/************************************************************************
* NAME: fnet_raw_input
*
* DESCRIPTION: RAW input function.
*************************************************************************/
void fnet_raw_input(fnet_netif_t *netif, struct sockaddr *foreign_addr, struct sockaddr *local_addr, fnet_netbuf_t *nb, fnet_netbuf_t *ip_nb)
{
fnet_socket_t *sock;
fnet_socket_t *last;
fnet_netbuf_t *nb_tmp;
int protocol_number;
if(netif && nb && nb->total_length)
{
#if FNET_CFG_IP4
if(foreign_addr->sa_family == AF_INET)
{
protocol_number = ((fnet_ip_header_t *)(ip_nb->data_ptr))->protocol;
}
else
#endif
#if FNET_CFG_IP6
if(foreign_addr->sa_family == AF_INET6)
{
protocol_number = ((fnet_ip6_header_t *)(ip_nb->data_ptr))->next_header;
}
else
#endif
{protocol_number = 0;}
/* Demultiplex broadcast & multicast datagrams.*/
if(fnet_socket_addr_is_broadcast(local_addr, netif) || fnet_socket_addr_is_multicast(local_addr))
{
last = 0;
for (sock = fnet_raw_prot_if.head; sock != 0; sock = sock->next)
{
/* Ignore local port number.*/
/* Check protocol number.*/
if(sock->protocol_number != protocol_number)
continue; /* => ignore.*/
#if FNET_CFG_MULTICAST
if(fnet_socket_addr_is_multicast(local_addr))
{
int m;
int for_us = FNET_FALSE;
#if FNET_CFG_IP4
if(local_addr->sa_family == AF_INET)
{
for(m=0; m < FNET_CFG_MULTICAST_SOCKET_MAX; m++)
{
if(sock->ip4_multicast_entry[m])
{
if((sock->ip4_multicast_entry[m]->group_addr == ((struct sockaddr_in *)(local_addr))->sin_addr.s_addr) && (sock->ip4_multicast_entry[m]->netif == netif ))
for_us = FNET_TRUE;
}
}
}
#endif
#if FNET_CFG_IP6
if(local_addr->sa_family == AF_INET6)
{
for(m=0; m < FNET_CFG_MULTICAST_SOCKET_MAX; m++)
{
if(sock->ip6_multicast_entry[m])
{
if(FNET_IP6_ADDR_EQUAL(&sock->ip6_multicast_entry[m]->group_addr, &((struct sockaddr_in6 *)(local_addr))->sin6_addr.s6_addr) && (sock->ip6_multicast_entry[m]->netif == netif))
for_us = FNET_TRUE;
}
}
}
#endif
if(for_us == FNET_FALSE)
continue;
}
else
#endif /* FNET_CFG_MULTICAST */
{
/* Compare local address.*/
if(!fnet_socket_addr_is_unspecified(&sock->local_addr))
{
if(!fnet_socket_addr_are_equal(&sock->local_addr, local_addr))
continue;
}
/* Compare foreign address and port number.*/
if(!fnet_socket_addr_is_unspecified(&sock->foreign_addr))
{
if((!fnet_socket_addr_are_equal(&sock->foreign_addr, foreign_addr)) )
continue;
}
}
if((last != 0) && (last->receive_buffer.is_shutdown == 0))
{
if((nb_tmp = fnet_netbuf_copy(nb, 0, FNET_NETBUF_COPYALL, 0)) != 0)
{
if(fnet_socket_buffer_append_address(&(last->receive_buffer), nb_tmp, foreign_addr) == FNET_ERR)
{
fnet_netbuf_free_chain(nb_tmp);
}
}
}
last = sock;
}
if(last == 0)
goto BAD;
if(last->receive_buffer.is_shutdown) /* Is shutdown.*/
goto BAD;
/* Copy buffer.*/
if((nb_tmp = fnet_netbuf_copy(nb, 0, FNET_NETBUF_COPYALL, 0)) != 0)
{
if(fnet_socket_buffer_append_address(&(last->receive_buffer), nb_tmp, foreign_addr) == FNET_ERR)
{
fnet_netbuf_free_chain(nb_tmp);
goto BAD;
}
}
else
goto BAD;
}
else /* For unicast datagram.*/
{
sock = fnet_socket_lookup(fnet_raw_prot_if.head, local_addr, foreign_addr, protocol_number);
if(sock)
{
if(sock->receive_buffer.is_shutdown) /* Is shutdown.*/
goto BAD;
/* Copy buffer.*/
if((nb_tmp = fnet_netbuf_copy(nb, 0, FNET_NETBUF_COPYALL, 0)) != 0)
{
if(fnet_socket_buffer_append_address(&(sock->receive_buffer), nb_tmp, foreign_addr) == FNET_ERR)
{
fnet_netbuf_free_chain(nb_tmp);
goto BAD;
}
}
else
goto BAD;
}
}
}
BAD:
return;
}
/************************************************************************
* NAME: fnet_udp_input
*
* DESCRIPTION: UDP input function.
