Add bitswap protobufs.

Cargo.lock

@@ -562,6 +562,7 @@ dependencies = [
  "multibase 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "multihash 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "parity-multihash 0.1.0",
+ "protobuf 2.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio 0.1.15 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 

Cargo.toml

@@ -11,4 +11,5 @@ libp2p = { version = "*", path = "../rust-libp2p" }
 multibase = "*"
 multihash = "*"
 parity-multihash = { version = "*", path = "../rust-libp2p/misc/multihash" }
+protobuf = "2.0.2"
 tokio = "*"

src/bitswap/bitswap.proto

@@ -0,0 +1,29 @@
+syntax = "proto3";
+
+message Message {
+  message Wantlist {
+    message Entry {
+      // the block cid (cidV0 in bitswap 1.0.0, cidV1 in bitswap 1.1.0)
+			bytes block = 1;
+      // the priority (normalized). default to 1
+			int32 priority = 2;
+      // whether this revokes an entry
+			bool cancel = 3;
+		}
+
+    // a list of wantlist entries
+    repeated Entry entries = 1;
+    // whether this is the full wantlist. default to false
+    bool full = 2;
+  }
+
+  message Block {
+    // CID prefix (cid version, multicodec and multihash prefix (type + length)
+    bytes prefix = 1;
+    bytes data = 2;
+  }
+
+  Wantlist wantlist = 1;
+  repeated bytes blocks = 2;		// used to send Blocks in bitswap 1.0.0
+  repeated Block payload = 3;		// used to send Blocks in bitswap 1.1.0
+}

src/bitswap/mod.rs

@@ -6,6 +6,8 @@ use parity_multihash::Multihash;
 use std::io::Error;
 use std::sync::{Arc, Mutex};
 
+mod protobuf_structs;
+
 #[derive(Clone)]
 pub struct Bitswap {
     p2p: Arc<Mutex<Service>>,

src/bitswap/protobuf_structs/mod.rs

@@ -0,0 +1 @@
+pub mod bitswap;

src/bitswap/regen_bitswap_proto.sh

@@ -0,0 +1,13 @@
+#!/bin/sh
+
+# This script regenerates the `bitswap_proto.rs` file from `bitswap.proto`.
+
+docker run --rm -v `pwd`:/usr/code:z -w /usr/code rust /bin/bash -c " \
+    apt-get update; \
+    apt-get install -y protobuf-compiler; \
+    cargo install --version 2.0.2 protobuf-codegen; \
+    protoc --rust_out . bitswap.proto"
+
+sudo chown $USER:$USER *.rs
+
+mv -f bitswap.rs ./protobuf_structs/bitswap.rs