#[cfg(any(target_os = "linux", target_os = "android"))] use crate::*; use libc::c_char; use nix::sys::socket::{getsockname, AddressFamily, UnixAddr}; use std::collections::hash_map::DefaultHasher; use std::hash::{Hash, Hasher}; use std::net::{SocketAddrV4, SocketAddrV6}; use std::os::unix::io::{AsRawFd, RawFd}; use std::path::Path; use std::slice; use std::str::FromStr; #[cfg(target_os = "linux")] #[cfg_attr(qemu, ignore)] #[test] pub fn test_timestamping() { use nix::sys::socket::{ recvmsg, sendmsg, setsockopt, socket, sockopt::Timestamping, ControlMessageOwned, MsgFlags, SockFlag, SockType, SockaddrIn, TimestampingFlag, }; use std::io::{IoSlice, IoSliceMut}; let sock_addr = SockaddrIn::from_str("127.0.0.1:6790").unwrap(); let ssock = socket( AddressFamily::Inet, SockType::Datagram, SockFlag::empty(), None, ) .expect("send socket failed"); let rsock = socket( AddressFamily::Inet, SockType::Datagram, SockFlag::empty(), None, ) .unwrap(); nix::sys::socket::bind(rsock.as_raw_fd(), &sock_addr).unwrap(); setsockopt(&rsock, Timestamping, &TimestampingFlag::all()).unwrap(); let sbuf = [0u8; 2048]; let mut rbuf = [0u8; 2048]; let flags = MsgFlags::empty(); let iov1 = [IoSlice::new(&sbuf)]; let mut iov2 = [IoSliceMut::new(&mut rbuf)]; let mut cmsg = cmsg_space!(nix::sys::socket::Timestamps); sendmsg(ssock.as_raw_fd(), &iov1, &[], flags, Some(&sock_addr)).unwrap(); let recv = recvmsg::<()>(rsock.as_raw_fd(), &mut iov2, Some(&mut cmsg), flags) .unwrap(); let mut ts = None; for c in recv.cmsgs() { if let ControlMessageOwned::ScmTimestampsns(timestamps) = c { ts = Some(timestamps.system); } } let ts = ts.expect("ScmTimestampns is present"); let sys_time = ::nix::time::clock_gettime(::nix::time::ClockId::CLOCK_REALTIME) .unwrap(); let diff = if ts > sys_time { ts - sys_time } else { sys_time - ts }; assert!(std::time::Duration::from(diff).as_secs() < 60); } #[test] pub fn test_path_to_sock_addr() { let path = "/foo/bar"; let actual = Path::new(path); let addr = UnixAddr::new(actual).unwrap(); let expect: &[c_char] = unsafe { slice::from_raw_parts(path.as_ptr() as *const c_char, path.len()) }; assert_eq!(unsafe { &(*addr.as_ptr()).sun_path[..8] }, expect); assert_eq!(addr.path(), Some(actual)); } fn calculate_hash(t: &T) -> u64 { let mut s = DefaultHasher::new(); t.hash(&mut s); s.finish() } #[test] pub fn test_addr_equality_path() { let path = "/foo/bar"; let actual = Path::new(path); let addr1 = UnixAddr::new(actual).unwrap(); let mut addr2 = addr1; unsafe { (*addr2.as_mut_ptr()).sun_path[10] = 127 }; assert_eq!(addr1, addr2); assert_eq!(calculate_hash(&addr1), calculate_hash(&addr2)); } #[cfg(any(target_os = "android", target_os = "linux"))] #[test] pub fn test_abstract_sun_path_too_long() { let name = String::from("nix\0abstract\0tesnix\0abstract\0tesnix\0abstract\0tesnix\0abstract\0tesnix\0abstract\0testttttnix\0abstract\0test\0make\0sure\0this\0is\0long\0enough"); let addr = UnixAddr::new_abstract(name.as_bytes()); addr.expect_err("assertion failed"); } #[cfg(any(target_os = "android", target_os = "linux"))] #[test] pub fn test_addr_equality_abstract() { let name = String::from("nix\0abstract\0test"); let addr1 = UnixAddr::new_abstract(name.as_bytes()).unwrap(); let mut addr2 = addr1; assert_eq!(addr1, addr2); assert_eq!(calculate_hash(&addr1), calculate_hash(&addr2)); unsafe { (*addr2.as_mut_ptr()).sun_path[17] = 127 }; assert_ne!(addr1, addr2); assert_ne!(calculate_hash(&addr1), calculate_hash(&addr2)); } // Test getting/setting abstract addresses (without unix socket creation) #[cfg(any(target_os = "android", target_os = "linux"))] #[test] pub fn test_abstract_uds_addr() { let empty = String::new(); let addr = UnixAddr::new_abstract(empty.as_bytes()).unwrap(); let sun_path: [u8; 0] = []; assert_eq!(addr.as_abstract(), Some(&sun_path[..])); let name = String::from("nix\0abstract\0test"); let addr = UnixAddr::new_abstract(name.as_bytes()).unwrap(); let sun_path = [ 110u8, 105, 120, 0, 97, 98, 115, 116, 114, 97, 99, 116, 0, 116, 101, 115, 116, ]; assert_eq!(addr.as_abstract(), Some(&sun_path[..])); assert_eq!(addr.path(), None); // Internally, name is null-prefixed (abstract namespace) assert_eq!(unsafe { (*addr.as_ptr()).sun_path[0] }, 0); } // Test getting an unnamed address (without unix socket creation) #[cfg(any(target_os = "android", target_os = "linux"))] #[test] pub fn test_unnamed_uds_addr() { use crate::nix::sys::socket::SockaddrLike; let addr = UnixAddr::new_unnamed(); assert!(addr.is_unnamed()); assert_eq!(addr.len(), 2); assert!(addr.path().is_none()); assert_eq!(addr.path_len(), 0); assert!(addr.as_abstract().is_none()); } #[test] pub fn test_getsockname() { use nix::sys::socket::bind; use nix::sys::socket::{socket, AddressFamily, SockFlag, SockType}; let tempdir = tempfile::tempdir().unwrap(); let sockname = tempdir.path().join("sock"); let sock = socket( AddressFamily::Unix, SockType::Stream, SockFlag::empty(), None, ) .expect("socket failed"); let sockaddr = UnixAddr::new(&sockname).unwrap(); bind(sock.as_raw_fd(), &sockaddr).expect("bind failed"); assert_eq!( sockaddr, getsockname(sock.as_raw_fd()).expect("getsockname failed") ); } #[test] pub fn test_socketpair() { use nix::sys::socket::{socketpair, AddressFamily, SockFlag, SockType}; use nix::unistd::{read, write}; let (fd1, fd2) = socketpair( AddressFamily::Unix, SockType::Stream, None, SockFlag::empty(), ) .unwrap(); write(fd1.as_raw_fd(), b"hello").unwrap(); let mut buf = [0; 5]; read(fd2.as_raw_fd(), &mut buf).unwrap(); assert_eq!(&buf[..], b"hello"); } #[test] pub fn test_recvmsg_sockaddr_un() { use nix::sys::socket::{ self, bind, socket, AddressFamily, MsgFlags, SockFlag, SockType, }; let tempdir = tempfile::tempdir().unwrap(); let sockname = tempdir.path().join("sock"); let sock = socket( AddressFamily::Unix, SockType::Datagram, SockFlag::empty(), None, ) .expect("socket failed"); let sockaddr = UnixAddr::new(&sockname).unwrap(); bind(sock.as_raw_fd(), &sockaddr).expect("bind failed"); // Send a message let send_buffer = "hello".as_bytes(); if let Err(e) = socket::sendmsg( sock.as_raw_fd(), &[std::io::IoSlice::new(send_buffer)], &[], MsgFlags::empty(), Some(&sockaddr), ) { crate::skip!("Couldn't send ({e:?}), so skipping test"); } // Receive the message let mut recv_buffer = [0u8; 32]; let mut iov = [std::io::IoSliceMut::new(&mut recv_buffer)]; let received = socket::recvmsg(sock.as_raw_fd(), &mut iov, None, MsgFlags::empty()) .unwrap(); // Check the address in the received message assert_eq!(sockaddr, received.address.unwrap()); } #[test] pub fn test_std_conversions() { use nix::sys::socket::*; let std_sa = SocketAddrV4::from_str("127.0.0.1:6789").unwrap(); let sock_addr = SockaddrIn::from(std_sa); assert_eq!(std_sa, sock_addr.into()); let std_sa = SocketAddrV6::from_str("[::1]:6000").unwrap(); let sock_addr: SockaddrIn6 = SockaddrIn6::from(std_sa); assert_eq!(std_sa, sock_addr.into()); } mod recvfrom { use super::*; use nix::sys::socket::*; use nix::{errno::Errno, Result}; use std::thread; const MSG: &[u8] = b"Hello, World!"; fn sendrecv( rsock: RawFd, ssock: RawFd, f_send: Fs, mut f_recv: Fr, ) -> Option where Fs: Fn(RawFd, &[u8], MsgFlags) -> Result + Send + 'static, Fr: FnMut(usize, Option), { let mut buf: [u8; 13] = [0u8; 13]; let mut l = 0; let mut from = None; let send_thread = thread::spawn(move || { let mut l = 0; while l < std::mem::size_of_val(MSG) { l += f_send(ssock, &MSG[l..], MsgFlags::empty()).unwrap(); } }); while l < std::mem::size_of_val(MSG) { let (len, from_) = recvfrom(rsock, &mut buf[l..]).unwrap(); f_recv(len, from_); from = from_; l += len; } assert_eq!(&buf, MSG); send_thread.join().unwrap(); from } #[test] pub fn stream() { let (fd2, fd1) = socketpair( AddressFamily::Unix, SockType::Stream, None, SockFlag::empty(), ) .unwrap(); // Ignore from for stream sockets let _ = sendrecv(fd1.as_raw_fd(), fd2.as_raw_fd(), send, |_, _| {}); } #[test] pub fn udp() { let std_sa = SocketAddrV4::from_str("127.0.0.1:6789").unwrap(); let sock_addr = SockaddrIn::from(std_sa); let rsock = socket( AddressFamily::Inet, SockType::Datagram, SockFlag::empty(), None, ) .unwrap(); bind(rsock.as_raw_fd(), &sock_addr).unwrap(); let ssock = socket( AddressFamily::Inet, SockType::Datagram, SockFlag::empty(), None, ) .expect("send socket failed"); let from = sendrecv( rsock.as_raw_fd(), ssock.as_raw_fd(), move |s, m, flags| sendto(s.as_raw_fd(), m, &sock_addr, flags), |_, _| {}, ); // UDP sockets should set the from address assert_eq!