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6e971e954c
- Ping methods defined by engine.NewService for all services - Call methods were previously replaced by the centralized call method (on *birpc.Service) for all components - All services now register V1/V2 objects from apier package for consistency
475 lines
18 KiB
Go
475 lines
18 KiB
Go
/*
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Real-time Online/Offline Charging System (OCS) for Telecom & ISP environments
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Copyright (C) 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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"errors"
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"fmt"
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"regexp"
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"strings"
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"time"
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"github.com/cgrates/birpc"
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"github.com/cgrates/birpc/context"
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"github.com/cgrates/cgrates/engine"
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"github.com/cgrates/kamevapi"
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"github.com/cgrates/cgrates/config"
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"github.com/cgrates/cgrates/sessions"
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"github.com/cgrates/cgrates/utils"
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)
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var (
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kamAuthReqRegexp = regexp.MustCompile(CGR_AUTH_REQUEST)
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kamCallStartRegexp = regexp.MustCompile(CGR_CALL_START)
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kamCallEndRegexp = regexp.MustCompile(CGR_CALL_END)
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kamDlgListRegexp = regexp.MustCompile(CGR_DLG_LIST)
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kamProcessMessageRegex = regexp.MustCompile(CGR_PROCESS_MESSAGE)
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kamProcessCDRRegex = regexp.MustCompile(CGR_PROCESS_CDR)
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)
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func NewKamailioAgent(kaCfg *config.KamAgentCfg,
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connMgr *engine.ConnManager, timezone string) (*KamailioAgent, error) {
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ka := &KamailioAgent{
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cfg: kaCfg,
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connMgr: connMgr,
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timezone: timezone,
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conns: make([]*kamevapi.KamEvapi, len(kaCfg.EvapiConns)),
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activeSessionIDs: make(chan []*sessions.SessionID),
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}
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srv, err := birpc.NewServiceWithMethodsRename(ka, utils.AgentV1, true, func(oldFn string) (newFn string) {
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return strings.TrimPrefix(oldFn, "V1")
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})
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if err != nil {
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return nil, err
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}
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ka.ctx = context.WithClient(context.TODO(), srv)
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return ka, nil
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}
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type KamailioAgent struct {
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cfg *config.KamAgentCfg
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connMgr *engine.ConnManager
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timezone string
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conns []*kamevapi.KamEvapi
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activeSessionIDs chan []*sessions.SessionID
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ctx *context.Context
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}
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func (self *KamailioAgent) Connect() (err error) {
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eventHandlers := map[*regexp.Regexp][]func([]byte, int){
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kamAuthReqRegexp: {self.onCgrAuth},
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kamCallStartRegexp: {self.onCallStart},
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kamCallEndRegexp: {self.onCallEnd},
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kamDlgListRegexp: {self.onDlgList},
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kamProcessMessageRegex: {self.onCgrProcessMessage},
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kamProcessCDRRegex: {self.onCgrProcessCDR},
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}
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var reply string
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// make a call kamailio_agent -> sessions_conns to create an active client needed for syncSessions when restoring sessions, since prior clients are lost when engine shuts down
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if err := self.connMgr.Call(self.ctx, self.cfg.SessionSConns, utils.SessionSv1Ping, &utils.CGREvent{}, &reply); err != nil {
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return err
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}
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errChan := make(chan error)
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for connIdx, connCfg := range self.cfg.EvapiConns {
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if self.conns[connIdx], err = kamevapi.NewKamEvapi(connCfg.Address, connIdx, connCfg.Reconnects, connCfg.MaxReconnectInterval,
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utils.FibDuration, eventHandlers, utils.Logger); err != nil {
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return
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}
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go func(conn *kamevapi.KamEvapi) { // Start reading in own goroutine, return on error
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if err := conn.ReadEvents(); err != nil {
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errChan <- err
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}
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}(self.conns[connIdx])
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}
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err = <-errChan // Will keep the Connect locked until the first error in one of the connections
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return
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}
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func (self *KamailioAgent) Shutdown() (err error) {
