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fragattacks/src/p2p/p2p.c
Jouni Malinen 85b4eac364 P2P: Do not reply to 802.11b-only Probe Request frames as GO 
If AP mode SME/MLME within wpa_supplicant is used for processing Probe
Request frames in GO mode, drop Probe Request frames that include only
802.11b rates per P2P spec section 2.4.1.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2013-06-19 19:16:23 +03:00

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/*
* Wi-Fi Direct - P2P module
* Copyright (c) 2009-2010, Atheros Communications
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#include "includes.h"
#include "common.h"
#include "eloop.h"
#include "common/ieee802_11_defs.h"
#include "common/ieee802_11_common.h"
#include "wps/wps_i.h"
#include "p2p_i.h"
#include "p2p.h"
static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx);
static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev);
static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
const u8 *sa, const u8 *data, size_t len,
int rx_freq);
static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
const u8 *sa, const u8 *data,
size_t len);
static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx);
static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx);
/*
* p2p_scan recovery timeout
*
* Many drivers are using 30 second timeout on scan results. Allow a bit larger
* timeout for this to avoid hitting P2P timeout unnecessarily.
*/
#define P2P_SCAN_TIMEOUT 35
/**
* P2P_PEER_EXPIRATION_AGE - Number of seconds after which inactive peer
* entries will be removed
*/
#define P2P_PEER_EXPIRATION_AGE 300
#define P2P_PEER_EXPIRATION_INTERVAL (P2P_PEER_EXPIRATION_AGE / 2)
static void p2p_expire_peers(struct p2p_data *p2p)
{
struct p2p_device *dev, *n;
struct os_time now;
size_t i;
os_get_time(&now);
dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
if (dev->last_seen.sec + P2P_PEER_EXPIRATION_AGE >= now.sec)
continue;
if (p2p->cfg->go_connected &&
p2p->cfg->go_connected(p2p->cfg->cb_ctx,
dev->info.p2p_device_addr)) {
/*
* We are connected as a client to a group in which the
* peer is the GO, so do not expire the peer entry.
*/
os_get_time(&dev->last_seen);
continue;
}
for (i = 0; i < p2p->num_groups; i++) {
if (p2p_group_is_client_connected(
p2p->groups[i], dev->info.p2p_device_addr))
break;
}
if (i < p2p->num_groups) {
/*
* The peer is connected as a client in a group where
* we are the GO, so do not expire the peer entry.
*/
os_get_time(&dev->last_seen);
continue;
}
p2p_dbg(p2p, "Expiring old peer entry " MACSTR,
MAC2STR(dev->info.p2p_device_addr));
dl_list_del(&dev->list);
p2p_device_free(p2p, dev);
}
}
static void p2p_expiration_timeout(void *eloop_ctx, void *timeout_ctx)
{
struct p2p_data *p2p = eloop_ctx;
p2p_expire_peers(p2p);
eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0,
p2p_expiration_timeout, p2p, NULL);
}
static const char * p2p_state_txt(int state)
{
switch (state) {
case P2P_IDLE:
return "IDLE";
case P2P_SEARCH:
return "SEARCH";
case P2P_CONNECT:
return "CONNECT";
case P2P_CONNECT_LISTEN:
return "CONNECT_LISTEN";
case P2P_GO_NEG:
return "GO_NEG";
case P2P_LISTEN_ONLY:
return "LISTEN_ONLY";
case P2P_WAIT_PEER_CONNECT:
return "WAIT_PEER_CONNECT";
case P2P_WAIT_PEER_IDLE:
return "WAIT_PEER_IDLE";
case P2P_SD_DURING_FIND:
return "SD_DURING_FIND";
case P2P_PROVISIONING:
return "PROVISIONING";
case P2P_PD_DURING_FIND:
return "PD_DURING_FIND";
case P2P_INVITE:
return "INVITE";
case P2P_INVITE_LISTEN:
return "INVITE_LISTEN";
case P2P_SEARCH_WHEN_READY:
return "SEARCH_WHEN_READY";
case P2P_CONTINUE_SEARCH_WHEN_READY:
return "CONTINUE_SEARCH_WHEN_READY";
default:
return "?";
}
}
u16 p2p_get_provisioning_info(struct p2p_data *p2p, const u8 *addr)
{
struct p2p_device *dev = NULL;
if (!addr || !p2p)
return 0;
dev = p2p_get_device(p2p, addr);
if (dev)
return dev->wps_prov_info;
else
return 0;
}
void p2p_clear_provisioning_info(struct p2p_data *p2p, const u8 *addr)
{
struct p2p_device *dev = NULL;
if (!addr || !p2p)
return;
dev = p2p_get_device(p2p, addr);
if (dev)
dev->wps_prov_info = 0;
}
void p2p_set_state(struct p2p_data *p2p, int new_state)
{
p2p_dbg(p2p, "State %s -> %s",
p2p_state_txt(p2p->state), p2p_state_txt(new_state));
p2p->state = new_state;
}
void p2p_set_timeout(struct p2p_data *p2p, unsigned int sec, unsigned int usec)
{
p2p_dbg(p2p, "Set timeout (state=%s): %u.%06u sec",
p2p_state_txt(p2p->state), sec, usec);
eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
eloop_register_timeout(sec, usec, p2p_state_timeout, p2p, NULL);
}
void p2p_clear_timeout(struct p2p_data *p2p)
{
p2p_dbg(p2p, "Clear timeout (state=%s)", p2p_state_txt(p2p->state));
eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
}
void p2p_go_neg_failed(struct p2p_data *p2p, struct p2p_device *peer,
int status)
{
struct p2p_go_neg_results res;
p2p_clear_timeout(p2p);
p2p_set_state(p2p, P2P_IDLE);
if (p2p->go_neg_peer) {
p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
p2p->go_neg_peer->wps_method = WPS_NOT_READY;
}
p2p->go_neg_peer = NULL;
os_memset(&res, 0, sizeof(res));
res.status = status;
if (peer) {
os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr,
ETH_ALEN);
os_memcpy(res.peer_interface_addr, peer->intended_addr,
ETH_ALEN);
}
p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
}
static void p2p_listen_in_find(struct p2p_data *p2p, int dev_disc)
{
unsigned int r, tu;
int freq;
struct wpabuf *ies;
p2p_dbg(p2p, "Starting short listen state (state=%s)",
p2p_state_txt(p2p->state));
freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
if (freq < 0) {
p2p_dbg(p2p, "Unknown regulatory class/channel");
return;
}
os_get_random((u8 *) &r, sizeof(r));
tu = (r % ((p2p->max_disc_int - p2p->min_disc_int) + 1) +
p2p->min_disc_int) * 100;
if (p2p->max_disc_tu >= 0 && tu > (unsigned int) p2p->max_disc_tu)
tu = p2p->max_disc_tu;
if (!dev_disc && tu < 100)
tu = 100; /* Need to wait in non-device discovery use cases */
if (p2p->cfg->max_listen && 1024 * tu / 1000 > p2p->cfg->max_listen)
tu = p2p->cfg->max_listen * 1000 / 1024;
if (tu == 0) {
p2p_dbg(p2p, "Skip listen state since duration was 0 TU");
p2p_set_timeout(p2p, 0, 0);
return;
}
p2p->pending_listen_freq = freq;
p2p->pending_listen_sec = 0;
p2p->pending_listen_usec = 1024 * tu;
ies = p2p_build_probe_resp_ies(p2p);
if (ies == NULL)
return;
if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, 1024 * tu / 1000,
ies) < 0) {
p2p_dbg(p2p, "Failed to start listen mode");
p2p->pending_listen_freq = 0;
}
wpabuf_free(ies);
}
int p2p_listen(struct p2p_data *p2p, unsigned int timeout)
{
int freq;
struct wpabuf *ies;
p2p_dbg(p2p, "Going to listen(only) state");
freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
if (freq < 0) {
p2p_dbg(p2p, "Unknown regulatory class/channel");
return -1;
}
p2p->pending_listen_freq = freq;
p2p->pending_listen_sec = timeout / 1000;
p2p->pending_listen_usec = (timeout % 1000) * 1000;
if (p2p->p2p_scan_running) {
if (p2p->start_after_scan == P2P_AFTER_SCAN_CONNECT) {
p2p_dbg(p2p, "p2p_scan running - connect is already pending - skip listen");
return 0;
}
p2p_dbg(p2p, "p2p_scan running - delay start of listen state");
p2p->start_after_scan = P2P_AFTER_SCAN_LISTEN;
return 0;
}
ies = p2p_build_probe_resp_ies(p2p);
if (ies == NULL)
return -1;
if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, timeout, ies) < 0) {
p2p_dbg(p2p, "Failed to start listen mode");
p2p->pending_listen_freq = 0;
wpabuf_free(ies);
return -1;
}
wpabuf_free(ies);
p2p_set_state(p2p, P2P_LISTEN_ONLY);
return 0;
}
static void p2p_device_clear_reported(struct p2p_data *p2p)
{
struct p2p_device *dev;
dl_list_for_each(dev, &p2p->devices, struct p2p_device, list)
dev->flags &= ~P2P_DEV_REPORTED;
}
/**
* p2p_get_device - Fetch a peer entry
* @p2p: P2P module context from p2p_init()
* @addr: P2P Device Address of the peer
* Returns: Pointer to the device entry or %NULL if not found
*/
struct p2p_device * p2p_get_device(struct p2p_data *p2p, const u8 *addr)
{
struct p2p_device *dev;
dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
if (os_memcmp(dev->info.p2p_device_addr, addr, ETH_ALEN) == 0)
return dev;
}
return NULL;
}
/**
* p2p_get_device_interface - Fetch a peer entry based on P2P Interface Address
* @p2p: P2P module context from p2p_init()
* @addr: P2P Interface Address of the peer
* Returns: Pointer to the device entry or %NULL if not found
*/
struct p2p_device * p2p_get_device_interface(struct p2p_data *p2p,
const u8 *addr)
{
struct p2p_device *dev;
dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
if (os_memcmp(dev->interface_addr, addr, ETH_ALEN) == 0)
return dev;
}
return NULL;
}
/**
* p2p_create_device - Create a peer entry
* @p2p: P2P module context from p2p_init()
* @addr: P2P Device Address of the peer
* Returns: Pointer to the device entry or %NULL on failure
*
* If there is already an entry for the peer, it will be returned instead of
* creating a new one.
*/
static struct p2p_device * p2p_create_device(struct p2p_data *p2p,
const u8 *addr)
{
struct p2p_device *dev, *oldest = NULL;
size_t count = 0;
dev = p2p_get_device(p2p, addr);
if (dev)
return dev;
dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
count++;
if (oldest == NULL ||
os_time_before(&dev->last_seen, &oldest->last_seen))
oldest = dev;
}
if (count + 1 > p2p->cfg->max_peers && oldest) {
p2p_dbg(p2p, "Remove oldest peer entry to make room for a new peer");
dl_list_del(&oldest->list);
p2p_device_free(p2p, oldest);
}
dev = os_zalloc(sizeof(*dev));
if (dev == NULL)
return NULL;
dl_list_add(&p2p->devices, &dev->list);
os_memcpy(dev->info.p2p_device_addr, addr, ETH_ALEN);
return dev;
}
static void p2p_copy_client_info(struct p2p_device *dev,
struct p2p_client_info *cli)
{
os_memcpy(dev->info.device_name, cli->dev_name, cli->dev_name_len);
dev->info.device_name[cli->dev_name_len] = '\0';
dev->info.dev_capab = cli->dev_capab;
dev->info.config_methods = cli->config_methods;
os_memcpy(dev->info.pri_dev_type, cli->pri_dev_type, 8);
dev->info.wps_sec_dev_type_list_len = 8 * cli->num_sec_dev_types;
os_memcpy(dev->info.wps_sec_dev_type_list, cli->sec_dev_types,
dev->info.wps_sec_dev_type_list_len);
}
static int p2p_add_group_clients(struct p2p_data *p2p, const u8 *go_dev_addr,
const u8 *go_interface_addr, int freq,
const u8 *gi, size_t gi_len)
{
struct p2p_group_info info;
size_t c;
struct p2p_device *dev;
if (gi == NULL)
return 0;
if (p2p_group_info_parse(gi, gi_len, &info) < 0)
return -1;
/*
* Clear old data for this group; if the devices are still in the
* group, the information will be restored in the loop following this.
*/
dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
if (os_memcmp(dev->member_in_go_iface, go_interface_addr,
ETH_ALEN) == 0) {
os_memset(dev->member_in_go_iface, 0, ETH_ALEN);
os_memset(dev->member_in_go_dev, 0, ETH_ALEN);
}
}
for (c = 0; c < info.num_clients; c++) {
struct p2p_client_info *cli = &info.client[c];
if (os_memcmp(cli->p2p_device_addr, p2p->cfg->dev_addr,
ETH_ALEN) == 0)
continue; /* ignore our own entry */
dev = p2p_get_device(p2p, cli->p2p_device_addr);
if (dev) {
if (dev->flags & (P2P_DEV_GROUP_CLIENT_ONLY |
P2P_DEV_PROBE_REQ_ONLY)) {
/*
* Update information since we have not
* received this directly from the client.
*/
p2p_copy_client_info(dev, cli);
} else {
/*
* Need to update P2P Client Discoverability
* flag since it is valid only in P2P Group
* Info attribute.
