mirror of
https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
synced 2025-11-06 13:29:56 -05:00
Add module-tunnel
add proper locking when autospawning a daemon git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@245 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Lennart Poettering
parent
450ad85b35
commit
6f59ae1763
14 changed files with 554 additions and 59 deletions
423
polyp/module-tunnel.c
Normal file
423
polyp/module-tunnel.c
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@ -0,0 +1,423 @@
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/* $Id$ */
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/***
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This file is part of polypaudio.
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polypaudio 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
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by the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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polypaudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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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 polypaudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <unistd.h>
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#include <assert.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <regex.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "module.h"
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#include "util.h"
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#include "modargs.h"
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#include "log.h"
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#include "subscribe.h"
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#include "xmalloc.h"
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#include "sink-input.h"
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#include "pdispatch.h"
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#include "pstream.h"
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#include "pstream-util.h"
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#include "authkey.h"
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#include "socket-client.h"
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#include "socket-util.h"
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PA_MODULE_AUTHOR("Lennart Poettering")
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PA_MODULE_DESCRIPTION("Tunnel module")
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PA_MODULE_USAGE("server=<filename> sink=<remote sink name> cookie=<filename> format=<sample format> channels=<number of channels> rate=<sample rate> sink_name=<name for the local sink>")
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PA_MODULE_VERSION(PACKAGE_VERSION)
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#define DEFAULT_SINK_NAME "tunnel"
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#define DEFAULT_TLENGTH (10240*8)
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#define DEFAULT_MAXLENGTH ((DEFAULT_TLENGTH*3)/2)
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#define DEFAULT_PREBUF DEFAULT_TLENGTH
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#define DEFAULT_MINREQ 512
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#define DEFAULT_FRAGSIZE 1024
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#define DEFAULT_TIMEOUT 5
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static const char* const valid_modargs[] = {
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"server",
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"sink",
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"cookie",
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"format",
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"channels",
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"rate",
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"sink_name",
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NULL,
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};
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static void command_stream_killed(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata);
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static void command_request(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata);
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static const struct pa_pdispatch_command command_table[PA_COMMAND_MAX] = {
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[PA_COMMAND_REQUEST] = { command_request },
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[PA_COMMAND_PLAYBACK_STREAM_KILLED] = { command_stream_killed },
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[PA_COMMAND_RECORD_STREAM_KILLED] = { command_stream_killed },
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};
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struct userdata {
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struct pa_socket_client *client;
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struct pa_pstream *pstream;
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struct pa_pdispatch *pdispatch;
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char *server_name, *sink_name;
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struct pa_sink *sink;
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struct pa_module *module;
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struct pa_core *core;
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uint8_t auth_cookie[PA_NATIVE_COOKIE_LENGTH];
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uint32_t ctag;
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uint32_t device_index;
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uint32_t requested_bytes;
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uint32_t channel;
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};
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static void close_stuff(struct userdata *u) {
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if (u->pstream) {
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pa_pstream_close(u->pstream);
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pa_pstream_unref(u->pstream);
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u->pstream = NULL;
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}
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if (u->pdispatch) {
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pa_pdispatch_unref(u->pdispatch);
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u->pdispatch = NULL;
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}
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if (u->client) {
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pa_socket_client_unref(u->client);
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u->client = NULL;
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}
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if (u->sink) {
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pa_sink_disconnect(u->sink);
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pa_sink_unref(u->sink);
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u->sink = NULL;
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}
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}
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static void die(struct userdata *u) {
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assert(u);
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close_stuff(u);
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pa_module_unload_request(u->module);
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}
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static void request_bytes(struct userdata *u) {
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assert(u);
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if (!u->pstream)
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return;
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while (u->requested_bytes > 0) {
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struct pa_memchunk chunk;
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if (pa_sink_render(u->sink, u->requested_bytes, &chunk) < 0)
