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scd: New command DEVINFO.
* scd/app.c (notify_cond): New condition variable. (app_send_devinfo, app_wait): New. (scd_update_reader_status_file): Kick NOTIFY_COND. (initialize_module_command): Initialize NOTIFY_COND. * scd/command.c (struct server_local_s): Add watching_status. (cmd_devinfo): New. (register_commands): Add DEVINFO command. (send_client_notifications): Write status change to DEVINFO channel. * scd/scdaemon.h (app_wait, app_send_devinfo): New. GnuPG-bug-id: 4864 Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
This commit is contained in:
NIIBE Yutaka
parent
29f8f52bf8
commit
2ccbcfec12
55
scd/app.c
55
scd/app.c
@ -42,6 +42,9 @@ send_serialno_and_app_status (card_t card, int with_apps, ctrl_t ctrl);
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* applications. */
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static npth_mutex_t card_list_lock;
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/* Notification to threads which keep watching the status change. */
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static npth_cond_t notify_cond;
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/* A list of card contexts. A card is a collection of applications
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* (described by app_t) on the same physical token. */
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static card_t card_top;
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@ -280,6 +283,37 @@ app_dump_state (void)
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}
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gpg_error_t
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app_send_devinfo (ctrl_t ctrl)
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{
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card_t c;
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app_t a;
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int no_device;
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send_status_direct (ctrl, "DEVINFO_START", "");
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npth_mutex_lock (&card_list_lock);
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no_device = (card_top == NULL);
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for (c = card_top; c; c = c->next)
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{
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char *serialno;
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char card_info[80];
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serialno = card_get_serialno (c);
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snprintf (card_info, sizeof card_info, "DEVICE %s %s",
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strcardtype (c->cardtype), serialno);
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xfree (serialno);
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for (a = c->app; a; a = a->next)
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send_status_direct (ctrl, card_info, strapptype (a->apptype));
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}
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npth_mutex_unlock (&card_list_lock);
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send_status_direct (ctrl, "DEVINFO_END", "");
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return no_device ? gpg_error (GPG_ERR_NOT_FOUND): 0;
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}
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/* Check whether the application NAME is allowed. This does not mean
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we have support for it though. */
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static int
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@ -1934,6 +1968,7 @@ scd_update_reader_status_file (void)
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{
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card_t card, card_next;
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int periodical_check_needed = 0;
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int reported = 0;
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npth_mutex_lock (&card_list_lock);
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for (card = card_top; card; card = card_next)
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@ -1968,6 +2003,7 @@ scd_update_reader_status_file (void)
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{
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report_change (card->slot, card->card_status, status);
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send_client_notifications (card, status == 0);
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reported++;
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if (status == 0)
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{
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@ -1992,6 +2028,9 @@ scd_update_reader_status_file (void)
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}
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}
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if (reported)
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npth_cond_broadcast (¬ify_cond);
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npth_mutex_unlock (&card_list_lock);
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return periodical_check_needed;
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@ -2013,6 +2052,14 @@ initialize_module_command (void)
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return err;
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}
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err = npth_cond_init (¬ify_cond, NULL);
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if (err)
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{
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err = gpg_error_from_syserror ();
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log_error ("npth_cond_init failed: %s\n", gpg_strerror (err));
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return err;
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}
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return apdu_init ();
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}
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@ -2279,3 +2326,11 @@ app_do_with_keygrip (ctrl_t ctrl, int action, const char *keygrip_str,
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npth_mutex_unlock (&card_list_lock);
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return c;
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}
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void
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app_wait (void)
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{
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npth_mutex_lock (&card_list_lock);
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npth_cond_wait (¬ify_cond, &card_list_lock);
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npth_mutex_unlock (&card_list_lock);
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}
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206
scd/command.c
206
scd/command.c
@ -89,12 +89,14 @@ struct server_local_s
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/* True if the card has been removed and a reset is required to
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continue operation. */
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int card_removed;
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unsigned int card_removed:1;
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/* If set to true we will be terminate ourself at the end of the
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this session. */
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int stopme;
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unsigned int stopme:1;
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/* If set to true, status change will be reported. */
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unsigned int watching_status:1;
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};
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@ -2127,6 +2129,77 @@ send_keyinfo (ctrl_t ctrl, int data, const char *keygrip_str,
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}
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static const char hlp_devinfo[] =
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"DEVINFO [--watch]\n"
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"\n"
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"Return information about devices. If the option --watch is given,\n"
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"it keeps reporting status change until it detects no device is\n"
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"available."
