554 lines
12 KiB
C
554 lines
12 KiB
C
/* $NetBSD: rfcomm_socket.c,v 1.38 2019/01/28 12:53:01 martin Exp $ */
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/*-
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* Copyright (c) 2006 Itronix Inc.
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* All rights reserved.
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*
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* Written by Iain Hibbert for Itronix Inc.
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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: rfcomm_socket.c,v 1.38 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/rfcomm.h>
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/****************************************************************************
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*
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* RFCOMM SOCK_STREAM Sockets - serial line emulation
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*
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*/
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static void rfcomm_connecting(void *);
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static void rfcomm_connected(void *);
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static void rfcomm_disconnected(void *, int);
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static void *rfcomm_newconn(void *, struct sockaddr_bt *, struct sockaddr_bt *);
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static void rfcomm_complete(void *, int);
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static void rfcomm_linkmode(void *, int);
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static void rfcomm_input(void *, struct mbuf *);
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static const struct btproto rfcomm_proto = {
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rfcomm_connecting,
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rfcomm_connected,
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rfcomm_disconnected,
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rfcomm_newconn,
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rfcomm_complete,
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rfcomm_linkmode,
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rfcomm_input,
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};
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/* sysctl variables */
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int rfcomm_sendspace = 4096;
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int rfcomm_recvspace = 4096;
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static int
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rfcomm_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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* Since we have nothing to add, we attach the DLC
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* structure directly to our PCB pointer.
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*/
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error = soreserve(so, rfcomm_sendspace, rfcomm_recvspace);
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if (error)
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return error;
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error = rfcomm_attach_pcb((struct rfcomm_dlc **)&so->so_pcb,
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&rfcomm_proto, so);
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if (error)
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return error;
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error = rfcomm_rcvd_pcb(so->so_pcb, sbspace(&so->so_rcv));
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if (error) {
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rfcomm_detach_pcb((struct rfcomm_dlc **)&so->so_pcb);
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return error;
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}
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return 0;
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}
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static void
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rfcomm_detach(struct socket *so)
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{
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KASSERT(so->so_pcb != NULL);
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rfcomm_detach_pcb((struct rfcomm_dlc **)&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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rfcomm_accept(struct socket *so, struct sockaddr *nam)
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{
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struct rfcomm_dlc *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 rfcomm_peeraddr_pcb(pcb, (struct sockaddr_bt *)nam);
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}
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static int
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rfcomm_bind(struct socket *so, struct sockaddr *nam, struct lwp *l)
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{
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struct rfcomm_dlc *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 rfcomm_bind_pcb(pcb, sa);
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}
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static int
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rfcomm_listen(struct socket *so, struct lwp *l)
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{
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struct rfcomm_dlc *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 rfcomm_listen_pcb(pcb);
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}
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static int
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rfcomm_connect(struct socket *so, struct sockaddr *nam, struct lwp *l)
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{
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struct rfcomm_dlc *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 rfcomm_connect_pcb(pcb, sa);
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}
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static int
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rfcomm_connect2(struct socket *so, struct socket *so2)
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{
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struct rfcomm_dlc *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 EOPNOTSUPP;
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}
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static int
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rfcomm_disconnect(struct socket *so)
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{
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struct rfcomm_dlc *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 rfcomm_disconnect_pcb(pcb, so->so_linger);
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}
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static int
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rfcomm_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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rfcomm_abort(struct socket *so)
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{
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struct rfcomm_dlc *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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rfcomm_disconnect_pcb(pcb, 0);
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soisdisconnected(so);
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rfcomm_detach(so);
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return 0;
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}
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static int
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rfcomm_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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rfcomm_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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rfcomm_peeraddr(struct socket *so, struct sockaddr *nam)
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{
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struct rfcomm_dlc *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 rfcomm_peeraddr_pcb(pcb, (struct sockaddr_bt *)nam);
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}
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static int
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rfcomm_sockaddr(struct socket *so, struct sockaddr *nam)
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{
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struct rfcomm_dlc *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 rfcomm_sockaddr_pcb(pcb, (struct sockaddr_bt *)nam);
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}
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static int
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rfcomm_rcvd(struct socket *so, int flags, struct lwp *l)
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{
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struct rfcomm_dlc *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 rfcomm_rcvd_pcb(pcb, sbspace(&so->so_rcv));
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}
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static int
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rfcomm_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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rfcomm_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 rfcomm_dlc *pcb = so->so_pcb;
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int err = 0;
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struct mbuf *m0;
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KASSERT(solocked(so));
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KASSERT(m != NULL);
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if (control) /* no use for that */
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m_freem(control);
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if (pcb == NULL) {
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err = EINVAL;
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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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err = ENOMEM;
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goto release;
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}
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sbappendstream(&so->so_snd, m);
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return rfcomm_send_pcb(pcb, m0);
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release:
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m_freem(m);
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return err;
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}
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static int
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rfcomm_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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rfcomm_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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* rfcomm_ctloutput(req, socket, sockopt)
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*
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*/
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int
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rfcomm_ctloutput(int req, struct socket *so, struct sockopt *sopt)
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{
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struct rfcomm_dlc *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_RFCOMM)
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return ENOPROTOOPT;
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switch(req) {
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case PRCO_GETOPT:
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err = rfcomm_getopt(pcb, sopt);
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break;
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case PRCO_SETOPT:
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err = rfcomm_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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* RFCOMM callbacks
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*/
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static void
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rfcomm_connecting(void *arg)
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{
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/* struct socket *so = arg; */
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KASSERT(arg != NULL);
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DPRINTF("Connecting\n");
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}
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static void
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rfcomm_connected(void *arg)
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{
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struct socket *so = arg;
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KASSERT(so != NULL);
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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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rfcomm_disconnected(void *arg, int err)
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{
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struct socket *so = arg;
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KASSERT(so != NULL);
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DPRINTF("Disconnected\n");
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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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rfcomm_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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/*
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* rfcomm_complete(rfcomm_dlc, length)
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*
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* length bytes are sent and may be removed from socket buffer
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*/
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static void
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rfcomm_complete(void *arg, int length)
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{
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struct socket *so = arg;
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sbdrop(&so->so_snd, length);
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sowwakeup(so);
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}
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/*
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* rfcomm_linkmode(rfcomm_dlc, new)
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*
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* link mode change notification.
