2019-06-10 09:33:19 +01:00
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package home
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2019-03-19 15:47:22 +00:00
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import (
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2019-09-26 14:40:52 +01:00
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"bytes"
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2019-04-26 13:10:29 +01:00
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"fmt"
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"net"
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2019-06-25 15:51:53 +01:00
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"os/exec"
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2019-03-19 15:47:22 +00:00
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"runtime"
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2020-01-28 11:06:52 +00:00
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"sort"
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2019-03-19 15:47:22 +00:00
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"strings"
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2019-04-26 13:10:29 +01:00
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"sync"
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2019-06-25 15:51:53 +01:00
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"time"
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2019-03-19 15:47:22 +00:00
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2021-01-27 15:32:13 +00:00
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"github.com/AdguardTeam/AdGuardHome/internal/agherr"
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2021-04-07 14:36:38 +01:00
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"github.com/AdguardTeam/AdGuardHome/internal/aghnet"
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2021-04-07 18:16:06 +01:00
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"github.com/AdguardTeam/AdGuardHome/internal/aghstrings"
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2020-10-30 10:32:02 +00:00
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"github.com/AdguardTeam/AdGuardHome/internal/dhcpd"
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"github.com/AdguardTeam/AdGuardHome/internal/dnsforward"
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2021-05-21 14:15:47 +01:00
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"github.com/AdguardTeam/AdGuardHome/internal/filtering"
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2021-04-02 15:30:39 +01:00
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"github.com/AdguardTeam/AdGuardHome/internal/querylog"
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2021-01-27 15:32:13 +00:00
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"github.com/AdguardTeam/dnsproxy/proxy"
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2021-03-03 12:27:25 +00:00
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"github.com/AdguardTeam/dnsproxy/upstream"
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2019-03-19 15:47:22 +00:00
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"github.com/AdguardTeam/golibs/log"
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2019-06-25 15:51:53 +01:00
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)
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2021-01-27 15:32:13 +00:00
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const clientsUpdatePeriod = 10 * time.Minute
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2019-03-19 15:47:22 +00:00
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2020-02-18 16:27:09 +00:00
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var webHandlersRegistered = false
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2021-01-27 15:32:13 +00:00
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// Client contains information about persistent clients.
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2019-03-19 15:47:22 +00:00
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type Client struct {
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2021-05-06 14:41:33 +01:00
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// upstreamConfig is the custom upstream config for this client. If
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// it's nil, it has not been initialized yet. If it's non-nil and
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// empty, there are no valid upstreams. If it's non-nil and non-empty,
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// these upstream must be used.
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upstreamConfig *proxy.UpstreamConfig
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2019-07-18 10:27:10 +01:00
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2021-05-06 14:41:33 +01:00
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Name string
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2019-11-06 14:24:15 +00:00
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2021-05-06 14:41:33 +01:00
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IDs []string
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Tags []string
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BlockedServices []string
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Upstreams []string
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2020-05-13 18:31:43 +01:00
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2021-05-06 14:41:33 +01:00
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UseOwnSettings bool
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FilteringEnabled bool
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SafeSearchEnabled bool
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SafeBrowsingEnabled bool
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ParentalEnabled bool
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UseOwnBlockedServices bool
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2019-03-19 15:47:22 +00:00
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}
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2019-04-26 13:10:29 +01:00
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type clientSource uint
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2021-01-27 15:32:13 +00:00
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// Client sources. The order determines the priority.
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2019-04-26 13:10:29 +01:00
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const (
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2021-01-27 15:32:13 +00:00
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ClientSourceWHOIS clientSource = iota
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ClientSourceRDNS
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ClientSourceDHCP
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ClientSourceARP
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ClientSourceHostsFile
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2019-04-26 13:10:29 +01:00
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)
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2021-04-02 15:30:39 +01:00
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// RuntimeClient information
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type RuntimeClient struct {
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2021-05-06 14:41:33 +01:00
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WhoisInfo *RuntimeClientWhoisInfo
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2019-09-18 16:44:27 +01:00
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Host string
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Source clientSource
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2021-04-02 15:30:39 +01:00
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}
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// RuntimeClientWhoisInfo is the filtered WHOIS data for a runtime client.
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type RuntimeClientWhoisInfo struct {
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City string `json:"city,omitempty"`
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Country string `json:"country,omitempty"`
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Orgname string `json:"orgname,omitempty"`
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2019-04-26 13:10:29 +01:00
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}
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type clientsContainer struct {
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2021-01-27 15:32:13 +00:00
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// TODO(a.garipov): Perhaps use a number of separate indices for
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// different types (string, net.IP, and so on).
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2021-04-02 15:30:39 +01:00
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list map[string]*Client // name -> client
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idIndex map[string]*Client // ID -> client
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ipToRC map[string]*RuntimeClient // IP -> runtime client
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2021-01-27 15:32:13 +00:00
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lock sync.Mutex
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2019-12-23 16:31:27 +00:00
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2021-04-20 14:26:19 +01:00
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allTags *aghstrings.Set
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2020-01-28 11:06:52 +00:00
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2019-12-23 16:31:27 +00:00
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// dhcpServer is used for looking up clients IP addresses by MAC addresses
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2019-11-22 11:21:08 +00:00
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dhcpServer *dhcpd.Server
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2019-11-29 14:35:26 +00:00
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2020-09-08 11:56:45 +01:00
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// dnsServer is used for checking clients IP status access list status
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dnsServer *dnsforward.Server
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2020-07-24 12:30:29 +01:00
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2021-04-12 16:31:45 +01:00
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etcHosts *aghnet.EtcHostsContainer // get entries from system hosts-files
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2020-03-20 12:05:43 +00:00
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2019-11-29 14:35:26 +00:00
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testing bool // if TRUE, this object is used for internal tests
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2019-04-26 13:10:29 +01:00
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}
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2019-07-09 16:19:50 +01:00
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// Init initializes clients container
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2020-07-03 16:20:01 +01:00
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// dhcpServer: optional
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2019-07-09 16:19:50 +01:00
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// Note: this function must be called only once
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2021-04-12 16:31:45 +01:00
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func (clients *clientsContainer) Init(
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objects []clientObject,
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dhcpServer *dhcpd.Server,
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etcHosts *aghnet.EtcHostsContainer,
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) {
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2019-04-26 13:10:29 +01:00
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if clients.list != nil {
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log.Fatal("clients.list != nil")
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}
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clients.list = make(map[string]*Client)
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2019-09-26 14:40:52 +01:00
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clients.idIndex = make(map[string]*Client)
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2021-04-02 15:30:39 +01:00
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clients.ipToRC = make(map[string]*RuntimeClient)
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2020-01-28 11:06:52 +00:00
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2021-04-20 14:26:19 +01:00
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clients.allTags = aghstrings.NewSet(clientTags...)
