Add manual Github Action trigger

README.md

@@ -43,7 +43,6 @@ Usage: goodbyedpi.exe [OPTION...]
                           supplied text file (HTTP Host/TLS SNI).
                           This option can be supplied multiple times.
  --allow-no-sni           perform circumvention if TLS SNI can't be detected with --blacklist enabled.
- --frag-by-sni            if SNI is detected in TLS packet, fragment the packet right before SNI value.
  --set-ttl     <value>    activate Fake Request Mode and send it with supplied TTL value.
                           DANGEROUS! May break websites in unexpected ways. Use with care (or --blacklist).
  --auto-ttl    [a1-a2-m]  activate Fake Request Mode, automatically detect TTL and decrease
@@ -141,16 +140,12 @@ Modify them according to your own needs.
 
 # Similar projects
 
-- **[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)
-- **[DPI Tunnel CLI](https://github.com/zhenyolka/DPITunnel-cli)** by @zhenyolka (for Linux and routers)
-- **[DPI Tunnel for Android](https://github.com/zhenyolka/DPITunnel-android)** 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)
+- **[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).
 - **[SpoofDPI](https://github.com/xvzc/SpoofDPI)** by @xvzc (for macOS and Linux)
-- **[GhosTCP](https://github.com/macronut/ghostcp)** by @macronut (for Windows)
-- **[ByeDPI](https://github.com/hufrea/byedpi)** for Linux/Windows + **[ByeDPIAndroid](https://github.com/dovecoteescapee/ByeDPIAndroid/)** for Android (no root)
-- **[Unicorn HTTPS](https://apps.apple.com/kr/app/unicorn-https/id1466584968?l=en)** for iOS
 
 # Kudos
 

src/Makefile

@@ -11,12 +11,7 @@ TARGET = goodbyedpi.exe
 #LIBS = -L$(WINDIVERTLIBS) -Wl,-Bstatic -lssp -Wl,-Bdynamic -lWinDivert -lws2_32
 LIBS = -L$(WINDIVERTLIBS) -lWinDivert -lws2_32 -l:libssp.a
 CC = $(CPREFIX)gcc
-
 CCWINDRES = $(CPREFIX)windres
-ifeq (, $(shell which $(CPREFIX)windres))
-	CCWINDRES = windres
-endif
-
 CFLAGS = -std=c99 -pie -fPIE -pipe -I$(WINDIVERTHEADERS) -L$(WINDIVERTLIBS) \
          -O2 -D_FORTIFY_SOURCE=2 -fstack-protector \
          -Wall -Wextra -Wpedantic -Wformat=2 -Wformat-overflow=2 -Wformat-truncation=2 \
@@ -24,7 +19,7 @@ CFLAGS = -std=c99 -pie -fPIE -pipe -I$(WINDIVERTHEADERS) -L$(WINDIVERTLIBS) \
          -Wnull-dereference -Warray-bounds=2 -Wimplicit-fallthrough=3 \
          -Wstringop-overflow=4 \
          -Wformat-signedness -Wstrict-overflow=2 -Wcast-align=strict \
-         -Wfloat-equal -Wcast-align -Wsign-conversion \
+         -Wfloat-equal -Wcast-align -Wsign-conversion -Wno-stringop-overflow -Wno-stringop-overread \
          #-fstack-protector-strong
 LDFLAGS = -fstack-protector -Wl,-O1,-pie,--dynamicbase,--nxcompat,--sort-common,--as-needed \
 -Wl,--image-base,0x140000000 -Wl,--disable-auto-image-base

src/goodbyedpi.c

@@ -162,7 +162,6 @@ static struct option long_options[] = {
     {"dns-verb",    no_argument,       0,  'v' },
     {"blacklist",   required_argument, 0,  'b' },
     {"allow-no-sni",no_argument,       0,  ']' },
-    {"frag-by-sni", no_argument,       0,  '>' },
     {"ip-id",       required_argument, 0,  'i' },
     {"set-ttl",     required_argument, 0,  '$' },
     {"min-ttl",     required_argument, 0,  '[' },
@@ -172,6 +171,7 @@ static struct option long_options[] = {
     {"native-frag", no_argument,       0,  '*' },
     {"reverse-frag",no_argument,       0,  '(' },
     {"max-payload", optional_argument, 0,  '|' },
+    {"openvpn",     no_argument,       0,  '#' },
     {0,             0,                 0,   0  }
 };
 
