Gamercat/GoodbyeDPI
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Change TCP Window Size based on SrcPort, not DstPort.

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When HTTPS fragment size was set, the program always used it for HTTP, even
if HTTP fragmentation was disabled. This is due to a bug which checked DstPort,
not SrcPort, and the packets passed DstPort != htons(80) HTTPS check.
This commit is contained in:
ValdikSS 2017-06-11 21:50:22 +03:00
parent 2a5e4a071b
commit f5ac7c0d67
1 changed files with 2 additions and 2 deletions
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goodbyedpi.c
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@ -355,11 +355,11 @@ int main(int argc, char *argv[]) {
if (addr.Direction == WINDIVERT_DIRECTION_INBOUND && if (addr.Direction == WINDIVERT_DIRECTION_INBOUND &&
ppTcpHdr->Syn == 1) { ppTcpHdr->Syn == 1) {
//printf("Changing Window Size!\n"); //printf("Changing Window Size!\n");
if (do_fragment_http && ppTcpHdr->DstPort == htons(80)) { if (do_fragment_http && ppTcpHdr->SrcPort == htons(80)) {
change_window_size(packet, http_fragment_size); change_window_size(packet, http_fragment_size);
WinDivertHelperCalcChecksums(packet, packetLen, 0); WinDivertHelperCalcChecksums(packet, packetLen, 0);
} }
else if (do_fragment_https && ppTcpHdr->DstPort != htons(80)) { else if (do_fragment_https && ppTcpHdr->SrcPort != htons(80)) {
change_window_size(packet, https_fragment_size); change_window_size(packet, https_fragment_size);
WinDivertHelperCalcChecksums(packet, packetLen, 0); WinDivertHelperCalcChecksums(packet, packetLen, 0);
} }