2731 lines
86 KiB
Go
2731 lines
86 KiB
Go
// Copyright 2018 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Package netstack provides an implementation of the socket.Socket interface
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// that is backed by a tcpip.Endpoint.
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//
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// It does not depend on any particular endpoint implementation, and thus can
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// be used to expose certain endpoints to the sentry while leaving others out,
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// for example, TCP endpoints and Unix-domain endpoints.
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//
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// Lock ordering: netstack => mm: ioSequencePayload copies user memory inside
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// tcpip.Endpoint.Write(). Netstack is allowed to (and does) hold locks during
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// this operation.
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package netstack
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import (
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"bytes"
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"io"
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"math"
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"reflect"
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"sync"
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"syscall"
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"time"
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"gvisor.dev/gvisor/pkg/abi/linux"
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"gvisor.dev/gvisor/pkg/binary"
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"gvisor.dev/gvisor/pkg/log"
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"gvisor.dev/gvisor/pkg/metric"
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"gvisor.dev/gvisor/pkg/sentry/arch"
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"gvisor.dev/gvisor/pkg/sentry/context"
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"gvisor.dev/gvisor/pkg/sentry/fs"
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"gvisor.dev/gvisor/pkg/sentry/fs/fsutil"
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"gvisor.dev/gvisor/pkg/sentry/inet"
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"gvisor.dev/gvisor/pkg/sentry/kernel"
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ktime "gvisor.dev/gvisor/pkg/sentry/kernel/time"
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"gvisor.dev/gvisor/pkg/sentry/safemem"
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"gvisor.dev/gvisor/pkg/sentry/socket"
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"gvisor.dev/gvisor/pkg/sentry/socket/netfilter"
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"gvisor.dev/gvisor/pkg/sentry/unimpl"
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"gvisor.dev/gvisor/pkg/sentry/usermem"
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"gvisor.dev/gvisor/pkg/syserr"
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"gvisor.dev/gvisor/pkg/syserror"
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"gvisor.dev/gvisor/pkg/tcpip"
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"gvisor.dev/gvisor/pkg/tcpip/buffer"
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"gvisor.dev/gvisor/pkg/tcpip/stack"
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"gvisor.dev/gvisor/pkg/tcpip/transport/tcp"
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"gvisor.dev/gvisor/pkg/tcpip/transport/udp"
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"gvisor.dev/gvisor/pkg/waiter"
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)
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func mustCreateMetric(name, description string) *tcpip.StatCounter {
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var cm tcpip.StatCounter
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metric.MustRegisterCustomUint64Metric(name, false /* sync */, description, cm.Value)
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return &cm
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}
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// Metrics contains metrics exported by netstack.
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var Metrics = tcpip.Stats{
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UnknownProtocolRcvdPackets: mustCreateMetric("/netstack/unknown_protocol_received_packets", "Number of packets received by netstack that were for an unknown or unsupported protocol."),
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MalformedRcvdPackets: mustCreateMetric("/netstack/malformed_received_packets", "Number of packets received by netstack that were deemed malformed."),
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DroppedPackets: mustCreateMetric("/netstack/dropped_packets", "Number of packets dropped by netstack due to full queues."),
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ICMP: tcpip.ICMPStats{
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V4PacketsSent: tcpip.ICMPv4SentPacketStats{
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ICMPv4PacketStats: tcpip.ICMPv4PacketStats{
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Echo: mustCreateMetric("/netstack/icmp/v4/packets_sent/echo", "Total number of ICMPv4 echo packets sent by netstack."),
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EchoReply: mustCreateMetric("/netstack/icmp/v4/packets_sent/echo_reply", "Total number of ICMPv4 echo reply packets sent by netstack."),
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DstUnreachable: mustCreateMetric("/netstack/icmp/v4/packets_sent/dst_unreachable", "Total number of ICMPv4 destination unreachable packets sent by netstack."),
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SrcQuench: mustCreateMetric("/netstack/icmp/v4/packets_sent/src_quench", "Total number of ICMPv4 source quench packets sent by netstack."),
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Redirect: mustCreateMetric("/netstack/icmp/v4/packets_sent/redirect", "Total number of ICMPv4 redirect packets sent by netstack."),
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TimeExceeded: mustCreateMetric("/netstack/icmp/v4/packets_sent/time_exceeded", "Total number of ICMPv4 time exceeded packets sent by netstack."),
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ParamProblem: mustCreateMetric("/netstack/icmp/v4/packets_sent/param_problem", "Total number of ICMPv4 parameter problem packets sent by netstack."),
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Timestamp: mustCreateMetric("/netstack/icmp/v4/packets_sent/timestamp", "Total number of ICMPv4 timestamp packets sent by netstack."),
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TimestampReply: mustCreateMetric("/netstack/icmp/v4/packets_sent/timestamp_reply", "Total number of ICMPv4 timestamp reply packets sent by netstack."),
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InfoRequest: mustCreateMetric("/netstack/icmp/v4/packets_sent/info_request", "Total number of ICMPv4 information request packets sent by netstack."),
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InfoReply: mustCreateMetric("/netstack/icmp/v4/packets_sent/info_reply", "Total number of ICMPv4 information reply packets sent by netstack."),
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},
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Dropped: mustCreateMetric("/netstack/icmp/v4/packets_sent/dropped", "Total number of ICMPv4 packets dropped by netstack due to link layer errors."),
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},
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V4PacketsReceived: tcpip.ICMPv4ReceivedPacketStats{
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ICMPv4PacketStats: tcpip.ICMPv4PacketStats{
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Echo: mustCreateMetric("/netstack/icmp/v4/packets_received/echo", "Total number of ICMPv4 echo packets received by netstack."),
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EchoReply: mustCreateMetric("/netstack/icmp/v4/packets_received/echo_reply", "Total number of ICMPv4 echo reply packets received by netstack."),
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DstUnreachable: mustCreateMetric("/netstack/icmp/v4/packets_received/dst_unreachable", "Total number of ICMPv4 destination unreachable packets received by netstack."),
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SrcQuench: mustCreateMetric("/netstack/icmp/v4/packets_received/src_quench", "Total number of ICMPv4 source quench packets received by netstack."),
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Redirect: mustCreateMetric("/netstack/icmp/v4/packets_received/redirect", "Total number of ICMPv4 redirect packets received by netstack."),
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TimeExceeded: mustCreateMetric("/netstack/icmp/v4/packets_received/time_exceeded", "Total number of ICMPv4 time exceeded packets received by netstack."),
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ParamProblem: mustCreateMetric("/netstack/icmp/v4/packets_received/param_problem", "Total number of ICMPv4 parameter problem packets received by netstack."),
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Timestamp: mustCreateMetric("/netstack/icmp/v4/packets_received/timestamp", "Total number of ICMPv4 timestamp packets received by netstack."),
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TimestampReply: mustCreateMetric("/netstack/icmp/v4/packets_received/timestamp_reply", "Total number of ICMPv4 timestamp reply packets received by netstack."),
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InfoRequest: mustCreateMetric("/netstack/icmp/v4/packets_received/info_request", "Total number of ICMPv4 information request packets received by netstack."),
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InfoReply: mustCreateMetric("/netstack/icmp/v4/packets_received/info_reply", "Total number of ICMPv4 information reply packets received by netstack."),
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},
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Invalid: mustCreateMetric("/netstack/icmp/v4/packets_received/invalid", "Total number of ICMPv4 packets received that the transport layer could not parse."),
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},
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V6PacketsSent: tcpip.ICMPv6SentPacketStats{
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ICMPv6PacketStats: tcpip.ICMPv6PacketStats{
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EchoRequest: mustCreateMetric("/netstack/icmp/v6/packets_sent/echo_request", "Total number of ICMPv6 echo request packets sent by netstack."),
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EchoReply: mustCreateMetric("/netstack/icmp/v6/packets_sent/echo_reply", "Total number of ICMPv6 echo reply packets sent by netstack."),
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DstUnreachable: mustCreateMetric("/netstack/icmp/v6/packets_sent/dst_unreachable", "Total number of ICMPv6 destination unreachable packets sent by netstack."),
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PacketTooBig: mustCreateMetric("/netstack/icmp/v6/packets_sent/packet_too_big", "Total number of ICMPv6 packet too big packets sent by netstack."),
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TimeExceeded: mustCreateMetric("/netstack/icmp/v6/packets_sent/time_exceeded", "Total number of ICMPv6 time exceeded packets sent by netstack."),
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ParamProblem: mustCreateMetric("/netstack/icmp/v6/packets_sent/param_problem", "Total number of ICMPv6 parameter problem packets sent by netstack."),
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RouterSolicit: mustCreateMetric("/netstack/icmp/v6/packets_sent/router_solicit", "Total number of ICMPv6 router solicit packets sent by netstack."),
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RouterAdvert: mustCreateMetric("/netstack/icmp/v6/packets_sent/router_advert", "Total number of ICMPv6 router advert packets sent by netstack."),
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NeighborSolicit: mustCreateMetric("/netstack/icmp/v6/packets_sent/neighbor_solicit", "Total number of ICMPv6 neighbor solicit packets sent by netstack."),
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NeighborAdvert: mustCreateMetric("/netstack/icmp/v6/packets_sent/neighbor_advert", "Total number of ICMPv6 neighbor advert packets sent by netstack."),
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RedirectMsg: mustCreateMetric("/netstack/icmp/v6/packets_sent/redirect_msg", "Total number of ICMPv6 redirect message packets sent by netstack."),
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},
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Dropped: mustCreateMetric("/netstack/icmp/v6/packets_sent/dropped", "Total number of ICMPv6 packets dropped by netstack due to link layer errors."),
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},
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V6PacketsReceived: tcpip.ICMPv6ReceivedPacketStats{
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ICMPv6PacketStats: tcpip.ICMPv6PacketStats{
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EchoRequest: mustCreateMetric("/netstack/icmp/v6/packets_received/echo_request", "Total number of ICMPv6 echo request packets received by netstack."),
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EchoReply: mustCreateMetric("/netstack/icmp/v6/packets_received/echo_reply", "Total number of ICMPv6 echo reply packets received by netstack."),
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DstUnreachable: mustCreateMetric("/netstack/icmp/v6/packets_received/dst_unreachable", "Total number of ICMPv6 destination unreachable packets received by netstack."),
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PacketTooBig: mustCreateMetric("/netstack/icmp/v6/packets_received/packet_too_big", "Total number of ICMPv6 packet too big packets received by netstack."),
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TimeExceeded: mustCreateMetric("/netstack/icmp/v6/packets_received/time_exceeded", "Total number of ICMPv6 time exceeded packets received by netstack."),
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ParamProblem: mustCreateMetric("/netstack/icmp/v6/packets_received/param_problem", "Total number of ICMPv6 parameter problem packets received by netstack."),
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RouterSolicit: mustCreateMetric("/netstack/icmp/v6/packets_received/router_solicit", "Total number of ICMPv6 router solicit packets received by netstack."),
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RouterAdvert: mustCreateMetric("/netstack/icmp/v6/packets_received/router_advert", "Total number of ICMPv6 router advert packets received by netstack."),
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NeighborSolicit: mustCreateMetric("/netstack/icmp/v6/packets_received/neighbor_solicit", "Total number of ICMPv6 neighbor solicit packets received by netstack."),
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NeighborAdvert: mustCreateMetric("/netstack/icmp/v6/packets_received/neighbor_advert", "Total number of ICMPv6 neighbor advert packets received by netstack."),
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RedirectMsg: mustCreateMetric("/netstack/icmp/v6/packets_received/redirect_msg", "Total number of ICMPv6 redirect message packets received by netstack."),
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},
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Invalid: mustCreateMetric("/netstack/icmp/v6/packets_received/invalid", "Total number of ICMPv6 packets received that the transport layer could not parse."),
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},
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},
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IP: tcpip.IPStats{
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PacketsReceived: mustCreateMetric("/netstack/ip/packets_received", "Total number of IP packets received from the link layer in nic.DeliverNetworkPacket."),
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InvalidAddressesReceived: mustCreateMetric("/netstack/ip/invalid_addresses_received", "Total number of IP packets received with an unknown or invalid destination address."),
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PacketsDelivered: mustCreateMetric("/netstack/ip/packets_delivered", "Total number of incoming IP packets that are successfully delivered to the transport layer via HandlePacket."),
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PacketsSent: mustCreateMetric("/netstack/ip/packets_sent", "Total number of IP packets sent via WritePacket."),
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OutgoingPacketErrors: mustCreateMetric("/netstack/ip/outgoing_packet_errors", "Total number of IP packets which failed to write to a link-layer endpoint."),
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MalformedPacketsReceived: mustCreateMetric("/netstack/ip/malformed_packets_received", "Total number of IP packets which failed IP header validation checks."),
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MalformedFragmentsReceived: mustCreateMetric("/netstack/ip/malformed_fragments_received", "Total number of IP fragments which failed IP fragment validation checks."),
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},
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TCP: tcpip.TCPStats{
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ActiveConnectionOpenings: mustCreateMetric("/netstack/tcp/active_connection_openings", "Number of connections opened successfully via Connect."),
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PassiveConnectionOpenings: mustCreateMetric("/netstack/tcp/passive_connection_openings", "Number of connections opened successfully via Listen."),
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ListenOverflowSynDrop: mustCreateMetric("/netstack/tcp/listen_overflow_syn_drop", "Number of times the listen queue overflowed and a SYN was dropped."),
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ListenOverflowAckDrop: mustCreateMetric("/netstack/tcp/listen_overflow_ack_drop", "Number of times the listen queue overflowed and the final ACK in the handshake was dropped."),
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ListenOverflowSynCookieSent: mustCreateMetric("/netstack/tcp/listen_overflow_syn_cookie_sent", "Number of times a SYN cookie was sent."),
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ListenOverflowSynCookieRcvd: mustCreateMetric("/netstack/tcp/listen_overflow_syn_cookie_rcvd", "Number of times a SYN cookie was received."),
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ListenOverflowInvalidSynCookieRcvd: mustCreateMetric("/netstack/tcp/listen_overflow_invalid_syn_cookie_rcvd", "Number of times an invalid SYN cookie was received."),
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FailedConnectionAttempts: mustCreateMetric("/netstack/tcp/failed_connection_attempts", "Number of calls to Connect or Listen (active and passive openings, respectively) that end in an error."),
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ValidSegmentsReceived: mustCreateMetric("/netstack/tcp/valid_segments_received", "Number of TCP segments received that the transport layer successfully parsed."),
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InvalidSegmentsReceived: mustCreateMetric("/netstack/tcp/invalid_segments_received", "Number of TCP segments received that the transport layer could not parse."),
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SegmentsSent: mustCreateMetric("/netstack/tcp/segments_sent", "Number of TCP segments sent."),
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SegmentSendErrors: mustCreateMetric("/netstack/tcp/segment_send_errors", "Number of TCP segments failed to be sent."),
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ResetsSent: mustCreateMetric("/netstack/tcp/resets_sent", "Number of TCP resets sent."),
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ResetsReceived: mustCreateMetric("/netstack/tcp/resets_received", "Number of TCP resets received."),
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Retransmits: mustCreateMetric("/netstack/tcp/retransmits", "Number of TCP segments retransmitted."),
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FastRecovery: mustCreateMetric("/netstack/tcp/fast_recovery", "Number of times fast recovery was used to recover from packet loss."),
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SACKRecovery: mustCreateMetric("/netstack/tcp/sack_recovery", "Number of times SACK recovery was used to recover from packet loss."),
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SlowStartRetransmits: mustCreateMetric("/netstack/tcp/slow_start_retransmits", "Number of segments retransmitted in slow start mode."),
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FastRetransmit: mustCreateMetric("/netstack/tcp/fast_retransmit", "Number of TCP segments which were fast retransmitted."),
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Timeouts: mustCreateMetric("/netstack/tcp/timeouts", "Number of times RTO expired."),
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ChecksumErrors: mustCreateMetric("/netstack/tcp/checksum_errors", "Number of segments dropped due to bad checksums."),
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},
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UDP: tcpip.UDPStats{
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PacketsReceived: mustCreateMetric("/netstack/udp/packets_received", "Number of UDP datagrams received via HandlePacket."),
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UnknownPortErrors: mustCreateMetric("/netstack/udp/unknown_port_errors", "Number of incoming UDP datagrams dropped because they did not have a known destination port."),
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ReceiveBufferErrors: mustCreateMetric("/netstack/udp/receive_buffer_errors", "Number of incoming UDP datagrams dropped due to the receiving buffer being in an invalid state."),
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MalformedPacketsReceived: mustCreateMetric("/netstack/udp/malformed_packets_received", "Number of incoming UDP datagrams dropped due to the UDP header being in a malformed state."),
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PacketsSent: mustCreateMetric("/netstack/udp/packets_sent", "Number of UDP datagrams sent."),
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PacketSendErrors: mustCreateMetric("/netstack/udp/packet_send_errors", "Number of UDP datagrams failed to be sent."),
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},
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}
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// DefaultTTL is linux's default TTL. All network protocols in all stacks used
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// with this package must have this value set as their default TTL.
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const DefaultTTL = 64
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const sizeOfInt32 int = 4
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var errStackType = syserr.New("expected but did not receive a netstack.Stack", linux.EINVAL)
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// ntohs converts a 16-bit number from network byte order to host byte order. It
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// assumes that the host is little endian.
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func ntohs(v uint16) uint16 {
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return v<<8 | v>>8
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}
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// htons converts a 16-bit number from host byte order to network byte order. It
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// assumes that the host is little endian.
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func htons(v uint16) uint16 {
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return ntohs(v)
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}
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// commonEndpoint represents the intersection of a tcpip.Endpoint and a
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// transport.Endpoint.
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type commonEndpoint interface {
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// GetLocalAddress implements tcpip.Endpoint.GetLocalAddress and
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// transport.Endpoint.GetLocalAddress.
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GetLocalAddress() (tcpip.FullAddress, *tcpip.Error)
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// GetRemoteAddress implements tcpip.Endpoint.GetRemoteAddress and
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// transport.Endpoint.GetRemoteAddress.
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GetRemoteAddress() (tcpip.FullAddress, *tcpip.Error)
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// Readiness implements tcpip.Endpoint.Readiness and
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// transport.Endpoint.Readiness.
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Readiness(mask waiter.EventMask) waiter.EventMask
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// SetSockOpt implements tcpip.Endpoint.SetSockOpt and
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// transport.Endpoint.SetSockOpt.
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SetSockOpt(interface{}) *tcpip.Error
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// SetSockOptInt implements tcpip.Endpoint.SetSockOptInt and
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// transport.Endpoint.SetSockOptInt.
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SetSockOptInt(opt tcpip.SockOpt, v int) *tcpip.Error
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// GetSockOpt implements tcpip.Endpoint.GetSockOpt and
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// transport.Endpoint.GetSockOpt.
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GetSockOpt(interface{}) *tcpip.Error
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// GetSockOptInt implements tcpip.Endpoint.GetSockOptInt and
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// transport.Endpoint.GetSockOpt.
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GetSockOptInt(opt tcpip.SockOpt) (int, *tcpip.Error)
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}
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// SocketOperations encapsulates all the state needed to represent a network stack
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// endpoint in the kernel context.
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//
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// +stateify savable
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type SocketOperations struct {
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fsutil.FilePipeSeek `state:"nosave"`
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fsutil.FileNotDirReaddir `state:"nosave"`
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fsutil.FileNoopFlush `state:"nosave"`
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fsutil.FileNoFsync `state:"nosave"`
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fsutil.FileNoMMap `state:"nosave"`
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fsutil.FileUseInodeUnstableAttr `state:"nosave"`
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socket.SendReceiveTimeout
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*waiter.Queue
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family int
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Endpoint tcpip.Endpoint
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skType linux.SockType
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protocol int
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// readMu protects access to the below fields.
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readMu sync.Mutex `state:"nosave"`
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// readView contains the remaining payload from the last packet.
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readView buffer.View
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// readCM holds control message information for the last packet read
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// from Endpoint.
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readCM tcpip.ControlMessages
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sender tcpip.FullAddress
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// sockOptTimestamp corresponds to SO_TIMESTAMP. When true, timestamps
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// of returned messages can be returned via control messages. When
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// false, the same timestamp is instead stored and can be read via the
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// SIOCGSTAMP ioctl. It is protected by readMu. See socket(7).
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sockOptTimestamp bool
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// timestampValid indicates whether timestamp for SIOCGSTAMP has been
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// set. It is protected by readMu.
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timestampValid bool
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// timestampNS holds the timestamp to use with SIOCTSTAMP. It is only
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// valid when timestampValid is true. It is protected by readMu.
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timestampNS int64
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// sockOptInq corresponds to TCP_INQ. It is implemented at this level
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// because it takes into account data from readView.
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sockOptInq bool
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}
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// New creates a new endpoint socket.
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func New(t *kernel.Task, family int, skType linux.SockType, protocol int, queue *waiter.Queue, endpoint tcpip.Endpoint) (*fs.File, *syserr.Error) {
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if skType == linux.SOCK_STREAM {
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if err := endpoint.SetSockOpt(tcpip.DelayOption(1)); err != nil {
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return nil, syserr.TranslateNetstackError(err)
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}
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}
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dirent := socket.NewDirent(t, netstackDevice)
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defer dirent.DecRef()
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return fs.NewFile(t, dirent, fs.FileFlags{Read: true, Write: true, NonSeekable: true}, &SocketOperations{
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Queue: queue,
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family: family,
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Endpoint: endpoint,
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skType: skType,
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protocol: protocol,
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}), nil
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}
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var sockAddrInetSize = int(binary.Size(linux.SockAddrInet{}))
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var sockAddrInet6Size = int(binary.Size(linux.SockAddrInet6{}))
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// bytesToIPAddress converts an IPv4 or IPv6 address from the user to the
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// netstack representation taking any addresses into account.
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func bytesToIPAddress(addr []byte) tcpip.Address {
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if bytes.Equal(addr, make([]byte, 4)) || bytes.Equal(addr, make([]byte, 16)) {
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return ""
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}
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return tcpip.Address(addr)
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}
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// AddressAndFamily reads an sockaddr struct from the given address and
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// converts it to the FullAddress format. It supports AF_UNIX, AF_INET and
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// AF_INET6 addresses.
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//
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// strict indicates whether addresses with the AF_UNSPEC family are accepted of not.
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//
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// AddressAndFamily returns an address, its family.
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func AddressAndFamily(sfamily int, addr []byte, strict bool) (tcpip.FullAddress, uint16, *syserr.Error) {
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// Make sure we have at least 2 bytes for the address family.
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if len(addr) < 2 {
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return tcpip.FullAddress{}, 0, syserr.ErrInvalidArgument
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}
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family := usermem.ByteOrder.Uint16(addr)
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|
if family != uint16(sfamily) && (!strict && family != linux.AF_UNSPEC) {
|
|
return tcpip.FullAddress{}, family, syserr.ErrAddressFamilyNotSupported
|
|
}
|
|
|
|
// Get the rest of the fields based on the address family.
|
|
switch family {
|
|
case linux.AF_UNIX:
|
|
path := addr[2:]
|
|
if len(path) > linux.UnixPathMax {
|
|
return tcpip.FullAddress{}, family, syserr.ErrInvalidArgument
|
|
}
|
|
// Drop the terminating NUL (if one exists) and everything after
|
|
// it for filesystem (non-abstract) addresses.
|
|
if len(path) > 0 && path[0] != 0 {
|
|
if n := bytes.IndexByte(path[1:], 0); n >= 0 {
|
|
path = path[:n+1]
|
|
}
|
|
}
|
|
return tcpip.FullAddress{
|
|
Addr: tcpip.Address(path),
|
|
}, family, nil
|
|
|
|
case linux.AF_INET:
|
|
var a linux.SockAddrInet
|
|
if len(addr) < sockAddrInetSize {
|
|
return tcpip.FullAddress{}, family, syserr.ErrInvalidArgument
|
|
}
|
|
binary.Unmarshal(addr[:sockAddrInetSize], usermem.ByteOrder, &a)
|
|
|
|
out := tcpip.FullAddress{
|
|
Addr: bytesToIPAddress(a.Addr[:]),
|
|
Port: ntohs(a.Port),
|
|
}
|
|
return out, family, nil
|
|
|
|
case linux.AF_INET6:
|
|
var a linux.SockAddrInet6
|
|
if len(addr) < sockAddrInet6Size {
|
|
return tcpip.FullAddress{}, family, syserr.ErrInvalidArgument
|
|
}
|
|
binary.Unmarshal(addr[:sockAddrInet6Size], usermem.ByteOrder, &a)
|
|
|
|
out := tcpip.FullAddress{
|
|
Addr: bytesToIPAddress(a.Addr[:]),
|
|
Port: ntohs(a.Port),
|
|
}
|
|
if isLinkLocal(out.Addr) {
|
|
out.NIC = tcpip.NICID(a.Scope_id)
|
|
}
|
|
return out, family, nil
|
|
|
|
case linux.AF_UNSPEC:
|
|
return tcpip.FullAddress{}, family, nil
|
|
|
|
default:
|
|
return tcpip.FullAddress{}, 0, syserr.ErrAddressFamilyNotSupported
|
|
}
|
|
}
|
|
|
|
func (s *SocketOperations) isPacketBased() bool {
|
|
return s.skType == linux.SOCK_DGRAM || s.skType == linux.SOCK_SEQPACKET || s.skType == linux.SOCK_RDM || s.skType == linux.SOCK_RAW
|
|
}
|
|
|
|
// fetchReadView updates the readView field of the socket if it's currently
|
|
// empty. It assumes that the socket is locked.
|
|
func (s *SocketOperations) fetchReadView() *syserr.Error {
|
|
if len(s.readView) > 0 {
|
|
return nil
|
|
}
|
|
|
|
s.readView = nil
|
|
s.sender = tcpip.FullAddress{}
|
|
|
|
v, cms, err := s.Endpoint.Read(&s.sender)
|
|
if err != nil {
|
|
return syserr.TranslateNetstackError(err)
|
|
}
|
|
|
|
s.readView = v
|
|
s.readCM = cms
|
|
|
|
return nil
|
|
}
|
|
|
|
// Release implements fs.FileOperations.Release.
|
|
func (s *SocketOperations) Release() {
|
|
s.Endpoint.Close()
|
|
}
|
|
|
|
// Read implements fs.FileOperations.Read.
|
|
func (s *SocketOperations) Read(ctx context.Context, _ *fs.File, dst usermem.IOSequence, _ int64) (int64, error) {
|
|
if dst.NumBytes() == 0 {
|
|
return 0, nil
|
|
}
|
|
n, _, _, _, _, err := s.nonBlockingRead(ctx, dst, false, false, false)
|
|
if err == syserr.ErrWouldBlock {
|
|
return int64(n), syserror.ErrWouldBlock
|
|
}
|
|
if err != nil {
|
|
return 0, err.ToError()
|
|
}
|
|
return int64(n), nil
|
|
}
|
|
|
|
// WriteTo implements fs.FileOperations.WriteTo.
|
|
func (s *SocketOperations) WriteTo(ctx context.Context, _ *fs.File, dst io.Writer, count int64, dup bool) (int64, error) {
|
|
s.readMu.Lock()
|
|
|
|
// Copy as much data as possible.
|
|
done := int64(0)
|
|
for count > 0 {
|
|
// This may return a blocking error.
|
|
if err := s.fetchReadView(); err != nil {
|
|
s.readMu.Unlock()
|
|
return done, err.ToError()
|
|
}
|
|
|
|
// Write to the underlying file.
|
|
n, err := dst.Write(s.readView)
|
|
done += int64(n)
|
|
count -= int64(n)
|
|
if dup {
|
|
// That's all we support for dup. This is generally
|
|
// supported by any Linux system calls, but the
|
|
// expectation is that now a caller will call read to
|
|
// actually remove these bytes from the socket.
|
|
break
|
|
}
|
|
|
|
// Drop that part of the view.
|
|
s.readView.TrimFront(n)
|
|
if err != nil {
|
|
s.readMu.Unlock()
|
|
return done, err
|
|
}
|
|
}
|
|
|
|
s.readMu.Unlock()
|
|
return done, nil
|
|
}
|
|
|
|
// ioSequencePayload implements tcpip.Payload.
|
|
//
|
|
// t copies user memory bytes on demand based on the requested size.
|
|
type ioSequencePayload struct {
|
|
ctx context.Context
|
|
src usermem.IOSequence
|
|
}
|
|
|
|
// FullPayload implements tcpip.Payloader.FullPayload
|
|
func (i *ioSequencePayload) FullPayload() ([]byte, *tcpip.Error) {
|
|
return i.Payload(int(i.src.NumBytes()))
|
|
}
|
|
|
|
// Payload implements tcpip.Payloader.Payload.
|
|
func (i *ioSequencePayload) Payload(size int) ([]byte, *tcpip.Error) {
|
|
if max := int(i.src.NumBytes()); size > max {
|
|
size = max
|
|
}
|
|
v := buffer.NewView(size)
|
|
if _, err := i.src.CopyIn(i.ctx, v); err != nil {
|
|
return nil, tcpip.ErrBadAddress
|
|
}
|
|
return v, nil
|
|
}
|
|
|
|
// DropFirst drops the first n bytes from underlying src.
|
|
func (i *ioSequencePayload) DropFirst(n int) {
|
|
i.src = i.src.DropFirst(int(n))
|
|
}
|
|
|
|
// Write implements fs.FileOperations.Write.
|
|
func (s *SocketOperations) Write(ctx context.Context, _ *fs.File, src usermem.IOSequence, _ int64) (int64, error) {
|
|
f := &ioSequencePayload{ctx: ctx, src: src}
|
|
n, resCh, err := s.Endpoint.Write(f, tcpip.WriteOptions{})
|
|
if err == tcpip.ErrWouldBlock {
|
|
return 0, syserror.ErrWouldBlock
|
|
}
|
|
|
|
if resCh != nil {
|
|
t := ctx.(*kernel.Task)
|
|
if err := t.Block(resCh); err != nil {
|
|
return 0, syserr.FromError(err).ToError()
|
|
}
|
|
|
|
n, _, err = s.Endpoint.Write(f, tcpip.WriteOptions{})
|
|
}
|
|
|
|
if err != nil {
|
|
return 0, syserr.TranslateNetstackError(err).ToError()
|
|
}
|
|
|
|
if int64(n) < src.NumBytes() {
|
|
return int64(n), syserror.ErrWouldBlock
|
|
}
|
|
|
|
return int64(n), nil
|
|
}
|
|
|
|
// readerPayload implements tcpip.Payloader.
|
|
//
|
|
// It allocates a view and reads from a reader on-demand, based on available
|
|
// capacity in the endpoint.
|
|
type readerPayload struct {
|
|
ctx context.Context
|
|
r io.Reader
|
|
count int64
|
|
err error
|
|
}
|
|
|
|
// FullPayload implements tcpip.Payloader.FullPayload.
|
|
func (r *readerPayload) FullPayload() ([]byte, *tcpip.Error) {
|
|
return r.Payload(int(r.count))
|
|
}
|
|
|
|
// Payload implements tcpip.Payloader.Payload.
