a152f8a361
function, pru_close, to notify protocols that the file descriptor or other consumer of a socket is closing the socket. pru_abort is now a notification of close also, and no longer detaches. pru_detach is no longer used to notify of close, and will be called during socket tear-down by sofree() when all references to a socket evaporate after an earlier call to abort or close the socket. This means detach is now an unconditional teardown of a socket, whereas previously sockets could persist after detach of the protocol retained a reference. This faciliates sharing mutexes between layers of the network stack as the mutex is required during the checking and removal of references at the head of sofree(). With this change, pru_detach can now assume that the mutex will no longer be required by the socket layer after completion, whereas before this was not necessarily true. Reviewed by: gnn
255 lines
7.7 KiB
C
255 lines
7.7 KiB
C
/*
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* ng_btsocket.c
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*/
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/*-
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* Copyright (c) 2001-2002 Maksim Yevmenkin <m_evmenkin@yahoo.com>
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: ng_btsocket.c,v 1.4 2003/09/14 23:29:06 max Exp $
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bitstring.h>
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#include <sys/errno.h>
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#include <sys/domain.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/mbuf.h>
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#include <sys/mutex.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/sysctl.h>
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#include <sys/taskqueue.h>
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#include <netgraph/ng_message.h>
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#include <netgraph/netgraph.h>
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#include <netgraph/bluetooth/include/ng_bluetooth.h>
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#include <netgraph/bluetooth/include/ng_hci.h>
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#include <netgraph/bluetooth/include/ng_l2cap.h>
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#include <netgraph/bluetooth/include/ng_btsocket.h>
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#include <netgraph/bluetooth/include/ng_btsocket_hci_raw.h>
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#include <netgraph/bluetooth/include/ng_btsocket_l2cap.h>
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#include <netgraph/bluetooth/include/ng_btsocket_rfcomm.h>
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static int ng_btsocket_modevent (module_t, int, void *);
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extern struct domain ng_btsocket_domain;
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/*
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* Bluetooth raw HCI sockets
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*/
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static struct pr_usrreqs ng_btsocket_hci_raw_usrreqs = {
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.pru_abort = ng_btsocket_hci_raw_abort,
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.pru_attach = ng_btsocket_hci_raw_attach,
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.pru_bind = ng_btsocket_hci_raw_bind,
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.pru_connect = ng_btsocket_hci_raw_connect,
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.pru_control = ng_btsocket_hci_raw_control,
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.pru_detach = ng_btsocket_hci_raw_detach,
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.pru_disconnect = ng_btsocket_hci_raw_disconnect,
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.pru_peeraddr = ng_btsocket_hci_raw_peeraddr,
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.pru_send = ng_btsocket_hci_raw_send,
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.pru_shutdown = NULL,
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.pru_sockaddr = ng_btsocket_hci_raw_sockaddr,
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.pru_close = ng_btsocket_hci_raw_close,
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};
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/*
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* Bluetooth raw L2CAP sockets
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*/
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static struct pr_usrreqs ng_btsocket_l2cap_raw_usrreqs = {
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.pru_abort = ng_btsocket_l2cap_raw_abort,
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.pru_attach = ng_btsocket_l2cap_raw_attach,
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.pru_bind = ng_btsocket_l2cap_raw_bind,
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.pru_connect = ng_btsocket_l2cap_raw_connect,
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.pru_control = ng_btsocket_l2cap_raw_control,
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.pru_detach = ng_btsocket_l2cap_raw_detach,
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.pru_disconnect = ng_btsocket_l2cap_raw_disconnect,
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.pru_peeraddr = ng_btsocket_l2cap_raw_peeraddr,
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.pru_send = ng_btsocket_l2cap_raw_send,
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.pru_shutdown = NULL,
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.pru_sockaddr = ng_btsocket_l2cap_raw_sockaddr,
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.pru_close = ng_btsocket_l2cap_raw_close,
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};
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/*
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* Bluetooth SEQPACKET L2CAP sockets
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*/
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static struct pr_usrreqs ng_btsocket_l2cap_usrreqs = {
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.pru_abort = ng_btsocket_l2cap_abort,
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.pru_accept = ng_btsocket_l2cap_accept,
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.pru_attach = ng_btsocket_l2cap_attach,
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.pru_bind = ng_btsocket_l2cap_bind,
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.pru_connect = ng_btsocket_l2cap_connect,
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.pru_control = ng_btsocket_l2cap_control,
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.pru_detach = ng_btsocket_l2cap_detach,
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.pru_disconnect = ng_btsocket_l2cap_disconnect,
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.pru_listen = ng_btsocket_l2cap_listen,
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.pru_peeraddr = ng_btsocket_l2cap_peeraddr,
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.pru_send = ng_btsocket_l2cap_send,
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.pru_shutdown = NULL,
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.pru_sockaddr = ng_btsocket_l2cap_sockaddr,
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.pru_close = ng_btsocket_l2cap_close,
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};
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/*
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* Bluetooth STREAM RFCOMM sockets
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*/
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static struct pr_usrreqs ng_btsocket_rfcomm_usrreqs = {
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.pru_abort = ng_btsocket_rfcomm_abort,
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.pru_accept = ng_btsocket_rfcomm_accept,
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.pru_attach = ng_btsocket_rfcomm_attach,
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.pru_bind = ng_btsocket_rfcomm_bind,
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.pru_connect = ng_btsocket_rfcomm_connect,
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.pru_control = ng_btsocket_rfcomm_control,
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.pru_detach = ng_btsocket_rfcomm_detach,
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.pru_disconnect = ng_btsocket_rfcomm_disconnect,
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.pru_listen = ng_btsocket_rfcomm_listen,
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.pru_peeraddr = ng_btsocket_rfcomm_peeraddr,
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.pru_send = ng_btsocket_rfcomm_send,
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.pru_shutdown = NULL,
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.pru_sockaddr = ng_btsocket_rfcomm_sockaddr,
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.pru_close = ng_btsocket_rfcomm_close,
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};
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/*
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* Definitions of protocols supported in the BLUETOOTH domain
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*/
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static struct protosw ng_btsocket_protosw[] = {
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{
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.pr_type = SOCK_RAW,
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.pr_domain = &ng_btsocket_domain,
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.pr_protocol = BLUETOOTH_PROTO_HCI,
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.pr_flags = PR_ATOMIC|PR_ADDR,
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.pr_ctloutput = ng_btsocket_hci_raw_ctloutput,
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.pr_init = ng_btsocket_hci_raw_init,
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.pr_usrreqs = &ng_btsocket_hci_raw_usrreqs,
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},
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{
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.pr_type = SOCK_RAW,
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.pr_domain = &ng_btsocket_domain,
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.pr_protocol = BLUETOOTH_PROTO_L2CAP,
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.pr_flags = PR_ATOMIC|PR_ADDR,
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.pr_init = ng_btsocket_l2cap_raw_init,
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.pr_usrreqs = &ng_btsocket_l2cap_raw_usrreqs,
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},
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{
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.pr_type = SOCK_SEQPACKET,
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.pr_domain = &ng_btsocket_domain,
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.pr_protocol = BLUETOOTH_PROTO_L2CAP,
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.pr_flags = PR_ATOMIC|PR_CONNREQUIRED,
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.pr_ctloutput = ng_btsocket_l2cap_ctloutput,
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.pr_init = ng_btsocket_l2cap_init,
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.pr_usrreqs = &ng_btsocket_l2cap_usrreqs,
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},
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{
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.pr_type = SOCK_STREAM,
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.pr_domain = &ng_btsocket_domain,
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.pr_protocol = BLUETOOTH_PROTO_RFCOMM,
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.pr_flags = PR_CONNREQUIRED,
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.pr_ctloutput = ng_btsocket_rfcomm_ctloutput,
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.pr_init = ng_btsocket_rfcomm_init,
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.pr_usrreqs = &ng_btsocket_rfcomm_usrreqs,
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}
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};
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#define ng_btsocket_protosw_size \
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(sizeof(ng_btsocket_protosw)/sizeof(ng_btsocket_protosw[0]))
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#define ng_btsocket_protosw_end \
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&ng_btsocket_protosw[ng_btsocket_protosw_size]
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/*
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* BLUETOOTH domain
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*/
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struct domain ng_btsocket_domain = {
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.dom_family = AF_BLUETOOTH,
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.dom_name = "bluetooth",
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.dom_protosw = ng_btsocket_protosw,
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.dom_protoswNPROTOSW = ng_btsocket_protosw_end
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};
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/*
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* Socket sysctl tree
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*/
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SYSCTL_NODE(_net_bluetooth_hci, OID_AUTO, sockets, CTLFLAG_RW,
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0, "Bluetooth HCI sockets family");
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SYSCTL_NODE(_net_bluetooth_l2cap, OID_AUTO, sockets, CTLFLAG_RW,
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0, "Bluetooth L2CAP sockets family");
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SYSCTL_NODE(_net_bluetooth_rfcomm, OID_AUTO, sockets, CTLFLAG_RW,
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0, "Bluetooth RFCOMM sockets family");
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/*
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* Module
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*/
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static moduledata_t ng_btsocket_mod = {
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"ng_btsocket",
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ng_btsocket_modevent,
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NULL
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};
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DECLARE_MODULE(ng_btsocket, ng_btsocket_mod, SI_SUB_PROTO_DOMAIN,
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SI_ORDER_ANY);
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MODULE_VERSION(ng_btsocket, NG_BLUETOOTH_VERSION);
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MODULE_DEPEND(ng_btsocket, ng_bluetooth, NG_BLUETOOTH_VERSION,
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NG_BLUETOOTH_VERSION, NG_BLUETOOTH_VERSION);
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MODULE_DEPEND(ng_btsocket, netgraph, NG_ABI_VERSION,
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NG_ABI_VERSION, NG_ABI_VERSION);
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/*
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* Handle loading and unloading for this node type.
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* This is to handle auxiliary linkages (e.g protocol domain addition).
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*/
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static int
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ng_btsocket_modevent(module_t mod, int event, void *data)
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{
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int error = 0;
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switch (event) {
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case MOD_LOAD:
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net_add_domain(&ng_btsocket_domain);
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break;
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case MOD_UNLOAD:
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/* XXX can't unload protocol domain yet */
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error = EBUSY;
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break;
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default:
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error = EOPNOTSUPP;
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break;
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}
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return (error);
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} /* ng_btsocket_modevent */
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