537 lines
11 KiB
C
537 lines
11 KiB
C
/* $NetBSD: l2cap_socket.c,v 1.36 2019/01/28 12:53:01 martin Exp $ */
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/*-
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* Copyright (c) 2005 Iain Hibbert.
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* Copyright (c) 2006 Itronix Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of Itronix Inc. may not be used to endorse
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* or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: l2cap_socket.c,v 1.36 2019/01/28 12:53:01 martin Exp $");
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/* load symbolic names */
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#ifdef BLUETOOTH_DEBUG
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#define PRUREQUESTS
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#define PRCOREQUESTS
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#endif
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#include <sys/param.h>
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#include <sys/domain.h>
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#include <sys/kernel.h>
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#include <sys/mbuf.h>
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#include <sys/proc.h>
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#include <sys/protosw.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/systm.h>
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#include <netbt/bluetooth.h>
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#include <netbt/l2cap.h>
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/*
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* L2CAP Sockets
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*
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* SOCK_SEQPACKET - normal L2CAP connection
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*
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* SOCK_DGRAM - connectionless L2CAP - XXX not yet
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*/
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static void l2cap_connecting(void *);
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static void l2cap_connected(void *);
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static void l2cap_disconnected(void *, int);
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static void *l2cap_newconn(void *, struct sockaddr_bt *, struct sockaddr_bt *);
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static void l2cap_complete(void *, int);
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static void l2cap_linkmode(void *, int);
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static void l2cap_input(void *, struct mbuf *);
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static const struct btproto l2cap_proto = {
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l2cap_connecting,
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l2cap_connected,
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l2cap_disconnected,
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l2cap_newconn,
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l2cap_complete,
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l2cap_linkmode,
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l2cap_input,
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};
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/* sysctl variables */
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int l2cap_sendspace = 4096;
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int l2cap_recvspace = 4096;
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static int
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l2cap_attach(struct socket *so, int proto)
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{
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int error;
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KASSERT(so->so_pcb == NULL);
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if (so->so_lock == NULL) {
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mutex_obj_hold(bt_lock);
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so->so_lock = bt_lock;
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solock(so);
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}
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KASSERT(solocked(so));
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/*
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* For L2CAP socket PCB we just use an l2cap_channel structure
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* since we have nothing to add..
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*/
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error = soreserve(so, l2cap_sendspace, l2cap_recvspace);
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if (error)
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return error;
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return l2cap_attach_pcb((struct l2cap_channel **)&so->so_pcb,
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&l2cap_proto, so);
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}
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static void
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l2cap_detach(struct socket *so)
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{
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KASSERT(so->so_pcb != NULL);
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l2cap_detach_pcb((struct l2cap_channel **)&so->so_pcb);
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KASSERT(so->so_pcb == NULL);
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}
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static int
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l2cap_accept(struct socket *so, struct sockaddr *nam)
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{
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struct l2cap_channel *pcb = so->so_pcb;
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KASSERT(solocked(so));
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KASSERT(nam != NULL);
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if (pcb == NULL)
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return EINVAL;
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return l2cap_peeraddr_pcb(pcb, (struct sockaddr_bt *)nam);
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}
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static int
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l2cap_bind(struct socket *so, struct sockaddr *nam, struct lwp *l)
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{
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struct l2cap_channel *pcb = so->so_pcb;
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struct sockaddr_bt *sa = (struct sockaddr_bt *)nam;
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KASSERT(solocked(so));
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KASSERT(nam != NULL);
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if (pcb == NULL)
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return EINVAL;
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if (sa->bt_len != sizeof(struct sockaddr_bt))
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return EINVAL;
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if (sa->bt_family != AF_BLUETOOTH)
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return EAFNOSUPPORT;
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return l2cap_bind_pcb(pcb, sa);
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}
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static int
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l2cap_listen(struct socket *so, struct lwp *l)
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{
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struct l2cap_channel *pcb = so->so_pcb;
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KASSERT(solocked(so));
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if (pcb == NULL)
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return EINVAL;
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return l2cap_listen_pcb(pcb);
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}
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static int
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l2cap_connect(struct socket *so, struct sockaddr *nam, struct lwp *l)
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{
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struct l2cap_channel *pcb = so->so_pcb;
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struct sockaddr_bt *sa = (struct sockaddr_bt *)nam;
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KASSERT(solocked(so));
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KASSERT(nam != NULL);
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if (pcb == NULL)
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return EINVAL;
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if (sa->bt_len != sizeof(struct sockaddr_bt))
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return EINVAL;
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if (sa->bt_family != AF_BLUETOOTH)
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return EAFNOSUPPORT;
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soisconnecting(so);