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for conIndx, conn := range self.conns {
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if conn == nil {
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break
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}
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if err = conn.Disconnect(); err != nil {
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utils.Logger.Err(fmt.Sprintf("<%s> can't disconnect connection at index %v because: %s",
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utils.KamailioAgent, conIndx, err))
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continue
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}
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}
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return
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}
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// onCgrAuth is called when new event of type CGR_AUTH_REQUEST is coming
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func (ka *KamailioAgent) onCgrAuth(evData []byte, connIdx int) {
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if connIdx >= len(ka.conns) { // protection against index out of range panic
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err := fmt.Errorf("Index out of range[0,%v): %v ", len(ka.conns), connIdx)
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utils.Logger.Err(fmt.Sprintf("<%s> %s", utils.KamailioAgent, err.Error()))
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return
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}
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kev, err := NewKamEvent(evData, ka.cfg.EvapiConns[connIdx].Alias, ka.conns[connIdx].RemoteAddr().String())
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if err != nil {
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utils.Logger.Err(fmt.Sprintf("<%s> unmarshalling event data: %s, error: %s",
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utils.KamailioAgent, evData, err.Error()))
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return
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}
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if kev[utils.RequestType] == utils.MetaNone { // Do not process this request
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return
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}
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if kev.MissingParameter() {
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if kRply, err := kev.AsKamAuthReply(nil, nil, utils.ErrMandatoryIeMissing); err != nil {
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utils.Logger.Err(fmt.Sprintf("<%s> failed building auth reply for event: %s, error: %s",
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utils.KamailioAgent, kev[utils.OriginID], err.Error()))
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} else if err = ka.conns[connIdx].Send(kRply.String()); err != nil {
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utils.Logger.Err(fmt.Sprintf("<%s> failed sending auth reply for event: %s, error %s",
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utils.KamailioAgent, kev[utils.OriginID], err.Error()))
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}
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return
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}
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authArgs := kev.V1AuthorizeArgs()
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if authArgs == nil {
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utils.Logger.Err(fmt.Sprintf("<%s> event: %s cannot generate auth session arguments",
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utils.KamailioAgent, kev[utils.OriginID]))
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return
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}
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authArgs.CGREvent.Event[EvapiConnID] = connIdx // Attach the connection ID
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var authReply sessions.V1AuthorizeReply
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// take the error after calling SessionSv1.AuthorizeEvent
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// and send it as parameter to AsKamAuthReply
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err = ka.connMgr.Call(ka.ctx, ka.cfg.SessionSConns,
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utils.SessionSv1AuthorizeEvent,
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authArgs, &authReply)
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if kar, err := kev.AsKamAuthReply(authArgs, &authReply, err); err != nil {
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utils.Logger.Err(fmt.Sprintf("<%s> failed building auth reply for event: %s, error: %s",
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utils.KamailioAgent, kev[utils.OriginID], err.Error()))
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} else if err = ka.conns[connIdx].Send(kar.String()); err != nil {
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utils.Logger.Err(fmt.Sprintf("<%s> failed sending auth reply for event: %s, error: %s",
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utils.KamailioAgent, kev[utils.OriginID], err.Error()))
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}
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}
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func (ka *KamailioAgent) onCallStart(evData []byte, connIdx int) {
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if connIdx >= len(ka.conns) { // protection against index out of range panic
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err := fmt.Errorf("Index out of range[0,%v): %v ", len(ka.conns), connIdx)
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utils.Logger.Err(fmt.Sprintf("<%s> %s", utils.KamailioAgent, err.Error()))
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return
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}
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kev, err := NewKamEvent(evData, ka.cfg.EvapiConns[connIdx].Alias, ka.conns[connIdx].RemoteAddr().String())
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if err != nil {
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utils.Logger.Err(fmt.Sprintf("<%s> unmarshalling event: %s, error: %s",
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utils.KamailioAgent, evData, err.Error()))
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return
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}
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if kev[utils.RequestType] == utils.MetaNone { // Do not process this request
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return
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}
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if kev.MissingParameter() {
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ka.disconnectSession(connIdx,
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NewKamSessionDisconnect(kev[KamHashEntry], kev[KamHashID],
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utils.ErrMandatoryIeMissing.Error()))
