diff options
| -rw-r--r-- | debian/patches-pending-evaluation/401_nxcomp_bigrequests-and-genericevent-extensions.full+lite.patch | 1870 |
1 files changed, 1870 insertions, 0 deletions
diff --git a/debian/patches-pending-evaluation/401_nxcomp_bigrequests-and-genericevent-extensions.full+lite.patch b/debian/patches-pending-evaluation/401_nxcomp_bigrequests-and-genericevent-extensions.full+lite.patch new file mode 100644 index 000000000..ab16864df --- /dev/null +++ b/debian/patches-pending-evaluation/401_nxcomp_bigrequests-and-genericevent-extensions.full+lite.patch @@ -0,0 +1,1870 @@ +--- a/nxcomp/ClientChannel.cpp ++++ b/nxcomp/ClientChannel.cpp +@@ -447,6 +447,26 @@ + } + } + ++ // Get other bits of the header, so will not need to refer to them again ++ unsigned char inputDataByte = inputMessage[1]; ++ unsigned int buffer2 = GetUINT(inputMessage + 2, bigEndian_); ++ unsigned int inputDataSize = buffer2 - 1; ++ if (buffer2 == 0) ++ { ++ // BIG-REQUESTS ++ inputMessage += 4; ++ inputLength -= 4; ++ inputDataSize = GetULONG(inputMessage, bigEndian_) - 2; ++ } ++ if (inputLength != (4 * (inputDataSize + 1))) ++ { ++ #ifdef WARNING ++ *logofs << "handleRead: inputLength=" << inputLength ++ << " mismatch inputDataSize=" << inputDataSize ++ << ".\n" << logofs_flush; ++ #endif ++ } ++ + // + // Go to the message's specific encoding. + // +@@ -455,6 +475,11 @@ + { + case X_AllocColor: + { ++ #ifdef WARNING ++ if (inputLength < 14) ++ *logofs << "handleRead: X_AllocColor inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + encodeBuffer.encodeCachedValue(GetULONG(inputMessage + 4, bigEndian_), 29, + clientCache_ -> colormapCache); + const unsigned char *nextSrc = inputMessage + 8; +@@ -476,6 +501,11 @@ + break; + case X_ReparentWindow: + { ++ #ifdef WARNING ++ if (inputLength < 16) ++ *logofs << "handleRead: X_ReparentWindow inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + encodeBuffer.encodeXidValue(GetULONG(inputMessage + 4, bigEndian_), + clientCache_ -> windowCache); + encodeBuffer.encodeXidValue(GetULONG(inputMessage + 8, bigEndian_), +@@ -486,6 +516,11 @@ + break; + case X_ChangeProperty: + { ++ #ifdef WARNING ++ if (inputLength < 24) ++ *logofs << "handleRead: X_ChangeProperty inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + MessageStore *messageStore = clientStore_ -> + getRequestStore(X_ChangeProperty); + +@@ -501,8 +536,36 @@ + encodeBuffer.encodeCachedValue(format, 8, + clientCache_ -> changePropertyFormatCache); + unsigned int dataLength = GetULONG(inputMessage + 20, bigEndian_); ++ ++ // Self-preserving sanity check (otherwise we crash and dump core): ++ // some clients do this when not getting their beloved BIG-REQUESTS. ++ unsigned int maxLength = 0; ++ if (format == 8) ++ { ++ maxLength = inputLength - 24; ++ } ++ else if (format == 32) ++ { ++ maxLength = (inputLength - 24) >> 2; ++ } ++ else if (format == 16) ++ { ++ maxLength = (inputLength - 24) >> 1; ++ } ++ if (dataLength > maxLength) ++ { ++ #ifdef WARNING ++ *logofs << "handleRead X_ChangeProperty bogus dataLength=" << dataLength ++ << " set to " << maxLength ++ << " when format=" << (int)format ++ << " inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif ++ dataLength = maxLength; ++ } ++ + encodeBuffer.encodeValue(dataLength, 32, 6); +- encodeBuffer.encodeValue(inputMessage[1], 2); ++ encodeBuffer.encodeValue(inputDataByte, 2); + encodeBuffer.encodeXidValue(GetULONG(inputMessage + 4, bigEndian_), + clientCache_ -> windowCache); + encodeBuffer.encodeCachedValue(GetULONG(inputMessage + 8, bigEndian_), 29, +@@ -533,7 +596,7 @@ + nextSrc += 4; + } + } +- else ++ else if (format == 16) + { + for (unsigned int i = 0; i < dataLength; i++) + { +@@ -541,6 +604,13 @@ + nextSrc += 2; + } + } ++ else ++ { ++ #ifdef WARNING ++ *logofs << "ChangeProperty bogus format=" << (int)format ++ << ".\n" << logofs_flush; ++ #endif ++ } + } + break; + case X_SendEvent: +@@ -551,6 +621,11 @@ + // ratio. + // + ++ #ifdef WARNING ++ if (inputLength < 44) ++ *logofs << "handleRead: X_SendEvent inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + MessageStore *messageStore = clientStore_ -> + getRequestStore(X_SendEvent); + +@@ -562,7 +637,7 @@ + break; + } + +- encodeBuffer.encodeBoolValue((unsigned int) inputMessage[1]); ++ encodeBuffer.encodeBoolValue((unsigned int) inputDataByte); + unsigned int window = GetULONG(inputMessage + 4, bigEndian_); + + if (window == 0 || window == 1) +@@ -599,7 +674,12 @@ + break; + case X_ChangeWindowAttributes: + { +- encodeBuffer.encodeValue((inputLength - 12) >> 2, 4); ++ #ifdef WARNING ++ if (inputLength < 16) ++ *logofs << "handleRead: X_ChangeWindowAttributes inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif ++ encodeBuffer.encodeValue(inputDataSize - 2, 4); + encodeBuffer.encodeXidValue(GetULONG(inputMessage + 4, bigEndian_), + clientCache_ -> windowCache); + unsigned int bitmask = GetULONG(inputMessage + 8, bigEndian_); +@@ -621,6 +701,11 @@ + break; + case X_ClearArea: + { ++ #ifdef WARNING ++ if (inputLength < 16) ++ *logofs << "handleRead: X_ClearArea inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + #ifdef TARGETS + + unsigned int t_id = GetULONG(inputMessage + 4, bigEndian_); +@@ -654,7 +739,7 @@ + break; + } + +- encodeBuffer.encodeBoolValue((unsigned int) inputMessage[1]); ++ encodeBuffer.encodeBoolValue((unsigned int) inputDataByte); + encodeBuffer.encodeXidValue(GetULONG(inputMessage + 4, bigEndian_), + clientCache_ -> windowCache); + const unsigned char *nextSrc = inputMessage + 8; +@@ -668,6 +753,11 @@ + break; + case X_CloseFont: + { ++ #ifdef WARNING ++ if (inputLength < 8) ++ *logofs << "handleRead: X_CloseFont inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + unsigned int font = GetULONG(inputMessage + 4, bigEndian_); + encodeBuffer.encodeValue(font - clientCache_ -> lastFont, 29, 5); + clientCache_ -> lastFont = font; +@@ -675,6 +765,11 @@ + break; + case X_ConfigureWindow: + { ++ #ifdef WARNING ++ if (inputLength < 12) ++ *logofs << "handleRead: X_ConfigureWindow inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + MessageStore *messageStore = clientStore_ -> + getRequestStore(X_ConfigureWindow); + +@@ -708,6 +803,11 @@ + break; + case X_ConvertSelection: + { ++ #ifdef WARNING ++ if (inputLength < 24) ++ *logofs << "handleRead: X_ConvertSelection inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + encodeBuffer.encodeCachedValue(GetULONG(inputMessage + 4, bigEndian_), 29, + clientCache_ -> convertSelectionRequestorCache, 9); + const unsigned char* nextSrc = inputMessage + 8; +@@ -725,6 +825,11 @@ + break; + case X_CopyArea: + { ++ #ifdef WARNING ++ if (inputLength < 28) ++ *logofs << "handleRead: X_CopyArea inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + #ifdef TARGETS + + unsigned int t_id = GetULONG(inputMessage + 4, bigEndian_); +@@ -793,6 +898,11 @@ + break; + case X_CopyGC: + { ++ #ifdef WARNING ++ if (inputLength < 16) ++ *logofs << "handleRead: X_CopyGC inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + #ifdef TARGETS + + unsigned int s_g_id = GetULONG(inputMessage + 4, bigEndian_); +@@ -814,6 +924,11 @@ + break; + case X_CopyPlane: + { ++ #ifdef WARNING ++ if (inputLength < 32) ++ *logofs << "handleRead: X_CopyPlane inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + encodeBuffer.encodeXidValue(GetULONG(inputMessage + 4, + bigEndian_), clientCache_ -> drawableCache); + encodeBuffer.encodeXidValue(GetULONG(inputMessage + 8, +@@ -833,6 +948,11 @@ + break; + case X_CreateGC: + { ++ #ifdef WARNING ++ if (inputLength < 16) ++ *logofs << "handleRead: X_CreateGC inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + #ifdef TARGETS + + unsigned int g_id = GetULONG(inputMessage + 4, bigEndian_); +@@ -917,6 +1037,11 @@ + break; + case X_ChangeGC: + { ++ #ifdef WARNING ++ if (inputLength < 16) ++ *logofs << "handleRead: X_ChangeGC inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + #ifdef TARGETS + + unsigned int g_id = GetULONG(inputMessage + 4, bigEndian_); +@@ -998,14 +1123,19 @@ + break; + case X_CreatePixmap: + { ++ #ifdef WARNING ++ if (inputLength < 16) ++ *logofs << "handleRead: X_CreatePixmap inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + #ifdef TARGETS + +- *logofs << "handleRead: X_CreatePixmap depth " << (unsigned) inputMessage[1] ++ *logofs << "handleRead: X_CreatePixmap depth " << (unsigned) inputDataByte + << ", pixmap id " << GetULONG(inputMessage + 4, bigEndian_) + << ", drawable " << GetULONG(inputMessage + 8, bigEndian_) + << ", width " << GetUINT(inputMessage + 12, bigEndian_) + << ", height " << GetUINT(inputMessage + 14, bigEndian_) +- << ", size " << GetUINT(inputMessage + 2, bigEndian_) << 2 ++ << ", length " << inputLength + << ".\n" << logofs_flush; + + unsigned int p_id = GetULONG(inputMessage + 4, bigEndian_); +@@ -1042,6 +1172,11 @@ + break; + case X_CreateWindow: + { ++ #ifdef WARNING ++ if (inputLength < 32) ++ *logofs << "handleRead: X_CreateWindow inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + #ifdef TARGETS + + unsigned int w_id = GetULONG(inputMessage + 4, bigEndian_); +@@ -1054,7 +1189,7 @@ + #endif + + unsigned bitmask = GetULONG(inputMessage + 28, bigEndian_); +- encodeBuffer.encodeCachedValue((unsigned int) inputMessage[1], 8, ++ encodeBuffer.encodeCachedValue((unsigned int) inputDataByte, 8, + clientCache_ -> depthCache); + encodeBuffer.encodeXidValue(GetULONG(inputMessage + 8, bigEndian_), + clientCache_ -> windowCache); +@@ -1098,6 +1233,11 @@ + break; + case X_DeleteProperty: + { ++ #ifdef WARNING ++ if (inputLength < 12) ++ *logofs << "handleRead: X_DeleteProperty inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + encodeBuffer.encodeXidValue(GetULONG(inputMessage + 4, bigEndian_), + clientCache_ -> windowCache); + encodeBuffer.encodeValue(GetULONG(inputMessage + 8, bigEndian_), 29, 9); +@@ -1105,6 +1245,11 @@ + break; + case X_FillPoly: + { ++ #ifdef WARNING ++ if (inputLength < 16) ++ *logofs << "handleRead: X_FillPoly inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + #ifdef TARGETS + + unsigned int t_id = GetULONG(inputMessage + 4, bigEndian_); +@@ -1138,7 +1283,7 @@ + break; + } + +- unsigned int numPoints = ((inputLength - 16) >> 2); ++ unsigned int numPoints = (inputDataSize - 3); + + if (control -> isProtoStep10() == 1) + { +@@ -1209,7 +1354,12 @@ + break; + case X_FreeColors: + { +- unsigned int numPixels = GetUINT(inputMessage + 2, bigEndian_) - 3; ++ #ifdef WARNING ++ if (inputLength < 12) ++ *logofs << "handleRead: X_FreeColors inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif ++ unsigned int numPixels = inputDataSize - 2; + encodeBuffer.encodeValue(numPixels, 16, 4); + encodeBuffer.encodeCachedValue(GetULONG(inputMessage + 4, bigEndian_), 29, + clientCache_ -> colormapCache); +@@ -1225,12 +1375,22 @@ + break; + case X_FreeCursor: + { ++ #ifdef WARNING ++ if (inputLength < 8) ++ *logofs << "handleRead: X_FreeCursor inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + encodeBuffer.encodeCachedValue(GetULONG(inputMessage + 4, bigEndian_), + 29, clientCache_ -> cursorCache, 9); + } + break; + case X_FreeGC: + { ++ #ifdef WARNING ++ if (inputLength < 8) ++ *logofs << "handleRead: X_FreeGC inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + #ifdef TARGETS + + unsigned int g_id = GetULONG(inputMessage + 4, bigEndian_); +@@ -1284,6 +1444,11 @@ + break; + case X_FreePixmap: + { ++ #ifdef WARNING ++ if (inputLength < 8) ++ *logofs << "handleRead: X_FreePixmap inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + #ifdef TARGETS + + unsigned int p_id = GetULONG(inputMessage + 4, bigEndian_); +@@ -1318,6 +1483,11 @@ + break; + case X_GetAtomName: + { ++ #ifdef WARNING ++ if (inputLength < 8) ++ *logofs << "handleRead: X_GetAtomName inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + encodeBuffer.encodeValue(GetULONG(inputMessage + 4, bigEndian_), 29, 9); + + sequenceQueue_.push(clientSequence_, inputOpcode); +@@ -1327,6 +1497,11 @@ + break; + case X_GetGeometry: + { ++ #ifdef WARNING ++ if (inputLength < 8) ++ *logofs << "handleRead: X_GetGeometry inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + encodeBuffer.encodeXidValue(GetULONG(inputMessage + 4, bigEndian_), + clientCache_ -> drawableCache); + +@@ -1351,6 +1526,11 @@ + break; + case X_GetKeyboardMapping: + { ++ #ifdef WARNING ++ if (inputLength < 8) ++ *logofs << "handleRead: X_GetKeyboardMapping inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + encodeBuffer.encodeValue((unsigned int) inputMessage[4], 8); + encodeBuffer.encodeValue((unsigned int) inputMessage[5], 8); + +@@ -1361,6 +1541,11 @@ + break; + case X_GetProperty: + { ++ #ifdef WARNING ++ if (inputLength < 24) ++ *logofs << "handleRead: X_GetProperty inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + MessageStore *messageStore = clientStore_ -> + getRequestStore(X_GetProperty); + +@@ -1378,7 +1563,7 @@ + break; + } + +- encodeBuffer.encodeBoolValue((unsigned int) inputMessage[1]); ++ encodeBuffer.encodeBoolValue((unsigned int) inputDataByte); + encodeBuffer.encodeXidValue(GetULONG(inputMessage + 4, bigEndian_), + clientCache_ -> windowCache); + unsigned int property = GetULONG(inputMessage + 8, bigEndian_); +@@ -1394,6 +1579,11 @@ + break; + case X_GetSelectionOwner: + { ++ #ifdef WARNING ++ if (inputLength < 8) ++ *logofs << "handleRead: X_GetSelectionOwner inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + encodeBuffer.encodeCachedValue(GetULONG(inputMessage + 4, bigEndian_), 29, + clientCache_ -> getSelectionOwnerSelectionCache, 9); + +@@ -1404,7 +1594,12 @@ + break; + case X_GrabButton: + { +- encodeBuffer.encodeBoolValue((unsigned int) inputMessage[1]); ++ #ifdef WARNING ++ if (inputLength < 24) ++ *logofs << "handleRead: X_GrabButton inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif ++ encodeBuffer.encodeBoolValue((unsigned int) inputDataByte); + encodeBuffer.encodeXidValue(GetULONG(inputMessage + 4, bigEndian_), + clientCache_ -> windowCache); + encodeBuffer.encodeCachedValue(GetUINT(inputMessage + 8, bigEndian_), 16, +@@ -1423,7 +1618,12 @@ + break; + case X_GrabPointer: + { +- encodeBuffer.encodeBoolValue((unsigned int) inputMessage[1]); ++ #ifdef WARNING ++ if (inputLength < 24) ++ *logofs << "handleRead: X_GrabPointer inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif ++ encodeBuffer.encodeBoolValue((unsigned int) inputDataByte); + encodeBuffer.encodeXidValue(GetULONG(inputMessage + 4, bigEndian_), + clientCache_ -> windowCache); + encodeBuffer.encodeCachedValue(GetUINT(inputMessage + 8, bigEndian_), 16, +@@ -1448,7 +1648,12 @@ + break; + case X_GrabKeyboard: + { +- encodeBuffer.encodeBoolValue((unsigned int) inputMessage[1]); ++ #ifdef WARNING ++ if (inputLength < 12) ++ *logofs << "handleRead: X_GrabKeyboard inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif ++ encodeBuffer.encodeBoolValue((unsigned int) inputDataByte); + encodeBuffer.encodeXidValue(GetULONG(inputMessage + 4, bigEndian_), + clientCache_ -> windowCache); + unsigned int timestamp = GetULONG(inputMessage + 8, bigEndian_); +@@ -1471,6 +1676,11 @@ + break; + case X_PolyText8: + { ++ #ifdef WARNING ++ if (inputLength < 16) ++ *logofs << "handleRead: X_PolyText8 inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + #ifdef TARGETS + + unsigned int t_id = GetULONG(inputMessage + 4, bigEndian_); +@@ -1555,6 +1765,11 @@ + break; + case X_PolyText16: + { ++ #ifdef WARNING ++ if (inputLength < 16) ++ *logofs << "handleRead: X_PolyText16 inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + #ifdef TARGETS + + unsigned int t_id = GetULONG(inputMessage + 4, bigEndian_); +@@ -1639,6 +1854,11 @@ + break; + case X_ImageText8: + { ++ #ifdef WARNING ++ if (inputLength < 16 + (unsigned int)inputDataByte) ++ *logofs << "handleRead: X_ImageText8 inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + #ifdef TARGETS + + unsigned int t_id = GetULONG(inputMessage + 4, bigEndian_); +@@ -1673,7 +1893,7 @@ + break; + } + +- unsigned int textLength = (unsigned int) inputMessage[1]; ++ unsigned int textLength = (unsigned int) inputDataByte; + encodeBuffer.encodeCachedValue(textLength, 8, + clientCache_ -> imageTextLengthCache, 4); + encodeBuffer.encodeXidValue(GetULONG(inputMessage + 4, +@@ -1706,6 +1926,11 @@ + break; + case X_ImageText16: + { ++ #ifdef WARNING ++ if (inputLength < 16 + (unsigned int)inputDataByte) ++ *logofs << "handleRead: X_ImageText16 inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + #ifdef TARGETS + + unsigned int t_id = GetULONG(inputMessage + 4, bigEndian_); +@@ -1740,7 +1965,7 @@ + break; + } + +- unsigned int textLength = (unsigned int) inputMessage[1]; ++ unsigned int textLength = (unsigned int) inputDataByte; + encodeBuffer.encodeCachedValue(textLength, 8, + clientCache_ -> imageTextLengthCache, 4); + encodeBuffer.encodeXidValue(GetULONG(inputMessage + 4, +@@ -1773,6 +1998,11 @@ + break; + case X_InternAtom: + { ++ #ifdef WARNING ++ if (inputLength < 8) ++ *logofs << "handleRead: X_InternAtom inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + MessageStore *messageStore = clientStore_ -> + getRequestStore(X_InternAtom); + +@@ -1796,8 +2026,18 @@ + } + + unsigned int nameLength = GetUINT(inputMessage + 4, bigEndian_); ++ unsigned int maxLength = inputLength - 8; ++ if (nameLength > maxLength) ++ { ++ #ifdef WARNING ++ *logofs << "handleRead X_InternAtom bogus nameLength=" << nameLength ++ << " set to " << maxLength ++ << ".\n" << logofs_flush; ++ #endif ++ nameLength = maxLength; ++ } + encodeBuffer.encodeValue(nameLength, 16, 6); +- encodeBuffer.encodeBoolValue((unsigned int) inputMessage[1]); ++ encodeBuffer.encodeBoolValue((unsigned int) inputDataByte); + const unsigned char *nextSrc = inputMessage + 8; + + if (control -> isProtoStep7() == 1) +@@ -1827,7 +2067,22 @@ + break; + case X_ListFonts: + { ++ #ifdef WARNING ++ if (inputLength < 8) ++ *logofs << "handleRead: X_ListFonts inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + unsigned int textLength = GetUINT(inputMessage + 6, bigEndian_); ++ unsigned int maxLength = inputLength - 8; ++ if (textLength > maxLength) ++ { ++ #ifdef WARNING ++ *logofs << "handleRead X_ListFonts bogus textLength=" << textLength ++ << " set to " << maxLength ++ << ".\n" << logofs_flush; ++ #endif ++ textLength = maxLength; ++ } + encodeBuffer.encodeValue(textLength, 16, 6); + encodeBuffer.encodeValue(GetUINT(inputMessage + 4, bigEndian_), 16, 6); + const unsigned char* nextSrc = inputMessage + 8; +@@ -1853,7 +2108,22 @@ + case X_LookupColor: + case X_AllocNamedColor: + { ++ #ifdef WARNING ++ if (inputLength < 12) ++ *logofs << "handleRead: X_AllocNamedColor inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + unsigned int textLength = GetUINT(inputMessage + 8, bigEndian_); ++ unsigned int maxLength = inputLength - 12; ++ if (textLength > maxLength) ++ { ++ #ifdef WARNING ++ *logofs << "handleRead X_AllocNamedColor bogus textLength=" << textLength ++ << " set to " << maxLength ++ << ".\n" << logofs_flush; ++ #endif ++ textLength = maxLength; ++ } + encodeBuffer.encodeValue(textLength, 16, 6); + encodeBuffer.encodeCachedValue(GetULONG(inputMessage + 4, bigEndian_), + 29, clientCache_ -> colormapCache); +@@ -1886,6 +2156,11 @@ + case X_QueryPointer: + case X_QueryTree: + { ++ #ifdef WARNING ++ if (inputLength < 8) ++ *logofs << "handleRead: X_MapWindow...X_QueryTree inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + #ifdef TARGETS + + if (inputOpcode == X_DestroyWindow) +@@ -1923,7 +2198,22 @@ + break; + case X_OpenFont: + { ++ #ifdef WARNING ++ if (inputLength < 12) ++ *logofs << "handleRead: X_OpenFont inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + unsigned int nameLength = GetUINT(inputMessage + 8, bigEndian_); ++ unsigned int maxLength = inputLength - 12; ++ if (nameLength > maxLength) ++ { ++ #ifdef WARNING ++ *logofs << "handleRead X_InternAtom bogus nameLength=" << nameLength ++ << " set to " << maxLength ++ << ".