ia64/linux-2.6.18-xen.hg

view net/ipv6/inet6_connection_sock.c @ 673:3161879fdf22

[IA64] xencomm: support XENMEM_add_to_physmap and XENMEM_remove_from_phsymap

support XENMEM_add_to_physmap and XENMEM_remove_from_phsymap.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
author Isaku Yamahata <yamahata@valinux.co.jp>
date Tue Sep 16 21:26:15 2008 +0900 (2008-09-16)
parents 831230e53067
children
line source
1 /*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Support for INET6 connection oriented protocols.
7 *
8 * Authors: See the TCPv6 sources
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or(at your option) any later version.
14 */
16 #include <linux/module.h>
17 #include <linux/in6.h>
18 #include <linux/ipv6.h>
19 #include <linux/jhash.h>
21 #include <net/addrconf.h>
22 #include <net/inet_connection_sock.h>
23 #include <net/inet_ecn.h>
24 #include <net/inet_hashtables.h>
25 #include <net/ip6_route.h>
26 #include <net/sock.h>
27 #include <net/inet6_connection_sock.h>
29 int inet6_csk_bind_conflict(const struct sock *sk,
30 const struct inet_bind_bucket *tb)
31 {
32 const struct sock *sk2;
33 const struct hlist_node *node;
35 /* We must walk the whole port owner list in this case. -DaveM */
36 sk_for_each_bound(sk2, node, &tb->owners) {
37 if (sk != sk2 &&
38 (!sk->sk_bound_dev_if ||
39 !sk2->sk_bound_dev_if ||
40 sk->sk_bound_dev_if == sk2->sk_bound_dev_if) &&
41 (!sk->sk_reuse || !sk2->sk_reuse ||
42 sk2->sk_state == TCP_LISTEN) &&
43 ipv6_rcv_saddr_equal(sk, sk2))
44 break;
45 }
47 return node != NULL;
48 }
50 EXPORT_SYMBOL_GPL(inet6_csk_bind_conflict);
52 /*
53 * request_sock (formerly open request) hash tables.
54 */
55 static u32 inet6_synq_hash(const struct in6_addr *raddr, const u16 rport,
56 const u32 rnd, const u16 synq_hsize)
57 {
58 u32 a = raddr->s6_addr32[0];
59 u32 b = raddr->s6_addr32[1];
60 u32 c = raddr->s6_addr32[2];
62 a += JHASH_GOLDEN_RATIO;
63 b += JHASH_GOLDEN_RATIO;
64 c += rnd;
65 __jhash_mix(a, b, c);
67 a += raddr->s6_addr32[3];
68 b += (u32)rport;
69 __jhash_mix(a, b, c);
71 return c & (synq_hsize - 1);
72 }
74 struct request_sock *inet6_csk_search_req(const struct sock *sk,
75 struct request_sock ***prevp,
76 const __u16 rport,
77 const struct in6_addr *raddr,
78 const struct in6_addr *laddr,
79 const int iif)
80 {
81 const struct inet_connection_sock *icsk = inet_csk(sk);
82 struct listen_sock *lopt = icsk->icsk_accept_queue.listen_opt;
83 struct request_sock *req, **prev;
85 for (prev = &lopt->syn_table[inet6_synq_hash(raddr, rport,
86 lopt->hash_rnd,
87 lopt->nr_table_entries)];
88 (req = *prev) != NULL;
89 prev = &req->dl_next) {
90 const struct inet6_request_sock *treq = inet6_rsk(req);
92 if (inet_rsk(req)->rmt_port == rport &&
93 req->rsk_ops->family == AF_INET6 &&
94 ipv6_addr_equal(&treq->rmt_addr, raddr) &&
95 ipv6_addr_equal(&treq->loc_addr, laddr) &&