*************************************************************************/
static void fnet_udp_input(fnet_netif_t *netif, struct sockaddr *foreign_addr, struct sockaddr *local_addr, fnet_netbuf_t *nb, fnet_netbuf_t *ip_nb)
{
fnet_udp_header_t *udp_header = (fnet_udp_header_t *)nb->data_ptr;
fnet_socket_if_t *sock;
fnet_socket_if_t *last;
fnet_size_t udp_length;
fnet_netbuf_t *nb_tmp;
if((netif != 0) && (nb != 0))
{
/* The header must reside in contiguous area of memory.*/
if(fnet_netbuf_pullup(&nb, sizeof(fnet_udp_header_t)) == FNET_ERR)
{
goto BAD;
}
udp_length = fnet_ntohs(udp_header->length);
if(nb->total_length >= udp_length) /* Check the amount of data.*/
{
if(nb->total_length > udp_length)
{
/* Logical size and the physical size of the packet should be the same.*/
fnet_netbuf_trim(&nb, (fnet_int32_t)(udp_length - nb->total_length));
}
#if FNET_CFG_UDP_CHECKSUM
if((udp_header->checksum != 0u)
#if FNET_CFG_CPU_ETH_HW_RX_PROTOCOL_CHECKSUM || FNET_CFG_CPU_ETH_HW_TX_PROTOCOL_CHECKSUM
&& ((nb->flags & FNET_NETBUF_FLAG_HW_PROTOCOL_CHECKSUM) == 0)
#endif
)
{
fnet_uint16_t sum;
sum = fnet_checksum_pseudo_start( nb, FNET_HTONS((fnet_uint16_t)FNET_IP_PROTOCOL_UDP), (fnet_uint16_t)udp_length );
sum = fnet_checksum_pseudo_end( sum, &foreign_addr->sa_data[0], &local_addr->sa_data[0],
(fnet_size_t)((local_addr->sa_family == AF_INET) ? sizeof(fnet_ip4_addr_t) : sizeof(fnet_ip6_addr_t)));
if(sum)
{
goto BAD;
}
}
#endif
fnet_udp_trace("RX", udp_header); /* Trace UDP header.*/
local_addr->sa_port = udp_header->destination_port;
foreign_addr->sa_port = udp_header->source_port;
fnet_netbuf_trim(&nb, (fnet_int32_t)sizeof(fnet_udp_header_t));
/* Demultiplex broadcast & multicast datagrams.*/
if((fnet_socket_addr_is_broadcast(local_addr, netif)) || (fnet_socket_addr_is_multicast(local_addr)))
{
last = 0;
for (sock = fnet_udp_prot_if.head; sock != 0; sock = sock->next)
{
/* Compare local port number.*/
if(sock->local_addr.sa_port != local_addr->sa_port)
{
continue; /* => ignore.*/
}
#if FNET_CFG_MULTICAST
if(fnet_socket_addr_is_multicast(local_addr))
{
fnet_index_t m;
fnet_bool_t for_us = FNET_FALSE;
#if FNET_CFG_IP4
if(local_addr->sa_family == AF_INET)
{
for(m = 0u; m < FNET_CFG_MULTICAST_SOCKET_MAX; m++)
{
if(sock->ip4_multicast_entry[m])
{
if((sock->ip4_multicast_entry[m]->group_addr == ((struct sockaddr_in *)(local_addr))->sin_addr.s_addr) && (sock->ip4_multicast_entry[m]->netif == netif ))