\n" << logofs_flush; ++ #endif ++ nameLength = maxLength; ++ } + encodeBuffer.encodeValue(nameLength, 16, 7); + unsigned int font = GetULONG(inputMessage + 4, bigEndian_); + encodeBuffer.encodeValue(font - clientCache_ -> lastFont, 29, 5); +@@ -1947,6 +2237,11 @@ + break; + case X_PolyFillRectangle: + { ++ #ifdef WARNING ++ if (inputLength < 12) ++ *logofs << "handleRead: X_PolyFillRectangle inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + #ifdef TARGETS + + unsigned int t_id = GetULONG(inputMessage + 4, bigEndian_); +@@ -2034,6 +2329,11 @@ + break; + case X_PolyFillArc: + { ++ #ifdef WARNING ++ if (inputLength < 12) ++ *logofs << "handleRead: X_PolyFillArc inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + #ifdef TARGETS + + unsigned int t_id = GetULONG(inputMessage + 4, bigEndian_); +@@ -2135,6 +2435,11 @@ + break; + case X_PolyArc: + { ++ #ifdef WARNING ++ if (inputLength < 12) ++ *logofs << "handleRead: X_PolyArc inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + #ifdef TARGETS + + unsigned int t_id = GetULONG(inputMessage + 4, bigEndian_); +@@ -2236,6 +2541,11 @@ + break; + case X_PolyPoint: + { ++ #ifdef WARNING ++ if (inputLength < 12) ++ *logofs << "handleRead: X_PolyPoint inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + #ifdef TARGETS + + unsigned int t_id = GetULONG(inputMessage + 4, bigEndian_); +@@ -2269,8 +2579,8 @@ + break; + } + +- encodeBuffer.encodeValue(GetUINT(inputMessage + 2, bigEndian_) - 3, 16, 4); +- encodeBuffer.encodeBoolValue((unsigned int) inputMessage[1]); ++ encodeBuffer.encodeValue(inputDataSize - 2, 32, 4); ++ encodeBuffer.encodeBoolValue((unsigned int) inputDataByte); + encodeBuffer.encodeXidValue(GetULONG(inputMessage + 4, bigEndian_), + clientCache_ -> drawableCache); + encodeBuffer.encodeXidValue(GetULONG(inputMessage + 8, bigEndian_), +@@ -2303,6 +2613,11 @@ + break; + case X_PolyLine: + { ++ #ifdef WARNING ++ if (inputLength < 12) ++ *logofs << "handleRead: X_PolyLine inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + #ifdef TARGETS + + unsigned int t_id = GetULONG(inputMessage + 4, bigEndian_); +@@ -2336,8 +2651,8 @@ + break; + } + +- encodeBuffer.encodeValue(GetUINT(inputMessage + 2, bigEndian_) - 3, 16, 4); +- encodeBuffer.encodeBoolValue((unsigned int) inputMessage[1]); ++ encodeBuffer.encodeValue(inputDataSize - 2, 32, 4); ++ encodeBuffer.encodeBoolValue((unsigned int) inputDataByte); + encodeBuffer.encodeXidValue(GetULONG(inputMessage + 4, + bigEndian_), clientCache_ -> drawableCache); + encodeBuffer.encodeXidValue(GetULONG(inputMessage + 8, +@@ -2370,8 +2685,12 @@ + break; + case X_PolyRectangle: + { +- encodeBuffer.encodeValue((GetUINT(inputMessage + 2, +- bigEndian_) - 3) >> 1, 16, 3); ++ #ifdef WARNING ++ if (inputLength < 12) ++ *logofs << "handleRead: X_PolyRectangle inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif ++ encodeBuffer.encodeValue((inputDataSize - 2) >> 1, 32, 3); + encodeBuffer.encodeXidValue(GetULONG(inputMessage + 4, + bigEndian_), clientCache_ -> drawableCache); + encodeBuffer.encodeXidValue(GetULONG(inputMessage + 8, +@@ -2391,6 +2710,11 @@ + break; + case X_PolySegment: + { ++ #ifdef WARNING ++ if (inputLength < 12) ++ *logofs << "handleRead: X_PolySegment inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + #ifdef TARGETS + + unsigned int t_id = GetULONG(inputMessage + 4, bigEndian_); +@@ -2424,8 +2748,7 @@ + break; + } + +- encodeBuffer.encodeValue((GetUINT(inputMessage + 2, +- bigEndian_) - 3) >> 1, 16, 4); ++ encodeBuffer.encodeValue((inputDataSize - 2) >> 1, 32, 4); + encodeBuffer.encodeXidValue(GetULONG(inputMessage + 4, + bigEndian_), clientCache_ -> drawableCache); + encodeBuffer.encodeXidValue(GetULONG(inputMessage + 8, +@@ -2491,6 +2814,11 @@ + break; + case X_PutImage: + { ++ #ifdef WARNING ++ if (inputLength < 8) ++ *logofs << "handleRead: X_PutImage inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + #ifdef TARGETS + + unsigned int t_id = GetULONG(inputMessage + 4, bigEndian_); +@@ -2522,7 +2850,12 @@ + break; + case X_QueryBestSize: + { +- encodeBuffer.encodeValue((unsigned int)inputMessage[1], 2); ++ #ifdef WARNING ++ if (inputLength < 12) ++ *logofs << "handleRead: X_QueryBestSize inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif ++ encodeBuffer.encodeValue((unsigned int)inputDataByte, 2); + encodeBuffer.encodeXidValue(GetULONG(inputMessage + 4, + bigEndian_), clientCache_ -> drawableCache); + encodeBuffer.encodeValue(GetUINT(inputMessage + 8, bigEndian_), 16, 8); +@@ -2535,10 +2868,15 @@ + break; + case X_QueryColors: + { ++ #ifdef WARNING ++ if (inputLength < 8) ++ *logofs << "handleRead: X_QueryColors inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + // Differential encoding. + encodeBuffer.encodeBoolValue(1); + +- unsigned int numColors = ((inputLength - 8) >> 2); ++ unsigned int numColors = (inputDataSize - 1); + encodeBuffer.encodeValue(numColors, 16, 5); + encodeBuffer.encodeCachedValue(GetULONG(inputMessage + 4, bigEndian_), 29, + clientCache_ -> colormapCache); +@@ -2567,15 +2905,20 @@ + break; + case X_QueryExtension: + { ++ #ifdef WARNING ++ if (inputLength < 8) ++ *logofs << "handleRead: X_QueryExtension inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + #ifdef TEST + + char data[256]; + + int length = GetUINT(inputMessage + 4, bigEndian_); + +- if (length > 256) ++ if (length > 255) + { +- length = 256; ++ length = 255; + } + + strncpy(data, (char *) inputMessage + 8, length); +@@ -2588,6 +2931,16 @@ + #endif + + unsigned int nameLength = GetUINT(inputMessage + 4, bigEndian_); ++ unsigned int maxLength = inputLength - 8; ++ if (nameLength > maxLength) ++ { ++ #ifdef WARNING ++ *logofs << "handleRead X_QueryExtension bogus nameLength=" << nameLength ++ << " set to " << maxLength ++ << ".\n" << logofs_flush; ++ #endif ++ nameLength = maxLength; ++ } + encodeBuffer.encodeValue(nameLength, 16, 6); + const unsigned char *nextSrc = inputMessage + 8; + +@@ -2614,6 +2967,11 @@ + break; + case X_QueryFont: + { ++ #ifdef WARNING ++ if (inputLength < 8) ++ *logofs << "handleRead: X_QueryFont inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + unsigned int font = GetULONG(inputMessage + 4, bigEndian_); + encodeBuffer.encodeValue(font - clientCache_ -> lastFont, 29, 5); + clientCache_ -> lastFont = font; +@@ -2625,6 +2983,11 @@ + break; + case X_SetClipRectangles: + { ++ #ifdef WARNING ++ if (inputLength < 12) ++ *logofs << "handleRead: X_SetClipRectangles inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + MessageStore *messageStore = clientStore_ -> + getRequestStore(X_SetClipRectangles); + +@@ -2636,7 +2999,7 @@ + break; + } + +- unsigned int numRectangles = ((inputLength - 12) >> 3); ++ unsigned int numRectangles = ((inputDataSize - 2) >> 1); + + if (control -> isProtoStep9() == 1) + { +@@ -2647,7 +3010,7 @@ + encodeBuffer.encodeValue(numRectangles, 13, 4); + } + +- encodeBuffer.encodeValue((unsigned int) inputMessage[1], 2); ++ encodeBuffer.encodeValue((unsigned int) inputDataByte, 2); + encodeBuffer.encodeXidValue(GetULONG(inputMessage + 4, bigEndian_), + clientCache_ -> gcCache); + encodeBuffer.encodeCachedValue(GetUINT(inputMessage + 8, bigEndian_), 16, +@@ -2668,7 +3031,22 @@ + break; + case X_SetDashes: + { ++ #ifdef WARNING ++ if (inputLength < 12) ++ *logofs << "handleRead: X_SetDashes inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + unsigned int numDashes = GetUINT(inputMessage + 10, bigEndian_); ++ unsigned int maxLength = inputLength - 12; ++ if (numDashes > maxLength) ++ { ++ #ifdef WARNING ++ *logofs << "handleRead X_SetDashes bogus numDashes=" << numDashes ++ << " set to " << maxLength ++ << ".