|
|
func (r *readerPayload) Payload(size int) ([]byte, *tcpip.Error) {
|
|
if size > int(r.count) {
|
|
size = int(r.count)
|
|
}
|
|
v := buffer.NewView(size)
|
|
n, err := r.r.Read(v)
|
|
if n > 0 {
|
|
// We ignore the error here. It may re-occur on subsequent
|
|
// reads, but for now we can enqueue some amount of data.
|
|
r.count -= int64(n)
|
|
return v[:n], nil
|
|
}
|
|
if err == syserror.ErrWouldBlock {
|
|
return nil, tcpip.ErrWouldBlock
|
|
} else if err != nil {
|
|
r.err = err // Save for propation.
|
|
return nil, tcpip.ErrBadAddress
|
|
}
|
|
|
|
// There is no data and no error. Return an error, which will propagate
|
|
// r.err, which will be nil. This is the desired result: (0, nil).
|
|
return nil, tcpip.ErrBadAddress
|
|
}
|
|
|
|
// ReadFrom implements fs.FileOperations.ReadFrom.
|
|
func (s *SocketOperations) ReadFrom(ctx context.Context, _ *fs.File, r io.Reader, count int64) (int64, error) {
|
|
f := &readerPayload{ctx: ctx, r: r, count: count}
|
|
n, resCh, err := s.Endpoint.Write(f, tcpip.WriteOptions{
|
|
// Reads may be destructive but should be very fast,
|
|
// so we can't release the lock while copying data.
|
|
Atomic: true,
|
|
})
|
|
if err == tcpip.ErrWouldBlock {
|
|
return 0, syserror.ErrWouldBlock
|
|
}
|
|
|
|
if resCh != nil {
|
|
t := ctx.(*kernel.Task)
|
|
if err := t.Block(resCh); err != nil {
|
|
return 0, syserr.FromError(err).ToError()
|
|
}
|
|
|
|
n, _, err = s.Endpoint.Write(f, tcpip.WriteOptions{
|
|
Atomic: true, // See above.
|
|
})
|
|
}
|
|
if err == tcpip.ErrWouldBlock {
|
|
return n, syserror.ErrWouldBlock
|
|
} else if err != nil {
|
|
return int64(n), f.err // Propagate error.
|
|
}
|
|
|
|
return int64(n), nil
|
|
}
|
|
|
|
// Readiness returns a mask of ready events for socket s.
|
|
func (s *SocketOperations) Readiness(mask waiter.EventMask) waiter.EventMask {
|
|
r := s.Endpoint.Readiness(mask)
|
|
|
|
// Check our cached value iff the caller asked for readability and the
|
|
// endpoint itself is currently not readable.
|
|
if (mask & ^r & waiter.EventIn) != 0 {
|
|
s.readMu.Lock()
|
|
if len(s.readView) > 0 {
|
|
r |= waiter.EventIn
|
|
}
|
|
s.readMu.Unlock()
|
|
}
|
|
|
|
return r
|
|
}
|
|
|
|
// Connect implements the linux syscall connect(2) for sockets backed by
|
|
// tpcip.Endpoint.
|
|
func (s *SocketOperations) Connect(t *kernel.Task, sockaddr []byte, blocking bool) *syserr.Error {
|
|
addr, family, err := AddressAndFamily(s.family, sockaddr, false /* strict */)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if family == linux.AF_UNSPEC {
|
|
err := s.Endpoint.Disconnect()
|
|
if err == tcpip.ErrNotSupported {
|
|
return syserr.ErrAddressFamilyNotSupported
|
|
}
|
|
return syserr.TranslateNetstackError(err)
|
|
}
|
|
// Always return right away in the non-blocking case.
|
|
if !blocking {
|
|
return syserr.TranslateNetstackError(s.Endpoint.Connect(addr))
|
|
}
|
|
|
|
// Register for notification when the endpoint becomes writable, then
|
|
// initiate the connection.
|
|
e, ch := waiter.NewChannelEntry(nil)
|
|
s.EventRegister(&e, waiter.EventOut)
|
|
defer s.EventUnregister(&e)
|
|
|
|
if err := s.Endpoint.Connect(addr); err != tcpip.ErrConnectStarted && err != tcpip.ErrAlreadyConnecting {
|
|
return syserr.TranslateNetstackError(err)
|
|
}
|
|
|
|
// It's pending, so we have to wait for a notification, and fetch the
|
|
// result once the wait completes.
|
|
if err := t.Block(ch); err != nil {
|
|
return syserr.FromError(err)
|
|
}
|
|
|
|
// Call Connect() again after blocking to find connect's result.
|
|
return syserr.TranslateNetstackError(s.Endpoint.Connect(addr))
|
|
}
|
|
|
|
// Bind implements the linux syscall bind(2) for sockets backed by
|
|
// tcpip.Endpoint.
|
|
func (s *SocketOperations) Bind(t *kernel.Task, sockaddr []byte) *syserr.Error {
|
|
addr, _, err := AddressAndFamily(s.family, sockaddr, true /* strict */)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// Issue the bind request to the endpoint.
|
|
return syserr.TranslateNetstackError(s.Endpoint.Bind(addr))
|
|
}
|
|
|
|
// Listen implements the linux syscall listen(2) for sockets backed by
|
|
// tcpip.Endpoint.
|
|
func (s *SocketOperations) Listen(t *kernel.Task, backlog int) *syserr.Error {
|
|
return syserr.TranslateNetstackError(s.Endpoint.Listen(backlog))
|
|
}
|
|
|
|
// blockingAccept implements a blocking version of accept(2), that is, if no
|
|
// connections are ready to be accept, it will block until one becomes ready.
|
|
func (s *SocketOperations) blockingAccept(t *kernel.Task) (tcpip.Endpoint, *waiter.Queue, *syserr.Error) {
|
|
// Register for notifications.
|
|
e, ch := waiter.NewChannelEntry(nil)
|
|
s.EventRegister(&e, waiter.EventIn)
|
|
defer s.EventUnregister(&e)
|
|
|
|
// Try to accept the connection again; if it fails, then wait until we
|
|
// get a notification.
|
|
for {
|
|
if ep, wq, err := s.Endpoint.Accept(); err != tcpip.ErrWouldBlock {
|
|
return ep, wq, syserr.TranslateNetstackError(err)
|
|
}
|
|
|
|
if err := t.Block(ch); err != nil {
|
|
return nil, nil, syserr.FromError(err)
|
|
}
|
|
}
|
|
}
|
|
|
|
// Accept implements the linux syscall accept(2) for sockets backed by
|
|
// tcpip.Endpoint.
|
|
func (s *SocketOperations) Accept(t *kernel.Task, peerRequested bool, flags int, blocking bool) (int32, linux.SockAddr, uint32, *syserr.Error) {
|
|
// Issue the accept request to get the new endpoint.
|
|
ep, wq, terr := s.Endpoint.Accept()
|
|
if terr != nil {
|
|
if terr != tcpip.ErrWouldBlock || !blocking {
|
|
return 0, nil, 0, syserr.TranslateNetstackError(terr)
|
|
}
|
|
|
|
var err *syserr.Error
|
|
ep, wq, err = s.blockingAccept(t)
|
|
if err != nil {
|
|
return 0, nil, 0, err
|
|
}
|
|
}
|
|
|
|
ns, err := New(t, s.family, s.skType, s.protocol, wq, ep)
|
|
if err != nil {
|
|
return 0, nil, 0, err
|
|
}
|
|
defer ns.DecRef()
|
|
|
|
if flags&linux.SOCK_NONBLOCK != 0 {
|
|
flags := ns.Flags()
|
|
flags.NonBlocking = true
|
|
ns.SetFlags(flags.Settable())
|
|
}
|
|
|
|
var addr linux.SockAddr
|
|
var addrLen uint32
|
|
if peerRequested {
|
|
// Get address of the peer and write it to peer slice.
|
|
var err *syserr.Error
|
|
addr, addrLen, err = ns.FileOperations.(*SocketOperations).GetPeerName(t)
|
|
if err != nil {
|
|
return 0, nil, 0, err
|
|
}
|
|
}
|
|
|
|
fd, e := t.NewFDFrom(0, ns, kernel.FDFlags{
|
|
CloseOnExec: flags&linux.SOCK_CLOEXEC != 0,
|
|
})
|
|
|
|
t.Kernel().RecordSocket(ns)
|
|
|
|
return fd, addr, addrLen, syserr.FromError(e)
|
|
}
|
|
|
|
// ConvertShutdown converts Linux shutdown flags into tcpip shutdown flags.
|
|
func ConvertShutdown(how int) (tcpip.ShutdownFlags, *syserr.Error) {
|
|
var f tcpip.ShutdownFlags
|
|
switch how {
|
|
case linux.SHUT_RD:
|
|
f = tcpip.ShutdownRead
|
|
case linux.SHUT_WR:
|
|
f = tcpip.ShutdownWrite
|
|
case linux.SHUT_RDWR:
|
|
f = tcpip.ShutdownRead | tcpip.ShutdownWrite
|
|
default:
|
|
return 0, syserr.ErrInvalidArgument
|
|
}
|
|
return f, nil
|
|
}
|
|
|
|
// Shutdown implements the linux syscall shutdown(2) for sockets backed by
|
|
// tcpip.Endpoint.
|
|
func (s *SocketOperations) Shutdown(t *kernel.Task, how int) *syserr.Error {
|
|
f, err := ConvertShutdown(how)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// Issue shutdown request.
|
|
return syserr.TranslateNetstackError(s.Endpoint.Shutdown(f))
|
|
}
|
|
|
|
// GetSockOpt implements the linux syscall getsockopt(2) for sockets backed by
|
|
// tcpip.Endpoint.
|
|
func (s *SocketOperations) GetSockOpt(t *kernel.Task, level, name int, outPtr usermem.Addr, outLen int) (interface{}, *syserr.Error) {
|
|
// TODO(b/78348848): Unlike other socket options, SO_TIMESTAMP is
|
|
// implemented specifically for netstack.SocketOperations rather than
|
|
// commonEndpoint. commonEndpoint should be extended to support socket
|
|
// options where the implementation is not shared, as unix sockets need
|
|
// their own support for SO_TIMESTAMP.
|
|
if level == linux.SOL_SOCKET && name == linux.SO_TIMESTAMP {
|
|
if outLen < sizeOfInt32 {
|
|
return nil, syserr.ErrInvalidArgument
|
|
}
|
|
val := int32(0)
|
|
s.readMu.Lock()
|
|
defer s.readMu.Unlock()
|
|
if s.sockOptTimestamp {
|
|
val = 1
|
|
}
|
|
return val, nil
|
|
}
|
|
if level == linux.SOL_TCP && name == linux.TCP_INQ {
|
|
if outLen < sizeOfInt32 {
|
|
return nil, syserr.ErrInvalidArgument
|
|
}
|
|
val := int32(0)
|
|
s.readMu.Lock()
|
|
defer s.readMu.Unlock()
|
|
if s.sockOptInq {
|
|
val = 1
|
|
}
|
|
return val, nil
|
|
}
|
|
|
|
if s.skType == linux.SOCK_RAW && level == linux.IPPROTO_IP {
|
|
switch name {
|
|
case linux.IPT_SO_GET_INFO:
|
|
if outLen < linux.SizeOfIPTGetinfo {
|
|
return nil, syserr.ErrInvalidArgument
|
|
}
|
|
|
|
info, err := netfilter.GetInfo(t, s.Endpoint, outPtr)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return info, nil
|
|
|
|
case linux.IPT_SO_GET_ENTRIES:
|
|
if outLen < linux.SizeOfIPTGetEntries {
|
|
return nil, syserr.ErrInvalidArgument
|
|
}
|
|
|
|
entries, err := netfilter.GetEntries(t, s.Endpoint, outPtr, outLen)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return entries, nil
|
|
|
|
}
|
|
}
|
|
|
|
return GetSockOpt(t, s, s.Endpoint, s.family, s.skType, level, name, outLen)
|
|
}
|
|
|
|
// GetSockOpt can be used to implement the linux syscall getsockopt(2) for
|
|
// sockets backed by a commonEndpoint.
|
|
func GetSockOpt(t *kernel.Task, s socket.Socket, ep commonEndpoint, family int, skType linux.SockType, level, name, outLen int) (interface{}, *syserr.Error) {
|
|
switch level {
|
|
case linux.SOL_SOCKET:
|
|
return getSockOptSocket(t, s, ep, family, skType, name, outLen)
|
|
|
|
case linux.SOL_TCP:
|
|
return getSockOptTCP(t, ep, name, outLen)
|
|
|
|
case linux.SOL_IPV6:
|
|
return getSockOptIPv6(t, ep, name, outLen)
|
|
|
|
case linux.SOL_IP:
|
|
return getSockOptIP(t, ep, name, outLen, family)
|
|
|
|
case linux.SOL_UDP,
|
|
linux.SOL_ICMPV6,
|
|
linux.SOL_RAW,
|
|
linux.SOL_PACKET:
|
|
|
|
t.Kernel().EmitUnimplementedEvent(t)
|
|
}
|
|
|
|
return nil, syserr.ErrProtocolNotAvailable
|
|
}
|
|
|
|
// getSockOptSocket implements GetSockOpt when level is SOL_SOCKET.
|
|
func getSockOptSocket(t *kernel.Task, s socket.Socket, ep commonEndpoint, family int, skType linux.SockType, name, outLen int) (interface{}, *syserr.Error) {
|
|
// TODO(b/124056281): Stop rejecting short optLen values in getsockopt.
|
|
switch name {
|
|
case linux.SO_ERROR:
|
|
if outLen < sizeOfInt32 {
|
|
return nil, syserr.ErrInvalidArgument
|
|
}
|
|
|
|
// Get the last error and convert it.
