Can't get an echo response for IPv6.

[kkazuo]

Thank you for making such a great crate.
I am wondering because I just can't get an echo response for IPv6.

And I made this little patch.
Can I hear your thoughts?

Thanks.

---

patch diff.

diff --git a/src/client.rs b/src/client.rs
index 41bf474..30cc1c8 100644
--- a/src/client.rs
+++ b/src/client.rs
@@ -179,8 +179,7 @@ fn gen_uuid_with_payload(addr: IpAddr, datas: &[u8]) -> Option<Uuid> {
             }
         }
         IpAddr::V6(_) => {
-            if let Some(ipv6_packet) = ipv6::Ipv6Packet::new(datas) {
-                if let Some(icmpv6_packet) = icmpv6::Icmpv6Packet::new(ipv6_packet.payload()) {
+                if let Some(icmpv6_packet) = icmpv6::Icmpv6Packet::new(datas) {
                     let payload = icmpv6_packet.payload();

                     if payload.len() < 20 {
@@ -190,7 +189,6 @@ fn gen_uuid_with_payload(addr: IpAddr, datas: &[u8]) -> Option<Uuid> {
                     let uuid = &payload[4..20];
                     return Uuid::from_slice(uuid).ok();
                 }
-            }
         }
     }
     None

Results without patch. ipv6 something went wrong.

% sudo ./target/debug/examples/simple --host 127.0.0.1
V4(Icmpv4Packet { source: 127.0.0.1, destination: 127.0.0.1, ttl: 64, icmp_type: IcmpType(0), icmp_code: IcmpCode(0), size: 64, real_dest: 127.0.0.1, identifier: 111, sequence: 0 }) 90.90µs
% sudo ./target/debug/examples/simple --host ::1
Request timeout for icmp_seq 0

Results with patch. it looks good.

% sudo ./target/debug/examples/simple --host 127.0.0.1
V4(Icmpv4Packet { source: 127.0.0.1, destination: 127.0.0.1, ttl: 64, icmp_type: IcmpType(0), icmp_code: IcmpCode(0), size: 64, real_dest: 127.0.0.1, identifier: 111, sequence: 0 }) 55.15µs
% sudo ./target/debug/examples/simple --host ::1
V6(Icmpv6Packet { source: ::1, destination: ::1, max_hop_limit: 0, icmpv6_type: Icmpv6Type(129), icmpv6_code: Icmpv6Code(0), size: 64, real_dest: ::1, identifier: 111, sequence: 0 }) 161.13µs

[kolapapa]

Thanks a lot for helping to find this problem~ 😊

My network support for IPv6 is not good enough, it has been unable to test.
Today, I have incorporated it into the code.