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"The information is returned as a status line using the format:\n"
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"\n"
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" DEVICE <card_type> <serialno> <app_type>\n"
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"\n"
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"CARD_TYPE is the type of the card.\n"
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"\n"
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"SERIALNO is an ASCII string with the serial number of the\n"
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" smartcard. If the serial number is not known a single\n"
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" dash '-' is used instead.\n"
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"\n"
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"APP_TYPE is the type of the application.\n"
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"\n"
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"More information may be added in the future.";
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static gpg_error_t
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cmd_devinfo (assuan_context_t ctx, char *line)
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{
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ctrl_t ctrl = assuan_get_pointer (ctx);
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gpg_error_t err = 0;
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int watch = 0;
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if (has_option (line, "--watch"))
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{
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watch = 1;
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ctrl->server_local->watching_status = 1;
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}
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/* Firstly, send information of available devices. */
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err = app_send_devinfo (ctrl);
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/* If not watching, that's all. */
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if (!watch)
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return err;
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if (err && gpg_err_code (err) != GPG_ERR_NOT_FOUND)
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return err;
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/* Secondly, try to open device(s) available. */
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/* Clear the remove flag so that the open_card is able to reread it. */
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if (ctrl->server_local->card_removed)
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ctrl->server_local->card_removed = 0;
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if ((err = open_card (ctrl))
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&& gpg_err_code (err) != GPG_ERR_ENODEV)
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return err;
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err = 0;
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/* Remove reference(s) to the card. */
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ctrl->card_ctx = NULL;
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ctrl->current_apptype = APPTYPE_NONE;
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card_unref (ctrl->card_ctx);
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/* Then, keep watching the status change. */
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while (!err)
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{
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app_wait ();
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/* Send information of available devices. */
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err = app_send_devinfo (ctrl);
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}
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ctrl->server_local->watching_status = 0;
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return 0;
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}
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/* Return true if the command CMD implements the option OPT. */
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static int
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@ -2179,6 +2252,7 @@ register_commands (assuan_context_t ctx)
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{ "APDU", cmd_apdu, hlp_apdu },
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{ "KILLSCD", cmd_killscd, hlp_killscd },
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{ "KEYINFO", cmd_keyinfo, hlp_keyinfo },
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{ "DEVINFO", cmd_devinfo, hlp_devinfo },
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{ NULL }
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};
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int i, rc;
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@ -2671,76 +2745,86 @@ send_client_notifications (card_t card, int removal)
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struct server_local_s *sl;
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for (sl=session_list; sl; sl = sl->next_session)
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if (sl->ctrl_backlink && sl->ctrl_backlink->card_ctx == card)
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{
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pid_t pid;
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{
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if (sl->watching_status)
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{
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if (removal)
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assuan_write_status (sl->assuan_ctx, "DEVINFO_STATUS", "removal");
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else
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assuan_write_status (sl->assuan_ctx, "DEVINFO_STATUS", "new");
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}
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if (sl->ctrl_backlink && sl->ctrl_backlink->card_ctx == card)
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{
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pid_t pid;
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#ifdef HAVE_W32_SYSTEM
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HANDLE handle;
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HANDLE handle;
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#else
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int signo;
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int signo;
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#endif
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if (removal)
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{
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sl->ctrl_backlink->card_ctx = NULL;
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sl->ctrl_backlink->current_apptype = APPTYPE_NONE;
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sl->card_removed = 1;
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card_unref_locked (card);
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}
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if (removal)
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{
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sl->ctrl_backlink->card_ctx = NULL;
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sl->ctrl_backlink->current_apptype = APPTYPE_NONE;
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sl->card_removed = 1;
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card_unref_locked (card);
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}
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if (!sl->event_signal || !sl->assuan_ctx)
