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iwd/src/p2putil.h
Andrew Zaborowski 116b36e943 p2putil: Add p2p_get_random_string 
Add a utility to select random characters from the set defined in P2P
v1.7 Section 3.2.1.  In this version the assumption is that we're only
actually using this for the two SSID characters.
2020-09-14 11:39:25 -05:00

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/*
*
* Wireless daemon for Linux
*
* Copyright (C) 2019 Intel Corporation. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <stdint.h>
#include "src/wscutil.h"
struct l_queue;
/* Wi-Fi P2P Technical Specification v1.7, Section 4.1.1, Table 6 */
enum p2p_attr {
P2P_ATTR_STATUS = 0,
P2P_ATTR_MINOR_REASON_CODE = 1,
P2P_ATTR_P2P_CAPABILITY = 2,
P2P_ATTR_P2P_DEVICE_ID = 3,
P2P_ATTR_GO_INTENT = 4,
P2P_ATTR_CONFIGURATION_TIMEOUT = 5,
P2P_ATTR_LISTEN_CHANNEL = 6,
P2P_ATTR_P2P_GROUP_BSSID = 7,
P2P_ATTR_EXTENDED_LISTEN_TIMING = 8,
P2P_ATTR_INTENDED_P2P_INTERFACE_ADDR = 9,
P2P_ATTR_P2P_MANAGEABILITY = 10,
P2P_ATTR_CHANNEL_LIST = 11,
P2P_ATTR_NOTICE_OF_ABSENCE = 12,
P2P_ATTR_P2P_DEVICE_INFO = 13,
P2P_ATTR_P2P_GROUP_INFO = 14,
P2P_ATTR_P2P_GROUP_ID = 15,
P2P_ATTR_P2P_INTERFACE = 16,
P2P_ATTR_OPERATING_CHANNEL = 17,
P2P_ATTR_INVITATION_FLAGS = 18,
P2P_ATTR_OOB_GO_NEGOTIATION_CHANNEL = 19,
P2P_ATTR_SVC_HASH = 21,
P2P_ATTR_SESSION_INFO_DATA_INFO = 22,
P2P_ATTR_CONNECTION_CAPABILITY_INFO = 23,
P2P_ATTR_ADVERTISEMENT_ID_INFO = 24,
P2P_ATTR_ADVERTISED_SVC_INFO = 25,
P2P_ATTR_SESSION_ID_INFO = 26,
P2P_ATTR_FEATURE_CAPABILITY = 27,
P2P_ATTR_PERSISTENT_GROUP_INFO = 28,
P2P_ATTR_VENDOR_SPECIFIC_ATTR = 221,
};
/* Table 8 */
enum p2p_attr_status_code {
P2P_STATUS_SUCCESS = 0,
P2P_STATUS_FAIL_INFO_NOT_AVAIL = 1,
P2P_STATUS_FAIL_INCOMPATIBLE_PARAMS = 2,
P2P_STATUS_FAIL_LIMIT_REACHED = 3,
P2P_STATUS_FAIL_INVALID_PARAMS = 4,
P2P_STATUS_FAIL_UNABLE_TO_ACCOMMODATE_REQUEST = 5,
P2P_STATUS_FAIL_PREV_PROTOCOL_ERROR = 6,
P2P_STATUS_FAIL_NO_COMMON_CHANNELS = 7,
P2P_STATUS_FAIL_UNKNOWN_P2P_GROUP = 8,
P2P_STATUS_FAIL_INTENT_15_IN_GO_NEGOTIATION = 9,
P2P_STATUS_FAIL_INCOMPATIBLE_PROVISIONING = 10,
P2P_STATUS_FAIL_REJECTED_BY_USER = 11,
P2P_STATUS_SUCCESS_ACCEPTED_BY_USER = 12,
};
/* Table 12 */
enum p2p_device_capability_bitmap {
P2P_DEVICE_CAP_SVC_DISCOVERY = 0x01,
P2P_DEVICE_CAP_CLIENT_DISCOVERABILITY = 0x02,
P2P_DEVICE_CAP_CONCURRENT_OP = 0x04,
P2P_DEVICE_CAP_INFRASTRUCTURE_MANAGED = 0x08,
P2P_DEVICE_CAP_DEVICE_LIMIT = 0x10,
P2P_DEVICE_CAP_INVITATION_PROCEDURE = 0x20,
};
/* Table 13 */
enum p2p_group_capability_bitmap {
P2P_GROUP_CAP_GO = 0x01,
P2P_GROUP_CAP_PERSISTENT_GROUP = 0x02,
P2P_GROUP_CAP_GROUP_LIMIT = 0x04,
P2P_GROUP_CAP_INTRA_BSS_DISTRIBUTION = 0x08,
P2P_GROUP_CAP_CROSS_CONNECT = 0x10,
P2P_GROUP_CAP_PERSISTENT_RECONNECT = 0x20,
P2P_GROUP_CAP_GROUP_FORMATION = 0x40,
P2P_GROUP_CAP_IP_ALLOCATION = 0x80,
};
/* Table 23 */
enum p2p_manageability_bitmap {
P2P_MANAGEABILITY_DEVICE_MGMT = 0x01,
P2P_MANAGEABILITY_CROSS_CONNECT = 0x02,
P2P_MANAGEABILITY_COEXIST_OPTIONAL = 0x04,
