Pull request: 3597 arpdb
Merge in DNS/adguard-home from 3597-wrt-netlink to master
Updates #3597.
Squashed commit of the following:
commit 1709582cd204bb80c84775feabae8723ed3340f6
Merge: 0507b6ed e7b3c996
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date: Tue Mar 15 20:25:18 2022 +0300
Merge branch 'master' into 3597-wrt-netlink
commit 0507b6ede1162554ca8ac7399d827264aca64f98
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date: Tue Mar 15 20:21:29 2022 +0300
all: imp code
commit 71f9758d854b3e2cf90cbd3655ae4818cfbcf528
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date: Wed Mar 9 18:03:48 2022 +0500
aghnet: imp naming
commit c949e765104f130aa3e5ba465bdebc3286bebe44
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date: Wed Mar 9 17:26:30 2022 +0500
all: imp code, docs
commit cf605ddb401b6e7b0a7a4bb1b175a4dc588d253a
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date: Tue Mar 8 15:33:52 2022 +0500
all: imp code, docs
commit 2960c6549a7e4944cc0072ca47a0cd4e82ec850e
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date: Sun Mar 6 21:34:58 2022 +0500
all: imp code & docs, fix tests
commit 29c049f3aee91a826c3416961686396d562a7066
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date: Wed Mar 2 20:45:34 2022 +0300
all: add arpdb
This commit is contained in:
Eugene Burkov
parent
e7b3c9969b
commit
573cbafe3f
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@ -27,6 +27,8 @@ and this project adheres to
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### Changed
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- Improved detection of runtime clients through more resilient ARP processing
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([#3597]).
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- The TTL of responses served from the optimistic cache is now lowered to 10
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seconds.
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- Domain-specific private reverse DNS upstream servers are now validated to
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@ -89,6 +91,7 @@ In this release, the schema version has changed from 12 to 13.
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[#3367]: https://github.com/AdguardTeam/AdGuardHome/issues/3367
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[#3381]: https://github.com/AdguardTeam/AdGuardHome/issues/3381
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[#3503]: https://github.com/AdguardTeam/AdGuardHome/issues/3503
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[#3597]: https://github.com/AdguardTeam/AdGuardHome/issues/3597
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[#3978]: https://github.com/AdguardTeam/AdGuardHome/issues/3978
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[#4166]: https://github.com/AdguardTeam/AdGuardHome/issues/4166
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[#4213]: https://github.com/AdguardTeam/AdGuardHome/issues/4213
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@ -0,0 +1,239 @@
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package aghnet
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import (
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"bufio"
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"fmt"
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"io"
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"net"
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"strings"
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"sync"
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"github.com/AdguardTeam/AdGuardHome/internal/aghos"
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"github.com/AdguardTeam/golibs/errors"
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"github.com/AdguardTeam/golibs/netutil"
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)
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// ARPDB: The Network Neighborhood Database
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// ARPDB stores and refreshes the network neighborhood reported by ARP (Address
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// Resolution Protocol).
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type ARPDB interface {
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// Refresh updates the stored data. It must be safe for concurrent use.
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Refresh() (err error)
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// Neighbors returnes the last set of data reported by ARP. Both the method
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// and it's result must be safe for concurrent use.
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Neighbors() (ns []Neighbor)
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}
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// NewARPDB returns the ARPDB properly initialized for the OS.
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func NewARPDB() (arp ARPDB, err error) {
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arp = newARPDB()
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err = arp.Refresh()
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if err != nil {
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return nil, fmt.Errorf("arpdb initial refresh: %w", err)
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}
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return arp, nil
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}
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// Empty ARPDB implementation
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// EmptyARPDB is the ARPDB implementation that does nothing.
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type EmptyARPDB struct{}
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// type check
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var _ ARPDB = EmptyARPDB{}
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// Refresh implements the ARPDB interface for EmptyARPContainer. It does
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// nothing and always returns nil error.
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func (EmptyARPDB) Refresh() (err error) { return nil }
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// Neighbors implements the ARPDB interface for EmptyARPContainer. It always
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// returns nil.
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func (EmptyARPDB) Neighbors() (ns []Neighbor) { return nil }
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// ARPDB Helper Types
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// Neighbor is the pair of IP address and MAC address reported by ARP.
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type Neighbor struct {
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// Name is the hostname of the neighbor. Empty name is valid since not each
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// implementation of ARP is able to retrieve that.
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Name string
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// IP contains either IPv4 or IPv6.
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IP net.IP
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// MAC contains the hardware address.
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MAC net.HardwareAddr
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}
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// Clone returns the deep copy of n.
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func (n Neighbor) Clone() (clone Neighbor) {
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return Neighbor{
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Name: n.Name,
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IP: netutil.CloneIP(n.IP),
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MAC: netutil.CloneMAC(n.MAC),
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}
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}
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// neighs is the helper type that stores neighbors to avoid copying its methods
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// among all the ARPDB implementations.
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type neighs struct {
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mu *sync.RWMutex
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ns []Neighbor
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}
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// len returns the length of the neighbors slice. It's safe for concurrent use.
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func (ns *neighs) len() (l int) {
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ns.mu.RLock()
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defer ns.mu.RUnlock()
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return len(ns.ns)
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}
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// clone returns a deep copy of the underlying neighbors slice. It's safe for
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// concurrent use.
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func (ns *neighs) clone() (cloned []Neighbor) {
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ns.mu.RLock()
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defer ns.mu.RUnlock()
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cloned = make([]Neighbor, len(ns.ns))
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for i, n := range ns.ns {
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cloned[i] = n.Clone()
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}
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return cloned
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}
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// reset replaces the underlying slice with the new one. It's safe for
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// concurrent use.
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func (ns *neighs) reset(with []Neighbor) {
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ns.mu.Lock()
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defer ns.mu.Unlock()
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ns.ns = with
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}
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// Command ARPDB
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// parseNeighsFunc parses the text from sc as if it'd be an output of some
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// ARP-related command. lenHint is a hint for the size of the allocated slice
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// of Neighbors.