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continue;
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if (!sl->event_signal || !sl->assuan_ctx)
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continue;
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pid = assuan_get_pid (sl->assuan_ctx);
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pid = assuan_get_pid (sl->assuan_ctx);
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#ifdef HAVE_W32_SYSTEM
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handle = sl->event_signal;
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for (kidx=0; kidx < killidx; kidx++)
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if (killed[kidx].pid == pid
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&& killed[kidx].handle == handle)
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break;
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if (kidx < killidx)
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log_info ("event %p (%p) already triggered for client %d\n",
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sl->event_signal, handle, (int)pid);
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else
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{
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log_info ("triggering event %p (%p) for client %d\n",
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handle = sl->event_signal;
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for (kidx=0; kidx < killidx; kidx++)
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if (killed[kidx].pid == pid
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&& killed[kidx].handle == handle)
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break;
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if (kidx < killidx)
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log_info ("event %p (%p) already triggered for client %d\n",
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sl->event_signal, handle, (int)pid);
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if (!SetEvent (handle))
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log_error ("SetEvent(%p) failed: %s\n",
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sl->event_signal, w32_strerror (-1));
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if (killidx < DIM (killed))
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{
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killed[killidx].pid = pid;
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killed[killidx].handle = handle;
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killidx++;
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}
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}
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else
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{
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log_info ("triggering event %p (%p) for client %d\n",
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sl->event_signal, handle, (int)pid);
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if (!SetEvent (handle))
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log_error ("SetEvent(%p) failed: %s\n",
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sl->event_signal, w32_strerror (-1));
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if (killidx < DIM (killed))
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{
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killed[killidx].pid = pid;
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killed[killidx].handle = handle;
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killidx++;
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}
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}
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#else /*!HAVE_W32_SYSTEM*/
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signo = sl->event_signal;
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signo = sl->event_signal;
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if (pid != (pid_t)(-1) && pid && signo > 0)
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{
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for (kidx=0; kidx < killidx; kidx++)
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if (killed[kidx].pid == pid
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&& killed[kidx].signo == signo)
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break;
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if (kidx < killidx)
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log_info ("signal %d already sent to client %d\n",
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signo, (int)pid);
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else
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{
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log_info ("sending signal %d to client %d\n",
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if (pid != (pid_t)(-1) && pid && signo > 0)
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{
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for (kidx=0; kidx < killidx; kidx++)
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if (killed[kidx].pid == pid
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&& killed[kidx].signo == signo)
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break;
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if (kidx < killidx)
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log_info ("signal %d already sent to client %d\n",
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signo, (int)pid);
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kill (pid, signo);
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if (killidx < DIM (killed))
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{
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killed[killidx].pid = pid;
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killed[killidx].signo = signo;
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killidx++;
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}
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}
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}
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else
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{
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log_info ("sending signal %d to client %d\n",
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signo, (int)pid);
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kill (pid, signo);
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if (killidx < DIM (killed))
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{
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killed[killidx].pid = pid;
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killed[killidx].signo = signo;
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killidx++;
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}
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}
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}
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#endif /*!HAVE_W32_SYSTEM*/
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}
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}
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}
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}
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@ -153,5 +153,7 @@ int get_active_connection_count (void);
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/*-- app.c --*/
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int scd_update_reader_status_file (void);
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void app_wait (void);
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gpg_error_t app_send_devinfo (ctrl_t ctrl);
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#endif /*SCDAEMON_H*/
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