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return
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}
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initSessionArgs := kev.V1InitSessionArgs()
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if initSessionArgs == nil {
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utils.Logger.Err(fmt.Sprintf("<%s> event: %s cannot generate init session arguments",
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utils.KamailioAgent, kev[utils.OriginID]))
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return
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}
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initSessionArgs.CGREvent.Event[EvapiConnID] = connIdx // Attach the connection ID so we can properly disconnect later
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var initReply sessions.V1InitSessionReply
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if err := ka.connMgr.Call(ka.ctx, ka.cfg.SessionSConns,
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utils.SessionSv1InitiateSession,
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initSessionArgs, &initReply); err != nil {
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utils.Logger.Err(
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fmt.Sprintf("<%s> could not process answer for event %s, error: %s",
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utils.KamailioAgent, kev[utils.OriginID], err.Error()))
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ka.disconnectSession(connIdx,
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NewKamSessionDisconnect(kev[KamHashEntry], kev[KamHashID],
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utils.ErrServerError.Error()))
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return
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}
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}
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func (ka *KamailioAgent) onCallEnd(evData []byte, connIdx int) {
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if connIdx >= len(ka.conns) { // protection against index out of range panic
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err := fmt.Errorf("Index out of range[0,%v): %v ", len(ka.conns), connIdx)
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utils.Logger.Err(fmt.Sprintf("<%s> %s", utils.KamailioAgent, err.Error()))
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return
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}
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kev, err := NewKamEvent(evData, ka.cfg.EvapiConns[connIdx].Alias, ka.conns[connIdx].RemoteAddr().String())
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if err != nil {
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utils.Logger.Err(fmt.Sprintf("<%s> unmarshalling event: %s, error: %s",
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utils.KamailioAgent, evData, err.Error()))
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return
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}
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if kev[utils.RequestType] == utils.MetaNone { // Do not process this request
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return
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}
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if kev.MissingParameter() {
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utils.Logger.Err(fmt.Sprintf("<%s> mandatory IE missing out from event: %s",
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utils.KamailioAgent, kev[utils.OriginID]))
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return
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}
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tsArgs := kev.V1TerminateSessionArgs()
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if tsArgs == nil {
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utils.Logger.Err(fmt.Sprintf("<%s> event: %s cannot generate terminate session arguments",
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utils.KamailioAgent, kev[utils.OriginID]))
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return
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}
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var reply string
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tsArgs.CGREvent.Event[EvapiConnID] = connIdx // Attach the connection ID in case we need to create a session and disconnect it
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if err := ka.connMgr.Call(ka.ctx, ka.cfg.SessionSConns,
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utils.SessionSv1TerminateSession,
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tsArgs, &reply); err != nil {
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utils.Logger.Err(
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fmt.Sprintf("<%s> could not terminate session with event %s, error: %s",
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utils.KamailioAgent, kev[utils.OriginID], err.Error()))
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// no return here since we want CDR anyhow
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}
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if ka.cfg.CreateCdr || strings.Contains(kev[utils.CGRFlags], utils.MetaCDRs) {
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if err := ka.connMgr.Call(ka.ctx, ka.cfg.SessionSConns,
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utils.SessionSv1ProcessCDR,
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tsArgs.CGREvent, &reply); err != nil {
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utils.Logger.Err(fmt.Sprintf("%s> failed processing CGREvent: %s, error: %s",
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utils.KamailioAgent, utils.ToJSON(tsArgs.CGREvent), err.Error()))
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}
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}
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}
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func (ka *KamailioAgent) onDlgList(evData []byte, connIdx int) {
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kamDlgRpl, err := NewKamDlgReply(evData)
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if err != nil {
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utils.Logger.Err(fmt.Sprintf("<%s> unmarshalling event data: %s, error: %s",
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utils.KamailioAgent, evData, err.Error()))
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return
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}
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var sIDs []*sessions.SessionID
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for _, dlgInfo := range kamDlgRpl.Jsonrpl_body.Result {
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originHost := ka.conns[connIdx].RemoteAddr().String()
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originID := dlgInfo.CallId + ";" + dlgInfo.Caller.Tag
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for _, variable := range dlgInfo.Variables {
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if variable.CgrOriginHost != utils.EmptyString {
