#include "feat.h"
/*
- * This is the global socket data structure used for responding to
+ * The per-net dccp.v4_ctl_sk socket is used for responding to
* the Out-of-the-blue (OOTB) packets. A control sock will be created
* for this socket at the initialization time.
*/
-static struct socket *dccp_v4_ctl_socket;
-
-static int dccp_v4_get_port(struct sock *sk, const unsigned short snum)
-{
- return inet_csk_get_port(&dccp_hashinfo, sk, snum,
- inet_csk_bind_conflict);
-}
int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
{
static void dccp_v4_err(struct sk_buff *skb, u32 info)
{
const struct iphdr *iph = (struct iphdr *)skb->data;
- const struct dccp_hdr *dh = (struct dccp_hdr *)(skb->data +
- (iph->ihl << 2));
+ const u8 offset = iph->ihl << 2;
+ const struct dccp_hdr *dh = (struct dccp_hdr *)(skb->data + offset);
struct dccp_sock *dp;
struct inet_sock *inet;
const int type = icmp_hdr(skb)->type;
struct sock *sk;
__u64 seq;
int err;
+ struct net *net = dev_net(skb->dev);
- if (skb->len < (iph->ihl << 2) + 8) {
- ICMP_INC_STATS_BH(ICMP_MIB_INERRORS);
+ if (skb->len < offset + sizeof(*dh) ||
+ skb->len < offset + __dccp_basic_hdr_len(dh)) {
+ ICMP_INC_STATS_BH(net, ICMP_MIB_INERRORS);
return;
}
- sk = inet_lookup(&init_net, &dccp_hashinfo, iph->daddr, dh->dccph_dport,
- iph->saddr, dh->dccph_sport, inet_iif(skb));
+ sk = inet_lookup(net, &dccp_hashinfo,
+ iph->daddr, dh->dccph_dport,
+ iph->saddr, dh->dccph_sport, inet_iif(skb));
if (sk == NULL) {
- ICMP_INC_STATS_BH(ICMP_MIB_INERRORS);
+ ICMP_INC_STATS_BH(net, ICMP_MIB_INERRORS);
return;
}
* servers this needs to be solved differently.
*/
if (sock_owned_by_user(sk))
- NET_INC_STATS_BH(LINUX_MIB_LOCKDROPPEDICMPS);
+ NET_INC_STATS_BH(net, LINUX_MIB_LOCKDROPPEDICMPS);
if (sk->sk_state == DCCP_CLOSED)
goto out;
dp = dccp_sk(sk);
seq = dccp_hdr_seq(dh);
if ((1 << sk->sk_state) & ~(DCCPF_REQUESTING | DCCPF_LISTEN) &&
- !between48(seq, dp->dccps_swl, dp->dccps_swh)) {
- NET_INC_STATS_BH(LINUX_MIB_OUTOFWINDOWICMPS);
+ !between48(seq, dp->dccps_awl, dp->dccps_awh)) {
+ NET_INC_STATS_BH(net, LINUX_MIB_OUTOFWINDOWICMPS);
goto out;
}
* ICMPs are not backlogged, hence we cannot get an established
* socket here.
*/
- BUG_TRAP(!req->sk);
+ WARN_ON(req->sk);
if (seq != dccp_rsk(req)->dreq_iss) {
- NET_INC_STATS_BH(LINUX_MIB_OUTOFWINDOWICMPS);
+ NET_INC_STATS_BH(net, LINUX_MIB_OUTOFWINDOWICMPS);
goto out;
}
/*
dccp_sync_mss(newsk, dst_mtu(dst));
- __inet_hash_nolisten(&dccp_hashinfo, newsk);
- __inet_inherit_port(&dccp_hashinfo, sk, newsk);
+ __inet_hash_nolisten(newsk);
+ __inet_inherit_port(sk, newsk);
return newsk;
exit_overflow:
- NET_INC_STATS_BH(LINUX_MIB_LISTENOVERFLOWS);
+ NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENOVERFLOWS);
exit:
- NET_INC_STATS_BH(LINUX_MIB_LISTENDROPS);
+ NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENDROPS);
dst_release(dst);
return NULL;
}
if (req != NULL)
return dccp_check_req(sk, skb, req, prev);
- nsk = inet_lookup_established(&init_net, &dccp_hashinfo,
+ nsk = inet_lookup_established(sock_net(sk), &dccp_hashinfo,
iph->saddr, dh->dccph_sport,
iph->daddr, dh->dccph_dport,
inet_iif(skb));
return sk;
}
-static struct dst_entry* dccp_v4_route_skb(struct sock *sk,
+static struct dst_entry* dccp_v4_route_skb(struct net *net, struct sock *sk,
struct sk_buff *skb)
{
struct rtable *rt;
- struct flowi fl = { .oif = ((struct rtable *)skb->dst)->rt_iif,
+ struct flowi fl = { .oif = skb->rtable->rt_iif,
.nl_u = { .ip4_u =
{ .daddr = ip_hdr(skb)->saddr,
.saddr = ip_hdr(skb)->daddr,
};
security_skb_classify_flow(skb, &fl);
