Following this tweet:
https://twitter.com/_mcbride/status/733766997343883264
I thought I would add the nsa option to ifconfig:
port:fred ~/code/c/stuff/ifconfig> doas ./ifconfig iwn0 lladdr nsa
which results in:
port:fred ~/code/c/stuff/ifconfig> ifconfig iwn0
iwn0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> mtu 1500
lladdr 00:20:91:9d:48:06
index 2 priority 4
groups: wlan
media: IEEE802.11 autoselect
status: no network
ieee80211: nwid ""
The following patch updates ifconfig.c and ifconfig.8 to add the nsa
option :~)
Enjoy
Fred
--- /usr/src/sbin/ifconfig/ifconfig.c Mon May 9 23:03:20 2016
+++ ./ifconfig.c Sun May 22 11:04:30 2016
@@ -5189,7 +5189,14 @@ setiflladdr(const char *addr, int param)
{
struct ether_addr *eap, eabuf;
- if (!strcmp(addr, "random")) {
+ if (!strcmp(addr, "nsa")) {
+ arc4random_buf(&eabuf, sizeof eabuf);
+ /* NSA hardware address */
+ eabuf.ether_addr_octet[0] = 0x00;
+ eabuf.ether_addr_octet[1] = 0x20;
+ eabuf.ether_addr_octet[2] = 0x91;
+ eap = &eabuf;
+ } else if (!strcmp(addr, "random")) {
arc4random_buf(&eabuf, sizeof eabuf);
/* Non-multicast and claim it is a hardware address */
eabuf.ether_addr_octet[0] &= 0xfc;
--- /usr/src/sbin/ifconfig/ifconfig.8 Mon May 9 23:03:20 2016
+++ ./ifconfig.8 Sun May 22 11:01:14 2016
@@ -323,10 +323,11 @@ of this is to select the connector type for some Ether
Refer to the man page for the specific driver for more information.
.It Fl link[0-2]
Disable special processing at the link level with the specified interface.
-.It Cm lladdr Ar etheraddr Ns | Ns Cm random
+.It Cm lladdr Ar etheraddr Ns | Ns Cm random | Ns Cm nsa
Change the link layer address (MAC address) of the interface.
-This should be specified as six colon-separated hex values, or can
-be chosen randomly.
+This should be specified as six colon-separated hex values, can
+be chosen randomly, or first three octets of 00:20:91 and random
+last three octets.
.It Cm media Op Ar type
Set the media type of the interface to
.Ar type .