(AddressFamily::Inet, from.unwrap().family().unwrap()); } #[cfg(target_os = "linux")] mod udp_offload { use super::*; use nix::sys::socket::sockopt::{UdpGroSegment, UdpGsoSegment}; use std::io::IoSlice; #[test] // Disable the test under emulation because it fails in Cirrus-CI. Lack // of QEMU support is suspected. #[cfg_attr(qemu, ignore)] pub fn gso() { require_kernel_version!(udp_offload::gso, ">= 4.18"); // In this test, we send the data and provide a GSO segment size. // Since we are sending the buffer of size 13, six UDP packets // with size 2 and two UDP packet with size 1 will be sent. let segment_size: u16 = 2; let sock_addr = SockaddrIn::new(127, 0, 0, 1, 6791); let rsock = socket( AddressFamily::Inet, SockType::Datagram, SockFlag::empty(), None, ) .unwrap(); setsockopt(&rsock, UdpGsoSegment, &(segment_size as _)) .expect("setsockopt UDP_SEGMENT failed"); bind(rsock.as_raw_fd(), &sock_addr).unwrap(); let ssock = socket( AddressFamily::Inet, SockType::Datagram, SockFlag::empty(), None, ) .expect("send socket failed"); let mut num_packets_received: i32 = 0; sendrecv( rsock.as_raw_fd(), ssock.as_raw_fd(), move |s, m, flags| { let iov = [IoSlice::new(m)]; let cmsg = ControlMessage::UdpGsoSegments(&segment_size); sendmsg( s.as_raw_fd(), &iov, &[cmsg], flags, Some(&sock_addr), ) }, { let num_packets_received_ref = &mut num_packets_received; move |len, _| { // check that we receive UDP packets with payload size // less or equal to segment size assert!(len <= segment_size as usize); *num_packets_received_ref += 1; } }, ); // Buffer size is 13, we will receive six packets of size 2, // and one packet of size 1. assert_eq!(7, num_packets_received); } #[test] // Disable the test on emulated platforms because it fails in Cirrus-CI. // Lack of QEMU support is suspected. #[cfg_attr(qemu, ignore)] pub fn gro() { require_kernel_version!(udp_offload::gro, ">= 5.3"); // It's hard to guarantee receiving GRO packets. Just checking // that `setsockopt` doesn't fail with error let rsock = socket( AddressFamily::Inet, SockType::Datagram, SockFlag::empty(), None, ) .unwrap(); setsockopt(&rsock, UdpGroSegment, &true) .expect("setsockopt UDP_GRO failed"); } } #[cfg(any( target_os = "linux", target_os = "android", target_os = "freebsd", target_os = "netbsd", ))] #[test] pub fn udp_sendmmsg() { use std::io::IoSlice; let std_sa = SocketAddrV4::from_str("127.0.0.1:6793").unwrap(); let std_sa2 = SocketAddrV4::from_str("127.0.0.1:6794").unwrap(); let sock_addr = SockaddrIn::from(std_sa); let sock_addr2 = SockaddrIn::from(std_sa2); let rsock = socket( AddressFamily::Inet, SockType::Datagram, SockFlag::empty(), None, ) .unwrap(); bind(rsock.as_raw_fd(), &sock_addr).unwrap(); let ssock = socket( AddressFamily::Inet, SockType::Datagram, SockFlag::empty(), None, ) .expect("send socket failed"); let from = sendrecv( rsock.as_raw_fd(), ssock.as_raw_fd(), move |s, m, flags| { let batch_size = 15; let mut iovs = Vec::with_capacity(1 + batch_size); let mut addrs = Vec::with_capacity(1 + batch_size); let mut data = MultiHeaders::preallocate(1 + batch_size, None); let iov = IoSlice::new(m); // first chunk: iovs.push([iov]); addrs.push(Some(sock_addr)); for _ in 0..batch_size { iovs.push([iov]); addrs.push(Some(sock_addr2)); } let res = sendmmsg(s, &mut data, &iovs, addrs, [], flags)?; let mut sent_messages = 0; let mut sent_bytes = 0; for item in res { sent_messages += 1; sent_bytes += item.bytes; } // assert_eq!(sent_messages, iovs.len()); assert_eq!(sent_bytes, sent_messages * m.len()); Ok(sent_messages) }, |_, _| {}, ); // UDP sockets should set the from address assert_eq!(AddressFamily::Inet, from.unwrap().family().unwrap()); } #[cfg(any( target_os = "linux", target_os = "android", target_os = "freebsd", target_os = "netbsd", ))] #[test] pub fn udp_recvmmsg() { use nix::sys::socket::{recvmmsg, MsgFlags}; use std::io::IoSliceMut; const NUM_MESSAGES_SENT: usize = 2; const DATA: [u8; 2] = [1, 2]; let inet_addr = SocketAddrV4::from_str("127.0.0.1:6798").unwrap(); let sock_addr = SockaddrIn::from(inet_addr); let rsock = socket( AddressFamily::Inet, SockType::Datagram, SockFlag::empty(), None, ) .unwrap(); bind(rsock.as_raw_fd(), &sock_addr).unwrap(); let ssock = socket( AddressFamily::Inet, SockType::Datagram, SockFlag::empty(), None, ) .expect("send socket failed"); let send_thread = thread::spawn(move || { for _ in 0..NUM_MESSAGES_SENT { sendto( ssock.as_raw_fd(), &DATA[..], &sock_addr, MsgFlags::empty(), ) .unwrap(); } }); let mut msgs = std::collections::LinkedList::new(); // Buffers to receive exactly `NUM_MESSAGES_SENT` messages let mut receive_buffers = [[0u8; 32]; NUM_MESSAGES_SENT]; msgs.extend( receive_buffers .iter_mut() .map(|buf| [IoSliceMut::new(&mut buf[..])]), ); let mut data = MultiHeaders::::preallocate(msgs.len(), None); let res: Vec> = recvmmsg( rsock.as_raw_fd(), &mut data, msgs.iter(), MsgFlags::empty(), None, ) .expect("recvmmsg") .collect(); assert_eq!(res.len(), DATA.len()); for RecvMsg { address, bytes, .. } in res.into_iter() { assert_eq!(AddressFamily::Inet, address.unwrap().family().unwrap()); assert_eq!(DATA.len(), bytes); } for buf in &receive_buffers { assert_eq!(&buf[..DATA.len()], DATA); } send_thread.join().unwrap(); } #[cfg(any( target_os = "linux", target_os = "android", target_os = "freebsd", target_os = "netbsd", ))] #[test] pub fn udp_recvmmsg_dontwait_short_read() { use nix::sys::socket::{recvmmsg, MsgFlags}; use std::io::IoSliceMut; const NUM_MESSAGES_SENT: usize = 2; const DATA: [u8; 4] = [1, 2, 3, 4]; let inet_addr = SocketAddrV4::from_str("127.0.0.1:6799").unwrap(); let sock_addr = SockaddrIn::from(inet_addr); let rsock = socket( AddressFamily::Inet, SockType::Datagram, SockFlag::empty(), None, ) .unwrap(); bind(rsock.as_raw_fd(), &sock_addr).unwrap(); let ssock = socket( AddressFamily::Inet, SockType::Datagram, SockFlag::empty(), None, ) .expect("send socket failed"); let send_thread = thread::spawn(move || { for _ in 0..NUM_MESSAGES_SENT { sendto( ssock.as_raw_fd(), &DATA[..], &sock_addr, MsgFlags::empty(), ) .unwrap(); } }); // Ensure we've sent all the messages before continuing so `recvmmsg` // will return right away send_thread.join().unwrap(); let mut msgs = std::collections::LinkedList::new(); // Buffers to receive >`NUM_MESSAGES_SENT` messages to ensure `recvmmsg` // will return when there are fewer than requested messages in the // kernel buffers when using `MSG_DONTWAIT`. let mut receive_buffers = [[0u8; 32]; NUM_MESSAGES_SENT + 2]; msgs.extend( receive_buffers .iter_mut() .map(|buf| [IoSliceMut::new(&mut buf[..])]), ); let mut data = MultiHeaders::::preallocate( NUM_MESSAGES_SENT + 2, None, ); let res: Vec> = recvmmsg( rsock.as_raw_fd(), &mut data, msgs.iter(), MsgFlags::MSG_DONTWAIT, None, ) .expect("recvmmsg") .collect(); assert_eq!(res.len(), NUM_MESSAGES_SENT); for RecvMsg { address, bytes, .. } in res.into_iter() { assert_eq!(AddressFamily::Inet, address.unwrap().family().unwrap()); assert_eq!(DATA.len(), bytes); } for buf in &receive_buffers[..NUM_MESSAGES_SENT] { assert_eq!(&buf[..DATA.len()], DATA); } } #[test] pub fn udp_inet6() { let addr = std::net::Ipv6Addr::from_str("::1").unwrap(); let rport = 6789; let rstd_sa = SocketAddrV6::new(addr, rport, 0, 0); let raddr = SockaddrIn6::from(rstd_sa); let sport = 6790; let sstd_sa = SocketAddrV6::new(addr, sport, 0, 0); let saddr = SockaddrIn6::from(sstd_sa); let rsock = socket( AddressFamily::Inet6, SockType::Datagram, SockFlag::empty(), None, ) .expect("receive socket failed"); match bind(rsock.as_raw_fd(), &raddr) { Err(Errno::EADDRNOTAVAIL) => { println!("IPv6 not available, skipping test."); return; } Err(e) => panic!("bind: {e}"), Ok(()) => (), } let ssock = socket( AddressFamily::Inet6, SockType::Datagram, SockFlag::empty(), None, ) .expect("send socket failed"); bind(ssock.as_raw_fd(), &saddr).unwrap(); let from = sendrecv( rsock.as_raw_fd(), ssock.as_raw_fd(), move |s, m, flags| sendto(s.as_raw_fd(), m, &raddr, flags), |_, _| {}, ); assert_eq!(AddressFamily::Inet6, from.unwrap().family().unwrap()); let osent_addr = from.unwrap(); let sent_addr = osent_addr.as_sockaddr_in6().unwrap(); assert_eq!