1105 lines
26 KiB
C
1105 lines
26 KiB
C
/*
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* ALSA server
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* Copyright (c) by Abramo Bagnara <abramo@alsa-project.org>
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*
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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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*
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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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*
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <sys/shm.h>
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#include <sys/socket.h>
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#include <sys/poll.h>
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#include <sys/un.h>
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#include <sys/uio.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <stddef.h>
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#include <getopt.h>
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#include <netinet/in.h>
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#include <netdb.h>
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#include <limits.h>
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#include <signal.h>
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#include "aserver.h"
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char *command;
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#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 95)
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#define ERROR(...) do {\
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fprintf(stderr, "%s %s:%i:(%s) ", command, __FILE__, __LINE__, __FUNCTION__); \
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fprintf(stderr, __VA_ARGS__); \
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putc('\n', stderr); \
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} while (0)
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#else
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#define ERROR(args...) do {\
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fprintf(stderr, "%s %s:%i:(%s) ", command, __FILE__, __LINE__, __FUNCTION__); \
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fprintf(stderr, ##args); \
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putc('\n', stderr); \
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} while (0)
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#endif
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#define SYSERROR(string) ERROR(string ": %s", strerror(errno))
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static int make_local_socket(const char *filename)
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{
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size_t l = strlen(filename);
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size_t size = offsetof(struct sockaddr_un, sun_path) + l;
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struct sockaddr_un *addr = alloca(size);
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int sock;
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sock = socket(PF_LOCAL, SOCK_STREAM, 0);
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if (sock < 0) {
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int result = -errno;
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SYSERROR("socket failed");
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return result;
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}
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unlink(filename);
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addr->sun_family = AF_LOCAL;
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memcpy(addr->sun_path, filename, l);
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if (bind(sock, (struct sockaddr *) addr, size) < 0) {
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int result = -errno;
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SYSERROR("bind failed");
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return result;
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}
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return sock;
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}
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static int make_inet_socket(int port)
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{
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struct sockaddr_in addr;
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int sock;
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sock = socket(PF_INET, SOCK_STREAM, 0);
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if (sock < 0) {
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int result = -errno;
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SYSERROR("socket failed");
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return result;
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}
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addr.sin_family = AF_INET;
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addr.sin_port = htons(port);
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addr.sin_addr.s_addr = INADDR_ANY;
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if (bind(sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
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int result = -errno;
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SYSERROR("bind failed");
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return result;
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}
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return sock;
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}
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struct pollfd *pollfds;
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unsigned int pollfds_count = 0;
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typedef struct waiter waiter_t;
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typedef int (*waiter_handler_t)(waiter_t *waiter, unsigned short events);
