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fix(net): Correct QEMU gateway ARP MAC address, enable dynamic ARP sender learning, and add run-remote target

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subhobhai943 committed 2026-08-17 13:59:29 +05:30
1 parent 9f3cfe5d54
commit 8a90d88f70
2 files changed
+11 -2
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Makefile
+6
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@@ -123,6 +123,12 @@ run-server: $(IMAGE)
-netdev user,id=net0,hostfwd=tcp::2222-:22,hostfwd=tcp::8080-:80 \ -netdev user,id=net0,hostfwd=tcp::2222-:22,hostfwd=tcp::8080-:80 \
-device e1000,netdev=net0 -serial stdio -display none -device e1000,netdev=net0 -serial stdio -display none
run-remote: $(IMAGE)
qemu-system-x86_64 -drive format=raw,file=$(IMAGE) \
-netdev user,id=net0,hostfwd=tcp::2222-:22,hostfwd=tcp::8080-:80 \
-device e1000,netdev=net0 \
-serial telnet:0.0.0.0:2222,server,nowait -display none
debug: $(IMAGE) debug: $(IMAGE)
qemu-system-x86_64 -drive format=raw,file=$(IMAGE) \ qemu-system-x86_64 -drive format=raw,file=$(IMAGE) \
-netdev user,id=net0,hostfwd=tcp::2222-:22,hostfwd=tcp::8080-:80 \ -netdev user,id=net0,hostfwd=tcp::2222-:22,hostfwd=tcp::8080-:80 \
net/core/net.c
+5 -2
View File
@@ -235,6 +235,9 @@ void net_receive(const uint8_t* packet, uint16_t length) {
const ip_header_t* ip = (const ip_header_t*)payload; const ip_header_t* ip = (const ip_header_t*)payload;
uint8_t ihl = (ip->ihl_version & 0x0F) * 4; uint8_t ihl = (ip->ihl_version & 0x0F) * 4;
if (payload_len >= ihl) { if (payload_len >= ihl) {
// Dynamically learn sender's MAC address in ARP cache
arp_cache_insert(ip->src_ip, eth->src_mac);
// NetFilter inspection hook // NetFilter inspection hook
if (filter_evaluate(FILTER_HOOK_LOCAL_IN, ip->protocol, ip->src_ip, ip->dst_ip, 0, 0, payload_len) == FILTER_ACTION_DROP) { if (filter_evaluate(FILTER_HOOK_LOCAL_IN, ip->protocol, ip->src_ip, ip->dst_ip, 0, 0, payload_len) == FILTER_ACTION_DROP) {
return; // Dropped by firewall return; // Dropped by firewall
@@ -315,8 +318,8 @@ void net_init(void) {
primary_if.dns = ip_parse("10.0.2.3"); primary_if.dns = ip_parse("10.0.2.3");
primary_if.is_up = true; primary_if.is_up = true;
// Seed gateway in ARP cache // Seed gateway in ARP cache (QEMU Virtual Router MAC)
uint8_t qemu_gw[6] = {0x52, 0x54, 0x00, 0x12, 0x34, 0x56}; uint8_t qemu_gw[6] = {0x52, 0x55, 0x0A, 0x00, 0x02, 0x02};
arp_cache_insert(primary_if.gateway, qemu_gw); arp_cache_insert(primary_if.gateway, qemu_gw);
printk(KERN_INFO "NET: eth0 configured (IP: 10.0.2.15, GW: 10.0.2.2, Mask: 255.255.255.0)\n"); printk(KERN_INFO "NET: eth0 configured (IP: 10.0.2.15, GW: 10.0.2.2, Mask: 255.255.255.0)\n");