'NSA addition to ifconfig'

[brynet]

That is just some diff someone sent to a mailing list, one real nifty feature of OpenBSD's ifconfig(8) is 'lladdr random', which will randomly assign a new MAC address to an interface.

Apparently well received by developers in airport lounges.

[brynet]

BTW -- it's also really easy to configure wireless on OpenBSD compared to other systems:

    # ifconfig iwm0 scan

...

    # ifconfig iwm0 nwid "AP" [wpakey pass] [nwkey pass] up
    # dhclient iwm0

http://man.openbsd.org/OpenBSD-current/man8/ifconfig.8#IEEE_...

http://man.openbsd.org/OpenBSD-current/man5/hostname.if.5

[egwynn]

According to the diff (and its accompanying message) this is what it supplements. It allows one to specify “nsa” instead of “random”, and it’ll fill in the first three bytes (with 00:20:91) for you.

[Hello71]

somewhat difficult to find, but:

    echo "mac_addr=1" >> /etc/wpa_supplicant/wpa_supplicant.conf

documented at https://w1.fi/cgit/hostap/plain/wpa_supplicant/wpa_supplican... line 405.

[atmosx]

Hm, here:

    $ sudo ifconfig en0 ether `openssl rand -hex 6 | sed 's/\(..\)/\1:/g; s/.$//'`

[trothamel]

The joke being, of course, that 00:20:91 is the OUI (3-byte MAC address prefix) assigned to the NSA.

[int0x80]

NSA has a MAC address prefix??

[nickpsecurity]

That's funny. I like screwing with them, too. My last, temporary keypair was labeled "[email protected]." Smart people got a nice laugh out of it. Then, there was another category of persons that had sudden concerns about my true identity. They also had encrypted, authenticated mockery in their inbox upon voicing them.

[bitwize]

Smart people got a nice laugh out of it.

And smart FBI agents think it's very funny identity fraud.

[poizan42]

Completely offtopic, but am I the only one who don't like the usage of ! in the strcmp checks? To me conceptually !cond is checking for falsity, but the return value from strcmp is not logically a boolean

[bpineau]

It's just a shorthand for '== 0' (since !0 is true, and !<non-zero> is false). strcmp(3) returns 0 when the two strings are identical. So "if (!strcmp(a, b))" means "if the strings a and b are the same.

[int0x80]

In the general case I'm with you, but I think !strcmp is a very common idiom that makes me(and most C programmers) go "string equality". There is also the streq(a, b) camp that #define streq !strcmp.

[moosterv]

I agree. I also hate var++; on a line by itself. I'd prefer var += 1;