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struct waiter {
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int fd;
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void *private_data;
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waiter_handler_t handler;
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};
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waiter_t *waiters;
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static void add_waiter(int fd, unsigned short events, waiter_handler_t handler,
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void *data)
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{
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waiter_t *w = &waiters[fd];
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struct pollfd *pfd = &pollfds[pollfds_count];
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assert(!w->handler);
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pfd->fd = fd;
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pfd->events = events;
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pfd->revents = 0;
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w->fd = fd;
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w->private_data = data;
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w->handler = handler;
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pollfds_count++;
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}
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static void del_waiter(int fd)
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{
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waiter_t *w = &waiters[fd];
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unsigned int k;
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assert(w->handler);
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w->handler = 0;
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for (k = 0; k < pollfds_count; ++k) {
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if (pollfds[k].fd == fd)
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break;
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}
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assert(k < pollfds_count);
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pollfds_count--;
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memmove(&pollfds[k], &pollfds[k + 1], pollfds_count - k);
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}
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typedef struct client client_t;
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typedef struct {
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int (*open)(client_t *client, int *cookie);
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int (*cmd)(client_t *client);
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int (*close)(client_t *client);
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} transport_ops_t;
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struct client {
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struct list_head list;
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int poll_fd;
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int ctrl_fd;
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int local;
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int transport_type;
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int dev_type;
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char name[256];
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int stream;
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int mode;
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transport_ops_t *ops;
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snd_async_handler_t *async_handler;
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int async_sig;
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pid_t async_pid;
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union {
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struct {
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snd_pcm_t *handle;
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int fd;
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} pcm;
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struct {
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snd_ctl_t *handle;
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int fd;
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} ctl;
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#if 0
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struct {
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snd_rawmidi_t *handle;
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} rawmidi;
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struct {
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snd_timer_open_t *handle;
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} timer;
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struct {
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snd_hwdep_t *handle;
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} hwdep;
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struct {
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snd_seq_t *handle;
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} seq;
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#endif
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} device;
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int polling;
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int open;
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int cookie;
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union {
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struct {
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int ctrl_id;
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void *ctrl;
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} shm;
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} transport;
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};
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LIST_HEAD(clients);
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typedef struct {