};
/* Table 61 */
enum p2p_public_action_frame_type {
P2P_ACTION_GO_NEGOTIATION_REQ = 0,
P2P_ACTION_GO_NEGOTIATION_RESP = 1,
P2P_ACTION_GO_NEGOTIATION_CONFIRM = 2,
P2P_ACTION_INVITATION_REQ = 3,
P2P_ACTION_INVITATION_RESP = 4,
P2P_ACTION_DEVICE_DISCOVERABILITY_REQ = 5,
P2P_ACTION_DEVICE_DISCOVERABILITY_RESP = 6,
P2P_ACTION_PROVISION_DISCOVERY_REQ = 7,
P2P_ACTION_PROVISION_DISCOVERY_RESP = 8,
};
/* Table 75 */
enum p2p_action_frame_type {
P2P_ACTION_NOTICE_OF_ABSENCE = 0,
P2P_ACTION_PRESENCE_REQ = 1,
P2P_ACTION_PRESENCE_RESP = 2,
P2P_ACTION_GO_DISCOVERABILITY_REQ = 3,
};
struct p2p_attr_iter {
const uint8_t *pos;
const uint8_t *end;
enum p2p_attr type;
size_t len;
};
void p2p_attr_iter_init(struct p2p_attr_iter *iter, const uint8_t *pdu,
size_t len);
bool p2p_attr_iter_next(struct p2p_attr_iter *iter);
static inline enum p2p_attr p2p_attr_iter_get_type(struct p2p_attr_iter *iter)
{
return iter->type;
}
static inline size_t p2p_attr_iter_get_length(struct p2p_attr_iter *iter)
{
return iter->len;
}
static inline const uint8_t *p2p_attr_iter_get_data(struct p2p_attr_iter *iter)
{
return iter->pos + 3;
}
/* Wi-Fi Display Technical Specification v2.1.0 Table 27 */
enum wfd_subelem_type {
WFD_SUBELEM_WFD_DEVICE_INFORMATION = 0,
WFD_SUBELEM_ASSOCIATED_BSSID = 1,
WFD_SUBELEM_COUPLED_SINK_INFORMATION = 6,
WFD_SUBELEM_EXTENDED_CAPABILITY = 7,
WFD_SUBELEM_LOCAL_IP_ADDRESS = 8,
WFD_SUBELEM_SESION_INFORMATION = 9,
WFD_SUBELEM_ALTERNATIVE_MAC_ADDRESS = 10,
WFD_SUBELEM_R2_DEVICE_INFORMATION = 11,
};
enum wfd_dev_info_bits {
WFD_DEV_INFO_DEVICE_TYPE = 0x0003,
WFD_DEV_INFO_COUPLED_SINK_AT_SOURCE_OK = 0x0004,
WFD_DEV_INFO_COUPLED_SINK_AT_SINK_OK = 0x0008,
WFD_DEV_INFO_SESSION_AVAILABILITY = 0x0030,
WFD_DEV_INFO_SERVICE_DISCOVERY_SUPPORT = 0x0040,
WFD_DEV_INFO_PREFER_TDLS_CONNECTIVITY = 0x0080,
WFD_DEV_INFO_CONTENT_PROTECTION_SUPPORT = 0x0100,
WFD_DEV_INFO_8021AS_TIME_SYNC_SUPPORT = 0x0200,
WFD_DEV_INFO_NO_AUDIO_AT_PRIMARY_SINK = 0x0400,
WFD_DEV_INFO_AUDIO_ONLY_AT_SOURCE = 0x0800,
WFD_DEV_INFO_TDLS_PERSISTENT_GROUP = 0x1000,
WFD_DEV_INFO_REINVOKE_TDLS_GROUP = 0x2000,
};
enum wfd_dev_info_type {
WFD_DEV_INFO_TYPE_SOURCE = 0x0000,
WFD_DEV_INFO_TYPE_PRIMARY_SINK = 0x0001,
WFD_DEV_INFO_TYPE_SECONDARY_SINK = 0x0002,
WFD_DEV_INFO_TYPE_DUAL_ROLE = 0x0003,
};
enum wfd_dev_info_session_availability {
WFD_DEV_INFO_SESSION_NOT_AVAILABLE = 0x0000,
WFD_DEV_INFO_SESSION_AVAILABLE = 0x0010,
};
struct wfd_subelem_iter {
const uint8_t *pos;
const uint8_t *end;
enum wfd_subelem_type type;
size_t len;
};
void wfd_subelem_iter_init(struct wfd_subelem_iter *iter, const uint8_t *pdu,
size_t len);
bool wfd_subelem_iter_next(struct wfd_subelem_iter *iter);
static inline enum wfd_subelem_type wfd_subelem_iter_get_type(
struct wfd_subelem_iter *iter)
{
return iter->type;
}
static inline size_t wfd_subelem_iter_get_length(struct wfd_subelem_iter *iter)
{
return iter->len;
}
static inline const uint8_t *wfd_subelem_iter_get_data(
struct wfd_subelem_iter *iter)
{
return iter->pos + 3;
