Importing pfSense patch ng_iface.diff

2 files changed, 57 insertions, 0 deletions

diff --git a/sys/netgraph/ng_iface.c b/sys/netgraph/ng_iface.c
index 7bbc1da..a38ab9c 100644
--- a/sys/netgraph/ng_iface.c
+++ b/sys/netgraph/ng_iface.c
@@ -58,6 +58,7 @@
 #include <sys/param.h>
 #include <sys/systm.h>
 #include <sys/errno.h>
+#include <sys/eventhandler.h>
 #include <sys/kernel.h>
 #include <sys/malloc.h>
 #include <sys/mbuf.h>
@@ -70,6 +71,7 @@
 #include <sys/libkern.h>
 
 #include <net/if.h>
+#include <net/if_dl.h>
 #include <net/if_var.h>
 #include <net/if_types.h>
 #include <net/bpf.h>
@@ -154,6 +156,13 @@ static const struct ng_cmdlist ng_iface_cmds[] = {
 	},
 	{
 	  NGM_IFACE_COOKIE,
+	  NGM_IFACE_SET_IFNAME,
+	  "setifname",
+	  &ng_parse_string_type,
+	  NULL
+	},
+	{
+	  NGM_IFACE_COOKIE,
 	  NGM_IFACE_POINT2POINT,
 	  "point2point",
 	  NULL,
@@ -586,6 +595,10 @@ ng_iface_rcvmsg(node_p node, item_p item, hook_p lasthook)
 	struct ng_mesg *resp = NULL;
 	int error = 0;
 	struct ng_mesg *msg;
+	char *new_name;
+	size_t namelen, onamelen;
+	struct sockaddr_dl *sdl = NULL;
+	struct ifaddr *ifa = NULL;
 
 	NGI_GET_MSG(item, msg);
 	switch (msg->header.typecookie) {
@@ -600,6 +613,49 @@ ng_iface_rcvmsg(node_p node, item_p item, hook_p lasthook)
 			strlcpy(resp->data, ifp->if_xname, IFNAMSIZ);
 			break;
 
+		case NGM_IFACE_SET_IFNAME:
+
+			new_name = (char *)msg->data;
+			/* Announce the departure of the interface. */
+			//new_name[strlen(new_name)] = '\0';
+
+			/* Deny request if interface is UP */
+			if ((ifp->if_flags & IFF_UP) != 0) {
+				error = EBUSY;
+				break;
+			}
+
+			//rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
+			EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
+
+			IF_ADDR_WLOCK(ifp);
+			strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname));
+			ifa = ifp->if_addr;
+			sdl = (struct sockaddr_dl *)ifa->ifa_addr;
+			namelen = strlen(new_name) + 1;
+			onamelen = sdl->sdl_nlen;
+			/*
+			 * Move the address if needed.  This is safe because we
+			 * allocate space for a name of length IFNAMSIZ when we
+			 * create this in if_attach().
+			 */
+			if (namelen != onamelen) {
+				bcopy(sdl->sdl_data + onamelen,
+				    sdl->sdl_data + namelen, sdl->sdl_alen);
+			}
+			bcopy(new_name, sdl->sdl_data, namelen);
+			sdl->sdl_nlen = namelen;
+			sdl = (struct sockaddr_dl *)ifa->ifa_netmask;
+			bzero(sdl->sdl_data, onamelen);
+			while (namelen != 0)
+				sdl->sdl_data[--namelen] = 0xff;
+			IF_ADDR_WUNLOCK(ifp);
+
+			EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp);
+			/* Announce the return of the interface. */
+			//rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
+			break;
+
 		case NGM_IFACE_POINT2POINT:
 		case NGM_IFACE_BROADCAST:
 		    {
diff --git a/sys/netgraph/ng_iface.h b/sys/netgraph/ng_iface.h
index 3497e9d..4bbae3b 100644
--- a/sys/netgraph/ng_iface.h
+++ b/sys/netgraph/ng_iface.h
@@ -68,6 +68,7 @@ enum {
 	NGM_IFACE_POINT2POINT,
 	NGM_IFACE_BROADCAST,
 	NGM_IFACE_GET_IFINDEX,
+	NGM_IFACE_SET_IFNAME,
 };
 
 #define	MTAG_NGIF			NGM_IFACE_COOKIE