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struct list_head list;
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int fd;
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uint32_t cookie;
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} inet_pending_t;
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LIST_HEAD(inet_pendings);
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#if 0
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static int pcm_handler(waiter_t *waiter, unsigned short events)
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{
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client_t *client = waiter->private_data;
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char buf[1];
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ssize_t n;
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if (events & POLLIN) {
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n = write(client->poll_fd, buf, 1);
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if (n != 1) {
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SYSERROR("write failed");
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return -errno;
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}
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} else if (events & POLLOUT) {
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n = read(client->poll_fd, buf, 1);
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if (n != 1) {
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SYSERROR("read failed");
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return -errno;
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}
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}
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del_waiter(waiter->fd);
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client->polling = 0;
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return 0;
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}
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#endif
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static void pcm_shm_hw_ptr_changed(snd_pcm_t *pcm, snd_pcm_t *src ATTRIBUTE_UNUSED)
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{
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client_t *client = pcm->hw.private_data;
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volatile snd_pcm_shm_ctrl_t *ctrl = client->transport.shm.ctrl;
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snd_pcm_t *loop;
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ctrl->hw.changed = 1;
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if (pcm->hw.fd >= 0) {
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ctrl->hw.use_mmap = 1;
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ctrl->hw.offset = pcm->hw.offset;
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return;
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}
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ctrl->hw.use_mmap = 0;
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ctrl->hw.ptr = pcm->hw.ptr ? *pcm->hw.ptr : 0;
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for (loop = pcm->hw.master; loop; loop = loop->hw.master)
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loop->hw.ptr = &ctrl->hw.ptr;
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pcm->hw.ptr = &ctrl->hw.ptr;
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}
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static void pcm_shm_appl_ptr_changed(snd_pcm_t *pcm, snd_pcm_t *src ATTRIBUTE_UNUSED)
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{
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client_t *client = pcm->appl.private_data;
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volatile snd_pcm_shm_ctrl_t *ctrl = client->transport.shm.ctrl;
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snd_pcm_t *loop;
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ctrl->appl.changed = 1;
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if (pcm->appl.fd >= 0) {
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ctrl->appl.use_mmap = 1;
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ctrl->appl.offset = pcm->appl.offset;
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return;
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}
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ctrl->appl.use_mmap = 0;
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ctrl->appl.ptr = pcm->appl.ptr ? *pcm->appl.ptr : 0;
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for (loop = pcm->appl.master; loop; loop = loop->appl.master)
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loop->appl.ptr = &ctrl->appl.ptr;
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pcm->appl.ptr = &ctrl->appl.ptr;
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}
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static int pcm_shm_open(client_t *client, int *cookie)
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{
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int shmid;
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snd_pcm_t *pcm;
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int err;
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int result;
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err = snd_pcm_open(&pcm, client->name, client->stream, SND_PCM_NONBLOCK);
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if (err < 0)
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return err;
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client->device.pcm.handle = pcm;
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client->device.pcm.fd = _snd_pcm_poll_descriptor(pcm);
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pcm->hw.private_data = client;
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pcm->hw.changed = pcm_shm_hw_ptr_changed;
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pcm->appl.private_data = client;
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pcm->appl.changed = pcm_shm_appl_ptr_changed;
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shmid = shmget(IPC_PRIVATE, PCM_SHM_SIZE, 0666);
