int __ip_local_out(struct sk_buff *skb)
{
struct iphdr *iph = ip_hdr(skb);
#if defined(CONFIG_RA_HW_NAT) || defined(CONFIG_RA_HW_NAT_MODULE)
FOE_AI_UNHIT(skb);
#endif
iph->tot_len = htons(skb->len);
ip_send_check(iph);
return nf_hook(NFPROTO_IPV4, NF_INET_LOCAL_OUT, skb, NULL,
skb_dst(skb)->dev, dst_output);
}
int __ip6_local_out(struct sk_buff *skb)
{
int len;
len = skb->len - sizeof(struct ipv6hdr);
if (len > IPV6_MAXPLEN)
len = 0;
ipv6_hdr(skb)->payload_len = htons(len);
IP6CB(skb)->nhoff = offsetof(struct ipv6hdr, nexthdr);
#if defined(CONFIG_RA_HW_NAT) || defined(CONFIG_RA_HW_NAT_MODULE)
#if defined(CONFIG_RA_HW_NAT_IPV6)
FOE_AI_UNHIT(skb);
#endif
#endif
return nf_hook(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL,
skb_dst(skb)->dev, dst_output);
}
int __ip_local_out(struct sk_buff *skb)
{
struct iphdr *iph = ip_hdr(skb);
#if IS_ENABLED(CONFIG_RA_HW_NAT)
FOE_AI_UNHIT(skb);
#endif
iph->tot_len = htons(skb->len);
ip_send_check(iph);
#if defined(CONFIG_NETFILTER_FP_SMB)
if ((skb->nf_fp_cache & NF_FP_CACHE_SMB) || nf_fp_smb_hook_out(skb))
return dst_output(skb);
#endif
return nf_hook(NFPROTO_IPV4, NF_INET_LOCAL_OUT, skb, NULL,
skb_dst(skb)->dev, dst_output);
}
/* Passes this packet up the stack, updating its accounting.
* Some link protocols batch packets, so their rx_fixup paths
* can return clones as well as just modify the original skb.
*/
void usbnet_skb_return (struct usbnet *dev, struct sk_buff *skb)
{
int status;
skb->protocol = eth_type_trans (skb, dev->net);
dev->stats.rx_packets++;
dev->stats.rx_bytes += skb->len;
if (netif_msg_rx_status (dev))
devdbg (dev, "< rx, len %zu, type 0x%x",
skb->len + sizeof (struct ethhdr), skb->protocol);
memset (skb->cb, 0, sizeof (struct skb_data));
#if defined(CONFIG_RA_HW_NAT_PCI) && (defined(CONFIG_RA_HW_NAT) || defined(CONFIG_RA_HW_NAT_MODULE))
/* ra_sw_nat_hook_rx return 1 --> continue
* ra_sw_nat_hook_rx return 0 --> FWD & without netif_rx
*/
FOE_MAGIC_TAG(skb) = FOE_MAGIC_EXTIF;
FOE_AI_UNHIT(skb);
if(ra_sw_nat_hook_rx != NULL)
{
if(ra_sw_nat_hook_rx(skb)) {
status = netif_rx (skb);
if (status != NET_RX_SUCCESS && netif_msg_rx_err (dev))
devdbg (dev, "netif_rx status %d", status);
}
} else {
status = netif_rx (skb);
if (status != NET_RX_SUCCESS && netif_msg_rx_err (dev))
devdbg (dev, "netif_rx status %d", status);
}
#else
status = netif_rx (skb);
if (status != NET_RX_SUCCESS && netif_msg_rx_err (dev))
devdbg (dev, "netif_rx status %d", status);
#endif
}
int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl,
struct ipv6_txoptions *opt)
{
struct ipv6_pinfo *np = inet6_sk(sk);
struct in6_addr *first_hop = &fl->fl6_dst;
struct dst_entry *dst = skb->dst;
struct ipv6hdr *hdr;
u8 proto = fl->proto;
int seg_len = skb->len;
int hlimit, tclass;
u32 mtu;
if (opt) {
unsigned int head_room;
/* First: exthdrs may take lots of space (~8K for now)
MAX_HEADER is not enough.
