Tweak MSS up.

[netwatch.git] / net / net.c

#include <pci.h>
#include <smram.h>
#include <pci-bother.h>
#include <output.h>
#include <minilib.h>
#include <lwip/init.h>
#include "net.h"

#include "lwip/opt.h"
#include "lwip/def.h"
#include "lwip/mem.h"
#include "lwip/pbuf.h"
#include "lwip/sys.h"
#include <lwip/stats.h>
#include <lwip/snmp.h>
#include <lwip/dhcp.h>
#include <lwip/tcp.h>
#include "netif/etharp.h"
#include "netif/ppp_oe.h"

static struct nic *_nic = 0x0;
static struct netif _netif;

extern struct pci_driver a3c90x_driver;

void eth_poll()
{
	unsigned char pkt[1600];
	int len;
	struct pbuf *p, *q;
	struct eth_hdr *ethhdr;
	int pos = 0;
	static int ticks = 0;
	
	if (!_nic)
		return;
	
	smram_tseg_set_state(SMRAM_TSEG_OPEN);
	
	if ((ticks % 1000) == 0)	/* About a minute */
		dhcp_coarse_tmr();
	if ((ticks % 8) == 0)	/* About 500msec*/
		dhcp_fine_tmr();
	if ((ticks % 4) == 0)	/* About 250msec*/
		tcp_tmr();
	ticks++;

	if (_nic->poll(_nic, 0))
	{
		_nic->packet = pkt;
		_nic->poll(_nic, 1);
		
		len = _nic->packetlen;
		
		outputf("NIC: Packet: %d bytes", len);
			
		p = pbuf_alloc(PBUF_RAW, len, PBUF_POOL);
		if (p == NULL)
		{
			outputf("NIC: out of memory for packet?");
			LINK_STATS_INC(link.memerr);
			LINK_STATS_INC(link.drop);
			return;
		}
	
		for(q = p; q != NULL; q = q->next)
		{
			memcpy(q->payload, pkt+pos, q->len);
			pos += q->len;
		}
		
		LINK_STATS_INC(link.recv);
		
		ethhdr = p->payload;
		
		switch (htons(ethhdr->type)) {
		case ETHTYPE_IP:
		case ETHTYPE_ARP:
			if (_netif.input(p, &_netif) != ERR_OK)
			{
				LWIP_DEBUGF(NETIF_DEBUG, ("netdev_input: IP input error\n"));
				pbuf_free(p);
			}
			break;
			
		default:
			outputf("Unhandled packet type %04x input", ethhdr->type);
			pbuf_free(p);
			break;
		}
	}
}

static err_t _transmit(struct netif *netif, struct pbuf *p)
{
	struct nic *nic = netif->state;
	struct pbuf *q;
	unsigned char pkt[1600];
	unsigned int len = 0;

	for(q = p; q != NULL; q = q->next)
	{
		memcpy(pkt + len, q->payload, q->len);
		len += q->len;
	}

	outputf("NIC: Transmit packet: %d bytes", len);

	nic->transmit(len, pkt);

	LINK_STATS_INC(link.xmit);

	return ERR_OK;
}

static err_t _init(struct netif *netif)
{
	struct nic *nic = netif->state;
	
	LWIP_ASSERT("netif != NULL", (netif != NULL));
		
#if LWIP_NETIF_HOSTNAME
	netif->hostname = "netwatch";
#endif
	
	NETIF_INIT_SNMP(netif, snmp_ifType_ethernet_csmacd, 100000000);

	netif->name[0] = 'e';
	netif->name[1] = 'n';
	netif->output = etharp_output;
	netif->linkoutput = _transmit;
	
	memcpy(netif->hwaddr, nic->hwaddr, 6);
	netif->mtu = 1500;
	netif->hwaddr_len = ETHARP_HWADDR_LEN;
	netif->flags = NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP | NETIF_FLAG_LINK_UP;
	
	return ERR_OK;
}

int eth_register(struct nic *nic)
{
	static struct ip_addr ipa = { 0 } , netmask = { 0 } , gw = { 0 };
	
	if (_nic)
		return -1;
	netif_add(&_netif, &ipa, &netmask, &gw, (void*)nic, _init, ethernet_input);
	netif_set_default(&_netif);
	netif_set_up(&_netif);
	dhcp_start(&_netif);
	_nic = nic;
	return 0;
}

void eth_init()
{
	extern void httpd_init();
	
	/* Required for DMA to work. :( */
	smram_tseg_set_state(SMRAM_TSEG_OPEN);
	lwip_init();
	pci_probe_driver(a3c90x_driver);
	httpd_init();
}