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[IPV6]: Introduce inet6_timewait_sock

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Out of tcp6_timewait_sock, that now is just an aggregation of
inet_timewait_sock and inet6_timewait_sock, using tw_ipv6_offset in struct
inet_timewait_sock, that is common to the IPv6 transport protocols that use
timewait sockets, like DCCP and TCP.

tw_ipv6_offset plays the struct inet_sock pinfo6 role, i.e. for the generic
code to find the IPv6 area in a timewait sock.

Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnaldo Carvalho de Melo 2005-12-13 23:23:09 -08:00 • committed by David S. Miller
parent b9750ce13c
commit 0fa1a53e1f
7 changed files with 42 additions and 29 deletions
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34
include/linux/ipv6.h
View file

@ -348,26 +348,36 @@ static inline void inet_sk_copy_descendant(struct sock *sk_to,
#include <linux/tcp.h>
struct tcp6_timewait_sock {
struct tcp_timewait_sock tw_v6_sk;
struct in6_addr tw_v6_daddr;
struct in6_addr tw_v6_rcv_saddr;
struct inet6_timewait_sock {
struct in6_addr tw_v6_daddr;
struct in6_addr tw_v6_rcv_saddr;
};
static inline struct tcp6_timewait_sock *tcp6_twsk(const struct sock *sk)
struct tcp6_timewait_sock {
struct tcp_timewait_sock tcp6tw_tcp;
struct inet6_timewait_sock tcp6tw_inet6;
};
static inline u16 inet6_tw_offset(const struct proto *prot)
{
return (struct tcp6_timewait_sock *)sk;
return prot->twsk_obj_size - sizeof(struct inet6_timewait_sock);
}
static inline struct in6_addr *__tcp_v6_rcv_saddr(const struct sock *sk)
static inline struct inet6_timewait_sock *inet6_twsk(const struct sock *sk)
{
return (struct inet6_timewait_sock *)(((u8 *)sk) +
inet_twsk(sk)->tw_ipv6_offset);
}
static inline struct in6_addr *__inet6_rcv_saddr(const struct sock *sk)
{
return likely(sk->sk_state != TCP_TIME_WAIT) ?
&inet6_sk(sk)->rcv_saddr : &tcp6_twsk(sk)->tw_v6_rcv_saddr;
&inet6_sk(sk)->rcv_saddr : &inet6_twsk(sk)->tw_v6_rcv_saddr;
}
static inline struct in6_addr *tcp_v6_rcv_saddr(const struct sock *sk)
static inline struct in6_addr *inet6_rcv_saddr(const struct sock *sk)
{
return sk->sk_family == AF_INET6 ? __tcp_v6_rcv_saddr(sk) : NULL;
return sk->sk_family == AF_INET6 ? __inet6_rcv_saddr(sk) : NULL;
}
static inline int inet_v6_ipv6only(const struct sock *sk)
@ -395,8 +405,8 @@ static inline struct raw6_sock *raw6_sk(const struct sock *sk)
return NULL;
}
#define __tcp_v6_rcv_saddr(__sk) NULL
#define tcp_v6_rcv_saddr(__sk) NULL
#define __inet6_rcv_saddr(__sk) NULL
#define inet6_rcv_saddr(__sk) NULL
#define tcp_twsk_ipv6only(__sk) 0
#define inet_v6_ipv6only(__sk) 0
#endif /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */