Documentation
¶
Overview ¶
Package ipv4 contains the implementation of the ipv4 network protocol.
Index ¶
Constants ¶
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const ( // ReassembleTimeout is the time a packet stays in the reassembly // system before being evicted. // As per RFC 791 section 3.2: // The current recommendation for the initial timer setting is 15 seconds. // This may be changed as experience with this protocol accumulates. // // Considering that it is an old recommendation, we use the same reassembly // timeout that linux defines, which is 30 seconds: // https://github.com/torvalds/linux/blob/47ec5303d73ea344e84f46660fff693c57641386/include/net/ip.h#L138 ReassembleTimeout = 30 * time.Second // ProtocolNumber is the ipv4 protocol number. ProtocolNumber = header.IPv4ProtocolNumber // MaxTotalSize is maximum size that can be encoded in the 16-bit // TotalLength field of the ipv4 header. MaxTotalSize = 0xffff // DefaultTTL is the default time-to-live value for this endpoint. DefaultTTL = 64 )
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const ( // UnsolicitedReportIntervalMax is the maximum delay between sending // unsolicited IGMP reports. // // Obtained from RFC 2236 Section 8.10, Page 19. UnsolicitedReportIntervalMax = 10 * time.Second )
Variables ¶
This section is empty.
Functions ¶
func NewProtocol ¶
func NewProtocol(s *stack.Stack) stack.NetworkProtocol
NewProtocol is equivalent to NewProtocolWithOptions with an empty Options.
func NewProtocolWithOptions ¶
func NewProtocolWithOptions(opts Options) stack.NetworkProtocolFactory
NewProtocolWithOptions returns an IPv4 network protocol.
Types ¶
type IGMPEndpoint ¶
type IGMPEndpoint interface {
// SetIGMPVersion sets the IGMP version.
//
// Returns the previous IGMP version.
SetIGMPVersion(IGMPVersion) IGMPVersion
// GetIGMPVersion returns the IGMP version.
GetIGMPVersion() IGMPVersion
}
IGMPEndpoint is a network endpoint that supports IGMP.
type IGMPOptions ¶
type IGMPOptions struct {
// Enabled indicates whether IGMP will be performed.
//
// When enabled, IGMP may transmit IGMP report and leave messages when
// joining and leaving multicast groups respectively, and handle incoming
// IGMP packets.
//
// This field is ignored and is always assumed to be false for interfaces
// without neighbouring nodes (e.g. loopback).
Enabled bool
}
IGMPOptions holds options for IGMP.
type IGMPVersion ¶
type IGMPVersion int
IGMPVersion is the forced version of IGMP.
const ( // IGMPVersion1 indicates IGMPv1. IGMPVersion1 IGMPVersion // IGMPVersion2 indicates IGMPv2. Note that IGMP may still fallback to V1 // compatibility mode as required by IGMPv2. IGMPVersion2 // IGMPVersion3 indicates IGMPv3. Note that IGMP may still fallback to V2 // compatibility mode as required by IGMPv3. IGMPVersion3 )
type Options ¶
type Options struct {
// IGMP holds options for IGMP.
IGMP IGMPOptions
// AllowExternalLoopbackTraffic indicates that inbound loopback packets (i.e.
// martian loopback packets) should be accepted.
AllowExternalLoopbackTraffic bool
}
Options holds options to configure a new protocol.
type Stats ¶
type Stats struct {
// IP holds IPv4 statistics.
IP tcpip.IPStats
// IGMP holds IGMP statistics.
IGMP tcpip.IGMPStats
// ICMP holds ICMPv4 statistics.
ICMP tcpip.ICMPv4Stats
}
Stats holds statistics related to the IPv4 protocol family.
func (*Stats) IsNetworkEndpointStats ¶
func (*Stats) IsNetworkEndpointStats()
IsNetworkEndpointStats implements stack.NetworkEndpointStats.
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