diff options
| author | Matteo Croce <mcroce@redhat.com> | 2018-08-21 16:38:09 +0200 |
|---|---|---|
| committer | Tobias Klauser <tklauser@distanz.ch> | 2018-08-22 10:21:37 +0200 |
| commit | c7c176394ad2b87f56b0aed2731eb9dde29750f0 (patch) | |
| tree | 1c423f98bc7ac52feb134044efeed38ccc6d0507 /staging/tools.c | |
| parent | 01f339a7bb170310f9dd6a389d9c89b6c62032d0 (diff) | |
mausezahn: improve random mac address generation
Modify -b option to generate all random MAC addresses.
Improve the random generation algorithm, use nrand48() which fills the
ethernet address in two calls instead of six calls to rand() and six
floating point calculations.
Set the locally administered bit of generated MAC addresses.
Signed-off-by: Matteo Croce <mcroce@redhat.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Diffstat (limited to 'staging/tools.c')
| -rw-r--r-- | staging/tools.c | 8 |
1 files changed, 1 insertions, 7 deletions
diff --git a/staging/tools.c b/staging/tools.c index 72445b6..f7c4131 100644 --- a/staging/tools.c +++ b/staging/tools.c @@ -687,15 +687,9 @@ int check_eth_mac_txt(int src_or_dst) // Okay, lets check the commandline argument: // // Do you want a random MAC? - // TODO: Consider enforcement of unicast addresses if (strncmp(eth_mac_txt, "rand", 4)==0) { - eth_mac[0] = (u_int8_t) ( ((float) rand()/RAND_MAX)*256); - eth_mac[1] = (u_int8_t) ( ((float) rand()/RAND_MAX)*256); - eth_mac[2] = (u_int8_t) ( ((float) rand()/RAND_MAX)*256); - eth_mac[3] = (u_int8_t) ( ((float) rand()/RAND_MAX)*256); - eth_mac[4] = (u_int8_t) ( ((float) rand()/RAND_MAX)*256); - eth_mac[5] = (u_int8_t) ( ((float) rand()/RAND_MAX)*256); + rand_addr(eth_mac); *eth_rand = 1; } // Do you want your own interface MAC? |