95 lines
4.7 KiB
Go
95 lines
4.7 KiB
Go
package netsplit
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import (
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`io/fs`
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`net/netip`
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`sync`
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`github.com/go-resty/resty/v2`
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)
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const (
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cachedirEnvName string = "SBNTR_RSVCACHE_DIR"
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// https://www.iana.org/assignments/iana-ipv4-special-registry/iana-ipv4-special-registry.xhtml
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ianaSpecial4 string = "https://www.iana.org/assignments/iana-ipv4-special-registry/iana-ipv4-special-registry.xml"
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// https://www.iana.org/assignments/iana-ipv6-special-registry/iana-ipv6-special-registry.xhtml
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ianaSpecial6 string = "https://www.iana.org/assignments/iana-ipv6-special-registry/iana-ipv6-special-registry.xml"
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ianaDateTfmt string = "2006-01-02"
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ianaMonthTfmt string = "2006-01"
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ianaTrue string = "True"
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ianaFalse string = "False"
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ianaNA string = "N/A"
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ianaSpecial4Cache string = "iana_reserved_4.json"
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ianaSpecial6Cache string = "iana_reserved_6.json"
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cacheDirPerms fs.FileMode = 0o0750
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cacheFilePerms fs.FileMode = 0o0640
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)
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var (
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cacheDir string
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isCaching bool
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ianaReserved4 *IANARegistry
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ianaReserved6 *IANARegistry
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)
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var (
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// TODO
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cacheLock sync.RWMutex
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cacheClient *resty.Client
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// IPv4: https://www.iana.org/assignments/iana-ipv4-special-registry/iana-ipv4-special-registry.xhtml#iana-ipv4-special-registry-1
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// IPv6: https://www.iana.org/assignments/iana-ipv6-special-registry/iana-ipv6-special-registry.xhtml
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reservedNets map[netip.Prefix]*IANAAddrNetResRecord
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// Up to date as of Feb 2, 2025
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reservedNetsOrig map[string]string = map[string]string{
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// IPv6: https://www.iana.org/assignments/iana-ipv6-special-registry/iana-ipv6-special-registry.xhtml
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"::/128": "Unspecified Address (RFC 4291 § 2.5.2)",
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"::1/128": "Loopback Address (RFC 4291 § 2.5.3)",
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"ff00::/8": "Multicast (RFC 4291 § 2.7)",
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"::ffff:0:0/96": "IPv4-mapped Address (RFC 4291 § 2.5.5)",
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"64:ff9b::/96": "IPv4-IPv6 Translation (RFC 6052)",
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"64:ff9b:1::/48": "IPv4-IPv6 Translation (RFC 8215)",
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"100::/64": "Discard-Only Address Block (RFC 6666)",
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"2001::/23": "IETF Protocol Assignments (RFC 2928, IANA IPv6 Special Registry)",
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"2001::/32": "TEREDO (RFC 4380)",
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"2001:1::1/128": "Port Control Protocol Anycast (RFC 7723)",
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"2001:1::2/128": "Traversal Using Relays around NAT Anycast (RFC 8155)",
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"2001:1::3/128": "DNS-SD Service Registration Protocol Anycast (draft-ietf-dnssd-srp-25)",
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"2001:2::/48": "Benchmarking (RFC 5180, Errata 1752)",
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"2001:3::/32": "AMT (RFC 7450)",
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"2001:4:112::/48": "AS112-v6 (RFC 7535)",
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"2001:20::/28": "ORCHIDv2 (RFC 7343)",
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"2001:30::/28": "Drone Remote ID Protocol Entity Tags (DETs) Prefix (RFC 9374)",
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"2001:db8::/32": "Documentation (RFC 3849)",
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"2002::/16": "6to4 (RFC 3056)",
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"2620:4f:8000::/48": "Direct Delegation AS112 Service (RFC 7534)",
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"3fff::/20": "Documentation (RFC 9637)",
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"5f00::/16": "Segment Routing (SRv6) SIDs (RFC 9602)",
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"fc00::/7": "Unique-Local Addressing (RFC 4193)", // private/LAN
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"fe80::/10": "Link-Local Unicast (RFC 4291 § 2.5.6)",
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// IPv4: https://www.iana.org/assignments/iana-ipv4-special-registry/iana-ipv4-special-registry.xhtml#iana-ipv4-special-registry-1
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"0.0.0.0/8": "\"This Network\" (RFC 791 § 3.2)",
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"0.0.0.0/32": "\"This Host on This Network\" (RFC 1122 § 3.2.1.3)",
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"10.0.0.0/8": "Private Use (RFC 1918)", // private/LAN
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"100.64.0.0/10": "Shared Address Space (CGNAT) (RFC 6598)",
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"127.0.0.0/8": "Loopback (RFC 1122 § 3.2.1.3)",
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"169.254.0.0/16": "Link-Local (RFC 3927)",
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"172.16.0.0/12": "Private Use (RFC 1918)", // private/LAN
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"192.0.0.0/24": "IETF Protocol Assignments (RFC 6890 § 2.1)",
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"192.0.0.0/29": "IPv4 Service Community Prefix (RFC 7335)",
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"192.0.0.8/32": "IPv4 Dummy Address (RFC 7600)",
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"192.0.0.9/32": "Port Control Protocol Anycast (RFC 7723)",
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"192.0.0.10/32": "Traversal Using Relays Around NAT Anycast (RFC 8155)",
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"192.0.0.170/32": "NAT64/DNS64 Discovery (RFC 7050 § 2.2) (RFC 8880)",
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"192.0.0.171/32": "NAT64/DNS64 Discovery (RFC 7050 § 2.2) (RFC 8880)",
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"192.0.2.0/24": "Documentation (TEST-NET-1) (RFC 5737)",
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"192.31.196.0/24": "AS112-v4 (RFC 7535)",
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"192.52.193.0/24": "AMT (RFC 7450)",
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"192.168.0.0/16": "Private Use (RFC 1918)", // private/LAN
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"192.175.48.0/24": "Direct Delegation AS112 Service (RFC 7534)",
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"198.18.0.0/15": "Benchmarking (RFC 2544)",
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"198.51.100.0/24": "Documentation (TEST-NET-2) (RFC 5737)",
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"240.0.0.0/24": "Reserved for Future Use (RFC 1112 § 4)",
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"255.255.255.255/32": "Limited Broadcast (RFC 919 § 7) (RFC 8190)",
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}
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)
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