mirror of
https://github.com/ValdikSS/GoodbyeDPI.git
synced 2024-12-22 14:26:08 +00:00
Test
This commit is contained in:
parent
2f0429027d
commit
64c93d29de
126
goodbyedpi.c
126
goodbyedpi.c
@ -296,141 +296,35 @@ int main(int argc, char *argv[]) {
|
|||||||
|
|
||||||
while (1) {
|
while (1) {
|
||||||
if (WinDivertRecv(w_filter, packet, sizeof(packet), &addr, &packetLen)) {
|
if (WinDivertRecv(w_filter, packet, sizeof(packet), &addr, &packetLen)) {
|
||||||
//printf("Got %s packet, len=%d!\n", addr.Direction ? "inbound" : "outbound",
|
printf("Got %s packet, len=%d!\n", addr.Direction ? "inbound" : "outbound",
|
||||||
// packetLen);
|
packetLen);
|
||||||
should_reinject = 1;
|
|
||||||
should_recalc_checksum = 0;
|
|
||||||
|
|
||||||
|
// do nothing for DATA packet
|
||||||
if (WinDivertHelperParsePacket(packet, packetLen, &ppIpHdr,
|
if (WinDivertHelperParsePacket(packet, packetLen, &ppIpHdr,
|
||||||
NULL, NULL, NULL, &ppTcpHdr, NULL, &packet_data, &packet_dataLen)) {
|
NULL, NULL, NULL, &ppTcpHdr, NULL, &packet_data, &packet_dataLen)) {
|
||||||
//printf("Got parsed packet, len=%d!\n", packet_dataLen);
|
|
||||||
/* Got a packet WITH DATA */
|
|
||||||
|
|
||||||
/* Handle INBOUND packet with data and find HTTP REDIRECT in there */
|
|
||||||
if (addr.Direction == WINDIVERT_DIRECTION_INBOUND && packet_dataLen > 16) {
|
|
||||||
/* If INBOUND packet with DATA (tcp.Ack) */
|
|
||||||
|
|
||||||
/* Drop packets from filter with HTTP 30x Redirect */
|
|
||||||
if (do_passivedpi && is_passivedpi_redirect(packet_data, packet_dataLen)) {
|
|
||||||
//printf("Dropping HTTP Redirect packet!\n");
|
|
||||||
should_reinject = 0;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
/* Handle OUTBOUND packet, search for Host header */
|
|
||||||
else if (addr.Direction == WINDIVERT_DIRECTION_OUTBOUND &&
|
|
||||||
packet_dataLen > 16 && ppTcpHdr->DstPort == htons(80) &&
|
|
||||||
find_http_method_end(packet_data,
|
|
||||||
(do_fragment_http ? http_fragment_size : 0)) &&
|
|
||||||
(do_host || do_host_removespace))
|
|
||||||
{
|
|
||||||
|
|
||||||
data_addr = find_host_header(packet_data, packet_dataLen);
|
|
||||||
if (data_addr) {
|
|
||||||
|
|
||||||
if (do_host) {
|
|
||||||
/* Replace "Host: " with "hoSt: " */
|
|
||||||
memcpy(data_addr, http_host_replace, strlen(http_host_replace));
|
|
||||||
should_recalc_checksum = 1;
|
|
||||||
//printf("Replaced Host header!\n");
|
|
||||||
}
|
}
|
||||||
|
|
||||||
if (do_additional_space && do_host_removespace) {
|
// reduce window size on non-data packet
|
||||||
/* End of "Host:" without trailing space */
|
|
||||||
host_addr = data_addr + strlen(http_host_find) - 1;
|
|
||||||
method_addr = find_http_method_end(packet_data,
|
|
||||||
(do_fragment_http ? http_fragment_size : 0));
|
|
||||||
|
|
||||||
if (method_addr) {
|
|
||||||
memmove(method_addr + 1, method_addr, (PVOID)host_addr - (PVOID)method_addr);
|
|
||||||
should_recalc_checksum = 1;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
else if (do_host_removespace) {
|
|
||||||
host_addr = data_addr + strlen(http_host_find);
|
|
||||||
|
|
||||||
data_addr_rn = dumb_memmem(host_addr,
|
|
||||||
packet_dataLen - ((PVOID)host_addr - packet_data),
|
|
||||||
"\r\n", 2);
|
|
||||||
if (data_addr_rn) {
|
|
||||||
/* We move Host header value by one byte to the left and then
|
|
||||||
* "insert" stolen space to the end of User-Agent value because
|
|
||||||
* some web servers are not tolerant to additional space in the
|
|
||||||
* end of Host header.
|
|
||||||
*
|
|
||||||
* Nothing is done if User-Agent header is missing.