}
struct p2p_capability_attr {
uint8_t device_caps;
uint8_t group_caps;
};
struct p2p_config_timeout_attr {
uint8_t go_config_timeout;
uint8_t client_config_timeout;
};
struct p2p_channel_attr {
char country[3];
uint8_t oper_class;
uint8_t channel_num;
};
struct p2p_extended_listen_timing_attr {
uint16_t avail_period_ms;
uint16_t avail_interval_ms;
};
struct p2p_channel_entries {
uint8_t oper_class;
int n_channels;
uint8_t channels[];
};
struct p2p_channel_list_attr {
char country[3];
struct l_queue *channel_entries;
};
struct p2p_notice_of_absence_desc {
uint8_t count_type;
uint32_t duration;
uint32_t interval;
uint32_t start_time;
};
struct p2p_notice_of_absence_attr {
uint8_t index;
bool opp_ps;
uint8_t ct_window;
struct l_queue *descriptors;
};
struct p2p_device_info_attr {
uint8_t device_addr[6];
uint16_t wsc_config_methods;
struct wsc_primary_device_type primary_device_type;
struct l_queue *secondary_device_types;
char device_name[33];
};
struct p2p_client_info_descriptor {
uint8_t device_addr[6];
uint8_t interface_addr[6];
uint8_t device_caps;
uint16_t wsc_config_methods;
struct wsc_primary_device_type primary_device_type;
struct l_queue *secondary_device_types;
char device_name[33];
};
struct p2p_group_id_attr {
uint8_t device_addr[6];
char ssid[33];
};
struct p2p_interface_attr {
uint8_t device_addr[6];
struct l_queue *interface_addrs;
};
struct p2p_session_info_data_attr {
size_t data_len;
uint8_t data[144];
};
struct p2p_advertisement_id_info_attr {
uint32_t advertisement_id;
uint8_t service_mac_addr[6];
};
struct p2p_advertised_service_descriptor {
uint32_t advertisement_id;
uint16_t wsc_config_methods;
char *service_name;
};
struct p2p_session_id_info_attr {
uint32_t session_id;
uint8_t session_mac_addr[6];
};
enum p2p_asp_coordination_transport_protocol {
P2P_ASP_TRANSPORT_UNKNOWN = 0,
P2P_ASP_TRANSPORT_UDP,
};
struct p2p_beacon {
struct p2p_capability_attr capability;
uint8_t device_addr[6];
struct p2p_notice_of_absence_attr notice_of_absence;
};
struct p2p_probe_req {
struct p2p_capability_attr capability;
uint8_t device_addr[6];
struct p2p_channel_attr listen_channel;
struct p2p_extended_listen_timing_attr listen_availability;
struct p2p_device_info_attr device_info;
struct p2p_channel_attr operating_channel;
struct l_queue *service_hashes;
};
struct p2p_probe_resp {
struct p2p_capability_attr capability;
struct p2p_extended_listen_timing_attr listen_availability;
struct p2p_notice_of_absence_attr notice_of_absence;
struct p2p_device_info_attr device_info;
struct l_queue *group_clients;
struct l_queue *advertised_svcs;
};
struct p2p_association_req {
struct p2p_capability_attr capability;
struct p2p_extended_listen_timing_attr listen_availability;
struct p2p_device_info_attr device_info;
struct p2p_interface_attr interface;
};
struct p2p_association_resp {
enum p2p_attr_status_code status;
struct p2p_extended_listen_timing_attr listen_availability;
};
struct p2p_deauthentication {
uint8_t minor_reason_code;
};
struct p2p_disassociation {
