abrown38andClaude Opus 5.5
34292eeebb
Zones, address sets (IPv4 and IPv6 mixed, dynamic sets with timeouts) and services, ordered rules in the early, input, forward and output chains, port forwards with hairpin NAT and IPv6 pinholes, source NAT, redirects, and switchable built-ins (loopback, conntrack, ICMPv6, antispoofing, MSS clamping, DHCPv6 client, flowtable). Every change is validated, checked with nft -c and applied in one transaction to Housecarl's own table, inet housecarl; changes made over the network roll back unless confirmed, and the confirmed ruleset is loaded at boot by housecarl-ruleset.service. An empty configuration applies nothing. Also: hit counters and the drop log (nflog), 'hc import' of an existing nftables ruleset and 'hc takeover', the hc CLI, the REST API and the web UI, users, scoped tokens (sets:write:NAME), the audit log, the web UI's certificate through Jarl, Debian packages, docs, unit tests with real nft 1.1.3, and an e2e test with real traffic (71 checks). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
80 lines
1.7 KiB
Go
80 lines
1.7 KiB
Go
// Package hostif reads the machine's network interfaces: their IPv4 and
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// IPv6 addresses and whether they are up. Results are cached for a few
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// seconds, since validation and the status page ask often.
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package hostif
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import (
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"net"
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"net/netip"
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"sync"
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"time"
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)
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// Host reads this machine's interfaces.
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type Host struct {
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mu sync.Mutex
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at time.Time
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addrs map[string][]netip.Prefix
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up map[string]bool
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err error
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}
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func (h *Host) refresh() {
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if time.Since(h.at) < 5*time.Second && (h.addrs != nil || h.err != nil) {
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return
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}
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h.at = time.Now()
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ifs, err := net.Interfaces()
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if err != nil {
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h.addrs, h.up, h.err = nil, nil, err
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return
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}
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addrs, up := map[string][]netip.Prefix{}, map[string]bool{}
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for _, i := range ifs {
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var ps []netip.Prefix
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as, _ := i.Addrs()
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for _, a := range as {
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if n, ok := a.(*net.IPNet); ok {
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if ip, ok := netip.AddrFromSlice(n.IP); ok {
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bits, _ := n.Mask.Size()
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ps = append(ps, netip.PrefixFrom(ip.Unmap(), bits))
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}
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}
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}
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addrs[i.Name] = ps
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up[i.Name] = i.Flags&net.FlagUp != 0
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}
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h.addrs, h.up, h.err = addrs, up, nil
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}
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// All returns every interface with its addresses.
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func (h *Host) All() (map[string][]netip.Prefix, error) {
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h.mu.Lock()
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defer h.mu.Unlock()
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h.refresh()
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return h.addrs, h.err
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}
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// Up reports whether an interface is up.
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func (h *Host) Up(name string) bool {
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h.mu.Lock()
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defer h.mu.Unlock()
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h.refresh()
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return h.up[name]
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}
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// Exists returns the set of interface names (nil if they can't be read).
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func (h *Host) Exists() map[string]bool {
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h.mu.Lock()
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defer h.mu.Unlock()
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h.refresh()
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if h.err != nil {
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return nil
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}
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out := make(map[string]bool, len(h.addrs))
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for n := range h.addrs {
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out[n] = true
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}
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return out
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}
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