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if (shmid < 0) {
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result = -errno;
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SYSERROR("shmget failed");
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goto _err;
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}
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client->transport.shm.ctrl_id = shmid;
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client->transport.shm.ctrl = shmat(shmid, 0, 0);
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if (client->transport.shm.ctrl == (void*) -1) {
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result = -errno;
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shmctl(shmid, IPC_RMID, 0);
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SYSERROR("shmat failed");
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goto _err;
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}
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*cookie = shmid;
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return 0;
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_err:
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snd_pcm_close(pcm);
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return result;
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}
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static int pcm_shm_close(client_t *client)
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{
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int err;
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snd_pcm_shm_ctrl_t *ctrl = client->transport.shm.ctrl;
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if (client->polling) {
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del_waiter(client->device.pcm.fd);
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client->polling = 0;
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}
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err = snd_pcm_close(client->device.pcm.handle);
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ctrl->result = err;
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if (err < 0)
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ERROR("snd_pcm_close");
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if (client->transport.shm.ctrl) {
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err = shmdt((void *)client->transport.shm.ctrl);
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if (err < 0)
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SYSERROR("shmdt failed");
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err = shmctl(client->transport.shm.ctrl_id, IPC_RMID, 0);
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if (err < 0)
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SYSERROR("shmctl IPC_RMID failed");
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client->transport.shm.ctrl = 0;
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}
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client->open = 0;
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return 0;
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}
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static int shm_ack(client_t *client)
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{
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struct pollfd pfd;
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int err;
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char buf[1];
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pfd.fd = client->ctrl_fd;
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pfd.events = POLLHUP;
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if (poll(&pfd, 1, 0) == 1)
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return -EBADFD;
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err = write(client->ctrl_fd, buf, 1);
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if (err != 1)
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return -EBADFD;
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return 0;
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}
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static int shm_ack_fd(client_t *client, int fd)
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{
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struct pollfd pfd;
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int err;
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char buf[1];
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pfd.fd = client->ctrl_fd;
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pfd.events = POLLHUP;
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if (poll(&pfd, 1, 0) == 1)
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return -EBADFD;
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err = snd_send_fd(client->ctrl_fd, buf, 1, fd);
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if (err != 1)
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return -EBADFD;
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return 0;
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}
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static int shm_rbptr_fd(client_t *client, snd_pcm_rbptr_t *rbptr)
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{
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if (rbptr->fd < 0)
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return -EINVAL;
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return shm_ack_fd(client, rbptr->fd);
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}
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static void async_handler(snd_async_handler_t *handler)
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{
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client_t *client = snd_async_handler_get_callback_private(handler);
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/* FIXME: use sigqueue */
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kill(client->async_pid, client->async_sig);
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}
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static int pcm_shm_cmd(client_t *client)
