diff options
Diffstat (limited to 'vendor/github.com/prometheus/procfs/arp.go')
-rw-r--r-- | vendor/github.com/prometheus/procfs/arp.go | 85 |
1 files changed, 0 insertions, 85 deletions
diff --git a/vendor/github.com/prometheus/procfs/arp.go b/vendor/github.com/prometheus/procfs/arp.go deleted file mode 100644 index 916c9182a..000000000 --- a/vendor/github.com/prometheus/procfs/arp.go +++ /dev/null @@ -1,85 +0,0 @@ -// Copyright 2019 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 ( - "fmt" - "io/ioutil" - "net" - "strings" -) - -// ARPEntry contains a single row of the columnar data represented in -// /proc/net/arp. -type ARPEntry struct { - // IP address - IPAddr net.IP - // MAC address - HWAddr net.HardwareAddr - // Name of the device - Device string -} - -// GatherARPEntries retrieves all the ARP entries, parse the relevant columns, -// and then return a slice of ARPEntry's. -func (fs FS) GatherARPEntries() ([]ARPEntry, error) { - data, err := ioutil.ReadFile(fs.proc.Path("net/arp")) - if err != nil { - return nil, fmt.Errorf("error reading arp %s: %s", fs.proc.Path("net/arp"), err) - } - - return parseARPEntries(data) -} - -func parseARPEntries(data []byte) ([]ARPEntry, error) { - lines := strings.Split(string(data), "\n") - entries := make([]ARPEntry, 0) - var err error - const ( - expectedDataWidth = 6 - expectedHeaderWidth = 9 - ) - for _, line := range lines { - columns := strings.Fields(line) - width := len(columns) - - if width == expectedHeaderWidth || width == 0 { - continue - } else if width == expectedDataWidth { - entry, err := parseARPEntry(columns) - if err != nil { - return []ARPEntry{}, fmt.Errorf("failed to parse ARP entry: %s", err) - } - entries = append(entries, entry) - } else { - return []ARPEntry{}, fmt.Errorf("%d columns were detected, but %d were expected", width, expectedDataWidth) - } - - } - - return entries, err -} - -func parseARPEntry(columns []string) (ARPEntry, error) { - ip := net.ParseIP(columns[0]) - mac := net.HardwareAddr(columns[3]) - - entry := ARPEntry{ - IPAddr: ip, - HWAddr: mac, - Device: columns[5], - } - - return entry, nil -} |