96 lines
2.4 KiB
Go
96 lines
2.4 KiB
Go
// Package router provides a network routing control plane
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package router
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import (
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"errors"
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"hash/fnv"
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)
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var (
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// DefaultLink is default network link
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DefaultLink = "local"
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// DefaultLocalMetric is default route cost for a local route
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DefaultMetric int64 = 1
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// DefaultNetwork is default micro network
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DefaultNetwork = "micro"
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// ErrRouteNotFound is returned when no route was found in the routing table
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ErrRouteNotFound = errors.New("route not found")
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// ErrDuplicateRoute is returned when the route already exists
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ErrDuplicateRoute = errors.New("duplicate route")
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)
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// Router is an interface for a routing control plane
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type Router interface {
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// Init initializes the router with options
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Init(...Option) error
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// Options returns the router options
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Options() Options
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// The routing table
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Table() Table
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// Lookup queries routes in the routing table
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Lookup(service string, opts ...LookupOption) ([]Route, error)
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// Watch returns a watcher which tracks updates to the routing table
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Watch(opts ...WatchOption) (Watcher, error)
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// Close the router
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Close() error
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// Returns the router implementation
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String() string
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}
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// Table is an interface for routing table
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type Table interface {
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// Create new route in the routing table
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Create(Route) error
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// Delete existing route from the routing table
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Delete(Route) error
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// Update route in the routing table
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Update(Route) error
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// List all routes in the table
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List() ([]Route, error)
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// Query routes in the routing table
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Query(service string) ([]Route, error)
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}
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// Option used by the router
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type Option func(*Options)
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// StatusCode defines router status
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type StatusCode int
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const (
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// Running means the router is up and running
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Running StatusCode = iota
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// Stopped means the router has been stopped
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Stopped
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// Error means the router has encountered error
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Error
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)
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// Route is a network route
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type Route struct {
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// Service is destination service name
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Service string
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// Address is service node address
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Address string
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// Gateway is route gateway
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Gateway string
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// Network is network address
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Network string
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// Router is router id
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Router string
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// Link is network link
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Link string
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// Metric is the route cost metric
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Metric int64
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// Metadata for the route
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Metadata map[string]string
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}
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// Hash returns route hash sum.
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func (r *Route) Hash() uint64 {
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h := fnv.New64()
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h.Reset()
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h.Write([]byte(r.Service + r.Address + r.Gateway + r.Network + r.Router + r.Link))
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return h.Sum64()
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}
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