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-rw-r--r--net/dccp/dccp.h9
-rw-r--r--net/dccp/ipv4.c36
-rw-r--r--net/dccp/ipv6.c24
-rw-r--r--net/dccp/minisocks.c1
-rw-r--r--net/dccp/proto.c53
5 files changed, 91 insertions, 32 deletions
diff --git a/net/dccp/dccp.h b/net/dccp/dccp.h
index 5183e627468d..7dfc00c9fb32 100644
--- a/net/dccp/dccp.h
+++ b/net/dccp/dccp.h
@@ -136,11 +136,6 @@ static inline int between48(const u64 seq1, const u64 seq2, const u64 seq3)
return (seq3 << 16) - (seq2 << 16) >= (seq1 << 16) - (seq2 << 16);
}
-static inline u64 max48(const u64 seq1, const u64 seq2)
-{
- return after48(seq1, seq2) ? seq1 : seq2;
-}
-
/**
* dccp_loss_count - Approximate the number of lost data packets in a burst loss
* @s1: last known sequence number before the loss ('hole')
@@ -298,8 +293,8 @@ int dccp_setsockopt(struct sock *sk, int level, int optname,
sockptr_t optval, unsigned int optlen);
int dccp_ioctl(struct sock *sk, int cmd, unsigned long arg);
int dccp_sendmsg(struct sock *sk, struct msghdr *msg, size_t size);
-int dccp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int nonblock,
- int flags, int *addr_len);
+int dccp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int flags,
+ int *addr_len);
void dccp_shutdown(struct sock *sk, int how);
int inet_dccp_listen(struct socket *sock, int backlog);
__poll_t dccp_poll(struct file *file, struct socket *sock,
diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c
index 0ea29270d7e5..713b7b8dad7e 100644
--- a/net/dccp/ipv4.c
+++ b/net/dccp/ipv4.c
@@ -45,10 +45,11 @@ static unsigned int dccp_v4_pernet_id __read_mostly;
int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
{
const struct sockaddr_in *usin = (struct sockaddr_in *)uaddr;
+ struct inet_bind_hashbucket *prev_addr_hashbucket = NULL;
+ __be32 daddr, nexthop, prev_sk_rcv_saddr;
struct inet_sock *inet = inet_sk(sk);
struct dccp_sock *dp = dccp_sk(sk);
__be16 orig_sport, orig_dport;
- __be32 daddr, nexthop;
struct flowi4 *fl4;
struct rtable *rt;
int err;
@@ -76,9 +77,8 @@ int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
orig_dport = usin->sin_port;
fl4 = &inet->cork.fl.u.ip4;
rt = ip_route_connect(fl4, nexthop, inet->inet_saddr,
- RT_CONN_FLAGS(sk), sk->sk_bound_dev_if,
- IPPROTO_DCCP,
- orig_sport, orig_dport, sk);
+ sk->sk_bound_dev_if, IPPROTO_DCCP, orig_sport,
+ orig_dport, sk);
if (IS_ERR(rt))
return PTR_ERR(rt);
@@ -90,9 +90,29 @@ int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
if (inet_opt == NULL || !inet_opt->opt.srr)
daddr = fl4->daddr;
- if (inet->inet_saddr == 0)
+ if (inet->inet_saddr == 0) {
+ if (inet_csk(sk)->icsk_bind2_hash) {
+ prev_addr_hashbucket =
+ inet_bhashfn_portaddr(&dccp_hashinfo, sk,
+ sock_net(sk),
+ inet->inet_num);
+ prev_sk_rcv_saddr = sk->sk_rcv_saddr;
+ }
inet->inet_saddr = fl4->saddr;
+ }
+
sk_rcv_saddr_set(sk, inet->inet_saddr);
+
+ if (prev_addr_hashbucket) {
+ err = inet_bhash2_update_saddr(prev_addr_hashbucket, sk);
+ if (err) {
+ inet->inet_saddr = 0;
+ sk_rcv_saddr_set(sk, prev_sk_rcv_saddr);
+ ip_rt_put(rt);
+ return err;
+ }
+ }
+
inet->inet_dport = usin->sin_port;
sk_daddr_set(sk, daddr);
@@ -124,7 +144,7 @@ int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
inet->inet_daddr,
inet->inet_sport,
inet->inet_dport);
- inet->inet_id = prandom_u32();
+ inet->inet_id = get_random_u16();
err = dccp_connect(sk);
rt = NULL;