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*/
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static void
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rfcomm_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 & RFCOMM_LM_AUTH ? "on" : "off"),
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(new & RFCOMM_LM_ENCRYPT ? "on" : "off"),
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(new & RFCOMM_LM_SECURE ? "on" : "off"));
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sockopt_init(&sopt, BTPROTO_RFCOMM, SO_RFCOMM_LM, 0);
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(void)rfcomm_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 & RFCOMM_LM_AUTH) && !(new & RFCOMM_LM_AUTH))
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|| ((mode & RFCOMM_LM_ENCRYPT) && !(new & RFCOMM_LM_ENCRYPT))
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|| ((mode & RFCOMM_LM_SECURE) && !(new & RFCOMM_LM_SECURE)))
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rfcomm_disconnect_pcb(so->so_pcb, 0);
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}
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/*
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* rfcomm_input(rfcomm_dlc, mbuf)
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*/
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static void
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rfcomm_input(void *arg, struct mbuf *m)
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{
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struct socket *so = arg;
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KASSERT(so != NULL);
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if (m->m_pkthdr.len > sbspace(&so->so_rcv)) {
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printf("%s: %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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sbappendstream(&so->so_rcv, m);
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sorwakeup(so);
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}
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PR_WRAP_USRREQS(rfcomm)
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#define rfcomm_attach rfcomm_attach_wrapper
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#define rfcomm_detach rfcomm_detach_wrapper
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#define rfcomm_accept rfcomm_accept_wrapper
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#define rfcomm_bind rfcomm_bind_wrapper
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#define rfcomm_listen rfcomm_listen_wrapper
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#define rfcomm_connect rfcomm_connect_wrapper
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#define rfcomm_connect2 rfcomm_connect2_wrapper
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#define rfcomm_disconnect rfcomm_disconnect_wrapper
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#define rfcomm_shutdown rfcomm_shutdown_wrapper
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#define rfcomm_abort rfcomm_abort_wrapper
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#define rfcomm_ioctl rfcomm_ioctl_wrapper
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#define rfcomm_stat rfcomm_stat_wrapper
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#define rfcomm_peeraddr rfcomm_peeraddr_wrapper
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#define rfcomm_sockaddr rfcomm_sockaddr_wrapper
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#define rfcomm_rcvd rfcomm_rcvd_wrapper
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#define rfcomm_recvoob rfcomm_recvoob_wrapper
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#define rfcomm_send rfcomm_send_wrapper
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#define rfcomm_sendoob rfcomm_sendoob_wrapper
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#define rfcomm_purgeif rfcomm_purgeif_wrapper
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const struct pr_usrreqs rfcomm_usrreqs = {
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.pr_attach = rfcomm_attach,
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.pr_detach = rfcomm_detach,
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.pr_accept = rfcomm_accept,
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.pr_bind = rfcomm_bind,
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.pr_listen = rfcomm_listen,
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.pr_connect = rfcomm_connect,
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.pr_connect2 = rfcomm_connect2,
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.pr_disconnect = rfcomm_disconnect,
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.pr_shutdown = rfcomm_shutdown,
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.pr_abort = rfcomm_abort,
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.pr_ioctl = rfcomm_ioctl,
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.pr_stat = rfcomm_stat,
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.pr_peeraddr = rfcomm_peeraddr,
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.pr_sockaddr = rfcomm_sockaddr,
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.pr_rcvd = rfcomm_rcvd,
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.pr_recvoob = rfcomm_recvoob,
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.pr_send = rfcomm_send,
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.pr_sendoob = rfcomm_sendoob,
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.pr_purgeif = rfcomm_purgeif,
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};
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