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2020-01-28 11:06:52 +00:00
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2019-11-22 11:21:08 +00:00
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clients.dhcpServer = dhcpServer
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2021-04-14 17:18:48 +01:00
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clients.etcHosts = etcHosts
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2019-09-26 14:40:52 +01:00
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clients.addFromConfig(objects)
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2019-04-26 13:10:29 +01:00
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2019-11-29 14:35:26 +00:00
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if !clients.testing {
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2021-04-15 15:52:53 +01:00
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clients.updateFromDHCP(true)
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2020-07-03 16:20:01 +01:00
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if clients.dhcpServer != nil {
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clients.dhcpServer.SetOnLeaseChanged(clients.onDHCPLeaseChanged)
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}
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2021-04-12 16:31:45 +01:00
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if clients.etcHosts != nil {
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clients.etcHosts.SetOnChanged(clients.onHostsChanged)
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}
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2020-02-18 16:27:09 +00:00
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}
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}
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2020-01-30 07:25:02 +00:00
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2020-02-18 16:27:09 +00:00
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// Start - start the module
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func (clients *clientsContainer) Start() {
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if !clients.testing {
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if !webHandlersRegistered {
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webHandlersRegistered = true
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clients.registerWebHandlers()
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}
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go clients.periodicUpdate()
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2019-11-29 14:35:26 +00:00
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}
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2019-06-25 15:51:53 +01:00
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}
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2021-04-02 15:30:39 +01:00
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// Reload reloads runtime clients.
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2020-02-18 11:49:50 +00:00
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func (clients *clientsContainer) Reload() {
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clients.addFromSystemARP()
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}
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2019-09-26 14:40:52 +01:00
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type clientObject struct {
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Name string `yaml:"name"`
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2020-01-28 11:06:52 +00:00
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Tags []string `yaml:"tags"`
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2019-09-26 14:40:52 +01:00
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IDs []string `yaml:"ids"`
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UseGlobalSettings bool `yaml:"use_global_settings"`
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FilteringEnabled bool `yaml:"filtering_enabled"`
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ParentalEnabled bool `yaml:"parental_enabled"`
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2020-01-09 12:01:54 +00:00
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SafeSearchEnabled bool `yaml:"safesearch_enabled"`
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SafeBrowsingEnabled bool `yaml:"safebrowsing_enabled"`
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2019-09-26 14:40:52 +01:00
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UseGlobalBlockedServices bool `yaml:"use_global_blocked_services"`
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BlockedServices []string `yaml:"blocked_services"`
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2019-11-06 14:24:15 +00:00
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Upstreams []string `yaml:"upstreams"`
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2019-09-26 14:40:52 +01:00
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}
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2021-04-20 14:26:19 +01:00
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func (clients *clientsContainer) tagKnown(tag string) (ok bool) {
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return clients.allTags.Has(tag)
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2020-01-28 11:06:52 +00:00
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}
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2019-09-26 14:40:52 +01:00
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func (clients *clientsContainer) addFromConfig(objects []clientObject) {
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for _, cy := range objects {
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2021-01-27 15:32:13 +00:00
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cli := &Client{
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2019-09-26 14:40:52 +01:00
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Name: cy.Name,
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IDs: cy.IDs,
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UseOwnSettings: !cy.UseGlobalSettings,
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FilteringEnabled: cy.FilteringEnabled,
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ParentalEnabled: cy.ParentalEnabled,
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SafeSearchEnabled: cy.SafeSearchEnabled,
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SafeBrowsingEnabled: cy.SafeBrowsingEnabled,
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UseOwnBlockedServices: !cy.UseGlobalBlockedServices,
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2019-11-06 14:24:15 +00:00
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Upstreams: cy.Upstreams,
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2019-09-26 14:40:52 +01:00
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}
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2020-01-28 11:06:52 +00:00
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2020-03-02 15:51:48 +00:00
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for _, s := range cy.BlockedServices {
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2021-05-21 14:15:47 +01:00
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if !filtering.BlockedSvcKnown(s) {
