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sd-dhcp6: ensure canceling lease timers and refactor setting lease

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Factor our common code to set/clear the client lease.
Resetting the lease involves canceling old timers.

Also, most importantly, when resetting the lease
in client_receive_advertise(), ensure to cancel
the timers too. It is not immediately clear, why
at that point no timers would be pending.

The lease-unref from sd_dhcp6_client_unref() can
be omited, because of the preceeding client_reset()
call.
This commit is contained in:
Thomas Haller 2015-09-22 14:17:32 +02:00
parent c97e586d8a
commit f89087272b
1 changed files with 11 additions and 13 deletions
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24
src/libsystemd-network/sd-dhcp6-client.c
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@ -266,13 +266,18 @@ static void client_notify(sd_dhcp6_client *client, int event) {
client->cb(client, event, client->userdata);
}
static void client_set_lease(sd_dhcp6_client *client, sd_dhcp6_lease *lease) {
if (client->lease) {
dhcp6_lease_clear_timers(&client->lease->ia);
sd_dhcp6_lease_unref(client->lease);
}
client->lease = lease;
}
static int client_reset(sd_dhcp6_client *client) {
assert_return(client, -EINVAL);
if (client->lease) {
dhcp6_lease_clear_timers(&client->lease->ia);
client->lease = sd_dhcp6_lease_unref(client->lease);
}
client_set_lease(client, NULL);
client->receive_message =
sd_event_source_unref(client->receive_message);
@ -826,12 +831,7 @@ static int client_receive_reply(sd_dhcp6_client *client, DHCP6Message *reply, si
return 0;
}
if (client->lease) {
dhcp6_lease_clear_timers(&client->lease->ia);
client->lease = sd_dhcp6_lease_unref(client->lease);
}
client->lease = lease;
client_set_lease(client, lease);
lease = NULL;
return DHCP6_STATE_BOUND;
@ -860,8 +860,7 @@ static int client_receive_advertise(sd_dhcp6_client *client, DHCP6Message *adver
r = dhcp6_lease_get_preference(client->lease, &pref_lease);
if (r < 0 || pref_advertise > pref_lease) {
sd_dhcp6_lease_unref(client->lease);
client->lease = lease;
client_set_lease(client, lease);
lease = NULL;
r = 0;
}
@ -1233,7 +1232,6 @@ sd_dhcp6_client *sd_dhcp6_client_unref(sd_dhcp6_client *client) {
client_reset(client);
sd_dhcp6_client_detach_event(client);
sd_dhcp6_lease_unref(client->lease);
free(client->req_opts);
free(client);