*/
dev->info.dev_capab &=
~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
dev->info.dev_capab |=
cli->dev_capab &
P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
}
if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
}
} else {
dev = p2p_create_device(p2p, cli->p2p_device_addr);
if (dev == NULL)
continue;
dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
p2p_copy_client_info(dev, cli);
dev->oper_freq = freq;
p2p->cfg->dev_found(p2p->cfg->cb_ctx,
dev->info.p2p_device_addr,
&dev->info, 1);
dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
}
os_memcpy(dev->interface_addr, cli->p2p_interface_addr,
ETH_ALEN);
os_get_time(&dev->last_seen);
os_memcpy(dev->member_in_go_dev, go_dev_addr, ETH_ALEN);
os_memcpy(dev->member_in_go_iface, go_interface_addr,
ETH_ALEN);
}
return 0;
}
static void p2p_copy_wps_info(struct p2p_data *p2p, struct p2p_device *dev,
int probe_req, const struct p2p_message *msg)
{
os_memcpy(dev->info.device_name, msg->device_name,
sizeof(dev->info.device_name));
if (msg->manufacturer &&
msg->manufacturer_len < sizeof(dev->info.manufacturer)) {
os_memset(dev->info.manufacturer, 0,
sizeof(dev->info.manufacturer));
os_memcpy(dev->info.manufacturer, msg->manufacturer,
msg->manufacturer_len);
}
if (msg->model_name &&
msg->model_name_len < sizeof(dev->info.model_name)) {
os_memset(dev->info.model_name, 0,
sizeof(dev->info.model_name));
os_memcpy(dev->info.model_name, msg->model_name,
msg->model_name_len);
}
if (msg->model_number &&
msg->model_number_len < sizeof(dev->info.model_number)) {
os_memset(dev->info.model_number, 0,
sizeof(dev->info.model_number));
os_memcpy(dev->info.model_number, msg->model_number,
msg->model_number_len);
}
if (msg->serial_number &&
msg->serial_number_len < sizeof(dev->info.serial_number)) {
os_memset(dev->info.serial_number, 0,
sizeof(dev->info.serial_number));
os_memcpy(dev->info.serial_number, msg->serial_number,
msg->serial_number_len);
}
if (msg->pri_dev_type)
os_memcpy(dev->info.pri_dev_type, msg->pri_dev_type,
sizeof(dev->info.pri_dev_type));
else if (msg->wps_pri_dev_type)
os_memcpy(dev->info.pri_dev_type, msg->wps_pri_dev_type,
sizeof(dev->info.pri_dev_type));
if (msg->wps_sec_dev_type_list) {
os_memcpy(dev->info.wps_sec_dev_type_list,
msg->wps_sec_dev_type_list,
msg->wps_sec_dev_type_list_len);
dev->info.wps_sec_dev_type_list_len =
msg->wps_sec_dev_type_list_len;
}
if (msg->capability) {
/*
* P2P Client Discoverability bit is reserved in all frames
* that use this function, so do not change its value here.
*/
dev->info.dev_capab &= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
dev->info.dev_capab |= msg->capability[0] &
~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
dev->info.group_capab = msg->capability[1];
}
if (msg->ext_listen_timing) {
dev->ext_listen_period = WPA_GET_LE16(msg->ext_listen_timing);
dev->ext_listen_interval =
WPA_GET_LE16(msg->ext_listen_timing + 2);
}
if (!probe_req) {
u16 new_config_methods;
new_config_methods = msg->config_methods ?
msg->config_methods : msg->wps_config_methods;
if (new_config_methods &&
dev->info.config_methods != new_config_methods) {
p2p_dbg(p2p, "Update peer " MACSTR
" config_methods 0x%x -> 0x%x",
MAC2STR(dev->info.p2p_device_addr),
dev->info.config_methods,
new_config_methods);
dev->info.config_methods = new_config_methods;
}
}
}
/**
* p2p_add_device - Add peer entries based on scan results or P2P frames
* @p2p: P2P module context from p2p_init()
* @addr: Source address of Beacon or Probe Response frame (may be either
* P2P Device Address or P2P Interface Address)
* @level: Signal level (signal strength of the received frame from the peer)
* @freq: Frequency on which the Beacon or Probe Response frame was received
* @rx_time: Time when the result was received
* @ies: IEs from the Beacon or Probe Response frame
* @ies_len: Length of ies buffer in octets
* @scan_res: Whether this was based on scan results
* Returns: 0 on success, -1 on failure
*
* If the scan result is for a GO, the clients in the group will also be added
* to the peer table. This function can also be used with some other frames
* like Provision Discovery Request that contains P2P Capability and P2P Device
* Info attributes.
*/
int p2p_add_device(struct p2p_data *p2p, const u8 *addr, int freq,
struct os_time *rx_time, int level, const u8 *ies,
size_t ies_len, int scan_res)
{
struct p2p_device *dev;
struct p2p_message msg;
const u8 *p2p_dev_addr;
int i;
struct os_time time_now;
os_memset(&msg, 0, sizeof(msg));
if (p2p_parse_ies(ies, ies_len, &msg)) {
p2p_dbg(p2p, "Failed to parse P2P IE for a device entry");
p2p_parse_free(&msg);
return -1;
}
if (msg.p2p_device_addr)
p2p_dev_addr = msg.p2p_device_addr;
else if (msg.device_id)
p2p_dev_addr = msg.device_id;
else {
p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
p2p_parse_free(&msg);
return -1;
}
if (!is_zero_ether_addr(p2p->peer_filter) &&
os_memcmp(p2p_dev_addr, p2p->peer_filter, ETH_ALEN) != 0) {
p2p_dbg(p2p, "Do not add peer filter for " MACSTR
" due to peer filter", MAC2STR(p2p_dev_addr));
p2p_parse_free(&msg);
return 0;
}
dev = p2p_create_device(p2p, p2p_dev_addr);
if (dev == NULL) {
p2p_parse_free(&msg);
return -1;
}
if (rx_time == NULL) {
os_get_time(&time_now);
rx_time = &time_now;
}
/*
* Update the device entry only if the new peer
* entry is newer than the one previously stored.
*/
if (dev->last_seen.sec > 0 &&
os_time_before(rx_time, &dev->last_seen)) {
p2p_dbg(p2p, "Do not update peer entry based on old frame (rx_time=%u.%06u last_seen=%u.%06u)",
(unsigned int) rx_time->sec,
(unsigned int) rx_time->usec,
(unsigned int) dev->last_seen.sec,
(unsigned int) dev->last_seen.usec);
p2p_parse_free(&msg);
return -1;
}
os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_time));
dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
if (os_memcmp(addr, p2p_dev_addr, ETH_ALEN) != 0)
os_memcpy(dev->interface_addr, addr, ETH_ALEN);
if (msg.ssid &&
(msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
!= 0)) {
os_memcpy(dev->oper_ssid, msg.ssid + 2, msg.ssid[1]);
dev->oper_ssid_len = msg.ssid[1];
}
if (freq >= 2412 && freq <= 2484 && msg.ds_params &&
*msg.ds_params >= 1 && *msg.ds_params <= 14) {
int ds_freq;
if (*msg.ds_params == 14)
ds_freq = 2484;
else
ds_freq = 2407 + *msg.ds_params * 5;
if (freq != ds_freq) {
p2p_dbg(p2p, "Update Listen frequency based on DS Parameter Set IE: %d -> %d MHz",
freq, ds_freq);
freq = ds_freq;
}
}
if (dev->listen_freq && dev->listen_freq != freq && scan_res) {
p2p_dbg(p2p, "Update Listen frequency based on scan results ("
MACSTR " %d -> %d MHz (DS param %d)",
MAC2STR(dev->info.p2p_device_addr), dev->listen_freq,
freq, msg.ds_params ? *msg.ds_params : -1);
}
if (scan_res) {
dev->listen_freq = freq;
if (msg.group_info)
dev->oper_freq = freq;
}
dev->info.level = level;
p2p_copy_wps_info(p2p, dev, 0, &msg);
for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
wpabuf_free(dev->info.wps_vendor_ext[i]);
dev->info.wps_vendor_ext[i] = NULL;
}
for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
if (msg.wps_vendor_ext[i] == NULL)
break;
dev->info.wps_vendor_ext[i] = wpabuf_alloc_copy(
msg.wps_vendor_ext[i], msg.wps_vendor_ext_len[i]);
if (dev->info.wps_vendor_ext[i] == NULL)
break;
}
if (msg.wfd_subelems) {
wpabuf_free(dev->info.wfd_subelems);
dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
}
if (scan_res) {
p2p_add_group_clients(p2p, p2p_dev_addr, addr, freq,
msg.group_info, msg.group_info_len);
}
p2p_parse_free(&msg);
if (p2p_pending_sd_req(p2p, dev))
dev->flags |= P2P_DEV_SD_SCHEDULE;
if (dev->flags & P2P_DEV_REPORTED)
return 0;
p2p_dbg(p2p, "Peer found with Listen frequency %d MHz (rx_time=%u.%06u)",
freq, (unsigned int) rx_time->sec,
(unsigned int) rx_time->usec);
if (dev->flags & P2P_DEV_USER_REJECTED) {
p2p_dbg(p2p, "Do not report rejected device");
return 0;
}
if (dev->info.config_methods == 0 &&
(freq == 2412 || freq == 2437 || freq == 2462)) {
/*
* If we have only seen a Beacon frame from a GO, we do not yet
* know what WPS config methods it supports. Since some
* applications use config_methods value from P2P-DEVICE-FOUND
* events, postpone reporting this peer until we've fully
* discovered its capabilities.
*
* At least for now, do this only if the peer was detected on
* one of the social channels since that peer can be easily be
* found again and there are no limitations of having to use
* passive scan on this channels, so this can be done through
* Probe Response frame that includes the config_methods
* information.
*/
p2p_dbg(p2p, "Do not report peer " MACSTR
" with unknown config methods", MAC2STR(addr));
return 0;
}
p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
!(dev->flags & P2P_DEV_REPORTED_ONCE));
dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
return 0;
}
static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev)
{
int i;
if (p2p->go_neg_peer == dev) {
/*
* If GO Negotiation is in progress, report that it has failed.
*/
p2p_go_neg_failed(p2p, dev, -1);
p2p->go_neg_peer = NULL;
}
if (p2p->invite_peer == dev)
p2p->invite_peer = NULL;
if (p2p->sd_peer == dev)
p2p->sd_peer = NULL;
if (p2p->pending_client_disc_go == dev)
p2p->pending_client_disc_go = NULL;
/* dev_lost() device, but only if it was previously dev_found() */
if (dev->flags & P2P_DEV_REPORTED_ONCE)
p2p->cfg->dev_lost(p2p->cfg->cb_ctx,
dev->info.p2p_device_addr);
for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
wpabuf_free(dev->info.wps_vendor_ext[i]);
dev->info.wps_vendor_ext[i] = NULL;
}
wpabuf_free(dev->info.wfd_subelems);
os_free(dev);
}
static int p2p_get_next_prog_freq(struct p2p_data *p2p)
{
struct p2p_channels *c;
struct p2p_reg_class *cla;
size_t cl, ch;
int found = 0;
u8 reg_class;
u8 channel;
int freq;
c = &p2p->cfg->channels;
for (cl = 0; cl < c->reg_classes; cl++) {
cla = &c->reg_class[cl];
if (cla->reg_class != p2p->last_prog_scan_class)
continue;
for (ch = 0; ch < cla->channels; ch++) {
if (cla->channel[ch] == p2p->last_prog_scan_chan) {
found = 1;
break;
}
}
if (found)
break;
}
if (!found) {
/* Start from beginning */
reg_class = c->reg_class[0].reg_class;
channel = c->reg_class[0].channel[0];
} else {
/* Pick the next channel */
ch++;
if (ch == cla->channels) {
cl++;
if (cl == c->reg_classes)
cl = 0;
ch = 0;
}
reg_class = c->reg_class[cl].reg_class;
channel = c->reg_class[cl].channel[ch];
}
freq = p2p_channel_to_freq(reg_class, channel);
p2p_dbg(p2p, "Next progressive search channel: reg_class %u channel %u -> %d MHz",
reg_class, channel, freq);
p2p->last_prog_scan_class = reg_class;
p2p->last_prog_scan_chan = channel;
if (freq == 2412 || freq == 2437 || freq == 2462)
return 0; /* No need to add social channels */
return freq;
}
static void p2p_search(struct p2p_data *p2p)
{
int freq = 0;
enum p2p_scan_type type;
u16 pw_id = DEV_PW_DEFAULT;
int res;
if (p2p->drv_in_listen) {
p2p_dbg(p2p, "Driver is still in Listen state - wait for it to end before continuing");
return;
}
p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
if (p2p->find_type == P2P_FIND_PROGRESSIVE &&
(freq = p2p_get_next_prog_freq(p2p)) > 0) {
type = P2P_SCAN_SOCIAL_PLUS_ONE;
p2p_dbg(p2p, "Starting search (+ freq %u)", freq);
} else {
type = P2P_SCAN_SOCIAL;
p2p_dbg(p2p, "Starting search");
}
res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, type, freq,
p2p->num_req_dev_types, p2p->req_dev_types,
p2p->find_dev_id, pw_id);
if (res < 0) {
p2p_dbg(p2p, "Scan request failed");
p2p_continue_find(p2p);
} else if (res == 1) {
p2p_dbg(p2p, "Could not start p2p_scan at this point - will try again after previous scan completes");
p2p_set_state(p2p, P2P_CONTINUE_SEARCH_WHEN_READY);
} else {
p2p_dbg(p2p, "Running p2p_scan");
p2p->p2p_scan_running = 1;
eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout,
p2p, NULL);
}
}
static void p2p_find_timeout(void *eloop_ctx, void *timeout_ctx)
{
struct p2p_data *p2p = eloop_ctx;
p2p_dbg(p2p, "Find timeout -> stop");
p2p_stop_find(p2p);
}
static int p2p_run_after_scan(struct p2p_data *p2p)
{
