forked from fiorix/go-diameter
/
server.go
248 lines (217 loc) · 9.58 KB
/
server.go
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// Copyright 2013-2015 go-diameter authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Diameter server example. This is by no means a complete server.
//
// If you'd like to test diameter over SSL, generate SSL certificates:
// go run $GOROOT/src/crypto/tls/generate_cert.go --host localhost
//
// And start the server with `-cert_file cert.pem -key_file key.pem`.
//
// By default this server runs in a single OS thread. If you want to
// make it run on more, set the GOMAXPROCS=n environment variable.
// See Go's FAQ for details: http://golang.org/doc/faq#Why_no_multi_CPU
package main
import (
"flag"
"fmt"
"log"
"net/http"
_ "net/http/pprof"
"github.com/fiorix/go-diameter/v4/diam"
"github.com/fiorix/go-diameter/v4/diam/avp"
"github.com/fiorix/go-diameter/v4/diam/datatype"
"github.com/fiorix/go-diameter/v4/diam/sm"
"io"
)
const (
VENDOR_3GPP = 10415
)
func main() {
addr := flag.String("addr", ":3868", "address in the form of ip:port to listen on")
ppaddr := flag.String("pprof_addr", ":9000", "address in form of ip:port for the pprof server")
host := flag.String("diam_host", "server", "diameter identity host")
realm := flag.String("diam_realm", "go-diameter", "diameter identity realm")
certFile := flag.String("cert_file", "", "tls certificate file (optional)")
keyFile := flag.String("key_file", "", "tls key file (optional)")
networkType := flag.String("network_type", "tcp", "protocol type tcp/sctp")
flag.Parse()
settings := &sm.Settings{
OriginHost: datatype.DiameterIdentity(*host),
OriginRealm: datatype.DiameterIdentity(*realm),
VendorID: 13,
ProductName: "go-diameter",
FirmwareRevision: 1,
}
// Create the state machine (mux) and set .CollectGarbage(context.Background(), &protos.Void{})its message handlers.
mux := sm.New(settings)
mux.Handle("ULR", handleULR(*settings))
mux.Handle("AIR", handleAIR(*settings))
mux.HandleFunc("ALL", handleALL) // Catch all.
// Print error reports.
go printErrors(mux.ErrorReports())
if len(*ppaddr) > 0 {
go func() { log.Fatal(http.ListenAndServe(*ppaddr, nil)) }()
}
err := listen(*networkType, *addr, *certFile, *keyFile, mux)
if err != nil {
log.Fatal(err)
}
}
func sendAIA(settings sm.Settings, w io.Writer, m *diam.Message) (n int64, err error) {
m.NewAVP(avp.AuthenticationInfo, avp.Mbit, VENDOR_3GPP, &diam.GroupedAVP{
AVP: []*diam.AVP{
diam.NewAVP(avp.EUTRANVector, avp.Mbit, VENDOR_3GPP, &diam.GroupedAVP{
AVP: []*diam.AVP{
diam.NewAVP(avp.RAND, avp.Mbit|avp.Vbit, VENDOR_3GPP, datatype.OctetString("\x94\xbf/T\xc3v\xf3\x0e\x87\x83\x06k'\x18Z\x19")),
diam.NewAVP(avp.XRES, avp.Mbit|avp.Vbit, VENDOR_3GPP, datatype.OctetString("F\xf0\"\xb9%#\xf58")),
diam.NewAVP(avp.AUTN, avp.Mbit|avp.Vbit, VENDOR_3GPP, datatype.OctetString("\xc7G!;\xad~\x80\x00)\x08o%\x11\x0cP_")),
diam.NewAVP(avp.KASME, avp.Mbit|avp.Vbit, VENDOR_3GPP, datatype.OctetString("\xbf\x00\xf9\x80h3\"\x0e\xa1\x1c\xfa\x93\x03@\xd6\xf8\x02\xd51Y\xeb\xc4\x9d=\t\x14{\xeb!\xec\xcb:")),
