proto/src/ipconnectivity.proto - platform/frameworks/base - Gitiles

 // LINT: LEGACY_NAMES
 syntax = "proto2";

 package clearcut.connectivity;

 option java_package = "com.android.server.connectivity.metrics";
 option java_outer_classname = "IpConnectivityLogClass";

 // NetworkId represents the id given by the system to a physical network on the
 // Android device. It is used to relates events to each other for devices with
 // multiple networks (WiFi, 4G, ...).
 // Deprecated since version 3, replaced by top-level network_id field in
 // IpConnectivityEvent.
 message NetworkId {
   // Every network gets assigned a network_id on creation based on order of
   // creation. Thus network_id N is assigned to the network created directly
   // after network N-1. Thus there is no PII involved here. Zero means no
   // network. The value 0 is never assigned to a network.
   optional int32 network_id = 1;
 };

 // LinkLayer describes a physical link layer technology used by a network.
 // It is not intended to map one to one to the TRANSPORT_* constants defined in
 // android.net.NetworkCapabilities. Instead it is intended to be used as
 // a dimension field for metrics events and aggregated metrics.
 // Next tag: 7
 enum LinkLayer {
   // An unknown link layer technology.
   UNKNOWN   = 0;

   BLUETOOTH = 1;
   CELLULAR  = 2;
   ETHERNET  = 3;
   WIFI      = 4;

   // Indicates that the link layer dimension is not relevant for the metrics or
   // event considered.
   NONE      = 5;

   // Indicates that the metrics or event considered may involve several links.
   MULTIPLE  = 6;
 };

 // A pair of (key, value) integers for describing histogram-like statistics.
 message Pair {
   optional int32 key = 1;
   optional int32 value = 2;
 };

 // Logs changes in the system default network. Changes can be 1) acquiring a
 // default network with no previous default, 2) a switch of the system default
 // network to a new default network, 3) a loss of the system default network.
 // This message is associated to android.net.metrics.DefaultNetworkEvent.
 message DefaultNetworkEvent {
   // A value of 0 means this is a loss of the system default network.
   optional NetworkId network_id = 1;

   // A value of 0 means there was no previous default network.
   optional NetworkId previous_network_id = 2;

   // Whether the network supports IPv4, IPv6, or both.
   enum IPSupport {
     NONE = 0;
     IPV4 = 1;
     IPV6 = 2;
     DUAL = 3;
   };

   // Best available information about IP support of the previous network when
   // disconnecting or switching to a new default network.
   optional IPSupport previous_network_ip_support = 3;

   // The transport types of the new default network, represented by
   // TRANSPORT_* constants as defined in NetworkCapabilities.
   repeated int32 transport_types = 4;
 };

 // Logs IpReachabilityMonitor probe events and NUD_FAILED events.
 // This message is associated to android.net.metrics.IpReachabilityEvent.
 message IpReachabilityEvent {
   // The interface name (wlan, rmnet, lo, ...) on which the probe was sent.
   // Deprecated since version 2, to be replaced by link_layer field.
   optional string if_name = 1 [deprecated = true];

   // The event type code of the probe, represented by constants defined in
   // android.net.metrics.IpReachabilityEvent.
   // NUD_FAILED_ORGANIC and PROVISIONING_LOST_ORGANIC recorded since version 1.
   optional int32 event_type = 2;
 };

 // Logs NetworkMonitor and ConnectivityService events related to the state of
 // a network: connection, evaluation, validation, lingering, and disconnection.
 // This message is associated to android.net.metrics.NetworkEvent.
 message NetworkEvent {
   // The id of the network on which this event happened.
   // Deprecated since version 3.
   optional NetworkId network_id = 1 [deprecated = true];

   // The type of network event, represented by NETWORK_* constants defined in
   // android.net.metrics.NetworkEvent.
   optional int32 event_type = 2;

   // Only valid after finishing evaluating a network for Internet connectivity.
   // The time it took for this evaluation to complete.
   optional int32 latency_ms = 3;
 }

 // Logs individual captive portal probing events that are performed when
 // evaluating or reevaluating networks for Internet connectivity.
 // This message is associated to android.net.metrics.ValidationProbeEvent.
 message ValidationProbeEvent {
   // The id of the network for which the probe was sent.
   // Deprecated since version 3.
   optional NetworkId network_id = 1 [deprecated = true];

