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ZeroTierOne.h
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ZeroTierOne.h
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/*
* Copyright (c)2019 ZeroTier, Inc.
*
* Use of this software is governed by the Business Source License included
* in the LICENSE.TXT file in the project's root directory.
*
* Change Date: 2026-01-01
*
* On the date above, in accordance with the Business Source License, use
* of this software will be governed by version 2.0 of the Apache License.
*/
/****/
/*
* This defines the external C API for ZeroTier's core network virtualization
* engine.
*/
#ifndef ZT_ZEROTIER_API_H
#define ZT_ZEROTIER_API_H
#include <stdint.h>
// For the struct sockaddr_storage structure
#if defined(_WIN32) || defined(_WIN64)
#include <winsock2.h>
#include <ws2tcpip.h>
#include <windows.h>
#else /* not Windows */
#include <arpa/inet.h>
#include <netinet/in.h>
#include <sys/types.h>
#include <sys/socket.h>
#endif /* Windows or not */
#if defined (_MSC_VER)
#ifdef ZT_EXPORT
#define ZT_SDK_API __declspec(dllexport)
#else
#define ZT_SDK_API __declspec(dllimport)
#if !defined(ZT_SDK)
#ifdef _DEBUG
#ifdef _WIN64
#pragma comment(lib, "ZeroTierOne_x64d.lib")
#else
#pragma comment(lib, "ZeroTierOne_x86d.lib")
#endif
#else
#ifdef _WIN64
#pragma comment(lib, "ZeroTierOne_x64.lib")
#else
#pragma comment(lib, "ZeroTierOne_x86.lib")
#endif
#endif
#endif
#endif
#else
#define ZT_SDK_API
#endif
#ifdef __cplusplus
extern "C" {
#endif
/****************************************************************************/
/* Core constants */
/****************************************************************************/
/**
* Default UDP port for devices running a ZeroTier endpoint
*/
#define ZT_DEFAULT_PORT 9993
/**
* Minimum MTU, which is the minimum allowed by IPv6 and several specs
*/
#define ZT_MIN_MTU 1280
/**
* Maximum MTU for ZeroTier virtual networks
*/
#define ZT_MAX_MTU 10000
/**
* Minimum UDP payload size allowed
*/
#define ZT_MIN_PHYSMTU 1400
/**
* Maximum physical interface name length. This number is gigantic because of Windows.
*/
#define ZT_MAX_PHYSIFNAME 256
/**
* Default UDP payload size (physical path MTU) not including UDP and IP overhead
*
* This is small enough for PPPoE and for Google Cloud's bizarrely tiny MTUs.
* A 2800 byte payload still fits into two packets, so this should not impact
* real world throughput at all vs the previous default of 1444.
*/
#define ZT_DEFAULT_PHYSMTU 1432
/**
* Maximum physical UDP payload
*/
#define ZT_MAX_PHYSPAYLOAD 10100
/**
* Headroom for max physical MTU
*/
#define ZT_MAX_HEADROOM 224
/**
* Maximum payload MTU for UDP packets
*/
#define ZT_MAX_PHYSMTU (ZT_MAX_PHYSPAYLOAD + ZT_MAX_HEADROOM)
/**
* Maximum size of a remote trace message's serialized Dictionary
*/
#define ZT_MAX_REMOTE_TRACE_SIZE 10000
/**
* Maximum length of network short name
*/
#define ZT_MAX_NETWORK_SHORT_NAME_LENGTH 127
/**
* Maximum number of pushed routes on a network
*/
#define ZT_MAX_NETWORK_ROUTES 128
/**
* Maximum number of statically assigned IP addresses per network endpoint using ZT address management (not DHCP)
*/
#define ZT_MAX_ZT_ASSIGNED_ADDRESSES 32
/**
* Maximum number of "specialists" on a network -- bridges, relays, etc.
