//
// ecosif_input():
// This function is called when the eCos hw independent driver
// has some data to pass up to lwIP.It does it through ecosif_input.
//
static void
ecosif_input(struct netif *netif, struct pbuf *p)
{
struct eth_hdr *ethhdr;
ethhdr = p->payload;
switch (htons(ethhdr->type)) {
case ETHTYPE_IP:
LWIP_DEBUGF(0, ("ecosif_input: IP packet\n"));
etharp_ip_input(netif, p);
pbuf_header(p, -14);
netif->input(p, netif);
break;
case ETHTYPE_ARP:
LWIP_DEBUGF(0, ("ecosif_input: ARP packet\n"));
etharp_arp_input(netif, (struct eth_addr *) &netif->hwaddr, p);
break;
default:
pbuf_free(p);
break;
}
}
void
jif_input(struct netif *netif, void *va)
{
struct jif *jif;
struct eth_hdr *ethhdr;
struct pbuf *p;
jif = netif->state;
/* move received packet into a new pbuf */
p = low_level_input(va);
/* no packet could be read, silently ignore this */
if (p == NULL) return;
/* points to packet payload, which starts with an Ethernet header */
ethhdr = p->payload;
switch (htons(ethhdr->type)) {
case ETHTYPE_IP:
/* update ARP table */
etharp_ip_input(netif, p);
/* skip Ethernet header */
pbuf_header(p, -(int)sizeof(struct eth_hdr));
/* pass to network layer */
netif->input(p, netif);
break;
case ETHTYPE_ARP:
/* pass p to ARP module */
etharp_arp_input(netif, jif->ethaddr, p);
break;
default:
pbuf_free(p);
}
}
/*
* ethernetif_input(): This function should be called when a packet is ready to
* be read from the interface. It uses the function low_level_input() that
* should handle the actual reception of bytes from the network interface.
*/
static void ethernetif_input( void * pvParameters )
{
struct ethernetif *ethernetif;
struct eth_hdr *ethhdr;
struct pbuf *p;
( void ) pvParameters;
for( ;; )
{
do
{
ethernetif = xNetIf->state;
/* move received packet into a new pbuf */
p = low_level_input( xNetIf );
if( p == NULL )
{
/* No packet could be read. Wait a for an interrupt to tell us
there is more data available. */
vEMACWaitForInput();
}
} while( p == NULL );
/* points to packet payload, which starts with an Ethernet header */
ethhdr = p->payload;
#if LINK_STATS
lwip_stats.link.recv++;
#endif /* LINK_STATS */
ethhdr = p->payload;
switch( htons( ethhdr->type ) )
{
/* IP packet? */
case ETHTYPE_IP:
/* update ARP table */
etharp_ip_input( xNetIf, p );
/* skip Ethernet header */
pbuf_header( p, (s16_t)-sizeof(struct eth_hdr) );
/* pass to network layer */
xNetIf->input( p, xNetIf );
break;
case ETHTYPE_ARP:
/* pass p to ARP module */
etharp_arp_input( xNetIf, ethernetif->ethaddr, p );
break;
default:
pbuf_free( p );
p = NULL;
break;
}
}
}
static void
netfront_input(struct netif *netif, unsigned char* data, int len)
{
struct eth_hdr *ethhdr;
struct pbuf *p, *q;
#if ETH_PAD_SIZE
len += ETH_PAD_SIZE; /* allow room for Ethernet padding */
#endif
/* move received packet into a new pbuf */
p = pbuf_alloc(PBUF_RAW, len, PBUF_POOL);
if (p == NULL) {
LINK_STATS_INC(link.memerr);
LINK_STATS_INC(link.drop);
return;
}
#if ETH_PAD_SIZE
pbuf_header(p, -ETH_PAD_SIZE); /* drop the padding word */
#endif
/* We iterate over the pbuf chain until we have read the entire
* packet into the pbuf. */
for(q = p; q != NULL && len > 0; q = q->next) {
/* Read enough bytes to fill this pbuf in the chain. The
* available data in the pbuf is given by the q->len
* variable. */
memcpy(q->payload, data, len < q->len ? len : q->len);
data += q->len;
len -= q->len;
}
#if ETH_PAD_SIZE
pbuf_header(p, ETH_PAD_SIZE); /* reclaim the padding word */
#endif
LINK_STATS_INC(link.recv);
/* points to packet payload, which starts with an Ethernet header */
ethhdr = p->payload;
ethhdr = p->payload;
switch (htons(ethhdr->type)) {
/* IP packet? */
case ETHTYPE_IP:
#if 0
/* CSi disabled ARP table update on ingress IP packets.