\n" << logofs_flush; ++ #endif ++ numDashes = maxLength; ++ } + encodeBuffer.encodeCachedValue(numDashes, 16, + clientCache_ -> setDashesLengthCache, 5); + encodeBuffer.encodeXidValue(GetULONG(inputMessage + 4, bigEndian_), +@@ -2683,6 +3061,11 @@ + break; + case X_SetSelectionOwner: + { ++ #ifdef WARNING ++ if (inputLength < 16) ++ *logofs << "handleRead: X_SetSelectionOwner inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + encodeBuffer.encodeCachedValue(GetULONG(inputMessage + 4, bigEndian_), 29, + clientCache_ -> setSelectionOwnerCache, 9); + encodeBuffer.encodeCachedValue(GetULONG(inputMessage + 8, bigEndian_), 29, +@@ -2693,6 +3076,11 @@ + break; + case X_TranslateCoords: + { ++ #ifdef WARNING ++ if (inputLength < 16) ++ *logofs << "handleRead: X_TranslateCoords inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + #ifdef TARGETS + + unsigned int t_id = GetULONG(inputMessage + 4, bigEndian_); +@@ -2764,6 +3152,11 @@ + break; + case X_GetImage: + { ++ #ifdef WARNING ++ if (inputLength < 20) ++ *logofs << "handleRead: X_GetImage inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + #ifdef TARGETS + + unsigned int t_id = GetULONG(inputMessage + 4, bigEndian_); +@@ -2802,7 +3195,7 @@ + } + + // Format. +- encodeBuffer.encodeValue((unsigned int) inputMessage[1], 2); ++ encodeBuffer.encodeValue((unsigned int) inputDataByte, 2); + // Drawable. + encodeBuffer.encodeXidValue(GetULONG(inputMessage + 4, + bigEndian_), clientCache_ -> drawableCache); +@@ -2869,6 +3262,11 @@ + } + else if (inputOpcode == opcodeStore_ -> putPackedImage) + { ++ #ifdef WARNING ++ if (inputLength < 24) ++ *logofs << "handleRead: putPackedImage inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + #ifdef TARGETS + + unsigned int t_id = GetULONG(inputMessage + 4, bigEndian_); +@@ -3004,7 +3402,7 @@ + << ".\n" << logofs_flush; + #endif + +- encodeBuffer.encodeCachedValue(*(inputMessage + 1), 8, ++ encodeBuffer.encodeCachedValue(inputDataByte, 8, + clientCache_ -> resourceCache); + } + else if (inputOpcode == opcodeStore_ -> freeUnpack) +@@ -3015,7 +3413,7 @@ + << ".\n" << logofs_flush; + #endif + +- encodeBuffer.encodeCachedValue(*(inputMessage + 1), 8, ++ encodeBuffer.encodeCachedValue(inputDataByte, 8, + clientCache_ -> resourceCache); + } + else if (inputOpcode == opcodeStore_ -> getControlParameters) +@@ -3130,6 +3528,11 @@ + // Enable or disable expose events + // coming from the real server. + // ++ #ifdef WARNING ++ if (inputLength < 8) ++ *logofs << "handleRead: setExposeParameters inputLength=" << inputLength ++ << ".\n" << logofs_flush; ++ #endif + + encodeBuffer.encodeBoolValue(*(inputMessage + 4)); + encodeBuffer.encodeBoolValue(*(inputMessage + 5)); +@@ -3198,10 +3601,10 @@ + { + if (hit) + { +- statistics -> addRenderCachedRequest(*(inputMessage + 1)); ++ statistics -> addRenderCachedRequest(inputDataByte); + } + +- statistics -> addRenderRequestBits(*(inputMessage + 1), inputLength << 3, bits); ++ statistics -> addRenderRequestBits(inputDataByte, inputLength << 3, bits); + } + + } // End if (firstRequest_)... else ... +@@ -4548,10 +4951,10 @@ + // + + /* +-FIXME: Recover the sequence number if the proxy ++Fixed as below? - FIXME: Recover the sequence number if the proxy + is not connected to an agent. + */ +- if (serverSequence_ > lastSequence_ || ++ if (SequenceNumber_x_gt_y(serverSequence_, lastSequence_) || + control -> SessionMode != session_proxy) + { + #ifdef DEBUG +@@ -4564,7 +4967,7 @@ + lastSequence_ = serverSequence_; + } + #ifdef DEBUG +- else if (serverSequence_ < lastSequence_) ++ else if (SequenceNumber_x_gt_y(lastSequence_, serverSequence_)) + { + // + // Use our last auto-generated sequence. +@@ -5003,6 +5406,12 @@ + break; + default: + { ++ // BEWARE: not only inputOpcode == GenericEvent but also ++ // others not handled above, at least: ++ // GraphicsExpose 13 ++ // MapRequest 20 ++ // ConfigureRequest 23 ++ // and any beyond LASTEvent. + #ifdef TEST + *logofs << "handleWrite: Using generic event compression " + << "for OPCODE#" << (unsigned int) outputOpcode +@@ -5014,11 +5423,51 @@ + + for (unsigned int i = 0; i < 14; i++) + { +- decodeBuffer.decodeCachedValue(value, 16, +- *serverCache_ -> genericEventIntCache[i]); ++ //decodeBuffer.decodeCachedValue(value, 16, ++ // *serverCache_ -> genericEventIntCache[i]); ++ if ( ! (decodeBuffer.decodeCachedValue(value, 16, ++ *serverCache_ -> genericEventIntCache[i])) ) ++ { ++ #ifdef WARNING ++ *logofs << "decodeCachedValue failed for GenEvt:" ++ << " buffer length=" << length ++ << " i=" << i ++ << "\n" << logofs_flush; ++ #endif ++ break; ++ } + + PutUINT(value, outputMessage + i * 2 + 4, bigEndian_); + } ++ // Handle "X Generic Event Extension" ++ // Extra data is not cached... ++ if (outputOpcode == GenericEvent && *(outputMessage+1) != 0 && outputLength == 32) ++ { ++ unsigned int extraOutputLength = (GetULONG(outputMessage + 4, bigEndian_) << 2); ++ if (extraOutputLength > 0 && extraOutputLength < 100*1024*1024) ++ { ++ // Extend buffer for the extra data ++ outputMessage = writeBuffer_.addMessage(extraOutputLength); ++ // Decode data and write into buffer at new position ++ for (unsigned int i = 0; i < (extraOutputLength>>1); i++) ++ { ++ //decodeBuffer.decodeValue(value, 16); ++ if ( ! (decodeBuffer.decodeValue(value, 16)) ) ++ { ++ #ifdef WARNING ++ *logofs << "decodeValue failed for GenEvt:" ++ << " extraOutputLength=" << extraOutputLength ++ << " buffer length=" << length ++ << " i=" << i ++ << "\n" << logofs_flush; ++ #endif ++ break; ++ } ++ PutUINT(value, outputMessage + i * 2, bigEndian_); ++ } ++ } ++ } ++ + } + } // End of switch (outputOpcode)... + +@@ -6892,7 +7341,7 @@ + } + else + { +- if (serverSequence_ > lastSequence_) ++ if (SequenceNumber_x_gt_y(serverSequence_, lastSequence_)) + { + #ifdef DEBUG + *logofs << "handleNotify: Updating last event's sequence " +@@ -6904,7 +7353,7 @@ + lastSequence_ = serverSequence_; + } + #ifdef DEBUG +- else if (serverSequence_ < lastSequence_) ++ else if (SequenceNumber_x_gt_y(lastSequence_, serverSequence_)) + { + // + // Use our last auto-generated sequence. +--- a/nxcomp/ClientReadBuffer.cpp ++++ b/nxcomp/ClientReadBuffer.cpp +@@ -119,15 +119,34 @@ + + dataLength = (GetUINT(start + 2, bigEndian_) << 2); + +- if (dataLength < 4) ++ if (dataLength == 0) // or equivalently (dataLength < 4) + { +- #ifdef TEST +- *logofs << "ClientReadBuffer: WARNING! Assuming length 4 " +- << "for suspicious message of length " << dataLength +- << ".