*/
#define ZT_MAX_NETWORK_SPECIALISTS 256
/**
* Maximum number of multicast group subscriptions per network
*/
#define ZT_MAX_NETWORK_MULTICAST_SUBSCRIPTIONS 4096
/**
* Rules engine revision ID, which specifies rules engine capabilities
*/
#define ZT_RULES_ENGINE_REVISION 1
/**
* Maximum number of base (non-capability) network rules
*/
#define ZT_MAX_NETWORK_RULES 1024
/**
* Maximum number of per-member capabilities per network
*/
#define ZT_MAX_NETWORK_CAPABILITIES 128
/**
* Maximum number of per-member tags per network
*/
#define ZT_MAX_NETWORK_TAGS 128
/**
* Maximum number of direct network paths to a given peer
*/
#define ZT_MAX_PEER_NETWORK_PATHS 64
/**
* Maximum number of path configurations that can be set
*/
#define ZT_MAX_CONFIGURABLE_PATHS 32
/**
* Maximum number of rules per capability
*/
#define ZT_MAX_CAPABILITY_RULES 64
/**
* Maximum number of certificates of ownership to assign to a single network member
*/
#define ZT_MAX_CERTIFICATES_OF_OWNERSHIP 4
/**
* Global maximum length for capability chain of custody (including initial issue)
*/
#define ZT_MAX_CAPABILITY_CUSTODY_CHAIN_LENGTH 7
/**
* Maximum number of multicast groups a device / network interface can be subscribed to at once
*/
#define ZT_MAX_MULTICAST_SUBSCRIPTIONS 1024
/**
* Maximum value for link quality (min is 0)
*/
#define ZT_PATH_LINK_QUALITY_MAX 0xff
/**
* Maximum number of DNS servers per domain
*/
#define ZT_MAX_DNS_SERVERS 4
/**
* Packet characteristics flag: packet direction, 1 if inbound 0 if outbound
*/
#define ZT_RULE_PACKET_CHARACTERISTICS_INBOUND 0x8000000000000000ULL
/**
* Packet characteristics flag: multicast or broadcast destination MAC
*/
#define ZT_RULE_PACKET_CHARACTERISTICS_MULTICAST 0x4000000000000000ULL
/**
* Packet characteristics flag: broadcast destination MAC
*/
#define ZT_RULE_PACKET_CHARACTERISTICS_BROADCAST 0x2000000000000000ULL
/**
* Packet characteristics flag: sending IP address has a certificate of ownership
*/
#define ZT_RULE_PACKET_CHARACTERISTICS_SENDER_IP_AUTHENTICATED 0x1000000000000000ULL
/**
* Packet characteristics flag: sending MAC address has a certificate of ownership
*/
#define ZT_RULE_PACKET_CHARACTERISTICS_SENDER_MAC_AUTHENTICATED 0x0800000000000000ULL
/**
* Packet characteristics flag: TCP left-most reserved bit
*/
#define ZT_RULE_PACKET_CHARACTERISTICS_TCP_RESERVED_0 0x0000000000000800ULL
/**
* Packet characteristics flag: TCP middle reserved bit
*/
#define ZT_RULE_PACKET_CHARACTERISTICS_TCP_RESERVED_1 0x0000000000000400ULL
/**
* Packet characteristics flag: TCP right-most reserved bit
*/
#define ZT_RULE_PACKET_CHARACTERISTICS_TCP_RESERVED_2 0x0000000000000200ULL
/**
* Packet characteristics flag: TCP NS flag
*/
#define ZT_RULE_PACKET_CHARACTERISTICS_TCP_NS 0x0000000000000100ULL
