diff options
Diffstat (limited to 'library/std/src/sys/net/connection/socket/mod.rs')
| -rw-r--r-- | library/std/src/sys/net/connection/socket/mod.rs | 854 |
1 files changed, 854 insertions, 0 deletions
diff --git a/library/std/src/sys/net/connection/socket/mod.rs b/library/std/src/sys/net/connection/socket/mod.rs new file mode 100644 index 00000000000..564f2e3a01f --- /dev/null +++ b/library/std/src/sys/net/connection/socket/mod.rs @@ -0,0 +1,854 @@ +#[cfg(test)] +mod tests; + +use crate::ffi::{c_int, c_void}; +use crate::io::{self, BorrowedCursor, ErrorKind, IoSlice, IoSliceMut}; +use crate::net::{ + Ipv4Addr, Ipv6Addr, Shutdown, SocketAddr, SocketAddrV4, SocketAddrV6, ToSocketAddrs, +}; +use crate::sys::common::small_c_string::run_with_cstr; +use crate::sys::net::connection::each_addr; +use crate::sys_common::{AsInner, FromInner}; +use crate::time::Duration; +use crate::{cmp, fmt, mem, ptr}; + +cfg_select! { + target_os = "hermit" => { + mod hermit; + pub use hermit::*; + } + target_os = "solid_asp3" => { + mod solid; + pub use solid::*; + } + target_family = "unix" => { + mod unix; + pub use unix::*; + } + all(target_os = "wasi", target_env = "p2") => { + mod wasip2; + pub use wasip2::*; + } + target_os = "windows" => { + mod windows; + pub use windows::*; + } + _ => {} +} + +use netc as c; + +cfg_select! { + any( + target_os = "dragonfly", + target_os = "freebsd", + target_os = "openbsd", + target_os = "netbsd", + target_os = "illumos", + target_os = "solaris", + target_os = "haiku", + target_os = "l4re", + target_os = "nto", + target_os = "nuttx", + target_vendor = "apple", + ) => { + use c::IPV6_JOIN_GROUP as IPV6_ADD_MEMBERSHIP; + use c::IPV6_LEAVE_GROUP as IPV6_DROP_MEMBERSHIP; + } + _ => { + use c::IPV6_ADD_MEMBERSHIP; + use c::IPV6_DROP_MEMBERSHIP; + } +} + +cfg_select! { + any( + target_os = "linux", target_os = "android", + target_os = "hurd", + target_os = "dragonfly", target_os = "freebsd", + target_os = "openbsd", target_os = "netbsd", + target_os = "solaris", target_os = "illumos", + target_os = "haiku", target_os = "nto", + target_os = "cygwin", + ) => { + use libc::MSG_NOSIGNAL; + } + _ => { + const MSG_NOSIGNAL: c_int = 0x0; + } +} + +cfg_select! { + any( + target_os = "dragonfly", target_os = "freebsd", + target_os = "openbsd", target_os = "netbsd", + target_os = "solaris", target_os = "illumos", + target_os = "nto", + ) => { + use crate::ffi::c_uchar; + type IpV4MultiCastType = c_uchar; + } + _ => { + type IpV4MultiCastType = c_int; + } +} + +//////////////////////////////////////////////////////////////////////////////// +// address conversions +//////////////////////////////////////////////////////////////////////////////// + +fn ip_v4_addr_to_c(addr: &Ipv4Addr) -> c::in_addr { + // `s_addr` is stored as BE on all machines and the array is in BE order. + // So the native endian conversion method is used so that it's never swapped. + c::in_addr { s_addr: u32::from_ne_bytes(addr.octets()) } +} + +fn ip_v6_addr_to_c(addr: &Ipv6Addr) -> c::in6_addr { + c::in6_addr { s6_addr: addr.octets() } +} + +fn ip_v4_addr_from_c(addr: c::in_addr) -> Ipv4Addr { + Ipv4Addr::from(addr.s_addr.to_ne_bytes()) +} + +fn ip_v6_addr_from_c(addr: c::in6_addr) -> Ipv6Addr { + Ipv6Addr::from(addr.s6_addr) +} + +fn socket_addr_v4_to_c(addr: &SocketAddrV4) -> c::sockaddr_in { + c::sockaddr_in { + sin_family: c::AF_INET as c::sa_family_t, + sin_port: addr.port().to_be(), + sin_addr: ip_v4_addr_to_c(addr.ip()), + ..unsafe { mem::zeroed() } + } +} + +fn socket_addr_v6_to_c(addr: &SocketAddrV6) -> c::sockaddr_in6 { + c::sockaddr_in6 { + sin6_family: c::AF_INET6 as c::sa_family_t, + sin6_port: addr.port().to_be(), + sin6_addr: ip_v6_addr_to_c(addr.ip()), + sin6_flowinfo: addr.flowinfo(), + sin6_scope_id: addr.scope_id(), + ..unsafe { mem::zeroed() } + } +} + +fn socket_addr_v4_from_c(addr: c::sockaddr_in) -> SocketAddrV4 { + SocketAddrV4::new(ip_v4_addr_from_c(addr.sin_addr), u16::from_be(addr.sin_port)) +} + +fn socket_addr_v6_from_c(addr: c::sockaddr_in6) -> SocketAddrV6 { + SocketAddrV6::new( + ip_v6_addr_from_c(addr.sin6_addr), + u16::from_be(addr.sin6_port), + addr.sin6_flowinfo, + addr.sin6_scope_id, + ) +} + +/// A type with the same memory layout as `c::sockaddr`. Used in converting Rust level +/// SocketAddr* types into their system representation. The benefit of this specific +/// type over using `c::sockaddr_storage` is that this type is exactly as large as it +/// needs to be and not a lot larger. And it can be initialized more cleanly from Rust. +#[repr(C)] +union SocketAddrCRepr { + v4: c::sockaddr_in, + v6: c::sockaddr_in6, +} + +impl SocketAddrCRepr { + fn as_ptr(&self) -> *const c::sockaddr { + self as *const _ as *const c::sockaddr + } +} + +fn socket_addr_to_c(addr: &SocketAddr) -> (SocketAddrCRepr, c::socklen_t) { + match addr { + SocketAddr::V4(a) => { + let sockaddr = SocketAddrCRepr { v4: socket_addr_v4_to_c(a) }; + (sockaddr, size_of::<c::sockaddr_in>() as c::socklen_t) + } + SocketAddr::V6(a) => { + let sockaddr = SocketAddrCRepr { v6: socket_addr_v6_to_c(a) }; + (sockaddr, size_of::<c::sockaddr_in6>() as c::socklen_t) + } + } +} + +unsafe fn socket_addr_from_c( + storage: *const c::sockaddr_storage, + len: usize, +) -> io::Result<SocketAddr> { + match (*storage).ss_family as c_int { + c::AF_INET => { + assert!(len >= size_of::<c::sockaddr_in>()); + Ok(SocketAddr::V4(socket_addr_v4_from_c(unsafe { + *(storage as *const _ as *const c::sockaddr_in) + }))) + } + c::AF_INET6 => { + assert!(len >= size_of::<c::sockaddr_in6>()); + Ok(SocketAddr::V6(socket_addr_v6_from_c(unsafe { + *(storage as *const _ as *const c::sockaddr_in6) + }))) + } + _ => Err(io::const_error!(ErrorKind::InvalidInput, "invalid argument")), + } +} + +//////////////////////////////////////////////////////////////////////////////// +// sockaddr and misc bindings +//////////////////////////////////////////////////////////////////////////////// + +pub fn setsockopt<T>( + sock: &Socket, + level: c_int, + option_name: c_int, + option_value: T, +) -> io::Result<()> { + unsafe { + cvt(c::setsockopt( + sock.as_raw(), + level, + option_name, + (&raw const option_value) as *const _, + size_of::<T>() as c::socklen_t, + ))?; + Ok(()) + } +} + +pub fn getsockopt<T: Copy>(sock: &Socket, level: c_int, option_name: c_int) -> io::Result<T> { + unsafe { + let mut option_value: T = mem::zeroed(); + let mut option_len = size_of::<T>() as c::socklen_t; + cvt(c::getsockopt( + sock.as_raw(), + level, + option_name, + (&raw mut option_value) as *mut _, + &mut option_len, + ))?; + Ok(option_value) + } +} + +fn sockname<F>(f: F) -> io::Result<SocketAddr> +where + F: FnOnce(*mut c::sockaddr, *mut c::socklen_t) -> c_int, +{ + unsafe { + let mut storage: c::sockaddr_storage = mem::zeroed(); + let mut len = size_of_val(&storage) as