@@ -434,6 +434,16 @@ static int extract_sni(const char *pktdata, unsigned int pktlen,
     return FALSE;
 }
 
+static inline int is_openvpn_handshake(const char *pktdata, unsigned int pktlen) {
+    /*
+     * 0x38 is P_CONTROL_HARD_RESET_CLIENT_V2 + peer_id(0),
+     * 0x50 is P_CONTROL_HARD_RESET_CLIENT_V3 + peer_id(0)
+     */
+    return pktlen >= 16
+           && ntohs(((uint16_t*)pktdata)[0]) == pktlen - 2
+           && (pktdata[2] == '\x38' || pktdata[2] == '\x50');
+}
+
 static inline void change_window_size(const PWINDIVERT_TCPHDR ppTcpHdr, unsigned int size) {
     if (size >= 1 && size <= 0xFFFFu) {
         ppTcpHdr->Window = htons((u_short)size);
@@ -475,7 +485,7 @@ static void send_native_fragment(HANDLE w_filter, WINDIVERT_ADDRESS addr,
                         PWINDIVERT_TCPHDR ppTcpHdr,
                         unsigned int fragment_size, int step) {
     char packet_bak[MAX_PACKET_SIZE];
-    memcpy(packet_bak, packet, packetLen);
+    memcpy(&packet_bak, packet, packetLen);
     UINT orig_packetLen = packetLen;
 
     if (fragment_size >= packet_dataLen) {
@@ -532,7 +542,7 @@ static void send_native_fragment(HANDLE w_filter, WINDIVERT_ADDRESS addr,
         packetLen,
         NULL, &addr
     );
-    memcpy(packet, packet_bak, orig_packetLen);
+    memcpy(packet, &packet_bak, orig_packetLen);
     //printf("Sent native fragment of %d size (step%d)\n", packetLen, step);
 }
 