struct p2p_device *dev;
enum p2p_after_scan op;
if (p2p->after_scan_tx) {
p2p->after_scan_tx_in_progress = 1;
p2p_dbg(p2p, "Send pending Action frame at p2p_scan completion");
p2p->cfg->send_action(p2p->cfg->cb_ctx,
p2p->after_scan_tx->freq,
p2p->after_scan_tx->dst,
p2p->after_scan_tx->src,
p2p->after_scan_tx->bssid,
(u8 *) (p2p->after_scan_tx + 1),
p2p->after_scan_tx->len,
p2p->after_scan_tx->wait_time);
os_free(p2p->after_scan_tx);
p2p->after_scan_tx = NULL;
return 1;
}
op = p2p->start_after_scan;
p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
switch (op) {
case P2P_AFTER_SCAN_NOTHING:
break;
case P2P_AFTER_SCAN_LISTEN:
p2p_dbg(p2p, "Start previously requested Listen state");
p2p_listen(p2p, p2p->pending_listen_sec * 1000 +
p2p->pending_listen_usec / 1000);
return 1;
case P2P_AFTER_SCAN_CONNECT:
p2p_dbg(p2p, "Start previously requested connect with " MACSTR,
MAC2STR(p2p->after_scan_peer));
dev = p2p_get_device(p2p, p2p->after_scan_peer);
if (dev == NULL) {
p2p_dbg(p2p, "Peer not known anymore");
break;
}
p2p_connect_send(p2p, dev);
return 1;
}
return 0;
}
static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx)
{
struct p2p_data *p2p = eloop_ctx;
int running;
p2p_dbg(p2p, "p2p_scan timeout (running=%d)", p2p->p2p_scan_running);
running = p2p->p2p_scan_running;
/* Make sure we recover from missed scan results callback */
p2p->p2p_scan_running = 0;
if (running)
p2p_run_after_scan(p2p);
}
static void p2p_free_req_dev_types(struct p2p_data *p2p)
{
p2p->num_req_dev_types = 0;
os_free(p2p->req_dev_types);
p2p->req_dev_types = NULL;
}
int p2p_find(struct p2p_data *p2p, unsigned int timeout,
enum p2p_discovery_type type,
unsigned int num_req_dev_types, const u8 *req_dev_types,
const u8 *dev_id, unsigned int search_delay)
{
int res;
p2p_dbg(p2p, "Starting find (type=%d)", type);
os_get_time(&p2p->find_start);
if (p2p->p2p_scan_running) {
p2p_dbg(p2p, "p2p_scan is already running");
}
p2p_free_req_dev_types(p2p);
if (req_dev_types && num_req_dev_types) {
p2p->req_dev_types = os_malloc(num_req_dev_types *
WPS_DEV_TYPE_LEN);
if (p2p->req_dev_types == NULL)
return -1;
os_memcpy(p2p->req_dev_types, req_dev_types,
num_req_dev_types * WPS_DEV_TYPE_LEN);
p2p->num_req_dev_types = num_req_dev_types;
}
if (dev_id) {
os_memcpy(p2p->find_dev_id_buf, dev_id, ETH_ALEN);
p2p->find_dev_id = p2p->find_dev_id_buf;
} else
p2p->find_dev_id = NULL;
p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
p2p_clear_timeout(p2p);
p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
p2p->find_type = type;
p2p_device_clear_reported(p2p);
p2p_set_state(p2p, P2P_SEARCH);
p2p->search_delay = search_delay;
p2p->in_search_delay = 0;
eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
p2p->last_p2p_find_timeout = timeout;
if (timeout)
eloop_register_timeout(timeout, 0, p2p_find_timeout,
p2p, NULL);
switch (type) {
case P2P_FIND_START_WITH_FULL:
case P2P_FIND_PROGRESSIVE:
res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_FULL, 0,
p2p->num_req_dev_types,
p2p->req_dev_types, dev_id,
DEV_PW_DEFAULT);
break;
case P2P_FIND_ONLY_SOCIAL:
res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0,
p2p->num_req_dev_types,
p2p->req_dev_types, dev_id,
DEV_PW_DEFAULT);
break;
default:
return -1;
}
if (res == 0) {
p2p_dbg(p2p, "Running p2p_scan");
p2p->p2p_scan_running = 1;
eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout,
p2p, NULL);
} else if (res == 1) {
p2p_dbg(p2p, "Could not start p2p_scan at this point - will try again after previous scan completes");
res = 0;
p2p_set_state(p2p, P2P_SEARCH_WHEN_READY);
eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
} else {
p2p_dbg(p2p, "Failed to start p2p_scan");
p2p_set_state(p2p, P2P_IDLE);
eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
}
return res;
}
int p2p_other_scan_completed(struct p2p_data *p2p)
{
if (p2p->state == P2P_CONTINUE_SEARCH_WHEN_READY) {
p2p_set_state(p2p, P2P_SEARCH);
p2p_search(p2p);
return 1;
}
if (p2p->state != P2P_SEARCH_WHEN_READY)
return 0;
p2p_dbg(p2p, "Starting pending P2P find now that previous scan was completed");
if (p2p_find(p2p, p2p->last_p2p_find_timeout, p2p->find_type,
p2p->num_req_dev_types, p2p->req_dev_types,
p2p->find_dev_id, p2p->search_delay) < 0) {
p2p->cfg->find_stopped(p2p->cfg->cb_ctx);
return 0;
}
return 1;
}
void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq)
{
p2p_dbg(p2p, "Stopping find");
eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
p2p_clear_timeout(p2p);
if (p2p->state == P2P_SEARCH ||
p2p->state == P2P_CONTINUE_SEARCH_WHEN_READY ||
p2p->state == P2P_SEARCH_WHEN_READY)
p2p->cfg->find_stopped(p2p->cfg->cb_ctx);
p2p_set_state(p2p, P2P_IDLE);
p2p_free_req_dev_types(p2p);
p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
if (p2p->go_neg_peer)
p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
p2p->go_neg_peer = NULL;
p2p->sd_peer = NULL;
p2p->invite_peer = NULL;
p2p_stop_listen_for_freq(p2p, freq);
}
void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq)
{
if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) {
p2p_dbg(p2p, "Skip stop_listen since we are on correct channel for response");
return;
}
if (p2p->in_listen) {
p2p->in_listen = 0;
p2p_clear_timeout(p2p);
}
if (p2p->drv_in_listen) {
/*
* The driver may not deliver callback to p2p_listen_end()
* when the operation gets canceled, so clear the internal
* variable that is tracking driver state.
*/
p2p_dbg(p2p, "Clear drv_in_listen (%d)", p2p->drv_in_listen);
p2p->drv_in_listen = 0;
}
p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
}
void p2p_stop_find(struct p2p_data *p2p)
{
p2p_stop_find_for_freq(p2p, 0);
}
static int p2p_prepare_channel_pref(struct p2p_data *p2p,
unsigned int force_freq,
unsigned int pref_freq)
{
u8 op_class, op_channel;
unsigned int freq = force_freq ? force_freq : pref_freq;
if (p2p_freq_to_channel(freq, &op_class, &op_channel) < 0) {
p2p_dbg(p2p, "Unsupported frequency %u MHz", freq);
return -1;
}
if (!p2p_channels_includes(&p2p->cfg->channels, op_class, op_channel)) {
p2p_dbg(p2p, "Frequency %u MHz (oper_class %u channel %u) not allowed for P2P",
freq, op_class, op_channel);
return -1;
}
p2p->op_reg_class = op_class;
p2p->op_channel = op_channel;
if (force_freq) {
p2p->channels.reg_classes = 1;
p2p->channels.reg_class[0].channels = 1;
p2p->channels.reg_class[0].reg_class = p2p->op_reg_class;
p2p->channels.reg_class[0].channel[0] = p2p->op_channel;
} else {
os_memcpy(&p2p->channels, &p2p->cfg->channels,
sizeof(struct p2p_channels));
}
return 0;
}
static void p2p_prepare_channel_best(struct p2p_data *p2p)
{
u8 op_class, op_channel;
if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 &&
p2p_supported_freq(p2p, p2p->best_freq_overall) &&
p2p_freq_to_channel(p2p->best_freq_overall, &op_class, &op_channel)
== 0) {
p2p_dbg(p2p, "Select best overall channel as operating channel preference");
p2p->op_reg_class = op_class;
p2p->op_channel = op_channel;
} else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 &&
p2p_supported_freq(p2p, p2p->best_freq_5) &&
p2p_freq_to_channel(p2p->best_freq_5, &op_class, &op_channel)
== 0) {
p2p_dbg(p2p, "Select best 5 GHz channel as operating channel preference");
p2p->op_reg_class = op_class;
p2p->op_channel = op_channel;
} else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_24 > 0 &&
p2p_supported_freq(p2p, p2p->best_freq_24) &&
p2p_freq_to_channel(p2p->best_freq_24, &op_class,
&op_channel) == 0) {
p2p_dbg(p2p, "Select best 2.4 GHz channel as operating channel preference");
p2p->op_reg_class = op_class;
p2p->op_channel = op_channel;
} else {
p2p->op_reg_class = p2p->cfg->op_reg_class;
p2p->op_channel = p2p->cfg->op_channel;
}
os_memcpy(&p2p->channels, &p2p->cfg->channels,
sizeof(struct p2p_channels));
}
/**
* p2p_prepare_channel - Select operating channel for GO Negotiation
* @p2p: P2P module context from p2p_init()
* @dev: Selected peer device
* @force_freq: Forced frequency in MHz or 0 if not forced
* @pref_freq: Preferred frequency in MHz or 0 if no preference
* Returns: 0 on success, -1 on failure (channel not supported for P2P)
*
* This function is used to do initial operating channel selection for GO
* Negotiation prior to having received peer information. The selected channel
* may be further optimized in p2p_reselect_channel() once the peer information
* is available.
*/
int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev,
unsigned int force_freq, unsigned int pref_freq)
{
if (force_freq || pref_freq) {
if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq) < 0)
return -1;
} else {
p2p_prepare_channel_best(p2p);
}
p2p_dbg(p2p, "Own preference for operation channel: Operating Class %u Channel %u%s",
p2p->op_reg_class, p2p->op_channel,
force_freq ? " (forced)" : "");
if (force_freq)
dev->flags |= P2P_DEV_FORCE_FREQ;
else
dev->flags &= ~P2P_DEV_FORCE_FREQ;
return 0;
}
static void p2p_set_dev_persistent(struct p2p_device *dev,
int persistent_group)
{
switch (persistent_group) {
case 0:
dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP |
P2P_DEV_PREFER_PERSISTENT_RECONN);
break;
case 1:
dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP;
dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN;
break;
case 2:
dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP |
P2P_DEV_PREFER_PERSISTENT_RECONN;
break;
}
}
int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr,
enum p2p_wps_method wps_method,
int go_intent, const u8 *own_interface_addr,
unsigned int force_freq, int persistent_group,
const u8 *force_ssid, size_t force_ssid_len,
int pd_before_go_neg, unsigned int pref_freq)
{
struct p2p_device *dev;
p2p_dbg(p2p, "Request to start group negotiation - peer=" MACSTR
" GO Intent=%d Intended Interface Address=" MACSTR
" wps_method=%d persistent_group=%d pd_before_go_neg=%d",
MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
wps_method, persistent_group, pd_before_go_neg);
dev = p2p_get_device(p2p, peer_addr);
if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) {
p2p_dbg(p2p, "Cannot connect to unknown P2P Device " MACSTR,
MAC2STR(peer_addr));
return -1;
}
if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq) < 0)
return -1;
if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) {
if (!(dev->info.dev_capab &
P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) {
p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
" that is in a group and is not discoverable",
MAC2STR(peer_addr));
return -1;
}
if (dev->oper_freq <= 0) {
p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
" with incomplete information",
MAC2STR(peer_addr));
return -1;
}
/*
* First, try to connect directly. If the peer does not
* acknowledge frames, assume it is sleeping and use device
* discoverability via the GO at that point.
*/
}
p2p->ssid_set = 0;
if (force_ssid) {
wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
force_ssid, force_ssid_len);
os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
p2p->ssid_len = force_ssid_len;
p2p->ssid_set = 1;
}
dev->flags &= ~P2P_DEV_NOT_YET_READY;
dev->flags &= ~P2P_DEV_USER_REJECTED;
dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
if (pd_before_go_neg)
dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG;
else {
dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG;
/*
* Assign dialog token and tie breaker here to use the same
* values in each retry within the same GO Negotiation exchange.
*/
dev->dialog_token++;
if (dev->dialog_token == 0)
dev->dialog_token = 1;
dev->tie_breaker = p2p->next_tie_breaker;
p2p->next_tie_breaker = !p2p->next_tie_breaker;
}
dev->connect_reqs = 0;
dev->go_neg_req_sent = 0;
dev->go_state = UNKNOWN_GO;
p2p_set_dev_persistent(dev, persistent_group);
p2p->go_intent = go_intent;
os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
if (p2p->state != P2P_IDLE)
p2p_stop_find(p2p);
if (p2p->after_scan_tx) {
/*
* We need to drop the pending frame to avoid issues with the
* new GO Negotiation, e.g., when the pending frame was from a
* previous attempt at starting a GO Negotiation.
