src/TortoisePlink/errsock.c

   1 /*
   2  * A dummy Socket implementation which just holds an error message.
   3  */
   4
   5 #include <stdio.h>
   6 #include <assert.h>
   7
   8 #define DEFINE_PLUG_METHOD_MACROS
   9 #include "tree234.h"
  10 #include "putty.h"
  11 #include "network.h"
  12
  13 typedef struct Socket_error_tag *Error_Socket;
  14
  15 struct Socket_error_tag {
  16     const struct socket_function_table *fn;
  17     /* the above variable absolutely *must* be the first in this structure */
  18
  19     char *error;
  20     Plug plug;
  21 };
  22
  23 static Plug sk_error_plug(Socket s, Plug p)
  24 {
  25     Error_Socket ps = (Error_Socket) s;
  26     Plug ret = ps->plug;
  27     if (p)
  28         ps->plug = p;
  29     return ret;
  30 }
  31
  32 static void sk_error_close(Socket s)
  33 {
  34     Error_Socket ps = (Error_Socket) s;
  35
  36     sfree(ps->error);
  37     sfree(ps);
  38 }
  39
  40 static const char *sk_error_socket_error(Socket s)
  41 {
  42     Error_Socket ps = (Error_Socket) s;
  43     return ps->error;
  44 }
  45
  46 static char *sk_error_peer_info(Socket s)
  47 {
  48     return NULL;
  49 }
  50
  51 Socket new_error_socket(const char *errmsg, Plug plug)
  52 {
  53     static const struct socket_function_table socket_fn_table = {
  54         sk_error_plug,
  55         sk_error_close,
  56         NULL /* write */,
  57         NULL /* write_oob */,
  58         NULL /* write_eof */,
  59         NULL /* flush */,
  60         NULL /* set_frozen */,
  61         sk_error_socket_error,
  62         sk_error_peer_info,
  63     };
  64
  65     Error_Socket ret;
  66
  67     ret = snew(struct Socket_error_tag);
  68     ret->fn = &socket_fn_table;
  69     ret->plug = plug;
  70     ret->error = dupstr(errmsg);
  71
  72     return (Socket) ret;
  73 }