/**
* Packet characteristics flag: TCP CWR flag
*/
#define ZT_RULE_PACKET_CHARACTERISTICS_TCP_CWR 0x0000000000000080ULL
/**
* Packet characteristics flag: TCP ECE flag
*/
#define ZT_RULE_PACKET_CHARACTERISTICS_TCP_ECE 0x0000000000000040ULL
/**
* Packet characteristics flag: TCP URG flag
*/
#define ZT_RULE_PACKET_CHARACTERISTICS_TCP_URG 0x0000000000000020ULL
/**
* Packet characteristics flag: TCP ACK flag
*/
#define ZT_RULE_PACKET_CHARACTERISTICS_TCP_ACK 0x0000000000000010ULL
/**
* Packet characteristics flag: TCP PSH flag
*/
#define ZT_RULE_PACKET_CHARACTERISTICS_TCP_PSH 0x0000000000000008ULL
/**
* Packet characteristics flag: TCP RST flag
*/
#define ZT_RULE_PACKET_CHARACTERISTICS_TCP_RST 0x0000000000000004ULL
/**
* Packet characteristics flag: TCP SYN flag
*/
#define ZT_RULE_PACKET_CHARACTERISTICS_TCP_SYN 0x0000000000000002ULL
/**
* Packet characteristics flag: TCP FIN flag
*/
#define ZT_RULE_PACKET_CHARACTERISTICS_TCP_FIN 0x0000000000000001ULL
// Fields in remote trace dictionaries
#define ZT_REMOTE_TRACE_FIELD__EVENT "event"
#define ZT_REMOTE_TRACE_FIELD__NODE_ID "nodeId"
#define ZT_REMOTE_TRACE_FIELD__PACKET_ID "packetId"
#define ZT_REMOTE_TRACE_FIELD__PACKET_VERB "packetVerb"
#define ZT_REMOTE_TRACE_FIELD__PACKET_TRUSTED_PATH_ID "packetTrustedPathId"
#define ZT_REMOTE_TRACE_FIELD__PACKET_TRUSTED_PATH_APPROVED "packetTrustedPathApproved"
#define ZT_REMOTE_TRACE_FIELD__PACKET_HOPS "packetHops"
#define ZT_REMOTE_TRACE_FIELD__REMOTE_ZTADDR "remoteZtAddr"
#define ZT_REMOTE_TRACE_FIELD__REMOTE_PHYADDR "remotePhyAddr"
#define ZT_REMOTE_TRACE_FIELD__LOCAL_ZTADDR "localZtAddr"
#define ZT_REMOTE_TRACE_FIELD__LOCAL_PHYADDR "localPhyAddr"
#define ZT_REMOTE_TRACE_FIELD__LOCAL_SOCKET "localSocket"
#define ZT_REMOTE_TRACE_FIELD__IP_SCOPE "phyAddrIpScope"
#define ZT_REMOTE_TRACE_FIELD__NETWORK_ID "networkId"
#define ZT_REMOTE_TRACE_FIELD__SOURCE_ZTADDR "sourceZtAddr"
#define ZT_REMOTE_TRACE_FIELD__DEST_ZTADDR "destZtAddr"
#define ZT_REMOTE_TRACE_FIELD__SOURCE_MAC "sourceMac"
#define ZT_REMOTE_TRACE_FIELD__DEST_MAC "destMac"
#define ZT_REMOTE_TRACE_FIELD__ETHERTYPE "etherType"
#define ZT_REMOTE_TRACE_FIELD__VLAN_ID "vlanId"
#define ZT_REMOTE_TRACE_FIELD__FRAME_LENGTH "frameLength"
#define ZT_REMOTE_TRACE_FIELD__FRAME_DATA "frameData"
#define ZT_REMOTE_TRACE_FIELD__FILTER_FLAG_NOTEE "filterNoTee"
#define ZT_REMOTE_TRACE_FIELD__FILTER_FLAG_INBOUND "filterInbound"
#define ZT_REMOTE_TRACE_FIELD__FILTER_RESULT "filterResult"
#define ZT_REMOTE_TRACE_FIELD__FILTER_BASE_RULE_LOG "filterBaseRuleLog"
#define ZT_REMOTE_TRACE_FIELD__FILTER_CAP_RULE_LOG "filterCapRuleLog"
#define ZT_REMOTE_TRACE_FIELD__FILTER_CAP_ID "filterMatchingCapId"
#define ZT_REMOTE_TRACE_FIELD__CREDENTIAL_TYPE "credType"
