GoodbyeDPI v0.1.8

Update readme
Update github issue templates
2025-12-17 12:54:36 +03:00 · 2021-12-26 20:29:24 +03:00 · 2021-12-26 20:24:16 +03:00 · 2021-12-26 20:10:18 +03:00 · 2021-12-26 19:05:03 +03:00 · 2021-12-26 18:42:26 +03:00
18 changed files with 1152 additions and 211 deletions
--- a/.github/ISSUE_TEMPLATE/bug.yml
+++ b/.github/ISSUE_TEMPLATE/bug.yml
@@ -0,0 +1,47 @@
+name: Bug Report / Сообщение об ошибке
+description: File a bug report / Сообщить об ошибке в проекте
+
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Please pay some attention!
+        GoodbyeDPI does not guarantee to work on your ISP on 100% or at all. If GoodbyeDPI can't unblock some or any websites, this is most likely not a software bug, and you should not report it.
+        Please report software bugs, such as: website incompatibility (if the website works without GoodbyeDPI but breaks with GoobyeDPI enabled), antivirus incompatibility, DNS redirection problems, incorrect packet handling, and other software issues.
+        Please make sure to check other opened and closed issues, it could be your question or issue has been already discussed.
+
+        Пожалуйста, прочтите!
+        GoodbyeDPI не гарантирует ни 100% работу с вашим провайдером, ни работу вообще. Если GoodbyeDPI не разблокирует доступ к некоторым или всем веб-сайтам, вероятнее всего, это не программная ошибка, и не стоит о ней сообщать здесь.
+        Сообщайте только об ошибках в программе, таких как: некорректная работа с веб-сайтами (когда веб-сайт работает без GoodbyeDPI, но ломается с GoodbyeDPI), несовместимость с антивирусами, проблемы с перенаправлением DNS, некорректная обработка пакетов, и другие проблемы.
+        Также посмотрите другие открытые и закрытые баги. Возможно, ваш вопрос или проблема уже обсуждались.
+  - type: input
+    id: os
+    attributes:
+      label: Operating system / операционная система
+      description: Enter your Windows version. For Windows 10 and 11 include build/update number.
+      placeholder: ex. Windows 10 20H2
+    validations:
+      required: true
+  - type: dropdown
+    id: is-svc
+    attributes:
+      label: Running as service / Запуск программы как сервис
+      description: Do you use GoodbyeDPI as a Windows Service?
+      options:
+        - I run it as a regular program / Запускаю программу обычным образом
+        - I installed it as a service / Установил как сервис Windows
+    validations:
+      required: true
+  - type: textarea
+    id: what-happened
+    attributes:
+      label: Describe the issue / Опишите проблему
+      description: A clear and concise description of what the bug is / Подробно опишите, в чём заключается проблема
+      placeholder: Attach the screenshots for clarity / При необходимости приложите скриншоты
+    validations:
+      required: true
+  - type: textarea
+    id: additional-info
+    attributes:
+      label: Additional information / Дополнительная информация
+      description: If you have a hints on why this bug happens, you can express it here / Если у вас есть предположения об источнике бага, вы можете изложить их здесь
--- a/.github/ISSUE_TEMPLATE/config.yml
+++ b/.github/ISSUE_TEMPLATE/config.yml
@@ -0,0 +1,5 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Questions about the program / Вопросы по програме
+    url: https://ntc.party/c/community-software/goodbyedpi/8
+    about: Please ask and answer questions on forum / Пожалуйста, задавайте вопросы только на форуме
--- a/.github/ISSUE_TEMPLATE/feature.yml
+++ b/.github/ISSUE_TEMPLATE/feature.yml
@@ -0,0 +1,15 @@
+name:  Feature request / Предложить новую функциональность 
+description:  Suggest an idea or function for this project / Предложить новую идею или функциональность в программе
+
+body:
+  - type: markdown
+    attributes:
+      value: |
+        If you think of a great function or circumvention method which is missing from the program, go ahead and suggest it here.
+        Если вы придумали новую функцию или метод обхода, которого еще нет в программе, напишите о нем подробнее здесь.
+  - type: textarea
+    id: description
+    attributes:
+      label: Describe your feature / Опишите ваше предложение
+    validations:
+      required: true
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -0,0 +1,75 @@
+name: Build GoodbyeDPI
+
+on:
+  push:
+    paths:
+      - 'src/**'
+
+env:
+  WINDIVERT_URL: https://www.reqrypt.org/download/WinDivert-1.4.3-A.zip
+  WINDIVERT_NAME: WinDivert-1.4.3-A.zip
+  WINDIVERT_SHA256: 4084bc3931f31546d375ed89e3f842776efa46f321ed0adcd32d3972a7d02566
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Declare short commit variable
+        id: vars
+        run: |
+          echo "::set-output name=sha_short::$(git rev-parse --short HEAD)"
+
+      - name: Install MinGW-w64
+        run: >
+          sudo DEBIAN_FRONTEND=noninteractive XZ_DEFAULTS="-T0" XZ_OPT="-T0" eatmydata
+          apt install -y --no-install-recommends gcc-mingw-w64
+
+      - name: Download WinDivert from cache
+        id: windivert-cache
+        uses: actions/cache@v2
+        with:
+          path: ${{ env. WINDIVERT_NAME }}
+          key: ${{ env. WINDIVERT_SHA256 }}
+
+      - name: Download WinDivert from the website
+        if: steps.windivert-cache.outputs.cache-hit != 'true'
+        run: >
+          wget ${{ env. WINDIVERT_URL }} &&
+          (echo ${{ env. WINDIVERT_SHA256 }} ${{ env. WINDIVERT_NAME }} | sha256sum -c)
+
+      - name: Unpack WinDivert
+        run: unzip ${{ env. WINDIVERT_NAME }}
+
+      - name: Compile x86_64
+        run: >
+          cd src && make clean &&
+          make CPREFIX=x86_64-w64-mingw32- BIT64=1 WINDIVERTHEADERS=../WinDivert-1.4.3-A/include WINDIVERTLIBS=../WinDivert-1.4.3-A/x86_64 -j4
+      
+      - name: Prepare x86_64 directory
+        run: |
+          mkdir goodbyedpi_x86_64_${{ steps.vars.outputs.sha_short }}
+          cp src/goodbyedpi.exe WinDivert-1.4.3-A/x86_64/*.{dll,sys} goodbyedpi_x86_64_${{ steps.vars.outputs.sha_short }}
+
+      - name: Upload output file x86_64 (64 bit)
+        uses: actions/upload-artifact@v2
+        with:
+          name: goodbyedpi_x86_64_${{ steps.vars.outputs.sha_short }}
+          path: goodbyedpi_x86_64_${{ steps.vars.outputs.sha_short }}
+
+      - name: Compile i686
+        run: >
+          cd src && make clean &&
+          make CPREFIX=i686-w64-mingw32- WINDIVERTHEADERS=../WinDivert-1.4.3-A/include WINDIVERTLIBS=../WinDivert-1.4.3-A/x86 -j4
+
+      - name: Prepare x86 directory
+        run: |
+          mkdir goodbyedpi_x86_${{ steps.vars.outputs.sha_short }}
+          cp src/goodbyedpi.exe WinDivert-1.4.3-A/x86/*.{dll,sys} goodbyedpi_x86_${{ steps.vars.outputs.sha_short }}
+
+      - name: Upload output file x86
+        uses: actions/upload-artifact@v2
+        with:
+          name: goodbyedpi_x86_${{ steps.vars.outputs.sha_short }}
+          path: goodbyedpi_x86_${{ steps.vars.outputs.sha_short }}
--- a/README.md
+++ b/README.md
@@ -17,36 +17,59 @@ Usage: goodbyedpi.exe [OPTION...]
 -r          replace Host with hoSt
 -s          remove space between host header and its value
 -m          mix Host header case (test.com -> tEsT.cOm)
- -f [value]  set HTTP fragmentation to value
- -k [value]  enable HTTP persistent (keep-alive) fragmentation and set it to value
+ -f <value>  set HTTP fragmentation to value
+ -k <value>  enable HTTP persistent (keep-alive) fragmentation and set it to value
 -n          do not wait for first segment ACK when -k is enabled
- -e [value]  set HTTPS fragmentation to value
+ -e <value>  set HTTPS fragmentation to value
 -a          additional space between Method and Request-URI (enables -s, may break sites)
 -w          try to find and parse HTTP traffic on all processed ports (not only on port 80)
- --port        [value]    additional TCP port to perform fragmentation on (and HTTP tricks with -w)
- --ip-id       [value]    handle additional IP ID (decimal, drop redirects and TCP RSTs with this ID).
+ --port        <value>    additional TCP port to perform fragmentation on (and HTTP tricks with -w)
+ --ip-id       <value>    handle additional IP ID (decimal, drop redirects and TCP RSTs with this ID).
                          This option can be supplied multiple times.
- --dns-addr    [value]    redirect UDP DNS requests to the supplied IP address (experimental)
- --dns-port    [value]    redirect UDP DNS requests to the supplied port (53 by default)
- --dnsv6-addr  [value]    redirect UDPv6 DNS requests to the supplied IPv6 address (experimental)
- --dnsv6-port  [value]    redirect UDPv6 DNS requests to the supplied port (53 by default)
+ --dns-addr    <value>    redirect UDP DNS requests to the supplied IP address (experimental)
+ --dns-port    <value>    redirect UDP DNS requests to the supplied port (53 by default)
+ --dnsv6-addr  <value>    redirect UDPv6 DNS requests to the supplied IPv6 address (experimental)
+ --dnsv6-port  <value>    redirect UDPv6 DNS requests to the supplied port (53 by default)
 --dns-verb               print verbose DNS redirection messages
- --blacklist   [txtfile]  perform HTTP tricks only to host names and subdomains from
-                          supplied text file. This option can be supplied multiple times.
+ --blacklist   <txtfile>  perform circumvention tricks only to host names and subdomains from
+                          supplied text file (HTTP Host/TLS SNI).
+                          This option can be supplied multiple times.
+ --set-ttl     <value>    activate Fake Request Mode and send it with supplied TTL value.
+                          DANGEROUS! May break websites in unexpected ways. Use with care.
+ --auto-ttl    [decttl]   activate Fake Request Mode, automatically detect TTL and decrease
+                          it from standard 64 or 128 by decttl (128/64 - TTL - 4 by default).
+ --wrong-chksum           activate Fake Request Mode and send it with incorrect TCP checksum.
+                          May not work in a VM or with some routers, but is safer than set-ttl.
+ --wrong-seq              activate Fake Request Mode and send it with TCP SEQ/ACK in the past.
+ --native-frag            fragment (split) the packets by sending them in smaller packets, without
+                          shrinking the Window Size. Works faster (does not slow down the connection)
+                          and better.
+ --reverse-frag           fragment (split) the packets just as --native-frag, but send them in the
+                          reversed order. Works with the websites which could not handle segmented
+                          HTTPS TLS ClientHello (because they receive the TCP flow "combined").

- -1          -p -r -s -f 2 -k 2 -n -e 2 (most compatible mode, default)
+
+LEGACY modesets:
+ -1          -p -r -s -f 2 -k 2 -n -e 2 (most compatible mode)
 -2          -p -r -s -f 2 -k 2 -n -e 40 (better speed for HTTPS yet still compatible)
 -3          -p -r -s -e 40 (better speed for HTTP and HTTPS)
 -4          -p -r -s (best speed)
+
+Modern modesets (more stable, more compatible, faster):
+ -5          -f 2 -e 2 --auto-ttl --reverse-frag (this is the default)
+ -6          -f 2 -e 2 --wrong-seq --reverse-frag
 ```

-To check if your ISP's DPI could be circumvented, run `3_all_dnsredir_hardcore.cmd` first. This is the most hardcore mode which will show if this program is suitable for your ISP and DPI vendor at all. If you can open blocked websites with this mode, it means your ISP has DPI which can be circumvented. This is the slowest and prone to break websites mode, but suitable for most DPI.
+To check if your ISP's DPI could be circumvented, first make sure that your provider does not poison DNS answers by enabling "Secure DNS (DNS over HTTPS)" option in your browser.

-Try `goodbyedpi -1` to see if it works too.
+* **Chrome**: Settings → [Privacy and security](chrome://settings/security) > Use secure DNS → With: NextDNS
+* **Firefox**: [Settings](about:preferences) → Network Settings → Enable DNS over HTTPS → Use provider: NextDNS

-Then try `goodbyedpi.exe -2`. It should be faster for HTTPS sites. Mode `-3` speed ups HTTP websites.
+Then run the `goodbyedpi.exe` executable without any options. If it works — congratulations! You can use it as-is or configure further, for example by using `--blacklist` option if the list of blocked websites is known and available for your country.

