static inline int ip_finish_output(struct sk_buff *skb)
{
- struct net_device *dev = skb->dst->dev;
-
- skb->dev = dev;
- skb->protocol = htons(ETH_P_IP);
-
- return NF_HOOK(PF_INET, NF_IP_POST_ROUTING, skb, NULL, dev,
- ip_finish_output2);
+ if (skb->len > dst_mtu(skb->dst) &&
+ !(skb_shinfo(skb)->ufo_size || skb_shinfo(skb)->tso_size))
+ return ip_fragment(skb, ip_finish_output2);
+ else
+ return ip_finish_output2(skb);
}
int ip_mc_output(struct sk_buff *skb)
newskb->dev, ip_dev_loopback_xmit);
}
- if (skb->len > dst_mtu(&rt->u.dst))
- return ip_fragment(skb, ip_finish_output);
- else
- return ip_finish_output(skb);
+ return NF_HOOK(PF_INET, NF_IP_POST_ROUTING, skb, NULL, skb->dev,
+ ip_finish_output);
}
int ip_output(struct sk_buff *skb)
{
+ struct net_device *dev = skb->dst->dev;
+
IP_INC_STATS(IPSTATS_MIB_OUTREQUESTS);
- if (skb->len > dst_mtu(skb->dst) && !skb_shinfo(skb)->tso_size)
- return ip_fragment(skb, ip_finish_output);
- else
- return ip_finish_output(skb);
+ skb->dev = dev;
+ skb->protocol = htons(ETH_P_IP);
+
+ return NF_HOOK(PF_INET, NF_IP_POST_ROUTING, skb, NULL, dev,
+ ip_finish_output);
}
int ip_queue_xmit(struct sk_buff *skb, int ipfragok)
ip_options_build(skb, opt, inet->daddr, rt, 0);
}
- ip_select_ident_more(iph, &rt->u.dst, sk, skb_shinfo(skb)->tso_segs);
+ ip_select_ident_more(iph, &rt->u.dst, sk,
+ (skb_shinfo(skb)->tso_segs ?: 1) - 1);
/* Add an IP checksum. */
ip_send_check(iph);
hlen = iph->ihl * 4;
mtu = dst_mtu(&rt->u.dst) - hlen; /* Size of data space */
+ IPCB(skb)->flags |= IPSKB_FRAG_COMPLETE;
/* When frag_list is given, use it. First, check its validity:
* some transformers could create wrong frag_list or break existing
return csum;
}
+static inline int ip_ufo_append_data(struct sock *sk,
+ int getfrag(void *from, char *to, int offset, int len,
+ int odd, struct sk_buff *skb),
+ void *from, int length, int hh_len, int fragheaderlen,
+ int transhdrlen, int mtu,unsigned int flags)
+{
+ struct sk_buff *skb;
+ int err;
+
+ /* There is support for UDP fragmentation offload by network
+ * device, so create one single skb packet containing complete
+ * udp datagram
+ */
+ if ((skb = skb_peek_tail(&sk->sk_write_queue)) == NULL) {
+ skb = sock_alloc_send_skb(sk,
+ hh_len + fragheaderlen + transhdrlen + 20,
+ (flags & MSG_DONTWAIT), &err);
+
+ if (skb == NULL)
+ return err;
+
+ /* reserve space for Hardware header */
+ skb_reserve(skb, hh_len);
+
+ /* create space for UDP/IP header */
+ skb_put(skb,fragheaderlen + transhdrlen);
+
+ /* initialize network header pointer */
+ skb->nh.raw = skb->data;
+
+ /* initialize protocol header pointer */
+ skb->h.raw = skb->data + fragheaderlen;
+
+ skb->ip_summed = CHECKSUM_HW;
+ skb->csum = 0;
+ sk->sk_sndmsg_off = 0;
+ }
+
+ err = skb_append_datato_frags(sk,skb, getfrag, from,
+ (length - transhdrlen));
+ if (!err) {
+ /* specify the length of each IP datagram fragment*/
+ skb_shinfo(skb)->ufo_size = (mtu - fragheaderlen);
+ __skb_queue_tail(&sk->sk_write_queue, skb);
+
+ return 0;
+ }
+ /* There is not enough support do UFO ,
+ * so follow normal path
+ */
+ kfree_skb(skb);
+ return err;
+}
+
/*
* ip_append_data() and ip_append_page() can make one large IP datagram
* from many pieces of data. Each pieces will be holded on the socket
csummode = CHECKSUM_HW;
inet->cork.length += length;
+ if (((length > mtu) && (sk->sk_protocol == IPPROTO_UDP)) &&
+ (rt->u.dst.dev->features & NETIF_F_UFO)) {
+
+ if(ip_ufo_append_data(sk, getfrag, from, length, hh_len,
+ fragheaderlen, transhdrlen, mtu, flags))
+ goto error;
+
+ return 0;
+ }
/* So, what's going on in the loop below?
*
return -EINVAL;
inet->cork.length += size;
+ if ((sk->sk_protocol == IPPROTO_UDP) &&
+ (rt->u.dst.dev->features & NETIF_F_UFO))
+ skb_shinfo(skb)->ufo_size = (mtu - fragheaderlen);
+
while (size > 0) {
int i;
- /* Check if the remaining data fits into current packet. */
- len = mtu - skb->len;
- if (len < size)
- len = maxfraglen - skb->len;
+ if (skb_shinfo(skb)->ufo_size)
+ len = size;
+ else {
+
+ /* Check if the remaining data fits into current packet. */
+ len = mtu - skb->len;
+ if (len < size)
+ len = maxfraglen - skb->len;
+ }
if (len <= 0) {
struct sk_buff *skb_prev;
char *data;
out:
inet->cork.flags &= ~IPCORK_OPT;
- if (inet->cork.opt) {
- kfree(inet->cork.opt);
- inet->cork.opt = NULL;
- }
+ kfree(inet->cork.opt);
+ inet->cork.opt = NULL;
if (inet->cork.rt) {
ip_rt_put(inet->cork.rt);
inet->cork.rt = NULL;
kfree_skb(skb);
inet->cork.flags &= ~IPCORK_OPT;
- if (inet->cork.opt) {
- kfree(inet->cork.opt);
- inet->cork.opt = NULL;
- }
+ kfree(inet->cork.opt);
+ inet->cork.opt = NULL;
if (inet->cork.rt) {
ip_rt_put(inet->cork.rt);
inet->cork.rt = NULL;