(sent_addr.ip(), addr); assert_eq!(sent_addr.port(), sport); } } // Test error handling of our recvmsg wrapper #[test] pub fn test_recvmsg_ebadf() { use nix::errno::Errno; use nix::sys::socket::{recvmsg, MsgFlags}; use std::io::IoSliceMut; let mut buf = [0u8; 5]; let mut iov = [IoSliceMut::new(&mut buf[..])]; let fd = -1; // Bad file descriptor let r = recvmsg::<()>(fd.as_raw_fd(), &mut iov, None, MsgFlags::empty()); assert_eq!(r.err().unwrap(), Errno::EBADF); } // Disable the test on emulated platforms due to a bug in QEMU versions < // 2.12.0. https://bugs.launchpad.net/qemu/+bug/1701808 #[cfg_attr(qemu, ignore)] #[test] pub fn test_scm_rights() { use nix::sys::socket::{ recvmsg, sendmsg, socketpair, AddressFamily, ControlMessage, ControlMessageOwned, MsgFlags, SockFlag, SockType, }; use nix::unistd::{close, pipe, read, write}; use std::io::{IoSlice, IoSliceMut}; let (fd1, fd2) = socketpair( AddressFamily::Unix, SockType::Stream, None, SockFlag::empty(), ) .unwrap(); let (r, w) = pipe().unwrap(); let mut received_r: Option = None; { let iov = [IoSlice::new(b"hello")]; let fds = [r]; let cmsg = ControlMessage::ScmRights(&fds); assert_eq!( sendmsg::<()>( fd1.as_raw_fd(), &iov, &[cmsg], MsgFlags::empty(), None ) .unwrap(), 5 ); close(r).unwrap(); } { let mut buf = [0u8; 5]; let mut iov = [IoSliceMut::new(&mut buf[..])]; let mut cmsgspace = cmsg_space!([RawFd; 1]); let msg = recvmsg::<()>( fd2.as_raw_fd(), &mut iov, Some(&mut cmsgspace), MsgFlags::empty(), ) .unwrap(); for cmsg in msg.cmsgs() { if let ControlMessageOwned::ScmRights(fd) = cmsg { assert_eq!(received_r, None); assert_eq!(fd.len(), 1); received_r = Some(fd[0]); } else { panic!("unexpected cmsg"); } } assert_eq!(msg.bytes, 5); assert!(!msg .flags .intersects(MsgFlags::MSG_TRUNC | MsgFlags::MSG_CTRUNC)); } let received_r = received_r.expect("Did not receive passed fd"); // Ensure that the received file descriptor works write(w.as_raw_fd(), b"world").unwrap(); let mut buf = [0u8; 5]; read(received_r.as_raw_fd(), &mut buf).unwrap(); assert_eq!(&buf[..], b"world"); close(received_r).unwrap(); close(w).unwrap(); } // Disable the test on emulated platforms due to not enabled support of AF_ALG in QEMU from rust cross #[cfg(any(target_os = "linux", target_os = "android"))] #[cfg_attr(qemu, ignore)] #[test] pub fn test_af_alg_cipher() { use nix::sys::socket::sockopt::AlgSetKey; use nix::sys::socket::{ accept, bind, sendmsg, setsockopt, socket, AddressFamily, AlgAddr, ControlMessage, MsgFlags, SockFlag, SockType, }; use nix::unistd::read; use std::io::IoSlice; skip_if_cirrus!("Fails for an unknown reason Cirrus CI. Bug #1352"); // Travis's seccomp profile blocks AF_ALG // https://docs.docker.com/engine/security/seccomp/ skip_if_seccomp!(test_af_alg_cipher); let alg_type = "skcipher"; let alg_name = "ctr-aes-aesni"; // 256-bits secret key let key = vec![0u8; 32]; // 16-bytes IV let iv_len = 16; let iv = vec![1u8; iv_len]; // 256-bytes plain payload let payload_len = 256; let payload = vec![2u8; payload_len]; let sock = socket( AddressFamily::Alg, SockType::SeqPacket, SockFlag::empty(), None, ) .expect("socket failed"); let sockaddr = AlgAddr::new(alg_type, alg_name); bind(sock.as_raw_fd(), &sockaddr).expect("bind failed"); assert_eq!(sockaddr.alg_name().to_string_lossy(), alg_name); assert_eq!(sockaddr.alg_type().to_string_lossy(), alg_type); setsockopt(&sock, AlgSetKey::default(), &key).expect("setsockopt"); let session_socket = accept(sock.as_raw_fd()).expect("accept failed"); let msgs = [ ControlMessage::AlgSetOp(&libc::ALG_OP_ENCRYPT), ControlMessage::AlgSetIv(iv.as_slice()), ]; let iov = IoSlice::new(&payload); sendmsg::<()>( session_socket.as_raw_fd(), &[iov], &msgs, MsgFlags::empty(), None, ) .expect("sendmsg encrypt"); // allocate buffer for encrypted data let mut encrypted = vec![0u8; payload_len]; let num_bytes = read(session_socket.as_raw_fd(), &mut encrypted).expect("read encrypt"); assert_eq!(num_bytes, payload_len); let iov = IoSlice::new(&encrypted); let iv = vec![1u8; iv_len]; let msgs = [ ControlMessage::AlgSetOp(&libc::ALG_OP_DECRYPT), ControlMessage::AlgSetIv(iv.as_slice()), ]; sendmsg::<()>( session_socket.as_raw_fd(), &[iov], &msgs, MsgFlags::empty(), None, ) .expect("sendmsg decrypt"); // allocate buffer for decrypted data let mut decrypted = vec![0u8; payload_len]; let num_bytes = read(session_socket.as_raw_fd(), &mut decrypted).expect("read decrypt"); assert_eq!(num_bytes, payload_len); assert_eq!(decrypted, payload); } // Disable the test on emulated platforms due to not enabled support of AF_ALG // in QEMU from rust cross #[cfg(any(target_os = "linux", target_os = "android"))] #[cfg_attr(qemu, ignore)] #[test] pub fn test_af_alg_aead() { use libc::{ALG_OP_DECRYPT, ALG_OP_ENCRYPT}; use nix::fcntl::{fcntl, FcntlArg, OFlag}; use nix::sys::socket::sockopt::{AlgSetAeadAuthSize, AlgSetKey}; use nix::sys::socket::{ accept, bind, sendmsg, setsockopt, socket, AddressFamily, AlgAddr, ControlMessage, MsgFlags, SockFlag, SockType, }; use nix::unistd::read; use std::io::IoSlice; skip_if_cirrus!("Fails for an unknown reason Cirrus CI. Bug #1352"); // Travis's seccomp profile blocks AF_ALG // https://docs.docker.com/engine/security/seccomp/ skip_if_seccomp!(test_af_alg_aead); let auth_size = 4usize; let assoc_size = 16u32; let alg_type = "aead"; let alg_name = "gcm(aes)"; // 256-bits secret key let key = vec![0u8; 32]; // 12-bytes IV let iv_len = 12; let iv = vec![1u8; iv_len]; // 256-bytes plain payload let payload_len = 256; let mut payload = vec![2u8; payload_len + (assoc_size as usize) + auth_size]; for i in 0..assoc_size { payload[i as usize] = 10; } let len = payload.len(); for i in 0..auth_size { payload[len - 1 - i] = 0; } let sock = socket( AddressFamily::Alg, SockType::SeqPacket, SockFlag::empty(), None, ) .expect("socket failed"); let sockaddr = AlgAddr::new(alg_type, alg_name); bind(sock.as_raw_fd(), &sockaddr).expect("bind failed"); setsockopt(&sock, AlgSetAeadAuthSize, &auth_size) .expect("setsockopt AlgSetAeadAuthSize"); setsockopt(&sock, AlgSetKey::default(), &key) .expect("setsockopt AlgSetKey"); let session_socket = accept(sock.as_raw_fd()).expect("accept failed"); let msgs = [ ControlMessage::AlgSetOp(&ALG_OP_ENCRYPT), ControlMessage::AlgSetIv(iv.as_slice()), ControlMessage::AlgSetAeadAssoclen(&assoc_size), ]; let iov = IoSlice::new(&payload); sendmsg::<()>( session_socket.as_raw_fd(), &[iov], &msgs, MsgFlags::empty(), None, ) .expect("sendmsg encrypt"); // allocate buffer for encrypted data let mut encrypted = vec![0u8; (assoc_size as usize) + payload_len + auth_size]; let num_bytes = read(session_socket.as_raw_fd(), &mut encrypted).expect("read encrypt"); assert_eq!(num_bytes, payload_len + auth_size + (assoc_size as usize)); for i in 0..assoc_size { encrypted[i as usize] = 10; } let iov = IoSlice::new(&encrypted); let iv = vec![1u8; iv_len]; let session_socket = accept(sock.as_raw_fd()).expect("accept failed"); let msgs = [ ControlMessage::AlgSetOp(&ALG_OP_DECRYPT), ControlMessage::AlgSetIv(iv.as_slice()), ControlMessage::AlgSetAeadAssoclen(&assoc_size), ]; sendmsg::<()>( session_socket.as_raw_fd(), &[iov], &msgs, MsgFlags::empty(), None, ) .expect("sendmsg decrypt"); // allocate buffer for decrypted data let mut decrypted = vec![0u8; payload_len + (assoc_size as usize) + auth_size]; // Starting with kernel 4.9, the interface changed slightly such that the // authentication tag memory is only needed in the output buffer for encryption // and in the input buffer for decryption. // Do not block on read, as we may have fewer bytes than buffer size fcntl(session_socket, FcntlArg::F_SETFL(OFlag::O_NONBLOCK)) .expect("fcntl non_blocking"); let num_bytes = read(session_socket.as_raw_fd(), &mut decrypted).expect("read decrypt"); assert!(num_bytes >= payload_len + (assoc_size as usize)); assert_eq!( decrypted[(assoc_size as usize)..