-Use `goodbyedpi.exe -4` if it works for your ISP's DPI. This is the fastest mode but not compatible with every DPI.
+If your provider intercepts DNS requests, you may want to use `--dns-addr` option to a public DNS resover running on non-standard port (such as Yandex DNS `77.88.8.8:1253`) or configure DNS over HTTPS/TLS using third-party applications.
+
+Check the .cmd scripts and modify it according to your preference and network conditions.

 # How does it work

@@ -56,7 +79,7 @@ Most Passive DPI send HTTP 302 Redirect if you try to access blocked website ove

 ### Active DPI

-Active DPI is more tricky to fool. Currently the software uses 6 methods to circumvent Active DPI:
+Active DPI is more tricky to fool. Currently the software uses 7 methods to circumvent Active DPI:

 * TCP-level fragmentation for first data packet
 * TCP-level fragmentation for persistent (keep-alive) HTTP sessions
@@ -64,6 +87,7 @@ Active DPI is more tricky to fool. Currently the software uses 6 methods to circ
 * Removing space between header name and value in `Host` header
 * Adding additional space between HTTP Method (GET, POST etc) and URI
 * Mixing case of Host header value
+* Sending fake HTTP/HTTPS packets with low Time-To-Live value, incorrect checksum or incorrect TCP Sequence/Acknowledgement numbers to fool DPI and prevent delivering them to the destination

 These methods should not break any website as they're fully compatible with TCP and HTTP standards, yet it's sufficient to prevent DPI data classification and to circumvent censorship. Additional space may break some websites, although it's acceptable by HTTP/1.1 specification (see 19.3 Tolerant Applications).

@@ -83,12 +107,24 @@ And for x86_64:

 # How to install as Windows Service

-Use `service_install_russia_blacklist.cmd`, `service_install_russia_blacklist_dnsredir.cmd` and `service_remove.cmd` scripts.  
+Check examples in `service_install_russia_blacklist.cmd`, `service_install_russia_blacklist_dnsredir.cmd` and `service_remove.cmd` scripts.
+
 Modify them according to your own needs.

+# Known issues
+
+* Horribly outdated Windows 7 installations are not able to load WinDivert driver due to missing support for SHA256 digital signatures. Install KB3033929 [x86](https://www.microsoft.com/en-us/download/details.aspx?id=46078)/[x64](https://www.microsoft.com/en-us/download/details.aspx?id=46148), or better, update the whole system using Windows Update.
+* ~~Some SSL/TLS stacks unable to process fragmented ClientHello packets, and HTTPS websites won't open. Bug: [#4](https://github.com/ValdikSS/GoodbyeDPI/issues/4), [#64](https://github.com/ValdikSS/GoodbyeDPI/issues/64).~~ Fragmentation issues are fixed in v0.1.7.
+* ~~ESET Antivirus is incompatible with WinDivert driver [#91](https://github.com/ValdikSS/GoodbyeDPI/issues/91). This is most probably antivirus bug, not WinDivert.~~
+
+
 # Similar projects

-[zapret](https://github.com/bol-van/zapret) by @bol-van (for Linux).
+- **[zapret](https://github.com/bol-van/zapret)** by @bol-van (for Linux).
+- **[Green Tunnel](https://github.com/SadeghHayeri/GreenTunnel)** by @SadeghHayeri (for MacOS, Linux and Windows).
+- **[DPITunnel](https://github.com/zhenyolka/DPITunnel)** by @zhenyolka (for Android).
+- **[PowerTunnel](https://github.com/krlvm/PowerTunnel)** by @krlvm (for Windows, MacOS and Linux).
+- **[PowerTunnel for Android](https://github.com/krlvm/PowerTunnel-Android)** by @krlvm (for Android).

 # Kudos

--- a/src/Makefile
+++ b/src/Makefile
@@ -9,21 +9,22 @@ MINGWLIB = /usr/x86_64-w64-mingw32/lib/
 TARGET = goodbyedpi.exe
 # Linking SSP does not work for some reason, the executable doesn't start.
 #LIBS = -L$(WINDIVERTLIBS) -Wl,-Bstatic -lssp -Wl,-Bdynamic -lWinDivert -lws2_32
-LIBS = -L$(WINDIVERTLIBS) -lWinDivert -lws2_32
+LIBS = -L$(WINDIVERTLIBS) -lWinDivert -lws2_32 -l:libssp.a
 CC = $(CPREFIX)gcc
 CCWINDRES = $(CPREFIX)windres
 CFLAGS = -std=c99 -pie -fPIE -pipe -I$(WINDIVERTHEADERS) -L$(WINDIVERTLIBS) \
-         -O2 -D_FORTIFY_SOURCE=2 \
-         -Wall -Wextra -Wpedantic -Wformat=2 -Wshadow -Wstrict-aliasing=1 -Werror=format-security \
+         -O2 -D_FORTIFY_SOURCE=2 -fstack-protector \
+         -Wall -Wextra -Wpedantic -Wformat=2 -Wno-format-nonliteral -Wshadow -Wstrict-aliasing=1 -Werror=format-security \
         -Wfloat-equal -Wcast-align -Wsign-conversion \
         #-fstack-protector-strong
-LDFLAGS = -Wl,-O1,-pie,--dynamicbase,--nxcompat,--sort-common,--as-needed \
+LDFLAGS = -fstack-protector -Wl,-O1,-pie,--dynamicbase,--nxcompat,--sort-common,--as-needed \
 -Wl,--image-base,0x140000000 -Wl,--disable-auto-image-base

 ifdef BIT64
 	LDFLAGS += -Wl,--high-entropy-va -Wl,--pic-executable,-e,mainCRTStartup
 else
-	LDFLAGS += -Wl,--pic-executable,-e,_mainCRTStartup
+	CFLAGS += -m32
+	LDFLAGS += -Wl,--pic-executable,-e,_mainCRTStartup -m32
 endif

 .PHONY: default all clean
--- a/src/blackwhitelist.c
+++ b/src/blackwhitelist.c
@@ -35,14 +35,11 @@ static int add_hostname(const char *host) {
    if (!host)
        return FALSE;

-    int host_len = strlen(host);
-
    blackwhitelist_record_t *tmp_record = malloc(sizeof(blackwhitelist_record_t));
-    char *host_c = malloc(host_len + 1);
+    char *host_c = NULL;

    if (!check_get_hostname(host)) {
-        strncpy(host_c, host, host_len);
-        host_c[host_len] = '\0';
+        host_c = strdup(host);
        tmp_record->host = host_c;
        HASH_ADD_KEYPTR(hh, blackwhitelist, tmp_record->host,
                        strlen(tmp_record->host), tmp_record);
@@ -51,7 +48,8 @@ static int add_hostname(const char *host) {
    }
    debug("Not added host %s\n", host);
    free(tmp_record);
-    free(host_c);
+    if (host_c)
+        free(host_c);
    return FALSE;
 }

@@ -84,7 +82,7 @@ int blackwhitelist_load_list(const char *filename) {
    return TRUE;
 }

-int blackwhitelist_check_hostname(const char *host_addr, int host_len) {
+int blackwhitelist_check_hostname(const char *host_addr, size_t host_len) {
    char current_host[HOST_MAXLEN + 1];
    char *tokenized_host = NULL;

--- a/src/blackwhitelist.h
+++ b/src/blackwhitelist.h
@@ -1,2 +1,2 @@
 int blackwhitelist_load_list(const char *filename);
-int blackwhitelist_check_hostname(const char *host_addr, int host_len);
+int blackwhitelist_check_hostname(const char *host_addr, size_t host_len);
--- a/src/dnsredir.c
+++ b/src/dnsredir.c
@@ -44,7 +44,7 @@ static time_t last_cleanup = 0;
 static udp_connrecord_t *conntrack = NULL;

 void flush_dns_cache() {
-    BOOL WINAPI (*DnsFlushResolverCache)();
+    long long int WINAPI (*DnsFlushResolverCache)();

    HMODULE dnsapi = LoadLibrary("dnsapi.dll");
    if (dnsapi == NULL)
@@ -53,7 +53,7 @@ void flush_dns_cache() {
        exit(EXIT_FAILURE);
    }

-    DnsFlushResolverCache = (void*)GetProcAddress(dnsapi, "DnsFlushResolverCache");
+    DnsFlushResolverCache = GetProcAddress(dnsapi, "DnsFlushResolverCache");
    if (DnsFlushResolverCache == NULL || !DnsFlushResolverCache())
        printf("Can't flush DNS cache!");
    FreeLibrary(dnsapi);
@@ -89,7 +89,7 @@ inline static void fill_data_from_key(uint8_t *is_ipv6, uint32_t srcip[4], uint1
 }

 inline static void construct_key(const uint32_t srcip[4], const uint16_t srcport,
-                                 char *key, int is_ipv6)
+                                 char *key, const uint8_t is_ipv6)
 {
    debug("Construct key enter\n");
    if (key) {
@@ -135,7 +135,7 @@ static int check_get_udp_conntrack_key(const char *key, udp_connrecord_t **connr

 static int add_udp_conntrack(const uint32_t srcip[4], const uint16_t srcport,
                             const uint32_t dstip[4], const uint16_t dstport,
-                             const int is_ipv6
+                             const uint8_t is_ipv6
                            )
 {
    if (!(srcip && srcport && dstip && dstport))
--- a/src/dnsredir.h
+++ b/src/dnsredir.h
@@ -1,3 +1,5 @@
+#ifndef _DNSREDIR_H
+#define _DNSREDIR_H
 #include <stdint.h>

 typedef struct conntrack_info {
@@ -34,3 +36,4 @@ int dns_handle_outgoing(const uint32_t srcip[4], const uint16_t srcport,

 void flush_dns_cache();
 int dns_is_dns_packet(const char *packet_data, const UINT packet_dataLen, const int outgoing);
+#endif
--- a/src/fakepackets.c
+++ b/src/fakepackets.c
@@ -0,0 +1,195 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <unistd.h>
+#include <in6addr.h>
+#include <ws2tcpip.h>
+#include "windivert.h"
+#include "goodbyedpi.h"
+
+static const unsigned char fake_http_request[] = "GET / HTTP/1.1\r\nHost: www.w3.org\r\n"
+                                                 "User-Agent: curl/7.65.3\r\nAccept: */*\r\n"
+                                                 "Accept-Encoding: deflate, gzip, br\r\n\r\n";
+static const unsigned char fake_https_request[] = {
+    0x16, 0x03, 0x01, 0x02, 0x00, 0x01, 0x00, 0x01, 0xfc, 0x03, 0x03, 0x9a, 0x8f, 0xa7, 0x6a, 0x5d,
+    0x57, 0xf3, 0x62, 0x19, 0xbe, 0x46, 0x82, 0x45, 0xe2, 0x59, 0x5c, 0xb4, 0x48, 0x31, 0x12, 0x15,
+    0x14, 0x79, 0x2c, 0xaa, 0xcd, 0xea, 0xda, 0xf0, 0xe1, 0xfd, 0xbb, 0x20, 0xf4, 0x83, 0x2a, 0x94,
+    0xf1, 0x48, 0x3b, 0x9d, 0xb6, 0x74, 0xba, 0x3c, 0x81, 0x63, 0xbc, 0x18, 0xcc, 0x14, 0x45, 0x57,
+    0x6c, 0x80, 0xf9, 0x25, 0xcf, 0x9c, 0x86, 0x60, 0x50, 0x31, 0x2e, 0xe9, 0x00, 0x22, 0x13, 0x01,
+    0x13, 0x03, 0x13, 0x02, 0xc0, 0x2b, 0xc0, 0x2f, 0xcc, 0xa9, 0xcc, 0xa8, 0xc0, 0x2c, 0xc0, 0x30,
+    0xc0, 0x0a, 0xc0, 0x09, 0xc0, 0x13, 0xc0, 0x14, 0x00, 0x33, 0x00, 0x39, 0x00, 0x2f, 0x00, 0x35,
+    0x01, 0x00, 0x01, 0x91, 0x00, 0x00, 0x00, 0x0f, 0x00, 0x0d, 0x00, 0x00, 0x0a, 0x77, 0x77, 0x77,
+    0x2e, 0x77, 0x33, 0x2e, 0x6f, 0x72, 0x67, 0x00, 0x17, 0x00, 0x00, 0xff, 0x01, 0x00, 0x01, 0x00,
+    0x00, 0x0a, 0x00, 0x0e, 0x00, 0x0c, 0x00, 0x1d, 0x00, 0x17, 0x00, 0x18, 0x00, 0x19, 0x01, 0x00,
+    0x01, 0x01, 0x00, 0x0b, 0x00, 0x02, 0x01, 0x00, 0x00, 0x23, 0x00, 0x00, 0x00, 0x10, 0x00, 0x0e,
+    0x00, 0x0c, 0x02, 0x68, 0x32, 0x08, 0x68, 0x74, 0x74, 0x70, 0x2f, 0x31, 0x2e, 0x31, 0x00, 0x05,
+    0x00, 0x05, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x33, 0x00, 0x6b, 0x00, 0x69, 0x00, 0x1d, 0x00,
+    0x20, 0xb0, 0xe4, 0xda, 0x34, 0xb4, 0x29, 0x8d, 0xd3, 0x5c, 0x70, 0xd3, 0xbe, 0xe8, 0xa7, 0x2a,