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type parseNeighsFunc func(sc *bufio.Scanner, lenHint int) (ns []Neighbor)
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// runCmdFunc is the function that runs some command and returns its output
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// wrapped to be a io.Reader.
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type runCmdFunc func() (r io.Reader, err error)
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// cmdARPDB is the implementation of the ARPDB that uses command line to
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// retrieve data.
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type cmdARPDB struct {
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parse parseNeighsFunc
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runcmd runCmdFunc
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ns *neighs
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}
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// type check
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var _ ARPDB = (*cmdARPDB)(nil)
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// runCmd runs the cmd with it's args and returns the result wrapped to be an
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// io.Reader. The error is returned either if the exit code retured by command
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// not equals 0 or the execution itself failed.
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func runCmd(cmd string, args ...string) (r io.Reader, err error) {
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var code int
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var out string
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code, out, err = aghos.RunCommand(cmd, args...)
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if err != nil {
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return nil, err
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} else if code != 0 {
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return nil, fmt.Errorf("unexpected exit code %d", code)
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}
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return strings.NewReader(out), nil
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}
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// Refresh implements the ARPDB interface for *cmdARPDB.
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func (arp *cmdARPDB) Refresh() (err error) {
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defer func() { err = errors.Annotate(err, "cmd arpdb: %w") }()
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var r io.Reader
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r, err = arp.runcmd()
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if err != nil {
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return fmt.Errorf("running command: %w", err)
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}
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sc := bufio.NewScanner(r)
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ns := arp.parse(sc, arp.ns.len())
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if err = sc.Err(); err != nil {
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return fmt.Errorf("scanning the output: %w", err)
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}
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arp.ns.reset(ns)
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return nil
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}
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// Neighbors implements the ARPDB interface for *cmdARPDB.
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func (arp *cmdARPDB) Neighbors() (ns []Neighbor) {
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return arp.ns.clone()
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}
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// Composite ARPDB
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// arpdbs is the ARPDB that combines several ARPDB implementations and
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// consequently switches between those.
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type arpdbs struct {
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// arps is the set of ARPDB implementations to range through.
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arps []ARPDB
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// last is the last succeeded ARPDB index.
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last int
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}
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// newARPDBs returns a properly initialized *arpdbs. It begins refreshing from
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// the first of arps.
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func newARPDBs(arps ...ARPDB) (arp *arpdbs) {
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return &arpdbs{
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arps: arps,
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last: 0,
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}
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}
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// type check
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var _ ARPDB = (*arpdbs)(nil)
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// Refresh implements the ARPDB interface for *arpdbs.
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func (arp *arpdbs) Refresh() (err error) {
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var errs []error
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l := len(arp.arps)
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// Start from the last succeeded implementation.
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for i := 0; i < l; i++ {
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cur := (arp.last + i) % l
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err = arp.arps[cur].Refresh()
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if err == nil {
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// The succeeded implementation found so update the last succeeded
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// index.
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arp.last = cur
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return nil
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}
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errs = append(errs, err)
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}
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if len(errs) > 0 {
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err = errors.List("each arpdb failed", errs...)
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}
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return err
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}
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// Neighbors implements the ARPDB interface for *arpdbs.
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func (arp *arpdbs) Neighbors() (ns []Neighbor) {
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if l := len(arp.arps); l > 0 && arp.last < l {
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return arp.arps[arp.last].Neighbors()
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}
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return nil
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}
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@ -0,0 +1,70 @@
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//go:build darwin || freebsd
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// +build darwin freebsd
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package aghnet
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import (
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"bufio"
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"net"
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"strings"
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"sync"
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"github.com/AdguardTeam/golibs/log"
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"github.com/AdguardTeam/golibs/netutil"
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)
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func newARPDB() *cmdARPDB {
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return &cmdARPDB{
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parse: parseArpA,
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runcmd: rcArpA,
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ns: &neighs{
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mu: &sync.RWMutex{},
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ns: make([]Neighbor, 0),
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},
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}
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}
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// parseArpA parses the output of the "arp -a" command on macOS and FreeBSD.
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// The expected input format:
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//
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// host.name (192.168.0.1) at ff:ff:ff:ff:ff:ff on en0 ifscope [ethernet]
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//
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func parseArpA(sc *bufio.Scanner, lenHint int) (ns []Neighbor) {
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ns = make([]Neighbor, 0, lenHint)
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for sc.Scan() {
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ln := sc.Text()
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fields := strings.Fields(ln)
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if len(fields) < 4 {
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continue
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}
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n := Neighbor{}
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if ipStr := fields[1]; len(ipStr) < 2 {
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continue
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} else if ip := net.ParseIP(ipStr[1 : len(ipStr)-1]); ip == nil {
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continue
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} else {
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n.IP = ip
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}
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hwStr := fields[3]
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if mac, err := net.ParseMAC(hwStr); err != nil {
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continue
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} else {
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n.MAC = mac
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}
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host := fields[0]
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if err := netutil.ValidateDomainName(host); err != nil {
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log.Debug("parsing arp output: %s", err)
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} else {
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n.Name = host
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}
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ns = append(ns, n)
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}
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return ns
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}
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@ -0,0 +1,23 @@
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//go:build darwin || freebsd
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// +build darwin freebsd
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package aghnet
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import (
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"net"
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)
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const arpAOutput = `
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hostname.one (192.168.1.2) at ab:cd:ef:ab:cd:ef on en0 ifscope [ethernet]
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hostname.two (::ffff:ffff) at ef:cd:ab:ef:cd:ab on em0 expires in 1198 seconds [ethernet]
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`
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var wantNeighs = []Neighbor{{
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Name: "hostname.one",
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IP: net.IPv4(192, 168, 1, 2),
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MAC: net.HardwareAddr{0xAB, 0xCD, 0xEF, 0xAB, 0xCD, 0xEF},
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}, {
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Name: "hostname.two",
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IP: net.ParseIP("::ffff:ffff"),
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MAC: net.HardwareAddr{0xEF, 0xCD, 0xAB, 0xEF, 0xCD, 0xAB},
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}}
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@ -0,0 +1,230 @@
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//go:build linux
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// +build linux
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package aghnet
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import (
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"bufio"
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"fmt"
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"io"
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"io/fs"
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"net"
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"strings"
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"sync"
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"github.com/AdguardTeam/AdGuardHome/internal/aghos"
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"github.com/AdguardTeam/golibs/log"
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"github.com/AdguardTeam/golibs/netutil"
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"github.com/AdguardTeam/golibs/stringutil"
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)
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func newARPDB() (arp *arpdbs) {
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// Use the common storage among the implementations.
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ns := &neighs{
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mu: &sync.RWMutex{},
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ns: make([]Neighbor, 0),
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}
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var parseF parseNeighsFunc
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if aghos.IsOpenWrt() {
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parseF = parseArpAWrt
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} else {
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parseF = parseArpA
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}
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return newARPDBs(
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// Try /proc/net/arp first.
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&fsysARPDB{ns: ns, fsys: aghos.RootDirFS(), filename: "proc/net/arp"},
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// Try "arp -a" then.
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&cmdARPDB{parse: parseF, runcmd: rcArpA, ns: ns},
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// Try "ip neigh" finally.
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&cmdARPDB{parse: parseIPNeigh, runcmd: rcIPNeigh, ns: ns},
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)
|
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}
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// fsysARPDB accesses the ARP cache file to update the database.
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type fsysARPDB struct {
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ns *neighs
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fsys fs.FS
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filename string
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}
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// type check
|
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var _ ARPDB = (*fsysARPDB)(nil)
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// Refresh implements the ARPDB interface for *fsysARPDB.
|
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func (arp *fsysARPDB) Refresh() (err error) {
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var f fs.File
|
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f, err = arp.fsys.Open(arp.filename)
|
||||
if err != nil {
|
||||
return fmt.Errorf("opening %q: %w", arp.filename, err)
|
||||
}
|
||||
|
||||
sc := bufio.NewScanner(f)
|
||||
// Skip the header.
|
||||
if !sc.Scan() {
|
||||
return nil
|
||||
} else if err = sc.Err(); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
ns := make([]Neighbor, 0, arp.ns.len())
|
||||
for sc.Scan() {
|
||||
ln := sc.Text()
|
||||
fields := stringutil.SplitTrimmed(ln, " ")
|
||||
if len(fields) != 6 {
|
||||
continue
|
||||
}
|
||||
|
||||
n := Neighbor{}
|
||||
if n.IP = net.ParseIP(fields[0]); n.IP == nil || n.IP.IsUnspecified() {
|
||||
continue
|
||||
} else if n.MAC, err = net.ParseMAC(fields[3]); err != nil {
|
||||
continue
|
||||
}
|
||||
|
||||
ns = append(ns, n)
|
||||
}
|
||||
|
||||
arp.ns.reset(ns)
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
// Neighbors implements the ARPDB interface for *fsysARPDB.
|
||||
func (arp *fsysARPDB) Neighbors() (ns []Neighbor) {
|
||||
return arp.ns.clone()
|
||||
}
|
||||
|
||||
// parseArpAWrt parses the output of the "arp -a" command on OpenWrt. The
|
||||
// expected input format:
|
||||
//
|
||||
// IP address HW type Flags HW address Mask Device
|
||||
// 192.168.11.98 0x1 0x2 5a:92:df:a9:7e:28 * wan
|
||||
//
|
||||
func parseArpAWrt(sc *bufio.Scanner, lenHint int) (ns []Neighbor) {
|
||||
if !sc.Scan() {
|
||||
// Skip the header.
|
||||
return
|
||||
}
|
||||
|
||||
ns = make([]Neighbor, 0, lenHint)
|
||||
for sc.Scan() {
|
||||
ln := sc.Text()
|
||||
|
||||
fields := strings.Fields(ln)
|
||||
if len(fields) < 4 {
|
||||
continue
|
||||
}
|
||||
|
||||
n := Neighbor{}
|
||||
|
||||
if ip := net.ParseIP(fields[0]); ip == nil || n.IP.IsUnspecified() {
|
||||
continue
|
||||
} else {
|
||||
n.IP = ip
|
||||
}
|
||||
|
||||
hwStr := fields[3]
|
||||
if mac, err := net.ParseMAC(hwStr); err != nil {
|
||||
log.Debug("parsing arp output: %s", err)
|
||||
|
||||
continue
|
||||
} else {
|
||||
n.MAC = mac
|
||||
}
|
||||
|
||||
ns = append(ns, n)
|
||||
}
|
||||
|
||||
return ns
|
||||
}
|
||||
|
||||
// parseArpA parses the output of the "arp -a" command on Linux. The expected
|
||||
// input format:
|
||||
//
|
||||
// hostname (192.168.1.1) at ab:cd:ef:ab:cd:ef [ether] on enp0s3
|
||||
//
|
||||
func parseArpA(sc *bufio.Scanner, lenHint int) (ns []Neighbor) {
|
||||
ns = make([]Neighbor, 0, lenHint)
|
||||
for sc.Scan() {
|
||||
ln := sc.Text()
|
||||
|
||||
fields := strings.Fields(ln)
|
||||
if len(fields) < 4 {
|
||||
continue
|
||||
}
|
||||
|
||||
n := Neighbor{}
|
||||
|
||||
if ipStr := fields[1]; len(ipStr) < 2 {
|
||||
continue
|
||||
} else if ip := net.ParseIP(ipStr[1 : len(ipStr)-1]); ip == nil {
|
||||
continue
|
||||
} else {
|
||||
n.IP = ip
|
||||
}
|
||||
|
||||
hwStr := fields[3]
|
||||
if mac, err := net.ParseMAC(hwStr); err != nil {
|
||||
log.Debug("parsing arp output: %s", err)
|
||||
|
||||
continue
|
||||
} else {
|
||||
n.MAC = mac
|
||||
}
|
||||
|
||||
host := fields[0]
|
||||
if verr := netutil.ValidateDomainName(host); verr != nil {
|
||||
log.Debug("parsing arp output: %s", verr)
|
||||
} else {
|
||||
n.Name = host
|
||||
}
|
||||
|
||||
ns = append(ns, n)
|
||||
}
|
||||
|
||||
return ns
|
||||
}
|
||||
|
||||
// rcIPNeigh runs "ip neigh".