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originHost = variable.CgrOriginHost
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}
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if variable.CgrOriginID != utils.EmptyString {
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originID = variable.CgrOriginID
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}
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}
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sIDs = append(sIDs, &sessions.SessionID{
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OriginHost: originHost,
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OriginID: originID,
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})
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}
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ka.activeSessionIDs <- sIDs
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}
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func (ka *KamailioAgent) onCgrProcessMessage(evData []byte, connIdx int) {
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if connIdx >= len(ka.conns) { // protection against index out of range panic
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err := fmt.Errorf("Index out of range[0,%v): %v ", len(ka.conns), connIdx)
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utils.Logger.Err(fmt.Sprintf("<%s> %s", utils.KamailioAgent, err.Error()))
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return
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}
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kev, err := NewKamEvent(evData, ka.cfg.EvapiConns[connIdx].Alias, ka.conns[connIdx].RemoteAddr().String())
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if err != nil {
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utils.Logger.Err(fmt.Sprintf("<%s> unmarshalling event data: %s, error: %s",
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utils.KamailioAgent, evData, err.Error()))
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return
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}
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if kev.MissingParameter() {
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if kRply, err := kev.AsKamProcessMessageReply(nil, nil, utils.ErrMandatoryIeMissing); err != nil {
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utils.Logger.Err(fmt.Sprintf("<%s> failed building process session event reply for event: %s, error: %s",
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utils.KamailioAgent, kev[utils.OriginID], err.Error()))
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} else if err = ka.conns[connIdx].Send(kRply.String()); err != nil {
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utils.Logger.Err(fmt.Sprintf("<%s> failed sending process session event reply for event: %s, error %s",
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utils.KamailioAgent, kev[utils.OriginID], err.Error()))
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}
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return
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}
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//in case that we don't receive cgr_flags from kamailio
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//we consider this as ping-pong event
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if _, has := kev[utils.CGRFlags]; !has {
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if err = ka.conns[connIdx].Send(kev.AsKamProcessMessageEmptyReply().String()); err != nil {
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utils.Logger.Err(fmt.Sprintf("<%s> failed sending empty process message reply for event: %s, error %s",
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utils.KamailioAgent, kev[utils.OriginID], err.Error()))
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}
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}
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procEvArgs := kev.V1ProcessMessageArgs()
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if procEvArgs == nil {
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utils.Logger.Err(fmt.Sprintf("<%s> event: %s cannot generate process message session arguments",
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utils.KamailioAgent, kev[utils.OriginID]))
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return
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}
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procEvArgs.CGREvent.Event[EvapiConnID] = connIdx // Attach the connection ID
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var processReply sessions.V1ProcessMessageReply
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err = ka.connMgr.Call(ka.ctx, ka.cfg.SessionSConns,
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utils.SessionSv1ProcessMessage,
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procEvArgs, &processReply)
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// take the error after calling SessionSv1.ProcessMessage
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// and send it as parameter to AsKamProcessMessageReply
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if kar, err := kev.AsKamProcessMessageReply(procEvArgs, &processReply, err); err != nil {
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utils.Logger.Err(fmt.Sprintf("<%s> failed building process session event reply for event: %s, error: %s",
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utils.KamailioAgent, kev[utils.OriginID], err.Error()))
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} else if err = ka.conns[connIdx].Send(kar.String()); err != nil {
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utils.Logger.Err(fmt.Sprintf("<%s> failed sending auth reply for event: %s, error: %s",
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utils.KamailioAgent, kev[utils.OriginID], err.Error()))
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}
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}
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func (ka *KamailioAgent) onCgrProcessCDR(evData []byte, connIdx int) {
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if connIdx >= len(ka.conns) { // protection against index out of range panic
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err := fmt.Errorf("Index out of range[0,%v): %v ", len(ka.conns), connIdx)
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utils.Logger.Err(fmt.Sprintf("<%s> %s", utils.KamailioAgent, err.Error()))
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return
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}
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kev, err := NewKamEvent(evData, ka.cfg.EvapiConns[connIdx].Alias, ka.conns[connIdx].RemoteAddr().String())
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if err != nil {
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utils.Logger.Err(fmt.Sprintf("<%s> unmarshalling event data: %s, error: %s",
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utils.KamailioAgent, evData, err.Error()))
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return
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}
