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ip link: show permanent hardware address

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Display permanent hardware address of an interface in output of
"ip link show" and "ip addr show". To reduce noise, permanent address is
only shown if it is different from current one.

Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David Ahern <dsahern@gmail.com>
This commit is contained in:
Michal Kubecek 2019-12-15 22:06:10 +01:00 committed by David Ahern
parent 974f889c2d
commit 2b8e6995fe
1 changed files with 18 additions and 0 deletions
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18
ip/ipaddress.c
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@ -1011,6 +1011,24 @@ int print_linkinfo(struct nlmsghdr *n, void *arg)
ifi->ifi_type,
b1, sizeof(b1)));
}
if (tb[IFLA_PERM_ADDRESS]) {
unsigned int len = RTA_PAYLOAD(tb[IFLA_PERM_ADDRESS]);
if (!tb[IFLA_ADDRESS] ||
RTA_PAYLOAD(tb[IFLA_ADDRESS]) != len ||
memcmp(RTA_DATA(tb[IFLA_PERM_ADDRESS]),
RTA_DATA(tb[IFLA_ADDRESS]), len)) {
print_string(PRINT_FP, NULL, " permaddr ", NULL);
print_color_string(PRINT_ANY,
COLOR_MAC,
"permaddr",
"%s",
ll_addr_n2a(RTA_DATA(tb[IFLA_PERM_ADDRESS]),
RTA_PAYLOAD(tb[IFLA_PERM_ADDRESS]),
ifi->ifi_type,
b1, sizeof(b1)));
}
}
}
if (tb[IFLA_LINK_NETNSID]) {