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![Oliver Hartkopp](/assets/img/avatar_default.png)
skb_recv_datagram() has two parameters 'flags' and 'noblock' that are merged inside skb_recv_datagram() by 'flags | (noblock ? MSG_DONTWAIT : 0)' As 'flags' may contain MSG_DONTWAIT as value most callers split the 'flags' into 'flags' and 'noblock' with finally obsolete bit operations like this: skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &rc); And this is not even done consistently with the 'flags' parameter. This patch removes the obsolete and costly splitting into two parameters and only performs bit operations when really needed on the caller side. One missing conversion thankfully reported by kernel test robot. I missed to enable kunit tests to build the mctp code. Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net> Signed-off-by: David S. Miller <davem@davemloft.net>
825 lines
17 KiB
C
825 lines
17 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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*
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* Author Karsten Keil <kkeil@novell.com>
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*
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* Copyright 2008 by Karsten Keil <kkeil@novell.com>
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*/
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#include <linux/mISDNif.h>
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#include <linux/slab.h>
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#include <linux/export.h>
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#include "core.h"
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static u_int *debug;
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static struct proto mISDN_proto = {
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.name = "misdn",
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.owner = THIS_MODULE,
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.obj_size = sizeof(struct mISDN_sock)
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};
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#define _pms(sk) ((struct mISDN_sock *)sk)
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static struct mISDN_sock_list data_sockets = {
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.lock = __RW_LOCK_UNLOCKED(data_sockets.lock)
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};
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static struct mISDN_sock_list base_sockets = {
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.lock = __RW_LOCK_UNLOCKED(base_sockets.lock)
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};
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#define L2_HEADER_LEN 4
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static inline struct sk_buff *
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_l2_alloc_skb(unsigned int len, gfp_t gfp_mask)
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{
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struct sk_buff *skb;
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skb = alloc_skb(len + L2_HEADER_LEN, gfp_mask);
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if (likely(skb))
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skb_reserve(skb, L2_HEADER_LEN);
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return skb;
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}
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static void
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mISDN_sock_link(struct mISDN_sock_list *l, struct sock *sk)
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{
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write_lock_bh(&l->lock);
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sk_add_node(sk, &l->head);
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write_unlock_bh(&l->lock);
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}
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static void mISDN_sock_unlink(struct mISDN_sock_list *l, struct sock *sk)
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{
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write_lock_bh(&l->lock);
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sk_del_node_init(sk);
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write_unlock_bh(&l->lock);
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}
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static int
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mISDN_send(struct mISDNchannel *ch, struct sk_buff *skb)
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{
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struct mISDN_sock *msk;
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int err;
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msk = container_of(ch, struct mISDN_sock, ch);
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if (*debug & DEBUG_SOCKET)
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printk(KERN_DEBUG "%s len %d %p\n", __func__, skb->len, skb);
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if (msk->sk.sk_state == MISDN_CLOSED)
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return -EUNATCH;
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__net_timestamp(skb);
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err = sock_queue_rcv_skb(&msk->sk, skb);
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if (err)
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printk(KERN_WARNING "%s: error %d\n", __func__, err);
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return err;
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}
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static int
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mISDN_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg)