@@ -423,7 +443,7 @@ struct sock *dccp_v4_request_recv_sock(const struct sock *sk,
RCU_INIT_POINTER(newinet->inet_opt, rcu_dereference(ireq->ireq_opt));
newinet->mc_index = inet_iif(skb);
newinet->mc_ttl = ip_hdr(skb)->ttl;
- newinet->inet_id = prandom_u32();
+ newinet->inet_id = get_random_u16();
if (dst == NULL && (dst = inet_csk_route_child_sock(sk, newsk, req)) == NULL)
goto put_and_exit;
@@ -629,7 +649,7 @@ int dccp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
sk_daddr_set(req_to_sk(req), ip_hdr(skb)->saddr);
ireq->ir_mark = inet_request_mark(sk, skb);
ireq->ireq_family = AF_INET;
- ireq->ir_iif = sk->sk_bound_dev_if;
+ ireq->ir_iif = READ_ONCE(sk->sk_bound_dev_if);
/*
* Step 3: Process LISTEN state
diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c
index fa663518fa0e..e57b43006074 100644
--- a/net/dccp/ipv6.c
+++ b/net/dccp/ipv6.c
@@ -374,10 +374,10 @@ static int dccp_v6_conn_request(struct sock *sk, struct sk_buff *skb)
refcount_inc(&skb->users);
ireq->pktopts = skb;
}
- ireq->ir_iif = sk->sk_bound_dev_if;
+ ireq->ir_iif = READ_ONCE(sk->sk_bound_dev_if);
/* So that link locals have meaning */
- if (!sk->sk_bound_dev_if &&
+ if (!ireq->ir_iif &&
ipv6_addr_type(&ireq->ir_v6_rmt_addr) & IPV6_ADDR_LINKLOCAL)
ireq->ir_iif = inet6_iif(skb);
@@ -892,7 +892,7 @@ static int dccp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
SOCK_DEBUG(sk, "connect: ipv4 mapped\n");
- if (__ipv6_only_sock(sk))
+ if (ipv6_only_sock(sk))
return -ENETUNREACH;
sin.sin_family = AF_INET;
@@ -934,8 +934,26 @@ static int dccp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
}
if (saddr == NULL) {
+ struct inet_bind_hashbucket *prev_addr_hashbucket = NULL;
+ struct in6_addr prev_v6_rcv_saddr;
+
+ if (icsk->icsk_bind2_hash) {
+ prev_addr_hashbucket = inet_bhashfn_portaddr(&dccp_hashinfo,
+ sk, sock_net(sk),
+ inet->inet_num);
+ prev_v6_rcv_saddr = sk->sk_v6_rcv_saddr;
+ }
+
saddr = &fl6.saddr;
sk->sk_v6_rcv_saddr = *saddr;
+
+ if (prev_addr_hashbucket) {
+ err = inet_bhash2_update_saddr(prev_addr_hashbucket, sk);
+ if (err) {
+ sk->sk_v6_rcv_saddr = prev_v6_rcv_saddr;
+ goto failure;
+ }
+ }
}
/* set the source address */
diff --git a/net/dccp/minisocks.c b/net/dccp/minisocks.c
index 91e7a2202697..64d805b27add 100644
--- a/net/dccp/minisocks.c
+++ b/net/dccp/minisocks.c
@@ -22,6 +22,7 @@
#include "feat.h"
struct inet_timewait_death_row dccp_death_row = {
+ .tw_refcount = REFCOUNT_INIT(1),
.sysctl_max_tw_buckets = NR_FILE * 2,
.hashinfo = &dccp_hashinfo,
};
diff --git a/net/dccp/proto.c b/net/dccp/proto.c
index a976b4d29892..c548ca3e9b0e 100644
--- a/net/dccp/proto.c
+++ b/net/dccp/proto.c
@@ -736,11 +736,6 @@ int dccp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
lock_sock(sk);
- if (dccp_qpolicy_full(sk)) {
- rc = -EAGAIN;
- goto out_release;
- }
-
timeo = sock_sndtimeo(sk, noblock);
/*
@@ -759,6 +754,11 @@ int dccp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
if (skb == NULL)
goto out_release;
+ if (dccp_qpolicy_full(sk)) {
+ rc = -EAGAIN;
+ goto out_discard;
+ }
+
if (sk->sk_state == DCCP_CLOSED) {
rc = -ENOTCONN;
goto out_discard;
@@ -791,8 +791,8 @@ out_discard:
EXPORT_SYMBOL_GPL(dccp_sendmsg);
-int dccp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int nonblock,
- int flags, int *addr_len)
+int dccp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int flags,
+ int *addr_len)
{
const struct dccp_hdr *dh;
long timeo;