\n" << logofs_flush; +- #endif ++ // BIG-REQUESTS extension ++ if (size < 8) ++ { ++ remaining_ = 8 - size; ++ return 0; ++ } + +- dataLength = 4; ++ dataLength = (GetULONG(start + 4, bigEndian_) << 2); ++ ++// See WRITE_BUFFER_OVERFLOW_SIZE elsewhere ++// and also ENCODE_BUFFER_OVERFLOW_SIZE DECODE_BUFFER_OVERFLOW_SIZE. ++ if (dataLength < 8 || dataLength > 100*1024*1024) ++ { ++ #ifdef WARNING ++ *logofs << "BIG-REQUESTS with unacceptable dataLength=" ++ << dataLength << ", now set to 8.\n" << logofs_flush; ++ #endif ++ dataLength = 8; ++ } ++ else if (dataLength < 4*64*1024) ++ { ++ #ifdef WARNING ++ *logofs << "BIG-REQUESTS with silly dataLength=" ++ << dataLength << ".\n" << logofs_flush; ++ #endif ++ } + } + } + +--- a/nxcomp/DecodeBuffer.cpp ++++ b/nxcomp/DecodeBuffer.cpp +@@ -78,34 +78,45 @@ + { + if (!endOkay) + { +- #ifdef PANIC +- *logofs << "DecodeBuffer: PANIC! Assertion failed. Error [A] " +- << "in decodeValue() nextSrc_ = " << (nextSrc_ - buffer_) +- << " end_ = " << (end_ - buffer_) << ".\n" +- << logofs_flush; ++ #ifdef WARNING ++ *logofs << "DecodeBuffer: Error [A] in decodeValue(), returning 0:" ++ << " nextSrc_ = " << (nextSrc_ - buffer_) ++ << " end_ = " << (end_ - buffer_) ++ << ".\n" << logofs_flush; + #endif +- +- // +- // Label "context" is just used to identify +- // the routine which detected the problem in +- // present source file. +- // +- +- cerr << "Error" << ": Failure decoding data in context [A].\n"; +- +- HandleAbort(); ++ value = 0; ++ return 0; ++ //#ifdef PANIC ++ //*logofs << "DecodeBuffer: PANIC! Assertion failed. Error [A] " ++ // << "in decodeValue() nextSrc_ = " << (nextSrc_ - buffer_) ++ // << " end_ = " << (end_ - buffer_) << ".\n" ++ // << logofs_flush; ++ //#endif ++ //// ++ //// Label "context" is just used to identify ++ //// the routine which detected the problem in ++ //// present source file. ++ //// ++ //cerr << "Error" << ": Failure decoding data in context [A].\n"; ++ //HandleAbort(); + } + +- #ifdef PANIC +- *logofs << "DecodeBuffer: PANIC! Assertion failed. Error [B] " +- << "in decodeValue() nextSrc_ = " << (nextSrc_ - buffer_) +- << " end_ = " << (end_ - buffer_) << ".\n" +- << logofs_flush; ++ #ifdef WARNING ++ *logofs << "DecodeBuffer: Error [B] in decodeValue(), returning 0:" ++ << " nextSrc_ = " << (nextSrc_ - buffer_) ++ << " end_ = " << (end_ - buffer_) ++ << ".\n" << logofs_flush; + #endif +- +- cerr << "Error" << ": Failure decoding data in context [B].\n"; +- +- HandleAbort(); ++ value = 0; ++ return 0; ++ //#ifdef PANIC ++ //*logofs << "DecodeBuffer: PANIC! Assertion failed. Error [B] " ++ // << "in decodeValue() nextSrc_ = " << (nextSrc_ - buffer_) ++ // << " end_ = " << (end_ - buffer_) << ".\n" ++ // << logofs_flush; ++ //#endif ++ //cerr << "Error" << ": Failure decoding data in context [B].\n"; ++ //HandleAbort(); + } + + lastBit = (nextSrcChar & srcMask_); +@@ -134,28 +145,40 @@ + { + if (!endOkay) + { +- #ifdef PANIC +- *logofs << "DecodeBuffer: PANIC! Assertion failed. Error [C] " +- << "in decodeValue() nextSrc_ = " << (nextSrc_ - buffer_) +- << " end_ = " << (end_ - buffer_) << ".\n" +- << logofs_flush; ++ #ifdef WARNING ++ *logofs << "DecodeBuffer: Error [C] in decodeValue(), returning 0:" ++ << " nextSrc_ = " << (nextSrc_ - buffer_) ++ << " end_ = " << (end_ - buffer_) ++ << ".\n" << logofs_flush; + #endif +- +- cerr << "Error" << ": Failure decoding data in context [C].\n"; +- +- HandleAbort(); ++ value = 0; ++ return 0; ++ //#ifdef PANIC ++ //*logofs << "DecodeBuffer: PANIC! Assertion failed. Error [C] " ++ // << "in decodeValue() nextSrc_ = " << (nextSrc_ - buffer_) ++ // << " end_ = " << (end_ - buffer_) << ".\n" ++ // << logofs_flush; ++ //#endif ++ //cerr << "Error" << ": Failure decoding data in context [C].\n"; ++ //HandleAbort(); + } + +- #ifdef PANIC +- *logofs << "DecodeBuffer: PANIC! Assertion failed. Error [D] " +- << "in decodeValue() nextSrc_ = " << (nextSrc_ - buffer_) +- << " end_ = " << (end_ - buffer_) << ".\n" +- << logofs_flush; ++ #ifdef WARNING ++ *logofs << "DecodeBuffer: Error [D] in decodeValue(), returning 0:" ++ << " nextSrc_ = " << (nextSrc_ - buffer_) ++ << " end_ = " << (end_ - buffer_) ++ << ".\n" << logofs_flush; + #endif +- +- cerr << "Error" << ": Failure decoding data in context [D].\n"; +- +- HandleAbort(); ++ value = 0; ++ return 0; ++ //#ifdef PANIC ++ //*logofs << "DecodeBuffer: PANIC! Assertion failed. Error [D] " ++ // << "in decodeValue() nextSrc_ = " << (nextSrc_ - buffer_) ++ // << " end_ = " << (end_ - buffer_) << ".\n" ++ // << logofs_flush; ++ //#endif ++ //cerr << "Error" << ": Failure decoding data in context [D].\n"; ++ //HandleAbort(); + } + + unsigned char moreData = (nextSrcChar & srcMask_); +@@ -212,16 +235,24 @@ + + if (nextSrc_ >= end_) + { +- #ifdef PANIC +- *logofs << "DecodeBuffer: PANIC! Assertion failed. Error [E] " +- << "in decodeValue() nextSrc_ = " << (nextSrc_ - buffer_) +- << " end_ = " << (end_ - buffer_) << ".\n" +- << logofs_flush; ++ #ifdef WARNING ++ *logofs << "DecodeBuffer: Error [E] in decodeCachedValue(), returning 0:" ++ << " nextSrc_ = " << (nextSrc_ - buffer_) ++ << " end_ = " << (end_ - buffer_) ++ << ".\n" << logofs_flush; + #endif +- +- cerr << "Error" << ": Failure decoding data in context [E].\n"; +- +- HandleAbort(); ++ // Failed: return value 0 ++ value = 0; ++ // Failed: return 0, though our callers do not check that... ++ return 0; ++ //#ifdef PANIC ++ //*logofs << "DecodeBuffer: PANIC! Assertion failed. Error [E] " ++ // << "in decodeValue() nextSrc_ = " << (nextSrc_ - buffer_) ++ // << " end_ = " << (end_ - buffer_) << ".\n" ++ // << logofs_flush; ++ //#endif ++ //cerr << "Error" << ": Failure decoding data in context [E].\n"; ++ //HandleAbort(); + } + + unsigned int index = 0; +@@ -237,30 +268,33 @@ + nextSrc_++; + if (nextSrc_ >= end_) + { +- if (!endOkay) +- { +- #ifdef PANIC +- *logofs << "DecodeBuffer: PANIC! Assertion failed. Error [F] " +- << "in decodeCachedValue() nextSrc_ = " +- << (nextSrc_ - buffer_) << " end_ = " +- << (end_ - buffer_) << ".\n" << logofs_flush; +- #endif +- +- cerr << "Error" << ": Failure decoding data in context [F].\n"; +- +- HandleAbort(); +- } +- +- #ifdef PANIC +- *logofs << "DecodeBuffer: PANIC! Assertion failed. Error [G] " +- << "in decodeValue() nextSrc_ = " << (nextSrc_ - buffer_) +- << " end_ = " << (end_ - buffer_) << ".\n" +- << logofs_flush; ++ #ifdef WARNING ++ *logofs << "DecodeBuffer: Error [G] in decodeCachedValue(), returning 0:" ++ << " nextSrc_ = " << (nextSrc_ - buffer_) ++ << " end_ = " << (end_ - buffer_) ++ << ".\n" << logofs_flush; + #endif +- +- cerr << "Error" << ": Failure decoding data in context [G].\n"; +- +- HandleAbort(); ++ value = 0; ++ return 0; ++ //if (!endOkay) ++ //{ ++ // #ifdef PANIC ++ // *logofs << "DecodeBuffer: PANIC! Assertion failed. Error [F] " ++ // << "in decodeCachedValue() nextSrc_ = " ++ // << (nextSrc_ - buffer_) << " end_ = " ++ // << (end_ - buffer_) << ".