From 346407a55f00111a675304433ff5a7ee19569098 Mon Sep 17 00:00:00 2001
From: Camil Staps
Date: Mon, 14 Dec 2015 10:25:09 +0000
Subject: Finish assignment 5

---
 CamilStaps-s4498062-Assignment-5/ex3/readme     | 10 ++++++++++
 CamilStaps-s4498062-Assignment-5/ex3/receive.sh | 14 ++++++++++++++
 CamilStaps-s4498062-Assignment-5/ex3/send.sh    | 16 ++++++++++++++++
 3 files changed, 40 insertions(+)
 create mode 100644 CamilStaps-s4498062-Assignment-5/ex3/readme
 create mode 100755 CamilStaps-s4498062-Assignment-5/ex3/receive.sh
 create mode 100755 CamilStaps-s4498062-Assignment-5/ex3/send.sh

(limited to 'CamilStaps-s4498062-Assignment-5/ex3')

diff --git a/CamilStaps-s4498062-Assignment-5/ex3/readme b/CamilStaps-s4498062-Assignment-5/ex3/readme
new file mode 100644
index 0000000..cb95949
--- /dev/null
+++ b/CamilStaps-s4498062-Assignment-5/ex3/readme
@@ -0,0 +1,10 @@
+The sender opens a port for a 1, doesn't do anything to send a 0. Obviously, the receiver should know the sender's IP address.
+
+Usage on the receiver's side:
+
+    $ ./receive.sh
+
+Usage on the sender's side:
+
+    $ echo 010101110110110 | ./send.sh
+
diff --git a/CamilStaps-s4498062-Assignment-5/ex3/receive.sh b/CamilStaps-s4498062-Assignment-5/ex3/receive.sh
new file mode 100755
index 0000000..4944d9c
--- /dev/null
+++ b/CamilStaps-s4498062-Assignment-5/ex3/receive.sh
@@ -0,0 +1,14 @@
+#!/bin/bash
+SERVER=localhost
+PORT=12345
+
+while :; do
+    timeout 1 nc "$SERVER" "$PORT" 2>/dev/null
+    if [[ "$?" == "1" ]]; then
+        echo -n "0"
+        sleep 1
+    else
+        echo -n "1"
+    fi
+done
+
diff --git a/CamilStaps-s4498062-Assignment-5/ex3/send.sh b/CamilStaps-s4498062-Assignment-5/ex3/send.sh
new file mode 100755
index 0000000..b0ad02d
--- /dev/null
+++ b/CamilStaps-s4498062-Assignment-5/ex3/send.sh
@@ -0,0 +1,16 @@
+#!/bin/bash
+PORT=12345
+
+# For every input line
+while IFS= read -r payload; do
+    # For every character
+    for (( i=0; i<${#payload}+1; i+=1 )); do
+        char="${payload:$i:1}"
+        if [[ "$char" == "1" ]]; then
+            timeout 1 nc -lp "$PORT" >/dev/null
+        else
+            sleep 1
+        fi
+    done
+done
+
-- 
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