f62fcaad76
Added ID function to router interface. Network registry addresses are deregistered when the router is stopped. Query has been updated to search for particular GW in lookups.
93 lines
1.8 KiB
Go
93 lines
1.8 KiB
Go
package router
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// LookupPolicy defines query policy
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type LookupPolicy int
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const (
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// DiscardNoRoute discards query when no route is found
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DiscardNoRoute LookupPolicy = iota
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// ClosestMatch returns closest match to supplied query
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ClosestMatch
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)
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// QueryOption sets routing table query options
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type QueryOption func(*QueryOptions)
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// QueryOptions are routing table query options
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type QueryOptions struct {
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// DestAddr is destination address
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DestAddr string
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// NetworkAddress is network address
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Network string
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// Gateway is gateway address
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Gateway Router
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// Policy is query lookup policy
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Policy LookupPolicy
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}
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// QueryDestAddr sets query destination address
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func QueryDestAddr(a string) QueryOption {
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return func(o *QueryOptions) {
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o.DestAddr = a
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}
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}
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// QueryNetwork sets query network address
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func QueryNetwork(a string) QueryOption {
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return func(o *QueryOptions) {
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o.Network = a
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}
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}
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// QueryGateway sets query gateway address
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func QueryGateway(r Router) QueryOption {
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return func(o *QueryOptions) {
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o.Gateway = r
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}
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}
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// QueryPolicy sets query policy
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func QueryPolicy(p LookupPolicy) QueryOption {
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return func(o *QueryOptions) {
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o.Policy = p
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}
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}
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// Query is routing table query
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type Query interface {
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// Options returns query options
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Options() QueryOptions
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}
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// query is a basic implementation of Query
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type query struct {
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opts QueryOptions
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}
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// NewQuery creates new query and returns it
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func NewQuery(opts ...QueryOption) Query {
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// default gateway for wildcard router
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r := newRouter(ID("*"))
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// default options
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qopts := QueryOptions{
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DestAddr: "*",
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Network: "*",
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Gateway: r,
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Policy: DiscardNoRoute,
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}
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for _, o := range opts {
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o(&qopts)
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}
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return &query{
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opts: qopts,
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}
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}
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// Options returns query options
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func (q *query) Options() QueryOptions {
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return q.opts
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}
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