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{
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volatile snd_pcm_shm_ctrl_t *ctrl = client->transport.shm.ctrl;
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char buf[1];
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int err;
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int cmd;
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snd_pcm_t *pcm;
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err = read(client->ctrl_fd, buf, 1);
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if (err != 1)
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return -EBADFD;
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cmd = ctrl->cmd;
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ctrl->cmd = 0;
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pcm = client->device.pcm.handle;
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switch (cmd) {
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case SND_PCM_IOCTL_ASYNC:
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ctrl->result = snd_pcm_async(pcm, ctrl->u.async.sig, ctrl->u.async.pid);
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if (ctrl->result < 0)
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break;
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if (ctrl->u.async.sig >= 0) {
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assert(client->async_sig < 0);
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ctrl->result = snd_async_add_pcm_handler(&client->async_handler, pcm, async_handler, client);
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if (ctrl->result < 0)
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break;
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} else {
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assert(client->async_sig >= 0);
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snd_async_del_handler(client->async_handler);
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}
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client->async_sig = ctrl->u.async.sig;
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client->async_pid = ctrl->u.async.pid;
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break;
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case SNDRV_PCM_IOCTL_INFO:
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ctrl->result = snd_pcm_info(pcm, (snd_pcm_info_t *) &ctrl->u.info);
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break;
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case SNDRV_PCM_IOCTL_HW_REFINE:
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ctrl->result = snd_pcm_hw_refine(pcm, (snd_pcm_hw_params_t *) &ctrl->u.hw_refine);
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break;
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case SNDRV_PCM_IOCTL_HW_PARAMS:
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ctrl->result = snd_pcm_hw_params(pcm, (snd_pcm_hw_params_t *) &ctrl->u.hw_params);
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break;
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case SNDRV_PCM_IOCTL_HW_FREE:
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ctrl->result = snd_pcm_hw_free(pcm);
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break;
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case SNDRV_PCM_IOCTL_SW_PARAMS:
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ctrl->result = snd_pcm_sw_params(pcm, (snd_pcm_sw_params_t *) &ctrl->u.sw_params);
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break;
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case SNDRV_PCM_IOCTL_STATUS:
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ctrl->result = snd_pcm_status(pcm, (snd_pcm_status_t *) &ctrl->u.status);
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break;
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case SND_PCM_IOCTL_STATE:
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ctrl->result = snd_pcm_state(pcm);
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break;
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case SND_PCM_IOCTL_HWSYNC:
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ctrl->result = snd_pcm_hwsync(pcm);
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break;
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case SNDRV_PCM_IOCTL_DELAY:
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ctrl->result = snd_pcm_delay(pcm, (snd_pcm_sframes_t *) &ctrl->u.delay.frames);
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break;
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case SND_PCM_IOCTL_AVAIL_UPDATE:
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ctrl->result = snd_pcm_avail_update(pcm);
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break;
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case SNDRV_PCM_IOCTL_PREPARE:
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ctrl->result = snd_pcm_prepare(pcm);
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break;
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case SNDRV_PCM_IOCTL_RESET:
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ctrl->result = snd_pcm_reset(pcm);
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break;
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case SNDRV_PCM_IOCTL_START:
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ctrl->result = snd_pcm_start(pcm);
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break;
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case SNDRV_PCM_IOCTL_DRAIN:
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ctrl->result = snd_pcm_drain(pcm);
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break;
|
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case SNDRV_PCM_IOCTL_DROP:
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ctrl->result = snd_pcm_drop(pcm);
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break;
|
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case SNDRV_PCM_IOCTL_PAUSE:
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ctrl->result = snd_pcm_pause(pcm, ctrl->u.pause.enable);
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break;
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case SNDRV_PCM_IOCTL_CHANNEL_INFO:
