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putty-source/nullplug.c
Simon Tatham 96ec2c2500 Get rid of lots of implicit pointer types.
All the main backend structures - Ssh, Telnet, Pty, Serial etc - now
describe structure types themselves rather than pointers to them. The
same goes for the codebase-wide trait types Socket and Plug, and the
supporting types SockAddr and Pinger.

All those things that were typedefed as pointers are older types; the
newer ones have the explicit * at the point of use, because that's
what I now seem to be preferring. But whichever one of those is
better, inconsistently using a mixture of the two styles is worse, so
let's make everything consistent.

A few types are still implicitly pointers, such as Bignum and some of
the GSSAPI types; generally this is either because they have to be
void *, or because they're typedefed differently on different
platforms and aren't always pointers at all. Can't be helped. But I've
got rid of the main ones, at least.
2018-10-04 19:10:23 +01:00

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1.0 KiB
C

/*
* nullplug.c: provide a null implementation of the Plug vtable which
* ignores all calls. Occasionally useful in cases where we want to
* make a network connection just to see if it works, but not do
* anything with it afterwards except close it again.
*/
#include "putty.h"
static void nullplug_socket_log(Plug *plug, int type, SockAddr *addr, int port,
const char *error_msg, int error_code)
{
}
static void nullplug_closing(Plug *plug, const char *error_msg, int error_code,
int calling_back)
{
}
static void nullplug_receive(Plug *plug, int urgent, char *data, int len)
{
}
static void nullplug_sent(Plug *plug, int bufsize)
{
}
static const Plug_vtable nullplug_plugvt = {
nullplug_socket_log,
nullplug_closing,
nullplug_receive,
nullplug_sent,
NULL
};
static const Plug_vtable *nullplug_plugvt_ptr = &nullplug_plugvt;
/*
* There's a singleton instance of nullplug, because it's not
* interesting enough to worry about making more than one of them.
*/
Plug *nullplug = &nullplug_plugvt_ptr;