RFC 2292 struct and constant definitions

This PR adds the icmp6_filter struct and constants as defined
by RFC 2292 - Advanced Sockets API for IPv6.
These constants are available for use in get/setsockopt
on supported Unix platforms.
The operations defined on the icmp6_filter struct are defined
as C macros, so the implementations are not included here.
See the RFC for definitions and use.

Author: Skyb0rg007

libc-test/build.rs

@@ -254,6 +254,8 @@ fn test_apple(target: &str) {
         "netinet/ip.h",
         "netinet/tcp.h",
         "netinet/udp.h",
+        "netinet/icmp6.h",
+        "netinet/ip6.h",
         "netinet6/in6_var.h",
         "os/clock.h",
         "os/lock.h",
@@ -467,6 +469,8 @@ fn test_openbsd(target: &str) {
         "netinet/ip.h",
         "netinet/tcp.h",
         "netinet/udp.h",
+        "netinet/icmp6.h",
+        "netinet/ip6.h",
         "net/bpf.h",
         "regex.h",
         "resolv.h",
@@ -885,6 +889,8 @@ fn test_redox(target: &str) {
         "netinet/in.h",
         "netinet/ip.h",
         "netinet/tcp.h",
+        "netinet/icmp6.h",
+        "netinet/ip6.h",
         "poll.h",
         "pwd.h",
         "semaphore.h",
@@ -963,6 +969,8 @@ fn test_solarish(target: &str) {
         "netinet/ip.h",
         "netinet/tcp.h",
         "netinet/udp.h",
+        "netinet/icmp6.h",
+        "netinet/ip6.h",
         "poll.h",
         "port.h",
         "pthread.h",
@@ -1247,6 +1255,8 @@ fn test_netbsd(target: &str) {
         "netinet/ip.h",
         "netinet/tcp.h",
         "netinet/udp.h",
+        "netinet/icmp6.h",
+        "netinet/ip6.h",
         "poll.h",
         "pthread.h",
         "pwd.h",
@@ -1538,6 +1548,8 @@ fn test_dragonflybsd(target: &str) {
         "netinet/ip.h",
         "netinet/tcp.h",
         "netinet/udp.h",
+        "netinet/icmp6.h",
+        "netinet/ip6.h",
         "poll.h",
         "pthread.h",
         "pthread_np.h",
@@ -1853,6 +1865,8 @@ fn test_android(target: &str) {
         "netinet/ip.h",
         "netinet/tcp.h",
         "netinet/udp.h",
+        "netinet/icmp6.h",
+        "netinet/ip6.h",
         "netpacket/packet.h",
         "poll.h",
         "pthread.h",
@@ -2372,6 +2386,8 @@ fn test_freebsd(target: &str) {
         "netinet/sctp.h",
         "netinet/tcp.h",
         "netinet/udp.h",
+        "netinet/icmp6.h",
+        "netinet/ip6.h",
         "poll.h",
         "pthread.h",
         "pthread_np.h",
@@ -3002,6 +3018,8 @@ fn test_emscripten(target: &str) {
         "netinet/ip.h",
         "netinet/tcp.h",
         "netinet/udp.h",
+        "netinet/icmp6.h",
+        "netinet/ip6.h",
         "netpacket/packet.h",
         "poll.h",
         "pthread.h",
@@ -3270,6 +3288,8 @@ fn test_neutrino(target: &str) {
         "netinet/tcp.h",
         "netinet/udp.h",
         "netinet/ip_var.h",
+        "netinet/icmp6.h",
+        "netinet/ip6.h",
         "sys/poll.h",
         "pthread.h",
         "pwd.h",
@@ -3774,8 +3794,10 @@ fn test_linux(target: &str) {
         "netdb.h",
         "netinet/in.h",
         "netinet/ip.h",
+        "netinet/ip6.h",
         "netinet/tcp.h",
         "netinet/udp.h",
+        "netinet/icmp6.h",
         (l4re, "netpacket/packet.h"),
         "poll.h",
         "pthread.h",
@@ -5065,6 +5087,7 @@ fn test_haiku(target: &str) {
         "netinet/ip_var.h",
         "netinet/tcp.h",
         "netinet/udp.h",
+        "netinet/icmp6.h",
         "netinet6/in6.h",
         "nl_types.h",
         "null.h",

src/unix/bsd/mod.rs

@@ -211,6 +211,7 @@ pub const IPV6_UNICAST_HOPS: c_int = 4;
 pub const IPV6_MULTICAST_IF: c_int = 9;
 pub const IPV6_MULTICAST_HOPS: c_int = 10;
 pub const IPV6_MULTICAST_LOOP: c_int = 11;
+pub const ICMP6_FILTER: c_int = 18;
 pub const IPV6_V6ONLY: c_int = 27;
 pub const IPV6_DONTFRAG: c_int = 62;
 

src/unix/linux_like/mod.rs

@@ -977,6 +977,8 @@ pub const IPV6_PMTUDISC_PROBE: c_int = 3;
 pub const IPV6_PMTUDISC_INTERFACE: c_int = 4;
 pub const IPV6_PMTUDISC_OMIT: c_int = 5;
 
+pub const ICMP6_FILTER: c_int = 1;
+
 pub const TCP_NODELAY: c_int = 1;
 pub const TCP_MAXSEG: c_int = 2;
 pub const TCP_CORK: c_int = 3;