327 lines
15 KiB
C
327 lines
15 KiB
C
/*
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* Copyright (c) 2014-2017 Apple Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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#ifndef _NETAGENT_H_
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#define _NETAGENT_H_
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#include <net/net_kev.h>
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#ifdef PRIVATE
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#include <netinet/in.h>
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#include <sys/socket.h>
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#ifdef BSD_KERNEL_PRIVATE
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#include <stdbool.h>
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errno_t netagent_init(void);
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#endif
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/*
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* Name registered by the Network Agent kernel control
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*/
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#define NETAGENT_CONTROL_NAME "com.apple.net.netagent"
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struct netagent_message_header {
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u_int8_t message_type;
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u_int8_t message_flags;
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u_int32_t message_id;
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u_int32_t message_error;
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u_int32_t message_payload_length;
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};
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struct netagent_trigger_message {
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u_int32_t trigger_flags;
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pid_t trigger_pid;
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uuid_t trigger_proc_uuid;
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};
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struct netagent_client_message {
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uuid_t client_id;
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};
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struct netagent_client_error_message {
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uuid_t client_id;
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int32_t error_code;
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};
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struct netagent_client_group_message {
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uuid_t client_id;
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u_int8_t group_members[0];
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};
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struct netagent_assign_nexus_message {
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uuid_t assign_client_id;
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u_int8_t assign_necp_results[0];
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};
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#define NETAGENT_MESSAGE_TYPE_REGISTER 1 // Pass netagent to set, no return value
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#define NETAGENT_MESSAGE_TYPE_UNREGISTER 2 // No value, no return value
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#define NETAGENT_MESSAGE_TYPE_UPDATE 3 // Pass netagent to update, no return value
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#define NETAGENT_MESSAGE_TYPE_GET 4 // No value, return netagent
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#define NETAGENT_MESSAGE_TYPE_TRIGGER 5 // Kernel initiated, no reply expected
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#define NETAGENT_MESSAGE_TYPE_ASSERT 6 // Deprecated
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#define NETAGENT_MESSAGE_TYPE_UNASSERT 7 // Deprecated
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#define NETAGENT_MESSAGE_TYPE_TRIGGER_ASSERT 8 // Kernel initiated, no reply expected
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#define NETAGENT_MESSAGE_TYPE_TRIGGER_UNASSERT 9 // Kernel initiated, no reply expected
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#define NETAGENT_MESSAGE_TYPE_REQUEST_NEXUS 10 // Kernel initiated, struct netagent_client_message
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#define NETAGENT_MESSAGE_TYPE_ASSIGN_NEXUS 11 // Pass struct netagent_assign_nexus_message
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#define NETAGENT_MESSAGE_TYPE_CLOSE_NEXUS 12 // Kernel initiated, struct netagent_client_message
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#define NETAGENT_MESSAGE_TYPE_CLIENT_TRIGGER 13 // Kernel initiated, struct netagent_client_message
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#define NETAGENT_MESSAGE_TYPE_CLIENT_ASSERT 14 // Kernel initiated, struct netagent_client_message
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#define NETAGENT_MESSAGE_TYPE_CLIENT_UNASSERT 15 // Kernel initiated, struct netagent_client_message
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#define NETAGENT_OPTION_TYPE_REGISTER NETAGENT_MESSAGE_TYPE_REGISTER // Pass netagent to set, no return value
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#define NETAGENT_OPTION_TYPE_UNREGISTER NETAGENT_MESSAGE_TYPE_UNREGISTER // No value, no return value
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#define NETAGENT_OPTION_TYPE_UPDATE NETAGENT_MESSAGE_TYPE_UPDATE // Pass netagent to update, no return value
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#define NETAGENT_OPTION_TYPE_ASSIGN_NEXUS NETAGENT_MESSAGE_TYPE_ASSIGN_NEXUS // Pass struct netagent_assign_nexus_message
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#define NETAGENT_OPTION_TYPE_USE_COUNT 16 // Pass use count to set, get current use count
