1)
{
Debugprintf("MCAST Missing Length Field");
return;
}
Len -= HddrLen;;
while (Len > 0)
{
ch = *(ptr1++);
Len --;
if (ch == ':')
{
ch = *(ptr1++);
Len--;
switch (ch)
{
case ':' : *(ptr2++) = ':'; break;
case '0' : *(ptr2++) = 0x00; break;
case '1' : *(ptr2++) = 0x01; break;
case '2' : *(ptr2++) = 0x02; break;
case '3' : *(ptr2++) = 0x03; break;
case '4' : *(ptr2++) = 0x04; break;
case '5' : *(ptr2++) = 0x05; break;
case '6' : *(ptr2++) = 0x06; break;
case '7' : *(ptr2++) = 0x07; break;
case '8' : *(ptr2++) = 0x08; break;
case '9' : *(ptr2++) = 0x09; break;
case 'A' : *(ptr2++) = '\n'; break;
case 'B' : *(ptr2++) = '\r'; break;
case 'C' : *(ptr2++) = '^'; break;
case 'D' : *(ptr2++) = 0x7F; break;
case 'E' : *(ptr2++) = 0xFF; break;
}
}
else
*(ptr2++) = ch;
}
DecodedLen = ptr2 - Decoded;
Uncompressed = LZUncompress(Decoded, DecodedLen, &UncompressedLen);
}
else
{
// Plain Text
UncompressedLen = MSession->MessageLen;
Uncompressed = MSession->Message;
MSession->Message = NULL; // So we dont try to free again
}
if (Decoded)
free(Decoded);
if (Uncompressed)
{
// Write it away and free it
char MsgFile[MAX_PATH];
FILE * hFile;
int WriteLen=0;
UCHAR * ptr1 = Uncompressed;
// Make Sure MCAST directory exists
sprintf_s(MsgFile, sizeof(MsgFile), "%s/MCAST", MailDir);
#ifdef WIN32
CreateDirectory(MsgFile, NULL); // Just in case
#else
mkdir(MsgFile, S_IRWXU | S_IRWXG | S_IRWXO);
chmod(MsgFile, S_IRWXU | S_IRWXG | S_IRWXO);
#endif
sprintf_s(MsgFile, sizeof(MsgFile), "%s/MCAST/%s", MailDir, MSession->FileName);
hFile = fopen(MsgFile, "wb");
if (hFile)
{
WriteLen = fwrite(Uncompressed, 1, UncompressedLen, hFile);
fclose(hFile);
}
// if it looks like an export file (Starts SP SB or ST) and ends /ex
// import and delete it.
if (*(ptr1) == 'S' && ptr1[2] == ' ')
if (_memicmp(&ptr1[UncompressedLen - 5], "/EX", 3) == 0)
ImportMessages(NULL, MsgFile, TRUE);
free (Uncompressed);
}
}
VOID ProcessMCASTLine(ConnectionInfo * conn, struct UserInfo * user, char * Buffer, int MsgLen)
{
char Opcode[80];
unsigned int checksum, len = 0;
char * data;
int headerlen = 0;
unsigned int crcval;
int n;
unsigned int Key;
struct MSESSION * MSession;
if (MsgLen == 1 && Buffer[0] == 13)
return;
MsgLen --; // Remove the CR we added
Buffer[MsgLen] = 0;
if (MsgLen == 1 && Buffer[0] == 13)
return;
// return;
n = sscanf(&Buffer[1], "%s %04d %04X", Opcode, &len, &checksum);
if (n != 3)
return;
data = strchr(Buffer, '>');
if (data)
headerlen = ++data - Buffer;
if (headerlen + len != MsgLen)
return;
crcval = CalcCRC(data, len);
if (checksum != crcval)
return;
// Extract Session Key
sscanf(&data[1], "%04X", &Key);
MSession = FindMSession(Key);
if (MSession == 0)
return; // ?? couldn't allocate
MSession->LastUpdated = time(NULL);
if (MSession->Completed)
return; // We already have it all
if (strcmp(Opcode, "ID") == 0)
{
strlop(&data[6], ' ');
MSession->ID = _strdup(&data[6]);
return;
}
if (strcmp(Opcode, "PROG") == 0)
{
// Ignore for now
return;
}
if (strcmp(Opcode, "FILE") == 0)
{
// <FILE 34 2A1A>{80BC}20141108142542:debug_log.txt
char * FN = strchr(&data[6], ':');
if (FN)
{
*(FN++) = 0;
MSession->FileName = _strdup(FN);
MSession->OrigTimeStamp = _strdup(&data[6]);
}
// We could get whole message without getting the Name,
// so check
if (MSession->BlockCount && MSession->BlocksReceived == MSession->BlockCount)
{
// We have the whole message. Decode and Save