uint8_t minor_reason_code;
};
struct p2p_go_negotiation_req {
uint8_t dialog_token;
struct p2p_capability_attr capability;
uint8_t go_intent;
bool go_tie_breaker;
struct p2p_config_timeout_attr config_timeout;
struct p2p_channel_attr listen_channel;
struct p2p_extended_listen_timing_attr listen_availability;
uint8_t intended_interface_addr[6];
struct p2p_channel_list_attr channel_list;
struct p2p_device_info_attr device_info;
struct p2p_channel_attr operating_channel;
enum wsc_device_password_id device_password_id;
uint8_t *wfd;
ssize_t wfd_size;
};
struct p2p_go_negotiation_resp {
uint8_t dialog_token;
enum p2p_attr_status_code status;
struct p2p_capability_attr capability;
uint8_t go_intent;
bool go_tie_breaker;
struct p2p_config_timeout_attr config_timeout;
struct p2p_channel_attr operating_channel;
uint8_t intended_interface_addr[6];
struct p2p_channel_list_attr channel_list;
struct p2p_device_info_attr device_info;
struct p2p_group_id_attr group_id;
enum wsc_device_password_id device_password_id;
uint8_t *wfd;
ssize_t wfd_size;
};
struct p2p_go_negotiation_confirmation {
uint8_t dialog_token;
enum p2p_attr_status_code status;
struct p2p_capability_attr capability;
struct p2p_channel_attr operating_channel;
struct p2p_channel_list_attr channel_list;
struct p2p_group_id_attr group_id;
uint8_t *wfd;
ssize_t wfd_size;
};
struct p2p_invitation_req {
uint8_t dialog_token;
struct p2p_config_timeout_attr config_timeout;
bool reinvoke_persistent_group;
struct p2p_channel_attr operating_channel;
uint8_t group_bssid[6];
struct p2p_channel_list_attr channel_list;
struct p2p_group_id_attr group_id;
struct p2p_device_info_attr device_info;
enum wsc_device_password_id device_password_id;
uint8_t *wfd;
ssize_t wfd_size;
};
struct p2p_invitation_resp {
uint8_t dialog_token;
enum p2p_attr_status_code status;
struct p2p_config_timeout_attr config_timeout;
struct p2p_channel_attr operating_channel;
uint8_t group_bssid[6];
struct p2p_channel_list_attr channel_list;
uint8_t *wfd;
ssize_t wfd_size;
};
struct p2p_device_discoverability_req {
uint8_t dialog_token;
uint8_t device_addr[6];
struct p2p_group_id_attr group_id;
};
struct p2p_device_discoverability_resp {
uint8_t dialog_token;
enum p2p_attr_status_code status;
};
struct p2p_provision_discovery_req {
uint8_t dialog_token;
struct p2p_capability_attr capability;
struct p2p_device_info_attr device_info;
struct p2p_group_id_attr group_id;
uint8_t intended_interface_addr[6];
enum p2p_attr_status_code status;
struct p2p_channel_attr operating_channel;
struct p2p_channel_list_attr channel_list;
struct p2p_session_info_data_attr session_info;
uint8_t connection_capability;
struct p2p_advertisement_id_info_attr advertisement_id;
struct p2p_config_timeout_attr config_timeout;
struct p2p_channel_attr listen_channel;
struct p2p_session_id_info_attr session_id;
enum p2p_asp_coordination_transport_protocol transport_protocol;
struct p2p_group_id_attr persistent_group_info;
uint16_t wsc_config_method;
