--fake-resend option: repeat sending each fake packet number of times

ValdikSS · Sep 14, 2024 · bc95b6f · bc95b6f
1 parent 985a09c
commit bc95b6f
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Showing 4 changed files with 25 additions and 5 deletions.
diff --git a/README.md b/README.md
@@ -69,6 +69,8 @@ Usage: goodbyedpi.exe [OPTION...]
                           would be sent on every request in the command line argument order.
  --fake-gen <value>       Generate random-filled fake packets for Fake Request Mode, value of them
                           (up to 30).
+ --fake-resend <value>    Send each fake packet value number of times.
+                          Default: 1 (send each packet once).
  --max-payload [value]    packets with TCP payload data more than [value] won't be processed.
                           Use this option to reduce CPU usage by skipping huge amount of data
                           (like file transfers) in already established sessions.

diff --git a/src/fakepackets.c b/src/fakepackets.c
@@ -16,6 +16,7 @@ struct fake_t {
 
 static struct fake_t *fakes[30] = {0};
 int fakes_count = 0;
+int fakes_resend = 1;
 
 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"
@@ -198,7 +199,8 @@ int send_fake_http_request(const HANDLE w_filter,
                                  ) {
     int ret = 0;
     for (int i=0; i<fakes_count || i == 0; i++) {
-        if (send_fake_request(w_filter, addr, pkt, packetLen,
+        for (int j=0; j<fakes_resend; j++)
+            if (send_fake_request(w_filter, addr, pkt, packetLen,
                             is_ipv6, FALSE,
                             set_ttl, set_checksum, set_seq,
                             fakes[i]))
@@ -220,7 +222,8 @@ int send_fake_https_request(const HANDLE w_filter,
                                  ) {
     int ret = 0;
     for (int i=0; i<fakes_count || i == 0; i++) {
-        if (send_fake_request(w_filter, addr, pkt, packetLen,
+        for (int j=0; j<fakes_resend; j++)
+            if (send_fake_request(w_filter, addr, pkt, packetLen,
                           is_ipv6, TRUE,
                           set_ttl, set_checksum, set_seq,
                           fakes[i]))

diff --git a/src/fakepackets.h b/src/fakepackets.h
@@ -1,4 +1,5 @@
 extern int fakes_count;
+extern int fakes_resend;
 int send_fake_http_request(const HANDLE w_filter,
                                   const PWINDIVERT_ADDRESS addr,
                                   const char *pkt,

diff --git a/src/goodbyedpi.c b/src/goodbyedpi.c
@@ -190,6 +190,7 @@ static struct option long_options[] = {
     {"max-payload", optional_argument, 0,  '|' },
     {"fake-from-hex", required_argument, 0,  'u' },
     {"fake-gen",    required_argument, 0,  'j' },
+    {"fake-resend", required_argument, 0,  't' },
     {"debug-exit",  optional_argument, 0,  'x' },
     {0,             0,                 0,   0  }
 };
@@ -952,6 +953,15 @@ int main(int argc, char *argv[]) {
                     puts("WARNING: fake generator has failed!");
                 }
                 break;
+            case 't': // --fake-resend
+                fakes_resend = atoub(optarg, "Fake resend parameter error!");
+                if (fakes_resend == 1)
+                    puts("WARNING: fake-resend is 1, no resending is in place!");
+                else if (!fakes_resend)
+                    puts("WARNING: fake-resend is 0, fake packet mode is disabled!");
+                else if (fakes_resend > 100)
+                    puts("WARNING: fake-resend value is a little too high, don't you think?");
+                break;
             case 'x': // --debug-exit
                 debug_exit = true;
                 break;
@@ -1005,6 +1015,8 @@ int main(int argc, char *argv[]) {
                 "                          would be sent on every request in the command line argument order.\n"
                 " --fake-gen <value>       Generate random-filled fake packets for Fake Request Mode, value of them\n"
                 "                          (up to 30).\n"
+                " --fake-resend <value>    Send each fake packet value number of times.\n"
+                "                          Default: 1 (send each packet once).\n"
                 " --max-payload [value]    packets with TCP payload data more than [value] won't be processed.\n"
                 "                          Use this option to reduce CPU usage by skipping huge amount of data\n"
                 "                          (like file transfers) in already established sessions.\n"
@@ -1065,7 +1077,8 @@ int main(int argc, char *argv[]) {
            "Fake requests, wrong checksum: %d\n"    /* 18 */
            "Fake requests, wrong SEQ/ACK: %d\n"     /* 19 */
            "Fake requests, custom payloads: %d\n"   /* 20 */
-           "Max payload size: %hu\n",               /* 21 */
+           "Fake requests, resend: %d\n"            /* 21 */
+           "Max payload size: %hu\n",               /* 22 */
            do_passivedpi, do_block_quic,                          /* 1 */
            (do_fragment_http ? http_fragment_size : 0),           /* 2 */
            (do_fragment_http_persistent ? http_fragment_size : 0),/* 3 */
@@ -1087,8 +1100,9 @@ int main(int argc, char *argv[]) {
                do_auto_ttl ? auto_ttl_max : 0, ttl_min_nhops,
            do_wrong_chksum, /* 18 */
            do_wrong_seq,    /* 19 */
-           fakes_count,    /* 20 */
-           max_payload_size /* 21 */
+           fakes_count,     /* 20 */
+           fakes_resend,    /* 21 */
+           max_payload_size /* 22 */
           );
 
     if (do_fragment_http && http_fragment_size > 2 && !do_native_frag) {