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{
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struct mISDN_sock *msk;
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msk = container_of(ch, struct mISDN_sock, ch);
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if (*debug & DEBUG_SOCKET)
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printk(KERN_DEBUG "%s(%p, %x, %p)\n", __func__, ch, cmd, arg);
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switch (cmd) {
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case CLOSE_CHANNEL:
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msk->sk.sk_state = MISDN_CLOSED;
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break;
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}
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return 0;
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}
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static inline void
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mISDN_sock_cmsg(struct sock *sk, struct msghdr *msg, struct sk_buff *skb)
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{
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struct __kernel_old_timeval tv;
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if (_pms(sk)->cmask & MISDN_TIME_STAMP) {
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skb_get_timestamp(skb, &tv);
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put_cmsg(msg, SOL_MISDN, MISDN_TIME_STAMP, sizeof(tv), &tv);
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}
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}
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static int
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mISDN_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
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int flags)
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{
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struct sk_buff *skb;
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struct sock *sk = sock->sk;
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int copied, err;
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if (*debug & DEBUG_SOCKET)
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printk(KERN_DEBUG "%s: len %d, flags %x ch.nr %d, proto %x\n",
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__func__, (int)len, flags, _pms(sk)->ch.nr,
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sk->sk_protocol);
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if (flags & (MSG_OOB))
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return -EOPNOTSUPP;
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if (sk->sk_state == MISDN_CLOSED)
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return 0;
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skb = skb_recv_datagram(sk, flags, &err);
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if (!skb)
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return err;
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if (msg->msg_name) {
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DECLARE_SOCKADDR(struct sockaddr_mISDN *, maddr, msg->msg_name);
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maddr->family = AF_ISDN;
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maddr->dev = _pms(sk)->dev->id;
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if ((sk->sk_protocol == ISDN_P_LAPD_TE) ||
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(sk->sk_protocol == ISDN_P_LAPD_NT)) {
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maddr->channel = (mISDN_HEAD_ID(skb) >> 16) & 0xff;
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maddr->tei = (mISDN_HEAD_ID(skb) >> 8) & 0xff;
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maddr->sapi = mISDN_HEAD_ID(skb) & 0xff;
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} else {
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maddr->channel = _pms(sk)->ch.nr;
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maddr->sapi = _pms(sk)->ch.addr & 0xFF;
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maddr->tei = (_pms(sk)->ch.addr >> 8) & 0xFF;
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}
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msg->msg_namelen = sizeof(*maddr);
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}
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copied = skb->len + MISDN_HEADER_LEN;
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if (len < copied) {
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if (flags & MSG_PEEK)
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refcount_dec(&skb->users);
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else
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skb_queue_head(&sk->sk_receive_queue, skb);
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return -ENOSPC;
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}
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memcpy(skb_push(skb, MISDN_HEADER_LEN), mISDN_HEAD_P(skb),
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MISDN_HEADER_LEN);
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err = skb_copy_datagram_msg(skb, 0, msg, copied);
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mISDN_sock_cmsg(sk, msg, skb);
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skb_free_datagram(sk, skb);
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return err ? : copied;
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}
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static int
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mISDN_sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
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{
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struct sock *sk = sock->sk;