uint8_t *wfd;
ssize_t wfd_size;
};
struct p2p_provision_discovery_resp {
uint8_t dialog_token;
enum p2p_attr_status_code status;
struct p2p_capability_attr capability;
struct p2p_device_info_attr device_info;
struct p2p_group_id_attr group_id;
uint8_t intended_interface_addr[6];
struct p2p_channel_attr operating_channel;
struct p2p_channel_list_attr channel_list;
uint8_t connection_capability;
struct p2p_advertisement_id_info_attr advertisement_id;
struct p2p_config_timeout_attr config_timeout;
struct p2p_session_id_info_attr session_id;
enum p2p_asp_coordination_transport_protocol transport_protocol;
struct p2p_group_id_attr persistent_group_info;
struct p2p_session_info_data_attr session_info;
uint16_t wsc_config_method;
uint8_t *wfd;
ssize_t wfd_size;
};
struct p2p_notice_of_absence {
struct p2p_notice_of_absence_attr notice_of_absence;
};
struct p2p_presence_req {
uint8_t dialog_token;
struct p2p_notice_of_absence_attr notice_of_absence;
};
struct p2p_presence_resp {
uint8_t dialog_token;
enum p2p_attr_status_code status;
struct p2p_notice_of_absence_attr notice_of_absence;
};
int p2p_parse_beacon(const uint8_t *pdu, size_t len,
struct p2p_beacon *out);
int p2p_parse_probe_req(const uint8_t *pdu, size_t len,
struct p2p_probe_req *out);
int p2p_parse_probe_resp(const uint8_t *pdu, size_t len,
struct p2p_probe_resp *out);
int p2p_parse_association_req(const uint8_t *pdu, size_t len,
struct p2p_association_req *out);
int p2p_parse_association_resp(const uint8_t *pdu, size_t len,
struct p2p_association_resp *out);
int p2p_parse_deauthentication(const uint8_t *pdu, size_t len,
struct p2p_deauthentication *out);
int p2p_parse_disassociation(const uint8_t *pdu, size_t len,
struct p2p_disassociation *out);
int p2p_parse_go_negotiation_req(const uint8_t *pdu, size_t len,
struct p2p_go_negotiation_req *out);
int p2p_parse_go_negotiation_resp(const uint8_t *pdu, size_t len,
struct p2p_go_negotiation_resp *out);
int p2p_parse_go_negotiation_confirmation(const uint8_t *pdu, size_t len,
struct p2p_go_negotiation_confirmation *out);
int p2p_parse_invitation_req(const uint8_t *pdu, size_t len,
struct p2p_invitation_req *out);
int p2p_parse_invitation_resp(const uint8_t *pdu, size_t len,
struct p2p_invitation_resp *out);
int p2p_parse_device_disc_req(const uint8_t *pdu, size_t len,
struct p2p_device_discoverability_req *out);
int p2p_parse_device_disc_resp(const uint8_t *pdu, size_t len,
struct p2p_device_discoverability_resp *out);
int p2p_parse_provision_disc_req(const uint8_t *pdu, size_t len,
struct p2p_provision_discovery_req *out);
int p2p_parse_provision_disc_resp(const uint8_t *pdu, size_t len,
struct p2p_provision_discovery_resp *out);
int p2p_parse_notice_of_absence(const uint8_t *pdu, size_t len,
struct p2p_notice_of_absence *out);
int p2p_parse_presence_req(const uint8_t *pdu, size_t len,
struct p2p_presence_req *out);
int p2p_parse_presence_resp(const uint8_t *pdu, size_t len,
struct p2p_presence_resp *out);
int p2p_parse_go_disc_req(const uint8_t *pdu, size_t len);
