darlinghq/darling-xnu
1
0
Fork 0
mirror of https://github.com/darlinghq/darling-xnu.git synced 2024-11-23 04:29:53 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity
main
darling-xnu/bsd/net/necp.h
Thomas A cdbc10b677 Upload xnu-7195.141.2 Source
2023-05-16 21:41:14 -07:00

1320 lines
71 KiB
C
Raw Permalink Blame History

/*
* Copyright (c) 2013-2021 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
#ifndef _NET_NECP_H_
#define _NET_NECP_H_
#include <net/net_kev.h>
#ifdef PRIVATE
#include <netinet/in.h>
#include <netinet/in_stat.h>
#include <sys/socket.h>
#include <net/if.h>
/*
* Name registered by the NECP
*/
#define NECP_CONTROL_NAME "com.apple.net.necp_control"
#define NECP_TLV_LENGTH_UINT32 1
struct necp_packet_header {
u_int8_t packet_type;
u_int8_t flags;
u_int32_t message_id;
};
/*
* Control message commands
*/
#define NECP_PACKET_TYPE_POLICY_ADD 1
#define NECP_PACKET_TYPE_POLICY_GET 2
#define NECP_PACKET_TYPE_POLICY_DELETE 3
#define NECP_PACKET_TYPE_POLICY_APPLY_ALL 4
#define NECP_PACKET_TYPE_POLICY_LIST_ALL 5
#define NECP_PACKET_TYPE_POLICY_DELETE_ALL 6
#define NECP_PACKET_TYPE_SET_SESSION_PRIORITY 7
#define NECP_PACKET_TYPE_LOCK_SESSION_TO_PROC 8
#define NECP_PACKET_TYPE_REGISTER_SERVICE 9
#define NECP_PACKET_TYPE_UNREGISTER_SERVICE 10
#define NECP_PACKET_TYPE_POLICY_DUMP_ALL 11
/*
* Session actions
*/
#define NECP_SESSION_ACTION_POLICY_ADD 1 // In: Policy TLVs Out: necp_policy_id
#define NECP_SESSION_ACTION_POLICY_GET 2 // In: necp_policy_id Out: Policy TLVs
#define NECP_SESSION_ACTION_POLICY_DELETE 3 // In: necp_policy_id Out: None
#define NECP_SESSION_ACTION_POLICY_APPLY_ALL 4 // In: None Out: None
#define NECP_SESSION_ACTION_POLICY_LIST_ALL 5 // In: None Out: TLVs of IDs
#define NECP_SESSION_ACTION_POLICY_DELETE_ALL 6 // In: None Out: None
#define NECP_SESSION_ACTION_SET_SESSION_PRIORITY 7 // In: necp_session_priority Out: None
#define NECP_SESSION_ACTION_LOCK_SESSION_TO_PROC 8 // In: None Out: None
#define NECP_SESSION_ACTION_REGISTER_SERVICE 9 // In: uuid_t Out: None
#define NECP_SESSION_ACTION_UNREGISTER_SERVICE 10 // In: uuid_t Out: None
#define NECP_SESSION_ACTION_POLICY_DUMP_ALL 11 // In: None Out: uint32_t bytes length, then Policy TLVs
/*
* Control message flags
*/
#define NECP_PACKET_FLAGS_RESPONSE 0x01 // Used for acks, errors, and query responses
/*
* Control message TLV types
*/
#define NECP_TLV_NIL 0
#define NECP_TLV_ERROR 1 // u_int32_t
#define NECP_TLV_POLICY_ORDER 2 // u_int32_t
#define NECP_TLV_POLICY_CONDITION 3
#define NECP_TLV_POLICY_RESULT 4
#define NECP_TLV_POLICY_ID 5 // u_int32_t
#define NECP_TLV_SESSION_PRIORITY 6 // u_int32_t
#define NECP_TLV_ATTRIBUTE_DOMAIN 7 // char[]
#define NECP_TLV_ATTRIBUTE_ACCOUNT 8 // char[]
#define NECP_TLV_SERVICE_UUID 9 // uuid_t
#define NECP_TLV_ROUTE_RULE 10
/*
* Control message TLV sent only by the kernel to userspace
*/
#define NECP_TLV_POLICY_OWNER 100 // char []
#define NECP_TLV_POLICY_DUMP 101
#define NECP_TLV_POLICY_RESULT_STRING 102 // char []
#define NECP_TLV_POLICY_SESSION_ORDER 103 // u_int32_t
/*
* Condition flags
*/
#define NECP_POLICY_CONDITION_FLAGS_NEGATIVE 0x01 // Negative
/*
* Conditions
* Used for setting policies as well as passing parameters to necp_match_policy.
*/
#define NECP_POLICY_CONDITION_DEFAULT 0 // N/A, not valid with any other conditions
// Socket/Application conditions
#define NECP_POLICY_CONDITION_APPLICATION 1 // uuid_t, uses effective UUID when possible
#define NECP_POLICY_CONDITION_REAL_APPLICATION 2 // uuid_t, never uses effective UUID. Only valid with NECP_POLICY_CONDITION_APPLICATION
#define NECP_POLICY_CONDITION_DOMAIN 3 // String, such as apple.com
#define NECP_POLICY_CONDITION_ACCOUNT 4 // String
#define NECP_POLICY_CONDITION_ENTITLEMENT 5 // String
#define NECP_POLICY_CONDITION_PID 6 // pid_t
#define NECP_POLICY_CONDITION_UID 7 // uid_t
#define NECP_POLICY_CONDITION_ALL_INTERFACES 8 // N/A
#define NECP_POLICY_CONDITION_BOUND_INTERFACE 9 // String
#define NECP_POLICY_CONDITION_TRAFFIC_CLASS 10 // necp_policy_condition_tc_range
// Socket/IP conditions
#define NECP_POLICY_CONDITION_IP_PROTOCOL 11 // u_int16_t
#define NECP_POLICY_CONDITION_LOCAL_ADDR 12 // necp_policy_condition_addr
#define NECP_POLICY_CONDITION_REMOTE_ADDR 13 // necp_policy_condition_addr
#define NECP_POLICY_CONDITION_LOCAL_ADDR_RANGE 14 // necp_policy_condition_addr_range
#define NECP_POLICY_CONDITION_REMOTE_ADDR_RANGE 15 // necp_policy_condition_addr_range
#define NECP_POLICY_CONDITION_AGENT_TYPE 16 // struct necp_policy_condition_agent_type
#define NECP_POLICY_CONDITION_HAS_CLIENT 17 // N/A
#define NECP_POLICY_CONDITION_LOCAL_NETWORKS 18 // Matches all local networks
// Socket-only conditions
#define NECP_POLICY_CONDITION_FLOW_IP_PROTOCOL 19 // u_int16_t
#define NECP_POLICY_CONDITION_FLOW_LOCAL_ADDR 20 // necp_policy_condition_addr
#define NECP_POLICY_CONDITION_FLOW_REMOTE_ADDR 21 // necp_policy_condition_addr
#define NECP_POLICY_CONDITION_FLOW_LOCAL_ADDR_RANGE 22 // necp_policy_condition_addr_range
#define NECP_POLICY_CONDITION_FLOW_REMOTE_ADDR_RANGE 23 // necp_policy_condition_addr_range
#define NECP_POLICY_CONDITION_FLOW_IS_LOOPBACK 31 // N/A
// Socket/Application conditions, continued
#define NECP_POLICY_CONDITION_CLIENT_FLAGS 24 // u_int32_t, values from NECP_CLIENT_PARAMETER_FLAG_*
#define NECP_POLICY_CONDITION_FLOW_LOCAL_ADDR_EMPTY 25 // N/A
#define NECP_POLICY_CONDITION_FLOW_REMOTE_ADDR_EMPTY 26 // N/A
#define NECP_POLICY_CONDITION_PLATFORM_BINARY 27 // N/A
#define NECP_POLICY_CONDITION_SDK_VERSION 28 // struct necp_policy_condition_sdk_version
#define NECP_POLICY_CONDITION_SIGNING_IDENTIFIER 29 // String
#define NECP_POLICY_CONDITION_PACKET_FILTER_TAGS 30 // u_int16_t
#define NECP_POLICY_CONDITION_DELEGATE_IS_PLATFORM_BINARY 32 // N/A
/*
* Policy Packet tags
*/
#define NECP_POLICY_CONDITION_PACKET_FILTER_TAG_STACK_DROP 0x01
#define NECP_POLICY_CONDITION_PACKET_FILTER_TAG_MAX NECP_POLICY_CONDITION_PACKET_FILTER_TAG_STACK_DROP
/*
* Results
*/
#define NECP_POLICY_RESULT_PASS 1 // N/A
#define NECP_POLICY_RESULT_SKIP 2 // u_int32_t, policy order to skip to. 0 to skip all session policies.
#define NECP_POLICY_RESULT_DROP 3 // N/A
#define NECP_POLICY_RESULT_SOCKET_DIVERT 4 // u_int32_t, flow divert control unit
#define NECP_POLICY_RESULT_SOCKET_FILTER 5 // u_int32_t, filter control unit
#define NECP_POLICY_RESULT_IP_TUNNEL 6 // String, interface name
#define NECP_POLICY_RESULT_IP_FILTER 7 // ?
