From 359ea12aeee4dd6dfb79c9ba44d7059714e4fa95 Mon Sep 17 00:00:00 2001
From: Anton Kling <anton@kling.gg>
Date: Wed, 1 Nov 2023 21:43:17 +0100
Subject: ARP: Save the IP, MAC of incoming ARP requests

---
 kernel/network/arp.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

(limited to 'kernel/network')

diff --git a/kernel/network/arp.c b/kernel/network/arp.c
index ddeb553..dfa1131 100644
--- a/kernel/network/arp.c
+++ b/kernel/network/arp.c
@@ -120,7 +120,12 @@ void handle_arp(const u8 *payload) {
     print_mac("dsthw: ", data->dsthw);
     print_ip("dstpr: ", data->dstpr);
 
-    assert(0 == memcmp(data->dstpr, ip_address, sizeof(u8[4])));
+    struct ARP_TABLE_ENTRY *entry = find_arp_entry_to_use();
+    entry->is_used = 1;
+    memcpy(entry->mac, data->srchw, sizeof(uint8_t[6]));
+    memcpy(entry->ip, data->srcpr, sizeof(uint8_t[4]));
+
+    assert(0 == memcmp(data->dstpr, ip_address, sizeof(uint8_t[4])));
 
     // Now we have to construct a ARP response
     struct ARP_DATA response;
-- 
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