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[IPV6]: Generalise some functions 

Using sk->sk_protocol instead of IPPROTO_TCP.

Will be used by DCCPv6 in the next changesets.

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 23:22:54 -08:00 committed by David S. Miller
parent 830a1e5c21
commit b9750ce13c
5 changed files with 173 additions and 150 deletions
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2
include/linux/ipv6.h
View File

@ -297,6 +297,8 @@ struct tcp6_sock {
struct ipv6_pinfo inet6;
};
extern int inet6_sk_rebuild_header(struct sock *sk);
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
static inline struct ipv6_pinfo * inet6_sk(const struct sock *__sk)
{

13
include/net/inet6_connection_sock.h
View File

@ -15,8 +15,15 @@
#include <linux/types.h>
struct sock;
struct in6_addr;
struct inet_bind_bucket;
struct request_sock;
struct sk_buff;
struct sock;
struct sockaddr;
extern int inet6_csk_bind_conflict(const struct sock *sk,
const struct inet_bind_bucket *tb);
extern struct request_sock *inet6_csk_search_req(const struct sock *sk,
struct request_sock ***prevp,
@ -28,4 +35,8 @@ extern struct request_sock *inet6_csk_search_req(const struct sock *sk,
extern void inet6_csk_reqsk_queue_hash_add(struct sock *sk,
struct request_sock *req,
const unsigned long timeout);
extern void inet6_csk_addr2sockaddr(struct sock *sk, struct sockaddr *uaddr);
extern int inet6_csk_xmit(struct sk_buff *skb, int ipfragok);
#endif /* _INET6_CONNECTION_SOCK_H */

52
net/ipv6/af_inet6.c
View File

@ -609,6 +609,58 @@ inet6_unregister_protosw(struct inet_protosw *p)
}
}
int inet6_sk_rebuild_header(struct sock *sk)
{
int err;
struct dst_entry *dst;
struct ipv6_pinfo *np = inet6_sk(sk);
dst = __sk_dst_check(sk, np->dst_cookie);
if (dst == NULL) {
struct inet_sock *inet = inet_sk(sk);
struct in6_addr *final_p = NULL, final;
struct flowi fl;
memset(&fl, 0, sizeof(fl));
fl.proto = sk->sk_protocol;
ipv6_addr_copy(&fl.fl6_dst, &np->daddr);
ipv6_addr_copy(&fl.fl6_src, &np->saddr);
fl.fl6_flowlabel = np->flow_label;
fl.oif = sk->sk_bound_dev_if;
fl.fl_ip_dport = inet->dport;
fl.fl_ip_sport = inet->sport;
if (np->opt && np->opt->srcrt) {
struct rt0_hdr *rt0 = (struct rt0_hdr *) np->opt->srcrt;
ipv6_addr_copy(&final, &fl.fl6_dst);
ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
final_p = &final;
}
err = ip6_dst_lookup(sk, &dst, &fl);
if (err) {
sk->sk_route_caps = 0;
return err;
}
if (final_p)
ipv6_addr_copy(&fl.fl6_dst, final_p);
if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0) {
sk->sk_err_soft = -err;
return err;
}
ip6_dst_store(sk, dst, NULL);
sk->sk_route_caps = dst->dev->features &
~(NETIF_F_IP_CSUM | NETIF_F_TSO);
}
return 0;
}
EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header);
int
snmp6_mib_init(void *ptr[2], size_t mibsize, size_t mibalign)
{