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struct sk_buff *skb;
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int err = -ENOMEM;
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if (*debug & DEBUG_SOCKET)
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printk(KERN_DEBUG "%s: len %d flags %x ch %d proto %x\n",
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__func__, (int)len, msg->msg_flags, _pms(sk)->ch.nr,
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sk->sk_protocol);
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if (msg->msg_flags & MSG_OOB)
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return -EOPNOTSUPP;
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if (msg->msg_flags & ~(MSG_DONTWAIT | MSG_NOSIGNAL | MSG_ERRQUEUE))
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return -EINVAL;
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if (len < MISDN_HEADER_LEN)
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return -EINVAL;
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if (sk->sk_state != MISDN_BOUND)
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return -EBADFD;
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lock_sock(sk);
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skb = _l2_alloc_skb(len, GFP_KERNEL);
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if (!skb)
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goto done;
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if (memcpy_from_msg(skb_put(skb, len), msg, len)) {
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err = -EFAULT;
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goto done;
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}
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memcpy(mISDN_HEAD_P(skb), skb->data, MISDN_HEADER_LEN);
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skb_pull(skb, MISDN_HEADER_LEN);
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if (msg->msg_namelen >= sizeof(struct sockaddr_mISDN)) {
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/* if we have a address, we use it */
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DECLARE_SOCKADDR(struct sockaddr_mISDN *, maddr, msg->msg_name);
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mISDN_HEAD_ID(skb) = maddr->channel;
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} else { /* use default for L2 messages */
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if ((sk->sk_protocol == ISDN_P_LAPD_TE) ||
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(sk->sk_protocol == ISDN_P_LAPD_NT))
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mISDN_HEAD_ID(skb) = _pms(sk)->ch.nr;
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}
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if (*debug & DEBUG_SOCKET)
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printk(KERN_DEBUG "%s: ID:%x\n",
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__func__, mISDN_HEAD_ID(skb));
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err = -ENODEV;
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if (!_pms(sk)->ch.peer)
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goto done;
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err = _pms(sk)->ch.recv(_pms(sk)->ch.peer, skb);
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if (err)
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goto done;
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else {
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skb = NULL;
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err = len;
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}
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done:
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kfree_skb(skb);
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release_sock(sk);
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return err;
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}
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static int
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data_sock_release(struct socket *sock)
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{
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struct sock *sk = sock->sk;
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if (*debug & DEBUG_SOCKET)
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printk(KERN_DEBUG "%s(%p) sk=%p\n", __func__, sock, sk);
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if (!sk)
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return 0;
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switch (sk->sk_protocol) {
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case ISDN_P_TE_S0:
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case ISDN_P_NT_S0:
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case ISDN_P_TE_E1:
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case ISDN_P_NT_E1:
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if (sk->sk_state == MISDN_BOUND)
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delete_channel(&_pms(sk)->ch);
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else
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mISDN_sock_unlink(&data_sockets, sk);
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break;
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case ISDN_P_LAPD_TE:
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case ISDN_P_LAPD_NT:
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case ISDN_P_B_RAW:
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case ISDN_P_B_HDLC:
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case ISDN_P_B_X75SLP:
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case ISDN_P_B_L2DTMF:
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case ISDN_P_B_L2DSP:
