Add IPV6_PKTINFO, Correct documentationn for IPV6_RECVPKTINFO (#2113)

* Add IPV6_PKTINFO, Correct documentationn for IPV6_RECVPKTINFO

* Update src/sys/socket/sockopt.rs

Co-authored-by: SteveLauC <[email protected]>

* Update src/sys/socket/sockopt.rs

Co-authored-by: SteveLauC <[email protected]>

* revert documentation changes for IPV6_RECVPKTINFO

* updated changelog

---------

Co-authored-by: SteveLauC <[email protected]>

Author: ishanjain28

changelog/2113.added.md

@@ -0,0 +1 @@
+Add socket option `IPV6_PKTINFO` for BSDs/Linux/Android, also `IPV6_RECVPKTINFO` for DragonFlyBSD

src/sys/socket/sockopt.rs

@@ -905,7 +905,7 @@ sockopt_impl!(
     libc::IP_PKTINFO,
     bool
 );
-#[cfg(any(linux_android, target_os = "freebsd", apple_targets, netbsdlike))]
+#[cfg(any(linux_android, bsd))]
 #[cfg(feature = "net")]
 sockopt_impl!(
     #[cfg_attr(docsrs, doc(cfg(feature = "net")))]
@@ -917,6 +917,19 @@ sockopt_impl!(
     libc::IPV6_RECVPKTINFO,
     bool
 );
+
+#[cfg(any(linux_android, bsd))]
+#[cfg(feature = "net")]
+sockopt_impl!(
+    #[cfg_attr(docsrs, doc(cfg(feature = "net")))]
+    /// Pass an `IPV6_PKTINFO` ancillary message that contains a in6_pktinfo
+    /// structure that supplies some information about the incoming packet.
+    Ipv6PacketInfo,
+    Both,
+    libc::IPPROTO_IPV6,
+    libc::IPV6_PKTINFO,
+    bool
+);
 #[cfg(bsd)]
 #[cfg(feature = "net")]
 sockopt_impl!(