399 lines
8.7 KiB
C
399 lines
8.7 KiB
C
/* $NetBSD: l2cap_socket.c,v 1.9 2008/08/06 15:01:24 plunky 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 1.9 2008/08/06 15:01:24 plunky 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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/*
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* User Request.
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* up is socket
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* m is either
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* optional mbuf chain containing message
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* ioctl command (PRU_CONTROL)
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* nam is either
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* optional mbuf chain containing an address
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* ioctl data (PRU_CONTROL)
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* optionally protocol number (PRU_ATTACH)
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* message flags (PRU_RCVD)
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* ctl is either
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* optional mbuf chain containing socket options
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* optional interface pointer (PRU_CONTROL, PRU_PURGEIF)
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* l is pointer to process requesting action (if any)
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*
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* we are responsible for disposing of m and ctl if
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* they are mbuf chains
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*/
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int
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l2cap_usrreq(struct socket *up, int req, struct mbuf *m,
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struct mbuf *nam, struct mbuf *ctl, struct lwp *l)
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{
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struct l2cap_channel *pcb = up->so_pcb;
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struct sockaddr_bt *sa;
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struct mbuf *m0;
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int err = 0;
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DPRINTFN(2, "%s\n", prurequests[req]);
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switch (req) {
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case PRU_CONTROL:
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return EPASSTHROUGH;
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case PRU_PURGEIF:
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return EOPNOTSUPP;
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case PRU_ATTACH:
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if (up->so_lock == NULL) {
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mutex_obj_hold(bt_lock);
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up->so_lock = bt_lock;
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solock(up);
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}
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KASSERT(solocked(up));
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if (pcb != NULL)
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return EINVAL;
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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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err = soreserve(up, l2cap_sendspace, l2cap_recvspace);
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if (err)
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return err;
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return l2cap_attach((struct l2cap_channel **)&up->so_pcb,
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&l2cap_proto, up);
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}
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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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switch(req) {
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case PRU_DISCONNECT:
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soisdisconnecting(up);
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return l2cap_disconnect(pcb, up->so_linger);
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case PRU_ABORT:
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l2cap_disconnect(pcb, 0);
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soisdisconnected(up);
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/* fall through to */
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case PRU_DETACH:
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return l2cap_detach((struct l2cap_channel **)&up->so_pcb);
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case PRU_BIND:
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KASSERT(nam != NULL);
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sa = mtod(nam, struct sockaddr_bt *);
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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, sa);
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case PRU_CONNECT:
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KASSERT(nam != NULL);
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sa = mtod(nam, struct sockaddr_bt *);
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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(up);
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return l2cap_connect(pcb, sa);
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case PRU_PEERADDR:
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KASSERT(nam != NULL);
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sa = mtod(nam, struct sockaddr_bt *);
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nam->m_len = sizeof(struct sockaddr_bt);
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return l2cap_peeraddr(pcb, sa);
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case PRU_SOCKADDR:
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KASSERT(nam != NULL);
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sa = mtod(nam, struct sockaddr_bt *);
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nam->m_len = sizeof(struct sockaddr_bt);
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return l2cap_sockaddr(pcb, sa);
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case PRU_SHUTDOWN:
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socantsendmore(up);
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break;
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case PRU_SEND:
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KASSERT(m != NULL);
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if (m->m_pkthdr.len == 0)
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break;
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if (m->m_pkthdr.len > pcb->lc_omtu) {
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err = EMSGSIZE;
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break;
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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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break;
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}
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if (ctl) /* no use for that */
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m_freem(ctl);
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sbappendrecord(&up->so_snd, m);
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return l2cap_send(pcb, m0);
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case PRU_SENSE:
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return 0; /* (no release) */
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case PRU_RCVD:
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case PRU_RCVOOB:
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return EOPNOTSUPP; /* (no release) */
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case PRU_LISTEN:
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return l2cap_listen(pcb);
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case PRU_ACCEPT:
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KASSERT(nam != NULL);
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sa = mtod(nam, struct sockaddr_bt *);
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nam->m_len = sizeof(struct sockaddr_bt);
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return l2cap_peeraddr(pcb, sa);
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case PRU_CONNECT2:
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case PRU_SENDOOB:
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case PRU_FASTTIMO:
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case PRU_SLOWTIMO:
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case PRU_PROTORCV:
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case PRU_PROTOSEND:
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err = EOPNOTSUPP;
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break;
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default:
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UNKNOWN(req);
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err = EOPNOTSUPP;
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break;
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}
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release:
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if (m) m_freem(m);
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if (ctl) m_freem(ctl);
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return err;
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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, 0);
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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(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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