#define ZT_REMOTE_TRACE_FIELD__CREDENTIAL_ID "credId"
#define ZT_REMOTE_TRACE_FIELD__CREDENTIAL_TIMESTAMP "credTs"
#define ZT_REMOTE_TRACE_FIELD__CREDENTIAL_INFO "credInfo"
#define ZT_REMOTE_TRACE_FIELD__CREDENTIAL_ISSUED_TO "credIssuedTo"
#define ZT_REMOTE_TRACE_FIELD__CREDENTIAL_REVOCATION_TARGET "credRevocationTarget"
#define ZT_REMOTE_TRACE_FIELD__REASON "reason"
#define ZT_REMOTE_TRACE_FIELD__NETWORK_CONTROLLER_ID "networkControllerId"
// Event types in remote traces
#define ZT_REMOTE_TRACE_EVENT__RESETTING_PATHS_IN_SCOPE 0x1000
#define ZT_REMOTE_TRACE_EVENT__PEER_CONFIRMING_UNKNOWN_PATH 0x1001
#define ZT_REMOTE_TRACE_EVENT__PEER_LEARNED_NEW_PATH 0x1002
#define ZT_REMOTE_TRACE_EVENT__PEER_REDIRECTED 0x1003
#define ZT_REMOTE_TRACE_EVENT__PACKET_MAC_FAILURE 0x1004
#define ZT_REMOTE_TRACE_EVENT__PACKET_INVALID 0x1005
#define ZT_REMOTE_TRACE_EVENT__DROPPED_HELLO 0x1006
#define ZT_REMOTE_TRACE_EVENT__OUTGOING_NETWORK_FRAME_DROPPED 0x2000
#define ZT_REMOTE_TRACE_EVENT__INCOMING_NETWORK_ACCESS_DENIED 0x2001
#define ZT_REMOTE_TRACE_EVENT__INCOMING_NETWORK_FRAME_DROPPED 0x2002
#define ZT_REMOTE_TRACE_EVENT__CREDENTIAL_REJECTED 0x2003
#define ZT_REMOTE_TRACE_EVENT__CREDENTIAL_ACCEPTED 0x2004
#define ZT_REMOTE_TRACE_EVENT__NETWORK_CONFIG_REQUEST_SENT 0x2005
#define ZT_REMOTE_TRACE_EVENT__NETWORK_FILTER_TRACE 0x2006
// Event types in remote traces in hex string form
#define ZT_REMOTE_TRACE_EVENT__RESETTING_PATHS_IN_SCOPE_S "1000"
#define ZT_REMOTE_TRACE_EVENT__PEER_CONFIRMING_UNKNOWN_PATH_S "1001"
#define ZT_REMOTE_TRACE_EVENT__PEER_LEARNED_NEW_PATH_S "1002"
#define ZT_REMOTE_TRACE_EVENT__PEER_REDIRECTED_S "1003"
#define ZT_REMOTE_TRACE_EVENT__PACKET_MAC_FAILURE_S "1004"
#define ZT_REMOTE_TRACE_EVENT__PACKET_INVALID_S "1005"
#define ZT_REMOTE_TRACE_EVENT__DROPPED_HELLO_S "1006"
#define ZT_REMOTE_TRACE_EVENT__OUTGOING_NETWORK_FRAME_DROPPED_S "2000"
#define ZT_REMOTE_TRACE_EVENT__INCOMING_NETWORK_ACCESS_DENIED_S "2001"
#define ZT_REMOTE_TRACE_EVENT__INCOMING_NETWORK_FRAME_DROPPED_S "2002"
#define ZT_REMOTE_TRACE_EVENT__CREDENTIAL_REJECTED_S "2003"
#define ZT_REMOTE_TRACE_EVENT__CREDENTIAL_ACCEPTED_S "2004"
#define ZT_REMOTE_TRACE_EVENT__NETWORK_CONFIG_REQUEST_SENT_S "2005"
#define ZT_REMOTE_TRACE_EVENT__NETWORK_FILTER_TRACE_S "2006"
/****************************************************************************/
/* Structures and other types */
/****************************************************************************/
/**
* Function return code: OK (0) or error results
*
* Use ZT_ResultCode_isFatal() to check for a fatal error. If a fatal error
* occurs, the node should be considered to not be working correctly. These
* indicate serious problems like an inaccessible data store or a compile
* problem.
