This document describes the networking subsystem of the Kyronix kernel. It is the child of Kernel and parent of networking component documents.
| Component | Source | Description |
|---|
| Network Stack | net/net.c | lwIP initialization and polling |
| lwIP Glue | net/lwip_glue.c | Kernel memory allocator bridge |
| Kyronix Netif | net/netif/kyronix_netif.c | lwIP network interface driver |
| VirtIO-Net | drivers/virtio_net.c | Hardware NIC driver |
User-space (sockets)
|
v
Syscall layer (socket.c)
|
v
lwIP TCP/IP stack
|
v
kyronix_netif (lwIP netif)
|
v
virtio-net driver
|
v
QEMU virtio-net device
| Setting | Value |
|---|
| IP Address | 10.0.2.15 |
| Subnet Mask | 255.255.255.0 (/24) |
| Gateway | 10.0.2.2 |
| DNS Server | 10.0.2.3 |
These are static addresses matching QEMU’s default user-mode networking (SLIRP) configuration.
| Type | Source | Description |
|---|
| Unix domain | fs/unix_socket.c | Local IPC sockets |
| Internet | fs/inet_socket.c | TCP/UDP over lwIP |
| Function | Description |
|---|
net_init() | Initialize lwIP and register network interface |
net_poll() | Drain virtio-net RX queue, process lwIP timeouts |
net_receive(frame, len) | Feed raw Ethernet frame to lwIP |
Last reviewed: 2026-07-22