|
||||
func rcIPNeigh() (r io.Reader, err error) {
|
||||
return runCmd("ip", "neigh")
|
||||
}
|
||||
|
||||
// parseIPNeigh parses the output of the "ip neigh" command on Linux. The
|
||||
// expected input format:
|
||||
//
|
||||
// 192.168.1.1 dev enp0s3 lladdr ab:cd:ef:ab:cd:ef REACHABLE
|
||||
//
|
||||
func parseIPNeigh(sc *bufio.Scanner, lenHint int) (ns []Neighbor) {
|
||||
ns = make([]Neighbor, 0, lenHint)
|
||||
for sc.Scan() {
|
||||
ln := sc.Text()
|
||||
|
||||
fields := strings.Fields(ln)
|
||||
if len(fields) < 5 {
|
||||
continue
|
||||
}
|
||||
|
||||
n := Neighbor{}
|
||||
|
||||
if ip := net.ParseIP(fields[0]); ip == nil {
|
||||
continue
|
||||
} else {
|
||||
n.IP = ip
|
||||
}
|
||||
|
||||
if mac, err := net.ParseMAC(fields[4]); err != nil {
|
||||
log.Debug("parsing arp output: %s", err)
|
||||
|
||||
continue
|
||||
} else {
|
||||
n.MAC = mac
|
||||
}
|
||||
|
||||
ns = append(ns, n)
|
||||
}
|
||||
|
||||
return ns
|
||||
}
|
||||
|
|
@ -0,0 +1,84 @@
|
|||
//go:build linux
|
||||
// +build linux
|
||||
|
||||
package aghnet
|
||||
|
||||
import (
|
||||
"io"
|
||||
"net"
|
||||
"strings"
|
||||
"sync"
|
||||
"testing"
|
||||
|
||||
"github.com/stretchr/testify/assert"
|
||||
"github.com/stretchr/testify/require"
|
||||
)
|
||||
|
||||
const arpAOutputWrt = `
|
||||
IP address HW type Flags HW address Mask Device
|
||||
192.168.1.2 0x1 0x2 ab:cd:ef:ab:cd:ef * wan
|
||||
::ffff:ffff 0x1 0x2 ef:cd:ab:ef:cd:ab * wan`
|
||||
|
||||
const arpAOutput = `
|
||||
? (192.168.1.2) at ab:cd:ef:ab:cd:ef on en0 ifscope [ethernet]
|
||||
? (::ffff:ffff) at ef:cd:ab:ef:cd:ab on em0 expires in 100 seconds [ethernet]`
|
||||
|
||||
const ipNeighOutput = `
|
||||
192.168.1.2 dev enp0s3 lladdr ab:cd:ef:ab:cd:ef DELAY
|
||||
::ffff:ffff dev enp0s3 lladdr ef:cd:ab:ef:cd:ab router STALE`
|
||||
|
||||
var wantNeighs = []Neighbor{{
|
||||
IP: net.IPv4(192, 168, 1, 2),
|
||||
MAC: net.HardwareAddr{0xAB, 0xCD, 0xEF, 0xAB, 0xCD, 0xEF},
|
||||
}, {
|
||||
IP: net.ParseIP("::ffff:ffff"),
|
||||
MAC: net.HardwareAddr{0xEF, 0xCD, 0xAB, 0xEF, 0xCD, 0xAB},
|
||||
}}
|
||||
|
||||
func TestFSysARPDB(t *testing.T) {
|
||||
a := &fsysARPDB{
|
||||
ns: &neighs{
|
||||
mu: &sync.RWMutex{},
|
||||
ns: make([]Neighbor, 0),
|
||||
},
|
||||
fsys: testdata,
|
||||
filename: "proc_net_arp",
|
||||
}
|
||||
|
||||
err := a.Refresh()
|
||||
require.NoError(t, err)
|
||||
|
||||
ns := a.Neighbors()
|
||||
assert.Equal(t, wantNeighs, ns)
|
||||
}
|
||||
|
||||
func TestCmdARPDB_arpawrt(t *testing.T) {
|
||||
a := &cmdARPDB{
|
||||
parse: parseArpAWrt,
|
||||
runcmd: func() (r io.Reader, err error) { return strings.NewReader(arpAOutputWrt), nil },
|
||||
ns: &neighs{
|
||||
mu: &sync.RWMutex{},
|
||||
ns: make([]Neighbor, 0),
|
||||
},
|
||||
}
|
||||
|
||||
err := a.Refresh()
|
||||
require.NoError(t, err)
|
||||
|
||||
assert.Equal(t, wantNeighs, a.Neighbors())
|
||||
}
|
||||
|
||||
func TestCmdARPDB_ipneigh(t *testing.T) {
|
||||
a := &cmdARPDB{
|
||||
parse: parseIPNeigh,
|
||||
runcmd: func() (r io.Reader, err error) { return strings.NewReader(ipNeighOutput), nil },
|
||||
ns: &neighs{
|
||||
mu: &sync.RWMutex{},
|
||||
ns: make([]Neighbor, 0),
|
||||
},
|
||||
}
|
||||
err := a.Refresh()
|
||||
require.NoError(t, err)
|
||||
|
||||
assert.Equal(t, wantNeighs, a.Neighbors())
|
||||
}
|
||||
|
|
@ -0,0 +1,67 @@
|
|||
//go:build openbsd
|
||||
// +build openbsd
|
||||
|
||||
package aghnet
|
||||
|
||||
import (
|
||||
"bufio"
|
||||
"net"
|
||||
"strings"
|
||||
"sync"
|
||||
|
||||
"github.com/AdguardTeam/golibs/log"
|
||||
)
|
||||
|
||||
func newARPDB() *cmdARPDB {
|
||||
return &cmdARPDB{
|
||||
runcmd: rcArpA,
|
||||
parse: parseArpA,
|
||||
ns: &neighs{
|
||||
mu: &sync.RWMutex{},
|
||||
ns: make([]Neighbor, 0),
|
||||
},
|
||||
}
|
||||
}
|
||||
|
||||
// parseArpA parses the output of the "arp -a" command on OpenBSD. The expected
|
||||
// input format:
|
||||
//
|
||||
// Host Ethernet Address Netif Expire Flags
|
||||
// 192.168.1.1 ab:cd:ef:ab:cd:ef em0 19m59s
|
||||
//
|
||||
func parseArpA(sc *bufio.Scanner, lenHint int) (ns []Neighbor) {
|
||||
// Skip the header.