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#define NETAGENT_MESSAGE_TYPE_ABORT_NEXUS 17 // Kernel private
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#define NETAGENT_MESSAGE_TYPE_ADD_GROUP_MEMBERS 18 // Kernel initiated, struct netagent_client_group_message
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#define NETAGENT_MESSAGE_TYPE_REMOVE_GROUP_MEMBERS 19 // Kernel initiated, struct netagent_client_group_message
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#define NETAGENT_MESSAGE_TYPE_ASSIGN_GROUP_MEMBERS 20 // Pass struct netagent_assign_nexus_message
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#define NETAGENT_OPTION_TYPE_ADD_TOKEN 21 // Set new token bytes
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#define NETAGENT_OPTION_TYPE_FLUSH_TOKENS 22 // Flush all tokens
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#define NETAGENT_OPTION_TYPE_TOKEN_COUNT 23 // Get remaining token count (uint32_t)
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#define NETAGENT_OPTION_TYPE_TOKEN_LOW_WATER 24 // Set/get token low water mark (uint32_t)
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#define NETAGENT_MESSAGE_TYPE_TOKENS_NEEDED 25 // Kernel intiated, no content
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#define NETAGENT_MESSAGE_TYPE_CLIENT_ERROR 26 // Kernel intiated, struct netagent_client_error_message
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#define NETAGENT_OPTION_TYPE_RESET_CLIENT_ERROR 27 // Call to reset client error and counts
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#define NETAGENT_MESSAGE_FLAGS_RESPONSE 0x01 // Used for acks, errors, and query responses
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#define NETAGENT_MESSAGE_ERROR_NONE 0
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#define NETAGENT_MESSAGE_ERROR_INTERNAL 1
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#define NETAGENT_MESSAGE_ERROR_UNKNOWN_TYPE 2
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#define NETAGENT_MESSAGE_ERROR_INVALID_DATA 3
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#define NETAGENT_MESSAGE_ERROR_NOT_REGISTERED 4
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#define NETAGENT_MESSAGE_ERROR_ALREADY_REGISTERED 5
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#define NETAGENT_MESSAGE_ERROR_CANNOT_UPDATE 6
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#define NETAGENT_MESSAGE_ERROR_CANNOT_ASSIGN 7
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#define NETAGENT_DOMAINSIZE 32
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#define NETAGENT_TYPESIZE 32
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#define NETAGENT_DESCSIZE 128
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#define NETAGENT_MAX_DATA_SIZE 4096
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#define NETAGENT_MAX_TOKEN_COUNT 256
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#define NETAGENT_FLAG_REGISTERED 0x0001 // Agent is registered
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#define NETAGENT_FLAG_ACTIVE 0x0002 // Agent is active
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#define NETAGENT_FLAG_KERNEL_ACTIVATED 0x0004 // Agent can be activated by kernel activity
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#define NETAGENT_FLAG_USER_ACTIVATED 0x0008 // Agent can be activated by system call (netagent_trigger)
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#define NETAGENT_FLAG_VOLUNTARY 0x0010 // Use of agent is optional
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#define NETAGENT_FLAG_SPECIFIC_USE_ONLY 0x0020 // Agent should only be used and activated when specifically required
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#define NETAGENT_FLAG_NETWORK_PROVIDER 0x0040 // Agent provides network access
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#define NETAGENT_FLAG_NEXUS_PROVIDER 0x0080 // Agent provides a skywalk nexus
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#define NETAGENT_FLAG_SUPPORTS_BROWSE 0x0100 // Assertions will cause agent to fill in browse endpoints
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#define NETAGENT_FLAG_REQUIRES_ASSERT 0x0200 // Assertions are expected to be taken against this agent
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#define NETAGENT_FLAG_NEXUS_LISTENER 0x0400 // Nexus supports listeners
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#define NETAGENT_FLAG_UPDATE_IMMEDIATELY 0x0800 // Updates the clients without waiting for a leeway
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#define NETAGENT_FLAG_CUSTOM_ETHER_NEXUS 0x2000 // Agent provides a custom ethertype nexus
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#define NETAGENT_FLAG_CUSTOM_IP_NEXUS 0x4000 // Agent provides a custom IP nexus
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#define NETAGENT_FLAG_INTERPOSE_NEXUS 0x8000 // Agent provides an interpose nexus
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#define NETAGENT_FLAG_SUPPORTS_RESOLVE 0x10000 // Assertions will cause agent to fill in resolved endpoints
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#define NETAGENT_FLAG_SUPPORTS_GROUPS 0x20000 // Group actions can be performed
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#define NETAGENT_NEXUS_MAX_REQUEST_TYPES 16
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#define NETAGENT_NEXUS_MAX_RESOLUTION_TYPE_PAIRS 15
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#define NETAGENT_NEXUS_FRAME_TYPE_UNKNOWN 0
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#define NETAGENT_NEXUS_FRAME_TYPE_LINK 1
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#define NETAGENT_NEXUS_FRAME_TYPE_INTERNET 2
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#define NETAGENT_NEXUS_FRAME_TYPE_TRANSPORT 3
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#define NETAGENT_NEXUS_FRAME_TYPE_APPLICATION 4
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#define NETAGENT_NEXUS_ENDPOINT_TYPE_ADDRESS 1