c::socklen_t; + cvt(f((&raw mut storage) as *mut _, &mut len))?; + socket_addr_from_c(&storage, len as usize) + } +} + +#[cfg(target_os = "android")] +fn to_ipv6mr_interface(value: u32) -> c_int { + value as c_int +} + +#[cfg(not(target_os = "android"))] +fn to_ipv6mr_interface(value: u32) -> crate::ffi::c_uint { + value as crate::ffi::c_uint +} + +//////////////////////////////////////////////////////////////////////////////// +// get_host_addresses +//////////////////////////////////////////////////////////////////////////////// + +pub struct LookupHost { + original: *mut c::addrinfo, + cur: *mut c::addrinfo, + port: u16, +} + +impl LookupHost { + pub fn port(&self) -> u16 { + self.port + } +} + +impl Iterator for LookupHost { + type Item = SocketAddr; + fn next(&mut self) -> Option<SocketAddr> { + loop { + unsafe { + let cur = self.cur.as_ref()?; + self.cur = cur.ai_next; + match socket_addr_from_c(cur.ai_addr.cast(), cur.ai_addrlen as usize) { + Ok(addr) => return Some(addr), + Err(_) => continue, + } + } + } + } +} + +unsafe impl Sync for LookupHost {} +unsafe impl Send for LookupHost {} + +impl Drop for LookupHost { + fn drop(&mut self) { + unsafe { c::freeaddrinfo(self.original) } + } +} + +impl TryFrom<&str> for LookupHost { + type Error = io::Error; + + fn try_from(s: &str) -> io::Result<LookupHost> { + macro_rules! try_opt { + ($e:expr, $msg:expr) => { + match $e { + Some(r) => r, + None => return Err(io::const_error!(io::ErrorKind::InvalidInput, $msg)), + } + }; + } + + // split the string by ':' and convert the second part to u16 + let (host, port_str) = try_opt!(s.rsplit_once(':'), "invalid socket address"); + let port: u16 = try_opt!(port_str.parse().ok(), "invalid port value"); + (host, port).try_into() + } +} + +impl<'a> TryFrom<(&'a str, u16)> for LookupHost { + type Error = io::Error; + + fn try_from((host, port): (&'a str, u16)) -> io::Result<LookupHost> { + init(); + + run_with_cstr(host.as_bytes(), &|c_host| { + let mut hints: c::addrinfo = unsafe { mem::zeroed() }; + hints.ai_socktype = c::SOCK_STREAM; + let mut res = ptr::null_mut(); + unsafe { + cvt_gai(c::getaddrinfo(c_host.as_ptr(), ptr::null(), &hints, &mut res)) + .map(|_| LookupHost { original: res, cur: res, port }) + } + }) + } +} + +//////////////////////////////////////////////////////////////////////////////// +// TCP streams +//////////////////////////////////////////////////////////////////////////////// + +pub struct TcpStream { + inner: Socket, +} + +impl TcpStream { + pub fn connect<A: ToSocketAddrs>(addr: A) -> io::Result<TcpStream> { + init(); + return each_addr(addr, inner); + + fn inner(addr: &SocketAddr) -> io::Result<TcpStream> { + let sock = Socket::new(addr, c::SOCK_STREAM)?; + sock.connect(addr)?; + Ok(TcpStream { inner: sock }) + } + } + + pub fn connect_timeout(addr: &SocketAddr, timeout: Duration) -> io::Result<TcpStream> { + init(); + + let sock = Socket::new(addr, c::SOCK_STREAM)?; + sock.connect_timeout(addr, timeout)?; + Ok(TcpStream { inner: sock }) + } + + #[inline] + pub fn socket(&self) -> &Socket { + &self.inner + } + + pub fn into_socket(self) -> Socket { + self.inner + } + + pub fn set_read_timeout(&self, dur: Option<Duration>) -> io::Result<()> { + self.inner.set_timeout(dur, c::SO_RCVTIMEO) + } + + pub fn set_write_timeout(&self, dur: Option<Duration>) -> io::Result<()> { + self.inner.set_timeout(dur, c::SO_SNDTIMEO) + } + + pub