tap-bridge: Remove unused gateway option from tap-creator

CHANGES.md

@@ -28,6 +28,7 @@ This file is a best-effort approach to solving this issue; we will do our best b
 * (lr-wpan) ``LrWpanMac`` is now also aggregated to ``LrWpanNetDevice``.
 * (stats) Deprecated ns3::NaN and ns3::isNaN to use std::nan and std::isnan in their place
 * (tap-bridge) Deprecated "Gateway" attribute.
+* (tap-bridge) Removed unused gateway option from tap-creator.
 * (wifi) Added a new **ProtectedIfResponded** attribute to `FrameExchangeManager` to disable RTS/CTS protection for stations that have already responded to a frame requiring acknowledgment in the same TXOP, even if such frame had not been protected by RTS/CTS. The default value is true, even though it represents a change with respect to the previous behavior, because it is likely a more realistic choice.
 * (wifi) Deprecated setters/getters of the {Ht,Vht,He}Configuration classes that trivially set/get member variables, which have been made public and hence accessible to users.
 

src/tap-bridge/model/tap-creator.cc

@@ -189,12 +189,7 @@ SendSocket(const char* path, int fd)
 }
 
 static int
-CreateTap(const char* dev,
-          const char* gw,
-          const char* ip,
-          const char* mac,
-          const char* mode,
-          const char* netmask)
+CreateTap(const char* dev, const char* ip, const char* mac, const char* mode, const char* netmask)
 {
     //
     // Creation and management of Tap devices is done via the tun device
@@ -275,7 +270,6 @@ main(int argc, char* argv[])
 {
     int c;
     char* dev = (char*)"";
-    char* gw = nullptr;
     char* ip = nullptr;
     char* mac = nullptr;
     char* netmask = nullptr;
@@ -284,16 +278,13 @@ main(int argc, char* argv[])
 
     opterr = 0;
 
-    while ((c = getopt(argc, argv, "vd:g:i:m:n:o:p:")) != -1)
+    while ((c = getopt(argc, argv, "vd:i:m:n:o:p:")) != -1)
     {
         switch (c)
         {
         case 'd':
             dev = optarg; // name of the new tap device
             break;
-        case 'g':
-            gw = optarg; // gateway address for the new device
-            break;
         case 'i':
             ip = optarg; // ip address of the new device
             break;
@@ -323,14 +314,6 @@ main(int argc, char* argv[])
     //
     LOG("Provided Device Name is \"" << dev << "\"");
 
-    //
-    // We have got to be able to provide a gateway to the external Linux host
-    // so it can talk to the ns-3 network.  This ip address is provided in
-    // gw.
-    //
-    ABORT_IF(gw == nullptr, "Gateway Address is a required argument", 0);
-    LOG("Provided Gateway Address is \"" << gw << "\"");
-
     //
     // We have got to be able to assign an IP address to the tap device we are
     // allocating.  This address is allocated in the simulation and assigned to
@@ -385,7 +368,7 @@ main(int argc, char* argv[])
     // us to execute the following code:
     //
     LOG("Creating Tap");
-    int sock = CreateTap(dev, gw, ip, mac, operatingMode, netmask);
+    int sock = CreateTap(dev, ip, mac, operatingMode, netmask);
     ABORT_IF(sock == -1, "main(): Unable to create tap socket", 1);
 
     //