+    0x6b, 0xe4, 0x11, 0x19, 0x8b, 0x18, 0x9d, 0x83, 0x9a, 0x49, 0x7c, 0x83, 0x7f, 0xa9, 0x03, 0x8c,
+    0x3c, 0x00, 0x17, 0x00, 0x41, 0x04, 0x4c, 0x04, 0xa4, 0x71, 0x4c, 0x49, 0x75, 0x55, 0xd1, 0x18,
+    0x1e, 0x22, 0x62, 0x19, 0x53, 0x00, 0xde, 0x74, 0x2f, 0xb3, 0xde, 0x13, 0x54, 0xe6, 0x78, 0x07,
+    0x94, 0x55, 0x0e, 0xb2, 0x6c, 0xb0, 0x03, 0xee, 0x79, 0xa9, 0x96, 0x1e, 0x0e, 0x98, 0x17, 0x78,
+    0x24, 0x44, 0x0c, 0x88, 0x80, 0x06, 0x8b, 0xd4, 0x80, 0xbf, 0x67, 0x7c, 0x37, 0x6a, 0x5b, 0x46,
+    0x4c, 0xa7, 0x98, 0x6f, 0xb9, 0x22, 0x00, 0x2b, 0x00, 0x09, 0x08, 0x03, 0x04, 0x03, 0x03, 0x03,
+    0x02, 0x03, 0x01, 0x00, 0x0d, 0x00, 0x18, 0x00, 0x16, 0x04, 0x03, 0x05, 0x03, 0x06, 0x03, 0x08,
+    0x04, 0x08, 0x05, 0x08, 0x06, 0x04, 0x01, 0x05, 0x01, 0x06, 0x01, 0x02, 0x03, 0x02, 0x01, 0x00,
+    0x2d, 0x00, 0x02, 0x01, 0x01, 0x00, 0x1c, 0x00, 0x02, 0x40, 0x01, 0x00, 0x15, 0x00, 0x96, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00
+};
+
+static int send_fake_data(const HANDLE w_filter,
+                          const PWINDIVERT_ADDRESS addr,
+                          const char *pkt,
+                          const UINT packetLen,
+                          const BOOL is_ipv6,
+                          const BOOL is_https,
+                          const BYTE set_ttl,
+                          const BYTE set_checksum,
+                          const BYTE set_seq
+                         ) {
+    char packet_fake[MAX_PACKET_SIZE];
+    WINDIVERT_ADDRESS addr_new;
+    PVOID packet_data;
+    UINT packet_dataLen;
+    UINT packetLen_new;
+    PWINDIVERT_IPHDR ppIpHdr;
+    PWINDIVERT_IPV6HDR ppIpV6Hdr;
+    PWINDIVERT_TCPHDR ppTcpHdr;
+    unsigned const char *fake_request_data = is_https ? fake_https_request : fake_http_request;
+    UINT fake_request_size = is_https ? sizeof(fake_https_request) : sizeof(fake_http_request) - 1;
+
+    memcpy(&addr_new, addr, sizeof(WINDIVERT_ADDRESS));
+    memcpy(packet_fake, pkt, packetLen);
+
+    addr_new.PseudoTCPChecksum = 0;
+    addr_new.PseudoIPChecksum = 0;
+
+    if (!is_ipv6) {
+        // IPv4 TCP Data packet
+        if (!WinDivertHelperParsePacket(packet_fake, packetLen, &ppIpHdr,
+            NULL, NULL, NULL, &ppTcpHdr, NULL, &packet_data, &packet_dataLen))
+            return 1;
+    }
+    else {
+        // IPv6 TCP Data packet
+        if (!WinDivertHelperParsePacket(packet_fake, packetLen, NULL,
+            &ppIpV6Hdr, NULL, NULL, &ppTcpHdr, NULL, &packet_data, &packet_dataLen))
+            return 1;
+    }
+
+    if (packetLen + fake_request_size + 1 > MAX_PACKET_SIZE)
+        return 2;
+
+    memcpy(packet_data, fake_request_data, fake_request_size);
+    packetLen_new = packetLen - packet_dataLen + fake_request_size;
+
+    if (!is_ipv6) {
+        ppIpHdr->Length = htons(
+            ntohs(ppIpHdr->Length) -
+            packet_dataLen + fake_request_size
+        );
+
+        if (set_ttl)
+            ppIpHdr->TTL = set_ttl;
+    }
+    else {
+        ppIpV6Hdr->Length = htons(
+            ntohs(ppIpV6Hdr->Length) -
+            packet_dataLen + fake_request_size
+        );
+
+        if (set_ttl)
+            ppIpV6Hdr->HopLimit = set_ttl;
+    }
+
+    if (set_seq) {
+        // This is the smallest ACK drift Linux can't handle already, since at least v2.6.18.
+        // https://github.com/torvalds/linux/blob/v2.6.18/net/netfilter/nf_conntrack_proto_tcp.c#L395
+        ppTcpHdr->AckNum = htonl(ntohl(ppTcpHdr->AckNum) - 66000);
+        // This is just random, no specifics about this value.
+        ppTcpHdr->SeqNum = htonl(ntohl(ppTcpHdr->SeqNum) - 10000);
+    }
+
+    // Recalculate the checksum
+    WinDivertHelperCalcChecksums(packet_fake, packetLen_new, &addr_new, (UINT64)NULL);
+
+    if (set_checksum) {
+        // ...and damage it
+        ppTcpHdr->Checksum = htons(ntohs(ppTcpHdr->Checksum) - 1);
+    }
+    //printf("Pseudo checksum: %d\n", addr_new.PseudoTCPChecksum);
+
+    WinDivertSend(
+        w_filter, packet_fake,
+        packetLen_new,
+        &addr_new, NULL
+    );
+    debug("Fake packet: OK");
+
+    return 0;
+}
+
+static int send_fake_request(const HANDLE w_filter,
+                                  const PWINDIVERT_ADDRESS addr,
+                                  const char *pkt,
+                                  const UINT packetLen,
+                                  const BOOL is_ipv6,
+                                  const BOOL is_https,
+                                  const BYTE set_ttl,
+                                  const BYTE set_checksum,
+                                  const BYTE set_seq
+                                 ) {
+    if (set_ttl) {
+        send_fake_data(w_filter, addr, pkt, packetLen,
+                          is_ipv6, is_https,
+                          set_ttl, FALSE, FALSE);
+    }
+    if (set_checksum) {
+        send_fake_data(w_filter, addr, pkt, packetLen,
+                          is_ipv6, is_https,
+                          FALSE, set_checksum, FALSE);
+    }
+    if (set_seq) {
+        send_fake_data(w_filter, addr, pkt, packetLen,
+                          is_ipv6, is_https,
+                          FALSE, FALSE, set_seq);
+    }
+    return 0;
+}
+
+int send_fake_http_request(const HANDLE w_filter,
+                                  const PWINDIVERT_ADDRESS addr,
+                                  const char *pkt,
+                                  const UINT packetLen,
+                                  const BOOL is_ipv6,
+                                  const BYTE set_ttl,
+                                  const BYTE set_checksum,
+                                  const BYTE set_seq
+                                 ) {
+    return send_fake_request(w_filter, addr, pkt, packetLen,
+                          is_ipv6, FALSE,
+                          set_ttl, set_checksum, set_seq);
+}
+
+int send_fake_https_request(const HANDLE w_filter,
+                                   const PWINDIVERT_ADDRESS addr,
+                                   const char *pkt,
+                                   const UINT packetLen,
+                                   const BOOL is_ipv6,
+                                   const BYTE set_ttl,
+                                   const BYTE set_checksum,
+                                   const BYTE set_seq
+                                 ) {
+    return send_fake_request(w_filter, addr, pkt, packetLen,
+                          is_ipv6, TRUE,
+                          set_ttl, set_checksum, set_seq);
+}
--- a/src/fakepackets.h
+++ b/src/fakepackets.h
@@ -0,0 +1,18 @@
+int send_fake_http_request(const HANDLE w_filter,
+                                  const PWINDIVERT_ADDRESS addr,
+                                  const char *pkt,
+                                  const UINT packetLen,
+                                  const BOOL is_ipv6,
+                                  const BYTE set_ttl,
+                                  const BYTE set_checksum,
+                                  const BYTE set_seq
+                                 );
+int send_fake_https_request(const HANDLE w_filter,
+                                   const PWINDIVERT_ADDRESS addr,
+                                   const char *pkt,
+                                   const UINT packetLen,
+                                   const BOOL is_ipv6,
+                                   const BYTE set_ttl,
+                                   const BYTE set_checksum,
+                                   const BYTE set_seq
+                                 );
--- a/src/goodbyedpi.c
+++ b/src/goodbyedpi.c
@@ -16,15 +16,18 @@
 #include "utils/repl_str.h"
 #include "service.h"
 #include "dnsredir.h"
+#include "ttltrack.h"
 #include "blackwhitelist.h"
+#include "fakepackets.h"

 // My mingw installation does not load inet_pton definition for some reason
 WINSOCK_API_LINKAGE INT WSAAPI inet_pton(INT Family, LPCSTR pStringBuf, PVOID pAddr);

+#define GOODBYEDPI_VERSION "v0.1.8"
+
 #define die() do { sleep(20); exit(EXIT_FAILURE); } while (0)

 #define MAX_FILTERS 4
-#define MAX_PACKET_SIZE 9016

 #define DIVERT_NO_LOCALNETSv4_DST "(" \
                   "(ip.DstAddr < 127.0.0.1 or ip.DstAddr > 127.255.255.255) and " \
@@ -59,7 +62,7 @@ WINSOCK_API_LINKAGE INT WSAAPI inet_pton(INT Family, LPCSTR pStringBuf, PVOID pA
 /* #IPID# is a template to find&replace */
 #define IPID_TEMPLATE "#IPID#"
 #define FILTER_STRING_TEMPLATE \
-        "(tcp and " \
+        "(tcp and !impostor and !loopback and " \
        "((inbound and (" \
         "(" \
          "(" \
@@ -75,17 +78,14 @@ WINSOCK_API_LINKAGE INT WSAAPI inet_pton(INT Family, LPCSTR pStringBuf, PVOID pA
         "(" DIVERT_NO_LOCALNETSv4_DST " or " DIVERT_NO_LOCALNETSv6_DST "))" \
        "))"
 #define FILTER_PASSIVE_STRING_TEMPLATE "inbound and ip and tcp and " \
+        "!impostor and !loopback and " \
        "((ip.Id <= 0xF and ip.Id >= 0x0) " IPID_TEMPLATE ") and " \
        "(tcp.SrcPort == 443 or tcp.SrcPort == 80) and tcp.Rst and " \
        DIVERT_NO_LOCALNETSv4_SRC

 #define SET_HTTP_FRAGMENT_SIZE_OPTION(fragment_size) do { \
    if (!http_fragment_size) { \
-        if (fragment_size <= 0 || fragment_size > 65535) { \
-            puts("Fragment size should be in range [0 - 65535]\n"); \
-            exit(EXIT_FAILURE); \
-        } \
-        http_fragment_size = fragment_size; \
+        http_fragment_size = (unsigned int)fragment_size; \
    } \
    else if (http_fragment_size != (unsigned int)fragment_size) { \
        printf( \
@@ -95,16 +95,33 @@ WINSOCK_API_LINKAGE INT WSAAPI inet_pton(INT Family, LPCSTR pStringBuf, PVOID pA
    } \
 } while (0)

+#define TCP_HANDLE_OUTGOING_ADJUST_TTL() do { \
+    if ((packet_v4 && tcp_handle_outgoing(&ppIpHdr->SrcAddr, &ppIpHdr->DstAddr, \
+                        ppTcpHdr->SrcPort, ppTcpHdr->DstPort, \
+                        &tcp_conn_info, 0)) \
+        || \
+        (packet_v6 && tcp_handle_outgoing(ppIpV6Hdr->SrcAddr, ppIpV6Hdr->DstAddr, \
+                        ppTcpHdr->SrcPort, ppTcpHdr->DstPort, \
+                        &tcp_conn_info, 1))) \
+    { \
+        ttl_of_fake_packet = tcp_get_auto_ttl(tcp_conn_info.ttl, do_auto_ttl); \
+        if (do_tcp_verb) { \