*/
enum ZT_ResultCode
{
/**
* Operation completed normally
*/
ZT_RESULT_OK = 0,
/**
* Call produced no error but no action was taken
*/
ZT_RESULT_OK_IGNORED = 1,
// Fatal errors (>=100, <1000)
/**
* Ran out of memory
*/
ZT_RESULT_FATAL_ERROR_OUT_OF_MEMORY = 100,
/**
* Data store is not writable or has failed
*/
ZT_RESULT_FATAL_ERROR_DATA_STORE_FAILED = 101,
/**
* Internal error (e.g. unexpected exception indicating bug or build problem)
*/
ZT_RESULT_FATAL_ERROR_INTERNAL = 102,
// Non-fatal errors (>1000)
/**
* Network ID not valid
*/
ZT_RESULT_ERROR_NETWORK_NOT_FOUND = 1000,
/**
* The requested operation is not supported on this version or build
*/
ZT_RESULT_ERROR_UNSUPPORTED_OPERATION = 1001,
/**
* The requested operation was given a bad parameter or was called in an invalid state
*/
ZT_RESULT_ERROR_BAD_PARAMETER = 1002
};
/**
* @param x Result code
* @return True if result code indicates a fatal error
*/
#define ZT_ResultCode_isFatal(x) ((((int)(x)) >= 100)&&(((int)(x)) < 1000))
/**
* Status codes sent to status update callback when things happen
*/
enum ZT_Event
{
/**
* Node has been initialized
*
* This is the first event generated, and is always sent. It may occur
* before Node's constructor returns.
*
* Meta-data: none
*/
ZT_EVENT_UP = 0,
/**
* Node is offline -- network does not seem to be reachable by any available strategy
*
* Meta-data: none
*/
ZT_EVENT_OFFLINE = 1,
/**
* Node is online -- at least one upstream node appears reachable
*
* Meta-data: none
*/
ZT_EVENT_ONLINE = 2,
/**
* Node is shutting down
*
* This is generated within Node's destructor when it is being shut down.
* It's done for convenience, since cleaning up other state in the event
* handler may appear more idiomatic.
*
* Meta-data: none
*/
ZT_EVENT_DOWN = 3,
/**
* Your identity has collided with another node's ZeroTier address
*
* This happens if two different public keys both hash (via the algorithm
* in Identity::generate()) to the same 40-bit ZeroTier address.
*
* This is something you should "never" see, where "never" is defined as
* once per 2^39 new node initializations / identity creations. If you do
* see it, you're going to see it very soon after a node is first
* initialized.
*
* This is reported as an event rather than a return code since it's
* detected asynchronously via error messages from authoritative nodes.
*
* If this occurs, you must shut down and delete the node, delete the
* identity.secret record/file from the data store, and restart to generate
* a new identity. If you don't do this, you will not be able to communicate
* with other nodes.
*
* We'd automate this process, but we don't think silently deleting
* private keys or changing our address without telling the calling code
* is good form. It violates the principle of least surprise.
*
* You can technically get away with not handling this, but we recommend
* doing so in a mature reliable application. Besides, handling this
* condition is a good way to make sure it never arises. It's like how
* umbrellas prevent rain and smoke detectors prevent fires. They do, right?
*
* Meta-data: none
*/
ZT_EVENT_FATAL_ERROR_IDENTITY_COLLISION = 4,
/**
* Trace (debugging) message
*
* These events are only generated if this is a TRACE-enabled build.
*
* Meta-data: C string, TRACE message
*/
ZT_EVENT_TRACE = 5,
/**
* VERB_USER_MESSAGE received
*
* These are generated when a VERB_USER_MESSAGE packet is received via
* ZeroTier VL1.
*
* Meta-data: ZT_UserMessage structure
*/
ZT_EVENT_USER_MESSAGE = 6,
/**
* Remote trace received
*
* These are generated when a VERB_REMOTE_TRACE is received. Note
* that any node can fling one of these at us. It is your responsibility
* to filter and determine if it's worth paying attention to. If it's
* not just drop it. Most nodes that are not active controllers ignore
* these, and controllers only save them if they pertain to networks
* with remote tracing enabled.
