From f605d8538fde29e29420180746476802f3198144 Mon Sep 17 00:00:00 2001
From: Anton Kling <anton@kling.gg>
Date: Wed, 1 Nov 2023 03:00:00 +0100
Subject: Kernel: Add a simple TCP implementation
---
kernel/network/ipv4.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
(limited to 'kernel/network/ipv4.c')
diff --git a/kernel/network/ipv4.c b/kernel/network/ipv4.c
index 099aa0d..7f480a3 100644
--- a/kernel/network/ipv4.c
+++ b/kernel/network/ipv4.c
@@ -1,9 +1,11 @@
#include <assert.h>
+#include <drivers/pit.h>
#include <kmalloc.h>
#include <network/arp.h>
#include <network/bytes.h>
#include <network/ethernet.h>
#include <network/ipv4.h>
+#include <network/tcp.h>
#include <network/udp.h>
#include <string.h>
@@ -59,8 +61,11 @@ void send_ipv4_packet(uint32_t ip, uint8_t protocol, const uint8_t *payload,
uint8_t mac[6];
uint8_t ip_copy[4]; // TODO: Do I need to do this?
memcpy(ip_copy, &ip, sizeof(uint8_t[4]));
- get_mac_from_ip(ip_copy, mac);
+ for (; !get_mac_from_ip(ip_copy, mac);)
+ ;
+ kprintf("pre send_ethernet: %x\n", pit_num_ms());
send_ethernet_packet(mac, 0x0800, packet, packet_length);
+ kprintf("after send_ethernet: %x\n", pit_num_ms());
kfree(packet);
}
@@ -88,6 +93,9 @@ void handle_ipv4(const uint8_t *payload, uint32_t packet_length) {
uint8_t protocol = *(payload + 9);
switch (protocol) {
+ case 0x6:
+ handle_tcp(src_ip, payload + 20, ipv4_total_length - 20);
+ break;
case 0x11:
handle_udp(src_ip, payload + 20, ipv4_total_length - 20);
break;
--
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