mirror of
https://github.com/ceph/ceph-csi.git
synced 2025-03-09 08:59:30 +00:00
f87d06ed85
Several packages are only used while running the e2e suite. These packages are less important to update, as the they can not influence the final executable that is part of the Ceph-CSI container-image. By moving these dependencies out of the main Ceph-CSI go.mod, it is easier to identify if a reported CVE affects Ceph-CSI, or only the testing (like most of the Kubernetes CVEs). Signed-off-by: Niels de Vos <ndevos@ibm.com>
117 lines
2.9 KiB
Go
117 lines
2.9 KiB
Go
// Copyright 2019 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package procfs
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import (
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"fmt"
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"net"
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"os"
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"strconv"
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"strings"
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)
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// Learned from include/uapi/linux/if_arp.h.
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const (
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// completed entry (ha valid).
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ATFComplete = 0x02
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// permanent entry.
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ATFPermanent = 0x04
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// Publish entry.
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ATFPublish = 0x08
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// Has requested trailers.
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ATFUseTrailers = 0x10
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// Obsoleted: Want to use a netmask (only for proxy entries).
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ATFNetmask = 0x20
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// Don't answer this addresses.
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ATFDontPublish = 0x40
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)
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// ARPEntry contains a single row of the columnar data represented in
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// /proc/net/arp.
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type ARPEntry struct {
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// IP address
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IPAddr net.IP
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// MAC address
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HWAddr net.HardwareAddr
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// Name of the device
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Device string
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// Flags
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Flags byte
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}
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// GatherARPEntries retrieves all the ARP entries, parse the relevant columns,
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// and then return a slice of ARPEntry's.
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func (fs FS) GatherARPEntries() ([]ARPEntry, error) {
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data, err := os.ReadFile(fs.proc.Path("net/arp"))
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if err != nil {
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return nil, fmt.Errorf("%w: error reading arp %s: %w", ErrFileRead, fs.proc.Path("net/arp"), err)
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}
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return parseARPEntries(data)
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}
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func parseARPEntries(data []byte) ([]ARPEntry, error) {
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lines := strings.Split(string(data), "\n")
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entries := make([]ARPEntry, 0)
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var err error
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const (
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expectedDataWidth = 6
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expectedHeaderWidth = 9
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)
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for _, line := range lines {
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columns := strings.Fields(line)
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width := len(columns)
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if width == expectedHeaderWidth || width == 0 {
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continue
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} else if width == expectedDataWidth {
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entry, err := parseARPEntry(columns)
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if err != nil {
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return []ARPEntry{}, fmt.Errorf("%w: Failed to parse ARP entry: %v: %w", ErrFileParse, entry, err)
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}
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entries = append(entries, entry)
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} else {
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return []ARPEntry{}, fmt.Errorf("%w: %d columns found, but expected %d: %w", ErrFileParse, width, expectedDataWidth, err)
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}
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}
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return entries, err
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}
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func parseARPEntry(columns []string) (ARPEntry, error) {
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entry := ARPEntry{Device: columns[5]}
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ip := net.ParseIP(columns[0])
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entry.IPAddr = ip
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if mac, err := net.ParseMAC(columns[3]); err == nil {
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entry.HWAddr = mac
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} else {
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return ARPEntry{}, err
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}
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if flags, err := strconv.ParseUint(columns[2], 0, 8); err == nil {
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entry.Flags = byte(flags)
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} else {
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return ARPEntry{}, err
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}
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return entry, nil
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}
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// IsComplete returns true if ARP entry is marked with complete flag.
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func (entry *ARPEntry) IsComplete() bool {
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return entry.Flags&ATFComplete != 0
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}
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