{
for_us = FNET_TRUE;
}
}
}
}
else
#endif
#if FNET_CFG_IP6
if(local_addr->sa_family == AF_INET6)
{
for(m=0u; m < FNET_CFG_MULTICAST_SOCKET_MAX; m++)
{
if(sock->ip6_multicast_entry[m])
{
if(FNET_IP6_ADDR_EQUAL(&sock->ip6_multicast_entry[m]->group_addr, &((struct sockaddr_in6 *)(local_addr))->sin6_addr.s6_addr) && (sock->ip6_multicast_entry[m]->netif == netif))
{
for_us = FNET_TRUE;
}
}
}
}
else
#endif
{}
if(for_us == FNET_FALSE)
{
continue;
}
}
else
#endif /* FNET_CFG_MULTICAST */
{
/* Compare local address.*/
if(!fnet_socket_addr_is_unspecified(&sock->local_addr))
{
if(!fnet_socket_addr_are_equal(&sock->local_addr, local_addr))
{
continue;
}
}
/* Compare foreign address and port number.*/
if(!fnet_socket_addr_is_unspecified(&sock->foreign_addr))
{
if((!fnet_socket_addr_are_equal(&sock->foreign_addr, foreign_addr)) || (sock->foreign_addr.sa_port != foreign_addr->sa_port))
{
continue;
}
}
}
if((last != 0) && (last->receive_buffer.is_shutdown == FNET_FALSE))
{
if((nb_tmp = fnet_netbuf_copy(nb, 0u, FNET_NETBUF_COPYALL, FNET_FALSE)) != 0)
{
if(fnet_socket_buffer_append_address(&(last->receive_buffer), nb_tmp, foreign_addr) == FNET_ERR)
{
fnet_netbuf_free_chain(nb_tmp);
}
}
}
last = sock;
}
if(last == 0)
{
goto BAD;
}
if(last->receive_buffer.is_shutdown) /* Is shutdown.*/
{
goto BAD;
}
if(fnet_socket_buffer_append_address(&(last->receive_buffer), nb, foreign_addr) == FNET_ERR)
{
goto BAD;
}
fnet_netbuf_free_chain(ip_nb);
}
else /* For unicast datagram.*/
{
sock = fnet_socket_lookup(fnet_udp_prot_if.head, local_addr, foreign_addr, FNET_IP_PROTOCOL_UDP);
if(sock)
{
if(sock->receive_buffer.is_shutdown) /* Is shutdown.*/
{
goto BAD;
}
if(fnet_socket_buffer_append_address(&(sock->receive_buffer), nb, foreign_addr) == FNET_ERR)
{
goto BAD;
}
fnet_netbuf_free_chain(ip_nb);
}
else
{
fnet_netbuf_free_chain(nb); /* No match was found, send ICMP destination port unreachable.*/
#if FNET_CFG_IP4
if(local_addr->sa_family == AF_INET)
{
fnet_icmp_error(netif, FNET_ICMP_UNREACHABLE, FNET_ICMP_UNREACHABLE_PORT, ip_nb);
}else
#endif
#if FNET_CFG_IP6
if(local_addr->sa_family == AF_INET6)
{
fnet_icmp6_error(netif, FNET_ICMP6_TYPE_DEST_UNREACH, FNET_ICMP6_CODE_DU_PORT_UNREACH, 0u, ip_nb );
}else
#endif
{}
}
}
}
else
{
goto BAD;
}
}
else
{
BAD:
fnet_netbuf_free_chain(ip_nb);
fnet_netbuf_free_chain(nb);
}
}