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case ISDN_P_B_L2DSPHDLC:
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delete_channel(&_pms(sk)->ch);
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mISDN_sock_unlink(&data_sockets, sk);
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break;
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}
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lock_sock(sk);
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sock_orphan(sk);
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skb_queue_purge(&sk->sk_receive_queue);
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release_sock(sk);
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sock_put(sk);
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return 0;
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}
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static int
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data_sock_ioctl_bound(struct sock *sk, unsigned int cmd, void __user *p)
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{
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struct mISDN_ctrl_req cq;
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int err = -EINVAL, val[2];
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struct mISDNchannel *bchan, *next;
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lock_sock(sk);
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if (!_pms(sk)->dev) {
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err = -ENODEV;
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goto done;
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}
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switch (cmd) {
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case IMCTRLREQ:
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if (copy_from_user(&cq, p, sizeof(cq))) {
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err = -EFAULT;
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break;
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}
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if ((sk->sk_protocol & ~ISDN_P_B_MASK) == ISDN_P_B_START) {
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list_for_each_entry_safe(bchan, next,
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&_pms(sk)->dev->bchannels, list) {
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if (bchan->nr == cq.channel) {
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err = bchan->ctrl(bchan,
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CONTROL_CHANNEL, &cq);
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break;
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}
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}
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} else
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err = _pms(sk)->dev->D.ctrl(&_pms(sk)->dev->D,
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CONTROL_CHANNEL, &cq);
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if (err)
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break;
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if (copy_to_user(p, &cq, sizeof(cq)))
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err = -EFAULT;
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break;
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case IMCLEAR_L2:
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if (sk->sk_protocol != ISDN_P_LAPD_NT) {
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err = -EINVAL;
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break;
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}
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val[0] = cmd;
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if (get_user(val[1], (int __user *)p)) {
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err = -EFAULT;
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break;
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}
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err = _pms(sk)->dev->teimgr->ctrl(_pms(sk)->dev->teimgr,
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CONTROL_CHANNEL, val);
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break;
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case IMHOLD_L1:
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if (sk->sk_protocol != ISDN_P_LAPD_NT
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&& sk->sk_protocol != ISDN_P_LAPD_TE) {
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err = -EINVAL;
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break;
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}
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val[0] = cmd;
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if (get_user(val[1], (int __user *)p)) {
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err = -EFAULT;
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break;
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}
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err = _pms(sk)->dev->teimgr->ctrl(_pms(sk)->dev->teimgr,
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CONTROL_CHANNEL, val);
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break;
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default:
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err = -EINVAL;
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break;
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}
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done:
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release_sock(sk);
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return err;
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}
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static int