|
||||
if !sc.Scan() {
|
||||
return nil
|
||||
}
|
||||
|
||||
ns = make([]Neighbor, 0, lenHint)
|
||||
for sc.Scan() {
|
||||
ln := sc.Text()
|
||||
|
||||
fields := strings.Fields(ln)
|
||||
if len(fields) < 2 {
|
||||
continue
|
||||
}
|
||||
|
||||
n := Neighbor{}
|
||||
|
||||
if ip := net.ParseIP(fields[0]); ip == nil {
|
||||
continue
|
||||
} else {
|
||||
n.IP = ip
|
||||
}
|
||||
|
||||
if mac, err := net.ParseMAC(fields[1]); err != nil {
|
||||
log.Debug("parsing arp output: %s", err)
|
||||
|
||||
continue
|
||||
} else {
|
||||
n.MAC = mac
|
||||
}
|
||||
|
||||
ns = append(ns, n)
|
||||
}
|
||||
|
||||
return ns
|
||||
}
|
||||
|
|
@ -0,0 +1,22 @@
|
|||
//go:build openbsd
|
||||
// +build openbsd
|
||||
|
||||
package aghnet
|
||||
|
||||
import (
|
||||
"net"
|
||||
)
|
||||
|
||||
const arpAOutput = `
|
||||
Host Ethernet Address Netif Expire Flags
|
||||
192.168.1.2 ab:cd:ef:ab:cd:ef em0 19m56s
|
||||
::ffff:ffff ef:cd:ab:ef:cd:ab em0 permanent l
|
||||
`
|
||||
|
||||
var wantNeighs = []Neighbor{{
|
||||
IP: net.IPv4(192, 168, 1, 2),
|
||||
MAC: net.HardwareAddr{0xAB, 0xCD, 0xEF, 0xAB, 0xCD, 0xEF},
|
||||
}, {
|
||||
IP: net.ParseIP("::ffff:ffff"),
|
||||
MAC: net.HardwareAddr{0xEF, 0xCD, 0xAB, 0xEF, 0xCD, 0xAB},
|
||||
}}
|
||||
|
|
@ -0,0 +1,168 @@
|
|||
package aghnet
|
||||
|
||||
import (
|
||||
"io"
|
||||
"net"
|
||||
"strings"
|
||||
"sync"
|
||||
"testing"
|
||||
|
||||
"github.com/AdguardTeam/golibs/errors"
|
||||
"github.com/AdguardTeam/golibs/testutil"
|
||||
"github.com/stretchr/testify/assert"
|
||||
"github.com/stretchr/testify/require"
|
||||
)
|
||||
|
||||
// TestARPDB is the mock implementation of ARPDB to use in tests.
|
||||
type TestARPDB struct {
|
||||
OnRefresh func() (err error)
|
||||
OnNeighbors func() (ns []Neighbor)
|
||||
}
|
||||
|
||||
// Refresh implements the ARPDB interface for *TestARPDB.
|
||||
func (arp *TestARPDB) Refresh() (err error) {
|
||||
return arp.OnRefresh()
|
||||
}
|
||||
|
||||
// Neighbors implements the ARPDB interface for *TestARPDB.
|
||||
func (arp *TestARPDB) Neighbors() (ns []Neighbor) {
|
||||
return arp.OnNeighbors()
|
||||
}
|
||||
|
||||
func TestARPDBS(t *testing.T) {
|
||||
knownIP := net.IP{1, 2, 3, 4}
|
||||
knownMAC := net.HardwareAddr{0xAB, 0xCD, 0xEF, 0xAB, 0xCD, 0xEF}
|
||||
|
||||
succRefrCount, failRefrCount := 0, 0
|
||||
clnp := func() {
|
||||
succRefrCount, failRefrCount = 0, 0
|
||||
}
|
||||
|
||||
succDB := &TestARPDB{
|
||||
OnRefresh: func() (err error) { succRefrCount++; return nil },
|
||||
OnNeighbors: func() (ns []Neighbor) {
|
||||
return []Neighbor{{Name: "abc", IP: knownIP, MAC: knownMAC}}
|
||||
},
|
||||
}
|
||||
failDB := &TestARPDB{
|
||||
OnRefresh: func() (err error) { failRefrCount++; return errors.Error("refresh failed") },
|
||||
OnNeighbors: func() (ns []Neighbor) { return nil },
|
||||
}
|
||||
|
||||
t.Run("begin_with_success", func(t *testing.T) {
|
||||
t.Cleanup(clnp)
|
||||
|
||||
a := newARPDBs(succDB, failDB)
|
||||
err := a.Refresh()
|
||||
require.NoError(t, err)
|
||||
|
||||
assert.Equal(t, 1, succRefrCount)
|
||||
assert.Zero(t, failRefrCount)
|
||||
assert.NotEmpty(t, a.Neighbors())
|
||||
})
|
||||
|
||||
t.Run("begin_with_fail", func(t *testing.T) {
|
||||
t.Cleanup(clnp)
|
||||
|
||||
a := newARPDBs(failDB, succDB)
|
||||
err := a.Refresh()
|
||||
require.NoError(t, err)
|
||||
|
||||
assert.Equal(t, 1, succRefrCount)
|
||||
assert.Equal(t, 1, failRefrCount)
|
||||
assert.NotEmpty(t, a.Neighbors())
|
||||
})
|
||||
|
||||
t.Run("fail_only", func(t *testing.T) {
|
||||
t.Cleanup(clnp)
|
||||
|
||||
wantMsg := `each arpdb failed: 2 errors: "refresh failed", "refresh failed"`
|
||||
|
||||
a := newARPDBs(failDB, failDB)
|
||||
err := a.Refresh()
|
||||
require.Error(t, err)
|
||||
|
||||
testutil.AssertErrorMsg(t, wantMsg, err)
|
||||
|
||||
assert.Equal(t, 2, failRefrCount)
|
||||
assert.Empty(t, a.Neighbors())
|
||||
})
|
||||
|
||||
t.Run("fail_after_success", func(t *testing.T) {
|
||||
t.Cleanup(clnp)
|
||||
|
||||
shouldFail := false
|
||||
unstableDB := &TestARPDB{
|
||||
OnRefresh: func() (err error) {
|
||||
if shouldFail {
|
||||
err = errors.Error("unstable failed")
|
||||
}
|
||||
shouldFail = !shouldFail
|
||||
|
||||
return err
|
||||
},
|
||||
OnNeighbors: func() (ns []Neighbor) {
|
||||
if !shouldFail {
|
||||
return failDB.OnNeighbors()
|
||||
}
|
||||
|
||||
return succDB.OnNeighbors()
|
||||
},
|
||||
}
|
||||
a := newARPDBs(unstableDB, succDB)
|
||||
|
||||
// Unstable ARPDB should refresh successfully.