\n" << logofs_flush; ++ // #endif ++ // cerr << "Error" << ": Failure decoding data in context [F].\n"; ++ // HandleAbort(); ++ //} ++ //#ifdef PANIC ++ //*logofs << "DecodeBuffer: PANIC! Assertion failed. Error [G] " ++ // << "in decodeValue() nextSrc_ = " << (nextSrc_ - buffer_) ++ // << " end_ = " << (end_ - buffer_) << ".\n" ++ // << logofs_flush; ++ //#endif ++ //cerr << "Error" << ": Failure decoding data in context [G].\n"; ++ //HandleAbort(); + } + + nextSrcChar = *nextSrc_; +@@ -288,15 +322,20 @@ + return 1; + } + +- #ifdef PANIC +- *logofs << "DecodeBuffer: PANIC! Assertion failed. Error [H] " +- << "in decodeCacheValue() with no value found.\n" +- << logofs_flush; ++ #ifdef WARNING ++ *logofs << "DecodeBuffer: Error [H] in decodeCachedValue(), returning 0:" ++ << " no value found" ++ << ".\n" << logofs_flush; + #endif +- +- cerr << "Error" << ": Failure decoding data in context [H].\n"; +- +- HandleAbort(); ++ value = 0; ++ return 0; ++ //#ifdef PANIC ++ //*logofs << "DecodeBuffer: PANIC! Assertion failed. Error [H] " ++ // << "in decodeCacheValue() with no value found.\n" ++ // << logofs_flush; ++ //#endif ++ //cerr << "Error" << ": Failure decoding data in context [H].\n"; ++ //HandleAbort(); + } + else + { +@@ -323,15 +362,20 @@ + return 1; + } + +- #ifdef PANIC +- *logofs << "DecodeBuffer: PANIC! Assertion failed. Error [H] " +- << "in decodeCacheValue() with no value found.\n" +- << logofs_flush; ++ #ifdef WARNING ++ *logofs << "DecodeBuffer: Error [F] in decodeCachedValue(), returning 0:" ++ << " no value found" ++ << " .\n" << logofs_flush; + #endif +- +- cerr << "Error" << ": Failure decoding data in context [H].\n"; +- +- HandleAbort(); ++ value = 0; ++ return 0; ++ //#ifdef PANIC ++ //*logofs << "DecodeBuffer: PANIC! Assertion failed. Error [H] " ++ // << "in decodeCacheValue() with no value found.\n" ++ // << logofs_flush; ++ //#endif ++ //cerr << "Error" << ": Failure decoding data in context [H].\n"; ++ //HandleAbort(); + } + } + } +@@ -344,16 +388,22 @@ + + if (index > cache.getSize()) + { +- #ifdef PANIC +- *logofs << "DecodeBuffer: PANIC! Assertion failed. Error [I] " +- << "in decodeCachedValue() index = " << index +- << " cache size = " << cache.getSize() << ".\n" +- << logofs_flush; ++ #ifdef WARNING ++ *logofs << "DecodeBuffer: Error [I] in decodeCachedValue(), returning 0:" ++ << " index = " << index ++ << " cache size = " << cache.getSize() ++ << ".\n" << logofs_flush; + #endif +- +- cerr << "Error" << ": Failure decoding data in context [I].\n"; +- +- HandleAbort(); ++ value = 0; ++ return 0; ++ //#ifdef PANIC ++ //*logofs << "DecodeBuffer: PANIC! Assertion failed. Error [I] " ++ // << "in decodeCachedValue() index = " << index ++ // << " cache size = " << cache.getSize() << ".\n" ++ // << logofs_flush; ++ //#endif ++ //cerr << "Error" << ": Failure decoding data in context [I].\n"; ++ //HandleAbort(); + } + + value = cache.get(index); +@@ -401,16 +451,22 @@ + { + if (!endOkay) + { +- #ifdef PANIC +- *logofs << "DecodeBuffer: PANIC! Assertion failed. Error [K] " +- << "in decodeCachedValue() nextSrc_ " +- << (nextSrc_ - buffer_) << " end_ " << (end_ - buffer_) ++ #ifdef WARNING ++ *logofs << "DecodeBuffer: Error [K] in decodeCachedValue(), returning 0:" ++ << " nextSrc_ " << (nextSrc_ - buffer_) ++ << " end_ " << (end_ - buffer_) + << ".\n" << logofs_flush; + #endif +- +- cerr << "Error" << ": Failure decoding data in context [K].\n"; +- +- HandleAbort(); ++ value = 0; ++ return 0; ++ //#ifdef PANIC ++ //*logofs << "DecodeBuffer: PANIC! Assertion failed. Error [K] " ++ // << "in decodeCachedValue() nextSrc_ " ++ // << (nextSrc_ - buffer_) << " end_ " << (end_ - buffer_) ++ // << ".\n" << logofs_flush; ++ //#endif ++ //cerr << "Error" << ": Failure decoding data in context [K].\n"; ++ //HandleAbort(); + } + + #ifdef TEST +@@ -446,15 +502,20 @@ + } + else + { +- #ifdef PANIC +- *logofs << "DecodeBuffer: PANIC! Assertion failed. Error [M] " +- << "in decodeValue() with index = 2.\n" +- << logofs_flush; ++ #ifdef WARNING ++ *logofs << "DecodeBuffer: Error [M] in decodeCachedValue(), returning 0:" ++ << "with index = 2" ++ << ".\n" << logofs_flush; + #endif +- +- cerr << "Error" << ": Failure decoding data in context [M].\n"; +- +- HandleAbort(); ++ value = 0; ++ return 0; ++ //#ifdef PANIC ++ //*logofs << "DecodeBuffer: PANIC! Assertion failed. Error [M] " ++ // << "in decodeValue() with index = 2.\n" ++ // << logofs_flush; ++ //#endif ++ //cerr << "Error" << ": Failure decoding data in context [M].\n"; ++ //HandleAbort(); + } + } + else +@@ -466,16 +527,22 @@ + + if (index > cache.getSize()) + { +- #ifdef PANIC +- *logofs << "DecodeBuffer: PANIC! Assertion failed. Error [N] " +- << "in decodeCachedValue() " << "index = " << index +- << " cache size = " << cache.getSize() << ".\n" +- << logofs_flush; ++ #ifdef WARNING ++ *logofs << "DecodeBuffer: Error [N] in decodeCachedValue(), returning 0:" ++ << " index = " << index ++ << " cache size = " << cache.getSize() ++ << ".\n" << logofs_flush; + #endif +- +- cerr << "Error" << ": Failure decoding data in context [N].\n"; +- +- HandleAbort(); ++ value = 0; ++ return 0; ++ //#ifdef PANIC ++ //*logofs << "DecodeBuffer: PANIC! Assertion failed. Error [N] " ++ // << "in decodeCachedValue() " << "index = " << index ++ // << " cache size = " << cache.getSize() << ".\n" ++ // << logofs_flush; ++ //#endif ++ //cerr << "Error" << ": Failure decoding data in context [N].\n"; ++ //HandleAbort(); + } + + value = cache.get(index); +@@ -538,16 +605,22 @@ + } + else if (end_ - nextSrc_ < (int) numBytes) + { +- #ifdef PANIC +- *logofs << "DecodeBuffer: PANIC! Assertion failed. Error [P] " +- << "in decodeMemory() " << "with length " << numBytes ++ #ifdef WARNING ++ *logofs << "DecodeBuffer: Error [P] in decodeMemory(), returning NULL:" ++ << " with length " << numBytes + << " and " << (end_ - nextSrc_) +- << " bytes remaining.\n" << logofs_flush; ++ << " bytes remaining" ++ << ".\n" << logofs_flush; + #endif +- +- cerr << "Error" << ": Failure decoding data in context [P].\n"; +- +- HandleAbort(); ++ return NULL; ++ //#ifdef PANIC ++ //*logofs << "DecodeBuffer: PANIC! Assertion failed. Error [P] " ++ // << "in decodeMemory() " << "with length " << numBytes ++ // << " and " << (end_ - nextSrc_) ++ // << " bytes remaining.\n" << logofs_flush; ++ //#endif ++ //cerr << "Error" << ": Failure decoding data in context [P].