Modify "qrenderdoc --targetcontrol" command

Modify "qrenderdoc --targetcontrol" to accept hostname or ipv4
address.

qrenderdoc/Code/qrenderdoc.cpp

@@ -219,34 +219,45 @@ int main(int argc, char *argv[])
 
   if(parser.isSet(targetcontrol))
   {
-    QRegularExpression regexp(lit("^([a-zA-Z0-9_-]+:)?([0-9]+)$"));
+    QRegularExpression regexp(lit("^([a-zA-Z\\.0-9_-]+)?(:([0-9]+))?$"));
 
     QRegularExpressionMatch match = regexp.match(parser.value(targetcontrol));
 
     if(!match.hasMatch())
     {
-      qCritical() << "--targetcontrol option must be followed by host:port";
+      qCritical() << "--targetcontrol option must be followed by host:port or host";
       return 1;
     }
 
     QString host = match.captured(1);
 
-    if(host.length() > 0 && host[host.length() - 1] == QLatin1Char(':'))
-      host.chop(1);
-
     bool ok = false;
-    uint32_t ident = match.captured(2).toUInt(&ok);
-
-    if(ok)
+    uint32_t ident = 0;
+    if(match.capturedLength(2) > 0)
     {
-      remoteHost = host;
-      remoteIdent = ident;
+      ident = match.captured(3).toUInt(&ok);
     }
     else
     {
-      qCritical() << "--targetcontrol parameter" << match.captured(1) << "malformed";
+      // no port specified, find the first open port.
+      ident = RENDERDOC_EnumerateRemoteTargets(host.toLocal8Bit().data(), ident);
+      ok = (ident != 0);
+    }
+
+    if(!ok)
+    {
+      if(match.capturedLength(2) > 0)
+      {
+        qCritical() << "--targetcontrol port " << match.captured(3) << "malformed";
+      }
+      else
+      {
+        qCritical() << "All ports are busy, cannot find an available port";
+      }
       return 1;
     }
+    remoteHost = host;
+    remoteIdent = ident;
   }
 
   QString crashReportPath;

renderdoc/os/posix/posix_network.cpp

@@ -425,7 +425,11 @@ Socket *CreateClientSocket(const char *host, uint16_t port, int timeoutMS)
   hints.ai_protocol = IPPROTO_TCP;
 
   addrinfo *addrResult = NULL;
-  getaddrinfo(host, portstr, &hints, &addrResult);
+  int res = getaddrinfo(host, portstr, &hints, &addrResult);
+  if(res != 0)
+  {
+    RDCDEBUG("%s", gai_strerror(res));
+  }
 
   for(addrinfo *ptr = addrResult; ptr != NULL; ptr = ptr->ai_next)
   {

renderdoc/os/win32/win32_network.cpp

@@ -66,6 +66,30 @@ static std::string wsaerr_string(int err)
       return "WSAEHOSTDOWN: A socket operation failed because the destination host was down.";
     case WSAEHOSTUNREACH:
       return "WSAETIMEDOUT: A socket operation was attempted to an unreachable host.";
+    case WSATRY_AGAIN: return "WSATRY_AGAIN: A temporary failure in name resolution occurred.";
+    case WSAEINVAL:
+      return "WSAEINVAL: An invalid value was provided for the ai_flags member of the pHints "
+             "parameter.";
+    case WSANO_RECOVERY:
+      return "WSANO_RECOVERY: A nonrecoverable failure in name resolution occurred.";
+    case WSAEAFNOSUPPORT:
+      return "WSAEAFNOSUPPORT: The ai_family member of the pHints parameter is not supported.";
+    case WSA_NOT_ENOUGH_MEMORY:
+      return "WSA_NOT_ENOUGH_MEMORY: A memory allocation failure occurred.";
+    case WSAHOST_NOT_FOUND:
+      return "WSAHOST_NOT_FOUND: The name does not resolve for the supplied parameters or the "
+             "pNodeName and pServiceName parameters were not provided.";
+    case WSATYPE_NOT_FOUND:
+      return "WSATYPE_NOT_FOUND: The pServiceName parameter is not supported for the specified "
+             "ai_socktype member of the pHints parameter.";
+    case WSAESOCKTNOSUPPORT:
+      return "WSAESOCKTNOSUPPORT: The ai_socktype member of the pHints parameter is not supported.";
+    case WSANO_DATA:
+      return "WSANO_DATA: The requested name is valid, but no data of the requested type was "
+             "found.";
+    case WSANOTINITIALISED:
+      return "WSANOTINITIALISED: A successful WSAStartup call must occur before using this "
+             "function.";
     default: break;
   }
 
@@ -386,7 +410,12 @@ Socket *CreateClientSocket(const char *host, uint16_t port, int timeoutMS)
   std::wstring whost = StringFormat::UTF82Wide(string(host));
 
   addrinfoW *addrResult = NULL;
-  GetAddrInfoW(whost.c_str(), portwstr, &hints, &addrResult);
+  int res = GetAddrInfoW(whost.c_str(), portwstr, &hints, &addrResult);
+  if(res != 0)
+  {
+    RDCDEBUG("%s", wsaerr_string(res).c_str());
+    return NULL;
+  }
 
   for(addrinfoW *ptr = addrResult; ptr != NULL; ptr = ptr->ai_next)
   {