diff options
Diffstat (limited to 'include/net/ip.h')
| -rw-r--r-- | include/net/ip.h | 46 |
1 files changed, 35 insertions, 11 deletions
diff --git a/include/net/ip.h b/include/net/ip.h index af8addbaa3c1..ecffd843e7b8 100644 --- a/include/net/ip.h +++ b/include/net/ip.h @@ -26,12 +26,14 @@ #include <linux/ip.h> #include <linux/in.h> #include <linux/skbuff.h> +#include <linux/jhash.h> #include <net/inet_sock.h> #include <net/route.h> #include <net/snmp.h> #include <net/flow.h> #include <net/flow_dissector.h> +#include <net/netns/hash.h> #define IPV4_MAX_PMTU 65535U /* RFC 2675, Section 5.1 */ #define IPV4_MIN_MTU 68 /* RFC 791 */ @@ -89,6 +91,17 @@ static inline int inet_sdif(struct sk_buff *skb) return 0; } +/* Special input handler for packets caught by router alert option. + They are selected only by protocol field, and then processed likely + local ones; but only if someone wants them! Otherwise, router + not running rsvpd will kill RSVP. + + It is user level problem, what it will make with them. + I have no idea, how it will masquearde or NAT them (it is joke, joke :-)), + but receiver should be enough clever f.e. to forward mtrace requests, + sent to multicast group to reach destination designated router. + */ + struct ip_ra_chain { struct ip_ra_chain __rcu *next; struct sock *sk; @@ -99,8 +112,6 @@ struct ip_ra_chain { struct rcu_head rcu; }; -extern struct ip_ra_chain __rcu *ip_ra_chain; - /* IP flags. */ #define IP_CE 0x8000 /* Flag: "Congestion" */ #define IP_DF 0x4000 /* Flag: "Don't Fragment" */ @@ -184,15 +195,15 @@ int ip4_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len); void ip4_datagram_release_cb(struct sock *sk); struct ip_reply_arg { - struct kvec iov[1]; + struct kvec iov[1]; int flags; __wsum csum; int csumoffset; /* u16 offset of csum in iov[0].iov_base */ - /* -1 if not needed */ + /* -1 if not needed */ int bound_dev_if; u8 tos; kuid_t uid; -}; +}; #define IP_REPLY_ARG_NOSRCCHECK 1 @@ -326,6 +337,13 @@ int ip_decrease_ttl(struct iphdr *iph) return --iph->ttl; } +static inline int ip_mtu_locked(const struct dst_entry *dst) +{ + const struct rtable *rt = (const struct rtable *)dst; + + return rt->rt_mtu_locked || dst_metric_locked(dst, RTAX_MTU); +} + static inline int ip_dont_fragment(const struct sock *sk, const struct dst_entry *dst) { @@ -333,7 +351,7 @@ int ip_dont_fragment(const struct sock *sk, const struct dst_entry *dst) return pmtudisc == IP_PMTUDISC_DO || (pmtudisc == IP_PMTUDISC_WANT && - !(dst_metric_locked(dst, RTAX_MTU))); + !ip_mtu_locked(dst)); } static inline bool ip_sk_accept_pmtu(const struct sock *sk) @@ -359,7 +377,7 @@ static inline unsigned int ip_dst_mtu_maybe_forward(const struct dst_entry *dst, struct net *net = dev_net(dst->dev); if (net->ipv4.sysctl_ip_fwd_use_pmtu || - dst_metric_locked(dst, RTAX_MTU) || + ip_mtu_locked(dst) || !forwarding) return dst_mtu(dst); @@ -522,6 +540,13 @@ static inline unsigned int ipv4_addr_hash(__be32 ip) return (__force unsigned int) ip; } +static inline u32 ipv4_portaddr_hash(const struct net *net, + __be32 saddr, + unsigned int port) +{ + return jhash_1word((__force u32)saddr, net_hash_mix(net)) ^ port; +} + bool ip_call_ra_chain(struct sk_buff *skb); /* @@ -563,18 +588,17 @@ static inline struct sk_buff *ip_check_defrag(struct net *net, struct sk_buff *s return skb; } #endif -int ip_frag_mem(struct net *net); /* * Functions provided by ip_forward.c */ - + int ip_forward(struct sk_buff *skb); - + /* * Functions provided by ip_options.c */ - + void ip_options_build(struct sk_buff *skb, struct ip_options *opt, __be32 daddr, struct rtable *rt, int is_frag); |