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2021-01-27 15:32:13 +00:00
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log.Debug("clients: skipping unknown blocked-service %q", s)
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2020-03-02 15:51:48 +00:00
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continue
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}
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cli.BlockedServices = append(cli.BlockedServices, s)
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}
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2020-01-28 11:06:52 +00:00
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for _, t := range cy.Tags {
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if !clients.tagKnown(t) {
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2021-01-27 15:32:13 +00:00
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log.Debug("clients: skipping unknown tag %q", t)
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2020-01-28 11:06:52 +00:00
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continue
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}
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cli.Tags = append(cli.Tags, t)
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}
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sort.Strings(cli.Tags)
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2019-09-26 14:40:52 +01:00
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_, err := clients.Add(cli)
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if err != nil {
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log.Tracef("clientAdd: %s", err)
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}
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}
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}
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// WriteDiskConfig - write configuration
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func (clients *clientsContainer) WriteDiskConfig(objects *[]clientObject) {
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2019-12-11 09:38:58 +00:00
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clients.lock.Lock()
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for _, cli := range clients.list {
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2019-09-26 14:40:52 +01:00
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cy := clientObject{
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2019-12-11 09:38:58 +00:00
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Name: cli.Name,
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UseGlobalSettings: !cli.UseOwnSettings,
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FilteringEnabled: cli.FilteringEnabled,
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ParentalEnabled: cli.ParentalEnabled,
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SafeSearchEnabled: cli.SafeSearchEnabled,
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SafeBrowsingEnabled: cli.SafeBrowsingEnabled,
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2019-09-26 14:40:52 +01:00
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UseGlobalBlockedServices: !cli.UseOwnBlockedServices,
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}
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2019-12-11 09:38:58 +00:00
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2021-04-07 18:16:06 +01:00
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cy.Tags = aghstrings.CloneSlice(cli.Tags)
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cy.IDs = aghstrings.CloneSlice(cli.IDs)
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cy.BlockedServices = aghstrings.CloneSlice(cli.BlockedServices)
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cy.Upstreams = aghstrings.CloneSlice(cli.Upstreams)
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2019-12-11 09:38:58 +00:00
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2019-09-26 14:40:52 +01:00
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*objects = append(*objects, cy)
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}
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2019-12-11 09:38:58 +00:00
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clients.lock.Unlock()
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2019-09-26 14:40:52 +01:00
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}
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2019-07-09 16:19:50 +01:00
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func (clients *clientsContainer) periodicUpdate() {
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2019-06-25 15:51:53 +01:00
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for {
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2020-02-18 11:49:50 +00:00
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clients.Reload()
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2019-06-25 15:51:53 +01:00
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time.Sleep(clientsUpdatePeriod)
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}
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2019-04-26 13:10:29 +01:00
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}
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2020-01-30 07:25:02 +00:00
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func (clients *clientsContainer) onDHCPLeaseChanged(flags int) {
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switch flags {
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case dhcpd.LeaseChangedAdded,
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dhcpd.LeaseChangedAddedStatic,
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dhcpd.LeaseChangedRemovedStatic:
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2021-04-15 15:52:53 +01:00
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clients.updateFromDHCP(true)
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case dhcpd.LeaseChangedRemovedAll:
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clients.updateFromDHCP(false)
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2020-01-30 07:25:02 +00:00
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}
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}
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2020-03-20 12:05:43 +00:00
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func (clients *clientsContainer) onHostsChanged() {
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clients.addFromHostsFile()
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}
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2021-01-27 15:32:13 +00:00
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// Exists checks if client with this ID already exists.
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func (clients *clientsContainer) Exists(id string, source clientSource) (ok bool) {
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2019-04-26 13:10:29 +01:00
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clients.lock.Lock()
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defer clients.lock.Unlock()
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2021-01-27 15:32:13 +00:00
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_, ok = clients.findLocked(id)
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2019-04-26 13:10:29 +01:00
