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netdev: Obtain operating channel info

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Prior to starting the 4-way handshake, obtain operating channel
information (OCI) for possible operating channel validation (OCV)
processing.
This commit is contained in:
Denis Kenzior 2021-09-18 20:11:46 -05:00
parent 2aded60c94
commit 06482b8116
1 changed files with 59 additions and 5 deletions
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64
src/netdev.c
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@ -64,6 +64,7 @@
#include "src/auth-proto.h"
#include "src/frame-xchg.h"
#include "src/diagnostic.h"
#include "src/band.h"
#ifndef ENOTSUPP
#define ENOTSUPP 524
@ -129,6 +130,7 @@ struct netdev {
uint32_t rekey_offload_cmd_id;
uint32_t qos_map_cmd_id;
uint32_t mac_change_cmd_id;
uint32_t get_oci_cmd_id;
enum netdev_result result;
uint16_t last_code; /* reason or status, depending on result */
struct l_timeout *neighbor_report_timeout;
@ -923,6 +925,11 @@ static void netdev_free(void *data)
netdev->get_station_cmd_id = 0;
}
if (netdev->get_oci_cmd_id) {
l_genl_family_cancel(nl80211, netdev->get_oci_cmd_id);
netdev->get_oci_cmd_id = 0;
}
if (netdev->fw_roam_bss)
scan_bss_free(netdev->fw_roam_bss);
@ -2038,6 +2045,57 @@ static void netdev_send_qos_map_set(struct netdev *netdev,
netdev, NULL);
}
static void netdev_get_oci_cb(struct l_genl_msg *msg, void *user_data)
{
struct netdev *netdev = user_data;
int err = l_genl_msg_get_error(msg);
_auto_(l_free) struct band_chandef *chandef =
l_new(struct band_chandef, 1);
netdev->get_oci_cmd_id = 0;
if (err < 0) {
const char *ext_error = l_genl_msg_get_extended_error(msg);
l_error("Could not get OCI info: %s",
ext_error ? ext_error : strerror(-err));
goto done;
}
if (nl80211_parse_chandef(msg, chandef) < 0) {
l_debug("Couldn't parse operating channel info.");
goto done;
}
l_debug("Obtained OCI: freq: %u, width: %u, center1: %u, center2: %u",
chandef->frequency, chandef->channel_width,
chandef->center1_frequency, chandef->center2_frequency);
handshake_state_set_chandef(netdev->handshake, l_steal_ptr(chandef));
done:
L_WARN_ON(!eapol_start(netdev->sm));
}
static int netdev_get_oci(struct netdev *netdev)
{
struct l_genl_msg *msg =
l_genl_msg_new_sized(NL80211_CMD_GET_INTERFACE, 64);
l_genl_msg_append_attr(msg, NL80211_ATTR_IFINDEX, 4, &netdev->index);
netdev->get_oci_cmd_id = l_genl_family_send(nl80211, msg,
netdev_get_oci_cb, netdev,
NULL);
if (!netdev->get_oci_cmd_id) {
l_genl_msg_unref(msg);
return -EIO;
}
return 0;
}
static void parse_request_ies(struct netdev *netdev, const uint8_t *ies,
size_t ies_len)
{
@ -2523,11 +2581,7 @@ process_resp_ies:
}
if (netdev->sm) {
/*
* Start processing EAPoL frames now that the state machine
* has all the input data even in FT mode.
*/
if (L_WARN_ON(!eapol_start(netdev->sm)))
if (netdev_get_oci(netdev) < 0)
goto deauth;
return;