9d7420658d
* Changed router interface to return Advertisement channel * Added default gateway route to the routing table if supplied * Watch table for updates and advertise to the network * We hash the routes on 3-tuple (Destination, Gateway, Network)
82 lines
1.7 KiB
Go
82 lines
1.7 KiB
Go
package router
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import (
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"fmt"
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"strings"
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"github.com/olekukonko/tablewriter"
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)
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var (
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// DefaultLocalMetric is default route cost for local network
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DefaultLocalMetric = 1
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// DefaultNetworkMetric is default route cost for micro network
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DefaultNetworkMetric = 10
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)
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// RoutePolicy defines routing table addition policy
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type RoutePolicy int
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const (
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// OverrideIfExists overrides route if it already exists
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OverrideIfExists RoutePolicy = iota
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// AddIfNotExist adds the route if it does not exist
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AddIfNotExists
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// IgnoreIfExists instructs to not modify existing route
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IgnoreIfExists
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)
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// String returns human reprensentation of policy
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func (p RoutePolicy) String() string {
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switch p {
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case OverrideIfExists:
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return "OVERRIDE_IF_EXISTS"
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case AddIfNotExists:
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return "ADD_IF_NOT_EXISTS"
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case IgnoreIfExists:
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return "IGNORE_IF_EXISTS"
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default:
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return "UNKNOWN"
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}
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}
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// Route is network route
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type Route struct {
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// Destination is destination address
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Destination string
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// Gateway is route gateway
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Gateway string
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// Router is the network router address
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Router string
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// Network is micro network address
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Network string
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// Metric is the route cost metric
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Metric int
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// Policy defines route policy
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Policy RoutePolicy
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}
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// String allows to print the route
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func (r *Route) String() string {
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// this will help us build routing table string
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sb := &strings.Builder{}
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// create nice table printing structure
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table := tablewriter.NewWriter(sb)
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table.SetHeader([]string{"Destination", "Gateway", "Router", "Network", "Metric"})
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strRoute := []string{
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r.Destination,
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r.Gateway,
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r.Router,
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r.Network,
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fmt.Sprintf("%d", r.Metric),
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}
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table.Append(strRoute)
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// render table into sb
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table.Render()
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return sb.String()
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}
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