wpa_supplicant: Initial Revision 0.8.X
Based on:
commit 0725cc7b7efc434910e89865c42eda7ce61bbf08
Author: Jouni Malinen <j@w1.fi>
Date: Thu Apr 21 20:41:01 2011 +0300
Enable CONFIG_DRIVER_NL80211=y in the default configuration
nl80211 should be preferred over WEXT with any recent Linux
kernel version.
Change-Id: I26aec5afbbd4f4a1f5fd900912545b6f5050de64
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
diff --git a/src/p2p/p2p_invitation.c b/src/p2p/p2p_invitation.c
new file mode 100644
index 0000000..bb2767d
--- /dev/null
+++ b/src/p2p/p2p_invitation.c
@@ -0,0 +1,489 @@
+/*
+ * Wi-Fi Direct - P2P Invitation procedure
+ * Copyright (c) 2010, Atheros Communications
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Alternatively, this software may be distributed under the terms of BSD
+ * license.
+ *
+ * See README and COPYING for more details.
+ */
+
+#include "includes.h"
+
+#include "common.h"
+#include "common/ieee802_11_defs.h"
+#include "p2p_i.h"
+#include "p2p.h"
+
+
+static struct wpabuf * p2p_build_invitation_req(struct p2p_data *p2p,
+ struct p2p_device *peer,
+ const u8 *go_dev_addr)
+{
+ struct wpabuf *buf;
+ u8 *len;
+ const u8 *dev_addr;
+
+ buf = wpabuf_alloc(1000);
+ if (buf == NULL)
+ return NULL;
+
+ peer->dialog_token++;
+ if (peer->dialog_token == 0)
+ peer->dialog_token = 1;
+ p2p_buf_add_public_action_hdr(buf, P2P_INVITATION_REQ,
+ peer->dialog_token);
+
+ len = p2p_buf_add_ie_hdr(buf);
+ if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO || !p2p->inv_persistent)
+ p2p_buf_add_config_timeout(buf, 0, 0);
+ else
+ p2p_buf_add_config_timeout(buf, 100, 20);
+ p2p_buf_add_invitation_flags(buf, p2p->inv_persistent ?
+ P2P_INVITATION_FLAGS_TYPE : 0);
+ p2p_buf_add_operating_channel(buf, p2p->cfg->country,
+ p2p->op_reg_class, p2p->op_channel);
+ if (p2p->inv_bssid_set)
+ p2p_buf_add_group_bssid(buf, p2p->inv_bssid);
+ p2p_buf_add_channel_list(buf, p2p->cfg->country, &p2p->channels);
+ if (go_dev_addr)
+ dev_addr = go_dev_addr;
+ else if (p2p->inv_role == P2P_INVITE_ROLE_CLIENT)
+ dev_addr = peer->info.p2p_device_addr;
+ else
+ dev_addr = p2p->cfg->dev_addr;
+ p2p_buf_add_group_id(buf, dev_addr, p2p->inv_ssid, p2p->inv_ssid_len);
+ p2p_buf_add_device_info(buf, p2p, peer);
+ p2p_buf_update_ie_hdr(buf, len);
+
+ return buf;
+}
+
+
+static struct wpabuf * p2p_build_invitation_resp(struct p2p_data *p2p,
+ struct p2p_device *peer,
+ u8 dialog_token, u8 status,
+ const u8 *group_bssid,
+ u8 reg_class, u8 channel,
+ struct p2p_channels *channels)
+{
+ struct wpabuf *buf;
+ u8 *len;
+
+ buf = wpabuf_alloc(1000);
+ if (buf == NULL)
+ return NULL;
+
+ p2p_buf_add_public_action_hdr(buf, P2P_INVITATION_RESP,
+ dialog_token);
+
+ len = p2p_buf_add_ie_hdr(buf);
+ p2p_buf_add_status(buf, status);
+ p2p_buf_add_config_timeout(buf, 0, 0); /* FIX */
+ if (reg_class && channel)
+ p2p_buf_add_operating_channel(buf, p2p->cfg->country,
+ reg_class, channel);
+ if (group_bssid)
+ p2p_buf_add_group_bssid(buf, group_bssid);
+ if (channels)
+ p2p_buf_add_channel_list(buf, p2p->cfg->country, channels);
+ p2p_buf_update_ie_hdr(buf, len);
+
+ return buf;
+}
+
+
+void p2p_process_invitation_req(struct p2p_data *p2p, const u8 *sa,
+ const u8 *data, size_t len, int rx_freq)
+{
+ struct p2p_device *dev;
+ struct p2p_message msg;
+ struct wpabuf *resp = NULL;
+ u8 status = P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE;
+ int freq;
+ int go = 0;
+ u8 group_bssid[ETH_ALEN], *bssid;
+ int op_freq = 0;
+ u8 reg_class = 0, channel = 0;
+ struct p2p_channels intersection, *channels = NULL;
+ int persistent;
+
+ os_memset(group_bssid, 0, sizeof(group_bssid));
+
+ wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
+ "P2P: Received Invitation Request from " MACSTR " (freq=%d)",
+ MAC2STR(sa), rx_freq);
+
+ if (p2p_parse(data, len, &msg))
+ return;
+
+ dev = p2p_get_device(p2p, sa);
+ if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) {
+ wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
+ "P2P: Invitation Request from unknown peer "
+ MACSTR, MAC2STR(sa));
+
+ if (p2p_add_device(p2p, sa, rx_freq, 0, data + 1, len - 1)) {
+ wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
+ "P2P: Invitation Request add device failed "
+ MACSTR, MAC2STR(sa));
+ status = P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE;
+ goto fail;
+ }
+
+ dev = p2p_get_device(p2p, sa);
+ if (dev == NULL) {
+ wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
+ "P2P: Reject Invitation Request from unknown "
+ "peer " MACSTR, MAC2STR(sa));
+ status = P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE;
+ goto fail;
+ }
+ }
+
+ if (!msg.group_id || !msg.channel_list) {
+ wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
+ "P2P: Mandatory attribute missing in Invitation "
+ "Request from " MACSTR, MAC2STR(sa));
+ status = P2P_SC_FAIL_INVALID_PARAMS;
+ goto fail;
+ }
+
+ if (msg.invitation_flags)
+ persistent = *msg.invitation_flags & P2P_INVITATION_FLAGS_TYPE;
+ else {
+ /* Invitation Flags is a mandatory attribute starting from P2P
+ * spec 1.06. As a backwards compatibility mechanism, assume
+ * the request was for a persistent group if the attribute is
+ * missing.
+ */
+ wpa_printf(MSG_DEBUG, "P2P: Mandatory Invitation Flags "
+ "attribute missing from Invitation Request");
+ persistent = 1;
+ }
+
+ if (p2p_peer_channels_check(p2p, &p2p->cfg->channels, dev,
+ msg.channel_list, msg.channel_list_len) <
+ 0) {
+ wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
+ "P2P: No common channels found");
+ status = P2P_SC_FAIL_NO_COMMON_CHANNELS;
+ goto fail;
+ }
+
+ if (p2p->cfg->invitation_process) {
+ status = p2p->cfg->invitation_process(
+ p2p->cfg->cb_ctx, sa, msg.group_bssid, msg.group_id,
+ msg.group_id + ETH_ALEN, msg.group_id_len - ETH_ALEN,
+ &go, group_bssid, &op_freq, persistent);
+ }
+
+ if (op_freq) {
+ if (p2p_freq_to_channel(p2p->cfg->country, op_freq,
+ ®_class, &channel) < 0) {
+ wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
+ "P2P: Unknown forced freq %d MHz from "
+ "invitation_process()", op_freq);
+ status = P2P_SC_FAIL_NO_COMMON_CHANNELS;
+ goto fail;
+ }
+
+ p2p_channels_intersect(&p2p->cfg->channels, &dev->channels,
+ &intersection);
+ if (!p2p_channels_includes(&intersection, reg_class, channel))
+ {
+ wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
+ "P2P: forced freq %d MHz not in the supported "
+ "channels interaction", op_freq);
+ status = P2P_SC_FAIL_NO_COMMON_CHANNELS;
+ goto fail;
+ }
+
+ if (status == P2P_SC_SUCCESS)
+ channels = &intersection;
+ } else {
+ op_freq = p2p_channel_to_freq(p2p->cfg->country,
+ p2p->cfg->op_reg_class,
+ p2p->cfg->op_channel);
+ if (op_freq < 0) {
+ wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
+ "P2P: Unknown operational channel "
+ "(country=%c%c reg_class=%u channel=%u)",
+ p2p->cfg->country[0], p2p->cfg->country[1],
+ p2p->cfg->op_reg_class, p2p->cfg->op_channel);
+ status = P2P_SC_FAIL_NO_COMMON_CHANNELS;
+ goto fail;
+ }
+
+ p2p_channels_intersect(&p2p->cfg->channels, &dev->channels,
+ &intersection);
+ if (status == P2P_SC_SUCCESS) {
+ reg_class = p2p->cfg->op_reg_class;
+ channel = p2p->cfg->op_channel;
+ channels = &intersection;
+ }
+ }
+
+fail:
+ if (go && status == P2P_SC_SUCCESS && !is_zero_ether_addr(group_bssid))
+ bssid = group_bssid;
+ else
+ bssid = NULL;
+ resp = p2p_build_invitation_resp(p2p, dev, msg.dialog_token, status,
+ bssid, reg_class, channel, channels);
+
+ if (resp == NULL)
+ goto out;
+
+ if (rx_freq > 0)
+ freq = rx_freq;
+ else
+ freq = p2p_channel_to_freq(p2p->cfg->country,
+ p2p->cfg->reg_class,
+ p2p->cfg->channel);
+ if (freq < 0) {
+ wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
+ "P2P: Unknown regulatory class/channel");
+ goto out;
+ }
+
+ /*
+ * Store copy of invitation data to be used when processing TX status
+ * callback for the Acton frame.
+ */
+ os_memcpy(p2p->inv_sa, sa, ETH_ALEN);
+ if (msg.group_bssid) {
+ os_memcpy(p2p->inv_group_bssid, msg.group_bssid, ETH_ALEN);
+ p2p->inv_group_bssid_ptr = p2p->inv_group_bssid;
+ } else
+ p2p->inv_group_bssid_ptr = NULL;
+ if (msg.group_id_len - ETH_ALEN <= 32) {
+ os_memcpy(p2p->inv_ssid, msg.group_id + ETH_ALEN,
+ msg.group_id_len - ETH_ALEN);
+ p2p->inv_ssid_len = msg.group_id_len - ETH_ALEN;
+ }
+ os_memcpy(p2p->inv_go_dev_addr, msg.group_id, ETH_ALEN);
+ p2p->inv_status = status;
+ p2p->inv_op_freq = op_freq;
+
+ p2p->pending_action_state = P2P_PENDING_INVITATION_RESPONSE;
+ if (p2p_send_action(p2p, freq, sa, p2p->cfg->dev_addr,
+ p2p->cfg->dev_addr,
+ wpabuf_head(resp), wpabuf_len(resp), 200) < 0) {
+ wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
+ "P2P: Failed to send Action frame");
+ }
+
+out:
+ wpabuf_free(resp);
+ p2p_parse_free(&msg);
+}
+
+
+void p2p_process_invitation_resp(struct p2p_data *p2p, const u8 *sa,
+ const u8 *data, size_t len)
+{
+ struct p2p_device *dev;
+ struct p2p_message msg;
+
+ wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
+ "P2P: Received Invitation Response from " MACSTR,
+ MAC2STR(sa));
+
+ dev = p2p_get_device(p2p, sa);
+ if (dev == NULL) {
+ wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
+ "P2P: Ignore Invitation Response from unknown peer "
+ MACSTR, MAC2STR(sa));
+ return;
+ }
+
+ if (dev != p2p->invite_peer) {
+ wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
+ "P2P: Ignore unexpected Invitation Response from peer "
+ MACSTR, MAC2STR(sa));
+ return;
+ }
+
+ if (p2p_parse(data, len, &msg))
+ return;
+
+ if (!msg.status) {
+ wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
+ "P2P: Mandatory Status attribute missing in "
+ "Invitation Response from " MACSTR, MAC2STR(sa));
+ p2p_parse_free(&msg);
+ return;
+ }
+
+ if (p2p->cfg->invitation_result)
+ p2p->cfg->invitation_result(p2p->cfg->cb_ctx, *msg.status,
+ msg.group_bssid);
+
+ p2p_parse_free(&msg);
+
+ p2p_clear_timeout(p2p);
+ p2p_set_state(p2p, P2P_IDLE);
+ p2p->invite_peer = NULL;
+}
+
+
+int p2p_invite_send(struct p2p_data *p2p, struct p2p_device *dev,
+ const u8 *go_dev_addr)
+{
+ struct wpabuf *req;
+ int freq;
+
+ freq = dev->listen_freq > 0 ? dev->listen_freq : dev->oper_freq;
+ if (freq <= 0) {
+ wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
+ "P2P: No Listen/Operating frequency known for the "
+ "peer " MACSTR " to send Invitation Request",
+ MAC2STR(dev->info.p2p_device_addr));
+ return -1;
+ }
+
+ req = p2p_build_invitation_req(p2p, dev, go_dev_addr);
+ if (req == NULL)
+ return -1;
+ wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
+ "P2P: Sending Invitation Request");
+ p2p_set_state(p2p, P2P_INVITE);
+ p2p->pending_action_state = P2P_PENDING_INVITATION_REQUEST;
+ p2p->invite_peer = dev;
+ dev->invitation_reqs++;
+ if (p2p_send_action(p2p, freq, dev->info.p2p_device_addr,
+ p2p->cfg->dev_addr, dev->info.p2p_device_addr,
+ wpabuf_head(req), wpabuf_len(req), 200) < 0) {
+ wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
+ "P2P: Failed to send Action frame");
+ /* Use P2P find to recover and retry */
+ p2p_set_timeout(p2p, 0, 0);
+ }
+
+ wpabuf_free(req);
+
+ return 0;
+}
+
+
+void p2p_invitation_req_cb(struct p2p_data *p2p, int success)
+{
+ wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
+ "P2P: Invitation Request TX callback: success=%d", success);
+
+ if (p2p->invite_peer == NULL) {
+ wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
+ "P2P: No pending Invite");
+ return;
+ }
+
+ /*
+ * Use P2P find, if needed, to find the other device from its listen
+ * channel.
