Commit 8129765a authored by Arnaldo Carvalho de Melo's avatar Arnaldo Carvalho de Melo Committed by David S. Miller

[IPV6]: Generalise tcp_v6_search_req & tcp_v6_synq_add

More work is needed tho to introduce inet6_request_sock from
tcp6_request_sock, in the same layout considerations as ipv6_pinfo in
inet_sock, next changeset will do that.
Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent c2977c22
/*
* NET Generic infrastructure for INET6 connection oriented protocols.
*
* Authors: Many people, see the TCPv6 sources
*
* From code originally in TCPv6
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#ifndef _INET6_CONNECTION_SOCK_H
#define _INET6_CONNECTION_SOCK_H
#include <linux/types.h>
struct sock;
struct request_sock;
extern struct request_sock *inet6_csk_search_req(const struct sock *sk,
struct request_sock ***prevp,
const __u16 rport,
const struct in6_addr *raddr,
const struct in6_addr *laddr,
const int iif);
extern void inet6_csk_reqsk_queue_hash_add(struct sock *sk,
struct request_sock *req,
const unsigned long timeout);
#endif /* _INET6_CONNECTION_SOCK_H */
......@@ -244,7 +244,7 @@ static inline int reqsk_queue_is_full(const struct request_sock_queue *queue)
static inline void reqsk_queue_hash_req(struct request_sock_queue *queue,
u32 hash, struct request_sock *req,
unsigned timeout)
unsigned long timeout)
{
struct listen_sock *lopt = queue->listen_opt;
......
......@@ -8,7 +8,8 @@ ipv6-objs := af_inet6.o anycast.o ip6_output.o ip6_input.o addrconf.o sit.o \
route.o ip6_fib.o ipv6_sockglue.o ndisc.o udp.o raw.o \
protocol.o icmp.o mcast.o reassembly.o tcp_ipv6.o \
exthdrs.o sysctl_net_ipv6.o datagram.o proc.o \
ip6_flowlabel.o ipv6_syms.o netfilter.o
ip6_flowlabel.o ipv6_syms.o netfilter.o \
inet6_connection_sock.o
ipv6-$(CONFIG_XFRM) += xfrm6_policy.o xfrm6_state.o xfrm6_input.o \
xfrm6_output.o
......
/*
* INET An implementation of the TCP/IP protocol suite for the LINUX
* operating system. INET is implemented using the BSD Socket
* interface as the means of communication with the user level.
*
* Support for INET6 connection oriented protocols.
*
* Authors: See the TCPv6 sources
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or(at your option) any later version.
*/
#include <linux/config.h>
#include <linux/module.h>
#include <linux/in6.h>
#include <linux/ipv6.h>
#include <linux/jhash.h>
#include <net/addrconf.h>
#include <net/inet_connection_sock.h>
#include <net/sock.h>
/*
* request_sock (formerly open request) hash tables.
*/
static u32 inet6_synq_hash(const struct in6_addr *raddr, const u16 rport,
const u32 rnd, const u16 synq_hsize)
{
u32 a = raddr->s6_addr32[0];
u32 b = raddr->s6_addr32[1];
u32 c = raddr->s6_addr32[2];
a += JHASH_GOLDEN_RATIO;
b += JHASH_GOLDEN_RATIO;
c += rnd;
__jhash_mix(a, b, c);
a += raddr->s6_addr32[3];
b += (u32)rport;
__jhash_mix(a, b, c);
return c & (synq_hsize - 1);
}
struct request_sock *inet6_csk_search_req(const struct sock *sk,
struct request_sock ***prevp,
const __u16 rport,
const struct in6_addr *raddr,
const struct in6_addr *laddr,
const int iif)
{
const struct inet_connection_sock *icsk = inet_csk(sk);
struct listen_sock *lopt = icsk->icsk_accept_queue.listen_opt;
struct request_sock *req, **prev;
for (prev = &lopt->syn_table[inet6_synq_hash(raddr, rport,
lopt->hash_rnd,
lopt->nr_table_entries)];
(req = *prev) != NULL;
prev = &req->dl_next) {
const struct tcp6_request_sock *treq = tcp6_rsk(req);
if (inet_rsk(req)->rmt_port == rport &&
req->rsk_ops->family == AF_INET6 &&
ipv6_addr_equal(&treq->rmt_addr, raddr) &&
ipv6_addr_equal(&treq->loc_addr, laddr) &&
(!treq->iif || treq->iif == iif)) {
BUG_TRAP(req->sk == NULL);
*prevp = prev;
return req;
}
}
return NULL;
}
EXPORT_SYMBOL_GPL(inet6_csk_search_req);
void inet6_csk_reqsk_queue_hash_add(struct sock *sk,
struct request_sock *req,
const unsigned long timeout)
{
struct inet_connection_sock *icsk = inet_csk(sk);
struct listen_sock *lopt = icsk->icsk_accept_queue.listen_opt;
const u32 h = inet6_synq_hash(&tcp6_rsk(req)->rmt_addr,
inet_rsk(req)->rmt_port,
lopt->hash_rnd, lopt->nr_table_entries);
reqsk_queue_hash_req(&icsk->icsk_accept_queue, h, req, timeout);
inet_csk_reqsk_queue_added(sk, timeout);
}
EXPORT_SYMBOL_GPL(inet6_csk_reqsk_queue_hash_add);
......@@ -48,6 +48,7 @@
#include <net/tcp.h>
#include <net/ndisc.h>
#include <net/inet6_hashtables.h>
#include <net/inet6_connection_sock.h>
#include <net/ipv6.h>
#include <net/transp_v6.h>
#include <net/addrconf.h>
......@@ -118,60 +119,6 @@ static void tcp_v6_hash(struct sock *sk)
}
}
/*
* Open request hash tables.