(payload_len + (assoc_size as usize))], payload[(assoc_size as usize)..payload_len + (assoc_size as usize)] ); } // Verify `ControlMessage::Ipv4PacketInfo` for `sendmsg`. // This creates a (udp) socket bound to localhost, then sends a message to // itself but uses Ipv4PacketInfo to force the source address to be localhost. // // This would be a more interesting test if we could assume that the test host // has more than one IP address (since we could select a different address to // test from). #[cfg(any(target_os = "linux", target_os = "macos", target_os = "netbsd"))] #[test] pub fn test_sendmsg_ipv4packetinfo() { use cfg_if::cfg_if; use nix::sys::socket::{ bind, sendmsg, socket, AddressFamily, ControlMessage, MsgFlags, SockFlag, SockType, SockaddrIn, }; use std::io::IoSlice; let sock = socket( AddressFamily::Inet, SockType::Datagram, SockFlag::empty(), None, ) .expect("socket failed"); let sock_addr = SockaddrIn::new(127, 0, 0, 1, 4000); bind(sock.as_raw_fd(), &sock_addr).expect("bind failed"); let slice = [1u8, 2, 3, 4, 5, 6, 7, 8]; let iov = [IoSlice::new(&slice)]; cfg_if! { if #[cfg(target_os = "netbsd")] { let pi = libc::in_pktinfo { ipi_ifindex: 0, /* Unspecified interface */ ipi_addr: libc::in_addr { s_addr: 0 }, }; } else { let pi = libc::in_pktinfo { ipi_ifindex: 0, /* Unspecified interface */ ipi_addr: libc::in_addr { s_addr: 0 }, ipi_spec_dst: sock_addr.as_ref().sin_addr, }; } } let cmsg = [ControlMessage::Ipv4PacketInfo(&pi)]; sendmsg( sock.as_raw_fd(), &iov, &cmsg, MsgFlags::empty(), Some(&sock_addr), ) .expect("sendmsg"); } // Verify `ControlMessage::Ipv6PacketInfo` for `sendmsg`. // This creates a (udp) socket bound to ip6-localhost, then sends a message to // itself but uses Ipv6PacketInfo to force the source address to be // ip6-localhost. // // This would be a more interesting test if we could assume that the test host // has more than one IP address (since we could select a different address to // test from). #[cfg(any( target_os = "linux", target_os = "macos", target_os = "netbsd", target_os = "freebsd" ))] #[test] pub fn test_sendmsg_ipv6packetinfo() { use nix::errno::Errno; use nix::sys::socket::{ bind, sendmsg, socket, AddressFamily, ControlMessage, MsgFlags, SockFlag, SockType, SockaddrIn6, }; use std::io::IoSlice; let sock = socket( AddressFamily::Inet6, SockType::Datagram, SockFlag::empty(), None, ) .expect("socket failed"); let std_sa = SocketAddrV6::from_str("[::1]:6000").unwrap(); let sock_addr: SockaddrIn6 = SockaddrIn6::from(std_sa); if let Err(Errno::EADDRNOTAVAIL) = bind(sock.as_raw_fd(), &sock_addr) { println!("IPv6 not available, skipping test."); return; } let slice = [1u8, 2, 3, 4, 5, 6, 7, 8]; let iov = [IoSlice::new(&slice)]; let pi = libc::in6_pktinfo { ipi6_ifindex: 0, /* Unspecified interface */ ipi6_addr: sock_addr.as_ref().sin6_addr, }; let cmsg = [ControlMessage::Ipv6PacketInfo(&pi)]; sendmsg::( sock.as_raw_fd(), &iov, &cmsg, MsgFlags::empty(), Some(&sock_addr), ) .expect("sendmsg"); } // Verify that ControlMessage::Ipv4SendSrcAddr works for sendmsg. This // creates a UDP socket bound to all local interfaces (0.0.0.0). It then // sends message to itself at 127.0.0.1 while explicitly specifying // 127.0.0.1 as the source address through an Ipv4SendSrcAddr // (IP_SENDSRCADDR) control message. // // Note that binding to 0.0.0.0 is *required* on FreeBSD; sendmsg // returns EINVAL otherwise. (See FreeBSD's ip(4) man page.) #[cfg(any( target_os = "netbsd", target_os = "freebsd", target_os = "openbsd", target_os = "dragonfly", ))] #[test] pub fn test_sendmsg_ipv4sendsrcaddr() { use nix::sys::socket::{ bind, sendmsg, socket, AddressFamily, ControlMessage, MsgFlags, SockFlag, SockType, SockaddrIn, }; use std::io::IoSlice; let sock = socket( AddressFamily::Inet, SockType::Datagram, SockFlag::empty(), None, ) .expect("socket failed"); let unspec_sock_addr = SockaddrIn::new(0, 0, 0, 0, 0); bind(sock.as_raw_fd(), &unspec_sock_addr).expect("bind failed"); let bound_sock_addr: SockaddrIn = getsockname(sock.as_raw_fd()).unwrap(); let localhost_sock_addr: SockaddrIn = SockaddrIn::new(127, 0, 0, 1, bound_sock_addr.port()); let slice = [1u8, 2, 3, 4, 5, 6, 7, 8]; let iov = [IoSlice::new(&slice)]; let cmsg = [ControlMessage::Ipv4SendSrcAddr( &localhost_sock_addr.as_ref().sin_addr, )]; sendmsg( sock.as_raw_fd(), &iov, &cmsg, MsgFlags::empty(), Some(&localhost_sock_addr), ) .expect("sendmsg"); } /// Tests that passing multiple fds using a single `ControlMessage` works. // Disable the test on emulated platforms due to a bug in QEMU versions < // 2.12.0. https://bugs.launchpad.net/qemu/+bug/1701808 #[cfg_attr(qemu, ignore)] #[test] fn test_scm_rights_single_cmsg_multiple_fds() { use nix::sys::socket::{ recvmsg, sendmsg, ControlMessage, ControlMessageOwned, MsgFlags, }; use std::io::{IoSlice, IoSliceMut}; use std::os::unix::io::{AsRawFd, RawFd}; use std::os::unix::net::UnixDatagram; use std::thread; let (send, receive) = UnixDatagram::pair().unwrap(); let thread = thread::spawn(move || { let mut buf = [0u8; 8]; let mut iovec = [IoSliceMut::new(&mut buf)]; let mut space = cmsg_space!([RawFd; 2]); let msg = recvmsg::<()>( receive.as_raw_fd(), &mut iovec, Some(&mut space), MsgFlags::empty(), ) .unwrap(); assert!(!msg .flags .intersects(MsgFlags::MSG_TRUNC | MsgFlags::MSG_CTRUNC)); let mut cmsgs = msg.cmsgs(); match cmsgs.next() { Some(ControlMessageOwned::ScmRights(fds)) => { assert_eq!( fds.len(), 2, "unexpected fd count (expected 2 fds, got {})", fds.len() ); } _ => panic!(), } assert!(cmsgs.next().is_none(), "unexpected control msg"); assert_eq!(msg.bytes, 8); assert_eq!(*iovec[0], [1u8, 2, 3, 4, 5, 6, 7, 8]); }); let slice = [1u8, 2, 3, 4, 5, 6, 7, 8]; let iov = [IoSlice::new(&slice)]; let fds = [libc::STDIN_FILENO, libc::STDOUT_FILENO]; // pass stdin and stdout let cmsg = [ControlMessage::ScmRights(&fds)]; sendmsg::<()>(send.as_raw_fd(), &iov, &cmsg, MsgFlags::empty(), None) .unwrap(); thread.join().unwrap(); } // Verify `sendmsg` builds a valid `msghdr` when passing an empty // `cmsgs` argument. This should result in a msghdr with a nullptr // msg_control field and a msg_controllen of 0 when calling into the // raw `sendmsg`. #[test] pub fn test_sendmsg_empty_cmsgs() { use nix::sys::socket::{ recvmsg, sendmsg, socketpair, AddressFamily, MsgFlags, SockFlag, SockType, }; use std::io::{IoSlice, IoSliceMut}; let (fd1, fd2) = socketpair( AddressFamily::Unix, SockType::Stream, None, SockFlag::empty(), ) .unwrap(); { let iov = [IoSlice::new(b"hello")]; assert_eq!( sendmsg::<()>(fd1.as_raw_fd(), &iov, &[], MsgFlags::empty(), None) .unwrap(), 5 ); } { let mut buf = [0u8; 5]; let mut iov = [IoSliceMut::new(&mut buf[..])]; let mut cmsgspace = cmsg_space!([RawFd; 1]); let msg = recvmsg::<()>( fd2.as_raw_fd(), &mut iov, Some(&mut cmsgspace), MsgFlags::empty(), ) .unwrap(); for _ in msg.cmsgs() { panic!("unexpected cmsg"); } assert!(!msg .flags .intersects(MsgFlags::MSG_TRUNC | MsgFlags::MSG_CTRUNC)); assert_eq!(msg.bytes, 5); } } #[cfg(any( target_os = "android", target_os = "linux", target_os = "freebsd", target_os = "dragonfly", ))] #[test] fn test_scm_credentials() { use nix::sys::socket::{ recvmsg, sendmsg, socketpair, AddressFamily, ControlMessage, ControlMessageOwned, MsgFlags, SockFlag, SockType, UnixCredentials, }; #[cfg(any(target_os = "android", target_os = "linux"))] use nix::sys::socket::{setsockopt, sockopt::PassCred}; use nix::unistd::{getgid, getpid, getuid}; use std::io::{IoSlice, IoSliceMut}; let (send, recv) = socketpair( AddressFamily::Unix, SockType::Stream, None, SockFlag::empty(), ) .unwrap(); #[cfg(any(target_os = "android", target_os = "linux"))] setsockopt(&recv, PassCred, &true).unwrap(); { let iov = [IoSlice::new(b"hello")]; #[cfg(any(target_os = "android", target_os = "linux"))] let cred = UnixCredentials::new(); #[cfg(any(target_os = "android", target_os = "linux"))] let cmsg = ControlMessage::ScmCredentials(&cred); #[cfg(any(target_os = "freebsd", target_os = "dragonfly"))] let cmsg = ControlMessage::ScmCreds; assert_eq!( sendmsg::<()>( send.as_raw_fd(), &iov, &[cmsg], MsgFlags::empty(), None ) .unwrap(), 5 ); } { let mut buf = [0u8; 5]; let mut iov = [IoSliceMut::new(&mut buf[..])]; let mut cmsgspace = cmsg_space!(UnixCredentials); let msg = recvmsg::<()>( recv.as_raw_fd(), &mut iov, Some(&mut cmsgspace), MsgFlags::empty(), ) .unwrap(); let mut received_cred = None; for cmsg in msg.cmsgs() { let cred = match cmsg { #[cfg(any(target_os = "android", target_os = "linux"))] ControlMessageOwned::ScmCredentials(cred) => cred, #[cfg(any(target_os = "freebsd", target_os = "dragonfly"))] ControlMessageOwned::ScmCreds(cred) => cred, other => panic!("unexpected cmsg {other:?