74 lines
1.4 KiB
Go
74 lines
1.4 KiB
Go
package routes
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import (
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"crypto/sha256"
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"fmt"
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"net"
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"sync"
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"time"
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"github.com/crip/ripv2"
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)
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type Routes struct {
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Routes map[string]Route
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sync.Mutex
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}
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type Route struct {
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Addr net.IP
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Subnet net.IPMask
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Nexthop net.IP
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Metric uint32
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TTL time.Time
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}
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func New() *Routes {
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var routes Routes
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routes.Routes = make(map[string]Route, 25)
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return &routes
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}
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func (r *Routes) append(route Route) {
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key := route.Addr.String() + route.Subnet.String() + route.Nexthop.String() + fmt.Sprintf("%d", route.Metric)
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h := sha256.New()
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h.Write([]byte(key))
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bs := h.Sum(nil)
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r.Lock()
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defer r.Unlock()
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k, ok := r.Routes[string(bs)]
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if !ok {
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r.Routes[string(bs)] = route
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return
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}
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k.TTL = time.Now()
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r.Routes[string(bs)] = k
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}
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func (r *Routes) ParseRoutes(addr net.UDPAddr, rip *[25]ripv2.RIP) {
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var route Route
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for _, rip := range *rip {
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/* if not af_inet */
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if rip.AFI != 2 {
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continue
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}
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if rip.Addr == 0 || rip.Subnet == 0 {
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continue
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}
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route = Route{}
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route.Addr = net.IPv4(byte(rip.Addr>>24), byte(rip.Addr>>16), byte(rip.Addr>>8), byte(rip.Addr))
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route.Subnet = net.IPv4Mask(byte(rip.Subnet>>24), byte(rip.Subnet>>16), byte(rip.Subnet>>8), byte(rip.Subnet))
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if rip.Nexthop == 0 {
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route.Nexthop = addr.IP
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} else {
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route.Nexthop = net.IPv4(byte(rip.Nexthop>>24), byte(rip.Nexthop>>16), byte(rip.Nexthop>>8), byte(rip.Nexthop))
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}
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route.Metric = rip.Metric
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route.TTL = time.Now()
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r.append(route)
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}
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}
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