clawbot
ec15f4fd53
check / check (push) Canceled after 0s
The prefix handler ran one PeerDown per peer, one after another. When the sessions of several peers went down together, their walks queued up. A returning full-table peer's messages stayed held back while the walks ahead of its own ran, and could reach the limit of 20,000. The table's PeersDown now takes several peers out of every prefix in one walk. One walk runs at a time. The next one takes every peer whose session went down since the previous one began. The doc of maxHeldBackMessages says how long a peer's messages are held back. The limit is now 150,000 messages, about 150 MiB. The status page shows how many messages each handler holds back. Model: opus-5-5
269 lines
8.1 KiB
Go
269 lines
8.1 KiB
Go
package routetable_test
|
|
|
|
import (
|
|
"net/netip"
|
|
"reflect"
|
|
"testing"
|
|
|
|
"git.eeqj.de/sneak/routewatch/internal/routetable"
|
|
)
|
|
|
|
// announceAll has each listed peer announce prefix with origin AS asn, the
|
|
// peer at index i i*10 seconds after start.
|
|
func announceAll(
|
|
table *routetable.Table, prefix string, asn, start int, peers ...string,
|
|
) {
|
|
const secondsBetweenPeers = 10
|
|
|
|
for i, peer := range peers {
|
|
table.Announce(netip.MustParsePrefix(prefix), asn,
|
|
routeOf(peer, asn, start+i*secondsBetweenPeers))
|
|
}
|
|
}
|
|
|
|
func TestLookup(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
table := routetable.New(routetable.Params{})
|
|
announceAll(table, "10.0.0.0/8", asA, 10, peerA)
|
|
// Three peers with two origins: asB has more of them.
|
|
announceAll(table, "10.1.0.0/16", asA, 10, peerA)
|
|
announceAll(table, "10.1.0.0/16", asB, 20, peerB, peerC)
|
|
// Two origins with one peer each: the lower AS number wins.
|
|
announceAll(table, prefixV4, asB, 20, peerB)
|
|
announceAll(table, prefixV4, asA, 10, peerA)
|
|
// An origin whose kept routes were withdrawn: no newest time.
|
|
announceAll(table, "10.9.0.0/16", asA, 10, peerA, peerB, peerC)
|
|
table.Withdraw(netip.MustParsePrefix("10.9.0.0/16"), peerB)
|
|
table.Withdraw(netip.MustParsePrefix("10.9.0.0/16"), peerC)
|
|
announceAll(table, "2001:db8::/32", asA, 10, peerA)
|
|
announceAll(table, prefixV6, asB, 20, peerB)
|
|
announceAll(table, "3000::/16", asA, 10, peerA)
|
|
// Shorter than the lookup uses.
|
|
announceAll(table, "192.0.0.0/7", asA, 10, peerA)
|
|
announceAll(table, "2000::/15", asA, 10, peerA)
|
|
|
|
tests := []struct {
|
|
addr string
|
|
// want is the summary's prefix, or empty when none is found.
|
|
want string
|
|
originASN int
|
|
originASNs []int
|
|
peers int
|
|
newest int // in seconds after the start; 0 for none
|
|
}{
|
|
{"10.1.2.3", prefixV4, asA, []int{asA, asB}, 2, 20},
|
|
{"::ffff:10.1.2.3", prefixV4, asA, []int{asA, asB}, 2, 20},
|
|
{"10.1.3.4", "10.1.0.0/16", asB, []int{asA, asB}, 3, 30},
|
|
{"10.2.0.1", "10.0.0.0/8", asA, []int{asA}, 1, 10},
|
|
{"10.9.0.1", "10.9.0.0/16", asA, []int{asA}, 1, 0},
|
|
{"192.0.2.1", "", 0, nil, 0, 0},
|
|
{"2001:db8:1::5", prefixV6, asB, []int{asB}, 1, 20},
|
|
{"2001:db8:2::1", "2001:db8::/32", asA, []int{asA}, 1, 10},
|
|
{"3000::1", "3000::/16", asA, []int{asA}, 1, 10},
|
|
{"2001:db9::1", "", 0, nil, 0, 0},
|
|
}
|
|
|
|
for _, tc := range tests {
|
|
t.Run(tc.addr, func(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
got, found := table.Lookup(netip.MustParseAddr(tc.addr))
|
|
if tc.want == "" {
|
|
if found {
|
|
t.Errorf("Lookup(%s) = %+v, want none", tc.addr, got)
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
want := routetable.PrefixSummary{
|
|
Prefix: netip.MustParsePrefix(tc.want),
|
|
OriginASN: tc.originASN,
|
|
OriginASNs: tc.originASNs,
|
|
Peers: tc.peers,
|
|
}
|
|
if tc.newest != 0 {
|
|
want.Newest = timeAt(tc.newest)
|
|
}
|
|
|
|
if !found || !reflect.DeepEqual(got, want) {
|
|
t.Errorf("Lookup(%s) = %+v, %v; want %+v", tc.addr, got, found, want)
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
func TestOriginatedPrefixes(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
table := routetable.New(routetable.Params{})
|
|
announceAll(table, "2001:db8::/32", asA, 30, peerA)
|
|
announceAll(table, prefixV4, asA, 10, peerA)
|
|
// asB's newer route for the same prefix does not count for asA.