},
}),
},
})
return m.WriteTo(w)
}
func handleAIR(settings sm.Settings) diam.HandlerFunc {
type RequestedEUTRANAuthInfo struct {
NumVectors datatype.Unsigned32 `avp:"Number-Of-Requested-Vectors"`
ImmediateResponse datatype.Unsigned32 `avp:"Immediate-Response-Preferred"`
ResyncInfo datatype.OctetString `avp:"Re-synchronization-Info"`
}
type AIR struct {
SessionID datatype.UTF8String `avp:"Session-Id"`
OriginHost datatype.DiameterIdentity `avp:"Origin-Host"`
OriginRealm datatype.DiameterIdentity `avp:"Origin-Realm"`
AuthSessionState datatype.UTF8String `avp:"Auth-Session-State"`
UserName string `avp:"User-Name"`
VisitedPLMNID datatype.OctetString `avp:"Visited-PLMN-Id"`
RequestedEUTRANAuthInfo RequestedEUTRANAuthInfo `avp:"Requested-EUTRAN-Authentication-Info"`
}
return func(c diam.Conn, m *diam.Message) {
var err error
var req AIR
var code uint32
err = m.Unmarshal(&req)
if err != nil {
err = fmt.Errorf("Unmarshal failed: %s", err)
code = diam.UnableToComply
log.Printf("Invalid AIR(%d): %s\n", code, err.Error())
} else {
code = diam.Success
}
a := m.Answer(code)
// SessionID is required to be the AVP in position 1
a.InsertAVP(diam.NewAVP(avp.SessionID, avp.Mbit, 0, req.SessionID))
a.NewAVP(avp.OriginHost, avp.Mbit, 0, settings.OriginHost)
a.NewAVP(avp.OriginRealm, avp.Mbit, 0, settings.OriginRealm)
a.NewAVP(avp.OriginStateID, avp.Mbit, 0, settings.OriginStateID)
_, err = sendAIA(settings, c, a)
if err != nil {
log.Printf("Failed to send AIA: %s", err.Error())
}
}
}
func sendULA(settings sm.Settings, w io.Writer, m *diam.Message) (n int64, err error) {
m.NewAVP(avp.ULAFlags, avp.Mbit|avp.Vbit, VENDOR_3GPP, datatype.Unsigned32(1))
m.NewAVP(avp.SubscriptionData, avp.Mbit, VENDOR_3GPP, &diam.GroupedAVP{
AVP: []*diam.AVP{
diam.NewAVP(avp.MSISDN, avp.Mbit|avp.Vbit, VENDOR_3GPP, datatype.OctetString("12345")),
diam.NewAVP(avp.AccessRestrictionData, avp.Mbit|avp.Vbit, VENDOR_3GPP, datatype.Unsigned32(47)),
diam.NewAVP(avp.SubscriberStatus, avp.Mbit|avp.Vbit, VENDOR_3GPP, datatype.Unsigned32(0)),
diam.NewAVP(avp.NetworkAccessMode, avp.Mbit|avp.Vbit, VENDOR_3GPP, datatype.Unsigned32(2)),
diam.NewAVP(avp.AMBR, avp.Mbit|avp.Vbit, VENDOR_3GPP, &diam.GroupedAVP{
AVP: []*diam.AVP{
diam.NewAVP(avp.MaxRequestedBandwidthDL, avp.Mbit|avp.Vbit, VENDOR_3GPP, datatype.Unsigned32(500)),
diam.NewAVP(avp.MaxRequestedBandwidthUL, avp.Mbit|avp.Vbit, VENDOR_3GPP, datatype.Unsigned32(500)),
},
}),
diam.NewAVP(avp.APNConfigurationProfile, avp.Mbit|avp.Vbit, VENDOR_3GPP, &diam.GroupedAVP{
AVP: []*diam.AVP{
diam.NewAVP(avp.ContextIdentifier, avp.Mbit|avp.Vbit, VENDOR_3GPP, datatype.Unsigned32(0)),
diam.NewAVP(avp.AllAPNConfigurationsIncludedIndicator, avp.Mbit|avp.Vbit, VENDOR_3GPP, datatype.Unsigned32(0)),
diam.NewAVP(avp.NetworkAccessMode, avp.Mbit|avp.Vbit, VENDOR_3GPP, datatype.Unsigned32(2)),
diam.NewAVP(avp.APNConfiguration, avp.Mbit, VENDOR_3GPP, &diam.GroupedAVP{
AVP: []*diam.AVP{
diam.NewAVP(avp.ContextIdentifier, avp.Mbit|avp.Vbit, VENDOR_3GPP, datatype.Unsigned32(0)),
