solarish: Add IP TTL and IPv6 Hop Limit consts

Adds:
- IPV6_HOPLIMIT (illumos + solaris)
- IPV6_MINHOPCOUNT (illumos)
- IP_MINTTL (illumos)

Signed-off-by: Trey Aspelund <trey@oxidecomputer.com>

Author: taspelund

libc-test/semver/illumos.txt

@@ -3,6 +3,8 @@ F_DUP2FD_CLOEXEC
 F_DUP2FD_CLOFORK
 F_DUP3FD
 F_DUPFD_CLOFORK
+IPV6_MINHOPCOUNT
+IP_MINTTL
 MSG_CMSG_CLOEXEC
 MSG_CMSG_CLOFORK
 O_CLOFORK

libc-test/semver/solarish.txt

@@ -3,6 +3,7 @@ AIO_CANCELED
 AIO_NOTCANCELED
 IPV6_BOUND_IF
 IPV6_DONTFRAG
+IPV6_HOPLIMIT
 IPV6_PKTINFO
 IPV6_RECVTCLASS
 IPV6_TCLASS

src/unix/solarish/illumos.rs

@@ -207,6 +207,10 @@ pub const B4000000: crate::speed_t = 31;
 // sys/systeminfo.h
 pub const SI_ADDRESS_WIDTH: c_int = 520;
 
+// netinet/in.h
+pub const IP_MINTTL: c_int = 0x1c;
+pub const IPV6_MINHOPCOUNT: c_int = 0x2f;
+
 // sys/timerfd.h
 pub const TFD_CLOEXEC: i32 = 0o2000000;
 pub const TFD_NONBLOCK: i32 = 0o4000;

src/unix/solarish/mod.rs

@@ -882,6 +882,7 @@ pub const IPV6_MULTICAST_IF: c_int = 0x6;
 pub const IPV6_MULTICAST_HOPS: c_int = 0x7;
 pub const IPV6_MULTICAST_LOOP: c_int = 0x8;
 pub const IPV6_PKTINFO: c_int = 0xb;
+pub const IPV6_HOPLIMIT: c_int = 0xc;
 pub const IPV6_RECVPKTINFO: c_int = 0x12;
 pub const IPV6_RECVTCLASS: c_int = 0x19;
 pub const IPV6_DONTFRAG: c_int = 0x21;