NetBSD/sys/netbt/rfcomm_socket.c

414 lines
9.0 KiB
C

/* $NetBSD: rfcomm_socket.c,v 1.10 2008/08/06 15:01:24 plunky Exp $ */
/*-
* Copyright (c) 2006 Itronix Inc.
* All rights reserved.
*
* Written by Iain Hibbert for Itronix Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of Itronix Inc. may not be used to endorse
* or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: rfcomm_socket.c,v 1.10 2008/08/06 15:01:24 plunky Exp $");
/* load symbolic names */
#ifdef BLUETOOTH_DEBUG
#define PRUREQUESTS
#define PRCOREQUESTS
#endif
#include <sys/param.h>
#include <sys/domain.h>
#include <sys/kernel.h>
#include <sys/mbuf.h>
#include <sys/proc.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/systm.h>
#include <netbt/bluetooth.h>
#include <netbt/rfcomm.h>
/****************************************************************************
*
* RFCOMM SOCK_STREAM Sockets - serial line emulation
*
*/
static void rfcomm_connecting(void *);
static void rfcomm_connected(void *);
static void rfcomm_disconnected(void *, int);
static void *rfcomm_newconn(void *, struct sockaddr_bt *, struct sockaddr_bt *);
static void rfcomm_complete(void *, int);
static void rfcomm_linkmode(void *, int);
static void rfcomm_input(void *, struct mbuf *);
static const struct btproto rfcomm_proto = {
rfcomm_connecting,
rfcomm_connected,
rfcomm_disconnected,
rfcomm_newconn,
rfcomm_complete,
rfcomm_linkmode,
rfcomm_input,
};
/* sysctl variables */
int rfcomm_sendspace = 4096;
int rfcomm_recvspace = 4096;
/*
* User Request.
* up is socket
* m is either
* optional mbuf chain containing message
* ioctl command (PRU_CONTROL)
* nam is either
* optional mbuf chain containing an address
* ioctl data (PRU_CONTROL)
* optionally protocol number (PRU_ATTACH)
* message flags (PRU_RCVD)
* ctl is either
* optional mbuf chain containing socket options
* optional interface pointer (PRU_CONTROL, PRU_PURGEIF)
* l is pointer to process requesting action (if any)
*
* we are responsible for disposing of m and ctl if
* they are mbuf chains
*/
int
rfcomm_usrreq(struct socket *up, int req, struct mbuf *m,
struct mbuf *nam, struct mbuf *ctl, struct lwp *l)
{
struct rfcomm_dlc *pcb = up->so_pcb;
struct sockaddr_bt *sa;
struct mbuf *m0;
int err = 0;
DPRINTFN(2, "%s\n", prurequests[req]);
switch (req) {
case PRU_CONTROL:
return EPASSTHROUGH;
case PRU_PURGEIF:
return EOPNOTSUPP;
case PRU_ATTACH:
if (up->so_lock == NULL) {
mutex_obj_hold(bt_lock);
up->so_lock = bt_lock;
solock(up);
}
KASSERT(solocked(up));
if (pcb != NULL)
return EINVAL;
/*
* Since we have nothing to add, we attach the DLC
* structure directly to our PCB pointer.
*/
err = soreserve(up, rfcomm_sendspace, rfcomm_recvspace);
if (err)
return err;
err = rfcomm_attach((struct rfcomm_dlc **)&up->so_pcb,
&rfcomm_proto, up);
if (err)
return err;
err = rfcomm_rcvd(up->so_pcb, sbspace(&up->so_rcv));
if (err) {
rfcomm_detach((struct rfcomm_dlc **)&up->so_pcb);
return err;
}
return 0;
}
if (pcb == NULL) {
err = EINVAL;
goto release;
}
switch(req) {
case PRU_DISCONNECT:
soisdisconnecting(up);
return rfcomm_disconnect(pcb, up->so_linger);
case PRU_ABORT:
rfcomm_disconnect(pcb, 0);
soisdisconnected(up);
/* fall through to */
case PRU_DETACH:
return rfcomm_detach((struct rfcomm_dlc **)&up->so_pcb);
case PRU_BIND:
KASSERT(nam != NULL);
sa = mtod(nam, struct sockaddr_bt *);
if (sa->bt_len != sizeof(struct sockaddr_bt))
return EINVAL;
if (sa->bt_family != AF_BLUETOOTH)
return EAFNOSUPPORT;
return rfcomm_bind(pcb, sa);
case PRU_CONNECT:
KASSERT(nam != NULL);
sa = mtod(nam, struct sockaddr_bt *);
if (sa->bt_len != sizeof(struct sockaddr_bt))
return EINVAL;
if (sa->bt_family != AF_BLUETOOTH)
return EAFNOSUPPORT;
soisconnecting(up);
return rfcomm_connect(pcb, sa);
case PRU_PEERADDR:
