From 23aa4e11915ec36c935bd3181624c76b4782c809 Mon Sep 17 00:00:00 2001
From: Antonio Huete Jimenez <tuxillo@quantumachine.net>
Date: Fri, 28 Dec 2012 20:49:17 +0100
Subject: [PATCH] kern - Add kether_ntoa, kether_aton functions.

- kether_aton() converts a human readable MAC string to an
  ethernet address.
- kether_ntoa() converts ethernet addresses into human readable
  MAC string.

Human readable notation is specified in IEEE 802.
---
 sys/net/if_ethersubr.c | 39 +++++++++++++++++++++++++++++++++++++++
 sys/net/if_var.h       |  2 ++
 2 files changed, 41 insertions(+)

diff --git a/sys/net/if_ethersubr.c b/sys/net/if_ethersubr.c
index 18e138513c..838fd55085 100644
--- a/sys/net/if_ethersubr.c
+++ b/sys/net/if_ethersubr.c
@@ -1675,4 +1675,43 @@ failed:
 	return FALSE;
 }
 
+u_char *
+kether_aton(const char *macstr, u_char *addr)
+{
+        unsigned int o0, o1, o2, o3, o4, o5;
+        int n;
+
+        if (macstr == NULL || addr == NULL)
+                return NULL;
+
+        n = ksscanf(macstr, "%x:%x:%x:%x:%x:%x", &o0, &o1, &o2,
+            &o3, &o4, &o5);
+        if (n != 6)
+                return NULL;
+
+        addr[0] = o0;
+        addr[1] = o1;
+        addr[2] = o2;
+        addr[3] = o3;
+        addr[4] = o4;
+        addr[5] = o5;
+
+        return addr;
+}
+
+char *
+kether_ntoa(const u_char *addr, char *buf)
+{
+        int len = 3 * ETHER_ADDR_LEN;
+        int n;
+
+        n = ksnprintf(buf, len, "%02x:%02x:%02x:%02x:%02x:%02x", addr[0],
+            addr[1], addr[2], addr[3], addr[4], addr[5]);
+
+        if (n < 17)
+                return NULL;
+
+        return buf;
+}
+
 MODULE_VERSION(ether, 1);
diff --git a/sys/net/if_var.h b/sys/net/if_var.h
index 31a57de923..8613d65449 100644
--- a/sys/net/if_var.h
+++ b/sys/net/if_var.h
@@ -759,6 +759,8 @@ void	ether_reinput_oncpu(struct ifnet *, struct mbuf *, int);
 void	ether_input_pkt(struct ifnet *, struct mbuf *, const struct pktinfo *);
 int	ether_output_frame(struct ifnet *, struct mbuf *);
 int	ether_ioctl(struct ifnet *, u_long, caddr_t);
+u_char	*kether_aton(const char *, u_char *);
+char	*kether_ntoa(const u_char *, char *);
 boolean_t ether_tso_pullup(struct mbuf **, int *, struct ip **, int *,
 	    struct tcphdr **, int *);
 struct ifnet *ether_bridge_interface(struct ifnet *ifp);
-- 
2.41.0