Add a new address cache type called sticky. On an interface marked sticky any

address learned by the bridge is made permanent, the address will not age out
and most importantly will not migrate to another interface.

This can be used to stop mac address poisoning or clients roaming in much the
same way as static entries without the hassle of preloading the table.

1 files changed, 16 insertions, 0 deletions

diff --git a/sbin/ifconfig/ifbridge.c b/sbin/ifconfig/ifbridge.c
index 3f708b2c2eb8..1100aab26b86 100644
--- a/sbin/ifconfig/ifbridge.c
+++ b/sbin/ifconfig/ifbridge.c
@@ -321,6 +321,20 @@ unsetbridge_learn(const char *val, int d, int s, const struct afswtch *afp)
 }
 
 static void
+setbridge_sticky(const char *val, int d, int s, const struct afswtch *afp)
+{
+
+	do_bridgeflag(s, val, IFBIF_STICKY,  1);
+}
+
+static void
+unsetbridge_sticky(const char *val, int d, int s, const struct afswtch *afp)
+{
+
+	do_bridgeflag(s, val, IFBIF_STICKY,  0);
+}
+
+static void
 setbridge_span(const char *val, int d, int s, const struct afswtch *afp)
 {
 	struct ifbreq req;
@@ -639,6 +653,8 @@ static struct cmd bridge_cmds[] = {
 	DEF_CMD_ARG("-discover",	unsetbridge_discover),
 	DEF_CMD_ARG("learn",		setbridge_learn),
 	DEF_CMD_ARG("-learn",		unsetbridge_learn),
+	DEF_CMD_ARG("sticky",		setbridge_sticky),
+	DEF_CMD_ARG("-sticky",		unsetbridge_sticky),
 	DEF_CMD_ARG("span",		setbridge_span),
 	DEF_CMD_ARG("-span",		unsetbridge_span),
 	DEF_CMD_ARG("stp",		setbridge_stp),