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/*
* RTEMS for Nintendo DS sgIP compatibility glue.
*
* Copyright (c) 2008 by Matthieu Bucchianeri <mbucchia@gmail.com>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
*
* http://www.rtems.com/license/LICENSE
*/
#include <rtems.h>
#include <stdlib.h>
#include <sys/mbuf.h>
#undef malloc
#undef free
#include "compat.h"
unsigned long sgIP_timems = 0;
static sgIP_Hub_HWInterface hw;
/*
* Dswifi stub functions
*/
void *
sgIP_malloc (int size)
{
return malloc (size);
}
void
sgIP_free (void *ptr)
{
free (ptr);
}
/*
* called by dswifi on initialization
*/
void
sgIP_Init (void)
{
}
/*
* network layer stack timer called periodically
*/
void
sgIP_Timer (int num_ms)
{
sgIP_timems += num_ms;
}
/*
* add a new hardware interface
* should be called once
*/
sgIP_Hub_HWInterface *
sgIP_Hub_AddHardwareInterface (int (*TransmitFunction)
(sgIP_Hub_HWInterface *, sgIP_memblock *),
int (*InterfaceInit) (sgIP_Hub_HWInterface *))
{
hw.TransmitFunction = TransmitFunction;
if (InterfaceInit)
InterfaceInit (&hw);
return &hw;
}
/*
* callback on packet reception
* translate memblock to mbuf
*/
extern void wifi_signal (struct mbuf *);
int
sgIP_Hub_ReceiveHardwarePacket (sgIP_Hub_HWInterface * hw,
sgIP_memblock * packet)
{
struct mbuf *m;
unsigned char *p;
/* reserve the mbuf */
MGETHDR (m, M_WAIT, MT_DATA);
MCLGET (m, M_WAIT);
/* copy data to mbuf */
p = mtod (m, unsigned char *);
m->m_len = m->m_pkthdr.len = packet->thislength;
memcpy (p, packet->datastart, packet->thislength);
/* free the memblock */
sgIP_memblock_free (packet);
/* signal packet arrival to the driver */
wifi_signal (m);
return 0;
}
/*
* function for sending a packet (translates mbuf to memblock)
*/
void
compat_wifi_output (struct mbuf *m)
{
sgIP_memblock *packet;
size_t size = 0;
struct mbuf *l;
/* compute total size of the packet */
for (l = m; l != NULL; l = l->m_next)
size += l->m_len;
/* allocate memblock */
packet = sgIP_memblock_allocHW (14, size - 14);
/* copy data from mbuf to memblock */
m_copydata (m, 0, size, packet->datastart);
/* call TransmitFunction */
hw.TransmitFunction (&hw, packet);
/* free mbuf */
m_freem (m);
}
/*
* allocate a memblock
*/
sgIP_memblock *
sgIP_memblock_allocHW (int headersize, int packetsize)
{
sgIP_memblock *mb;
mb =
(sgIP_memblock *) sgIP_malloc (SGIP_MEMBLOCK_HEADERSIZE +
SGIP_MAXHWHEADER + packetsize);
if (!mb)
return 0;
mb->totallength = headersize + packetsize;
mb->thislength = mb->totallength;
mb->datastart = mb->reserved + SGIP_MAXHWHEADER - headersize;
mb->next = 0;
return mb;
}
/*
* release a memblock
*/
void
sgIP_memblock_free (sgIP_memblock * mb)
{
sgIP_memblock *f;
return;
SGIP_INTR_PROTECT ();
while (mb) {
mb->totallength = 0;
mb->thislength = 0;
f = mb;
mb = mb->next;
sgIP_free (f);
}
SGIP_INTR_UNPROTECT ();
}
/*
* start DHCP discovery
*/
void
sgIP_DHCP_Start (sgIP_Hub_HWInterface * interface, int getDNS)
{
}
/*
* get DHCP state
*/
int
sgIP_DHCP_Update (void)
{
return SGIP_DHCP_STATUS_SUCCESS;
}
/* ----------------- not my problem things ---------------- */
/* flush ARP table */
void
sgIP_ARP_FlushInterface (sgIP_Hub_HWInterface * hw)
{
}
/* send a ARP new IP notification */
int
sgIP_ARP_SendGratARP (sgIP_Hub_HWInterface * hw)
{
return 0;
}
/* ----------------- unused things ------------------------ */
sgIP_DNS_Record *
sgIP_DNS_GetUnusedRecord (void)
{
static sgIP_DNS_Record rec;
return &rec; /* we must return a valid record even if not used */
}
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