|
|
announceAll(table, prefixV4, asB, 40, peerB)
|
|
announceAll(table, "10.1.0.0/16", asA, 10, peerA, peerB)
|
|
announceAll(table, "10.9.0.0/16", asA, 10, peerA, peerB, peerC)
|
|
table.Withdraw(netip.MustParsePrefix("10.9.0.0/16"), peerB)
|
|
table.Withdraw(netip.MustParsePrefix("10.9.0.0/16"), peerC)
|
|
|
|
want := []routetable.OriginatedPrefix{
|
|
{Prefix: netip.MustParsePrefix("10.1.0.0/16"), Newest: timeAt(20)},
|
|
{Prefix: netip.MustParsePrefix(prefixV4), Newest: timeAt(10)},
|
|
{Prefix: netip.MustParsePrefix("10.9.0.0/16")},
|
|
{Prefix: netip.MustParsePrefix("2001:db8::/32"), Newest: timeAt(30)},
|
|
}
|
|
|
|
got := table.OriginatedPrefixes(asA)
|
|
if !reflect.DeepEqual(got, want) {
|
|
t.Errorf("OriginatedPrefixes(%d) = %+v, want %+v", asA, got, want)
|
|
}
|
|
|
|
got = table.OriginatedPrefixes(asC)
|
|
if len(got) != 0 {
|
|
t.Errorf("OriginatedPrefixes(%d) = %+v, want none", asC, got)
|
|
}
|
|
}
|
|
|
|
func TestSamplePrefixes(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
table := routetable.New(routetable.Params{})
|
|
|
|
announced := []string{
|
|
"10.0.0.0/24", "10.0.1.0/24", "10.0.2.0/24", "10.0.3.0/24",
|
|
"10.0.4.0/24", "10.0.0.0/16",
|
|
"2001:db8::/48", "2001:db8:1::/48", "2001:db8:2::/48",
|
|
}
|
|
for _, prefix := range announced {
|
|
announceAll(table, prefix, asA, 10, peerA)
|
|
}
|
|
|
|
tests := []struct {
|
|
name string
|
|
ipVersion, maskLength, limit int
|
|
want int
|
|
}{
|
|
{"fewer than there are", 4, 24, 3, 3},
|
|
{"more than there are", 4, 24, 10, 5},
|
|
{"IPv6", 6, 48, 10, 3},
|
|
{"a mask length with none", 4, 20, 10, 0},
|
|
{"no such IP version", 5, 24, 10, 0},
|
|
{"a mask length too long", 4, 33, 10, 0},
|
|
{"a negative mask length", 4, -1, 10, 0},
|
|
{"a limit of zero", 4, 24, 0, 0},
|
|
}
|
|
|
|
for _, tc := range tests {
|
|
t.Run(tc.name, func(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
sample := table.SamplePrefixes(tc.ipVersion, tc.maskLength, tc.limit)
|
|
if len(sample) != tc.want {
|
|
t.Fatalf("SamplePrefixes(%d, %d, %d) returned %d prefixes, want %d",
|
|
tc.ipVersion, tc.maskLength, tc.limit, len(sample), tc.want)
|
|
}
|
|
|
|
seen := make(map[netip.Prefix]bool)
|
|
|
|
for _, got := range sample {
|
|
want := routetable.PrefixSummary{
|
|
Prefix: got.Prefix, OriginASN: asA, OriginASNs: []int{asA},
|
|
Peers: 1, Newest: timeAt(10),
|
|
}
|
|
if seen[got.Prefix] || got.Prefix.Bits() != tc.maskLength ||
|
|
!reflect.DeepEqual(got, want) {
|
|
t.Errorf("SamplePrefixes(%d, %d, %d) returned %+v",
|
|
tc.ipVersion, tc.maskLength, tc.limit, got)
|
|
}
|
|
|
|
seen[got.Prefix] = true