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data_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
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{
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int err = 0, id;
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struct sock *sk = sock->sk;
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struct mISDNdevice *dev;
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struct mISDNversion ver;
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switch (cmd) {
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case IMGETVERSION:
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ver.major = MISDN_MAJOR_VERSION;
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ver.minor = MISDN_MINOR_VERSION;
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ver.release = MISDN_RELEASE;
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if (copy_to_user((void __user *)arg, &ver, sizeof(ver)))
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err = -EFAULT;
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break;
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case IMGETCOUNT:
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id = get_mdevice_count();
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if (put_user(id, (int __user *)arg))
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err = -EFAULT;
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break;
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case IMGETDEVINFO:
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if (get_user(id, (int __user *)arg)) {
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err = -EFAULT;
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break;
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}
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dev = get_mdevice(id);
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if (dev) {
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struct mISDN_devinfo di;
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memset(&di, 0, sizeof(di));
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di.id = dev->id;
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di.Dprotocols = dev->Dprotocols;
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di.Bprotocols = dev->Bprotocols | get_all_Bprotocols();
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di.protocol = dev->D.protocol;
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memcpy(di.channelmap, dev->channelmap,
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sizeof(di.channelmap));
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di.nrbchan = dev->nrbchan;
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strscpy(di.name, dev_name(&dev->dev), sizeof(di.name));
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if (copy_to_user((void __user *)arg, &di, sizeof(di)))
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err = -EFAULT;
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} else
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err = -ENODEV;
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break;
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default:
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if (sk->sk_state == MISDN_BOUND)
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err = data_sock_ioctl_bound(sk, cmd,
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(void __user *)arg);
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else
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err = -ENOTCONN;
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}
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return err;
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}
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static int data_sock_setsockopt(struct socket *sock, int level, int optname,
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sockptr_t optval, unsigned int len)
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{
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struct sock *sk = sock->sk;
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int err = 0, opt = 0;
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if (*debug & DEBUG_SOCKET)
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printk(KERN_DEBUG "%s(%p, %d, %x, optval, %d)\n", __func__, sock,
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level, optname, len);
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lock_sock(sk);
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switch (optname) {
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case MISDN_TIME_STAMP:
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if (copy_from_sockptr(&opt, optval, sizeof(int))) {
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err = -EFAULT;
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break;
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}
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if (opt)
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_pms(sk)->cmask |= MISDN_TIME_STAMP;
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else
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_pms(sk)->cmask &= ~MISDN_TIME_STAMP;
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break;
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default:
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err = -ENOPROTOOPT;
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break;
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}
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release_sock(sk);
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return err;
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}
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static int data_sock_getsockopt(struct socket *sock, int level, int optname,
