feat: IP_RECVTTL/IPV6_RECVHOPLIMIT for FreeBSD/DragonFly

Author: SteveLauC

libc-test/semver/dragonfly.txt

@@ -501,6 +501,7 @@ IPV6_DONTFRAG
 IP_HDRINCL
 IP_RECVDSTADDR
 IP_RECVIF
+IP_RECVTTL
 IP_SENDSRCADDR
 IP_TOS
 ITIMER_PROF
@@ -1592,3 +1593,4 @@ xucred
 eaccess
 dirname
 basename
+IPV6_RECVHOPLIMIT

libc-test/semver/freebsd.txt

@@ -576,6 +576,7 @@ IP_RECVIF
 IP_RECVORIGDSTADDR
 IP_DONTFRAG
 IP_RECVTOS
+IP_RECVTTL
 IP_RSS_LISTEN_BUCKET
 IP_SENDSRCADDR
 IP_TOS
@@ -2251,3 +2252,4 @@ closefrom
 close_range
 eventfd_read
 eventfd_write
+IPV6_RECVHOPLIMIT

src/unix/bsd/freebsdlike/mod.rs

@@ -970,6 +970,8 @@ pub const IP_SENDSRCADDR: ::c_int = IP_RECVDSTADDR;
 pub const IP_ADD_MEMBERSHIP: ::c_int = 12;
 pub const IP_DROP_MEMBERSHIP: ::c_int = 13;
 pub const IP_RECVIF: ::c_int = 20;
+pub const IP_RECVTTL: ::c_int = 65;
+pub const IPV6_RECVHOPLIMIT: ::c_int = 37;
 pub const IPV6_JOIN_GROUP: ::c_int = 12;
 pub const IPV6_LEAVE_GROUP: ::c_int = 13;
 pub const IPV6_CHECKSUM: ::c_int = 26;