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#include <syslinux/pxe_api.h>
#include <com32.h>
#include <core.h>
#include <net.h>
#include <pxe.h>
#include <minmax.h>
/* Common receive buffer */
static __lowmem char packet_buf[PKTBUF_SIZE] __aligned(16);
extern uint16_t get_port(void);
extern void free_port(uint16_t);
/**
* Open a socket
*
* @param:socket, the socket to open
* @param:proto, the protocol of the new connection
*
* @out: error code, 0 on success, -1 on failure
*/
int net_core_open(struct pxe_pvt_inode *socket __unused,
enum net_core_proto proto)
{
struct net_private *priv = &socket->private;
/* The legacy stack only supports UDP */
if (proto != NET_CORE_UDP)
return -1;
/* Allocate local UDP port number */
priv->tftp_localport = get_port();
return 0;
}
/**
* Close a socket
*
* @param:socket, the socket to open
*/
void net_core_close(struct pxe_pvt_inode *socket)
{
struct net_private *priv = &socket->private;
if (priv->tftp_localport)
free_port(priv->tftp_localport);
}
/**
* Establish a connection on an open socket
*
* @param:socket, the open socket
* @param:ip, the ip address
* @param:port, the port number, host-byte order
*/
void net_core_connect(struct pxe_pvt_inode *socket, uint32_t ip,
uint16_t port)
{
struct net_private *priv = &socket->private;
socket->tftp_remoteport = htons(port);
priv->tftp_remoteip = ip;
}
/**
* Tear down a connection on an open socket
*
* @param:socket, the open socket
*/
void net_core_disconnect(struct pxe_pvt_inode *socket __unused)
{
}
/**
* Read data from the network stack
*
* @param:socket, the open socket
* @param:buf, location of buffer to store data
* @param:buf_len, size of buffer
* @out: src_ip, ip address of the data source
* @out: src_port, port number of the data source, host-byte order
*/
int net_core_recv(struct pxe_pvt_inode *socket, void *buf, uint16_t *buf_len,
uint32_t *src_ip, uint16_t *src_port)
{
static __lowmem struct s_PXENV_UDP_READ udp_read;
struct net_private *priv = &socket->private;
uint16_t bytes;
int err;
udp_read.status = 0;
udp_read.buffer = FAR_PTR(packet_buf);
udp_read.buffer_size = PKTBUF_SIZE;
udp_read.dest_ip = IPInfo.myip;
udp_read.d_port = priv->tftp_localport;
err = pxe_call(PXENV_UDP_READ, &udp_read);
if (err)
return err;
if (udp_read.status)
return udp_read.status;
bytes = min(udp_read.buffer_size, *buf_len);
memcpy(buf, packet_buf, bytes);
*src_ip = udp_read.src_ip;
*src_port = ntohs(udp_read.s_port);
*buf_len = bytes;
return 0;
}
/**
* Send a UDP packet.
*
* @param:socket, the open socket
* @param:data, data buffer to send
* @param:len, size of data bufer
*/
void net_core_send(struct pxe_pvt_inode *socket, const void *data, size_t len)
{
static __lowmem struct s_PXENV_UDP_WRITE udp_write;
struct net_private *priv = &socket->private;
void *lbuf;
uint16_t tid;
lbuf = lmalloc(len);
if (!lbuf)
return;
memcpy(lbuf, data, len);
tid = priv->tftp_localport; /* TID(local port No) */
udp_write.buffer = FAR_PTR(lbuf);
udp_write.ip = priv->tftp_remoteip;
udp_write.gw = gateway(udp_write.ip);
udp_write.src_port = tid;
udp_write.dst_port = socket->tftp_remoteport;
udp_write.buffer_size = len;
pxe_call(PXENV_UDP_WRITE, &udp_write);
lfree(lbuf);
}
/**
* Network stack-specific initialization
*
* Initialize UDP stack
*/
void net_core_init(void)
{
int err;
static __lowmem struct s_PXENV_UDP_OPEN udp_open;
udp_open.src_ip = IPInfo.myip;
err = pxe_call(PXENV_UDP_OPEN, &udp_open);
if (err || udp_open.status) {
printf("Failed to initialize UDP stack ");
printf("%d\n", udp_open.status);
kaboom();
}
}
void probe_undi(void)
{
}
void pxe_init_isr(void)
{
}
int reset_pxe(void)
{
static __lowmem struct s_PXENV_UDP_CLOSE udp_close;
int err = 0;
pxe_idle_cleanup();
pxe_call(PXENV_UDP_CLOSE, &udp_close);
return err;
}
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