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char __user *optval, int __user *optlen)
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{
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struct sock *sk = sock->sk;
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int len, opt;
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if (get_user(len, optlen))
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return -EFAULT;
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if (len != sizeof(char))
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return -EINVAL;
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switch (optname) {
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case MISDN_TIME_STAMP:
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if (_pms(sk)->cmask & MISDN_TIME_STAMP)
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opt = 1;
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else
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opt = 0;
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if (put_user(opt, optval))
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return -EFAULT;
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break;
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default:
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return -ENOPROTOOPT;
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}
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return 0;
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}
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static int
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data_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
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{
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struct sockaddr_mISDN *maddr = (struct sockaddr_mISDN *) addr;
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struct sock *sk = sock->sk;
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struct sock *csk;
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int err = 0;
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if (*debug & DEBUG_SOCKET)
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printk(KERN_DEBUG "%s(%p) sk=%p\n", __func__, sock, sk);
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if (addr_len != sizeof(struct sockaddr_mISDN))
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return -EINVAL;
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if (!maddr || maddr->family != AF_ISDN)
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return -EINVAL;
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lock_sock(sk);
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if (_pms(sk)->dev) {
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err = -EALREADY;
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goto done;
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}
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_pms(sk)->dev = get_mdevice(maddr->dev);
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if (!_pms(sk)->dev) {
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err = -ENODEV;
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goto done;
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}
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if (sk->sk_protocol < ISDN_P_B_START) {
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read_lock_bh(&data_sockets.lock);
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sk_for_each(csk, &data_sockets.head) {
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if (sk == csk)
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continue;
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if (_pms(csk)->dev != _pms(sk)->dev)
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continue;
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if (csk->sk_protocol >= ISDN_P_B_START)
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continue;
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if (IS_ISDN_P_TE(csk->sk_protocol)
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|
== IS_ISDN_P_TE(sk->sk_protocol))
|
|
continue;
|
|
read_unlock_bh(&data_sockets.lock);
|
|
err = -EBUSY;
|
|
goto done;
|
|
}
|
|
read_unlock_bh(&data_sockets.lock);
|
|
}
|
|
|
|
_pms(sk)->ch.send = mISDN_send;
|
|
_pms(sk)->ch.ctrl = mISDN_ctrl;
|
|
|
|
switch (sk->sk_protocol) {
|
|
case ISDN_P_TE_S0:
|
|
case ISDN_P_NT_S0:
|
|
case ISDN_P_TE_E1:
|
|
case ISDN_P_NT_E1:
|
|
mISDN_sock_unlink(&data_sockets, sk);
|
|
err = connect_layer1(_pms(sk)->dev, &_pms(sk)->ch,
|
|
sk->sk_protocol, maddr);
|
|
if (err)
|
|
mISDN_sock_link(&data_sockets, sk);
|
|
break;
|
|
case ISDN_P_LAPD_TE:
|
|
case ISDN_P_LAPD_NT:
|
|
err = create_l2entity(_pms(sk)->dev, &_pms(sk)->ch,
|
|
sk->sk_protocol, maddr);
|
|
break;
|
|
case ISDN_P_B_RAW:
|
|
case ISDN_P_B_HDLC:
|
|
case ISDN_P_B_X75SLP:
|
|
case ISDN_P_B_L2DTMF:
|
|
case ISDN_P_B_L2DSP:
|
|
case ISDN_P_B_L2DSPHDLC:
|
|
err = connect_Bstack(_pms(sk)->dev, &_pms(sk)->ch,
|
|
sk->sk_protocol, maddr);
|
|
break;
|
|
default:
|
|
err = -EPROTONOSUPPORT;
|
|
}
|
|
if (err)
|
|
goto done;
|
|
sk->sk_state = MISDN_BOUND;
|
|
_pms(sk)->ch.protocol = sk->sk_protocol;
|
|
|
|
done:
|
|
release_sock(sk);
|
|
return err;
|
|
}
|
|
|
|
static int
|
|
data_sock_getname(struct socket *sock, struct sockaddr *addr,
|
|
int peer)
|
|
{
|
|
struct sockaddr_mISDN *maddr = (struct sockaddr_mISDN *) addr;
|
|
struct sock *sk = sock->sk;
|
|
|
|
if (!_pms(sk)->dev)
|
|
return -EBADFD;
|
|
|
|
lock_sock(sk);
|
|
|
|
maddr->family = AF_ISDN;
|
|
maddr->dev = _pms(sk)->dev->id;
|
|
maddr->channel = _pms(sk)->ch.nr;
|
|
maddr->sapi = _pms(sk)->ch.addr & 0xff;
|
|
maddr->tei = (_pms(sk)->ch.addr >> 8) & 0xff;
|
|
release_sock(sk);
|
|
return sizeof(*maddr);
|
|
}
|
|
|
|
static const struct proto_ops data_sock_ops = {
