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fragattacks/src/p2p/p2p.c
Rashmi Ramanna 41d5ce9e0b P2P: Optimize scan for GO during persistent group invocation 
Scan for GO on the negotiated operating channel for few iterations
before searching on all the supported channels during persistent group
reinvocation. In addition, use the already known SSID of the group in
the scans. These optimizations reduce group formation time.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
2014-03-25 15:38:33 +02:00

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120 KiB
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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
*/
#ifndef P2P_PEER_EXPIRATION_AGE
#define P2P_PEER_EXPIRATION_AGE 60
#endif /* P2P_PEER_EXPIRATION_AGE */
#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_reltime now;
size_t i;
os_get_reltime(&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 (dev == p2p->go_neg_peer) {
/*
* GO Negotiation is in progress with the peer, so
* don't expire the peer entry until GO Negotiation
* fails or times out.
*/
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_reltime(&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_reltime(&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";
default:
return "?";
}
}
const char * p2p_get_state_txt(struct p2p_data *p2p)
{
return p2p_state_txt(p2p->state);
}
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->oob_pw_id = 0;
}
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_reltime_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_reltime(&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_reltime *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_reltime 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_reltime(&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_reltime_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_reltime));
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 (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 {
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_reltime(&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 (p2p->p2p_scan_running) {
p2p_dbg(p2p, "Failed to start p2p_scan - another p2p_scan was already running");
/* wait for the previous p2p_scan to complete */
res = 0; /* do not report failure */
} 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;
}
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->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_listen(struct p2p_data *p2p)
{
if (p2p->state != P2P_LISTEN_ONLY) {
p2p_dbg(p2p, "Skip stop_listen since not in listen_only state.");
return;
}
p2p_stop_listen_for_freq(p2p, 0);
p2p_set_state(p2p, P2P_IDLE);
}
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, int go)
{
u8 op_class, op_channel;
unsigned int freq = force_freq ? force_freq : pref_freq;
p2p_dbg(p2p, "Prepare channel pref - force_freq=%u pref_freq=%u go=%d",
force_freq, pref_freq, go);
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) &&
(go || !p2p_channels_includes(&p2p->cfg->cli_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;
const int op_classes_5ghz[] = { 124, 115, 0 };
const int op_classes_ht40[] = { 126, 127, 116, 117, 0 };
const int op_classes_vht[] = { 128, 0 };
p2p_dbg(p2p, "Prepare channel best");
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 if (p2p->cfg->num_pref_chan > 0 &&
p2p_channels_includes(&p2p->cfg->channels,
p2p->cfg->pref_chan[0].op_class,
p2p->cfg->pref_chan[0].chan)) {
p2p_dbg(p2p, "Select first pref_chan entry as operating channel preference");
p2p->op_reg_class = p2p->cfg->pref_chan[0].op_class;
p2p->op_channel = p2p->cfg->pref_chan[0].chan;
} else if (p2p_channel_select(&p2p->cfg->channels, op_classes_vht,
&p2p->op_reg_class, &p2p->op_channel) ==
0) {
p2p_dbg(p2p, "Select possible VHT channel (op_class %u channel %u) as operating channel preference",
p2p->op_reg_class, p2p->op_channel);
} else if (p2p_channel_select(&p2p->cfg->channels, op_classes_ht40,
&p2p->op_reg_class, &p2p->op_channel) ==
0) {
p2p_dbg(p2p, "Select possible HT40 channel (op_class %u channel %u) as operating channel preference",
p2p->op_reg_class, p2p->op_channel);
} else if (p2p_channel_select(&p2p->cfg->channels, op_classes_5ghz,
&p2p->op_reg_class, &p2p->op_channel) ==
0) {
p2p_dbg(p2p, "Select possible 5 GHz channel (op_class %u channel %u) as operating channel preference",
p2p->op_reg_class, p2p->op_channel);
} else if (p2p_channels_includes(&p2p->cfg->channels,
p2p->cfg->op_reg_class,
p2p->cfg->op_channel)) {
p2p_dbg(p2p, "Select pre-configured channel as operating channel preference");
p2p->op_reg_class = p2p->cfg->op_reg_class;
p2p->op_channel = p2p->cfg->op_channel;
} else if (p2p_channel_random_social(&p2p->cfg->channels,
&p2p->op_reg_class,
&p2p->op_channel) == 0) {
p2p_dbg(p2p, "Select random available social channel %d from 2.4 GHz band as operating channel preference",
p2p->op_channel);
} else {
/* Select any random available channel from the first available
* operating class */
p2p_channel_select(&p2p->cfg->channels, NULL,
