Router Class Reference

A router that has multiple network interfaces and performs longest-prefix-match routing between them. More...

#include <router.hh>

Public Member Functions
size_t	add_interface (AsyncNetworkInterface &&interface)
void	add_route (const uint32_t route_prefix, const uint8_t prefix_length, const std::optional< Address > next_hop, const size_t interface_num)
	Add a route (a forwarding rule) More...
AsyncNetworkInterface &	interface (const size_t N)
	Access an interface by index. More...
void	route ()
	Route packets between the interfaces. More...

Private Member Functions
void	route_one_datagram (InternetDatagram &dgram)

Private Attributes
std::vector< AsyncNetworkInterface >	_interfaces {}
	The router's collection of network interfaces. More...

Detailed Description

A router that has multiple network interfaces and performs longest-prefix-match routing between them.

Definition at line 43 of file router.hh.

Member Function Documentation

add_interface()

size_t Router::add_interface ( AsyncNetworkInterface &&  interface )

inline

Add an interface to the router

Parameters

[in]

interface

an already-constructed network interface

Returns

The index of the interface after it has been added to the router

Definition at line 56 of file router.hh.

add_route()

void Router::add_route	(	const uint32_t	route_prefix,
		const uint8_t	prefix_length,
		const std::optional< Address >	next_hop,
		const size_t	interface_num
	)

Add a route (a forwarding rule)

Parameters

[in]	route_prefix	The "up-to-32-bit" IPv4 address prefix to match the datagram's destination address against
[in]	prefix_length	For this route to be applicable, how many high-order (most-significant) bits of the route_prefix will need to match the corresponding bits of the datagram's destination address?
[in]	next_hop	The IP address of the next hop. Will be empty if the network is directly attached to the router (in which case, the next hop address should be the datagram's final destination).
[in]	interface_num	The index of the interface to send the datagram out on.

Definition at line 25 of file router.cc.

interface()

AsyncNetworkInterface& Router::interface ( const size_t  N )

inline

Access an interface by index.

Definition at line 62 of file router.hh.

route()

void Router::route

(

)

Route packets between the interfaces.

Definition at line 42 of file router.cc.

route_one_datagram()

void Router::route_one_datagram ( InternetDatagram &  dgram )

private

Send a single datagram from the appropriate outbound interface to the next hop, as specified by the route with the longest prefix_length that matches the datagram's destination address.

Parameters

[in]

dgram

The datagram to be routed

Definition at line 37 of file router.cc.

Member Data Documentation

_interfaces

std::vector<AsyncNetworkInterface> Router::_interfaces {}

private

The router's collection of network interfaces.

Definition at line 45 of file router.hh.

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The documentation for this class was generated from the following files:

• /home/cs144/sponge/libsponge/router.hh
• /home/cs144/sponge/libsponge/router.cc