Add support for QNX Neutrino

Backport of commit 5b68514.

Author: flba-eb

Diff for: Cargo.toml

@@ -33,7 +33,7 @@ rustdoc-args = ["--cfg", "docsrs"]
 features = ["all"]
 
 [target."cfg(unix)".dependencies]
-libc = "0.2.124"
+libc = "0.2.139"
 
 [target."cfg(windows)".dependencies]
 winapi = { version = "0.3.9", features = ["handleapi", "ws2ipdef", "ws2tcpip"] }

Diff for: src/lib.rs

@@ -329,13 +329,19 @@ impl<'a> DerefMut for MaybeUninitSlice<'a> {
 pub struct TcpKeepalive {
     #[cfg_attr(target_os = "openbsd", allow(dead_code))]
     time: Option<Duration>,
-    #[cfg(not(any(target_os = "openbsd", target_os = "redox", target_os = "solaris")))]
+    #[cfg(not(any(
+        target_os = "openbsd",
+        target_os = "redox",
+        target_os = "solaris",
+        target_os = "nto",
+    )))]
     interval: Option<Duration>,
     #[cfg(not(any(
         target_os = "openbsd",
         target_os = "redox",
         target_os = "solaris",
-        target_os = "windows"
+        target_os = "windows",
+        target_os = "nto",
     )))]
     retries: Option<u32>,
 }
@@ -345,13 +351,19 @@ impl TcpKeepalive {
     pub const fn new() -> TcpKeepalive {
         TcpKeepalive {
             time: None,
-            #[cfg(not(any(target_os = "openbsd", target_os = "redox", target_os = "solaris")))]
+            #[cfg(not(any(
+                target_os = "openbsd",
+                target_os = "redox",
+                target_os = "solaris",
+                target_os = "nto",
+            )))]
             interval: None,
             #[cfg(not(any(
                 target_os = "openbsd",
                 target_os = "redox",
                 target_os = "solaris",
-                target_os = "windows"
+                target_os = "windows",
+                target_os = "nto",
             )))]
             retries: None,
         }

Diff for: src/sockaddr.rs

@@ -302,6 +302,7 @@ impl fmt::Debug for SockAddr {
             target_os = "netbsd",
             target_os = "openbsd",
             target_os = "vxworks",
+            target_os = "nto",
         ))]
         f.field("ss_len", &self.storage.ss_len);
         f.field("ss_family", &self.storage.ss_family)

Diff for: src/socket.rs

@@ -11,7 +11,9 @@ use std::io::{self, Read, Write};
 #[cfg(not(target_os = "redox"))]
 use std::io::{IoSlice, IoSliceMut};
 use std::mem::MaybeUninit;
-use std::net::{self, Ipv4Addr, Ipv6Addr, Shutdown};
+#[cfg(not(target_os = "nto"))]
+use std::net::Ipv6Addr;
+use std::net::{self, Ipv4Addr, Shutdown};
 #[cfg(unix)]
 use std::os::unix::io::{FromRawFd, IntoRawFd};
 #[cfg(windows)]
@@ -1138,6 +1140,7 @@ impl Socket {
         target_os = "openbsd",
         target_os = "redox",
         target_os = "solaris",
+        target_os = "nto",
     )))]
     pub fn join_multicast_v4_n(
         &self,
@@ -1167,6 +1170,7 @@ impl Socket {
         target_os = "openbsd",
         target_os = "redox",
         target_os = "solaris",
+        target_os = "nto",
     )))]
     pub fn leave_multicast_v4_n(
         &self,
@@ -1198,6 +1202,7 @@ impl Socket {
         target_os = "openbsd",
         target_os = "redox",
         target_os = "fuchsia",
+        target_os = "nto",
     )))]
     pub fn join_ssm_v4(
         &self,
@@ -1232,6 +1237,7 @@ impl Socket {
         target_os = "openbsd",
         target_os = "redox",
         target_os = "fuchsia",
+        target_os = "nto",
     )))]
     pub fn leave_ssm_v4(
         &self,
@@ -1407,6 +1413,7 @@ impl Socket {
         target_os = "redox",
         target_os = "solaris",
         target_os = "windows",
+        target_os = "nto",
     )))]
     pub fn set_recv_tos(&self, recv_tos: bool) -> io::Result<()> {
         let recv_tos = if recv_tos { 1 } else { 0 };
@@ -1435,6 +1442,7 @@ impl Socket {
         target_os = "redox",
         target_os = "solaris",
         target_os = "windows",
+        target_os = "nto",
     )))]
     pub fn recv_tos(&self) -> io::Result<bool> {
         unsafe {
@@ -1457,6 +1465,7 @@ impl Socket {
     /// This function specifies a new multicast group for this socket to join.
     /// The address must be a valid multicast address, and `interface` is the
     /// index of the interface to join/leave (or 0 to indicate any interface).
+    #[cfg(not(target_os = "nto"))]
     pub fn join_multicast_v6(&self, multiaddr: &Ipv6Addr, interface: u32) -> io::Result<()> {
         let mreq = sys::Ipv6Mreq {
             ipv6mr_multiaddr: sys::to_in6_addr(multiaddr),
@@ -1480,6 +1489,7 @@ impl Socket {
     /// For more information about this option, see [`join_multicast_v6`].
     ///
     /// [`join_multicast_v6`]: Socket::join_multicast_v6
+    #[cfg(not(target_os = "nto"))]
     pub fn leave_multicast_v6(&self, multiaddr: &Ipv6Addr, interface: u32) -> io::Result<()> {
         let mreq = sys::Ipv6Mreq {
             ipv6mr_multiaddr: sys::to_in6_addr(multiaddr),

