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https://github.com/cwinfo/yggdrasil-go.git
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Try to exchange MTUs when creating sessions
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parent
38567fffef
commit
536974f20c
@ -223,6 +223,7 @@ func (a *admin) getData_getSessions() []admin_nodeInfo {
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info := admin_nodeInfo{
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info := admin_nodeInfo{
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{"IP", net.IP(sinfo.theirAddr[:]).String()},
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{"IP", net.IP(sinfo.theirAddr[:]).String()},
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{"coords", fmt.Sprint(sinfo.coords)},
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{"coords", fmt.Sprint(sinfo.coords)},
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{"MTU", fmt.Sprint(sinfo.getMTU())},
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}
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}
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infos = append(infos, info)
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infos = append(infos, info)
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}
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}
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@ -5,6 +5,7 @@ package yggdrasil
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// The session information consists of crypto keys and coords
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// The session information consists of crypto keys and coords
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import "time"
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import "time"
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import "net"
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type sessionInfo struct {
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type sessionInfo struct {
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core *Core
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core *Core
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@ -19,6 +20,8 @@ type sessionInfo struct {
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myHandle handle
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myHandle handle
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theirNonce boxNonce
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theirNonce boxNonce
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myNonce boxNonce
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myNonce boxNonce
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theirMTU uint16
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myMTU uint16
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time time.Time // Time we last received a packet
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time time.Time // Time we last received a packet
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coords []byte // coords of destination
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coords []byte // coords of destination
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packet []byte // a buffered packet, sent immediately on ping/pong
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packet []byte // a buffered packet, sent immediately on ping/pong
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@ -36,6 +39,7 @@ type sessionPing struct {
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coords []byte
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coords []byte
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tstamp int64 // unix time, but the only real requirement is that it increases
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tstamp int64 // unix time, but the only real requirement is that it increases
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isPong bool
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isPong bool
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mtu uint16
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}
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}
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// Returns true if the session was updated, false otherwise
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// Returns true if the session was updated, false otherwise
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@ -56,6 +60,10 @@ func (s *sessionInfo) update(p *sessionPing) bool {
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s.theirNonce = boxNonce{}
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s.theirNonce = boxNonce{}
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s.nonceMask = 0
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s.nonceMask = 0
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}
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}
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s.core.log.Printf("Received MTU %d from %s", p.mtu, net.IP(s.theirAddr[:]).String())
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if p.mtu >= 1280 {
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s.theirMTU = p.mtu
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}
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s.coords = append([]byte{}, p.coords...)
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s.coords = append([]byte{}, p.coords...)
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s.time = time.Now()
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s.time = time.Now()
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s.tstamp = p.tstamp
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s.tstamp = p.tstamp
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@ -144,6 +152,8 @@ func (ss *sessions) createSession(theirPermKey *boxPubKey) *sessionInfo {
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sinfo.mySesPub = *pub
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sinfo.mySesPub = *pub
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sinfo.mySesPriv = *priv
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sinfo.mySesPriv = *priv
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sinfo.myNonce = *newBoxNonce()
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sinfo.myNonce = *newBoxNonce()
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sinfo.theirMTU = 1280
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sinfo.myMTU = uint16(ss.core.tun.mtu)
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higher := false
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higher := false
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for idx := range ss.core.boxPub {
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for idx := range ss.core.boxPub {
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if ss.core.boxPub[idx] > sinfo.theirPermPub[idx] {
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if ss.core.boxPub[idx] > sinfo.theirPermPub[idx] {
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@ -195,12 +205,14 @@ func (sinfo *sessionInfo) close() {
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func (ss *sessions) getPing(sinfo *sessionInfo) sessionPing {
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func (ss *sessions) getPing(sinfo *sessionInfo) sessionPing {
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loc := ss.core.switchTable.getLocator()
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loc := ss.core.switchTable.getLocator()
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coords := loc.getCoords()
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coords := loc.getCoords()
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sinfo.core.log.Printf("Sending MTU %d to %s", sinfo.myMTU, net.IP(sinfo.theirAddr[:]).String())
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ref := sessionPing{
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ref := sessionPing{
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sendPermPub: ss.core.boxPub,
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sendPermPub: ss.core.boxPub,
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handle: sinfo.myHandle,
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handle: sinfo.myHandle,
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sendSesPub: sinfo.mySesPub,
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sendSesPub: sinfo.mySesPub,
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tstamp: time.Now().Unix(),
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tstamp: time.Now().Unix(),
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coords: coords,
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coords: coords,
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mtu: sinfo.myMTU,
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}
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}
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sinfo.myNonce.update()
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sinfo.myNonce.update()
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return ref
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return ref
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@ -289,6 +301,13 @@ func (n *boxNonce) minus(m *boxNonce) int64 {
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return diff
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return diff
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}
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}
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func (sinfo *sessionInfo) getMTU() uint16 {
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if sinfo.theirMTU < sinfo.myMTU {
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return sinfo.theirMTU
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}
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return sinfo.myMTU
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}
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func (sinfo *sessionInfo) nonceIsOK(theirNonce *boxNonce) bool {
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func (sinfo *sessionInfo) nonceIsOK(theirNonce *boxNonce) bool {
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// The bitmask is to allow for some non-duplicate out-of-order packets
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// The bitmask is to allow for some non-duplicate out-of-order packets
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diff := theirNonce.minus(&sinfo.theirNonce)
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diff := theirNonce.minus(&sinfo.theirNonce)
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