   // The time it took for that probe to complete or time out.
   optional int32 latency_ms = 2;

   // The type of portal probe, represented by PROBE_* constants defined in
   // android.net.metrics.ValidationProbeEvent.
   optional int32 probe_type = 3;

   // The http code result of the probe test.
   optional int32 probe_result = 4;
 }

 // Logs DNS lookup latencies. Repeated fields must have the same length.
 // This message is associated to android.net.metrics.DnsEvent.
 // Deprecated since version 2.
 message DNSLookupBatch {
   // The id of the network on which the DNS lookups took place.
   optional NetworkId network_id = 1;

   // The types of the DNS lookups, as defined in android.net.metrics.DnsEvent.
   repeated int32 event_types = 2;

   // The return values of the DNS resolver for each DNS lookups.
   repeated int32 return_codes = 3;

   // The time it took for each DNS lookups to complete.
   repeated int32 latencies_ms = 4;
 };

 // Represents a collections of DNS lookup latencies and counters for a
 // particular combination of DNS query type and return code.
 // Since version 2.
 message DNSLatencies {
   // The type of the DNS lookups, as defined in android.net.metrics.DnsEvent.
   // Acts as a key for a set of DNS query results.
   // Possible values are: 0 for getaddrinfo, 1 for gethostbyname.
   optional int32 type = 1;

   // The return value of the DNS resolver for the DNS lookups.
   // Acts as a key for a set of DNS query results.
   // Possible values are: 0 for success, or errno code for failures.
   optional int32 return_code = 2;

   // The number of query operations recorded.
   optional int32 query_count = 3;

   // The number of query operations returning A IPv4 records.
   optional int32 a_count = 4;

   // The number of query operations returning AAAA IPv6 records.
   optional int32 aaaa_count = 5;

   // The time it took for each DNS lookup to complete. The number of repeated
   // values can be less than query_count in case of event rate-limiting.
   repeated int32 latencies_ms = 6;
 };

 // Represents latency and errno statistics of the connect() system call.
 // Since version 2.
 // Next tag: 7
 message ConnectStatistics {
   // The number of connect() operations recorded.
   optional int32 connect_count = 1;

   // The number of connect() operations done in blocking mode.
   // Since version 3.
   optional int32 connect_blocking_count = 5;

   // The number of connect() operations with IPv6 socket address.
   optional int32 ipv6_addr_count = 2;

   // The time it took for successful blocking connect() operations to complete
   // The number of repeated values can be less than connect_blocking_count in
   // case of event rate-limiting.
   repeated int32 latencies_ms = 3;

   // The time it took for successful connect() operation to complete in
   // non-blocking mode. The number of repeated values can be less than
   // connect_count - connect_blocking_count in case of event rate-limiting.
   repeated int32 non_blocking_latencies_ms = 6;

   // Counts of all error values returned by failed connect() operations.
   // The Pair key field is the errno code. The Pair value field is the count
   // for that errno code.
   repeated Pair errnos_counters = 4;
 };

 // Represents a DHCP event on a single interface, which can be a DHCPClient
 // state transition or a response packet parsing error.
 // This message is associated to android.net.metrics.DhcpClientEvent and
 // android.net.metrics.DhcpErrorEvent.
 message DHCPEvent {
   // The interface name (wlan, rmnet, lo, ...) on which the event happened.
   // Deprecated since version 2, to be replaced by link_layer field.
   optional string if_name = 1 [deprecated = true];

   oneof value {
     // The name of a state in the DhcpClient state machine, represented by
     // the inner classes of android.net.dhcp.DhcpClient.
     string state_transition = 2;

     // The error code of a DHCP error, represented by constants defined in
     // android.net.metrics.DhcpErrorEvent.
     int32 error_code = 3;
   }

   // Lifetime duration in milliseconds of a DhcpClient state, or transition
   // time in milliseconds between specific pairs of DhcpClient's states.
   // Only populated since version 1, when state_transition is populated.
   optional int32 duration_ms = 4;
 }

 // Represents the generation of an Android Packet Filter program.
 // Since version 1.
 // Next tag: 8
 message ApfProgramEvent {
   // Maximum lifetime of the program in seconds.
   optional int64 lifetime = 1;

   // Effective lifetime of the program in seconds from the time the
   // program was installed to the time it was replaced or removed.
   optional int64 effective_lifetime = 7;

   // Number of RAs filtered by the APF program.
   optional int32 filtered_ras = 2;

   // Total number of RAs to filter currently tracked by ApfFilter. Can be more
   // than filtered_ras if all available program size was exhausted.
   optional int32 current_ras = 3;

   // Length of the APF program in bytes.
   optional int32 program_length = 4;

   // True if the APF program is dropping multicast and broadcast traffic.
   optional bool drop_multicast = 5;

   // True if the interface on which APF runs has an IPv4 address.
   optional bool has_ipv4_addr = 6;
 }

 // Represents Router Advertisement listening statistics for an interface with
 // Android Packet Filter enabled.
 // Since version 1.
 // Next tag: 12
 message ApfStatistics {
   // The time interval in milliseconds these stastistics cover.
   optional int64 duration_ms = 1;

   // The total number of received RAs.
   optional int32 received_ras = 2;

   // The total number of received RAs that matched a known RA.
   optional int32 matching_ras = 3;

   // The total number of received RAs ignored due to the MAX_RAS limit.
   optional int32 dropped_ras = 5;

   // The total number of received RAs with an effective lifetime of 0 seconds.
   // Effective lifetime for APF is the minimum of all lifetimes in a RA.
   optional int32 zero_lifetime_ras = 6;

   // The total number of received RAs that could not be parsed.
   optional int32 parse_errors = 7;

   // The total number of APF program updates triggered by an RA reception.
   optional int32 program_updates = 8;

   // The maximum APF program size in byte advertised by hardware.
   optional int32 max_program_size = 9;

   // The total number of successful APF program updates triggered by any state
   // change in ApfFilter. Since version 3.
   optional int32 program_updates_all = 10;

   // The total number of APF program updates triggered when disabling the
   // multicast filter. Since version 3.
   optional int32 program_updates_allowing_multicast = 11;
 }

 // Represents the reception of a Router Advertisement packet for an interface
 // with Android Packet Filter enabled.
 // Since version 1.
 message RaEvent {
   // All lifetime values are expressed in seconds. The default value for an
   // option lifetime that was not present in the RA option list is -1.
   // The lifetime of an option (e.g., the Prefix Information Option) is the
   // minimum lifetime of all such options in the packet.

   // The value of the router lifetime in the RA packet.
   optional int64 router_lifetime = 1;

   // Prefix valid lifetime from the prefix information option.
   optional int64 prefix_valid_lifetime = 2;

   // Prefix preferred lifetime from the prefix information option.
   optional int64 prefix_preferred_lifetime = 3;

   // Route info lifetime.
   optional int64 route_info_lifetime = 4;

   // Recursive DNS server lifetime.
   optional int64 rdnss_lifetime = 5;

   // DNS search list lifetime.
   optional int64 dnssl_lifetime = 6;
 }

 // Represents an IP provisioning event in IpManager and how long the
 // provisioning action took.
 // This message is associated to android.net.metrics.IpManagerEvent.
 message IpProvisioningEvent {
   // The interface name (wlan, rmnet, lo, ...) on which the probe was sent.
   // Deprecated since version 2, to be replaced by link_layer field.
   optional string if_name = 1 [deprecated = true];

   // The code of the IP provisioning event, represented by constants defined in
   // android.net.metrics.IpManagerEvent.
   optional int32 event_type = 2;

   // The duration of the provisioning action that resulted in this event.
   optional int32 latency_ms = 3;
 }

 // Represents one of the IP connectivity event defined in this file.
 // Next tag: 19
 message IpConnectivityEvent {
   // Time in ms when the event was recorded.
   optional int64 time_ms = 1;

   // Physical link layer of the network on which the event happened.
   // Acts as a dimension key.
   // Since version 2.
   optional LinkLayer link_layer = 15;

   // Represents the id given by the system to a physical network on the device.
   // Every network gets assigned a unique id on creation from a monotonic
   // counter. The value 0 is never assigned to a network and means no network.
   // It is used to correlate different types of events to each other for devices
   // with multiple networks (WiFi, 4G, ...).
   // Since version 3.
   optional int32 network_id = 16;

   // The interface name (wlan, rmnet, lo, ...) on which the event happened.
   // Present if the link_layer field was not inferred from the if_name on
   // the device, so that post-processing of the serialized proto can backfill
   // link_layer. Since version 3.
   optional string if_name = 17;

