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ZeroTierOne/include/ZeroTierOne.h
Adam Ierymenko 06730c7d1d BSL date bump
2020-08-20 12:51:39 -07:00

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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: 2025-01-01
*
* 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
/**
* 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 32
/**
* Maximum number of statically assigned IP addresses per network endpoint using ZT address management (not DHCP)
*/
#define ZT_MAX_ZT_ASSIGNED_ADDRESSES 16
/**
* 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 16
/**
* 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))
/**
* Multipath bonding policy
*/
enum ZT_MultipathBondingPolicy
{
/**
* Normal operation. No fault tolerance, no load balancing
*/
ZT_BONDING_POLICY_NONE = 0,
/**
* Sends traffic out on only one path at a time. Configurable immediate
* fail-over.
*/
ZT_BONDING_POLICY_ACTIVE_BACKUP = 1,
/**
* Sends traffic out on all paths
*/
ZT_BONDING_POLICY_BROADCAST = 2,
/**
* Stripes packets across all paths
*/
ZT_BONDING_POLICY_BALANCE_RR = 3,
/**
* Packets destined for specific peers will always be sent over the same
* path.
*/
ZT_BONDING_POLICY_BALANCE_XOR = 4,
/**
* Balances flows among all paths according to path performance
*/
ZT_BONDING_POLICY_BALANCE_AWARE = 5
};
/**
* Multipath active re-selection policy (linkSelectMethod)
*/
enum ZT_MultipathLinkSelectMethod
{
/**
* Primary link regains status as active link whenever it comes back up
* (default when links are explicitly specified)
*/
ZT_MULTIPATH_RESELECTION_POLICY_ALWAYS = 0,
/**
* Primary link regains status as active link when it comes back up and
* (if) it is better than the currently-active link.
*/
ZT_MULTIPATH_RESELECTION_POLICY_BETTER = 1,
/**
* Primary link regains status as active link only if the currently-active
* link fails.
*/
ZT_MULTIPATH_RESELECTION_POLICY_FAILURE = 2,
/**
* The primary link can change if a superior path is detected.
* (default if user provides no fail-over guidance)
*/
ZT_MULTIPATH_RESELECTION_POLICY_OPTIMIZE = 3
};
/**
* Mode of multipath link interface
*/
enum ZT_MultipathLinkMode
{
ZT_MULTIPATH_SLAVE_MODE_PRIMARY = 0,
ZT_MULTIPATH_SLAVE_MODE_SPARE = 1
};
/**
* Strategy for path monitoring
*/
enum ZT_MultipathMonitorStrategy
{
/**
* Use bonding policy's default strategy
*/
ZT_MULTIPATH_SLAVE_MONITOR_STRATEGY_DEFAULT = 0,
/**
* Does not actively send probes to judge aliveness, will rely
* on conventional traffic and summary statistics.
*/
ZT_MULTIPATH_SLAVE_MONITOR_STRATEGY_PASSIVE = 1,
/**
* Sends probes at a constant rate to judge aliveness.
*/
ZT_MULTIPATH_SLAVE_MONITOR_STRATEGY_ACTIVE = 2,
/**
* Sends probes at varying rates which correlate to native
* traffic loads to judge aliveness.
*/
ZT_MULTIPATH_SLAVE_MONITOR_STRATEGY_DYNAMIC = 3
};
/**
* Strategy for re-balancing protocol flows
*/
enum ZT_MultipathFlowRebalanceStrategy
{
/**
* Flows will only be re-balanced among links during
* assignment or failover. This minimizes the possibility
* of sequence reordering and is thus the default setting.
*/
ZT_MULTIPATH_FLOW_REBALANCE_STRATEGY_PASSIVE = 0,
/**
* Flows that are active may be re-assigned to a new more
* suitable link if it can be done without disrupting the flow.
* This setting can sometimes cause sequence re-ordering.
*/
ZT_MULTIPATH_FLOW_REBALANCE_STRATEGY_OPPORTUNISTIC = 0,
/**
* Flows will be continuously re-assigned the most suitable link
* in order to maximize "balance". This can often cause sequence
* reordering and is thus only reccomended for protocols like UDP.
