target/linux/generic-2.6/patches/999-backport_ip_hdr_and_friends.patch

   1 Index: linux-2.6.21.7/include/linux/ip.h
   2 ===================================================================
   3 --- linux-2.6.21.7.orig/include/linux/ip.h
   4 +++ linux-2.6.21.7/include/linux/ip.h
   5 @@ -104,6 +104,16 @@ struct iphdr {
   6         /*The options start here. */
   7  };
   8
   9 +#ifdef __KERNEL__
  10 +#include <linux/skbuff.h>
  11 +
  12 +static inline struct iphdr *ip_hdr(const struct sk_buff *skb)
  13 +{
  14 +       return (struct iphdr *)skb_network_header(skb);
  15 +}
  16 +
  17 +#endif
  18 +
  19  struct ip_auth_hdr {
  20         __u8  nexthdr;
  21         __u8  hdrlen;           /* This one is measured in 32 bit units! */
  22 Index: linux-2.6.21.7/include/linux/skbuff.h
  23 ===================================================================
  24 --- linux-2.6.21.7.orig/include/linux/skbuff.h
  25 +++ linux-2.6.21.7/include/linux/skbuff.h
  26 @@ -966,6 +966,16 @@ static inline void skb_reserve(struct sk
  27         skb->tail += len;
  28  }
  29
  30 +static inline unsigned char *skb_network_header(const struct sk_buff *skb)
  31 +{
  32 +       return skb->nh.raw;
  33 +}
  34 +
  35 +static inline unsigned char *skb_tail_pointer(const struct sk_buff *skb)
  36 +{
  37 +       return skb->tail;
  38 +}
  39 +
  40  /*
  41   * CPUs often take a performance hit when accessing unaligned memory
  42   * locations. The actual performance hit varies, it can be small if the
  43 Index: linux-2.6.21.7/include/net/ip.h
  44 ===================================================================
  45 --- linux-2.6.21.7.orig/include/net/ip.h
  46 +++ linux-2.6.21.7/include/net/ip.h
  47 @@ -43,6 +43,11 @@ struct inet_skb_parm
  48  #define IPSKB_REROUTED         16
  49  };
  50
  51 +static inline unsigned int ip_hdrlen(const struct sk_buff *skb)
  52 +{
  53 +       return ip_hdr(skb)->ihl * 4;
  54 +}
  55 +
  56  struct ipcm_cookie
  57  {
  58         __be32                  addr;