   // The transport types of the network on which the event happened, expressed
   // as a bit field of TRANSPORT_* constants as defined in NetworkCapabilities.
   // Present if the link_layer field was not inferred from the transport types,
   // so that post-processing of the serialized proto can backfill link_layer
   // Since version 3.
   optional int64 transports = 18;

   oneof event {

     // An event about the system default network.
     // The link_layer field is not relevant for this event and set to NONE.
     DefaultNetworkEvent default_network_event = 2;

     // An IP reachability probe event.
     IpReachabilityEvent ip_reachability_event = 3;

     // A network lifecycle event.
     NetworkEvent network_event = 4;

     // A batch of DNS lookups.
     // Deprecated in the nyc-mr2 release since version 2,and replaced by
     // dns_latencies.
     DNSLookupBatch dns_lookup_batch = 5 [deprecated = true];

     // DNS lookup latency statistics.
     DNSLatencies dns_latencies = 13;

     // Connect latency and errno statistics.
     ConnectStatistics connect_statistics = 14;

     // A DHCP client event or DHCP receive error.
     DHCPEvent dhcp_event = 6;

     // An IP provisioning event.
     IpProvisioningEvent ip_provisioning_event = 7;

     // A network validation probe event.
     ValidationProbeEvent validation_probe_event = 8;

     // An Android Packet Filter program event.
     ApfProgramEvent apf_program_event = 9;

     // An Android Packet Filter statistics event.
     ApfStatistics apf_statistics = 10;

     // An RA packet reception event.
     RaEvent ra_event = 11;
   };
 };

 // The information about IP connectivity events.
 message IpConnectivityLog {
   // An array of IP connectivity events.
   repeated IpConnectivityEvent events = 1;

   // The number of events that had to be dropped due to a full buffer.
   optional int32 dropped_events = 2;

   // The version number of the metrics events being collected.
   //  nyc:     not populated, implicitly 0.
   //  nyc-dr1: not populated, implicitly 1 (sailfish and marlin only).
   //  nyc-mr1: not populated, implicitly 1.
   //  nyc-mr2: 2.
   //  oc:      3.
   optional int32 version = 3;
 };
	// LINT: LEGACY_NAMES
	syntax = "proto2";

	package clearcut.connectivity;

	option java_package = "com.android.server.connectivity.metrics";
	option java_outer_classname = "IpConnectivityLogClass";

	// NetworkId represents the id given by the system to a physical network on the
	// Android device. It is used to relates events to each other for devices with
	// multiple networks (WiFi, 4G, ...).
	// Deprecated since version 3, replaced by top-level network_id field in
	// IpConnectivityEvent.
	message NetworkId {
	// Every network gets assigned a network_id on creation based on order of
	// creation. Thus network_id N is assigned to the network created directly
	// after network N-1. Thus there is no PII involved here. Zero means no
	// network. The value 0 is never assigned to a network.
	optional int32 network_id = 1;
	};

	// LinkLayer describes a physical link layer technology used by a network.
	// It is not intended to map one to one to the TRANSPORT_* constants defined in
	// android.net.NetworkCapabilities. Instead it is intended to be used as
	// a dimension field for metrics events and aggregated metrics.
	// Next tag: 7
	enum LinkLayer {
	// An unknown link layer technology.
	UNKNOWN = 0;

	BLUETOOTH = 1;
	CELLULAR = 2;
	ETHERNET = 3;
	WIFI = 4;

	// Indicates that the link layer dimension is not relevant for the metrics or
	// event considered.
	NONE = 5;

	// Indicates that the metrics or event considered may involve several links.
	MULTIPLE = 6;
	};

	// A pair of (key, value) integers for describing histogram-like statistics.
	message Pair {
	optional int32 key = 1;
	optional int32 value = 2;
	};

	// Logs changes in the system default network. Changes can be 1) acquiring a
	// default network with no previous default, 2) a switch of the system default
	// network to a new default network, 3) a loss of the system default network.
	// This message is associated to android.net.metrics.DefaultNetworkEvent.
	message DefaultNetworkEvent {
	// A value of 0 means this is a loss of the system default network.
	optional NetworkId network_id = 1;

	// A value of 0 means there was no previous default network.
	optional NetworkId previous_network_id = 2;