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#define NETAGENT_NEXUS_ENDPOINT_TYPE_HOST 2
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#define NETAGENT_NEXUS_ENDPOINT_TYPE_BONJOUR 3
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#define NETAGENT_NEXUS_ENDPOINT_TYPE_SRV 5
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#define NETAGENT_NEXUS_FLAG_SUPPORTS_USER_PACKET_POOL 0x1
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#define NETAGENT_NEXUS_FLAG_ASSERT_UNSUPPORTED 0x2 // No calls to assert the agent are required
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#define NETAGENT_NEXUS_FLAG_SHOULD_USE_EVENT_RING 0x4 // indicates that nexus agent should use event rings
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struct netagent_nexus {
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u_int32_t frame_type;
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u_int32_t endpoint_assignment_type;
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u_int32_t endpoint_request_types[NETAGENT_NEXUS_MAX_REQUEST_TYPES];
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u_int32_t endpoint_resolution_type_pairs[NETAGENT_NEXUS_MAX_RESOLUTION_TYPE_PAIRS * 2];
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u_int32_t nexus_max_buf_size;
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u_int32_t reserved;
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u_int32_t nexus_flags;
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};
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#define NETAGENT_NEXUS_HAS_MAX_BUF_SIZE 1 // struct netagent_nexus includes nexus_max_buf_size
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#define NETAGENT_TRIGGER_FLAG_USER 0x0001 // Userspace triggered agent
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#define NETAGENT_TRIGGER_FLAG_KERNEL 0x0002 // Kernel triggered agent
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struct kev_netagent_data {
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uuid_t netagent_uuid;
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};
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// To be used with kernel control socket
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struct netagent {
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uuid_t netagent_uuid;
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char netagent_domain[NETAGENT_DOMAINSIZE];
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char netagent_type[NETAGENT_TYPESIZE];
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char netagent_desc[NETAGENT_DESCSIZE];
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u_int32_t netagent_flags;
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u_int32_t netagent_data_size;
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u_int8_t netagent_data[0];
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};
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// To be used with SIOCGAGENTDATA
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struct netagent_req {
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uuid_t netagent_uuid;
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char netagent_domain[NETAGENT_DOMAINSIZE];
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char netagent_type[NETAGENT_TYPESIZE];
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char netagent_desc[NETAGENT_DESCSIZE];
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u_int32_t netagent_flags;
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u_int32_t netagent_data_size;
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u_int8_t *netagent_data;
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};
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// To be used with SIOCGAGENTLIST
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struct netagentlist_req {
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u_int32_t data_size;
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u_int8_t *data;
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};
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#ifdef BSD_KERNEL_PRIVATE
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int netagent_ioctl(u_long cmd, caddr_t data);
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struct netagent_req32 {
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uuid_t netagent_uuid;
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char netagent_domain[NETAGENT_DOMAINSIZE];
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char netagent_type[NETAGENT_TYPESIZE];
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char netagent_desc[NETAGENT_DESCSIZE];
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u_int32_t netagent_flags;
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u_int32_t netagent_data_size;
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user32_addr_t netagent_data;
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};
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struct netagent_req64 {
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uuid_t netagent_uuid;
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char netagent_domain[NETAGENT_DOMAINSIZE];
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char netagent_type[NETAGENT_TYPESIZE];
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char netagent_desc[NETAGENT_DESCSIZE];
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u_int32_t netagent_flags;
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u_int32_t netagent_data_size;
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user64_addr_t netagent_data __attribute__((aligned(8)));
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};
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struct netagentlist_req32 {
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u_int32_t data_size;
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user32_addr_t data;
