Difference between revisions of "Sockets services"

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(GetAddrInfo)
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| 5 || GetGaiStringError
 
| 5 || GetGaiStringError
 
|-
 
|-
| 6 || GetAddrInfo
+
| 6 || [[#GetAddrInfo]]
 
|-
 
|-
 
| 7 || GetNameInfo
 
| 7 || GetNameInfo
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|}
 
|}
  
 +
=== GetAddrInfo ===
 +
 +
Takes three type 5 buffers (host, port, and hints), and a type 6 buffer (the output addrinfos). Also takes a u8 (padded to 4 bytes so the next raw parameter can align), a u32, and a u64. The u8 is a boolean for whether to enable "nsd resolve" (1) or not (0). Not sure what the u32 is. It seems to either come from a parameter to <tt>GetAddrInfo</tt> or be zero. The u64 is most likely a placeholder for the server to copy the PID into and should be zero. Both hints and the output buffer contain serialized addrinfo chains. The hints buffer is sized 0x400 bytes long by default, and the output buffer 0x1000 bytes.
 +
 +
=== Addrinfo Serialization Format ===
 +
 +
Each struct addrinfo in the linked list is serialized according to this format and then written to the buffer. All numbers are in network byte order.
 +
 +
{| class="wikitable" border="1"
 +
|-
 +
! Size (bytes) || Name || Notes
 +
|-
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| 4 || Magic || Needs to be 0xBEEFCAFE. Seriously.
 +
|-
 +
| 4 || ai_flags ||
 +
|-
 +
| 4 || ai_family ||
 +
|-
 +
| 4 || ai_socktype ||
 +
|-
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| 4 || ai_protocol ||
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|-
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| 4 || ai_addrlen ||
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|-
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| ai_addrlen ? ai_addrlen : 4 || ai_addr ||
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|-
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| null-terminated string || ai_canonname ||
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|}
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If <tt>ai_addrlen</tt> is zero, <tt>ai_addr</tt> will occupy 4 bytes.
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 +
{| class="wikitable" border="1"
 +
|-
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! Size (bytes) || Name || Notes
 +
|-
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| 4 || ai_addr
 +
|}
 +
 +
If <tt>ai_family</tt> is recognized as AF_INET6 (28) or AF_INET (2), <tt>ai_addr</tt> is read as <tt>struct sockaddr_in</tt> or <tt>struct sockaddr_in6</tt>. Otherwise, it's just read as <tt>u8[ai_addrlen]</tt>.
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The list should be terminated with a sentinel four-byte zero value.
  
 
= nsd:u / nsd:a =
 
= nsd:u / nsd:a =

Revision as of 01:06, 9 October 2017

bsd:u / bsd:s

Cmd Name
0 RegisterClient (Initialize)
1 StartMonitoring
2 Socket
3 SocketExempt
4 Open
5 Select
6 Poll
7 Sysctl
8 Recv
9 RecvFrom
10 Send
11 SendTo
12 Accept
13 Bind
14 Connect
15 GetPeerName
16 GetSockName
17 GetSockOpt
18 Listen
19 Ioctl
20 Fcntl
21 SetSockOpt
22 Shutdown
23 ShutdownAllSockets
24 Write
25 Read
26 Close
27 DuplicateSocket
28 GetResourceStatistics
29 [3.0.0+] RecvMMsg
30 [3.0.0+] SendMMsg


sfdnsres

Cmd Name
0 SetDnsAddressesPrivate
1 GetDnsAddressPrivate
2 GetHostByName
3 GetHostByAddr
4 GetHostStringError
5 GetGaiStringError
6 #GetAddrInfo
7 GetNameInfo
8 RequestCancelHandle
9 CancelSocketCall

GetAddrInfo

Takes three type 5 buffers (host, port, and hints), and a type 6 buffer (the output addrinfos). Also takes a u8 (padded to 4 bytes so the next raw parameter can align), a u32, and a u64. The u8 is a boolean for whether to enable "nsd resolve" (1) or not (0). Not sure what the u32 is. It seems to either come from a parameter to GetAddrInfo or be zero. The u64 is most likely a placeholder for the server to copy the PID into and should be zero. Both hints and the output buffer contain serialized addrinfo chains. The hints buffer is sized 0x400 bytes long by default, and the output buffer 0x1000 bytes.

Addrinfo Serialization Format

Each struct addrinfo in the linked list is serialized according to this format and then written to the buffer. All numbers are in network byte order.

Size (bytes) Name Notes
4 Magic Needs to be 0xBEEFCAFE. Seriously.
4 ai_flags
4 ai_family
4 ai_socktype
4 ai_protocol
4 ai_addrlen
ai_addrlen ? ai_addrlen : 4 ai_addr
null-terminated string ai_canonname

If ai_addrlen is zero, ai_addr will occupy 4 bytes.

Size (bytes) Name Notes
4 ai_addr

If ai_family is recognized as AF_INET6 (28) or AF_INET (2), ai_addr is read as struct sockaddr_in or struct sockaddr_in6. Otherwise, it's just read as u8[ai_addrlen].

The list should be terminated with a sentinel four-byte zero value.

nsd:u / nsd:a

Cmd Name
10 GetSettingName
11 GetEnvironmentIdentifier
12 GetDeviceId
13 DeleteSettings
14 ImportSettings
20 Resolve
21 ResolveEx
30 GetNasServiceSetting
31 GetNasServiceSettingEx
40 GetNasRequestFqdn
41 GetNasRequestFqdnEx
42 GetNasApiFqdn
43 GetNasApiFqdnEx
50 GetCurrentSetting
60 ReadSaveDataFromFsForTest
61 WriteSaveDataToFsForTest
62 DeleteSaveDataOfFsForTest