|
|
err := ep.GetSockOpt(tcpip.ErrorOption{})
|
|
if err == nil {
|
|
return int32(0), nil
|
|
}
|
|
return int32(syserr.TranslateNetstackError(err).ToLinux().Number()), nil
|
|
|
|
case linux.SO_PEERCRED:
|
|
if family != linux.AF_UNIX || outLen < syscall.SizeofUcred {
|
|
return nil, syserr.ErrInvalidArgument
|
|
}
|
|
|
|
tcred := t.Credentials()
|
|
return syscall.Ucred{
|
|
Pid: int32(t.ThreadGroup().ID()),
|
|
Uid: uint32(tcred.EffectiveKUID.In(tcred.UserNamespace).OrOverflow()),
|
|
Gid: uint32(tcred.EffectiveKGID.In(tcred.UserNamespace).OrOverflow()),
|
|
}, nil
|
|
|
|
case linux.SO_PASSCRED:
|
|
if outLen < sizeOfInt32 {
|
|
return nil, syserr.ErrInvalidArgument
|
|
}
|
|
|
|
var v tcpip.PasscredOption
|
|
if err := ep.GetSockOpt(&v); err != nil {
|
|
return nil, syserr.TranslateNetstackError(err)
|
|
}
|
|
|
|
return int32(v), nil
|
|
|
|
case linux.SO_SNDBUF:
|
|
if outLen < sizeOfInt32 {
|
|
return nil, syserr.ErrInvalidArgument
|
|
}
|
|
|
|
size, err := ep.GetSockOptInt(tcpip.SendBufferSizeOption)
|
|
if err != nil {
|
|
return nil, syserr.TranslateNetstackError(err)
|
|
}
|
|
|
|
if size > math.MaxInt32 {
|
|
size = math.MaxInt32
|
|
}
|
|
|
|
return int32(size), nil
|
|
|
|
case linux.SO_RCVBUF:
|
|
if outLen < sizeOfInt32 {
|
|
return nil, syserr.ErrInvalidArgument
|
|
}
|
|
|
|
size, err := ep.GetSockOptInt(tcpip.ReceiveBufferSizeOption)
|
|
if err != nil {
|
|
return nil, syserr.TranslateNetstackError(err)
|
|
}
|
|
|
|
if size > math.MaxInt32 {
|
|
size = math.MaxInt32
|
|
}
|
|
|
|
return int32(size), nil
|
|
|
|
case linux.SO_REUSEADDR:
|
|
if outLen < sizeOfInt32 {
|
|
return nil, syserr.ErrInvalidArgument
|
|
}
|
|
|
|
var v tcpip.ReuseAddressOption
|
|
if err := ep.GetSockOpt(&v); err != nil {
|
|
return nil, syserr.TranslateNetstackError(err)
|
|
}
|
|
|
|
return int32(v), nil
|
|
|
|
case linux.SO_REUSEPORT:
|
|
if outLen < sizeOfInt32 {
|
|
return nil, syserr.ErrInvalidArgument
|
|
}
|
|
|
|
var v tcpip.ReusePortOption
|
|
if err := ep.GetSockOpt(&v); err != nil {
|
|
return nil, syserr.TranslateNetstackError(err)
|
|
}
|
|
|
|
return int32(v), nil
|
|
|
|
case linux.SO_BINDTODEVICE:
|
|
var v tcpip.BindToDeviceOption
|
|
if err := ep.GetSockOpt(&v); err != nil {
|
|
return nil, syserr.TranslateNetstackError(err)
|
|
}
|
|
if len(v) == 0 {
|
|
return []byte{}, nil
|
|
}
|
|
if outLen < linux.IFNAMSIZ {
|
|
return nil, syserr.ErrInvalidArgument
|
|
}
|
|
return append([]byte(v), 0), nil
|
|
|
|
case linux.SO_BROADCAST:
|
|
if outLen < sizeOfInt32 {
|
|
return nil, syserr.ErrInvalidArgument
|
|
}
|
|
|
|
var v tcpip.BroadcastOption
|
|
if err := ep.GetSockOpt(&v); err != nil {
|
|
return nil, syserr.TranslateNetstackError(err)
|
|
}
|
|
|
|
return int32(v), nil
|
|
|
|
case linux.SO_KEEPALIVE:
|
|
if outLen < sizeOfInt32 {
|
|
return nil, syserr.ErrInvalidArgument
|
|
}
|
|
|
|
var v tcpip.KeepaliveEnabledOption
|
|
if err := ep.GetSockOpt(&v); err != nil {
|
|
return nil, syserr.TranslateNetstackError(err)
|
|
}
|
|
|
|
return int32(v), nil
|
|
|
|
case linux.SO_LINGER:
|
|
if outLen < linux.SizeOfLinger {
|
|
return nil, syserr.ErrInvalidArgument
|
|
}
|
|
return linux.Linger{}, nil
|
|
|
|
case linux.SO_SNDTIMEO:
|
|
// TODO(igudger): Linux allows shorter lengths for partial results.
|
|
if outLen < linux.SizeOfTimeval {
|
|
return nil, syserr.ErrInvalidArgument
|
|
}
|
|
|
|
return linux.NsecToTimeval(s.SendTimeout()), nil
|
|
|
|
case linux.SO_RCVTIMEO:
|
|
// TODO(igudger): Linux allows shorter lengths for partial results.
|
|
if outLen < linux.SizeOfTimeval {
|
|
return nil, syserr.ErrInvalidArgument
|
|
}
|
|
|
|
return linux.NsecToTimeval(s.RecvTimeout()), nil
|
|
|
|
case linux.SO_OOBINLINE:
|
|
if outLen < sizeOfInt32 {
|
|
return nil, syserr.ErrInvalidArgument
|
|
}
|
|
|
|
var v tcpip.OutOfBandInlineOption
|
|
if err := ep.GetSockOpt(&v); err != nil {
|
|
return nil, syserr.TranslateNetstackError(err)
|
|
}
|
|
|
|
return int32(v), nil
|
|
|
|
default:
|
|
socket.GetSockOptEmitUnimplementedEvent(t, name)
|
|
}
|
|
return nil, syserr.ErrProtocolNotAvailable
|
|
}
|
|
|
|
// getSockOptTCP implements GetSockOpt when level is SOL_TCP.
|
|
func getSockOptTCP(t *kernel.Task, ep commonEndpoint, name, outLen int) (interface{}, *syserr.Error) {
|
|
switch name {
|
|
case linux.TCP_NODELAY:
|
|
if outLen < sizeOfInt32 {
|
|
return nil, syserr.ErrInvalidArgument
|
|
}
|
|
|
|
var v tcpip.DelayOption
|
|
if err := ep.GetSockOpt(&v); err != nil {
|
|
return nil, syserr.TranslateNetstackError(err)
|
|
}
|
|
|
|
if v == 0 {
|
|
return int32(1), nil
|
|
}
|
|
return int32(0), nil
|
|
|
|
case linux.TCP_CORK:
|
|
if outLen < sizeOfInt32 {
|
|
return nil, syserr.ErrInvalidArgument
|
|
}
|
|
|
|
var v tcpip.CorkOption
|
|
if err := ep.GetSockOpt(&v); err != nil {
|
|
return nil, syserr.TranslateNetstackError(err)
|
|
}
|
|
|
|
return int32(v), nil
|
|
|
|
case linux.TCP_QUICKACK:
|
|
if outLen < sizeOfInt32 {
|
|
return nil, syserr.ErrInvalidArgument
|
|
}
|
|
|
|
var v tcpip.QuickAckOption
|
|
if err := ep.GetSockOpt(&v); err != nil {
|
|
return nil, syserr.TranslateNetstackError(err)
|
|
}
|
|
|
|
return int32(v), nil
|
|
|
|
case linux.TCP_MAXSEG:
|
|
if outLen < sizeOfInt32 {
|
|
return nil, syserr.ErrInvalidArgument
|
|
}
|
|
|
|
var v tcpip.MaxSegOption
|
|
if err := ep.GetSockOpt(&v); err != nil {
|
|
return nil, syserr.TranslateNetstackError(err)
|
|
}
|
|
|
|
return int32(v), nil
|
|
|
|
case linux.TCP_KEEPIDLE:
|
|
if outLen < sizeOfInt32 {
|
|
return nil, syserr.ErrInvalidArgument
|
|
}
|
|
|
|
var v tcpip.KeepaliveIdleOption
|
|
if err := ep.GetSockOpt(&v); err != nil {
|
|
return nil, syserr.TranslateNetstackError(err)
|
|
}
|
|
|
|
return int32(time.Duration(v) / time.Second), nil
|
|
|
|
case linux.TCP_KEEPINTVL:
|
|
if outLen < sizeOfInt32 {
|
|
return nil, syserr.ErrInvalidArgument
|
|
}
|
|
|
|
var v tcpip.KeepaliveIntervalOption
|
|
if err := ep.GetSockOpt(&v); err != nil {
|
|
return nil, syserr.TranslateNetstackError(err)
|
|
}
|
|
|
|
return int32(time.Duration(v) / time.Second), nil
|
|
|
|
case linux.TCP_INFO:
|
|
var v tcpip.TCPInfoOption
|
|
if err := ep.GetSockOpt(&v); err != nil {
|
|
return nil, syserr.TranslateNetstackError(err)
|
|
}
|
|
|
|
// TODO(b/64800844): Translate fields once they are added to
|
|
// tcpip.TCPInfoOption.
|
|
info := linux.TCPInfo{}
|
|
|
|
// Linux truncates the output binary to outLen.
|
|
ib := binary.Marshal(nil, usermem.ByteOrder, &info)
|
|
if len(ib) > outLen {
|
|
ib = ib[:outLen]
|
|
}
|
|
|
|
return ib, nil
|
|
|
|
case linux.TCP_CC_INFO,
|
|
linux.TCP_NOTSENT_LOWAT,
|
|
linux.TCP_ZEROCOPY_RECEIVE:
|
|
|
|
t.Kernel().EmitUnimplementedEvent(t)
|
|
|
|
case linux.TCP_CONGESTION:
|
|
if outLen <= 0 {
|
|
return nil, syserr.ErrInvalidArgument
|
|
}
|
|
|
|
var v tcpip.CongestionControlOption
|
|
if err := ep.GetSockOpt(&v); err != nil {
|
|
return nil, syserr.TranslateNetstackError(err)
|
|
}
|
|
|
|
// We match linux behaviour here where it returns the lower of
|
|
// TCP_CA_NAME_MAX bytes or the value of the option length.
|
|
//
|
|
// This is Linux's net/tcp.h TCP_CA_NAME_MAX.
|
|
const tcpCANameMax = 16
|
|
|
|
toCopy := tcpCANameMax
|
|
if outLen < tcpCANameMax {
|
|
toCopy = outLen
|
|
}
|
|
b := make([]byte, toCopy)
|
|
copy(b, v)
|
|
return b, nil
|
|
|
|
default:
|
|
emitUnimplementedEventTCP(t, name)
|
|
}
|
|
return nil, syserr.ErrProtocolNotAvailable
|
|
}
|
|
|
|
// getSockOptIPv6 implements GetSockOpt when level is SOL_IPV6.
|
|
func getSockOptIPv6(t *kernel.Task, ep commonEndpoint, name, outLen int) (interface{}, *syserr.Error) {
|
|
switch name {
|
|
case linux.IPV6_V6ONLY:
|
|
if outLen < sizeOfInt32 {
|
|
return nil, syserr.ErrInvalidArgument
|
|
}
|
|
|
|
var v tcpip.V6OnlyOption
|
|
if err := ep.GetSockOpt(&v); err != nil {
|
|
return nil, syserr.TranslateNetstackError(err)
|
|
}
|
|
|
|
return int32(v), nil
|
|
|
|
case linux.IPV6_PATHMTU:
|
|
t.Kernel().EmitUnimplementedEvent(t)
|
|
|
|
case linux.IPV6_TCLASS:
|
|
// Length handling for parity with Linux.
|
|
if outLen == 0 {
|
|
return make([]byte, 0), nil
|
|
}
|
|
var v tcpip.IPv6TrafficClassOption
|
|
if err := ep.GetSockOpt(&v); err != nil {
|
|
return nil, syserr.TranslateNetstackError(err)
|
|
}
|
|
|
|
uintv := uint32(v)
|
|
// Linux truncates the output binary to outLen.
|
|
ib := binary.Marshal(nil, usermem.ByteOrder, &uintv)
|
|
// Handle cases where outLen is lesser than sizeOfInt32.
|
|
if len(ib) > outLen {
|
|
ib = ib[:outLen]
|
|
}
|
|
return ib, nil
|
|
|
|
default:
|
|
emitUnimplementedEventIPv6(t, name)
|
|
}
|
|
return nil, syserr.ErrProtocolNotAvailable
|
|
}
|
|
|
|
// getSockOptIP implements GetSockOpt when level is SOL_IP.
|
|
func getSockOptIP(t *kernel.Task, ep commonEndpoint, name, outLen int, family int) (interface{}, *syserr.Error) {
|
|
switch name {
|
|
case linux.IP_TTL:
|
|
if outLen < sizeOfInt32 {
|
|
return nil, syserr.ErrInvalidArgument
|
|
}
|
|
|
|
var v tcpip.TTLOption
|
|
if err := ep.GetSockOpt(&v); err != nil {
|
|
return nil, syserr.TranslateNetstackError(err)
|
|
}
|
|
|
|
// Fill in the default value, if needed.
|
|
if v == 0 {
|
|
v = DefaultTTL
|
|
}
|
|
|
|
return int32(v), nil
|
|
|
|
case linux.IP_MULTICAST_TTL:
|
|
if outLen < sizeOfInt32 {
|
|
return nil, syserr.ErrInvalidArgument
|
|
}
|
|
|
|
var v tcpip.MulticastTTLOption
|
|
if err := ep.GetSockOpt(&v); err != nil {
|
|
return nil, syserr.TranslateNetstackError(err)
|
|
}
|
|
|
|
return int32(v), nil
|
|
|
|
case linux.IP_MULTICAST_IF:
|
|
if outLen < len(linux.InetAddr{}) {
|
|
return nil, syserr.ErrInvalidArgument
|
|
}
|
|
|
|
var v tcpip.MulticastInterfaceOption
|
|
if err := ep.GetSockOpt(&v); err != nil {
|
|
return nil, syserr.TranslateNetstackError(err)
|
|
}
|
|
|
|
a, _ := ConvertAddress(linux.AF_INET, tcpip.FullAddress{Addr: v.InterfaceAddr})
|
|
|
|
return a.(*linux.SockAddrInet).Addr, nil
|
|
|
|
case linux.IP_MULTICAST_LOOP:
|
|
if outLen < sizeOfInt32 {
|
|
return nil, syserr.ErrInvalidArgument
|
|
}
|
|
|
|
var v tcpip.MulticastLoopOption
|
|
if err := ep.GetSockOpt(&v); err != nil {
|
|
return nil, syserr.TranslateNetstackError(err)
|
|
}
|
|
|
|
if v {
|
|
return int32(1), nil
|
|
}
|
|
return int32(0), nil
|
|
|
|
case linux.IP_TOS:
|
|
// Length handling for parity with Linux.
|
|
if outLen == 0 {
|
|
return []byte(nil), nil
|
|
}
|
|
var v tcpip.IPv4TOSOption
|
|
if err := ep.GetSockOpt(&v); err != nil {
|
|
return nil, syserr.TranslateNetstackError(err)
|
|
}
|
|
if outLen < sizeOfInt32 {
|
|
return uint8(v), nil
|
|
}
|
|
return int32(v), nil
|
|
|
|
default:
|
|
emitUnimplementedEventIP(t, name)
|
|
}
|
|
return nil, syserr.ErrProtocolNotAvailable
|
|
}
|
|
|
|
// SetSockOpt implements the linux syscall setsockopt(2) for sockets backed by
|
|
// tcpip.Endpoint.
|
|
func (s *SocketOperations) SetSockOpt(t *kernel.Task, level int, name int, optVal []byte) *syserr.Error {
|
|
// TODO(b/78348848): Unlike other socket options, SO_TIMESTAMP is
|
|
// implemented specifically for netstack.SocketOperations rather than
|
|
// commonEndpoint. commonEndpoint should be extended to support socket
|
|
// options where the implementation is not shared, as unix sockets need
|
|
// their own support for SO_TIMESTAMP.
|
|
if level == linux.SOL_SOCKET && name == linux.SO_TIMESTAMP {
|
|
if len(optVal) < sizeOfInt32 {
|
|
return syserr.ErrInvalidArgument
|
|
}
|
|
s.readMu.Lock()
|
|
defer s.readMu.Unlock()
|
|
s.sockOptTimestamp = usermem.ByteOrder.Uint32(optVal) != 0
|
|
return nil
|
|
}
|
|
if level == linux.SOL_TCP && name == linux.TCP_INQ {
|
|
if len(optVal) < sizeOfInt32 {
|
|
return syserr.ErrInvalidArgument
|
|
}
|
|
s.readMu.Lock()
|
|
defer s.readMu.Unlock()
|
|
s.sockOptInq = usermem.ByteOrder.Uint32(optVal) != 0
|
|
return nil
|
|
}
|
|
|
|
return SetSockOpt(t, s, s.Endpoint, level, name, optVal)
|
|
}
|
|
|
|
// SetSockOpt can be used to implement the linux syscall setsockopt(2) for
|
|
// sockets backed by a commonEndpoint.