@@ -804,7 +804,7 @@ int dccp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int nonblock,
goto out;
}
- timeo = sock_rcvtimeo(sk, nonblock);
+ timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
do {
struct sk_buff *skb = skb_peek(&sk->sk_receive_queue);
@@ -1110,7 +1110,6 @@ static int __init dccp_init(void)
BUILD_BUG_ON(sizeof(struct dccp_skb_cb) >
sizeof_field(struct sk_buff, cb));
- inet_hashinfo_init(&dccp_hashinfo);
rc = inet_hashinfo2_init_mod(&dccp_hashinfo);
if (rc)
goto out_fail;
@@ -1121,6 +1120,12 @@ static int __init dccp_init(void)
SLAB_HWCACHE_ALIGN | SLAB_ACCOUNT, NULL);
if (!dccp_hashinfo.bind_bucket_cachep)
goto out_free_hashinfo2;
+ dccp_hashinfo.bind2_bucket_cachep =
+ kmem_cache_create("dccp_bind2_bucket",
+ sizeof(struct inet_bind2_bucket), 0,
+ SLAB_HWCACHE_ALIGN | SLAB_ACCOUNT, NULL);
+ if (!dccp_hashinfo.bind2_bucket_cachep)
+ goto out_free_bind_bucket_cachep;
/*
* Size and allocate the main established and bind bucket
@@ -1151,7 +1156,7 @@ static int __init dccp_init(void)
if (!dccp_hashinfo.ehash) {
DCCP_CRIT("Failed to allocate DCCP established hash table");
- goto out_free_bind_bucket_cachep;
+ goto out_free_bind2_bucket_cachep;
}
for (i = 0; i <= dccp_hashinfo.ehash_mask; i++)
@@ -1177,14 +1182,26 @@ static int __init dccp_init(void)
goto out_free_dccp_locks;
}
+ dccp_hashinfo.bhash2 = (struct inet_bind_hashbucket *)
+ __get_free_pages(GFP_ATOMIC | __GFP_NOWARN, bhash_order);
+
+ if (!dccp_hashinfo.bhash2) {
+ DCCP_CRIT("Failed to allocate DCCP bind2 hash table");
+ goto out_free_dccp_bhash;
+ }
+
for (i = 0; i < dccp_hashinfo.bhash_size; i++) {
spin_lock_init(&dccp_hashinfo.bhash[i].lock);
INIT_HLIST_HEAD(&dccp_hashinfo.bhash[i].chain);
+ spin_lock_init(&dccp_hashinfo.bhash2[i].lock);
+ INIT_HLIST_HEAD(&dccp_hashinfo.bhash2[i].chain);
}
+ dccp_hashinfo.pernet = false;
+
rc = dccp_mib_init();
if (rc)
- goto out_free_dccp_bhash;
+ goto out_free_dccp_bhash2;
rc = dccp_ackvec_init();
if (rc)
@@ -1208,30 +1225,38 @@ out_ackvec_exit:
dccp_ackvec_exit();
out_free_dccp_mib:
dccp_mib_exit();
+out_free_dccp_bhash2:
+ free_pages((unsigned long)dccp_hashinfo.bhash2, bhash_order);
out_free_dccp_bhash:
free_pages((unsigned long)dccp_hashinfo.bhash, bhash_order);
out_free_dccp_locks:
inet_ehash_locks_free(&dccp_hashinfo);
out_free_dccp_ehash:
free_pages((unsigned long)dccp_hashinfo.ehash, ehash_order);
+out_free_bind2_bucket_cachep:
+ kmem_cache_destroy(dccp_hashinfo.bind2_bucket_cachep);
out_free_bind_bucket_cachep:
kmem_cache_destroy(dccp_hashinfo.bind_bucket_cachep);
out_free_hashinfo2:
inet_hashinfo2_free_mod(&dccp_hashinfo);
out_fail:
dccp_hashinfo.bhash = NULL;
+ dccp_hashinfo.bhash2 = NULL;
dccp_hashinfo.ehash = NULL;
dccp_hashinfo.bind_bucket_cachep = NULL;
+ dccp_hashinfo.bind2_bucket_cachep = NULL;
return rc;
}
static void __exit dccp_fini(void)
{
+ int bhash_order = get_order(dccp_hashinfo.bhash_size *
+ sizeof(struct inet_bind_hashbucket));
+
ccid_cleanup_builtins();
dccp_mib_exit();
- free_pages((unsigned long)dccp_hashinfo.bhash,
- get_order(dccp_hashinfo.bhash_size *
- sizeof(struct inet_bind_hashbucket)));
+ free_pages((unsigned long)dccp_hashinfo.bhash, bhash_order);
+ free_pages((unsigned long)dccp_hashinfo.bhash2, bhash_order);
free_pages((unsigned long)dccp_hashinfo.ehash,
get_order((dccp_hashinfo.ehash_mask + 1) *
sizeof(struct inet_ehash_bucket)));
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.