- if (ip_route_output_flow(&init_net, &rt, &fl, sk, 0)) {
- IP_INC_STATS_BH(IPSTATS_MIB_OUTNOROUTES);
+ if (ip_route_output_flow(net, &rt, &fl, sk, 0)) {
+ IP_INC_STATS_BH(net, IPSTATS_MIB_OUTNOROUTES);
return NULL;
}
return &rt->u.dst;
}
-static int dccp_v4_send_response(struct sock *sk, struct request_sock *req,
- struct dst_entry *dst)
+static int dccp_v4_send_response(struct sock *sk, struct request_sock *req)
{
int err = -1;
struct sk_buff *skb;
+ struct dst_entry *dst;
- /* First, grab a route. */
-
- if (dst == NULL && (dst = inet_csk_route_req(sk, req)) == NULL)
+ dst = inet_csk_route_req(sk, req);
+ if (dst == NULL)
goto out;
skb = dccp_make_response(sk, dst, req);
dh->dccph_checksum = dccp_v4_csum_finish(skb, ireq->loc_addr,
ireq->rmt_addr);
- memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
err = ip_build_and_send_pkt(skb, sk, ireq->loc_addr,
ireq->rmt_addr,
ireq->opt);
const struct iphdr *rxiph;
struct sk_buff *skb;
struct dst_entry *dst;
+ struct net *net = dev_net(rxskb->dst->dev);
+ struct sock *ctl_sk = net->dccp.v4_ctl_sk;
/* Never send a reset in response to a reset. */
if (dccp_hdr(rxskb)->dccph_type == DCCP_PKT_RESET)
return;
- if (((struct rtable *)rxskb->dst)->rt_type != RTN_LOCAL)
+ if (rxskb->rtable->rt_type != RTN_LOCAL)
return;
- dst = dccp_v4_route_skb(dccp_v4_ctl_socket->sk, rxskb);
+ dst = dccp_v4_route_skb(net, ctl_sk, rxskb);
if (dst == NULL)
return;
- skb = dccp_ctl_make_reset(dccp_v4_ctl_socket, rxskb);
+ skb = dccp_ctl_make_reset(ctl_sk, rxskb);
if (skb == NULL)
goto out;
rxiph->daddr);
skb->dst = dst_clone(dst);
- bh_lock_sock(dccp_v4_ctl_socket->sk);
- err = ip_build_and_send_pkt(skb, dccp_v4_ctl_socket->sk,
+ bh_lock_sock(ctl_sk);
+ err = ip_build_and_send_pkt(skb, ctl_sk,
rxiph->daddr, rxiph->saddr, NULL);
- bh_unlock_sock(dccp_v4_ctl_socket->sk);
+ bh_unlock_sock(ctl_sk);
if (net_xmit_eval(err) == 0) {
DCCP_INC_STATS_BH(DCCP_MIB_OUTSEGS);
struct dccp_skb_cb *dcb = DCCP_SKB_CB(skb);
/* Never answer to DCCP_PKT_REQUESTs send to broadcast or multicast */
- if (((struct rtable *)skb->dst)->rt_flags &
- (RTCF_BROADCAST | RTCF_MULTICAST))
+ if (skb->rtable->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))
return 0; /* discard, don't send a reset here */
if (dccp_bad_service_code(sk, service)) {
if (sk_acceptq_is_full(sk) && inet_csk_reqsk_queue_young(sk) > 1)
goto drop;
- req = reqsk_alloc(&dccp_request_sock_ops);
+ req = inet_reqsk_alloc(&dccp_request_sock_ops);
if (req == NULL)
goto drop;
ireq = inet_rsk(req);
ireq->loc_addr = ip_hdr(skb)->daddr;
ireq->rmt_addr = ip_hdr(skb)->saddr;
- ireq->opt = NULL;
/*
* Step 3: Process LISTEN state
dreq->dreq_iss = dccp_v4_init_sequence(skb);
dreq->dreq_service = service;
- if (dccp_v4_send_response(sk, req, NULL))
+ if (dccp_v4_send_response(sk, req))
goto drop_and_free;
inet_csk_reqsk_queue_hash_add(sk, req, DCCP_TIMEOUT_INIT);
* If P.type is not Data, Ack, or DataAck and P.X == 0 (the packet
* has short sequence numbers), drop packet and return
*/
- if (dh->dccph_type >= DCCP_PKT_DATA &&
- dh->dccph_type <= DCCP_PKT_DATAACK && dh->dccph_x == 0) {
+ if ((dh->dccph_type < DCCP_PKT_DATA ||
+ dh->dccph_type > DCCP_PKT_DATAACK) && dh->dccph_x == 0) {
DCCP_WARN("P.type (%s) not Data || [Data]Ack, while P.X == 0\n",
dccp_packet_name(dh->dccph_type));
return 1;
/* Step 2:
* Look up flow ID in table and get corresponding socket */
- sk = __inet_lookup(&init_net, &dccp_hashinfo,
- iph->saddr, dh->dccph_sport,
- iph->daddr, dh->dccph_dport, inet_iif(skb));
+ sk = __inet_lookup_skb(&dccp_hashinfo, skb,
+ dh->dccph_sport, dh->dccph_dport);
/*
* Step 2:
* If no socket ...