*/
head_room = opt->opt_nflen + opt->opt_flen;
seg_len += head_room;
head_room += sizeof(struct ipv6hdr) + LL_RESERVED_SPACE(dst->dev);
if (skb_headroom(skb) < head_room) {
struct sk_buff *skb2 = skb_realloc_headroom(skb, head_room);
if (skb2 == NULL) {
IP6_INC_STATS(ip6_dst_idev(skb->dst),
IPSTATS_MIB_OUTDISCARDS);
kfree_skb(skb);
return -ENOBUFS;
}
kfree_skb(skb);
skb = skb2;
skb_set_owner_w(skb, sk);
}
if (opt->opt_flen)
ipv6_push_frag_opts(skb, opt, &proto);
if (opt->opt_nflen)
ipv6_push_nfrag_opts(skb, opt, &proto, &first_hop);
}
hdr = skb->nh.ipv6h = (struct ipv6hdr*)skb_push(skb, sizeof(struct ipv6hdr));
/*
* Fill in the IPv6 header
*/
hlimit = -1;
if (np)
hlimit = np->hop_limit;
if (hlimit < 0)
hlimit = ip6_dst_hoplimit(dst);
tclass = -1;
if (np)
tclass = np->tclass;
if (tclass < 0)
tclass = 0;
*(__be32 *)hdr = htonl(0x60000000 | (tclass << 20)) | fl->fl6_flowlabel;
hdr->payload_len = htons(seg_len);
hdr->nexthdr = proto;
hdr->hop_limit = hlimit;
ipv6_addr_copy(&hdr->saddr, &fl->fl6_src);
ipv6_addr_copy(&hdr->daddr, first_hop);
skb->protocol = htons(ETH_P_IPV6);
skb->priority = sk->sk_priority;
mtu = ip6_skb_dst_mtu(skb);
if ((skb->len <= mtu) || skb->ignore_df || skb_is_gso(skb)) {
IP6_INC_STATS(ip6_dst_idev(skb->dst),
IPSTATS_MIB_OUTREQUESTS);
#if defined (CONFIG_RA_HW_NAT_IPV6)
#if defined(CONFIG_RA_HW_NAT) || defined(CONFIG_RA_HW_NAT_MODULE)
FOE_MAGIC_TAG(skb) = 0;
FOE_AI_UNHIT(skb);
#endif
#endif
return NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, dst->dev,
dst_output);
}
skb->dev = dst->dev;
ipv6_local_error(sk, EMSGSIZE, fl, mtu);
IP6_INC_STATS(ip6_dst_idev(skb->dst), IPSTATS_MIB_FRAGFAILS);
kfree_skb(skb);
return -EMSGSIZE;
}
int ip6_push_pending_frames(struct sock *sk)
{
struct sk_buff *skb, *tmp_skb;
struct sk_buff **tail_skb;
struct in6_addr final_dst_buf, *final_dst = &final_dst_buf;
struct inet_sock *inet = inet_sk(sk);
struct ipv6_pinfo *np = inet6_sk(sk);
struct ipv6hdr *hdr;
struct ipv6_txoptions *opt = np->cork.opt;
struct rt6_info *rt = np->cork.rt;
struct flowi *fl = &inet->cork.fl;
unsigned char proto = fl->proto;
int err = 0;
if ((skb = __skb_dequeue(&sk->sk_write_queue)) == NULL)
goto out;
tail_skb = &(skb_shinfo(skb)->frag_list);
/* move skb->data to ip header from ext header */
if (skb->data < skb_network_header(skb))
__skb_pull(skb, skb_network_offset(skb));
while ((tmp_skb = __skb_dequeue(&sk->sk_write_queue)) != NULL) {
__skb_pull(tmp_skb, skb->h.raw - skb->nh.raw);
*tail_skb = tmp_skb;
tail_skb = &(tmp_skb->next);
skb->len += tmp_skb->len;
skb->data_len += tmp_skb->len;
skb->truesize += tmp_skb->truesize;
tmp_skb->destructor = NULL;
tmp_skb->sk = NULL;
}
ipv6_addr_copy(final_dst, &fl->fl6_dst);
__skb_pull(skb, skb->h.raw - skb->nh.raw);
if (opt && opt->opt_flen)
ipv6_push_frag_opts(skb, opt, &proto);
if (opt && opt->opt_nflen)
ipv6_push_nfrag_opts(skb, opt, &proto, &final_dst);
skb->nh.ipv6h = hdr = (struct ipv6hdr*) skb_push(skb, sizeof(struct ipv6hdr));
*(__be32*)hdr = fl->fl6_flowlabel |
htonl(0x60000000 | ((int)np->cork.tclass << 20));
if (skb->len <= sizeof(struct ipv6hdr) + IPV6_MAXPLEN)
hdr->payload_len = htons(skb->len - sizeof(struct ipv6hdr));
else
hdr->payload_len = 0;
hdr->hop_limit = np->cork.hop_limit;
hdr->nexthdr = proto;
ipv6_addr_copy(&hdr->saddr, &fl->fl6_src);
ipv6_addr_copy(&hdr->daddr, final_dst);
skb->priority = sk->sk_priority;
skb->dst = dst_clone(&rt->u.dst);
#if defined (CONFIG_RA_HW_NAT_IPV6)
#if defined(CONFIG_RA_HW_NAT) || defined(CONFIG_RA_HW_NAT_MODULE)
FOE_MAGIC_TAG(skb) = 0;
FOE_AI_UNHIT(skb);
#endif
#endif
IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTREQUESTS);
err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, skb->dst->dev, dst_output);
if (err) {
if (err > 0)
err = net_xmit_errno(err);
if (err)
goto error;
}
out:
inet->cork.flags &= ~IPCORK_OPT;
kfree(np->cork.opt);
np->cork.opt = NULL;
if (np->cork.rt) {
dst_release(&np->cork.rt->u.dst);
np->cork.rt = NULL;
inet->cork.flags &= ~IPCORK_ALLFRAG;
}
memset(&inet->cork.fl, 0, sizeof(inet->cork.fl));
return err;
error:
goto out;
}