|
|
.family = PF_ISDN,
|
|
.owner = THIS_MODULE,
|
|
.release = data_sock_release,
|
|
.ioctl = data_sock_ioctl,
|
|
.bind = data_sock_bind,
|
|
.getname = data_sock_getname,
|
|
.sendmsg = mISDN_sock_sendmsg,
|
|
.recvmsg = mISDN_sock_recvmsg,
|
|
.poll = datagram_poll,
|
|
.listen = sock_no_listen,
|
|
.shutdown = sock_no_shutdown,
|
|
.setsockopt = data_sock_setsockopt,
|
|
.getsockopt = data_sock_getsockopt,
|
|
.connect = sock_no_connect,
|
|
.socketpair = sock_no_socketpair,
|
|
.accept = sock_no_accept,
|
|
.mmap = sock_no_mmap
|
|
};
|
|
|
|
static int
|
|
data_sock_create(struct net *net, struct socket *sock, int protocol, int kern)
|
|
{
|
|
struct sock *sk;
|
|
|
|
if (sock->type != SOCK_DGRAM)
|
|
return -ESOCKTNOSUPPORT;
|
|
|
|
sk = sk_alloc(net, PF_ISDN, GFP_KERNEL, &mISDN_proto, kern);
|
|
if (!sk)
|
|
return -ENOMEM;
|
|
|
|
sock_init_data(sock, sk);
|
|
|
|
sock->ops = &data_sock_ops;
|
|
sock->state = SS_UNCONNECTED;
|
|
sock_reset_flag(sk, SOCK_ZAPPED);
|
|
|
|
sk->sk_protocol = protocol;
|
|
sk->sk_state = MISDN_OPEN;
|
|
mISDN_sock_link(&data_sockets, sk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
base_sock_release(struct socket *sock)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
|
|
printk(KERN_DEBUG "%s(%p) sk=%p\n", __func__, sock, sk);
|
|
if (!sk)
|
|
return 0;
|
|
|
|
mISDN_sock_unlink(&base_sockets, sk);
|
|
sock_orphan(sk);
|
|
sock_put(sk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
base_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
|
|
{
|
|
int err = 0, id;
|
|
struct mISDNdevice *dev;
|
|
struct mISDNversion ver;
|
|
|
|
switch (cmd) {
|
|
case IMGETVERSION:
|
|
ver.major = MISDN_MAJOR_VERSION;
|
|
ver.minor = MISDN_MINOR_VERSION;
|
|
ver.release = MISDN_RELEASE;
|
|
if (copy_to_user((void __user *)arg, &ver, sizeof(ver)))
|
|
err = -EFAULT;
|
|
break;
|
|
case IMGETCOUNT:
|
|
id = get_mdevice_count();
|
|
if (put_user(id, (int __user *)arg))
|
|
err = -EFAULT;
|
|
break;
|
|
case IMGETDEVINFO:
|
|
if (get_user(id, (int __user *)arg)) {
|
|
err = -EFAULT;
|
|
break;
|
|
}
|
|
dev = get_mdevice(id);
|
|
if (dev) {
|
|
struct mISDN_devinfo di;
|
|
|
|
memset(&di, 0, sizeof(di));
|
|
di.id = dev->id;
|
|
di.Dprotocols = dev->Dprotocols;
|
|
di.Bprotocols = dev->Bprotocols | get_all_Bprotocols();
|
|
di.protocol = dev->D.protocol;
|
|
memcpy(di.channelmap, dev->channelmap,
|
|
sizeof(di.channelmap));
|
|
di.nrbchan = dev->nrbchan;
|
|
strscpy(di.name, dev_name(&dev->dev), sizeof(di.name));
|
|
if (copy_to_user((void __user *)arg, &di, sizeof(di)))
|
|
err = -EFAULT;
|
|
} else
|
|
err = -ENODEV;
|
|
break;
|
|
case IMSETDEVNAME:
|
|
{
|
|
struct mISDN_devrename dn;
|
|
if (copy_from_user(&dn, (void __user *)arg,
|
|
sizeof(dn))) {
|
|
err = -EFAULT;
|
|
break;
|
|
}
|
|
dn.name[sizeof(dn.name) - 1] = '\0';
|
|
dev = get_mdevice(dn.id);
|
|
if (dev)
|
|
err = device_rename(&dev->dev, dn.name);
|
|
else
|
|
err = -ENODEV;
|
|
}
|
|
break;
|
|
default:
|
|
err = -EINVAL;
|
|
}
|
|
return err;
|
|
}
|
|
|
|
static int
|
|
base_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
|
|
{
|
|
struct sockaddr_mISDN *maddr = (struct sockaddr_mISDN *) addr;
|
|
struct sock *sk = sock->sk;
|
|
int err = 0;
|
|
|
|
if (addr_len < sizeof(struct sockaddr_mISDN))
|
|
return -EINVAL;
|
|
|
|
if (!maddr || maddr->family != AF_ISDN)
|
|
return -EINVAL;
|
|
|
|
lock_sock(sk);
|
|
|
|
if (_pms(sk)->dev) {
|
|
err = -EALREADY;
|
|
goto done;
|
|
}
|
|
|
|
_pms(sk)->dev = get_mdevice(maddr->dev);
|
|
if (!_pms(sk)->dev) {
|
|
err = -ENODEV;
|
|
goto done;
|
|
}
|
|
sk->sk_state = MISDN_BOUND;
|
|
|
|
done:
|
|
release_sock(sk);
|
|
return err;
|
|
}
|
|
|
|
static const struct proto_ops base_sock_ops = {
|
|
.family = PF_ISDN,
|
|
.owner = THIS_MODULE,
|
|
.release = base_sock_release,
|
|
.ioctl = base_sock_ioctl,
|
|
.bind = base_sock_bind,
|
|
.getname = sock_no_getname,
|
|
.sendmsg = sock_no_sendmsg,
|
|
.recvmsg = sock_no_recvmsg,
|
|
.listen = sock_no_listen,
|
|
.shutdown = sock_no_shutdown,
|
|
.connect = sock_no_connect,
|
|
.socketpair = sock_no_socketpair,
|
|
.accept = sock_no_accept,
|
|
.mmap = sock_no_mmap
|
|
};
|
|
|
|
|
|
static int
|
|
base_sock_create(struct net *net, struct socket *sock, int protocol, int kern)
|
|
{
|
|
struct sock *sk;
|
|
|
|
if (sock->type != SOCK_RAW)
|
|
return -ESOCKTNOSUPPORT;
|
|
if (!capable(CAP_NET_RAW))
|
|
return -EPERM;
|
|
|
|
sk = sk_alloc(net, PF_ISDN, GFP_KERNEL, &mISDN_proto, kern);
|
|
if (!sk)
|
|
return -ENOMEM;
|
|
|
|
sock_init_data(sock, sk);
|
|
sock->ops = &base_sock_ops;
|
|
sock->state = SS_UNCONNECTED;
|
|
sock_reset_flag(sk, SOCK_ZAPPED);
|
|
sk->sk_protocol = protocol;
|
|
sk->sk_state = MISDN_OPEN;
|
|
mISDN_sock_link(&base_sockets, sk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
mISDN_sock_create(struct net *net, struct socket *sock, int proto, int kern)
|
|
{
|
|
int err = -EPROTONOSUPPORT;
|
|
|
|
switch (proto) {
|
|
case ISDN_P_BASE:
|
|
err = base_sock_create(net, sock, proto, kern);
|
|
break;
|
|
case ISDN_P_TE_S0:
|
|
case ISDN_P_NT_S0:
|
|
case ISDN_P_TE_E1:
|
|
case ISDN_P_NT_E1:
|
|
case ISDN_P_LAPD_TE:
|
|
case ISDN_P_LAPD_NT:
|
|
case ISDN_P_B_RAW:
|
|
case ISDN_P_B_HDLC:
|
|
case ISDN_P_B_X75SLP:
|
|
case ISDN_P_B_L2DTMF:
|
|
case ISDN_P_B_L2DSP:
|
|
case ISDN_P_B_L2DSPHDLC:
|
|
err = data_sock_create(net, sock, proto, kern);
|
|
break;
|
|
default:
|
|
return err;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static const struct net_proto_family mISDN_sock_family_ops = {
|
|
.owner = THIS_MODULE,
|
|
.family = PF_ISDN,
|
|
.create = mISDN_sock_create,
|
|
};
|
|
|
|
int
|
|
misdn_sock_init(u_int *deb)
|
|
{
|
|
int err;
|
|
|
|
debug = deb;
|
|
err = sock_register(&mISDN_sock_family_ops);
|
|
if (err)
|
|
printk(KERN_ERR "%s: error(%d)\n", __func__, err);
|
|
return err;
|
|
}
|
|
|
|
void
|
|
misdn_sock_cleanup(void)
|
|
{
|
|
sock_unregister(PF_ISDN);
|
|
}
|