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a6139c1ad3
This isn't yet used, but I plan to use it in situations where you have to report errors by returning a valid Socket on which the client wlil call sk_socket_error, but in fact you notice the error _before_ instantiating your usual kind of Socket. The resulting Socket is usable for nothing except reading out the error string and closing it. [originally from svn r10065]
83 lines
1.6 KiB
C
83 lines
1.6 KiB
C
/*
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* A dummy Socket implementation which just holds an error message.
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*/
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#include <stdio.h>
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#include <assert.h>
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#define DEFINE_PLUG_METHOD_MACROS
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#include "tree234.h"
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#include "putty.h"
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#include "network.h"
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typedef struct Socket_error_tag *Error_Socket;
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struct Socket_error_tag {
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const struct socket_function_table *fn;
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/* the above variable absolutely *must* be the first in this structure */
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char *error;
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Plug plug;
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void *privptr;
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};
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static Plug sk_error_plug(Socket s, Plug p)
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{
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Error_Socket ps = (Error_Socket) s;
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Plug ret = ps->plug;
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if (p)
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ps->plug = p;
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return ret;
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}
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static void sk_error_close(Socket s)
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{
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Error_Socket ps = (Error_Socket) s;
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sfree(ps->error);
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sfree(ps);
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}
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static void sk_error_set_private_ptr(Socket s, void *ptr)
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{
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Error_Socket ps = (Error_Socket) s;
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ps->privptr = ptr;
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}
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static void *sk_error_get_private_ptr(Socket s)
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{
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Error_Socket ps = (Error_Socket) s;
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return ps->privptr;
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}
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static const char *sk_error_socket_error(Socket s)
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{
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Error_Socket ps = (Error_Socket) s;
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return ps->error;
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}
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Socket new_error_socket(const char *errmsg, Plug plug)
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{
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static const struct socket_function_table socket_fn_table = {
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sk_error_plug,
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sk_error_close,
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NULL /* write */,
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NULL /* write_oob */,
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NULL /* write_eof */,
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NULL /* flush */,
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sk_error_set_private_ptr,
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sk_error_get_private_ptr,
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NULL /* set_frozen */,
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sk_error_socket_error
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};
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Error_Socket ret;
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ret = snew(struct Socket_error_tag);
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ret->fn = &socket_fn_table;
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ret->plug = plug;
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ret->error = dupstr(errmsg);
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return (Socket) ret;
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}
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