|
||||
err := a.Refresh()
|
||||
require.NoError(t, err)
|
||||
|
||||
assert.Zero(t, succRefrCount)
|
||||
assert.NotEmpty(t, a.Neighbors())
|
||||
|
||||
// Unstable ARPDB should fail and the succDB should be used.
|
||||
err = a.Refresh()
|
||||
require.NoError(t, err)
|
||||
|
||||
assert.Equal(t, 1, succRefrCount)
|
||||
assert.NotEmpty(t, a.Neighbors())
|
||||
|
||||
// Only the last succeeded ARPDB should be used.
|
||||
err = a.Refresh()
|
||||
require.NoError(t, err)
|
||||
|
||||
assert.Equal(t, 2, succRefrCount)
|
||||
assert.NotEmpty(t, a.Neighbors())
|
||||
})
|
||||
|
||||
t.Run("empty", func(t *testing.T) {
|
||||
a := newARPDBs()
|
||||
require.NoError(t, a.Refresh())
|
||||
|
||||
assert.Empty(t, a.Neighbors())
|
||||
})
|
||||
}
|
||||
|
||||
func TestCmdARPDB_arpa(t *testing.T) {
|
||||
a := &cmdARPDB{
|
||||
parse: parseArpA,
|
||||
ns: &neighs{
|
||||
mu: &sync.RWMutex{},
|
||||
ns: make([]Neighbor, 0),
|
||||
},
|
||||
}
|
||||
|
||||
t.Run("arp_a", func(t *testing.T) {
|
||||
a.runcmd = func() (r io.Reader, err error) { return strings.NewReader(arpAOutput), nil }
|
||||
|
||||
err := a.Refresh()
|
||||
require.NoError(t, err)
|
||||
|
||||
assert.Equal(t, wantNeighs, a.Neighbors())
|
||||
})
|
||||
|
||||
t.Run("runcmd_error", func(t *testing.T) {
|
||||
a.runcmd = func() (r io.Reader, err error) { return nil, errors.Error("can't run") }
|
||||
|
||||
err := a.Refresh()
|
||||
testutil.AssertErrorMsg(t, "cmd arpdb: running command: can't run", err)
|
||||
})
|
||||
}
|
||||
|
|
@ -0,0 +1,13 @@
|
|||
//go:build !windows
|
||||
// +build !windows
|
||||
|
||||
package aghnet
|
||||
|
||||
import (
|
||||
"io"
|
||||
)
|
||||
|
||||
// rcArpA runs "arp -a".
|
||||
func rcArpA() (r io.Reader, err error) {
|
||||
return runCmd("arp", "-a")
|
||||
}
|
||||
|
|
@ -0,0 +1,70 @@
|
|||
//go:build windows
|
||||
// +build windows
|
||||
|
||||
package aghnet
|
||||
|
||||
import (
|
||||
"bufio"
|
||||
"io"
|
||||
"net"
|
||||
"strings"
|
||||
"sync"
|
||||
)
|
||||
|
||||
func newARPDB() *cmdARPDB {
|
||||
return &cmdARPDB{
|
||||
runcmd: rcArpA,
|
||||
ns: &neighs{
|
||||
mu: &sync.RWMutex{},
|
||||
ns: make([]Neighbor, 0),
|
||||
},
|
||||
parse: parseArpA,
|
||||
}
|
||||
}
|
||||
|
||||
// rcArpA runs "arp /a".
