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/* $NetBSD: l2cap_socket.c,v 1.36 2019/01/28 12:53:01 martin 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 1.36 2019/01/28 12:53:01 martin 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;
static int
l2cap_attach(struct socket *so, int proto)
{
int error;
KASSERT(so->so_pcb == NULL);
if (so->so_lock == NULL) {
mutex_obj_hold(bt_lock);
so->so_lock = bt_lock;
solock(so);
}
KASSERT(solocked(so));
/*
* For L2CAP socket PCB we just use an l2cap_channel structure
* since we have nothing to add..
*/
error = soreserve(so, l2cap_sendspace, l2cap_recvspace);
if (error)
return error;
return l2cap_attach_pcb((struct l2cap_channel **)&so->so_pcb,
&l2cap_proto, so);
}
static void
l2cap_detach(struct socket *so)
{
KASSERT(so->so_pcb != NULL);
l2cap_detach_pcb((struct l2cap_channel **)&so->so_pcb);
KASSERT(so->so_pcb == NULL);
}
static int
l2cap_accept(struct socket *so, struct sockaddr *nam)
{
struct l2cap_channel *pcb = so->so_pcb;
KASSERT(solocked(so));
KASSERT(nam != NULL);
if (pcb == NULL)
return EINVAL;
return l2cap_peeraddr_pcb(pcb, (struct sockaddr_bt *)nam);
}
static int
l2cap_bind(struct socket *so, struct sockaddr *nam, struct lwp *l)
{
struct l2cap_channel *pcb = so->so_pcb;
struct sockaddr_bt *sa = (struct sockaddr_bt *)nam;
KASSERT(solocked(so));
KASSERT(nam != NULL);
if (pcb == NULL)
return EINVAL;
if (sa->bt_len != sizeof(struct sockaddr_bt))
return EINVAL;
if (sa->bt_family != AF_BLUETOOTH)
return EAFNOSUPPORT;
return l2cap_bind_pcb(pcb, sa);
}
static int
l2cap_listen(struct socket *so, struct lwp *l)
{
struct l2cap_channel *pcb = so->so_pcb;
KASSERT(solocked(so));
if (pcb == NULL)
return EINVAL;
return l2cap_listen_pcb(pcb);
}
static int
l2cap_connect(struct socket *so, struct sockaddr *nam, struct lwp *l)
{
struct l2cap_channel *pcb = so->so_pcb;
struct sockaddr_bt *sa = (struct sockaddr_bt *)nam;
KASSERT(solocked(so));
KASSERT(nam != NULL);
if (pcb == NULL)
return EINVAL;
if (sa->bt_len != sizeof(struct sockaddr_bt))
return EINVAL;
if (sa->bt_family != AF_BLUETOOTH)
return EAFNOSUPPORT;
soisconnecting(so);
return l2cap_connect_pcb(pcb, sa);
}
static int
l2cap_connect2(struct socket *so, struct socket *so2)
{
KASSERT(solocked(so));
if (so->so_pcb == NULL)
return EINVAL;
return EOPNOTSUPP;
}
static int
l2cap_disconnect(struct socket *so)
{
struct l2cap_channel *pcb = so->so_pcb;
KASSERT(solocked(so));
if (pcb == NULL)
return EINVAL;
soisdisconnecting(so);
return l2cap_disconnect_pcb(pcb, so->so_linger);
}
static int
l2cap_shutdown(struct socket *so)
{
KASSERT(solocked(so));
socantsendmore(so);
return 0;
}
static int
l2cap_abort(struct socket *so)
{
struct l2cap_channel *pcb = so->so_pcb;
KASSERT(solocked(so));
if (pcb == NULL)
return EINVAL;
l2cap_disconnect_pcb(pcb, 0);
soisdisconnected(so);
l2cap_detach(so);
return 0;
}
static int
l2cap_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp)
{
return EPASSTHROUGH;
}
static int
l2cap_stat(struct socket *so, struct stat *ub)
{
KASSERT(solocked(so));
return 0;
}
static int
l2cap_peeraddr(struct socket *so, struct sockaddr *nam)
{
