![Hannes Frederic Sowa](/assets/img/avatar_default.png)
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must set msg_namelen to the proper size <= sizeof(struct sockaddr_storage) to return msg_name to the user. This prevents numerous uninitialized memory leaks we had in the recvmsg handlers and makes it harder for new code to accidentally leak uninitialized memory. Optimize for the case recvfrom is called with NULL as address. We don't need to copy the address at all, so set it to NULL before invoking the recvmsg handler. We can do so, because all the recvmsg handlers must cope with the case a plain read() is called on them. read() also sets msg_name to NULL. Also document these changes in include/linux/net.h as suggested by David Miller. Changes since RFC: Set msg->msg_name = NULL if user specified a NULL in msg_name but had a non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't affect sendto as it would bail out earlier while trying to copy-in the address. It also more naturally reflects the logic by the callers of verify_iovec. With this change in place I could remove " if (!uaddr || msg_sys->msg_namelen == 0) msg->msg_name = NULL ". This change does not alter the user visible error logic as we ignore msg_namelen as long as msg_name is NULL. Also remove two unnecessary curly brackets in ___sys_recvmsg and change comments to netdev style. Cc: David Miller <davem@davemloft.net> Suggested-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
836 lines
18 KiB
C
836 lines
18 KiB
C
/*
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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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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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 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 kiocb *iocb, struct socket *sock,
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struct msghdr *msg, size_t len, 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, flags & MSG_DONTWAIT, &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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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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atomic_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_iovec(skb, 0, msg->msg_iov, 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 kiocb *iocb, struct socket *sock,
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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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struct sockaddr_mISDN *maddr;
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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_fromiovec(skb_put(skb, len), msg->msg_iov, 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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maddr = (struct sockaddr_mISDN *)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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if (skb)
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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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strcpy(di.name, dev_name(&dev->dev));
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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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char __user *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, %p, %d)\n", __func__, sock,
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level, optname, optval, 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 (get_user(opt, (int __user *)optval)) {
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err = -EFAULT;
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break;
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}
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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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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;
|
|
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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|
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if (put_user(opt, optval))
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return -EFAULT;
|
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break;
|
|
default:
|
|
return -ENOPROTOOPT;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
data_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
|
|
{
|
|
struct sockaddr_mISDN *maddr = (struct sockaddr_mISDN *) addr;
|
|
struct sock *sk = sock->sk;
|
|
struct sock *csk;
|
|
int err = 0;
|
|
|
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if (*debug & DEBUG_SOCKET)
|
|
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;
|
|
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;
|
|
}
|
|
|
|
if (sk->sk_protocol < ISDN_P_B_START) {
|
|
read_lock_bh(&data_sockets.lock);
|
|
sk_for_each(csk, &data_sockets.head) {
|
|
if (sk == csk)
|
|
continue;
|
|
if (_pms(csk)->dev != _pms(sk)->dev)
|
|
continue;
|
|
if (csk->sk_protocol >= ISDN_P_B_START)
|
|
continue;
|
|
if (IS_ISDN_P_TE(csk->sk_protocol)
|
|
== 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 *addr_len, int peer)
|
|
{
|
|
struct sockaddr_mISDN *maddr = (struct sockaddr_mISDN *) addr;
|
|
struct sock *sk = sock->sk;
|
|
|
|
if (!_pms(sk)->dev)
|
|
return -EBADFD;
|
|
|
|
lock_sock(sk);
|
|
|
|
*addr_len = sizeof(*maddr);
|
|
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 0;
|
|
}
|
|
|
|
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)
|
|
{
|
|
struct sock *sk;
|
|
|
|
if (sock->type != SOCK_DGRAM)
|
|
return -ESOCKTNOSUPPORT;
|
|
|
|
sk = sk_alloc(net, PF_ISDN, GFP_KERNEL, &mISDN_proto);
|
|
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;
|
|
strcpy(di.name, dev_name(&dev->dev));
|
|
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;
|
|
}
|
|
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 (!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,
|
|
.poll = sock_no_poll,
|
|
.listen = sock_no_listen,
|
|
.shutdown = sock_no_shutdown,
|
|
.setsockopt = sock_no_setsockopt,
|
|
.getsockopt = sock_no_getsockopt,
|
|
.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)
|
|
{
|
|
struct sock *sk;
|
|
|
|
if (sock->type != SOCK_RAW)
|
|
return -ESOCKTNOSUPPORT;
|
|
|
|
sk = sk_alloc(net, PF_ISDN, GFP_KERNEL, &mISDN_proto);
|
|
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);
|
|
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);
|
|
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);
|
|
}
|