diff options
Diffstat (limited to 'net/can/raw.c')
| -rw-r--r-- | net/can/raw.c | 44 |
1 files changed, 25 insertions, 19 deletions
diff --git a/net/can/raw.c b/net/can/raw.c index afcbff063a67..59c039d73c6d 100644 --- a/net/can/raw.c +++ b/net/can/raw.c @@ -1,5 +1,5 @@ -/* - * raw.c - Raw sockets for protocol family CAN +// SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) +/* raw.c - Raw sockets for protocol family CAN * * Copyright (c) 2002-2007 Volkswagen Group Electronic Research * All rights reserved. @@ -64,8 +64,7 @@ MODULE_ALIAS("can-proto-1"); #define MASK_ALL 0 -/* - * A raw socket has a list of can_filters attached to it, each receiving +/* A raw socket has a list of can_filters attached to it, each receiving * the CAN frames matching that filter. If the filter list is empty, * no CAN frames will be received by the socket. The default after * opening the socket, is to have one filter which receives all frames. @@ -96,8 +95,7 @@ struct raw_sock { struct uniqframe __percpu *uniq; }; -/* - * Return pointer to store the extra msg flags for raw_recvmsg(). +/* Return pointer to store the extra msg flags for raw_recvmsg(). * We use the space of one unsigned int beyond the 'struct sockaddr_can' * in skb->cb. */ @@ -156,8 +154,7 @@ static void raw_rcv(struct sk_buff *oskb, void *data) if (!skb) return; - /* - * Put the datagram to the queue so that raw_recvmsg() can + /* Put the datagram to the queue so that raw_recvmsg() can * get it from there. We need to pass the interface index to * raw_recvmsg(). We pass a whole struct sockaddr_can in skb->cb * containing the interface index. @@ -283,7 +280,6 @@ static int raw_notifier(struct notifier_block *nb, return NOTIFY_DONE; switch (msg) { - case NETDEV_UNREGISTER: lock_sock(sk); /* remove current filters & unregister */ @@ -369,8 +365,9 @@ static int raw_release(struct socket *sock) raw_disable_allfilters(dev_net(dev), dev, sk); dev_put(dev); } - } else + } else { raw_disable_allfilters(sock_net(sk), NULL, sk); + } } if (ro->count > 1) @@ -399,7 +396,7 @@ static int raw_bind(struct socket *sock, struct sockaddr *uaddr, int len) int err = 0; int notify_enetdown = 0; - if (len < sizeof(*addr)) + if (len < CAN_REQUIRED_SIZE(*addr, can_ifindex)) return -EINVAL; if (addr->can_family != AF_CAN) return -EINVAL; @@ -450,8 +447,9 @@ static int raw_bind(struct socket *sock, struct sockaddr *uaddr, int len) dev, sk); dev_put(dev); } - } else + } else { raw_disable_allfilters(sock_net(sk), NULL, sk); + } } ro->ifindex = ifindex; ro->bound = 1; @@ -502,7 +500,6 @@ static int raw_setsockopt(struct socket *sock, int level, int optname, return -EINVAL; switch (optname) { - case CAN_RAW_FILTER: if (optlen % sizeof(struct can_filter) != 0) return -EINVAL; @@ -665,17 +662,18 @@ static int raw_getsockopt(struct socket *sock, int level, int optname, return -EINVAL; switch (optname) { - case CAN_RAW_FILTER: lock_sock(sk); if (ro->count > 0) { int fsize = ro->count * sizeof(struct can_filter); + if (len > fsize) len = fsize; if (copy_to_user(optval, ro->filter, len)) err = -EFAULT; - } else + } else { len = 0; + } release_sock(sk); if (!err) @@ -735,15 +733,16 @@ static int raw_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) if (msg->msg_name) { DECLARE_SOCKADDR(struct sockaddr_can *, addr, msg->msg_name); - if (msg->msg_namelen < sizeof(*addr)) + if (msg->msg_namelen < CAN_REQUIRED_SIZE(*addr, can_ifindex)) return -EINVAL; if (addr->can_family != AF_CAN) return -EINVAL; ifindex = addr->can_ifindex; - } else + } else { ifindex = ro->ifindex; + } dev = dev_get_by_index(sock_net(sk), ifindex); if (!dev) @@ -836,6 +835,13 @@ static int raw_recvmsg(struct socket *sock, struct msghdr *msg, size_t size, return size; } +static int raw_sock_no_ioctlcmd(struct socket *sock, unsigned int cmd, + unsigned long arg) +{ + /* no ioctls for socket layer -> hand it down to NIC layer */ + return -ENOIOCTLCMD; +} + static const struct proto_ops raw_ops = { .family = PF_CAN, .release = raw_release, @@ -845,7 +851,7 @@ static const struct proto_ops raw_ops = { .accept = sock_no_accept, .getname = raw_getname, .poll = datagram_poll, - .ioctl = can_ioctl, /* use can_ioctl() from af_can.c */ + .ioctl = raw_sock_no_ioctlcmd, .gettstamp = sock_gettstamp, .listen = sock_no_listen, .shutdown = sock_no_shutdown, @@ -879,7 +885,7 @@ static __init int raw_module_init(void) err = can_proto_register(&raw_can_proto); if (err < 0) - printk(KERN_ERR "can: registration of raw protocol failed\n"); + pr_err("can: registration of raw protocol failed\n"); return err; } |