static int
arp_is_reply(struct sk_buff *skb)
{
struct arphdr *arp = arp_hdr(skb);
if (!arp)
{
HNAT_PRINTK("%s: Packet has no ARP data\n", __func__);
return 0;
}
if (skb->len < sizeof(struct arphdr))
{
HNAT_PRINTK("%s: Packet is too small to be an ARP\n", __func__);
return 0;
}
if (arp->ar_op != htons(ARPOP_REPLY))
{
return 0;
}
return 1;
}
static void
nat_ipt_del(struct ipt_replace ireplace)
{
int i, j;
struct ipt_entry *gentry = NULL;
struct ipt_entry *sentry = NULL;
struct xt_entry_target *gtarget = NULL;
struct xt_entry_target *starget = NULL;
struct nf_nat_ipv4_multi_range_compat *grange = NULL;
struct nf_nat_ipv4_multi_range_compat *srange = NULL;
uint8_t *gptr, *sptr;
gptr = gbuffer;
sptr = sbuffer;
unsigned int oldnum = ireplace.num_counters;
unsigned int seq = 1;
HNAT_PRINTK("into nat_ipt_del\n");
for (i = oldnum; i >= 0; i--)//NF_NAT_INIT_ENTRIES_NUM; i--)
{
gentry = (struct ipt_entry *)gptr;
sentry = (struct ipt_entry *)sptr;
gtarget = (struct xt_entry_target *)((uint8_t *) gentry + gentry->target_offset);
starget = (struct xt_entry_target *)((uint8_t *) sentry + sentry->target_offset);
grange = (struct nf_nat_ipv4_multi_range_compat *)((uint8_t *) gtarget + sizeof (*gtarget));
srange = (struct nf_nat_ipv4_multi_range_compat *)((uint8_t *) starget + sizeof (*starget));
HNAT_PRINTK("(%d)isis_nat_del name %s:%s#####(%x:%x %x)###\n",
i, gtarget->u.user.name, starget->u.user.name,
gentry->ip.src.s_addr, gentry->ip.dst.s_addr,
grange->range[0].min.all);
if (strcmp(gtarget->u.user.name, starget->u.user.name))
{
/*if (!strcmp(gtarget->u.user.name, "DNAT")) {
if (gentry->ip.src.s_addr || !gentry->ip.dst.s_addr
|| grange->range[0].min.all)
return;
goto delete;
} else */
if (!strcmp(gtarget->u.user.name, "SNAT"))
{
if (!gentry->ip.src.s_addr || gentry->ip.dst.s_addr
|| grange->range[0].min.all)
return;
goto delete;
}
return;
} /*else if (!strcmp(gtarget->u.user.name, "DNAT")) {
if (memcmp(gentry, sentry, gentry->next_offset)) {
if (gentry->ip.src.s_addr || !gentry->ip.dst.s_addr
|| grange->range[0].min.all)
return;
goto delete;
}
} */else if (!strcmp(gtarget->u.user.name, "SNAT"))
{
if (memcmp(gentry, sentry, gentry->next_offset))
{
if (!gentry->ip.src.s_addr || gentry->ip.dst.s_addr
|| grange->range[0].min.all)
return;
goto delete;
}
}
gptr += gentry->next_offset;
sptr += gentry->next_offset;
if(!strcmp(gtarget->u.user.name, "SNAT"))
{
seq++;
}
}
static sw_error_t setup_interface_entry(char *list_if, int is_wan)
{
char temp[IFNAMSIZ*4]; /* Max 4 interface entries right now. */
char *dev_name, *list_all;
struct net_device *nat_dev;
struct in_device *in_device_lan = NULL;
uint8_t *devmac, if_mac_addr[MAC_LEN];
char *br_name;
uint32_t vid = 0;
sw_error_t setup_error;
uint32_t ipv6 = 0;
memcpy(temp, list_if, strlen(list_if)+1);
list_all = temp;
setup_error = SW_OK;
while ((dev_name = strsep(&list_all, " ")) != NULL)
{
nat_dev = dev_get_by_name(&init_net, dev_name);
if (NULL == nat_dev)
{
// printk("%s: Cannot get device %s by name!\n", __FUNCTION__, dev_name);
setup_error = SW_FAIL;
continue;
}
#if defined (CONFIG_BRIDGE)
if (NULL != nat_dev->br_port) /* under bridge interface. */
{
/* Get bridge interface name */
br_name = (char *)nat_dev->br_port->br->dev->name;
memcpy (nat_bridge_dev, br_name, sizeof(br_name));
/* Get dmac */
devmac = (uint8_t *)nat_dev->br_port->br->dev->dev_addr;
}
else
#endif /* CONFIG_BRIDGE */
{
devmac = (uint8_t *)nat_dev->dev_addr;
}
/* get vid */
#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
vid = vlan_dev_vlan_id(nat_dev);
#else
vid = 0;
#endif
#ifdef CONFIG_IPV6_HWACCEL
ipv6 = 1;
if (is_wan)
{
wan_fid = vid;
}
#else
ipv6 = 0;
if (is_wan)
{
if (NF_S17_WAN_TYPE_PPPOEV6 == nf_athrs17_hnat_wan_type)
ipv6 = 1;
wan_fid = vid;
}
#endif
#ifdef ISISC
if (0 == is_wan) /* Not WAN -> LAN */
{ /* Setup private and netmask as soon as possible */
in_device_lan = (struct in_device *) nat_dev->ip_ptr;
nat_hw_prv_mask_set((a_uint32_t)(in_device_lan->ifa_list->ifa_mask));
nat_hw_prv_base_set((a_uint32_t)(in_device_lan->ifa_list->ifa_address));
}
#endif
memcpy(if_mac_addr, devmac, MAC_LEN);
devmac = if_mac_addr;
dev_put(nat_dev);
HNAT_PRINTK("DMAC: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
devmac[0], devmac[1], devmac[2],
devmac[3], devmac[4], devmac[5]);
HNAT_PRINTK("VLAN id: %d\n", vid);
if(if_mac_add(devmac, vid, ipv6) != 0)
{
setup_error = SW_FAIL;
continue;
}
else
{
setup_error = SW_OK;
}
}
return setup_error;
}
