yggdrasil-network/yggdrasil-go
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Use larger UDP chunks for link-local IP and let the OS fragment it. Switch to UDP for link-local peers. Minor code cleanup for TCP.

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This commit is contained in:
Arceliar 2018-02-19 19:34:51 -06:00
parent 8c7d514032
commit 4045597516
4 changed files with 53 additions and 47 deletions
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52
src/yggdrasil/udp.go
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@ -46,16 +46,17 @@ func (c *connAddr) toUDPAddr() *net.UDPAddr {
}
type connInfo struct {
name string
addr connAddr
peer *peer
linkIn chan []byte
keysIn chan *udpKeys
timeout int // count of how many heartbeats have been missed
in func([]byte)
out chan []byte
countIn uint8
countOut uint8
name string
addr connAddr
peer *peer
linkIn chan []byte
keysIn chan *udpKeys
timeout int // count of how many heartbeats have been missed
in func([]byte)
out chan []byte
countIn uint8
countOut uint8
chunkSize uint16
}
type udpKeys struct {
@ -73,6 +74,8 @@ func (iface *udpInterface) init(core *Core, addr string) {
if err != nil {
panic(err)
}
//iface.sock.SetReadBuffer(1048576)
//iface.sock.SetWriteBuffer(1048576)
iface.conns = make(map[connAddr]*connInfo)
go iface.reader()
}
@ -162,12 +165,16 @@ func (iface *udpInterface) handleKeys(msg []byte, addr connAddr) {
themAddrString := net.IP(themAddr[:]).String()
themString := fmt.Sprintf("%s@%s", themAddrString, udpAddr.String())
conn = &connInfo{
name: themString,
addr: connAddr(addr),
peer: iface.core.peers.newPeer(&ks.box, &ks.sig),
linkIn: make(chan []byte, 1),
keysIn: make(chan *udpKeys, 1),
out: make(chan []byte, 32),
name: themString,
addr: connAddr(addr),
peer: iface.core.peers.newPeer(&ks.box, &ks.sig),
linkIn: make(chan []byte, 1),
keysIn: make(chan *udpKeys, 1),
out: make(chan []byte, 32),
chunkSize: 576 - 60 - 8 - 3, // max save - max ip - udp header - chunk overhead
}
if udpAddr.IP.IsLinkLocalUnicast() {
conn.chunkSize = 65535 - 8 - 3
}
/*
conn.in = func (msg []byte) { conn.peer.handlePacket(msg, conn.linkIn) }
@ -236,8 +243,8 @@ func (iface *udpInterface) handleKeys(msg []byte, addr connAddr) {
for msg := range conn.out {
chunks = chunks[:0]
bs := msg
for len(bs) > udp_chunkSize {
chunks, bs = append(chunks, bs[:udp_chunkSize]), bs[udp_chunkSize:]
for len(bs) > int(conn.chunkSize) {
chunks, bs = append(chunks, bs[:conn.chunkSize]), bs[conn.chunkSize:]
}
chunks = append(chunks, bs)
//iface.core.log.Println("DEBUG: out chunks:", len(chunks), len(msg))
@ -284,7 +291,7 @@ func (iface *udpInterface) handlePacket(msg []byte, addr connAddr) {
}
func (iface *udpInterface) reader() {
bs := make([]byte, 2048) // This needs to be large enough for everything...
bs := make([]byte, 65536) // This needs to be large enough for everything...
for {
//iface.core.log.Println("Starting read")
n, udpAddr, err := iface.sock.ReadFromUDP(bs)
@ -293,9 +300,7 @@ func (iface *udpInterface) reader() {
panic(err)
break
}
if n > 1500 {
panic(n)
}
//iface.core.log.Println("DEBUG: recv len:", n)
//msg := append(util_getBytes(), bs[:n]...)
msg := bs[:n]
var addr connAddr
@ -319,7 +324,8 @@ func (iface *udpInterface) reader() {
////////////////////////////////////////////////////////////////////////////////
const udp_chunkSize = 508 // Apparently the maximum guaranteed safe IPv4 size
//const udp_chunkSize = 508 // Apparently the maximum guaranteed safe IPv4 size
//const udp_chunkSize = 65535 - 3 - 8
func udp_decode(bs []byte) (chunks, chunk, count uint8, payload []byte) {
if len(bs) >= 3 {