diff options
Diffstat (limited to 'usr.sbin/bluetooth/btpand/client.c')
| -rw-r--r-- | usr.sbin/bluetooth/btpand/client.c | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/usr.sbin/bluetooth/btpand/client.c b/usr.sbin/bluetooth/btpand/client.c new file mode 100644 index 0000000..f88dc6e --- /dev/null +++ b/usr.sbin/bluetooth/btpand/client.c @@ -0,0 +1,228 @@ +/* $NetBSD: client.c,v 1.2 2008/12/06 20:01:14 plunky Exp $ */ + +/*- + * Copyright (c) 2008 Iain Hibbert + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR 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. + */ + +/* $FreeBSD$ */ + +#include <sys/cdefs.h> +__RCSID("$NetBSD: client.c,v 1.2 2008/12/06 20:01:14 plunky Exp $"); + +#define L2CAP_SOCKET_CHECKED +#include <bluetooth.h> +#include <errno.h> +#include <sdp.h> +#include <unistd.h> + +#include "btpand.h" +#include "bnep.h" +#include "sdp.h" + +static void client_query(void); + +void +client_init(void) +{ + struct sockaddr_l2cap sa; + channel_t *chan; + socklen_t len; + int fd, n; + uint16_t mru, mtu; + + if (bdaddr_any(&remote_bdaddr)) + return; + + if (service_name) + client_query(); + + fd = socket(PF_BLUETOOTH, SOCK_SEQPACKET, BLUETOOTH_PROTO_L2CAP); + if (fd == -1) { + log_err("Could not open L2CAP socket: %m"); + exit(EXIT_FAILURE); + } + + memset(&sa, 0, sizeof(sa)); + sa.l2cap_family = AF_BLUETOOTH; + sa.l2cap_len = sizeof(sa); + sa.l2cap_bdaddr_type = BDADDR_BREDR; + sa.l2cap_cid = 0; + + bdaddr_copy(&sa.l2cap_bdaddr, &local_bdaddr); + if (bind(fd, (struct sockaddr *)&sa, sizeof(sa)) == -1) { + log_err("Could not bind client socket: %m"); + exit(EXIT_FAILURE); + } + + mru = BNEP_MTU_MIN; + if (setsockopt(fd, SOL_L2CAP, SO_L2CAP_IMTU, &mru, sizeof(mru)) == -1) { + log_err("Could not set L2CAP IMTU (%d): %m", mru); + exit(EXIT_FAILURE); + } + + log_info("Opening connection to service 0x%4.4x at %s", + service_class, bt_ntoa(&remote_bdaddr, NULL)); + + sa.l2cap_psm = htole16(l2cap_psm); + bdaddr_copy(&sa.l2cap_bdaddr, &remote_bdaddr); + if (connect(fd, (struct sockaddr *)&sa, sizeof(sa)) == -1) { + log_err("Could not connect: %m"); + exit(EXIT_FAILURE); + } + + len = sizeof(mru); + if (getsockopt(fd, SOL_L2CAP, SO_L2CAP_IMTU, &mru, &len) == -1) { + log_err("Could not get IMTU: %m"); + exit(EXIT_FAILURE); + } + if (mru < BNEP_MTU_MIN) { + log_err("L2CAP IMTU too small (%d)", mru); + exit(EXIT_FAILURE); + } + + len = sizeof(n); + if (getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &n, &len) == -1) { + log_err("Could not read SO_RCVBUF"); + exit(EXIT_FAILURE); + } + if (n < (mru * 10)) { + n = mru * 10; + if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &n, sizeof(n)) == -1) + log_info("Could not increase SO_RCVBUF (from %d)", n); + } + + len = sizeof(mtu); + if (getsockopt(fd, SOL_L2CAP, SO_L2CAP_OMTU, &mtu, &len) == -1) { + log_err("Could not get L2CAP OMTU: %m"); + exit(EXIT_FAILURE); + } + if (mtu < BNEP_MTU_MIN) { + log_err("L2CAP OMTU too small (%d)", mtu); + exit(EXIT_FAILURE); + } + + len = sizeof(n); + if (getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &n, &len) == -1) { + log_err("Could not get socket send buffer size: %m"); + close(fd); + return; + } + if (n < (mtu * 2)) { + n = mtu * 2; + if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &n, sizeof(n)) == -1) { + log_err("Could not set socket send buffer size (%d): %m", n); + close(fd); + return; + } + } + n = mtu; + if (setsockopt(fd, SOL_SOCKET, SO_SNDLOWAT, &n, sizeof(n)) == -1) { + log_err("Could not set socket low water mark (%d): %m", n); + close(fd); + return; + } + + chan = channel_alloc(); + if (chan == NULL) + exit(EXIT_FAILURE); + + chan->send = bnep_send; + chan->recv = bnep_recv; + chan->mru = mru; + chan->mtu = mtu; + b2eaddr(chan->raddr, &remote_bdaddr); + b2eaddr(chan->laddr, &local_bdaddr); + chan->state = CHANNEL_WAIT_CONNECT_RSP; + channel_timeout(chan, 10); + if (!channel_open(chan, fd)) + exit(EXIT_FAILURE); + + bnep_send_control(chan, BNEP_SETUP_CONNECTION_REQUEST, + 2, service_class, SDP_SERVICE_CLASS_PANU); +} + +static void +client_query(void) +{ + uint8_t buffer[512]; + sdp_attr_t attr; + uint32_t range; + void *ss; + int rv; + uint8_t *seq0, *seq1; + + attr.flags = SDP_ATTR_INVALID; + attr.attr = 0; + attr.vlen = sizeof(buffer); + attr.value = buffer; + + range = SDP_ATTR_RANGE(SDP_ATTR_PROTOCOL_DESCRIPTOR_LIST, + SDP_ATTR_PROTOCOL_DESCRIPTOR_LIST); + + ss = sdp_open(&local_bdaddr, &remote_bdaddr); + if (ss == NULL || (errno = sdp_error(ss)) != 0) { + log_err("%s: %m", service_name); + exit(EXIT_FAILURE); + } + + log_info("Searching for %s service at %s", + service_name, bt_ntoa(&remote_bdaddr, NULL)); + + rv = sdp_search(ss, 1, &service_class, 1, &range, 1, &attr); + if (rv != 0) { + log_err("%s: %s", service_name, strerror(sdp_error(ss))); + exit(EXIT_FAILURE); + } + + sdp_close(ss); + + if (attr.flags != SDP_ATTR_OK + || attr.attr != SDP_ATTR_PROTOCOL_DESCRIPTOR_LIST) { + log_err("%s service not found", service_name); + exit(EXIT_FAILURE); + } + + /* + * we expect the following protocol descriptor list + * + * seq len + * seq len + * uuid value == L2CAP + * uint16 value16 => PSM + * seq len + * uuid value == BNEP + */ + if (_sdp_get_seq(&attr.value, attr.value + attr.vlen, &seq0) + && _sdp_get_seq(&seq0, attr.value, &seq1) + && _sdp_match_uuid16(&seq1, seq0, SDP_UUID_PROTOCOL_L2CAP) + && _sdp_get_uint16(&seq1, seq0, &l2cap_psm) + && _sdp_get_seq(&seq0, attr.value, &seq1) + && _sdp_match_uuid16(&seq1, seq0, SDP_UUID_PROTOCOL_BNEP)) { + log_info("Found PSM %d for service %s", l2cap_psm, service_name); + return; + } + + log_err("%s query failed", service_name); + exit(EXIT_FAILURE); +} |
