sctp: Support ipv6only AF_INET6 sockets.

[firefly-linux-kernel-4.4.55.git] / net / sctp / socket.c

diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 253e5ea7e1e8b7d04744e4bdb6b552d7536e87db..a0e879bb202dcb1ad5b0e9a042c03e37daf25b6b 100644 (file)
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -116,7 +116,7 @@ static int sctp_memory_pressure;
 static atomic_t sctp_memory_allocated;
 static atomic_t sctp_sockets_allocated;
 
-static void sctp_enter_memory_pressure(void)
+static void sctp_enter_memory_pressure(struct sock *sk)
 {
        sctp_memory_pressure = 1;
 }
@@ -308,9 +308,16 @@ static struct sctp_af *sctp_sockaddr_af(struct sctp_sock *opt,
        if (len < sizeof (struct sockaddr))
                return NULL;
 
-       /* Does this PF support this AF? */
-       if (!opt->pf->af_supported(addr->sa.sa_family, opt))
-               return NULL;
+       /* V4 mapped address are really of AF_INET family */
+       if (addr->sa.sa_family == AF_INET6 &&
+           ipv6_addr_v4mapped(&addr->v6.sin6_addr)) {
+               if (!opt->pf->af_supported(AF_INET, opt))
+                       return NULL;
+       } else {
+               /* Does this PF support this AF? */
+               if (!opt->pf->af_supported(addr->sa.sa_family, opt))
+                       return NULL;
+       }
 
        /* If we get this far, af is valid. */
        af = sctp_get_af_specific(addr->sa.sa_family);
@@ -3588,7 +3595,7 @@ SCTP_STATIC int sctp_init_sock(struct sock *sk)
 }
 
 /* Cleanup any SCTP per socket resources.  */
-SCTP_STATIC int sctp_destroy_sock(struct sock *sk)
+SCTP_STATIC void sctp_destroy_sock(struct sock *sk)
 {
        struct sctp_endpoint *ep;
 
@@ -3598,7 +3605,6 @@ SCTP_STATIC int sctp_destroy_sock(struct sock *sk)
        ep = sctp_sk(sk)->ep;
        sctp_endpoint_free(ep);
        atomic_dec(&sctp_sockets_allocated);
-       return 0;
 }
 
 /* API 4.1.7 shutdown() - TCP Style Syntax
@@ -4224,6 +4230,8 @@ static int sctp_getsockopt_peer_addrs_num_old(struct sock *sk, int len,
        if (copy_from_user(&id, optval, sizeof(sctp_assoc_t)))
                return -EFAULT;
 
+       printk(KERN_WARNING "SCTP: Use of SCTP_GET_PEER_ADDRS_NUM_OLD "
+                           "socket option deprecated\n");
        /* For UDP-style sockets, id specifies the association to query.  */
        asoc = sctp_id2assoc(sk, id);
        if (!asoc)
@@ -4263,6 +4271,9 @@ static int sctp_getsockopt_peer_addrs_old(struct sock *sk, int len,
 
        if (getaddrs.addr_num <= 0) return -EINVAL;
 
+       printk(KERN_WARNING "SCTP: Use of SCTP_GET_PEER_ADDRS_OLD "
+                           "socket option deprecated\n");
+
        /* For UDP-style sockets, id specifies the association to query.  */
        asoc = sctp_id2assoc(sk, getaddrs.assoc_id);
        if (!asoc)
@@ -4356,6 +4367,9 @@ static int sctp_getsockopt_local_addrs_num_old(struct sock *sk, int len,
        if (copy_from_user(&id, optval, sizeof(sctp_assoc_t)))
                return -EFAULT;
 
+       printk(KERN_WARNING "SCTP: Use of SCTP_GET_LOCAL_ADDRS_NUM_OLD "
+                           "socket option deprecated\n");
+
        /*
         *  For UDP-style sockets, id specifies the association to query.
         *  If the id field is set to the value '0' then the locally bound
@@ -4388,6 +4402,11 @@ static int sctp_getsockopt_local_addrs_num_old(struct sock *sk, int len,
                                    (AF_INET6 == addr->a.sa.sa_family))
                                        continue;
 
+                               if ((PF_INET6 == sk->sk_family) &&
+                                   inet_v6_ipv6only(sk) &&
+                                   (AF_INET == addr->a.sa.sa_family))
+                                       continue;
+
                                cnt++;
                        }
                        rcu_read_unlock();
@@ -4428,6 +4447,10 @@ static int sctp_copy_laddrs_old(struct sock *sk, __u16 port,
                if ((PF_INET == sk->sk_family) &&
                    (AF_INET6 == addr->a.sa.sa_family))
                        continue;
+               if ((PF_INET6 == sk->sk_family) &&
+                   inet_v6_ipv6only(sk) &&
+                   (AF_INET == addr->a.sa.sa_family))
+                       continue;
                memcpy(&temp, &addr->a, sizeof(temp));
                if (!temp.v4.sin_port)
                        temp.v4.sin_port = htons(port);
@@ -4463,6 +4486,10 @@ static int sctp_copy_laddrs(struct sock *sk, __u16 port, void *to,
                if ((PF_INET == sk->sk_family) &&
                    (AF_INET6 == addr->a.sa.sa_family))
                        continue;
+               if ((PF_INET6 == sk->sk_family) &&
+                   inet_v6_ipv6only(sk) &&
+                   (AF_INET == addr->a.sa.sa_family))
+                       continue;
                memcpy(&temp, &addr->a, sizeof(temp));
                if (!temp.v4.sin_port)
                        temp.v4.sin_port = htons(port);
@@ -4513,7 +4540,13 @@ static int sctp_getsockopt_local_addrs_old(struct sock *sk, int len,
        if (copy_from_user(&getaddrs, optval, len))
                return -EFAULT;
 
-       if (getaddrs.addr_num <= 0) return -EINVAL;
+       if (getaddrs.addr_num <= 0 ||
+           getaddrs.addr_num >= (INT_MAX / sizeof(union sctp_addr)))
+               return -EINVAL;
+
+       printk(KERN_WARNING "SCTP: Use of SCTP_GET_LOCAL_ADDRS_OLD "
+                           "socket option deprecated\n");
+
        /*
         *  For UDP-style sockets, id specifies the association to query.
         *  If the id field is set to the value '0' then the locally bound
@@ -5555,8 +5588,8 @@ pp_found:
                            sk2->sk_state != SCTP_SS_LISTENING)
                                continue;
 
-                       if (sctp_bind_addr_match(&ep2->base.bind_addr, addr,
-                                                sctp_sk(sk))) {
+                       if (sctp_bind_addr_conflict(&ep2->base.bind_addr, addr,
+                                                sctp_sk(sk2), sctp_sk(sk))) {
                                ret = (long)sk2;
                                goto fail_unlock;
                        }