96 (!treq->iif || treq->iif == iif)) {
97 BUG_TRAP(req->sk == NULL);
98 *prevp = prev;
99 return req;
100 }
101 }
103 return NULL;
104 }
106 EXPORT_SYMBOL_GPL(inet6_csk_search_req);
108 void inet6_csk_reqsk_queue_hash_add(struct sock *sk,
109 struct request_sock *req,
110 const unsigned long timeout)
111 {
112 struct inet_connection_sock *icsk = inet_csk(sk);
113 struct listen_sock *lopt = icsk->icsk_accept_queue.listen_opt;
114 const u32 h = inet6_synq_hash(&inet6_rsk(req)->rmt_addr,
115 inet_rsk(req)->rmt_port,
116 lopt->hash_rnd, lopt->nr_table_entries);
118 reqsk_queue_hash_req(&icsk->icsk_accept_queue, h, req, timeout);
119 inet_csk_reqsk_queue_added(sk, timeout);
120 }
122 EXPORT_SYMBOL_GPL(inet6_csk_reqsk_queue_hash_add);
124 void inet6_csk_addr2sockaddr(struct sock *sk, struct sockaddr * uaddr)
125 {
126 struct ipv6_pinfo *np = inet6_sk(sk);
127 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) uaddr;
129 sin6->sin6_family = AF_INET6;
130 ipv6_addr_copy(&sin6->sin6_addr, &np->daddr);
131 sin6->sin6_port = inet_sk(sk)->dport;
132 /* We do not store received flowlabel for TCP */
133 sin6->sin6_flowinfo = 0;
134 sin6->sin6_scope_id = 0;
135 if (sk->sk_bound_dev_if &&
136 ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
137 sin6->sin6_scope_id = sk->sk_bound_dev_if;
138 }
140 EXPORT_SYMBOL_GPL(inet6_csk_addr2sockaddr);
142 int inet6_csk_xmit(struct sk_buff *skb, int ipfragok)
143 {
144 struct sock *sk = skb->sk;
145 struct inet_sock *inet = inet_sk(sk);
146 struct ipv6_pinfo *np = inet6_sk(sk);
147 struct flowi fl;
148 struct dst_entry *dst;
149 struct in6_addr *final_p = NULL, final;
151 memset(&fl, 0, sizeof(fl));
152 fl.proto = sk->sk_protocol;
153 ipv6_addr_copy(&fl.fl6_dst, &np->daddr);
154 ipv6_addr_copy(&fl.fl6_src, &np->saddr);
155 fl.fl6_flowlabel = np->flow_label;
156 IP6_ECN_flow_xmit(sk, fl.fl6_flowlabel);
157 fl.oif = sk->sk_bound_dev_if;
158 fl.fl_ip_sport = inet->sport;
159 fl.fl_ip_dport = inet->dport;
161 if (np->opt && np->opt->srcrt) {
162 struct rt0_hdr *rt0 = (struct rt0_hdr *)np->opt->srcrt;
163 ipv6_addr_copy(&final, &fl.fl6_dst);
164 ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
165 final_p = &final;
166 }
168 dst = __sk_dst_check(sk, np->dst_cookie);
170 if (dst == NULL) {
171 int err = ip6_dst_lookup(sk, &dst, &fl);
173 if (err) {
174 sk->sk_err_soft = -err;
175 kfree_skb(skb);
176 return err;
177 }
179 if (final_p)
180 ipv6_addr_copy(&fl.fl6_dst, final_p);
182 if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0) {
183 sk->sk_route_caps = 0;
184 kfree_skb(skb);
185 return err;
186 }
188 __ip6_dst_store(sk, dst, NULL);
189 }
191 skb->dst = dst_clone(dst);
193 /* Restore final destination back after routing done */
194 ipv6_addr_copy(&fl.fl6_dst, &np->daddr);
196 return ip6_xmit(sk, skb, &fl, np->opt, 0);
197 }
199 EXPORT_SYMBOL_GPL(inet6_csk_xmit);