*/
ZT_MULTIPATH_FLOW_REBALANCE_STRATEGY_AGGRESSIVE = 2
};
/**
* Indices for the path quality weight vector
*/
enum ZT_MultipathQualityWeightIndex
{
ZT_QOS_LAT_IDX,
ZT_QOS_LTM_IDX,
ZT_QOS_PDV_IDX,
ZT_QOS_PLR_IDX,
ZT_QOS_PER_IDX,
ZT_QOS_THR_IDX,
ZT_QOS_THM_IDX,
ZT_QOS_THV_IDX,
ZT_QOS_AGE_IDX,
ZT_QOS_SCP_IDX,
ZT_QOS_WEIGHT_SIZE
};
/**
* 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
};
/**
* 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
*/
enum ZT_VirtualNetworkConfigOperation
{
/**
* Network is coming up (either for the first time or after service restart)
*/
ZT_VIRTUAL_NETWORK_CONFIG_OPERATION_UP = 1,
/**
* Network configuration has been updated
*/
ZT_VIRTUAL_NETWORK_CONFIG_OPERATION_CONFIG_UPDATE = 2,
/**
* Network is going down (not permanently)
*/
ZT_VIRTUAL_NETWORK_CONFIG_OPERATION_DOWN = 3,
/**
* Network is going down permanently (leave/delete)
*/
ZT_VIRTUAL_NETWORK_CONFIG_OPERATION_DESTROY = 4
};
/**
* What trust hierarchy role does this peer have?
*/
enum ZT_PeerRole
{
ZT_PEER_ROLE_LEAF = 0, // ordinary node
ZT_PEER_ROLE_MOON = 1, // moon root
ZT_PEER_ROLE_PLANET = 2 // planetary root
};
/**
* Vendor ID
*/
enum ZT_Vendor
{
ZT_VENDOR_UNSPECIFIED = 0,
ZT_VENDOR_ZEROTIER = 1
};
/**
* Platform type
*/
enum ZT_Platform
{
ZT_PLATFORM_UNSPECIFIED = 0,
ZT_PLATFORM_LINUX = 1,
ZT_PLATFORM_WINDOWS = 2,
ZT_PLATFORM_MACOS = 3,
ZT_PLATFORM_ANDROID = 4,
ZT_PLATFORM_IOS = 5,
ZT_PLATFORM_SOLARIS_SMARTOS = 6,
ZT_PLATFORM_FREEBSD = 7,
ZT_PLATFORM_NETBSD = 8,
ZT_PLATFORM_OPENBSD = 9,
ZT_PLATFORM_RISCOS = 10,
ZT_PLATFORM_VXWORKS = 11,
ZT_PLATFORM_FREERTOS = 12,
ZT_PLATFORM_SYSBIOS = 13,
ZT_PLATFORM_HURD = 14,
ZT_PLATFORM_WEB = 15
};
/**
* Architecture type
*/
enum ZT_Architecture
{
ZT_ARCHITECTURE_UNSPECIFIED = 0,
ZT_ARCHITECTURE_X86 = 1,
ZT_ARCHITECTURE_X64 = 2,
ZT_ARCHITECTURE_ARM32 = 3,
ZT_ARCHITECTURE_ARM64 = 4,
ZT_ARCHITECTURE_MIPS32 = 5,
ZT_ARCHITECTURE_MIPS64 = 6,
ZT_ARCHITECTURE_POWER32 = 7,
ZT_ARCHITECTURE_POWER64 = 8,
ZT_ARCHITECTURE_OPENRISC32 = 9,
ZT_ARCHITECTURE_OPENRISC64 = 10,
ZT_ARCHITECTURE_SPARC32 = 11,
ZT_ARCHITECTURE_SPARC64 = 12,
ZT_ARCHITECTURE_DOTNET_CLR = 13,
ZT_ARCHITECTURE_JAVA_JVM = 14,
ZT_ARCHITECTURE_WEB = 15,
ZT_ARCHITECTURE_S390X = 16
};
/**
* Virtual network configuration
*/
typedef struct
{
/**
* 64-bit ZeroTier network ID
*/
uint64_t nwid;
/**
* Ethernet MAC (48 bits) that should be assigned to port
*/
uint64_t mac;
/**
* Network name (from network configuration master)
*/
char name[ZT_MAX_NETWORK_SHORT_NAME_LENGTH + 1];
/**
* Network configuration request status
*/
enum ZT_VirtualNetworkStatus status;
/**
* Network type
*/
enum ZT_VirtualNetworkType type;
/**
* Maximum interface MTU
*/
unsigned int mtu;
/**
* If nonzero, the network this port belongs to indicates DHCP availability
*
* This is a suggestion. The underlying implementation is free to ignore it
* for security or other reasons. This is simply a netconf parameter that
* means 'DHCP is available on this network.'
*/
int dhcp;
/**
* If nonzero, this port is allowed to bridge to other networks
*
* This is informational. If this is false (0), bridged packets will simply
* be dropped and bridging won't work.