+            printf("Connection TTL = %d, Fake TTL = %d\n", tcp_conn_info.ttl, ttl_of_fake_packet); \
+        } \
+    } \
+} while (0)
+
 static int running_from_service = 0;
+static int exiting = 0;
 static HANDLE filters[MAX_FILTERS];
 static int filter_num = 0;
-static const char *http10_redirect_302 = "HTTP/1.0 302 ";
-static const char *http11_redirect_302 = "HTTP/1.1 302 ";
-static const char *http_host_find = "\r\nHost: ";
-static const char *http_host_replace = "\r\nhoSt: ";
-static const char *http_useragent_find = "\r\nUser-Agent: ";
-static const char *location_http = "\r\nLocation: http://";
-static const char *connection_close = "\r\nConnection: close";
+static const char http10_redirect_302[] = "HTTP/1.0 302 ";
+static const char http11_redirect_302[] = "HTTP/1.1 302 ";
+static const char http_host_find[] = "\r\nHost: ";
+static const char http_host_replace[] = "\r\nhoSt: ";
+static const char http_useragent_find[] = "\r\nUser-Agent: ";
+static const char location_http[] = "\r\nLocation: http://";
+static const char connection_close[] = "\r\nConnection: close";
 static const char *http_methods[] = {
    "GET ",
    "HEAD ",
@@ -124,6 +141,12 @@ static struct option long_options[] = {
    {"dns-verb",    no_argument,       0,  'v' },
    {"blacklist",   required_argument, 0,  'b' },
    {"ip-id",       required_argument, 0,  'i' },
+    {"set-ttl",     required_argument, 0,  '$' },
+    {"auto-ttl",    optional_argument, 0,  '+' },
+    {"wrong-chksum",no_argument,       0,  '%' },
+    {"wrong-seq",   no_argument,       0,  ')' },
+    {"native-frag", no_argument,       0,  '*' },
+    {"reverse-frag",no_argument,       0,  '(' },
    {0,             0,                 0,   0  }
 };

@@ -131,19 +154,21 @@ static char *filter_string = NULL;
 static char *filter_passive_string = NULL;

 static void add_filter_str(int proto, int port) {
-    const char *udp = " or (udp and (udp.SrcPort == %d or udp.DstPort == %d))";
-    const char *tcp = " or (tcp and (tcp.SrcPort == %d or tcp.DstPort == %d))";
+    const char *udp = " or (udp and !impostor and !loopback and " \
+                      "(udp.SrcPort == %d or udp.DstPort == %d))";
+    const char *tcp = " or (tcp and !impostor and !loopback and " \
+                      "(tcp.SrcPort == %d or tcp.DstPort == %d))";

    char *current_filter = filter_string;
-    int new_filter_size = strlen(current_filter) +
+    size_t new_filter_size = strlen(current_filter) +
            (proto == IPPROTO_UDP ? strlen(udp) : strlen(tcp)) + 16;
    char *new_filter = malloc(new_filter_size);

    strcpy(new_filter, current_filter);
    if (proto == IPPROTO_UDP)
-        sprintf(&(new_filter[strlen(new_filter)]), udp, port, port);
+        sprintf(new_filter + strlen(new_filter), udp, port, port);
    else
-        sprintf(&(new_filter[strlen(new_filter)]), tcp, port, port);
+        sprintf(new_filter + strlen(new_filter), tcp, port, port);

    filter_string = new_filter;
    free(current_filter);
@@ -177,10 +202,12 @@ static void finalize_filter_strings() {
    filter_passive_string = newstr;
 }

-static char* dumb_memmem(const char* haystack, int hlen, const char* needle, int nlen) {
+static char* dumb_memmem(const char* haystack, unsigned int hlen,
+                         const char* needle, size_t nlen)
+{
    // naive implementation
    if (nlen > hlen) return NULL;
-    int i;
+    size_t i;
    for (i=0; i<hlen-nlen+1; i++) {
        if (memcmp(haystack+i,needle,nlen)==0) {
            return (char*)(haystack+i);
@@ -189,6 +216,33 @@ static char* dumb_memmem(const char* haystack, int hlen, const char* needle, int
    return NULL;
 }

+unsigned short int atousi(const char *str, const char *msg) {
+    long unsigned int res = strtoul(str, NULL, 10u);
+    enum {
+        limitValue=0xFFFFu
+    };
+
+    if(res > limitValue) {
+        puts(msg);
+        exit(EXIT_FAILURE);
+    }
+    return (unsigned short int)res;
+}
+
+BYTE atoub(const char *str, const char *msg) {
+    long unsigned int res = strtoul(str, NULL, 10u);
+    enum {
+        limitValue=0xFFu
+    };
+
+    if(res > limitValue) {
+        puts(msg);
+        exit(EXIT_FAILURE);
+    }
+    return (BYTE)res;
+}
+
+
 static HANDLE init(char *filter, UINT64 flags) {
    LPTSTR errormessage = NULL;
    DWORD errorcode = 0;
@@ -230,43 +284,44 @@ void deinit_all() {
 }

 static void sigint_handler(int sig __attribute__((unused))) {
+    exiting = 1;
    deinit_all();
    exit(EXIT_SUCCESS);
 }

-static void mix_case(char *pktdata, int pktlen) {
-    int i;
+static void mix_case(char *pktdata, unsigned int pktlen) {
+    unsigned int i;

    if (pktlen <= 0) return;
    for (i = 0; i < pktlen; i++) {
        if (i % 2) {
-            pktdata[i] = toupper(pktdata[i]);
+            pktdata[i] = (char) toupper(pktdata[i]);
        }
    }
 }

-static int is_passivedpi_redirect(const char *pktdata, int pktlen) {
+static int is_passivedpi_redirect(const char *pktdata, unsigned int pktlen) {
    /* First check if this is HTTP 302 redirect */
-    if (memcmp(pktdata, http11_redirect_302, strlen(http11_redirect_302)) == 0 ||
-        memcmp(pktdata, http10_redirect_302, strlen(http10_redirect_302)) == 0)
+    if (memcmp(pktdata, http11_redirect_302, sizeof(http11_redirect_302)-1) == 0 ||
+        memcmp(pktdata, http10_redirect_302, sizeof(http10_redirect_302)-1) == 0)
    {
        /* Then check if this is a redirect to new http site with Connection: close */
-        if (dumb_memmem(pktdata, pktlen, location_http, strlen(location_http)) &&
-            dumb_memmem(pktdata, pktlen, connection_close, strlen(connection_close))) {
+        if (dumb_memmem(pktdata, pktlen, location_http, sizeof(location_http)-1) &&
+            dumb_memmem(pktdata, pktlen, connection_close, sizeof(connection_close)-1)) {
            return TRUE;
        }
    }
    return FALSE;
 }

-static int find_header_and_get_info(const char *pktdata, int pktlen,
+static int find_header_and_get_info(const char *pktdata, unsigned int pktlen,
                const char *hdrname,
                char **hdrnameaddr,
-                char **hdrvalueaddr, int *hdrvaluelen) {
+                char **hdrvalueaddr, unsigned int *hdrvaluelen) {
    char *data_addr_rn;
    char *hdr_begin;

-    *hdrvaluelen = 0;
+    *hdrvaluelen = 0u;
    *hdrnameaddr = NULL;
    *hdrvalueaddr = NULL;

@@ -274,32 +329,78 @@ static int find_header_and_get_info(const char *pktdata, int pktlen,
    hdr_begin = dumb_memmem(pktdata, pktlen,
                hdrname, strlen(hdrname));
    if (!hdr_begin) return FALSE;
-    if ((PVOID)pktdata > (PVOID)hdr_begin) return FALSE;
+    if (pktdata > hdr_begin) return FALSE;

    /* Set header address */
    *hdrnameaddr = hdr_begin;
-    *hdrvalueaddr = (PVOID)hdr_begin + strlen(hdrname);
+    *hdrvalueaddr = hdr_begin + strlen(hdrname);

    /* Search for header end (\r\n) */
    data_addr_rn = dumb_memmem(*hdrvalueaddr,
-                        pktlen - ((PVOID)*hdrvalueaddr - (PVOID)pktdata),
+                        pktlen - (*hdrvalueaddr - pktdata),
                        "\r\n", 2);
    if (data_addr_rn) {
-        *hdrvaluelen = (PVOID)data_addr_rn - (PVOID)*hdrvalueaddr;
-        if (*hdrvaluelen > 0 && *hdrvaluelen <= 512)
+        *hdrvaluelen = data_addr_rn - *hdrvalueaddr;
+        if (*hdrvaluelen > 0u && *hdrvaluelen <= 512u)
            return TRUE;
    }
    return FALSE;
 }

-static inline void change_window_size(const PWINDIVERT_TCPHDR ppTcpHdr, int size) {
-    if (size >= 1 && size <= 65535) {
-        ppTcpHdr->Window = htons(size);
+/**
+ * Very crude Server Name Indication (TLS ClientHello hostname) extractor.
+ */
+static int extract_sni(const char *pktdata, unsigned int pktlen,
+                    char **hostnameaddr, unsigned int *hostnamelen) {
+    uint32_t ptr = 0;
+    unsigned char *d = (unsigned char*)pktdata;
+    unsigned char *hnaddr = 0;
+    unsigned int hnlen = 0;
+
+    while (ptr + 8 < pktlen) {
+        /* Search for specific Extensions sequence */
+        if (d[ptr] == '\0' && d[ptr+1] == '\0' && d[ptr+2] == '\0' &&
+            d[ptr+4] == '\0' && d[ptr+6] == '\0' && d[ptr+7] == '\0' &&
+            /* Check Extension length, Server Name list length
+            *  and Server Name length relations
+            */
+            d[ptr+3] - d[ptr+5] == 2 && d[ptr+5] - d[ptr+8] == 3)
+            {
+                if (ptr + 8 + d[ptr+8] > pktlen) {
+                    return FALSE;
+                }
+                hnaddr = &d[ptr+9];
+                hnlen = d[ptr+8];
+                /* Limit hostname size up to 254 bytes */
+                if (hnlen < 2 || hnlen > 254) {
+                    return FALSE;
+                }
+                /* Validate that hostname has only ascii lowercase characters */
+                for (unsigned int i=0; i<hnlen; i++) {
+                    if (!( (hnaddr[i] >= '1' && hnaddr[i] <= '9') ||
+                         (hnaddr[i] >= 'a' && hnaddr[i] <= 'z') ||
+                         hnaddr[i] == '.'))
+                    {
+                        return FALSE;
+                    }
+                }
+                *hostnameaddr = (char*)hnaddr;
+                *hostnamelen = hnlen;
+                return TRUE;
+            }
+        ptr++;
+    }
+    return FALSE;
+}
+
+static inline void change_window_size(const PWINDIVERT_TCPHDR ppTcpHdr, unsigned int size) {
+    if (size >= 1 && size <= 0xFFFFu) {
+        ppTcpHdr->Window = htons((u_short)size);
    }
 }

 /* HTTP method end without trailing space */
-static PVOID find_http_method_end(const char *pkt, int http_frag, int *is_fragmented) {
+static PVOID find_http_method_end(const char *pkt, unsigned int http_frag, int *is_fragmented) {
    unsigned int i;
    for (i = 0; i<(sizeof(http_methods) / sizeof(*http_methods)); i++) {
        if (memcmp(pkt, http_methods[i], strlen(http_methods[i])) == 0) {
@@ -321,6 +422,72 @@ static PVOID find_http_method_end(const char *pkt, int http_frag, int *is_fragme
    return NULL;
 }

+/** Fragment and send the packet.
+ *
+ * This function cuts off the end of the packet (step=0) or
+ * the beginning of the packet (step=1) with fragment_size bytes.