|
|
func SetSockOpt(t *kernel.Task, s socket.Socket, ep commonEndpoint, level int, name int, optVal []byte) *syserr.Error {
|
|
switch level {
|
|
case linux.SOL_SOCKET:
|
|
return setSockOptSocket(t, s, ep, name, optVal)
|
|
|
|
case linux.SOL_TCP:
|
|
return setSockOptTCP(t, ep, name, optVal)
|
|
|
|
case linux.SOL_IPV6:
|
|
return setSockOptIPv6(t, ep, name, optVal)
|
|
|
|
case linux.SOL_IP:
|
|
return setSockOptIP(t, ep, name, optVal)
|
|
|
|
case linux.SOL_UDP,
|
|
linux.SOL_ICMPV6,
|
|
linux.SOL_RAW,
|
|
linux.SOL_PACKET:
|
|
|
|
t.Kernel().EmitUnimplementedEvent(t)
|
|
}
|
|
|
|
// Default to the old behavior; hand off to network stack.
|
|
return syserr.TranslateNetstackError(ep.SetSockOpt(struct{}{}))
|
|
}
|
|
|
|
// setSockOptSocket implements SetSockOpt when level is SOL_SOCKET.
|
|
func setSockOptSocket(t *kernel.Task, s socket.Socket, ep commonEndpoint, name int, optVal []byte) *syserr.Error {
|
|
switch name {
|
|
case linux.SO_SNDBUF:
|
|
if len(optVal) < sizeOfInt32 {
|
|
return syserr.ErrInvalidArgument
|
|
}
|
|
|
|
v := usermem.ByteOrder.Uint32(optVal)
|
|
return syserr.TranslateNetstackError(ep.SetSockOptInt(tcpip.SendBufferSizeOption, int(v)))
|
|
|
|
case linux.SO_RCVBUF:
|
|
if len(optVal) < sizeOfInt32 {
|
|
return syserr.ErrInvalidArgument
|
|
}
|
|
|
|
v := usermem.ByteOrder.Uint32(optVal)
|
|
return syserr.TranslateNetstackError(ep.SetSockOptInt(tcpip.ReceiveBufferSizeOption, int(v)))
|
|
|
|
case linux.SO_REUSEADDR:
|
|
if len(optVal) < sizeOfInt32 {
|
|
return syserr.ErrInvalidArgument
|
|
}
|
|
|
|
v := usermem.ByteOrder.Uint32(optVal)
|
|
return syserr.TranslateNetstackError(ep.SetSockOpt(tcpip.ReuseAddressOption(v)))
|
|
|
|
case linux.SO_REUSEPORT:
|
|
if len(optVal) < sizeOfInt32 {
|
|
return syserr.ErrInvalidArgument
|
|
}
|
|
|
|
v := usermem.ByteOrder.Uint32(optVal)
|
|
return syserr.TranslateNetstackError(ep.SetSockOpt(tcpip.ReusePortOption(v)))
|
|
|
|
case linux.SO_BINDTODEVICE:
|
|
n := bytes.IndexByte(optVal, 0)
|
|
if n == -1 {
|
|
n = len(optVal)
|
|
}
|
|
return syserr.TranslateNetstackError(ep.SetSockOpt(tcpip.BindToDeviceOption(optVal[:n])))
|
|
|
|
case linux.SO_BROADCAST:
|
|
if len(optVal) < sizeOfInt32 {
|
|
return syserr.ErrInvalidArgument
|
|
}
|
|
|
|
v := usermem.ByteOrder.Uint32(optVal)
|
|
return syserr.TranslateNetstackError(ep.SetSockOpt(tcpip.BroadcastOption(v)))
|
|
|
|
case linux.SO_PASSCRED:
|
|
if len(optVal) < sizeOfInt32 {
|
|
return syserr.ErrInvalidArgument
|
|
}
|
|
|
|
v := usermem.ByteOrder.Uint32(optVal)
|
|
return syserr.TranslateNetstackError(ep.SetSockOpt(tcpip.PasscredOption(v)))
|
|
|
|
case linux.SO_KEEPALIVE:
|
|
if len(optVal) < sizeOfInt32 {
|
|
return syserr.ErrInvalidArgument
|
|
}
|
|
|
|
v := usermem.ByteOrder.Uint32(optVal)
|
|
return syserr.TranslateNetstackError(ep.SetSockOpt(tcpip.KeepaliveEnabledOption(v)))
|
|
|
|
case linux.SO_SNDTIMEO:
|
|
if len(optVal) < linux.SizeOfTimeval {
|
|
return syserr.ErrInvalidArgument
|
|
}
|
|
|
|
var v linux.Timeval
|
|
binary.Unmarshal(optVal[:linux.SizeOfTimeval], usermem.ByteOrder, &v)
|
|
if v.Usec < 0 || v.Usec >= int64(time.Second/time.Microsecond) {
|
|
return syserr.ErrDomain
|
|
}
|
|
s.SetSendTimeout(v.ToNsecCapped())
|
|
return nil
|
|
|
|
case linux.SO_RCVTIMEO:
|
|
if len(optVal) < linux.SizeOfTimeval {
|
|
return syserr.ErrInvalidArgument
|
|
}
|
|
|
|
var v linux.Timeval
|
|
binary.Unmarshal(optVal[:linux.SizeOfTimeval], usermem.ByteOrder, &v)
|
|
if v.Usec < 0 || v.Usec >= int64(time.Second/time.Microsecond) {
|
|
return syserr.ErrDomain
|
|
}
|
|
s.SetRecvTimeout(v.ToNsecCapped())
|
|
return nil
|
|
|
|
case linux.SO_OOBINLINE:
|
|
if len(optVal) < sizeOfInt32 {
|
|
return syserr.ErrInvalidArgument
|
|
}
|
|
|
|
v := usermem.ByteOrder.Uint32(optVal)
|
|
|
|
if v == 0 {
|
|
socket.SetSockOptEmitUnimplementedEvent(t, name)
|
|
}
|
|
|
|
return syserr.TranslateNetstackError(ep.SetSockOpt(tcpip.OutOfBandInlineOption(v)))
|
|
|
|
case linux.SO_LINGER:
|
|
if len(optVal) < linux.SizeOfLinger {
|
|
return syserr.ErrInvalidArgument
|
|
}
|
|
|
|
var v linux.Linger
|
|
binary.Unmarshal(optVal[:linux.SizeOfLinger], usermem.ByteOrder, &v)
|
|
|
|
if v != (linux.Linger{}) {
|
|
socket.SetSockOptEmitUnimplementedEvent(t, name)
|
|
}
|
|
|
|
return nil
|
|
|
|
default:
|
|
socket.SetSockOptEmitUnimplementedEvent(t, name)
|
|
}
|
|
|
|
// Default to the old behavior; hand off to network stack.
|
|
return syserr.TranslateNetstackError(ep.SetSockOpt(struct{}{}))
|
|
}
|
|
|
|
// setSockOptTCP implements SetSockOpt when level is SOL_TCP.
|
|
func setSockOptTCP(t *kernel.Task, ep commonEndpoint, name int, optVal []byte) *syserr.Error {
|
|
switch name {
|
|
case linux.TCP_NODELAY:
|
|
if len(optVal) < sizeOfInt32 {
|
|
return syserr.ErrInvalidArgument
|
|
}
|
|
|
|
v := usermem.ByteOrder.Uint32(optVal)
|
|
var o tcpip.DelayOption
|
|
if v == 0 {
|
|
o = 1
|
|
}
|
|
return syserr.TranslateNetstackError(ep.SetSockOpt(o))
|
|
|
|
case linux.TCP_CORK:
|
|
if len(optVal) < sizeOfInt32 {
|
|
return syserr.ErrInvalidArgument
|
|
}
|
|
|
|
v := usermem.ByteOrder.Uint32(optVal)
|
|
return syserr.TranslateNetstackError(ep.SetSockOpt(tcpip.CorkOption(v)))
|
|
|
|
case linux.TCP_QUICKACK:
|
|
if len(optVal) < sizeOfInt32 {
|
|
return syserr.ErrInvalidArgument
|
|
}
|
|
|
|
v := usermem.ByteOrder.Uint32(optVal)
|
|
return syserr.TranslateNetstackError(ep.SetSockOpt(tcpip.QuickAckOption(v)))
|
|
|
|
case linux.TCP_MAXSEG:
|
|
if len(optVal) < sizeOfInt32 {
|
|
return syserr.ErrInvalidArgument
|
|
}
|
|
|
|
v := usermem.ByteOrder.Uint32(optVal)
|
|
return syserr.TranslateNetstackError(ep.SetSockOpt(tcpip.MaxSegOption(v)))
|
|
|
|
case linux.TCP_KEEPIDLE:
|
|
if len(optVal) < sizeOfInt32 {
|
|
return syserr.ErrInvalidArgument
|
|
}
|
|
|
|
v := usermem.ByteOrder.Uint32(optVal)
|
|
if v < 1 || v > linux.MAX_TCP_KEEPIDLE {
|
|
return syserr.ErrInvalidArgument
|
|
}
|
|
return syserr.TranslateNetstackError(ep.SetSockOpt(tcpip.KeepaliveIdleOption(time.Second * time.Duration(v))))
|
|
|
|
case linux.TCP_KEEPINTVL:
|
|
if len(optVal) < sizeOfInt32 {
|
|
return syserr.ErrInvalidArgument
|
|
}
|
|
|
|
v := usermem.ByteOrder.Uint32(optVal)
|
|
if v < 1 || v > linux.MAX_TCP_KEEPINTVL {
|
|
return syserr.ErrInvalidArgument
|
|
}
|
|
return syserr.TranslateNetstackError(ep.SetSockOpt(tcpip.KeepaliveIntervalOption(time.Second * time.Duration(v))))
|
|
|
|
case linux.TCP_CONGESTION:
|
|
v := tcpip.CongestionControlOption(optVal)
|
|
if err := ep.SetSockOpt(v); err != nil {
|
|
return syserr.TranslateNetstackError(err)
|
|
}
|
|
return nil
|
|
|
|
case linux.TCP_REPAIR_OPTIONS:
|
|
t.Kernel().EmitUnimplementedEvent(t)
|
|
|
|
default:
|
|
emitUnimplementedEventTCP(t, name)
|
|
}
|
|
|
|
// Default to the old behavior; hand off to network stack.
|
|
return syserr.TranslateNetstackError(ep.SetSockOpt(struct{}{}))
|
|
}
|
|
|
|
// setSockOptIPv6 implements SetSockOpt when level is SOL_IPV6.
|
|
func setSockOptIPv6(t *kernel.Task, ep commonEndpoint, name int, optVal []byte) *syserr.Error {
|
|
switch name {
|
|
case linux.IPV6_V6ONLY:
|
|
if len(optVal) < sizeOfInt32 {
|
|
return syserr.ErrInvalidArgument
|
|
}
|
|
|
|
v := usermem.ByteOrder.Uint32(optVal)
|
|
return syserr.TranslateNetstackError(ep.SetSockOpt(tcpip.V6OnlyOption(v)))
|
|
|
|
case linux.IPV6_ADD_MEMBERSHIP,
|
|
linux.IPV6_DROP_MEMBERSHIP,
|
|
linux.IPV6_IPSEC_POLICY,
|
|
linux.IPV6_JOIN_ANYCAST,
|
|
linux.IPV6_LEAVE_ANYCAST,
|
|
linux.IPV6_PKTINFO,
|
|
linux.IPV6_ROUTER_ALERT,
|
|
linux.IPV6_XFRM_POLICY,
|
|
linux.MCAST_BLOCK_SOURCE,
|
|
linux.MCAST_JOIN_GROUP,
|
|
linux.MCAST_JOIN_SOURCE_GROUP,
|
|
linux.MCAST_LEAVE_GROUP,
|
|
linux.MCAST_LEAVE_SOURCE_GROUP,
|
|
linux.MCAST_UNBLOCK_SOURCE:
|
|
|
|
t.Kernel().EmitUnimplementedEvent(t)
|
|
|
|
case linux.IPV6_TCLASS:
|
|
if len(optVal) < sizeOfInt32 {
|
|
return syserr.ErrInvalidArgument
|
|
}
|
|
v := int32(usermem.ByteOrder.Uint32(optVal))
|
|
if v < -1 || v > 255 {
|
|
return syserr.ErrInvalidArgument
|
|
}
|
|
if v == -1 {
|
|
v = 0
|
|
}
|
|
return syserr.TranslateNetstackError(ep.SetSockOpt(tcpip.IPv6TrafficClassOption(v)))
|
|
|
|
default:
|
|
emitUnimplementedEventIPv6(t, name)
|
|
}
|
|
|
|
// Default to the old behavior; hand off to network stack.
|
|
return syserr.TranslateNetstackError(ep.SetSockOpt(struct{}{}))
|
|
}
|
|
|
|
var (
|
|
inetMulticastRequestSize = int(binary.Size(linux.InetMulticastRequest{}))
|
|
inetMulticastRequestWithNICSize = int(binary.Size(linux.InetMulticastRequestWithNIC{}))
|
|
)
|
|
|
|
// copyInMulticastRequest copies in a variable-size multicast request. The
|
|
// kernel determines which structure was passed by its length. IP_MULTICAST_IF
|
|
// supports ip_mreqn, ip_mreq and in_addr, while IP_ADD_MEMBERSHIP and
|
|
// IP_DROP_MEMBERSHIP only support ip_mreqn and ip_mreq. To handle this,
|
|
// allowAddr controls whether in_addr is accepted or rejected.
|
|
func copyInMulticastRequest(optVal []byte, allowAddr bool) (linux.InetMulticastRequestWithNIC, *syserr.Error) {
|
|
if len(optVal) < len(linux.InetAddr{}) {
|
|
return linux.InetMulticastRequestWithNIC{}, syserr.ErrInvalidArgument
|
|
}
|
|
|
|
if len(optVal) < inetMulticastRequestSize {
|
|
if !allowAddr {
|
|
return linux.InetMulticastRequestWithNIC{}, syserr.ErrInvalidArgument
|
|
}
|
|
|
|
var req linux.InetMulticastRequestWithNIC
|
|
copy(req.InterfaceAddr[:], optVal)
|
|
return req, nil
|
|
}
|
|
|
|
if len(optVal) >= inetMulticastRequestWithNICSize {
|
|
var req linux.InetMulticastRequestWithNIC
|
|
binary.Unmarshal(optVal[:inetMulticastRequestWithNICSize], usermem.ByteOrder, &req)
|
|
return req, nil
|
|
}
|
|
|
|
var req linux.InetMulticastRequestWithNIC
|
|
binary.Unmarshal(optVal[:inetMulticastRequestSize], usermem.ByteOrder, &req.InetMulticastRequest)
|
|
return req, nil
|
|
}
|
|
|
|
// parseIntOrChar copies either a 32-bit int or an 8-bit uint out of buf.
|
|
//
|
|
// net/ipv4/ip_sockglue.c:do_ip_setsockopt does this for its socket options.
|
|
func parseIntOrChar(buf []byte) (int32, *syserr.Error) {
|
|
if len(buf) == 0 {
|
|
return 0, syserr.ErrInvalidArgument
|
|
}
|
|
|
|
if len(buf) >= sizeOfInt32 {
|
|
return int32(usermem.ByteOrder.Uint32(buf)), nil
|
|
}
|
|
|
|
return int32(buf[0]), nil
|
|
}
|
|
|
|
// setSockOptIP implements SetSockOpt when level is SOL_IP.
|
|
func setSockOptIP(t *kernel.Task, ep commonEndpoint, name int, optVal []byte) *syserr.Error {
|
|
switch name {
|
|
case linux.IP_MULTICAST_TTL:
|
|
v, err := parseIntOrChar(optVal)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if v == -1 {
|
|
// Linux translates -1 to 1.