*/
int bridge;
/**
* If nonzero, this network supports and allows broadcast (ff:ff:ff:ff:ff:ff) traffic
*/
int broadcastEnabled;
/**
* If the network is in PORT_ERROR state, this is the (negative) error code most recently reported
*/
int portError;
/**
* Revision number as reported by controller or 0 if still waiting for config
*/
unsigned long netconfRevision;
/**
* Number of assigned addresses
*/
unsigned int assignedAddressCount;
/**
* ZeroTier-assigned addresses (in sockaddr_storage structures)
*
* For IP, the port number of the sockaddr_XX structure contains the number
* of bits in the address netmask. Only the IP address and port are used.
* Other fields like interface number can be ignored.
*
* This is only used for ZeroTier-managed address assignments sent by the
* virtual network's configuration master.
*/
struct sockaddr_storage assignedAddresses[ZT_MAX_ZT_ASSIGNED_ADDRESSES];
/**
* Number of ZT-pushed routes
*/
unsigned int routeCount;
/**
* Routes (excluding those implied by assigned addresses and their masks)
*/
ZT_VirtualNetworkRoute routes[ZT_MAX_NETWORK_ROUTES];
/**
* Number of multicast groups subscribed
*/
unsigned int multicastSubscriptionCount;
/**
* Multicast groups to which this network's device is subscribed
*/
struct {
uint64_t mac; /* MAC in lower 48 bits */
uint32_t adi; /* Additional distinguishing information, usually zero except for IPv4 ARP groups */
} multicastSubscriptions[ZT_MAX_MULTICAST_SUBSCRIPTIONS];
/**
* Network specific DNS configuration
*/
ZT_VirtualNetworkDNS dns;
} ZT_VirtualNetworkConfig;
/**
* A list of networks
*/
typedef struct
{
ZT_VirtualNetworkConfig *networks;
unsigned long networkCount;
} ZT_VirtualNetworkList;
/**
* Physical path configuration
*/
typedef struct {
/**
* If non-zero set this physical network path to be trusted to disable encryption and authentication
*/
uint64_t trustedPathId;
/**
* Physical path MTU from ZT_MIN_PHYSMTU and ZT_MAX_PHYSMTU or <= 0 to use default
*/
int mtu;
} ZT_PhysicalPathConfiguration;
/**
* Physical network path to a peer
*/
typedef struct
{
/**
* Address of endpoint
*/
struct sockaddr_storage address;
/**
* Time of last send in milliseconds or 0 for never
*/
uint64_t lastSend;
/**
* Time of last receive in milliseconds or 0 for never
*/
uint64_t lastReceive;
/**
* Is this a trusted path? If so this will be its nonzero ID.
*/
uint64_t trustedPathId;
/**
* Mean latency
*/
float latencyMean;
/**
* Maximum observed latency
*/
float latencyMax;
/**
* Variance of latency
*/
float latencyVariance;
/**
* Packet loss ratio
*/
float packetLossRatio;
/**
* Packet error ratio
*/
float packetErrorRatio;
/**
* Mean throughput
*/
uint64_t throughputMean;
/**
* Maximum observed throughput
*/
float throughputMax;
/**
* Throughput variance
*/
float throughputVariance;
/**
* Address scope
*/
uint8_t scope;
/**
* Percentage of traffic allocated to this path
*/
float allocation;
/**
* Name of physical interface (for monitoring)
*/
char ifname[32];
uint64_t localSocket;
/**
* Is path expired?
*/
int expired;
/**
* Is path preferred?
*/
int preferred;
} ZT_PeerPhysicalPath;
/**
* Peer status result buffer
*/
typedef struct
{
/**
* ZeroTier address (40 bits)
*/
uint64_t address;
/**
* Remote major version or -1 if not known
*/
int versionMajor;
/**
* Remote minor version or -1 if not known
*/
int versionMinor;
/**
* Remote revision or -1 if not known
*/
int versionRev;
/**
* Last measured latency in milliseconds or -1 if unknown
*/
int latency;
/**
* What trust hierarchy role does this device have?
*/
enum ZT_PeerRole role;
/**
* Whether a multi-link bond has formed
*/
bool isBonded;
/**
* The bonding policy used to bond to this peer
*/
int bondingPolicy;
/**
* The health status of the bond to this peer
*/
bool isHealthy;
/**
* The number of links that comprise the bond to this peer that are considered alive
*/
int numAliveLinks;
/**
* The number of links that comprise the bond to this peer
*/
int numTotalLinks;
/**
* The user-specified bond template name
*/
char customBondName[32];
/**
* Number of paths (size of paths[])
*/
unsigned int pathCount;
/**
* Known network paths to peer
*/
ZT_PeerPhysicalPath paths[ZT_MAX_PEER_NETWORK_PATHS];
} ZT_Peer;
/**
* List of peers
*/
typedef struct
{
ZT_Peer *peers;
unsigned long peerCount;
} ZT_PeerList;
/**
* ZeroTier core state objects
*/
enum ZT_StateObjectType
{
/**
* Null object -- ignored
*/
ZT_STATE_OBJECT_NULL = 0,
/**
* Public address and public key
*
* Object ID: this node's address if known, or 0 if unknown (first query)
* Canonical path: <HOME>/identity.public
* Persistence: required
*/
ZT_STATE_OBJECT_IDENTITY_PUBLIC = 1,
/**
* Full identity with secret key
*
* Object ID: this node's address if known, or 0 if unknown (first query)
* Canonical path: <HOME>/identity.secret
* Persistence: required, should be stored with restricted permissions e.g. mode 0600 on *nix
*/
ZT_STATE_OBJECT_IDENTITY_SECRET = 2,
/**
* The planet (there is only one per... well... planet!)
*
* Object ID: world ID of planet, or 0 if unknown (first query)
* Canonical path: <HOME>/planet
* Persistence: recommended
*/
ZT_STATE_OBJECT_PLANET = 3,
/**
* A moon (federated root set)
*
* Object ID: world ID of moon
* Canonical path: <HOME>/moons.d/<ID>.moon (16-digit hex ID)
* Persistence: required if moon memberships should persist
*/
ZT_STATE_OBJECT_MOON = 4,
/**
* Peer and related state
*
* Object ID: peer address
* Canonical path: <HOME>/peers.d/<ID> (10-digit address
* Persistence: optional, can be cleared at any time
*/
ZT_STATE_OBJECT_PEER = 5,
/**
* Network configuration
*
* Object ID: peer address
* Canonical path: <HOME>/networks.d/<NETWORKID>.conf (16-digit hex ID)
* Persistence: required if network memberships should persist
*/
ZT_STATE_OBJECT_NETWORK_CONFIG = 6
};
/**
* An instance of a ZeroTier One node (opaque)
*/
typedef void ZT_Node;
/****************************************************************************/
/* Callbacks used by Node API */
/****************************************************************************/
/**
* Callback called to update virtual network port configuration
*
* This can be called at any time to update the configuration of a virtual
* network port. The parameter after the network ID specifies whether this
* port is being brought up, updated, brought down, or permanently deleted.
*
* This in turn should be used by the underlying implementation to create
* and configure tap devices at the OS (or virtual network stack) layer.
*
* The supplied config pointer is not guaranteed to remain valid, so make
* a copy if you want one.
*
* This should not call multicastSubscribe() or other network-modifying
* methods, as this could cause a deadlock in multithreaded or interrupt
* driven environments.
*
* This must return 0 on success. It can return any OS-dependent error code
* on failure, and this results in the network being placed into the
* PORT_ERROR state.
*/
typedef int (*ZT_VirtualNetworkConfigFunction)(
ZT_Node *, /* Node */
void *, /* User ptr */
void *, /* Thread ptr */
uint64_t, /* Network ID */
void **, /* Modifiable network user PTR */
enum ZT_VirtualNetworkConfigOperation, /* Config operation */
const ZT_VirtualNetworkConfig *); /* Network configuration */
/**
* Function to send a frame out to a virtual network port
*
* Parameters: (1) node, (2) user ptr, (3) network ID, (4) source MAC,
* (5) destination MAC, (6) ethertype, (7) VLAN ID, (8) frame data,
* (9) frame length.
*/
typedef void (*ZT_VirtualNetworkFrameFunction)(
ZT_Node *, /* Node */
void *, /* User ptr */
void *, /* Thread ptr */
uint64_t, /* Network ID */
void **, /* Modifiable network user PTR */
uint64_t, /* Source MAC */
uint64_t, /* Destination MAC */
unsigned int, /* Ethernet type */
unsigned int, /* VLAN ID (0 for none) */
const void *, /* Frame data */
unsigned int); /* Frame length */
/**
* Callback for events
*
* Events are generated when the node's status changes in a significant way
* and on certain non-fatal errors and events of interest. The final void
* parameter points to event meta-data. The type of event meta-data (and
* whether it is present at all) is event type dependent. See the comments
* in the definition of ZT_Event.
*/
typedef void (*ZT_EventCallback)(
ZT_Node *, /* Node */
void *, /* User ptr */
void *, /* Thread ptr */
enum ZT_Event, /* Event type */
const void *); /* Event payload (if applicable) */
/**
* Callback for storing and/or publishing state information
*
* See ZT_StateObjectType docs for information about each state object type
* and when and if it needs to be persisted.
*
* An object of length -1 is sent to indicate that an object should be
* deleted.
*/
typedef void (*ZT_StatePutFunction)(
ZT_Node *, /* Node */
void *, /* User ptr */
void *, /* Thread ptr */
enum ZT_StateObjectType, /* State object type */
const uint64_t [2], /* State object ID (if applicable) */
const void *, /* State object data */
int); /* Length of data or -1 to delete */
/**
* Callback for retrieving stored state information
*
* This function should return the number of bytes actually stored to the
* buffer or -1 if the state object was not found or the buffer was too
* small to store it.
*/
typedef int (*ZT_StateGetFunction)(
ZT_Node *, /* Node */
void *, /* User ptr */
void *, /* Thread ptr */
enum ZT_StateObjectType, /* State object type */
const uint64_t [2], /* State object ID (if applicable) */
void *, /* Buffer to store state object data */
unsigned int); /* Length of data buffer in bytes */
/**
* Function to send a ZeroTier packet out over the physical wire (L2/L3)
*
* Parameters:
* (1) Node
* (2) User pointer
* (3) Local socket or -1 for "all" or "any"
* (4) Remote address
* (5) Packet data
* (6) Packet length
* (7) Desired IP TTL or 0 to use default
*
* If there is only one local socket, the local socket can be ignored.
* If the local socket is -1, the packet should be sent out from all
* bound local sockets or a random bound local socket.
*
* If TTL is nonzero, packets should have their IP TTL value set to this
* value if possible. If this is not possible it is acceptable to ignore
* this value and send anyway with normal or default TTL.
*
* The function must return zero on success and may return any error code
* on failure. Note that success does not (of course) guarantee packet
* delivery. It only means that the packet appears to have been sent.
*/
typedef int (*ZT_WirePacketSendFunction)(
ZT_Node *, /* Node */
void *, /* User ptr */
void *, /* Thread ptr */
int64_t, /* Local socket */
const struct sockaddr_storage *, /* Remote address */
const void *, /* Packet data */
unsigned int, /* Packet length */
unsigned int); /* TTL or 0 to use default */
/**
* Function to check whether a path should be used for ZeroTier traffic
*
* Parameters:
* (1) Node
* (2) User pointer
* (3) ZeroTier address or 0 for none/any
* (4) Local socket or -1 if unknown
* (5) Remote address
*
* This function must return nonzero (true) if the path should be used.
*
* If no path check function is specified, ZeroTier will still exclude paths
* that overlap with ZeroTier-assigned and managed IP address blocks. But the
* use of a path check function is recommended to ensure that recursion does
* not occur in cases where addresses are assigned by the OS or managed by
* an out of band mechanism like DHCP. The path check function should examine
* all configured ZeroTier interfaces and check to ensure that the supplied
* addresses will not result in ZeroTier traffic being sent over a ZeroTier
* interface (recursion).
*/
typedef int (*ZT_PathCheckFunction)(
ZT_Node *, /* Node */
void *, /* User ptr */
void *, /* Thread ptr */
uint64_t, /* ZeroTier address */
int64_t, /* Local socket or -1 if unknown */
const struct sockaddr_storage *); /* Remote address */
/**
* Function to get physical addresses for ZeroTier peers
*
* Parameters:
* (1) Node
* (2) User pointer
* (3) ZeroTier address (least significant 40 bits)
* (4) Desired address family or -1 for any
* (5) Buffer to fill with result
*
* If provided this function will be occasionally called to get physical
* addresses that might be tried to reach a ZeroTier address. It must
* return a nonzero (true) value if the result buffer has been filled
* with an address.
*/
typedef int (*ZT_PathLookupFunction)(
ZT_Node *, /* Node */
void *, /* User ptr */
void *, /* Thread ptr */
uint64_t, /* ZeroTier address (40 bits) */
int, /* Desired ss_family or -1 for any */
struct sockaddr_storage *); /* Result buffer */
/****************************************************************************/
/* C Node API */
/****************************************************************************/
/**
* Structure for configuring ZeroTier core callback functions
*/
struct ZT_Node_Callbacks
{
/**
* Struct version -- must currently be 0
*/
long version;
/**
* REQUIRED: Function to store and/or replicate state objects
*/
ZT_StatePutFunction statePutFunction;
/**
* REQUIRED: Function to retrieve state objects from an object store
*/
ZT_StateGetFunction stateGetFunction;
/**
* REQUIRED: Function to send packets over the physical wire
*/
ZT_WirePacketSendFunction wirePacketSendFunction;
/**
* REQUIRED: Function to inject frames into a virtual network's TAP
*/
ZT_VirtualNetworkFrameFunction virtualNetworkFrameFunction;
/**
* REQUIRED: Function to be called when virtual networks are configured or changed
*/
ZT_VirtualNetworkConfigFunction virtualNetworkConfigFunction;
/**
* REQUIRED: Function to be called to notify external code of important events
*/
ZT_EventCallback eventCallback;
/**
* OPTIONAL: Function to check whether a given physical path should be used
*/
ZT_PathCheckFunction pathCheckFunction;
/**
* OPTIONAL: Function to get hints to physical paths to ZeroTier addresses
*/
ZT_PathLookupFunction pathLookupFunction;
};
/**
* Create a new ZeroTier node
*
* This will attempt to load its identity via the state get function in the
* callback struct. If that fails it will generate a new identity and store
* it. Identity generation can take anywhere from a few hundred milliseconds
* to a few seconds depending on your CPU speed.
*
* @param node Result: pointer is set to new node instance on success
* @param uptr User pointer to pass to functions/callbacks
* @param tptr Thread pointer to pass to functions/callbacks resulting from this call
* @param callbacks Callback function configuration
* @param now Current clock in milliseconds
* @return OK (0) or error code if a fatal error condition has occurred
*/
ZT_SDK_API enum ZT_ResultCode ZT_Node_new(ZT_Node **node,void *uptr,void *tptr,const struct ZT_Node_Callbacks *callbacks,int64_t now);
/**
* Delete a node and free all resources it consumes
*
* If you are using multiple threads, all other threads must be shut down
* first. This can crash if processXXX() methods are in progress.
*
* @param node Node to delete
*/
ZT_SDK_API void ZT_Node_delete(ZT_Node *node);
/**
* Process a packet received from the physical wire
*
* @param node Node instance
* @param tptr Thread pointer to pass to functions/callbacks resulting from this call
* @param now Current clock in milliseconds
* @param localSocket Local socket (you can use 0 if only one local socket is bound and ignore this)
* @param remoteAddress Origin of packet
* @param packetData Packet data
* @param packetLength Packet length
* @param nextBackgroundTaskDeadline Value/result: set to deadline for next call to processBackgroundTasks()
* @return OK (0) or error code if a fatal error condition has occurred
*/
ZT_SDK_API enum ZT_ResultCode ZT_Node_processWirePacket(
ZT_Node *node,
void *tptr,
int64_t now,
int64_t localSocket,
const struct sockaddr_storage *remoteAddress,
const void *packetData,
unsigned int packetLength,
volatile int64_t *nextBackgroundTaskDeadline);
/**
* Process a frame from a virtual network port (tap)
*
* @param node Node instance
* @param tptr Thread pointer to pass to functions/callbacks resulting from this call
* @param now Current clock in milliseconds
* @param nwid ZeroTier 64-bit virtual network ID
* @param sourceMac Source MAC address (least significant 48 bits)
* @param destMac Destination MAC address (least significant 48 bits)
* @param etherType 16-bit Ethernet frame type
* @param vlanId 10-bit VLAN ID or 0 if none
* @param frameData Frame payload data
* @param frameLength Frame payload length
* @param nextBackgroundTaskDeadline Value/result: set to deadline for next call to processBackgroundTasks()
* @return OK (0) or error code if a fatal error condition has occurred
*/
ZT_SDK_API enum ZT_ResultCode ZT_Node_processVirtualNetworkFrame(
ZT_Node *node,
void *tptr,
int64_t now,
uint64_t nwid,
uint64_t sourceMac,
uint64_t destMac,
unsigned int etherType,
unsigned int vlanId,
const void *frameData,
unsigned int frameLength,
volatile int64_t *nextBackgroundTaskDeadline);
/**
* Perform periodic background operations
*
* @param node Node instance
* @param tptr Thread pointer to pass to functions/callbacks resulting from this call
* @param now Current clock in milliseconds
* @param nextBackgroundTaskDeadline Value/result: set to deadline for next call to processBackgroundTasks()
* @return OK (0) or error code if a fatal error condition has occurred
*/
ZT_SDK_API enum ZT_ResultCode ZT_Node_processBackgroundTasks(ZT_Node *node,void *tptr,int64_t now,volatile int64_t *nextBackgroundTaskDeadline);
/**
* Join a network
*
* This may generate calls to the port config callback before it returns,
* or these may be differed if a netconf is not available yet.
*
* If we are already a member of the network, nothing is done and OK is
* returned.
*
* @param node Node instance
* @param nwid 64-bit ZeroTier network ID
* @param uptr An arbitrary pointer to associate with this network (default: NULL)
* @return OK (0) or error code if a fatal error condition has occurred
*/
ZT_SDK_API enum ZT_ResultCode ZT_Node_join(ZT_Node *node,uint64_t nwid,void *uptr,void *tptr);
/**
* Leave a network
*
* If a port has been configured for this network this will generate a call
* to the port config callback with a NULL second parameter to indicate that
* the port is now deleted.
*
* The uptr parameter is optional and is NULL by default. If it is not NULL,
* the pointer it points to is set to this network's uptr on success.
*
* @param node Node instance
* @param nwid 64-bit network ID
* @param uptr Target pointer is set to uptr (if not NULL)
* @return OK (0) or error code if a fatal error condition has occurred
*/
ZT_SDK_API enum ZT_ResultCode ZT_Node_leave(ZT_Node *node,uint64_t nwid,void **uptr,void *tptr);
/**
* Subscribe to an Ethernet multicast group
*
* ADI stands for additional distinguishing information. This defaults to zero
* and is rarely used. Right now its only use is to enable IPv4 ARP to scale,
* and this must be done.
*
* For IPv4 ARP, the implementation must subscribe to 0xffffffffffff (the
* broadcast address) but with an ADI equal to each IPv4 address in host
* byte order. This converts ARP from a non-scalable broadcast protocol to
* a scalable multicast protocol with perfect address specificity.
*
* If this is not done, ARP will not work reliably.
*
* Multiple calls to subscribe to the same multicast address will have no
* effect. It is perfectly safe to do this.
*
* This does not generate an update call to networkConfigCallback().
*
* @param node Node instance
* @param tptr Thread pointer to pass to functions/callbacks resulting from this call
* @param nwid 64-bit network ID
* @param multicastGroup Ethernet multicast or broadcast MAC (least significant 48 bits)
* @param multicastAdi Multicast ADI (least significant 32 bits only, use 0 if not needed)
* @return OK (0) or error code if a fatal error condition has occurred
*/
ZT_SDK_API enum ZT_ResultCode ZT_Node_multicastSubscribe(ZT_Node *node,void *tptr,uint64_t nwid,uint64_t multicastGroup,unsigned long multicastAdi);
/**
* Unsubscribe from an Ethernet multicast group (or all groups)
*
* If multicastGroup is zero (0), this will unsubscribe from all groups. If
* you are not subscribed to a group this has no effect.
*
* This does not generate an update call to networkConfigCallback().
*
* @param node Node instance
* @param nwid 64-bit network ID
* @param multicastGroup Ethernet multicast or broadcast MAC (least significant 48 bits)
* @param multicastAdi Multicast ADI (least significant 32 bits only, use 0 if not needed)
* @return OK (0) or error code if a fatal error condition has occurred
*/
ZT_SDK_API enum ZT_ResultCode ZT_Node_multicastUnsubscribe(ZT_Node *node,uint64_t nwid,uint64_t multicastGroup,unsigned long multicastAdi);
/**
* Add or update a moon
*
* Moons are persisted in the data store in moons.d/, so this can persist
* across invocations if the contents of moon.d are scanned and orbit is
* called for each on startup.
*
* @param node Node instance
* @param tptr Thread pointer to pass to functions/callbacks resulting from this call
* @param moonWorldId Moon's world ID
* @param moonSeed If non-zero, the ZeroTier address of any member of the moon to query for moon definition
* @param len Length of moonWorld in bytes
* @return Error if moon was invalid or failed to be added
*/
ZT_SDK_API enum ZT_ResultCode ZT_Node_orbit(ZT_Node *node,void *tptr,uint64_t moonWorldId,uint64_t moonSeed);
/**
* Remove a moon (does nothing if not present)
*
* @param node Node instance
* @param tptr Thread pointer to pass to functions/callbacks resulting from this call
* @param moonWorldId World ID of moon to remove
* @return Error if anything bad happened
*/
ZT_SDK_API enum ZT_ResultCode ZT_Node_deorbit(ZT_Node *node,void *tptr,uint64_t moonWorldId);
/**
* Get this node's 40-bit ZeroTier address
*
* @param node Node instance
* @return ZeroTier address (least significant 40 bits of 64-bit int)
*/
ZT_SDK_API uint64_t ZT_Node_address(ZT_Node *node);
/**
* Get the status of this node
*
* @param node Node instance
* @param status Buffer to fill with current node status
*/
ZT_SDK_API void ZT_Node_status(ZT_Node *node,ZT_NodeStatus *status);
/**
* Get a list of known peer nodes
*
* The pointer returned here must be freed with freeQueryResult()
* when you are done with it.
