Change clock granularity(G) to kcp->interval

pick from skywind3000/kcp@34d75bc

.gitignore

@@ -1,7 +1,3 @@
-# Generated by Cargo
-# will have compiled files and executables
 /target/
-
-# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
-# More information here http:https://doc.crates.io/guide.html#cargotoml-vs-cargolock
+**/*.rs.bk
 Cargo.lock

Cargo.toml

@@ -6,11 +6,11 @@ authors = ["Yuanchao Sun <[email protected]>"]
 [dependencies]
 byteorder = "1"
 bytes = "0.4"
-env_logger = { version = "0.3", default-features = false }
+env_logger = { version = "0.4", default-features = false }
 futures = "0.1"
 iovec = "0.1.0"
 mio = "0.6"
 rand = "0.3"
 time = "0.1"
-tokio-core = "^0.1.9"
+tokio-core = "0.1.9"
 tokio-io = "0.1"

src/kcp.rs

@@ -307,7 +307,7 @@ impl<W: Write> KCP<W> {
  self.rx_srtt = 1;
  }
  }
- let rto = self.rx_srtt + cmp::max(1, 4 * self.rx_rttval);
+ let rto = self.rx_srtt + cmp::max(self.interval, 4 * self.rx_rttval);
  self.rx_rto = bound(self.rx_minrto, rto, KCP_RTO_MAX);
  }