#define NECP_POLICY_RESULT_TRIGGER 8 // service uuid_t
#define NECP_POLICY_RESULT_TRIGGER_IF_NEEDED 9 // service uuid_t
#define NECP_POLICY_RESULT_TRIGGER_SCOPED 10 // service uuid_t
#define NECP_POLICY_RESULT_NO_TRIGGER_SCOPED 11 // service uuid_t
#define NECP_POLICY_RESULT_SOCKET_SCOPED 12 // String, interface name
#define NECP_POLICY_RESULT_ROUTE_RULES 13 // N/A, must have route rules defined
#define NECP_POLICY_RESULT_USE_NETAGENT 14 // netagent uuid_t
#define NECP_POLICY_RESULT_NETAGENT_SCOPED 15 // netagent uuid_t
#define NECP_POLICY_RESULT_SCOPED_DIRECT 16 // N/A, scopes to primary physical interface
#define NECP_POLICY_RESULT_ALLOW_UNENTITLED 17 // N/A
#define NECP_POLICY_RESULT_MAX NECP_POLICY_RESULT_ALLOW_UNENTITLED
/*
* PASS Result Flags
*/
#define NECP_POLICY_PASS_NO_SKIP_IPSEC 0x01
#define NECP_POLICY_PASS_PF_TAG 0x02
/*
* DROP Result Flags
*/
#define NECP_POLICY_DROP_FLAG_LOCAL_NETWORK 0x01
/*
* Route Rules
* Detailed parameters for NECP_POLICY_RESULT_ROUTE_RULES.
*/
#define NECP_ROUTE_RULE_NONE 0 // N/A
#define NECP_ROUTE_RULE_DENY_INTERFACE 1 // String, or empty to match all
#define NECP_ROUTE_RULE_ALLOW_INTERFACE 2 // String, or empty to match all
#define NECP_ROUTE_RULE_QOS_MARKING 3 // String, or empty to match all
#define NECP_ROUTE_RULE_DENY_LQM_ABORT 4 // String, or empty to match all
#define NECP_ROUTE_RULE_USE_NETAGENT 5 // UUID, followed by string or empty
#define NECP_ROUTE_RULE_FLAG_CELLULAR 0x01
#define NECP_ROUTE_RULE_FLAG_WIFI 0x02
#define NECP_ROUTE_RULE_FLAG_WIRED 0x04
#define NECP_ROUTE_RULE_FLAG_EXPENSIVE 0x08
#define NECP_ROUTE_RULE_FLAG_CONSTRAINED 0x10
/*
* Error types
*/
#define NECP_ERROR_INTERNAL 0
#define NECP_ERROR_UNKNOWN_PACKET_TYPE 1
#define NECP_ERROR_INVALID_TLV 2
#define NECP_ERROR_POLICY_RESULT_INVALID 3
#define NECP_ERROR_POLICY_CONDITIONS_INVALID 4
#define NECP_ERROR_POLICY_ID_NOT_FOUND 5
#define NECP_ERROR_INVALID_PROCESS 6
#define NECP_ERROR_ROUTE_RULES_INVALID 7
// Modifiers
#define NECP_MASK_USERSPACE_ONLY 0x80000000 // on filter_control_unit value
struct necp_policy_condition_tc_range {
u_int32_t start_tc;
u_int32_t end_tc;
} __attribute__((__packed__));
struct necp_policy_condition_addr {
u_int8_t prefix;
union {
struct sockaddr sa;
struct sockaddr_in sin;
struct sockaddr_in6 sin6;
} address;
} __attribute__((__packed__));
struct necp_policy_condition_addr_range {
union {
struct sockaddr sa;
struct sockaddr_in sin;
struct sockaddr_in6 sin6;
} start_address;
union {
struct sockaddr sa;
struct sockaddr_in sin;
struct sockaddr_in6 sin6;
} end_address;
} __attribute__((__packed__));
struct necp_policy_condition_agent_type {
char agent_domain[32];
char agent_type[32];
} __attribute__((__packed__));
struct necp_policy_condition_sdk_version {
uint32_t platform; // e.g., PLATFORM_IOS
uint32_t min_version; // Encoded as XXXX.YY.ZZ
uint32_t version; // Encoded as XXXX.YY.ZZ
} __attribute__((__packed__));
#define NECP_SESSION_PRIORITY_UNKNOWN 0
#define NECP_SESSION_PRIORITY_CONTROL 1
#define NECP_SESSION_PRIORITY_PRIVILEGED_TUNNEL 2
#define NECP_SESSION_PRIORITY_HIGH 3
#define NECP_SESSION_PRIORITY_HIGH_1 4
#define NECP_SESSION_PRIORITY_HIGH_2 5
#define NECP_SESSION_PRIORITY_HIGH_3 6
#define NECP_SESSION_PRIORITY_HIGH_4 7
#define NECP_SESSION_PRIORITY_HIGH_RESTRICTED 8
#define NECP_SESSION_PRIORITY_DEFAULT 9
#define NECP_SESSION_PRIORITY_LOW 10
#define NECP_SESSION_NUM_PRIORITIES NECP_SESSION_PRIORITY_LOW
typedef u_int32_t necp_policy_id;
typedef u_int32_t necp_policy_order;
typedef u_int32_t necp_session_priority;
typedef u_int32_t necp_kernel_policy_result;
typedef u_int32_t necp_kernel_policy_filter;
typedef union {
u_int tunnel_interface_index;
u_int scoped_interface_index;
u_int32_t flow_divert_control_unit;
u_int32_t filter_control_unit;
u_int32_t pass_flags;
u_int32_t drop_flags;
} necp_kernel_policy_routing_result_parameter;
#define NECP_SERVICE_FLAGS_REGISTERED 0x01
#define NECP_MAX_NETAGENTS 8
#define NECP_AGENT_USE_FLAG_SCOPE 0x01
#define NECP_TFO_COOKIE_LEN_MAX 16
struct necp_aggregate_result {
necp_kernel_policy_result routing_result;
necp_kernel_policy_routing_result_parameter routing_result_parameter;
necp_kernel_policy_filter filter_control_unit;
u_int32_t flow_divert_aggregate_unit;
necp_kernel_policy_result service_action;
uuid_t service_uuid;
u_int32_t service_flags;
u_int32_t service_data;
u_int routed_interface_index;
u_int32_t policy_id;
uuid_t netagents[NECP_MAX_NETAGENTS];
u_int32_t netagent_use_flags[NECP_MAX_NETAGENTS];
struct ipv6_prefix nat64_prefixes[NAT64_MAX_NUM_PREFIXES];
u_int8_t mss_recommended;
};
/*
* Statistics. It would be nice if the definitions in ntstat.h could be used,
* but they get entangled with #defines for v4 etc in pfvar.h and it may be better practice
* to have separate definitions here.
*/
struct necp_stat_counts {
/* Counters */
u_int64_t necp_stat_rxpackets __attribute__((aligned(8)));
u_int64_t necp_stat_rxbytes __attribute__((aligned(8)));
u_int64_t necp_stat_txpackets __attribute__((aligned(8)));
u_int64_t necp_stat_txbytes __attribute__((aligned(8)));
u_int32_t necp_stat_rxduplicatebytes;
u_int32_t necp_stat_rxoutoforderbytes;
u_int32_t necp_stat_txretransmit;
u_int32_t necp_stat_connectattempts;
u_int32_t necp_stat_connectsuccesses;
u_int32_t necp_stat_min_rtt;
u_int32_t necp_stat_avg_rtt;
u_int32_t necp_stat_var_rtt;
#define NECP_STAT_ROUTE_FLAGS 1
u_int32_t necp_stat_route_flags;
};
// Note, some metadata is implicit in the necp client itself:
// From the process itself : pid, upid, uuid, proc name.
// From the necp client parameters: local and remote addresses, euuid, traffic class, ifindex
//
// The following may well be supplied via future necp client parameters,
// but they are here so they don't get forgotten.
struct necp_basic_metadata {
u_int32_t rcvbufsize;
u_int32_t rcvbufused;
};
struct necp_connection_probe_status {
unsigned int probe_activated : 1;
unsigned int write_probe_failed : 1;
unsigned int read_probe_failed : 1;
unsigned int conn_probe_failed : 1;
};
struct necp_extra_tcp_metadata {
struct necp_connection_probe_status probestatus;
u_int32_t sndbufsize;
u_int32_t sndbufused;
u_int32_t txunacked;
u_int32_t txwindow;
u_int32_t txcwindow;
u_int32_t flags; // use SOF_*
u_int32_t flags1; // use SOF1_*
u_int32_t traffic_mgt_flags;
u_int32_t cc_alg_index;
u_int32_t state;
};
struct necp_stats_hdr {
u_int32_t necp_stats_type __attribute__((aligned(8)));
u_int32_t necp_stats_ver;
u_int64_t __necp_stats_reserved; // Pad the field for future use
};
#define NECP_CLIENT_STATISTICS_TYPE_TCP 1 // Identifies use of necp_tcp_stats
#define NECP_CLIENT_STATISTICS_TYPE_UDP 2 // Identifies use of necp_udp_stats
#define NECP_CLIENT_STATISTICS_TYPE_QUIC 3 // Identifies use of necp_quic_stats
#define NECP_CLIENT_STATISTICS_TYPE_TCP_VER_1 1 // Currently supported version for TCP
#define NECP_CLIENT_STATISTICS_TYPE_UDP_VER_1 1 // Currently supported version for UDP
#define NECP_CLIENT_STATISTICS_TYPE_QUIC_VER_1 1 // Currently supported version for QUIC
#define NECP_CLIENT_STATISTICS_TYPE_TCP_CURRENT_VER NECP_CLIENT_STATISTICS_TYPE_TCP_VER_1
#define NECP_CLIENT_STATISTICS_TYPE_UDP_CURRENT_VER NECP_CLIENT_STATISTICS_TYPE_UDP_VER_1
#define NECP_CLIENT_STATISTICS_TYPE_QUIC_CURRENT_VER NECP_CLIENT_STATISTICS_TYPE_QUIC_VER_1
#define NECP_CLIENT_STATISTICS_EVENT_INIT 0x00000000 // Register the flow
#define NECP_CLIENT_STATISTICS_EVENT_TIME_WAIT 0x00000001 // The flow is effectively finished but waiting on timer
struct necp_tcp_stats {
struct necp_stats_hdr necp_tcp_hdr;
struct necp_stat_counts necp_tcp_counts;
struct necp_basic_metadata necp_tcp_basic;
struct necp_extra_tcp_metadata necp_tcp_extra;
};
struct necp_udp_stats {
struct necp_stats_hdr necp_udp_hdr;
struct necp_stat_counts necp_udp_counts;
struct necp_basic_metadata necp_udp_basic;
};
/*
* The following reflects the special case for QUIC.