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if ok {
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return true
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}
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2021-04-02 15:30:39 +01:00
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var rc *RuntimeClient
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rc, ok = clients.ipToRC[id]
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2019-09-18 16:44:27 +01:00
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if !ok {
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return false
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}
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2021-01-27 15:32:13 +00:00
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// Return false if the new source has higher priority.
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2021-04-02 15:30:39 +01:00
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return source <= rc.Source
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2019-04-26 13:10:29 +01:00
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}
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2021-04-02 15:30:39 +01:00
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func toQueryLogWhois(wi *RuntimeClientWhoisInfo) (cw *querylog.ClientWhois) {
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if wi == nil {
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return &querylog.ClientWhois{}
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}
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return &querylog.ClientWhois{
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City: wi.City,
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Country: wi.Country,
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Orgname: wi.Orgname,
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}
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}
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// findMultiple is a wrapper around Find to make it a valid client finder for
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// the query log. err is always nil.
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func (clients *clientsContainer) findMultiple(ids []string) (c *querylog.Client, err error) {
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|
|
for _, id := range ids {
|
|
|
|
var name string
|
|
|
|
whois := &querylog.ClientWhois{}
|
|
|
|
|
|
|
|
c, ok := clients.Find(id)
|
|
|
|
if ok {
|
|
|
|
name = c.Name
|
|
|
|
} else {
|
|
|
|
var rc RuntimeClient
|
|
|
|
rc, ok = clients.FindRuntimeClient(id)
|
|
|
|
if !ok {
|
|
|
|
continue
|
|
|
|
}
|
|
|
|
|
2021-04-07 15:49:37 +01:00
|
|
|
name = rc.Host
|
2021-04-02 15:30:39 +01:00
|
|
|
whois = toQueryLogWhois(rc.WhoisInfo)
|
|
|
|
}
|
|
|
|
|
|
|
|
ip := net.ParseIP(id)
|
|
|
|
disallowed, disallowedRule := clients.dnsServer.IsBlockedIP(ip)
|
|
|
|
|
|
|
|
return &querylog.Client{
|
|
|
|
Name: name,
|
|
|
|
DisallowedRule: disallowedRule,
|
|
|
|
Whois: whois,
|
|
|
|
Disallowed: disallowed,
|
|
|
|
}, nil
|
|
|
|
}
|
|
|
|
|
|
|
|
return nil, nil
|
|
|
|
}
|
|
|
|
|
2021-01-27 15:32:13 +00:00
|
|
|
func (clients *clientsContainer) Find(id string) (c *Client, ok bool) {
|
2019-12-23 13:27:24 +00:00
|
|
|
clients.lock.Lock()
|
|
|
|
defer clients.lock.Unlock()
|
|
|
|
|
2021-01-27 15:32:13 +00:00
|
|
|
c, ok = clients.findLocked(id)
|
2020-01-28 11:06:52 +00:00
|
|
|
if !ok {
|
2021-01-27 15:32:13 +00:00
|
|
|
return nil, false
|
2020-01-28 11:06:52 +00:00
|
|
|
}
|
2021-01-27 15:32:13 +00:00
|
|
|
|
2021-04-07 18:16:06 +01:00
|
|
|
c.IDs = aghstrings.CloneSlice(c.IDs)
|
|
|
|
c.Tags = aghstrings.CloneSlice(c.Tags)
|
|
|
|
c.BlockedServices = aghstrings.CloneSlice(c.BlockedServices)
|
|
|
|
c.Upstreams = aghstrings.CloneSlice(c.Upstreams)
|
2020-01-28 11:06:52 +00:00
|
|
|
return c, true
|
2019-12-23 13:27:24 +00:00
|
|
|
}
|
|
|
|
|
2019-12-23 16:31:27 +00:00
|
|
|
// FindUpstreams looks for upstreams configured for the client
|
|
|
|
// If no client found for this IP, or if no custom upstreams are configured,
|
|
|
|
// this method returns nil
|
2020-05-13 18:31:43 +01:00
|
|
|
func (clients *clientsContainer) FindUpstreams(ip string) *proxy.UpstreamConfig {
|
2019-12-23 16:31:27 +00:00
|
|
|
clients.lock.Lock()
|
|
|
|
defer clients.lock.Unlock()
|
|
|
|
|
2021-01-27 15:32:13 +00:00
|
|
|
c, ok := clients.findLocked(ip)
|
2019-12-23 16:31:27 +00:00
|
|
|
if !ok {
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
|
2021-04-13 11:44:29 +01:00
|
|
|
upstreams := aghstrings.FilterOut(c.Upstreams, aghstrings.IsCommentOrEmpty)
|
|
|
|
if len(upstreams) == 0 {
|
2020-05-13 18:31:43 +01:00
|
|
|
return nil
|
2019-12-23 16:31:27 +00:00
|
|
|
}
|
|
|
|
|
2020-05-13 18:31:43 +01:00
|
|
|
if c.upstreamConfig == nil {
|
2021-03-11 09:17:54 +00:00
|
|
|
conf, err := proxy.ParseUpstreamsConfig(
|
2021-04-13 11:44:29 +01:00
|
|
|
upstreams,
|
2021-03-03 12:27:25 +00:00
|
|
|
upstream.Options{
|
|
|
|
Bootstrap: config.DNS.BootstrapDNS,
|
|
|
|
Timeout: dnsforward.DefaultTimeout,
|
|
|
|
},
|
|
|
|
)
|
2020-05-13 18:31:43 +01:00
|
|
|
if err == nil {
|
2021-03-11 09:17:54 +00:00
|
|
|
c.upstreamConfig = &conf
|
2020-05-13 18:31:43 +01:00
|
|
|
}
|
2019-12-23 16:31:27 +00:00
|
|
|
}
|
2020-05-13 18:31:43 +01:00
|
|
|
|
|
|
|
return c.upstreamConfig
|
2019-12-23 16:31:27 +00:00
|
|
|
}
|
|
|
|
|
2021-01-27 15:32:13 +00:00
|
|
|
// findLocked searches for a client by its ID. For internal use only.
|
|
|
|
func (clients *clientsContainer) findLocked(id string) (c *Client, ok bool) {
|
|
|
|
c, ok = clients.idIndex[id]
|
|
|
|
if ok {
|
|
|
|
return c, true
|
2019-09-26 14:40:52 +01:00
|
|
|
}
|
|
|
|
|
2021-01-27 15:32:13 +00:00
|
|
|
ip := net.ParseIP(id)
|
|
|
|
if ip == nil {
|
|
|
|
return nil, false
|
2019-04-26 13:10:29 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
for _, c = range clients.list {
|
2019-09-26 14:40:52 +01:00
|
|
|
for _, id := range c.IDs {
|
|
|
|
_, ipnet, err := net.ParseCIDR(id)
|
2019-04-26 13:10:29 +01:00
|
|
|
if err != nil {
|
|
|
|
continue
|
|
|
|
}
|
2021-01-27 15:32:13 +00:00
|
|
|
|
2021-01-20 14:27:53 +00:00
|
|
|
if ipnet.Contains(ip) {
|
2021-01-27 15:32:13 +00:00
|
|
|
return c, true
|
2019-09-26 14:40:52 +01:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2019-11-22 11:21:08 +00:00
|
|
|
if clients.dhcpServer == nil {
|
2021-01-27 15:32:13 +00:00
|
|
|
return nil, false
|
2019-11-22 11:21:08 +00:00
|
|
|
}
|
2021-01-27 15:32:13 +00:00
|
|
|
|
2021-01-20 14:27:53 +00:00
|
|
|
macFound := clients.dhcpServer.FindMACbyIP(ip)
|
2019-09-26 14:40:52 +01:00
|
|
|
if macFound == nil {
|
2021-01-27 15:32:13 +00:00
|
|
|
return nil, false
|
2019-09-26 14:40:52 +01:00
|
|
|
}
|
2021-01-27 15:32:13 +00:00
|
|
|
|
2019-09-26 14:40:52 +01:00
|
|
|
for _, c = range clients.list {
|
|
|
|
for _, id := range c.IDs {
|
|
|
|
hwAddr, err := net.ParseMAC(id)
|
|
|
|
if err != nil {
|
2019-04-26 13:10:29 +01:00
|
|
|
continue
|
|
|
|
}
|
2021-01-27 15:32:13 +00:00
|
|
|
|
2019-09-26 14:40:52 +01:00
|
|
|
if bytes.Equal(hwAddr, macFound) {
|
2021-01-27 15:32:13 +00:00
|
|
|
return c, true
|
2019-04-26 13:10:29 +01:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2021-01-27 15:32:13 +00:00
|
|
|
return nil, false
|
2019-04-26 13:10:29 +01:00
|
|
|
}
|
|
|
|
|
2021-04-02 15:30:39 +01:00
|
|
|
// FindRuntimeClient finds a runtime client by their IP.