|
||||
func rcArpA() (r io.Reader, err error) {
|
||||
return runCmd("arp", "/a")
|
||||
}
|
||||
|
||||
// parseArpA parses the output of the "arp /a" command on Windows. The expected
|
||||
// input format (the first line is empty):
|
||||
//
|
||||
//
|
||||
// Interface: 192.168.56.16 --- 0x7
|
||||
// Internet Address Physical Address Type
|
||||
// 192.168.56.1 0a-00-27-00-00-00 dynamic
|
||||
// 192.168.56.255 ff-ff-ff-ff-ff-ff static
|
||||
//
|
||||
func parseArpA(sc *bufio.Scanner, lenHint int) (ns []Neighbor) {
|
||||
ns = make([]Neighbor, 0, lenHint)
|
||||
for sc.Scan() {
|
||||
ln := sc.Text()
|
||||
if ln == "" {
|
||||
continue
|
||||
}
|
||||
|
||||
fields := strings.Fields(ln)
|
||||
if len(fields) != 3 {
|
||||
continue
|
||||
}
|
||||
|
||||
n := Neighbor{}
|
||||
|
||||
if ip := net.ParseIP(fields[0]); ip == nil {
|
||||
continue
|
||||
} else {
|
||||
n.IP = ip
|
||||
}
|
||||
|
||||
if mac, err := net.ParseMAC(fields[1]); err != nil {
|
||||
continue
|
||||
} else {
|
||||
n.MAC = mac
|
||||
}
|
||||
|
||||
ns = append(ns, n)
|
||||
}
|
||||
|
||||
return ns
|
||||
}
|
||||
|
|
@ -0,0 +1,23 @@
|
|||
//go:build windows
|
||||
// +build windows
|
||||
|
||||
package aghnet
|
||||
|
||||
import (
|
||||
"net"
|
||||
)
|
||||
|
||||
const arpAOutput = `
|
||||
|
||||
Interface: 192.168.1.1 --- 0x7
|
||||
Internet Address Physical Address Type
|
||||
192.168.1.2 ab-cd-ef-ab-cd-ef dynamic
|
||||
::ffff:ffff ef-cd-ab-ef-cd-ab static`
|
||||
|
||||
var wantNeighs = []Neighbor{{
|
||||
IP: net.IPv4(192, 168, 1, 2),
|
||||
MAC: net.HardwareAddr{0xAB, 0xCD, 0xEF, 0xAB, 0xCD, 0xEF},
|
||||
}, {
|
||||
IP: net.ParseIP("::ffff:ffff"),
|
||||
MAC: net.HardwareAddr{0xEF, 0xCD, 0xAB, 0xEF, 0xCD, 0xAB},
|
||||
}}
|
||||
|
|
@ -3,7 +3,6 @@ package aghnet
|
|||
import (
|
||||
"io/fs"
|
||||
"net"
|
||||
"os"
|
||||
"path"
|
||||
"strings"
|
||||
"sync/atomic"
|
||||
|
|
@ -281,7 +280,6 @@ func TestHostsContainer_PathsToPatterns(t *testing.T) {
|
|||
}
|
||||
|
||||
func TestHostsContainer_Translate(t *testing.T) {
|
||||
testdata := os.DirFS("./testdata")
|
||||
stubWatcher := aghtest.FSWatcher{
|
||||
OnEvents: func() (e <-chan struct{}) { return nil },
|
||||
OnAdd: func(name string) (err error) { return nil },
|
||||
|
|
@ -360,8 +358,6 @@ func TestHostsContainer_Translate(t *testing.T) {
|
|||
func TestHostsContainer(t *testing.T) {
|
||||
const listID = 1234
|
||||
|
||||
testdata := os.DirFS("./testdata")
|
||||
|
||||
testCases := []struct {
|
||||
want []*rules.DNSRewrite
|
||||
name string
|
||||
|
|
|
|||
|
|
@ -1,7 +1,9 @@
|
|||
package aghnet
|
||||
|
||||
import (
|
||||
"io/fs"
|
||||
"net"
|
||||
"os"
|
||||
"testing"
|
||||
|
||||
"github.com/AdguardTeam/AdGuardHome/internal/aghtest"
|
||||
|
|
@ -11,6 +13,9 @@ import (
|
|||
"github.com/stretchr/testify/require"
|
||||
)
|
||||
|
||||
// testdata is the filesystem containing data for testing the package.
|
||||
var testdata fs.FS = os.DirFS("./testdata")
|
||||
|
||||
func TestMain(m *testing.M) {
|
||||
aghtest.DiscardLogOutput(m)
|
||||
}
|
||||
|
|
|
|||
|
|
@ -0,0 +1,4 @@
|
|||
IP address HW type Flags HW address Mask Device
|
||||
192.168.1.2 0x1 0x2 ab:cd:ef:ab:cd:ef * wan
|
||||
::ffff:ffff 0x1 0x0 ef:cd:ab:ef:cd:ab * br-lan
|
||||
0.0.0.0 0x0 0x0 00:00:00:00:00:00 * unspec
|
||||
|
|
@ -52,11 +52,12 @@ func HaveAdminRights() (bool, error) {
|
|||
return haveAdminRights()
|
||||
}
|
||||
|
||||
// MaxCmdOutputSize is the maximum length of performed shell command output.
|
||||
const MaxCmdOutputSize = 2 * 1024
|
||||
// MaxCmdOutputSize is the maximum length of performed shell command output in
|
||||
// bytes.
|
||||
const MaxCmdOutputSize = 64 * 1024
|
||||
|
||||
// RunCommand runs shell command.
|
||||
func RunCommand(command string, arguments ...string) (int, string, error) {
|
||||
func RunCommand(command string, arguments ...string) (code int, output string, err error) {
|
||||
cmd := exec.Command(command, arguments...)
|
||||
out, err := cmd.Output()
|
||||
if len(out) > MaxCmdOutputSize {
|
||||
|
|
@ -66,7 +67,7 @@ func RunCommand(command string, arguments ...string) (int, string, error) {
|
|||
if errors.As(err, new(*exec.ExitError)) {
|
||||
return cmd.ProcessState.ExitCode(), string(out), nil
|
||||
} else if err != nil {
|
||||
return 1, "", fmt.Errorf("exec.Command(%s) failed: %w: %s", command, err, string(out))
|
||||
return 1, "", fmt.Errorf("command %q failed: %w: %s", command, err, out)
|
||||
}
|
||||
|
||||
return cmd.ProcessState.ExitCode(), string(out), nil
|
||||
|
|
|
|||
|
|
@ -4,10 +4,7 @@ import (
|
|||
"bytes"
|
||||
"fmt"
|
||||
"net"
|
||||
"os/exec"
|
||||
"runtime"
|
||||
"sort"
|
||||
"strings"
|
||||
"sync"
|
||||
"time"
|
||||
|
||||
|
|
@ -99,6 +96,9 @@ type clientsContainer struct {
|
|||
// hosts database.
|
||||
etcHosts *aghnet.HostsContainer
|
||||
|
||||
// arpdb stores the neighbors retrieved from ARP.
