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sd-ipv4ll: don't allow changing MAC address whilst running

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This requires the caller to stop and restart the statemachine if they want to
change the MAC address.
This commit is contained in:
Tom Gundersen 2015-08-20 11:26:57 +02:00
parent 94a355a130
commit 5707940ed3
1 changed files with 2 additions and 15 deletions
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17
src/libsystemd-network/sd-ipv4ll.c
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@ -2,6 +2,7 @@
This file is part of systemd.
Copyright (C) 2014 Axis Communications AB. All rights reserved.
Copyright (C) 2015 Tom Gundersen
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
@ -395,29 +396,15 @@ int sd_ipv4ll_set_index(sd_ipv4ll *ll, int interface_index) {
}
int sd_ipv4ll_set_mac(sd_ipv4ll *ll, const struct ether_addr *addr) {
bool need_restart = false;
assert_return(ll, -EINVAL);
assert_return(addr, -EINVAL);
assert_return(IN_SET(ll->state, IPV4LL_STATE_INIT, IPV4LL_STATE_STOPPED), -EBUSY);
if (memcmp(&ll->mac_addr, addr, ETH_ALEN) == 0)
return 0;
if (!IN_SET(ll->state, IPV4LL_STATE_INIT, IPV4LL_STATE_STOPPED)) {
log_ipv4ll(ll, "Changing MAC address on running IPv4LL "
"client, restarting");
ll = ipv4ll_stop(ll, IPV4LL_EVENT_STOP);
need_restart = true;
}
if (!ll)
return 0;
memcpy(&ll->mac_addr, addr, ETH_ALEN);
if (need_restart)
sd_ipv4ll_start(ll);
return 0;
}