Difference between revisions of "Sockets services"
(Document SocketExempt, sysctl, ioctl, fcntl + some refactoring) |
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| 1 || StartMonitoring | | 1 || StartMonitoring | ||
|- | |- | ||
− | | 2 || Socket | + | | 2 || [[#Socket]] |
|- | |- | ||
− | | 3 || [[#SocketExempt]] | + | | 3 || [[#Socket||#SocketExempt]] |
|- | |- | ||
| 4 || [[#Open]] | | 4 || [[#Open]] | ||
Line 103: | Line 103: | ||
} | } | ||
− | == | + | == Socket == |
− | + | FreeBSD's <code>socket</code> command. | |
+ | <code>bsd:u</code> disallows the usage of the <code>SOCK_SEQPACKET</code> and <code>SOCK_RAW</code> types, with the exception of <code>(AF_INET, SOCK_RAW, IPPROTO_ICMP)</code> (IPv4 <code>ping</code>), <code>bsd:s</code> needs to be used for those. | ||
− | + | The only implemented domains are <code>AF_INET</code> and <code>AF_INET6</code>. | |
+ | |||
+ | SocketExempt: same as socket but the socket is immediately shutdown (disconnected) on creation. | ||
== Open == | == Open == |
Revision as of 14:48, 24 January 2018
bsd:u / bsd:s
This is "nn::socket::sf::IClient".
Cmd | Name | |
---|---|---|
0 | RegisterClient (Initialize) | |
1 | StartMonitoring | |
2 | #Socket | |
3 | [[#Socket | #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 |
Initalize
Takes a #BsdBufferConfig (made-up name), the PID, the size of the transfer memory and a copy-handle of the latter.
BsdBufferConfig
/// Configuration structure for bsdInitalize typedef struct { u32 version; ///< Observed 1 on 2.0 LibAppletWeb, 2 on 3.0. u32 tcp_tx_buf_size; ///< Size of the TCP transfer (send) buffer (initial or fixed). u32 tcp_rx_buf_size; ///< Size of the TCP recieve buffer (initial or fixed). u32 tcp_tx_buf_max_size; ///< Maximum size of the TCP transfer (send) buffer. If it is 0, the size of the buffer is fixed to its initial value. u32 tcp_rx_buf_max_size; ///< Maximum size of the TCP receive buffer. If it is 0, the size of the buffer is fixed to its initial value. u32 udp_tx_buf_size; ///< Size of the UDP transfer (send) buffer (typically 0x2400 bytes). u32 udp_rx_buf_size; ///< Size of the UDP receive buffer (typically 0xA500 bytes). u32 sb_efficiency; ///< Number of buffers for each socket (standard values range from 1 to 8). } BsdBufferConfig;
The transfer memory must be larger than a the computed size below. Should the transfer memory be smaller than that, the BSD sockets service would only send ZeroWindow packets (for TCP), resulting in a transfer rate not exceeding 1 byte/s.
static size_t _bsdGetTransferMemSizeForBufferConfig(const BsdBufferConfig *config) { u32 tcp_tx_buf_max_size = config->tcp_tx_buf_max_size != 0 ? config->tcp_tx_buf_max_size : config->tcp_tx_buf_size; u32 tcp_rx_buf_max_size = config->tcp_rx_buf_max_size != 0 ? config->tcp_rx_buf_max_size : config->tcp_rx_buf_size; u32 sum = tcp_tx_buf_max_size + tcp_rx_buf_max_size + config->udp_tx_buf_size + config->udp_rx_buf_size; sum = ((sum + 0xFFF) >> 12) << 12; // page round-up return (size_t)(config->sb_efficiency * sum); }
Socket
FreeBSD's socket
command.
bsd:u
disallows the usage of the SOCK_SEQPACKET
and SOCK_RAW
types, with the exception of (AF_INET, SOCK_RAW, IPPROTO_ICMP)
(IPv4 ping
), bsd:s
needs to be used for those.
The only implemented domains are AF_INET
and AF_INET6
.
SocketExempt: same as socket but the socket is immediately shutdown (disconnected) on creation.
Open
FreeBSD's open
command, limited to opening /dev/bpf
. This can be used, for example, to enable promiscuous mode, see FreeBSD's /dev/bpf
for more details.
Sysctl
This command is exclusive to bsd:s
(FIXME: test whether this is actually the case).
FreeBSD's sysctl
command, restricted to CTL_NET
(?).
Ioctl
FreeBSD's ioctl
function. The following ioctls are implemented, refer to FreeBSD's headers for more details: SIOCATMARK, BIOCGBLEN, BIOCIMMEDIATE, BIOCSETIF, SIOCGETSGCNT, SIOCGIFMETRIC, SIOCSIFMETRIC SIOCDIFADDR, SIOCGIFINDEX, SIOCGIFADDR, SIOCGIFCONF, SIOCGIFNETMASK, SIOCGIFMTU, SIOCSIFMTU, SIOCGIFMEDIA, SIOCSIFLLADDR and SIOCGIFXMEDIA.
Fcntl
FreeBSD's fcntl
, limited to F_GETFL
and F_SETFL
with O_NONBLOCK
.
sfdnsres
This is "nn::socket::resolver::IResolver".
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
This is "nn::nsd::detail::IManager".
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 |