+ */
+static void send_native_fragment(HANDLE w_filter, WINDIVERT_ADDRESS addr,
+                        char *packet, UINT packetLen, PVOID packet_data,
+                        UINT packet_dataLen, int packet_v4, int packet_v6,
+                        PWINDIVERT_IPHDR ppIpHdr, PWINDIVERT_IPV6HDR ppIpV6Hdr,
+                        PWINDIVERT_TCPHDR ppTcpHdr,
+                        unsigned int fragment_size, int step) {
+    char packet_bak[MAX_PACKET_SIZE];
+    memcpy(&packet_bak, packet, packetLen);
+    UINT orig_packetLen = packetLen;
+
+    if (step == 0) {
+        if (packet_v4)
+            ppIpHdr->Length = htons(
+                ntohs(ppIpHdr->Length) -
+                packet_dataLen + fragment_size
+            );
+        else if (packet_v6)
+            ppIpV6Hdr->Length = htons(
+                ntohs(ppIpV6Hdr->Length) -
+                packet_dataLen + fragment_size
+            );
+        //printf("step0 (%d:%d), pp:%d, was:%d, now:%d\n",
+        //                packet_v4, packet_v6, ntohs(ppIpHdr->Length),
+        //                packetLen, packetLen - packet_dataLen + fragment_size);
+        packetLen = packetLen - packet_dataLen + fragment_size;
+    }
+
+    else if (step == 1) {
+        if (packet_v4)
+            ppIpHdr->Length = htons(
+                ntohs(ppIpHdr->Length) - fragment_size
+            );
+        else if (packet_v6)
+            ppIpV6Hdr->Length = htons(
+                ntohs(ppIpV6Hdr->Length) - fragment_size
+            );
+        //printf("step1 (%d:%d), pp:%d, was:%d, now:%d\n", packet_v4, packet_v6, ntohs(ppIpHdr->Length),
+        //                packetLen, packetLen - fragment_size);
+        memmove(packet_data,
+                (char*)packet_data + fragment_size,
+                packet_dataLen - fragment_size);
+        packetLen -= fragment_size;
+
+        ppTcpHdr->SeqNum = htonl(ntohl(ppTcpHdr->SeqNum) + fragment_size);
+    }
+
+    addr.PseudoIPChecksum = 0;
+    addr.PseudoTCPChecksum = 0;
+
+    WinDivertHelperCalcChecksums(
+        packet, packetLen, &addr, 0
+    );
+    WinDivertSend(
+        w_filter, packet,
+        packetLen,
+        &addr, NULL
+    );
+    memcpy(packet, &packet_bak, orig_packetLen);
+    //printf("Sent native fragment of %d size (step%d)\n", packetLen, step);
+}
+
 int main(int argc, char *argv[]) {
    static enum packet_type_e {
        unknown,
@@ -341,6 +508,7 @@ int main(int argc, char *argv[]) {
    PWINDIVERT_TCPHDR ppTcpHdr;
    PWINDIVERT_UDPHDR ppUdpHdr;
    conntrack_info_t dns_conn_info;
+    tcp_conntrack_info_t tcp_conn_info;

    int do_passivedpi = 0, do_fragment_http = 0,
        do_fragment_http_persistent = 0,
@@ -350,20 +518,27 @@ int main(int argc, char *argv[]) {
        do_http_allports = 0,
        do_host_mixedcase = 0,
        do_dnsv4_redirect = 0, do_dnsv6_redirect = 0,
-        do_dns_verb = 0, do_blacklist = 0;
+        do_dns_verb = 0, do_tcp_verb = 0, do_blacklist = 0,
+        do_fake_packet = 0,
+        do_auto_ttl = 0,
+        do_wrong_chksum = 0,
+        do_wrong_seq = 0,
+        do_native_frag = 0, do_reverse_frag = 0;
    unsigned int http_fragment_size = 0;
    unsigned int https_fragment_size = 0;
+    unsigned int current_fragment_size = 0;
+    BYTE ttl_of_fake_packet = 0;
    uint32_t dnsv4_addr = 0;
    struct in6_addr dnsv6_addr = {0};
    struct in6_addr dns_temp_addr = {0};
    uint16_t dnsv4_port = htons(53);
    uint16_t dnsv6_port = htons(53);
    char *host_addr, *useragent_addr, *method_addr;
-    int host_len, useragent_len;
+    unsigned int host_len, useragent_len;
    int http_req_fragmented;

    char *hdr_name_addr = NULL, *hdr_value_addr = NULL;
-    int hdr_value_len;
+    unsigned int hdr_value_len;

    // Make sure to search DLLs only in safe path, not in current working dir.
    SetDllDirectory("");
@@ -393,20 +568,22 @@ int main(int argc, char *argv[]) {
        filter_passive_string = strdup(FILTER_PASSIVE_STRING_TEMPLATE);

    printf(
-        "GoodbyeDPI: Passive DPI blocker and Active DPI circumvention utility\n"
+        "GoodbyeDPI " GOODBYEDPI_VERSION
+        ": Passive DPI blocker and Active DPI circumvention utility\n"
        "https://github.com/ValdikSS/GoodbyeDPI\n\n"
    );

    if (argc == 1) {
-        /* enable mode -1 by default */
+        /* enable mode -5 by default */
+        do_fragment_http = do_fragment_https = 1;
+        do_reverse_frag = do_native_frag = 1;
        http_fragment_size = https_fragment_size = 2;
-        do_passivedpi = do_host = do_host_removespace \
-                = do_fragment_http = do_fragment_https \
-                = do_fragment_http_persistent \
-                = do_fragment_http_persistent_nowait = 1;
+        do_fragment_http_persistent = do_fragment_http_persistent_nowait = 1;
+        do_fake_packet = 1;
+        do_auto_ttl = 4;
    }

-    while ((opt = getopt_long(argc, argv, "1234prsaf:e:mwk:n", long_options, NULL)) != -1) {
+    while ((opt = getopt_long(argc, argv, "123456prsaf:e:mwk:n", long_options, NULL)) != -1) {
        switch (opt) {
            case '1':
                do_passivedpi = do_host = do_host_removespace \
@@ -419,16 +596,32 @@ int main(int argc, char *argv[]) {
                = do_fragment_http = do_fragment_https \
                = do_fragment_http_persistent \
                = do_fragment_http_persistent_nowait = 1;
-                https_fragment_size = 40;
+                https_fragment_size = 40u;
                break;
            case '3':
                do_passivedpi = do_host = do_host_removespace \
                = do_fragment_https = 1;
-                https_fragment_size = 40;
+                https_fragment_size = 40u;
                break;
            case '4':
                do_passivedpi = do_host = do_host_removespace = 1;
                break;
+            case '5':
+                do_fragment_http = do_fragment_https = 1;
+                do_reverse_frag = do_native_frag = 1;
+                http_fragment_size = https_fragment_size = 2;
+                do_fragment_http_persistent = do_fragment_http_persistent_nowait = 1;
+                do_fake_packet = 1;
+                do_auto_ttl = 4;
+                break;
+            case '6':
+                do_fragment_http = do_fragment_https = 1;
+                do_reverse_frag = do_native_frag = 1;
+                http_fragment_size = https_fragment_size = 2;
+                do_fragment_http_persistent = do_fragment_http_persistent_nowait = 1;
+                do_fake_packet = 1;
+                do_wrong_seq = 1;
+                break;
            case 'p':
                do_passivedpi = 1;
                break;
@@ -447,22 +640,21 @@ int main(int argc, char *argv[]) {
                break;
            case 'f':
                do_fragment_http = 1;
-                SET_HTTP_FRAGMENT_SIZE_OPTION(atoi(optarg));
+                SET_HTTP_FRAGMENT_SIZE_OPTION(atousi(optarg, "Fragment size should be in range [0 - 0xFFFF]\n"));
                break;
            case 'k':
                do_fragment_http_persistent = 1;
-                SET_HTTP_FRAGMENT_SIZE_OPTION(atoi(optarg));
+                do_native_frag = 1;
+                SET_HTTP_FRAGMENT_SIZE_OPTION(atousi(optarg, "Fragment size should be in range [0 - 0xFFFF]\n"));
                break;
            case 'n':
+                do_fragment_http_persistent = 1;
                do_fragment_http_persistent_nowait = 1;
+                do_native_frag = 1;
                break;
            case 'e':
                do_fragment_https = 1;
-                https_fragment_size = atoi(optarg);
-                if (https_fragment_size <= 0 || https_fragment_size > 65535) {
-                    puts("Fragment size should be in range [0 - 65535]\n");
-                    exit(EXIT_FAILURE);
-                }
+                https_fragment_size = atousi(optarg, "Fragment size should be in range [0 - 65535]\n");
                break;
            case 'w':
                do_http_allports = 1;
@@ -480,11 +672,7 @@ int main(int argc, char *argv[]) {
                break;
            case 'i':
                /* i is used as a temporary variable here */
-                i = atoi(optarg);
-                if (i < 0 || i > 65535) {
-                    printf("IP ID parameter error!\n");
-                    exit(EXIT_FAILURE);
-                }
+                i = atousi(optarg, "IP ID parameter error!\n");
                add_ip_id_str(i);
                i = 0;
                break;
@@ -527,11 +715,7 @@ int main(int argc, char *argv[]) {
                        "--dns-port");
                    exit(EXIT_FAILURE);
                }
-                dnsv4_port = atoi(optarg);
-                if (atoi(optarg) <= 0 || atoi(optarg) > 65535) {
-                    puts("DNS port parameter error!");
-                    exit(EXIT_FAILURE);
-                }
+                dnsv4_port = atousi(optarg, "DNS port parameter error!");
                if (dnsv4_port != 53) {
                    add_filter_str(IPPROTO_UDP, dnsv4_port);
                }
@@ -544,11 +728,7 @@ int main(int argc, char *argv[]) {
                        "--dnsv6-port");
                    exit(EXIT_FAILURE);
                }
-                dnsv6_port = atoi(optarg);
-                if (atoi(optarg) <= 0 || atoi(optarg) > 65535) {
-                    puts("DNS port parameter error!");
-                    exit(EXIT_FAILURE);
-                }
+                dnsv6_port = atousi(optarg, "DNS port parameter error!");
                if (dnsv6_port != 53) {
                    add_filter_str(IPPROTO_UDP, dnsv6_port);
                }
@@ -556,6 +736,7 @@ int main(int argc, char *argv[]) {
                break;
            case 'v':
                do_dns_verb = 1;
+                do_tcp_verb = 1;
                break;
            case 'b':
                do_blacklist = 1;
@@ -564,6 +745,38 @@ int main(int argc, char *argv[]) {
                    exit(EXIT_FAILURE);
                }
                break;
+            case '$':
+                do_fake_packet = 1;
+                ttl_of_fake_packet = atoub(optarg, "Set TTL parameter error!");
+                break;
+            case '+':
+                do_fake_packet = 1;
+                do_auto_ttl = 4;
+                if (optarg) {
+                    do_auto_ttl = atoub(optarg, "Set Auto TTL parameter error!");
+                } else if (argv[optind] && argv[optind][0] != '-') {
+                    do_auto_ttl = atoub(argv[optind], "Set Auto TTL parameter error!");
+                }
+                break;
+            case '%':
+                do_fake_packet = 1;
+                do_wrong_chksum = 1;
+                break;
+            case ')':
+                do_fake_packet = 1;
+                do_wrong_seq = 1;
+                break;
+            case '*':
+                do_native_frag = 1;
+                do_fragment_http_persistent = 1;
+                do_fragment_http_persistent_nowait = 1;
+                break;
+            case '(':
+                do_reverse_frag = 1;
+                do_native_frag = 1;
+                do_fragment_http_persistent = 1;
+                do_fragment_http_persistent_nowait = 1;
+                break;
            default:
                puts("Usage: goodbyedpi.exe [OPTION...]\n"
                " -p          block passive DPI\n"
@@ -571,25 +784,46 @@ int main(int argc, char *argv[]) {
                " -s          remove space between host header and its value\n"
                " -a          additional space between Method and Request-URI (enables -s, may break sites)\n"
                " -m          mix Host header case (test.com -> tEsT.cOm)\n"
-                " -f [value]  set HTTP fragmentation to value\n"
-                " -k [value]  enable HTTP persistent (keep-alive) fragmentation and set it to value\n"
+                " -f <value>  set HTTP fragmentation to value\n"
+                " -k <value>  enable HTTP persistent (keep-alive) fragmentation and set it to value\n"
                " -n          do not wait for first segment ACK when -k is enabled\n"
-                " -e [value]  set HTTPS fragmentation to value\n"
+                " -e <value>  set HTTPS fragmentation to value\n"
                " -w          try to find and parse HTTP traffic on all processed ports (not only on port 80)\n"
-                " --port        [value]    additional TCP port to perform fragmentation on (and HTTP tricks with -w)\n"
-                " --ip-id       [value]    handle additional IP ID (decimal, drop redirects and TCP RSTs with this ID).\n"
-                " --dns-addr    [value]    redirect UDPv4 DNS requests to the supplied IPv4 address (experimental)\n"
-                " --dns-port    [value]    redirect UDPv4 DNS requests to the supplied port (53 by default)\n"
-                " --dnsv6-addr  [value]    redirect UDPv6 DNS requests to the supplied IPv6 address (experimental)\n"
-                " --dnsv6-port  [value]    redirect UDPv6 DNS requests to the supplied port (53 by default)\n"
+                " --port        <value>    additional TCP port to perform fragmentation on (and HTTP tricks with -w)\n"
+                " --ip-id       <value>    handle additional IP ID (decimal, drop redirects and TCP RSTs with this ID).\n"
+                " --dns-addr    <value>    redirect UDPv4 DNS requests to the supplied IPv4 address (experimental)\n"
+                " --dns-port    <value>    redirect UDPv4 DNS requests to the supplied port (53 by default)\n"
+                " --dnsv6-addr  <value>    redirect UDPv6 DNS requests to the supplied IPv6 address (experimental)\n"
+                " --dnsv6-port  <value>    redirect UDPv6 DNS requests to the supplied port (53 by default)\n"
                " --dns-verb               print verbose DNS redirection messages\n"
-                " --blacklist   [txtfile]  perform HTTP tricks only to host names and subdomains from\n"
-                "                          supplied text file. This option can be supplied multiple times.\n"
+                " --blacklist   <txtfile>  perform circumvention tricks only to host names and subdomains from\n"
+                "                          supplied text file (HTTP Host/TLS SNI).\n"
+                "                          This option can be supplied multiple times.\n"
+                " --set-ttl     <value>    activate Fake Request Mode and send it with supplied TTL value.\n"
+                "                          DANGEROUS! May break websites in unexpected ways. Use with care.\n"
+                " --auto-ttl    [decttl]   activate Fake Request Mode, automatically detect TTL and decrease\n"
