From e805ea1aefc297eefb3aa2d4d737df82e1e05998 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Juhani=20Krekel=C3=A4?= <juhani@krekelä.fi>
Date: Sun, 14 Jul 2019 20:39:45 +0300
Subject: [PATCH] Process ACK

---
 ethermess-backend.c | 14 ++++++--------
 ethermess.py        |  8 +++++++-
 2 files changed, 13 insertions(+), 9 deletions(-)

diff --git a/ethermess-backend.c b/ethermess-backend.c
index 829fd9f..02adba4 100644
--- a/ethermess-backend.c
+++ b/ethermess-backend.c
@@ -805,16 +805,14 @@ void handle_ack(const unsigned char source_mac[6], const unsigned char *data, si
 		return;
 	}
 
-	char mac[18];
-	format_mac(source_mac, mac);
+	// Type of event: ACK received
+	writeallx(1, "a", 1);
 
-	if (printf("%s ack %" PRIu16 "\n", mac, msgid) == -1) {
-		err(1, "printf");
-	}
+	// MAC
+	writeallx(1, source_mac, 6);
 
-	if (fflush(stdout) == EOF) {
-		err(1, "fflush");
-	}
+	// Msgid
+	writeallx_u16(1, msgid);
 
 	if (own_message_send_state == WAITING_ACK && msgid == own_message_msgid) {
 		own_message_send_state = IDLE;
diff --git a/ethermess.py b/ethermess.py
index b3615d2..de60607 100644
--- a/ethermess.py
+++ b/ethermess.py
@@ -92,7 +92,7 @@ def eventloop(proc):
 
 				elif event_type == b'i':
 					# Msgid for message
-					msgid = readall_u16(proc.stdout);
+					msgid = readall_u16(proc.stdout)
 					print('(msgid: %i)' % msgid) #debg
 
 				elif event_type == b'm':
@@ -103,6 +103,12 @@ def eventloop(proc):
 
 					print('<%s> %s' % (format_mac(source_mac), message.decode('utf-8')))
 
+				elif event_type == b'a':
+					# ACK received
+					source_mac = readall(proc.stdout, 6)
+					msgid = readall_u16(proc.stdout)
+					print('(ack: %i)' % msgid) #debg
+
 				else:
 					# Not sth we handle yet
 					data = proc.stdout.read(1023)