|
|
|
|
func (clients *clientsContainer) FindRuntimeClient(ip string) (RuntimeClient, bool) {
|
2021-01-27 15:32:13 +00:00
|
|
|
ipAddr := net.ParseIP(ip)
|
|
|
|
if ipAddr == nil {
|
2021-04-02 15:30:39 +01:00
|
|
|
return RuntimeClient{}, false
|
2019-09-26 14:40:52 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
clients.lock.Lock()
|
|
|
|
defer clients.lock.Unlock()
|
|
|
|
|
2021-04-02 15:30:39 +01:00
|
|
|
rc, ok := clients.ipToRC[ip]
|
2019-09-26 14:40:52 +01:00
|
|
|
if ok {
|
2021-04-02 15:30:39 +01:00
|
|
|
return *rc, true
|
2019-09-26 14:40:52 +01:00
|
|
|
}
|
2021-04-02 15:30:39 +01:00
|
|
|
|
|
|
|
return RuntimeClient{}, false
|
2019-09-26 14:40:52 +01:00
|
|
|
}
|
|
|
|
|
2021-01-27 15:32:13 +00:00
|
|
|
// check validates the client.
|
|
|
|
func (clients *clientsContainer) check(c *Client) (err error) {
|
|
|
|
switch {
|
|
|
|
case c == nil:
|
|
|
|
return agherr.Error("client is nil")
|
|
|
|
case c.Name == "":
|
|
|
|
return agherr.Error("invalid name")
|
|
|
|
case len(c.IDs) == 0:
|
|
|
|
return agherr.Error("id required")
|
|
|
|
default:
|
|
|
|
// Go on.
|
2019-04-26 13:10:29 +01:00
|
|
|
}
|
|
|
|
|
2019-09-26 14:40:52 +01:00
|
|
|
for i, id := range c.IDs {
|
2021-01-27 15:32:13 +00:00
|
|
|
// Normalize structured data.
|
|
|
|
var ip net.IP
|
|
|
|
var ipnet *net.IPNet
|
|
|
|
var mac net.HardwareAddr
|
|
|
|
if ip = net.ParseIP(id); ip != nil {
|
|
|
|
c.IDs[i] = ip.String()
|
|
|
|
} else if ip, ipnet, err = net.ParseCIDR(id); err == nil {
|
|
|
|
ipnet.IP = ip
|
|
|
|
c.IDs[i] = ipnet.String()
|
|
|
|
} else if mac, err = net.ParseMAC(id); err == nil {
|
|
|
|
c.IDs[i] = mac.String()
|
|
|
|
} else if err = dnsforward.ValidateClientID(id); err == nil {
|
|
|
|
c.IDs[i] = id
|
|
|
|
} else {
|
|
|
|
return fmt.Errorf("invalid client id at index %d: %q", i, id)
|
2019-04-26 13:10:29 +01:00
|
|
|
}
|
|
|
|
}
|
2019-11-06 14:24:15 +00:00
|
|
|
|
2020-01-28 11:06:52 +00:00
|
|
|
for _, t := range c.Tags {
|
|
|
|
if !clients.tagKnown(t) {
|
2021-01-27 15:32:13 +00:00
|
|
|
return fmt.Errorf("invalid tag: %q", t)
|
2020-01-28 11:06:52 +00:00
|
|
|
}
|
|
|
|
}
|
2021-01-27 15:32:13 +00:00
|
|
|
|
2020-01-28 11:06:52 +00:00
|
|
|
sort.Strings(c.Tags)
|
|
|
|
|
2021-01-27 15:32:13 +00:00
|
|
|
err = dnsforward.ValidateUpstreams(c.Upstreams)
|
2020-09-22 13:04:17 +01:00
|
|
|
if err != nil {
|
2020-11-05 12:20:57 +00:00
|
|
|
return fmt.Errorf("invalid upstream servers: %w", err)
|
2019-11-06 14:24:15 +00:00
|
|
|
}
|
|
|
|
|
2019-04-26 13:10:29 +01:00
|
|
|
return nil
|
|
|
|
}
|
|
|
|
|
2021-01-27 15:32:13 +00:00
|
|
|
// Add adds a new client object. ok is false if such client already exists or
|
|
|
|
// if an error occurred.
|
|
|
|
func (clients *clientsContainer) Add(c *Client) (ok bool, err error) {
|
|
|
|
err = clients.check(c)
|
|
|
|
if err != nil {
|
|
|
|
return false, err
|
2019-04-26 13:10:29 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
clients.lock.Lock()
|
|
|
|
defer clients.lock.Unlock()
|
|
|
|
|
|
|
|
// check Name index
|
2021-01-27 15:32:13 +00:00
|
|
|
_, ok = clients.list[c.Name]
|
2019-04-26 13:10:29 +01:00
|
|
|
if ok {
|
|
|
|
return false, nil
|
|
|
|
}
|
|
|
|
|
2019-09-26 14:40:52 +01:00
|
|
|
// check ID index
|
|
|
|
for _, id := range c.IDs {
|
2021-01-27 15:32:13 +00:00
|
|
|
var c2 *Client
|
|
|
|
c2, ok = clients.idIndex[id]
|
2019-04-26 13:10:29 +01:00
|
|
|
if ok {
|
2021-01-27 15:32:13 +00:00
|
|
|
return false, fmt.Errorf("another client uses the same ID (%q): %q", id, c2.Name)
|
2019-04-26 13:10:29 +01:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2019-09-26 14:40:52 +01:00
|
|
|
// update Name index
|
2021-01-27 15:32:13 +00:00
|
|
|
clients.list[c.Name] = c
|
2019-09-26 14:40:52 +01:00
|
|
|
|
|
|
|
// update ID index
|
|
|
|
for _, id := range c.IDs {
|
2021-01-27 15:32:13 +00:00
|
|
|
clients.idIndex[id] = c
|
2019-04-26 13:10:29 +01:00
|
|
|
}
|
|
|
|
|
2021-01-27 15:32:13 +00:00
|
|
|
log.Debug("clients: added %q: ID:%q [%d]", c.Name, c.IDs, len(clients.list))
|
|
|
|
|
2019-04-26 13:10:29 +01:00
|
|
|
return true, nil
|
|
|
|
}
|
|
|
|
|
2021-01-27 15:32:13 +00:00
|
|
|
// Del removes a client. ok is false if there is no such client.
