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/*
*
* BlueZ - Bluetooth protocol stack for Linux
*
* Copyright (C) 2004-2007 Marcel Holtmann <marcel@holtmann.org>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <stdlib.h>
#include <errno.h>
#include <unistd.h>
#include <stdint.h>
#include <assert.h>
#include <glib.h>
#include "logging.h"
#include "dbus.h"
#include "manager.h"
static int unix_sock = -1;
/* Pass file descriptor through local domain sockets (AF_LOCAL, formerly AF_UNIX)
and the sendmsg() system call with the cmsg_type field of a "struct cmsghdr" set
to SCM_RIGHTS and the data being an integer value equal to the handle of the
file descriptor to be passed.*/
static int unix_sendmsg_fd(int sock, int fd, struct ipc_packet *pkt)
{
char cmsg_b[CMSG_SPACE(sizeof(int))];
struct cmsghdr *cmsg;
struct iovec iov = {
.iov_base = pkt,
.iov_len = sizeof(struct ipc_packet)
};
struct msghdr msgh = {
.msg_name = 0,
.msg_namelen = 0,
.msg_iov = &iov,
.msg_iovlen = 1,
.msg_control = &cmsg_b,
.msg_controllen = CMSG_LEN(sizeof(int)),
.msg_flags = 0
};
cmsg = CMSG_FIRSTHDR(&msgh);
cmsg->cmsg_level = SOL_SOCKET;
cmsg->cmsg_type = SCM_RIGHTS;
cmsg->cmsg_len = CMSG_LEN(sizeof(int));
/* Initialize the payload */
(*(int *) CMSG_DATA(cmsg)) = fd;
return sendmsg(sock, &msgh, MSG_NOSIGNAL);
}
static gboolean unix_event(GIOChannel *chan, GIOCondition cond, gpointer data)
{
struct sockaddr_un addr;
socklen_t addrlen;
struct ipc_packet *pkt;
struct ipc_data_cfg *cfg;
int sk, clisk, len;
debug("chan %p cond %td data %p", chan, cond, data);
if (cond & G_IO_NVAL)
return FALSE;
if (cond & (G_IO_HUP | G_IO_ERR)) {
g_io_channel_close(chan);
return FALSE;
}
sk = g_io_channel_unix_get_fd(chan);
memset(&addr, 0, sizeof(addr));
addrlen = sizeof(addr);
clisk = accept(sk, (struct sockaddr *) &addr, &addrlen);
if (clisk < 0) {
error("accept: %s (%d)", strerror(errno), errno);
return TRUE;
}
len = sizeof(struct ipc_packet) + sizeof(struct ipc_data_cfg);
pkt = g_malloc0(len);
len = recv(clisk, pkt, len, 0);
debug("path %s len %d", addr.sun_path + 1, len);
switch (pkt->type) {
case PKT_TYPE_CFG_REQ:
info("Package PKT_TYPE_CFG_REQ:%u", pkt->role);
cfg = (struct ipc_data_cfg *) pkt->data;
memset(cfg, 0, sizeof(struct ipc_data_cfg));
if (manager_get_device(clisk, pkt->role, cfg) == 0)
unix_send_cfg(clisk, pkt);
break;
case PKT_TYPE_STATUS_REQ:
info("Package PKT_TYPE_STATUS_REQ");
break;
case PKT_TYPE_CTL_REQ:
info("Package PKT_TYPE_CTL_REQ");
break;
}
return TRUE;
}
int unix_init(void)
{
GIOChannel *io;
struct sockaddr_un addr = {
AF_UNIX, IPC_SOCKET_NAME
};
int sk, err;
sk = socket(PF_LOCAL, SOCK_STREAM, 0);
if (sk < 0) {
err = errno;
error("Can't create unix socket: %s (%d)", strerror(err), err);
return -err;
}
if (bind(sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
error("Can't bind unix socket: %s (%d)", strerror(errno), errno);
close(sk);
return -1;
}
set_nonblocking(sk);
unix_sock = sk;
listen(sk, 1);
io = g_io_channel_unix_new(sk);
g_io_add_watch(io, G_IO_IN | G_IO_HUP | G_IO_ERR | G_IO_NVAL,
unix_event, NULL);
g_io_channel_unref(io);
info("Unix socket created: %d", sk);
return 0;
}
void unix_exit(void)
{
close(unix_sock);
unix_sock = -1;
}
int unix_send_cfg(int sock, struct ipc_packet *pkt)
{
struct ipc_data_cfg *cfg = (struct ipc_data_cfg *) pkt->data;
int len;
info("fd=%d, fd_opt=%u, channels=%u, pkt_len=%u, sample_size=%u,"
"rate=%u", cfg->fd, cfg->fd_opt, cfg->channels,
cfg->pkt_len, cfg->sample_size, cfg->rate);
pkt->type = PKT_TYPE_CFG_RSP;
pkt->length = sizeof(struct ipc_data_cfg);
pkt->error = PKT_ERROR_NONE;
len = sizeof(struct ipc_packet) + sizeof(struct ipc_data_cfg);
len = send(sock, pkt, len, 0);
if (len < 0)
info("Error %s(%d)", strerror(errno), errno);
info("%d bytes sent", len);
if (cfg->fd != -1) {
len = unix_sendmsg_fd(sock, cfg->fd, pkt);
if (len < 0)
info("Error %s(%d)", strerror(errno), errno);
info("%d bytes sent", len);
}
g_free(pkt);
close(sock);
return 0;
}
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