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return;
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pa_pstream_send_memblock(u->pstream, u->channel, 0, &chunk);
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pa_memblock_unref(chunk.memblock);
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if (chunk.length > u->requested_bytes)
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u->requested_bytes = 0;
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else
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u->requested_bytes -= chunk.length;
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}
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}
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static void command_stream_killed(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
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struct userdata *u = userdata;
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assert(pd && t && u && u->pdispatch == pd);
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pa_log(__FILE__": stream killed\n");
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die(u);
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}
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static void command_request(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
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struct userdata *u = userdata;
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uint32_t bytes, channel;
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assert(pd && command == PA_COMMAND_REQUEST && t && u && u->pdispatch == pd);
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if (pa_tagstruct_getu32(t, &channel) < 0 ||
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pa_tagstruct_getu32(t, &bytes) < 0 ||
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!pa_tagstruct_eof(t)) {
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pa_log(__FILE__": invalid protocol reply\n");
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die(u);
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return;
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}
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if (channel != u->channel) {
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pa_log(__FILE__": recieved data for invalid channel\n");
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die(u);
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return;
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}
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u->requested_bytes += bytes;
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request_bytes(u);
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}
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static void create_stream_callback(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
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struct userdata *u = userdata;
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assert(pd && u && u->pdispatch == pd);
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if (command != PA_COMMAND_REPLY) {
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if (command == PA_COMMAND_ERROR)
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pa_log(__FILE__": failed to create stream.\n");
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else
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pa_log(__FILE__": protocol error.\n");
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die(u);
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return;
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}
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if (pa_tagstruct_getu32(t, &u->channel) < 0 ||
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pa_tagstruct_getu32(t, &u->device_index) < 0 ||
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pa_tagstruct_getu32(t, &u->requested_bytes) < 0 ||
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!pa_tagstruct_eof(t)) {
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pa_log(__FILE__": invalid reply.\n");
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die(u);
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return;
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}
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request_bytes(u);
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}
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static void setup_complete_callback(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) {
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struct userdata *u = userdata;
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struct pa_tagstruct *reply;
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char name[256], un[128], hn[128];
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assert(pd && u && u->pdispatch == pd);
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if (command != PA_COMMAND_REPLY || !pa_tagstruct_eof(t)) {
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if (command == PA_COMMAND_ERROR)
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pa_log(__FILE__": failed to authenticate\n");
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else
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pa_log(__FILE__": protocol error.\n");
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die(u);
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return;
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}
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snprintf(name, sizeof(name), "Tunnel from host '%s', user '%s', sink '%s'",
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pa_get_host_name(hn, sizeof(hn)),
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pa_get_user_name(un, sizeof(un)),
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u->sink->name);
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reply = pa_tagstruct_new(NULL, 0);
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pa_tagstruct_putu32(reply, PA_COMMAND_SET_CLIENT_NAME);
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pa_tagstruct_putu32(reply, tag = u->ctag++);
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pa_tagstruct_puts(reply, name);
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pa_pstream_send_tagstruct(u->pstream, reply);
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/* We ignore the server's reply here */
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reply = pa_tagstruct_new(NULL, 0);
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pa_tagstruct_putu32(reply, PA_COMMAND_CREATE_PLAYBACK_STREAM);
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pa_tagstruct_putu32(reply, tag = u->ctag++);
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pa_tagstruct_puts(reply, name);
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pa_tagstruct_put_sample_spec(reply, &u->sink->sample_spec);
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pa_tagstruct_putu32(reply, PA_INVALID_INDEX);
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pa_tagstruct_puts(reply, u->sink_name);
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pa_tagstruct_putu32(reply, DEFAULT_MAXLENGTH);
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pa_tagstruct_put_boolean(reply, 0);
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pa_tagstruct_putu32(reply, DEFAULT_TLENGTH);
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pa_tagstruct_putu32(reply, DEFAULT_PREBUF);
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pa_tagstruct_putu32(reply, DEFAULT_MINREQ);
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pa_tagstruct_putu32(reply, PA_VOLUME_NORM);
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pa_pstream_send_tagstruct(u->pstream, reply);
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pa_pdispatch_register_reply(u->pdispatch, tag, DEFAULT_TIMEOUT, create_stream_callback, u);
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}
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static void pstream_die_callback(struct pa_pstream *p, void *userdata) {
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struct userdata *u = userdata;