*
* Meta-data: ZT_RemoteTrace structure
*/
ZT_EVENT_REMOTE_TRACE = 7
};
/**
* Payload of REMOTE_TRACE event
*/
typedef struct
{
/**
* ZeroTier address of sender
*/
uint64_t origin;
/**
* Null-terminated Dictionary containing key/value pairs sent by origin
*
* This *should* be a dictionary, but the implementation only checks
* that it is a valid non-empty C-style null-terminated string. Be very
* careful to use a well-tested parser to parse this as it represents
* data received from a potentially un-trusted peer on the network.
* Invalid payloads should be dropped.
*
* The contents of data[] may be modified.
*/
char *data;
/**
* Length of dict[] in bytes, including terminating null
*/
unsigned int len;
} ZT_RemoteTrace;
/**
* User message used with ZT_EVENT_USER_MESSAGE
*
* These are direct VL1 P2P messages for application use. Encryption and
* authentication in the ZeroTier protocol will guarantee the origin
* address and message content, but you are responsible for any other
* levels of authentication or access control that are required. Any node
* in the world can send you a user message! (Unless your network is air
* gapped.)
*/
typedef struct
{
/**
* ZeroTier address of sender (least significant 40 bits)
*/
uint64_t origin;
/**
* User message type ID
*/
uint64_t typeId;
/**
* User message data (not including type ID)
*/
const void *data;
/**
* Length of data in bytes
*/
unsigned int length;
} ZT_UserMessage;
/**
* Current node status
*/
typedef struct
{
/**
* 40-bit ZeroTier address of this node
*/
uint64_t address;
/**
* Public identity in string-serialized form (safe to send to others)
*
* This pointer will remain valid as long as the node exists.
*/
const char *publicIdentity;
/**
* Full identity including secret key in string-serialized form
*
* This pointer will remain valid as long as the node exists.
*/
const char *secretIdentity;
/**
* True if some kind of connectivity appears available
*/
int online;
} ZT_NodeStatus;
/**
* Internal node statistics
*
* This structure is subject to change between versions.
*/
typedef struct
{
/**
* Number of each protocol verb (possible verbs 0..31) received
*/
uint64_t inVerbCounts[32];
/**
* Number of bytes for each protocol verb received
*/
uint64_t inVerbBytes[32];
} ZT_NodeStatistics;
/**
* Virtual network status codes
*/
enum ZT_VirtualNetworkStatus
{
/**
* Waiting for network configuration (also means revision == 0)
*/
ZT_NETWORK_STATUS_REQUESTING_CONFIGURATION = 0,
/**
* Configuration received and we are authorized
*/
ZT_NETWORK_STATUS_OK = 1,
/**
* Netconf master told us 'nope'
*/
ZT_NETWORK_STATUS_ACCESS_DENIED = 2,
/**
* Netconf master exists, but this virtual network does not
*/
ZT_NETWORK_STATUS_NOT_FOUND = 3,
/**
* Initialization of network failed or other internal error
*/
ZT_NETWORK_STATUS_PORT_ERROR = 4,
/**
* ZeroTier core version too old
*/
ZT_NETWORK_STATUS_CLIENT_TOO_OLD = 5,
/**
* External authentication is required (e.g. SSO)
*/
ZT_NETWORK_STATUS_AUTHENTICATION_REQUIRED = 6
};
/**
* Virtual network type codes
*/
enum ZT_VirtualNetworkType
{
/**
* Private networks are authorized via certificates of membership
*/
ZT_NETWORK_TYPE_PRIVATE = 0,
/**
* Public networks have no access control -- they'll always be AUTHORIZED
*/
ZT_NETWORK_TYPE_PUBLIC = 1
};
/**
* The type of a virtual network rules table entry
*
* These must be from 0 to 63 since the most significant two bits of each
* rule type are NOT (MSB) and AND/OR.
*
* Each rule is composed of zero or more MATCHes followed by an ACTION.
* An ACTION with no MATCHes is always taken.