*/
p2p_dbg(p2p, "Dropped previous pending Action frame TX that was waiting for p2p_scan completion");
os_free(p2p->after_scan_tx);
p2p->after_scan_tx = NULL;
}
dev->wps_method = wps_method;
dev->status = P2P_SC_SUCCESS;
if (p2p->p2p_scan_running) {
p2p_dbg(p2p, "p2p_scan running - delay connect send");
p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT;
os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN);
return 0;
}
p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
return p2p_connect_send(p2p, dev);
}
int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr,
enum p2p_wps_method wps_method,
int go_intent, const u8 *own_interface_addr,
unsigned int force_freq, int persistent_group,
const u8 *force_ssid, size_t force_ssid_len,
unsigned int pref_freq)
{
struct p2p_device *dev;
p2p_dbg(p2p, "Request to authorize group negotiation - peer=" MACSTR
" GO Intent=%d Intended Interface Address=" MACSTR
" wps_method=%d persistent_group=%d",
MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
wps_method, persistent_group);
dev = p2p_get_device(p2p, peer_addr);
if (dev == NULL) {
p2p_dbg(p2p, "Cannot authorize unknown P2P Device " MACSTR,
MAC2STR(peer_addr));
return -1;
}
if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq) < 0)
return -1;
p2p->ssid_set = 0;
if (force_ssid) {
wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
force_ssid, force_ssid_len);
os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
p2p->ssid_len = force_ssid_len;
p2p->ssid_set = 1;
}
dev->flags &= ~P2P_DEV_NOT_YET_READY;
dev->flags &= ~P2P_DEV_USER_REJECTED;
dev->go_neg_req_sent = 0;
dev->go_state = UNKNOWN_GO;
p2p_set_dev_persistent(dev, persistent_group);
p2p->go_intent = go_intent;
os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
dev->wps_method = wps_method;
dev->status = P2P_SC_SUCCESS;
return 0;
}
void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr,
struct p2p_device *dev, struct p2p_message *msg)
{
os_get_time(&dev->last_seen);
p2p_copy_wps_info(p2p, dev, 0, msg);
if (msg->listen_channel) {
int freq;
freq = p2p_channel_to_freq(msg->listen_channel[3],
msg->listen_channel[4]);
if (freq < 0) {
p2p_dbg(p2p, "Unknown peer Listen channel: "
"country=%c%c(0x%02x) reg_class=%u channel=%u",
msg->listen_channel[0],
msg->listen_channel[1],
msg->listen_channel[2],
msg->listen_channel[3],
msg->listen_channel[4]);
} else {
p2p_dbg(p2p, "Update peer " MACSTR
" Listen channel: %u -> %u MHz",
MAC2STR(dev->info.p2p_device_addr),
dev->listen_freq, freq);
dev->listen_freq = freq;
}
}
if (msg->wfd_subelems) {
wpabuf_free(dev->info.wfd_subelems);
dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems);
}
if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
p2p_dbg(p2p, "Completed device entry based on data from GO Negotiation Request");
} else {
p2p_dbg(p2p, "Created device entry based on GO Neg Req: "
MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' "
"listen_freq=%d",
MAC2STR(dev->info.p2p_device_addr),
dev->info.dev_capab, dev->info.group_capab,
dev->info.device_name, dev->listen_freq);
}
dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY;
if (dev->flags & P2P_DEV_USER_REJECTED) {
p2p_dbg(p2p, "Do not report rejected device");
return;
}
p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
!(dev->flags & P2P_DEV_REPORTED_ONCE));
dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
}
void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len)
{
os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2);
os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2],
p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len);
*ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len;
}
int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params)
{
p2p_build_ssid(p2p, params->ssid, &params->ssid_len);
p2p_random(params->passphrase, 8);
return 0;
}
void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer)
{
struct p2p_go_neg_results res;
int go = peer->go_state == LOCAL_GO;
struct p2p_channels intersection;
int freqs;
size_t i, j;
p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)",
MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer");
os_memset(&res, 0, sizeof(res));
res.role_go = go;
os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
res.wps_method = peer->wps_method;
if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) {
if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN)
res.persistent_group = 2;
else
res.persistent_group = 1;
}
if (go) {
/* Setup AP mode for WPS provisioning */
res.freq = p2p_channel_to_freq(p2p->op_reg_class,
p2p->op_channel);
os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
res.ssid_len = p2p->ssid_len;
p2p_random(res.passphrase, 8);
} else {
res.freq = peer->oper_freq;
if (p2p->ssid_len) {
os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
res.ssid_len = p2p->ssid_len;
}
}
p2p_channels_intersect(&p2p->channels, &peer->channels,
&intersection);
freqs = 0;
for (i = 0; i < intersection.reg_classes; i++) {
struct p2p_reg_class *c = &intersection.reg_class[i];
if (freqs + 1 == P2P_MAX_CHANNELS)
break;
for (j = 0; j < c->channels; j++) {
int freq;
if (freqs + 1 == P2P_MAX_CHANNELS)
break;
freq = p2p_channel_to_freq(c->reg_class, c->channel[j]);
if (freq < 0)
continue;
res.freq_list[freqs++] = freq;
}
}
res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout;
p2p_clear_timeout(p2p);
p2p->ssid_set = 0;
peer->go_neg_req_sent = 0;
peer->wps_method = WPS_NOT_READY;
p2p_set_state(p2p, P2P_PROVISIONING);
p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
}
static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa,
const u8 *data, size_t len, int rx_freq)
{
p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa));
wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len);
if (len < 1)
return;
switch (data[0]) {
case P2P_GO_NEG_REQ:
p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq);
break;
case P2P_GO_NEG_RESP:
p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq);
break;
case P2P_GO_NEG_CONF:
p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1);
break;
case P2P_INVITATION_REQ:
p2p_process_invitation_req(p2p, sa, data + 1, len - 1,
rx_freq);
break;
case P2P_INVITATION_RESP:
p2p_process_invitation_resp(p2p, sa, data + 1, len - 1);
break;
case P2P_PROV_DISC_REQ:
p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
break;
case P2P_PROV_DISC_RESP:
p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1);
break;
case P2P_DEV_DISC_REQ:
p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
break;
case P2P_DEV_DISC_RESP:
p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1);
break;
default:
p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d",
data[0]);
break;
}
}
static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da,
const u8 *sa, const u8 *bssid, const u8 *data,
size_t len, int freq)
{
if (len < 1)
return;
switch (data[0]) {
case WLAN_PA_VENDOR_SPECIFIC:
data++;
len--;
if (len < 3)
return;
if (WPA_GET_BE24(data) != OUI_WFA)
return;
data += 3;
len -= 3;
if (len < 1)
return;
if (*data != P2P_OUI_TYPE)
return;
p2p_rx_p2p_action(p2p, sa, data + 1, len - 1, freq);
break;
case WLAN_PA_GAS_INITIAL_REQ:
p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq);
break;
case WLAN_PA_GAS_INITIAL_RESP:
p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq);
break;
case WLAN_PA_GAS_COMEBACK_REQ:
p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq);
break;
case WLAN_PA_GAS_COMEBACK_RESP:
p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq);
break;
}
}
void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa,
const u8 *bssid, u8 category,
const u8 *data, size_t len, int freq)
{
if (category == WLAN_ACTION_PUBLIC) {
p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq);
return;
}
if (category != WLAN_ACTION_VENDOR_SPECIFIC)
return;
if (len < 4)
return;
if (WPA_GET_BE24(data) != OUI_WFA)
return;
data += 3;
len -= 3;
if (*data != P2P_OUI_TYPE)
return;
data++;
len--;
/* P2P action frame */
p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa));
wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len);
if (len < 1)
return;
switch (data[0]) {
case P2P_NOA:
p2p_dbg(p2p, "Received P2P Action - Notice of Absence");
/* TODO */
break;
case P2P_PRESENCE_REQ:
p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq);
break;
case P2P_PRESENCE_RESP:
p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1);
break;
case P2P_GO_DISC_REQ:
p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq);
break;
default:
p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]);
break;
}
}
static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx)
{
struct p2p_data *p2p = eloop_ctx;
if (p2p->go_neg_peer == NULL)
return;
p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
p2p->go_neg_peer->status = P2P_SC_SUCCESS;
p2p_connect_send(p2p, p2p->go_neg_peer);
}
static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx)
{
struct p2p_data *p2p = eloop_ctx;
if (p2p->invite_peer == NULL)
return;
p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr);
}
static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr,
const u8 *ie, size_t ie_len)
{
struct p2p_message msg;
struct p2p_device *dev;
os_memset(&msg, 0, sizeof(msg));
if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL)
{
p2p_parse_free(&msg);
return; /* not a P2P probe */
}
if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
!= 0) {
/* The Probe Request is not part of P2P Device Discovery. It is
* not known whether the source address of the frame is the P2P
* Device Address or P2P Interface Address. Do not add a new
* peer entry based on this frames.
*/
p2p_parse_free(&msg);
return;
}
dev = p2p_get_device(p2p, addr);
if (dev) {
if (dev->country[0] == 0 && msg.listen_channel)
os_memcpy(dev->country, msg.listen_channel, 3);
os_get_time(&dev->last_seen);
p2p_parse_free(&msg);
return; /* already known */
}
dev = p2p_create_device(p2p, addr);
if (dev == NULL) {
p2p_parse_free(&msg);
return;
}
os_get_time(&dev->last_seen);
dev->flags |= P2P_DEV_PROBE_REQ_ONLY;
if (msg.listen_channel) {
os_memcpy(dev->country, msg.listen_channel, 3);
dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3],
msg.listen_channel[4]);
}
p2p_copy_wps_info(p2p, dev, 1, &msg);
if (msg.wfd_subelems) {
wpabuf_free(dev->info.wfd_subelems);
dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
}
p2p_parse_free(&msg);
p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR
" dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d",
MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab,
dev->info.group_capab, dev->info.device_name,
dev->listen_freq);
}
struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p,
const u8 *addr,
struct p2p_message *msg)
{
struct p2p_device *dev;
dev = p2p_get_device(p2p, addr);
if (dev) {
os_get_time(&dev->last_seen);
return dev; /* already known */
}
dev = p2p_create_device(p2p, addr);
if (dev == NULL)
return NULL;
p2p_add_dev_info(p2p, addr, dev, msg);
return dev;
}
static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type)
{
if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0)
return 1;
if (os_memcmp(dev_type, req_dev_type, 2) == 0 &&
WPA_GET_BE32(&req_dev_type[2]) == 0 &&
WPA_GET_BE16(&req_dev_type[6]) == 0)
return 1; /* Category match with wildcard OUI/sub-category */
return 0;
}
int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[],
size_t num_req_dev_type)
{
size_t i;
for (i = 0; i < num_req_dev_type; i++) {
if (dev_type_match(dev_type, req_dev_type[i]))
return 1;
}
return 0;
}
/**
* p2p_match_dev_type - Match local device type with requested type
* @p2p: P2P module context from p2p_init()
* @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs)
* Returns: 1 on match, 0 on mismatch
*
* This function can be used to match the Requested Device Type attribute in
* WPS IE with the local device types for deciding whether to reply to a Probe
* Request frame.
*/
int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps)
{
struct wps_parse_attr attr;
size_t i;
if (wps_parse_msg(wps, &attr))
return 1; /* assume no Requested Device Type attributes */
if (attr.num_req_dev_type == 0)
return 1; /* no Requested Device Type attributes -> match */
if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type,
attr.num_req_dev_type))
return 1; /* Own Primary Device Type matches */
for (i = 0; i < p2p->cfg->num_sec_dev_types; i++)
if (dev_type_list_match(p2p->cfg->sec_dev_type[i],
attr.req_dev_type,
attr.num_req_dev_type))
return 1; /* Own Secondary Device Type matches */
/* No matching device type found */
return 0;
}
struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p)
{
struct wpabuf *buf;
u8 *len;
int pw_id = -1;
size_t extra = 0;
#ifdef CONFIG_WIFI_DISPLAY
if (p2p->wfd_ie_probe_resp)
extra = wpabuf_len(p2p->wfd_ie_probe_resp);
#endif /* CONFIG_WIFI_DISPLAY */
buf = wpabuf_alloc(1000 + extra);
if (buf == NULL)
return NULL;
if (p2p->go_neg_peer) {
/* Advertise immediate availability of WPS credential */
pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method);
}
p2p_build_wps_ie(p2p, buf, pw_id, 1);
#ifdef CONFIG_WIFI_DISPLAY
if (p2p->wfd_ie_probe_resp)
wpabuf_put_buf(buf, p2p->wfd_ie_probe_resp);
#endif /* CONFIG_WIFI_DISPLAY */
/* P2P IE */
len = p2p_buf_add_ie_hdr(buf);
p2p_buf_add_capability(buf, p2p->dev_capab &
~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
if (p2p->ext_listen_interval)
p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period,
p2p->ext_listen_interval);
p2p_buf_add_device_info(buf, p2p, NULL);
p2p_buf_update_ie_hdr(buf, len);
return buf;
}
static enum p2p_probe_req_status
p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
const u8 *bssid, const u8 *ie, size_t ie_len)
{
struct ieee802_11_elems elems;
struct wpabuf *buf;
struct ieee80211_mgmt *resp;
struct p2p_message msg;
struct wpabuf *ies;
if (!p2p->in_listen || !p2p->drv_in_listen) {
/* not in Listen state - ignore Probe Request */
return P2P_PREQ_NOT_LISTEN;
}
if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) ==
ParseFailed) {
/* Ignore invalid Probe Request frames */
return P2P_PREQ_MALFORMED;
}
if (elems.p2p == NULL) {
/* not a P2P probe - ignore it */
return P2P_PREQ_NOT_P2P;
}
if (dst && !is_broadcast_ether_addr(dst) &&
os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
/* Not sent to the broadcast address or our P2P Device Address
*/
return P2P_PREQ_NOT_PROCESSED;
}
if (bssid && !is_broadcast_ether_addr(bssid)) {
/* Not sent to the Wildcard BSSID */
return P2P_PREQ_NOT_PROCESSED;
}
if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN ||
os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) !=
0) {
/* not using P2P Wildcard SSID - ignore */
return P2P_PREQ_NOT_PROCESSED;
}
if (supp_rates_11b_only(&elems)) {
/* Indicates support for 11b rates only */
return P2P_PREQ_NOT_P2P;
}
os_memset(&msg, 0, sizeof(msg));
if (p2p_parse_ies(ie, ie_len, &msg) < 0) {
/* Could not parse P2P attributes */
return P2P_PREQ_NOT_P2P;
}
if (msg.device_id &&
os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
/* Device ID did not match */
p2p_parse_free(&msg);
return P2P_PREQ_NOT_PROCESSED;
}
/* Check Requested Device Type match */
if (msg.wps_attributes &&
!p2p_match_dev_type(p2p, msg.wps_attributes)) {
/* No match with Requested Device Type */
p2p_parse_free(&msg);
return P2P_PREQ_NOT_PROCESSED;
}
p2p_parse_free(&msg);
if (!p2p->cfg->send_probe_resp) {
/* Response generated elsewhere */
return P2P_PREQ_NOT_PROCESSED;
}
p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state");
/*
* We do not really have a specific BSS that this frame is advertising,
* so build a frame that has some information in valid format. This is
* really only used for discovery purposes, not to learn exact BSS
* parameters.
