IPv6 Support

grammers-mtsender/src/sender_pool.rs

@@ -291,22 +291,30 @@ impl SenderPoolRunner {
     ) -> Result<Sender<transport::Full, mtp::Encrypted>, InvocationError> {
         let transport = transport::Full::new;
 
+        let address = match std::env::var("PREFER_V6") {
+            Ok(val) if val == "1" || val.eq_ignore_ascii_case("true") => {
+                log::info!("Using IPv6 connection");
+                dc_option.ipv6.into()
+            }
+            _ => dc_option.ipv4.into()
+        };
+
         #[cfg(feature = "proxy")]
         let addr = || {
             if let Some(proxy) = self.connection_params.proxy_url.clone() {
                 ServerAddr::Proxied {
-                    address: dc_option.ipv4.into(),
+                    address,
                     proxy,
                 }
             } else {
                 ServerAddr::Tcp {
-                    address: dc_option.ipv4.into(),
+                    address,
                 }
             }
         };
         #[cfg(not(feature = "proxy"))]
         let addr = || ServerAddr::Tcp {
-            address: dc_option.ipv4.into(),
+            address,
         };
 
         let init_connection = tl::functions::InvokeWithLayer {

grammers-session/src/dc_options.rs

@@ -6,7 +6,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use std::net::{Ipv4Addr, SocketAddrV4, SocketAddrV6};
+use std::net::{Ipv4Addr, Ipv6Addr, SocketAddrV4, SocketAddrV6};
 
 use crate::types::DcOption;
 
@@ -16,40 +16,40 @@ const fn ipv4(a: u8, b: u8, c: u8, d: u8) -> SocketAddrV4 {
     SocketAddrV4::new(Ipv4Addr::new(a, b, c, d), 443)
 }
 
-const fn ipv6(a: u8, b: u8, c: u8, d: u8) -> SocketAddrV6 {
-    SocketAddrV6::new(ipv4(a, b, c, d).ip().to_ipv6_compatible(), 443, 0, 0)
+const fn ipv6(a: u16, b: u16, c: u16, d: u16, e: u16, f: u16, g: u16, h: u16) -> SocketAddrV6 {
+    SocketAddrV6::new(Ipv6Addr::new(a, b, c, d, e, f, g, h), 443, 0, 0)
 }
 
 /// Hardcoded known `static` options from `functions::help::GetConfig`.
 pub(crate) const KNOWN_DC_OPTIONS: [DcOption; 5] = [
     DcOption {
         id: 1,
         ipv4: ipv4(149, 154, 175, 53),
-        ipv6: ipv6(149, 154, 175, 53),
+        ipv6: ipv6(0x2001, 0xb28, 0xf23d, 0xf001, 0, 0, 0, 0xa),
         auth_key: None,
     },
     DcOption {
         id: 2,
         ipv4: ipv4(149, 154, 167, 41),
-        ipv6: ipv6(149, 154, 167, 41),
+        ipv6: ipv6(0x2001, 0x67c, 0x4e8, 0xf002, 0, 0, 0, 0xa),
         auth_key: None,
     },
     DcOption {
         id: 3,
         ipv4: ipv4(149, 154, 175, 100),
-        ipv6: ipv6(149, 154, 175, 100),
+        ipv6: ipv6(0x2001, 0xb28, 0xf23d, 0xf003, 0, 0, 0, 0xa),
         auth_key: None,
     },
     DcOption {
         id: 4,
         ipv4: ipv4(149, 154, 167, 92),
-        ipv6: ipv6(149, 154, 167, 92),
+        ipv6: ipv6(0x2001, 0x67c, 0x4e8, 0xf004, 0, 0, 0, 0xa),
         auth_key: None,
     },
     DcOption {
         id: 5,
         ipv4: ipv4(91, 108, 56, 104),
-        ipv6: ipv6(91, 108, 56, 104),
+        ipv6: ipv6(0x2001, 0xb28, 0xf23f, 0xf005, 0, 0, 0, 0xa),
         auth_key: None,
     },
 ];