*/
enum ZT_VirtualNetworkRuleType
{
// 0 to 15 reserved for actions
/**
* Drop frame
*/
ZT_NETWORK_RULE_ACTION_DROP = 0,
/**
* Accept and pass frame
*/
ZT_NETWORK_RULE_ACTION_ACCEPT = 1,
/**
* Forward a copy of this frame to an observer (by ZT address)
*/
ZT_NETWORK_RULE_ACTION_TEE = 2,
/**
* Exactly like TEE but mandates ACKs from observer
*/
ZT_NETWORK_RULE_ACTION_WATCH = 3,
/**
* Drop and redirect this frame to another node (by ZT address)
*/
ZT_NETWORK_RULE_ACTION_REDIRECT = 4,
/**
* Stop evaluating rule set (drops unless there are capabilities, etc.)
*/
ZT_NETWORK_RULE_ACTION_BREAK = 5,
/**
* Place a matching frame in the specified QoS bucket
*/
ZT_NETWORK_RULE_ACTION_PRIORITY = 6,
/**
* Maximum ID for an ACTION, anything higher is a MATCH
*/
ZT_NETWORK_RULE_ACTION__MAX_ID = 15,
// 16 to 63 reserved for match criteria
ZT_NETWORK_RULE_MATCH_SOURCE_ZEROTIER_ADDRESS = 24,
ZT_NETWORK_RULE_MATCH_DEST_ZEROTIER_ADDRESS = 25,
ZT_NETWORK_RULE_MATCH_VLAN_ID = 26,
ZT_NETWORK_RULE_MATCH_VLAN_PCP = 27,
ZT_NETWORK_RULE_MATCH_VLAN_DEI = 28,
ZT_NETWORK_RULE_MATCH_MAC_SOURCE = 29,
ZT_NETWORK_RULE_MATCH_MAC_DEST = 30,
ZT_NETWORK_RULE_MATCH_IPV4_SOURCE = 31,
ZT_NETWORK_RULE_MATCH_IPV4_DEST = 32,
ZT_NETWORK_RULE_MATCH_IPV6_SOURCE = 33,
ZT_NETWORK_RULE_MATCH_IPV6_DEST = 34,
ZT_NETWORK_RULE_MATCH_IP_TOS = 35,
ZT_NETWORK_RULE_MATCH_IP_PROTOCOL = 36,
ZT_NETWORK_RULE_MATCH_ETHERTYPE = 37,
ZT_NETWORK_RULE_MATCH_ICMP = 38,
ZT_NETWORK_RULE_MATCH_IP_SOURCE_PORT_RANGE = 39,
ZT_NETWORK_RULE_MATCH_IP_DEST_PORT_RANGE = 40,
ZT_NETWORK_RULE_MATCH_CHARACTERISTICS = 41,
ZT_NETWORK_RULE_MATCH_FRAME_SIZE_RANGE = 42,
ZT_NETWORK_RULE_MATCH_RANDOM = 43,
ZT_NETWORK_RULE_MATCH_TAGS_DIFFERENCE = 44,
ZT_NETWORK_RULE_MATCH_TAGS_BITWISE_AND = 45,
ZT_NETWORK_RULE_MATCH_TAGS_BITWISE_OR = 46,
ZT_NETWORK_RULE_MATCH_TAGS_BITWISE_XOR = 47,
ZT_NETWORK_RULE_MATCH_TAGS_EQUAL = 48,
ZT_NETWORK_RULE_MATCH_TAG_SENDER = 49,
ZT_NETWORK_RULE_MATCH_TAG_RECEIVER = 50,
ZT_NETWORK_RULE_MATCH_INTEGER_RANGE = 51,
/**
* Maximum ID allowed for a MATCH entry in the rules table
*/
ZT_NETWORK_RULE_MATCH__MAX_ID = 63
};
/**
* Network flow rule
*
* Rules are stored in a table in which one or more match entries is followed
* by an action. If more than one match precedes an action, the rule is
* the AND of all matches. An action with no match is always taken since it
* matches anything. If nothing matches, the default action is DROP.
*
* This is designed to be a more memory-efficient way of storing rules than
* a wide table, yet still fast and simple to access in code.