fn read_timeout(&self) -> io::Result<Option<Duration>> { + self.inner.timeout(c::SO_RCVTIMEO) + } + + pub fn write_timeout(&self) -> io::Result<Option<Duration>> { + self.inner.timeout(c::SO_SNDTIMEO) + } + + pub fn peek(&self, buf: &mut [u8]) -> io::Result<usize> { + self.inner.peek(buf) + } + + pub fn read(&self, buf: &mut [u8]) -> io::Result<usize> { + self.inner.read(buf) + } + + pub fn read_buf(&self, buf: BorrowedCursor<'_>) -> io::Result<()> { + self.inner.read_buf(buf) + } + + pub fn read_vectored(&self, bufs: &mut [IoSliceMut<'_>]) -> io::Result<usize> { + self.inner.read_vectored(bufs) + } + + #[inline] + pub fn is_read_vectored(&self) -> bool { + self.inner.is_read_vectored() + } + + pub fn write(&self, buf: &[u8]) -> io::Result<usize> { + let len = cmp::min(buf.len(), <wrlen_t>::MAX as usize) as wrlen_t; + let ret = cvt(unsafe { + c::send(self.inner.as_raw(), buf.as_ptr() as *const c_void, len, MSG_NOSIGNAL) + })?; + Ok(ret as usize) + } + + pub fn write_vectored(&self, bufs: &[IoSlice<'_>]) -> io::Result<usize> { + self.inner.write_vectored(bufs) + } + + #[inline] + pub fn is_write_vectored(&self) -> bool { + self.inner.is_write_vectored() + } + + pub fn peer_addr(&self) -> io::Result<SocketAddr> { + sockname(|buf, len| unsafe { c::getpeername(self.inner.as_raw(), buf, len) }) + } + + pub fn socket_addr(&self) -> io::Result<SocketAddr> { + sockname(|buf, len| unsafe { c::getsockname(self.inner.as_raw(), buf, len) }) + } + + pub fn shutdown(&self, how: Shutdown) -> io::Result<()> { + self.inner.shutdown(how) + } + + pub fn duplicate(&self) -> io::Result<TcpStream> { + self.inner.duplicate().map(|s| TcpStream { inner: s }) + } + + pub fn set_linger(&self, linger: Option<Duration>) -> io::Result<()> { + self.inner.set_linger(linger) + } + + pub fn linger(&self) -> io::Result<Option<Duration>> { + self.inner.linger() + } + + pub fn set_nodelay(&self, nodelay: bool) -> io::Result<()> { + self.inner.set_nodelay(nodelay) + } + + pub fn nodelay(&self) -> io::Result<bool> { + self.inner.nodelay() + } + + pub fn set_ttl(&self, ttl: u32) -> io::Result<()> { + setsockopt(&self.inner, c::IPPROTO_IP, c::IP_TTL, ttl as c_int) + } + + pub fn ttl(&self) -> io::Result<u32> { + let raw: c_int = getsockopt(&self.inner, c::IPPROTO_IP, c::IP_TTL)?; + Ok(raw as u32) + } + + pub fn take_error(&self) -> io::Result<Option<io::Error>> { + self.inner.take_error() + } + + pub fn set_nonblocking(&self, nonblocking: bool) -> io::Result<()> { + self.inner.set_nonblocking(nonblocking) + } +} + +impl AsInner<Socket> for TcpStream { + #[inline] + fn as_inner(&self) -> &Socket { + &self.inner + } +} + +impl FromInner<Socket> for TcpStream { + fn from_inner(socket: Socket) -> TcpStream { + TcpStream { inner: socket } + } +} + +impl fmt::Debug for TcpStream { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + let mut res = f.debug_struct("TcpStream"); + + if let Ok(addr) = self.socket_addr() { + res.field("addr", &addr); + } + + if let Ok(peer) = self.peer_addr() { + res.field("peer", &peer); + } + + let name = if cfg!