This seems to work but needs thorough testing. */
/* update ARP table */
etharp_ip_input(netif, p);
#endif
/* skip Ethernet header */
pbuf_header(p, -(int16_t)sizeof(struct eth_hdr));
/* pass to network layer */
if (tcpip_input(p, netif) == ERR_MEM)
/* Could not store it, drop */
pbuf_free(p);
break;
case ETHTYPE_ARP:
/* pass p to ARP module */
etharp_arp_input(netif, (struct eth_addr *) netif->hwaddr, p);
break;
default:
pbuf_free(p);
p = NULL;
break;
}
}
static void paulosif_input (struct netif *netif)
{
struct genericif *genericif;
struct eth_hdr *ethhdr;
struct pbuf *p, *q = NULL, *r = NULL;
int len;
u16_t ether_type;
genericif = netif->state;
ioctl (genericif->fd, FIONREAD, &len);
if (len <= 0)
return;
p = low_level_input (genericif);
if (!p) {
DEBUGF (TAPIF_DEBUG, ("paulosif_input: low_level_input returned NULL\n"));
return;
}
ethhdr = p->payload;
ether_type = ntohs (ethhdr->type);
if (pppoe_input_callback && (ether_type == 0x8863 || ether_type == 0x8864)) {
//printf ("paulosif_input: got PPPoE packet, %d bytes\n", (int) p->len);
(*pppoe_input_callback) (pppoe_user_data, p, ether_type);
pbuf_free (p);
return;
}
if (packet_validate (p, netif, genericif)) {
pbuf_free (p);
return;
}
if (packet_filter_callback) {
if ((*packet_filter_callback) (packet_filter_data, (unsigned char *) p->payload, (int) p->len)) {
pbuf_free (p);
return;
}
}
switch (ether_type) {
case ETHTYPE_IP:
DEBUGF (TAPIF_DEBUG, ("paulosif_input: IP packet\n"));
q = etharp_ip_input (netif, p);
pbuf_header (p, -14);
netif->input (p, netif); /* segfault */
break;
case ETHTYPE_ARP:
DEBUGF (TAPIF_DEBUG, ("paulosif_input: ARP packet\n"));
q = etharp_arp_input (netif, genericif->ethaddr, p, &r);
pbuf_free (p);
break;
default:
pbuf_free (p);
break;
}
if (q != NULL) {
magic (q, PBUF_MAGIC);
low_level_output (genericif, q);
pbuf_free (q); /* free'd */
}
if (r != NULL) {
magic (r, PBUF_MAGIC);
low_level_output (genericif, r);
pbuf_free (r); /* free'd */
}
}
/**
* Process received ethernet frames. Using this function instead of directly
* calling ip_input and passing ARP frames through etharp in ethernetif_input,
* the ARP cache is protected from concurrent access.