@@ -544,6 +554,7 @@ int main(int argc, char *argv[]) {
     } packet_type;
     int i, should_reinject, should_recalc_checksum = 0;
     int sni_ok = 0;
+    int openvpn_handshake = 0;
     int opt;
     int packet_v4, packet_v6;
     HANDLE w_filter = NULL;
@@ -569,8 +580,8 @@ int main(int argc, char *argv[]) {
         do_dnsv4_redirect = 0, do_dnsv6_redirect = 0,
         do_dns_verb = 0, do_tcp_verb = 0, do_blacklist = 0,
         do_allow_no_sni = 0,
-        do_fragment_by_sni = 0,
         do_fake_packet = 0,
+        do_openvpn = 0,
         do_auto_ttl = 0,
         do_wrong_chksum = 0,
         do_wrong_seq = 0,
@@ -808,9 +819,6 @@ int main(int argc, char *argv[]) {
             case ']': // --allow-no-sni
                 do_allow_no_sni = 1;
                 break;
-            case '>': // --frag-by-sni
-                do_fragment_by_sni = 1;
-                break;
             case '$': // --set-ttl
                 do_auto_ttl = auto_ttl_1 = auto_ttl_2 = auto_ttl_max = 0;
                 do_fake_packet = 1;
@@ -854,6 +862,9 @@ int main(int argc, char *argv[]) {
                     free(autottl_copy);
                 }
                 break;
+            case '#': // --openvpn
+                do_openvpn = 1;
+                break;
             case '%': // --wrong-chksum
                 do_fake_packet = 1;
                 do_wrong_chksum = 1;
@@ -904,7 +915,6 @@ int main(int argc, char *argv[]) {
                 "                          supplied text file (HTTP Host/TLS SNI).\n"
                 "                          This option can be supplied multiple times.\n"
                 " --allow-no-sni           perform circumvention if TLS SNI can't be detected with --blacklist enabled.\n"
-                " --frag-by-sni            if SNI is detected in TLS packet, fragment the packet right before SNI value.\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 (or --blacklist).\n"
                 " --auto-ttl    [a1-a2-m]  activate Fake Request Mode, automatically detect TTL and decrease\n"
@@ -930,6 +940,7 @@ int main(int argc, char *argv[]) {
                 "                          (like file transfers) in already established sessions.\n"
                 "                          May skip some huge HTTP requests from being processed.\n"
                 "                          Default (if set): --max-payload 1200.\n"
+                " --openvpn                Detect OpenVPN TCP and fragment/send fake packet.\n"
                 "\n");
                 puts("LEGACY modesets:\n"
                 " -1          -p -r -s -f 2 -k 2 -n -e 2 (most compatible mode)\n"
@@ -963,7 +974,6 @@ int main(int argc, char *argv[]) {
            "Fragment HTTP: %u\n"                    /* 2 */
            "Fragment persistent HTTP: %u\n"         /* 3 */
            "Fragment HTTPS: %u\n"                   /* 4 */
-           "Fragment by SNI: %u\n"                  /* 5 */
            "Native fragmentation (splitting): %d\n" /* 5 */
            "Fragments sending in reverse: %d\n"     /* 6 */
            "hoSt: %d\n"                             /* 7 */
@@ -978,29 +988,30 @@ int main(int argc, char *argv[]) {
            "Fake requests, TTL: %s (fixed: %hu, auto: %hu-%hu-%hu, min distance: %hu)\n"  /* 16 */
            "Fake requests, wrong checksum: %d\n"    /* 17 */
            "Fake requests, wrong SEQ/ACK: %d\n"     /* 18 */
-           "Max payload size: %hu\n",               /* 19 */
+           "Max payload size: %hu\n"                /* 19 */
+           "OpenVPN: %d\n",                         /* 20 */
            do_passivedpi,                                         /* 1 */
            (do_fragment_http ? http_fragment_size : 0),           /* 2 */
            (do_fragment_http_persistent ? http_fragment_size : 0),/* 3 */
            (do_fragment_https ? https_fragment_size : 0),         /* 4 */
-           do_fragment_by_sni,    /* 5 */
-           do_native_frag,        /* 6 */
-           do_reverse_frag,       /* 7 */
-           do_host,               /* 8 */
-           do_host_removespace,   /* 9 */
-           do_additional_space,   /* 10 */
-           do_host_mixedcase,     /* 11 */
-           do_http_allports,      /* 12 */
-           do_fragment_http_persistent_nowait, /* 13 */
-           do_dnsv4_redirect,                  /* 14 */
-           do_dnsv6_redirect,                  /* 15 */
-           do_allow_no_sni,                    /* 16 */
-           do_auto_ttl ? "auto" : (do_fake_packet ? "fixed" : "disabled"),  /* 17 */
+           do_native_frag,        /* 5 */
+           do_reverse_frag,       /* 6 */
+           do_host,               /* 7 */
+           do_host_removespace,   /* 8 */
+           do_additional_space,   /* 9 */
+           do_host_mixedcase,     /* 10 */
+           do_http_allports,      /* 11 */
+           do_fragment_http_persistent_nowait, /* 12 */
+           do_dnsv4_redirect,                  /* 13 */
+           do_dnsv6_redirect,                  /* 14 */
+           do_allow_no_sni,                    /* 15 */
+           do_auto_ttl ? "auto" : (do_fake_packet ? "fixed" : "disabled"),  /* 16 */
                ttl_of_fake_packet, do_auto_ttl ? auto_ttl_1 : 0, do_auto_ttl ? auto_ttl_2 : 0,
                do_auto_ttl ? auto_ttl_max : 0, ttl_min_nhops,
-           do_wrong_chksum, /* 18 */
-           do_wrong_seq,    /* 19 */
-           max_payload_size /* 20 */
+           do_wrong_chksum, /* 17 */
+           do_wrong_seq,    /* 18 */
+           max_payload_size, /* 19 */
+           do_openvpn        /* 20 */
           );
 