* It is a streaming protocol built on top of UDP.
* Therefore QUIC stats are defined as basic UDP stats
* with some extra meta data.
* TODO: For now the extra metadata is an exact replica
* of the metadata for TCP. However keeping that separate allows
* the structures to diverge later as new stats are added.
*/
#define QUIC_STATELESS_RESET_TOKEN_SIZE 16
struct necp_extra_quic_metadata {
u_int32_t sndbufsize;
u_int32_t sndbufused;
u_int32_t txunacked;
u_int32_t txwindow;
u_int32_t txcwindow;
u_int32_t traffic_mgt_flags;
u_int32_t cc_alg_index;
u_int32_t state;
u_int8_t ssr_token[QUIC_STATELESS_RESET_TOKEN_SIZE];
};
#define necp_quic_hdr necp_quic_udp_stats.necp_udp_hdr
#define necp_quic_counts necp_quic_udp_stats.necp_udp_counts
#define necp_quic_basic necp_quic_udp_stats.necp_udp_basic
struct necp_quic_stats {
struct necp_udp_stats necp_quic_udp_stats;
struct necp_extra_quic_metadata necp_quic_extra;
};
typedef struct necp_all_stats {
union {
struct necp_tcp_stats tcp_stats;
struct necp_udp_stats udp_stats;
struct necp_quic_stats quic_stats;
} all_stats_u;
} necp_all_stats;
// Memory for statistics is requested via a necp_stats_bufreq
//
struct necp_stats_bufreq {
u_int32_t necp_stats_bufreq_id __attribute__((aligned(8)));
u_int32_t necp_stats_bufreq_type; // NECP_CLIENT_STATISTICS_TYPE_*
u_int32_t necp_stats_bufreq_ver; // NECP_CLIENT_STATISTICS_TYPE_*_VER
u_int32_t necp_stats_bufreq_size;
union {
void *necp_stats_bufreq_addr;
mach_vm_address_t necp_stats_bufreq_uaddr;
};
};
#define NECP_CLIENT_STATISTICS_BUFREQ_ID 0xbf // Distinguishes from statistics actions taking a necp_all_stats struct
// There is a limit to the number of statistics structures that may be allocated per process, subject to change
//
#define NECP_MAX_PER_PROCESS_CLIENT_STATISTICS_STRUCTS 512
#define NECP_TCP_ECN_HEURISTICS_SYN_RST 1
typedef struct necp_tcp_ecn_cache {
u_int8_t necp_tcp_ecn_heuristics_success:1;
u_int8_t necp_tcp_ecn_heuristics_loss:1;
u_int8_t necp_tcp_ecn_heuristics_drop_rst:1;
u_int8_t necp_tcp_ecn_heuristics_drop_rxmt:1;
u_int8_t necp_tcp_ecn_heuristics_aggressive:1;
u_int8_t necp_tcp_ecn_heuristics_syn_rst:1;
} necp_tcp_ecn_cache;
#define NECP_TCP_TFO_HEURISTICS_RST 1
typedef struct necp_tcp_tfo_cache {
u_int8_t necp_tcp_tfo_cookie[NECP_TFO_COOKIE_LEN_MAX];
u_int8_t necp_tcp_tfo_cookie_len;
u_int8_t necp_tcp_tfo_heuristics_success:1; // TFO succeeded with data in the SYN
u_int8_t necp_tcp_tfo_heuristics_loss:1; // TFO SYN-loss with data
u_int8_t necp_tcp_tfo_heuristics_middlebox:1; // TFO middlebox detected
u_int8_t necp_tcp_tfo_heuristics_success_req:1; // TFO succeeded with the TFO-option in the SYN
u_int8_t necp_tcp_tfo_heuristics_loss_req:1; // TFO SYN-loss with the TFO-option
u_int8_t necp_tcp_tfo_heuristics_rst_data:1; // Recevied RST upon SYN with data in the SYN
u_int8_t necp_tcp_tfo_heuristics_rst_req:1; // Received RST upon SYN with the TFO-option
} necp_tcp_tfo_cache;
#define NECP_CLIENT_CACHE_TYPE_ECN 1 // Identifies use of necp_tcp_ecn_cache
#define NECP_CLIENT_CACHE_TYPE_TFO 2 // Identifies use of necp_tcp_tfo_cache
#define NECP_CLIENT_CACHE_TYPE_ECN_VER_1 1 // Currently supported version for ECN
#define NECP_CLIENT_CACHE_TYPE_TFO_VER_1 1 // Currently supported version for TFO
typedef struct necp_cache_buffer {
u_int8_t necp_cache_buf_type; // NECP_CLIENT_CACHE_TYPE_*
u_int8_t necp_cache_buf_ver; // NECP_CLIENT_CACHE_TYPE_*_VER
u_int32_t necp_cache_buf_size;
mach_vm_address_t necp_cache_buf_addr;
} necp_cache_buffer;
/*
* NECP Client definitions
*/
#define NECP_MAX_CLIENT_PARAMETERS_SIZE 1024
#define NECP_MAX_CLIENT_RESULT_SIZE 512
#define NECP_OPEN_FLAG_OBSERVER 0x01 // Observers can query clients they don't own
#define NECP_OPEN_FLAG_BACKGROUND 0x02 // Mark this fd as backgrounded
#define NECP_OPEN_FLAG_PUSH_OBSERVER 0x04 // When used with the OBSERVER flag, allows updates to be pushed. Adding clients is not allowed in this mode.