103
net/ipv6/inet6_connection_sock.c
View File

@ -21,8 +21,34 @@
#include <net/addrconf.h>
#include <net/inet_connection_sock.h>
#include <net/inet_ecn.h>
#include <net/inet_hashtables.h>
#include <net/ip6_route.h>
#include <net/sock.h>
int inet6_csk_bind_conflict(const struct sock *sk,
const struct inet_bind_bucket *tb)
{
const struct sock *sk2;
const struct hlist_node *node;
/* We must walk the whole port owner list in this case. -DaveM */
sk_for_each_bound(sk2, node, &tb->owners) {
if (sk != sk2 &&
(!sk->sk_bound_dev_if ||
!sk2->sk_bound_dev_if ||
sk->sk_bound_dev_if == sk2->sk_bound_dev_if) &&
(!sk->sk_reuse || !sk2->sk_reuse ||
sk2->sk_state == TCP_LISTEN) &&
ipv6_rcv_saddr_equal(sk, sk2))
break;
}
return node != NULL;
}
EXPORT_SYMBOL_GPL(inet6_csk_bind_conflict);
/*
* request_sock (formerly open request) hash tables.
*/
@ -94,3 +120,80 @@ void inet6_csk_reqsk_queue_hash_add(struct sock *sk,
}
EXPORT_SYMBOL_GPL(inet6_csk_reqsk_queue_hash_add);
void inet6_csk_addr2sockaddr(struct sock *sk, struct sockaddr * uaddr)
{
struct ipv6_pinfo *np = inet6_sk(sk);
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) uaddr;
sin6->sin6_family = AF_INET6;
ipv6_addr_copy(&sin6->sin6_addr, &np->daddr);
sin6->sin6_port = inet_sk(sk)->dport;
/* We do not store received flowlabel for TCP */
sin6->sin6_flowinfo = 0;
sin6->sin6_scope_id = 0;
if (sk->sk_bound_dev_if &&
ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
sin6->sin6_scope_id = sk->sk_bound_dev_if;
}
EXPORT_SYMBOL_GPL(inet6_csk_addr2sockaddr);
int inet6_csk_xmit(struct sk_buff *skb, int ipfragok)
{
struct sock *sk = skb->sk;
struct inet_sock *inet = inet_sk(sk);
struct ipv6_pinfo *np = inet6_sk(sk);
struct flowi fl;
struct dst_entry *dst;
struct in6_addr *final_p = NULL, final;
memset(&fl, 0, sizeof(fl));
fl.proto = sk->sk_protocol;
ipv6_addr_copy(&fl.fl6_dst, &np->daddr);
ipv6_addr_copy(&fl.fl6_src, &np->saddr);
fl.fl6_flowlabel = np->flow_label;
IP6_ECN_flow_xmit(sk, fl.fl6_flowlabel);
fl.oif = sk->sk_bound_dev_if;
fl.fl_ip_sport = inet->sport;
fl.fl_ip_dport = inet->dport;
if (np->opt && np->opt->srcrt) {
struct rt0_hdr *rt0 = (struct rt0_hdr *)np->opt->srcrt;
ipv6_addr_copy(&final, &fl.fl6_dst);
ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
final_p = &final;
}
dst = __sk_dst_check(sk, np->dst_cookie);
if (dst == NULL) {
int err = ip6_dst_lookup(sk, &dst, &fl);
if (err) {
sk->sk_err_soft = -err;
return err;
}
if (final_p)
ipv6_addr_copy(&fl.fl6_dst, final_p);
if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0) {
sk->sk_route_caps = 0;
return err;
}
ip6_dst_store(sk, dst, NULL);
sk->sk_route_caps = dst->dev->features &
~(NETIF_F_IP_CSUM | NETIF_F_TSO);
}
skb->dst = dst_clone(dst);
/* Restore final destination back after routing done */
ipv6_addr_copy(&fl.fl6_dst, &np->daddr);
return ip6_xmit(sk, skb, &fl, np->opt, 0);
}
EXPORT_SYMBOL_GPL(inet6_csk_xmit);

