+++ /dev/null
-/*
- * P2P - IE parser
- * Copyright (c) 2009-2010, 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 "common/ieee802_11_common.h"
-#include "wps/wps_i.h"
-#include "p2p_i.h"
-
-
-static int p2p_parse_attribute(u8 id, const u8 *data, u16 len,
- struct p2p_message *msg)
-{
- const u8 *pos;
- size_t i, nlen;
- char devtype[WPS_DEV_TYPE_BUFSIZE];
-
- switch (id) {
- case P2P_ATTR_CAPABILITY:
- if (len < 2) {
- wpa_printf(MSG_DEBUG, "P2P: Too short Capability "
- "attribute (length %d)", len);
- return -1;
- }
- msg->capability = data;
- wpa_printf(MSG_DEBUG, "P2P: * Device Capability %02x "
- "Group Capability %02x",
- data[0], data[1]);
- break;
- case P2P_ATTR_DEVICE_ID:
- if (len < ETH_ALEN) {
- wpa_printf(MSG_DEBUG, "P2P: Too short Device ID "
- "attribute (length %d)", len);
- return -1;
- }
- msg->device_id = data;
- wpa_printf(MSG_DEBUG, "P2P: * Device ID " MACSTR,
- MAC2STR(msg->device_id));
- break;
- case P2P_ATTR_GROUP_OWNER_INTENT:
- if (len < 1) {
- wpa_printf(MSG_DEBUG, "P2P: Too short GO Intent "
- "attribute (length %d)", len);
- return -1;
- }
- msg->go_intent = data;
- wpa_printf(MSG_DEBUG, "P2P: * GO Intent: Intent %u "
- "Tie breaker %u", data[0] >> 1, data[0] & 0x01);
- break;
- case P2P_ATTR_STATUS:
- if (len < 1) {
- wpa_printf(MSG_DEBUG, "P2P: Too short Status "
- "attribute (length %d)", len);
- return -1;
- }
- msg->status = data;
- wpa_printf(MSG_DEBUG, "P2P: * Status: %d", data[0]);
- break;
- case P2P_ATTR_LISTEN_CHANNEL:
- if (len == 0) {
- wpa_printf(MSG_DEBUG, "P2P: * Listen Channel: Ignore "
- "null channel");
- break;
- }
- if (len < 5) {
- wpa_printf(MSG_DEBUG, "P2P: Too short Listen Channel "
- "attribute (length %d)", len);
- return -1;
- }
- msg->listen_channel = data;
- wpa_printf(MSG_DEBUG, "P2P: * Listen Channel: "
- "Country %c%c(0x%02x) Regulatory "
- "Class %d Channel Number %d", data[0], data[1],
- data[2], data[3], data[4]);
- break;
- case P2P_ATTR_OPERATING_CHANNEL:
- if (len == 0) {
- wpa_printf(MSG_DEBUG, "P2P: * Operating Channel: "
- "Ignore null channel");
- break;
- }
- if (len < 5) {
- wpa_printf(MSG_DEBUG, "P2P: Too short Operating "
- "Channel attribute (length %d)", len);
- return -1;
- }
- msg->operating_channel = data;
- wpa_printf(MSG_DEBUG, "P2P: * Operating Channel: "
- "Country %c%c(0x%02x) Regulatory "
- "Class %d Channel Number %d", data[0], data[1],
- data[2], data[3], data[4]);
- break;
- case P2P_ATTR_CHANNEL_LIST:
- if (len < 3) {
- wpa_printf(MSG_DEBUG, "P2P: Too short Channel List "
- "attribute (length %d)", len);
- return -1;
- }
- msg->channel_list = data;
- msg->channel_list_len = len;
- wpa_printf(MSG_DEBUG, "P2P: * Channel List: Country String "
- "'%c%c(0x%02x)'", data[0], data[1], data[2]);
- wpa_hexdump(MSG_MSGDUMP, "P2P: Channel List",
- msg->channel_list, msg->channel_list_len);
- break;
- case P2P_ATTR_GROUP_INFO:
- msg->group_info = data;
- msg->group_info_len = len;
- wpa_printf(MSG_DEBUG, "P2P: * Group Info");
- break;
- case P2P_ATTR_DEVICE_INFO:
- if (len < ETH_ALEN + 2 + 8 + 1) {
- wpa_printf(MSG_DEBUG, "P2P: Too short Device Info "
- "attribute (length %d)", len);
- return -1;
- }
- msg->p2p_device_info = data;
- msg->p2p_device_info_len = len;
- pos = data;
- msg->p2p_device_addr = pos;
- pos += ETH_ALEN;
- msg->config_methods = WPA_GET_BE16(pos);
- pos += 2;
- msg->pri_dev_type = pos;
- pos += 8;
- msg->num_sec_dev_types = *pos++;
- if (msg->num_sec_dev_types * 8 > data + len - pos) {
- wpa_printf(MSG_DEBUG, "P2P: Device Info underflow");
- return -1;
- }
- pos += msg->num_sec_dev_types * 8;
- if (data + len - pos < 4) {
- wpa_printf(MSG_DEBUG, "P2P: Invalid Device Name "
- "length %d", (int) (data + len - pos));
- return -1;
- }
- if (WPA_GET_BE16(pos) != ATTR_DEV_NAME) {
- wpa_hexdump(MSG_DEBUG, "P2P: Unexpected Device Name "
- "header", pos, 4);
- return -1;
- }
- pos += 2;
- nlen = WPA_GET_BE16(pos);
- pos += 2;
- if (data + len - pos < (int) nlen || nlen > 32) {
- wpa_printf(MSG_DEBUG, "P2P: Invalid Device Name "
- "length %d (buf len %d)", (int) nlen,
- (int) (data + len - pos));
- return -1;
- }
- os_memcpy(msg->device_name, pos, nlen);
- msg->device_name[nlen] = '\0';
- for (i = 0; i < nlen; i++) {
- if (msg->device_name[i] == '\0')
- break;
- if (msg->device_name[i] < 32)
- msg->device_name[i] = '_';
- }
- wpa_printf(MSG_DEBUG, "P2P: * Device Info: addr " MACSTR
- " primary device type %s device name '%s' "
- "config methods 0x%x",
- MAC2STR(msg->p2p_device_addr),
- wps_dev_type_bin2str(msg->pri_dev_type, devtype,
- sizeof(devtype)),
- msg->device_name, msg->config_methods);
- break;
- case P2P_ATTR_CONFIGURATION_TIMEOUT:
- if (len < 2) {
- wpa_printf(MSG_DEBUG, "P2P: Too short Configuration "
- "Timeout attribute (length %d)", len);
- return -1;
- }
- msg->config_timeout = data;
- wpa_printf(MSG_DEBUG, "P2P: * Configuration Timeout");
- break;
- case P2P_ATTR_INTENDED_INTERFACE_ADDR:
- if (len < ETH_ALEN) {
- wpa_printf(MSG_DEBUG, "P2P: Too short Intended P2P "
- "Interface Address attribute (length %d)",
- len);
- return -1;
- }
- msg->intended_addr = data;
- wpa_printf(MSG_DEBUG, "P2P: * Intended P2P Interface Address: "
- MACSTR, MAC2STR(msg->intended_addr));
- break;
- case P2P_ATTR_GROUP_BSSID:
- if (len < ETH_ALEN) {
- wpa_printf(MSG_DEBUG, "P2P: Too short P2P Group BSSID "
- "attribute (length %d)", len);
- return -1;
- }
- msg->group_bssid = data;
- wpa_printf(MSG_DEBUG, "P2P: * P2P Group BSSID: " MACSTR,
- MAC2STR(msg->group_bssid));
- break;
- case P2P_ATTR_GROUP_ID:
- if (len < ETH_ALEN || len > ETH_ALEN + 32) {
- wpa_printf(MSG_DEBUG, "P2P: Invalid P2P Group ID "
- "attribute length %d", len);
- return -1;
- }
- msg->group_id = data;
- msg->group_id_len = len;
- wpa_printf(MSG_DEBUG, "P2P: * P2P Group ID: Device Address "
- MACSTR, MAC2STR(msg->group_id));
- wpa_hexdump_ascii(MSG_DEBUG, "P2P: * P2P Group ID: SSID",
- msg->group_id + ETH_ALEN,
- msg->group_id_len - ETH_ALEN);
- break;
- case P2P_ATTR_INVITATION_FLAGS:
- if (len < 1) {
- wpa_printf(MSG_DEBUG, "P2P: Too short Invitation "
- "Flag attribute (length %d)", len);
- return -1;
- }
- msg->invitation_flags = data;
- wpa_printf(MSG_DEBUG, "P2P: * Invitation Flags: bitmap 0x%x",
- data[0]);
- break;
- case P2P_ATTR_MANAGEABILITY:
- if (len < 1) {
- wpa_printf(MSG_DEBUG, "P2P: Too short Manageability "
- "attribute (length %d)", len);
- return -1;
- }
- msg->manageability = data;
- wpa_printf(MSG_DEBUG, "P2P: * Manageability: bitmap 0x%x",
- data[0]);
- break;
- case P2P_ATTR_NOTICE_OF_ABSENCE:
- if (len < 2) {
- wpa_printf(MSG_DEBUG, "P2P: Too short Notice of "
- "Absence attribute (length %d)", len);
- return -1;
- }
- msg->noa = data;
- msg->noa_len = len;
- wpa_printf(MSG_DEBUG, "P2P: * Notice of Absence");
- break;
- case P2P_ATTR_EXT_LISTEN_TIMING:
- if (len < 4) {
- wpa_printf(MSG_DEBUG, "P2P: Too short Extended Listen "
- "Timing attribute (length %d)", len);
- return -1;
- }
- msg->ext_listen_timing = data;
- wpa_printf(MSG_DEBUG, "P2P: * Extended Listen Timing "
- "(period %u msec interval %u msec)",
- WPA_GET_LE16(msg->ext_listen_timing),
- WPA_GET_LE16(msg->ext_listen_timing + 2));
- break;
- case P2P_ATTR_MINOR_REASON_CODE:
- if (len < 1) {
- wpa_printf(MSG_DEBUG, "P2P: Too short Minor Reason "
- "Code attribute (length %d)", len);
- return -1;
- }
- msg->minor_reason_code = data;
- wpa_printf(MSG_DEBUG, "P2P: * Minor Reason Code: %u",
- *msg->minor_reason_code);
- break;
- default:
- wpa_printf(MSG_DEBUG, "P2P: Skipped unknown attribute %d "
- "(length %d)", id, len);
- break;
- }
-
- return 0;
-}
-
-
-/**
- * p2p_parse_p2p_ie - Parse P2P IE
- * @buf: Concatenated P2P IE(s) payload
- * @msg: Buffer for returning parsed attributes
- * Returns: 0 on success, -1 on failure
- *
- * Note: Caller is responsible for clearing the msg data structure before
- * calling this function.
- */
-int p2p_parse_p2p_ie(const struct wpabuf *buf, struct p2p_message *msg)
-{
- const u8 *pos = wpabuf_head_u8(buf);
- const u8 *end = pos + wpabuf_len(buf);
-
- wpa_printf(MSG_DEBUG, "P2P: Parsing P2P IE");
-
- while (pos < end) {
- u16 attr_len;
- if (pos + 2 >= end) {
- wpa_printf(MSG_DEBUG, "P2P: Invalid P2P attribute");
- return -1;
- }
- attr_len = WPA_GET_LE16(pos + 1);
- wpa_printf(MSG_DEBUG, "P2P: Attribute %d length %u",
- pos[0], attr_len);
- if (pos + 3 + attr_len > end) {
- wpa_printf(MSG_DEBUG, "P2P: Attribute underflow "
- "(len=%u left=%d)",
- attr_len, (int) (end - pos - 3));
- wpa_hexdump(MSG_MSGDUMP, "P2P: Data", pos, end - pos);
- return -1;
- }
- if (p2p_parse_attribute(pos[0], pos + 3, attr_len, msg))
- return -1;
- pos += 3 + attr_len;
- }
-
- return 0;
-}
-
-
-static int p2p_parse_wps_ie(const struct wpabuf *buf, struct p2p_message *msg)
-{
- struct wps_parse_attr attr;
-
- wpa_printf(MSG_DEBUG, "P2P: Parsing WPS IE");
- if (wps_parse_msg(buf, &attr))
- return -1;
- if (attr.dev_name && attr.dev_name_len < sizeof(msg->device_name) &&
- !msg->device_name[0])
- os_memcpy(msg->device_name, attr.dev_name, attr.dev_name_len);
- if (attr.config_methods) {
- msg->wps_config_methods =
- WPA_GET_BE16(attr.config_methods);
- wpa_printf(MSG_DEBUG, "P2P: Config Methods (WPS): 0x%x",
- msg->wps_config_methods);
- }
- if (attr.dev_password_id) {
- msg->dev_password_id = WPA_GET_BE16(attr.dev_password_id);
- wpa_printf(MSG_DEBUG, "P2P: Device Password ID: %d",
- msg->dev_password_id);
- }
- if (attr.primary_dev_type) {
- char devtype[WPS_DEV_TYPE_BUFSIZE];
- msg->wps_pri_dev_type = attr.primary_dev_type;
- wpa_printf(MSG_DEBUG, "P2P: Primary Device Type (WPS): %s",
- wps_dev_type_bin2str(msg->wps_pri_dev_type, devtype,
- sizeof(devtype)));
- }
-
- return 0;
-}
-
-
-/**
- * p2p_parse_ies - Parse P2P message IEs (both WPS and P2P IE)
- * @data: IEs from the message
- * @len: Length of data buffer in octets
- * @msg: Buffer for returning parsed attributes
- * Returns: 0 on success, -1 on failure
- *
- * Note: Caller is responsible for clearing the msg data structure before
- * calling this function.
- *
- * Note: Caller must free temporary memory allocations by calling
- * p2p_parse_free() when the parsed data is not needed anymore.
- */
-int p2p_parse_ies(const u8 *data, size_t len, struct p2p_message *msg)
-{
- struct ieee802_11_elems elems;
-
- ieee802_11_parse_elems(data, len, &elems, 0);
- if (elems.ds_params && elems.ds_params_len >= 1)
- msg->ds_params = elems.ds_params;
- if (elems.ssid)
- msg->ssid = elems.ssid - 2;
-
- msg->wps_attributes = ieee802_11_vendor_ie_concat(data, len,
- WPS_DEV_OUI_WFA);
- if (msg->wps_attributes &&
- p2p_parse_wps_ie(msg->wps_attributes, msg)) {
- p2p_parse_free(msg);
- return -1;
- }
-
- msg->p2p_attributes = ieee802_11_vendor_ie_concat(data, len,
- P2P_IE_VENDOR_TYPE);
- if (msg->p2p_attributes &&
- p2p_parse_p2p_ie(msg->p2p_attributes, msg)) {
- wpa_printf(MSG_DEBUG, "P2P: Failed to parse P2P IE data");
- if (msg->p2p_attributes)
- wpa_hexdump_buf(MSG_MSGDUMP, "P2P: P2P IE data",
- msg->p2p_attributes);
- p2p_parse_free(msg);
- return -1;
- }
-
- return 0;
-}
-
-
-/**
- * p2p_parse - Parse a P2P Action frame contents
- * @data: Action frame payload after Category and Code fields
- * @len: Length of data buffer in octets
- * @msg: Buffer for returning parsed attributes
- * Returns: 0 on success, -1 on failure
- *
- * Note: Caller must free temporary memory allocations by calling
- * p2p_parse_free() when the parsed data is not needed anymore.
- */
-int p2p_parse(const u8 *data, size_t len, struct p2p_message *msg)
-{
- os_memset(msg, 0, sizeof(*msg));
- wpa_printf(MSG_DEBUG, "P2P: Parsing the received message");
- if (len < 1) {
- wpa_printf(MSG_DEBUG, "P2P: No Dialog Token in the message");
- return -1;
- }
- msg->dialog_token = data[0];
- wpa_printf(MSG_DEBUG, "P2P: * Dialog Token: %d", msg->dialog_token);
-
- return p2p_parse_ies(data + 1, len - 1, msg);
-}
-
-
-/**
- * p2p_parse_free - Free temporary data from P2P parsing
- * @msg: Parsed attributes
- */
-void p2p_parse_free(struct p2p_message *msg)
-{
- wpabuf_free(msg->p2p_attributes);
- msg->p2p_attributes = NULL;
- wpabuf_free(msg->wps_attributes);
- msg->wps_attributes = NULL;
-}
-
-
-int p2p_group_info_parse(const u8 *gi, size_t gi_len,
- struct p2p_group_info *info)
-{
- const u8 *g, *gend;
-
- os_memset(info, 0, sizeof(*info));
- if (gi == NULL)
- return 0;
-
- g = gi;
- gend = gi + gi_len;
- while (g < gend) {
- struct p2p_client_info *cli;
- const u8 *t, *cend;
- int count;
-
- cli = &info->client[info->num_clients];
- cend = g + 1 + g[0];
- if (cend > gend)
- return -1; /* invalid data */
- /* g at start of P2P Client Info Descriptor */
- /* t at Device Capability Bitmap */
- t = g + 1 + 2 * ETH_ALEN;
- if (t > cend)
- return -1; /* invalid data */
- cli->p2p_device_addr = g + 1;
- cli->p2p_interface_addr = g + 1 + ETH_ALEN;
- cli->dev_capab = t[0];
-
- if (t + 1 + 2 + 8 + 1 > cend)
- return -1; /* invalid data */
-
- cli->config_methods = WPA_GET_BE16(&t[1]);
- cli->pri_dev_type = &t[3];
-
- t += 1 + 2 + 8;
- /* t at Number of Secondary Device Types */
- cli->num_sec_dev_types = *t++;
- if (t + 8 * cli->num_sec_dev_types > cend)
- return -1; /* invalid data */
- cli->sec_dev_types = t;
- t += 8 * cli->num_sec_dev_types;
-
- /* t at Device Name in WPS TLV format */
- if (t + 2 + 2 > cend)
- return -1; /* invalid data */
- if (WPA_GET_BE16(t) != ATTR_DEV_NAME)
- return -1; /* invalid Device Name TLV */
- t += 2;
- count = WPA_GET_BE16(t);
- t += 2;
- if (count > cend - t)
- return -1; /* invalid Device Name TLV */
- if (count >= 32)
- count = 32;
- cli->dev_name = (const char *) t;
- cli->dev_name_len = count;
-
- g = cend;
-
- info->num_clients++;
- if (info->num_clients == P2P_MAX_GROUP_ENTRIES)
- return -1;
- }
-
- return 0;
-}
-
-
-static int p2p_group_info_text(const u8 *gi, size_t gi_len, char *buf,
- char *end)
-{
- char *pos = buf;
- int ret;
- struct p2p_group_info info;
- unsigned int i;
-
- if (p2p_group_info_parse(gi, gi_len, &info) < 0)
- return 0;
-
- for (i = 0; i < info.num_clients; i++) {
- struct p2p_client_info *cli;
- char name[33];
- char devtype[WPS_DEV_TYPE_BUFSIZE];
- u8 s;
- int count;
-
- cli = &info.client[i];
- ret = os_snprintf(pos, end - pos, "p2p_group_client: "
- "dev=" MACSTR " iface=" MACSTR,
- MAC2STR(cli->p2p_device_addr),
- MAC2STR(cli->p2p_interface_addr));
- if (ret < 0 || ret >= end - pos)
- return pos - buf;
- pos += ret;
-
- ret = os_snprintf(pos, end - pos,
- " dev_capab=0x%x config_methods=0x%x "
- "dev_type=%s",
- cli->dev_capab, cli->config_methods,
- wps_dev_type_bin2str(cli->pri_dev_type,
- devtype,
- sizeof(devtype)));
- if (ret < 0 || ret >= end - pos)
- return pos - buf;
- pos += ret;
-
- for (s = 0; s < cli->num_sec_dev_types; s++) {
- ret = os_snprintf(pos, end - pos, " dev_type=%s",
- wps_dev_type_bin2str(
- &cli->sec_dev_types[s * 8],
- devtype, sizeof(devtype)));
- if (ret < 0 || ret >= end - pos)
- return pos - buf;
- pos += ret;
- }
-
- os_memcpy(name, cli->dev_name, cli->dev_name_len);
- name[cli->dev_name_len] = '\0';
- count = (int) cli->dev_name_len - 1;
- while (count >= 0) {
- if (name[count] < 32)
- name[count] = '_';
- count--;
- }
-
- ret = os_snprintf(pos, end - pos, " dev_name='%s'\n", name);
- if (ret < 0 || ret >= end - pos)
- return pos - buf;
- pos += ret;
- }
-
- return pos - buf;
-}
-
-
-/**
- * p2p_attr_text - Build text format description of P2P IE attributes
- * @data: P2P IE contents
- * @buf: Buffer for returning text
- * @end: Pointer to the end of the buf area
- * Returns: Number of octets written to the buffer or -1 on faikure
- *
- * This function can be used to parse P2P IE contents into text format
- * field=value lines.
- */
-int p2p_attr_text(struct wpabuf *data, char *buf, char *end)
-{
- struct p2p_message msg;
- char *pos = buf;
- int ret;
-
- os_memset(&msg, 0, sizeof(msg));
- if (p2p_parse_p2p_ie(data, &msg))
- return -1;
-
- if (msg.capability) {
- ret = os_snprintf(pos, end - pos,
- "p2p_dev_capab=0x%x\n"
- "p2p_group_capab=0x%x\n",
- msg.capability[0], msg.capability[1]);
- if (ret < 0 || ret >= end - pos)
- return pos - buf;
- pos += ret;
- }
-
- if (msg.pri_dev_type) {
- char devtype[WPS_DEV_TYPE_BUFSIZE];
- ret = os_snprintf(pos, end - pos,
- "p2p_primary_device_type=%s\n",
- wps_dev_type_bin2str(msg.pri_dev_type,
- devtype,
- sizeof(devtype)));
- if (ret < 0 || ret >= end - pos)
- return pos - buf;
- pos += ret;
- }
-
- ret = os_snprintf(pos, end - pos, "p2p_device_name=%s\n",
- msg.device_name);
- if (ret < 0 || ret >= end - pos)
- return pos - buf;
- pos += ret;
-
- if (msg.p2p_device_addr) {
- ret = os_snprintf(pos, end - pos, "p2p_device_addr=" MACSTR
- "\n",
- MAC2STR(msg.p2p_device_addr));
- if (ret < 0 || ret >= end - pos)
- return pos - buf;
- pos += ret;
- }
-
- ret = os_snprintf(pos, end - pos, "p2p_config_methods=0x%x\n",
- msg.config_methods);
- if (ret < 0 || ret >= end - pos)
- return pos - buf;
- pos += ret;
-
- ret = p2p_group_info_text(msg.group_info, msg.group_info_len,
- pos, end);
- if (ret < 0)
- return pos - buf;
- pos += ret;
-
- return pos - buf;
-}
-
-
-int p2p_get_cross_connect_disallowed(const struct wpabuf *p2p_ie)
-{
- struct p2p_message msg;
-
- os_memset(&msg, 0, sizeof(msg));
- if (p2p_parse_p2p_ie(p2p_ie, &msg))
- return 0;
-
- if (!msg.manageability)
- return 0;
-
- return !(msg.manageability[0] & P2P_MAN_CROSS_CONNECTION_PERMITTED);
-}
-
-
-u8 p2p_get_group_capab(const struct wpabuf *p2p_ie)
-{
- struct p2p_message msg;
-
- os_memset(&msg, 0, sizeof(msg));
- if (p2p_parse_p2p_ie(p2p_ie, &msg))
- return 0;
-
- if (!msg.capability)
- return 0;
-
- return msg.capability[1];
-}
-
-
-const u8 * p2p_get_go_dev_addr(const struct wpabuf *p2p_ie)
-{
- struct p2p_message msg;
-
- os_memset(&msg, 0, sizeof(msg));
- if (p2p_parse_p2p_ie(p2p_ie, &msg))
- return NULL;
-
- if (msg.p2p_device_addr)
- return msg.p2p_device_addr;
- if (msg.device_id)
- return msg.device_id;
-
- return NULL;
-}
projects / mech_eap.git / blobdiff