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* BlueZ - Bluetooth protocol stack for Linux
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* Copyright (C) 2002-2003 Maxim Krasnyansky <maxk@qualcomm.com>
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* Copyright (C) 2002-2008 Marcel Holtmann <marcel@holtmann.org>
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#include <sys/socket.h>
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#include <bluetooth/bluetooth.h>
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#include <bluetooth/sco.h>
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static unsigned char *buf;
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/* Default data size */
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static long data_size = 672;
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static bdaddr_t bdaddr;
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static float tv2fl(struct timeval tv)
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return (float)tv.tv_sec + (float)(tv.tv_usec/1000000.0);
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static int do_connect(char *svr)
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struct sockaddr_sco addr;
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struct sco_conninfo conn;
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sk = socket(PF_BLUETOOTH, SOCK_SEQPACKET, BTPROTO_SCO);
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syslog(LOG_ERR, "Can't create socket: %s (%d)",
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strerror(errno), errno);
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/* Bind to local address */
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memset(&addr, 0, sizeof(addr));
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addr.sco_family = AF_BLUETOOTH;
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bacpy(&addr.sco_bdaddr, &bdaddr);
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if (bind(sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
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syslog(LOG_ERR, "Can't bind socket: %s (%d)",
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strerror(errno), errno);
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/* Connect to remote device */
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memset(&addr, 0, sizeof(addr));
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addr.sco_family = AF_BLUETOOTH;
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str2ba(svr, &addr.sco_bdaddr);
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if (connect(sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
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syslog(LOG_ERR, "Can't connect: %s (%d)",
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strerror(errno), errno);
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/* Get connection information */
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memset(&conn, 0, sizeof(conn));
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optlen = sizeof(conn);
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if (getsockopt(sk, SOL_SCO, SCO_CONNINFO, &conn, &optlen) < 0) {
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syslog(LOG_ERR, "Can't get SCO connection information: %s (%d)",
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strerror(errno), errno);
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syslog(LOG_INFO, "Connected [handle %d, class 0x%02x%02x%02x]",
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conn.dev_class[2], conn.dev_class[1], conn.dev_class[0]);
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static void do_listen(void (*handler)(int sk))
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struct sockaddr_sco addr;
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struct sco_conninfo conn;
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sk = socket(PF_BLUETOOTH, SOCK_SEQPACKET, BTPROTO_SCO);
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syslog(LOG_ERR, "Can't create socket: %s (%d)",
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strerror(errno), errno);
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/* Bind to local address */
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memset(&addr, 0, sizeof(addr));
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addr.sco_family = AF_BLUETOOTH;
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bacpy(&addr.sco_bdaddr, &bdaddr);
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if (bind(sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
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syslog(LOG_ERR, "Can't bind socket: %s (%d)",
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strerror(errno), errno);
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/* Listen for connections */
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if (listen(sk, 10)) {
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syslog(LOG_ERR,"Can not listen on the socket: %s (%d)",
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strerror(errno), errno);
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syslog(LOG_INFO,"Waiting for connection ...");
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memset(&addr, 0, sizeof(addr));
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optlen = sizeof(addr);
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nsk = accept(sk, (struct sockaddr *) &addr, &optlen);
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syslog(LOG_ERR,"Accept failed: %s (%d)",
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strerror(errno), errno);
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/* Get connection information */
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memset(&conn, 0, sizeof(conn));
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optlen = sizeof(conn);
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if (getsockopt(nsk, SOL_SCO, SCO_CONNINFO, &conn, &optlen) < 0) {
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syslog(LOG_ERR, "Can't get SCO connection information: %s (%d)",
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strerror(errno), errno);
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ba2str(&addr.sco_bdaddr, ba);
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syslog(LOG_INFO, "Connect from %s [handle %d, class 0x%02x%02x%02x]",
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conn.dev_class[2], conn.dev_class[1], conn.dev_class[0]);
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syslog(LOG_INFO, "Disconnect");
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static void dump_mode(int sk)
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syslog(LOG_INFO,"Receiving ...");
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while ((len = read(sk, buf, data_size)) > 0)
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syslog(LOG_INFO, "Recevied %d bytes", len);
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static void recv_mode(int sk)
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struct timeval tv_beg,tv_end,tv_diff;
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syslog(LOG_INFO, "Receiving ...");
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gettimeofday(&tv_beg, NULL);
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while (total < data_size) {
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if ((r = recv(sk, buf, data_size, 0)) <= 0) {
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syslog(LOG_ERR, "Read failed: %s (%d)",
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strerror(errno), errno);
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gettimeofday(&tv_end, NULL);
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timersub(&tv_end, &tv_beg, &tv_diff);
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syslog(LOG_INFO,"%ld bytes in %.2fm speed %.2f kb", total,
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tv2fl(tv_diff) / 60.0,
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(float)( total / tv2fl(tv_diff) ) / 1024.0 );
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static void send_mode(char *svr)
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struct sco_options so;
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if ((sk = do_connect(svr)) < 0) {
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syslog(LOG_ERR, "Can't connect to the server: %s (%d)",
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strerror(errno), errno);
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if (getsockopt(sk, SOL_SCO, SCO_OPTIONS, &so, &len) < 0) {
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syslog(LOG_ERR, "Can't get SCO options: %s (%d)",
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strerror(errno), errno);
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syslog(LOG_INFO,"Sending ...");
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for (i = 6; i < so.mtu; i++)
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*(uint32_t *) buf = htobl(seq);
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*(uint16_t *) (buf + 4) = htobs(data_size);
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if (send(sk, buf, so.mtu, 0) <= 0) {
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syslog(LOG_ERR, "Send failed: %s (%d)",
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strerror(errno), errno);
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static void reconnect_mode(char *svr)
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if ((sk = do_connect(svr)) < 0) {
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syslog(LOG_ERR, "Can't connect to the server: %s (%d)",
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strerror(errno), errno);
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static void multy_connect_mode(char *svr)
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for (i = 0; i < 10; i++){
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sk = do_connect(svr);
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syslog(LOG_ERR, "Can't connect to the server: %s (%d)",
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strerror(errno), errno);
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static void usage(void)
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printf("scotest - SCO testing\n"
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printf("\tscotest <mode> [-b bytes] [bd_addr]\n");
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"\t-d dump (server)\n"
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"\t-c reconnect (client)\n"
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"\t-m multiple connects (client)\n"
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"\t-r receive (server)\n"
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"\t-s connect and send (client)\n"
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"\t-n connect and be silent (client)\n");
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int main(int argc ,char *argv[])
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int opt, sk, mode = RECV;
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while ((opt=getopt(argc,argv,"rdscmnb:")) != EOF) {
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data_size = atoi(optarg);
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if (!(argc - optind) && (mode != RECV && mode != DUMP)) {
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if (!(buf = malloc(data_size))) {
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perror("Can't allocate data buffer");
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memset(&sa, 0, sizeof(sa));
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sa.sa_handler = SIG_IGN;
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sa.sa_flags = SA_NOCLDSTOP;
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sigaction(SIGCHLD, &sa, NULL);
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openlog("scotest", LOG_PERROR | LOG_PID, LOG_LOCAL0);
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do_listen(recv_mode);
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do_listen(dump_mode);
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send_mode(argv[optind]);
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reconnect_mode(argv[optind]);
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multy_connect_mode(argv[optind]);
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sk = do_connect(argv[optind]);
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syslog(LOG_INFO, "Exit");