*/
ies = p2p_build_probe_resp_ies(p2p);
if (ies == NULL)
return P2P_PREQ_NOT_PROCESSED;
buf = wpabuf_alloc(200 + wpabuf_len(ies));
if (buf == NULL) {
wpabuf_free(ies);
return P2P_PREQ_NOT_PROCESSED;
}
resp = NULL;
resp = wpabuf_put(buf, resp->u.probe_resp.variable - (u8 *) resp);
resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) |
(WLAN_FC_STYPE_PROBE_RESP << 4));
os_memcpy(resp->da, addr, ETH_ALEN);
os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN);
os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN);
resp->u.probe_resp.beacon_int = host_to_le16(100);
/* hardware or low-level driver will setup seq_ctrl and timestamp */
resp->u.probe_resp.capab_info =
host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE |
WLAN_CAPABILITY_PRIVACY |
WLAN_CAPABILITY_SHORT_SLOT_TIME);
wpabuf_put_u8(buf, WLAN_EID_SSID);
wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN);
wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES);
wpabuf_put_u8(buf, 8);
wpabuf_put_u8(buf, (60 / 5) | 0x80);
wpabuf_put_u8(buf, 90 / 5);
wpabuf_put_u8(buf, (120 / 5) | 0x80);
wpabuf_put_u8(buf, 180 / 5);
wpabuf_put_u8(buf, (240 / 5) | 0x80);
wpabuf_put_u8(buf, 360 / 5);
wpabuf_put_u8(buf, 480 / 5);
wpabuf_put_u8(buf, 540 / 5);
wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS);
wpabuf_put_u8(buf, 1);
wpabuf_put_u8(buf, p2p->cfg->channel);
wpabuf_put_buf(buf, ies);
wpabuf_free(ies);
p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf);
wpabuf_free(buf);
return P2P_PREQ_NOT_PROCESSED;
}
enum p2p_probe_req_status
p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
const u8 *bssid, const u8 *ie, size_t ie_len)
{
enum p2p_probe_req_status res;
p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len);
res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len);
if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) &&
p2p->go_neg_peer &&
os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN)
== 0 &&
!(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
/* Received a Probe Request from GO Negotiation peer */
p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout");
eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL);
return P2P_PREQ_PROCESSED;
}
if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) &&
p2p->invite_peer &&
os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN)
== 0) {
/* Received a Probe Request from Invite peer */
p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout");
eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL);
return P2P_PREQ_PROCESSED;
}
return res;
}
static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid,
u8 *buf, size_t len, struct wpabuf *p2p_ie)
{
struct wpabuf *tmp;
u8 *lpos;
size_t tmplen;
int res;
u8 group_capab;
if (p2p_ie == NULL)
return 0; /* WLAN AP is not a P2P manager */
/*
* (Re)Association Request - P2P IE
* P2P Capability attribute (shall be present)
* P2P Interface attribute (present if concurrent device and
* P2P Management is enabled)
*/
tmp = wpabuf_alloc(200);
if (tmp == NULL)
return -1;
lpos = p2p_buf_add_ie_hdr(tmp);
group_capab = 0;
if (p2p->num_groups > 0) {
group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER;
if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
(p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) &&
p2p->cross_connect)
group_capab |= P2P_GROUP_CAPAB_CROSS_CONN;
}
p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab);
if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
(p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED))
p2p_buf_add_p2p_interface(tmp, p2p);
p2p_buf_update_ie_hdr(tmp, lpos);
tmplen = wpabuf_len(tmp);
if (tmplen > len)
res = -1;
else {
os_memcpy(buf, wpabuf_head(tmp), tmplen);
res = tmplen;
}
wpabuf_free(tmp);
return res;
}
int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf,
size_t len, int p2p_group, struct wpabuf *p2p_ie)
{
struct wpabuf *tmp;
u8 *lpos;
struct p2p_device *peer;
size_t tmplen;
int res;
size_t extra = 0;
if (!p2p_group)
return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie);
#ifdef CONFIG_WIFI_DISPLAY
if (p2p->wfd_ie_assoc_req)
extra = wpabuf_len(p2p->wfd_ie_assoc_req);
#endif /* CONFIG_WIFI_DISPLAY */
/*
* (Re)Association Request - P2P IE
* P2P Capability attribute (shall be present)
* Extended Listen Timing (may be present)
* P2P Device Info attribute (shall be present)
*/
tmp = wpabuf_alloc(200 + extra);
if (tmp == NULL)
return -1;
#ifdef CONFIG_WIFI_DISPLAY
if (p2p->wfd_ie_assoc_req)
wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req);
#endif /* CONFIG_WIFI_DISPLAY */
peer = bssid ? p2p_get_device(p2p, bssid) : NULL;
lpos = p2p_buf_add_ie_hdr(tmp);
p2p_buf_add_capability(tmp, p2p->dev_capab, 0);
if (p2p->ext_listen_interval)
p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period,
p2p->ext_listen_interval);
p2p_buf_add_device_info(tmp, p2p, peer);
p2p_buf_update_ie_hdr(tmp, lpos);
tmplen = wpabuf_len(tmp);
if (tmplen > len)
res = -1;
else {
os_memcpy(buf, wpabuf_head(tmp), tmplen);
res = tmplen;
}
wpabuf_free(tmp);
return res;
}
int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end)
{
struct wpabuf *p2p_ie;
int ret;
p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE);
if (p2p_ie == NULL)
return 0;
ret = p2p_attr_text(p2p_ie, buf, end);
wpabuf_free(p2p_ie);
return ret;
}
int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr)
{
struct p2p_message msg;
os_memset(&msg, 0, sizeof(msg));
if (p2p_parse_p2p_ie(p2p_ie, &msg))
return -1;
if (msg.p2p_device_addr) {
os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN);
return 0;
} else if (msg.device_id) {
os_memcpy(dev_addr, msg.device_id, ETH_ALEN);
return 0;
}
return -1;
}
int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr)
{
struct wpabuf *p2p_ie;
int ret;
p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
P2P_IE_VENDOR_TYPE);
if (p2p_ie == NULL)
return -1;
ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr);
wpabuf_free(p2p_ie);
return ret;
}
static void p2p_clear_go_neg(struct p2p_data *p2p)
{
p2p->go_neg_peer = NULL;
p2p_clear_timeout(p2p);
p2p_set_state(p2p, P2P_IDLE);
}
void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr)
{
if (p2p->go_neg_peer == NULL) {
p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification");
return; /* No pending Group Formation */
}
if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) !=
0) {
p2p_dbg(p2p, "Ignore WPS registration success notification for "
MACSTR " (GO Negotiation peer " MACSTR ")",
MAC2STR(mac_addr),
MAC2STR(p2p->go_neg_peer->intended_addr));
return; /* Ignore unexpected peer address */
}
p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR,
MAC2STR(mac_addr));
p2p_clear_go_neg(p2p);
}
void p2p_group_formation_failed(struct p2p_data *p2p)
{
if (p2p->go_neg_peer == NULL) {
p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification");
return; /* No pending Group Formation */
}
p2p_dbg(p2p, "Group Formation failed with " MACSTR,
MAC2STR(p2p->go_neg_peer->intended_addr));
p2p_clear_go_neg(p2p);
}
struct p2p_data * p2p_init(const struct p2p_config *cfg)
{
struct p2p_data *p2p;
if (cfg->max_peers < 1)
return NULL;
p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg));
if (p2p == NULL)
return NULL;
p2p->cfg = (struct p2p_config *) (p2p + 1);
os_memcpy(p2p->cfg, cfg, sizeof(*cfg));
if (cfg->dev_name)
p2p->cfg->dev_name = os_strdup(cfg->dev_name);
if (cfg->manufacturer)
p2p->cfg->manufacturer = os_strdup(cfg->manufacturer);
if (cfg->model_name)
p2p->cfg->model_name = os_strdup(cfg->model_name);
if (cfg->model_number)
p2p->cfg->model_number = os_strdup(cfg->model_number);
if (cfg->serial_number)
p2p->cfg->serial_number = os_strdup(cfg->serial_number);
if (cfg->pref_chan) {
p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan *
sizeof(struct p2p_channel));
if (p2p->cfg->pref_chan) {
os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan,
cfg->num_pref_chan *
sizeof(struct p2p_channel));
} else
p2p->cfg->num_pref_chan = 0;
}
p2p->min_disc_int = 1;
p2p->max_disc_int = 3;
p2p->max_disc_tu = -1;
os_get_random(&p2p->next_tie_breaker, 1);
p2p->next_tie_breaker &= 0x01;
if (cfg->sd_request)
p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY;
p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE;
if (cfg->concurrent_operations)
p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER;
p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
dl_list_init(&p2p->devices);
eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0,
p2p_expiration_timeout, p2p, NULL);
p2p->go_timeout = 100;
p2p->client_timeout = 20;
return p2p;
}
void p2p_deinit(struct p2p_data *p2p)
{
#ifdef CONFIG_WIFI_DISPLAY
wpabuf_free(p2p->wfd_ie_beacon);
wpabuf_free(p2p->wfd_ie_probe_req);
wpabuf_free(p2p->wfd_ie_probe_resp);
wpabuf_free(p2p->wfd_ie_assoc_req);
wpabuf_free(p2p->wfd_ie_invitation);
wpabuf_free(p2p->wfd_ie_prov_disc_req);
wpabuf_free(p2p->wfd_ie_prov_disc_resp);
wpabuf_free(p2p->wfd_ie_go_neg);
wpabuf_free(p2p->wfd_dev_info);
wpabuf_free(p2p->wfd_assoc_bssid);
wpabuf_free(p2p->wfd_coupled_sink_info);
#endif /* CONFIG_WIFI_DISPLAY */
eloop_cancel_timeout(p2p_expiration_timeout, p2p, NULL);
eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
p2p_flush(p2p);
p2p_free_req_dev_types(p2p);
os_free(p2p->cfg->dev_name);
os_free(p2p->cfg->manufacturer);
os_free(p2p->cfg->model_name);
os_free(p2p->cfg->model_number);
os_free(p2p->cfg->serial_number);
os_free(p2p->cfg->pref_chan);
os_free(p2p->groups);
wpabuf_free(p2p->sd_resp);
os_free(p2p->after_scan_tx);
p2p_remove_wps_vendor_extensions(p2p);
os_free(p2p);
}
void p2p_flush(struct p2p_data *p2p)
{
struct p2p_device *dev, *prev;
p2p_stop_find(p2p);
dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device,
list) {
dl_list_del(&dev->list);
p2p_device_free(p2p, dev);
}
p2p_free_sd_queries(p2p);
os_free(p2p->after_scan_tx);
p2p->after_scan_tx = NULL;
}
int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr)
{
struct p2p_device *dev;
dev = p2p_get_device(p2p, addr);
if (dev == NULL)
return -1;
p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr));
if (p2p->go_neg_peer == dev)
p2p->go_neg_peer = NULL;
dev->wps_method = WPS_NOT_READY;
dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
/* Check if after_scan_tx is for this peer. If so free it */
if (p2p->after_scan_tx &&
os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) {
os_free(p2p->after_scan_tx);
p2p->after_scan_tx = NULL;
}
return 0;
}
int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name)
{
os_free(p2p->cfg->dev_name);
if (dev_name) {
p2p->cfg->dev_name = os_strdup(dev_name);
if (p2p->cfg->dev_name == NULL)
return -1;
} else
p2p->cfg->dev_name = NULL;
return 0;
}
int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer)
{
os_free(p2p->cfg->manufacturer);
p2p->cfg->manufacturer = NULL;
if (manufacturer) {
p2p->cfg->manufacturer = os_strdup(manufacturer);
if (p2p->cfg->manufacturer == NULL)
return -1;
}
return 0;
}
int p2p_set_model_name(struct p2p_data *p2p, const char *model_name)
{
os_free(p2p->cfg->model_name);
p2p->cfg->model_name = NULL;
if (model_name) {
p2p->cfg->model_name = os_strdup(model_name);
if (p2p->cfg->model_name == NULL)
return -1;
}
return 0;
}
int p2p_set_model_number(struct p2p_data *p2p, const char *model_number)
{
os_free(p2p->cfg->model_number);
p2p->cfg->model_number = NULL;
if (model_number) {
p2p->cfg->model_number = os_strdup(model_number);
if (p2p->cfg->model_number == NULL)
return -1;
}
return 0;
}
int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number)
{
os_free(p2p->cfg->serial_number);
p2p->cfg->serial_number = NULL;
if (serial_number) {
p2p->cfg->serial_number = os_strdup(serial_number);
if (p2p->cfg->serial_number == NULL)
return -1;
}
return 0;
}
void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods)
{
p2p->cfg->config_methods = config_methods;
}
void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid)
{
os_memcpy(p2p->cfg->uuid, uuid, 16);
}
int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type)
{
os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8);
return 0;
}
int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8],
size_t num_dev_types)
{
if (num_dev_types > P2P_SEC_DEVICE_TYPES)
num_dev_types = P2P_SEC_DEVICE_TYPES;
p2p->cfg->num_sec_dev_types = num_dev_types;
os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8);
return 0;
}
void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p)
{
int i;
for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
wpabuf_free(p2p->wps_vendor_ext[i]);
p2p->wps_vendor_ext[i] = NULL;
}
}
int p2p_add_wps_vendor_extension(struct p2p_data *p2p,
const struct wpabuf *vendor_ext)
{
int i;
if (vendor_ext == NULL)
return -1;
for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
if (p2p->wps_vendor_ext[i] == NULL)
break;
}
if (i >= P2P_MAX_WPS_VENDOR_EXT)
return -1;
p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext);
if (p2p->wps_vendor_ext[i] == NULL)
return -1;
return 0;
}
int p2p_set_country(struct p2p_data *p2p, const char *country)
{
os_memcpy(p2p->cfg->country, country, 3);
return 0;
}
void p2p_continue_find(struct p2p_data *p2p)
{
struct p2p_device *dev;
p2p_set_state(p2p, P2P_SEARCH);
dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
if (dev->flags & P2P_DEV_SD_SCHEDULE) {
if (p2p_start_sd(p2p, dev) == 0)
return;
else
break;
} else if (dev->req_config_methods &&
!(dev->flags & P2P_DEV_PD_FOR_JOIN)) {
p2p_dbg(p2p, "Send pending Provision Discovery Request to "
MACSTR " (config methods 0x%x)",
MAC2STR(dev->info.p2p_device_addr),
dev->req_config_methods);
if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0)
return;
}
}
p2p_listen_in_find(p2p, 1);
}
static void p2p_sd_cb(struct p2p_data *p2p, int success)
{
p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d",
success);
p2p->pending_action_state = P2P_NO_PENDING_ACTION;
if (!success) {
if (p2p->sd_peer) {
p2p->sd_peer->flags &= ~P2P_DEV_SD_SCHEDULE;
p2p->sd_peer = NULL;
}
p2p_continue_find(p2p);
return;
}
if (p2p->sd_peer == NULL) {
p2p_dbg(p2p, "No SD peer entry known");
p2p_continue_find(p2p);
return;
}
/* Wait for response from the peer */
p2p_set_state(p2p, P2P_SD_DURING_FIND);
p2p_set_timeout(p2p, 0, 200000);
}
/**
* p2p_retry_pd - Retry any pending provision disc requests in IDLE state
* @p2p: P2P module context from p2p_init()
*/
static void p2p_retry_pd(struct p2p_data *p2p)
{
struct p2p_device *dev;
if (p2p->state != P2P_IDLE)
return;
/*
* Retry the prov disc req attempt only for the peer that the user had
* requested.
*/
dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
if (os_memcmp(p2p->pending_pd_devaddr,
dev->info.p2p_device_addr, ETH_ALEN) != 0)
continue;
if (!dev->req_config_methods)
continue;
p2p_dbg(p2p, "Send pending Provision Discovery Request to "
MACSTR " (config methods 0x%x)",
MAC2STR(dev->info.p2p_device_addr),
dev->req_config_methods);
p2p_send_prov_disc_req(p2p, dev,
dev->flags & P2P_DEV_PD_FOR_JOIN, 0);
return;
}
}
static void p2p_prov_disc_cb(struct p2p_data *p2p, int success)
{
p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d",
success);
/*
* Postpone resetting the pending action state till after we actually
* time out. This allows us to take some action like notifying any
* interested parties about no response to the request.
*
* When the timer (below) goes off we check in IDLE, SEARCH, or
* LISTEN_ONLY state, which are the only allowed states to issue a PD
* requests in, if this was still pending and then raise notification.
*/
if (!success) {
p2p->pending_action_state = P2P_NO_PENDING_ACTION;
if (p2p->user_initiated_pd &&
(p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY))
{
/* Retry request from timeout to avoid busy loops */
p2p->pending_action_state = P2P_PENDING_PD;
p2p_set_timeout(p2p, 0, 50000);
} else if (p2p->state != P2P_IDLE)
p2p_continue_find(p2p);
else if (p2p->user_initiated_pd) {
p2p->pending_action_state = P2P_PENDING_PD;
p2p_set_timeout(p2p, 0, 300000);
}
return;
}
/*
* This postponing, of resetting pending_action_state, needs to be
* done only for user initiated PD requests and not internal ones.
*/
if (p2p->user_initiated_pd)
p2p->pending_action_state = P2P_PENDING_PD;
else
p2p->pending_action_state = P2P_NO_PENDING_ACTION;
/* Wait for response from the peer */
if (p2p->state == P2P_SEARCH)
p2p_set_state(p2p, P2P_PD_DURING_FIND);
p2p_set_timeout(p2p, 0, 200000);
}
int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq,
struct os_time *rx_time, int level, const u8 *ies,
size_t ies_len)
{
if (os_time_before(rx_time, &p2p->find_start)) {
/*
* The driver may have cached (e.g., in cfg80211 BSS table) the
* scan results for relatively long time. To avoid reporting
* stale information, update P2P peers only based on results
* that have based on frames received after the last p2p_find
* operation was started.
*/
p2p_dbg(p2p, "Ignore old scan result for " MACSTR
" (rx_time=%u.%06u)",
MAC2STR(bssid), (unsigned int) rx_time->sec,
(unsigned int) rx_time->usec);
return 0;
}
p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1);
return 0;
}
void p2p_scan_res_handled(struct p2p_data *p2p)
{
if (!p2p->p2p_scan_running) {
p2p_dbg(p2p, "p2p_scan was not running, but scan results received");
}
p2p->p2p_scan_running = 0;
eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
if (p2p_run_after_scan(p2p))
return;
if (p2p->state == P2P_SEARCH)
p2p_continue_find(p2p);
}
void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id)
{
u8 *len;
#ifdef CONFIG_WIFI_DISPLAY
if (p2p->wfd_ie_probe_req)
wpabuf_put_buf(ies, p2p->wfd_ie_probe_req);
#endif /* CONFIG_WIFI_DISPLAY */
len = p2p_buf_add_ie_hdr(ies);
p2p_buf_add_capability(ies, p2p->dev_capab &
~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
if (dev_id)
p2p_buf_add_device_id(ies, dev_id);
if (p2p->cfg->reg_class && p2p->cfg->channel)
p2p_buf_add_listen_channel(ies, p2p->cfg->country,
p2p->cfg->reg_class,
p2p->cfg->channel);
if (p2p->ext_listen_interval)
p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period,
p2p->ext_listen_interval);
/* TODO: p2p_buf_add_operating_channel() if GO */
p2p_buf_update_ie_hdr(ies, len);
}
size_t p2p_scan_ie_buf_len(struct p2p_data *p2p)
{
size_t len = 100;
#ifdef CONFIG_WIFI_DISPLAY
if (p2p && p2p->wfd_ie_probe_req)
len += wpabuf_len(p2p->wfd_ie_probe_req);
#endif /* CONFIG_WIFI_DISPLAY */
return len;
}
int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end)
{
return p2p_attr_text(p2p_ie, buf, end);
}
static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success)
{
struct p2p_device *dev = p2p->go_neg_peer;
int timeout;
p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success);
if (dev == NULL) {
p2p_dbg(p2p, "No pending GO Negotiation");
return;
}
if (success) {
if (dev->flags & P2P_DEV_USER_REJECTED) {
p2p_set_state(p2p, P2P_IDLE);
return;
}
} else if (dev->go_neg_req_sent) {
/* Cancel the increment from p2p_connect_send() on failure */
dev->go_neg_req_sent--;
}
if (!success &&
(dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) &&
!is_zero_ether_addr(dev->member_in_go_dev)) {
p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO",
MAC2STR(dev->info.p2p_device_addr));
p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
p2p_send_dev_disc_req(p2p, dev);
return;
}
/*
* Use P2P find, if needed, to find the other device from its listen
* channel.
*/
p2p_set_state(p2p, P2P_CONNECT);
timeout = success ? 500000 : 100000;
if (!success && p2p->go_neg_peer &&
(p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) {
unsigned int r;
/*
* Peer is expected to wait our response and we will skip the
* listen phase. Add some randomness to the wait time here to
* make it less likely to hit cases where we could end up in
* sync with peer not listening.
*/
os_get_random((u8 *) &r, sizeof(r));
timeout += r % 100000;
}
p2p_set_timeout(p2p, 0, timeout);
}
static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success)
{
p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d",
success);
if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) {
p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore");
return;
}
p2p_set_state(p2p, P2P_CONNECT);
p2p_set_timeout(p2p, 0, 500000);
}
static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success,
const u8 *addr)
{
p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success);
if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) {
p2p_go_neg_failed(p2p, p2p->go_neg_peer,
p2p->go_neg_peer->status);
} else if (success) {
struct p2p_device *dev;
dev = p2p_get_device(p2p, addr);
if (dev &&
dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE)
dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE;
}
}
static void p2p_go_neg_conf_cb(struct p2p_data *p2p,
enum p2p_send_action_result result)
{
struct p2p_device *dev;
p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result);
p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
if (result == P2P_SEND_ACTION_FAILED) {
p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
return;
}
if (result == P2P_SEND_ACTION_NO_ACK) {
/*
* It looks like the TX status for GO Negotiation Confirm is
* often showing failure even when the peer has actually
* received the frame. Since the peer may change channels
* immediately after having received the frame, we may not see
* an Ack for retries, so just dropping a single frame may
* trigger this. To allow the group formation to succeed if the
* peer did indeed receive the frame, continue regardless of
* the TX status.
*/
p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported");
}
dev = p2p->go_neg_peer;
if (dev == NULL)
return;
p2p_go_complete(p2p, dev);
}
void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
const u8 *src, const u8 *bssid,
enum p2p_send_action_result result)
{
enum p2p_pending_action_state state;
int success;
p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR
" src=" MACSTR " bssid=" MACSTR " result=%d",
p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src),
MAC2STR(bssid), result);
success = result == P2P_SEND_ACTION_SUCCESS;
state = p2p->pending_action_state;
p2p->pending_action_state = P2P_NO_PENDING_ACTION;
switch (state) {
case P2P_NO_PENDING_ACTION:
if (p2p->after_scan_tx_in_progress) {
p2p->after_scan_tx_in_progress = 0;
if (p2p->start_after_scan != P2P_AFTER_SCAN_NOTHING &&
p2p_run_after_scan(p2p))
break;
if (p2p->state == P2P_SEARCH) {
p2p_dbg(p2p, "Continue find after after_scan_tx completion");
p2p_continue_find(p2p);
}
}
break;
case P2P_PENDING_GO_NEG_REQUEST:
p2p_go_neg_req_cb(p2p, success);
break;
case P2P_PENDING_GO_NEG_RESPONSE:
p2p_go_neg_resp_cb(p2p, success);
break;
case P2P_PENDING_GO_NEG_RESPONSE_FAILURE:
p2p_go_neg_resp_failure_cb(p2p, success, dst);
break;
case P2P_PENDING_GO_NEG_CONFIRM:
p2p_go_neg_conf_cb(p2p, result);
break;
case P2P_PENDING_SD:
p2p_sd_cb(p2p, success);
break;
case P2P_PENDING_PD:
p2p_prov_disc_cb(p2p, success);
break;
case P2P_PENDING_INVITATION_REQUEST:
p2p_invitation_req_cb(p2p, success);
break;
case P2P_PENDING_INVITATION_RESPONSE:
p2p_invitation_resp_cb(p2p, success);
break;
case P2P_PENDING_DEV_DISC_REQUEST:
p2p_dev_disc_req_cb(p2p, success);
break;
case P2P_PENDING_DEV_DISC_RESPONSE:
p2p_dev_disc_resp_cb(p2p, success);
break;
case P2P_PENDING_GO_DISC_REQ:
p2p_go_disc_req_cb(p2p, success);
break;
}
p2p->after_scan_tx_in_progress = 0;
}
void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq,
unsigned int duration)
{
if (freq == p2p->pending_client_disc_freq) {
p2p_dbg(p2p, "Client discoverability remain-awake completed");
p2p->pending_client_disc_freq = 0;
return;
}
if (freq != p2p->pending_listen_freq) {
p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)",
freq, duration, p2p->pending_listen_freq);
return;
}
p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback",
p2p->pending_listen_sec, p2p->pending_listen_usec,
p2p->pending_listen_freq);
p2p->in_listen = 1;
p2p->drv_in_listen = freq;
if (p2p->pending_listen_sec || p2p->pending_listen_usec) {
/*
* Add 20 msec extra wait to avoid race condition with driver
* remain-on-channel end event, i.e., give driver more time to
* complete the operation before our timeout expires.
*/
p2p_set_timeout(p2p, p2p->pending_listen_sec,
p2p->pending_listen_usec + 20000);
}
p2p->pending_listen_freq = 0;
}
int p2p_listen_end(struct p2p_data *p2p, unsigned int freq)
{
p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq);
p2p->drv_in_listen = 0;
if (p2p->in_listen)
return 0; /* Internal timeout will trigger the next step */
if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) {
if (p2p->go_neg_peer->connect_reqs >= 120) {
p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
return 0;
}
p2p_set_state(p2p, P2P_CONNECT);
p2p_connect_send(p2p, p2p->go_neg_peer);
return 1;
} else if (p2p->state == P2P_SEARCH) {
if (p2p->p2p_scan_running) {
/*
* Search is already in progress. This can happen if
* an Action frame RX is reported immediately after
* the end of a remain-on-channel operation and the
* response frame to that is sent using an offchannel
* operation while in p2p_find. Avoid an attempt to
* restart a scan here.
*/
p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one");
return 1;
}
if (p2p->pending_listen_freq) {
/*
* Better wait a bit if the driver is unable to start
* offchannel operation for some reason. p2p_search()
* will be started from internal timeout.
*/
p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop");
p2p_set_timeout(p2p, 0, 100000);
return 1;
}
if (p2p->search_delay) {
p2p_dbg(p2p, "Delay search operation by %u ms",
p2p->search_delay);
p2p_set_timeout(p2p, p2p->search_delay / 1000,
(p2p->search_delay % 1000) * 1000);
return 1;
}
p2p_search(p2p);
return 1;
}
return 0;
}
static void p2p_timeout_connect(struct p2p_data *p2p)
{
p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
if (p2p->go_neg_peer &&
(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed");
p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
return;
}
if (p2p->go_neg_peer &&
(p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) &&
p2p->go_neg_peer->connect_reqs < 120) {
p2p_dbg(p2p, "Peer expected to wait our response - skip listen");
p2p_connect_send(p2p, p2p->go_neg_peer);
return;
}
p2p_set_state(p2p, P2P_CONNECT_LISTEN);
p2p_listen_in_find(p2p, 0);
}
static void p2p_timeout_connect_listen(struct p2p_data *p2p)
{
if (p2p->go_neg_peer) {
if (p2p->drv_in_listen) {
p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete");
return;
}
if (p2p->go_neg_peer->connect_reqs >= 120) {
p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
p2p_go_neg_failed(p2p, p2p->go_neg_peer, -1);
return;
}
p2p_set_state(p2p, P2P_CONNECT);
p2p_connect_send(p2p, p2p->go_neg_peer);
} else
p2p_set_state(p2p, P2P_IDLE);
}
static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p)
{
/*
* TODO: could remain constantly in Listen state for some time if there
* are no other concurrent uses for the radio. For now, go to listen
* state once per second to give other uses a chance to use the radio.