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return l2cap_connect_pcb(pcb, sa);
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}
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static int
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l2cap_connect2(struct socket *so, struct socket *so2)
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{
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KASSERT(solocked(so));
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if (so->so_pcb == NULL)
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return EINVAL;
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return EOPNOTSUPP;
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}
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static int
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l2cap_disconnect(struct socket *so)
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{
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struct l2cap_channel *pcb = so->so_pcb;
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KASSERT(solocked(so));
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if (pcb == NULL)
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return EINVAL;
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soisdisconnecting(so);
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return l2cap_disconnect_pcb(pcb, so->so_linger);
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}
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static int
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l2cap_shutdown(struct socket *so)
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{
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KASSERT(solocked(so));
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socantsendmore(so);
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return 0;
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}
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static int
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l2cap_abort(struct socket *so)
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{
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struct l2cap_channel *pcb = so->so_pcb;
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KASSERT(solocked(so));
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if (pcb == NULL)
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return EINVAL;
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l2cap_disconnect_pcb(pcb, 0);
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soisdisconnected(so);
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l2cap_detach(so);
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return 0;
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}
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static int
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l2cap_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp)
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{
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return EPASSTHROUGH;
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}
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static int
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l2cap_stat(struct socket *so, struct stat *ub)
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{
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KASSERT(solocked(so));
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return 0;
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}
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static int
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l2cap_peeraddr(struct socket *so, struct sockaddr *nam)
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{
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struct l2cap_channel *pcb = so->so_pcb;
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KASSERT(solocked(so));
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KASSERT(pcb != NULL);
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KASSERT(nam != NULL);
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return l2cap_peeraddr_pcb(pcb, (struct sockaddr_bt *)nam);
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}
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static int
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l2cap_sockaddr(struct socket *so, struct sockaddr *nam)
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{
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struct l2cap_channel *pcb = so->so_pcb;
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KASSERT(solocked(so));
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KASSERT(pcb != NULL);
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KASSERT(nam != NULL);
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return l2cap_sockaddr_pcb(pcb, (struct sockaddr_bt *)nam);
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}
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static int
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l2cap_rcvd(struct socket *so, int flags, struct lwp *l)
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{
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KASSERT(solocked(so));
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return EOPNOTSUPP;
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}
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static int
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l2cap_recvoob(struct socket *so, struct mbuf *m, int flags)
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{
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KASSERT(solocked(so));
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return EOPNOTSUPP;
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}
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static int
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l2cap_send(struct socket *so, struct mbuf *m, struct sockaddr *nam,
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struct mbuf *control, struct lwp *l)
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{
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struct l2cap_channel *pcb = so->so_pcb;
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struct mbuf *m0;
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int error = 0;
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KASSERT(solocked(so));
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KASSERT(m != NULL);
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if (control)
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m_freem(control);
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if (pcb == NULL) {
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error = EINVAL;
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goto release;
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}
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if (m->m_pkthdr.len == 0)
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goto release;
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if (m->m_pkthdr.len > pcb->lc_omtu) {
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error = EMSGSIZE;
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goto release;
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}
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m0 = m_copypacket(m, M_DONTWAIT);
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if (m0 == NULL) {
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error = ENOMEM;
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goto release;
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}
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sbappendrecord(&so->so_snd, m);
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return l2cap_send_pcb(pcb, m0);
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release:
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if (m)
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m_freem(m);
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return error;
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}
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static int
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l2cap_sendoob(struct socket *so, struct mbuf *m, struct mbuf *control)
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{
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KASSERT(solocked(so));
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m_freem(m);
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m_freem(control);
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return EOPNOTSUPP;
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}
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static int
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l2cap_purgeif(struct socket *so, struct ifnet *ifp)
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{
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return EOPNOTSUPP;
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}
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/*
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* l2cap_ctloutput(req, socket, sockopt)
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*
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* Apply configuration commands to channel. This corresponds to
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* "Reconfigure Channel Request" in the L2CAP specification.
