Move the monitor-for-interface-list-changes stuff to the caputils library.

Change-Id: Ie0d4504688602c2aa8e9788643b079930ca7d305
Reviewed-on: https://code.wireshark.org/review/3076
Reviewed-by: Guy Harris <guy@alum.mit.edu>

1 files changed, 75 insertions, 0 deletions

diff --git a/caputils/iface_monitor.h b/caputils/iface_monitor.h
new file mode 100644
index 0000000000..d6269cf627
--- /dev/null
+++ b/caputils/iface_monitor.h
@@ -0,0 +1,75 @@
+/* iface_monitor.h
+ * interface monitor by Pontus Fuchs <pontus.fuchs@gmail.com>
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * 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 the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+#ifndef IFACE_MONITOR_H
+#define IFACE_MONITOR_H
+
+#ifdef HAVE_LIBPCAP
+
+/*
+ * Callback for interface changes.
+ *
+ * iface is a pointer to the name of the interface.
+ *
+ * up is 1 if the interface is up, 0 if it's down.
+ *
+ * XXX - we really want "gone", not "down", where "gone" may include
+ * "down" if the OS requires an interface to be up in order to start
+ * a capture on it (as is the case in Linux and in OS X prior to
+ * Lion), but should also include *gone*, as in "there is no longer
+ * an interface with this name, so it's neither down nor up".
+ *
+ * We also may want other events, such as address changes, so what
+ * we might want is "add", "remove", and "modify" as the events.
+ */
+typedef void (*iface_mon_cb)(const char *iface, int up);
+
+/*
+ * Start watching for interface changes.
+ */
+int
+iface_mon_start(iface_mon_cb cb);
+
+/*
+ * Stop watching for interface changes.
+ */
+void
+iface_mon_stop(void);
+
+/*
+ * Get the socket on which interface changes are delivered, so that
+ * we can add it to the event loop.
+ *
+ * XXX - what if it's not a socket or other file descriptor?
+ */
+int
+iface_mon_get_sock(void);
+
+/*
+ * Call this if something is readable from the interface change socket.
+ * It will call the callback as appropriate.
+ */
+void
+iface_mon_event(void);
+
+#endif /* HAVE_LIBPCAP */
+
+#endif /* IFACE_MONITOR_H */