&p2p->op_reg_class,
&p2p->op_channel);
p2p_dbg(p2p, "Select random available channel %d from operating class %d as operating channel preference",
p2p->op_channel, p2p->op_reg_class);
}
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
* @go: Whether the local end will be forced to be GO
* 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, int go)
{
p2p_dbg(p2p, "Prepare channel - force_freq=%u pref_freq=%u go=%d",
force_freq, pref_freq, go);
if (force_freq || pref_freq) {
if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq, go) <
0)
return -1;
} else {
p2p_prepare_channel_best(p2p);
}
p2p_channels_dump(p2p, "prepared channels", &p2p->channels);
if (go)
p2p_channels_remove_freqs(&p2p->channels, &p2p->no_go_freq);
else if (!force_freq)
p2p_channels_union(&p2p->channels, &p2p->cfg->cli_channels,
&p2p->channels);
p2p_channels_dump(p2p, "after go/cli filter/add", &p2p->channels);
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, u16 oob_pw_id)
{
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 "
"oob_pw_id=%u",
MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
wps_method, persistent_group, pd_before_go_neg, oob_pw_id);
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,
go_intent == 15) < 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->oob_pw_id = oob_pw_id;
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, u16 oob_pw_id)
{
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 oob_pw_id=%u",
MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
wps_method, persistent_group, oob_pw_id);
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, go_intent ==
15) < 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->oob_pw_id = oob_pw_id;
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_reltime(&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_dump(p2p, "own channels", &p2p->channels);
p2p_channels_dump(p2p, "peer channels", &peer->channels);
p2p_channels_intersect(&p2p->channels, &peer->channels,
&intersection);
if (go) {
p2p_channels_remove_freqs(&intersection, &p2p->no_go_freq);
p2p_channels_dump(p2p, "intersection after no-GO removal",
&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;
peer->oob_pw_id = 0;
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->cfg->send_action_done(p2p->cfg->cb_ctx);
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 < 4)
return;
if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
return;
data += 4;
len -= 4;
p2p_rx_p2p_action(p2p, sa, data, len, 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_BE32(data) != P2P_IE_VENDOR_TYPE)
return;
data += 4;
len -= 4;
/* 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,
p2p->invite_dev_pw_id);
}
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_reltime(&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_reltime(&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_reltime(&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);
}
if (p2p_build_wps_ie(p2p, buf, pw_id, 1) < 0) {
p2p_dbg(p2p, "Failed to build WPS IE for Probe Response");
wpabuf_free(buf);
return NULL;
}
#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 */
p2p_dbg(p2p, "Not in Listen state (in_listen=%d drv_in_listen=%d) - ignore Probe Request",
p2p->in_listen, p2p->drv_in_listen);
return P2P_PREQ_NOT_LISTEN;
}
if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) ==
ParseFailed) {
/* Ignore invalid Probe Request frames */
p2p_dbg(p2p, "Could not parse Probe Request frame - ignore it");
return P2P_PREQ_MALFORMED;
}
if (elems.p2p == NULL) {
/* not a P2P probe - ignore it */
p2p_dbg(p2p, "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
*/
p2p_dbg(p2p, "Probe Req DA " MACSTR " not ours - ignore it",
MAC2STR(dst));
return P2P_PREQ_NOT_PROCESSED;
}
if (bssid && !is_broadcast_ether_addr(bssid)) {
/* Not sent to the Wildcard BSSID */
p2p_dbg(p2p, "Probe Req BSSID " MACSTR " not wildcard - ignore it",
MAC2STR(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 */
p2p_dbg(p2p, "Probe Req not using P2P Wildcard SSID - ignore it");
return P2P_PREQ_NOT_PROCESSED;
}
if (supp_rates_11b_only(&elems)) {
/* Indicates support for 11b rates only */
p2p_dbg(p2p, "Probe Req with 11b rates only supported - ignore it");
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 */
p2p_dbg(p2p, "Could not parse P2P attributes in Probe Req - ignore it");
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_dbg(p2p, "Probe Req requested Device ID " MACSTR " did not match - ignore it",
MAC2STR(msg.device_id));
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_dbg(p2p, "Probe Req requestred Device Type did not match - ignore it");
p2p_parse_free(&msg);
return P2P_PREQ_NOT_PROCESSED;
}
p2p_parse_free(&msg);
if (!p2p->cfg->send_probe_resp) {
/* Response generated elsewhere */
p2p_dbg(p2p, "Probe Resp generated elsewhere - do not generate additional response");
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 &&
(p2p->invite_peer->flags & P2P_DEV_WAIT_INV_REQ_ACK) &&
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_cancel_timeout(p2p_invite_start, p2p, NULL);