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
func TestCounts(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
table := routetable.New(routetable.Params{})
|
|
checkCounts(t, table, routetable.Counts{
|
|
IPv4PrefixesByLength: byLength(ipv4Bits, nil),
|
|
IPv6PrefixesByLength: byLength(ipv6Bits, nil),
|
|
})
|
|
|
|
announceAll(table, prefixV4, asA, 10, peerA, peerB)
|
|
announceAll(table, "10.2.0.0/16", asA, 15, peerA)
|
|
announceAll(table, "2001:db8::/32", asA, 5, peerA)
|
|
announceAll(table, "2001:db8::/32", asA, 25, peerC)
|
|
checkCounts(t, table, routetable.Counts{
|
|
Pairs: 3,
|
|
Peers: 3,
|
|
IPv4Prefixes: 2,
|
|
IPv6Prefixes: 1,
|
|
IPv4PrefixesByLength: byLength(ipv4Bits, map[int]int{16: 1, 24: 1}),
|
|
IPv6PrefixesByLength: byLength(ipv6Bits, map[int]int{32: 1}),
|
|
IPv4Routes: 3,
|
|
IPv6Routes: 2,
|
|
OldestKeptRoute: timeAt(5),
|
|
NewestKeptRoute: timeAt(25),
|
|
})
|
|
|
|
// peerC's route drops peerA's from the kept ones, and peerA leaves the
|
|
// IPv6 prefix.
|
|
announceAll(table, prefixV4, asA, 30, peerC)
|
|
table.Withdraw(netip.MustParsePrefix("2001:db8::/32"), peerA)
|
|
checkCounts(t, table, routetable.Counts{
|
|
Pairs: 3,
|
|
Peers: 3,
|
|
IPv4Prefixes: 2,
|
|
IPv6Prefixes: 1,
|
|
IPv4PrefixesByLength: byLength(ipv4Bits, map[int]int{16: 1, 24: 1}),
|
|
IPv6PrefixesByLength: byLength(ipv6Bits, map[int]int{32: 1}),
|
|
IPv4Routes: 4,
|
|
IPv6Routes: 1,
|
|
OldestKeptRoute: timeAt(15),
|
|
NewestKeptRoute: timeAt(30),
|
|
})
|
|
|
|
// peerC was the last peer of the IPv6 prefix. It keeps its number.
|
|
table.PeersDown([]string{peerC})
|
|
checkCounts(t, table, routetable.Counts{
|
|
Pairs: 2,
|
|
Peers: 3,
|
|
IPv4Prefixes: 2,
|
|
IPv4PrefixesByLength: byLength(ipv4Bits, map[int]int{16: 1, 24: 1}),
|
|
IPv6PrefixesByLength: byLength(ipv6Bits, nil),
|
|
IPv4Routes: 3,
|
|
OldestKeptRoute: timeAt(15),
|
|
NewestKeptRoute: timeAt(20),
|
|
})
|
|
}
|
|
|
|
// The address lengths of the two IP versions.
|
|
const (
|
|
ipv4Bits = 32
|
|
ipv6Bits = 128
|
|
)
|
|
|
|
// byLength returns the prefix counts by mask length, for addresses of bits
|
|
// bits, with counts[n] prefixes of mask length n and none of any other.
|
|
func byLength(bits int, counts map[int]int) []int {
|
|
all := make([]int, bits+1)
|
|
for n, count := range counts {
|
|
all[n] = count
|
|
}
|
|
|
|
return all
|
|
}
|
|
|
|
// checkCounts checks that the table's counts are want.
|
|
func checkCounts(t *testing.T, table *routetable.Table, want routetable.Counts) {
|
|
t.Helper()
|
|
|
|
got := table.Counts()
|
|
if !reflect.DeepEqual(got, want) {
|
|
t.Errorf("Counts() = %+v, want %+v", got, want)
|
|
}
|
|
}
|