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ctrl->result = snd_pcm_channel_info(pcm, (snd_pcm_channel_info_t *) &ctrl->u.channel_info);
|
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if (ctrl->result >= 0 &&
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ctrl->u.channel_info.type == SND_PCM_AREA_MMAP)
|
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return shm_ack_fd(client, ctrl->u.channel_info.u.mmap.fd);
|
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break;
|
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case SNDRV_PCM_IOCTL_REWIND:
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ctrl->result = snd_pcm_rewind(pcm, ctrl->u.rewind.frames);
|
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break;
|
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case SND_PCM_IOCTL_FORWARD:
|
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ctrl->result = snd_pcm_forward(pcm, ctrl->u.forward.frames);
|
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break;
|
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case SNDRV_PCM_IOCTL_LINK:
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{
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/* FIXME */
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ctrl->result = -ENOSYS;
|
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break;
|
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}
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case SNDRV_PCM_IOCTL_UNLINK:
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ctrl->result = snd_pcm_unlink(pcm);
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break;
|
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case SNDRV_PCM_IOCTL_RESUME:
|
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ctrl->result = snd_pcm_resume(pcm);
|
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break;
|
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case SND_PCM_IOCTL_MMAP:
|
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{
|
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ctrl->result = snd_pcm_mmap(pcm);
|
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}
|
|
case SND_PCM_IOCTL_MUNMAP:
|
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{
|
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ctrl->result = snd_pcm_munmap(pcm);
|
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break;
|
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}
|
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case SND_PCM_IOCTL_MMAP_COMMIT:
|
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ctrl->result = snd_pcm_mmap_commit(pcm,
|
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ctrl->u.mmap_commit.offset,
|
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ctrl->u.mmap_commit.frames);
|
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break;
|
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case SND_PCM_IOCTL_POLL_DESCRIPTOR:
|
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ctrl->result = 0;
|
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return shm_ack_fd(client, _snd_pcm_poll_descriptor(pcm));
|
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case SND_PCM_IOCTL_CLOSE:
|
|
client->ops->close(client);
|
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break;
|
|
case SND_PCM_IOCTL_HW_PTR_FD:
|
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return shm_rbptr_fd(client, &pcm->hw);
|
|
case SND_PCM_IOCTL_APPL_PTR_FD:
|
|
return shm_rbptr_fd(client, &pcm->appl);
|
|
default:
|
|
ERROR("Bogus cmd: %x", ctrl->cmd);
|
|
ctrl->result = -ENOSYS;
|
|
}
|
|
return shm_ack(client);
|
|
}
|
|
|
|
transport_ops_t pcm_shm_ops = {
|
|
.open = pcm_shm_open,
|
|
.cmd = pcm_shm_cmd,
|
|
.close = pcm_shm_close,
|
|
};
|
|
|
|
static int ctl_handler(waiter_t *waiter, unsigned short events)
|
|
{
|
|
client_t *client = waiter->private_data;
|
|
char buf[1];
|
|
ssize_t n;
|
|
if (events & POLLIN) {
|
|
n = write(client->poll_fd, buf, 1);
|
|
if (n != 1) {
|
|
SYSERROR("write failed");
|
|
return -errno;
|
|
}
|
|
}
|
|
del_waiter(waiter->fd);
|
|
client->polling = 0;
|
|
return 0;
|
|
}
|
|
|
|
static int ctl_shm_open(client_t *client, int *cookie)
|
|
{
|
|
int shmid;
|
|
snd_ctl_t *ctl;
|
|
int err;
|
|
int result;
|
|
err = snd_ctl_open(&ctl, client->name, SND_CTL_NONBLOCK);
|
|
if (err < 0)
|
|
return err;
|
|
client->device.ctl.handle = ctl;
|
|
client->device.ctl.fd = _snd_ctl_poll_descriptor(ctl);
|
|
|
|
shmid = shmget(IPC_PRIVATE, CTL_SHM_SIZE, 0666);
|
|
if (shmid < 0) {
|
|
result = -errno;
|
|
SYSERROR("shmget failed");
|
|
goto _err;
|
|
}
|
|
client->transport.shm.ctrl_id = shmid;
|
|
client->transport.shm.ctrl = shmat(shmid, 0, 0);
|
|
if (!client->transport.shm.ctrl) {
|
|
result = -errno;
|
|
shmctl(shmid, IPC_RMID, 0);
|
|
SYSERROR("shmat failed");
|
|
goto _err;
|
|
}
|
|
*cookie = shmid;
|
|
add_waiter(client->device.ctl.fd, POLLIN, ctl_handler, client);
|
|
client->polling = 1;
|
|
return 0;
|
|
|
|
_err:
|
|
snd_ctl_close(ctl);
|
|
return result;
|
|
|
|
}
|
|
|
|
static int ctl_shm_close(client_t *client)
|
|
{
|
|
int err;
|
|
snd_ctl_shm_ctrl_t *ctrl = client->transport.shm.ctrl;
|
|
if (client->polling) {
|
|
del_waiter(client->device.ctl.fd);
|
|
client->polling = 0;
|
|
}
|
|
err = snd_ctl_close(client->device.ctl.handle);
|
|
ctrl->result = err;
|
|
if (err < 0)
|
|
ERROR("snd_ctl_close");
|
|
if (client->transport.shm.ctrl) {
|
|
err = shmdt((void *)client->transport.shm.ctrl);
|
|
if (err < 0)
|
|
SYSERROR("shmdt failed");
|
|
err = shmctl(client->transport.shm.ctrl_id, IPC_RMID, 0);
|
|
if (err < 0)
|
|
SYSERROR("shmctl failed");
|
|
client->transport.shm.ctrl = 0;
|
|
}
|
|
client->open = 0;
|
|
return 0;
|
|
}
|
|
|
|
static int ctl_shm_cmd(client_t *client)
|
|
{
|
|
snd_ctl_shm_ctrl_t *ctrl = client->transport.shm.ctrl;
|
|
char buf[1];
|
|
int err;
|
|
int cmd;
|
|
snd_ctl_t *ctl;
|
|
err = read(client->ctrl_fd, buf, 1);
|
|
if (err != 1)
|
|
return -EBADFD;
|
|
cmd = ctrl->cmd;
|
|
ctrl->cmd = 0;
|
|
ctl = client->device.ctl.handle;
|
|
switch (cmd) {
|
|
case SND_CTL_IOCTL_ASYNC:
|
|
ctrl->result = snd_ctl_async(ctl, ctrl->u.async.sig, ctrl->u.async.pid);
|
|
if (ctrl->result < 0)
|
|
break;
|
|
if (ctrl->u.async.sig >= 0) {