|
|
|
|
func (clients *clientsContainer) Del(name string) (ok bool) {
|
2019-04-26 13:10:29 +01:00
|
|
|
clients.lock.Lock()
|
|
|
|
defer clients.lock.Unlock()
|
|
|
|
|
2021-01-27 15:32:13 +00:00
|
|
|
var c *Client
|
|
|
|
c, ok = clients.list[name]
|
2019-04-26 13:10:29 +01:00
|
|
|
if !ok {
|
|
|
|
return false
|
|
|
|
}
|
|
|
|
|
2019-09-26 14:40:52 +01:00
|
|
|
// update Name index
|
2019-04-26 13:10:29 +01:00
|
|
|
delete(clients.list, name)
|
2019-09-26 14:40:52 +01:00
|
|
|
|
|
|
|
// update ID index
|
|
|
|
for _, id := range c.IDs {
|
|
|
|
delete(clients.idIndex, id)
|
|
|
|
}
|
2021-01-27 15:32:13 +00:00
|
|
|
|
2019-09-26 14:40:52 +01:00
|
|
|
return true
|
|
|
|
}
|
|
|
|
|
2021-01-27 15:32:13 +00:00
|
|
|
// equalStringSlices returns true if the slices are equal.
|
|
|
|
func equalStringSlices(a, b []string) (ok bool) {
|
2019-09-26 14:40:52 +01:00
|
|
|
if len(a) != len(b) {
|
|
|
|
return false
|
|
|
|
}
|
2021-01-27 15:32:13 +00:00
|
|
|
|
|
|
|
for i := range a {
|
2019-09-26 14:40:52 +01:00
|
|
|
if a[i] != b[i] {
|
|
|
|
return false
|
|
|
|
}
|
|
|
|
}
|
2021-01-27 15:32:13 +00:00
|
|
|
|
2019-04-26 13:10:29 +01:00
|
|
|
return true
|
|
|
|
}
|
|
|
|
|
2021-01-27 15:32:13 +00:00
|
|
|
// Update updates a client by its name.
|
|
|
|
func (clients *clientsContainer) Update(name string, c *Client) (err error) {
|
|
|
|
err = clients.check(c)
|
2019-04-26 13:10:29 +01:00
|
|
|
if err != nil {
|
|
|
|
return err
|
|
|
|
}
|
|
|
|
|
|
|
|
clients.lock.Lock()
|
|
|
|
defer clients.lock.Unlock()
|
|
|
|
|
2021-01-27 15:32:13 +00:00
|
|
|
prev, ok := clients.list[name]
|
2019-04-26 13:10:29 +01:00
|
|
|
if !ok {
|
2021-01-27 15:32:13 +00:00
|
|
|
return agherr.Error("client not found")
|
2019-04-26 13:10:29 +01:00
|
|
|
}
|
|
|
|
|
2021-03-12 11:32:08 +00:00
|
|
|
// First, check the name index.
|
2021-01-27 15:32:13 +00:00
|
|
|
if prev.Name != c.Name {
|
2019-04-26 13:10:29 +01:00
|
|
|
_, ok = clients.list[c.Name]
|
|
|
|
if ok {
|
2021-01-27 15:32:13 +00:00
|
|
|
return agherr.Error("client already exists")
|
2019-04-26 13:10:29 +01:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2021-03-12 11:32:08 +00:00
|
|
|
// Second, check the IP index.
|
2021-01-27 15:32:13 +00:00
|
|
|
if !equalStringSlices(prev.IDs, c.IDs) {
|
2019-09-26 14:40:52 +01:00
|
|
|
for _, id := range c.IDs {
|
2021-03-12 11:32:08 +00:00
|
|
|
c2, ok2 := clients.idIndex[id]
|
|
|
|
if ok2 && c2 != prev {
|
|
|
|
return fmt.Errorf("another client uses the same id (%q): %q", id, c2.Name)
|
2019-09-26 14:40:52 +01:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
// update ID index
|
2021-01-27 15:32:13 +00:00
|
|
|
for _, id := range prev.IDs {
|
2019-09-26 14:40:52 +01:00
|
|
|
delete(clients.idIndex, id)
|
|
|
|
}
|
|
|
|
for _, id := range c.IDs {
|
2021-01-27 15:32:13 +00:00
|
|
|
clients.idIndex[id] = prev
|
2019-04-26 13:10:29 +01:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
// update Name index
|
2021-01-27 15:32:13 +00:00
|
|
|
if prev.Name != c.Name {
|
|
|
|
delete(clients.list, prev.Name)
|
|
|
|
clients.list[c.Name] = prev
|
2019-04-26 13:10:29 +01:00
|
|
|
}
|
|
|
|
|
2019-12-23 16:31:27 +00:00
|
|
|
// update upstreams cache
|
2020-05-13 18:31:43 +01:00
|
|
|
c.upstreamConfig = nil
|
2019-12-23 16:31:27 +00:00
|
|
|
|
2021-01-27 15:32:13 +00:00
|
|
|
*prev = *c
|
|
|
|
|
2019-04-26 13:10:29 +01:00
|
|
|
return nil
|
|
|
|
}
|
|
|
|
|
2021-01-27 15:32:13 +00:00
|
|
|
// SetWhoisInfo sets the WHOIS information for a client.
|
2021-04-02 15:30:39 +01:00
|
|
|
func (clients *clientsContainer) SetWhoisInfo(ip string, wi *RuntimeClientWhoisInfo) {
|
2019-09-18 16:44:27 +01:00
|
|
|
clients.lock.Lock()
|
|
|
|
defer clients.lock.Unlock()
|
|
|
|
|
2021-01-27 15:32:13 +00:00
|
|
|
_, ok := clients.findLocked(ip)
|
2019-09-18 16:44:27 +01:00
|
|
|
if ok {
|
2021-01-27 15:32:13 +00:00
|
|
|
log.Debug("clients: client for %s is already created, ignore whois info", ip)
|
2019-09-23 18:41:14 +01:00
|
|
|
return
|
2019-09-18 16:44:27 +01:00
|
|
|
}
|
|
|
|
|
2021-04-02 15:30:39 +01:00
|
|
|
rc, ok := clients.ipToRC[ip]
|
2019-09-18 16:44:27 +01:00
|
|
|
if ok {
|
2021-04-02 15:30:39 +01:00
|
|
|
rc.WhoisInfo = wi
|
|
|
|
log.Debug("clients: set whois info for runtime client %s: %+v", rc.Host, wi)
|
2021-01-27 15:32:13 +00:00
|
|
|
|
2019-09-23 18:41:14 +01:00
|
|
|
return
|
2019-09-18 16:44:27 +01:00
|
|
|
}
|
|
|
|
|
2021-04-02 15:30:39 +01:00
|
|
|
// Create a RuntimeClient implicitly so that we don't do this check
|
|
|
|
// again.
