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

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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4
goodbyedpi.c
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@ -355,11 +355,11 @@ int main(int argc, char *argv[]) {
if (addr.Direction == WINDIVERT_DIRECTION_INBOUND &&
ppTcpHdr->Syn == 1) {
//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);
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);
WinDivertHelperCalcChecksums(packet, packetLen, 0);
}