+                "                          it from standard 64 or 128 by decttl (128/64 - TTL - 4 by default).\n"
+                " --wrong-chksum           activate Fake Request Mode and send it with incorrect TCP checksum.\n"
+                "                          May not work in a VM or with some routers, but is safer than set-ttl.\n"
+                "                          Could be combined with --set-ttl\n"
+                " --wrong-seq              activate Fake Request Mode and send it with TCP SEQ/ACK in the past.\n"
+                " --native-frag            fragment (split) the packets by sending them in smaller packets, without\n"
+                "                          shrinking the Window Size. Works faster (does not slow down the connection)\n"
+                "                          and better.\n"
+                " --reverse-frag           fragment (split) the packets just as --native-frag, but send them in the\n"
+                "                          reversed order. Works with the websites which could not handle segmented\n"
+                "                          HTTPS TLS ClientHello (because they receive the TCP flow \"combined\").\n"
                "\n"
-                " -1          -p -r -s -f 2 -k 2 -n -e 2 (most compatible mode, default)\n"
+                "\n"
+                "LEGACY modesets:\n"
+                " -1          -p -r -s -f 2 -k 2 -n -e 2 (most compatible mode)\n"
                " -2          -p -r -s -f 2 -k 2 -n -e 40 (better speed for HTTPS yet still compatible)\n"
                " -3          -p -r -s -e 40 (better speed for HTTP and HTTPS)\n"
-                " -4          -p -r -s (best speed)");
+                " -4          -p -r -s (best speed)"
+                "\n"
+                "Modern modesets (more stable, more compatible, faster):\n"
+                " -5          -f 2 -e 2 --auto-ttl --reverse-frag (this is the default)\n"
+                " -6          -f 2 -e 2 --wrong-seq --reverse-frag\n");
                exit(EXIT_FAILURE);
        }
    }
@@ -599,20 +833,25 @@ int main(int argc, char *argv[]) {
    if (!https_fragment_size)
        https_fragment_size = 2;

-    printf("Block passive: %d, Fragment HTTP: %d, Fragment persistent HTTP: %d, "
-           "Fragment HTTPS: %d, "
-           "hoSt: %d, Host no space: %d, Additional space: %d, Mix Host: %d, "
-           "HTTP AllPorts: %d, HTTP Persistent Nowait: %d, DNS redirect: %d, "
-           "DNSv6 redirect: %d\n",
+    printf("Block passive: %d\nFragment HTTP: %d\nFragment persistent HTTP: %d\n"
+           "Fragment HTTPS: %d\nNative fragmentation (splitting): %d\n"
+           "Fragments sending in reverse: %d\n"
+           "hoSt: %d\nHost no space: %d\nAdditional space: %d\n"
+           "Mix Host: %d\nHTTP AllPorts: %d\nHTTP Persistent Nowait: %d\n"
+           "DNS redirect: %d\nDNSv6 redirect: %d\n"
+           "Fake requests, TTL: %hu (auto: %hu)\nFake requests, wrong checksum: %d\n"
+           "Fake requests, wrong SEQ/ACK: %d\n",
           do_passivedpi, (do_fragment_http ? http_fragment_size : 0),
           (do_fragment_http_persistent ? http_fragment_size : 0),
           (do_fragment_https ? https_fragment_size : 0),
+           do_native_frag, do_reverse_frag,
           do_host, do_host_removespace, do_additional_space, do_host_mixedcase,
           do_http_allports, do_fragment_http_persistent_nowait, do_dnsv4_redirect,
-           do_dnsv6_redirect
+           do_dnsv6_redirect, ttl_of_fake_packet, do_auto_ttl,
+           do_wrong_chksum, do_wrong_seq
          );

-    if (do_fragment_http && http_fragment_size > 2) {
+    if (do_fragment_http && http_fragment_size > 2 && !do_native_frag) {
        printf("WARNING: HTTP fragmentation values > 2 are not fully compatible "
               "with other options. Please use values <= 2 or disable HTTP fragmentation "
               "completely.\n");
@@ -723,15 +962,54 @@ int main(int argc, char *argv[]) {
                        }
                    }
                }
+                /* Handle OUTBOUND packet on port 443, search for something that resembles
+                 * TLS handshake, send fake request.
+                 */
+                else if (addr.Direction == WINDIVERT_DIRECTION_OUTBOUND &&
+                        ((do_fragment_https ? packet_dataLen == https_fragment_size : 0) ||
+                         packet_dataLen > 16) &&
+                         ppTcpHdr->DstPort != htons(80) &&
+                         (do_fake_packet || do_native_frag)
+                        )
+                {
+                    if (packet_dataLen >=2 && memcmp(packet_data, "\x16\x03", 2) == 0) {
+                        if (do_blacklist
+                            ? (extract_sni(packet_data, packet_dataLen,
+                                        &host_addr, &host_len) &&
+                              blackwhitelist_check_hostname(host_addr, host_len))
+                            : 1)
+                        {
+#ifdef DEBUG
+                            unsigned char lsni[256] = {0};
+                            extract_sni(packet_data, packet_dataLen,
+                                        &host_addr, &host_len);
+                            memcpy(&lsni, host_addr, host_len);
+                            printf("Blocked HTTPS website SNI: %s\n", lsni);
+#endif
+                            if (do_fake_packet) {
+                                if (do_auto_ttl) {
+                                    TCP_HANDLE_OUTGOING_ADJUST_TTL();
+                                }
+                                send_fake_https_request(w_filter, &addr, packet, packetLen, packet_v6,
+                                                        ttl_of_fake_packet, do_wrong_chksum, do_wrong_seq);
+                            }
+                            if (do_native_frag) {
+                                // Signal for native fragmentation code handler
+                                should_recalc_checksum = 1;
+                            }
+                        }
+                    }
+                }
                /* Handle OUTBOUND packet on port 80, search for Host header */
                else if (addr.Direction == WINDIVERT_DIRECTION_OUTBOUND && 
                        packet_dataLen > 16 &&
                        (do_http_allports ? 1 : (ppTcpHdr->DstPort == htons(80))) &&
                        find_http_method_end(packet_data,
-                                             (do_fragment_http ? http_fragment_size : 0),
+                                             (do_fragment_http ? http_fragment_size : 0u),
                                             &http_req_fragmented) &&
                        (do_host || do_host_removespace ||
-                        do_host_mixedcase || do_fragment_http_persistent))
+                        do_host_mixedcase || do_fragment_http_persistent ||
+                        do_fake_packet))
                {

                    /* Find Host header */
@@ -742,68 +1020,23 @@ int main(int argc, char *argv[]) {
                    {
                        host_addr = hdr_value_addr;
                        host_len = hdr_value_len;
+#ifdef DEBUG
+                        unsigned char lhost[256] = {0};
+                        memcpy(&lhost, host_addr, host_len);
+                        printf("Blocked HTTP website Host: %s\n", lhost);
+#endif

-                        /*
-                         * Handle new HTTP request in new
-                         * connection (when Window Size modification disabled)
-                         * or already established connection (keep-alive).
-                         * We split HTTP request into two packets: one of http_fragment_size length
-                         * and another of original_size - http_fragment_size length.
-                         *
-                         * The second packet of a splitted part is not really needed to be sent
-                         * as Windows understand that is hasn't been sent by checking
-                         * ack number of received packet and retransmitting missing part again,
-                         * but it's better to send it anyway since it eliminates one RTT.
-                         */
-                        if (do_fragment_http_persistent && !http_req_fragmented &&
-                            (packet_dataLen > http_fragment_size))
-                        {
-                            if (packet_v4)
-                                ppIpHdr->Length = htons(
-                                    ntohs(ppIpHdr->Length) -
-                                    packet_dataLen + http_fragment_size
-                                );
-                            else if (packet_v6)
-                                ppIpV6Hdr->Length = htons(
-                                    ntohs(ppIpV6Hdr->Length) -
-                                    packet_dataLen + http_fragment_size
-                                );
+                        if (do_native_frag) {
+                            // Signal for native fragmentation code handler
+                            should_recalc_checksum = 1;
+                        }

-                            WinDivertHelperCalcChecksums(
-                                packet, packetLen - packet_dataLen + http_fragment_size, &addr, 0
-                            );
-                            WinDivertSend(
-                                w_filter, packet,
-                                packetLen - packet_dataLen + http_fragment_size,
-                                &addr, NULL
-                            );
-
-                            if (do_fragment_http_persistent_nowait) {
-                                if (packet_v4)
-                                    ppIpHdr->Length = htons(
-                                        ntohs(ppIpHdr->Length) -
-                                        http_fragment_size + packet_dataLen - http_fragment_size
-                                    );
-                                else if (packet_v6)
-                                    ppIpV6Hdr->Length = htons(
-                                        ntohs(ppIpV6Hdr->Length) -
-                                        http_fragment_size + packet_dataLen - http_fragment_size
-                                    );
-                                memmove(packet_data,
-                                        packet_data + http_fragment_size,
-                                        packet_dataLen);
-                                packet_dataLen -= http_fragment_size;
-                                packetLen -= http_fragment_size;
-                                hdr_value_addr -= http_fragment_size;
-                                hdr_name_addr -= http_fragment_size;
-                                host_addr = hdr_value_addr;
-
-                                ppTcpHdr->SeqNum = htonl(ntohl(ppTcpHdr->SeqNum) + http_fragment_size);
-                                should_recalc_checksum = 1;
-                            }
-                            else {
-                                continue;
+                        if (do_fake_packet) {
+                            if (do_auto_ttl) {
+                                TCP_HANDLE_OUTGOING_ADJUST_TTL();
                            }
+                            send_fake_http_request(w_filter, &addr, packet, packetLen, packet_v6,
+                                                   ttl_of_fake_packet, do_wrong_chksum, do_wrong_seq);
                        }

                        if (do_host_mixedcase) {
@@ -828,7 +1061,7 @@ int main(int argc, char *argv[]) {

                            if (method_addr) {
                                memmove(method_addr + 1, method_addr,
-                                        (PVOID)host_addr - (PVOID)method_addr - 1);
+                                        (size_t)(host_addr - method_addr - 1));
                                should_recalc_checksum = 1;
                            }
                        }
@@ -856,10 +1089,10 @@ int main(int argc, char *argv[]) {
                                        * to the end of User-Agent
                                        */
                                        memmove(host_addr - 1, host_addr,
-                                                (PVOID)useragent_addr + useragent_len - (PVOID)host_addr);
+                                                (size_t)(useragent_addr + useragent_len - host_addr));
                                        host_addr -= 1;
                                        /* Put space in the end of User-Agent header */
-                                        *(char*)((PVOID)useragent_addr + useragent_len - 1) = ' ';
+                                        *(char*)((uint8_t*)useragent_addr + useragent_len - 1) = ' ';
                                        should_recalc_checksum = 1;
                                        //printf("Replaced Host header!\n");
                                    }
@@ -869,11 +1102,11 @@ int main(int argc, char *argv[]) {
                                        /* Move one byte to the RIGHT from the end of User-Agent
                                        * to the "Host:"
                                        */
-                                        memmove((PVOID)useragent_addr + useragent_len + 1,
-                                                (PVOID)useragent_addr + useragent_len,
-                                                (PVOID)host_addr - 1 - ((PVOID)useragent_addr + useragent_len));
+                                        memmove(useragent_addr + useragent_len + 1,
+                                                useragent_addr + useragent_len,
+                                                (size_t)(host_addr - 1 - (useragent_addr + useragent_len)));
                                        /* Put space in the end of User-Agent header */
-                                        *(char*)((PVOID)useragent_addr + useragent_len) = ' ';
+                                        *(char*)((uint8_t*)useragent_addr + useragent_len) = ' ';
                                        should_recalc_checksum = 1;
                                        //printf("Replaced Host header!\n");
                                    }
@@ -882,6 +1115,35 @@ int main(int argc, char *argv[]) {
                        } /* else if (do_host_removespace) */
                    } /* if (find_header_and_get_info http_host) */
                } /* Handle OUTBOUND packet with data */
+
+                /*
+                * should_recalc_checksum mean we have detected a packet to handle and
+                * modified it in some way.
