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iwd
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netdev: support for REKEY_OFFLOAD and its event handling

This commit is contained in:
Rahul Rahul 2016-06-22 15:49:16 -07:00 committed by Denis Kenzior
parent fb339bcc76
commit 5853440dfa
1 changed files with 106 additions and 0 deletions
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106
src/netdev.c
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@ -70,6 +70,7 @@ struct netdev {
struct l_queue *watches;
uint32_t next_watch_id;
bool rekey_offload_support : 1;
};
struct netdev_watch {
@ -297,6 +298,46 @@ static void netdev_cqm_event(struct l_genl_msg *msg, struct netdev *netdev)
}
}
static void netdev_rekey_offload_event(struct l_genl_msg *msg,
struct netdev *netdev)
{
struct l_genl_attr attr;
struct l_genl_attr nested;
uint16_t type, len;
const void *data;
uint64_t replay_ctr;
if (!l_genl_attr_init(&attr, msg))
return;
while (l_genl_attr_next(&attr, &type, &len, &data)) {
switch (type) {
case NL80211_ATTR_REKEY_DATA:
if (!l_genl_attr_recurse(&attr, &nested))
return;
while (l_genl_attr_next(&nested, &type, &len, &data)) {
switch (type) {
case NL80211_REKEY_DATA_REPLAY_CTR:
if (len != sizeof(uint64_t))
l_warn("Invalid replay_ctr");
else {
replay_ctr = *((uint64_t *)
data);
__eapol_update_replay_counter(
netdev->index,
netdev->addr,
netdev->remote_addr,
replay_ctr);
}
break;
}
}
}
}
}
static void netdev_disconnect_event(struct l_genl_msg *msg,
struct netdev *netdev)
{
@ -731,6 +772,67 @@ static void netdev_handshake_failed(uint32_t ifindex,
netdev->user_data);
}
static void hardware_rekey_cb(struct l_genl_msg *msg, void *data)
{
struct netdev *netdev = data;
int err;
err = l_genl_msg_get_error(msg);
if (err < 0) {
if (err == -EOPNOTSUPP) {
l_error("hardware_rekey not supported");
netdev->rekey_offload_support = false;
}
}
}
static struct l_genl_msg *netdev_build_cmd_replay_counter(struct netdev *netdev,
const uint8_t *kek,
const uint8_t *kck,
uint64_t replay_ctr)
{
struct l_genl_msg *msg;
msg = l_genl_msg_new_sized(NL80211_CMD_SET_REKEY_OFFLOAD, 512);
l_genl_msg_append_attr(msg, NL80211_ATTR_IFINDEX, 4, &netdev->index);
l_genl_msg_enter_nested(msg, NL80211_ATTR_REKEY_DATA);
l_genl_msg_append_attr(msg, NL80211_REKEY_DATA_KEK,
NL80211_KEK_LEN, kek);
l_genl_msg_append_attr(msg, NL80211_REKEY_DATA_KCK,
NL80211_KCK_LEN, kck);
l_genl_msg_append_attr(msg, NL80211_REKEY_DATA_REPLAY_CTR,
NL80211_REPLAY_CTR_LEN, &replay_ctr);
l_genl_msg_leave_nested(msg);
return msg;
}
static void netdev_set_rekey_offload(uint32_t ifindex,
const uint8_t *kek,
const uint8_t *kck,
uint64_t replay_counter,
void *user_data)
{
struct netdev *netdev;
struct l_genl_msg *msg;
netdev = netdev_find(ifindex);
if (!netdev)
return;
if (!netdev->rekey_offload_support)
return;
l_debug("%d", netdev->index);
msg = netdev_build_cmd_replay_counter(netdev, kek, kck,
replay_counter);
l_genl_family_send(nl80211, msg, hardware_rekey_cb, netdev, NULL);
}
static void netdev_associate_event(struct l_genl_msg *msg,
struct netdev *netdev)
{
@ -1023,6 +1125,9 @@ static void netdev_mlme_notify(struct l_genl_msg *msg, void *user_data)
case NL80211_CMD_NOTIFY_CQM:
netdev_cqm_event(msg, netdev);
break;
case NL80211_CMD_SET_REKEY_OFFLOAD:
netdev_rekey_offload_event(msg, netdev);
break;
}
}
@ -1156,6 +1261,7 @@ static void netdev_get_interface_callback(struct l_genl_msg *msg,
netdev = l_new(struct netdev, 1);
netdev->index = *ifindex;
netdev->type = *iftype;
netdev->rekey_offload_support = true;
memcpy(netdev->addr, ifaddr, sizeof(netdev->addr));
memcpy(netdev->name, ifname, ifname_len);