Add IPC support (#6348)

This is useful for both security and performance reasons. IPC is faster
than TCP, and it is subject to OS access controls.

substrate/Cargo.lock

@@ -2383,6 +2383,20 @@ dependencies = [
  "unicase",
 ]
 
+[[package]]
+name = "jsonrpc-ipc-server"
+version = "14.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dedccd693325d833963b549e959137f30a7a0ea650cde92feda81dc0c1393cb5"
+dependencies = [
+ "jsonrpc-core",
+ "jsonrpc-server-utils",
+ "log",
+ "parity-tokio-ipc",
+ "parking_lot 0.10.2",
+ "tokio-service",
+]
+
 [[package]]
 name = "jsonrpc-pubsub"
 version = "14.2.0"
@@ -3092,7 +3106,7 @@ dependencies = [
  "kernel32-sys",
  "libc",
  "log",
- "miow",
+ "miow 0.2.1",
  "net2",
  "slab",
  "winapi 0.2.8",
@@ -3110,6 +3124,18 @@ dependencies = [
  "slab",
 ]
 
+[[package]]
+name = "mio-named-pipes"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f5e374eff525ce1c5b7687c4cef63943e7686524a387933ad27ca7ec43779cb3"
+dependencies = [
+ "log",
+ "mio",
+ "miow 0.3.5",
+ "winapi 0.3.8",
+]
+
 [[package]]
 name = "mio-uds"
 version = "0.6.7"
@@ -3133,6 +3159,16 @@ dependencies = [
  "ws2_32-sys",
 ]
 
+[[package]]
+name = "miow"
+version = "0.3.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "07b88fb9795d4d36d62a012dfbf49a8f5cf12751f36d31a9dbe66d528e58979e"
+dependencies = [
+ "socket2",
+ "winapi 0.3.8",
+]
+
 [[package]]
 name = "more-asserts"
 version = "0.2.1"
@@ -4734,6 +4770,25 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "aa9777aa91b8ad9dd5aaa04a9b6bcb02c7f1deb952fca5a66034d5e63afc5c6f"
 
+[[package]]
+name = "parity-tokio-ipc"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1e57fea504fea33f9fbb5f49f378359030e7e026a6ab849bb9e8f0787376f1bf"
+dependencies = [
+ "bytes 0.4.12",
+ "futures 0.1.29",
+ "libc",
+ "log",
+ "mio-named-pipes",
+ "miow 0.3.5",
+ "rand 0.7.3",
+ "tokio 0.1.22",
+ "tokio-named-pipes",
+ "tokio-uds",
+ "winapi 0.3.8",
+]
+
 [[package]]
 name = "parity-util-mem"
 version = "0.6.1"
@@ -6580,6 +6635,7 @@ version = "2.0.0-rc3"
 dependencies = [
  "jsonrpc-core",
  "jsonrpc-http-server",
+ "jsonrpc-ipc-server",
  "jsonrpc-pubsub",
  "jsonrpc-ws-server",
  "log",
@@ -8655,6 +8711,19 @@ dependencies = [
  "syn 1.0.17",
 ]
 
+[[package]]
+name = "tokio-named-pipes"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9d282d483052288b2308ba5ee795f5673b159c9bdf63c385a05609da782a5eae"
+dependencies = [
+ "bytes 0.4.12",
+ "futures 0.1.29",
+ "mio",
+ "mio-named-pipes",
+ "tokio 0.1.22",
+]
+
 [[package]]
 name = "tokio-reactor"
 version = "0.1.12"
@@ -8686,6 +8755,15 @@ dependencies = [
  "webpki",
 ]
 
+[[package]]
+name = "tokio-service"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "24da22d077e0f15f55162bdbdc661228c1581892f52074fb242678d015b45162"
+dependencies = [
+ "futures 0.1.29",
+]
+
 [[package]]
 name = "tokio-sync"
 version = "0.1.8"