.getsockopt = ip_getsockopt,
.addr2sockaddr = inet_csk_addr2sockaddr,
.sockaddr_len = sizeof(struct sockaddr_in),
+ .bind_conflict = inet_csk_bind_conflict,
#ifdef CONFIG_COMPAT
.compat_setsockopt = compat_ip_setsockopt,
.compat_getsockopt = compat_ip_getsockopt,
.twsk_obj_size = sizeof(struct inet_timewait_sock),
};
-DEFINE_PROTO_INUSE(dccp_v4)
-
static struct proto dccp_v4_prot = {
.name = "DCCP",
.owner = THIS_MODULE,
.sendmsg = dccp_sendmsg,
.recvmsg = dccp_recvmsg,
.backlog_rcv = dccp_v4_do_rcv,
- .hash = dccp_hash,
- .unhash = dccp_unhash,
+ .hash = inet_hash,
+ .unhash = inet_unhash,
.accept = inet_csk_accept,
- .get_port = dccp_v4_get_port,
+ .get_port = inet_csk_get_port,
.shutdown = dccp_shutdown,
.destroy = dccp_destroy_sock,
.orphan_count = &dccp_orphan_count,
.obj_size = sizeof(struct dccp_sock),
.rsk_prot = &dccp_request_sock_ops,
.twsk_prot = &dccp_timewait_sock_ops,
+ .h.hashinfo = &dccp_hashinfo,
#ifdef CONFIG_COMPAT
.compat_setsockopt = compat_dccp_setsockopt,
.compat_getsockopt = compat_dccp_getsockopt,
#endif
- REF_PROTO_INUSE(dccp_v4)
};
static struct net_protocol dccp_v4_protocol = {
.handler = dccp_v4_rcv,
.err_handler = dccp_v4_err,
.no_policy = 1,
+ .netns_ok = 1,
};
static const struct proto_ops inet_dccp_ops = {
.flags = INET_PROTOSW_ICSK,
};
+static int dccp_v4_init_net(struct net *net)
+{
+ int err;
+
+ err = inet_ctl_sock_create(&net->dccp.v4_ctl_sk, PF_INET,
+ SOCK_DCCP, IPPROTO_DCCP, net);
+ return err;
+}
+
+static void dccp_v4_exit_net(struct net *net)
+{
+ inet_ctl_sock_destroy(net->dccp.v4_ctl_sk);
+}
+
+static struct pernet_operations dccp_v4_ops = {
+ .init = dccp_v4_init_net,
+ .exit = dccp_v4_exit_net,
+};
+
static int __init dccp_v4_init(void)
{
int err = proto_register(&dccp_v4_prot, 1);
inet_register_protosw(&dccp_v4_protosw);
- err = inet_csk_ctl_sock_create(&dccp_v4_ctl_socket, PF_INET,
- SOCK_DCCP, IPPROTO_DCCP);
+ err = register_pernet_subsys(&dccp_v4_ops);
if (err)
- goto out_unregister_protosw;
+ goto out_destroy_ctl_sock;
out:
return err;
-out_unregister_protosw:
+out_destroy_ctl_sock:
inet_unregister_protosw(&dccp_v4_protosw);
inet_del_protocol(&dccp_v4_protocol, IPPROTO_DCCP);
out_proto_unregister:
static void __exit dccp_v4_exit(void)
{
+ unregister_pernet_subsys(&dccp_v4_ops);
inet_unregister_protosw(&dccp_v4_protosw);
inet_del_protocol(&dccp_v4_protocol, IPPROTO_DCCP);
proto_unregister(&dccp_v4_prot);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff