chore: bump deps

vendor/github.com/prometheus/procfs/net_dev_snmp6.go

@@ -0,0 +1,96 @@
+// Copyright 2018 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package procfs
+
+import (
+	"bufio"
+	"errors"
+	"io"
+	"os"
+	"strconv"
+	"strings"
+)
+
+// NetDevSNMP6 is parsed from files in /proc/net/dev_snmp6/ or /proc/<PID>/net/dev_snmp6/.
+// The outer map's keys are interface names and the inner map's keys are stat names.
+//
+// If you'd like a total across all interfaces, please use the Snmp6() method of the Proc type.
+type NetDevSNMP6 map[string]map[string]uint64
+
+// Returns kernel/system statistics read from interface files within the /proc/net/dev_snmp6/
+// directory.
+func (fs FS) NetDevSNMP6() (NetDevSNMP6, error) {
+	return newNetDevSNMP6(fs.proc.Path("net/dev_snmp6"))
+}
+
+// Returns kernel/system statistics read from interface files within the /proc/<PID>/net/dev_snmp6/
+// directory.
+func (p Proc) NetDevSNMP6() (NetDevSNMP6, error) {
+	return newNetDevSNMP6(p.path("net/dev_snmp6"))
+}
+
+// newNetDevSNMP6 creates a new NetDevSNMP6 from the contents of the given directory.
+func newNetDevSNMP6(dir string) (NetDevSNMP6, error) {
+	netDevSNMP6 := make(NetDevSNMP6)
+
+	// The net/dev_snmp6 folders contain one file per interface
+	ifaceFiles, err := os.ReadDir(dir)
+	if err != nil {
+		// On systems with IPv6 disabled, this directory won't exist.
+		// Do nothing.
+		if errors.Is(err, os.ErrNotExist) {
+			return netDevSNMP6, err
+		}
+		return netDevSNMP6, err
+	}
+
+	for _, iFaceFile := range ifaceFiles {
+		f, err := os.Open(dir + "/" + iFaceFile.Name())
+		if err != nil {
+			return netDevSNMP6, err
+		}
+		defer f.Close()
+
+		netDevSNMP6[iFaceFile.Name()], err = parseNetDevSNMP6Stats(f)
+		if err != nil {
+			return netDevSNMP6, err
+		}
+	}
+
+	return netDevSNMP6, nil
+}
+
+func parseNetDevSNMP6Stats(r io.Reader) (map[string]uint64, error) {
+	m := make(map[string]uint64)
+
+	scanner := bufio.NewScanner(r)
+	for scanner.Scan() {
+		stat := strings.Fields(scanner.Text())
+		if len(stat) < 2 {
+			continue
+		}
+		key, val := stat[0], stat[1]
+
+		// Expect stat name to contain "6" or be "ifIndex"
+		if strings.Contains(key, "6") || key == "ifIndex" {
+			v, err := strconv.ParseUint(val, 10, 64)
+			if err != nil {
+				return m, err
+			}
+
+			m[key] = v
+		}
+	}
+	return m, scanner.Err()
+}