From dc2e8516555663a9753c16fcfa07983ce6ee394c Mon Sep 17 00:00:00 2001
From: haskal <haskal@bepis.xyz>
Date: Tue, 10 Mar 2020 23:21:47 -0400
Subject: [PATCH] Create test environment

---
 .gitignore               |  3 ++-
 .rustup/settings.toml    |  4 ++++
 Makefile                 |  8 ++++++++
 rust-toolchain           |  1 +
 scripts/create-net-ns.sh | 10 ++++++++++
 5 files changed, 25 insertions(+), 1 deletion(-)
 create mode 100644 .rustup/settings.toml
 create mode 100644 rust-toolchain
 create mode 100755 scripts/create-net-ns.sh

diff --git a/.gitignore b/.gitignore
index f0fbb80..56e7c6c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,4 +4,5 @@ target
 *~
 *\#
 3700send
-3700recv
\ No newline at end of file
+3700recv
+.netsim
diff --git a/.rustup/settings.toml b/.rustup/settings.toml
new file mode 100644
index 0000000..1551bc9
--- /dev/null
+++ b/.rustup/settings.toml
@@ -0,0 +1,4 @@
+profile = "default"
+version = "12"
+
+[overrides]
diff --git a/Makefile b/Makefile
index 65a1091..a72b931 100644
--- a/Makefile
+++ b/Makefile
@@ -25,3 +25,11 @@ t: test
 	rustup install nightly
 	rustup install stable
 	touch $@
+
+.netsim:
+	mkdir $@
+	curl -Ss https://course.ccs.neu.edu/cs3700sp20/archive/tcp-sim.tgz | tar xzf - -C $@
+	sed -i '/.usr.bin.sudo/d' .netsim/netsim
+
+netsim-shell: .netsim
+	./scripts/create-net-ns.sh
diff --git a/rust-toolchain b/rust-toolchain
new file mode 100644
index 0000000..bf867e0
--- /dev/null
+++ b/rust-toolchain
@@ -0,0 +1 @@
+nightly
diff --git a/scripts/create-net-ns.sh b/scripts/create-net-ns.sh
new file mode 100755
index 0000000..b54edea
--- /dev/null
+++ b/scripts/create-net-ns.sh
@@ -0,0 +1,10 @@
+#!/bin/bash
+
+DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" &>/dev/null && pwd)"
+cd $(dirname $DIR)
+
+sudo unshare -n capsh --caps="cap_net_admin+eip cap_setpcap,cap_setuid,cap_setgid+ep" --keep=1 \
+    --user=$USER --addamb=cap_net_admin \
+    -- -c "export PATH=$PWD/.netsim:\$PATH; export HOME=$PWD; /usr/bin/ip link set lo up; netsim; \
+           tc qdisc show dev lo; /bin/bash --init-file <(echo unset HISTFILE)"
+true