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Diffstat (limited to 'net/dccp/ipv4.c')
-rw-r--r--net/dccp/ipv4.c80
1 files changed, 48 insertions, 32 deletions
diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c
index 474075adbde4..b348dd70c685 100644
--- a/net/dccp/ipv4.c
+++ b/net/dccp/ipv4.c
@@ -32,11 +32,10 @@
#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;
int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
{
@@ -212,8 +211,9 @@ static void dccp_v4_err(struct sk_buff *skb, u32 info)
return;
}
- sk = inet_lookup(&init_net, &dccp_hashinfo, iph->daddr, dh->dccph_dport,
- iph->saddr, dh->dccph_sport, inet_iif(skb));
+ sk = inet_lookup(dev_net(skb->dev), &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);
return;
@@ -430,7 +430,7 @@ static struct sock *dccp_v4_hnd_req(struct sock *sk, struct sk_buff *skb)
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));
@@ -446,11 +446,11 @@ static struct sock *dccp_v4_hnd_req(struct sock *sk, struct sk_buff *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,
@@ -463,7 +463,7 @@ static struct dst_entry* dccp_v4_route_skb(struct sock *sk,
};
security_skb_classify_flow(skb, &fl);
- if (ip_route_output_flow(&init_net, &rt, &fl, sk, 0)) {
+ if (ip_route_output_flow(net, &rt, &fl, sk, 0)) {
IP_INC_STATS_BH(IPSTATS_MIB_OUTNOROUTES);
return NULL;
}
@@ -471,15 +471,14 @@ static struct dst_entry* dccp_v4_route_skb(struct sock *sk,
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);
@@ -489,7 +488,6 @@ static int dccp_v4_send_response(struct sock *sk, struct request_sock *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);
@@ -507,19 +505,21 @@ static void dccp_v4_ctl_send_reset(struct sock *sk, struct sk_buff *rxskb)
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;
@@ -528,10 +528,10 @@ static void dccp_v4_ctl_send_reset(struct sock *sk, struct sk_buff *rxskb)
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);
@@ -564,8 +564,7 @@ int dccp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
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)) {
@@ -620,7 +619,7 @@ int dccp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
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);
@@ -811,7 +810,7 @@ static int dccp_v4_rcv(struct sk_buff *skb)
/* Step 2:
* Look up flow ID in table and get corresponding socket */
- sk = __inet_lookup(&init_net, &dccp_hashinfo,
+ sk = __inet_lookup(dev_net(skb->dst->dev), &dccp_hashinfo,
iph->saddr, dh->dccph_sport,
iph->daddr, dh->dccph_dport, inet_iif(skb));
/*
@@ -917,8 +916,6 @@ static struct timewait_sock_ops dccp_timewait_sock_ops = {
.twsk_obj_size = sizeof(struct inet_timewait_sock),
};
-DEFINE_PROTO_INUSE(dccp_v4)
-
static struct proto dccp_v4_prot = {
.name = "DCCP",
.owner = THIS_MODULE,
@@ -943,18 +940,18 @@ static struct proto dccp_v4_prot = {
.obj_size = sizeof(struct dccp_sock),
.rsk_prot = &dccp_request_sock_ops,
.twsk_prot = &dccp_timewait_sock_ops,
- .hashinfo = &dccp_hashinfo,
+ .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 = {
@@ -994,6 +991,25 @@ static struct inet_protosw dccp_v4_protosw = {
.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);
@@ -1007,13 +1023,12 @@ static int __init dccp_v4_init(void)
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:
@@ -1023,6 +1038,7 @@ 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);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.