struct l2cap_channel *pcb = so->so_pcb;
KASSERT(solocked(so));
KASSERT(pcb != NULL);
KASSERT(nam != NULL);
return l2cap_peeraddr_pcb(pcb, (struct sockaddr_bt *)nam);
}
static int
l2cap_sockaddr(struct socket *so, struct sockaddr *nam)
{
struct l2cap_channel *pcb = so->so_pcb;
KASSERT(solocked(so));
KASSERT(pcb != NULL);
KASSERT(nam != NULL);
return l2cap_sockaddr_pcb(pcb, (struct sockaddr_bt *)nam);
}
static int
l2cap_rcvd(struct socket *so, int flags, struct lwp *l)
{
KASSERT(solocked(so));
return EOPNOTSUPP;
}
static int
l2cap_recvoob(struct socket *so, struct mbuf *m, int flags)
{
KASSERT(solocked(so));
return EOPNOTSUPP;
}
static int
l2cap_send(struct socket *so, struct mbuf *m, struct sockaddr *nam,
struct mbuf *control, struct lwp *l)
{
struct l2cap_channel *pcb = so->so_pcb;
struct mbuf *m0;
int error = 0;
KASSERT(solocked(so));
KASSERT(m != NULL);
if (control)
m_freem(control);
if (pcb == NULL) {
error = EINVAL;
goto release;
}
if (m->m_pkthdr.len == 0)
goto release;
if (m->m_pkthdr.len > pcb->lc_omtu) {
error = EMSGSIZE;
goto release;
}
m0 = m_copypacket(m, M_DONTWAIT);
if (m0 == NULL) {
error = ENOMEM;
goto release;
}
sbappendrecord(&so->so_snd, m);
return l2cap_send_pcb(pcb, m0);
release:
if (m)
m_freem(m);
return error;
}
static int
l2cap_sendoob(struct socket *so, struct mbuf *m, struct mbuf *control)
{
KASSERT(solocked(so));
m_freem(m);
m_freem(control);
return EOPNOTSUPP;
}
static int
l2cap_purgeif(struct socket *so, struct ifnet *ifp)
{
return EOPNOTSUPP;
}
/*
* 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, false);
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_pcb(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);
}
PR_WRAP_USRREQS(l2cap)
#define l2cap_attach l2cap_attach_wrapper
#define l2cap_detach l2cap_detach_wrapper
#define l2cap_accept l2cap_accept_wrapper
#define l2cap_bind l2cap_bind_wrapper
#define l2cap_listen l2cap_listen_wrapper
#define l2cap_connect l2cap_connect_wrapper
#define l2cap_connect2 l2cap_connect2_wrapper
#define l2cap_disconnect l2cap_disconnect_wrapper
#define l2cap_shutdown l2cap_shutdown_wrapper
#define l2cap_abort l2cap_abort_wrapper
#define l2cap_ioctl l2cap_ioctl_wrapper
#define l2cap_stat l2cap_stat_wrapper
#define l2cap_peeraddr l2cap_peeraddr_wrapper
#define l2cap_sockaddr l2cap_sockaddr_wrapper
#define l2cap_rcvd l2cap_rcvd_wrapper
#define l2cap_recvoob l2cap_recvoob_wrapper
#define l2cap_send l2cap_send_wrapper
#define l2cap_sendoob l2cap_sendoob_wrapper
#define l2cap_purgeif l2cap_purgeif_wrapper
const struct pr_usrreqs l2cap_usrreqs = {
.pr_attach = l2cap_attach,
.pr_detach = l2cap_detach,
.pr_accept = l2cap_accept,
.pr_bind = l2cap_bind,
.pr_listen = l2cap_listen,
.pr_connect = l2cap_connect,
.pr_connect2 = l2cap_connect2,
.pr_disconnect = l2cap_disconnect,
.pr_shutdown = l2cap_shutdown,
.pr_abort = l2cap_abort,
.pr_ioctl = l2cap_ioctl,
.pr_stat = l2cap_stat,
.pr_peeraddr = l2cap_peeraddr,
.pr_sockaddr = l2cap_sockaddr,
.pr_rcvd = l2cap_rcvd,
.pr_recvoob = l2cap_recvoob,
.pr_send = l2cap_send,
.pr_sendoob = l2cap_sendoob,
.pr_purgeif = l2cap_purgeif,
};
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