Create test environment

.gitignore

@@ -4,4 +4,5 @@ target
 *~
 *\#
 3700send
-3700recv
+3700recv
+.netsim

.rustup/settings.toml

@@ -0,0 +1,4 @@
+profile = "default"
+version = "12"
+
+[overrides]

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

rust-toolchain

@@ -0,0 +1 @@
+nightly

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