mirror of
https://github.com/kernelkit/infix.git
synced 2026-07-29 20:23:01 +02:00
Joachim Wiberg
6aed1f7df4
Add support for static ARP (IPv4) and neighbor cache (IPv6) entries per interface. Static entries are installed as permanent kernel neighbor table entries that are never evicted by normal ARP/NDP aging. Fixes #819 Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
116 lines
2.7 KiB
Python
116 lines
2.7 KiB
Python
import ipaddress
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from ..host import HOST
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from . import common
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def neigh_state(states):
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xlate = {
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"REACHABLE": "reachable",
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"STALE": "stale",
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"DELAY": "delay",
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"PROBE": "probe",
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"INCOMPLETE": "incomplete",
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}
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return next((xlate[s] for s in states if s in xlate), None)
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def neighbors(ifname, family):
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result = []
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for entry in common.ipneighs().get(ifname, []):
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dst = entry.get("dst", "")
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try:
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version = ipaddress.ip_address(dst).version
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except ValueError:
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continue
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if version != (4 if family == "inet" else 6):
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continue
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lladdr = entry.get("lladdr")
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states = entry.get("state", [])
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if not lladdr:
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continue
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origin = "static" if "PERMANENT" in states else "dynamic"
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neigh = {
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"ip": dst,
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"link-layer-address": lladdr,
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"origin": origin,
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}
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if family == "inet6":
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if state := neigh_state(states):
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neigh["state"] = state
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if entry.get("router"):
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neigh["is-router"] = [None]
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result.append(neigh)
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return result
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def inet2yang_origin(inet):
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"""Translate kernel IP address origin to YANG"""
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xlate = {
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"kernel_ll": "link-layer",
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"kernel_ra": "link-layer",
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"static": "static",
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"dhcp": "dhcp",
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"random": "random",
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}
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proto = inet.get("protocol")
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if proto in ("kernel_ll", "kernel_ra"):
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if "stable-privacy" in inet:
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return "random"
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return xlate.get(proto, "other")
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def addresses(ipaddr, proto):
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addrs = []
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for inet in ipaddr.get("addr_info", []):
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if inet.get("family") != proto:
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continue
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addrs.append({
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"ip": inet.get("local"),
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"prefix-length": inet.get("prefixlen"),
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"origin": inet2yang_origin(inet),
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})
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return addrs
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def ipv4(ipaddr):
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ipv4 = {}
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ifname = ipaddr.get("ifname")
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mtu = ipaddr.get("mtu")
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if mtu and ifname != "lo":
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ipv4["mtu"] = mtu
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if addrs := addresses(ipaddr, "inet"):
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ipv4["address"] = addrs
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if neighs := neighbors(ifname, "inet"):
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ipv4["neighbor"] = neighs
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return ipv4
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def ipv6(ipaddr):
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ipv6 = {}
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ifname = ipaddr.get("ifname")
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if mtu := HOST.read(f"/proc/sys/net/ipv6/conf/{ifname}/mtu"):
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ipv6["mtu"] = int(mtu.strip())
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if addrs := addresses(ipaddr, "inet6"):
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ipv6["address"] = addrs
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if neighs := neighbors(ifname, "inet6"):
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ipv6["neighbor"] = neighs
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return ipv6
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