mirror of
https://github.com/cgrates/cgrates.git
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210 lines
8.9 KiB
Go
210 lines
8.9 KiB
Go
/*
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Real-time Charging System for Telecom & ISP environments
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Copyright (C) 2012-2015 ITsysCOM GmbH
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>
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*/
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package agents
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import (
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"fmt"
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"strconv"
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"github.com/cgrates/cgrates/config"
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"github.com/cgrates/cgrates/engine"
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"github.com/cgrates/cgrates/utils"
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"github.com/cgrates/rpcclient"
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"github.com/fiorix/go-diameter/diam"
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"github.com/fiorix/go-diameter/diam/datatype"
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"github.com/fiorix/go-diameter/diam/sm"
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)
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func NewDiameterAgent(cgrCfg *config.CGRConfig, smg *rpcclient.RpcClient, pubsubs *rpcclient.RpcClient) (*DiameterAgent, error) {
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da := &DiameterAgent{cgrCfg: cgrCfg, smg: smg, pubsubs: pubsubs}
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dictsDir := cgrCfg.DiameterAgentCfg().DictionariesDir
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if len(dictsDir) != 0 {
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if err := loadDictionaries(dictsDir, "DiameterAgent"); err != nil {
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return nil, err
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}
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}
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return da, nil
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}
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type DiameterAgent struct {
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cgrCfg *config.CGRConfig
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smg *rpcclient.RpcClient // Connection towards CGR-SMG component
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pubsubs *rpcclient.RpcClient // Connection towards CGR-PubSub component
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}
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// Creates the message handlers
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func (self *DiameterAgent) handlers() diam.Handler {
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settings := &sm.Settings{
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OriginHost: datatype.DiameterIdentity(self.cgrCfg.DiameterAgentCfg().OriginHost),
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OriginRealm: datatype.DiameterIdentity(self.cgrCfg.DiameterAgentCfg().OriginRealm),
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VendorID: datatype.Unsigned32(self.cgrCfg.DiameterAgentCfg().VendorId),
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ProductName: datatype.UTF8String(self.cgrCfg.DiameterAgentCfg().ProductName),
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FirmwareRevision: datatype.Unsigned32(utils.DIAMETER_FIRMWARE_REVISION),
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}
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dSM := sm.New(settings)
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dSM.HandleFunc("CCR", self.handleCCR)
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dSM.HandleFunc("ALL", self.handleALL)
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go func() {
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for err := range dSM.ErrorReports() {
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utils.Logger.Err(fmt.Sprintf("<DiameterAgent> StateMachine error: %+v", err))
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}
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}()
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return dSM
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}
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func (self DiameterAgent) processCCR(ccr *CCR, reqProcessor *config.DARequestProcessor) *CCA {
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passesAllFilters := true
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for _, fldFilter := range reqProcessor.RequestFilter {
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if passes, _ := passesFieldFilter(ccr.diamMessage, fldFilter); !passes {
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passesAllFilters = false
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}
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}
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if !passesAllFilters { // Not going with this processor further
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return nil
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}
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if reqProcessor.DryRun { // DryRun should log the matching processor as well as the received CCR
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utils.Logger.Info(fmt.Sprintf("<DiameterAgent> RequestProcessor: %s", reqProcessor.Id))
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utils.Logger.Info(fmt.Sprintf("<DiameterAgent> CCR message: %s", ccr.diamMessage))
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}
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cca := NewBareCCAFromCCR(ccr, self.cgrCfg.DiameterAgentCfg().OriginHost, self.cgrCfg.DiameterAgentCfg().OriginRealm)
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smgEv, err := ccr.AsSMGenericEvent(reqProcessor.CCRFields)
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if err != nil {
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if err := messageSetAVPsWithPath(cca.diamMessage, []interface{}{"Result-Code"}, strconv.Itoa(DiameterRatingFailed),
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false, self.cgrCfg.DiameterAgentCfg().Timezone); err != nil {
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utils.Logger.Err(fmt.Sprintf("<DiameterAgent> Processing message: %+v set CCA reply-code, error: %s", ccr.diamMessage, err))
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return nil
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}
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utils.Logger.Err(fmt.Sprintf("<DiameterAgent> Processing message: %+v AsSMGenericEvent, error: %s", ccr.diamMessage, err))
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return cca
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}
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if reqProcessor.PublishEvent && self.pubsubs != nil {
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evt, err := smgEv.AsMapStringString()
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if err != nil {
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utils.Logger.Err(fmt.Sprintf("<DiameterAgent> Processing message: %+v failed converting SMGEvent to pubsub one, error: %s", ccr.diamMessage, err))
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return nil
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}
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var reply string
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if err := self.pubsubs.Call("PubSubV1.Publish", engine.CgrEvent(evt), &reply); err != nil {
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utils.Logger.Err(fmt.Sprintf("<DiameterAgent> Processing message: %+v failed publishing event, error: %s", ccr.diamMessage, err))
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return nil
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}
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}
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var maxUsage float64
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if reqProcessor.DryRun { // DryRun does not send over network
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utils.Logger.Info(fmt.Sprintf("<DiameterAgent> SMGenericEvent: %+v", smgEv))
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if err := messageSetAVPsWithPath(cca.diamMessage, []interface{}{"Result-Code"}, strconv.Itoa(diam.LimitedSuccess),
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false, self.cgrCfg.DiameterAgentCfg().Timezone); err != nil {
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utils.Logger.Err(fmt.Sprintf("<DiameterAgent> Processing message: %+v set CCA Reply-Code, error: %s", ccr.diamMessage, err))
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return nil