	// Whether the network supports IPv4, IPv6, or both.
	enum IPSupport {
	NONE = 0;
	IPV4 = 1;
	IPV6 = 2;
	DUAL = 3;
	};

	// Best available information about IP support of the previous network when
	// disconnecting or switching to a new default network.
	optional IPSupport previous_network_ip_support = 3;

	// The transport types of the new default network, represented by
	// TRANSPORT_* constants as defined in NetworkCapabilities.
	repeated int32 transport_types = 4;
	};

	// Logs IpReachabilityMonitor probe events and NUD_FAILED events.
	// This message is associated to android.net.metrics.IpReachabilityEvent.
	message IpReachabilityEvent {
	// The interface name (wlan, rmnet, lo, ...) on which the probe was sent.
	// Deprecated since version 2, to be replaced by link_layer field.
	optional string if_name = 1 [deprecated = true];

	// The event type code of the probe, represented by constants defined in
	// android.net.metrics.IpReachabilityEvent.
	// NUD_FAILED_ORGANIC and PROVISIONING_LOST_ORGANIC recorded since version 1.
	optional int32 event_type = 2;
	};

	// Logs NetworkMonitor and ConnectivityService events related to the state of
	// a network: connection, evaluation, validation, lingering, and disconnection.
	// This message is associated to android.net.metrics.NetworkEvent.
	message NetworkEvent {
	// The id of the network on which this event happened.
	// Deprecated since version 3.
	optional NetworkId network_id = 1 [deprecated = true];

	// The type of network event, represented by NETWORK_* constants defined in
	// android.net.metrics.NetworkEvent.
	optional int32 event_type = 2;

	// Only valid after finishing evaluating a network for Internet connectivity.
	// The time it took for this evaluation to complete.
	optional int32 latency_ms = 3;
	}

	// Logs individual captive portal probing events that are performed when
	// evaluating or reevaluating networks for Internet connectivity.
	// This message is associated to android.net.metrics.ValidationProbeEvent.
	message ValidationProbeEvent {
	// The id of the network for which the probe was sent.
	// Deprecated since version 3.
	optional NetworkId network_id = 1 [deprecated = true];

	// The time it took for that probe to complete or time out.
	optional int32 latency_ms = 2;

	// The type of portal probe, represented by PROBE_* constants defined in
	// android.net.metrics.ValidationProbeEvent.
	optional int32 probe_type = 3;

	// The http code result of the probe test.
	optional int32 probe_result = 4;
	}

	// Logs DNS lookup latencies. Repeated fields must have the same length.
	// This message is associated to android.net.metrics.DnsEvent.
	// Deprecated since version 2.
	message DNSLookupBatch {
	// The id of the network on which the DNS lookups took place.
	optional NetworkId network_id = 1;

	// The types of the DNS lookups, as defined in android.net.metrics.DnsEvent.
	repeated int32 event_types = 2;

	// The return values of the DNS resolver for each DNS lookups.
	repeated int32 return_codes = 3;

	// The time it took for each DNS lookups to complete.
	repeated int32 latencies_ms = 4;
	};

	// Represents a collections of DNS lookup latencies and counters for a
	// particular combination of DNS query type and return code.
	// Since version 2.
	message DNSLatencies {
	// The type of the DNS lookups, as defined in android.net.metrics.DnsEvent.
	// Acts as a key for a set of DNS query results.
	// Possible values are: 0 for getaddrinfo, 1 for gethostbyname.
	optional int32 type = 1;

	// The return value of the DNS resolver for the DNS lookups.
	// Acts as a key for a set of DNS query results.
	// Possible values are: 0 for success, or errno code for failures.
	optional int32 return_code = 2;

	// The number of query operations recorded.
	optional int32 query_count = 3;

	// The number of query operations returning A IPv4 records.
	optional int32 a_count = 4;

	// The number of query operations returning AAAA IPv6 records.
	optional int32 aaaa_count = 5;

	// The time it took for each DNS lookup to complete. The number of repeated
	// values can be less than query_count in case of event rate-limiting.
	repeated int32 latencies_ms = 6;
	};

	// Represents latency and errno statistics of the connect() system call.
	// Since version 2.
	// Next tag: 7
	message ConnectStatistics {
	// The number of connect() operations recorded.
	optional int32 connect_count = 1;

