97 lines
2.8 KiB
C
97 lines
2.8 KiB
C
|
/*
|
||
|
|
* 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);
|