8 files changed, 172 insertions, 2 deletions
diff --git a/.travis.yml b/.travis.yml
index ffc6f13c21..f78ed83ec7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,9 @@
 language: rust
-cache: cargo
+cache:
+  cargo: true
+  directories:
+    - $HOME/build-deps
+
 rust:
   - stable
   - nightly
@@ -8,14 +12,23 @@ os:
   - osx
 
 before_script:
+  - if [[ "$TRAVIS_OS_NAME" == "osx"   ]]; then mkdir -p $HOME/.local/bin && ln -s /usr/local/bin/greadlink $HOME/.local/bin/readlink ; fi
+  - $(./build-deps/install-build-deps.sh $HOME/build-deps)
   - (cargo install rustfmt || true)
   - export PATH=$HOME/.cargo/bin:$HOME/.local/bin:$PATH
   - rustfmt --version
+  - env
 
 script:
   - cargo build --verbose
   - cargo test --all --verbose
-  - find src/ tests/ benches/ talpid_* -iname "*.rs" -print0 | xargs -0 -n1 rustfmt --write-mode=diff
+  - find . -iname "*.rs" -not -path "*/target/*" -print0 | xargs -0 -n1 rustfmt --write-mode=diff
+
+before_cache:
+    ## zmq-sys caches the location of `libzmq`, if that location ever changes e.g.
+    ## if the version changes we will get into trouble. This rm will make us
+    ## rebuild it every time instead
+  - rm -rf target/debug/build/zmq*
 
 notifications:
   email:
diff --git a/Cargo.lock b/Cargo.lock
index 4fb8fb2009..302fcf47dc 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -84,6 +84,11 @@ dependencies = [
 
 [[package]]
 name = "error-chain"
+version = "0.7.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "error-chain"
 version = "0.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
@@ -115,6 +120,26 @@ version = "0.2.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
+name = "log"
+version = "0.3.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "metadeps"
+version = "1.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "error-chain 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pkg-config 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "toml 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "pkg-config"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
 name = "rustc-demangle"
 version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -140,6 +165,7 @@ dependencies = [
  "assert_matches 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "clonablechild 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "error-chain 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "zmq 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -153,6 +179,11 @@ dependencies = [
 ]
 
 [[package]]
+name = "toml"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
 name = "unicode-segmentation"
 version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -177,6 +208,25 @@ name = "winapi-build"
 version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "zmq"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.20 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "zmq-sys 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "zmq-sys"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.20 (registry+https://github.com/rust-lang/crates.io-index)",
+ "metadeps 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [metadata]
 "checksum ansi_term 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "23ac7c30002a5accbf7e8987d0632fa6de155b7c3d39d0067317a391e00a2ef6"
 "checksum assert_matches 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "9aa85694f8820620d0df15526544e1c3fbbac7ba3874781d874d7d6499a53724"
@@ -187,16 +237,23 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum clap 2.20.3 (registry+https://github.com/rust-lang/crates.io-index)" = "f89819450aa94325998aa83ce7ea142db11ad24c725d6bc48459845e0d6d9f18"
 "checksum clonablechild 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "4a4946a850c1e921fbdd9a1f92bf1298c41a301c0f6e9bacbabf95ea7d6d0225"
 "checksum dbghelp-sys 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "97590ba53bcb8ac28279161ca943a924d1fd4a8fb3fa63302591647c4fc5b850"
+"checksum error-chain 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)" = "318cb3c71ee4cdea69fdc9e15c173b245ed6063e1709029e8fd32525a881120f"
 "checksum error-chain 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)" = "6930e04918388a9a2e41d518c25cf679ccafe26733fb4127dbf21993f2575d46"
 "checksum gcc 0.3.42 (registry+https://github.com/rust-lang/crates.io-index)" = "291055c78f59ca3d84c99026c9501c469413d386bb46be1e1cf1d285cd1db3b0"
 "checksum kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7507624b29483431c0ba2d82aece8ca6cdba9382bff4ddd0f7490560c056098d"
 "checksum lazy_static 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "6abe0ee2e758cd6bc8a2cd56726359007748fbf4128da998b65d0b70f881e19b"
 "checksum libc 0.2.20 (registry+https://github.com/rust-lang/crates.io-index)" = "684f330624d8c3784fb9558ca46c4ce488073a8d22450415c5eb4f4cfb0d11b5"
+"checksum log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "ab83497bf8bf4ed2a74259c1c802351fcd67a65baa86394b6ba73c36f4838054"
+"checksum metadeps 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "829fffe7ea1d747e23f64be972991bc516b2f1ac2ae4a3b33d8bea150c410151"
+"checksum pkg-config 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)" = "3a8b4c6b8165cd1a1cd4b9b120978131389f64bdaf456435caa41e630edba903"
 "checksum rustc-demangle 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "1430d286cadb237c17c885e25447c982c97113926bb579f4379c0eca8d9586dc"
 "checksum strsim 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b4d15c810519a91cf877e7e36e63fe068815c678181439f2f29e2562147c3694"
 "checksum term_size 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "71662702fe5cd2cf95edd4ad655eea42f24a87a0e44059cbaa4e55260b7bc331"
+"checksum toml 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "736b60249cb25337bc196faa43ee12c705e426f3d55c214d73a4e7be06f92cb4"
 "checksum unicode-segmentation 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "7baebdc1df1363fa66161fca2fe047e4f4209011cc7e045948298996afdf85df"
 "checksum unicode-width 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "bf3a113775714a22dcb774d8ea3655c53a32debae63a063acc00a91cc586245f"
 "checksum vec_map 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "cac5efe5cb0fa14ec2f84f83c701c562ee63f6dcc680861b21d65c682adfb05f"
 "checksum winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "167dc9d6949a9b857f3451275e911c3f44255842c1f7a76f33c55103a909087a"
 "checksum winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "2d315eee3b34aca4797b2da6b13ed88266e6d612562a0c46390af8299fc699bc"
+"checksum zmq 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)" = "9623581b345b8a85fb72cae9b2cb67116d73ccb141e6c02f689e311962b74f9c"
+"checksum zmq-sys 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)" = "ecf3aafc58984279d9b8f776703ef569d32ae386353192a267cd6e711da70dde"
diff --git a/Cargo.toml b/Cargo.toml
index abce286414..c6f0ad6ee7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,6 +8,9 @@ description = "Core backend functionality of the Mullvad VPN client"
 clonablechild = "0.1"
 error-chain = "0.8"
 