\n"; ++ //HandleAbort(); + } + + nextSrc_ += numBytes; +--- a/nxcomp/DecodeBuffer.h ++++ b/nxcomp/DecodeBuffer.h +@@ -30,7 +30,8 @@ + #include "ActionCacheCompat.h" + #include "PositionCacheCompat.h" + +-#define DECODE_BUFFER_OVERFLOW_SIZE 4194304 ++// See WriteBuffer.h and EncodeBuffer.h ++#define DECODE_BUFFER_OVERFLOW_SIZE 104857600 + + #define DECODE_BUFFER_POSTFIX_SIZE 1 + +--- a/nxcomp/EncodeBuffer.h ++++ b/nxcomp/EncodeBuffer.h +@@ -33,10 +33,10 @@ + // + // This should match the maximum size of + // a single message added to write buffer +-// (see WriteBuffer.h). ++// (see WriteBuffer.h and DecodeBuffer.h). + // + +-#define ENCODE_BUFFER_OVERFLOW_SIZE 4194304 ++#define ENCODE_BUFFER_OVERFLOW_SIZE 104857600 + + // + // Adjust for the control messages and the +--- a/nxcomp/SequenceQueue.h ++++ b/nxcomp/SequenceQueue.h +@@ -18,6 +18,22 @@ + #ifndef SequenceQueue_H + #define SequenceQueue_H + ++inline int SequenceNumber_x_gt_y(unsigned int x, unsigned int y) ++{ ++ // For two sequence numbers x and y, determine whether (x > y). ++ // Sequence numbers are the trailing 16 bits of a bigger number: ++ // need to handle wraparound, e.g. 0 is 65536, just after 65535. ++ if (x != (x & 0x00ffff)) return 0; ++ if (y != (y & 0x00ffff)) return 0; ++ // Closeness when comparison makes sense: arbitrarily set at 16*1024 ++ if ((x > y) && ((x-y) < 16*1024)) return 1; ++ // Wrapped value ++ unsigned int w = x + 64*1024; ++ // We know that w>y but test left for symmetry ++ if ((w > y) && ((w-y) < 16*1024)) return 1; ++ return 0; ++} ++ + // + // List of outstanding request messages which + // are waiting for a reply. This class is used +--- a/nxcomp/ServerChannel.cpp ++++ b/nxcomp/ServerChannel.cpp +@@ -104,7 +104,8 @@ + // + + #define HIDE_MIT_SHM_EXTENSION +-#define HIDE_BIG_REQUESTS_EXTENSION ++// HIDE_BIG_REQUESTS_EXTENSION : No good to hide, some clients may send crap instead... ++#undef HIDE_BIG_REQUESTS_EXTENSION + #define HIDE_XFree86_Bigfont_EXTENSION + #undef HIDE_SHAPE_EXTENSION + #undef HIDE_XKEYBOARD_EXTENSION +@@ -1412,6 +1413,9 @@ + + unsigned int inputSequence = GetUINT(inputMessage + 2, bigEndian_); + ++ // Sometimes we get inputSequence=0 or =256 when inputOpcode=11=X_UnmapSubwindows ++ // Seems weird... but is "normal" and is to be accepted. ++ + // + // Check if this is an event which we can discard. + // +@@ -1905,6 +1909,12 @@ + break; + default: + { ++ // BEWARE: not only inputOpcode == GenericEvent but also ++ // others not handled above, at least: ++ // GraphicsExpose 13 ++ // MapRequest 20 ++ // ConfigureRequest 23 ++ // and any beyond LASTEvent. + #ifdef TEST + *logofs << "handleRead: Using generic event compression " + << "for OPCODE#" << (unsigned int) inputOpcode +@@ -1919,6 +1929,16 @@ + encodeBuffer.encodeCachedValue(GetUINT(inputMessage + i * 2 + 4, bigEndian_), + 16, *serverCache_ -> genericEventIntCache[i]); + } ++ // Handle "X Generic Event Extension" ++ // Cannot cache extra data... ++// FIXME: BUG ALERT: is it OK to have the first 32 bytes cached, but not the rest? ++ if (inputOpcode == GenericEvent && inputLength > 32) ++ { ++ for (unsigned int i = 14; i < ((inputLength-4)>>1); i++) ++ { ++ encodeBuffer.encodeValue(GetUINT(inputMessage + i * 2 + 4, bigEndian_), 16); ++ } ++ } + } + + } // switch (inputOpcode)... +@@ -3756,7 +3776,7 @@ + } + + unsigned int numPoints; +- decodeBuffer.decodeValue(numPoints, 16, 4); ++ decodeBuffer.decodeValue(numPoints, 32, 4); + outputLength = (numPoints << 2) + 12; + outputMessage = writeBuffer_.addMessage(outputLength); + unsigned int relativeCoordMode; +@@ -3802,7 +3822,7 @@ + } + + unsigned int numPoints; +- decodeBuffer.decodeValue(numPoints, 16, 4); ++ decodeBuffer.decodeValue(numPoints, 32, 4); + outputLength = (numPoints << 2) + 12; + outputMessage = writeBuffer_.addMessage(outputLength); + unsigned int relativeCoordMode; +@@ -3839,7 +3859,7 @@ + case X_PolyRectangle: + { + unsigned int numRectangles; +- decodeBuffer.decodeValue(numRectangles, 16, 3); ++ decodeBuffer.decodeValue(numRectangles, 32, 3); + outputLength = (numRectangles << 3) + 12; + outputMessage = writeBuffer_.addMessage(outputLength); + decodeBuffer.decodeXidValue(value, clientCache_ -> drawableCache); +@@ -3869,7 +3889,7 @@ + } + + unsigned int numSegments; +- decodeBuffer.decodeValue(numSegments, 16, 4); ++ decodeBuffer.decodeValue(numSegments, 32, 4); + outputLength = (numSegments << 3) + 12; + outputMessage = writeBuffer_.addMessage(outputLength); + decodeBuffer.decodeXidValue(value, clientCache_ -> drawableCache); +@@ -4590,7 +4610,29 @@ + + *outputMessage = (unsigned char) outputOpcode; + +- PutUINT(outputLength >> 2, outputMessage + 2, bigEndian_); ++ if (outputLength < 4*64*1024) ++ PutUINT(outputLength >> 2, outputMessage + 2, bigEndian_); ++ else ++ { ++ // Handle BIG-REQUESTS ++ PutUINT(0, outputMessage + 2, bigEndian_); ++// FIXME: BUG ALERT: following write may not work well, ++// particularly with un-flushed messages. ++if (outputMessage != writeBuffer_.getData()) ++{ ++*logofs << "PSz BUG handleWrite BIG-REQUESTS:" ++ << " have " << (unsigned int)(outputMessage - writeBuffer_.getData()) ++ << " bytes in buffer" ++ << ", write immediate of 4-byte header will not work well" ++ << "\n" << logofs_flush; ++} ++// But, it works well enough in my testing... ++ // Write first four bytes ++ if (transport_ -> write(write_immediate, outputMessage, 4) < 0) ++ return -1; ++ // Replace with new 4-byte length ++ PutULONG(1 + (outputLength >> 2), outputMessage, bigEndian_); ++ } + + #if defined(TEST) || defined(OPCODES) + *logofs << "handleWrite: Handled request OPCODE#" +@@ -5912,7 +5954,7 @@ + unsigned char opcode = *lastMotion_; + unsigned int size = 32; + +- if (GetUINT(buffer + 2, bigEndian_) < serverSequence_) ++ if (SequenceNumber_x_gt_y(serverSequence_, GetUINT(buffer + 2, bigEndian_))) + { + PutUINT(serverSequence_, (unsigned char *) buffer + 2, bigEndian_); + } +--- a/nxcomp/ServerReadBuffer.cpp ++++ b/nxcomp/ServerReadBuffer.cpp +@@ -108,14 +108,21 @@ + { + dataLength = 32 + (GetULONG(start + 4, bigEndian_) << 2); + } ++ else if (*start == GenericEvent && *(start+1) != 0) ++ { ++ // X Generic Event Extension ++ dataLength = 32 + (GetULONG(start + 4, bigEndian_) << 2); ++ } + else + { + dataLength = 32; + } + +- if (dataLength < 32) ++// See WRITE_BUFFER_OVERFLOW_SIZE elsewhere ++// and also ENCODE_BUFFER_OVERFLOW_SIZE DECODE_BUFFER_OVERFLOW_SIZE. ++ if (dataLength < 32 || dataLength > 100*1024*1024) + { +- #ifdef TEST ++ #ifdef WARNING + *logofs << "ServerReadBuffer: WARNING! Assuming length 32 " + << "for suspicious message of length " << dataLength + << ".\n" << logofs_flush; +--- a/nxcomp/WriteBuffer.h ++++ b/nxcomp/WriteBuffer.h +@@ -32,8 +32,14 @@ + // This is likely to be a reply to a X_ListFonts where + // user has a large amount of installed fonts. + // ++// Used also for messages sent, and should accommodate any BIG-REQUESTS. ++// Value was 4MB = 4194304, changed to 100MB = 104857600. ++// See also sanity check limits (set same, to 100*1024*1024) in ++// ClientReadBuffer.cpp ServerReadBuffer.cpp and ClientChannel.cpp, and ++// ENCODE_BUFFER_OVERFLOW_SIZE DECODE_BUFFER_OVERFLOW_SIZE elsewhere. ++// + +-#define WRITE_BUFFER_OVERFLOW_SIZE 4194304 ++#define WRITE_BUFFER_OVERFLOW_SIZE 104857600 + + class WriteBuffer + { |