#define NECP_FD_SUPPORTS_GUARD 1
#define NECP_CLIENT_ACTION_ADD 1 // Register a new client. Input: parameters in buffer; Output: client_id
#define NECP_CLIENT_ACTION_REMOVE 2 // Unregister a client. Input: client_id, optional struct ifnet_stats_per_flow
#define NECP_CLIENT_ACTION_COPY_PARAMETERS 3 // Copy client parameters. Input: client_id; Output: parameters in buffer
#define NECP_CLIENT_ACTION_COPY_RESULT 4 // Copy client result. Input: client_id; Output: result in buffer
#define NECP_CLIENT_ACTION_COPY_LIST 5 // Copy all client IDs. Output: struct necp_client_list in buffer
#define NECP_CLIENT_ACTION_REQUEST_NEXUS_INSTANCE 6 // Request a nexus instance from a nexus provider, optional struct necp_stats_bufreq
#define NECP_CLIENT_ACTION_AGENT 7 // Interact with agent. Input: client_id, agent parameters
#define NECP_CLIENT_ACTION_COPY_AGENT 8 // Copy agent content. Input: agent UUID; Output: struct netagent
#define NECP_CLIENT_ACTION_COPY_INTERFACE 9 // Copy interface details. Input: ifindex cast to UUID; Output: struct necp_interface_details
#define NECP_CLIENT_ACTION_SET_STATISTICS 10 // Deprecated
#define NECP_CLIENT_ACTION_COPY_ROUTE_STATISTICS 11 // Get route statistics. Input: client_id; Output: struct necp_stat_counts
#define NECP_CLIENT_ACTION_AGENT_USE 12 // Return the use count and increment the use count. Input/Output: struct necp_agent_use_parameters
#define NECP_CLIENT_ACTION_MAP_SYSCTLS 13 // Get the read-only sysctls memory location. Output: mach_vm_address_t
#define NECP_CLIENT_ACTION_UPDATE_CACHE 14 // Update heuristics and cache
#define NECP_CLIENT_ACTION_COPY_CLIENT_UPDATE 15 // Fetch an updated client for push-mode observer. Output: Client id, struct necp_client_observer_update in buffer
#define NECP_CLIENT_ACTION_COPY_UPDATED_RESULT 16 // Copy client result only if changed. Input: client_id; Output: result in buffer
#define NECP_CLIENT_ACTION_ADD_FLOW 17 // Add a flow. Input: client_id; Output: struct necp_client_add_flow
#define NECP_CLIENT_ACTION_REMOVE_FLOW 18 // Remove a flow. Input: flow_id, optional struct ifnet_stats_per_flow
#define NECP_CLIENT_ACTION_CLAIM 19 // Claim a client that has been added for this unique PID. Input: client_id
#define NECP_CLIENT_ACTION_SIGN 20 // Sign a resolver answer. Input: struct necp_client_resolver_answer; Output: signed tag, expected to be 32 bytes
#define NECP_CLIENT_ACTION_GET_INTERFACE_ADDRESS 21 // Get the best interface local address for given remote address. Input: ifindex, remote sockaddr; Output: matching local sockaddr
#define NECP_CLIENT_PARAMETER_APPLICATION NECP_POLICY_CONDITION_APPLICATION // Requires entitlement
#define NECP_CLIENT_PARAMETER_REAL_APPLICATION NECP_POLICY_CONDITION_REAL_APPLICATION // Requires entitlement
#define NECP_CLIENT_PARAMETER_DOMAIN NECP_POLICY_CONDITION_DOMAIN
#define NECP_CLIENT_PARAMETER_ACCOUNT NECP_POLICY_CONDITION_ACCOUNT
#define NECP_CLIENT_PARAMETER_PID NECP_POLICY_CONDITION_PID // Requires entitlement
#define NECP_CLIENT_PARAMETER_UID NECP_POLICY_CONDITION_UID // Requires entitlement
#define NECP_CLIENT_PARAMETER_BOUND_INTERFACE NECP_POLICY_CONDITION_BOUND_INTERFACE
#define NECP_CLIENT_PARAMETER_TRAFFIC_CLASS NECP_POLICY_CONDITION_TRAFFIC_CLASS
#define NECP_CLIENT_PARAMETER_IP_PROTOCOL NECP_POLICY_CONDITION_IP_PROTOCOL
#define NECP_CLIENT_PARAMETER_LOCAL_ADDRESS NECP_POLICY_CONDITION_LOCAL_ADDR
#define NECP_CLIENT_PARAMETER_REMOTE_ADDRESS NECP_POLICY_CONDITION_REMOTE_ADDR
#define NECP_CLIENT_PARAMETER_NEXUS_KEY 102
// "Prohibit" will never choose an interface with that property
#define NECP_CLIENT_PARAMETER_PROHIBIT_INTERFACE 100 // String, interface name
#define NECP_CLIENT_PARAMETER_PROHIBIT_IF_TYPE 101 // u_int8_t, see ifru_functional_type in <net/if.h>
#define NECP_CLIENT_PARAMETER_PROHIBIT_AGENT 102 // uuid_t, network agent UUID
#define NECP_CLIENT_PARAMETER_PROHIBIT_AGENT_TYPE 103 // struct necp_client_parameter_netagent_type
// "Require" will choose an interface with that property, or none if not found
#define NECP_CLIENT_PARAMETER_REQUIRE_IF_TYPE 111 // u_int8_t, see ifru_functional_type in <net/if.h>
#define NECP_CLIENT_PARAMETER_REQUIRE_AGENT 112 // uuid_t, network agent UUID
#define NECP_CLIENT_PARAMETER_REQUIRE_AGENT_TYPE 113 // struct necp_client_parameter_netagent_type
// "Prefer" will choose an interface with an agent, or best otherwise if not found
#define NECP_CLIENT_PARAMETER_PREFER_AGENT 122 // uuid_t, network agent UUID
#define NECP_CLIENT_PARAMETER_PREFER_AGENT_TYPE 123 // struct necp_client_parameter_netagent_type
// "Avoid" will choose an interface without an agent, or best otherwise if unavoidable
#define NECP_CLIENT_PARAMETER_AVOID_AGENT 124 // uuid_t, network agent UUID
#define NECP_CLIENT_PARAMETER_AVOID_AGENT_TYPE 125 // struct necp_client_parameter_netagent_type
// Use actions with NECP_CLIENT_ACTION_AGENT
#define NECP_CLIENT_PARAMETER_TRIGGER_AGENT 130 // uuid_t, network agent UUID
#define NECP_CLIENT_PARAMETER_ASSERT_AGENT 131 // uuid_t, network agent UUID
#define NECP_CLIENT_PARAMETER_UNASSERT_AGENT 132 // uuid_t, network agent UUID
#define NECP_CLIENT_PARAMETER_PARENT_ID 150 // uuid_t, client UUID
#define NECP_CLIENT_PARAMETER_LOCAL_ENDPOINT 200 // struct necp_client_endpoint
#define NECP_CLIENT_PARAMETER_REMOTE_ENDPOINT 201 // struct necp_client_endpoint
#define NECP_CLIENT_PARAMETER_BROWSE_DESCRIPTOR 202 // struct necp_client_endpoint
#define NECP_CLIENT_PARAMETER_RESOLVER_TAG 203 // Tag as bytes, expected to be 32 bytes
#define NECP_CLIENT_PARAMETER_ADVERTISE_DESCRIPTOR 204 // struct necp_client_endpoint
#define NECP_CLIENT_PARAMETER_DELEGATED_UPID 210 // u_int64_t, requires entitlement
#define NECP_CLIENT_PARAMETER_ETHERTYPE 220 // u_int16_t, ethertype
#define NECP_CLIENT_PARAMETER_TRANSPORT_PROTOCOL 221 // u_int8_t, IPPROTO_
#define NECP_CLIENT_PARAMETER_LOCAL_ADDRESS_PREFERENCE 230 // u_int8_t, NECP_CLIENT_PARAMETER_LOCAL_ADDRESS_PREFERENCE_
#define NECP_CLIENT_PARAMETER_LOCAL_ADDRESS_PREFERENCE_DEFAULT 0
#define NECP_CLIENT_PARAMETER_LOCAL_ADDRESS_PREFERENCE_TEMPORARY 1
#define NECP_CLIENT_PARAMETER_LOCAL_ADDRESS_PREFERENCE_STABLE 2
#define NECP_CLIENT_PARAMETER_FLAGS 250 // u_int32_t, see NECP_CLIENT_PAREMETER_FLAG_* values
#define NECP_CLIENT_PARAMETER_FLAG_MULTIPATH 0x0001 // Get multipath interface results
#define NECP_CLIENT_PARAMETER_FLAG_BROWSE 0x0002 // Agent assertions on nexuses are requests to browse
#define NECP_CLIENT_PARAMETER_FLAG_PROHIBIT_EXPENSIVE 0x0004 // Prohibit expensive interfaces
#define NECP_CLIENT_PARAMETER_FLAG_LISTENER 0x0008 // Client is interested in listening for inbound connections
#define NECP_CLIENT_PARAMETER_FLAG_DISCRETIONARY 0x0010 // Client's traffic is discretionary, and eligible for early defuncting
#define NECP_CLIENT_PARAMETER_FLAG_ECN_ENABLE 0x0020 // Client is requesting to enable ECN
#define NECP_CLIENT_PARAMETER_FLAG_ECN_DISABLE 0x0040 // Client is requesting to disable ECN
#define NECP_CLIENT_PARAMETER_FLAG_TFO_ENABLE 0x0080 // Client is requesting to enable TFO
#define NECP_CLIENT_PARAMETER_FLAG_ONLY_PRIMARY_REQUIRES_TYPE 0x0100 // Interpret NECP_CLIENT_PARAMETER_REQUIRE_IF_TYPE only for primary interface, and allow exceptions for multipath or listeners
#define NECP_CLIENT_PARAMETER_FLAG_CUSTOM_ETHER 0x0200 // Client expects to open a custom ethernet channel
