diff options
Diffstat (limited to 'net/ipv6/ipcomp6.c')
| -rw-r--r-- | net/ipv6/ipcomp6.c | 27 |
1 files changed, 5 insertions, 22 deletions
diff --git a/net/ipv6/ipcomp6.c b/net/ipv6/ipcomp6.c index 48636436028a..cec3be544b69 100644 --- a/net/ipv6/ipcomp6.c +++ b/net/ipv6/ipcomp6.c @@ -66,10 +66,8 @@ static LIST_HEAD(ipcomp6_tfms_list); static int ipcomp6_input(struct xfrm_state *x, struct sk_buff *skb) { int err = 0; - u8 nexthdr = 0; - int hdr_len = skb->h.raw - skb->nh.raw; - unsigned char *tmp_hdr = NULL; struct ipv6hdr *iph; + struct ipv6_comp_hdr *ipch; int plen, dlen; struct ipcomp_data *ipcd = x->data; u8 *start, *scratch; @@ -86,17 +84,9 @@ static int ipcomp6_input(struct xfrm_state *x, struct sk_buff *skb) /* Remove ipcomp header and decompress original payload */ iph = skb->nh.ipv6h; - tmp_hdr = kmalloc(hdr_len, GFP_ATOMIC); - if (!tmp_hdr) - goto out; - memcpy(tmp_hdr, iph, hdr_len); - nexthdr = *(u8 *)skb->data; - skb_pull(skb, sizeof(struct ipv6_comp_hdr)); - skb->nh.raw += sizeof(struct ipv6_comp_hdr); - memcpy(skb->nh.raw, tmp_hdr, hdr_len); - iph = skb->nh.ipv6h; - iph->payload_len = htons(ntohs(iph->payload_len) - sizeof(struct ipv6_comp_hdr)); - skb->h.raw = skb->data; + ipch = (void *)skb->data; + skb->h.raw = skb->nh.raw + sizeof(*ipch); + __skb_pull(skb, sizeof(*ipch)); /* decompression */ plen = skb->len; @@ -125,18 +115,11 @@ static int ipcomp6_input(struct xfrm_state *x, struct sk_buff *skb) skb_put(skb, dlen - plen); memcpy(skb->data, scratch, dlen); + err = ipch->nexthdr; - iph = skb->nh.ipv6h; - iph->payload_len = htons(skb->len); - out_put_cpu: put_cpu(); out: - kfree(tmp_hdr); - if (err) - goto error_out; - return nexthdr; -error_out: return err; } |