	// The number of connect() operations done in blocking mode.
	// Since version 3.
	optional int32 connect_blocking_count = 5;

	// The number of connect() operations with IPv6 socket address.
	optional int32 ipv6_addr_count = 2;

	// The time it took for successful blocking connect() operations to complete
	// The number of repeated values can be less than connect_blocking_count in
	// case of event rate-limiting.
	repeated int32 latencies_ms = 3;

	// The time it took for successful connect() operation to complete in
	// non-blocking mode. The number of repeated values can be less than
	// connect_count - connect_blocking_count in case of event rate-limiting.
	repeated int32 non_blocking_latencies_ms = 6;

	// Counts of all error values returned by failed connect() operations.
	// The Pair key field is the errno code. The Pair value field is the count
	// for that errno code.
	repeated Pair errnos_counters = 4;
	};

	// Represents a DHCP event on a single interface, which can be a DHCPClient
	// state transition or a response packet parsing error.
	// This message is associated to android.net.metrics.DhcpClientEvent and
	// android.net.metrics.DhcpErrorEvent.
	message DHCPEvent {
	// The interface name (wlan, rmnet, lo, ...) on which the event happened.
	// Deprecated since version 2, to be replaced by link_layer field.
	optional string if_name = 1 [deprecated = true];

	oneof value {
	// The name of a state in the DhcpClient state machine, represented by
	// the inner classes of android.net.dhcp.DhcpClient.
	string state_transition = 2;

	// The error code of a DHCP error, represented by constants defined in
	// android.net.metrics.DhcpErrorEvent.
	int32 error_code = 3;
	}

	// Lifetime duration in milliseconds of a DhcpClient state, or transition
	// time in milliseconds between specific pairs of DhcpClient's states.
	// Only populated since version 1, when state_transition is populated.
	optional int32 duration_ms = 4;
	}

	// Represents the generation of an Android Packet Filter program.
	// Since version 1.
	// Next tag: 8
	message ApfProgramEvent {
	// Maximum lifetime of the program in seconds.
	optional int64 lifetime = 1;

	// Effective lifetime of the program in seconds from the time the
	// program was installed to the time it was replaced or removed.
	optional int64 effective_lifetime = 7;

	// Number of RAs filtered by the APF program.
	optional int32 filtered_ras = 2;

	// Total number of RAs to filter currently tracked by ApfFilter. Can be more
	// than filtered_ras if all available program size was exhausted.
	optional int32 current_ras = 3;

	// Length of the APF program in bytes.
	optional int32 program_length = 4;

	// True if the APF program is dropping multicast and broadcast traffic.
	optional bool drop_multicast = 5;

	// True if the interface on which APF runs has an IPv4 address.
	optional bool has_ipv4_addr = 6;
	}

	// Represents Router Advertisement listening statistics for an interface with
	// Android Packet Filter enabled.
	// Since version 1.
	// Next tag: 12
	message ApfStatistics {
	// The time interval in milliseconds these stastistics cover.
	optional int64 duration_ms = 1;

	// The total number of received RAs.
	optional int32 received_ras = 2;

	// The total number of received RAs that matched a known RA.
	optional int32 matching_ras = 3;

	// The total number of received RAs ignored due to the MAX_RAS limit.
	optional int32 dropped_ras = 5;

	// The total number of received RAs with an effective lifetime of 0 seconds.
	// Effective lifetime for APF is the minimum of all lifetimes in a RA.
	optional int32 zero_lifetime_ras = 6;

	// The total number of received RAs that could not be parsed.
	optional int32 parse_errors = 7;

	// The total number of APF program updates triggered by an RA reception.
	optional int32 program_updates = 8;

	// The maximum APF program size in byte advertised by hardware.
	optional int32 max_program_size = 9;

	// The total number of successful APF program updates triggered by any state
	// change in ApfFilter. Since version 3.
	optional int32 program_updates_all = 10;

	// The total number of APF program updates triggered when disabling the
	// multicast filter. Since version 3.
	optional int32 program_updates_allowing_multicast = 11;
	}

	// Represents the reception of a Router Advertisement packet for an interface
	// with Android Packet Filter enabled.
	// Since version 1.
	message RaEvent {
	// All lifetime values are expressed in seconds. The default value for an
	// option lifetime that was not present in the RA option list is -1.
	// The lifetime of an option (e.g., the Prefix Information Option) is the
	// minimum lifetime of all such options in the packet.

