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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,125 @@ | ||
| //go:build linux | ||
| // +build linux | ||
|
|
||
| package core | ||
|
|
||
| import ( | ||
| "context" | ||
| "net" | ||
| "net/url" | ||
| "strconv" | ||
| "strings" | ||
|
|
||
| "github.com/Arceliar/phony" | ||
| sctp "github.com/vikulin/sctp" | ||
| ) | ||
|
|
||
| type linkSCTP struct { | ||
| phony.Inbox | ||
| *links | ||
| listener *net.ListenConfig | ||
| _listeners map[*Listener]context.CancelFunc | ||
| } | ||
|
|
||
| func (l *links) newLinkSCTP() *linkSCTP { | ||
| lt := &linkSCTP{ | ||
| links: l, | ||
| listener: &net.ListenConfig{ | ||
| KeepAlive: -1, | ||
| }, | ||
| _listeners: map[*Listener]context.CancelFunc{}, | ||
| } | ||
| return lt | ||
| } | ||
|
|
||
| func (l *linkSCTP) dial(tx context.Context, url *url.URL, info linkInfo, options linkOptions) (net.Conn, error) { | ||
| host, port, err := net.SplitHostPort(url.Host) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| dst, err := net.ResolveIPAddr("ip", host) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| raddress := l.getAddress(dst.String() + ":" + port) | ||
| var conn net.Conn | ||
| laddress := l.getAddress("0.0.0.0:0") | ||
| conn, err = sctp.NewSCTPConnection(laddress, laddress.AddressFamily, sctp.InitMsg{NumOstreams: 2, MaxInstreams: 2, MaxAttempts: 2, MaxInitTimeout: 5}, sctp.OneToOne, false) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| err = conn.(*sctp.SCTPConn).Connect(raddress) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| //conn.(*sctp.SCTPConn).SetWriteBuffer(324288) | ||
| //conn.(*sctp.SCTPConn).SetReadBuffer(324288) | ||
| //wbuf, _ := conn.(*sctp.SCTPConn).GetWriteBuffer() | ||
| //rbuf, _ := conn.(*sctp.SCTPConn).GetReadBuffer() | ||
|
|
||
| //l.core.log.Printf("Read buffer %d", rbuf) | ||
| //l.core.log.Printf("Write buffer %d", wbuf) | ||
| err = conn.(*sctp.SCTPConn).SetEvents(sctp.SCTP_EVENT_DATA_IO) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| return conn, nil | ||
| } | ||
|
|
||
| func (l *linkSCTP) listen(ctx context.Context, url *url.URL, sintf string) (net.Listener, error) { | ||
| addr := l.getAddress(url.Host) | ||
| listener, err := sctp.NewSCTPListener(addr, sctp.InitMsg{NumOstreams: 2, MaxInstreams: 2, MaxAttempts: 2, MaxInitTimeout: 5}, sctp.OneToOne, false) | ||
|
|
||
| if err != nil { | ||
| //cancel() | ||
| return nil, err | ||
| } | ||
| err = listener.SetEvents(sctp.SCTP_EVENT_DATA_IO) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| return listener, nil | ||
| } | ||
|
|
||
| // Returns the address of the listener. | ||
| // | ||
| //nolint:unused | ||
| func (l *linkSCTP) getAddr() *net.TCPAddr { | ||
| // TODO: Fix this, because this will currently only give a single address | ||
| // to multicast.go, which obviously is not great, but right now multicast.go | ||
| // doesn't have the ability to send more than one address in a packet either | ||
| var addr *net.TCPAddr | ||
| phony.Block(l, func() { | ||
| for listener := range l._listeners { | ||
| addr = listener.Addr().(*net.TCPAddr) | ||
| } | ||
| }) | ||
| return addr | ||
| } | ||
|
|
||
| // SCTP infrastructure | ||
| func (l *linkSCTP) getAddress(host string) *sctp.SCTPAddr { | ||
|
|
||
| //sctp supports multihoming but current implementation reuires only one path | ||
| ips := []net.IPAddr{} | ||
| ip, port, err := net.SplitHostPort(host) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| for _, i := range strings.Split(ip, ",") { | ||
| if a, err := net.ResolveIPAddr("ip", i); err == nil { | ||
| l.core.log.Printf("Resolved address '%s' to %s", i, a) | ||
| ips = append(ips, *a) | ||
| } else { | ||
| l.core.log.Errorln("Error resolving address '%s': %v", i, err) | ||
| } | ||
| } | ||
| p, _ := strconv.Atoi(port) | ||
| addr := &sctp.SCTPAddr{ | ||
| IPAddrs: ips, | ||
| Port: p, | ||
| } | ||
| return addr | ||
| } |