diff options
| author | Denys Vlasenko <vda.linux@googlemail.com> | 2018-01-23 16:46:31 +0100 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2018-01-23 16:46:31 +0100 |
| commit | 30b290f996366e9370eadc0321cb59ec4eb85181 (patch) | |
| tree | 008e411f745666564638fbfacac4818bb4836bc7 /networking | |
| parent | 66ad9be6031a3c5c0491b0040270b3f9ff591cdf (diff) | |
udhcpc6: additional fix for ppp interface type
Invent a fictitious MAC only once
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'networking')
| -rw-r--r-- | networking/udhcp/d6_socket.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/networking/udhcp/d6_socket.c b/networking/udhcp/d6_socket.c index f9082ee9d..315c8d98a 100644 --- a/networking/udhcp/d6_socket.c +++ b/networking/udhcp/d6_socket.c @@ -69,8 +69,12 @@ int FAST_FUNC d6_read_interface(const char *interface, int *ifindex, struct in6_ if (ioctl(fd, SIOCGIFINDEX, &ifr) == 0) { *ifindex = ifr.ifr_ifindex; log2("ifindex %d", *ifindex); - ((uint32_t*)mac)[0] = rand(); - ((uint16_t*)mac)[2] = rand(); + if (((uint32_t*)mac)[0] == 0) { + /* invent a fictitious MAC (once) */ + ((uint32_t*)mac)[0] = rand(); + ((uint16_t*)mac)[2] = rand(); + mac[0] &= 0xfc; /* make sure it's not bcast */ + } retval &= (3 - (1<<0)); } close(fd); |