*/
static u32 tcp_v6_synq_hash(const struct in6_addr *raddr, const u16 rport, const u32 rnd)
{
u32 a, b, c;
a = raddr->s6_addr32[0];
b = raddr->s6_addr32[1];
c = raddr->s6_addr32[2];
a += JHASH_GOLDEN_RATIO;
b += JHASH_GOLDEN_RATIO;
c += rnd;
__jhash_mix(a, b, c);
a += raddr->s6_addr32[3];
b += (u32) rport;
__jhash_mix(a, b, c);
return c & (TCP_SYNQ_HSIZE - 1);
}
static struct request_sock *tcp_v6_search_req(const struct sock *sk,
struct request_sock ***prevp,
__u16 rport,
struct in6_addr *raddr,
struct in6_addr *laddr,
int iif)
{
const struct inet_connection_sock *icsk = inet_csk(sk);
struct listen_sock *lopt = icsk->icsk_accept_queue.listen_opt;
struct request_sock *req, **prev;
for (prev = &lopt->syn_table[tcp_v6_synq_hash(raddr, rport, lopt->hash_rnd)];
(req = *prev) != NULL;
prev = &req->dl_next) {
const struct tcp6_request_sock *treq = tcp6_rsk(req);
if (inet_rsk(req)->rmt_port == rport &&
req->rsk_ops->family == AF_INET6 &&
ipv6_addr_equal(&treq->rmt_addr, raddr) &&
ipv6_addr_equal(&treq->loc_addr, laddr) &&
(!treq->iif || treq->iif == iif)) {
BUG_TRAP(req->sk == NULL);
*prevp = prev;
return req;
}
}
return NULL;
}
static __inline__ u16 tcp_v6_check(struct tcphdr *th, int len,
struct in6_addr *saddr,
struct in6_addr *daddr,
......@@ -662,8 +609,8 @@ static void tcp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
if (sock_owned_by_user(sk))
goto out;
req = tcp_v6_search_req(sk, &prev, th->dest, &hdr->daddr,
&hdr->saddr, inet6_iif(skb));
req = inet6_csk_search_req(sk, &prev, th->dest, &hdr->daddr,
&hdr->saddr, inet6_iif(skb));
if (!req)
goto out;
......@@ -978,8 +925,9 @@ static struct sock *tcp_v6_hnd_req(struct sock *sk,struct sk_buff *skb)
struct sock *nsk;
/* Find possible connection requests. */
req = tcp_v6_search_req(sk, &prev, th->source, &skb->nh.ipv6h->saddr,
&skb->nh.ipv6h->daddr, inet6_iif(skb));
req = inet6_csk_search_req(sk, &prev, th->source,
&skb->nh.ipv6h->saddr,
&skb->nh.ipv6h->daddr, inet6_iif(skb));
if (req)
return tcp_check_req(sk, skb, req, prev);
......@@ -1003,17 +951,6 @@ static struct sock *tcp_v6_hnd_req(struct sock *sk,struct sk_buff *skb)
return sk;
}
static void tcp_v6_synq_add(struct sock *sk, struct request_sock *req)
{
struct inet_connection_sock *icsk = inet_csk(sk);
struct listen_sock *lopt = icsk->icsk_accept_queue.listen_opt;
const u32 h = tcp_v6_synq_hash(&tcp6_rsk(req)->rmt_addr, inet_rsk(req)->rmt_port, lopt->hash_rnd);
reqsk_queue_hash_req(&icsk->icsk_accept_queue, h, req, TCP_TIMEOUT_INIT);
inet_csk_reqsk_queue_added(sk, TCP_TIMEOUT_INIT);
}
/* FIXME: this is substantially similar to the ipv4 code.
* Can some kind of merge be done? -- erics
*/
......@@ -1083,8 +1020,7 @@ static int tcp_v6_conn_request(struct sock *sk, struct sk_buff *skb)
if (tcp_v6_send_synack(sk, req, NULL))
goto drop;
tcp_v6_synq_add(sk, req);
inet6_csk_reqsk_queue_hash_add(sk, req, TCP_TIMEOUT_INIT);
return 0;
drop:
......
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