}"), }; assert!(received_cred.is_none()); assert_eq!(cred.pid(), getpid().as_raw()); assert_eq!(cred.uid(), getuid().as_raw()); assert_eq!(cred.gid(), getgid().as_raw()); received_cred = Some(cred); } received_cred.expect("no creds received"); assert_eq!(msg.bytes, 5); assert!(!msg .flags .intersects(MsgFlags::MSG_TRUNC | MsgFlags::MSG_CTRUNC)); } } /// Ensure that we can send `SCM_CREDENTIALS` and `SCM_RIGHTS` with a single /// `sendmsg` call. #[cfg(any(target_os = "android", target_os = "linux"))] // qemu's handling of multiple cmsgs is bugged, ignore tests under emulation // see https://bugs.launchpad.net/qemu/+bug/1781280 #[cfg_attr(qemu, ignore)] #[test] fn test_scm_credentials_and_rights() { let space = cmsg_space!(libc::ucred, RawFd); test_impl_scm_credentials_and_rights(space); } /// Ensure that passing a an oversized control message buffer to recvmsg /// still works. #[cfg(any(target_os = "android", target_os = "linux"))] // qemu's handling of multiple cmsgs is bugged, ignore tests under emulation // see https://bugs.launchpad.net/qemu/+bug/1781280 #[cfg_attr(qemu, ignore)] #[test] fn test_too_large_cmsgspace() { let space = vec![0u8; 1024]; test_impl_scm_credentials_and_rights(space); } #[cfg(any(target_os = "android", target_os = "linux"))] fn test_impl_scm_credentials_and_rights(mut space: Vec) { use libc::ucred; use nix::sys::socket::sockopt::PassCred; use nix::sys::socket::{ recvmsg, sendmsg, setsockopt, socketpair, ControlMessage, ControlMessageOwned, MsgFlags, SockFlag, SockType, }; use nix::unistd::{close, getgid, getpid, getuid, pipe, write}; use std::io::{IoSlice, IoSliceMut}; let (send, recv) = socketpair( AddressFamily::Unix, SockType::Stream, None, SockFlag::empty(), ) .unwrap(); setsockopt(&recv, PassCred, &true).unwrap(); let (r, w) = pipe().unwrap(); let mut received_r: Option = None; { let iov = [IoSlice::new(b"hello")]; let cred = ucred { pid: getpid().as_raw(), uid: getuid().as_raw(), gid: getgid().as_raw(), } .into(); let fds = [r]; let cmsgs = [ ControlMessage::ScmCredentials(&cred), ControlMessage::ScmRights(&fds), ]; assert_eq!( sendmsg::<()>( send.as_raw_fd(), &iov, &cmsgs, MsgFlags::empty(), None ) .unwrap(), 5 ); close(r).unwrap(); } { let mut buf = [0u8; 5]; let mut iov = [IoSliceMut::new(&mut buf[..])]; let msg = recvmsg::<()>( recv.as_raw_fd(), &mut iov, Some(&mut space), MsgFlags::empty(), ) .unwrap(); let mut received_cred = None; assert_eq!(msg.cmsgs().count(), 2, "expected 2 cmsgs"); for cmsg in msg.cmsgs() { match cmsg { ControlMessageOwned::ScmRights(fds) => { assert_eq!(received_r, None, "already received fd"); assert_eq!(fds.len(), 1); received_r = Some(fds[0]); } ControlMessageOwned::ScmCredentials(cred) => { assert!(received_cred.is_none()); assert_eq!(cred.pid(), getpid().as_raw()); assert_eq!(cred.uid(), getuid().as_raw()); assert_eq!(cred.gid(), getgid().as_raw()); received_cred = Some(cred); } _ => panic!("unexpected cmsg"), } } received_cred.expect("no creds received"); assert_eq!(msg.bytes, 5); assert!(!msg .flags .intersects(MsgFlags::MSG_TRUNC | MsgFlags::MSG_CTRUNC)); } let received_r = received_r.expect("Did not receive passed fd"); // Ensure that the received file descriptor works write(w.as_raw_fd(), b"world").unwrap(); let mut buf = [0u8; 5]; read(received_r.as_raw_fd(), &mut buf).unwrap(); assert_eq!(&buf[..], b"world"); close(received_r).unwrap(); close(w).unwrap(); } // Test creating and using named unix domain sockets #[test] pub fn test_named_unixdomain() { use nix::sys::socket::{accept, bind, connect, listen, socket, UnixAddr}; use nix::sys::socket::{SockFlag, SockType}; use nix::unistd::{read, write}; use std::thread; let tempdir = tempfile::tempdir().unwrap(); let sockname = tempdir.path().join("sock"); let s1 = socket( AddressFamily::Unix, SockType::Stream, SockFlag::empty(), None, ) .expect("socket failed"); let sockaddr = UnixAddr::new(&sockname).unwrap(); bind(s1.as_raw_fd(), &sockaddr).expect("bind failed"); listen(&s1, 10).expect("listen failed"); let thr = thread::spawn(move || { let s2 = socket( AddressFamily::Unix, SockType::Stream, SockFlag::empty(), None, ) .expect("socket failed"); connect(s2.as_raw_fd(), &sockaddr).expect("connect failed"); write(s2.as_raw_fd(), b"hello").expect("write failed"); }); let s3 = accept(s1.as_raw_fd()).expect("accept failed"); let mut buf = [0; 5]; read(s3.as_raw_fd(), &mut buf).unwrap(); thr.join().unwrap(); assert_eq!(&buf[..], b"hello"); } // Test using unnamed unix domain addresses #[cfg(any(target_os = "android", target_os = "linux"))] #[test] pub fn test_unnamed_unixdomain() { use nix::sys::socket::{getsockname, socketpair}; use nix::sys::socket::{SockFlag, SockType}; let (fd_1, _fd_2) = socketpair( AddressFamily::Unix, SockType::Stream, None, SockFlag::empty(), ) .expect("socketpair failed"); let addr_1: UnixAddr = getsockname(fd_1.as_raw_fd()).expect("getsockname failed"); assert!(addr_1.is_unnamed()); } // Test creating and using unnamed unix domain addresses for autobinding sockets #[cfg(any(target_os = "android", target_os = "linux"))] #[test] pub fn test_unnamed_unixdomain_autobind() { use nix::sys::socket::{bind, getsockname, socket}; use nix::sys::socket::{SockFlag, SockType}; let fd = socket( AddressFamily::Unix, SockType::Stream, SockFlag::empty(), None, ) .expect("socket failed"); // unix(7): "If a bind(2) call specifies addrlen as `sizeof(sa_family_t)`, or [...], then the // socket is autobound to an abstract address" bind(fd.as_raw_fd(), &UnixAddr::new_unnamed()).expect("bind failed"); let addr: UnixAddr = getsockname(fd.as_raw_fd()).expect("getsockname failed"); let addr = addr.as_abstract().unwrap(); // changed from 8 to 5 bytes in Linux 2.3.15, and rust's minimum supported Linux version is 3.2 // (as of 2022-11) assert_eq!(addr.len(), 5); } // Test creating and using named system control sockets #[cfg(any(target_os = "macos", target_os = "ios"))] #[test] pub fn test_syscontrol() { use nix::errno::Errno; use nix::sys::socket::{ socket, SockFlag, SockProtocol, SockType, SysControlAddr, }; let fd = socket( AddressFamily::System, SockType::Datagram, SockFlag::empty(), SockProtocol::KextControl, ) .expect("socket failed"); SysControlAddr::from_name(fd.as_raw_fd(), "com.apple.net.utun_control", 0) .expect("resolving sys_control name failed"); assert_eq!( SysControlAddr::from_name(fd.as_raw_fd(), "foo.bar.lol", 0).err(), Some(Errno::ENOENT) ); // requires root privileges // connect(fd.as_raw_fd(), &sockaddr).expect("connect failed"); } #[cfg(any( target_os = "android", target_os = "freebsd", target_os = "ios", target_os = "linux", target_os = "macos", target_os = "netbsd", target_os = "openbsd", ))] fn loopback_address( family: AddressFamily, ) -> Option { use nix::ifaddrs::getifaddrs; use nix::net::if_::*; use nix::sys::socket::SockaddrLike; use std::io; use std::io::Write; let mut addrs = match getifaddrs() { Ok(iter) => iter, Err(e) => { let stdioerr = io::stderr(); let mut handle = stdioerr.lock(); writeln!(handle, "getifaddrs: {e:?}").unwrap(); return None; } }; // return first address matching family addrs.find(|ifaddr| { ifaddr.flags.contains(InterfaceFlags::IFF_LOOPBACK) && ifaddr.address.as_ref().and_then(SockaddrLike::family) == Some(family) }) } #[cfg(any( target_os = "android", target_os = "ios", target_os = "linux", target_os = "macos", target_os = "netbsd", ))] // qemu doesn't seem to be emulating this correctly in these architectures #[cfg_attr( all( qemu, any( target_arch = "mips", target_arch = "mips64", target_arch = "powerpc64", ) ), ignore )] #[test] pub fn test_recv_ipv4pktinfo() { use nix::net::if_::*; use nix::sys::socket::sockopt::Ipv4PacketInfo; use nix::sys::socket::{bind, SockFlag, SockType, SockaddrIn}; use nix::sys::socket::{getsockname, setsockopt, socket}; use nix::sys::socket::{recvmsg, sendmsg, ControlMessageOwned, MsgFlags}; use std::io::{IoSlice, IoSliceMut}; let lo_ifaddr = loopback_address(AddressFamily::Inet); let (lo_name, lo) = match lo_ifaddr { Some(ifaddr) => ( ifaddr.interface_name, ifaddr.address.expect("Expect IPv4 address on interface"), ), None => return, }; let receive = socket( AddressFamily::Inet, SockType::Datagram, SockFlag::empty(), None, ) .expect("receive socket failed"); bind(receive.as_raw_fd(), &lo).expect("bind failed"); let sa: SockaddrIn = getsockname(receive.as_raw_fd()).expect("getsockname failed"); setsockopt(&receive, Ipv4PacketInfo, &true).expect("setsockopt failed"); { let slice = [1u8, 2, 3, 4, 5, 6, 7, 8]; let iov = [IoSlice::new(&slice)]; let send = socket( AddressFamily::Inet, SockType::Datagram, SockFlag::empty(), None, ) .expect("send socket failed"); sendmsg(send.as_raw_fd(), &iov, &[], MsgFlags::empty(), Some(&sa)) .expect("sendmsg failed"); } { let mut buf = [0u8; 8]; let mut iovec = [IoSliceMut::new(&mut buf)]; let mut space = cmsg_space!(libc::in_pktinfo); let msg = recvmsg::<()>( receive.as_raw_fd(), &mut iovec, Some(&mut space), MsgFlags::empty(), ) .expect("recvmsg failed"); assert!(!msg .flags .intersects(MsgFlags::MSG_TRUNC | MsgFlags::MSG_CTRUNC)); let mut cmsgs = msg.cmsgs(); if let Some(ControlMessageOwned::Ipv4PacketInfo(pktinfo)) = cmsgs.next() { let i = if_nametoindex(lo_name.as_bytes()).expect("if_nametoindex"); assert_eq!( pktinfo.ipi_ifindex as libc::c_uint, i, "unexpected ifindex (expected {}, got {})", i, pktinfo.ipi_ifindex ); } assert!(cmsgs.next().is_none(), "unexpected additional control msg"); assert_eq!(msg.bytes, 8); assert_eq!(*iovec[0], [1u8, 2, 3, 4, 5, 6, 7, 8]); } } #[cfg(any( target_os = "freebsd", target_os = "ios", target_os = "macos", target_os = "netbsd", target_os = "openbsd", ))] // qemu doesn't seem to be emulating this correctly in these architectures #[cfg_attr( all( qemu, any( target_arch = "mips", target_arch = "mips64", target_arch = "powerpc64", ) ), ignore )] #[test] pub fn test_recvif() { use nix::net::if_::*; use nix::sys::socket::sockopt::{Ipv4RecvDstAddr, Ipv4RecvIf}; use nix::sys::socket::{bind, SockFlag, SockType, SockaddrIn}; use nix::sys::socket::{getsockname, setsockopt, socket}; use nix::sys::socket::{recvmsg, sendmsg, ControlMessageOwned, MsgFlags}; use std::io::{IoSlice, IoSliceMut}; let lo_ifaddr = loopback_address(AddressFamily::Inet); let (lo_name, lo) = match lo_ifaddr { Some(ifaddr) => ( ifaddr.interface_name, ifaddr.address.expect("Expect IPv4 address on interface"), ), None => return, }; let receive = socket( AddressFamily::Inet, SockType::Datagram, SockFlag::empty(), None, ) .expect("receive socket failed"); bind(receive.as_raw_fd(), &lo).expect("bind failed"); let sa: SockaddrIn = getsockname(receive.as_raw_fd()).expect("getsockname failed"); setsockopt(&receive, Ipv4RecvIf, &true) .expect("setsockopt IP_RECVIF failed"); setsockopt(&receive, Ipv4RecvDstAddr, &true) .expect("setsockopt IP_RECVDSTADDR failed"); { let slice = [1u8, 2, 3, 4, 5, 6, 7, 8]; let iov = [IoSlice::new(&slice)]; let send = socket( AddressFamily::Inet, SockType::Datagram, SockFlag::empty(), None, ) .expect("send socket failed"); sendmsg(send.as_raw_fd(), &iov, &[], MsgFlags::empty(), Some(&sa)) .expect("sendmsg failed"); } { let mut buf = [0u8; 8]; let mut iovec = [IoSliceMut::new(&mut buf)]; let mut space = cmsg_space!(libc::sockaddr_dl, libc::in_addr); let msg = recvmsg::<()>( receive.as_raw_fd(), &mut iovec, Some(&mut space), MsgFlags::empty(), ) .expect("recvmsg failed"); assert!(!msg .flags .intersects(MsgFlags::MSG_TRUNC | MsgFlags::MSG_CTRUNC)); assert_eq!(msg.cmsgs().count(), 2, "expected 2 cmsgs"); let mut rx_recvif = false; let mut rx_recvdstaddr = false; for cmsg in msg.cmsgs() { match cmsg { ControlMessageOwned::Ipv4RecvIf(dl) => { rx_recvif = true; let i = if_nametoindex(lo_name.as_bytes()) .expect("if_nametoindex"); assert_eq!( dl.sdl_index as libc::c_uint, i, "unexpected ifindex (expected {}, got {})", i, dl.sdl_index ); } ControlMessageOwned::Ipv4RecvDstAddr(addr) => { rx_recvdstaddr = true; if let Some(sin) = lo.as_sockaddr_in() { assert_eq!(sin.as_ref().sin_addr.s_addr, addr.s_addr, "unexpected destination address (expected {}, got {})", sin.as_ref().sin_addr.s_addr, addr.s_addr); } else { panic!("unexpected Sockaddr"); } } _ => panic!("unexpected additional control msg"), } } assert!(rx_recvif); assert!(rx_recvdstaddr); assert_eq!(msg.bytes, 8); assert_eq!(*iovec[0], [1u8, 2, 3, 4, 5, 6, 7, 8]); } } #[cfg(any(target_os = "android", target_os = "freebsd", target_os = "linux"))] #[cfg_attr(qemu, ignore)] #[test] pub fn test_recvif_ipv4() { use nix::sys::socket::sockopt::Ipv4OrigDstAddr; use nix::sys::socket::{bind, SockFlag, SockType, SockaddrIn}; use nix::sys::socket::{getsockname, setsockopt, socket}; use nix::sys::socket::{recvmsg, sendmsg, ControlMessageOwned, MsgFlags}; use std::io::{IoSlice, IoSliceMut}; let lo_ifaddr = loopback_address(AddressFamily::Inet); let (_lo_name, lo) = match lo_ifaddr { Some(ifaddr) => ( ifaddr.interface_name, ifaddr.address.expect("Expect IPv4 address on interface"), ), None => return, }; let receive = socket( AddressFamily::Inet, SockType::Datagram, SockFlag::empty(), None, ) .expect("receive socket failed"); bind(receive.as_raw_fd(), &lo).expect("bind failed"); let sa: SockaddrIn = getsockname(receive.as_raw_fd()).expect("getsockname failed"); setsockopt(&receive, Ipv4OrigDstAddr, &true) .expect("setsockopt IP_ORIGDSTADDR failed"); { let slice = [1u8, 2, 3, 4, 5, 6, 7, 8]; let iov = [IoSlice::new(&slice)]; let send = socket( AddressFamily::Inet, SockType::Datagram, SockFlag::empty(), None, ) .expect("send socket failed"); sendmsg(send.as_raw_fd(), &iov, &[], MsgFlags::empty(), Some(&sa)) .expect("sendmsg failed"); } { let mut buf = [0u8; 8]; let mut iovec = [IoSliceMut::new(&mut buf)]; let mut space = cmsg_space!(libc::sockaddr_in); let msg = recvmsg::<()>( receive.as_raw_fd(), &mut iovec, Some(&mut space), MsgFlags::empty(), ) .expect("recvmsg failed"); assert!(!msg .flags .intersects(MsgFlags::MSG_TRUNC | MsgFlags::MSG_CTRUNC)); assert_eq!(msg.cmsgs().count(), 1, "expected 1 cmsgs"); let mut rx_recvorigdstaddr = false; for cmsg in msg.cmsgs() { match cmsg { ControlMessageOwned::Ipv4OrigDstAddr(addr) => { rx_recvorigdstaddr = true; if let Some(sin) = lo.as_sockaddr_in() { assert_eq!(sin.as_ref().sin_addr.s_addr, addr.sin_addr.s_addr, "unexpected destination address (expected {}, got {})", sin.as_ref().sin_addr.s_addr, addr.sin_addr.s_addr); } else { panic!("unexpected Sockaddr"); } } _ => panic!("unexpected additional control msg"), } } assert!(rx_recvorigdstaddr); assert_eq!(msg.bytes, 8); assert_eq!(*iovec[0], [1u8, 2, 3, 4, 5, 6, 7, 8]); } } #[cfg(any(target_os = "android", target_os = "freebsd", target_os = "linux"))] #[cfg_attr(qemu, ignore)] #[test] pub fn test_recvif_ipv6() { use nix::sys::socket::sockopt::Ipv6OrigDstAddr; use nix::sys::socket::{bind, SockFlag, SockType, SockaddrIn6}; use nix::sys::socket::{getsockname, setsockopt, socket}; use nix::sys::socket::{recvmsg, sendmsg, ControlMessageOwned, MsgFlags}; use std::io::{IoSlice, IoSliceMut}; let lo_ifaddr = loopback_address(AddressFamily::Inet6); let (_lo_name, lo) = match lo_ifaddr { Some(ifaddr) => ( ifaddr.interface_name, ifaddr.address.expect("Expect IPv6 address on interface"), ), None => return, }; let receive = socket( AddressFamily::Inet6, SockType::Datagram, SockFlag::empty(), None, ) .expect("receive socket failed"); bind(receive.as_raw_fd(), &lo).expect("bind failed"); let sa: SockaddrIn6 = getsockname(receive.as_raw_fd()).expect("getsockname failed"); setsockopt(&receive, Ipv6OrigDstAddr, &true) .expect("setsockopt IP_ORIGDSTADDR failed"); { let slice = [1u8, 2, 3, 4, 5, 6, 7, 8]; let iov = [IoSlice::new(&slice)]; let send = socket( AddressFamily::Inet6, SockType::Datagram, SockFlag::empty(), None, ) .expect("send socket failed"); sendmsg(send.as_raw_fd(), &iov, &[], MsgFlags::empty(), Some(&sa)) .expect("sendmsg failed"); } { let mut buf = [0u8; 8]; let mut iovec = [IoSliceMut::new(&mut buf)]; let mut space = cmsg_space!(libc::sockaddr_in6); let msg = recvmsg::<()>( receive.as_raw_fd(), &mut iovec, Some(&mut space), MsgFlags::empty(), ) .expect("recvmsg failed"); assert!(!msg .flags .intersects(MsgFlags::MSG_TRUNC | MsgFlags::MSG_CTRUNC)); assert_eq!(msg.cmsgs().count(), 1, "expected 1 cmsgs"); let mut rx_recvorigdstaddr = false; for cmsg in msg.cmsgs() { match cmsg { ControlMessageOwned::Ipv6OrigDstAddr(addr) => { rx_recvorigdstaddr = true; if let Some(sin) = lo.as_sockaddr_in6() { assert_eq!(sin.as_ref().sin6_addr.s6_addr, addr.sin6_addr.s6_addr, "unexpected destination address (expected {:?}, got {:?})", sin.as_ref().sin6_addr.s6_addr, addr.sin6_addr.s6_addr); } else { panic!