#define NECP_CLIENT_PARAMETER_FLAG_CUSTOM_IP 0x0400 // Client expects to open a custom IP protocol channel
#define NECP_CLIENT_PARAMETER_FLAG_INTERPOSE 0x0800 // Client expects to open an interpose filter channel
#define NECP_CLIENT_PARAMETER_FLAG_PROHIBIT_CONSTRAINED 0x1000 // Prohibit constrained interfaces
#define NECP_CLIENT_PARAMETER_FLAG_FALLBACK_TRAFFIC 0x2000 // Fallback traffic
#define NECP_CLIENT_PARAMETER_FLAG_INBOUND 0x4000 // Flow is inbound (passive)
#define NECP_CLIENT_RESULT_CLIENT_ID 1 // uuid_t
#define NECP_CLIENT_RESULT_POLICY_RESULT 2 // u_int32_t
#define NECP_CLIENT_RESULT_POLICY_RESULT_PARAMETER 3 // u_int32_t
#define NECP_CLIENT_RESULT_FILTER_CONTROL_UNIT 4 // u_int32_t
#define NECP_CLIENT_RESULT_INTERFACE_INDEX 5 // u_int32_t
#define NECP_CLIENT_RESULT_NETAGENT 6 // struct necp_client_result_netagent
#define NECP_CLIENT_RESULT_FLAGS 7 // u_int32_t, see NECP_CLIENT_RESULT_FLAG_* values
#define NECP_CLIENT_RESULT_INTERFACE 8 // struct necp_client_result_interface
#define NECP_CLIENT_RESULT_INTERFACE_OPTION 9 // struct necp_client_interface_option
#define NECP_CLIENT_RESULT_EFFECTIVE_MTU 10 // u_int32_t
#define NECP_CLIENT_RESULT_FLOW 11 // TLV array of a single flow's state
#define NECP_CLIENT_RESULT_PROTO_CTL_EVENT 12
#define NECP_CLIENT_RESULT_TFO_COOKIE 13 // NECP_TFO_COOKIE_LEN_MAX
#define NECP_CLIENT_RESULT_TFO_FLAGS 14 // u_int8_t
#define NECP_CLIENT_RESULT_RECOMMENDED_MSS 15 // u_int8_t
#define NECP_CLIENT_RESULT_FLOW_ID 16 // uuid_t
#define NECP_CLIENT_RESULT_INTERFACE_TIME_DELTA 17 // u_int32_t, seconds since interface up/down
#define NECP_CLIENT_RESULT_REASON 18 // u_int32_t, see NECP_CLIENT_RESULT_REASON_* values
#define NECP_CLIENT_RESULT_FLOW_DIVERT_AGGREGATE_UNIT 19 // u_int32_t
#define NECP_CLIENT_RESULT_NEXUS_INSTANCE 100 // uuid_t
#define NECP_CLIENT_RESULT_NEXUS_PORT 101 // u_int16_t
#define NECP_CLIENT_RESULT_NEXUS_KEY 102 // uuid_t
#define NECP_CLIENT_RESULT_NEXUS_PORT_FLOW_INDEX 103 // u_int32_t
#define NECP_CLIENT_RESULT_NEXUS_FLOW_STATS 104 // struct sk_stats_flow *
#define NECP_CLIENT_RESULT_LOCAL_ENDPOINT 200 // struct necp_client_endpoint
#define NECP_CLIENT_RESULT_REMOTE_ENDPOINT 201 // struct necp_client_endpoint
#define NECP_CLIENT_RESULT_DISCOVERED_ENDPOINT 202 // struct necp_client_endpoint, result of browse
#define NECP_CLIENT_RESULT_RESOLVED_ENDPOINT 203 // struct necp_client_endpoint, result of resolve
#define NECP_CLIENT_RESULT_LOCAL_ETHER_ADDR 204 // struct ether_addr
#define NECP_CLIENT_RESULT_REMOTE_ETHER_ADDR 205 // struct ether_addr
#define NECP_CLIENT_RESULT_EFFECTIVE_TRAFFIC_CLASS 210 // u_int32_t
#define NECP_CLIENT_RESULT_TRAFFIC_MGMT_BG 211 // u_int32_t, 1: background, 0: not background
#define NECP_CLIENT_RESULT_GATEWAY 212 // struct necp_client_endpoint
#define NECP_CLIENT_RESULT_NAT64 213 // struct ipv6_prefix[NAT64_MAX_NUM_PREFIXES]
#define NECP_CLIENT_RESULT_FLAG_IS_LOCAL 0x0001 // Routes to this device
#define NECP_CLIENT_RESULT_FLAG_IS_DIRECT 0x0002 // Routes to directly accessible peer
#define NECP_CLIENT_RESULT_FLAG_HAS_IPV4 0x0004 // Supports IPv4
#define NECP_CLIENT_RESULT_FLAG_HAS_IPV6 0x0008 // Supports IPv6
#define NECP_CLIENT_RESULT_FLAG_DEFUNCT 0x0010 // Defunct
#define NECP_CLIENT_RESULT_FLAG_SATISFIED 0x0020 // Satisfied path
#define NECP_CLIENT_RESULT_FLAG_FLOW_ASSIGNED 0x0040 // Assigned, the flow is active
#define NECP_CLIENT_RESULT_FLAG_FLOW_VIABLE 0x0080 // Viable, the flow has a valid route
#define NECP_CLIENT_RESULT_FLAG_PROBE_CONNECTIVITY 0x0100 // Flow should probe connectivity
#define NECP_CLIENT_RESULT_FLAG_ECN_ENABLED 0x0200 // ECN should be used
#define NECP_CLIENT_RESULT_FLAG_FAST_OPEN_BLOCKED 0x0400 // Fast open should not be used
#define NECP_CLIENT_RESULT_FLAG_LINK_QUALITY_ABORT 0x0800 // Link quality is very bad, recommend close connections
#define NECP_CLIENT_RESULT_FLAG_ALLOW_QOS_MARKING 0x1000 // QoS marking is allowed
#define NECP_CLIENT_RESULT_FLAG_HAS_NAT64 0x2000 // Has NAT64 prefix
#define NECP_CLIENT_RESULT_FLAG_INTERFACE_LOW_POWER 0x4000 // Interface is in low-power mode
#define NECP_CLIENT_RESULT_FLAG_SPECIFIC_LISTENER 0x8000 // Listener should not listen on all interfaces
#define NECP_CLIENT_RESULT_FLAG_FORCE_UPDATE (NECP_CLIENT_RESULT_FLAG_HAS_IPV4 | NECP_CLIENT_RESULT_FLAG_HAS_IPV6 | NECP_CLIENT_RESULT_FLAG_HAS_NAT64 | NECP_CLIENT_RESULT_FLAG_INTERFACE_LOW_POWER)
#define NECP_CLIENT_RESULT_FAST_OPEN_SND_PROBE 0x01 // DEPRECATED - Fast open send probe
#define NECP_CLIENT_RESULT_FAST_OPEN_RCV_PROBE 0x02 // DEPRECATED - Fast open receive probe
#define NECP_CLIENT_RESULT_RECOMMENDED_MSS_NONE 0x01
#define NECP_CLIENT_RESULT_RECOMMENDED_MSS_LOW 0x02
#define NECP_CLIENT_RESULT_RECOMMENDED_MSS_MEDIUM 0x04
#define NECP_CLIENT_RESULT_REASON_EXPENSIVE_PROHIBITED 1 // Expensive networks were prohibited
#define NECP_CLIENT_RESULT_REASON_CONSTRAINED_PROHIBITED 2 // Constrained networks were prohibited
#define NECP_CLIENT_RESULT_REASON_CELLULAR_DENIED 3 // Denied by a cellular route rule
#define NECP_CLIENT_RESULT_REASON_WIFI_DENIED 4 // Denied by a wifi route rule
#define NECP_CLIENT_RESULT_REASON_LOCAL_NETWORK_PROHIBITED 5 // Local network access prohibited
struct necp_interface_signature {
u_int8_t signature[IFNET_SIGNATURELEN];
u_int8_t signature_len;
};
struct necp_interface_details {
char name[IFXNAMSIZ];
u_int32_t index;
u_int32_t generation;
u_int32_t functional_type;
u_int32_t delegate_index;
u_int32_t flags; // see NECP_INTERFACE_FLAG_*
u_int32_t mtu;
struct necp_interface_signature ipv4_signature;
struct necp_interface_signature ipv6_signature;
u_int32_t ipv4_netmask;
u_int32_t ipv4_broadcast;
};
#define NECP_INTERFACE_FLAG_EXPENSIVE 0x0001
#define NECP_INTERFACE_FLAG_TXSTART 0X0002
#define NECP_INTERFACE_FLAG_NOACKPRI 0x0004
#define NECP_INTERFACE_FLAG_3CARRIERAGG 0x0008
#define NECP_INTERFACE_FLAG_IS_LOW_POWER 0x0010
#define NECP_INTERFACE_FLAG_MPK_LOG 0x0020 // Multi-layer Packet Logging
#define NECP_INTERFACE_FLAG_CONSTRAINED 0x0040
#define NECP_INTERFACE_FLAG_HAS_NETMASK 0x0080
#define NECP_INTERFACE_FLAG_HAS_BROADCAST 0x0100
#define NECP_INTERFACE_FLAG_SUPPORTS_MULTICAST 0x0200
#define NECP_INTERFACE_FLAG_HAS_DNS 0x0400
#define NECP_INTERFACE_FLAG_HAS_NAT64 0x0800
#define NECP_INTERFACE_FLAG_IPV4_ROUTABLE 0x1000
#define NECP_INTERFACE_FLAG_IPV6_ROUTABLE 0x2000
struct necp_client_parameter_netagent_type {
char netagent_domain[32];
char netagent_type[32];
};
struct necp_client_result_netagent {
u_int32_t generation;
uuid_t netagent_uuid;
};
struct necp_client_result_interface {
u_int32_t generation;
u_int32_t index;
};
#define NECP_USES_INTERFACE_OPTIONS_FOR_BROWSE 1
struct necp_client_interface_option {
u_int32_t interface_index;
u_int32_t interface_generation;
uuid_t nexus_agent;
};
struct necp_client_endpoint {
union {
struct sockaddr sa;
struct sockaddr_in sin;
struct sockaddr_in6 sin6;
struct {
u_int8_t endpoint_length;
u_int8_t endpoint_family; // Use AF_UNSPEC to target a name
u_int16_t endpoint_port;
u_int32_t endpoint_type; // Client-specific type
char endpoint_data[0]; // Type-specific endpoint value
} endpoint;
} u;
};
struct necp_client_list {
u_int32_t client_count;
uuid_t clients[0];
};
struct kev_necp_policies_changed_data {
u_int32_t changed_count; // Defaults to 0.
