Author: Pekka Riikonen <priikone@silcnet.org>
- Copyright (C) 1997 - 2006 Pekka Riikonen
+ Copyright (C) 1997 - 2006, 2008 Pekka Riikonen
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
{
char pub[256], prv[256];
struct passwd *pw;
- bool ret;
+ SilcBool ret;
SILC_LOG_DEBUG(("Loading public and private keys"));
return ret;
}
+static SilcBool silc_keyboard_prompt_pending;
+
+typedef struct {
+ SilcAsyncOperation async_context;
+ SILC_KEYBOARD_PROMPT_PROC user_prompt_proc;
+ void *user_context;
+ SilcBool aborted;
+ SilcBool *immediate_completion;
+} *SilcKeyboardEntryRedirectContext;
+
+static void silc_keyboard_entry_redirect_abort(SilcAsyncOperation op,
+ void *context)
+{
+ SilcKeyboardEntryRedirectContext ctx = context;
+
+ /*
+ * Flag ourselves as aborted so the irssi callback doesn't do any real
+ * work here.
+ */
+ ctx->aborted = TRUE;
+
+ /*
+ * Call the user routine to notify it that we are aborting, so that it may
+ * clean up anything that needs cleaning up, e.g. references. The user
+ * may not reference the SilcAsyncOperation beyond this abort call. The
+ * recommended procedure is for the user prompt routine to null out its
+ * reference to the SilcAsyncOperation context. The underlying context
+ * structure will be released when the actual wrappered callback fires,
+ * though the wrappered callback will not call into user code now that
+ * the operation has been aborted.
+ */
+ ctx->user_prompt_proc(NULL, ctx->user_context, KeyboardCompletionAborted);
+}
+
+static void silc_keyboard_entry_redirect_completion(const char *line,
+ void *context)
+{
+ SilcKeyboardEntryRedirectContext ctx = context;
+
+ /*
+ * If we are aborted, then don't call the user routine. Note that we
+ * already notified the user that they were aborted when the abort
+ * call was made in the first place, so the user should not have any
+ * dangling references at this point.
+ *
+ * Otherwise, call the user routine.
+ */
+ if (!ctx->aborted) {
+ ctx->user_prompt_proc(line, ctx->user_context,
+ KeyboardCompletionSuccess);
+ }
+
+ /*
+ * If there's a flag to set on completion, such that we can detect when the
+ * operation finished immediately instead of being processed as a callback,
+ * then set that now.
+ */
+ if (ctx->immediate_completion)
+ *ctx->immediate_completion = TRUE;
+
+ /*
+ * Clean up our internal context structures. Note that we are considered
+ * responsible for handling the SilcAsyncOperation release in this model,
+ * unless we were aborted, in which case the abort request has released it.
+ */
+ if (!ctx->aborted)
+ silc_async_free(ctx->async_context);
+
+ silc_free(ctx);
+
+ /*
+ * Mark us as not having a keyboard prompt pending.
+ */
+ silc_keyboard_prompt_pending = FALSE;
+}
+
+/* Prompt for user input. */
+SilcBool silc_keyboard_entry_redirect(SILC_KEYBOARD_PROMPT_PROC prompt_func,
+ const char *entry,
+ int flags,
+ void *data,
+ SilcAsyncOperation *async)
+{
+ SilcKeyboardEntryRedirectContext ctx;
+ SilcBool completed_now;
+
+ /*
+ * Check if we already have a keyboard prompt pending. This sucks, but
+ * irssi stores the keyboard prompt data in a global, and if we request
+ * a prompt while there is already a prompt in progress, the old prompt
+ * data is leaked. If irssi gets its act together, this can (and should)
+ * go away.
+ */
+ if (silc_keyboard_prompt_pending) {
+ prompt_func(NULL, data, KeyboardCompletionFailed);
+ return FALSE;
+ }
+
+ /*
+ * Allocate our context blocks.
+ */
+ ctx = (SilcKeyboardEntryRedirectContext)silc_calloc(1, sizeof(*ctx));
+ if (!ctx) {
+ prompt_func(NULL, data, KeyboardCompletionFailed);
+ return FALSE;
+ }
+
+ ctx->async_context = silc_async_alloc(silc_keyboard_entry_redirect_abort,
+ NULL, ctx);
+ if (!ctx->async_context) {
+ silc_free(ctx);
+ prompt_func(NULL, data, KeyboardCompletionFailed);
+ return FALSE;
+ }
+
+ /*
+ * Initially, we don't consider ourselves as having finished.
+ */
+ completed_now = FALSE;
+
+ /*
+ * Since irssi can't handle overlapping keyboard prompt requests, block
+ * future requests until we are finished. N.B. This should really be
+ * handled inside of irssi, but this requires a breaking change to how
+ * keyboard callbacks are processed from an API perspective. A problem
+ * exists where another user could call a keyboard redirect request
+ * external to silc while we have one pending, and cause ours to get
+ * lost, in which case we will get stuck denying future prompt requests.
+ *
+ * Fortunately, nobody else seems to use keyboard prompt requests, at least
+ * not that I can tell.
+ */
+ silc_keyboard_prompt_pending = TRUE;
+
+ /*
+ * Set up the call to the irssi keyboard entry redirection facility.
+ */
+
+ ctx->user_prompt_proc = prompt_func;
+ ctx->user_context = data;
+ ctx->aborted = FALSE;
+ ctx->immediate_completion = &completed_now;
+
+ keyboard_entry_redirect((SIGNAL_FUNC)silc_keyboard_entry_redirect_completion,
+ entry, 0, ctx);
+
+ ctx->immediate_completion = NULL;
+
+ /*
+ * If we completed immediately, then there is nothing to return as the async
+ * context has already been released. In this case we have completed with a
+ * success status, but there is no SilcAsyncOperation context to return.
+ */
+ if (completed_now) {
+ *async = NULL;
+ return TRUE;
+ }
+
+ /*
+ * Otherwise, we must return an async operation context to the caller, and
+ * we must unset the immediate_completion flag as we don't want to be
+ * notified anymore since we're returning out. Note that this is not safe
+ * if keyboard_entry_redirect can call from a different thread, but we are
+ * assuming that it doesn't as there's already many other things that seem
+ * to make this assumption.
+ */
+ *async = ctx->async_context;
+
+ /*
+ * All done. Irssi will invoke the callback on this thread at a later point
+ * in time.
+ */
+ return TRUE;
+}
+
#ifdef SILC_PLUGIN
void create_key_passphrase(const char *answer, CREATE_KEY_REC *rec)
{
projects / silc.git / blobdiff