*/
typedef struct
{
/**
* Type and flags
*
* Bits are: NOTTTTTT
*
* N - If true, sense of match is inverted (no effect on actions)
* O - If true, result is ORed with previous instead of ANDed (no effect on actions)
* T - Rule or action type
*
* AND with 0x3f to get type, 0x80 to get NOT bit, and 0x40 to get OR bit.
*/
uint8_t t;
/**
* Union containing the value of this rule -- which field is used depends on 't'
*/
union {
/**
* IPv6 address in big-endian / network byte order and netmask bits
*/
struct {
uint8_t ip[16];
uint8_t mask;
} ipv6;
/**
* IPv4 address in big-endian / network byte order
*/
struct {
uint32_t ip;
uint8_t mask;
} ipv4;
/**
* Integer range match in packet payload
*
* This allows matching of ranges of integers up to 64 bits wide where
* the range is +/- INT32_MAX. It's packed this way so it fits in 16
* bytes and doesn't enlarge the overall size of this union.
*/
struct {
uint64_t start; // integer range start
uint32_t end; // end of integer range (relative to start, inclusive, 0 for equality w/start)
uint16_t idx; // index in packet of integer
uint8_t format; // bits in integer (range 1-64, ((format&63)+1)) and endianness (MSB 1 for little, 0 for big)
} intRange;
/**
* Packet characteristic flags being matched
*/
uint64_t characteristics;
/**
* IP port range -- start-end inclusive -- host byte order
*/
uint16_t port[2];
/**
* 40-bit ZeroTier address (in least significant bits, host byte order)
*/
uint64_t zt;
/**
* 0 = never, UINT32_MAX = always
*/
uint32_t randomProbability;
/**
* 48-bit Ethernet MAC address in big-endian order
*/
uint8_t mac[6];
/**
* VLAN ID in host byte order
*/
uint16_t vlanId;
/**
* VLAN PCP (least significant 3 bits)
*/
uint8_t vlanPcp;
/**
* VLAN DEI (single bit / boolean)
*/
uint8_t vlanDei;
/**
* Ethernet type in host byte order
*/
uint16_t etherType;
/**
* IP protocol
*/
uint8_t ipProtocol;
/**
* IP type of service a.k.a. DSCP field
*/
struct {
uint8_t mask;
uint8_t value[2];
} ipTos;
/**
* Ethernet packet size in host byte order (start-end, inclusive)
*/
uint16_t frameSize[2];
/**
* ICMP type and code
*/
struct {
uint8_t type; // ICMP type, always matched
uint8_t code; // ICMP code if matched
uint8_t flags; // flag 0x01 means also match code, otherwise only match type
} icmp;
/**
* For tag-related rules
*/
struct {
uint32_t id;
uint32_t value;
} tag;
/**
* Destinations for TEE and REDIRECT
*/
struct {
uint64_t address;
uint32_t flags;
uint16_t length;
} fwd;
/**
* Quality of Service (QoS) bucket we want a frame to be placed in
*/
uint8_t qosBucket;
} v;
} ZT_VirtualNetworkRule;
/**
* A route to be pushed on a virtual network
*/
typedef struct
{
/**
* Target network / netmask bits (in port field) or NULL or 0.0.0.0/0 for default
*/
struct sockaddr_storage target;
/**
* Gateway IP address (port ignored) or NULL (family == 0) for LAN-local (no gateway)
*/
struct sockaddr_storage via;
/**
* Route flags
*/
uint16_t flags;
/**
* Route metric (not currently used)
*/
uint16_t metric;
} ZT_VirtualNetworkRoute;
/**
* DNS configuration to be pushed on a virtual network
*/
typedef struct
{
char domain[128];
struct sockaddr_storage server_addr[ZT_MAX_DNS_SERVERS];
} ZT_VirtualNetworkDNS;
/**
* An Ethernet multicast group
*/
typedef struct
{
/**
* MAC address (least significant 48 bits)
*/
uint64_t mac;
/**
* Additional distinguishing information (usually zero)
*/
unsigned long adi;
} ZT_MulticastGroup;
/**
* Virtual network configuration update type
*/