diff options
Diffstat (limited to 'net/l2tp/l2tp_ip.c')
| -rw-r--r-- | net/l2tp/l2tp_ip.c | 41 |
1 files changed, 19 insertions, 22 deletions
diff --git a/net/l2tp/l2tp_ip.c b/net/l2tp/l2tp_ip.c index 955662a6dee7..df2a35b5714a 100644 --- a/net/l2tp/l2tp_ip.c +++ b/net/l2tp/l2tp_ip.c @@ -1,6 +1,5 @@ // SPDX-License-Identifier: GPL-2.0-or-later -/* - * L2TPv3 IP encapsulation support +/* L2TPv3 IP encapsulation support * * Copyright (c) 2008,2009,2010 Katalix Systems Ltd */ @@ -125,8 +124,9 @@ static int l2tp_ip_recv(struct sk_buff *skb) goto discard; /* Point to L2TP header */ - optr = ptr = skb->data; - session_id = ntohl(*((__be32 *) ptr)); + optr = skb->data; + ptr = skb->data; + session_id = ntohl(*((__be32 *)ptr)); ptr += 4; /* RFC3931: L2TP/IP packets have the first 4 bytes containing @@ -154,7 +154,8 @@ static int l2tp_ip_recv(struct sk_buff *skb) goto discard_sess; /* Point to L2TP header */ - optr = ptr = skb->data; + optr = skb->data; + ptr = skb->data; ptr += 4; pr_debug("%s: ip recv\n", tunnel->name); print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, ptr, length); @@ -176,7 +177,7 @@ pass_up: if ((skb->data[0] & 0xc0) != 0xc0) goto discard; - tunnel_id = ntohl(*(__be32 *) &skb->data[4]); + tunnel_id = ntohl(*(__be32 *)&skb->data[4]); iph = (struct iphdr *)skb_network_header(skb); read_lock_bh(&l2tp_ip_lock); @@ -260,7 +261,7 @@ static void l2tp_ip_destroy_sock(struct sock *sk) static int l2tp_ip_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len) { struct inet_sock *inet = inet_sk(sk); - struct sockaddr_l2tpip *addr = (struct sockaddr_l2tpip *) uaddr; + struct sockaddr_l2tpip *addr = (struct sockaddr_l2tpip *)uaddr; struct net *net = sock_net(sk); int ret; int chk_addr_ret; @@ -285,8 +286,10 @@ static int l2tp_ip_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len) chk_addr_ret != RTN_MULTICAST && chk_addr_ret != RTN_BROADCAST) goto out; - if (addr->l2tp_addr.s_addr) - inet->inet_rcv_saddr = inet->inet_saddr = addr->l2tp_addr.s_addr; + if (addr->l2tp_addr.s_addr) { + inet->inet_rcv_saddr = addr->l2tp_addr.s_addr; + inet->inet_saddr = addr->l2tp_addr.s_addr; + } if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST) inet->inet_saddr = 0; /* Use device */ @@ -316,7 +319,7 @@ out: static int l2tp_ip_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len) { - struct sockaddr_l2tpip *lsa = (struct sockaddr_l2tpip *) uaddr; + struct sockaddr_l2tpip *lsa = (struct sockaddr_l2tpip *)uaddr; int rc; if (addr_len < sizeof(*lsa)) @@ -375,6 +378,7 @@ static int l2tp_ip_getname(struct socket *sock, struct sockaddr *uaddr, lsa->l2tp_addr.s_addr = inet->inet_daddr; } else { __be32 addr = inet->inet_rcv_saddr; + if (!addr) addr = inet->inet_saddr; lsa->l2tp_conn_id = lsk->conn_id; @@ -422,6 +426,7 @@ static int l2tp_ip_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) /* Get and verify the address. */ if (msg->msg_name) { DECLARE_SOCKADDR(struct sockaddr_l2tpip *, lip, msg->msg_name); + rc = -EINVAL; if (msg->msg_namelen < sizeof(*lip)) goto out; @@ -456,7 +461,7 @@ static int l2tp_ip_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) skb_reset_transport_header(skb); /* Insert 0 session_id */ - *((__be32 *) skb_put(skb, 4)) = 0; + *((__be32 *)skb_put(skb, 4)) = 0; /* Copy user data into skb */ rc = memcpy_from_msg(skb_put(skb, len), msg, len); @@ -467,10 +472,10 @@ static int l2tp_ip_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) fl4 = &inet->cork.fl.u.ip4; if (connected) - rt = (struct rtable *) __sk_dst_check(sk, 0); + rt = (struct rtable *)__sk_dst_check(sk, 0); rcu_read_lock(); - if (rt == NULL) { + if (!rt) { const struct ip_options_rcu *inet_opt; inet_opt = rcu_dereference(inet->inet_opt); @@ -592,7 +597,7 @@ int l2tp_ioctl(struct sock *sk, int cmd, unsigned long arg) return put_user(amount, (int __user *)arg); } -EXPORT_SYMBOL(l2tp_ioctl); +EXPORT_SYMBOL_GPL(l2tp_ioctl); static struct proto l2tp_ip_prot = { .name = "L2TP/IP", @@ -612,10 +617,6 @@ static struct proto l2tp_ip_prot = { .hash = l2tp_ip_hash, .unhash = l2tp_ip_unhash, .obj_size = sizeof(struct l2tp_ip_sock), -#ifdef CONFIG_COMPAT - .compat_setsockopt = compat_ip_setsockopt, - .compat_getsockopt = compat_ip_getsockopt, -#endif }; static const struct proto_ops l2tp_ip_ops = { @@ -638,10 +639,6 @@ static const struct proto_ops l2tp_ip_ops = { .recvmsg = sock_common_recvmsg, .mmap = sock_no_mmap, .sendpage = sock_no_sendpage, -#ifdef CONFIG_COMPAT - .compat_setsockopt = compat_sock_common_setsockopt, - .compat_getsockopt = compat_sock_common_getsockopt, -#endif }; static struct inet_protosw l2tp_ip_protosw = { |