     if (do_fragment_http && http_fragment_size > 2 && !do_native_frag) {
@@ -1054,7 +1065,6 @@ int main(int argc, char *argv[]) {
                    packetLen);
             should_reinject = 1;
             should_recalc_checksum = 0;
-            sni_ok = 0;
 
             ppIpHdr = (PWINDIVERT_IPHDR)NULL;
             ppIpV6Hdr = (PWINDIVERT_IPV6HDR)NULL;
@@ -1128,7 +1138,7 @@ int main(int argc, char *argv[]) {
                  */
                 else if (addr.Outbound &&
                         ((do_fragment_https ? packet_dataLen == https_fragment_size : 0) ||
-                         packet_dataLen > 16) &&
+                         packet_dataLen >= 16) &&
                          ppTcpHdr->DstPort != htons(80) &&
                          (do_fake_packet || do_native_frag)
                         )
@@ -1138,9 +1148,11 @@ int main(int argc, char *argv[]) {
                      * But if the packet is more than 2 bytes, check ClientHello byte.
                     */
                     if ((packet_dataLen == 2 && memcmp(packet_data, "\x16\x03", 2) == 0) ||
-                        (packet_dataLen >= 3 && ( memcmp(packet_data, "\x16\x03\x01", 3) == 0 || memcmp(packet_data, "\x16\x03\x03", 3) == 0 )))
+                        (packet_dataLen >= 3 && memcmp(packet_data, "\x16\x03\x01", 3) == 0) ||
+                        (do_openvpn && (openvpn_handshake = is_openvpn_handshake(packet_data, packet_dataLen)))
+                       )
                     {
-                        if (do_blacklist || do_fragment_by_sni) {
+                        if (do_blacklist) {
                             sni_ok = extract_sni(packet_data, packet_dataLen,
                                         &host_addr, &host_len);
                         }
@@ -1149,6 +1161,7 @@ int main(int argc, char *argv[]) {
                               blackwhitelist_check_hostname(host_addr, host_len)
                              ) ||
                              (do_blacklist && !sni_ok && do_allow_no_sni) ||
+                             (do_openvpn && openvpn_handshake) ||
                              (!do_blacklist)
                            )
                         {
@@ -1156,7 +1169,7 @@ int main(int argc, char *argv[]) {
                             char lsni[HOST_MAXLEN + 1] = {0};
                             extract_sni(packet_data, packet_dataLen,
                                         &host_addr, &host_len);
-                            memcpy(lsni, host_addr, host_len);
+                            memcpy(&lsni, host_addr, host_len);
                             printf("Blocked HTTPS website SNI: %s\n", lsni);
 #endif
                             if (do_fake_packet) {
@@ -1191,7 +1204,7 @@ int main(int argc, char *argv[]) {
                         host_len = hdr_value_len;
 #ifdef DEBUG
                         char lhost[HOST_MAXLEN + 1] = {0};
-                        memcpy(lhost, host_addr, host_len);
+                        memcpy(&lhost, host_addr, host_len);
                         printf("Blocked HTTP website Host: %s\n", lhost);
 #endif
 
@@ -1293,11 +1306,7 @@ int main(int argc, char *argv[]) {
                         current_fragment_size = http_fragment_size;
                     }
                     else if (do_fragment_https && ppTcpHdr->DstPort != htons(80)) {
-                        if (do_fragment_by_sni && sni_ok) {
-                            current_fragment_size = (void*)host_addr - packet_data;
-                        } else {
-                            current_fragment_size = https_fragment_size;
-                        }
+                        current_fragment_size = https_fragment_size;
                     }
 
                     if (current_fragment_size) {