+ */
+ p2p_set_state(p2p, P2P_INVITE);
+ p2p_set_timeout(p2p, 0, 100000);
+}
+
+
+void p2p_invitation_resp_cb(struct p2p_data *p2p, int success)
+{
+ wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
+ "P2P: Invitation Response TX callback: success=%d", success);
+ p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
+
+ if (success && p2p->cfg->invitation_received) {
+ p2p->cfg->invitation_received(p2p->cfg->cb_ctx,
+ p2p->inv_sa,
+ p2p->inv_group_bssid_ptr,
+ p2p->inv_ssid, p2p->inv_ssid_len,
+ p2p->inv_go_dev_addr,
+ p2p->inv_status,
+ p2p->inv_op_freq);
+ }
+}
+
+
+int p2p_invite(struct p2p_data *p2p, const u8 *peer, enum p2p_invite_role role,
+ const u8 *bssid, const u8 *ssid, size_t ssid_len,
+ unsigned int force_freq, const u8 *go_dev_addr,
+ int persistent_group)
+{
+ struct p2p_device *dev;
+
+ wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
+ "P2P: Request to invite peer " MACSTR " role=%d persistent=%d "
+ "force_freq=%u",
+ MAC2STR(peer), role, persistent_group, force_freq);
+ if (bssid)
+ wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
+ "P2P: Invitation for BSSID " MACSTR, MAC2STR(bssid));
+ if (go_dev_addr) {
+ wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
+ "P2P: Invitation for GO Device Address " MACSTR,
+ MAC2STR(go_dev_addr));
+ os_memcpy(p2p->invite_go_dev_addr_buf, go_dev_addr, ETH_ALEN);
+ p2p->invite_go_dev_addr = p2p->invite_go_dev_addr_buf;
+ } else
+ p2p->invite_go_dev_addr = NULL;
+ wpa_hexdump_ascii(MSG_DEBUG, "P2P: Invitation for SSID",
+ ssid, ssid_len);
+
+ dev = p2p_get_device(p2p, peer);
+ if (dev == NULL || (dev->listen_freq <= 0 && dev->oper_freq <= 0)) {
+ wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
+ "P2P: Cannot invite unknown P2P Device " MACSTR,
+ MAC2STR(peer));
+ return -1;
+ }
+
+ if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) {
+ if (!(dev->info.dev_capab &
+ P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) {
+ wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
+ "P2P: Cannot invite a P2P Device " MACSTR
+ " that is in a group and is not discoverable",
+ MAC2STR(peer));
+ }
+ /* TODO: use device discoverability request through GO */
+ }
+
+ dev->invitation_reqs = 0;
+
+ if (force_freq) {
+ if (p2p_freq_to_channel(p2p->cfg->country, force_freq,
+ &p2p->op_reg_class, &p2p->op_channel) <
+ 0) {
+ wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
+ "P2P: Unsupported frequency %u MHz",
+ force_freq);
+ return -1;
+ }
+ 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 {
+ p2p->op_reg_class = p2p->cfg->op_reg_class;
+ p2p->op_channel = p2p->cfg->op_channel;
+ os_memcpy(&p2p->channels, &p2p->cfg->channels,
+ sizeof(struct p2p_channels));
+ }
+
+ if (p2p->state != P2P_IDLE)
+ p2p_stop_find(p2p);
+
+ p2p->inv_role = role;
+ p2p->inv_bssid_set = bssid != NULL;
+ if (bssid)
+ os_memcpy(p2p->inv_bssid, bssid, ETH_ALEN);
+ os_memcpy(p2p->inv_ssid, ssid, ssid_len);
+ p2p->inv_ssid_len = ssid_len;
+ p2p->inv_persistent = persistent_group;
+ return p2p_invite_send(p2p, dev, go_dev_addr);
+}