};
#define NECP_CLIENT_FLOW_FLAGS_ALLOW_NEXUS 0x01 // Request a nexus instance upon adding a flow
#define NECP_CLIENT_FLOW_FLAGS_USE_CLIENT_ID 0x02 // Register the client ID rather than the flow registration ID with network agents
#define NECP_CLIENT_FLOW_FLAGS_BROWSE 0x04 // Create request with a browse agent
#define NECP_CLIENT_FLOW_FLAGS_RESOLVE 0x08 // Create request with a resolution agent
#define NECP_CLIENT_FLOW_FLAGS_OVERRIDE_ADDRESS 0x10 // Flow has a different remote address than the parent flow
struct necp_client_flow_stats {
u_int32_t stats_type; // NECP_CLIENT_STATISTICS_TYPE_*
u_int32_t stats_version; // NECP_CLIENT_STATISTICS_TYPE_*_VER
u_int32_t stats_size;
mach_vm_address_t stats_addr;
};
struct necp_client_add_flow {
uuid_t agent_uuid;
uuid_t registration_id;
u_int16_t flags; // NECP_CLIENT_FLOW_FLAGS_*
u_int16_t stats_request_count;
struct necp_client_flow_stats stats_requests[0];
// sockaddr for override endpoint
} __attribute__((__packed__));
struct necp_agent_use_parameters {
uuid_t agent_uuid;
uint64_t out_use_count;
};
struct necp_client_flow_protoctl_event {
uint32_t protoctl_event_code;
uint32_t protoctl_event_val;
/* TCP seq number is in host byte order */
uint32_t protoctl_event_tcp_seq_num;
};
#define NECP_CLIENT_UPDATE_TYPE_PARAMETERS 1 // Parameters, for a new client
#define NECP_CLIENT_UPDATE_TYPE_RESULT 2 // Result, for a udpated client
#define NECP_CLIENT_UPDATE_TYPE_REMOVE 3 // Empty, for a removed client
struct necp_client_observer_update {
u_int32_t update_type; // NECP_CLIENT_UPDATE_TYPE_*
u_int8_t tlv_buffer[0]; // Parameters or result as TLVs, based on type
};
#define NECP_CLIENT_SIGN_TYPE_RESOLVER_ANSWER 1
struct necp_client_signable {
uuid_t client_id;
u_int32_t sign_type;
} __attribute__((__packed__));
struct necp_client_resolver_answer {
uuid_t client_id;
u_int32_t sign_type;
union sockaddr_in_4_6 address_answer;
u_int32_t hostname_length;
// hostname
} __attribute__((__packed__));
#define NECP_FILTER_UNIT_NO_FILTER UINT32_MAX // Reserved filter unit value that prohibits all filters and socket filters
/*
* The sysctl "net.necp.necp_drop_dest_level" controls the global drop rule policy for
* a set of destinations addresses at the given level -- the drop rule is the last one
* to be evaluated at this level.
*/
#define MAX_NECP_DROP_DEST_LEVEL_ADDRS 8
struct necp_drop_dest_entry {
u_int32_t level; // priority level
u_int32_t order; // session order (read only via sysctl)
struct necp_policy_condition_addr cond_addr;
};
struct necp_drop_dest_policy {
u_int32_t entry_count;
struct necp_drop_dest_entry entries[MAX_NECP_DROP_DEST_LEVEL_ADDRS];
};
#ifdef BSD_KERNEL_PRIVATE
#include <stdbool.h>
#include <sys/socketvar.h>
#include <sys/kern_control.h>
#include <netinet/ip_var.h>
#include <netinet6/ip6_var.h>
#include <net/if_var.h>
#include <sys/syslog.h>
#include <net/network_agent.h>
#include <net/ethernet.h>
#include <os/log.h>
SYSCTL_DECL(_net_necp);
extern os_log_t necp_log_handle;
#define NECPLOG(level, format, ...) do { \
if (level == LOG_ERR) { \
os_log_error(necp_log_handle, "%s: " format "\n", __FUNCTION__, __VA_ARGS__); \
} else { \
os_log(necp_log_handle, "%s: " format "\n", __FUNCTION__, __VA_ARGS__); \
} \
} while (0)
#define NECPLOG0(level, msg) do { \
if (level == LOG_ERR) { \
os_log_error(necp_log_handle, "%s: %s\n", __FUNCTION__, msg); \
} else { \
os_log(necp_log_handle, "%s: %s\n", __FUNCTION__, msg); \
} \
} while (0)
enum necp_fd_type_t {
necp_fd_type_invalid = 0,
necp_fd_type_session = 1,
necp_fd_type_client = 2,
};
union necp_sockaddr_union {
struct sockaddr sa;
struct sockaddr_in sin;
struct sockaddr_in6 sin6;
};
/*
* kstats
* The ustats and kstats region are mirrored. So when we allocate with
* skmem_cache from kstats region, we also get an ustats object. To tie them
* together, kstats has an extra *necp_stats_ustats pointer pointing to the
* ustats object
*/
struct necp_all_kstats {
struct necp_all_stats necp_stats_comm; /* kernel private stats snapshot */
struct necp_all_stats *necp_stats_ustats; /* points to user-visible stats (in shared ustats region) */
};
extern errno_t necp_client_init(void);
extern int necp_application_find_policy_match_internal(proc_t proc, u_int8_t *parameters, u_int32_t parameters_size,
struct necp_aggregate_result *returned_result,
u_int32_t *flags, u_int32_t *reason, u_int required_interface_index,
const union necp_sockaddr_union *override_local_addr,
const union necp_sockaddr_union *override_remote_addr,
struct necp_client_endpoint *returned_v4_gateway,
struct necp_client_endpoint *returned_v6_gateway,
struct rtentry **returned_route, bool ignore_address,
bool has_client,
uuid_t *returned_override_euuid);
/*
* TLV utilities
*
* Note that these functions (other than necp_buffer_find_tlv) do not check the length of the entire buffer,
* so the caller must be sure that the entire TLV is within bounds.
*/
struct necp_tlv_header {
u_int8_t type;
u_int32_t length;
} __attribute__((__packed__));
extern u_int8_t *necp_buffer_write_tlv(u_int8_t *cursor, u_int8_t type, u_int32_t length, const void *value,
u_int8_t *buffer, u_int32_t buffer_length);
extern u_int8_t *necp_buffer_write_tlv_if_different(u_int8_t *cursor, u_int8_t type,
u_int32_t length, const void *value, bool *updated,
u_int8_t *buffer, u_int32_t buffer_length);
extern u_int8_t necp_buffer_get_tlv_type(u_int8_t *buffer, int tlv_offset);
extern u_int32_t necp_buffer_get_tlv_length(u_int8_t *buffer, int tlv_offset);
extern u_int8_t *necp_buffer_get_tlv_value(u_int8_t *buffer, int tlv_offset, u_int32_t *value_size);
extern int necp_buffer_find_tlv(u_int8_t *buffer, u_int32_t buffer_length, int offset, u_int8_t type, int *err, int next);
#define NECPCTL_DROP_ALL_LEVEL 1 /* Drop all packets if no policy matches above this level */
#define NECPCTL_DEBUG 2 /* Log all kernel policy matches */
#define NECPCTL_PASS_LOOPBACK 3 /* Pass all loopback traffic */
#define NECPCTL_PASS_KEEPALIVES 4 /* Pass all kernel-generated keepalive traffic */
#define NECPCTL_SOCKET_POLICY_COUNT 5 /* Count of all socket-level policies */
#define NECPCTL_SOCKET_NON_APP_POLICY_COUNT 6 /* Count of non-per-app socket-level policies */
#define NECPCTL_IP_POLICY_COUNT 7 /* Count of all ip-level policies */
#define NECPCTL_SESSION_COUNT 8 /* Count of NECP sessions */
#define NECPCTL_CLIENT_FD_COUNT 9 /* Count of NECP client fds */
#define NECPCTL_CLIENT_COUNT 10 /* Count of NECP clients */
#define NECPCTL_ARENA_COUNT 11 /* Count of NECP arenas (stats, etc) */
#define NECPCTL_NEXUS_FLOW_COUNT 12 /* Count of NECP nexus flows */
#define NECPCTL_SOCKET_FLOW_COUNT 13 /* Count of NECP socket flows */
#define NECPCTL_IF_FLOW_COUNT 14 /* Count of NECP socket flows */
#define NECPCTL_OBSERVER_FD_COUNT 15 /* Count of NECP observer fds */
#define NECPCTL_OBSERVER_MESSAGE_LIMIT 16 /* Number of of NECP observer messages allowed to be queued */
#define NECPCTL_SYSCTL_ARENA_COUNT 17 /* Count of sysctl arenas */
#define NECPCTL_DROP_UNENTITLED_LEVEL 18 /* Drop unentitled process traffic above this level */
#define NECPCTL_PASS_INTERPOSE 19 /* Pass interpose */
#define NECPCTL_RESTRICT_MULTICAST 20 /* Restrict multicast access */
#define NECPCTL_DEDUP_POLICIES 21 /* Dedup overlapping policies */
#define NECP_LOOPBACK_PASS_ALL 1 // Pass all loopback traffic
#define NECP_LOOPBACK_PASS_WITH_FILTER 2 // Pass all loopback traffic, but activate content filter and/or flow divert if applicable
#define NECPCTL_NAMES { \
{ 0, 0 }, \
{ "drop_all_level", CTLTYPE_INT }, \
{ "debug", CTLTYPE_INT }, \
{ "pass_loopback", CTLTYPE_INT }, \
{ "pass_keepalives", CTLTYPE_INT }, \
{ "pass_interpose", CTLTYPE_INT }, \
