Online Play is a functionality of the Nintendo 3DS to play games online with other people.
Connection #
First a connection to nasc.nintendowifi.net is established and the resource /ac is requested with the POST method to get the actual address of the game server and a ticket for authentication on the game server. A typical request to nasc.nintendowifi.net/ac has this format:
Header:
POST https://nasc.nintendowifi.net/ac HTTP/1.1
Host: nasc.nintendowifi.net
X-GameId: 00003200
User-Agent: CTR FPD/000F
Content-Type: application/x-www-form-urlencoded
Content-Type: application/x-www-form-urlencoded
Content-Length: 841
Body:
gameid=MDAwMDMyMDA%2A&sdkver=MDAwMDAw&titleid=MDAwNDAxMzAwMDAwMzIwMg%2A%2A&gamecd=LS0tLQ%2A%2A&gamever=MDAxNA%2A%2A&mediatype=MA%2A%2A&makercd=MDA%2A&unitcd=Mg%2A%2A&macadr=MTEyMjMzNDQ1NTY2&bssid=MTEyMjMzYWFiYmNj&apinfo=MDQ6MDAwMDAwMDAwMA%2A%2A&fcdcert=<base64 encoded fcdcert>&devname=<base64 encoded name of the console (utf-16)>&servertype=TDE%2A&fpdver=MDAwRg%2A%2A&devtime=MjEwMTAxMjAyNjAx&lang=MDE%2A®ion=MDI%2A&csnum=<base64 encoded serial number of the 3DS system wihtout check number>&uidhmac=<base64 encoded of ?>&userid=<base64 encoded Nex [[Principal_ID|Principal ID]]>&action=TE9HSU4%2A&ingamesn=
| Key | Value | Value decoded | Notes |
|---|---|---|---|
| gameid | MDAwMDMyMDA* | 00003200 | |
| sdkver | MDAwMDAw | 000000 | |
| titleid | MDAwNDAxMzAwMDAwMzIwMg** | 0004013000003202 | |
| gamecd | LS0tLQ** | —- | |
| gamever | MDAxNA** | 0014 | |
| mediatype | MA** | 0 | |
| makercd | MDA* | 00 | |
| unitcd | Mg** | 2 | |
| macadr | MTEyMjMzNDQ1NTY2 | 112233445566 | MAC address of the console. Only the digits |
| bssid | MTEyMjMzYWFiYmNj | 112233aabbcc | |
| apinfo | MDQ6MDAwMDAwMDAwMA** | 04:0000000000 | |
| fcdcert | |||
| devname | Name of the console in UTF-16 | ||
| servertype | TDE* | L1 | |
| fpdver | MDAwRg** | 000F | |
| devtime | MjEwMTAxMDkyMDMx | 210101092031 | |
| lang | MDE* | 01 | |
| region | MDE* | 01 | |
| csnum | Q0VGMTIzNDU2Nzg* | CEF12345678 | Serial number of the device without the check digit |
| uidhmac | MGFmODZmYmQ* | 0af86fbd | |
| userid | MTIzNDU2Nzg5MA** | 1234567890 | Nex Principal ID |
| action | TE9HSU4* | LOGIN | |
| ingamesn | empty | empty |
Typical response to the above request:
Header:
HTTP/1.1 200 OK
NODE: pd42wfiap02
Content-Type: text/plain;charset=ISO-8859-1
Content-Length: 252
Date: Fri, 01 Jan 2021 09:20:55 GMT
Server: Nintendo Wii (http)
Body:
locator=MzQuMjExLjIzNS4xMzU6NjAwMDA*&retry=MA**&returncd=MDAx&token=<Token for authentication on the game server>&datetime=MjAyMTAxMDEwOTIwNTU*
| Key | Value | Value decoded | Notes |
|---|---|---|---|
| locator | MzQuMjExLjIzNS4xMzU6NjAwMDA* | 34.211.235.135:60000 | IP address and port of the game server |
| retry | MA** | 0 | |
| returncd | MDAx | 001 | 001 for success. 119 if there is an update required |
| token | Token for authentication on the game server. This token cannot be verified by the Nintendo 3DS | ||
| datetime | MjAyMTAxMDEwOTIwNTU* | 20210101092055 |
If there is an error (returncd is not 001) no locator and token is send
Game Server Informations #
| Game | build name |
|---|---|
| Kid Icarus Uprising | branch:akd_server build:2_25_10595_1 |
| Mario Kart 7 | branch:origin/project/appsp build:3_4_17_3 |
| Pokemon X/Y OR/AS | branch:origin/project/appsg build:3_3_15_6_0 |
| Metroid Prime Federation Force | branch:origin/release/ngs/3.9.x.200x build:3_9_21_2005_0 |
| Luigi’s Mansion 2 | branch:origin/release/ngs/3.4.x.3 build:3_4_16_3_0 |
| The Legend of Zelda: Tri Force Heroes | branch:origin/release/ngs/3.9.x.200x build:3_9_21_2005_0 |
| Pokemon Bank | branch:origin/project/ctr-jtta build:3_4_13_16_0 |
| Nintendo Badge Arcade | branch:origin/project/ctr-jwv build:3_7_16_2006_0 |
| Pokemon Sun/Moon US/UM | branch:origin/project/ctr-a2a build:3_10_23_3112_0 |