From 67d43beb08343e11ead9bd4c8dea37927942bce8 Mon Sep 17 00:00:00 2001
From: Vincent Bernat <vincent@bernat.im>
Date: Sat, 12 Apr 2014 12:11:21 +0200
Subject: [PATCH] osx: blacklist p2pX interfaces

They are related to AirDrop and transmitting anything on it will broke
the wireless network. This should fix #61.
---
 src/daemon/interfaces-bsd.c | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/src/daemon/interfaces-bsd.c b/src/daemon/interfaces-bsd.c
index fda887c2..03d80942 100644
--- a/src/daemon/interfaces-bsd.c
+++ b/src/daemon/interfaces-bsd.c
@@ -20,6 +20,7 @@
 #include <unistd.h>
 #include <ifaddrs.h>
 #include <errno.h>
+#include <ctype.h>
 #include <sys/param.h>
 #include <sys/sysctl.h>
 #include <sys/ioctl.h>
@@ -330,6 +331,32 @@ ifbsd_check_physical(struct lldpd *cfg,
 	iface->type |= IFACE_PHYSICAL_T;
 }
 
+/* Blacklist any dangerous interface. Currently, only p2p0 is blacklisted as it
+ * triggers some AirDrop functionality when we send something on it.
+ *  See: https://github.com/vincentbernat/lldpd/issues/61
+ */
+static void
+ifbsd_blacklist(struct lldpd *cfg,
+    struct interfaces_device_list *interfaces)
+{
+#ifdef HOST_OS_OSX
+	struct interfaces_device *iface = NULL;
+	TAILQ_FOREACH(iface, interfaces, next) {
+		int i;
+		if (strncmp(iface->name, "p2p", 3)) continue;
+		if (strlen(iface->name) < 4) continue;
+		for (i = 3;
+		     iface->name[i] != '\0' && isdigit(iface->name[i]);
+		     i++);
+		if (iface->name[i] == '\0') {
+			log_debug("interfaces", "skip %s: AirDrop interface",
+			    iface->name);
+			iface->flags = 0;
+		}
+	}
+#endif
+}
+
 static struct interfaces_device*
 ifbsd_extract_device(struct lldpd *cfg,
     struct ifaddrs *ifaddr)
@@ -616,6 +643,7 @@ interfaces_update(struct lldpd *cfg)
 		ifbsd_check_physical(cfg, interfaces, iface);
 	}
 
+	ifbsd_blacklist(cfg, interfaces);
 	interfaces_helper_whitelist(cfg, interfaces);
 	interfaces_helper_physical(cfg, interfaces,
 	    &bpf_ops, ifbpf_phys_init);
-- 
2.39.5