*
* @param p the recevied packet, p->payload pointing to the ethernet header
* @param netif the network interface on which the packet was received
*/
err_t ethernet_input(struct pbuf *p, struct netif *netif) {
struct eth_hdr* ethhdr;
u16_t type;
/* points to packet payload, which starts with an Ethernet header */
ethhdr = p->payload;
LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("ethernet_input: dest:%02x:%02x:%02x:%02x:%02x:%02x, src:%02x:%02x:%02x:%02x:%02x:%02x, type:%2x"NEWLINE, (unsigned )ethhdr->dest.addr[0], (unsigned )ethhdr->dest.addr[1], (unsigned )ethhdr->dest.addr[2], (unsigned )ethhdr->dest.addr[3], (unsigned )ethhdr->dest.addr[4], (unsigned )ethhdr->dest.addr[5], (unsigned )ethhdr->src.addr[0], (unsigned )ethhdr->src.addr[1], (unsigned )ethhdr->src.addr[2], (unsigned )ethhdr->src.addr[3], (unsigned )ethhdr->src.addr[4], (unsigned )ethhdr->src.addr[5], (unsigned )htons(ethhdr->type)));
netif->rxpackets++;
netif->rxbytes += p->tot_len;
type = htons(ethhdr->type);
#if ETHARP_SUPPORT_VLAN
if (type == ETHTYPE_VLAN) {
struct eth_vlan_hdr *vlan = (struct eth_vlan_hdr*)(((char*)ethhdr) + SIZEOF_ETH_HDR);
#ifdef ETHARP_VLAN_CHECK /* if not, allow all VLANs */
if (VLAN_ID(vlan) != ETHARP_VLAN_CHECK) {
/* silently ignore this packet: not for our VLAN */
pbuf_free(p);
return ERR_OK;
}
#endif /* ETHARP_VLAN_CHECK */
type = htons(vlan->tpid);
}
#endif /* ETHARP_SUPPORT_VLAN */
//acquireMutex(comStackMutex);
switch (type) {
/* IP packet? */
case ETHTYPE_IPV4:
#if ETHARP_TRUST_IP_MAC
/* update ARP table */
ethar_ip_input(netif, p);
#endif /* ETHARP_TRUST_IP_MAC */
/* skip Ethernet header */
if (pbuf_header(p, -(s16_t) SIZEOF_ETH_HDR)) {
LWIP_ASSERT("Can't move over header in packet", 0);
pbuf_free(p);
p = NULL;
} else {
/* pass to IP layer */
ip4_input(p, netif);
}
break;
case ETHTYPE_IPV6:
#if ETHARP_TRUST_IP_MAC
/* update AR table */
ethar_ip_input(netif, p);
#endif /* ETHARP_TRUST_IP_MAC */
if (pbuf_header(p, -(s16_t) SIZEOF_ETH_HDR)) {
LWIP_ASSERT("Can't move over header in packet", 0);
pbuf_free(p);
p = NULL;
} else {
ip6_input(p, netif);
}
break;
#if LWIP_ARP
case ETHTYPE_ARP:
/* pass p to ARP module */
etharp_arp_input(netif, (struct eth_addr*) (netif->hwaddr), p);
break;
#endif
#if PPPOE_SUPPORT
case ETHTYPE_PPPOEDISC: /* PPP Over Ethernet Discovery Stage */
pppoe_disc_input(netif, p);
break;
case ETHTYPE_PPPOE: /* PPP Over Ethernet Session Stage */
pppoe_data_input(netif, p);
break;
#endif /* PPPOE_SUPPORT */
default:
ETHARP_STATS_INC(etharp.proterr);
ETHARP_STATS_INC(etharp.drop);
pbuf_free(p);
break;
}
//releaseMutex(comStackMutex);
/* This means the pbuf is freed or consumed,
so the caller doesn't have to free it again */
return (ERR_OK);
}
/**
* This function should be called when a packet is ready to be read
* from the interface. It uses the function low_level_input() that
* should handle the actual reception of bytes from the network
* interface. Then the type of the received packet is determined and
* the appropriate input function is called.
*
* @param netif the lwip network interface structure for this ethernetif
*/
static void ethernetif_input( void * pvParameters )
{
struct ethernetif *ethernetif;
struct eth_hdr *ethhdr;
struct pbuf *p;
for( ;; )
{
do
{
ethernetif = s_pxNetIf->state;
/* move received packet into a new pbuf */
p = low_level_input( s_pxNetIf );
if( p == NULL )
{
/* No packet could be read. Wait a for an interrupt to tell us
there is more data available. */
vEMACWaitForInput();
}
} while( p == NULL );
/* points to packet payload, which starts with an Ethernet header */
ethhdr = p->payload;
#if LINK_STATS
lwip_stats.link.recv++;
#endif /* LINK_STATS */
ethhdr = p->payload;
switch (htons(ethhdr->type))
{
/* IP packet? */
case ETHTYPE_IP:
/* full packet send to tcpip_thread to process */
if (s_pxNetIf->input(p, s_pxNetIf) != ERR_OK)
{
LWIP_DEBUGF(NETIF_DEBUG, ("ethernetif_input: IP input error\n"));
pbuf_free(p);
p = NULL;
}
break;
case ETHTYPE_ARP:
#if ETHARP_TRUST_IP_MAC
etharp_ip_input(s_pxNetIf, p);
#endif
/* pass p to ARP module */
etharp_arp_input(s_pxNetIf, ethernetif->ethaddr, p);
break;
default:
pbuf_free(p);
p = NULL;
break;
}
}
}