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Validate IGMP packets

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This change also adds support for Router Alert option processing on
incoming packets, a new stat for Router Alert option, and exports
all the IP-option related stats.

Fixes #5491

PiperOrigin-RevId: 358238123
This commit is contained in:
Arthur Sfez
2021-02-18 12:29:54 -08:00
committed by gVisor bot
parent 26eada5dea
commit 2a2cb29e1c
9 changed files with 404 additions and 106 deletions
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pkg/sentry/socket/netstack/netstack.go
+4
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@@ -184,6 +184,10 @@ var Metrics = tcpip.Stats{
IPTablesPreroutingDropped: mustCreateMetric("/netstack/ip/iptables/prerouting_dropped", "Total number of IP packets dropped in the Prerouting chain."),
IPTablesInputDropped: mustCreateMetric("/netstack/ip/iptables/input_dropped", "Total number of IP packets dropped in the Input chain."),
IPTablesOutputDropped: mustCreateMetric("/netstack/ip/iptables/output_dropped", "Total number of IP packets dropped in the Output chain."),
OptionTimestampReceived: mustCreateMetric("/netstack/ip/options/timestamp_received", "Total number of timestamp options found in received IP packets."),
OptionRecordRouteReceived: mustCreateMetric("/netstack/ip/options/record_route_received", "Total number of record route options found in received IP packets."),
OptionRouterAlertReceived: mustCreateMetric("/netstack/ip/options/router_alert_received", "Total number of router alert options found in received IP packets."),
OptionUnknownReceived: mustCreateMetric("/netstack/ip/options/unknown_received", "Total number of unknown options found in received IP packets."),
},
ARP: tcpip.ARPStats{
PacketsReceived: mustCreateMetric("/netstack/arp/packets_received", "Number of ARP packets received from the link layer."),