src/TortoisePlink/stubs/null-plug.c

   1 /*
   2  * nullplug.c: provide a null implementation of the Plug vtable which
   3  * ignores all calls. Occasionally useful in cases where we want to
   4  * make a network connection just to see if it works, but not do
   5  * anything with it afterwards except close it again.
   6  */
   7
   8 #include "putty.h"
   9
  10 void nullplug_log(Plug *plug, PlugLogType type, SockAddr *addr,
  11                   int port, const char *err_msg, int err_code)
  12 {
  13 }
  14
  15 void nullplug_closing(Plug *plug, PlugCloseType type, const char *error_msg)
  16 {
  17 }
  18
  19 void nullplug_receive(Plug *plug, int urgent, const char *data, size_t len)
  20 {
  21 }
  22
  23 void nullplug_sent(Plug *plug, size_t bufsize)
  24 {
  25 }
  26
  27 static const PlugVtable nullplug_plugvt = {
  28     .log = nullplug_log,
  29     .closing = nullplug_closing,
  30     .receive = nullplug_receive,
  31     .sent = nullplug_sent,
  32 };
  33
  34 static Plug nullplug_plug = { &nullplug_plugvt };
  35
  36 /*
  37  * There's a singleton instance of nullplug, because it's not
  38  * interesting enough to worry about making more than one of them.
  39  */
  40 Plug *const nullplug = &nullplug_plug;