|
|
v = 1
|
|
}
|
|
if v < 0 || v > 255 {
|
|
return syserr.ErrInvalidArgument
|
|
}
|
|
return syserr.TranslateNetstackError(ep.SetSockOpt(tcpip.MulticastTTLOption(v)))
|
|
|
|
case linux.IP_ADD_MEMBERSHIP:
|
|
req, err := copyInMulticastRequest(optVal, false /* allowAddr */)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return syserr.TranslateNetstackError(ep.SetSockOpt(tcpip.AddMembershipOption{
|
|
NIC: tcpip.NICID(req.InterfaceIndex),
|
|
// TODO(igudger): Change AddMembership to use the standard
|
|
// any address representation.
|
|
InterfaceAddr: tcpip.Address(req.InterfaceAddr[:]),
|
|
MulticastAddr: tcpip.Address(req.MulticastAddr[:]),
|
|
}))
|
|
|
|
case linux.IP_DROP_MEMBERSHIP:
|
|
req, err := copyInMulticastRequest(optVal, false /* allowAddr */)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return syserr.TranslateNetstackError(ep.SetSockOpt(tcpip.RemoveMembershipOption{
|
|
NIC: tcpip.NICID(req.InterfaceIndex),
|
|
// TODO(igudger): Change DropMembership to use the standard
|
|
// any address representation.
|
|
InterfaceAddr: tcpip.Address(req.InterfaceAddr[:]),
|
|
MulticastAddr: tcpip.Address(req.MulticastAddr[:]),
|
|
}))
|
|
|
|
case linux.IP_MULTICAST_IF:
|
|
req, err := copyInMulticastRequest(optVal, true /* allowAddr */)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return syserr.TranslateNetstackError(ep.SetSockOpt(tcpip.MulticastInterfaceOption{
|
|
NIC: tcpip.NICID(req.InterfaceIndex),
|
|
InterfaceAddr: bytesToIPAddress(req.InterfaceAddr[:]),
|
|
}))
|
|
|
|
case linux.IP_MULTICAST_LOOP:
|
|
v, err := parseIntOrChar(optVal)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return syserr.TranslateNetstackError(ep.SetSockOpt(
|
|
tcpip.MulticastLoopOption(v != 0),
|
|
))
|
|
|
|
case linux.MCAST_JOIN_GROUP:
|
|
// FIXME(b/124219304): Implement MCAST_JOIN_GROUP.
|
|
t.Kernel().EmitUnimplementedEvent(t)
|
|
return syserr.ErrInvalidArgument
|
|
|
|
case linux.IP_TTL:
|
|
v, err := parseIntOrChar(optVal)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// -1 means default TTL.
|
|
if v == -1 {
|
|
v = 0
|
|
} else if v < 1 || v > 255 {
|
|
return syserr.ErrInvalidArgument
|
|
}
|
|
return syserr.TranslateNetstackError(ep.SetSockOpt(tcpip.TTLOption(v)))
|
|
|
|
case linux.IP_TOS:
|
|
if len(optVal) == 0 {
|
|
return nil
|
|
}
|
|
v, err := parseIntOrChar(optVal)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return syserr.TranslateNetstackError(ep.SetSockOpt(tcpip.IPv4TOSOption(v)))
|
|
|
|
case linux.IP_ADD_SOURCE_MEMBERSHIP,
|
|
linux.IP_BIND_ADDRESS_NO_PORT,
|
|
linux.IP_BLOCK_SOURCE,
|
|
linux.IP_CHECKSUM,
|
|
linux.IP_DROP_SOURCE_MEMBERSHIP,
|
|
linux.IP_FREEBIND,
|
|
linux.IP_HDRINCL,
|
|
linux.IP_IPSEC_POLICY,
|
|
linux.IP_MINTTL,
|
|
linux.IP_MSFILTER,
|
|
linux.IP_MTU_DISCOVER,
|
|
linux.IP_MULTICAST_ALL,
|
|
linux.IP_NODEFRAG,
|
|
linux.IP_OPTIONS,
|
|
linux.IP_PASSSEC,
|
|
linux.IP_PKTINFO,
|
|
linux.IP_RECVERR,
|
|
linux.IP_RECVFRAGSIZE,
|
|
linux.IP_RECVOPTS,
|
|
linux.IP_RECVORIGDSTADDR,
|
|
linux.IP_RECVTOS,
|
|
linux.IP_RECVTTL,
|
|
linux.IP_RETOPTS,
|
|
linux.IP_TRANSPARENT,
|
|
linux.IP_UNBLOCK_SOURCE,
|
|
linux.IP_UNICAST_IF,
|
|
linux.IP_XFRM_POLICY,
|
|
linux.MCAST_BLOCK_SOURCE,
|
|
linux.MCAST_JOIN_SOURCE_GROUP,
|
|
linux.MCAST_LEAVE_GROUP,
|
|
linux.MCAST_LEAVE_SOURCE_GROUP,
|
|
linux.MCAST_MSFILTER,
|
|
linux.MCAST_UNBLOCK_SOURCE:
|
|
|
|
t.Kernel().EmitUnimplementedEvent(t)
|
|
}
|
|
|
|
// Default to the old behavior; hand off to network stack.
|
|
return syserr.TranslateNetstackError(ep.SetSockOpt(struct{}{}))
|
|
}
|
|
|
|
// emitUnimplementedEventTCP emits unimplemented event if name is valid. This
|
|
// function contains names that are common between Get and SetSockOpt when
|
|
// level is SOL_TCP.
|
|
func emitUnimplementedEventTCP(t *kernel.Task, name int) {
|
|
switch name {
|
|
case linux.TCP_CONGESTION,
|
|
linux.TCP_CORK,
|
|
linux.TCP_DEFER_ACCEPT,
|
|
linux.TCP_FASTOPEN,
|
|
linux.TCP_FASTOPEN_CONNECT,
|
|
linux.TCP_FASTOPEN_KEY,
|
|
linux.TCP_FASTOPEN_NO_COOKIE,
|
|
linux.TCP_KEEPCNT,
|
|
linux.TCP_KEEPIDLE,
|
|
linux.TCP_KEEPINTVL,
|
|
linux.TCP_LINGER2,
|
|
linux.TCP_MAXSEG,
|
|
linux.TCP_QUEUE_SEQ,
|
|
linux.TCP_QUICKACK,
|
|
linux.TCP_REPAIR,
|
|
linux.TCP_REPAIR_QUEUE,
|
|
linux.TCP_REPAIR_WINDOW,
|
|
linux.TCP_SAVED_SYN,
|
|
linux.TCP_SAVE_SYN,
|
|
linux.TCP_SYNCNT,
|
|
linux.TCP_THIN_DUPACK,
|
|
linux.TCP_THIN_LINEAR_TIMEOUTS,
|
|
linux.TCP_TIMESTAMP,
|
|
linux.TCP_ULP,
|
|
linux.TCP_USER_TIMEOUT,
|
|
linux.TCP_WINDOW_CLAMP:
|
|
|
|
t.Kernel().EmitUnimplementedEvent(t)
|
|
}
|
|
}
|
|
|
|
// emitUnimplementedEventIPv6 emits unimplemented event if name is valid. It
|
|
// contains names that are common between Get and SetSockOpt when level is
|
|
// SOL_IPV6.
|
|
func emitUnimplementedEventIPv6(t *kernel.Task, name int) {
|
|
switch name {
|
|
case linux.IPV6_2292DSTOPTS,
|
|
linux.IPV6_2292HOPLIMIT,
|
|
linux.IPV6_2292HOPOPTS,
|
|
linux.IPV6_2292PKTINFO,
|
|
linux.IPV6_2292PKTOPTIONS,
|
|
linux.IPV6_2292RTHDR,
|
|
linux.IPV6_ADDR_PREFERENCES,
|
|
linux.IPV6_AUTOFLOWLABEL,
|
|
linux.IPV6_DONTFRAG,
|
|
linux.IPV6_DSTOPTS,
|
|
linux.IPV6_FLOWINFO,
|
|
linux.IPV6_FLOWINFO_SEND,
|
|
linux.IPV6_FLOWLABEL_MGR,
|
|
linux.IPV6_FREEBIND,
|
|
linux.IPV6_HOPOPTS,
|
|
linux.IPV6_MINHOPCOUNT,
|
|
linux.IPV6_MTU,
|
|
linux.IPV6_MTU_DISCOVER,
|
|
linux.IPV6_MULTICAST_ALL,
|
|
linux.IPV6_MULTICAST_HOPS,
|
|
linux.IPV6_MULTICAST_IF,
|
|
linux.IPV6_MULTICAST_LOOP,
|
|
linux.IPV6_RECVDSTOPTS,
|
|
linux.IPV6_RECVERR,
|
|
linux.IPV6_RECVFRAGSIZE,
|
|
linux.IPV6_RECVHOPLIMIT,
|
|
linux.IPV6_RECVHOPOPTS,
|
|
linux.IPV6_RECVORIGDSTADDR,
|
|
linux.IPV6_RECVPATHMTU,
|
|
linux.IPV6_RECVPKTINFO,
|
|
linux.IPV6_RECVRTHDR,
|
|
linux.IPV6_RECVTCLASS,
|
|
linux.IPV6_RTHDR,
|
|
linux.IPV6_RTHDRDSTOPTS,
|
|
linux.IPV6_TCLASS,
|
|
linux.IPV6_TRANSPARENT,
|
|
linux.IPV6_UNICAST_HOPS,
|
|
linux.IPV6_UNICAST_IF,
|
|
linux.MCAST_MSFILTER,
|
|
linux.IPV6_ADDRFORM:
|
|
|
|
t.Kernel().EmitUnimplementedEvent(t)
|
|
}
|
|
}
|
|
|
|
// emitUnimplementedEventIP emits unimplemented event if name is valid. It
|
|
// contains names that are common between Get and SetSockOpt when level is
|
|
// SOL_IP.
|
|
func emitUnimplementedEventIP(t *kernel.Task, name int) {
|
|
switch name {
|
|
case linux.IP_TOS,
|
|
linux.IP_TTL,
|
|
linux.IP_HDRINCL,
|
|
linux.IP_OPTIONS,
|
|
linux.IP_ROUTER_ALERT,
|
|
linux.IP_RECVOPTS,
|
|
linux.IP_RETOPTS,
|
|
linux.IP_PKTINFO,
|
|
linux.IP_PKTOPTIONS,
|
|
linux.IP_MTU_DISCOVER,
|
|
linux.IP_RECVERR,
|
|
linux.IP_RECVTTL,
|
|
linux.IP_RECVTOS,
|
|
linux.IP_MTU,
|
|
linux.IP_FREEBIND,
|
|
linux.IP_IPSEC_POLICY,
|
|
linux.IP_XFRM_POLICY,
|
|
linux.IP_PASSSEC,
|
|
linux.IP_TRANSPARENT,
|
|
linux.IP_ORIGDSTADDR,
|
|
linux.IP_MINTTL,
|
|
linux.IP_NODEFRAG,
|
|
linux.IP_CHECKSUM,
|
|
linux.IP_BIND_ADDRESS_NO_PORT,
|
|
linux.IP_RECVFRAGSIZE,
|
|
linux.IP_MULTICAST_IF,
|
|
linux.IP_MULTICAST_TTL,
|
|
linux.IP_MULTICAST_LOOP,
|
|
linux.IP_ADD_MEMBERSHIP,
|
|
linux.IP_DROP_MEMBERSHIP,
|
|
linux.IP_UNBLOCK_SOURCE,
|
|
linux.IP_BLOCK_SOURCE,
|
|
linux.IP_ADD_SOURCE_MEMBERSHIP,
|
|
linux.IP_DROP_SOURCE_MEMBERSHIP,
|
|
linux.IP_MSFILTER,
|
|
linux.MCAST_JOIN_GROUP,
|
|
linux.MCAST_BLOCK_SOURCE,
|
|
linux.MCAST_UNBLOCK_SOURCE,
|
|
linux.MCAST_LEAVE_GROUP,
|
|
linux.MCAST_JOIN_SOURCE_GROUP,
|
|
linux.MCAST_LEAVE_SOURCE_GROUP,
|
|
linux.MCAST_MSFILTER,
|
|
linux.IP_MULTICAST_ALL,
|
|
linux.IP_UNICAST_IF:
|
|
|
|
t.Kernel().EmitUnimplementedEvent(t)
|
|
}
|
|
}
|
|
|
|
// isLinkLocal determines if the given IPv6 address is link-local. This is the
|
|
// case when it has the fe80::/10 prefix. This check is used to determine when
|
|
// the NICID is relevant for a given IPv6 address.
|
|
func isLinkLocal(addr tcpip.Address) bool {
|
|
return len(addr) >= 2 && addr[0] == 0xfe && addr[1]&0xc0 == 0x80
|
|
}
|
|
|
|
// ConvertAddress converts the given address to a native format.
|
|
func ConvertAddress(family int, addr tcpip.FullAddress) (linux.SockAddr, uint32) {
|
|
switch family {
|
|
case linux.AF_UNIX:
|
|
var out linux.SockAddrUnix
|
|
out.Family = linux.AF_UNIX
|
|
l := len([]byte(addr.Addr))
|
|
for i := 0; i < l; i++ {
|
|
out.Path[i] = int8(addr.Addr[i])
|
|
}
|
|
|
|
// Linux returns the used length of the address struct (including the
|
|
// null terminator) for filesystem paths. The Family field is 2 bytes.
|
|
// It is sometimes allowed to exclude the null terminator if the
|
|
// address length is the max. Abstract and empty paths always return
|
|
// the full exact length.
|
|
if l == 0 || out.Path[0] == 0 || l == len(out.Path) {
|
|
return &out, uint32(2 + l)
|
|
}
|
|
return &out, uint32(3 + l)
|
|
case linux.AF_INET:
|
|
var out linux.SockAddrInet
|
|
copy(out.Addr[:], addr.Addr)
|
|
out.Family = linux.AF_INET
|
|
out.Port = htons(addr.Port)
|
|
return &out, uint32(binary.Size(out))
|
|
case linux.AF_INET6:
|
|
var out linux.SockAddrInet6
|
|
if len(addr.Addr) == 4 {
|
|
// Copy address is v4-mapped format.
|
|
copy(out.Addr[12:], addr.Addr)
|
|
out.Addr[10] = 0xff
|
|
out.Addr[11] = 0xff
|
|
} else {
|
|
copy(out.Addr[:], addr.Addr)
|
|
}
|
|
out.Family = linux.AF_INET6
|
|
out.Port = htons(addr.Port)
|
|
if isLinkLocal(addr.Addr) {
|
|
out.Scope_id = uint32(addr.NIC)
|
|
}
|
|
return &out, uint32(binary.Size(out))
|
|
default:
|
|
return nil, 0
|
|
}
|
|
}
|
|
|
|
// GetSockName implements the linux syscall getsockname(2) for sockets backed by
|
|
// tcpip.Endpoint.
|
|
func (s *SocketOperations) GetSockName(t *kernel.Task) (linux.SockAddr, uint32, *syserr.Error) {
|
|
addr, err := s.Endpoint.GetLocalAddress()
|
|
if err != nil {
|
|
return nil, 0, syserr.TranslateNetstackError(err)
|
|
}
|
|
|
|
a, l := ConvertAddress(s.family, addr)
|
|
return a, l, nil
|
|
}
|
|
|
|
// GetPeerName implements the linux syscall getpeername(2) for sockets backed by
|
|
// tcpip.Endpoint.
|
|
func (s *SocketOperations) GetPeerName(t *kernel.Task) (linux.SockAddr, uint32, *syserr.Error) {
|
|
addr, err := s.Endpoint.GetRemoteAddress()
|
|
if err != nil {
|
|
return nil, 0, syserr.TranslateNetstackError(err)
|
|
}
|
|
|
|
a, l := ConvertAddress(s.family, addr)
|
|
return a, l, nil
|
|
}
|
|
|
|
// coalescingRead is the fast path for non-blocking, non-peek, stream-based
|
|
// case. It coalesces as many packets as possible before returning to the
|
|
// caller.
|
|
//
|
|
// Precondition: s.readMu must be locked.
|
|
func (s *SocketOperations) coalescingRead(ctx context.Context, dst usermem.IOSequence, discard bool) (int, *syserr.Error) {
|
|
var err *syserr.Error
|
|
var copied int
|
|
|
|
// Copy as many views as possible into the user-provided buffer.
|
|
for dst.NumBytes() != 0 {
|
|
err = s.fetchReadView()
|
|
if err != nil {
|
|
break
|
|
}
|
|
|
|
var n int
|
|
var e error
|
|
if discard {
|
|
n = len(s.readView)
|
|
if int64(n) > dst.NumBytes() {
|
|
n = int(dst.NumBytes())
|
|
}
|
|
} else {
|
|
n, e = dst.CopyOut(ctx, s.readView)
|
|
// Set the control message, even if 0 bytes were read.
|
|
if e == nil {
|
|
s.updateTimestamp()
|
|
}
|
|
}
|
|
copied += n
|
|
s.readView.TrimFront(n)
|
|
dst = dst.DropFirst(n)
|
|
if e != nil {
|
|
err = syserr.FromError(e)
|
|
break
|
|
}
|
|
}
|
|
|
|
// If we managed to copy something, we must deliver it.
|
|
if copied > 0 {
|
|
s.Endpoint.ModerateRecvBuf(copied)
|
|
return copied, nil
|
|
}
|
|
|
|
return 0, err
|
|
}
|
|
|
|
func (s *SocketOperations) fillCmsgInq(cmsg *socket.ControlMessages) {
|
|
if !s.sockOptInq {
|
|
return
|
|
}
|
|
rcvBufUsed, err := s.Endpoint.GetSockOptInt(tcpip.ReceiveQueueSizeOption)
|
|
if err != nil {
|
|
return
|
|
}
|
|
cmsg.IP.HasInq = true
|
|
cmsg.IP.Inq = int32(len(s.readView) + rcvBufUsed)
|
|
}
|
|
|
|
// nonBlockingRead issues a non-blocking read.
|
|
//
|
|
// TODO(b/78348848): Support timestamps for stream sockets.
|
|
func (s *SocketOperations) nonBlockingRead(ctx context.Context, dst usermem.IOSequence, peek, trunc, senderRequested bool) (int, int, linux.SockAddr, uint32, socket.ControlMessages, *syserr.Error) {
|
|
isPacket := s.isPacketBased()
|
|
|
|
// Fast path for regular reads from stream (e.g., TCP) endpoints. Note
|
|
// that senderRequested is ignored for stream sockets.
|
|
if !peek && !isPacket {
|
|
// TCP sockets discard the data if MSG_TRUNC is set.
|
|
//
|
|
// This behavior is documented in man 7 tcp:
|
|
// Since version 2.4, Linux supports the use of MSG_TRUNC in the flags
|
|
// argument of recv(2) (and recvmsg(2)). This flag causes the received
|
|
// bytes of data to be discarded, rather than passed back in a
|
|
// caller-supplied buffer.
|
|
s.readMu.Lock()
|
|
n, err := s.coalescingRead(ctx, dst, trunc)
|
|
s.readMu.Unlock()
|
|
cmsg := s.controlMessages()
|
|
s.fillCmsgInq(&cmsg)
|
|
return n, 0, nil, 0, cmsg, err
|
|
}
|
|
|
|
s.readMu.Lock()
|
|
defer s.readMu.Unlock()
|
|
|
|
if err := s.fetchReadView(); err != nil {
|
|
return 0, 0, nil, 0, socket.ControlMessages{}, err
|
|
}
|
|
|
|
if !isPacket && peek && trunc {
|
|
// MSG_TRUNC with MSG_PEEK on a TCP socket returns the
|
|
// amount that could be read.
|
|
rql, err := s.Endpoint.GetSockOptInt(tcpip.ReceiveQueueSizeOption)
|
|
if err != nil {
|
|
return 0, 0, nil, 0, socket.ControlMessages{}, syserr.TranslateNetstackError(err)
|
|
}
|
|
available := len(s.readView) + int(rql)
|
|
bufLen := int(dst.NumBytes())
|
|
if available < bufLen {
|
|
return available, 0, nil, 0, socket.ControlMessages{}, nil
|
|
}
|
|
return bufLen, 0, nil, 0, socket.ControlMessages{}, nil
|
|
}
|
|
|
|
n, err := dst.CopyOut(ctx, s.readView)
|
|
// Set the control message, even if 0 bytes were read.
|
|
if err == nil {
|
|
s.updateTimestamp()
|
|
}
|
|
var addr linux.SockAddr
|
|
var addrLen uint32
|
|
if isPacket && senderRequested {
|
|
addr, addrLen = ConvertAddress(s.family, s.sender)
|
|
}
|
|
|
|
if peek {
|
|
if l := len(s.readView); trunc && l > n {
|
|
// isPacket must be true.
|
|
return l, linux.MSG_TRUNC, addr, addrLen, s.controlMessages(), syserr.FromError(err)
|
|
}
|
|
|
|
if isPacket || err != nil {
|
|
return n, 0, addr, addrLen, s.controlMessages(), syserr.FromError(err)
|
|
}
|
|
|
|
// We need to peek beyond the first message.
|
|
dst = dst.DropFirst(n)
|
|
num, err := dst.CopyOutFrom(ctx, safemem.FromVecReaderFunc{func(dsts [][]byte) (int64, error) {
|
|
n, _, err := s.Endpoint.Peek(dsts)
|
|
// TODO(b/78348848): Handle peek timestamp.
|
|
if err != nil {
|
|
return int64(n), syserr.TranslateNetstackError(err).ToError()
|
|
}
|
|
return int64(n), nil
|
|
}})
|
|
n += int(num)
|
|
if err == syserror.ErrWouldBlock && n > 0 {
|
|
// We got some data, so no need to return an error.
|
|
err = nil
|
|
}
|
|
return n, 0, nil, 0, s.controlMessages(), syserr.FromError(err)
|
|
}
|
|
|
|
var msgLen int
|
|
if isPacket {
|
|
msgLen = len(s.readView)
|
|
s.readView = nil
|
|
} else {
|
|
msgLen = int(n)
|
|
s.readView.TrimFront(int(n))
|
|
}
|
|
|
|
var flags int
|
|
if msgLen > int(n) {
|
|
flags |= linux.MSG_TRUNC
|
|
}
|
|
|
|
if trunc {
|
|
n = msgLen
|
|
}
|
|
|
|
cmsg := s.controlMessages()
|
|
s.fillCmsgInq(&cmsg)
|
|
return n, flags, addr, addrLen, cmsg, syserr.FromError(err)
|
|
}
|
|
|
|
func (s *SocketOperations) controlMessages() socket.ControlMessages {
|
|
return socket.ControlMessages{IP: tcpip.ControlMessages{HasTimestamp: s.readCM.HasTimestamp && s.sockOptTimestamp, Timestamp: s.readCM.Timestamp}}
|
|
}
|
|
|
|
// updateTimestamp sets the timestamp for SIOCGSTAMP. It should be called after
|
|
// successfully writing packet data out to userspace.
|
|
//
|
|
// Precondition: s.readMu must be locked.
|
|
func (s *SocketOperations) updateTimestamp() {
|
|
// Save the SIOCGSTAMP timestamp only if SO_TIMESTAMP is disabled.
|
|
if !s.sockOptTimestamp {
|
|
s.timestampValid = true
|
|
s.timestampNS = s.readCM.Timestamp
|
|
}
|
|
}
|
|
|
|
// RecvMsg implements the linux syscall recvmsg(2) for sockets backed by
|
|
// tcpip.Endpoint.
|
|
func (s *SocketOperations) RecvMsg(t *kernel.Task, dst usermem.IOSequence, flags int, haveDeadline bool, deadline ktime.Time, senderRequested bool, controlDataLen uint64) (n int, msgFlags int, senderAddr linux.SockAddr, senderAddrLen uint32, controlMessages socket.ControlMessages, err *syserr.Error) {
|
|
trunc := flags&linux.MSG_TRUNC != 0
|
|
peek := flags&linux.MSG_PEEK != 0
|
|
dontWait := flags&linux.MSG_DONTWAIT != 0
|
|
waitAll := flags&linux.MSG_WAITALL != 0
|
|
if senderRequested && !s.isPacketBased() {
|
|
// Stream sockets ignore the sender address.
|
|
senderRequested = false
|
|
}
|
|
n, msgFlags, senderAddr, senderAddrLen, controlMessages, err = s.nonBlockingRead(t, dst, peek, trunc, senderRequested)
|
|
|
|
if s.isPacketBased() && err == syserr.ErrClosedForReceive && flags&linux.MSG_DONTWAIT != 0 {
|
|
// In this situation we should return EAGAIN.
|
|
return 0, 0, nil, 0, socket.ControlMessages{}, syserr.ErrTryAgain
|
|
}
|
|
|
|
if err != nil && (err != syserr.ErrWouldBlock || dontWait) {
|
|
// Read failed and we should not retry.
|
|
return 0, 0, nil, 0, socket.ControlMessages{}, err
|
|
}
|
|
|
|
if err == nil && (dontWait || !waitAll || s.isPacketBased() || int64(n) >= dst.NumBytes()) {
|
|
// We got all the data we need.
|
|
return
|
|
}
|
|
|
|
// Don't overwrite any data we received.
|
|
dst = dst.DropFirst(n)
|
|
|
|
// We'll have to block. Register for notifications and keep trying to
|
|
// send all the data.
|
|
e, ch := waiter.NewChannelEntry(nil)
|
|
s.EventRegister(&e, waiter.EventIn)
|
|
defer s.EventUnregister(&e)
|
|
|
|
for {
|
|
var rn int
|
|
rn, msgFlags, senderAddr, senderAddrLen, controlMessages, err = s.nonBlockingRead(t, dst, peek, trunc, senderRequested)
|
|
n += rn
|
|
if err != nil && err != syserr.ErrWouldBlock {
|
|
// Always stop on errors other than would block as we generally
|
|
// won't be able to get any more data. Eat the error if we got
|
|
// any data.
|
|
if n > 0 {
|
|
err = nil
|
|
}
|
|
return
|
|
}
|
|
if err == nil && (s.isPacketBased() || !waitAll || int64(rn) >= dst.NumBytes()) {
|
|
// We got all the data we need.
|
|
return
|
|
}
|
|
dst = dst.DropFirst(rn)
|
|
|
|
if err := t.BlockWithDeadline(ch, haveDeadline, deadline); err != nil {
|
|
if n > 0 {
|
|
return n, msgFlags, senderAddr, senderAddrLen, controlMessages, nil
|
|
}
|
|
if err == syserror.ETIMEDOUT {
|
|
return 0, 0, nil, 0, socket.ControlMessages{}, syserr.ErrTryAgain
|
|
}
|
|
return 0, 0, nil, 0, socket.ControlMessages{}, syserr.FromError(err)
|
|
}
|
|
}
|
|
}
|
|
|
|
// SendMsg implements the linux syscall sendmsg(2) for sockets backed by
|
|
// tcpip.Endpoint.
|
|
func (s *SocketOperations) SendMsg(t *kernel.Task, src usermem.IOSequence, to []byte, flags int, haveDeadline bool, deadline ktime.Time, controlMessages socket.ControlMessages) (int, *syserr.Error) {
|
|
// Reject Unix control messages.
|
|
if !controlMessages.Unix.Empty() {
|
|
return 0, syserr.ErrInvalidArgument
|
|
}
|
|
|
|
var addr *tcpip.FullAddress
|
|
if len(to) > 0 {
|
|
addrBuf, _, err := AddressAndFamily(s.family, to, true /* strict */)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
addr = &addrBuf
|
|
}
|
|
|
|
opts := tcpip.WriteOptions{
|
|
To: addr,
|
|
More: flags&linux.MSG_MORE != 0,
|
|
EndOfRecord: flags&linux.MSG_EOR != 0,
|
|
}
|
|
|
|
v := &ioSequencePayload{t, src}
|
|
n, resCh, err := s.Endpoint.Write(v, opts)
|
|
if resCh != nil {
|
|
if err := t.Block(resCh); err != nil {
|
|
return 0, syserr.FromError(err)
|
|
}
|
|
n, _, err = s.Endpoint.Write(v, opts)
|
|
}
|
|
dontWait := flags&linux.MSG_DONTWAIT != 0
|
|
if err == nil && (n >= v.src.NumBytes() || dontWait) {
|
|
// Complete write.
|
|
return int(n), nil
|
|
}
|
|
if err != nil && (err != tcpip.ErrWouldBlock || dontWait) {
|
|
return int(n), syserr.TranslateNetstackError(err)
|
|
}
|
|
|
|
// We'll have to block. Register for notification and keep trying to
|
|
// send all the data.
|
|
e, ch := waiter.NewChannelEntry(nil)
|
|
s.EventRegister(&e, waiter.EventOut)
|
|
defer s.EventUnregister(&e)
|
|
|
|
v.DropFirst(int(n))
|
|
total := n
|
|
for {
|
|
n, _, err = s.Endpoint.Write(v, opts)
|
|
v.DropFirst(int(n))
|
|
total += n
|
|
|
|
if err != nil && err != tcpip.ErrWouldBlock && total == 0 {
|
|
return 0, syserr.TranslateNetstackError(err)
|
|
}
|
|
|
|
if err == nil && v.src.NumBytes() == 0 || err != nil && err != tcpip.ErrWouldBlock {
|
|
return int(total), nil
|
|
}
|
|
|
|
if err := t.BlockWithDeadline(ch, haveDeadline, deadline); err != nil {
|
|
if err == syserror.ETIMEDOUT {
|
|
return int(total), syserr.ErrTryAgain
|
|
}
|
|
// handleIOError will consume errors from t.Block if needed.
|
|
return int(total), syserr.FromError(err)
|
|
}
|
|
}
|
|
}
|
|
|
|
// Ioctl implements fs.FileOperations.Ioctl.
|
|
func (s *SocketOperations) Ioctl(ctx context.Context, _ *fs.File, io usermem.IO, args arch.SyscallArguments) (uintptr, error) {
|
|
// SIOCGSTAMP is implemented by netstack rather than all commonEndpoint
|
|
// sockets.
|
|
// TODO(b/78348848): Add a commonEndpoint method to support SIOCGSTAMP.
|
|
switch args[1].Int() {
|
|
case syscall.SIOCGSTAMP:
|
|
s.readMu.Lock()
|
|
defer s.readMu.Unlock()
|
|
if !s.timestampValid {
|
|
return 0, syserror.ENOENT
|
|
}
|
|
|
|
tv := linux.NsecToTimeval(s.timestampNS)
|
|
_, err := usermem.CopyObjectOut(ctx, io, args[2].Pointer(), &tv, usermem.IOOpts{
|
|
AddressSpaceActive: true,
|
|
})
|
|
return 0, err
|
|
|
|
case linux.TIOCINQ:
|
|
v, terr := s.Endpoint.GetSockOptInt(tcpip.ReceiveQueueSizeOption)
|
|
if terr != nil {
|
|
return 0, syserr.TranslateNetstackError(terr).ToError()
|
|
}
|
|
|
|
// Add bytes removed from the endpoint but not yet sent to the caller.
|
|
v += len(s.readView)
|
|
|
|
if v > math.MaxInt32 {
|
|
v = math.MaxInt32
|
|
}
|
|
|
|
// Copy result to user-space.