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if kev.MissingParameter() {
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if kRply, err := kev.AsKamProcessCDRReply(nil, nil, utils.ErrMandatoryIeMissing); err != nil {
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utils.Logger.Err(fmt.Sprintf("<%s> failed building process session event reply for event: %s, error: %s",
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utils.KamailioAgent, kev[utils.OriginID], err.Error()))
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} else if err = ka.conns[connIdx].Send(kRply.String()); err != nil {
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utils.Logger.Err(fmt.Sprintf("<%s> failed sending process session event reply for event: %s, error %s",
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utils.KamailioAgent, kev[utils.OriginID], err.Error()))
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}
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return
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}
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procCDRArgs := kev.V1ProcessCDRArgs()
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if procCDRArgs == nil {
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utils.Logger.Err(fmt.Sprintf("<%s> event: %s cannot generate process cdr session arguments",
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utils.KamailioAgent, kev[utils.OriginID]))
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return
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}
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procCDRArgs.Event[EvapiConnID] = connIdx // Attach the connection ID
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var processReply string
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err = ka.connMgr.Call(ka.ctx, ka.cfg.SessionSConns,
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utils.SessionSv1ProcessCDR,
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procCDRArgs, &processReply)
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// take the error after calling SessionSv1.ProcessCDR
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// and send it as parameter to AsKamProcessCDRReply
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if kar, err := kev.AsKamProcessCDRReply(procCDRArgs, &processReply, err); err != nil {
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utils.Logger.Err(fmt.Sprintf("<%s> failed building process session event reply for event: %s, error: %s",
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utils.KamailioAgent, kev[utils.OriginID], err.Error()))
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} else if err = ka.conns[connIdx].Send(kar.String()); err != nil {
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utils.Logger.Err(fmt.Sprintf("<%s> failed sending auth reply for event: %s, error: %s",
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utils.KamailioAgent, kev[utils.OriginID], err.Error()))
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}
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}
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func (self *KamailioAgent) disconnectSession(connIdx int, dscEv *KamSessionDisconnect) (err error) {
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if err = self.conns[connIdx].Send(dscEv.String()); err != nil {
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utils.Logger.Err(fmt.Sprintf("<%s> failed sending disconnect request: %s, connection id: %v, error %s",
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utils.KamailioAgent, utils.ToJSON(dscEv), connIdx, err.Error()))
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}
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return
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}
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// Internal method to disconnect session in Kamailio
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func (ka *KamailioAgent) V1DisconnectSession(ctx *context.Context, cgrEv utils.CGREvent, reply *string) (err error) {
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hEntry := utils.IfaceAsString(cgrEv.Event[KamHashEntry])
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hID := utils.IfaceAsString(cgrEv.Event[KamHashID])
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connIdxIface, has := cgrEv.Event[EvapiConnID]
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if !has {
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utils.Logger.Err(
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fmt.Sprintf("<%s> error: <%s:%s> when attempting to disconnect <%s:%s> and <%s:%s>",
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|
utils.KamailioAgent, utils.ErrNotFound.Error(), EvapiConnID,
|
|
KamHashEntry, hEntry, KamHashID, hID))
|
|
return
|
|
}
|
|
connIdx, err := utils.IfaceAsTInt64(connIdxIface)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if int(connIdx) >= len(ka.conns) { // protection against index out of range panic
|
|
err = fmt.Errorf("Index out of range[0,%v): %v ", len(ka.conns), connIdx)
|
|
utils.Logger.Err(fmt.Sprintf("<%s> %s", utils.KamailioAgent, err.Error()))
|
|
return
|
|
}
|
|
if err = ka.disconnectSession(int(connIdx),
|
|
NewKamSessionDisconnect(hEntry, hID,
|
|
utils.ErrInsufficientCredit.Error())); err != nil {
|
|
return
|
|
}
|
|
*reply = utils.OK
|
|
return
|
|
}
|
|
|
|
// V1GetActiveSessionIDs returns a list of CGRIDs based on active sessions from agent
|
|
func (ka *KamailioAgent) V1GetActiveSessionIDs(ctx *context.Context, ignParam string, sessionIDs *[]*sessions.SessionID) (err error) {
|
|
kamEv := utils.ToJSON(map[string]string{utils.Event: CGR_DLG_LIST})
|
|
var sentDLG int
|
|
for i, evapi := range ka.conns {
|
|
if err := evapi.Send(kamEv); err != nil {
|
|
utils.Logger.Err(fmt.Sprintf("<%s> failed sending event to connIdx<%v>, error %s",
|
|
utils.KamailioAgent, i, err.Error()))
|
|
continue
|
|
}
|
|
sentDLG++
|
|
}
|
|
if sentDLG == 0 {
|
|
return
|
|
}
|
|
tm := time.NewTimer(config.CgrConfig().GeneralCfg().ReplyTimeout)
|
|
for i := 0; i < sentDLG; i++ {
|
|
select {
|
|
case sIDs := <-ka.activeSessionIDs:
|
|
*sessionIDs = append(*sessionIDs, sIDs...)
|
|
case <-tm.C:
|
|
return errors.New("timeout executing dialog list")
|
|
}
|
|
}
|
|
if len(*sessionIDs) == 0 {
|
|
return utils.ErrNoActiveSession
|
|
}
|
|
tm.Stop()
|
|
return
|
|
}
|
|
|
|
// Reload recreates the connection buffers
|
|
// only used on reload
|
|
func (ka *KamailioAgent) Reload() {
|
|
ka.conns = make([]*kamevapi.KamEvapi, len(ka.cfg.EvapiConns))
|
|
}
|
|
|
|
// V1AlterSession is used to implement the sessions.BiRPClient interface
|
|
func (*KamailioAgent) V1AlterSession(*context.Context, utils.CGREvent, *string) error {
|
|
return utils.ErrNotImplemented
|
|
}
|
|
|
|
// V1DisconnectPeer is used to implement the sessions.BiRPClient interface
|
|
func (*KamailioAgent) V1DisconnectPeer(*context.Context, *utils.DPRArgs, *string) error {
|
|
return utils.ErrNotImplemented
|
|
}
|
|
|
|
// V1WarnDisconnect is used to implement the sessions.BiRPClient interface
|
|
func (*KamailioAgent) V1WarnDisconnect(*context.Context, map[string]any, *string) error {
|
|
return utils.ErrNotImplemented
|
|
}
|