	// The value of the router lifetime in the RA packet.
	optional int64 router_lifetime = 1;

	// Prefix valid lifetime from the prefix information option.
	optional int64 prefix_valid_lifetime = 2;

	// Prefix preferred lifetime from the prefix information option.
	optional int64 prefix_preferred_lifetime = 3;

	// Route info lifetime.
	optional int64 route_info_lifetime = 4;

	// Recursive DNS server lifetime.
	optional int64 rdnss_lifetime = 5;

	// DNS search list lifetime.
	optional int64 dnssl_lifetime = 6;
	}

	// Represents an IP provisioning event in IpManager and how long the
	// provisioning action took.
	// This message is associated to android.net.metrics.IpManagerEvent.
	message IpProvisioningEvent {
	// The interface name (wlan, rmnet, lo, ...) on which the probe was sent.
	// Deprecated since version 2, to be replaced by link_layer field.
	optional string if_name = 1 [deprecated = true];

	// The code of the IP provisioning event, represented by constants defined in
	// android.net.metrics.IpManagerEvent.
	optional int32 event_type = 2;

	// The duration of the provisioning action that resulted in this event.
	optional int32 latency_ms = 3;
	}

	// Represents one of the IP connectivity event defined in this file.
	// Next tag: 19
	message IpConnectivityEvent {
	// Time in ms when the event was recorded.
	optional int64 time_ms = 1;

	// Physical link layer of the network on which the event happened.
	// Acts as a dimension key.
	// Since version 2.
	optional LinkLayer link_layer = 15;

	// Represents the id given by the system to a physical network on the device.
	// Every network gets assigned a unique id on creation from a monotonic
	// counter. The value 0 is never assigned to a network and means no network.
	// It is used to correlate different types of events to each other for devices
	// with multiple networks (WiFi, 4G, ...).
	// Since version 3.
	optional int32 network_id = 16;

	// The interface name (wlan, rmnet, lo, ...) on which the event happened.
	// Present if the link_layer field was not inferred from the if_name on
	// the device, so that post-processing of the serialized proto can backfill
	// link_layer. Since version 3.
	optional string if_name = 17;

	// The transport types of the network on which the event happened, expressed
	// as a bit field of TRANSPORT_* constants as defined in NetworkCapabilities.
	// Present if the link_layer field was not inferred from the transport types,
	// so that post-processing of the serialized proto can backfill link_layer
	// Since version 3.
	optional int64 transports = 18;

	oneof event {

	// An event about the system default network.
	// The link_layer field is not relevant for this event and set to NONE.
	DefaultNetworkEvent default_network_event = 2;

	// An IP reachability probe event.
	IpReachabilityEvent ip_reachability_event = 3;

	// A network lifecycle event.
	NetworkEvent network_event = 4;

	// A batch of DNS lookups.
	// Deprecated in the nyc-mr2 release since version 2,and replaced by
	// dns_latencies.
	DNSLookupBatch dns_lookup_batch = 5 [deprecated = true];

	// DNS lookup latency statistics.
	DNSLatencies dns_latencies = 13;

	// Connect latency and errno statistics.
	ConnectStatistics connect_statistics = 14;

	// A DHCP client event or DHCP receive error.
	DHCPEvent dhcp_event = 6;

	// An IP provisioning event.
	IpProvisioningEvent ip_provisioning_event = 7;

	// A network validation probe event.
	ValidationProbeEvent validation_probe_event = 8;

	// An Android Packet Filter program event.
	ApfProgramEvent apf_program_event = 9;

	// An Android Packet Filter statistics event.
	ApfStatistics apf_statistics = 10;

	// An RA packet reception event.
	RaEvent ra_event = 11;
	};
	};

	// The information about IP connectivity events.
	message IpConnectivityLog {
	// An array of IP connectivity events.
	repeated IpConnectivityEvent events = 1;

	// The number of events that had to be dropped due to a full buffer.
	optional int32 dropped_events = 2;

	// The version number of the metrics events being collected.
	// nyc: not populated, implicitly 0.
	// nyc-dr1: not populated, implicitly 1 (sailfish and marlin only).
	// nyc-mr1: not populated, implicitly 1.
	// nyc-mr2: 2.
	// oc: 3.
	optional int32 version = 3;
	};