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introduce a function to distinguish between IPv4 and IPv6 addresses

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This commit is contained in:
Marten Seemann
2020-08-10 16:50:58 +07:00
parent fa4f0a9e7a
commit 876ab1d531
5 changed files with 40 additions and 19 deletions
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11
metrics/metrics.go
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@@ -6,6 +6,8 @@ import (
"net"
"time"
"github.com/lucas-clemente/quic-go/internal/utils"
"github.com/lucas-clemente/quic-go/internal/protocol"
"github.com/lucas-clemente/quic-go/logging"
@@ -118,13 +120,10 @@ func (t *connTracer) StartedConnection(local, _ net.Addr, _ logging.VersionNumbe
var ipVersionTag tag.Mutator
if udpAddr, ok := local.(*net.UDPAddr); ok {
// If ip is not an IPv4 address, To4 returns nil.
// Note that there might be some corner cases, where this is not correct.
// See https://stackoverflow.com/questions/22751035/golang-distinguish-ipv4-ipv6.
if udpAddr.IP.To4() == nil {
ipVersionTag = tag.Upsert(keyIPVersion, "IPv6")
} else {
if utils.IsIPv4(udpAddr.IP) {
ipVersionTag = tag.Upsert(keyIPVersion, "IPv4")
} else {
ipVersionTag = tag.Upsert(keyIPVersion, "IPv6")
}
} else {
ipVersionTag = tag.Upsert(keyIPVersion, "unknown")