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Initial implementation of outbound calls.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,130 @@ | ||
| // Copyright 2023 LiveKit, Inc. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package sip | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "sync" | ||
|
|
||
| "github.com/emiago/sipgo" | ||
| "github.com/livekit/protocol/rpc" | ||
| "golang.org/x/exp/maps" | ||
|
|
||
| "github.com/livekit/sip/pkg/config" | ||
| ) | ||
|
|
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| type Client struct { | ||
| conf *config.Config | ||
|
|
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| sipCli *sipgo.Client | ||
| publicIp string | ||
|
|
||
| cmu sync.RWMutex | ||
| activeCalls map[string]*outboundCall | ||
| } | ||
|
|
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| func NewClient(conf *config.Config) *Client { | ||
| c := &Client{ | ||
| conf: conf, | ||
| publicIp: getPublicIP(), | ||
| activeCalls: make(map[string]*outboundCall), | ||
| } | ||
| return c | ||
| } | ||
|
|
||
| func (c *Client) Start() error { | ||
| ua, err := sipgo.NewUA( | ||
| sipgo.WithUserAgent(userAgent), | ||
| ) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| c.sipCli, err = sipgo.NewClient(ua, sipgo.WithClientHostname(c.publicIp)) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| // FIXME: read existing SIP participants from the store? | ||
| return nil | ||
| } | ||
|
|
||
| func (c *Client) Stop() error { | ||
| c.cmu.Lock() | ||
| calls := maps.Values(c.activeCalls) | ||
| c.activeCalls = make(map[string]*outboundCall) | ||
| c.cmu.Unlock() | ||
| for _, call := range calls { | ||
| call.Close() | ||
| } | ||
| if c.sipCli != nil { | ||
| c.sipCli.Close() | ||
| c.sipCli = nil | ||
| } | ||
| // FIXME: anything else? | ||
| return nil | ||
| } | ||
|
|
||
| func (c *Client) UpdateSIPParticipant(ctx context.Context, req *rpc.InternalUpdateSIPParticipantRequest) (*rpc.InternalUpdateSIPParticipantResponse, error) { | ||
| if req.CallTo == "" { | ||
| // Disconnect participant | ||
| if call := c.getCall(req.ParticipantId); call != nil { | ||
| call.Close() | ||
| } | ||
| return &rpc.InternalUpdateSIPParticipantResponse{}, nil | ||
| } | ||
| err := c.getOrCreateCall(req.ParticipantId).Update(ctx, sipOutboundConfig{ | ||
| address: req.Address, | ||
| from: req.Number, | ||
| to: req.CallTo, | ||
| user: req.Username, | ||
| pass: req.Password, | ||
| }, lkRoomConfig{ | ||
| roomName: req.RoomName, | ||
| identity: req.ParticipantIdentity, | ||
| }) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return &rpc.InternalUpdateSIPParticipantResponse{}, nil | ||
| } | ||
|
|
||
| func (c *Client) UpdateSIPParticipantAffinity(ctx context.Context, req *rpc.InternalUpdateSIPParticipantRequest) float32 { | ||
| call := c.getCall(req.ParticipantId) | ||
| if call != nil { | ||
| return 1 // Existing participant | ||
| } | ||
| // TODO: scale affinity based on a number or active calls? | ||
| return 0.5 | ||
| } | ||
|
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| func (c *Client) SendSIPParticipantDTMF(ctx context.Context, req *rpc.InternalSendSIPParticipantDTMFRequest) (*rpc.InternalSendSIPParticipantDTMFResponse, error) { | ||
| call := c.getCall(req.ParticipantId) | ||
| if call == nil { | ||
| return nil, fmt.Errorf("Cannot send DTMF: participant not connected.") | ||
| } | ||
| if err := call.SendDTMF(ctx, req.Digits); err != nil { | ||
| return nil, err | ||
| } | ||
| return &rpc.InternalSendSIPParticipantDTMFResponse{}, nil | ||
| } | ||
|
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| func (c *Client) SendSIPParticipantDTMFAffinity(ctx context.Context, req *rpc.InternalSendSIPParticipantDTMFRequest) float32 { | ||
| call := c.getCall(req.ParticipantId) | ||
| if call != nil { | ||
| return 1 // Only existing participants | ||
| } | ||
| return 0 | ||
| } |
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