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*/
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int
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l2cap_ctloutput(int req, struct socket *so, struct sockopt *sopt)
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{
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struct l2cap_channel *pcb = so->so_pcb;
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int err = 0;
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DPRINTFN(2, "%s\n", prcorequests[req]);
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if (pcb == NULL)
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return EINVAL;
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if (sopt->sopt_level != BTPROTO_L2CAP)
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return ENOPROTOOPT;
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switch(req) {
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case PRCO_GETOPT:
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err = l2cap_getopt(pcb, sopt);
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break;
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case PRCO_SETOPT:
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err = l2cap_setopt(pcb, sopt);
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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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return err;
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}
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/**********************************************************************
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*
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* L2CAP Protocol socket callbacks
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*
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*/
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static void
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l2cap_connecting(void *arg)
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{
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struct socket *so = arg;
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DPRINTF("Connecting\n");
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soisconnecting(so);
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}
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static void
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l2cap_connected(void *arg)
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{
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struct socket *so = arg;
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DPRINTF("Connected\n");
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soisconnected(so);
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}
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static void
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l2cap_disconnected(void *arg, int err)
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{
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struct socket *so = arg;
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DPRINTF("Disconnected (%d)\n", err);
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so->so_error = err;
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soisdisconnected(so);
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}
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static void *
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l2cap_newconn(void *arg, struct sockaddr_bt *laddr,
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struct sockaddr_bt *raddr)
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{
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struct socket *so = arg;
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DPRINTF("New Connection\n");
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so = sonewconn(so, false);
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if (so == NULL)
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return NULL;
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soisconnecting(so);
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return so->so_pcb;
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}
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static void
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l2cap_complete(void *arg, int count)
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{
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struct socket *so = arg;
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while (count-- > 0)
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sbdroprecord(&so->so_snd);
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sowwakeup(so);
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}
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static void
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l2cap_linkmode(void *arg, int new)
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{
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struct socket *so = arg;
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struct sockopt sopt;
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int mode;
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DPRINTF("auth %s, encrypt %s, secure %s\n",
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(new & L2CAP_LM_AUTH ? "on" : "off"),
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(new & L2CAP_LM_ENCRYPT ? "on" : "off"),
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(new & L2CAP_LM_SECURE ? "on" : "off"));
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sockopt_init(&sopt, BTPROTO_L2CAP, SO_L2CAP_LM, 0);
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(void)l2cap_getopt(so->so_pcb, &sopt);
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(void)sockopt_getint(&sopt, &mode);
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sockopt_destroy(&sopt);
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if (((mode & L2CAP_LM_AUTH) && !(new & L2CAP_LM_AUTH))
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|| ((mode & L2CAP_LM_ENCRYPT) && !(new & L2CAP_LM_ENCRYPT))
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|| ((mode & L2CAP_LM_SECURE) && !(new & L2CAP_LM_SECURE)))
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l2cap_disconnect_pcb(so->so_pcb, 0);
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}
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static void
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l2cap_input(void *arg, struct mbuf *m)
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{
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struct socket *so = arg;
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if (m->m_pkthdr.len > sbspace(&so->so_rcv)) {
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printf("%s: packet (%d bytes) dropped (socket buffer full)\n",
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__func__, m->m_pkthdr.len);
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m_freem(m);
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return;
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}
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DPRINTFN(10, "received %d bytes\n", m->m_pkthdr.len);
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sbappendrecord(&so->so_rcv, m);
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sorwakeup(so);
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}
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PR_WRAP_USRREQS(l2cap)
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#define l2cap_attach l2cap_attach_wrapper
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#define l2cap_detach l2cap_detach_wrapper
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#define l2cap_accept l2cap_accept_wrapper
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#define l2cap_bind l2cap_bind_wrapper
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#define l2cap_listen l2cap_listen_wrapper
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#define l2cap_connect l2cap_connect_wrapper
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#define l2cap_connect2 l2cap_connect2_wrapper
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#define l2cap_disconnect l2cap_disconnect_wrapper
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#define l2cap_shutdown l2cap_shutdown_wrapper
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#define l2cap_abort l2cap_abort_wrapper
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#define l2cap_ioctl l2cap_ioctl_wrapper
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#define l2cap_stat l2cap_stat_wrapper
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#define l2cap_peeraddr l2cap_peeraddr_wrapper
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#define l2cap_sockaddr l2cap_sockaddr_wrapper
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#define l2cap_rcvd l2cap_rcvd_wrapper
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#define l2cap_recvoob l2cap_recvoob_wrapper
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#define l2cap_send l2cap_send_wrapper
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#define l2cap_sendoob l2cap_sendoob_wrapper
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#define l2cap_purgeif l2cap_purgeif_wrapper
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const struct pr_usrreqs l2cap_usrreqs = {
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.pr_attach = l2cap_attach,
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.pr_detach = l2cap_detach,
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.pr_accept = l2cap_accept,
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.pr_bind = l2cap_bind,
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.pr_listen = l2cap_listen,
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.pr_connect = l2cap_connect,
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.pr_connect2 = l2cap_connect2,
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.pr_disconnect = l2cap_disconnect,
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.pr_shutdown = l2cap_shutdown,
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.pr_abort = l2cap_abort,
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.pr_ioctl = l2cap_ioctl,
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.pr_stat = l2cap_stat,
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.pr_peeraddr = l2cap_peeraddr,
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.pr_sockaddr = l2cap_sockaddr,
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.pr_rcvd = l2cap_rcvd,
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.pr_recvoob = l2cap_recvoob,
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.pr_send = l2cap_send,
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.pr_sendoob = l2cap_sendoob,
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.pr_purgeif = l2cap_purgeif,
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};
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