NetBSD/sys/netbt/l2cap_socket.c

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/* $NetBSD: l2cap_socket.c,v 1.9 2008/08/06 15:01:24 plunky Exp $ */
/*-
* Copyright (c) 2005 Iain Hibbert.
* Copyright (c) 2006 Itronix Inc.
* All rights reserved.
*
* 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: l2cap_socket.c,v 1.9 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/l2cap.h>
/*
* L2CAP Sockets
*
* SOCK_SEQPACKET - normal L2CAP connection
*
* SOCK_DGRAM - connectionless L2CAP - XXX not yet
*/
static void l2cap_connecting(void *);
static void l2cap_connected(void *);
static void l2cap_disconnected(void *, int);
static void *l2cap_newconn(void *, struct sockaddr_bt *, struct sockaddr_bt *);
static void l2cap_complete(void *, int);
static void l2cap_linkmode(void *, int);
static void l2cap_input(void *, struct mbuf *);
static const struct btproto l2cap_proto = {
l2cap_connecting,
l2cap_connected,
l2cap_disconnected,
l2cap_newconn,
l2cap_complete,
l2cap_linkmode,
l2cap_input,
};
/* sysctl variables */
int l2cap_sendspace = 4096;
int l2cap_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
l2cap_usrreq(struct socket *up, int req, struct mbuf *m,
struct mbuf *nam, struct mbuf *ctl, struct lwp *l)
{
struct l2cap_channel *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;
/*
* For L2CAP socket PCB we just use an l2cap_channel structure
* since we have nothing to add..
*/
err = soreserve(up, l2cap_sendspace, l2cap_recvspace);
if (err)
return err;
return l2cap_attach((struct l2cap_channel **)&up->so_pcb,
&l2cap_proto, up);
}
if (pcb == NULL) {
err = EINVAL;
goto release;
}
switch(req) {
case PRU_DISCONNECT:
soisdisconnecting(up);
return l2cap_disconnect(pcb, up->so_linger);
case PRU_ABORT:
l2cap_disconnect(pcb, 0);
soisdisconnected(up);
/* fall through to */
case PRU_DETACH:
return l2cap_detach((struct l2cap_channel **)&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 l2cap_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 l2cap_connect(pcb, sa);
case PRU_PEERADDR:
KASSERT(nam != NULL);
sa = mtod(nam, struct sockaddr_bt *);
nam->m_len = sizeof(struct sockaddr_bt);
return l2cap_peeraddr(pcb, sa);
case PRU_SOCKADDR:
KASSERT(nam != NULL);
sa = mtod(nam, struct sockaddr_bt *);
nam->m_len = sizeof(struct sockaddr_bt);
return l2cap_sockaddr(pcb, sa);
case PRU_SHUTDOWN:
socantsendmore(up);
break;
case PRU_SEND:
KASSERT(m != NULL);
if (m->m_pkthdr.len == 0)
break;
if (m->m_pkthdr.len > pcb->lc_omtu) {
err = EMSGSIZE;
break;
}
m0 = m_copypacket(m, M_DONTWAIT);
if (m0 == NULL) {
err = ENOMEM;
break;
}
if (ctl) /* no use for that */
m_freem(ctl);
sbappendrecord(&up->so_snd, m);
return l2cap_send(pcb, m0);
case PRU_SENSE:
return 0; /* (no release) */
case PRU_RCVD:
case PRU_RCVOOB:
return EOPNOTSUPP; /* (no release) */
case PRU_LISTEN:
return l2cap_listen(pcb);
case PRU_ACCEPT:
KASSERT(nam != NULL);
sa = mtod(nam, struct sockaddr_bt *);
nam->m_len = sizeof(struct sockaddr_bt);
return l2cap_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;
}
/*
* l2cap_ctloutput(req, socket, sockopt)
*
* Apply configuration commands to channel. This corresponds to
* "Reconfigure Channel Request" in the L2CAP specification.
*/
int
l2cap_ctloutput(int req, struct socket *so, struct sockopt *sopt)
{
struct l2cap_channel *pcb = so->so_pcb;
int err = 0;
DPRINTFN(2, "%s\n", prcorequests[req]);
if (pcb == NULL)
return EINVAL;
if (sopt->sopt_level != BTPROTO_L2CAP)
return ENOPROTOOPT;
switch(req) {
case PRCO_GETOPT:
err = l2cap_getopt(pcb, sopt);
break;
case PRCO_SETOPT:
err = l2cap_setopt(pcb, sopt);
break;
default:
err = ENOPROTOOPT;
break;
}
return err;
}
/**********************************************************************
*
* L2CAP Protocol socket callbacks
*
*/
static void
l2cap_connecting(void *arg)
{
struct socket *so = arg;
DPRINTF("Connecting\n");
soisconnecting(so);
}
static void
l2cap_connected(void *arg)
{
struct socket *so = arg;
DPRINTF("Connected\n");
soisconnected(so);
}
static void
l2cap_disconnected(void *arg, int err)
{
struct socket *so = arg;
DPRINTF("Disconnected (%d)\n", err);
so->so_error = err;
soisdisconnected(so);
}
static void *
l2cap_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;
}
static void
l2cap_complete(void *arg, int count)
{
struct socket *so = arg;
while (count-- > 0)
sbdroprecord(&so->so_snd);
sowwakeup(so);
}
static void
l2cap_linkmode(void *arg, int new)
{
struct socket *so = arg;
struct sockopt sopt;
int mode;
DPRINTF("auth %s, encrypt %s, secure %s\n",
(new & L2CAP_LM_AUTH ? "on" : "off"),
(new & L2CAP_LM_ENCRYPT ? "on" : "off"),
(new & L2CAP_LM_SECURE ? "on" : "off"));
sockopt_init(&sopt, BTPROTO_L2CAP, SO_L2CAP_LM, 0);
(void)l2cap_getopt(so->so_pcb, &sopt);
(void)sockopt_getint(&sopt, &mode);
sockopt_destroy(&sopt);
if (((mode & L2CAP_LM_AUTH) && !(new & L2CAP_LM_AUTH))
|| ((mode & L2CAP_LM_ENCRYPT) && !(new & L2CAP_LM_ENCRYPT))
|| ((mode & L2CAP_LM_SECURE) && !(new & L2CAP_LM_SECURE)))
l2cap_disconnect(so->so_pcb, 0);
}
static void
l2cap_input(void *arg, struct mbuf *m)
{
struct socket *so = arg;
if (m->m_pkthdr.len > sbspace(&so->so_rcv)) {
printf("%s: packet (%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);
sbappendrecord(&so->so_rcv, m);
sorwakeup(so);
}