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};
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struct netagentlist_req64 {
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u_int32_t data_size;
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user64_addr_t data __attribute__((aligned(8)));
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};
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struct necp_client_agent_parameters;
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// Kernel accessors
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extern void netagent_post_updated_interfaces(uuid_t uuid); // To be called from interface ioctls
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extern u_int32_t netagent_get_flags(uuid_t uuid);
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extern errno_t netagent_set_flags(uuid_t uuid, u_int32_t flags);
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extern u_int32_t netagent_get_generation(uuid_t uuid);
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extern bool netagent_get_agent_domain_and_type(uuid_t uuid, char *domain, char *type);
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extern int netagent_kernel_trigger(uuid_t uuid);
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extern int netagent_client_message(uuid_t agent_uuid, uuid_t necp_client_uuid, pid_t pid, void *handle, u_int8_t message_type);
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extern int netagent_client_message_with_params(uuid_t agent_uuid,
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uuid_t necp_client_uuid,
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pid_t pid,
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void *handle,
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u_int8_t message_type,
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struct necp_client_agent_parameters *parameters,
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void **assigned_results,
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size_t *assigned_results_length);
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extern int netagent_copyout(uuid_t uuid, user_addr_t user_addr, u_int32_t user_size);
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extern int netagent_acquire_token(uuid_t uuid, user_addr_t user_addr, u_int32_t user_size, int *retval);
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// Kernel agent management
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typedef void * netagent_session_t;
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struct netagent_nexus_agent {
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struct netagent agent;
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struct netagent_nexus nexus_data;
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};
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#define NETAGENT_EVENT_TRIGGER NETAGENT_MESSAGE_TYPE_CLIENT_TRIGGER
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#define NETAGENT_EVENT_ASSERT NETAGENT_MESSAGE_TYPE_CLIENT_ASSERT
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#define NETAGENT_EVENT_UNASSERT NETAGENT_MESSAGE_TYPE_CLIENT_UNASSERT
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#define NETAGENT_EVENT_NEXUS_FLOW_INSERT NETAGENT_MESSAGE_TYPE_REQUEST_NEXUS
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#define NETAGENT_EVENT_NEXUS_FLOW_REMOVE NETAGENT_MESSAGE_TYPE_CLOSE_NEXUS
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#define NETAGENT_EVENT_NEXUS_FLOW_ABORT NETAGENT_MESSAGE_TYPE_ABORT_NEXUS
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typedef errno_t (*netagent_event_f)(u_int8_t event, uuid_t necp_client_uuid, pid_t pid, void *necp_handle, void *context, struct necp_client_agent_parameters *parameters, void **assigned_results, size_t *assigned_results_length);
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extern netagent_session_t netagent_create(netagent_event_f event_handler, void *handle);
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extern void netagent_destroy(netagent_session_t session);
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extern errno_t netagent_register(netagent_session_t session, struct netagent *agent);
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extern errno_t netagent_update(netagent_session_t session, struct netagent *agent);
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extern errno_t netagent_unregister(netagent_session_t session);
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extern errno_t netagent_assign_nexus(netagent_session_t _session,
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uuid_t necp_client_uuid,
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void *assign_message,
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size_t assigned_results_length); // Length of assigned_results_length
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extern errno_t netagent_update_flow_protoctl_event(netagent_session_t _session,
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uuid_t client_id,
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uint32_t protoctl_event_code,
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uint32_t protoctl_event_val,
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uint32_t protoctl_event_tcp_seq_number);
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extern int netagent_use(uuid_t agent_uuid, uint64_t *out_use_count);
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#endif /* BSD_KERNEL_PRIVATE */
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#ifndef KERNEL
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extern int netagent_trigger(uuid_t agent_uuid, size_t agent_uuidlen);
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#endif /* !KERNEL */
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#endif /* PRIVATE */
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#endif /* _NETAGENT_H_ */
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