https://tools.ietf.org/html/rfc3665
개인 정리용이므로
아래의 내용보다는 위의 출처의 글을 보는것이
더 도움이 될 수 있다.
실제 통신이 이루어지는 흐름
다수의 SIP Proxy 서버를 거치고, 다수의 도메인을 거쳐서 통신이 이루어짐
2.1. Successful New Registration
Bob SIP Server
| |
| REGISTER F1 |
|------------------------------>|
| 401 Unauthorized F2 |
|<------------------------------|
| REGISTER F3 |
|------------------------------>|
| 200 OK F4 |
|<------------------------------|
| |
2.2. Update of Contact List
Bob SIP Server
| |
| REGISTER F1 |
|------------------------------>|
| 200 OK F2 |
|<------------------------------|
| |
2.3. Request for Current Contact List
Bob SIP Server
| |
| REGISTER F1 |
|------------------------------>|
| 200 OK F2 |
|<------------------------------|
| |
2.4. Cancellation of Registration
Bob SIP Server
| |
| REGISTER F1 |
|------------------------------>|
| 200 OK F2 |
|<------------------------------|
| |2.5. Unsuccessful Registration
Bob SIP Server
| |
| REGISTER F1 |
|------------------------------>|
| 401 Unauthorized F2 |
|<------------------------------|
| REGISTER F3 |
|------------------------------>|
| 401 Unauthorized F4 |
|<------------------------------|
| |3.1. Successful Session Establishment
Alice Bob
| |
| INVITE F1 |
|----------------------->|
| 180 Ringing F2 |
|<-----------------------|
| |
| 200 OK F3 |
|<-----------------------|
| ACK F4 |
|----------------------->|
| Both Way RTP Media |
|<======================>|
| |
| BYE F5 |
|<-----------------------|
| 200 OK F6 |
|----------------------->|
| |3.2. Session Establishment Through Two Proxies
Alice Proxy 1 Proxy 2 Bob
| | | |
| INVITE F1 | | |
|--------------->| | |
| 407 F2 | | |
|<---------------| | |
| ACK F3 | | |
|--------------->| | |
| INVITE F4 | | |
|--------------->| INVITE F5 | |
| 100 F6 |--------------->| INVITE F7 |
|<---------------| 100 F8 |--------------->|
| |<---------------| |
| | | 180 F9 |
| | 180 F10 |<---------------|
| 180 F11 |<---------------| |
|<---------------| | 200 F12 |
| | 200 F13 |<---------------|
| 200 F14 |<---------------| |
|<---------------| | |
| ACK F15 | | |
|--------------->| ACK F16 | |
| |--------------->| ACK F17 |
| | |--------------->|
| Both Way RTP Media |
|<================================================>|
| | | BYE F18 |
| | BYE F19 |<---------------|
| BYE F20 |<---------------| |
|<---------------| | |
| 200 F21 | | |
|--------------->| 200 F22 | |
| |--------------->| 200 F23 |
| | |--------------->|
| | | |3.3. Session with Multiple Proxy Authentication
Alice Proxy 1 Proxy 2 Bob
| | | |
| INVITE F1 | | |
|----------->| | |
| 407 Proxy Authorization Required F2 |
|<-----------| | |
| ACK F3 | | |
|----------->| | |
| INVITE F4 | | |
|----------->| | |
| 100 F5 | | |
|<-----------| INVITE F6 | |
| |---------->| |
| | 407 Proxy Authorization Required F7
| |<----------| |
| | ACK F8 | |
| |---------->| |
| 407 Proxy Authorization Required F9 |
|<-----------| | |
| ACK F10 | | |
|----------->| | |
| INVITE F11| | |
|----------->| | |
| 100 F12 | | |
|<-----------| INVITE F13| |
| |---------->| |
| | 100 F14 | |
| |<----------| INVITE F15 |
| | |------------>|
| | | 200 OK F16 |
| | 200 OK F17|<------------|
| 200 OK F18 |<----------| |
|<-----------| | |
| ACK F19 | | |
|----------->| ACK F20 | |
| |---------->| ACK F21 |
| | |------------>|
| RTP Media Path |
|<====================================>|
3.4. Successful Session with Proxy Failure
Alice Proxy 1 Proxy 2 Bob
| | | |
| INVITE F1 | | |
|--------------->| | |
| INVITE F2 | | |
|--------------->| | |
| INVITE F3 | | |
|--------------->| | |
| INVITE F4 | | |
|--------------->| | |
| INVITE F5 | | |
|--------------->| | |
| INVITE F6 | | |
|--------------->| | |
| INVITE F7 | | |
|--------------->| | |
| INVITE F8 | |
|-------------------------------->| |
| 407 F9 | |
|<--------------------------------| |
| ACK F10 | |
|-------------------------------->| |
| INVITE F11 | |
|-------------------------------->| INVITE F12 |
| 100 F13 |--------------->|
|<--------------------------------| |
| | 180 F14 |
| 180 F15 |<---------------|
|<--------------------------------| |
| | 200 F16 |
| 200 F17 |<---------------|
|<--------------------------------| |
| ACK F18 | |
|-------------------------------->| ACK F19 |
| |--------------->|
| Both Way RTP Media |
|<================================================>|
| | BYE F20 |
| BYE F21 |<---------------|
|<--------------------------------| |
| 200 F22 | |
|-------------------------------->| 200 F23 |
| |--------------->|
| | |
3.5. Session Through a SIP ALG (Application Layer Gateway)
Alice ALG Proxy 2 Bob
| | | |
| INVITE F1 | | |
|--------------->| INVITE F2 | |
| 100 F3 |--------------->| INVITE F4 |
|<---------------| 100 F5 |--------------->|
| |<---------------| 180 F6 |
| | 180 F7 |<---------------|
| 180 F8 |<---------------| |
|<---------------| | 200 F9 |
| | 200 F10 |<---------------|
| 200 F11 |<---------------| |
|<---------------| |
| ACK F12 | |
|--------------->| ACK F13 |
| |-------------------------------->|
| RTP Media | Both Way RTP Media |
|<==============>|<===============================>|
| BYE F14 | |
|--------------->| BYE F15 |
| |-------------------------------->|
| | 200 F16 |
| 200 F17 |<--------------------------------|
|<---------------| |
| | |
3.6. Session via Redirect and Proxy Servers with SDP in ACK
Alice Redirect Server Proxy 3 Bob
| | | |
| INVITE F1 | | |
|--------------->| | |
| 302 F2 | | |
|<---------------| | |
| ACK F3 | | |
|--------------->| | |
| INVITE F4 | |
|-------------------------------->| INVITE F5 |
| 100 F6 |--------------->|
|<--------------------------------| 180 F7 |
| 180 F8 |<---------------|
|<--------------------------------| |
| | 200 F9 |
| 200 F10 |<---------------|
|<--------------------------------| |
| ACK F11 | |
|-------------------------------->| ACK F12 |
| |--------------->|
| Both Way RTP Media |
|<================================================>|
| | BYE F13 |
| BYE F14 |<---------------|
|<--------------------------------| |
| 200 F15 | |
|-------------------------------->| 200 F16 |
| |--------------->|
| | |3.7. Session with re-INVITE (IP Address Change)
Alice Proxy 2 Bob
| F1 INVITE | |
|------------------->| F2 INVITE |
| F3 100 Trying |------------------->|
|<-------------------| F4 180 Ringing |
| F5 180 Ringing |<-------------------|
|<-------------------| |
| | F6 200 OK |
| F7 200 OK |<-------------------|
|<-------------------| |
| F8 ACK |
|---------------------------------------->|
| Both Way RTP Media Established |
|<=======================================>|
| |
| Bob changes IP address |
| |
| F9 INVITE |
|<----------------------------------------|
| F10 200 OK |
|---------------------------------------->|
| F11 ACK |
|<----------------------------------------|
| New RTP Media Stream |
|<=======================================>|
| F12 BYE |
|---------------------------------------->|
| F13 200 OK |
|<----------------------------------------|
| |3.8. Unsuccessful No Answer
Alice Proxy 1 Proxy 2 Bob
| | | |
| INVITE F1 | | |
|--------------->| INVITE F2 | |
| 100 F3 |--------------->| INVITE F4 |
|<---------------| 100 F5 |--------------->|
| |<---------------| |
| | | 180 F6 |
| | 180 F7 |<---------------|
| 180 F8 |<---------------| |
|<---------------| | |
| CANCEL F9 | | |
|--------------->| | |
| 200 F10 | | |
|<---------------| CANCEL F11 | |
| |--------------->| |
| | 200 F12 | |
| |<---------------| |
| | | CANCEL F13 |
| | |--------------->|
| | | 200 F14 |
| | |<---------------|
| | | 487 F15 |
| | |<---------------|
| | | ACK F16 |
| | 487 F17 |--------------->|
| |<---------------| |
| | ACK F18 | |
| 487 F19 |--------------->| |
|<---------------| | |
| ACK F20 | | |
|--------------->| | |
| | | |
3.9. Unsuccessful Busy
Alice Proxy 1 Proxy 2 Bob
| | | |
| INVITE F1 | | |
|--------------->| INVITE F2 | |
| 100 F3 |--------------->| INVITE F4 |
|<---------------| 100 F5 |--------------->|
| |<---------------| |
| | | 486 F6 |
| | |<---------------|
| | | ACK F7 |
| | 486 F8 |--------------->|
| |<---------------| |
| | ACK F9 | |
| 486 F10 |--------------->| |
|<---------------| | |
| ACK F11 | | |
|--------------->| | |
| | | |
3.10. Unsuccessful No Response from User Agent
Alice Proxy 1 Proxy 2 Bob
| | | |
| INVITE F1 | | |
|--------------->| INVITE F2 | |
| 100 F3 |--------------->| INVITE F4 |
|<---------------| 100 F5 |--------------->|
| |<---------------| INVITE F6 |
| | |--------------->|
| | | INVITE F7 |
| | |--------------->|
| | | INVITE F8 |
| | |--------------->|
| | | INVITE F9 |
| | |--------------->|
| | | INVITE F10 |
| | |--------------->|
| | | INVITE F11 |
| | 480 F12 |--------------->|
| |<---------------| |
| | ACK F13 | |
| 480 F14 |--------------->| |
|<---------------| | |
| ACK F15 | | |
|--------------->| | |
| | | |
3.11. Unsuccessful Temporarily Unavailable
Alice Proxy 1 Proxy 2 Bob
| | | |
| INVITE F1 | | |
|--------------->| INVITE F2 | |
| 100 F3 |--------------->| INVITE F4 |
|<---------------| 100 F5 |--------------->|
| |<---------------| 180 F6 |
| | 180 F7 |<---------------|
| 180 F8 |<---------------| |
|<---------------| | 480 F9 |
| | |<---------------|
| | | ACK F10 |
| | 480 F11 |--------------->|
| |<---------------| |
| | ACK F12 | |
| 480 F13 |--------------->| |
|<---------------| | |
| ACK F14 | | |
|--------------->| | |
| | | |
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