From cac7c352a1ece2744de42128a9c69df16f05d26a Mon Sep 17 00:00:00 2001
From: Marvin Borner
Date: Sat, 26 Sep 2020 16:29:49 +0200
Subject: Very simple icmp ping handling

---
 kernel/drivers/rtl8139.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'kernel/drivers')

diff --git a/kernel/drivers/rtl8139.c b/kernel/drivers/rtl8139.c
index 6487eca..2fc8f07 100644
--- a/kernel/drivers/rtl8139.c
+++ b/kernel/drivers/rtl8139.c
@@ -25,6 +25,7 @@ u8 *rtl8139_get_mac()
 
 void rtl8139_receive_packet()
 {
+	printf("%x\n", current_packet_ptr);
 	u16 *t = (u16 *)(rx_buffer + current_packet_ptr);
 	u16 length = *(t + 1);
 	t += 2;
@@ -35,7 +36,7 @@ void rtl8139_receive_packet()
 
 	current_packet_ptr = (current_packet_ptr + length + 4 + 3) & (~3);
 
-	if (current_packet_ptr > RX_BUF_SIZE)
+	if (current_packet_ptr >= RX_BUF_SIZE)
 		current_packet_ptr -= RX_BUF_SIZE;
 
 	outw(rtl_iobase + RTL_PORT_RXPTR, current_packet_ptr - 0x10);
@@ -46,6 +47,7 @@ static u8 tsd_array[4] = { 0x10, 0x14, 0x18, 0x1C };
 static u8 tx_current = 0;
 void rtl8139_send_packet(void *data, u32 len)
 {
+	printf("Sending packet %d\n", len);
 	outl(rtl_iobase + tsad_array[tx_current], (u32)data);
 	outl(rtl_iobase + tsd_array[tx_current++], len);
 	if (tx_current > 3)
-- 
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