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iwd
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manager: Create interfaces with a random mac 

If supported by the driver, we can create an interface directly with a
random MAC if configured to do so.  If the driver does not have this
capability, then tell netdev to perform the necessary logic as part of
the interface initialization procedure.
This commit is contained in:
Denis Kenzior 2019-07-01 18:30:10 -05:00
parent 8b375e1b28
commit bd4446070f
1 changed files with 25 additions and 2 deletions
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27
src/manager.c
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@ -43,6 +43,7 @@
static struct l_genl_family *nl80211 = NULL;
static char **whitelist_filter;
static char **blacklist_filter;
static bool randomize;
struct wiphy_setup_state {
uint32_t id;
@ -109,7 +110,7 @@ static bool manager_use_default(struct wiphy_setup_state *state)
return false;
}
netdev_create_from_genl(state->default_if_msg);
netdev_create_from_genl(state->default_if_msg, randomize);
return true;
}
@ -133,7 +134,9 @@ static void manager_new_interface_cb(struct l_genl_msg *msg, void *user_data)
return;
}
netdev_create_from_genl(msg);
netdev_create_from_genl(msg, randomize &&
!wiphy_has_feature(state->wiphy,
NL80211_FEATURE_MAC_ON_CREATE));
}
static void manager_new_interface_done(void *user_data)
@ -177,6 +180,18 @@ static void manager_create_interfaces(struct wiphy_setup_state *state)
strlen(ifname) + 1, ifname);
l_genl_msg_append_attr(msg, NL80211_ATTR_4ADDR, 1, "\0");
l_genl_msg_append_attr(msg, NL80211_ATTR_SOCKET_OWNER, 0, "");
if (randomize && wiphy_has_feature(state->wiphy,
NL80211_FEATURE_MAC_ON_CREATE)) {
uint8_t random_addr[6];
wiphy_generate_random_address(state->wiphy, random_addr);
l_debug("Creating interface on phy: %s with random addr: "MAC,
wiphy_get_name(state->wiphy),
MAC_STR(random_addr));
l_genl_msg_append_attr(msg, NL80211_ATTR_MAC, 6, random_addr);
}
cmd_id = l_genl_family_send(nl80211, msg,
manager_new_interface_cb, state,
manager_new_interface_done);
@ -683,9 +698,11 @@ static void manager_wiphy_dump_callback(struct l_genl_msg *msg, void *user_data)
bool manager_init(struct l_genl_family *in,
const char *if_whitelist, const char *if_blacklist)
{
const struct l_settings *config = iwd_get_config();
struct l_genl_msg *msg;
unsigned int wiphy_dump;
unsigned int interface_dump;
const char *randomize_str;
nl80211 = in;
@ -725,6 +742,11 @@ bool manager_init(struct l_genl_family *in,
return false;
}
randomize_str =
l_settings_get_value(config, "General", "mac_randomize");
if (randomize_str && !strcmp(randomize_str, "once"))
randomize = true;
return true;
}
@ -737,4 +759,5 @@ void manager_exit(void)
pending_wiphys = NULL;
nl80211 = NULL;
randomize = false;
}