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netconfig: Add station state watch

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netconfig is interested in three station states: connected,
disconnected and connected after it has roamed. On connected
it tries to obtain a new DHCP lease, on disconnected it stops
the DHCP client and discards all addresses from interface, on
connected after roaming it will try to request a previously
issued address.
This commit is contained in:
Tim Kourt 2019-06-25 15:20:57 -07:00 committed by Denis Kenzior
parent 3d40f3a38b
commit b70ff5d091
1 changed files with 53 additions and 0 deletions
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53
src/netconfig.c
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@ -40,6 +40,7 @@
struct netconfig {
uint32_t ifindex;
enum station_state station_state;
struct l_dhcp_client *dhcp_client;
struct l_queue *ifaddr_list;
};
@ -219,6 +220,11 @@ static void netconfig_ifaddr_cmd_cb(int error, uint16_t type,
netconfig_ifaddr_notify(type, data, len, user_data);
}
static bool netconfig_ifaddr_remove(void *data, void *user_data)
{
return false;
}
static bool netconfig_install_addresses(struct netconfig *netconfig,
const struct netconfig_ifaddr *ifaddr,
const char *gateway, char **dns)
@ -346,6 +352,50 @@ static bool netconfig_dhcp_create(struct netconfig *netconfig,
return true;
}
static void netconfig_station_state_changed(enum station_state state,
void *userdata)
{
struct netconfig *netconfig = userdata;
struct station *station;
l_debug("");
switch (state) {
case STATION_STATE_CONNECTED:
station = station_find(netconfig->ifindex);
if (!station)
break;
if (netconfig->station_state == STATION_STATE_ROAMING) {
/*
* TODO l_dhcp_client to try to request a previously
* used address.
*
* break;
*/
}
if (!l_dhcp_client_start(netconfig->dhcp_client))
l_error("netconfig: Failed to start DHCPv4 client for "
"interface %u", netconfig->ifindex);
break;
case STATION_STATE_DISCONNECTED:
l_dhcp_client_stop(netconfig->dhcp_client);
l_queue_foreach_remove(netconfig->ifaddr_list,
netconfig_ifaddr_remove, netconfig);
break;
case STATION_STATE_ROAMING:
break;
default:
return;
}
netconfig->station_state = state;
}
bool netconfig_ifindex_add(uint32_t ifindex)
{
struct netconfig *netconfig;
@ -370,6 +420,9 @@ bool netconfig_ifindex_add(uint32_t ifindex)
netconfig_dhcp_create(netconfig, station);
station_add_state_watch(station, netconfig_station_state_changed,
netconfig, NULL);
l_queue_push_tail(netconfig_list, netconfig);
return true;