datapath/linux/compat/include/net/inet_ecn.h

   1 #ifndef _INET_ECN_WRAPPER_H_
   2 #define _INET_ECN_WRAPPER_H_
   3
   4 #include_next <net/inet_ecn.h>
   5
   6 #define INET_ECN_decapsulate rpl_INET_ECN_decapsulate
   7 static inline int INET_ECN_decapsulate(struct sk_buff *skb,
   8                                        __u8 outer, __u8 inner)
   9 {
  10         if (INET_ECN_is_not_ect(inner)) {
  11                 switch (outer & INET_ECN_MASK) {
  12                         case INET_ECN_NOT_ECT:
  13                                 return 0;
  14                         case INET_ECN_ECT_0:
  15                         case INET_ECN_ECT_1:
  16                                 return 1;
  17                         case INET_ECN_CE:
  18                                 return 2;
  19                 }
  20         }
  21
  22         if (INET_ECN_is_ce(outer))
  23                 INET_ECN_set_ce(skb);
  24
  25         return 0;
  26 }
  27
  28 #define IP_ECN_decapsulate rpl_IP_ECN_decapsulate
  29 static inline int IP_ECN_decapsulate(const struct iphdr *oiph,
  30                 struct sk_buff *skb)
  31 {
  32         __u8 inner;
  33
  34         if (skb->protocol == htons(ETH_P_IP))
  35                 inner = ip_hdr(skb)->tos;
  36         else if (skb->protocol == htons(ETH_P_IPV6))
  37                 inner = ipv6_get_dsfield(ipv6_hdr(skb));
  38         else
  39                 return 0;
  40
  41         return INET_ECN_decapsulate(skb, oiph->tos, inner);
  42 }
  43
  44 #define IP6_ECN_decapsulate rpl_IP6_ECN_decapsulate
  45 static inline int IP6_ECN_decapsulate(const struct ipv6hdr *oipv6h,
  46                                       struct sk_buff *skb)
  47 {
  48         __u8 inner;
  49
  50         if (skb->protocol == htons(ETH_P_IP))
  51                 inner = ip_hdr(skb)->tos;
  52         else if (skb->protocol == htons(ETH_P_IPV6))
  53                 inner = ipv6_get_dsfield(ipv6_hdr(skb));
  54         else
  55                 return 0;
  56
  57         return INET_ECN_decapsulate(skb, ipv6_get_dsfield(oipv6h), inner);
  58 }
  59 #endif