Hello.

This trivial patch keeps leading zeros in MAC address bytes, so that they had
a fixed length.

Sample of tcpdump output
before:
18:08:24.293100 0:e0:4c:a0:a5:56 ff:ff:ff:ff:ff:ff
18:08:24.293665 0:e0:4c:a0:a5:8 ff:ff:ff:ff:ff:ff

after:
18:08:24.293100 00:e0:4c:a0:a5:56 ff:ff:ff:ff:ff:ff
18:08:24.293665 00:e0:4c:a0:a5:08 ff:ff:ff:ff:ff:ff


================================================== =================
RCS file: /cvs/src/usr.sbin/tcpdump/addrtoname.c,v
retrieving revision 1.28
diff -u -p -r1.28 addrtoname.c
--- addrtoname.c 26 Feb 2006 21:10:54 -0000 1.28
+++ addrtoname.c 18 Jun 2007 02:24:12 -0000
@@ -474,13 +474,13 @@ etheraddr_string(register const u_char *
}
#endif
cp = buf;
- if ((j = *ep >> 4) != 0)
- *cp++ = hex[j];
+ j = *ep >> 4;
+ *cp++ = hex[j];
*cp++ = hex[*ep++ & 0xf];
for (i = 5; (int)--i >= 0 {
*cp++ = ':';
- if ((j = *ep >> 4) != 0)
- *cp++ = hex[j];
+ j = *ep >> 4;
+ *cp++ = hex[j];
*cp++ = hex[*ep++ & 0xf];
}
*cp = '\0';