void p2p_clear_beacon(struct p2p_beacon *data);
void p2p_clear_probe_req(struct p2p_probe_req *data);
void p2p_clear_probe_resp(struct p2p_probe_resp *data);
void p2p_clear_association_req(struct p2p_association_req *data);
void p2p_clear_association_resp(struct p2p_association_resp *data);
void p2p_clear_go_negotiation_req(struct p2p_go_negotiation_req *data);
void p2p_clear_go_negotiation_resp(struct p2p_go_negotiation_resp *data);
void p2p_clear_go_negotiation_confirmation(
struct p2p_go_negotiation_confirmation *data);
void p2p_clear_invitation_req(struct p2p_invitation_req *data);
void p2p_clear_invitation_resp(struct p2p_invitation_resp *data);
void p2p_clear_provision_disc_req(struct p2p_provision_discovery_req *data);
void p2p_clear_provision_disc_resp(struct p2p_provision_discovery_resp *data);
void p2p_clear_notice_of_absence(struct p2p_notice_of_absence *data);
void p2p_clear_presence_req(struct p2p_presence_req *data);
void p2p_clear_presence_resp(struct p2p_presence_resp *data);
uint8_t *p2p_build_beacon(const struct p2p_beacon *data, size_t *out_len);
uint8_t *p2p_build_probe_req(const struct p2p_probe_req *data, size_t *out_len);
uint8_t *p2p_build_probe_resp(const struct p2p_probe_resp *data,
size_t *out_len);
uint8_t *p2p_build_association_req(const struct p2p_association_req *data,
size_t *out_len);
uint8_t *p2p_build_association_resp(const struct p2p_association_resp *data,
size_t *out_len);
uint8_t *p2p_build_deauthentication(const struct p2p_deauthentication *data,
size_t *out_len);
uint8_t *p2p_build_disassociation(const struct p2p_disassociation *data,
size_t *out_len);
uint8_t *p2p_build_go_negotiation_req(const struct p2p_go_negotiation_req *data,
size_t *out_len);
uint8_t *p2p_build_go_negotiation_resp(
const struct p2p_go_negotiation_resp *data,
size_t *out_len);
uint8_t *p2p_build_go_negotiation_confirmation(
const struct p2p_go_negotiation_confirmation *data,
size_t *out_len);
uint8_t *p2p_build_invitation_req(const struct p2p_invitation_req *data,
size_t *out_len);
uint8_t *p2p_build_invitation_resp(const struct p2p_invitation_resp *data,
size_t *out_len);
uint8_t *p2p_build_device_disc_req(
const struct p2p_device_discoverability_req *data,
size_t *out_len);
uint8_t *p2p_build_device_disc_resp(
const struct p2p_device_discoverability_resp *data,
size_t *out_len);
uint8_t *p2p_build_provision_disc_req(
const struct p2p_provision_discovery_req *data,
size_t *out_len);
uint8_t *p2p_build_provision_disc_resp(
const struct p2p_provision_discovery_resp *data,
size_t *out_len);
uint8_t *p2p_build_notice_of_absence(const struct p2p_notice_of_absence *data,
size_t *out_len);
uint8_t *p2p_build_presence_req(const struct p2p_presence_req *data,
size_t *out_len);
uint8_t *p2p_build_presence_resp(const struct p2p_presence_resp *data,
size_t *out_len);
uint8_t *p2p_build_go_disc_req(size_t *out_len);
void p2p_get_random_string(char *buf, size_t len);
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