+                * Handle native fragmentation here, incl. sending the packet.
+                */
+                if (should_reinject && should_recalc_checksum && do_native_frag)
+                {
+                    current_fragment_size = 0;
+                    if (do_fragment_http && ppTcpHdr->DstPort == htons(80)) {
+                        current_fragment_size = http_fragment_size;
+                    }
+                    else if (do_fragment_https && ppTcpHdr->DstPort != htons(80)) {
+                        current_fragment_size = https_fragment_size;
+                    }
+
+                    if (current_fragment_size) {
+                        send_native_fragment(w_filter, addr, packet, packetLen, packet_data,
+                                            packet_dataLen,packet_v4, packet_v6,
+                                            ppIpHdr, ppIpV6Hdr, ppTcpHdr,
+                                            current_fragment_size, do_reverse_frag);
+
+                        send_native_fragment(w_filter, addr, packet, packetLen, packet_data,
+                                            packet_dataLen,packet_v4, packet_v6,
+                                            ppIpHdr, ppIpV6Hdr, ppTcpHdr,
+                                            current_fragment_size, !do_reverse_frag);
+                        continue;
+                    }
+                }
            } /* Handle TCP packet with data */

            /* Else if we got TCP packet without data */
@@ -894,13 +1156,31 @@ int main(int argc, char *argv[]) {
                     * Window Size is changed even if do_fragment_http_persistent
                     * is enabled as there could be non-HTTP data on port 80
                     */
-                    if (do_fragment_http && ppTcpHdr->SrcPort == htons(80)) {
-                        change_window_size(ppTcpHdr, http_fragment_size);
-                        should_recalc_checksum = 1;
+
+                    if (do_fake_packet && do_auto_ttl) {
+                        if (!((packet_v4 && tcp_handle_incoming(&ppIpHdr->SrcAddr, &ppIpHdr->DstAddr,
+                                        ppTcpHdr->SrcPort, ppTcpHdr->DstPort,
+                                        0, ppIpHdr->TTL))
+                            ||
+                            (packet_v6 && tcp_handle_incoming((uint32_t*)&ppIpV6Hdr->SrcAddr,
+                                        (uint32_t*)&ppIpV6Hdr->DstAddr,
+                                        ppTcpHdr->SrcPort, ppTcpHdr->DstPort,
+                                        1, ppIpV6Hdr->HopLimit))))
+                        {
+                            if (do_tcp_verb)
+                                puts("[TCP WARN] Can't add TCP connection record.");
+                        }
                    }
-                    else if (do_fragment_https && ppTcpHdr->SrcPort != htons(80)) {
-                        change_window_size(ppTcpHdr, https_fragment_size);
-                        should_recalc_checksum = 1;
+
+                    if (!do_native_frag) {
+                        if (do_fragment_http && ppTcpHdr->SrcPort == htons(80)) {
+                            change_window_size(ppTcpHdr, http_fragment_size);
+                            should_recalc_checksum = 1;
+                        }
+                        else if (do_fragment_https && ppTcpHdr->SrcPort != htons(80)) {
+                            change_window_size(ppTcpHdr, https_fragment_size);
+                            should_recalc_checksum = 1;
+                        }
                    }
                }
            }
@@ -975,14 +1255,15 @@ int main(int argc, char *argv[]) {
            if (should_reinject) {
                //printf("Re-injecting!\n");
                if (should_recalc_checksum) {
-                    WinDivertHelperCalcChecksums(packet, packetLen, &addr, NULL);
+                    WinDivertHelperCalcChecksums(packet, packetLen, &addr, (UINT64)NULL);
                }
                WinDivertSend(w_filter, packet, packetLen, &addr, NULL);
            }
        }
        else {
            // error, ignore
-            printf("Error receiving packet!\n");
+            if (!exiting)
+                printf("Error receiving packet!\n");
            break;
        }
    }
--- a/src/goodbyedpi.h
+++ b/src/goodbyedpi.h
@@ -1,4 +1,5 @@
 #define HOST_MAXLEN 253
+#define MAX_PACKET_SIZE 9016

 #ifndef DEBUG
 #define debug(...) do {} while (0)
--- a/src/service.c
+++ b/src/service.c
@@ -30,7 +30,7 @@ int service_register(int argc, char *argv[])
     */
    if (!service_argc && !service_argv) {
        service_argc = argc;
-        service_argv = malloc(sizeof(void*) * argc);
+        service_argv = malloc(sizeof(void*) * (size_t)argc);
        for (i = 0; i < argc; i++) {
            service_argv[i] = strdup(argv[i]);
        }
@@ -71,7 +71,7 @@ void service_main(int argc __attribute__((unused)),
    SetServiceStatus(hStatus, &ServiceStatus);

    // Calling main with saved argc & argv
-    ServiceStatus.dwWin32ExitCode = main(service_argc, service_argv);
+    ServiceStatus.dwWin32ExitCode = (DWORD)main(service_argc, service_argv);
    ServiceStatus.dwCurrentState  = SERVICE_STOPPED;
    SetServiceStatus(hStatus, &ServiceStatus);
    return;
--- a/src/ttltrack.c
+++ b/src/ttltrack.c
@@ -0,0 +1,241 @@
+/**
+ * TCP (TTL) Connection Tracker for GoodbyeDPI
+ *
+ * Monitors SYN/ACK only, to extract the TTL value of the remote server.
+ *
+ */
+
+#include <windows.h>
+#include <time.h>
+#include <stdio.h>
+#include "goodbyedpi.h"
+#include "ttltrack.h"
+#include "utils/uthash.h"
+
+
+/* key ('4' for IPv4 or '6' for IPv6 + srcip[16] + dstip[16] + srcport[2] + dstport[2]) */
+#define TCP_CONNRECORD_KEY_LEN 37
+
+#define TCP_CLEANUP_INTERVAL_SEC 30
+
+/* HACK!
+ * uthash uses strlen() for HASH_FIND_STR.
+ * We have null bytes in our key, so we can't use strlen()
+ * And since it's always TCP_CONNRECORD_KEY_LEN bytes long,
+ * we don't need to use any string function to determine length.
+ */
+#undef uthash_strlen
+#define uthash_strlen(s) TCP_CONNRECORD_KEY_LEN
+
+typedef struct tcp_connrecord {
+    /* key ('4' for IPv4 or '6' for IPv6 + srcip[16] + dstip[16] + srcport[2] + dstport[2]) */
+    char key[TCP_CONNRECORD_KEY_LEN];
+    time_t time;         /* time when this record was added */
+    uint16_t ttl;
+    UT_hash_handle hh;   /* makes this structure hashable */
+} tcp_connrecord_t;
+
+static time_t last_cleanup = 0;
+static tcp_connrecord_t *conntrack = NULL;
+
+inline static void fill_key_data(char *key, const uint8_t is_ipv6, const uint32_t srcip[4],
+                    const uint32_t dstip[4], const uint16_t srcport, const uint16_t dstport)
+{
+    unsigned int offset = 0;
+
+    if (is_ipv6) {
+        *(uint8_t*)(key) = '6';
+        offset += sizeof(uint8_t);
+        ipv6_copy_addr((uint32_t*)(key + offset), srcip);
+        offset += sizeof(uint32_t) * 4;
+        ipv6_copy_addr((uint32_t*)(key + offset), dstip);
+        offset += sizeof(uint32_t) * 4;
+    }
+    else {
+        *(uint8_t*)(key) = '4';
+        offset += sizeof(uint8_t);
+        ipv4_copy_addr((uint32_t*)(key + offset), srcip);
+        offset += sizeof(uint32_t) * 4;
+        ipv4_copy_addr((uint32_t*)(key + offset), dstip);
+        offset += sizeof(uint32_t) * 4;
+    }
+
+    *(uint16_t*)(key + offset) = srcport;
+    offset += sizeof(srcport);
+    *(uint16_t*)(key + offset) = dstport;
+    offset += sizeof(dstport);
+}
+
+inline static void fill_data_from_key(uint8_t *is_ipv6, uint32_t srcip[4], uint32_t dstip[4],
+                                     uint16_t *srcport, uint16_t *dstport, const char *key)
+{
+    unsigned int offset = 0;
+
+    if (key[0] == '6') {
+        *is_ipv6 = 1;
+        offset += sizeof(uint8_t);
+        ipv6_copy_addr(srcip, (uint32_t*)(key + offset));
+        offset += sizeof(uint32_t) * 4;
+        ipv6_copy_addr(dstip, (uint32_t*)(key + offset));
+        offset += sizeof(uint32_t) * 4;
+    }
+    else {
+        *is_ipv6 = 0;
+        offset += sizeof(uint8_t);
+        ipv4_copy_addr(srcip, (uint32_t*)(key + offset));
+        offset += sizeof(uint32_t) * 4;
+        ipv4_copy_addr(dstip, (uint32_t*)(key + offset));
+        offset += sizeof(uint32_t) * 4;
+    }
+    *srcport = *(uint16_t*)(key + offset);
+    offset += sizeof(*srcport);
+    *dstport = *(uint16_t*)(key + offset);
+    offset += sizeof(*dstport);
+}
+
+inline static void construct_key(const uint32_t srcip[4], const uint32_t dstip[4],
+                                 const uint16_t srcport, const uint16_t dstport,
+                                 char *key, const uint8_t is_ipv6)
+{
+    debug("Construct key enter\n");
+    if (key) {
+        debug("Constructing key\n");
+        fill_key_data(key, is_ipv6, srcip, dstip, srcport, dstport);
+    }
+    debug("Construct key end\n");
+}
+
+inline static void deconstruct_key(const char *key, const tcp_connrecord_t *connrecord,
+                                   tcp_conntrack_info_t *conn_info)
+{
+    debug("Deconstruct key enter\n");
+    if (key && conn_info) {
+        debug("Deconstructing key\n");
+        fill_data_from_key(&conn_info->is_ipv6,
+                           conn_info->srcip, conn_info->dstip,
+                           &conn_info->srcport, &conn_info->dstport,
+                           key);
+
+        conn_info->ttl = connrecord->ttl;
+    }
+    debug("Deconstruct key end\n");
+}
+
+static int check_get_tcp_conntrack_key(const char *key, tcp_connrecord_t **connrecord) {
+    tcp_connrecord_t *tmp_connrecord = NULL;
+    if (!conntrack) return FALSE;
+
+    HASH_FIND_STR(conntrack, key, tmp_connrecord);
+    if (tmp_connrecord) {
+        if (connrecord)
+            *connrecord = tmp_connrecord;
+        debug("check_get_tcp_conntrack_key found key\n");
+        return TRUE;
+    }
+    debug("check_get_tcp_conntrack_key key not found\n");
+    return FALSE;
+}
+
+static int add_tcp_conntrack(const uint32_t srcip[4], const uint32_t dstip[4],
+                             const uint16_t srcport, const uint16_t dstport,
+                             const uint8_t is_ipv6, const uint8_t ttl
+                            )
+{
+    if (!(srcip && srcport && dstip && dstport))
+        return FALSE;
+
+    tcp_connrecord_t *tmp_connrecord = malloc(sizeof(tcp_connrecord_t));
+    construct_key(srcip, dstip, srcport, dstport, tmp_connrecord->key, is_ipv6);
+
+    if (!check_get_tcp_conntrack_key(tmp_connrecord->key, NULL)) {
+        tmp_connrecord->time = time(NULL);
+        tmp_connrecord->ttl = ttl;
+        HASH_ADD_STR(conntrack, key, tmp_connrecord);
+        debug("Added TCP conntrack %u:%hu - %u:%hu\n", srcip[0], ntohs(srcport), dstip[0], ntohs(dstport));
+        return TRUE;
+    }
+    debug("Not added TCP conntrack %u:%hu - %u:%hu\n", srcip[0], ntohs(srcport), dstip[0], ntohs(dstport));