|
|
assert(client->async_sig < 0);
|
|
ctrl->result = snd_async_add_ctl_handler(&client->async_handler, ctl, async_handler, client);
|
|
if (ctrl->result < 0)
|
|
break;
|
|
} else {
|
|
assert(client->async_sig >= 0);
|
|
snd_async_del_handler(client->async_handler);
|
|
}
|
|
client->async_sig = ctrl->u.async.sig;
|
|
client->async_pid = ctrl->u.async.pid;
|
|
break;
|
|
break;
|
|
case SNDRV_CTL_IOCTL_SUBSCRIBE_EVENTS:
|
|
ctrl->result = snd_ctl_subscribe_events(ctl, ctrl->u.subscribe_events);
|
|
break;
|
|
case SNDRV_CTL_IOCTL_CARD_INFO:
|
|
ctrl->result = snd_ctl_card_info(ctl, &ctrl->u.card_info);
|
|
break;
|
|
case SNDRV_CTL_IOCTL_ELEM_LIST:
|
|
{
|
|
size_t maxsize = CTL_SHM_DATA_MAXLEN;
|
|
if (ctrl->u.element_list.space * sizeof(*ctrl->u.element_list.pids) > maxsize) {
|
|
ctrl->result = -EFAULT;
|
|
break;
|
|
}
|
|
ctrl->u.element_list.pids = (snd_ctl_elem_id_t*) ctrl->data;
|
|
ctrl->result = snd_ctl_elem_list(ctl, &ctrl->u.element_list);
|
|
break;
|
|
}
|
|
case SNDRV_CTL_IOCTL_ELEM_INFO:
|
|
ctrl->result = snd_ctl_elem_info(ctl, &ctrl->u.element_info);
|
|
break;
|
|
case SNDRV_CTL_IOCTL_ELEM_READ:
|
|
ctrl->result = snd_ctl_elem_read(ctl, &ctrl->u.element_read);
|
|
break;
|
|
case SNDRV_CTL_IOCTL_ELEM_WRITE:
|
|
ctrl->result = snd_ctl_elem_write(ctl, &ctrl->u.element_write);
|
|
break;
|
|
case SNDRV_CTL_IOCTL_ELEM_LOCK:
|
|
ctrl->result = snd_ctl_elem_lock(ctl, &ctrl->u.element_lock);
|
|
break;
|
|
case SNDRV_CTL_IOCTL_ELEM_UNLOCK:
|
|
ctrl->result = snd_ctl_elem_unlock(ctl, &ctrl->u.element_unlock);
|
|
break;
|
|
case SNDRV_CTL_IOCTL_HWDEP_NEXT_DEVICE:
|
|
ctrl->result = snd_ctl_hwdep_next_device(ctl, &ctrl->u.device);
|
|
break;
|
|
case SNDRV_CTL_IOCTL_HWDEP_INFO:
|
|
ctrl->result = snd_ctl_hwdep_info(ctl, &ctrl->u.hwdep_info);
|
|
break;
|
|
case SNDRV_CTL_IOCTL_PCM_NEXT_DEVICE:
|
|
ctrl->result = snd_ctl_pcm_next_device(ctl, &ctrl->u.device);
|
|
break;
|
|
case SNDRV_CTL_IOCTL_PCM_INFO:
|
|
ctrl->result = snd_ctl_pcm_info(ctl, &ctrl->u.pcm_info);
|
|
break;
|
|
case SNDRV_CTL_IOCTL_PCM_PREFER_SUBDEVICE:
|
|
ctrl->result = snd_ctl_pcm_prefer_subdevice(ctl, ctrl->u.pcm_prefer_subdevice);
|
|
break;
|
|
case SNDRV_CTL_IOCTL_RAWMIDI_NEXT_DEVICE:
|
|
ctrl->result = snd_ctl_rawmidi_next_device(ctl, &ctrl->u.device);
|
|
break;
|
|
case SNDRV_CTL_IOCTL_RAWMIDI_INFO:
|
|
ctrl->result = snd_ctl_rawmidi_info(ctl, &ctrl->u.rawmidi_info);
|
|
break;
|
|
case SNDRV_CTL_IOCTL_RAWMIDI_PREFER_SUBDEVICE:
|
|
ctrl->result = snd_ctl_rawmidi_prefer_subdevice(ctl, ctrl->u.rawmidi_prefer_subdevice);
|
|
break;
|
|
case SNDRV_CTL_IOCTL_POWER:
|
|
ctrl->result = snd_ctl_set_power_state(ctl, ctrl->u.power_state);
|
|
break;
|
|
case SNDRV_CTL_IOCTL_POWER_STATE:
|
|
ctrl->result = snd_ctl_get_power_state(ctl, &ctrl->u.power_state);
|
|
break;
|
|
case SND_CTL_IOCTL_READ:
|
|
ctrl->result = snd_ctl_read(ctl, &ctrl->u.read);
|
|
break;
|
|
case SND_CTL_IOCTL_CLOSE:
|
|
client->ops->close(client);
|
|
break;
|
|
case SND_CTL_IOCTL_POLL_DESCRIPTOR:
|
|
ctrl->result = 0;
|
|
return shm_ack_fd(client, _snd_ctl_poll_descriptor(ctl));
|
|
default:
|
|
ERROR("Bogus cmd: %x", ctrl->cmd);
|
|
ctrl->result = -ENOSYS;
|
|
}
|
|
return shm_ack(client);
|
|
}
|
|
|
|
transport_ops_t ctl_shm_ops = {
|
|
.open = ctl_shm_open,
|
|
.cmd = ctl_shm_cmd,
|
|
.close = ctl_shm_close,
|
|
};
|
|
|
|
static int snd_client_open(client_t *client)
|
|
{
|
|
int err;
|
|
snd_client_open_request_t req;
|
|
snd_client_open_answer_t ans;
|
|
char *name;
|
|
memset(&ans, 0, sizeof(ans));
|
|
err = read(client->ctrl_fd, &req, sizeof(req));
|
|
if (err < 0) {
|
|
SYSERROR("read failed");
|
|
exit(1);
|
|
}
|
|
if (err != sizeof(req)) {
|
|
ans.result = -EINVAL;
|
|
goto _answer;
|
|
}
|
|
name = alloca(req.namelen);
|
|
err = read(client->ctrl_fd, name, req.namelen);
|
|
if (err < 0) {
|
|
SYSERROR("read failed");
|
|
exit(1);
|
|
}
|
|
if (err != req.namelen) {
|
|
ans.result = -EINVAL;
|
|
goto _answer;
|
|
}
|
|
|
|
switch (req.transport_type) {
|
|
case SND_TRANSPORT_TYPE_SHM:
|
|
if (!client->local) {
|
|
ans.result = -EINVAL;
|
|
goto _answer;
|
|
}
|
|
switch (req.dev_type) {
|
|
case SND_DEV_TYPE_PCM:
|
|
client->ops = &pcm_shm_ops;
|
|
break;
|
|
case SND_DEV_TYPE_CONTROL:
|
|
client->ops = &ctl_shm_ops;
|
|
break;
|
|
default:
|
|
ans.result = -EINVAL;
|
|
goto _answer;
|
|
}
|
|
break;
|
|
default:
|
|
ans.result = -EINVAL;
|
|
goto _answer;
|
|
}
|
|
|
|
name[req.namelen] = '\0';
|
|
|
|
client->transport_type = req.transport_type;
|
|
strcpy(client->name, name);
|
|
client->stream = req.stream;
|
|
client->mode = req.mode;
|
|
|
|
err = client->ops->open(client, &ans.cookie);
|
|
if (err < 0) {
|
|
ans.result = err;
|
|
} else {
|
|
client->open = 1;
|
|
ans.result = 0;
|
|
}
|
|
|
|
_answer:
|
|
err = write(client->ctrl_fd, &ans, sizeof(ans));
|
|
if (err != sizeof(ans)) {
|
|
SYSERROR("write failed");
|
|
exit(1);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int client_poll_handler(waiter_t *waiter, unsigned short events ATTRIBUTE_UNUSED)
|
|
{
|
|
client_t *client = waiter->private_data;
|
|
if (client->open)
|
|
client->ops->close(client);
|
|
close(client->poll_fd);
|
|
close(client->ctrl_fd);
|
|
del_waiter(client->poll_fd);
|
|
del_waiter(client->ctrl_fd);
|
|
list_del(&client->list);
|
|
free(client);
|
|
return 0;
|
|
}
|
|
|
|
static int client_ctrl_handler(waiter_t *waiter, unsigned short events)
|
|
{
|
|
client_t *client = waiter->private_data;
|
|
if (events & POLLHUP) {
|
|
if (client->open)
|
|
client->ops->close(client);
|
|
close(client->ctrl_fd);
|
|
del_waiter(client->ctrl_fd);
|
|
list_del(&client->list);
|
|
free(client);
|
|
return 0;
|
|
}
|
|
if (client->open)
|
|
return client->ops->cmd(client);
|
|
else
|
|
return snd_client_open(client);
|
|
}
|
|
|
|
static int inet_pending_handler(waiter_t *waiter, unsigned short events)
|
|
{
|
|
inet_pending_t *pending = waiter->private_data;
|
|
inet_pending_t *pdata;
|
|
client_t *client;
|
|
uint32_t cookie;
|
|
struct list_head *item;
|
|
int remove = 0;
|
|
if (events & POLLHUP)
|
|
remove = 1;
|
|
else {
|
|
int err = read(waiter->fd, &cookie, sizeof(cookie));
|
|
if (err != sizeof(cookie))
|
|
remove = 1;
|
|
else {
|
|
err = write(waiter->fd, &cookie, sizeof(cookie));
|
|
if (err != sizeof(cookie))
|
|