*
* @param node Node instance
* @return List of known peers or NULL on failure
*/
ZT_SDK_API ZT_PeerList *ZT_Node_peers(ZT_Node *node);
/**
* Get the status of a virtual network
*
* The pointer returned here must be freed with freeQueryResult()
* when you are done with it.
*
* @param node Node instance
* @param nwid 64-bit network ID
* @return Network configuration or NULL if we are not a member of this network
*/
ZT_SDK_API ZT_VirtualNetworkConfig *ZT_Node_networkConfig(ZT_Node *node,uint64_t nwid);
/**
* Enumerate and get status of all networks
*
* @param node Node instance
* @return List of networks or NULL on failure
*/
ZT_SDK_API ZT_VirtualNetworkList *ZT_Node_networks(ZT_Node *node);
/**
* Free a query result buffer
*
* Use this to free the return values of listNetworks(), listPeers(), etc.
*
* @param node Node instance
* @param qr Query result buffer
*/
ZT_SDK_API void ZT_Node_freeQueryResult(ZT_Node *node,void *qr);
/**
* Add a local interface address
*
* This is used to make ZeroTier aware of those local interface addresses
* that you wish to use for ZeroTier communication. This is optional, and if
* it is not used ZeroTier will rely upon upstream peers (and roots) to
* perform empirical address discovery and NAT traversal. But the use of this
* method is recommended as it improves peer discovery when both peers are
* on the same LAN.
*
* It is the responsibility of the caller to take care that these are never
* ZeroTier interface addresses, whether these are assigned by ZeroTier or
* are otherwise assigned to an interface managed by this ZeroTier instance.
* This can cause recursion or other undesirable behavior.
*
* This returns a boolean indicating whether or not the address was
* accepted. ZeroTier will only communicate over certain address types
* and (for IP) address classes.
*
* @param addr Local interface address
* @return Boolean: non-zero if address was accepted and added
*/
ZT_SDK_API int ZT_Node_addLocalInterfaceAddress(ZT_Node *node,const struct sockaddr_storage *addr);
/**
* Clear local interface addresses
*/
ZT_SDK_API void ZT_Node_clearLocalInterfaceAddresses(ZT_Node *node);
/**
* Send a VERB_USER_MESSAGE to another ZeroTier node
*
* There is no delivery guarantee here. Failure can occur if the message is
* too large or if dest is not a valid ZeroTier address.
*
* @param node Node instance
* @param tptr Thread pointer to pass to functions/callbacks resulting from this call
* @param dest Destination ZeroTier address
* @param typeId VERB_USER_MESSAGE type ID
* @param data Payload data to attach to user message
* @param len Length of data in bytes
* @return Boolean: non-zero on success, zero on failure
*/
ZT_SDK_API int ZT_Node_sendUserMessage(ZT_Node *node,void *tptr,uint64_t dest,uint64_t typeId,const void *data,unsigned int len);
/**
* Set a network configuration master instance for this node
*
* Normal nodes should not need to use this. This is for nodes with
* special compiled-in support for acting as network configuration
* masters / controllers.
*
* The supplied instance must be a C++ object that inherits from the
* NetworkConfigMaster base class in node/. No type checking is performed,
* so a pointer to anything else will result in a crash.
*
* @param node ZertTier One node
* @param networkConfigMasterInstance Instance of NetworkConfigMaster C++ class or NULL to disable
* @return OK (0) or error code if a fatal error condition has occurred
*/
ZT_SDK_API void ZT_Node_setNetconfMaster(ZT_Node *node,void *networkConfigMasterInstance);
/**
* Set configuration for a given physical path
*
* @param node Node instance
* @param pathNetwork Network/CIDR of path or NULL to clear the cache and reset all paths to default
* @param pathConfig Path configuration or NULL to erase this entry and therefore reset it to NULL
* @return OK or error code
*/
ZT_SDK_API enum ZT_ResultCode ZT_Node_setPhysicalPathConfiguration(ZT_Node *node,const struct sockaddr_storage *pathNetwork,const ZT_PhysicalPathConfiguration *pathConfig);
/**
* Get ZeroTier One version
*
* @param major Result: major version
* @param minor Result: minor version
* @param revision Result: revision
*/
ZT_SDK_API void ZT_version(int *major,int *minor,int *revision);
#ifdef __cplusplus
}
#endif
#endif
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