+    free(tmp_connrecord);
+    return FALSE;
+}
+
+static void tcp_cleanup() {
+    tcp_connrecord_t *tmp_connrecord, *tmp_connrecord2 = NULL;
+
+    if (last_cleanup == 0) {
+        last_cleanup = time(NULL);
+        return;
+    }
+
+    if (difftime(time(NULL), last_cleanup) >= TCP_CLEANUP_INTERVAL_SEC) {
+        last_cleanup = time(NULL);
+
+        HASH_ITER(hh, conntrack, tmp_connrecord, tmp_connrecord2) {
+            if (difftime(last_cleanup, tmp_connrecord->time) >= TCP_CLEANUP_INTERVAL_SEC) {
+                HASH_DEL(conntrack, tmp_connrecord);
+                free(tmp_connrecord);
+            }
+        }
+    }
+}
+
+int tcp_handle_incoming(uint32_t srcip[4], uint32_t dstip[4],
+                        uint16_t srcport, uint16_t dstport,
+                        uint8_t is_ipv6, uint8_t ttl)
+{
+    tcp_cleanup();
+
+    debug("trying to add TCP srcport = %hu, dstport = %hu\n", ntohs(srcport), ntohs(dstport));
+    return add_tcp_conntrack(srcip, dstip, srcport, dstport, is_ipv6, ttl);
+
+    debug("____tcp_handle_incoming FALSE: srcport = %hu, dstport = %hu\n", ntohs(srcport), ntohs(dstport));
+    return FALSE;
+}
+
+int tcp_handle_outgoing(uint32_t srcip[4], uint32_t dstip[4],
+                        uint16_t srcport, uint16_t dstport,
+                        tcp_conntrack_info_t *conn_info,
+                        uint8_t is_ipv6)
+{
+    char key[TCP_CONNRECORD_KEY_LEN];
+    tcp_connrecord_t *tmp_connrecord = NULL;
+
+    if (!conn_info)
+        return FALSE;
+
+    tcp_cleanup();
+    construct_key(dstip, srcip, dstport, srcport, key, is_ipv6);
+    if (check_get_tcp_conntrack_key(key, &tmp_connrecord) && tmp_connrecord) {
+        /* Connection exists in conntrack, moving on */
+        deconstruct_key(key, tmp_connrecord, conn_info);
+        HASH_DEL(conntrack, tmp_connrecord);
+        free(tmp_connrecord);
+        debug("____tcp_handle_outgoing TRUE: srcport = %hu\n", ntohs(srcport));
+        return TRUE;
+    }
+
+    debug("____tcp_handle_outgoing FALSE: srcport = %hu\n", ntohs(srcport));
+    return FALSE;
+}
+
+int tcp_get_auto_ttl(const uint8_t ttl, const uint8_t decrease_for) {
+    uint8_t ttl_of_fake_packet = 0;
+
+    if (ttl > 98 && ttl < 128) {
+        /* Safekeeping */
+        if (128 - ttl > decrease_for + 1) {
+            ttl_of_fake_packet = 128 - ttl - decrease_for;
+        }
+    }
+    else if (ttl > 34 && ttl < 64) {
+        /* Safekeeping */
+        if (64 - ttl > decrease_for + 1) {
+            ttl_of_fake_packet = 64 - ttl - decrease_for;
+        }
+    }
+    else {
+        ttl_of_fake_packet = 0;
+    }
+
+    return ttl_of_fake_packet;
+}
--- a/src/ttltrack.h
+++ b/src/ttltrack.h
@@ -0,0 +1,25 @@
+#ifndef _TTLTRACK_H
+#define _TTLTRACK_H
+#include <stdint.h>
+#include "dnsredir.h"
+
+typedef struct tcp_conntrack_info {
+    uint8_t  is_ipv6;
+    uint8_t  ttl;
+    uint32_t srcip[4];
+    uint16_t srcport;
+    uint32_t dstip[4];
+    uint16_t dstport;
+} tcp_conntrack_info_t;
+
+int tcp_handle_incoming(uint32_t srcip[4], uint32_t dstip[4],
+                        uint16_t srcport, uint16_t dstport,
+                        uint8_t is_ipv6, uint8_t ttl);
+
+int tcp_handle_outgoing(uint32_t srcip[4], uint32_t dstip[4],
+                        uint16_t srcport, uint16_t dstport,
+                        tcp_conntrack_info_t *conn_info,
+                        uint8_t is_ipv6);
+
+int tcp_get_auto_ttl(uint8_t ttl, uint8_t decrease_for);
+#endif
--- a/src/utils/repl_str.c
+++ b/src/utils/repl_str.c
@@ -46,11 +46,11 @@ char *repl_str(const char *str, const char *from, const char *to) {
 			}
 		}

-		pos_cache[count-1] = pstr2 - str;
+		pos_cache[count-1] = (uintptr_t)(pstr2 - str);
 		pstr = pstr2 + fromlen;
 	}

-	orglen = pstr - str + strlen(pstr);
+	orglen = (size_t)(pstr - str) + strlen(pstr);

 	/* Allocate memory for the post-replacement string. */
 	if (count > 0) {
Author	SHA1	Message	Date
ValdikSS	6eec99e874	GoodbyeDPI v0.1.8	2021-12-26 20:29:24 +03:00
ValdikSS	b799b33fed	Update readme	2021-12-26 20:24:16 +03:00
ValdikSS	76c4658985	Update github issue templates	2021-12-26 20:10:18 +03:00
ValdikSS	d61a9f8022	Handle only (default_ttl - 30) range in Auto TTL	2021-12-26 19:05:03 +03:00
ValdikSS	fc15088c33	Fix spelling	2021-12-26 18:42:26 +03:00
ValdikSS	1ea70f9bc9	Do not print "Error receiving packet!" upon exiting	2021-12-26 18:39:44 +03:00
ValdikSS	ed42c5d627	Fix all the warnings and notes	2021-12-26 17:45:37 +03:00
ValdikSS	a79377f606	Github Actions: rebuild only on src directory changes	2021-12-26 15:12:13 +03:00
ValdikSS	db37b4f1f2	Add Github Actions build script	2021-12-26 15:03:35 +03:00
ValdikSS	9fcf097cb7	Use Auto TTL = 4 by default Previous value of 2 caused issues with the services connected via very different uplink/downlink routing links.	2021-12-25 20:43:56 +03:00
ValdikSS	e1e09f9103	Add safekeeping TTL value for Auto TTL	2021-12-25 13:56:57 +03:00
ValdikSS	a5c2f9fac9	Introduce -5 and -6 modes and make -5 default Modern modesets (more stable, more compatible, faster): -5 -f 2 -e 2 --auto-ttl --reverse-frag (this is the default now) -6 -f 2 -e 2 --wrong-seq --reverse-frag	2021-12-25 13:56:57 +03:00
ValdikSS	11c322aaed	Show fragmentation value issues only when Window Size is used	2021-12-25 13:07:39 +03:00
ValdikSS	88d4a60cdf	Merge branch 'badseq_for_master' into master	2021-12-25 12:30:08 +03:00
ValdikSS	b45b463d51	Update readme	2021-12-25 12:24:25 +03:00
ValdikSS	80fcd9c5cf	Replace required/optional brackets in the readme	2021-12-25 12:24:25 +03:00
ValdikSS	21ff80b43c	Automatic TTL value picker for --set-ttl Fake Packet mode This is a per-connection (per-destination) automatic TTL adjusting feature. Basically a --set-ttl mode where you don't need to set specific TTL value. It works as follows: 1. All incoming SYN/ACKs (the response to client's SYN) are intercepted 2. TTL value is extracted from SYN/ACK 3. New TTL is calculated with the simple formula: 128 > extracted_ttl > 64: // Server is running Windows fakepacket_ttl = 128 - extracted_ttl - decrement 64 > extracted_ttl > 34: // Server is running Linux/FreeBSD/other fakepacket_ttl = 64 - extracted_ttl - decrement 4. Fake packet is sent To comply with the multi-path multi-hop server connections where 1 hop dispersion is not rare, decrement should be at least of value "2", which is the default. The patch does not process "too strange" TTL values (bigger than 128, less than 34).	2021-12-25 12:24:25 +03:00
ValdikSS	bbb6af89fe	New Fake Packet circumvention method: wrong SEQ/ACK numbers This method sends Fake Packet with the TCP SEQ/ACK numbers "in the past": -66000 is used for ACK (right out of the ACK permissive window in Linux stack), -10000 is used for SEQ (without any reasoning). This method is pretty effective in Russia. It also could be handy in a networks which prohibit changing TTL values (mobile networks with tethering block/premium feature).	2021-12-25 11:55:26 +03:00
ValdikSS	b57a204d96	Apply each Fake Packet method to each packet separately Before: --set-ttl and --wrong-chksum generated single Fake Packet with both low TTL and incorrect checksum. Now: --set-ttl and --wrong-chksum generate two packets: one with low TTL, another with incorrect checksum.	2021-12-25 10:49:26 +03:00
ValdikSS	3899a719c1	Update Makefile, make fortify work on modern mingw compilers	2021-12-25 10:24:43 +03:00
ValdikSS	b9682ac222	Print parsed hostnames in DEBUG mode	2021-12-25 10:24:43 +03:00
ValdikSS	35c6e401db	Handle TLS SNI in blacklist option Now blacklist applies not only to HTTP websites, but also to HTTPS. Fixes #213	2021-12-25 10:23:43 +03:00
ValdikSS	cf7d1c69e0	Add TLS Server Name Indication (SNI) extractor	2021-12-25 10:09:37 +03:00
ValdikSS	5b79d8e8ba	Update Makefile, make fortify work on modern mingw compilers	2021-12-25 01:50:34 +03:00
ValdikSS	787c4d25c3	Update readme	2021-12-24 22:28:59 +03:00
ValdikSS	7d50748e2e	GoodbyeDPI version 0.1.7	2021-12-24 22:17:32 +03:00
ValdikSS	e28cb52645	Send native-fragged fragments in the reversed order Some websites (or more precisely, TLS terminators/balancers) can't handle segmented TLS ClientHello packet properly, requiring the whole ClientHello in a single segment, otherwise the connection gets dropped. However they still operate with a proper TCP stack. Cheat on them: send the latter segment first (with TCP SEQ "in the future"), the former segment second (with "current" SEQ), allowing OS TCP stack to combine it in a single TCP read(). This fixes long-standing number of TCP fragmentation issues: Fixes #4, #158, #224, #59, #192 and many others.	2021-12-24 22:07:07 +03:00
ValdikSS	e3638786da	Add Native Fragmentation support (without window size) This patch adds `--native-frag` option for userspace TCP segmentation (packet splitting), without shrinking TCP Window Size in SYN/ACK. Compared to Window Size shrinking, this method does not require waiting for ACK, which saves two RTTs. This is preferrable method of operation since it has no cons. It's faster and easier to handle in the software.	2021-12-24 21:36:43 +03:00
ValdikSS	ad60d30caa	Fix fake packet handling without other modifying parameters Fixes #150	2021-12-24 21:30:15 +03:00
ValdikSS	505b8bf516	Merge pull request #171 from msekmfb/master Add PowerTunnel for Android to similar projects	2020-03-08 14:38:40 +03:00
msekmfb	0c04f201eb	Add PowerTunnel for Android to similar projects	2020-03-08 11:11:35 +03:00
ValdikSS	19b777cdb2	Update README.md Add PowerTunnel (manual merge of #168)	2020-02-09 22:24:43 +03:00
ValdikSS	b69ab64d5d	Update README.md	2020-02-09 19:22:30 +03:00
ValdikSS	b5d75a6c8e	Version v0.1.6	2019-10-31 22:36:29 +03:00
ValdikSS	f2de8fce8d	Fake Request Mode	2019-10-31 22:36:12 +03:00
ValdikSS	2b3e4a4683	Merge pull request #135 from alisharifi76/master Add 'GreenTunnel' to 'Similar projects' section.	2019-04-03 01:33:02 +03:00
alisharifi76	7e2f782376	Add 'GreenTunnel' to 'Similar projects' section.	2019-03-29 22:32:05 +04:30
ValdikSS	7a0b8f5229	Update issue templates	2019-02-18 01:33:03 +03:00
ValdikSS	f569c64aca	Update issue templates	2019-02-18 01:25:06 +03:00
ValdikSS	5459181fca	Merge pull request #121 from drogga/patch-1 Update README.md	2019-01-31 15:29:18 +03:00
drogga	23485b67b4	Update README.md add KB3033929 download link for Windows 7 x64	2019-01-31 21:23:41 +09:00
KOLANICH	ff4c11a6eb	Integers fixes (with small modifications), closes #84 Signed-off-by: ValdikSS <iam@valdikss.org.ru>	2019-01-03 19:31:32 +03:00
ValdikSS	1c7fe5f843	Use newlines for current options information	2019-01-03 16:10:26 +03:00
ValdikSS	46db057662	Add version number into greeting message	2019-01-03 16:10:26 +03:00
ValdikSS	b95c45ee62	Update README.md	2018-10-14 18:24:36 +03:00
ValdikSS	39507e66e0	Update README.md	2018-07-24 15:54:55 +03:00
ValdikSS	c4d0ba1297	Skip impostor and loopback packets. Fixes #53 .	2018-07-24 15:49:50 +03:00
ValdikSS	d6c2b825aa	Update README.md	2018-07-20 16:37:19 +03:00