+[target.'cfg(not(windows))'.dependencies]
+zmq = "0.8"
+
 [dev-dependencies]
 assert_matches = "1.0"
 
diff --git a/build-deps/install-build-deps.sh b/build-deps/install-build-deps.sh
new file mode 100755
index 0000000000..fd72129b69
--- /dev/null
+++ b/build-deps/install-build-deps.sh
@@ -0,0 +1,23 @@
+#! /usr/bin/env bash
+set -eu
+
+## Everything printed to stdout will be run by travis. So only print
+## stuff that needs to be set, e.g. environment variables.
+
+SCRIPT_DIR=$(readlink -f $(dirname $0))
+INSTALL_DIR=$(readlink -f ${1:-"$SCRIPT_DIR"})
+
+################################################################################
+################################## ZMQ #########################################
+
+mkdir -p $INSTALL_DIR/zmq/unix
+$(dirname $0)/zmq/build.sh $INSTALL_DIR/zmq/unix >&2
+
+echo "# ZeroMQ is installed, now run" >&2
+echo "export LIBZMQ_PREFIX=$INSTALL_DIR/zmq/unix" | tee /dev/stderr
+set +u
+echo "export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$INSTALL_DIR/zmq/unix/lib" | tee /dev/stderr
+set -u
+
+################################## ZMQ #########################################
+################################################################################
diff --git a/build-deps/zmq/.gitignore b/build-deps/zmq/.gitignore
new file mode 100644
index 0000000000..d5ef630613
--- /dev/null
+++ b/build-deps/zmq/.gitignore
@@ -0,0 +1,2 @@
+libzmq-git
+linux
diff --git a/build-deps/zmq/build.sh b/build-deps/zmq/build.sh
new file mode 100755
index 0000000000..dc8cc49a84
--- /dev/null
+++ b/build-deps/zmq/build.sh
@@ -0,0 +1,60 @@
+#! /usr/bin/env bash
+set -eu
+
+WD=$(pwd)/$(dirname $0)
+GIT_DIR=libzmq-git
+INSTALL_DIR=$(readlink -f $1)
+USE_CACHE=${USE_CACHE:-"1"}
+
+
+
+
+### TEST IF ZMQ IS BUILT ###
+F1=$INSTALL_DIR/include/zmq.h
+F2=$INSTALL_DIR/lib/libzmq.so
+if [[ -f $F1 && -f $F2 ]]; then
+    ZMQ_IS_BUILT=1
+else
+    ZMQ_IS_BUILT=0
+    echo "Cannot find $F1 or $F2, will rebuild ZeroMQ"
+fi
+
+if [[ $USE_CACHE == 1 && $ZMQ_IS_BUILT == 1 ]]; then
+    echo "Using a cached version of ZeroMQ"
+    exit 0
+fi
+
+
+echo "If this fails, make sure that you have installed the packages needed to \
+build zmq, for ubuntu and OS X they can be found in\
+$WD/install-build-deps-{apt|osx}.sh"
+echo ""
+
+
+
+
+### Get the code ###
+if [ -e "$WD/$GIT_DIR/.git" ]; then
+    (
+        cd "$WD/$GIT_DIR"
+        git fetch
+        git checkout origin/master
+    )
+else
+    git clone --depth=1 git@github.com:zeromq/zeromq4-1.git "$WD/$GIT_DIR"
+fi
+
+### Build ###
+## We skip running the tests here as we trust the zmq maintainers to publish
+## working code :) Living life on the wild side
+trap "cd -" EXIT
+cd "$WD/$GIT_DIR"
+
+set -x
+./autogen.sh
+./configure --prefix="$INSTALL_DIR"    # add other options here
+make
+make install
+set +x
+
+echo "WOOWZ, it's built now. All the good stuff is in $INSTALL_DIR"
diff --git a/build-deps/zmq/install-build-deps-apt.sh b/build-deps/zmq/install-build-deps-apt.sh
new file mode 100644
index 0000000000..6a762f603c
--- /dev/null
+++ b/build-deps/zmq/install-build-deps-apt.sh
@@ -0,0 +1,6 @@
+#! /usr/bin/env bash
+
+set -eux
+
+apt-get update
+apt-get -y install git build-essential libtool autoconf automake uuid-dev pkg-config
diff --git a/build-deps/zmq/install-build-deps-osx.sh b/build-deps/zmq/install-build-deps-osx.sh
new file mode 100644
index 0000000000..c52dc026e8
--- /dev/null
+++ b/build-deps/zmq/install-build-deps-osx.sh
@@ -0,0 +1,6 @@
+#! /usr/bin/env bash
+
+set -eux
+
+brew update
+brew install libtool autoconf automake pkg-config