From c69fa66f609925a98acf8dc7f645b9b50ce3a8ba Mon Sep 17 00:00:00 2001
From: rodri <rgl@antares-labs.eu>
Date: Sat, 11 Jun 2022 22:37:59 +0000
Subject: implemented a custom PDU/frame structure on top of UDP for game
 networking.

---
 musw.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

(limited to 'musw.c')

diff --git a/musw.c b/musw.c
index 70a8a4b..10ca01b 100644
--- a/musw.c
+++ b/musw.c
@@ -1,5 +1,6 @@
 #include <u.h>
 #include <libc.h>
+#include <ip.h>
 #include <bio.h>
 #include <thread.h>
 #include <draw.h>
@@ -219,12 +220,23 @@ threadnetsend(void *arg)
 	uchar buf[1024];
 	int fd, n;
 	ulong kdown;
+	Frame *frame;
 
 	fd = *(int*)arg;
+	frame = emalloc(sizeof(Frame)+sizeof(kdown));
+	frame->udp = nil;
+	frame->seq = 223;
+	frame->ack = 222;
+	frame->id = ntruerand(100);
+	frame->len = sizeof(kdown);
 
 	for(;;){
 		kdown = recvul(kchan);
-		n = pack(buf, sizeof buf, "k", kdown);
+		frame->data[0] = kdown>>24;
+		frame->data[1] = kdown>>16;
+		frame->data[2] = kdown>>8;
+		frame->data[3] = kdown;
+		n = pack(buf, sizeof buf, "F", frame);
 		if(write(fd, buf, n) != n)
 			sysfatal("write: %r");
 	}
-- 
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