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|
package dht
import (
"fmt"
"net"
"strings"
)
func (n *Node) onPingQuery(rn remoteNode, msg map[string]interface{}) {
t := msg["t"].(string)
//n.log.Debug("ping", "source", rn)
n.queueMsg(rn, makeResponse(t, map[string]interface{}{
"id": string(n.id),
}))
}
func (n *Node) onGetPeersQuery(rn remoteNode, msg map[string]interface{}) {
a := msg["a"].(map[string]interface{})
if err := checkKey(a, "info_hash", "string"); err != nil {
//n.queueMsg(addr, makeError(t, protocolError, err.Error()))
return
}
// This is the ih of the torrent
th, err := InfohashFromString(a["info_hash"].(string))
if err != nil {
n.log.Warn("invalid torrent", "infohash", a["info_hash"])
}
n.log.Debug("get_peers query", "source", rn, "torrent", th)
token := []byte(*th)[:2]
id := generateNeighbour(n.id, *th)
nodes := n.rTable.get(8)
compactNS := []string{}
for _, rn := range nodes {
ns := encodeCompactNodeAddr(rn.address.String())
if ns == "" {
n.log.Warn("failed to compact node", "address", rn.address.String())
continue
}
compactNS = append(compactNS, ns)
}
t := msg["t"].(string)
n.queueMsg(rn, makeResponse(t, map[string]interface{}{
"id": string(id),
"token": token,
"nodes": strings.Join(compactNS, ""),
}))
//nodes := n.rTable.get(50)
/*
fmt.Printf("sending get_peers for %s to %d nodes\n", *th, len(nodes))
q := makeQuery(newTransactionID(), "get_peers", map[string]interface{}{
"id": string(id),
"info_hash": string(*th),
})
for _, o := range nodes {
n.queueMsg(*o, q)
}
*/
}
func (n *Node) onAnnouncePeerQuery(rn remoteNode, msg map[string]interface{}) {
a := msg["a"].(map[string]interface{})
err := checkKeys(a, [][]string{
{"info_hash", "string"},
{"port", "int"},
{"token", "string"},
})
if err != nil {
//n.queueMsg(addr, makeError(t, protocolError, err.Error()))
return
}
n.log.Debug("announce_peer", "source", rn)
// TODO
if impliedPort, ok := a["implied_port"]; ok && impliedPort.(int) != 0 {
// Use the port from the network
} else {
// Use the port in the message
host, _, err := net.SplitHostPort(rn.address.String())
if err != nil {
n.log.Warn("failed to split host/port", "error", err)
return
}
newPort := a["port"]
if newPort == 0 {
n.log.Warn("sent port 0", "source", rn)
return
}
addr, err := net.ResolveUDPAddr(n.family, fmt.Sprintf("%s:%d", host, newPort))
rn = remoteNode{address: addr, id: rn.id}
}
// TODO do we reply?
ih, err := InfohashFromString(a["info_hash"].(string))
if err != nil {
n.log.Warn("invalid torrent", "infohash", a["info_hash"])
}
p := Peer{Node: rn, Infohash: *ih}
n.log.Info("anounce_peer", p)
if n.OnAnnouncePeer != nil {
go n.OnAnnouncePeer(p)
}
}
func (n *Node) onFindNodeResponse(rn remoteNode, msg map[string]interface{}) {
r := msg["r"].(map[string]interface{})
if err := checkKey(r, "id", "string"); err != nil {
return
}
nodes := r["nodes"].(string)
n.processFindNodeResults(rn, nodes)
}
|
