diff options
Diffstat (limited to 'net/dccp/ipv6.c')
| -rw-r--r-- | net/dccp/ipv6.c | 44 |
1 files changed, 40 insertions, 4 deletions
diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c index 904967bf2fe9..3c9f0836404f 100644 --- a/net/dccp/ipv6.c +++ b/net/dccp/ipv6.c @@ -33,6 +33,9 @@ #include "dccp.h" #include "ipv6.h" +/* Socket used for sending RSTs and ACKs */ +static struct socket *dccp_v6_ctl_socket; + static void dccp_v6_ctl_send_reset(struct sk_buff *skb); static void dccp_v6_reqsk_send_ack(struct sk_buff *skb, struct request_sock *req); @@ -568,7 +571,7 @@ static void dccp_v6_ctl_send_reset(struct sk_buff *rxskb) /* sk = NULL, but it is safe for now. RST socket required. */ if (!ip6_dst_lookup(NULL, &skb->dst, &fl)) { if (xfrm_lookup(&skb->dst, &fl, NULL, 0) >= 0) { - ip6_xmit(NULL, skb, &fl, NULL, 0); + ip6_xmit(dccp_v6_ctl_socket->sk, skb, &fl, NULL, 0); DCCP_INC_STATS_BH(DCCP_MIB_OUTSEGS); DCCP_INC_STATS_BH(DCCP_MIB_OUTRSTS); return; @@ -623,7 +626,7 @@ static void dccp_v6_ctl_send_ack(struct sk_buff *rxskb) if (!ip6_dst_lookup(NULL, &skb->dst, &fl)) { if (xfrm_lookup(&skb->dst, &fl, NULL, 0) >= 0) { - ip6_xmit(NULL, skb, &fl, NULL, 0); + ip6_xmit(dccp_v6_ctl_socket->sk, skb, &fl, NULL, 0); DCCP_INC_STATS_BH(DCCP_MIB_OUTSEGS); return; } @@ -1146,10 +1149,14 @@ static struct inet_connection_sock_af_ops dccp_ipv6_mapped = { */ static int dccp_v6_init_sock(struct sock *sk) { - int err = dccp_init_sock(sk); + static __u8 dccp_v6_ctl_sock_initialized; + int err = dccp_init_sock(sk, dccp_v6_ctl_sock_initialized); - if (err == 0) + if (err == 0) { + if (unlikely(!dccp_v6_ctl_sock_initialized)) + dccp_v6_ctl_sock_initialized = 1; inet_csk(sk)->icsk_af_ops = &dccp_ipv6_af_ops; + } return err; } @@ -1222,6 +1229,29 @@ static struct inet_protosw dccp_v6_protosw = { .flags = INET_PROTOSW_ICSK, }; +static char dccp_v6_ctl_socket_err_msg[] __initdata = + KERN_ERR "DCCP: Failed to create the control socket.\n"; + +static int __init dccp_v6_ctl_sock_init(void) +{ + int rc = sock_create_kern(PF_INET6, SOCK_DCCP, IPPROTO_DCCP, + &dccp_v6_ctl_socket); + if (rc < 0) + printk(dccp_v6_ctl_socket_err_msg); + else { + dccp_v6_ctl_socket->sk->sk_allocation = GFP_ATOMIC; + inet_sk(dccp_v6_ctl_socket->sk)->uc_ttl = -1; + + /* Unhash it so that IP input processing does not even + * see it, we do not wish this socket to see incoming + * packets. + */ + dccp_v6_ctl_socket->sk->sk_prot->unhash(dccp_v6_ctl_socket->sk); + } + + return rc; +} + static int __init dccp_v6_init(void) { int err = proto_register(&dccp_v6_prot, 1); @@ -1234,8 +1264,14 @@ static int __init dccp_v6_init(void) goto out_unregister_proto; inet6_register_protosw(&dccp_v6_protosw); + + if (dccp_v6_ctl_sock_init() != 0) + goto out_unregister_protosw; out: return err; +out_unregister_protosw: + inet6_del_protocol(&dccp_v6_protocol, IPPROTO_DCCP); + inet6_unregister_protosw(&dccp_v6_protosw); out_unregister_proto: proto_unregister(&dccp_v6_prot); goto out; |