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 +254,7 @@ fn test_apple(target: &str) {
         "netinet/ip.h",
         "netinet/tcp.h",
         "netinet/udp.h",
+        "netinet/icmp6.h",
         "netinet6/in6_var.h",
         "os/clock.h",
         "os/lock.h",
@@ -449,6 +450,7 @@ fn test_openbsd(target: &str) {
         "netinet/ip.h",
         "netinet/tcp.h",
         "netinet/udp.h",
+        "netinet/icmp6.h",
         "net/bpf.h",
         "regex.h",
         "resolv.h",
@@ -867,6 +869,7 @@ fn test_redox(target: &str) {
         "netinet/in.h",
         "netinet/ip.h",
         "netinet/tcp.h",
+        "netinet/icmp6.h",
         "poll.h",
         "pwd.h",
         "semaphore.h",
@@ -945,6 +948,7 @@ fn test_solarish(target: &str) {
         "netinet/ip.h",
         "netinet/tcp.h",
         "netinet/udp.h",
+        "netinet/icmp6.h",
         "poll.h",
         "port.h",
         "pthread.h",
@@ -1229,6 +1233,7 @@ fn test_netbsd(target: &str) {
         "netinet/ip.h",
         "netinet/tcp.h",
         "netinet/udp.h",
+        "netinet/icmp6.h",
         "poll.h",
         "pthread.h",
         "pwd.h",
@@ -1518,6 +1523,7 @@ fn test_dragonflybsd(target: &str) {
         "netinet/ip.h",
         "netinet/tcp.h",
         "netinet/udp.h",
+        "netinet/icmp6.h",
         "poll.h",
         "pthread.h",
         "pthread_np.h",
@@ -1833,6 +1839,7 @@ fn test_android(target: &str) {
         "netinet/ip.h",
         "netinet/tcp.h",
         "netinet/udp.h",
+        "netinet/icmp6.h",
         "netpacket/packet.h",
         "poll.h",
         "pthread.h",
@@ -2373,6 +2380,7 @@ fn test_freebsd(target: &str) {
         "netinet/sctp.h",
         "netinet/tcp.h",
         "netinet/udp.h",
+        "netinet/icmp6.h",
         "poll.h",
         "pthread.h",
         "pthread_np.h",
@@ -3000,6 +3008,7 @@ fn test_emscripten(target: &str) {
         "netinet/ip.h",
         "netinet/tcp.h",
         "netinet/udp.h",
+        "netinet/icmp6.h",
         "netpacket/packet.h",
         "poll.h",
         "pthread.h",
@@ -3268,6 +3277,7 @@ fn test_neutrino(target: &str) {
         "netinet/tcp.h",
         "netinet/udp.h",
         "netinet/ip_var.h",
+        "netinet/icmp6.h",
         "sys/poll.h",
         "pthread.h",
         "pwd.h",
@@ -3764,6 +3774,7 @@ fn test_linux(target: &str) {
         "netinet/ip.h",
         "netinet/tcp.h",
         "netinet/udp.h",
+        "netinet/icmp6.h",
         (l4re, "netpacket/packet.h"),
         "poll.h",
         "pthread.h",
@@ -5022,6 +5033,7 @@ 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/mod.rs

@@ -217,6 +217,10 @@ s! {
     pub struct in6_addr {
         pub s6_addr: [u8; 16],
     }
+
+    pub struct icmp6_filter {
+        pub icmp6_filt: [u32; 8],
+    }
 }
 
 s_no_extra_traits! {
@@ -364,6 +368,48 @@ pub const ATF_PERM: c_int = 0x04;
 pub const ATF_PUBL: c_int = 0x08;
 pub const ATF_USETRAILERS: c_int = 0x10;
 
+pub const ICMP6_FILTER: c_int = 1;
+
+// ICMPv6 Type and Code Values
+pub const ICMP6_DST_UNREACH: u8 = 1;
+pub const ICMP6_PACKET_TOO_BIG: u8 = 2;
+pub const ICMP6_TIME_EXCEEDED: u8 = 3;
+pub const ICMP6_PARAM_PROB: u8 = 4;
+
+pub const ICMP6_INFOMSG_MASK: u8 = 0x80;
+
+pub const ICMP6_ECHO_REQUEST: u8 = 128;
+pub const ICMP6_ECHO_REPLY: u8 = 129;
+pub const MLD_LISTENER_QUERY: u8 = 130;
+pub const MLD_LISTENER_REPORT: u8 = 131;
+pub const MLD_LISTENER_REDUCTION: u8 = 132;
+
+pub const ICMP6_DST_UNREACH_NOROUTE: u8 = 0;
+pub const ICMP6_DST_UNREACH_ADMIN: u8 = 1;
+pub const ICMP6_DST_UNREACH_BEYONDSCOPE: u8 = 2;
+pub const ICMP6_DST_UNREACH_ADDR: u8 = 3;
+pub const ICMP6_DST_UNREACH_NOPORT: u8 = 4;
+
+pub const ICMP6_TIME_EXCEED_TRANSIT: u8 = 0;
+pub const ICMP6_TIME_EXCEED_REASSEMBLY: u8 = 1;
+
+pub const ICMP6_PARAMPROB_HEADER: u8 = 0;
+pub const ICMP6_PARAMPROB_NEXTHEADER: u8 = 1;
+pub const ICMP6_PARAMPROB_OPTION: u8 = 2;
+
+// ICMPv6 Neighbor Discovery Type and Code Values
+pub const ND_ROUTER_SOLICIT: u8 = 133;
+pub const ND_ROUTER_ADVERT: u8 = 134;
+pub const ND_NEIGHBOR_SOLICIT: u8 = 135;
+pub const ND_NEIGHBOR_ADVERT: u8 = 136;
+pub const ND_REDIRECT: u8 = 137;
+
+pub const ND_OPT_SOURCE_LINKADDR: u8 = 1;
+pub const ND_OPT_TARGET_LINKADDR: u8 = 2;
+pub const ND_OPT_PREFIX_INFORMATION: u8 = 3;
+pub const ND_OPT_REDIRECTED_HEADER: u8 = 4;
+pub const ND_OPT_MTU: u8 = 5;
+
 cfg_if! {
     if #[cfg(any(target_os = "nto", target_os = "aix"))] {
         pub const FNM_PERIOD: c_int = 1 << 1;