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wiphy: Obtain permanent mac address from sysfs

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This commit is contained in:
Denis Kenzior 2019-07-01 14:42:12 -05:00
parent 1e9f9e61f1
commit 1c22847cf2
2 changed files with 39 additions and 0 deletions
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38
src/wiphy.c
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@ -58,6 +58,7 @@ static char **blacklist_filter;
struct wiphy {
uint32_t id;
char name[20];
uint8_t permanent_addr[ETH_ALEN];
uint32_t feature_flags;
uint8_t ext_features[(NUM_NL80211_EXT_FEATURES + 7) / 8];
uint8_t max_num_ssids_per_scan;
@ -342,6 +343,11 @@ const char *wiphy_get_driver(struct wiphy *wiphy)
return wiphy->driver_str;
}
const uint8_t *wiphy_get_permanent_address(struct wiphy *wiphy)
{
return wiphy->permanent_addr;
}
bool wiphy_constrain_freq_set(const struct wiphy *wiphy,
struct scan_freq_set *set)
{
@ -401,6 +407,7 @@ static void wiphy_print_basic_info(struct wiphy *wiphy)
char buf[1024];
l_info("Wiphy: %d, Name: %s", wiphy->id, wiphy->name);
l_info("\tPermanent Address: "MAC, MAC_STR(wiphy->permanent_addr));
bands = scan_freq_set_get_bands(wiphy->supported_freqs);
@ -708,6 +715,29 @@ static bool wiphy_get_driver_name(struct wiphy *wiphy)
return true;
}
static int wiphy_get_permanent_addr_from_sysfs(struct wiphy *wiphy)
{
char addr[32];
ssize_t len;
len = read_file(addr, sizeof(addr),
"/sys/class/ieee80211/%s/macaddress",
wiphy->name);
if (len != 18) {
if (len < 0)
return -errno;
return -EINVAL;
}
/* Sysfs appends a \n at the end, strip it */
addr[17] = '\0';
if (!util_string_to_address(addr, wiphy->permanent_addr))
return -EINVAL;
return 0;
}
static void wiphy_register(struct wiphy *wiphy)
{
struct l_dbus *dbus = dbus_get_bus();
@ -807,6 +837,14 @@ void wiphy_update_from_genl(struct wiphy *wiphy, struct l_genl_msg *msg)
void wiphy_create_complete(struct wiphy *wiphy)
{
if (util_mem_is_zero(wiphy->permanent_addr, 6)) {
int err = wiphy_get_permanent_addr_from_sysfs(wiphy);
if (err < 0)
l_error("Can't read sysfs maccaddr for %s: %s",
wiphy->name, strerror(-err));
}
wiphy_print_basic_info(wiphy);
}

1
src/wiphy.h
View File

@ -69,6 +69,7 @@ bool wiphy_supports_iftype(struct wiphy *wiphy, uint32_t iftype);
bool wiphy_supports_adhoc_rsn(struct wiphy *wiphy);
bool wiphy_can_offchannel_tx(struct wiphy *wiphy);
const char *wiphy_get_driver(struct wiphy *wiphy);
const uint8_t *wiphy_get_permanent_address(struct wiphy *wiphy);
uint32_t wiphy_state_watch_add(struct wiphy *wiphy,
wiphy_state_watch_func_t func, void *user_data,