*/
p2p_set_state(p2p, P2P_WAIT_PEER_IDLE);
p2p_set_timeout(p2p, 0, 500000);
}
static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p)
{
struct p2p_device *dev = p2p->go_neg_peer;
if (dev == NULL) {
p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait");
return;
}
dev->wait_count++;
if (dev->wait_count >= 120) {
p2p_dbg(p2p, "Timeout on waiting peer to become ready for GO Negotiation");
p2p_go_neg_failed(p2p, dev, -1);
return;
}
p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation");
p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT);
p2p_listen_in_find(p2p, 0);
}
static void p2p_timeout_sd_during_find(struct p2p_data *p2p)
{
p2p_dbg(p2p, "Service Discovery Query timeout");
if (p2p->sd_peer) {
p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
p2p->sd_peer->flags &= ~P2P_DEV_SD_SCHEDULE;
p2p->sd_peer = NULL;
}
p2p_continue_find(p2p);
}
static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p)
{
p2p_dbg(p2p, "Provision Discovery Request timeout");
p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
p2p_continue_find(p2p);
}
static void p2p_timeout_prov_disc_req(struct p2p_data *p2p)
{
p2p->pending_action_state = P2P_NO_PENDING_ACTION;
/*
* For user initiated PD requests that we have not gotten any responses
* for while in IDLE state, we retry them a couple of times before
* giving up.
*/
if (!p2p->user_initiated_pd)
return;
p2p_dbg(p2p, "User initiated Provision Discovery Request timeout");
if (p2p->pd_retries) {
p2p->pd_retries--;
p2p_retry_pd(p2p);
} else {
struct p2p_device *dev;
int for_join = 0;
dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
if (os_memcmp(p2p->pending_pd_devaddr,
dev->info.p2p_device_addr, ETH_ALEN) != 0)
continue;
if (dev->req_config_methods &&
(dev->flags & P2P_DEV_PD_FOR_JOIN))
for_join = 1;
}
if (p2p->cfg->prov_disc_fail)
p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx,
p2p->pending_pd_devaddr,
for_join ?
P2P_PROV_DISC_TIMEOUT_JOIN :
P2P_PROV_DISC_TIMEOUT);
p2p_reset_pending_pd(p2p);
}
}
static void p2p_timeout_invite(struct p2p_data *p2p)
{
p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
p2p_set_state(p2p, P2P_INVITE_LISTEN);
if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) {
/*
* Better remain on operating channel instead of listen channel
* when running a group.
*/
p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel");
p2p_set_timeout(p2p, 0, 100000);
return;
}
p2p_listen_in_find(p2p, 0);
}
static void p2p_timeout_invite_listen(struct p2p_data *p2p)
{
if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) {
p2p_set_state(p2p, P2P_INVITE);
p2p_invite_send(p2p, p2p->invite_peer,
p2p->invite_go_dev_addr);
} else {
if (p2p->invite_peer) {
p2p_dbg(p2p, "Invitation Request retry limit reached");
if (p2p->cfg->invitation_result)
p2p->cfg->invitation_result(
p2p->cfg->cb_ctx, -1, NULL, NULL,
p2p->invite_peer->info.p2p_device_addr);
}
p2p_set_state(p2p, P2P_IDLE);
}
}
static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx)
{
struct p2p_data *p2p = eloop_ctx;
p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state));
p2p->in_listen = 0;
switch (p2p->state) {
case P2P_IDLE:
/* Check if we timed out waiting for PD req */
if (p2p->pending_action_state == P2P_PENDING_PD)
p2p_timeout_prov_disc_req(p2p);
break;
case P2P_SEARCH:
/* Check if we timed out waiting for PD req */
if (p2p->pending_action_state == P2P_PENDING_PD)
p2p_timeout_prov_disc_req(p2p);
if (p2p->search_delay && !p2p->in_search_delay) {
p2p_dbg(p2p, "Delay search operation by %u ms",
p2p->search_delay);
p2p->in_search_delay = 1;
p2p_set_timeout(p2p, p2p->search_delay / 1000,
(p2p->search_delay % 1000) * 1000);
break;
}
p2p->in_search_delay = 0;
p2p_search(p2p);
break;
case P2P_CONNECT:
p2p_timeout_connect(p2p);
break;
case P2P_CONNECT_LISTEN:
p2p_timeout_connect_listen(p2p);
break;
case P2P_GO_NEG:
break;
case P2P_LISTEN_ONLY:
/* Check if we timed out waiting for PD req */
if (p2p->pending_action_state == P2P_PENDING_PD)
p2p_timeout_prov_disc_req(p2p);
if (p2p->ext_listen_only) {
p2p_dbg(p2p, "Extended Listen Timing - Listen State completed");
p2p->ext_listen_only = 0;
p2p_set_state(p2p, P2P_IDLE);
}
break;
case P2P_WAIT_PEER_CONNECT:
p2p_timeout_wait_peer_connect(p2p);
break;
case P2P_WAIT_PEER_IDLE:
p2p_timeout_wait_peer_idle(p2p);
break;
case P2P_SD_DURING_FIND:
p2p_timeout_sd_during_find(p2p);
break;
case P2P_PROVISIONING:
break;
case P2P_PD_DURING_FIND:
p2p_timeout_prov_disc_during_find(p2p);
break;
case P2P_INVITE:
p2p_timeout_invite(p2p);
break;
case P2P_INVITE_LISTEN:
p2p_timeout_invite_listen(p2p);
break;
case P2P_SEARCH_WHEN_READY:
break;
case P2P_CONTINUE_SEARCH_WHEN_READY:
break;
}
}
int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr)
{
struct p2p_device *dev;
dev = p2p_get_device(p2p, peer_addr);
p2p_dbg(p2p, "Local request to reject connection attempts by peer "
MACSTR, MAC2STR(peer_addr));
if (dev == NULL) {
p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr));
return -1;
}
dev->status = P2P_SC_FAIL_REJECTED_BY_USER;
dev->flags |= P2P_DEV_USER_REJECTED;
return 0;
}
const char * p2p_wps_method_text(enum p2p_wps_method method)
{
switch (method) {
case WPS_NOT_READY:
return "not-ready";
case WPS_PIN_DISPLAY:
return "Display";
case WPS_PIN_KEYPAD:
return "Keypad";
case WPS_PBC:
return "PBC";
}
return "??";
}
static const char * p2p_go_state_text(enum p2p_go_state go_state)
{
switch (go_state) {
case UNKNOWN_GO:
return "unknown";
case LOCAL_GO:
return "local";
case REMOTE_GO:
return "remote";
}
return "??";
}
const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p,
const u8 *addr, int next)
{
struct p2p_device *dev;
if (addr)
dev = p2p_get_device(p2p, addr);
else
dev = dl_list_first(&p2p->devices, struct p2p_device, list);
if (dev && next) {
dev = dl_list_first(&dev->list, struct p2p_device, list);
if (&dev->list == &p2p->devices)
dev = NULL;
}
if (dev == NULL)
return NULL;
return &dev->info;
}
int p2p_get_peer_info_txt(const struct p2p_peer_info *info,
char *buf, size_t buflen)
{
struct p2p_device *dev;
int res;
char *pos, *end;
struct os_time now;
if (info == NULL)
return -1;
dev = (struct p2p_device *) (((u8 *) info) -
offsetof(struct p2p_device, info));
pos = buf;
end = buf + buflen;
os_get_time(&now);
res = os_snprintf(pos, end - pos,
"age=%d\n"
"listen_freq=%d\n"
"wps_method=%s\n"
"interface_addr=" MACSTR "\n"
"member_in_go_dev=" MACSTR "\n"
"member_in_go_iface=" MACSTR "\n"
"go_neg_req_sent=%d\n"
"go_state=%s\n"
"dialog_token=%u\n"
"intended_addr=" MACSTR "\n"
"country=%c%c\n"
"oper_freq=%d\n"
"req_config_methods=0x%x\n"
"flags=%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n"
"status=%d\n"
"wait_count=%u\n"
"invitation_reqs=%u\n",
(int) (now.sec - dev->last_seen.sec),
dev->listen_freq,
p2p_wps_method_text(dev->wps_method),
MAC2STR(dev->interface_addr),
MAC2STR(dev->member_in_go_dev),
MAC2STR(dev->member_in_go_iface),
dev->go_neg_req_sent,
p2p_go_state_text(dev->go_state),
dev->dialog_token,
MAC2STR(dev->intended_addr),
dev->country[0] ? dev->country[0] : '_',
dev->country[1] ? dev->country[1] : '_',
dev->oper_freq,
dev->req_config_methods,
dev->flags & P2P_DEV_PROBE_REQ_ONLY ?
"[PROBE_REQ_ONLY]" : "",
dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "",
dev->flags & P2P_DEV_NOT_YET_READY ?
"[NOT_YET_READY]" : "",
dev->flags & P2P_DEV_SD_INFO ? "[SD_INFO]" : "",
dev->flags & P2P_DEV_SD_SCHEDULE ? "[SD_SCHEDULE]" :
"",
dev->flags & P2P_DEV_PD_PEER_DISPLAY ?
"[PD_PEER_DISPLAY]" : "",
dev->flags & P2P_DEV_PD_PEER_KEYPAD ?
"[PD_PEER_KEYPAD]" : "",
dev->flags & P2P_DEV_USER_REJECTED ?
"[USER_REJECTED]" : "",
dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ?
"[PEER_WAITING_RESPONSE]" : "",
dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ?
"[PREFER_PERSISTENT_GROUP]" : "",
dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ?
"[WAIT_GO_NEG_RESPONSE]" : "",
dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ?
"[WAIT_GO_NEG_CONFIRM]" : "",
dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ?
"[GROUP_CLIENT_ONLY]" : "",
dev->flags & P2P_DEV_FORCE_FREQ ?
"[FORCE_FREQ]" : "",
dev->flags & P2P_DEV_PD_FOR_JOIN ?
"[PD_FOR_JOIN]" : "",
dev->status,
dev->wait_count,
dev->invitation_reqs);
if (res < 0 || res >= end - pos)
return pos - buf;
pos += res;
if (dev->ext_listen_period) {
res = os_snprintf(pos, end - pos,
"ext_listen_period=%u\n"
"ext_listen_interval=%u\n",
dev->ext_listen_period,
dev->ext_listen_interval);
if (res < 0 || res >= end - pos)
return pos - buf;
pos += res;
}
if (dev->oper_ssid_len) {
res = os_snprintf(pos, end - pos,
"oper_ssid=%s\n",
wpa_ssid_txt(dev->oper_ssid,
dev->oper_ssid_len));
if (res < 0 || res >= end - pos)
return pos - buf;
pos += res;
}
#ifdef CONFIG_WIFI_DISPLAY
if (dev->info.wfd_subelems) {
res = os_snprintf(pos, end - pos, "wfd_subelems=");
if (res < 0 || res >= end - pos)
return pos - buf;
pos += res;
pos += wpa_snprintf_hex(pos, end - pos,
wpabuf_head(dev->info.wfd_subelems),
wpabuf_len(dev->info.wfd_subelems));
res = os_snprintf(pos, end - pos, "\n");
if (res < 0 || res >= end - pos)
return pos - buf;
pos += res;
}
#endif /* CONFIG_WIFI_DISPLAY */
return pos - buf;
}
int p2p_peer_known(struct p2p_data *p2p, const u8 *addr)
{
return p2p_get_device(p2p, addr) != NULL;
}
void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled)
{
if (enabled) {
p2p_dbg(p2p, "Client discoverability enabled");
p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
} else {
p2p_dbg(p2p, "Client discoverability disabled");
p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
}
}
static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1,
u32 duration2, u32 interval2)
{
struct wpabuf *req;
struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL;
u8 *len;
req = wpabuf_alloc(100);
if (req == NULL)
return NULL;
if (duration1 || interval1) {
os_memset(&desc1, 0, sizeof(desc1));
desc1.count_type = 1;
desc1.duration = duration1;
desc1.interval = interval1;
ptr1 = &desc1;
if (duration2 || interval2) {
os_memset(&desc2, 0, sizeof(desc2));
desc2.count_type = 2;
desc2.duration = duration2;
desc2.interval = interval2;
ptr2 = &desc2;
}
}
p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1);
len = p2p_buf_add_ie_hdr(req);
p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2);
p2p_buf_update_ie_hdr(req, len);
return req;
}
int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr,
const u8 *own_interface_addr, unsigned int freq,
u32 duration1, u32 interval1, u32 duration2,
u32 interval2)
{
struct wpabuf *req;
p2p_dbg(p2p, "Send Presence Request to GO " MACSTR
" (own interface " MACSTR ") freq=%u dur1=%u int1=%u "
"dur2=%u int2=%u",
MAC2STR(go_interface_addr), MAC2STR(own_interface_addr),
freq, duration1, interval1, duration2, interval2);
req = p2p_build_presence_req(duration1, interval1, duration2,
interval2);
if (req == NULL)
return -1;
p2p->pending_action_state = P2P_NO_PENDING_ACTION;
if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr,
go_interface_addr,
wpabuf_head(req), wpabuf_len(req), 200) < 0) {
p2p_dbg(p2p, "Failed to send Action frame");
}
wpabuf_free(req);
return 0;
}
static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa,
size_t noa_len, u8 dialog_token)
{
struct wpabuf *resp;
u8 *len;
resp = wpabuf_alloc(100 + noa_len);
if (resp == NULL)
return NULL;
p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token);
len = p2p_buf_add_ie_hdr(resp);
p2p_buf_add_status(resp, status);
if (noa) {
wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE);
wpabuf_put_le16(resp, noa_len);
wpabuf_put_data(resp, noa, noa_len);
} else
p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL);
p2p_buf_update_ie_hdr(resp, len);
return resp;
}
static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
const u8 *sa, const u8 *data, size_t len,
int rx_freq)
{
struct p2p_message msg;
u8 status;
struct wpabuf *resp;
size_t g;
struct p2p_group *group = NULL;
int parsed = 0;
u8 noa[50];
int noa_len;
p2p_dbg(p2p, "Received P2P Action - P2P Presence Request");
for (g = 0; g < p2p->num_groups; g++) {
if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]),
ETH_ALEN) == 0) {
group = p2p->groups[g];
break;
}
}
if (group == NULL) {
p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group "
MACSTR, MAC2STR(da));
return;
}
if (p2p_parse(data, len, &msg) < 0) {
p2p_dbg(p2p, "Failed to parse P2P Presence Request");
status = P2P_SC_FAIL_INVALID_PARAMS;
goto fail;
}
parsed = 1;
if (msg.noa == NULL) {
p2p_dbg(p2p, "No NoA attribute in P2P Presence Request");
status = P2P_SC_FAIL_INVALID_PARAMS;
goto fail;
}
status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len);
fail:
if (p2p->cfg->get_noa)
noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa,
sizeof(noa));
else
noa_len = -1;
resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL,
noa_len > 0 ? noa_len : 0,
msg.dialog_token);
if (parsed)
p2p_parse_free(&msg);
if (resp == NULL)
return;
p2p->pending_action_state = P2P_NO_PENDING_ACTION;
if (p2p_send_action(p2p, rx_freq, sa, da, da,
wpabuf_head(resp), wpabuf_len(resp), 200) < 0) {
p2p_dbg(p2p, "Failed to send Action frame");
}
wpabuf_free(resp);
}
static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
const u8 *sa, const u8 *data, size_t len)
{
struct p2p_message msg;
p2p_dbg(p2p, "Received P2P Action - P2P Presence Response");
if (p2p_parse(data, len, &msg) < 0) {
p2p_dbg(p2p, "Failed to parse P2P Presence Response");
return;
}
if (msg.status == NULL || msg.noa == NULL) {
p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response");
p2p_parse_free(&msg);
return;
}
if (*msg.status) {
p2p_dbg(p2p, "P2P Presence Request was rejected: status %u",
*msg.status);
p2p_parse_free(&msg);
return;
}
p2p_dbg(p2p, "P2P Presence Request was accepted");
wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA",
msg.noa, msg.noa_len);
/* TODO: process NoA */
p2p_parse_free(&msg);
}
static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx)
{
struct p2p_data *p2p = eloop_ctx;
if (p2p->ext_listen_interval) {
/* Schedule next extended listen timeout */
eloop_register_timeout(p2p->ext_listen_interval_sec,
p2p->ext_listen_interval_usec,
p2p_ext_listen_timeout, p2p, NULL);
}
if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) {
/*
* This should not really happen, but it looks like the Listen
* command may fail is something else (e.g., a scan) was
* running at an inconvenient time. As a workaround, allow new
* Extended Listen operation to be started.