(windows) { "socket" } else { "fd" }; + res.field(name, &self.inner.as_raw()).finish() + } +} + +//////////////////////////////////////////////////////////////////////////////// +// TCP listeners +//////////////////////////////////////////////////////////////////////////////// + +pub struct TcpListener { + inner: Socket, +} + +impl TcpListener { + pub fn bind<A: ToSocketAddrs>(addr: A) -> io::Result<TcpListener> { + init(); + return each_addr(addr, inner); + + fn inner(addr: &SocketAddr) -> io::Result<TcpListener> { + let sock = Socket::new(addr, c::SOCK_STREAM)?; + + // On platforms with Berkeley-derived sockets, this allows to quickly + // rebind a socket, without needing to wait for the OS to clean up the + // previous one. + // + // On Windows, this allows rebinding sockets which are actively in use, + // which allows “socket hijacking”, so we explicitly don't set it here. + // https://docs.microsoft.com/en-us/windows/win32/winsock/using-so-reuseaddr-and-so-exclusiveaddruse + #[cfg(not(windows))] + setsockopt(&sock, c::SOL_SOCKET, c::SO_REUSEADDR, 1 as c_int)?; + + // Bind our new socket + let (addr, len) = socket_addr_to_c(addr); + cvt(unsafe { c::bind(sock.as_raw(), addr.as_ptr(), len as _) })?; + + let backlog = if cfg!(target_os = "horizon") { + // The 3DS doesn't support a big connection backlog. Sometimes + // it allows up to about 37, but other times it doesn't even + // accept 32. There may be a global limitation causing this. + 20 + } else if cfg!(target_os = "haiku") { + // Haiku does not support a queue length > 32 + // https://github.com/haiku/haiku/blob/979a0bc487864675517fb2fab28f87dc8bf43041/headers/posix/sys/socket.h#L81 + 32 + } else { + // The default for all other platforms + 128 + }; + + // Start listening + cvt(unsafe { c::listen(sock.as_raw(), backlog) })?; + Ok(TcpListener { inner: sock }) + } + } + + #[inline] + pub fn socket(&self) -> &Socket { + &self.inner + } + + pub fn into_socket(self) -> Socket { + self.inner + } + + pub fn socket_addr(&self) -> io::Result<SocketAddr> { + sockname(|buf, len| unsafe { c::getsockname(self.inner.as_raw(), buf, len) }) + } + + pub fn accept(&self) -> io::Result<(TcpStream, SocketAddr)> { + // The `accept` function will fill in the storage with the address, + // so we don't need to zero it here. + // reference: https://linux.die.net/man/2/accept4 + let mut storage: mem::MaybeUninit<c::sockaddr_storage> = mem::MaybeUninit::uninit(); + let mut len = size_of_val(&storage) as c::socklen_t; + let sock = self.inner.accept(storage.as_mut_ptr() as *mut _, &mut len)?; + let addr = unsafe { socket_addr_from_c(storage.as_ptr(), len as usize)? }; + Ok((TcpStream { inner: sock }, addr)) + } + + pub fn duplicate(&self) -> io::Result<TcpListener> { + self.inner.duplicate().map(|s| TcpListener { inner: s }) + } + + pub fn set_ttl(&self, ttl: u32) -> io::Result<()> { + setsockopt(&self.inner, c::IPPROTO_IP, c::IP_TTL, ttl as c_int) + } + + pub fn ttl(&self) -> io::Result<u32> { + let raw: c_int = getsockopt(&self.inner, c::IPPROTO_IP, c::IP_TTL)?; + Ok(raw as u32) + } + + pub fn set_only_v6(&self, only_v6: bool) -> io::Result<()> { + setsockopt(&self.inner, c::IPPROTO_IPV6, c::IPV6_V6ONLY, only_v6 as c_int) + } + + pub fn only_v6(&self) -> io::Result<bool> { + let raw: c_int = getsockopt(&self.inner, c::IPPROTO_IPV6, c::IPV6_V6ONLY)?; + Ok(raw != 0) + } + + pub fn take_error(&self) -> io::Result<Option<io::Error>> { + self.inner.take_error() + } + + pub fn set_nonblocking(&self, nonblocking: bool) -> io::Result<()> { + self.inner.set_nonblocking(nonblocking) + } +} + +impl FromInner<Socket> for TcpListener { + fn from_inner(socket: Socket) -> TcpListener { + TcpListener { inner: socket } + } +} + +impl fmt::Debug for TcpListener { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + let mut res = f.debug_struct("TcpListener"); + + if let Ok(addr) = self.socket_addr() { + res.field("addr", &addr); + } + + let name = if cfg!(windows) { "socket" } else { "fd" }; + res.field(name, &self.inner.as_raw()).finish() + } +} + +//////////////////////////////////////////////////////////////////////////////// +// UDP +//////////////////////////////////////////////////////////////////////////////// + +pub struct UdpSocket { + inner: Socket, +} + +impl UdpSocket { + pub fn bind<A: ToSocketAddrs>(addr: A) -> io::Result<UdpSocket> { + init(); + return each_addr(addr, inner); + + fn inner(addr: &SocketAddr) -> io::Result<UdpSocket> { + let sock = Socket::new(addr, c::SOCK_DGRAM)?; + let (addr, len) = socket_addr_to_c(addr); + cvt(unsafe { c::bind(sock.as_raw(), addr.as_ptr(), len as _) })?; + Ok(UdpSocket { inner: sock }) + } + } + + #[inline] + pub fn socket(&self) -> &Socket { + &self.inner + } + + pub fn into_socket(self) -> Socket { + self.inner + } + + pub fn peer_addr(&self) -> io::Result<SocketAddr> { + sockname(|buf, len| unsafe { c::getpeername(self.inner.as_raw(), buf, len) }) + } + + pub fn socket_addr(&self) -> io::Result<SocketAddr> { + sockname(|buf, len| unsafe { c::getsockname(self.inner.as_raw(), buf, len) }) + } + + pub fn recv_from(&self, buf: &mut [u8]) -> io::Result<(usize, SocketAddr)> { + self.inner.recv_from(buf) + } + + pub fn peek_from(&self, buf: &mut [u8]) -> io::Result<(usize, SocketAddr)> { + self.inner.peek_from(buf) + } + + pub fn send_to(&self, buf: &[u8], dst: &SocketAddr) -> io::Result<usize> { + let len = cmp::min(buf.len(), <wrlen_t>::MAX as usize) as wrlen_t; + let (dst, dstlen) = socket_addr_to_c(dst); + let ret = cvt(unsafe { + c::sendto( + self.inner.as_raw(), + buf.as_ptr() as *const c_void, + len, + MSG_NOSIGNAL, + dst.as_ptr(), + dstlen, + ) + })?; + Ok(ret as usize) + } + + pub fn duplicate(&self) -> io::Result<UdpSocket> { + self.inner.duplicate().map(|s| UdpSocket { inner: s }) + } + + pub fn set_read_timeout(&self, dur: Option<Duration>) -> io::Result<()> { + self.inner.set_timeout(dur, c::SO_RCVTIMEO) + } + + pub fn set_write_timeout(&self, dur: Option<Duration>) -> io::Result<()> { + self.inner.set_timeout(dur, c::SO_SNDTIMEO) + } + + pub fn read_timeout(&self) -> io::Result<Option<Duration>> { + self.inner.timeout(c::SO_RCVTIMEO) + } + + pub fn write_timeout(&self) -> io::Result<Option<Duration>> { + self.inner.timeout(c::SO_SNDTIMEO) + } + + pub fn set_broadcast(&self, broadcast: bool) -> io::Result<()> { + setsockopt(&self.inner, c::SOL_SOCKET, c::SO_BROADCAST, broadcast as c_int) + } + + pub fn broadcast(&self) -> io::Result<bool> { + let raw: c_int = getsockopt(&self.inner, c::SOL_SOCKET, c::SO_BROADCAST)?; + Ok(raw != 0) + } + + pub fn set_multicast_loop_v4(&self, multicast_loop_v4: bool) -> io::Result<()> { + setsockopt( + &self.inner, + c::IPPROTO_IP, + c::IP_MULTICAST_LOOP, + multicast_loop_v4 as IpV4MultiCastType, + ) + } + + pub fn multicast_loop_v4(&self) -> io::Result<bool> { + let raw: IpV4MultiCastType = getsockopt(&self.inner, c::IPPROTO_IP, c::IP_MULTICAST_LOOP)?; + Ok(raw != 0) + } + + pub fn set_multicast_ttl_v4(&self, multicast_ttl_v4: u32) -> io::Result<()> { + setsockopt( + &self.inner, + c::IPPROTO_IP, + c::IP_MULTICAST_TTL, + multicast_ttl_v4 as IpV4MultiCastType, + ) + } + + pub fn multicast_ttl_v4(&self) -> io::Result<u32> { + let raw: IpV4MultiCastType = getsockopt(&self.inner, c::IPPROTO_IP, c::IP_MULTICAST_TTL)?; + Ok(raw as u32) + } + + pub fn set_multicast_loop_v6(&self, multicast_loop_v6: bool) -> io::Result<()> { + setsockopt(&self.inner, c::IPPROTO_IPV6, c::IPV6_MULTICAST_LOOP, multicast_loop_v6 as c_int) + } + + pub fn multicast_loop_v6(&self) -> io::Result<bool> { + let raw: c_int = getsockopt(&self.inner, c::IPPROTO_IPV6, c::IPV6_MULTICAST_LOOP)?; + Ok(raw != 0) + } + + pub fn join_multicast_v4(&self, multiaddr: &Ipv4Addr, interface: &Ipv4Addr) -> io::Result<()> { + let mreq = c::ip_mreq { + imr_multiaddr: ip_v4_addr_to_c(multiaddr), + imr_interface: ip_v4_addr_to_c(interface), + }; + setsockopt(&self.inner, c::IPPROTO_IP, c::IP_ADD_MEMBERSHIP, mreq) + } + + pub fn join_multicast_v6(&self, multiaddr: &Ipv6Addr, interface: u32) -> io::Result<()> { + let mreq = c::ipv6_mreq { + ipv6mr_multiaddr: ip_v6_addr_to_c(multiaddr), + ipv6mr_interface: to_ipv6mr_interface(interface), + }; + setsockopt(&self.inner, c::IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, mreq) + } + + pub fn leave_multicast_v4(&self, multiaddr: &Ipv4Addr, interface: &Ipv4Addr) -> io::Result<()> { + let mreq = c::ip_mreq { + imr_multiaddr: ip_v4_addr_to_c(multiaddr), + imr_interface: ip_v4_addr_to_c(interface), + }; + setsockopt(&self.inner, c::IPPROTO_IP, c::IP_DROP_MEMBERSHIP, mreq) + } + + pub fn leave_multicast_v6(&self, multiaddr: &Ipv6Addr, interface: u32) -> io::Result<()> { + let mreq = c::ipv6_mreq { + ipv6mr_multiaddr: ip_v6_addr_to_c(multiaddr), + ipv6mr_interface: to_ipv6mr_interface(interface), + }; + setsockopt(&self.inner, c::IPPROTO_IPV6, IPV6_DROP_MEMBERSHIP, mreq) + } + + pub fn set_ttl(&self, ttl: u32) -> io::Result<()> { + setsockopt(&self.inner, c::IPPROTO_IP, c::IP_TTL, ttl as c_int) + } + + pub fn ttl(&self) -> io::Result<u32> { + let raw: c_int = getsockopt(&self.inner, c::IPPROTO_IP, c::IP_TTL)?; + Ok(raw as u32) + } + + pub fn take_error(&self) -> io::Result<Option<io::Error>> { + self.inner.take_error() + } + + pub fn set_nonblocking(&self, nonblocking: bool) -> io::Result<()> { + self.inner.set_nonblocking(nonblocking) + } + + pub fn recv(&self, buf: &mut [u8]) -> io::Result<usize> { + self.inner.read(buf) + } + + pub fn peek(&self, buf: &mut [u8]) -> io::Result<usize> { + self.inner.peek(buf) + } + + pub fn send(&self, buf: &[u8]) -> io::Result<usize> { + let len = cmp::min(buf.len(), <wrlen_t>::MAX as usize) as wrlen_t; + let ret = cvt(unsafe { + c::send(self.inner.as_raw(), buf.as_ptr() as *const c_void, len, MSG_NOSIGNAL) + })?; + Ok(ret as usize) + } + + pub fn connect<A: ToSocketAddrs>(&self, addr: A) -> io::Result<()> { + return each_addr(addr, |addr| inner(self, addr)); + + fn inner(this: &UdpSocket, addr: &SocketAddr) -> io::Result<()> { + let (addr, len) = socket_addr_to_c(addr); + cvt_r(|| unsafe { c::connect(this.inner.as_raw(), addr.as_ptr(), len) }).map(drop) + } + } +} + +impl FromInner<Socket> for UdpSocket { + fn from_inner(socket: Socket) -> UdpSocket { + UdpSocket { inner: socket } + } +} + +impl fmt::Debug for UdpSocket { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + let mut res = f.debug_struct("UdpSocket"); + + if let Ok(addr) = self.socket_addr() { + res.field("addr", &addr); + } + + let name = if cfg!(windows) { "socket" } else { "fd" }; + res.field(name, &self.inner.as_raw()).finish() + } +} |