KASSERT(nam != NULL);
sa = mtod(nam, struct sockaddr_bt *);
nam->m_len = sizeof(struct sockaddr_bt);
return rfcomm_peeraddr(pcb, sa);
case PRU_SOCKADDR:
KASSERT(nam != NULL);
sa = mtod(nam, struct sockaddr_bt *);
nam->m_len = sizeof(struct sockaddr_bt);
return rfcomm_sockaddr(pcb, sa);
case PRU_SHUTDOWN:
socantsendmore(up);
break;
case PRU_SEND:
KASSERT(m != NULL);
if (ctl) /* no use for that */
m_freem(ctl);
m0 = m_copypacket(m, M_DONTWAIT);
if (m0 == NULL)
return ENOMEM;
sbappendstream(&up->so_snd, m);
return rfcomm_send(pcb, m0);
case PRU_SENSE:
return 0; /* (no release) */
case PRU_RCVD:
return rfcomm_rcvd(pcb, sbspace(&up->so_rcv));
case PRU_RCVOOB:
return EOPNOTSUPP; /* (no release) */
case PRU_LISTEN:
return rfcomm_listen(pcb);
case PRU_ACCEPT:
KASSERT(nam != NULL);
sa = mtod(nam, struct sockaddr_bt *);
nam->m_len = sizeof(struct sockaddr_bt);
return rfcomm_peeraddr(pcb, sa);
case PRU_CONNECT2:
case PRU_SENDOOB:
case PRU_FASTTIMO:
case PRU_SLOWTIMO:
case PRU_PROTORCV:
case PRU_PROTOSEND:
err = EOPNOTSUPP;
break;
default:
UNKNOWN(req);
err = EOPNOTSUPP;
break;
}
release:
if (m) m_freem(m);
if (ctl) m_freem(ctl);
return err;
}
/*
* rfcomm_ctloutput(req, socket, sockopt)
*
*/
int
rfcomm_ctloutput(int req, struct socket *so, struct sockopt *sopt)
{
struct rfcomm_dlc *pcb = so->so_pcb;
int err = 0;
DPRINTFN(2, "%s\n", prcorequests[req]);
if (pcb == NULL)
return EINVAL;
if (sopt->sopt_level != BTPROTO_RFCOMM)
return ENOPROTOOPT;
switch(req) {
case PRCO_GETOPT:
err = rfcomm_getopt(pcb, sopt);
break;
case PRCO_SETOPT:
err = rfcomm_setopt(pcb, sopt);
break;
default:
err = ENOPROTOOPT;
break;
}
return err;
}
/**********************************************************************
*
* RFCOMM callbacks
*/
static void
rfcomm_connecting(void *arg)
{
/* struct socket *so = arg; */
KASSERT(arg != NULL);
DPRINTF("Connecting\n");
}
static void
rfcomm_connected(void *arg)
{
struct socket *so = arg;
KASSERT(so != NULL);
DPRINTF("Connected\n");
soisconnected(so);
}
static void
rfcomm_disconnected(void *arg, int err)
{
struct socket *so = arg;
KASSERT(so != NULL);
DPRINTF("Disconnected\n");
so->so_error = err;
soisdisconnected(so);
}
static void *
rfcomm_newconn(void *arg, struct sockaddr_bt *laddr,
struct sockaddr_bt *raddr)
{
struct socket *so = arg;
DPRINTF("New Connection\n");
so = sonewconn(so, 0);
if (so == NULL)
return NULL;
soisconnecting(so);
return so->so_pcb;
}
/*
* rfcomm_complete(rfcomm_dlc, length)
*
* length bytes are sent and may be removed from socket buffer
*/
static void
rfcomm_complete(void *arg, int length)
{
struct socket *so = arg;
sbdrop(&so->so_snd, length);
sowwakeup(so);
}
/*
* rfcomm_linkmode(rfcomm_dlc, new)
*
* link mode change notification.
*/
static void
rfcomm_linkmode(void *arg, int new)
{
struct socket *so = arg;
struct sockopt sopt;
int mode;
DPRINTF("auth %s, encrypt %s, secure %s\n",
(new & RFCOMM_LM_AUTH ? "on" : "off"),
(new & RFCOMM_LM_ENCRYPT ? "on" : "off"),
(new & RFCOMM_LM_SECURE ? "on" : "off"));
sockopt_init(&sopt, BTPROTO_RFCOMM, SO_RFCOMM_LM, 0);
(void)rfcomm_getopt(so->so_pcb, &sopt);
(void)sockopt_getint(&sopt, &mode);
sockopt_destroy(&sopt);
if (((mode & RFCOMM_LM_AUTH) && !(new & RFCOMM_LM_AUTH))
|| ((mode & RFCOMM_LM_ENCRYPT) && !(new & RFCOMM_LM_ENCRYPT))
|| ((mode & RFCOMM_LM_SECURE) && !(new & RFCOMM_LM_SECURE)))
rfcomm_disconnect(so->so_pcb, 0);
}
/*
* rfcomm_input(rfcomm_dlc, mbuf)
*/
static void
rfcomm_input(void *arg, struct mbuf *m)
{
struct socket *so = arg;
KASSERT(so != NULL);
if (m->m_pkthdr.len > sbspace(&so->so_rcv)) {
printf("%s: %d bytes dropped (socket buffer full)\n",
__func__, m->m_pkthdr.len);
m_freem(m);
return;
}
DPRINTFN(10, "received %d bytes\n", m->m_pkthdr.len);
sbappendstream(&so->so_rcv, m);
sorwakeup(so);
}