*/
p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again");
p2p->ext_listen_only = 0;
p2p_set_state(p2p, P2P_IDLE);
}
if (p2p->state != P2P_IDLE) {
p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state));
return;
}
p2p_dbg(p2p, "Extended Listen timeout");
p2p->ext_listen_only = 1;
if (p2p_listen(p2p, p2p->ext_listen_period) < 0) {
p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing");
p2p->ext_listen_only = 0;
}
}
int p2p_ext_listen(struct p2p_data *p2p, unsigned int period,
unsigned int interval)
{
if (period > 65535 || interval > 65535 || period > interval ||
(period == 0 && interval > 0) || (period > 0 && interval == 0)) {
p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u",
period, interval);
return -1;
}
eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
if (interval == 0) {
p2p_dbg(p2p, "Disabling Extended Listen Timing");
p2p->ext_listen_period = 0;
p2p->ext_listen_interval = 0;
return 0;
}
p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec",
period, interval);
p2p->ext_listen_period = period;
p2p->ext_listen_interval = interval;
p2p->ext_listen_interval_sec = interval / 1000;
p2p->ext_listen_interval_usec = (interval % 1000) * 1000;
eloop_register_timeout(p2p->ext_listen_interval_sec,
p2p->ext_listen_interval_usec,
p2p_ext_listen_timeout, p2p, NULL);
return 0;
}
void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
const u8 *ie, size_t ie_len)
{
struct p2p_message msg;
if (bssid == NULL || ie == NULL)
return;
os_memset(&msg, 0, sizeof(msg));
if (p2p_parse_ies(ie, ie_len, &msg))
return;
if (msg.minor_reason_code == NULL)
return;
p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR
" reason_code=%u minor_reason_code=%u",
MAC2STR(bssid), reason_code, *msg.minor_reason_code);
p2p_parse_free(&msg);
}
void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
const u8 *ie, size_t ie_len)
{
struct p2p_message msg;
if (bssid == NULL || ie == NULL)
return;
os_memset(&msg, 0, sizeof(msg));
if (p2p_parse_ies(ie, ie_len, &msg))
return;
if (msg.minor_reason_code == NULL)
return;
p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR
" reason_code=%u minor_reason_code=%u",
MAC2STR(bssid), reason_code, *msg.minor_reason_code);
p2p_parse_free(&msg);
}
void p2p_set_managed_oper(struct p2p_data *p2p, int enabled)
{
if (enabled) {
p2p_dbg(p2p, "Managed P2P Device operations enabled");
p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED;
} else {
p2p_dbg(p2p, "Managed P2P Device operations disabled");
p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED;
}
}
int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel)
{
if (p2p_channel_to_freq(reg_class, channel) < 0)
return -1;
p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u",
reg_class, channel);
p2p->cfg->reg_class = reg_class;
p2p->cfg->channel = channel;
return 0;
}
int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len)
{
p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len));
if (postfix == NULL) {
p2p->cfg->ssid_postfix_len = 0;
return 0;
}
if (len > sizeof(p2p->cfg->ssid_postfix))
return -1;
os_memcpy(p2p->cfg->ssid_postfix, postfix, len);
p2p->cfg->ssid_postfix_len = len;
return 0;
}
int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel,
int cfg_op_channel)
{
if (p2p_channel_to_freq(op_reg_class, op_channel) < 0)
return -1;
p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u",
op_reg_class, op_channel);
p2p->cfg->op_reg_class = op_reg_class;
p2p->cfg->op_channel = op_channel;
p2p->cfg->cfg_op_channel = cfg_op_channel;
return 0;
}
int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan,
const struct p2p_channel *pref_chan)
{
struct p2p_channel *n;
if (pref_chan) {
n = os_malloc(num_pref_chan * sizeof(struct p2p_channel));
if (n == NULL)
return -1;
os_memcpy(n, pref_chan,
num_pref_chan * sizeof(struct p2p_channel));
} else
n = NULL;
os_free(p2p->cfg->pref_chan);
p2p->cfg->pref_chan = n;
p2p->cfg->num_pref_chan = num_pref_chan;
return 0;
}
int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr,
u8 *iface_addr)
{
struct p2p_device *dev = p2p_get_device(p2p, dev_addr);
if (dev == NULL || is_zero_ether_addr(dev->interface_addr))
return -1;
os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN);
return 0;
}
int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr,
u8 *dev_addr)
{
struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
if (dev == NULL)
return -1;
os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN);
return 0;
}
void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr)
{
os_memcpy(p2p->peer_filter, addr, ETH_ALEN);
if (is_zero_ether_addr(p2p->peer_filter))
p2p_dbg(p2p, "Disable peer filter");
else
p2p_dbg(p2p, "Enable peer filter for " MACSTR,
MAC2STR(p2p->peer_filter));
}
void p2p_set_cross_connect(struct p2p_data *p2p, int enabled)
{
p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled");
if (p2p->cross_connect == enabled)
return;
p2p->cross_connect = enabled;
/* TODO: may need to tear down any action group where we are GO(?) */
}
int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr)
{
struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
if (dev == NULL)
return -1;
if (dev->oper_freq <= 0)
return -1;
return dev->oper_freq;
}
void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled)
{
p2p_dbg(p2p, "Intra BSS distribution %s",
enabled ? "enabled" : "disabled");
p2p->cfg->p2p_intra_bss = enabled;
}
void p2p_update_channel_list(struct p2p_data *p2p, struct p2p_channels *chan)
{
p2p_dbg(p2p, "Update channel list");
os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels));
}
int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
const u8 *src, const u8 *bssid, const u8 *buf,
size_t len, unsigned int wait_time)
{
if (p2p->p2p_scan_running) {
p2p_dbg(p2p, "Delay Action frame TX until p2p_scan completes");
if (p2p->after_scan_tx) {
p2p_dbg(p2p, "Dropped previous pending Action frame TX");
os_free(p2p->after_scan_tx);
}
p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) +
len);
if (p2p->after_scan_tx == NULL)
return -1;
p2p->after_scan_tx->freq = freq;
os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN);
os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN);
os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN);
p2p->after_scan_tx->len = len;
p2p->after_scan_tx->wait_time = wait_time;
os_memcpy(p2p->after_scan_tx + 1, buf, len);
return 0;
}
return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid,
buf, len, wait_time);
}
void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5,
int freq_overall)
{
p2p_dbg(p2p, "Best channel: 2.4 GHz: %d, 5 GHz: %d, overall: %d",
freq_24, freq_5, freq_overall);
p2p->best_freq_24 = freq_24;
p2p->best_freq_5 = freq_5;
p2p->best_freq_overall = freq_overall;
}
void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq)
{
p2p_dbg(p2p, "Own frequency preference: %d MHz", freq);
p2p->own_freq_preference = freq;
}
const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p)
{
if (p2p == NULL || p2p->go_neg_peer == NULL)
return NULL;
return p2p->go_neg_peer->info.p2p_device_addr;
}
const struct p2p_peer_info *
p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next)
{
struct p2p_device *dev;
if (addr) {
dev = p2p_get_device(p2p, addr);
if (!dev)
return NULL;
if (!next) {
if (dev->flags & P2P_DEV_PROBE_REQ_ONLY)
return NULL;
return &dev->info;
} else {
do {
dev = dl_list_first(&dev->list,
struct p2p_device,
list);
if (&dev->list == &p2p->devices)
return NULL;
} while (dev->flags & P2P_DEV_PROBE_REQ_ONLY);
}
} else {
dev = dl_list_first(&p2p->devices, struct p2p_device, list);
if (!dev)
return NULL;
while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
dev = dl_list_first(&dev->list,
struct p2p_device,
list);
if (&dev->list == &p2p->devices)
return NULL;
}
}
return &dev->info;
}
int p2p_in_progress(struct p2p_data *p2p)
{
if (p2p == NULL)
return 0;
if (p2p->state == P2P_SEARCH || p2p->state == P2P_SEARCH_WHEN_READY ||
p2p->state == P2P_CONTINUE_SEARCH_WHEN_READY)
return 2;
return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING;
}
void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout,
u8 client_timeout)
{
if (p2p) {
p2p->go_timeout = go_timeout;
p2p->client_timeout = client_timeout;
}
}
void p2p_increase_search_delay(struct p2p_data *p2p, unsigned int delay)
{
if (p2p && p2p->search_delay < delay)
p2p->search_delay = delay;
}
#ifdef CONFIG_WIFI_DISPLAY
static void p2p_update_wfd_ie_groups(struct p2p_data *p2p)
{
size_t g;
struct p2p_group *group;
for (g = 0; g < p2p->num_groups; g++) {
group = p2p->groups[g];
p2p_group_update_ies(group);
}
}
int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie)
{
wpabuf_free(p2p->wfd_ie_beacon);
p2p->wfd_ie_beacon = ie;
p2p_update_wfd_ie_groups(p2p);
return 0;
}
int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie)
{
wpabuf_free(p2p->wfd_ie_probe_req);
p2p->wfd_ie_probe_req = ie;
return 0;
}
int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie)
{
wpabuf_free(p2p->wfd_ie_probe_resp);
p2p->wfd_ie_probe_resp = ie;
p2p_update_wfd_ie_groups(p2p);
return 0;
}
int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie)
{
wpabuf_free(p2p->wfd_ie_assoc_req);
p2p->wfd_ie_assoc_req = ie;
return 0;
}
int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie)
{
wpabuf_free(p2p->wfd_ie_invitation);
p2p->wfd_ie_invitation = ie;
return 0;
}
int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie)
{
wpabuf_free(p2p->wfd_ie_prov_disc_req);
p2p->wfd_ie_prov_disc_req = ie;
return 0;
}
int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie)
{
wpabuf_free(p2p->wfd_ie_prov_disc_resp);
p2p->wfd_ie_prov_disc_resp = ie;
return 0;
}
int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie)
{
wpabuf_free(p2p->wfd_ie_go_neg);
p2p->wfd_ie_go_neg = ie;
return 0;
}
int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem)
{
wpabuf_free(p2p->wfd_dev_info);
if (elem) {
p2p->wfd_dev_info = wpabuf_dup(elem);
if (p2p->wfd_dev_info == NULL)
return -1;
} else
p2p->wfd_dev_info = NULL;
return 0;
}
int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem)
{
wpabuf_free(p2p->wfd_assoc_bssid);
if (elem) {
p2p->wfd_assoc_bssid = wpabuf_dup(elem);
if (p2p->wfd_assoc_bssid == NULL)
return -1;
} else
p2p->wfd_assoc_bssid = NULL;
return 0;
}
int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p,
const struct wpabuf *elem)
{
wpabuf_free(p2p->wfd_coupled_sink_info);
if (elem) {
p2p->wfd_coupled_sink_info = wpabuf_dup(elem);
if (p2p->wfd_coupled_sink_info == NULL)
return -1;
} else
p2p->wfd_coupled_sink_info = NULL;
return 0;
}
#endif /* CONFIG_WIFI_DISPLAY */
int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int,
int max_disc_tu)
{
if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0)
return -1;
p2p->min_disc_int = min_disc_int;
p2p->max_disc_int = max_disc_int;
p2p->max_disc_tu = max_disc_tu;
p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d",
min_disc_int, max_disc_int, max_disc_tu);
return 0;
}
void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...)
{
va_list ap;
char buf[500];
if (!p2p->cfg->debug_print)
return;
va_start(ap, fmt);
vsnprintf(buf, sizeof(buf), fmt, ap);
buf[sizeof(buf) - 1] = '\0';
va_end(ap);
p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf);
}
void p2p_info(struct p2p_data *p2p, const char *fmt, ...)
{
va_list ap;
char buf[500];
if (!p2p->cfg->debug_print)
return;
va_start(ap, fmt);
vsnprintf(buf, sizeof(buf), fmt, ap);
buf[sizeof(buf) - 1] = '\0';
va_end(ap);
p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf);
}
void p2p_err(struct p2p_data *p2p, const char *fmt, ...)
{
va_list ap;
char buf[500];
if (!p2p->cfg->debug_print)
return;
va_start(ap, fmt);
vsnprintf(buf, sizeof(buf), fmt, ap);
buf[sizeof(buf) - 1] = '\0';
va_end(ap);
p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf);
}
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