|
|
||||||
*/
|
|
||||||
host_len = data_addr_rn - host_addr;
|
|
||||||
useragent_addr = find_useragent_header(packet_data, packet_dataLen);
|
|
||||||
if (host_len <= 253 && useragent_addr) {
|
|
||||||
useragent_addr += strlen(http_useragent_find);
|
|
||||||
/* useragent_addr is in the beginning of User-Agent value */
|
|
||||||
|
|
||||||
data_len = packet_dataLen - ((PVOID)useragent_addr - packet_data);
|
|
||||||
data_addr_rn = dumb_memmem(useragent_addr,
|
|
||||||
data_len, "\r\n", 2);
|
|
||||||
/* data_addr_rn is in the end of User-Agent value */
|
|
||||||
|
|
||||||
if (data_addr_rn) {
|
|
||||||
if (useragent_addr > host_addr) {
|
|
||||||
/* User-Agent goes AFTER Host header */
|
|
||||||
data_len = (PVOID)data_addr_rn - (PVOID)host_addr;
|
|
||||||
|
|
||||||
/* Move one byte to the LEFT from "Host:"
|
|
||||||
* to the end of User-Agent
|
|
||||||
*/
|
|
||||||
memmove(host_addr - 1, host_addr, data_len);
|
|
||||||
/* Put space in the end of User-Agent header */
|
|
||||||
*(char*)(data_addr_rn - 1) = ' ';
|
|
||||||
should_recalc_checksum = 1;
|
|
||||||
//printf("Replaced Host header!\n");
|
|
||||||
}
|
|
||||||
else {
|
|
||||||
/* User-Agent goes BEFORE Host header */
|
|
||||||
data_len = (PVOID)host_addr - (PVOID)data_addr_rn - 1;
|
|
||||||
|
|
||||||
/* Move one byte to the RIGHT from the end of User-Agent
|
|
||||||
* to the "Host:"
|
|
||||||
*/
|
|
||||||
memmove(data_addr_rn + 1, data_addr_rn, data_len);
|
|
||||||
/* Put space in the end of User-Agent header */
|
|
||||||
*(char*)(data_addr_rn) = ' ';
|
|
||||||
should_recalc_checksum = 1;
|
|
||||||
//printf("Replaced Host header!\n");
|
|
||||||
}
|
|
||||||
} /* if (dara_addr_rn) */
|
|
||||||
} /* if (host_len <= 253 && useragent_addr) */
|
|
||||||
} /* if (data_addr_rn) */
|
|
||||||
} /* else if (do_host_removespace) */
|
|
||||||
} /* if (data_addr) */
|
|
||||||
} /* Handle OUTBOUND packet with data */
|
|
||||||
} /* Handle packet with data */
|
|
||||||
|
|
||||||
/* Else if we got TCP packet without data */
|
|
||||||
else if (WinDivertHelperParsePacket(packet, packetLen, &ppIpHdr,
|
else if (WinDivertHelperParsePacket(packet, packetLen, &ppIpHdr,
|
||||||
NULL, NULL, NULL, &ppTcpHdr, NULL, NULL, NULL)) {
|
NULL, NULL, NULL, &ppTcpHdr, NULL, NULL, NULL)) {
|
||||||
/* If we got SYN+ACK packet */
|
/* If we got SYN+ACK packet */
|
||||||
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->SrcPort == htons(80)) {
|
if (do_fragment_http && ppTcpHdr->SrcPort == htons(80)) {
|
||||||
change_window_size(packet, http_fragment_size);
|
change_window_size(packet, http_fragment_size);
|
||||||
should_recalc_checksum = 1;
|
WinDivertHelperCalcChecksums(packet, packetLen, 0);
|
||||||
}
|
}
|
||||||
else if (do_fragment_https && ppTcpHdr->SrcPort != 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);
|
||||||
should_recalc_checksum = 1;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
if (should_reinject) {
|
|
||||||
//printf("Re-injecting!\n");
|
|
||||||
if (should_recalc_checksum) {
|
|
||||||
WinDivertHelperCalcChecksums(packet, packetLen, 0);
|
WinDivertHelperCalcChecksums(packet, packetLen, 0);
|
||||||
}
|
}
|
||||||
WinDivertSend(w_filter, packet, packetLen, &addr, NULL);
|
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
// uncomment this to make it work
|
||||||
|
//WinDivertHelperCalcChecksums(packet, packetLen, 0);
|
||||||
|
WinDivertSend(w_filter, packet, packetLen, &addr, NULL);
|
||||||
|
}
|
||||||
else {
|
else {
|
||||||
// error, ignore
|
// error, ignore
|
||||||
printf("Error receiving packet!\n");
|
printf("Error receiving packet!\n");
|
||||||
|
Loading…
Reference in New Issue
Block a user