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;
p2p->num_p2p_sd_queries = 0;
p2p_dbg(p2p, "initialized");
p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
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->no_go_freq.range);
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->oob_pw_id = 0;
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->sd_pending_bcast_queries == 0) {
/* Initialize with total number of registered broadcast
* SD queries. */
dev->sd_pending_bcast_queries = p2p->num_p2p_sd_queries;
}
if (p2p_start_sd(p2p, dev) == 0)
return;
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) {
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,
p2p->pd_force_freq);
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_reltime *rx_time, int level, const u8 *ies,
size_t ies_len)
{
if (os_reltime_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->send_action_in_progress) {
p2p->send_action_in_progress = 0;
p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
}
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;
}
if (p2p->go_neg_peer && p2p->go_neg_peer->oob_go_neg_freq > 0) {
p2p_dbg(p2p, "Skip connect-listen since GO Neg channel known (OOB)");
p2p_set_state(p2p, P2P_CONNECT_LISTEN);
p2p_set_timeout(p2p, 0, 30000);
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)
{
p2p_set_state(p2p, P2P_WAIT_PEER_IDLE);
if (p2p->cfg->is_concurrent_session_active &&
p2p->cfg->is_concurrent_session_active(p2p->cfg->cb_ctx))
p2p_set_timeout(p2p, 0, 500000);
else
p2p_set_timeout(p2p, 0, 200000);
}
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 = 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, p2p->invite_dev_pw_id);
} 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,
0, 0);
}
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;
}
}
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";
case WPS_NFC:
return "NFC";
}
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_reltime now;
if (info == NULL)
return -1;
dev = (struct p2p_device *) (((u8 *) info) -
offsetof(struct p2p_device, info));
pos = buf;
end = buf + buflen;
os_get_reltime(&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\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_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 (p2p->cfg->presence_resp) {
p2p->cfg->presence_resp(p2p->cfg->cb_ctx, sa, *msg.status,
msg.noa, msg.noa_len);
}
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) {
p2p_parse_free(&msg);
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) {
p2p_parse_free(&msg);
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_set_no_go_freq(struct p2p_data *p2p,
const struct wpa_freq_range_list *list)
{
struct wpa_freq_range *tmp;
if (list == NULL || list->num == 0) {
os_free(p2p->no_go_freq.range);
p2p->no_go_freq.range = NULL;
p2p->no_go_freq.num = 0;
return 0;
}
tmp = os_calloc(list->num, sizeof(struct wpa_freq_range));
if (tmp == NULL)
return -1;
os_memcpy(tmp, list->range, list->num * sizeof(struct wpa_freq_range));
os_free(p2p->no_go_freq.range);
p2p->no_go_freq.range = tmp;
p2p->no_go_freq.num = list->num;
p2p_dbg(p2p, "Updated no GO chan list");
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,
const struct p2p_channels *chan,
const struct p2p_channels *cli_chan)
{
p2p_dbg(p2p, "Update channel list");
os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels));
p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
os_memcpy(&p2p->cfg->cli_channels, cli_chan,
sizeof(struct p2p_channels));
p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_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)
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;
}
}
#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_force_beacon_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);
}
#ifdef CONFIG_WPS_NFC
static struct wpabuf * p2p_build_nfc_handover(struct p2p_data *p2p,
int client_freq,
const u8 *go_dev_addr,
const u8 *ssid, size_t ssid_len)
{
struct wpabuf *buf;
u8 op_class, channel;
enum p2p_role_indication role = P2P_DEVICE_NOT_IN_GROUP;
buf = wpabuf_alloc(1000);
if (buf == NULL)
return NULL;
op_class = p2p->cfg->reg_class;
channel = p2p->cfg->channel;
p2p_buf_add_capability(buf, p2p->dev_capab &
~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
p2p_buf_add_device_info(buf, p2p, NULL);
if (p2p->num_groups > 0) {
role = P2P_GO_IN_A_GROUP;
p2p_freq_to_channel(p2p_group_get_freq(p2p->groups[0]),
&op_class, &channel);
} else if (client_freq > 0) {
role = P2P_CLIENT_IN_A_GROUP;
p2p_freq_to_channel(client_freq, &op_class, &channel);
}
p2p_buf_add_oob_go_neg_channel(buf, p2p->cfg->country, op_class,
channel, role);
if (p2p->num_groups > 0) {
/* Limit number of clients to avoid very long message */
p2p_buf_add_group_info(p2p->groups[0], buf, 5);
p2p_group_buf_add_id(p2p->groups[0], buf);
} else if (client_freq > 0 &&
go_dev_addr && !is_zero_ether_addr(go_dev_addr) &&
ssid && ssid_len > 0) {
/*
* Add the optional P2P Group ID to indicate in which group this
* device is a P2P Client.
