1 files changed, 110 insertions, 0 deletions
diff --git a/net/ax25/ax25_netlink.c b/net/ax25/ax25_netlink.c
new file mode 100644
index 000000000..73e25e234
--- /dev/null
+++ b/net/ax25/ax25_netlink.c
@@ -0,0 +1,110 @@
+/*
+ * ax25_netlink.c: NETLINK interface for NEW-AX.25
+ *
+ * Authors:        Jens David (DG1KJD), Matthias Welwarsky (DG2FEF), Jonathan (
+ *                 Alan Cox (GW4PTS), Joerg (DL1BKE), et al
+ *
+ * Comment:        It is intended to develop a new AX.25 routing daemon using t
+ *                 method to communicate with the kernel part. Recent developme
+ *                 Linux' realtime abilities, however, suggest removing AX.25 c
+ *                 from kernel space.
+ *
+ * Changelog:
+ *
+ * License:       This module 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.
+*/
+
+#include <linux/skbuff.h>
+#include <linux/netlink.h>
+#include <linux/ax25.h>
+#include <net/sock.h>
+#include <net/ax25.h>
+
+#include "ax25_netlink.h"
+#include "ax25_route.h"
+
+static struct sock *axrtnl;
+
+static void ax25_netlink_rcv(struct sock *sk, int len)
+{
+        struct ax25_nlmsg *nlmsg;
+	struct sk_buff *skb;
+	struct net_device *dev;
+
+	while ((skb = skb_dequeue(&sk->receive_queue)) != NULL) {
+		if (skb->len < sizeof(struct ax25_nlmsg)) {
+			kfree_skb(skb);
+			break;
+		}
+		nlmsg = (struct ax25_nlmsg *)skb->data;
+
+		switch (nlmsg->msg_type) {
+		case AX25_MSG_SETRT:
+			if ((dev = dev_get(nlmsg->msg.pathmsg.port_name)) != NULL
+			    && nlmsg->msg.pathmsg.path.dcount <= AX25_MAX_DIGIS)
+				ax25_add_route(&nlmsg->msg.pathmsg.path, dev);
+			break;
+
+		case AX25_MSG_DELRT:
+			if ((dev = dev_get(nlmsg->msg.pathmsg.port_name)) != NULL)
+				ax25_del_route(&nlmsg->msg.pathmsg.path.addr);
+			break;
+
+		case AX25_MSG_OPTRT:
+			if ((dev = dev_get(nlmsg->msg.pathmsg.port_name)) != NULL
+			    && nlmsg->msg.pathmsg.path.dcount <= AX25_MAX_DIGIS)
+			{
+				ax25_add_route(&nlmsg->msg.pathmsg.path, dev);
+				ax25_ipopt_route(&nlmsg->msg.pathmsg.path.addr, nlmsg->msg.pathmsg.mode);
+			}
+		}
+		kfree_skb(skb);
+	}
+}
+
+void ax25_nlpost_route(ax25_pktinfo *pkt, struct net_device *dev)
+{
+	struct ax25_nlmsg *nlmsg;
+	struct sk_buff *skb;
+
+	skb = alloc_skb(sizeof(struct ax25_nlmsg), GFP_ATOMIC);
+	if (!skb)
+		return;
+	nlmsg = (struct ax25_nlmsg *)skb_put(skb, sizeof(struct ax25_nlmsg));
+
+	nlmsg->msg_type = AX25_MSG_RTINFO;
+	strncpy(nlmsg->msg.rtmsg.port_name, dev->name, sizeof(nlmsg->msg.rtmsg.port_name));
+	nlmsg->msg.rtmsg.addr = pkt->addr;
+	netlink_broadcast(axrtnl, skb, 0, ~0, GFP_KERNEL);
+}
+
+void ax25_nlpost_armsg(unsigned int ip_addr, ax25_address *ax_addr, struct net_device *dev)
+{
+	struct ax25_nlmsg *nlmsg;
+	struct sk_buff *skb;
+
+	skb = alloc_skb(sizeof(struct ax25_nlmsg), GFP_ATOMIC);
+	if (!skb)
+		return;
+	nlmsg = (struct ax25_nlmsg *)skb_put(skb, sizeof(struct ax25_nlmsg));
+
+	nlmsg->msg_type = AX25_MSG_ARINFO;
+	strncpy(nlmsg->msg.armsg.port_name, dev->name, sizeof(nlmsg->msg.armsg.port_name));
+	nlmsg->msg.armsg.ip_addr = ip_addr;
+	nlmsg->msg.armsg.ax_addr = *ax_addr;
+
+	netlink_broadcast(axrtnl, skb, 0, ~0, GFP_KERNEL);
+}
+
+void ax25_netlink_init(void)
+{
+	axrtnl = netlink_kernel_create(NETLINK_AX25, ax25_netlink_rcv);
+}
+
+void ax25_netlink_cleanup(void)
+{
+	sock_release(axrtnl->socket);
+}