|
|
|
|
rc = &RuntimeClient{
|
2019-09-18 16:44:27 +01:00
|
|
|
Source: ClientSourceWHOIS,
|
|
|
|
}
|
2021-04-02 15:30:39 +01:00
|
|
|
|
|
|
|
rc.WhoisInfo = wi
|
|
|
|
clients.ipToRC[ip] = rc
|
|
|
|
|
|
|
|
log.Debug("clients: set whois info for runtime client with ip %s: %+v", ip, wi)
|
2019-09-18 16:44:27 +01:00
|
|
|
}
|
|
|
|
|
2021-01-27 15:32:13 +00:00
|
|
|
// AddHost adds a new IP-hostname pairing. The priorities of the sources is
|
|
|
|
// taken into account. ok is true if the pairing was added.
|
|
|
|
func (clients *clientsContainer) AddHost(ip, host string, src clientSource) (ok bool, err error) {
|
2019-04-26 13:10:29 +01:00
|
|
|
clients.lock.Lock()
|
2021-03-31 13:00:47 +01:00
|
|
|
defer clients.lock.Unlock()
|
|
|
|
|
2021-01-27 15:32:13 +00:00
|
|
|
ok = clients.addHostLocked(ip, host, src)
|
|
|
|
|
|
|
|
return ok, nil
|
2020-01-30 07:25:02 +00:00
|
|
|
}
|
2019-04-26 13:10:29 +01:00
|
|
|
|
2021-01-27 15:32:13 +00:00
|
|
|
// addHostLocked adds a new IP-hostname pairing. For internal use only.
|
|
|
|
func (clients *clientsContainer) addHostLocked(ip, host string, src clientSource) (ok bool) {
|
2021-04-02 15:30:39 +01:00
|
|
|
var rc *RuntimeClient
|
|
|
|
rc, ok = clients.ipToRC[ip]
|
2020-12-07 13:04:53 +00:00
|
|
|
if ok {
|
2021-04-02 15:30:39 +01:00
|
|
|
if rc.Source > src {
|
2020-12-07 13:04:53 +00:00
|
|
|
return false
|
|
|
|
}
|
|
|
|
|
2021-04-02 15:30:39 +01:00
|
|
|
rc.Source = src
|
2019-10-11 14:58:10 +01:00
|
|
|
} else {
|
2021-04-02 15:30:39 +01:00
|
|
|
rc = &RuntimeClient{
|
|
|
|
Host: host,
|
|
|
|
Source: src,
|
|
|
|
WhoisInfo: &RuntimeClientWhoisInfo{},
|
2019-10-11 14:58:10 +01:00
|
|
|
}
|
2020-12-07 13:04:53 +00:00
|
|
|
|
2021-04-02 15:30:39 +01:00
|
|
|
clients.ipToRC[ip] = rc
|
2019-04-26 13:10:29 +01:00
|
|
|
}
|
2020-12-07 13:04:53 +00:00
|
|
|
|
2021-04-02 15:30:39 +01:00
|
|
|
log.Debug("clients: added %q -> %q [%d]", ip, host, len(clients.ipToRC))
|
2020-12-07 13:04:53 +00:00
|
|
|
|
|
|
|
return true
|
2019-04-26 13:10:29 +01:00
|
|
|
}
|
2019-03-19 15:47:22 +00:00
|
|
|
|
2021-01-27 15:32:13 +00:00
|
|
|
// rmHostsBySrc removes all entries that match the specified source.
|
|
|
|
func (clients *clientsContainer) rmHostsBySrc(src clientSource) {
|
2020-01-30 07:25:02 +00:00
|
|
|
n := 0
|
2021-04-02 15:30:39 +01:00
|
|
|
for k, v := range clients.ipToRC {
|
2021-01-27 15:32:13 +00:00
|
|
|
if v.Source == src {
|
2021-04-02 15:30:39 +01:00
|
|
|
delete(clients.ipToRC, k)
|
2020-01-30 07:25:02 +00:00
|
|
|
n++
|
|
|
|
}
|
|
|
|
}
|
2020-12-07 13:04:53 +00:00
|
|
|
|
|
|
|
log.Debug("clients: removed %d client aliases", n)
|
2020-01-30 07:25:02 +00:00
|
|
|
}
|
|
|
|
|
2021-01-27 15:32:13 +00:00
|
|
|
// addFromHostsFile fills the client-hostname pairing index from the system's
|
|
|
|
// hosts files.
