wasmer_wasix/syscalls/wasix/
sock_connect.rs

1use super::*;
2use crate::syscalls::*;
3
4/// ### `sock_connect()`
5/// Initiate a connection on a socket to the specified address
6///
7/// Polling the socket handle will wait for data to arrive or for
8/// the socket status to change which can be queried via 'sock_status'
9///
10/// Note: This is similar to `connect` in POSIX
11///
12/// ## Parameters
13///
14/// * `fd` - Socket descriptor
15/// * `addr` - Address of the socket to connect to
16#[instrument(level = "trace", skip_all, fields(%sock, addr = field::Empty), ret)]
17pub fn sock_connect<M: MemorySize>(
18    mut ctx: FunctionEnvMut<'_, WasiEnv>,
19    sock: WasiFd,
20    addr: WasmPtr<__wasi_addr_port_t, M>,
21) -> Result<Errno, WasiError> {
22    WasiEnv::do_pending_operations(&mut ctx)?;
23
24    let env = ctx.data();
25    let memory = unsafe { env.memory_view(&ctx) };
26    let addr = wasi_try_ok!(crate::net::read_ip_port(&memory, addr));
27    let peer_addr = SocketAddr::new(addr.0, addr.1);
28    Span::current().record("addr", format!("{peer_addr:?}"));
29
30    wasi_try_ok!(sock_connect_internal(&mut ctx, sock, peer_addr)?);
31
32    #[cfg(feature = "journal")]
33    if ctx.data().enable_journal {
34        let local_addr = wasi_try_ok!(__sock_actor(
35            &mut ctx,
36            sock,
37            Rights::empty(),
38            |socket, _| socket.addr_local()
39        ));
40        JournalEffector::save_sock_connect(&mut ctx, sock, local_addr, peer_addr).map_err(
41            |err| {
42                tracing::error!("failed to save sock_connected event - {}", err);
43                WasiError::Exit(ExitCode::from(Errno::Fault))
44            },
45        )?;
46    }
47
48    Ok(Errno::Success)
49}
50
51pub(crate) fn sock_connect_internal(
52    ctx: &mut FunctionEnvMut<'_, WasiEnv>,
53    sock: WasiFd,
54    addr: SocketAddr,
55) -> Result<Result<(), Errno>, WasiError> {
56    let env = ctx.data();
57    let net = env.net().clone();
58    let tasks = ctx.data().tasks().clone();
59    wasi_try_ok_ok!(__sock_upgrade(
60        ctx,
61        sock,
62        Rights::SOCK_CONNECT,
63        move |mut socket, flags| async move {
64            // Auto-bind UDP
65            socket = socket
66                .auto_bind_udp(tasks.deref(), net.deref())
67                .await?
68                .unwrap_or(socket);
69            socket
70                .connect(
71                    tasks.deref(),
72                    net.deref(),
73                    addr,
74                    None,
75                    flags.contains(Fdflags::NONBLOCK),
76                )
77                .await
78        }
79    ));
80
81    Ok(Ok(()))
82}
wasmer_wasix/syscalls/wasix/sock_connect.rs

wasmer_wasix/syscalls/wasix/
sock_connect.rs