Diff for: src/sys/unix.rs

@@ -75,6 +75,8 @@ pub(crate) use libc::{
 #[cfg(not(target_os = "redox"))]
 pub(crate) use libc::{MSG_TRUNC, SO_OOBINLINE};
 // Used in `Socket`.
+#[cfg(not(target_os = "nto"))]
+pub(crate) use libc::ipv6_mreq as Ipv6Mreq;
 #[cfg(all(feature = "all", not(target_os = "redox")))]
 pub(crate) use libc::IP_HDRINCL;
 #[cfg(not(any(
@@ -85,6 +87,8 @@ pub(crate) use libc::IP_HDRINCL;
     target_os = "openbsd",
     target_os = "redox",
     target_os = "solaris",
+    target_os = "haiku",
+    target_os = "nto",
 )))]
 pub(crate) use libc::IP_RECVTOS;
 #[cfg(not(any(
@@ -99,11 +103,11 @@ pub(crate) use libc::SO_LINGER;
 #[cfg(target_vendor = "apple")]
 pub(crate) use libc::SO_LINGER_SEC as SO_LINGER;
 pub(crate) use libc::{
-    ip_mreq as IpMreq, ipv6_mreq as Ipv6Mreq, linger, IPPROTO_IP, IPPROTO_IPV6,
-    IPV6_MULTICAST_HOPS, IPV6_MULTICAST_IF, IPV6_MULTICAST_LOOP, IPV6_UNICAST_HOPS, IPV6_V6ONLY,
-    IP_ADD_MEMBERSHIP, IP_DROP_MEMBERSHIP, IP_MULTICAST_IF, IP_MULTICAST_LOOP, IP_MULTICAST_TTL,
-    IP_TTL, MSG_OOB, MSG_PEEK, SOL_SOCKET, SO_BROADCAST, SO_ERROR, SO_KEEPALIVE, SO_RCVBUF,
-    SO_RCVTIMEO, SO_REUSEADDR, SO_SNDBUF, SO_SNDTIMEO, SO_TYPE, TCP_NODELAY,
+    ip_mreq as IpMreq, linger, IPPROTO_IP, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, IPV6_MULTICAST_IF,
+    IPV6_MULTICAST_LOOP, IPV6_UNICAST_HOPS, IPV6_V6ONLY, IP_ADD_MEMBERSHIP, IP_DROP_MEMBERSHIP,
+    IP_MULTICAST_IF, IP_MULTICAST_LOOP, IP_MULTICAST_TTL, IP_TTL, MSG_OOB, MSG_PEEK, SOL_SOCKET,
+    SO_BROADCAST, SO_ERROR, SO_KEEPALIVE, SO_RCVBUF, SO_RCVTIMEO, SO_REUSEADDR, SO_SNDBUF,
+    SO_SNDTIMEO, SO_TYPE, TCP_NODELAY,
 };
 #[cfg(not(any(
     target_os = "dragonfly",
@@ -112,6 +116,7 @@ pub(crate) use libc::{
     target_os = "openbsd",
     target_os = "redox",
     target_os = "fuchsia",
+    target_os = "nto",
 )))]
 pub(crate) use libc::{
     ip_mreq_source as IpMreqSource, IP_ADD_SOURCE_MEMBERSHIP, IP_DROP_SOURCE_MEMBERSHIP,
@@ -124,6 +129,7 @@ pub(crate) use libc::{
     target_os = "netbsd",
     target_os = "openbsd",
     target_os = "solaris",
+    target_os = "nto",
     target_vendor = "apple"
 )))]
 pub(crate) use libc::{IPV6_ADD_MEMBERSHIP, IPV6_DROP_MEMBERSHIP};
@@ -158,9 +164,14 @@ pub(crate) use libc::{TCP_KEEPCNT, TCP_KEEPINTVL};
 // See this type in the Windows file.
 pub(crate) type Bool = c_int;
 
-#[cfg(target_vendor = "apple")]
+#[cfg(any(target_vendor = "apple", target_os = "nto"))]
 use libc::TCP_KEEPALIVE as KEEPALIVE_TIME;
-#[cfg(not(any(target_vendor = "apple", target_os = "haiku", target_os = "openbsd")))]
+#[cfg(not(any(
+    target_vendor = "apple",
+    target_os = "haiku",
+    target_os = "openbsd",
+    target_os = "nto",
+)))]
 use libc::TCP_KEEPIDLE as KEEPALIVE_TIME;
 
 /// Helper macro to execute a system call that returns an `io::Result`.
@@ -219,6 +230,7 @@ type IovLen = usize;
     target_os = "netbsd",
     target_os = "openbsd",
     target_os = "solaris",
+    target_os = "nto",
     target_vendor = "apple",
 ))]
 type IovLen = c_int;
@@ -903,7 +915,7 @@ pub(crate) fn keepalive_time(fd: Socket) -> io::Result<Duration> {
 
 #[allow(unused_variables)]
 pub(crate) fn set_tcp_keepalive(fd: Socket, keepalive: &TcpKeepalive) -> io::Result<()> {
-    #[cfg(not(any(target_os = "haiku", target_os = "openbsd")))]
+    #[cfg(not(any(target_os = "haiku", target_os = "openbsd", target_os = "nto")))]
     if let Some(time) = keepalive.time {
         let secs = into_secs(time);
         unsafe { setsockopt(fd, libc::IPPROTO_TCP, KEEPALIVE_TIME, secs)? }
@@ -930,10 +942,16 @@ pub(crate) fn set_tcp_keepalive(fd: Socket, keepalive: &TcpKeepalive) -> io::Res
         }
     }
 
+    #[cfg(target_os = "nto")]
+    if let Some(time) = keepalive.time {
+        let secs = into_timeval(Some(time));
+        unsafe { setsockopt(fd, libc::IPPROTO_TCP, KEEPALIVE_TIME, secs)? }
+    }
+
     Ok(())
 }
 
-#[cfg(not(any(target_os = "haiku", target_os = "openbsd")))]
+#[cfg(not(any(target_os = "haiku", target_os = "openbsd", target_os = "nto")))]
 fn into_secs(duration: Duration) -> c_int {
     min(duration.as_secs(), c_int::max_value() as u64) as c_int
 }
@@ -1028,6 +1046,7 @@ pub(crate) fn from_in6_addr(addr: in6_addr) -> Ipv6Addr {
     target_os = "openbsd",
     target_os = "redox",
     target_os = "solaris",
+    target_os = "nto",
 )))]
 pub(crate) fn to_mreqn(
     multiaddr: &Ipv4Addr,