}
typedef u_int32_t necp_kernel_policy_id;
#define NECP_KERNEL_POLICY_ID_NONE 0
#define NECP_KERNEL_POLICY_ID_NO_MATCH 1
#define NECP_KERNEL_POLICY_ID_FIRST_VALID_SOCKET 2
#define NECP_KERNEL_POLICY_ID_FIRST_VALID_IP UINT16_MAX
typedef u_int32_t necp_app_id;
#define NECP_KERNEL_POLICY_RESULT_NONE 0
#define NECP_KERNEL_POLICY_RESULT_PASS NECP_POLICY_RESULT_PASS
#define NECP_KERNEL_POLICY_RESULT_SKIP NECP_POLICY_RESULT_SKIP
#define NECP_KERNEL_POLICY_RESULT_DROP NECP_POLICY_RESULT_DROP
#define NECP_KERNEL_POLICY_RESULT_SOCKET_DIVERT NECP_POLICY_RESULT_SOCKET_DIVERT
#define NECP_KERNEL_POLICY_RESULT_SOCKET_FILTER NECP_POLICY_RESULT_SOCKET_FILTER
#define NECP_KERNEL_POLICY_RESULT_IP_TUNNEL NECP_POLICY_RESULT_IP_TUNNEL
#define NECP_KERNEL_POLICY_RESULT_IP_FILTER NECP_POLICY_RESULT_IP_FILTER
#define NECP_KERNEL_POLICY_RESULT_TRIGGER NECP_POLICY_RESULT_TRIGGER
#define NECP_KERNEL_POLICY_RESULT_TRIGGER_IF_NEEDED NECP_POLICY_RESULT_TRIGGER_IF_NEEDED
#define NECP_KERNEL_POLICY_RESULT_TRIGGER_SCOPED NECP_POLICY_RESULT_TRIGGER_SCOPED
#define NECP_KERNEL_POLICY_RESULT_NO_TRIGGER_SCOPED NECP_POLICY_RESULT_NO_TRIGGER_SCOPED
#define NECP_KERNEL_POLICY_RESULT_SOCKET_SCOPED NECP_POLICY_RESULT_SOCKET_SCOPED
#define NECP_KERNEL_POLICY_RESULT_ROUTE_RULES NECP_POLICY_RESULT_ROUTE_RULES
#define NECP_KERNEL_POLICY_RESULT_USE_NETAGENT NECP_POLICY_RESULT_USE_NETAGENT
#define NECP_KERNEL_POLICY_RESULT_NETAGENT_SCOPED NECP_POLICY_RESULT_NETAGENT_SCOPED
#define NECP_KERNEL_POLICY_RESULT_SCOPED_DIRECT NECP_POLICY_RESULT_SCOPED_DIRECT
#define NECP_KERNEL_POLICY_RESULT_ALLOW_UNENTITLED NECP_POLICY_RESULT_ALLOW_UNENTITLED
#define NECP_KERNEL_POLICY_PASS_NO_SKIP_IPSEC NECP_POLICY_PASS_NO_SKIP_IPSEC
#define NECP_KERNEL_POLICY_PASS_PF_TAG NECP_POLICY_PASS_PF_TAG
#define NECP_KERNEL_POLICY_DROP_FLAG_LOCAL_NETWORK NECP_POLICY_DROP_FLAG_LOCAL_NETWORK
typedef struct {
u_int32_t identifier;
u_int32_t data;
} necp_kernel_policy_service;
typedef union {
u_int tunnel_interface_index;
u_int scoped_interface_index;
u_int32_t flow_divert_control_unit;
u_int32_t filter_control_unit;
u_int32_t skip_policy_order;
u_int32_t route_rule_id;
u_int32_t netagent_id;
u_int32_t pass_flags;
u_int32_t drop_flags;
necp_kernel_policy_service service;
} necp_kernel_policy_result_parameter;
enum necp_boolean_state {
necp_boolean_state_unknown = 0,
necp_boolean_state_false = 1,
necp_boolean_state_true = 2,
};
struct necp_kernel_socket_policy {
LIST_ENTRY(necp_kernel_socket_policy) chain;
necp_kernel_policy_id id;
necp_policy_order order;
u_int32_t session_order;
int session_pid;
u_int32_t condition_mask;
u_int32_t condition_negated_mask;
u_int32_t cond_client_flags;
necp_kernel_policy_id cond_policy_id;
u_int32_t cond_app_id; // Locally assigned ID value stored
u_int32_t cond_real_app_id; // Locally assigned ID value stored
char *cond_custom_entitlement; // String
u_int8_t cond_custom_entitlement_matched;// Boolean if entitlement matched app
u_int32_t cond_account_id; // Locally assigned ID value stored
char *cond_domain; // String
u_int8_t cond_domain_dot_count; // Number of dots in cond_domain
pid_t cond_pid;
uid_t cond_uid;
ifnet_t cond_bound_interface; // Matches specific binding only
struct necp_policy_condition_tc_range cond_traffic_class; // Matches traffic class in range
u_int16_t cond_protocol; // Matches IP protcol number
union necp_sockaddr_union cond_local_start; // Matches local IP address (or start)
union necp_sockaddr_union cond_local_end; // Matches IP address range
u_int8_t cond_local_prefix; // Defines subnet
union necp_sockaddr_union cond_remote_start; // Matches remote IP address (or start)
union necp_sockaddr_union cond_remote_end; // Matches IP address range
u_int8_t cond_remote_prefix; // Defines subnet
struct necp_policy_condition_agent_type cond_agent_type;
struct necp_policy_condition_sdk_version cond_sdk_version;
char *cond_signing_identifier; // String
u_int16_t cond_packet_filter_tags;
int32_t cond_pid_version;
necp_kernel_policy_result result;
necp_kernel_policy_result_parameter result_parameter;
};
struct necp_kernel_ip_output_policy {
LIST_ENTRY(necp_kernel_ip_output_policy) chain;
necp_kernel_policy_id id;
necp_policy_order suborder;
necp_policy_order order;
u_int32_t session_order;
int session_pid;
u_int32_t condition_mask;
u_int32_t condition_negated_mask;
necp_kernel_policy_id cond_policy_id;
ifnet_t cond_bound_interface; // Matches specific binding only
u_int16_t cond_protocol; // Matches IP protcol number
union necp_sockaddr_union cond_local_start; // Matches local IP address (or start)
union necp_sockaddr_union cond_local_end; // Matches IP address range
u_int8_t cond_local_prefix; // Defines subnet
union necp_sockaddr_union cond_remote_start; // Matches remote IP address (or start)
union necp_sockaddr_union cond_remote_end; // Matches IP address range
u_int8_t cond_remote_prefix; // Defines subnet
u_int32_t cond_last_interface_index;
u_int16_t cond_packet_filter_tags;
necp_kernel_policy_result result;
necp_kernel_policy_result_parameter result_parameter;
};
#define MAX_KERNEL_SOCKET_POLICIES 1
#define MAX_KERNEL_IP_OUTPUT_POLICIES 4
struct necp_session_policy {
LIST_ENTRY(necp_session_policy) chain;
bool applied; // Applied into the kernel table
bool pending_deletion; // Waiting to be removed from kernel table
bool pending_update; // Policy has been modified since creation/last application
necp_policy_id local_id;
necp_policy_order order;
u_int8_t *result;
u_int32_t result_size;
u_int8_t *conditions; // Array of conditions, each with a u_int32_t length at start
u_int32_t conditions_size;
u_int8_t *route_rules; // Array of route rules, each with a u_int32_t length at start
u_int32_t route_rules_size;
uuid_t applied_app_uuid;
uuid_t applied_real_app_uuid;
char *applied_account;
uuid_t applied_result_uuid;
u_int32_t applied_route_rules_id;
necp_kernel_policy_id kernel_socket_policies[MAX_KERNEL_SOCKET_POLICIES];
necp_kernel_policy_id kernel_ip_output_policies[MAX_KERNEL_IP_OUTPUT_POLICIES];
};
struct necp_aggregate_socket_result {
necp_kernel_policy_result result;
necp_kernel_policy_result_parameter result_parameter;
necp_kernel_policy_filter filter_control_unit;
u_int32_t flow_divert_aggregate_unit;
u_int32_t route_rule_id;
int32_t qos_marking_gencount;
};
struct necp_inpcb_result {
u_int32_t app_id;
necp_kernel_policy_id policy_id;
necp_kernel_policy_id skip_policy_id;
int32_t policy_gencount;
u_int32_t flowhash;
u_int32_t network_denied_notifies;// Notification count
struct necp_aggregate_socket_result results;
};
extern errno_t necp_init(void);
extern errno_t necp_set_socket_attributes(struct socket *so, struct sockopt *sopt);
extern errno_t necp_get_socket_attributes(struct socket *so, struct sockopt *sopt);
extern void necp_inpcb_remove_cb(struct inpcb *inp);
extern void necp_inpcb_dispose(struct inpcb *inp);
extern u_int32_t necp_socket_get_content_filter_control_unit(struct socket *so);
extern bool necp_socket_should_use_flow_divert(struct inpcb *inp);
extern u_int32_t necp_socket_get_flow_divert_control_unit(struct inpcb *inp, uint32_t *aggregate_unit);
extern bool necp_socket_should_rescope(struct inpcb *inp);
extern u_int necp_socket_get_rescope_if_index(struct inpcb *inp);
extern u_int32_t necp_socket_get_effective_mtu(struct inpcb *inp, u_int32_t current_mtu);
extern bool necp_socket_is_allowed_to_recv_on_interface(struct inpcb *inp, ifnet_t interface);
extern bool necp_socket_is_allowed_to_send_recv(struct inpcb *inp, ifnet_t input_interface, u_int16_t pf_tag,
necp_kernel_policy_id *return_policy_id,
u_int32_t *return_route_rule_id,
