diff options
| author | Julius Volz <juliusv@google.com> | 2008-09-02 15:55:34 +0200 |
|---|---|---|
| committer | Simon Horman <horms@verge.net.au> | 2008-09-05 11:17:03 +1000 |
| commit | 64aae3cb9fd22f33e491c4730d363eb2229ef910 (patch) | |
| tree | 71a9ac96d585d4998e4df7c33aa515764d5ad5e1 /include | |
| parent | e7ade46a53055c19a01c8becbe7807f9075d6fee (diff) | |
IPVS: Add general v4/v6 helper functions / data structures
Add a struct ip_vs_iphdr for easier handling of common v4 and v6 header
fields in the same code path. ip_vs_fill_iphdr() helps to fill this struct
from an IPv4 or IPv6 header. Add further helper functions for copying and
comparing addresses.
Signed-off-by: Julius Volz <juliusv@google.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/ip_vs.h | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/include/net/ip_vs.h b/include/net/ip_vs.h index d3282558550..5d6313d972f 100644 --- a/include/net/ip_vs.h +++ b/include/net/ip_vs.h @@ -25,6 +25,55 @@ #include <linux/ipv6.h> /* for struct ipv6hdr */ #include <net/ipv6.h> /* for ipv6_addr_copy */ +struct ip_vs_iphdr { + int len; + __u8 protocol; + union nf_inet_addr saddr; + union nf_inet_addr daddr; +}; + +static inline void +ip_vs_fill_iphdr(int af, const void *nh, struct ip_vs_iphdr *iphdr) +{ +#ifdef CONFIG_IP_VS_IPV6 + if (af == AF_INET6) { + const struct ipv6hdr *iph = nh; + iphdr->len = sizeof(struct ipv6hdr); + iphdr->protocol = iph->nexthdr; + ipv6_addr_copy(&iphdr->saddr.in6, &iph->saddr); + ipv6_addr_copy(&iphdr->daddr.in6, &iph->daddr); + } else +#endif + { + const struct iphdr *iph = nh; + iphdr->len = iph->ihl * 4; + iphdr->protocol = iph->protocol; + iphdr->saddr.ip = iph->saddr; + iphdr->daddr.ip = iph->daddr; + } +} + +static inline void ip_vs_addr_copy(int af, union nf_inet_addr *dst, + const union nf_inet_addr *src) +{ +#ifdef CONFIG_IP_VS_IPV6 + if (af == AF_INET6) + ipv6_addr_copy(&dst->in6, &src->in6); + else +#endif + dst->ip = src->ip; +} + +static inline int ip_vs_addr_equal(int af, const union nf_inet_addr *a, + const union nf_inet_addr *b) +{ +#ifdef CONFIG_IP_VS_IPV6 + if (af == AF_INET6) + return ipv6_addr_equal(&a->in6, &b->in6); +#endif + return a->ip == b->ip; +} + #ifdef CONFIG_IP_VS_DEBUG #include <linux/net.h> |