func (_ IP) Apply(m ma.Multiaddr, side int, ctx match.Context) error {
p := m.Protocols()[0]
name := p.Name
s, _ := m.ValueForProtocol(p.Code)
mctx := ctx.Misc()
ip := net.ParseIP(s)
if ip == nil {
return fmt.Errorf("incorrect ip %s", m)
}
switch name {
case "ip4":
if ip = ip.To4(); ip == nil {
return fmt.Errorf("incorrect ip4 %s", m)
}
case "ip6":
if ip = ip.To16(); ip == nil {
return fmt.Errorf("incorrent ip6 %s", m)
}
}
mctx.IPs = append(mctx.IPs, ip)
return nil
}
func (w WS) Apply(m ma.Multiaddr, side int, ctx match.Context) error {
var path string
// ws client matches /http/ws too, so /ws might not be the first protocol
for _, p := range m.Protocols() {
if p.Name == "ws" {
pth, err := m.ValueForProtocol(p.Code)
if err != nil {
return err
}
path = pth
break
}
}
sctx := ctx.Special()
mctx := ctx.Misc()
switch side {
case match.S_Client:
// resolve url
var url string
if mctx.Host != "" {
// this will make mctx.Host appear in http request headers,
// cloud servers often require that
url = fmt.Sprintf("ws://%s/%s", mctx.Host, path)
} else {
switch t := sctx.NetConn.(type) {
case *net.TCPConn:
url = fmt.Sprintf("ws://%s/%s", t.RemoteAddr().String(), path)
default:
url = fmt.Sprintf("ws://foo.bar/%s", path)
}
}
wcon, err := w.Select(sctx.NetConn, url)
if err != nil {
return err
}
sctx.NetConn = wcon
return nil
case match.S_Server:
if mctx.HTTPMux == nil {
// help the user out if /http is missing before /ws
HTTP{}.Apply(m, match.S_Server, ctx)
}
ln, err := w.Handle(mctx.HTTPMux, "/"+path)
if err != nil {
return err
}
sctx.NetListener = ln
sctx.CloseFn = ConcatClose(ln.Close, sctx.CloseFn)
return nil
}
return fmt.Errorf("incorrect side constant")
}
func (p HTTP) Apply(m ma.Multiaddr, side int, ctx match.Context) error {
mctx := ctx.Misc()
sctx := ctx.Special()
mctx.HTTPMux = p.Server(sctx.NetListener)
ctx.Reuse(&httpreuser{ctx.Special().PreAddr})
return nil
}
func (t TCP) Apply(m ma.Multiaddr, side int, ctx match.Context) error {
p := m.Protocols()[0]
portstr, _ := m.ValueForProtocol(p.Code)
port, err := strconv.Atoi(portstr)
if err != nil {
return err
}
mctx := ctx.Misc()
sctx := ctx.Special()
if len(mctx.IPs) == 0 {
return fmt.Errorf("no ips in context")
}
switch side {
case match.S_Client:
var con net.Conn
var err error
if len(mctx.IPs) == 1 {
con, err = t.Dial(mctx.IPs[0], port)
} else {
con, err = t.DialMany(mctx.IPs, port)
}
if err != nil {
return err
}
sctx.NetConn = con
sctx.CloseFn = con.Close
return nil
case match.S_Server:
netln, err := t.Listen(mctx.IPs[0], port)
if err != nil {
return err
}
sctx.NetListener = netln
sctx.CloseFn = netln.Close
return nil
}
return fmt.Errorf("incorrect side constant")
}
func (_ DNS) Apply(m ma.Multiaddr, side int, ctx match.Context) error {
p := m.Protocols()[0]
host, _ := m.ValueForProtocol(p.Code)
ips, err := net.LookupIP(host)
if err != nil {
return err
}
if len(ips) == 0 {
return fmt.Errorf("failed to resolve domain")
}
mctx := ctx.Misc()
mctx.Host = host
mctx.IPs = ips
return nil
}
func (ctx context) CopyTo(target match.Context) {
// shallow copy
*target.Misc() = ctx.misc
*target.Special() = ctx.special
trg := target.Map()
for k, val := range ctx.Map() {
// If we want to allow pointers to structs in the map, we have to copy
// one level deeper, i.e. instead of copying the pointer, reflect and
// copy what it points to.
rval := reflect.ValueOf(val)
if rval.Kind() == reflect.Ptr {
rv := reflect.New(rval.Type().Elem())
rv.Elem().Set(rval.Elem())
trg[k] = rv.Interface()
} else {
trg[k] = val
}
}
}