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}
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} else { // Find out maxUsage over APIs
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switch ccr.CCRequestType {
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case 1:
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err = self.smg.Call("SMGenericV1.SessionStart", smgEv, &maxUsage)
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case 2:
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err = self.smg.Call("SMGenericV1.SessionUpdate", smgEv, &maxUsage)
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case 3, 4:
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var rpl string
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if ccr.CCRequestType == 3 {
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err = self.smg.Call("SMGenericV1.SessionEnd", smgEv, &rpl)
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} else if ccr.CCRequestType == 4 {
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err = self.smg.Call("SMGenericV1.ChargeEvent", smgEv, &maxUsage)
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if maxUsage == 0 {
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smgEv[utils.USAGE] = 0 // For CDR not to debit
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}
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}
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if self.cgrCfg.DiameterAgentCfg().CreateCDR {
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if errCdr := self.smg.Call("SMGenericV1.ProcessCdr", smgEv, &rpl); errCdr != nil {
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err = errCdr
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}
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}
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}
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if err != nil {
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if err := messageSetAVPsWithPath(cca.diamMessage, []interface{}{"Result-Code"}, strconv.Itoa(DiameterRatingFailed),
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false, self.cgrCfg.DiameterAgentCfg().Timezone); err != nil {
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utils.Logger.Err(fmt.Sprintf("<DiameterAgent> Processing message: %+v set CCA Reply-Code, error: %s", ccr.diamMessage, err))
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return nil
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}
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utils.Logger.Err(fmt.Sprintf("<DiameterAgent> Processing message: %+v, API error: %s", ccr.diamMessage, err))
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return cca
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}
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var unauthorizedResultCode bool
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if ccr.CCRequestType != 3 && ccr.CCRequestType != 4 && maxUsage == 0 { // Not enough balance, RFC demands 4012
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if err := messageSetAVPsWithPath(cca.diamMessage, []interface{}{"Result-Code"}, "4012",
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false, self.cgrCfg.DiameterAgentCfg().Timezone); err != nil {
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utils.Logger.Err(fmt.Sprintf("<DiameterAgent> Processing message: %+v set CCA Reply-Code, error: %s", ccr.diamMessage, err))
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return nil
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}
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unauthorizedResultCode = true
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} else if err := messageSetAVPsWithPath(cca.diamMessage, []interface{}{"Result-Code"}, strconv.Itoa(diam.Success),
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false, self.cgrCfg.DiameterAgentCfg().Timezone); err != nil {
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utils.Logger.Err(fmt.Sprintf("<DiameterAgent> Processing message: %+v set CCA Reply-Code, error: %s", ccr.diamMessage, err))
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return nil
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}
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if ccr.CCRequestType != 3 && ccr.CCRequestType != 4 && !unauthorizedResultCode { // For terminate or previously marked unauthorized, we don't add granted-service-unit AVP
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if err := messageSetAVPsWithPath(cca.diamMessage, []interface{}{"Granted-Service-Unit", "CC-Time"}, strconv.FormatFloat(maxUsage, 'f', 0, 64),
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false, self.cgrCfg.DiameterAgentCfg().Timezone); err != nil {
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utils.Logger.Err(fmt.Sprintf("<DiameterAgent> Processing message: %+v set CCA Granted-Service-Unit, error: %s", ccr.diamMessage, err))
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return nil
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}
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}
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}
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if err := cca.SetProcessorAVPs(reqProcessor, maxUsage); err != nil {
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if err := messageSetAVPsWithPath(cca.diamMessage, []interface{}{"Result-Code"}, strconv.Itoa(DiameterRatingFailed),
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false, self.cgrCfg.DiameterAgentCfg().Timezone); err != nil {
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utils.Logger.Err(fmt.Sprintf("<DiameterAgent> Processing message: %+v set CCA Reply-Code, error: %s", ccr.diamMessage, err))
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return nil
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}
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utils.Logger.Err(fmt.Sprintf("<DiameterAgent> CCA SetProcessorAVPs for message: %+v, error: %s", ccr.diamMessage, err))
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return cca
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}
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return cca
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}
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func (self *DiameterAgent) handleCCR(c diam.Conn, m *diam.Message) {
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ccr, err := NewCCRFromDiameterMessage(m, self.cgrCfg.DiameterAgentCfg().DebitInterval)
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if err != nil {
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utils.Logger.Err(fmt.Sprintf("<DiameterAgent> Unmarshaling message: %s, error: %s", m, err))
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return
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}
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var cca *CCA // For now we simply overload in loop, maybe we will find some other use of this
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for _, reqProcessor := range self.cgrCfg.DiameterAgentCfg().RequestProcessors {
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cca = self.processCCR(ccr, reqProcessor)
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if cca != nil && !reqProcessor.ContinueOnSuccess {
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break
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}
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}
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if cca == nil {
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utils.Logger.Err(fmt.Sprintf("<DiameterAgent> No request processor enabled for CCR: %s, ignoring request", ccr.diamMessage))
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return
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}
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if _, err := cca.AsDiameterMessage().WriteTo(c); err != nil {
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utils.Logger.Err(fmt.Sprintf("<DiameterAgent> Failed to write message to %s: %s\n%s\n", c.RemoteAddr(), err, cca.AsDiameterMessage()))
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return
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}
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}
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func (self *DiameterAgent) handleALL(c diam.Conn, m *diam.Message) {
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utils.Logger.Warning(fmt.Sprintf("<DiameterAgent> Received unexpected message from %s:\n%s", c.RemoteAddr(), m))
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}
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func (self *DiameterAgent) ListenAndServe() error {
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return diam.ListenAndServe(self.cgrCfg.DiameterAgentCfg().Listen, self.handlers(), nil)
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}
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