153
net/ipv6/tcp_ipv6.c
View File

@ -72,32 +72,10 @@ static void tcp_v6_send_check(struct sock *sk, int len,
struct sk_buff *skb);
static int tcp_v6_do_rcv(struct sock *sk, struct sk_buff *skb);
static int tcp_v6_xmit(struct sk_buff *skb, int ipfragok);
static struct inet_connection_sock_af_ops ipv6_mapped;
static struct inet_connection_sock_af_ops ipv6_specific;
int inet6_csk_bind_conflict(const struct sock *sk,
const struct inet_bind_bucket *tb)
{
const struct sock *sk2;
const struct hlist_node *node;
/* We must walk the whole port owner list in this case. -DaveM */
sk_for_each_bound(sk2, node, &tb->owners) {
if (sk != sk2 &&
(!sk->sk_bound_dev_if ||
!sk2->sk_bound_dev_if ||
sk->sk_bound_dev_if == sk2->sk_bound_dev_if) &&
(!sk->sk_reuse || !sk2->sk_reuse ||
sk2->sk_state == TCP_LISTEN) &&
ipv6_rcv_saddr_equal(sk, sk2))
break;
}
return node != NULL;
}
static int tcp_v6_get_port(struct sock *sk, unsigned short snum)
{
return inet_csk_get_port(&tcp_hashinfo, sk, snum,
@ -1500,129 +1478,6 @@ do_time_wait:
goto discard_it;
}
static int tcp_v6_rebuild_header(struct sock *sk)
{
int err;
struct dst_entry *dst;
struct ipv6_pinfo *np = inet6_sk(sk);
dst = __sk_dst_check(sk, np->dst_cookie);
if (dst == NULL) {
struct inet_sock *inet = inet_sk(sk);
struct in6_addr *final_p = NULL, final;
struct flowi fl;
memset(&fl, 0, sizeof(fl));
fl.proto = IPPROTO_TCP;
ipv6_addr_copy(&fl.fl6_dst, &np->daddr);
ipv6_addr_copy(&fl.fl6_src, &np->saddr);
fl.fl6_flowlabel = np->flow_label;
fl.oif = sk->sk_bound_dev_if;
fl.fl_ip_dport = inet->dport;
fl.fl_ip_sport = inet->sport;
if (np->opt && np->opt->srcrt) {
struct rt0_hdr *rt0 = (struct rt0_hdr *) np->opt->srcrt;
ipv6_addr_copy(&final, &fl.fl6_dst);
ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
final_p = &final;
}
err = ip6_dst_lookup(sk, &dst, &fl);
if (err) {
sk->sk_route_caps = 0;
return err;
}
if (final_p)
ipv6_addr_copy(&fl.fl6_dst, final_p);
if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0) {
sk->sk_err_soft = -err;
return err;
}
ip6_dst_store(sk, dst, NULL);
sk->sk_route_caps = dst->dev->features &
~(NETIF_F_IP_CSUM | NETIF_F_TSO);
}
return 0;
}
static int tcp_v6_xmit(struct sk_buff *skb, int ipfragok)
{
struct sock *sk = skb->sk;
struct inet_sock *inet = inet_sk(sk);
struct ipv6_pinfo *np = inet6_sk(sk);
struct flowi fl;
struct dst_entry *dst;
struct in6_addr *final_p = NULL, final;
memset(&fl, 0, sizeof(fl));
fl.proto = IPPROTO_TCP;
ipv6_addr_copy(&fl.fl6_dst, &np->daddr);
ipv6_addr_copy(&fl.fl6_src, &np->saddr);
fl.fl6_flowlabel = np->flow_label;
IP6_ECN_flow_xmit(sk, fl.fl6_flowlabel);
fl.oif = sk->sk_bound_dev_if;
fl.fl_ip_sport = inet->sport;
fl.fl_ip_dport = inet->dport;
if (np->opt && np->opt->srcrt) {
struct rt0_hdr *rt0 = (struct rt0_hdr *) np->opt->srcrt;
ipv6_addr_copy(&final, &fl.fl6_dst);
ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
final_p = &final;
}
dst = __sk_dst_check(sk, np->dst_cookie);
if (dst == NULL) {
int err = ip6_dst_lookup(sk, &dst, &fl);
if (err) {
sk->sk_err_soft = -err;
return err;
}
if (final_p)
ipv6_addr_copy(&fl.fl6_dst, final_p);
if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0) {
sk->sk_route_caps = 0;
return err;
}
ip6_dst_store(sk, dst, NULL);
sk->sk_route_caps = dst->dev->features &
~(NETIF_F_IP_CSUM | NETIF_F_TSO);
}
skb->dst = dst_clone(dst);
/* Restore final destination back after routing done */
ipv6_addr_copy(&fl.fl6_dst, &np->daddr);
return ip6_xmit(sk, skb, &fl, np->opt, 0);
}
static void v6_addr2sockaddr(struct sock *sk, struct sockaddr * uaddr)
{
struct ipv6_pinfo *np = inet6_sk(sk);
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) uaddr;
sin6->sin6_family = AF_INET6;
ipv6_addr_copy(&sin6->sin6_addr, &np->daddr);
sin6->sin6_port = inet_sk(sk)->dport;
/* We do not store received flowlabel for TCP */
sin6->sin6_flowinfo = 0;
sin6->sin6_scope_id = 0;
if (sk->sk_bound_dev_if &&
ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
sin6->sin6_scope_id = sk->sk_bound_dev_if;
}
static int tcp_v6_remember_stamp(struct sock *sk)
{
/* Alas, not yet... */
@ -1630,9 +1485,9 @@ static int tcp_v6_remember_stamp(struct sock *sk)
}
static struct inet_connection_sock_af_ops ipv6_specific = {
.queue_xmit = tcp_v6_xmit,
.queue_xmit = inet6_csk_xmit,
.send_check = tcp_v6_send_check,
.rebuild_header = tcp_v6_rebuild_header,
.rebuild_header = inet6_sk_rebuild_header,
.conn_request = tcp_v6_conn_request,
.syn_recv_sock = tcp_v6_syn_recv_sock,
.remember_stamp = tcp_v6_remember_stamp,
@ -1640,7 +1495,7 @@ static struct inet_connection_sock_af_ops ipv6_specific = {
.setsockopt = ipv6_setsockopt,
.getsockopt = ipv6_getsockopt,
.addr2sockaddr = v6_addr2sockaddr,
.addr2sockaddr = inet6_csk_addr2sockaddr,
.sockaddr_len = sizeof(struct sockaddr_in6)
};
@ -1659,7 +1514,7 @@ static struct inet_connection_sock_af_ops ipv6_mapped = {
.setsockopt = ipv6_setsockopt,
.getsockopt = ipv6_getsockopt,
.addr2sockaddr = v6_addr2sockaddr,
.addr2sockaddr = inet6_csk_addr2sockaddr,
.sockaddr_len = sizeof(struct sockaddr_in6)
};