|
||||
arpdb aghnet.ARPDB
|
||||
|
||||
testing bool // if TRUE, this object is used for internal tests
|
||||
}
|
||||
|
||||
|
|
@ -109,6 +109,7 @@ func (clients *clientsContainer) Init(
|
|||
objects []*clientObject,
|
||||
dhcpServer *dhcpd.Server,
|
||||
etcHosts *aghnet.HostsContainer,
|
||||
arpdb aghnet.ARPDB,
|
||||
) {
|
||||
if clients.list != nil {
|
||||
log.Fatal("clients.list != nil")
|
||||
|
|
@ -121,6 +122,7 @@ func (clients *clientsContainer) Init(
|
|||
|
||||
clients.dhcpServer = dhcpServer
|
||||
clients.etcHosts = etcHosts
|
||||
clients.arpdb = arpdb
|
||||
clients.addFromConfig(objects)
|
||||
|
||||
if clients.testing {
|
||||
|
|
@ -807,16 +809,18 @@ func (clients *clientsContainer) addFromHostsFile(hosts *netutil.IPMap) {
|
|||
// addFromSystemARP adds the IP-hostname pairings from the output of the arp -a
|
||||
// command.
|
||||
func (clients *clientsContainer) addFromSystemARP() {
|
||||
if runtime.GOOS == "windows" {
|
||||
if err := clients.arpdb.Refresh(); err != nil {
|
||||
log.Error("refreshing arp container: %s", err)
|
||||
|
||||
clients.arpdb = aghnet.EmptyARPDB{}
|
||||
|
||||
return
|
||||
}
|
||||
|
||||
cmd := exec.Command("arp", "-a")
|
||||
log.Tracef("executing %q %q", cmd.Path, cmd.Args)
|
||||
data, err := cmd.Output()
|
||||
if err != nil || cmd.ProcessState.ExitCode() != 0 {
|
||||
log.Debug("command %q has failed: %q code:%d",
|
||||
cmd.Path, err, cmd.ProcessState.ExitCode())
|
||||
ns := clients.arpdb.Neighbors()
|
||||
if len(ns) == 0 {
|
||||
log.Debug("refreshing arp container: the update is empty")
|
||||
|
||||
return
|
||||
}
|
||||
|
||||
|
|
@ -825,30 +829,14 @@ func (clients *clientsContainer) addFromSystemARP() {
|
|||
|
||||
clients.rmHostsBySrc(ClientSourceARP)
|
||||
|
||||
n := 0
|
||||
// TODO(a.garipov): Rewrite to use bufio.Scanner.
|
||||
lines := strings.Split(string(data), "\n")
|
||||
for _, ln := range lines {
|
||||
lparen := strings.Index(ln, " (")
|
||||
rparen := strings.Index(ln, ") ")
|
||||
if lparen == -1 || rparen == -1 || lparen >= rparen {
|
||||
continue
|
||||
}
|
||||
|
||||
host := ln[:lparen]
|
||||
ipStr := ln[lparen+2 : rparen]
|
||||
ip := net.ParseIP(ipStr)
|
||||
if netutil.ValidateDomainName(host) != nil || ip == nil {
|
||||
continue
|
||||
}
|
||||
|
||||
ok := clients.addHostLocked(ip, host, ClientSourceARP)
|
||||
if ok {
|
||||
n++
|
||||
added := 0
|
||||
for _, n := range ns {
|
||||
if clients.addHostLocked(n.IP, "", ClientSourceARP) {
|
||||
added++
|
||||
}
|
||||
}
|
||||
|
||||
log.Debug("clients: added %d client aliases from 'arp -a' command output", n)
|
||||
log.Debug("clients: added %d client aliases from arp neighborhood", added)
|
||||
}
|
||||
|
||||
// updateFromDHCP adds the clients that have a non-empty hostname from the DHCP
|
||||
|
|
|
|||
|
|
@ -18,7 +18,7 @@ func TestClients(t *testing.T) {
|
|||
clients := clientsContainer{}
|
||||
clients.testing = true
|
||||
|
||||
clients.Init(nil, nil, nil)
|
||||
clients.Init(nil, nil, nil, nil)
|
||||
|
||||
t.Run("add_success", func(t *testing.T) {
|
||||
c := &Client{
|
||||
|
|
@ -194,7 +194,7 @@ func TestClientsWHOIS(t *testing.T) {
|
|||
clients := clientsContainer{
|
||||
testing: true,
|
||||
}
|
||||
clients.Init(nil, nil, nil)
|
||||
clients.Init(nil, nil, nil, nil)
|
||||
whois := &RuntimeClientWHOISInfo{
|
||||
Country: "AU",
|
||||
Orgname: "Example Org",
|
||||
|
|
@ -253,7 +253,7 @@ func TestClientsAddExisting(t *testing.T) {
|
|||
clients := clientsContainer{
|
||||
testing: true,
|
||||
}
|
||||
clients.Init(nil, nil, nil)
|
||||
clients.Init(nil, nil, nil, nil)
|
||||
|
||||
t.Run("simple", func(t *testing.T) {
|
||||
ip := net.IP{1, 1, 1, 1}
|
||||
|
|
@ -332,7 +332,7 @@ func TestClientsCustomUpstream(t *testing.T) {
|
|||
clients := clientsContainer{
|
||||
testing: true,
|
||||
}
|
||||
clients.Init(nil, nil, nil)
|
||||
clients.Init(nil, nil, nil, nil)
|
||||
|
||||
// Add client with upstreams.
|
||||
ok, err := clients.Add(&Client{
|
||||
|
|
|
|||
|
|
@ -293,7 +293,15 @@ func setupConfig(args options) (err error) {
|
|||
}
|
||||
}
|
||||
|
||||
Context.clients.Init(config.Clients, Context.dhcpServer, Context.etcHosts)
|
||||
var arpdb aghnet.ARPDB
|
||||
arpdb, err = aghnet.NewARPDB()
|
||||
if err != nil {
|
||||
log.Info("warning: creating arpdb: %s; using stub", err)
|
||||
|
||||
arpdb = aghnet.EmptyARPDB{}
|
||||
}
|
||||
|
||||
Context.clients.Init(config.Clients, Context.dhcpServer, Context.etcHosts, arpdb)
|
||||
|
||||
if args.bindPort != 0 {
|
||||
uc := aghalg.UniqChecker{}
|
||||
|
|
|
|||
Loading…
Reference in New Issue