remove = 1;
|
|
}
|
|
}
|
|
del_waiter(waiter->fd);
|
|
if (remove) {
|
|
close(waiter->fd);
|
|
list_del(&pending->list);
|
|
free(pending);
|
|
return 0;
|
|
}
|
|
|
|
list_for_each(item, &inet_pendings) {
|
|
pdata = list_entry(item, inet_pending_t, list);
|
|
if (pdata->cookie == cookie)
|
|
goto found;
|
|
}
|
|
pending->cookie = cookie;
|
|
return 0;
|
|
|
|
found:
|
|
client = calloc(1, sizeof(*client));
|
|
client->local = 0;
|
|
client->poll_fd = pdata->fd;
|
|
client->ctrl_fd = waiter->fd;
|
|
add_waiter(client->ctrl_fd, POLLIN | POLLHUP, client_ctrl_handler, client);
|
|
add_waiter(client->poll_fd, POLLHUP, client_poll_handler, client);
|
|
client->open = 0;
|
|
list_add_tail(&client->list, &clients);
|
|
list_del(&pending->list);
|
|
list_del(&pdata->list);
|
|
free(pending);
|
|
free(pdata);
|
|
return 0;
|
|
}
|
|
|
|
static int local_handler(waiter_t *waiter, unsigned short events ATTRIBUTE_UNUSED)
|
|
{
|
|
int sock;
|
|
sock = accept(waiter->fd, 0, 0);
|
|
if (sock < 0) {
|
|
int result = -errno;
|
|
SYSERROR("accept failed");
|
|
return result;
|
|
} else {
|
|
client_t *client = calloc(1, sizeof(*client));
|
|
client->ctrl_fd = sock;
|
|
client->local = 1;
|
|
client->open = 0;
|
|
add_waiter(sock, POLLIN | POLLHUP, client_ctrl_handler, client);
|
|
list_add_tail(&client->list, &clients);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int inet_handler(waiter_t *waiter, unsigned short events ATTRIBUTE_UNUSED)
|
|
{
|
|
int sock;
|
|
sock = accept(waiter->fd, 0, 0);
|
|
if (sock < 0) {
|
|
int result = -errno;
|
|
SYSERROR("accept failed");
|
|
return result;
|
|
} else {
|
|
inet_pending_t *pending = calloc(1, sizeof(*pending));
|
|
pending->fd = sock;
|
|
pending->cookie = 0;
|
|
add_waiter(sock, POLLIN, inet_pending_handler, pending);
|
|
list_add_tail(&pending->list, &inet_pendings);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int server(const char *sockname, int port)
|
|
{
|
|
int err;
|
|
unsigned int k;
|
|
long open_max;
|
|
int result;
|
|
|
|
if (!sockname && port < 0)
|
|
return -EINVAL;
|
|
open_max = sysconf(_SC_OPEN_MAX);
|
|
if (open_max < 0) {
|
|
result = -errno;
|
|
SYSERROR("sysconf failed");
|
|
return result;
|
|
}
|
|
pollfds = calloc((size_t) open_max, sizeof(*pollfds));
|
|
waiters = calloc((size_t) open_max, sizeof(*waiters));
|
|
|
|
if (sockname) {
|
|
int sock = make_local_socket(sockname);
|
|
if (sock < 0)
|
|
return sock;
|
|
if (fcntl(sock, F_SETFL, O_NONBLOCK) < 0) {
|
|
result = -errno;
|
|
SYSERROR("fcntl O_NONBLOCK failed");
|
|
goto _end;
|
|
}
|
|
if (listen(sock, 4) < 0) {
|
|
result = -errno;
|
|
SYSERROR("listen failed");
|
|
goto _end;
|
|
}
|
|
add_waiter(sock, POLLIN, local_handler, NULL);
|
|
}
|
|
if (port >= 0) {
|
|
int sock = make_inet_socket(port);
|
|
if (sock < 0)
|
|
return sock;
|
|
if (fcntl(sock, F_SETFL, O_NONBLOCK) < 0) {
|
|
result = -errno;
|
|
SYSERROR("fcntl failed");
|
|
goto _end;
|
|
}
|
|
if (listen(sock, 4) < 0) {
|
|
result = -errno;
|
|
SYSERROR("listen failed");
|
|
goto _end;
|
|
}
|
|
add_waiter(sock, POLLIN, inet_handler, NULL);
|
|
}
|
|
|
|
while (1) {
|
|
struct pollfd pfds[open_max];
|
|
size_t pfds_count;
|
|
do {
|
|
err = poll(pollfds, pollfds_count, -1);
|
|
} while (err == 0);
|
|
if (err < 0) {
|
|
SYSERROR("poll failed");
|
|
continue;
|
|
}
|
|
|
|
pfds_count = pollfds_count;
|
|
memcpy(pfds, pollfds, sizeof(*pfds) * pfds_count);
|
|
for (k = 0; k < pfds_count; k++) {
|
|
struct pollfd *pfd = &pfds[k];
|
|
if (pfd->revents) {
|
|
waiter_t *w = &waiters[pfd->fd];
|
|
if (!w->handler)
|
|
continue;
|
|
err = w->handler(w, pfd->revents);
|
|
if (err < 0)
|
|
ERROR("waiter handler failed");
|
|
}
|
|
}
|
|
}
|
|
_end:
|
|
free(pollfds);
|
|
free(waiters);
|
|
return result;
|
|
}
|
|
|
|
|
|
static void usage(void)
|
|
{
|
|
fprintf(stderr,
|
|
"Usage: %s [OPTIONS] server\n"
|
|
"--help help\n",
|
|
command);
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
static const struct option long_options[] = {
|
|
{"help", 0, 0, 'h'},
|
|
{ 0 , 0 , 0, 0 }
|
|
};
|
|
int c;
|
|
snd_config_t *conf;
|
|
snd_config_iterator_t i, next;
|
|
const char *sockname = NULL;
|
|
const char *host = NULL;
|
|
long port = -1;
|
|
int err;
|
|
char *srvname;
|
|
struct hostent *h;
|
|
command = argv[0];
|
|
while ((c = getopt_long(argc, argv, "h", long_options, 0)) != -1) {
|
|
switch (c) {
|
|
case 'h':
|
|
usage();
|
|
return 0;
|
|
default:
|
|
fprintf(stderr, "Try `%s --help' for more information\n", command);
|
|
return 1;
|
|
}
|
|
}
|
|
if (argc - optind != 1) {
|
|
ERROR("you need to specify server name");
|
|
return 1;
|
|
}
|
|
err = snd_config_update();
|
|
if (err < 0) {
|
|
ERROR("cannot read configuration file");
|
|
return 1;
|
|
}
|
|
srvname = argv[optind];
|
|
err = snd_config_search_definition(snd_config, "server", srvname, &conf);
|
|
if (err < 0) {
|
|
ERROR("Missing definition for server %s", srvname);
|
|
return 1;
|
|
}
|
|
if (snd_config_get_type(conf) != SND_CONFIG_TYPE_COMPOUND) {
|
|
SNDERR("Invalid type for server %s definition", srvname);
|
|
return -EINVAL;
|
|
}
|
|
snd_config_for_each(i, next, conf) {
|
|
snd_config_t *n = snd_config_iterator_entry(i);
|
|
const char *id;
|
|
if (snd_config_get_id(n, &id) < 0)
|
|
continue;
|
|
if (strcmp(id, "comment") == 0)
|
|
continue;
|
|
if (strcmp(id, "host") == 0) {
|
|
err = snd_config_get_string(n, &host);
|
|
if (err < 0) {
|
|
ERROR("Invalid type for %s", id);
|
|
return 1;
|
|
}
|
|
continue;
|
|
}
|
|
if (strcmp(id, "socket") == 0) {
|
|
err = snd_config_get_string(n, &sockname);
|
|
if (err < 0) {
|
|
ERROR("Invalid type for %s", id);
|
|
return 1;
|
|
}
|
|
continue;
|
|
}
|
|
if (strcmp(id, "port") == 0) {
|
|
err = snd_config_get_integer(n, &port);
|
|
if (err < 0) {
|
|
ERROR("Invalid type for %s", id);
|
|
return 1;
|
|
}
|
|
continue;
|
|
}
|
|
ERROR("Unknown field %s", id);
|
|
return 1;
|
|
}
|
|
if (!host) {
|
|
ERROR("host is not defined");
|
|
return 1;
|
|
}
|
|
h = gethostbyname(host);
|
|
if (!h) {
|
|
ERROR("Cannot resolve %s", host);
|
|
return 1;
|
|
}
|
|
if (!snd_is_local(h)) {
|
|
ERROR("%s is not the local host", host);
|
|
return 1;
|
|
}
|
|
if (!sockname && port < 0) {
|
|
ERROR("either socket or port need to be defined");
|
|
return 1;
|
|
}
|
|
server(sockname, port);
|
|
return 0;
|
|
}
|