|
|
_, err := usermem.CopyObjectOut(ctx, io, args[2].Pointer(), int32(v), usermem.IOOpts{
|
|
AddressSpaceActive: true,
|
|
})
|
|
return 0, err
|
|
}
|
|
|
|
return Ioctl(ctx, s.Endpoint, io, args)
|
|
}
|
|
|
|
// Ioctl performs a socket ioctl.
|
|
func Ioctl(ctx context.Context, ep commonEndpoint, io usermem.IO, args arch.SyscallArguments) (uintptr, error) {
|
|
switch arg := int(args[1].Int()); arg {
|
|
case syscall.SIOCGIFFLAGS,
|
|
syscall.SIOCGIFADDR,
|
|
syscall.SIOCGIFBRDADDR,
|
|
syscall.SIOCGIFDSTADDR,
|
|
syscall.SIOCGIFHWADDR,
|
|
syscall.SIOCGIFINDEX,
|
|
syscall.SIOCGIFMAP,
|
|
syscall.SIOCGIFMETRIC,
|
|
syscall.SIOCGIFMTU,
|
|
syscall.SIOCGIFNAME,
|
|
syscall.SIOCGIFNETMASK,
|
|
syscall.SIOCGIFTXQLEN:
|
|
|
|
var ifr linux.IFReq
|
|
if _, err := usermem.CopyObjectIn(ctx, io, args[2].Pointer(), &ifr, usermem.IOOpts{
|
|
AddressSpaceActive: true,
|
|
}); err != nil {
|
|
return 0, err
|
|
}
|
|
if err := interfaceIoctl(ctx, io, arg, &ifr); err != nil {
|
|
return 0, err.ToError()
|
|
}
|
|
_, err := usermem.CopyObjectOut(ctx, io, args[2].Pointer(), &ifr, usermem.IOOpts{
|
|
AddressSpaceActive: true,
|
|
})
|
|
return 0, err
|
|
|
|
case syscall.SIOCGIFCONF:
|
|
// Return a list of interface addresses or the buffer size
|
|
// necessary to hold the list.
|
|
var ifc linux.IFConf
|
|
if _, err := usermem.CopyObjectIn(ctx, io, args[2].Pointer(), &ifc, usermem.IOOpts{
|
|
AddressSpaceActive: true,
|
|
}); err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
if err := ifconfIoctl(ctx, io, &ifc); err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
_, err := usermem.CopyObjectOut(ctx, io, args[2].Pointer(), ifc, usermem.IOOpts{
|
|
AddressSpaceActive: true,
|
|
})
|
|
|
|
return 0, err
|
|
|
|
case linux.TIOCINQ:
|
|
v, terr := ep.GetSockOptInt(tcpip.ReceiveQueueSizeOption)
|
|
if terr != nil {
|
|
return 0, syserr.TranslateNetstackError(terr).ToError()
|
|
}
|
|
|
|
if v > math.MaxInt32 {
|
|
v = math.MaxInt32
|
|
}
|
|
// Copy result to user-space.
|
|
_, err := usermem.CopyObjectOut(ctx, io, args[2].Pointer(), int32(v), usermem.IOOpts{
|
|
AddressSpaceActive: true,
|
|
})
|
|
return 0, err
|
|
|
|
case linux.TIOCOUTQ:
|
|
v, terr := ep.GetSockOptInt(tcpip.SendQueueSizeOption)
|
|
if terr != nil {
|
|
return 0, syserr.TranslateNetstackError(terr).ToError()
|
|
}
|
|
|
|
if v > math.MaxInt32 {
|
|
v = math.MaxInt32
|
|
}
|
|
|
|
// Copy result to user-space.
|
|
_, err := usermem.CopyObjectOut(ctx, io, args[2].Pointer(), int32(v), usermem.IOOpts{
|
|
AddressSpaceActive: true,
|
|
})
|
|
return 0, err
|
|
|
|
case linux.SIOCGIFMEM, linux.SIOCGIFPFLAGS, linux.SIOCGMIIPHY, linux.SIOCGMIIREG:
|
|
unimpl.EmitUnimplementedEvent(ctx)
|
|
}
|
|
|
|
return 0, syserror.ENOTTY
|
|
}
|
|
|
|
// interfaceIoctl implements interface requests.
|
|
func interfaceIoctl(ctx context.Context, io usermem.IO, arg int, ifr *linux.IFReq) *syserr.Error {
|
|
var (
|
|
iface inet.Interface
|
|
index int32
|
|
found bool
|
|
)
|
|
|
|
// Find the relevant device.
|
|
stack := inet.StackFromContext(ctx)
|
|
if stack == nil {
|
|
return syserr.ErrNoDevice
|
|
}
|
|
|
|
// SIOCGIFNAME uses ifr.ifr_ifindex rather than ifr.ifr_name to
|
|
// identify a device.
|
|
if arg == syscall.SIOCGIFNAME {
|
|
// Gets the name of the interface given the interface index
|
|
// stored in ifr_ifindex.
|
|
index = int32(usermem.ByteOrder.Uint32(ifr.Data[:4]))
|
|
if iface, ok := stack.Interfaces()[index]; ok {
|
|
ifr.SetName(iface.Name)
|
|
return nil
|
|
}
|
|
return syserr.ErrNoDevice
|
|
}
|
|
|
|
// Find the relevant device.
|
|
for index, iface = range stack.Interfaces() {
|
|
if iface.Name == ifr.Name() {
|
|
found = true
|
|
break
|
|
}
|
|
}
|
|
if !found {
|
|
return syserr.ErrNoDevice
|
|
}
|
|
|
|
switch arg {
|
|
case syscall.SIOCGIFINDEX:
|
|
// Copy out the index to the data.
|
|
usermem.ByteOrder.PutUint32(ifr.Data[:], uint32(index))
|
|
|
|
case syscall.SIOCGIFHWADDR:
|
|
// Copy the hardware address out.
|
|
ifr.Data[0] = 6 // IEEE802.2 arp type.
|
|
ifr.Data[1] = 0
|
|
n := copy(ifr.Data[2:], iface.Addr)
|
|
for i := 2 + n; i < len(ifr.Data); i++ {
|
|
ifr.Data[i] = 0 // Clear padding.
|
|
}
|
|
usermem.ByteOrder.PutUint16(ifr.Data[:2], uint16(n))
|
|
|
|
case syscall.SIOCGIFFLAGS:
|
|
f, err := interfaceStatusFlags(stack, iface.Name)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
// Drop the flags that don't fit in the size that we need to return. This
|
|
// matches Linux behavior.
|
|
usermem.ByteOrder.PutUint16(ifr.Data[:2], uint16(f))
|
|
|
|
case syscall.SIOCGIFADDR:
|
|
// Copy the IPv4 address out.
|
|
for _, addr := range stack.InterfaceAddrs()[index] {
|
|
// This ioctl is only compatible with AF_INET addresses.
|
|
if addr.Family != linux.AF_INET {
|
|
continue
|
|
}
|
|
copy(ifr.Data[4:8], addr.Addr)
|
|
break
|
|
}
|
|
|
|
case syscall.SIOCGIFMETRIC:
|
|
// Gets the metric of the device. As per netdevice(7), this
|
|
// always just sets ifr_metric to 0.
|
|
usermem.ByteOrder.PutUint32(ifr.Data[:4], 0)
|
|
|
|
case syscall.SIOCGIFMTU:
|
|
// Gets the MTU of the device.
|
|
usermem.ByteOrder.PutUint32(ifr.Data[:4], iface.MTU)
|
|
|
|
case syscall.SIOCGIFMAP:
|
|
// Gets the hardware parameters of the device.
|
|
// TODO(gvisor.dev/issue/505): Implement.
|
|
|
|
case syscall.SIOCGIFTXQLEN:
|
|
// Gets the transmit queue length of the device.
|
|
// TODO(gvisor.dev/issue/505): Implement.
|
|
|
|
case syscall.SIOCGIFDSTADDR:
|
|
// Gets the destination address of a point-to-point device.
|
|
// TODO(gvisor.dev/issue/505): Implement.
|
|
|
|
case syscall.SIOCGIFBRDADDR:
|
|
// Gets the broadcast address of a device.
|
|
// TODO(gvisor.dev/issue/505): Implement.
|
|
|
|
case syscall.SIOCGIFNETMASK:
|
|
// Gets the network mask of a device.
|
|
for _, addr := range stack.InterfaceAddrs()[index] {
|
|
// This ioctl is only compatible with AF_INET addresses.
|
|
if addr.Family != linux.AF_INET {
|
|
continue
|
|
}
|
|
// Populate ifr.ifr_netmask (type sockaddr).
|
|
usermem.ByteOrder.PutUint16(ifr.Data[0:2], uint16(linux.AF_INET))
|
|
usermem.ByteOrder.PutUint16(ifr.Data[2:4], 0)
|
|
var mask uint32 = 0xffffffff << (32 - addr.PrefixLen)
|
|
// Netmask is expected to be returned as a big endian
|
|
// value.
|
|
binary.BigEndian.PutUint32(ifr.Data[4:8], mask)
|
|
break
|
|
}
|
|
|
|
default:
|
|
// Not a valid call.
|
|
return syserr.ErrInvalidArgument
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// ifconfIoctl populates a struct ifconf for the SIOCGIFCONF ioctl.
|
|
func ifconfIoctl(ctx context.Context, io usermem.IO, ifc *linux.IFConf) error {
|
|
// If Ptr is NULL, return the necessary buffer size via Len.
|
|
// Otherwise, write up to Len bytes starting at Ptr containing ifreq
|
|
// structs.
|
|
stack := inet.StackFromContext(ctx)
|
|
if stack == nil {
|
|
return syserr.ErrNoDevice.ToError()
|
|
}
|
|
|
|
if ifc.Ptr == 0 {
|
|
ifc.Len = int32(len(stack.Interfaces())) * int32(linux.SizeOfIFReq)
|
|
return nil
|
|
}
|
|
|
|
max := ifc.Len
|
|
ifc.Len = 0
|
|
for key, ifaceAddrs := range stack.InterfaceAddrs() {
|
|
iface := stack.Interfaces()[key]
|
|
for _, ifaceAddr := range ifaceAddrs {
|
|
// Don't write past the end of the buffer.
|
|
if ifc.Len+int32(linux.SizeOfIFReq) > max {
|
|
break
|
|
}
|
|
if ifaceAddr.Family != linux.AF_INET {
|
|
continue
|
|
}
|
|
|
|
// Populate ifr.ifr_addr.
|
|
ifr := linux.IFReq{}
|
|
ifr.SetName(iface.Name)
|
|
usermem.ByteOrder.PutUint16(ifr.Data[0:2], uint16(ifaceAddr.Family))
|
|
usermem.ByteOrder.PutUint16(ifr.Data[2:4], 0)
|
|
copy(ifr.Data[4:8], ifaceAddr.Addr[:4])
|
|
|
|
// Copy the ifr to userspace.
|
|
dst := uintptr(ifc.Ptr) + uintptr(ifc.Len)
|
|
ifc.Len += int32(linux.SizeOfIFReq)
|
|
if _, err := usermem.CopyObjectOut(ctx, io, usermem.Addr(dst), ifr, usermem.IOOpts{
|
|
AddressSpaceActive: true,
|
|
}); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// interfaceStatusFlags returns status flags for an interface in the stack.
|
|
// Flag values and meanings are described in greater detail in netdevice(7) in
|
|
// the SIOCGIFFLAGS section.
|
|
func interfaceStatusFlags(stack inet.Stack, name string) (uint32, *syserr.Error) {
|
|
// We should only ever be passed a netstack.Stack.
|
|
epstack, ok := stack.(*Stack)
|
|
if !ok {
|
|
return 0, errStackType
|
|
}
|
|
|
|
// Find the NIC corresponding to this interface.
|
|
for _, info := range epstack.Stack.NICInfo() {
|
|
if info.Name == name {
|
|
return nicStateFlagsToLinux(info.Flags), nil
|
|
}
|
|
}
|
|
return 0, syserr.ErrNoDevice
|
|
}
|
|
|
|
func nicStateFlagsToLinux(f stack.NICStateFlags) uint32 {
|
|
var rv uint32
|
|
if f.Up {
|
|
rv |= linux.IFF_UP | linux.IFF_LOWER_UP
|
|
}
|
|
if f.Running {
|
|
rv |= linux.IFF_RUNNING
|
|
}
|
|
if f.Promiscuous {
|
|
rv |= linux.IFF_PROMISC
|
|
}
|
|
if f.Loopback {
|
|
rv |= linux.IFF_LOOPBACK
|
|
}
|
|
return rv
|
|
}
|
|
|
|
// State implements socket.Socket.State. State translates the internal state
|
|
// returned by netstack to values defined by Linux.
|
|
func (s *SocketOperations) State() uint32 {
|
|
if s.family != linux.AF_INET && s.family != linux.AF_INET6 {
|
|
// States not implemented for this socket's family.
|
|
return 0
|
|
}
|
|
|
|
switch {
|
|
case s.skType == linux.SOCK_STREAM && s.protocol == 0 || s.protocol == syscall.IPPROTO_TCP:
|
|
// TCP socket.
|
|
switch tcp.EndpointState(s.Endpoint.State()) {
|
|
case tcp.StateEstablished:
|
|
return linux.TCP_ESTABLISHED
|
|
case tcp.StateSynSent:
|
|
return linux.TCP_SYN_SENT
|
|
case tcp.StateSynRecv:
|
|
return linux.TCP_SYN_RECV
|
|
case tcp.StateFinWait1:
|
|
return linux.TCP_FIN_WAIT1
|
|
case tcp.StateFinWait2:
|
|
return linux.TCP_FIN_WAIT2
|
|
case tcp.StateTimeWait:
|
|
return linux.TCP_TIME_WAIT
|
|
case tcp.StateClose, tcp.StateInitial, tcp.StateBound, tcp.StateConnecting, tcp.StateError:
|
|
return linux.TCP_CLOSE
|
|
case tcp.StateCloseWait:
|
|
return linux.TCP_CLOSE_WAIT
|
|
case tcp.StateLastAck:
|
|
return linux.TCP_LAST_ACK
|
|
case tcp.StateListen:
|
|
return linux.TCP_LISTEN
|
|
case tcp.StateClosing:
|
|
return linux.TCP_CLOSING
|
|
default:
|
|
// Internal or unknown state.
|
|
return 0
|
|
}
|
|
case s.skType == linux.SOCK_DGRAM && s.protocol == 0 || s.protocol == syscall.IPPROTO_UDP:
|
|
// UDP socket.
|
|
switch udp.EndpointState(s.Endpoint.State()) {
|
|
case udp.StateInitial, udp.StateBound, udp.StateClosed:
|
|
return linux.TCP_CLOSE
|
|
case udp.StateConnected:
|
|
return linux.TCP_ESTABLISHED
|
|
default:
|
|
return 0
|
|
}
|
|
case s.skType == linux.SOCK_DGRAM && s.protocol == syscall.IPPROTO_ICMP || s.protocol == syscall.IPPROTO_ICMPV6:
|
|
// TODO(b/112063468): Export states for ICMP sockets.
|
|
case s.skType == linux.SOCK_RAW:
|
|
// TODO(b/112063468): Export states for raw sockets.
|
|
default:
|
|
// Unknown transport protocol, how did we make this socket?
|
|
log.Warningf("Unknown transport protocol for an existing socket: family=%v, type=%v, protocol=%v, internal type %v", s.family, s.skType, s.protocol, reflect.TypeOf(s.Endpoint).Elem())
|
|
return 0
|
|
}
|
|
|
|
return 0
|
|
}
|
|
|
|
// Type implements socket.Socket.Type.
|
|
func (s *SocketOperations) Type() (family int, skType linux.SockType, protocol int) {
|
|
return s.family, s.skType, s.protocol
|
|
}
|