nes-proj/os/services/ip64/ip64-eth-interface.c

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/*
* Copyright (c) 2012, Thingsquare, http://www.thingsquare.com/.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
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*
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
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#include "net/ipv6/uip.h"
#include "net/ipv6/uip-ds6.h"
#include "dev/slip.h"
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#include "ip64/ip64.h"
#include "ip64/ip64-arp.h"
#include "ip64/ip64-eth-interface.h"
#include <string.h>
#define DEBUG DEBUG_NONE
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#include "net/ipv6/uip-debug.h"
#define printf(...)
/*---------------------------------------------------------------------------*/
void
ip64_eth_interface_input(uint8_t *packet, uint16_t len)
{
struct ip64_eth_hdr *ethhdr;
ethhdr = (struct ip64_eth_hdr *)packet;
if(ethhdr->type == UIP_HTONS(IP64_ETH_TYPE_ARP)) {
len = ip64_arp_arp_input(packet, len);
if(len > 0) {
IP64_ETH_DRIVER.output(packet, len);
}
} else if(ethhdr->type == UIP_HTONS(IP64_ETH_TYPE_IP) &&
len > sizeof(struct ip64_eth_hdr)) {
printf("-------------->\n");
uip_len = ip64_4to6(&packet[sizeof(struct ip64_eth_hdr)],
len - sizeof(struct ip64_eth_hdr),
&uip_buf[UIP_LLH_LEN]);
if(uip_len > 0) {
printf("ip64_interface_process: converted %d bytes\n", uip_len);
printf("ip64-interface: input source ");
PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
PRINTF(" destination ");
PRINT6ADDR(&UIP_IP_BUF->destipaddr);
PRINTF("\n");
tcpip_input();
printf("Done\n");
}
}
}
/*---------------------------------------------------------------------------*/
static void
init(void)
{
printf("ip64-eth-interface: init\n");
}
/*---------------------------------------------------------------------------*/
static int
output(void)
{
int len, ret;
printf("ip64-interface: output source ");
PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
PRINTF(" destination ");
PRINT6ADDR(&UIP_IP_BUF->destipaddr);
PRINTF("\n");
printf("<--------------\n");
len = ip64_6to4(&uip_buf[UIP_LLH_LEN], uip_len,
&ip64_packet_buffer[sizeof(struct ip64_eth_hdr)]);
printf("ip64-interface: output len %d\n", len);
if(len > 0) {
if(ip64_arp_check_cache(&ip64_packet_buffer[sizeof(struct ip64_eth_hdr)])) {
printf("Create header\n");
ret = ip64_arp_create_ethhdr(ip64_packet_buffer,
&ip64_packet_buffer[sizeof(struct ip64_eth_hdr)]);
if(ret > 0) {
len += ret;
IP64_ETH_DRIVER.output(ip64_packet_buffer, len);
}
} else {
printf("Create request\n");
len = ip64_arp_create_arp_request(ip64_packet_buffer,
&ip64_packet_buffer[sizeof(struct ip64_eth_hdr)]);
return IP64_ETH_DRIVER.output(ip64_packet_buffer, len);
}
}
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return 0;
}
/*---------------------------------------------------------------------------*/
const struct uip_fallback_interface ip64_eth_interface = {
init,
output
};
/*---------------------------------------------------------------------------*/