("unexpected Sockaddr"); } } _ => panic!("unexpected additional control msg"), } } assert!(rx_recvorigdstaddr); assert_eq!(msg.bytes, 8); assert_eq!(*iovec[0], [1u8, 2, 3, 4, 5, 6, 7, 8]); } } #[cfg(any( target_os = "android", target_os = "freebsd", target_os = "ios", target_os = "linux", target_os = "macos", target_os = "netbsd", target_os = "openbsd", ))] // qemu doesn't seem to be emulating this correctly in these architectures #[cfg_attr( all( qemu, any( target_arch = "mips", target_arch = "mips64", target_arch = "powerpc64", ) ), ignore )] #[test] pub fn test_recv_ipv6pktinfo() { use nix::net::if_::*; use nix::sys::socket::sockopt::Ipv6RecvPacketInfo; use nix::sys::socket::{bind, SockFlag, SockType, SockaddrIn6}; use nix::sys::socket::{getsockname, setsockopt, socket}; use nix::sys::socket::{recvmsg, sendmsg, ControlMessageOwned, MsgFlags}; use std::io::{IoSlice, IoSliceMut}; let lo_ifaddr = loopback_address(AddressFamily::Inet6); let (lo_name, lo) = match lo_ifaddr { Some(ifaddr) => ( ifaddr.interface_name, ifaddr.address.expect("Expect IPv6 address on interface"), ), None => return, }; let receive = socket( AddressFamily::Inet6, SockType::Datagram, SockFlag::empty(), None, ) .expect("receive socket failed"); bind(receive.as_raw_fd(), &lo).expect("bind failed"); let sa: SockaddrIn6 = getsockname(receive.as_raw_fd()).expect("getsockname failed"); setsockopt(&receive, Ipv6RecvPacketInfo, &true).expect("setsockopt failed"); { let slice = [1u8, 2, 3, 4, 5, 6, 7, 8]; let iov = [IoSlice::new(&slice)]; let send = socket( AddressFamily::Inet6, SockType::Datagram, SockFlag::empty(), None, ) .expect("send socket failed"); sendmsg(send.as_raw_fd(), &iov, &[], MsgFlags::empty(), Some(&sa)) .expect("sendmsg failed"); } { let mut buf = [0u8; 8]; let mut iovec = [IoSliceMut::new(&mut buf)]; let mut space = cmsg_space!(libc::in6_pktinfo); let msg = recvmsg::<()>( receive.as_raw_fd(), &mut iovec, Some(&mut space), MsgFlags::empty(), ) .expect("recvmsg failed"); assert!(!msg .flags .intersects(MsgFlags::MSG_TRUNC | MsgFlags::MSG_CTRUNC)); let mut cmsgs = msg.cmsgs(); if let Some(ControlMessageOwned::Ipv6PacketInfo(pktinfo)) = cmsgs.next() { let i = if_nametoindex(lo_name.as_bytes()).expect("if_nametoindex"); assert_eq!( pktinfo.ipi6_ifindex as libc::c_uint, i, "unexpected ifindex (expected {}, got {})", i, pktinfo.ipi6_ifindex ); } assert!(cmsgs.next().is_none(), "unexpected additional control msg"); assert_eq!(msg.bytes, 8); assert_eq!(*iovec[0], [1u8, 2, 3, 4, 5, 6, 7, 8]); } } #[cfg(any(target_os = "android", target_os = "linux"))] #[test] pub fn test_vsock() { use nix::sys::socket::SockaddrLike; use nix::sys::socket::{AddressFamily, VsockAddr}; use std::mem; let port: u32 = 3000; let addr_local = VsockAddr::new(libc::VMADDR_CID_LOCAL, port); assert_eq!(addr_local.cid(), libc::VMADDR_CID_LOCAL); assert_eq!(addr_local.port(), port); let addr_any = VsockAddr::new(libc::VMADDR_CID_ANY, libc::VMADDR_PORT_ANY); assert_eq!(addr_any.cid(), libc::VMADDR_CID_ANY); assert_eq!(addr_any.port(), libc::VMADDR_PORT_ANY); assert_ne!(addr_local, addr_any); assert_ne!(calculate_hash(&addr_local), calculate_hash(&addr_any)); let addr1 = VsockAddr::new(libc::VMADDR_CID_HOST, port); let addr2 = VsockAddr::new(libc::VMADDR_CID_HOST, port); assert_eq!(addr1, addr2); assert_eq!(calculate_hash(&addr1), calculate_hash(&addr2)); let addr3 = unsafe { VsockAddr::from_raw( addr2.as_ref() as *const libc::sockaddr_vm as *const libc::sockaddr, Some(mem::size_of::().try_into().unwrap()), ) } .unwrap(); assert_eq!( addr3.as_ref().svm_family, AddressFamily::Vsock as libc::sa_family_t ); assert_eq!(addr3.as_ref().svm_cid, addr1.cid()); assert_eq!(addr3.as_ref().svm_port, addr1.port()); } #[cfg(target_os = "macos")] #[test] pub fn test_vsock() { use nix::sys::socket::SockaddrLike; use nix::sys::socket::{AddressFamily, VsockAddr}; use std::mem; let port: u32 = 3000; // macOS doesn't have a VMADDR_CID_LOCAL, so test with host again let addr_host = VsockAddr::new(libc::VMADDR_CID_HOST, port); assert_eq!(addr_host.cid(), libc::VMADDR_CID_HOST); assert_eq!(addr_host.port(), port); let addr_any = VsockAddr::new(libc::VMADDR_CID_ANY, libc::VMADDR_PORT_ANY); assert_eq!(addr_any.cid(), libc::VMADDR_CID_ANY); assert_eq!(addr_any.port(), libc::VMADDR_PORT_ANY); assert_ne!(addr_host, addr_any); assert_ne!(calculate_hash(&addr_host), calculate_hash(&addr_any)); let addr1 = VsockAddr::new(libc::VMADDR_CID_HOST, port); let addr2 = VsockAddr::new(libc::VMADDR_CID_HOST, port); assert_eq!(addr1, addr2); assert_eq!(calculate_hash(&addr1), calculate_hash(&addr2)); let addr3 = unsafe { VsockAddr::from_raw( addr2.as_ref() as *const libc::sockaddr_vm as *const libc::sockaddr, Some(mem::size_of::().try_into().unwrap()), ) } .unwrap(); assert_eq!( addr3.as_ref().svm_family, AddressFamily::Vsock as libc::sa_family_t ); let cid = addr3.as_ref().svm_cid; let port = addr3.as_ref().svm_port; assert_eq!(cid, addr1.cid()); assert_eq!(port, addr1.port()); } // Disable the test on emulated platforms because it fails in Cirrus-CI. Lack // of QEMU support is suspected. #[cfg_attr(qemu, ignore)] #[cfg(target_os = "linux")] #[test] fn test_recvmsg_timestampns() { use nix::sys::socket::*; use nix::sys::time::*; use std::io::{IoSlice, IoSliceMut}; use std::time::*; // Set up let message = "Ohayō!".as_bytes(); let in_socket = socket( AddressFamily::Inet, SockType::Datagram, SockFlag::empty(), None, ) .unwrap(); setsockopt(&in_socket, sockopt::ReceiveTimestampns, &true).unwrap(); let localhost = SockaddrIn::new(127, 0, 0, 1, 0); bind(in_socket.as_raw_fd(), &localhost).unwrap(); let address: SockaddrIn = getsockname(in_socket.as_raw_fd()).unwrap(); // Get initial time let time0 = SystemTime::now(); // Send the message let iov = [IoSlice::new(message)]; let flags = MsgFlags::empty(); let l = sendmsg(in_socket.as_raw_fd(), &iov, &[], flags, Some(&address)) .unwrap(); assert_eq!(message.len(), l); // Receive the message let mut buffer = vec![0u8; message.len()]; let mut cmsgspace = nix::cmsg_space!(TimeSpec); let mut iov = [IoSliceMut::new(&mut buffer)]; let r = recvmsg::<()>( in_socket.as_raw_fd(), &mut iov, Some(&mut cmsgspace), flags, ) .unwrap(); let rtime = match r.cmsgs().next() { Some(ControlMessageOwned::ScmTimestampns(rtime)) => rtime, Some(_) => panic!("Unexpected control message"), None => panic!("No control message"), }; // Check the final time let time1 = SystemTime::now(); // the packet's received timestamp should lie in-between the two system // times, unless the system clock was adjusted in the meantime. let rduration = Duration::new(rtime.tv_sec() as u64, rtime.tv_nsec() as u32); assert!(time0.duration_since(UNIX_EPOCH).unwrap() <= rduration); assert!(rduration <= time1.duration_since(UNIX_EPOCH).unwrap()); } // Disable the test on emulated platforms because it fails in Cirrus-CI. Lack // of QEMU support is suspected. #[cfg_attr(qemu, ignore)] #[cfg(target_os = "linux")] #[test] fn test_recvmmsg_timestampns() { use nix::sys::socket::*; use nix::sys::time::*; use std::io::{IoSlice, IoSliceMut}; use std::time::*; // Set up let message = "Ohayō!".as_bytes(); let in_socket = socket( AddressFamily::Inet, SockType::Datagram, SockFlag::empty(), None, ) .unwrap(); setsockopt(&in_socket, sockopt::ReceiveTimestampns, &true).unwrap(); let localhost = SockaddrIn::from_str("127.0.0.1:0").unwrap(); bind(in_socket.as_raw_fd(), &localhost).unwrap(); let address: SockaddrIn = getsockname(in_socket.as_raw_fd()).unwrap(); // Get initial time let time0 = SystemTime::now(); // Send the message let iov = [IoSlice::new(message)]; let flags = MsgFlags::empty(); let l = sendmsg(in_socket.as_raw_fd(), &iov, &[], flags, Some(&address)) .unwrap(); assert_eq!(message.len(), l); // Receive the message let mut buffer = vec![0u8; message.len()]; let cmsgspace = nix::cmsg_space!(TimeSpec); let iov = vec![[IoSliceMut::new(&mut buffer)]]; let mut data = MultiHeaders::preallocate(1, Some(cmsgspace)); let r: Vec> = recvmmsg(in_socket.as_raw_fd(), &mut data, iov.iter(), flags, None) .unwrap() .collect(); let rtime = match r[0].cmsgs().next() { Some(ControlMessageOwned::ScmTimestampns(rtime)) => rtime, Some(_) => panic!("Unexpected control message"), None => panic!("No control message"), }; // Check the final time let time1 = SystemTime::now(); // the packet's received timestamp should lie in-between the two system // times, unless the system clock was adjusted in the meantime. let rduration = Duration::new(rtime.tv_sec() as u64, rtime.tv_nsec() as u32); assert!(time0.duration_since(UNIX_EPOCH).unwrap() <= rduration); assert!(rduration <= time1.duration_since(UNIX_EPOCH).unwrap()); } // Disable the test on emulated platforms because it fails in Cirrus-CI. Lack // of QEMU support is suspected. #[cfg_attr(qemu, ignore)] #[cfg(any(target_os = "android", target_os = "fuchsia", target_os = "linux"))] #[test] fn test_recvmsg_rxq_ovfl() { use nix::sys::socket::sockopt::{RcvBuf, RxqOvfl}; use nix::sys::socket::*; use nix::Error; use std::io::{IoSlice, IoSliceMut}; let message = [0u8; 2048]; let bufsize = message.len() * 2; let in_socket = socket( AddressFamily::Inet, SockType::Datagram, SockFlag::empty(), None, ) .unwrap(); let out_socket = socket( AddressFamily::Inet, SockType::Datagram, SockFlag::empty(), None, ) .unwrap(); let localhost = SockaddrIn::from_str("127.0.0.1:0").unwrap(); bind(in_socket.as_raw_fd(), &localhost).unwrap(); let address: SockaddrIn = getsockname(in_socket.as_raw_fd()).unwrap(); connect(out_socket.as_raw_fd(), &address).unwrap(); // Set SO_RXQ_OVFL flag. setsockopt(&in_socket, RxqOvfl, &1).unwrap(); // Set the receiver buffer size to hold only 2 messages. setsockopt(&in_socket, RcvBuf, &bufsize).unwrap(); let mut drop_counter = 0; for _ in 0..2 { let iov = [IoSlice::new(&message)]; let flags = MsgFlags::empty(); // Send the 3 messages (the receiver buffer can only hold 2 messages) // to create an overflow. for _ in 0..3 { let l = sendmsg( out_socket.as_raw_fd(), &iov, &[], flags, Some(&address), ) .unwrap(); assert_eq!(message.len(), l); } // Receive the message and check the drop counter if any. loop { let mut buffer = vec![0u8; message.len()]; let mut cmsgspace = nix::cmsg_space!(u32); let mut iov = [IoSliceMut::new(&mut buffer)]; match recvmsg::<()>( in_socket.as_raw_fd(), &mut iov, Some(&mut cmsgspace), MsgFlags::MSG_DONTWAIT, ) { Ok(r) => { drop_counter = match r.cmsgs().next() { Some(ControlMessageOwned::RxqOvfl(drop_counter)) => { drop_counter } Some(_) => panic!("Unexpected control message"), None => 0, }; } Err(Error::EAGAIN) => { break; } _ => { panic!("unknown recvmsg() error"); } } } } // One packet lost. assert_eq!(drop_counter, 1); } #[cfg(any(target_os = "linux", target_os = "android",))] mod linux_errqueue { use super::FromStr; use nix::sys::socket::*; use std::os::unix::io::AsRawFd; // Send a UDP datagram to a bogus destination address and observe an ICMP error (v4). // // Disable the test on QEMU because QEMU emulation of IP_RECVERR is broken (as documented on PR // #1514). #[cfg_attr(qemu, ignore)] #[test] fn test_recverr_v4() { #[repr(u8)] enum IcmpTypes { DestUnreach = 3, // ICMP_DEST_UNREACH } #[repr(u8)] enum IcmpUnreachCodes { PortUnreach = 3, // ICMP_PORT_UNREACH } test_recverr_impl::( "127.0.0.1:6800", AddressFamily::Inet, sockopt::Ipv4RecvErr, libc::SO_EE_ORIGIN_ICMP, IcmpTypes::DestUnreach as u8, IcmpUnreachCodes::PortUnreach as u8, // Closure handles protocol-specific testing and returns generic sock_extended_err for // protocol-independent test impl. |cmsg| { if let ControlMessageOwned::Ipv4RecvErr(ext_err, err_addr) = cmsg { if let Some(origin) = err_addr { // Validate that our network error originated from 127.0.0.1:0. assert_eq!(origin.sin_family, AddressFamily::Inet as _); assert_eq!( origin.sin_addr.s_addr, u32::from_be(0x7f000001) ); assert_eq!(origin.sin_port, 0); } else { panic!("Expected some error origin"); } *ext_err } else { panic!("Unexpected control message {cmsg:?}"); } }, ) } // Essentially the same test as v4. // // Disable the test on QEMU because QEMU emulation of IPV6_RECVERR is broken (as documented on // PR #1514). #[cfg_attr(qemu, ignore)] #[test] fn test_recverr_v6() { #[repr(u8)] enum IcmpV6Types { DestUnreach = 1, // ICMPV6_DEST_UNREACH } #[repr(u8)] enum IcmpV6UnreachCodes { PortUnreach = 4, // ICMPV6_PORT_UNREACH } test_recverr_impl::( "[::1]:6801", AddressFamily::Inet6, sockopt::Ipv6RecvErr, libc::SO_EE_ORIGIN_ICMP6, IcmpV6Types::DestUnreach as u8, IcmpV6UnreachCodes::PortUnreach as u8, // Closure handles protocol-specific testing and returns generic sock_extended_err for // protocol-independent test impl. |cmsg| { if let ControlMessageOwned::Ipv6RecvErr(ext_err, err_addr) = cmsg { if let Some(origin) = err_addr { // Validate that our network error originated from localhost:0. assert_eq!( origin.sin6_family, AddressFamily::Inet6 as _ ); assert_eq!( origin.sin6_addr.s6_addr, std::net::Ipv6Addr::LOCALHOST.octets() ); assert_eq!(origin.sin6_port, 0); } else { panic!("Expected some error origin"); } *ext_err } else { panic!("Unexpected control message {cmsg:?}"); } }, ) } fn test_recverr_impl( sa: &str, af: AddressFamily, opt: OPT, ee_origin: u8, ee_type: u8, ee_code: u8, testf: TESTF, ) where OPT: SetSockOpt, TESTF: FnOnce(&ControlMessageOwned) -> libc::sock_extended_err, { use nix::errno::Errno; use std::io::IoSliceMut; const MESSAGE_CONTENTS: &str = "ABCDEF"; let std_sa = std::net::SocketAddr::from_str(sa).unwrap(); let sock_addr = SockaddrStorage::from(std_sa); let sock = socket(af, SockType::Datagram, SockFlag::SOCK_CLOEXEC, None) .unwrap(); setsockopt(&sock, opt, &true).unwrap(); if let Err(e) = sendto( sock.as_raw_fd(), MESSAGE_CONTENTS.as_bytes(), &sock_addr, MsgFlags::empty(), ) { assert_eq!(e, Errno::EADDRNOTAVAIL); println!("{af:?} not available, skipping test."); return; } let mut buf = [0u8; 8]; let mut iovec = [IoSliceMut::new(&mut buf)]; let mut cspace = cmsg_space!(libc::sock_extended_err, SA); let msg = recvmsg( sock.as_raw_fd(), &mut iovec, Some(&mut cspace), MsgFlags::MSG_ERRQUEUE, ) .unwrap(); // The sent message / destination associated with the error is returned: assert_eq!(msg.bytes, MESSAGE_CONTENTS.as_bytes().len()); // recvmsg(2): "The original destination address of the datagram that caused the error is // supplied via msg_name;" however, this is not literally true. E.g., an earlier version // of this test used 0.0.0.0 (::0) as the destination address, which was mutated into // 127.0.0.1 (::1). assert_eq!(msg.address, Some(sock_addr)); // Check for expected control message. let ext_err = match msg.cmsgs().next() { Some(cmsg) => testf(&cmsg), None => panic!("No control message"), }; assert_eq!(ext_err.ee_errno, libc::ECONNREFUSED as u32); assert_eq!(ext_err.ee_origin, ee_origin); // ip(7): ee_type and ee_code are set from the type and code fields of the ICMP (ICMPv6) // header. assert_eq!(ext_err.ee_type, ee_type); assert_eq!(ext_err.ee_code, ee_code); // ip(7): ee_info contains the discovered MTU for EMSGSIZE errors. assert_eq!(ext_err.ee_info, 0); let bytes = msg.bytes; assert_eq!(&buf[..bytes], MESSAGE_CONTENTS.as_bytes()); } } // Disable the test on emulated platforms because it fails in Cirrus-CI. Lack // of QEMU support is suspected. #[cfg_attr(qemu, ignore)] #[cfg(target_os = "linux")] #[test] pub fn test_txtime() { use nix::sys::socket::{ bind, recvmsg, sendmsg, setsockopt, socket, sockopt, ControlMessage, MsgFlags, SockFlag, SockType, SockaddrIn, }; use nix::sys::time::TimeValLike; use nix::time::{clock_gettime, ClockId}; require_kernel_version!(test_txtime, ">= 5.8"); let sock_addr = SockaddrIn::from_str("127.0.0.1:6802").unwrap(); let ssock = socket( AddressFamily::Inet, SockType::Datagram, SockFlag::empty(), None, ) .expect("send socket failed"); let txtime_cfg = libc::sock_txtime { clockid: libc::CLOCK_MONOTONIC, flags: 0, }; setsockopt(&ssock, sockopt::TxTime, &txtime_cfg).unwrap(); let rsock = socket( AddressFamily::Inet, SockType::Datagram, SockFlag::empty(), None, ) .unwrap(); bind(rsock.as_raw_fd(), &sock_addr).unwrap(); let sbuf = [0u8; 2048]; let iov1 = [std::io::IoSlice::new(&sbuf)]; let now = clock_gettime(ClockId::CLOCK_MONOTONIC).unwrap(); let delay = std::time::Duration::from_secs(1).into(); let txtime = (now + delay).num_nanoseconds() as u64; let cmsg = ControlMessage::TxTime(&txtime); sendmsg( ssock.as_raw_fd(), &iov1, &[cmsg], MsgFlags::empty(), Some(&sock_addr), ) .unwrap(); let mut rbuf = [0u8; 2048]; let mut iov2 = [std::io::IoSliceMut::new(&mut rbuf)]; recvmsg::<()>(rsock.as_raw_fd(), &mut iov2, None, MsgFlags::empty()) .unwrap(); }