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netdev: Add logic to randomize address on creation

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This commit is contained in:
Denis Kenzior 2019-07-01 18:29:37 -05:00
parent ec38545a68
commit 8b375e1b28
2 changed files with 46 additions and 4 deletions
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48
src/netdev.c
View File

@ -145,6 +145,7 @@ struct netdev {
bool ignore_connect_event : 1; bool ignore_connect_event : 1;
bool expect_connect_failure : 1; bool expect_connect_failure : 1;
bool aborting : 1; bool aborting : 1;
bool mac_randomize_once : 1;
}; };
struct netdev_preauth_state { struct netdev_preauth_state {
@ -4154,6 +4155,20 @@ static void netdev_initial_up_cb(int error, uint16_t type, const void *data,
netdev, NETDEV_WATCH_EVENT_NEW); netdev, NETDEV_WATCH_EVENT_NEW);
} }
static void netdev_set_mac_cb(int error, uint16_t type, const void *data,
uint32_t len, void *user_data)
{
struct netdev *netdev = user_data;
if (error)
l_error("Error setting mac address on %d: %s", netdev->index,
strerror(-error));
netdev->set_powered_cmd_id =
rtnl_set_powered(netdev->index, true, netdev_initial_up_cb,
netdev, NULL);
}
static void netdev_initial_down_cb(int error, uint16_t type, const void *data, static void netdev_initial_down_cb(int error, uint16_t type, const void *data,
uint32_t len, void *user_data) uint32_t len, void *user_data)
{ {
@ -4169,6 +4184,18 @@ static void netdev_initial_down_cb(int error, uint16_t type, const void *data,
return; return;
} }
if (netdev->mac_randomize_once) {
uint8_t addr[ETH_ALEN];
wiphy_generate_random_address(netdev->wiphy, addr);
l_debug("Setting initial random address on "
"ifindex: %d to: "MAC, netdev->index, MAC_STR(addr));
netdev->set_powered_cmd_id =
rtnl_set_mac(rtnl, netdev->index, addr,
netdev_set_mac_cb, netdev, NULL);
return;
}
netdev->set_powered_cmd_id = netdev->set_powered_cmd_id =
rtnl_set_powered(netdev->index, true, netdev_initial_up_cb, rtnl_set_powered(netdev->index, true, netdev_initial_up_cb,
netdev, NULL); netdev, NULL);
@ -4203,10 +4230,24 @@ static void netdev_getlink_cb(int error, uint16_t type, const void *data,
netdev_newlink_notify(ifi, bytes); netdev_newlink_notify(ifi, bytes);
/* /*
* If the interface is UP, reset it to ensure a clean state, * If the interface is UP, reset it to ensure a clean state.
* otherwise just bring it UP. * Otherwise, if we need to set a random mac, do so. If not, just
* bring the interface UP.
*/ */
powered = netdev_get_is_up(netdev); powered = netdev_get_is_up(netdev);
if (!powered && netdev->mac_randomize_once) {
uint8_t addr[ETH_ALEN];
wiphy_generate_random_address(netdev->wiphy, addr);
l_debug("Setting initial random address on "
"ifindex: %d to: "MAC, netdev->index, MAC_STR(addr));
netdev->set_powered_cmd_id =
rtnl_set_mac(rtnl, netdev->index, addr,
netdev_set_mac_cb, netdev, NULL);
return;
}
cb = powered ? netdev_initial_down_cb : netdev_initial_up_cb; cb = powered ? netdev_initial_down_cb : netdev_initial_up_cb;
netdev->set_powered_cmd_id = netdev->set_powered_cmd_id =
@ -4335,7 +4376,7 @@ error:
return NULL; return NULL;
} }
struct netdev *netdev_create_from_genl(struct l_genl_msg *msg) struct netdev *netdev_create_from_genl(struct l_genl_msg *msg, bool random_mac)
{ {
struct l_genl_attr attr; struct l_genl_attr attr;
uint16_t type, len; uint16_t type, len;
@ -4454,6 +4495,7 @@ struct netdev *netdev_create_from_genl(struct l_genl_msg *msg)
memcpy(netdev->name, ifname, ifname_len); memcpy(netdev->name, ifname, ifname_len);
netdev->wiphy = wiphy; netdev->wiphy = wiphy;
netdev->pae_over_nl80211 = pae_over_nl80211; netdev->pae_over_nl80211 = pae_over_nl80211;
netdev->mac_randomize_once = random_mac;
if (pae_io) { if (pae_io) {
netdev->pae_io = pae_io; netdev->pae_io = pae_io;

2
src/netdev.h
View File

@ -207,5 +207,5 @@ uint32_t netdev_station_watch_add(struct netdev *netdev,
bool netdev_station_watch_remove(struct netdev *netdev, uint32_t id); bool netdev_station_watch_remove(struct netdev *netdev, uint32_t id);
struct netdev *netdev_create_from_genl(struct l_genl_msg *msg); struct netdev *netdev_create_from_genl(struct l_genl_msg *msg, bool random_mac);
bool netdev_destroy(struct netdev *netdev); bool netdev_destroy(struct netdev *netdev);