udp_offload.c (2423496af35d94a87156b063ea5cedffc10a70a1) udp_offload.c (7dd7eb9513bd02184d45f000ab69d78cb1fa1531)
1/*
2 * IPV6 GSO/GRO offload support
3 * Linux INET6 implementation
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version
8 * 2 of the License, or (at your option) any later version.

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24 unsigned int mss;
25 unsigned int unfrag_ip6hlen, unfrag_len;
26 struct frag_hdr *fptr;
27 u8 *packet_start, *prevhdr;
28 u8 nexthdr;
29 u8 frag_hdr_sz = sizeof(struct frag_hdr);
30 __wsum csum;
31 int tnl_hlen;
1/*
2 * IPV6 GSO/GRO offload support
3 * Linux INET6 implementation
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version
8 * 2 of the License, or (at your option) any later version.

--- 15 unchanged lines hidden (view full) ---

24 unsigned int mss;
25 unsigned int unfrag_ip6hlen, unfrag_len;
26 struct frag_hdr *fptr;
27 u8 *packet_start, *prevhdr;
28 u8 nexthdr;
29 u8 frag_hdr_sz = sizeof(struct frag_hdr);
30 __wsum csum;
31 int tnl_hlen;
32 int err;
32
33 mss = skb_shinfo(skb)->gso_size;
34 if (unlikely(skb->len <= mss))
35 goto out;
36
37 if (skb_gso_ok(skb, features | NETIF_F_GSO_ROBUST)) {
38 /* Packet is from an untrusted source, reset gso_segs. */
39

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85 if (skb->mac_header < (tnl_hlen + frag_hdr_sz)) {
86 if (gso_pskb_expand_head(skb, tnl_hlen + frag_hdr_sz))
87 goto out;
88 }
89
90 /* Find the unfragmentable header and shift it left by frag_hdr_sz
91 * bytes to insert fragment header.
92 */
33
34 mss = skb_shinfo(skb)->gso_size;
35 if (unlikely(skb->len <= mss))
36 goto out;
37
38 if (skb_gso_ok(skb, features | NETIF_F_GSO_ROBUST)) {
39 /* Packet is from an untrusted source, reset gso_segs. */
40

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86 if (skb->mac_header < (tnl_hlen + frag_hdr_sz)) {
87 if (gso_pskb_expand_head(skb, tnl_hlen + frag_hdr_sz))
88 goto out;
89 }
90
91 /* Find the unfragmentable header and shift it left by frag_hdr_sz
92 * bytes to insert fragment header.
93 */
93 unfrag_ip6hlen = ip6_find_1stfragopt(skb, &prevhdr);
94 if (unfrag_ip6hlen < 0)
95 return ERR_PTR(unfrag_ip6hlen);
94 err = ip6_find_1stfragopt(skb, &prevhdr);
95 if (err < 0)
96 return ERR_PTR(err);
97 unfrag_ip6hlen = err;
96 nexthdr = *prevhdr;
97 *prevhdr = NEXTHDR_FRAGMENT;
98 unfrag_len = (skb_network_header(skb) - skb_mac_header(skb)) +
99 unfrag_ip6hlen + tnl_hlen;
100 packet_start = (u8 *) skb->head + SKB_GSO_CB(skb)->mac_offset;
101 memmove(packet_start-frag_hdr_sz, packet_start, unfrag_len);
102
103 SKB_GSO_CB(skb)->mac_offset -= frag_hdr_sz;

--- 81 unchanged lines hidden --- 		98 nexthdr = *prevhdr;
99 *prevhdr = NEXTHDR_FRAGMENT;
100 unfrag_len = (skb_network_header(skb) - skb_mac_header(skb)) +
101 unfrag_ip6hlen + tnl_hlen;
102 packet_start = (u8 *) skb->head + SKB_GSO_CB(skb)->mac_offset;
103 memmove(packet_start-frag_hdr_sz, packet_start, unfrag_len);
104
105 SKB_GSO_CB(skb)->mac_offset -= frag_hdr_sz;

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