necp_kernel_policy_id *return_skip_policy_id, u_int32_t *return_pass_flags);
extern bool necp_socket_is_allowed_to_send_recv_v4(struct inpcb *inp, u_int16_t local_port,
u_int16_t remote_port, struct in_addr *local_addr,
struct in_addr *remote_addr, ifnet_t input_interface, u_int16_t pf_tag,
necp_kernel_policy_id *return_policy_id, u_int32_t *return_route_rule_id,
necp_kernel_policy_id *return_skip_policy_id, u_int32_t *return_pass_flags);
extern bool necp_socket_is_allowed_to_send_recv_v6(struct inpcb *inp, u_int16_t local_port,
u_int16_t remote_port, struct in6_addr *local_addr,
struct in6_addr *remote_addr, ifnet_t input_interface, u_int16_t pf_tag,
necp_kernel_policy_id *return_policy_id, u_int32_t *return_route_rule_id,
necp_kernel_policy_id *return_skip_policy_id, u_int32_t *return_pass_flags);
extern void necp_socket_update_qos_marking(struct inpcb *inp, struct rtentry *route, u_int32_t route_rule_id);
extern bool necp_lookup_current_qos_marking(int32_t *qos_marking_gencount, struct rtentry *route, struct ifnet *interface, u_int32_t route_rule_id, bool old_qos_marking);
extern int necp_mark_packet_from_socket(struct mbuf *packet, struct inpcb *inp, necp_kernel_policy_id policy_id,
u_int32_t route_rule_id, necp_kernel_policy_id skip_policy_id, u_int32_t pass_flags);
extern necp_kernel_policy_id necp_get_policy_id_from_packet(struct mbuf *packet);
extern necp_kernel_policy_id necp_get_skip_policy_id_from_packet(struct mbuf *packet);
extern u_int16_t necp_get_packet_filter_tags_from_packet(struct mbuf *packet);
extern bool necp_packet_should_skip_filters(struct mbuf *packet);
extern u_int32_t necp_get_last_interface_index_from_packet(struct mbuf *packet);
extern u_int32_t necp_get_route_rule_id_from_packet(struct mbuf *packet);
extern int necp_get_app_uuid_from_packet(struct mbuf *packet,
uuid_t app_uuid);
extern necp_kernel_policy_id necp_socket_find_policy_match(struct inpcb *inp, struct sockaddr *override_local_addr,
struct sockaddr *override_remote_addr, u_int32_t override_bound_interface);
extern necp_kernel_policy_id necp_ip_output_find_policy_match(struct mbuf *packet, int flags, struct ip_out_args *ipoa,
struct rtentry *rt,
necp_kernel_policy_result *result,
necp_kernel_policy_result_parameter *result_parameter);
extern necp_kernel_policy_id necp_ip6_output_find_policy_match(struct mbuf *packet, int flags, struct ip6_out_args *ip6oa,
struct rtentry *rt,
necp_kernel_policy_result *result,
necp_kernel_policy_result_parameter *result_parameter);
extern int necp_mark_packet_from_ip(struct mbuf *packet, necp_kernel_policy_id policy_id);
extern int necp_mark_packet_from_interface(struct mbuf *packet, ifnet_t interface);
extern ifnet_t necp_get_ifnet_from_result_parameter(necp_kernel_policy_result_parameter *result_parameter);
extern bool necp_packet_can_rebind_to_ifnet(struct mbuf *packet, struct ifnet *interface, struct route *new_route, int family);
extern bool necp_packet_is_allowed_over_interface(struct mbuf *packet, struct ifnet *interface);
extern int necp_mark_packet_as_keepalive(struct mbuf *packet, bool is_keepalive);
extern bool necp_get_is_keepalive_from_packet(struct mbuf *packet);
extern int necp_sign_resolver_answer(uuid_t client_id, u_int8_t *query, u_int32_t query_length,
u_int8_t *answer, u_int32_t answer_length,
u_int8_t *tag, u_int32_t *out_tag_length);
extern bool necp_validate_resolver_answer(uuid_t client_id, u_int8_t *query, u_int32_t query_length,
u_int8_t *answer, u_int32_t answer_length,
u_int8_t *tag, u_int32_t tag_length);
extern void necp_update_all_clients(void); // Handle general re-evaluate event
extern void necp_update_all_clients_immediately_if_needed(bool should_update_immediately); // Handle general re-evaluate event
extern void necp_force_update_client(uuid_t client_id, uuid_t remove_netagent_uuid, u_int32_t agent_generation); // Cause a single client to get an update event
extern bool necp_set_client_as_background(proc_t proc, struct fileproc *fp, bool background); // Set all clients for an fp as background or not
struct necp_fd_data;
extern void necp_fd_memstatus(proc_t proc, uint32_t status, struct necp_fd_data *client_fd); // Purge memory of clients for the process
extern void necp_fd_defunct(proc_t proc, struct necp_fd_data *client_fd); // Set all clients for an process as defunct
extern int necp_client_register_socket_flow(pid_t pid, uuid_t client_id, struct inpcb *inp);
extern int necp_client_register_socket_listener(pid_t pid, uuid_t client_id, struct inpcb *inp);
extern int necp_client_assert_bb_radio_manager(uuid_t client_id, bool assert);
extern int necp_client_assign_from_socket(pid_t pid, uuid_t client_id, struct inpcb *inp);
extern int necp_assign_client_result(uuid_t netagent_uuid, uuid_t client_id,
u_int8_t *assigned_results, size_t assigned_results_length);
struct skmem_obj_info; // forward declaration
extern int necp_stats_ctor(struct skmem_obj_info *oi, struct skmem_obj_info *oim, void *arg, uint32_t skmflag);
extern int necp_stats_dtor(void *addr, void *arg);
/* value to denote invalid flow advisory index */
struct netagent_session;
extern int
necp_update_flow_protoctl_event(uuid_t netagent_uuid, uuid_t client_id,
uint32_t protoctl_event_code, uint32_t protoctl_event_val,
uint32_t protoctl_event_tcp_seq_num);
#define NECP_FLOWADV_IDX_INVALID UINT32_MAX
extern void *necp_create_nexus_assign_message(uuid_t nexus_instance, u_int32_t nexus_port, void *key, uint32_t key_length,
struct necp_client_endpoint *local_endpoint, struct necp_client_endpoint *remote_endpoint,
struct ether_addr *local_ether_addr,
u_int32_t flow_adv_index, void *flow_stats, size_t *message_length);
struct necp_client_nexus_parameters {
pid_t pid;
pid_t epid;
uuid_t euuid;
union necp_sockaddr_union local_addr;
union necp_sockaddr_union remote_addr;
u_int8_t ip_protocol;
u_int8_t transport_protocol;
u_int16_t ethertype;
u_int32_t traffic_class;
necp_policy_id policy_id;
unsigned is_listener:1;
unsigned is_interpose:1;
unsigned is_custom_ether:1;
unsigned allow_qos_marking:1;
unsigned override_address_selection:1;
unsigned use_stable_address:1; // Used if override_address_selection is set
};
struct necp_client_agent_parameters {
union {
struct necp_client_nexus_parameters nexus_request;
u_int8_t close_token[QUIC_STATELESS_RESET_TOKEN_SIZE];
} u;
};
#define NECP_CLIENT_CBACTION_NONVIABLE 1
#define NECP_CLIENT_CBACTION_VIABLE 2
#define NECP_CLIENT_CBACTION_INITIAL 3
struct necp_client_add_flow_default {
uuid_t agent_uuid;
uuid_t registration_id;
u_int16_t flags; // NECP_CLIENT_FLOW_FLAGS_*
u_int16_t stats_request_count;
struct necp_client_flow_stats stats_requests[1];
} __attribute__((__packed__));
typedef void (*necp_client_flow_cb)(void *handle, int action, uint32_t interface_index, uint32_t necp_flags, bool *viable);
extern void necp_client_reap_caches(boolean_t purge);
#endif /* BSD_KERNEL_PRIVATE */
#ifdef KERNEL
#ifdef KERNEL_PRIVATE
extern bool net_domain_contains_hostname(char *hostname_string, char *domain_string);
#endif /* KERNEL_PRIVATE */
#endif /* KERNEL */
#ifndef KERNEL
extern int necp_match_policy(const uint8_t *parameters, size_t parameters_size, struct necp_aggregate_result *returned_result);
extern int necp_open(int flags);
extern int necp_client_action(int necp_fd, uint32_t action, uuid_t client_id,
size_t client_id_len, uint8_t *buffer, size_t buffer_size);
extern int necp_session_open(int flags);
extern int necp_session_action(int necp_fd, uint32_t action,
uint8_t *in_buffer, size_t in_buffer_length,
uint8_t *out_buffer, size_t out_buffer_length);
#endif /* !KERNEL */
#endif /* PRIVATE */
#endif
Reference in New Issue View Git Blame Copy Permalink