Add a Socket implementation which just holds an error message.

[PuTTY.git] / errsock.c

diff --git a/errsock.c b/errsock.c
new file mode 100644 (file)
index 0000000..b71aa54
--- /dev/null
+++ b/errsock.c
@@ -0,0 +1,82 @@
+/*
+ * A dummy Socket implementation which just holds an error message.
+ */
+
+#include <stdio.h>
+#include <assert.h>
+
+#define DEFINE_PLUG_METHOD_MACROS
+#include "tree234.h"
+#include "putty.h"
+#include "network.h"
+
+typedef struct Socket_error_tag *Error_Socket;
+
+struct Socket_error_tag {
+    const struct socket_function_table *fn;
+    /* the above variable absolutely *must* be the first in this structure */
+
+    char *error;
+    Plug plug;
+    void *privptr;
+};
+
+static Plug sk_error_plug(Socket s, Plug p)
+{
+    Error_Socket ps = (Error_Socket) s;
+    Plug ret = ps->plug;
+    if (p)
+       ps->plug = p;
+    return ret;
+}
+
+static void sk_error_close(Socket s)
+{
+    Error_Socket ps = (Error_Socket) s;
+
+    sfree(ps->error);
+    sfree(ps);
+}
+
+static void sk_error_set_private_ptr(Socket s, void *ptr)
+{
+    Error_Socket ps = (Error_Socket) s;
+    ps->privptr = ptr;
+}
+
+static void *sk_error_get_private_ptr(Socket s)
+{
+    Error_Socket ps = (Error_Socket) s;
+    return ps->privptr;
+}
+
+static const char *sk_error_socket_error(Socket s)
+{
+    Error_Socket ps = (Error_Socket) s;
+    return ps->error;
+}
+
+Socket new_error_socket(const char *errmsg, Plug plug)
+{
+    static const struct socket_function_table socket_fn_table = {
+       sk_error_plug,
+       sk_error_close,
+       NULL /* write */,
+       NULL /* write_oob */,
+       NULL /* write_eof */,
+       NULL /* flush */,
+       sk_error_set_private_ptr,
+       sk_error_get_private_ptr,
+       NULL /* set_frozen */,
+       sk_error_socket_error
+    };
+
+    Error_Socket ret;
+
+    ret = snew(struct Socket_error_tag);
+    ret->fn = &socket_fn_table;
+    ret->plug = plug;
+    ret->error = dupstr(errmsg);
+
+    return (Socket) ret;
+}