|
2019-07-09 16:19:50 +01:00
|
|
|
func (clients *clientsContainer) addFromHostsFile() {
|
2021-04-12 16:31:45 +01:00
|
|
|
if clients.etcHosts == nil {
|
|
|
|
return
|
|
|
|
}
|
|
|
|
|
|
|
|
hosts := clients.etcHosts.List()
|
2019-03-19 15:47:22 +00:00
|
|
|
|
2020-01-30 07:25:02 +00:00
|
|
|
clients.lock.Lock()
|
|
|
|
defer clients.lock.Unlock()
|
2020-11-06 14:34:40 +00:00
|
|
|
|
2021-01-27 15:32:13 +00:00
|
|
|
clients.rmHostsBySrc(ClientSourceHostsFile)
|
2020-01-30 07:25:02 +00:00
|
|
|
|
2019-04-26 13:10:29 +01:00
|
|
|
n := 0
|
2020-11-06 14:34:40 +00:00
|
|
|
for ip, names := range hosts {
|
|
|
|
for _, name := range names {
|
2021-01-27 15:32:13 +00:00
|
|
|
ok := clients.addHostLocked(ip, name, ClientSourceHostsFile)
|
2020-11-06 14:34:40 +00:00
|
|
|
if ok {
|
|
|
|
n++
|
|
|
|
}
|
2019-04-26 13:10:29 +01:00
|
|
|
}
|
2019-03-19 15:47:22 +00:00
|
|
|
}
|
|
|
|
|
2020-03-20 12:05:43 +00:00
|
|
|
log.Debug("Clients: added %d client aliases from system hosts-file", n)
|
2019-04-26 13:10:29 +01:00
|
|
|
}
|
|
|
|
|
2021-01-27 15:32:13 +00:00
|
|
|
// addFromSystemARP adds the IP-hostname pairings from the output of the arp -a
|
|
|
|
// command.
|
2019-07-09 16:19:50 +01:00
|
|
|
func (clients *clientsContainer) addFromSystemARP() {
|
2019-06-25 15:51:53 +01:00
|
|
|
if runtime.GOOS == "windows" {
|
|
|
|
return
|
|
|
|
}
|
|
|
|
|
|
|
|
cmd := exec.Command("arp", "-a")
|
2021-01-27 15:32:13 +00:00
|
|
|
log.Tracef("executing %q %q", cmd.Path, cmd.Args)
|
2019-06-25 15:51:53 +01:00
|
|
|
data, err := cmd.Output()
|
|
|
|
if err != nil || cmd.ProcessState.ExitCode() != 0 {
|
2021-01-27 15:32:13 +00:00
|
|
|
log.Debug("command %q has failed: %q code:%d",
|
2019-06-25 15:51:53 +01:00
|
|
|
cmd.Path, err, cmd.ProcessState.ExitCode())
|
|
|
|
return
|
|
|
|
}
|
|
|
|
|
2020-01-30 07:25:02 +00:00
|
|
|
clients.lock.Lock()
|
|
|
|
defer clients.lock.Unlock()
|
2021-01-27 15:32:13 +00:00
|
|
|
|
|
|
|
clients.rmHostsBySrc(ClientSourceARP)
|
2020-01-30 07:25:02 +00:00
|
|
|
|
2019-06-25 15:51:53 +01:00
|
|
|
n := 0
|
2021-01-27 15:32:13 +00:00
|
|
|
// TODO(a.garipov): Rewrite to use bufio.Scanner.
|
2019-06-25 15:51:53 +01:00
|
|
|
lines := strings.Split(string(data), "\n")
|
|
|
|
for _, ln := range lines {
|
|
|
|
open := strings.Index(ln, " (")
|
|
|
|
close := strings.Index(ln, ") ")
|
|
|
|
if open == -1 || close == -1 || open >= close {
|
|
|
|
continue
|
|
|
|
}
|
|
|
|
|
|
|
|
host := ln[:open]
|
|
|
|
ip := ln[open+2 : close]
|
2021-04-07 14:36:38 +01:00
|
|
|
if aghnet.ValidateDomainName(host) != nil || net.ParseIP(ip) == nil {
|
2019-06-25 15:51:53 +01:00
|
|
|
continue
|
|
|
|
}
|
|
|
|
|
2021-01-27 15:32:13 +00:00
|
|
|
ok := clients.addHostLocked(ip, host, ClientSourceARP)
|
2019-06-25 15:51:53 +01:00
|
|
|
if ok {
|
|
|
|
n++
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2021-01-27 15:32:13 +00:00
|
|
|
log.Debug("clients: added %d client aliases from 'arp -a' command output", n)
|
2019-06-25 15:51:53 +01:00
|
|
|
}
|
|
|
|
|
2021-04-15 15:52:53 +01:00
|
|
|
// updateFromDHCP adds the clients that have a non-empty hostname from the DHCP
|
2021-01-27 15:32:13 +00:00
|
|
|
// server.
|
2021-04-15 15:52:53 +01:00
|
|
|
func (clients *clientsContainer) updateFromDHCP(add bool) {
|
2019-11-22 11:21:08 +00:00
|
|
|
if clients.dhcpServer == nil {
|
|
|
|
return
|
|
|
|
}
|
2020-01-30 07:25:02 +00:00
|
|
|
|
|
|
|
clients.lock.Lock()
|
|
|
|
defer clients.lock.Unlock()
|
|
|
|
|
2021-01-27 15:32:13 +00:00
|
|
|
clients.rmHostsBySrc(ClientSourceDHCP)
|
2020-01-30 07:25:02 +00:00
|
|
|
|
2021-04-15 15:52:53 +01:00
|
|
|
if !add {
|
|
|
|
return
|
|
|
|
}
|
|
|
|
|
2020-01-30 07:25:02 +00:00
|
|
|
leases := clients.dhcpServer.Leases(dhcpd.LeasesAll)
|
2019-10-16 10:03:51 +01:00
|
|
|
n := 0
|
2019-09-12 14:15:10 +01:00
|
|
|
for _, l := range leases {
|
2021-01-27 15:32:13 +00:00
|
|
|
if l.Hostname == "" {
|
2019-09-12 14:15:10 +01:00
|
|
|
continue
|
|
|
|
}
|
2021-01-27 15:32:13 +00:00
|
|
|
|
|
|
|
ok := clients.addHostLocked(l.IP.String(), l.Hostname, ClientSourceDHCP)
|
2019-10-16 10:03:51 +01:00
|
|
|
if ok {
|
|
|
|
n++
|
|
|
|
}
|
2019-09-12 14:15:10 +01:00
|
|
|
}
|
2021-01-27 15:32:13 +00:00
|
|
|
|
|
|
|
log.Debug("clients: added %d client aliases from dhcp", n)
|
2019-09-12 14:15:10 +01:00
|
|
|
}
|