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wiphy: Parse driver extended capabilities

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This commit is contained in:
Denis Kenzior 2019-07-10 10:53:07 -05:00
parent c60b0ed3cf
commit 37610cf868
2 changed files with 70 additions and 0 deletions
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68
src/wiphy.c
View File

@ -50,6 +50,8 @@
#include "src/common.h"
#include "src/watchlist.h"
#define EXT_CAP_LEN 10
static struct l_genl_family *nl80211 = NULL;
static struct l_hwdb *hwdb;
static char **whitelist_filter;
@ -70,6 +72,8 @@ struct wiphy {
char *vendor_str;
char *driver_str;
struct watchlist state_watches;
uint8_t extended_capabilities[EXT_CAP_LEN + 2]; /* max bitmap size + IE header */
uint8_t *iftype_extended_capabilities[NUM_NL80211_IFTYPES];
bool support_scheduled_scan:1;
bool support_rekey_offload:1;
@ -188,6 +192,8 @@ static struct wiphy *wiphy_new(uint32_t id)
wiphy->id = id;
wiphy->supported_freqs = scan_freq_set_new();
watchlist_init(&wiphy->state_watches, NULL);
wiphy->extended_capabilities[0] = IE_TYPE_EXTENDED_CAPABILITIES;
wiphy->extended_capabilities[1] = EXT_CAP_LEN;
return wiphy;
}
@ -195,9 +201,13 @@ static struct wiphy *wiphy_new(uint32_t id)
static void wiphy_free(void *data)
{
struct wiphy *wiphy = data;
uint32_t i;
l_debug("Freeing wiphy %s[%u]", wiphy->name, wiphy->id);
for (i = 0; i < NUM_NL80211_IFTYPES; i++)
l_free(wiphy->iftype_extended_capabilities[i]);
scan_freq_set_free(wiphy->supported_freqs);
watchlist_destroy(&wiphy->state_watches);
l_free(wiphy->model_str);
@ -367,6 +377,15 @@ const uint8_t *wiphy_get_permanent_address(struct wiphy *wiphy)
return wiphy->permanent_addr;
}
const uint8_t *wiphy_get_extended_capabilities(struct wiphy *wiphy,
uint32_t iftype)
{
if (wiphy->iftype_extended_capabilities[iftype])
return wiphy->iftype_extended_capabilities[iftype];
return wiphy->extended_capabilities;
}
void wiphy_generate_random_address(struct wiphy *wiphy, uint8_t addr[static 6])
{
switch (mac_randomize_bytes) {
@ -625,6 +644,45 @@ static void parse_supported_iftypes(struct wiphy *wiphy,
}
}
static void parse_iftype_extended_capabilities(struct wiphy *wiphy,
struct l_genl_attr *attr)
{
uint16_t type;
uint16_t len;
const void *data;
struct l_genl_attr nested;
while (l_genl_attr_next(attr, &type, &len, &data)) {
uint32_t iftype;
if (!l_genl_attr_recurse(attr, &nested))
continue;
if (!l_genl_attr_next(&nested, &type, &len, &data))
continue;
if (type != NL80211_ATTR_IFTYPE)
continue;
iftype = l_get_u32(data);
if (!l_genl_attr_next(&nested, &type, &len, &data))
continue;
if (type != NL80211_ATTR_EXT_CAPA)
continue;
wiphy->iftype_extended_capabilities[iftype] =
l_new(uint8_t, EXT_CAP_LEN + 2);
wiphy->iftype_extended_capabilities[iftype][0] =
IE_TYPE_EXTENDED_CAPABILITIES;
wiphy->iftype_extended_capabilities[iftype][1] =
EXT_CAP_LEN;
memcpy(wiphy->iftype_extended_capabilities[iftype] + 2,
data, minsize(len, EXT_CAP_LEN));
}
}
static void wiphy_parse_attributes(struct wiphy *wiphy,
struct l_genl_attr *attr)
{
@ -677,6 +735,16 @@ static void wiphy_parse_attributes(struct wiphy *wiphy,
case NL80211_ATTR_OFFCHANNEL_TX_OK:
wiphy->offchannel_tx_ok = true;
break;
case NL80211_ATTR_EXT_CAPA:
memcpy(wiphy->extended_capabilities + 2,
data, minsize(EXT_CAP_LEN, len));
break;
case NL80211_ATTR_IFTYPE_EXT_CAPA:
if (!l_genl_attr_recurse(attr, &nested))
break;
parse_iftype_extended_capabilities(wiphy, &nested);
break;
}
}
}

2
src/wiphy.h
View File

@ -72,6 +72,8 @@ bool wiphy_can_offchannel_tx(struct wiphy *wiphy);
const char *wiphy_get_driver(struct wiphy *wiphy);
const char *wiphy_get_name(struct wiphy *wiphy);
const uint8_t *wiphy_get_permanent_address(struct wiphy *wiphy);
const uint8_t *wiphy_get_extended_capabilities(struct wiphy *wiphy,
uint32_t iftype);
void wiphy_generate_random_address(struct wiphy *wiphy, uint8_t addr[static 6]);