diff options
Diffstat (limited to 'net/ipv6/tcp_ipv6.c')
-rw-r--r-- | net/ipv6/tcp_ipv6.c | 154 |
1 files changed, 1 insertions, 153 deletions
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index 2bc7fafe7668..fb291b81cf63 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -47,6 +47,7 @@ #include <net/tcp.h> #include <net/ndisc.h> +#include <net/inet6_hashtables.h> #include <net/ipv6.h> #include <net/transp_v6.h> #include <net/addrconf.h> @@ -75,30 +76,6 @@ static int tcp_v6_xmit(struct sk_buff *skb, int ipfragok); static struct tcp_func ipv6_mapped; static struct tcp_func ipv6_specific; -/* I have no idea if this is a good hash for v6 or not. -DaveM */ -static inline int inet6_ehashfn(const struct in6_addr *laddr, const u16 lport, - const struct in6_addr *faddr, const u16 fport, - const int ehash_size) -{ - int hashent = (lport ^ fport); - - hashent ^= (laddr->s6_addr32[3] ^ faddr->s6_addr32[3]); - hashent ^= hashent>>16; - hashent ^= hashent>>8; - return (hashent & (ehash_size - 1)); -} - -static inline int inet6_sk_ehashfn(const struct sock *sk, const int ehash_size) -{ - const struct inet_sock *inet = inet_sk(sk); - const struct ipv6_pinfo *np = inet6_sk(sk); - const struct in6_addr *laddr = &np->rcv_saddr; - const struct in6_addr *faddr = &np->daddr; - const __u16 lport = inet->num; - const __u16 fport = inet->dport; - return inet6_ehashfn(laddr, lport, faddr, fport, ehash_size); -} - static inline int tcp_v6_bind_conflict(const struct sock *sk, const struct inet_bind_bucket *tb) { @@ -259,135 +236,6 @@ static void tcp_v6_hash(struct sock *sk) } } -static struct sock *inet6_lookup_listener(struct inet_hashinfo *hashinfo, - const struct in6_addr *daddr, - const unsigned short hnum, - const int dif) -{ - struct sock *sk; - struct hlist_node *node; - struct sock *result = NULL; - int score, hiscore; - - hiscore=0; - read_lock(&hashinfo->lhash_lock); - sk_for_each(sk, node, &hashinfo->listening_hash[inet_lhashfn(hnum)]) { - if (inet_sk(sk)->num == hnum && sk->sk_family == PF_INET6) { - struct ipv6_pinfo *np = inet6_sk(sk); - - score = 1; - if (!ipv6_addr_any(&np->rcv_saddr)) { - if (!ipv6_addr_equal(&np->rcv_saddr, daddr)) - continue; - score++; - } - if (sk->sk_bound_dev_if) { - if (sk->sk_bound_dev_if != dif) - continue; - score++; - } - if (score == 3) { - result = sk; - break; - } - if (score > hiscore) { - hiscore = score; - result = sk; - } - } - } - if (result) - sock_hold(result); - read_unlock(&hashinfo->lhash_lock); - return result; -} - -/* Sockets in TCP_CLOSE state are _always_ taken out of the hash, so - * we need not check it for TCP lookups anymore, thanks Alexey. -DaveM - * - * The sockhash lock must be held as a reader here. - */ - -static inline struct sock * - __inet6_lookup_established(struct inet_hashinfo *hashinfo, - const struct in6_addr *saddr, - const u16 sport, - const struct in6_addr *daddr, - const u16 hnum, - const int dif) -{ - struct sock *sk; - const struct hlist_node *node; - const __u32 ports = INET_COMBINED_PORTS(sport, hnum); - /* Optimize here for direct hit, only listening connections can - * have wildcards anyways. - */ - const int hash = inet6_ehashfn(daddr, hnum, saddr, sport, - hashinfo->ehash_size); - struct inet_ehash_bucket *head = &hashinfo->ehash[hash]; - - read_lock(&head->lock); - sk_for_each(sk, node, &head->chain) { - /* For IPV6 do the cheaper port and family tests first. */ - if (INET6_MATCH(sk, saddr, daddr, ports, dif)) - goto hit; /* You sunk my battleship! */ - } - /* Must check for a TIME_WAIT'er before going to listener hash. */ - sk_for_each(sk, node, &(head + hashinfo->ehash_size)->chain) { - const struct inet_timewait_sock *tw = inet_twsk(sk); - - if(*((__u32 *)&(tw->tw_dport)) == ports && - sk->sk_family == PF_INET6) { - const struct tcp6_timewait_sock *tcp6tw = tcp6_twsk(sk); - - if (ipv6_addr_equal(&tcp6tw->tw_v6_daddr, saddr) && - ipv6_addr_equal(&tcp6tw->tw_v6_rcv_saddr, daddr) && - (!sk->sk_bound_dev_if || sk->sk_bound_dev_if == dif)) - goto hit; - } - } - read_unlock(&head->lock); - return NULL; - -hit: - sock_hold(sk); - read_unlock(&head->lock); - return sk; -} - - -static inline struct sock *__inet6_lookup(struct inet_hashinfo *hashinfo, - const struct in6_addr *saddr, - const u16 sport, - const struct in6_addr *daddr, - const u16 hnum, - const int dif) -{ - struct sock *sk = __inet6_lookup_established(hashinfo, saddr, sport, - daddr, hnum, dif); - if (sk) - return sk; - - return inet6_lookup_listener(hashinfo, daddr, hnum, dif); -} - -inline struct sock *inet6_lookup(struct inet_hashinfo *hashinfo, - const struct in6_addr *saddr, const u16 sport, - const struct in6_addr *daddr, const u16 dport, - const int dif) -{ - struct sock *sk; - - local_bh_disable(); - sk = __inet6_lookup(hashinfo, saddr, sport, daddr, ntohs(dport), dif); - local_bh_enable(); - - return sk; -} - -EXPORT_SYMBOL_GPL(inet6_lookup); - - /* * Open request hash tables. */ |