| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | package l2topology |
| 4 | |
| 5 | import "strings" |
| 6 | |
| 7 | func canonicalARPProtocol(protocol string) string { |
| 8 | protocol = strings.TrimSpace(strings.ToLower(protocol)) |
| 9 | switch protocol { |
| 10 | case "", "arp": |
| 11 | return "arp" |
| 12 | case "nd": |
| 13 | return "nd" |
| 14 | default: |
| 15 | return "arp" |
| 16 | } |
| 17 | } |
| 18 | |
| 19 | func canonicalAddrType(addrType, ip string) string { |
| 20 | addrType = strings.TrimSpace(strings.ToLower(addrType)) |
| 21 | if ipAddr := parseAddr(ip); ipAddr.IsValid() { |
| 22 | if ipAddr.Is4() { |
| 23 | return "ipv4" |
| 24 | } |
| 25 | return "ipv6" |
| 26 | } |
| 27 | if addrType == "" { |
| 28 | return "" |
| 29 | } |
| 30 | return addrType |
| 31 | } |
| 32 | |
| 33 | func deriveRemoteDeviceID(hostname, chassisID, mgmtIP, fallback string) string { |
| 34 | if host := canonicalHost(hostname); host != "" { |
| 35 | return host |
| 36 | } |
| 37 | if ch := canonicalToken(chassisID); ch != "" { |
| 38 | return "chassis-" + ch |
| 39 | } |
| 40 | if ip := canonicalIP(mgmtIP); ip != "" { |
| 41 | return "ip-" + strings.ReplaceAll(ip, ":", "-") |
| 42 | } |
| 43 | if fb := canonicalHost(fallback); fb != "" { |
| 44 | return fb |
| 45 | } |
| 46 | return "discovered-unknown" |
| 47 | } |
| 48 | |
| 49 | func canonicalHost(v string) string { |
| 50 | v = strings.TrimSpace(strings.ToLower(v)) |
| 51 | v = strings.TrimSuffix(v, ".") |
| 52 | return v |
| 53 | } |
| 54 | |
| 55 | func canonicalToken(v string) string { |
| 56 | v = strings.TrimSpace(strings.ToLower(v)) |
| 57 | v = strings.TrimPrefix(v, "0x") |
| 58 | v = strings.ReplaceAll(v, ":", "") |
| 59 | v = strings.ReplaceAll(v, "-", "") |
| 60 | v = strings.ReplaceAll(v, ".", "") |
| 61 | v = strings.ReplaceAll(v, " ", "") |
| 62 | return v |
| 63 | } |