Protocols/OSCAR/Migration: Difference between revisions
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shutdown. Server can migrate whole connection or only several services. Migration | shutdown. Server can migrate whole connection or only several services. Migration | ||
always initiated by server. Server can abort migration sequence via | always initiated by server. Server can abort migration sequence via | ||
[[Protocols/OSCAR/ | [[Protocols/OSCAR/SNAC_01_0D|SNAC(01,0D)]] - server resume command. | ||
<br><br> | <br><br> | ||
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<tr> | <tr> | ||
<td bgcolor=#f9f9f9 width=35 valign=top> <b><<</b></td> | <td bgcolor=#f9f9f9 width=35 valign=top> <b><<</b></td> | ||
<td bgcolor=#f9f9f9 width=200 valign=top> <b>[[Protocols/OSCAR/ | <td bgcolor=#f9f9f9 width=200 valign=top> <b>[[Protocols/OSCAR/SNAC_01_0D|SNAC(01,0B)]]</b></td> | ||
<td bgcolor=#f9f9f9 valign=top> Server sends pause. Client should stop send snacs</td> | <td bgcolor=#f9f9f9 valign=top> Server sends pause. Client should stop send snacs</td> | ||
</tr> | </tr> | ||
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<tr> | <tr> | ||
<td bgcolor=#f9f9f9 valign=top> <b>>></b></td> | <td bgcolor=#f9f9f9 valign=top> <b>>></b></td> | ||
<td bgcolor=#f9f9f9 valign=top> <b>[[Protocols/OSCAR/ | <td bgcolor=#f9f9f9 valign=top> <b>[[Protocols/OSCAR/SNAC_01_0C|SNAC(01,0C)]]</b></td> | ||
<td bgcolor=#f9f9f9 valign=top> Client ack pause command</td> | <td bgcolor=#f9f9f9 valign=top> Client ack pause command</td> | ||
</tr> | </tr> | ||
Latest revision as of 12:11, 14 February 2021
| OSCAR Protocol |
| Introduction • Terms • Clients |
| Basic |
| Datatypes • FLAP • SNAC • TLV |
| UUIDs • Errors • Tool IDs |
| Host Interaction |
| Rate Limits • Migration • Messages |
| Other Services |
| ADMIN • ADVERT • ALERT |
| BART • BOS • BUCP • CHAT |
| CHAT_NAV |
| Tutorials |
| Sign On • BART • Rendezvous |
| ICBM • Locate • Buddies |
| Foodgroups |
| OSERVICE (0x0001) |
| LOCATE (0x0002) |
| BUDDY (0x0003) |
| ICBM (0x0004) |
| ADVERT (0x0005) |
| INVITE (0x0006) |
| ADMIN (0x0007) |
| POPUP (0x0008) |
| PD (0x0009) |
| USER_LOOKUP (0x000A) |
| STATS (0x000B) |
| TRANSLATE (0x000C) |
| CHAT_NAV (0x000D) |
| CHAT (0x000E) |
| ODIR (0x000F) |
| BART (0x0010) |
| FEEDBAG (0x0013) |
| ICQ (0x0015) |
| BUCP (0x0017) |
| ALERT (0x0018) |
| PLUGIN (0x0022) |
| UNNAMED_FG_24 (0x0024) |
| MDIR (0x0025) |
| ARS (0x044A) |
The NINA backend supports the concept of migration so we can perform maintenance to backend servers without effecting a user's sessions. The server will initiate the migration and tell the client it needs to migrate to a different server.
The client acknowledges that it is ready to be migrated to the server. The server then tells the client where to reconnect to start its session up again.
Migration SNACs
| Name | Subgroup | Origin | Description |
|---|---|---|---|
| OSERVICE__PAUSE_REQ | 0x000B | Host | This is sent by the server when it needs to migrate the client. |
| OSERVICE__PAUSE_ACK | 0x000C | Client | This is sent by the client to acknowledge the receipt and processing of a OSERVICE__PAUSE_REQ SNAC request. |
| OSERVICE__RESUME | 0x000D | Host | In certain situations the server may abort a migration after having told the client to PAUSE. |
| OSERVICE__MIGRATE_GROUPS | 0x0012 | Host | This SNAC commands the client to reconnect to the server specified by the included OSERVICE__TLV_TAGS_RECONNECT_HERE TLV. |
From Aleksandr Shutko: Various sequences in OSCAR protocol
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