*/
p2p_buf_add_group_id(buf, go_dev_addr, ssid, ssid_len);
}
return buf;
}
struct wpabuf * p2p_build_nfc_handover_req(struct p2p_data *p2p,
int client_freq,
const u8 *go_dev_addr,
const u8 *ssid, size_t ssid_len)
{
return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
ssid_len);
}
struct wpabuf * p2p_build_nfc_handover_sel(struct p2p_data *p2p,
int client_freq,
const u8 *go_dev_addr,
const u8 *ssid, size_t ssid_len)
{
return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
ssid_len);
}
int p2p_process_nfc_connection_handover(struct p2p_data *p2p,
struct p2p_nfc_params *params)
{
struct p2p_message msg;
struct p2p_device *dev;
const u8 *p2p_dev_addr;
int freq;
enum p2p_role_indication role;
params->next_step = NO_ACTION;
if (p2p_parse_ies_separate(params->wsc_attr, params->wsc_len,
params->p2p_attr, params->p2p_len, &msg)) {
p2p_dbg(p2p, "Failed to parse WSC/P2P attributes from NFC");
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 (msg.oob_dev_password) {
os_memcpy(params->oob_dev_pw, msg.oob_dev_password,
msg.oob_dev_password_len);
params->oob_dev_pw_len = msg.oob_dev_password_len;
}
dev = p2p_create_device(p2p, p2p_dev_addr);
if (dev == NULL) {
p2p_parse_free(&msg);
return -1;
}
params->peer = &dev->info;
os_get_reltime(&dev->last_seen);
dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
p2p_copy_wps_info(p2p, dev, 0, &msg);
if (!msg.oob_go_neg_channel) {
p2p_dbg(p2p, "OOB GO Negotiation Channel attribute not included");
return -1;
}
if (msg.oob_go_neg_channel[3] == 0 &&
msg.oob_go_neg_channel[4] == 0)
freq = 0;
else
freq = p2p_channel_to_freq(msg.oob_go_neg_channel[3],
msg.oob_go_neg_channel[4]);
if (freq < 0) {
p2p_dbg(p2p, "Unknown peer OOB GO Neg channel");
return -1;
}
role = msg.oob_go_neg_channel[5];
if (role == P2P_GO_IN_A_GROUP) {
p2p_dbg(p2p, "Peer OOB GO operating channel: %u MHz", freq);
params->go_freq = freq;
} else if (role == P2P_CLIENT_IN_A_GROUP) {
p2p_dbg(p2p, "Peer (client) OOB GO operating channel: %u MHz",
freq);
params->go_freq = freq;
} else
p2p_dbg(p2p, "Peer OOB GO Neg channel: %u MHz", freq);
dev->oob_go_neg_freq = freq;
if (!params->sel && role != P2P_GO_IN_A_GROUP) {
freq = p2p_channel_to_freq(p2p->cfg->reg_class,
p2p->cfg->channel);
if (freq < 0) {
p2p_dbg(p2p, "Own listen channel not known");
return -1;
}
p2p_dbg(p2p, "Use own Listen channel as OOB GO Neg channel: %u MHz", freq);
dev->oob_go_neg_freq = freq;
}
if (msg.group_id) {
os_memcpy(params->go_dev_addr, msg.group_id, ETH_ALEN);
params->go_ssid_len = msg.group_id_len - ETH_ALEN;
os_memcpy(params->go_ssid, msg.group_id + ETH_ALEN,
params->go_ssid_len);
}
p2p_parse_free(&msg);
if (dev->flags & P2P_DEV_USER_REJECTED) {
p2p_dbg(p2p, "Do not report rejected device");
return 0;
}
if (!(dev->flags & P2P_DEV_REPORTED)) {
p2p->cfg->dev_found(p2p->cfg->cb_ctx, p2p_dev_addr, &dev->info,
!(dev->flags & P2P_DEV_REPORTED_ONCE));
dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
}
if (role == P2P_GO_IN_A_GROUP && p2p->num_groups > 0)
params->next_step = BOTH_GO;
else if (role == P2P_GO_IN_A_GROUP)
params->next_step = JOIN_GROUP;
else if (role == P2P_CLIENT_IN_A_GROUP) {
dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
params->next_step = PEER_CLIENT;
} else if (p2p->num_groups > 0)
params->next_step = AUTH_JOIN;
else if (params->sel)
params->next_step = INIT_GO_NEG;
else
params->next_step = RESP_GO_NEG;
return 0;
}
void p2p_set_authorized_oob_dev_pw_id(struct p2p_data *p2p, u16 dev_pw_id,
int go_intent,
const u8 *own_interface_addr)
{
p2p->authorized_oob_dev_pw_id = dev_pw_id;
if (dev_pw_id == 0) {
p2p_dbg(p2p, "NFC OOB Password unauthorized for static handover");
return;
}
p2p_dbg(p2p, "NFC OOB Password (id=%u) authorized for static handover",
dev_pw_id);
p2p->go_intent = go_intent;
os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
}
#endif /* CONFIG_WPS_NFC */
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