| /* |
| * |
| * 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 <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 void cfg_event(int clisk, struct ipc_packet *pkt) |
| { |
| struct ipc_data_cfg *cfg = (struct ipc_data_cfg *) pkt->data; |
| struct device *device; |
| |
| memset(cfg, 0, sizeof(struct ipc_data_cfg)); |
| |
| if ((device = manager_default_device())) { |
| if (device->headset) |
| headset_get_config(device, clisk, pkt); |
| } |
| else |
| cfg->fd = -1; |
| |
| if (cfg->fd != 0) |
| unix_send_cfg(clisk, pkt); |
| } |
| |
| static void ctl_event(int clisk, struct ipc_packet *pkt) |
| { |
| } |
| |
| static void state_event(int clisk, struct ipc_packet *pkt) |
| { |
| struct ipc_data_state *state = (struct ipc_data_state *) pkt->data; |
| struct device *device; |
| |
| if (!(device = manager_default_device())) |
| return; |
| |
| if (device->headset) |
| headset_set_state(device, state->state); |
| |
| unix_send_status(clisk, pkt); |
| |
| g_free(pkt); |
| } |
| |
| static gboolean unix_event(GIOChannel *chan, GIOCondition cond, gpointer data) |
| { |
| struct sockaddr_un addr; |
| socklen_t addrlen; |
| struct ipc_packet *pkt; |
| 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_event(clisk, pkt); |
| break; |
| case PKT_TYPE_STATE_REQ: |
| info("Package PKT_TYPE_STATE_REQ"); |
| state_event(clisk, pkt); |
| break; |
| case PKT_TYPE_CTL_REQ: |
| info("Package PKT_TYPE_CTL_REQ"); |
| ctl_event(clisk, pkt); |
| 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); |
| return 0; |
| } |
| |
| int unix_send_status(int sock, struct ipc_packet *pkt) |
| { |
| struct ipc_data_state *state = (struct ipc_data_state *) pkt->data; |
| int len; |
| |
| info("status=%u", state->state); |
| |
| pkt->type = PKT_TYPE_CFG_RSP; |
| pkt->length = sizeof(struct ipc_data_state); |
| pkt->error = PKT_ERROR_NONE; |
| |
| len = sizeof(struct ipc_packet) + sizeof(struct ipc_data_state); |
| len = send(sock, pkt, len, 0); |
| if (len < 0) |
| info("Error %s(%d)", strerror(errno), errno); |
| |
| info("%d bytes sent", len); |
| |
| g_free(pkt); |
| return 0; |
| } |