diam.NewAVP(avp.PDNType, avp.Mbit|avp.Vbit, VENDOR_3GPP, datatype.Unsigned32(0)),
diam.NewAVP(avp.ServiceSelection, avp.Mbit|avp.Vbit, VENDOR_3GPP, datatype.UTF8String("oai.ipv4")),
diam.NewAVP(avp.EPSSubscribedQoSProfile, avp.Mbit|avp.Vbit, VENDOR_3GPP, &diam.GroupedAVP{
AVP: []*diam.AVP{
diam.NewAVP(avp.QoSClassIdentifier, avp.Mbit|avp.Vbit, VENDOR_3GPP, datatype.Unsigned32(9)),
diam.NewAVP(avp.AllocationRetentionPriority, avp.Mbit|avp.Vbit, VENDOR_3GPP, &diam.GroupedAVP{
AVP: []*diam.AVP{
diam.NewAVP(avp.PriorityLevel, avp.Mbit|avp.Vbit, VENDOR_3GPP, datatype.Unsigned32(15)),
diam.NewAVP(avp.PreemptionCapability, avp.Mbit|avp.Vbit, VENDOR_3GPP, datatype.Unsigned32(1)),
diam.NewAVP(avp.PreemptionVulnerability, avp.Mbit|avp.Vbit, VENDOR_3GPP, datatype.Unsigned32(0)),
},
}),
},
}),
},
}),
diam.NewAVP(avp.AMBR, avp.Mbit|avp.Vbit, VENDOR_3GPP, &diam.GroupedAVP{
AVP: []*diam.AVP{
diam.NewAVP(avp.MaxRequestedBandwidthDL, avp.Mbit|avp.Vbit, VENDOR_3GPP, datatype.Unsigned32(500)),
diam.NewAVP(avp.MaxRequestedBandwidthUL, avp.Mbit|avp.Vbit, VENDOR_3GPP, datatype.Unsigned32(500)),
},
}),
},
}),
},
})
return m.WriteTo(w)
}
func handleULR(settings sm.Settings) diam.HandlerFunc {
type ULR struct {
SessionID datatype.UTF8String `avp:"Session-Id"`
OriginHost datatype.DiameterIdentity `avp:"Origin-Host"`
OriginRealm datatype.DiameterIdentity `avp:"Origin-Realm"`
AuthSessionState datatype.Unsigned32 `avp:"Auth-Session-State"`
UserName datatype.UTF8String `avp:"User-Name"`
VisitedPLMNID datatype.OctetString `avp:"Visited-PLMN-Id"`
RATType datatype.Unsigned32 `avp:"RAT-Type"`
ULRFlags datatype.Unsigned32 `avp:"ULR-Flags"`
}
return func(c diam.Conn, m *diam.Message) {
var err error = nil
var req ULR
var code uint32
err = m.Unmarshal(&req)
if err != nil {
err = fmt.Errorf("Unmarshal failed: %s", err)
code = diam.UnableToComply
log.Printf("Invalid AIR(%d): %s\n", code, err.Error())
} else {
code = diam.Success
}
a := m.Answer(code)
// SessionID is required to be the AVP in position 1
a.InsertAVP(diam.NewAVP(avp.SessionID, avp.Mbit, 0, req.SessionID))
a.NewAVP(avp.AuthSessionState, avp.Mbit, 0, req.AuthSessionState)
a.NewAVP(avp.OriginHost, avp.Mbit, 0, settings.OriginHost)
a.NewAVP(avp.OriginRealm, avp.Mbit, 0, settings.OriginRealm)
a.NewAVP(avp.OriginStateID, avp.Mbit, 0, settings.OriginStateID)
_, err = sendULA(settings, c, a)
if err != nil {
log.Printf("Failed to send ULA: %s", err.Error())
}
}
}
func printErrors(ec <-chan *diam.ErrorReport) {
for err := range ec {
log.Println(err)
}
}
func listen(networkType, addr, cert, key string, handler diam.Handler) error {
// Start listening for connections.
if len(cert) > 0 && len(key) > 0 {
log.Println("Starting secure diameter server on", addr)
return diam.ListenAndServeNetworkTLS(networkType, addr, cert, key, handler, nil)
}
log.Println("Starting diameter server on", addr)
return diam.ListenAndServeNetwork(networkType, addr, handler, nil)
}
func handleALL(c diam.Conn, m *diam.Message) {
log.Printf("Received unexpected message from %s:\n%s", c.RemoteAddr(), m)
}