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| author | Thomas Graf <tgraf@suug.ch> | 2005-11-05 21:14:04 +0100 |
|---|---|---|
| committer | Thomas Graf <tgr@axs.localdomain> | 2005-11-05 22:02:24 +0100 |
| commit | 2566a509cacc8b8eaea2e5b54068816c9cfb41c2 (patch) | |
| tree | 1413b02bd2e8a7c3046f10ed92af49e165ea8369 /include/net/inet_ecn.h | |
| parent | a783474591f2eed0348e08b15934fa9a25e23b3e (diff) | |
| download | linux-2566a509cacc8b8eaea2e5b54068816c9cfb41c2.tar.gz | |
[NET]: Introduce INET_ECN_set_ce() function
Changes IP_ECN_set_ce() and IP6_ECN_set_ce() to return 0 if the CE bits could not bet set because none of the ECT bits are set or 1 if the CE bits are already set or have been successfully set. Introduces INET_ECN_set_ce(skb) to enable CE bits for all supported protocols. Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Diffstat (limited to 'include/net/inet_ecn.h')
| -rw-r--r-- | include/net/inet_ecn.h | 28 |
1 files changed, 24 insertions, 4 deletions
diff --git a/include/net/inet_ecn.h b/include/net/inet_ecn.h index f87845e2e965..b0c47e2eccf1 100644 --- a/include/net/inet_ecn.h +++ b/include/net/inet_ecn.h @@ -2,6 +2,7 @@ #define _INET_ECN_H_ #include <linux/ip.h> +#include <linux/skbuff.h> #include <net/dsfield.h> enum { @@ -48,7 +49,7 @@ static inline __u8 INET_ECN_encapsulate(__u8 outer, __u8 inner) (label) |= __constant_htons(INET_ECN_ECT_0 << 4); \ } while (0) -static inline void IP_ECN_set_ce(struct iphdr *iph) +static inline int IP_ECN_set_ce(struct iphdr *iph) { u32 check = iph->check; u32 ecn = (iph->tos + 1) & INET_ECN_MASK; @@ -61,7 +62,7 @@ static inline void IP_ECN_set_ce(struct iphdr *iph) * INET_ECN_CE => 00 */ if (!(ecn & 2)) - return; + return !ecn; /* * The following gives us: @@ -72,6 +73,7 @@ static inline void IP_ECN_set_ce(struct iphdr *iph) iph->check = check + (check>=0xFFFF); iph->tos |= INET_ECN_CE; + return 1; } static inline void IP_ECN_clear(struct iphdr *iph) @@ -87,11 +89,12 @@ static inline void ipv4_copy_dscp(struct iphdr *outer, struct iphdr *inner) struct ipv6hdr; -static inline void IP6_ECN_set_ce(struct ipv6hdr *iph) +static inline int IP6_ECN_set_ce(struct ipv6hdr *iph) { if (INET_ECN_is_not_ect(ipv6_get_dsfield(iph))) - return; + return 0; *(u32*)iph |= htonl(INET_ECN_CE << 20); + return 1; } static inline void IP6_ECN_clear(struct ipv6hdr *iph) @@ -105,4 +108,21 @@ static inline void ipv6_copy_dscp(struct ipv6hdr *outer, struct ipv6hdr *inner) ipv6_change_dsfield(inner, INET_ECN_MASK, dscp); } +static inline int INET_ECN_set_ce(struct sk_buff *skb) +{ + switch (skb->protocol) { + case __constant_htons(ETH_P_IP): + if (skb->nh.raw + sizeof(struct iphdr) <= skb->tail) + return IP_ECN_set_ce(skb->nh.iph); + break; + + case __constant_htons(ETH_P_IPV6): + if (skb->nh.raw + sizeof(struct ipv6hdr) <= skb->tail) + return IP6_ECN_set_ce(skb->nh.ipv6h); + break; + } + + return 0; +} + #endif |