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assert(p && u);
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pa_log(__FILE__": stream died.\n");
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die(u);
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}
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static void pstream_packet_callback(struct pa_pstream *p, struct pa_packet *packet, void *userdata) {
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struct userdata *u = userdata;
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assert(p && packet && u);
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if (pa_pdispatch_run(u->pdispatch, packet, u) < 0) {
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pa_log(__FILE__": invalid packet\n");
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die(u);
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}
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}
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static void on_connection(struct pa_socket_client *sc, struct pa_iochannel *io, void *userdata) {
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struct userdata *u = userdata;
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struct pa_tagstruct *t;
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uint32_t tag;
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assert(sc && io && u && u->client == sc);
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pa_socket_client_unref(u->client);
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u->client = NULL;
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if (!io) {
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pa_log(__FILE__": connection failed.\n");
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pa_module_unload_request(u->module);
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return;
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}
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u->pstream = pa_pstream_new(u->core->mainloop, io, u->core->memblock_stat);
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u->pdispatch = pa_pdispatch_new(u->core->mainloop, command_table, PA_COMMAND_MAX);
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pa_pstream_set_die_callback(u->pstream, pstream_die_callback, u);
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pa_pstream_set_recieve_packet_callback(u->pstream, pstream_packet_callback, u);
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t = pa_tagstruct_new(NULL, 0);
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pa_tagstruct_putu32(t, PA_COMMAND_AUTH);
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pa_tagstruct_putu32(t, tag = u->ctag++);
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pa_tagstruct_put_arbitrary(t, u->auth_cookie, sizeof(u->auth_cookie));
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pa_pstream_send_tagstruct(u->pstream, t);
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pa_pdispatch_register_reply(u->pdispatch, tag, DEFAULT_TIMEOUT, setup_complete_callback, u);
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}
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static void sink_notify(struct pa_sink*sink) {
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struct userdata *u;
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assert(sink && sink->userdata);
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u = sink->userdata;
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request_bytes(u);
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}
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static pa_usec_t sink_get_latency(struct pa_sink *sink) {
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struct userdata *u;
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assert(sink && sink->userdata);
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u = sink->userdata;
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return 0;
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}
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int pa__init(struct pa_core *c, struct pa_module*m) {
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struct pa_modargs *ma = NULL;
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struct userdata *u = NULL;
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struct pa_sample_spec ss;
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assert(c && m);
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if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
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pa_log(__FILE__": failed to parse module arguments\n");
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}
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u = pa_xmalloc(sizeof(struct userdata));
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m->userdata = u;
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u->module = m;
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u->core = c;
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u->client = NULL;
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u->pdispatch = NULL;
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u->pstream = NULL;
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u->server_name = u->sink_name = NULL;
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u->sink = NULL;
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u->ctag = 1;
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u->device_index = u->channel = PA_INVALID_INDEX;
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u->requested_bytes = 0;
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if (pa_authkey_load_from_home(pa_modargs_get_value(ma, "cookie", PA_NATIVE_COOKIE_FILE), u->auth_cookie, sizeof(u->auth_cookie)) < 0) {
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pa_log(__FILE__": failed to load cookie.\n");
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goto fail;
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}
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if (!(u->server_name = pa_xstrdup(pa_modargs_get_value(ma, "server", NULL)))) {
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pa_log(__FILE__": no server specified.\n");
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goto fail;
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}
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u->sink_name = pa_xstrdup(pa_modargs_get_value(ma, "sink", NULL));
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ss = c->default_sample_spec;
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if (pa_modargs_get_sample_spec(ma, &ss) < 0) {
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pa_log(__FILE__": invalid sample format specification\n");
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goto fail;
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}
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if (u->server_name[0] == '/')
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u->client = pa_socket_client_new_unix(c->mainloop, u->server_name);
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else {
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size_t len;
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struct sockaddr *sa;
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if (!(sa = pa_resolve_server(u->server_name, &len, PA_NATIVE_DEFAULT_PORT))) {
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pa_log(__FILE__": failed to resolve server '%s'\n", u->server_name);
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goto fail;
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}
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u->client = pa_socket_client_new_sockaddr(c->mainloop, sa, len);
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pa_xfree(sa);
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}
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if (!u->client)
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goto fail;
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pa_socket_client_set_callback(u->client, on_connection, u);
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if (!(u->sink = pa_sink_new(c, pa_modargs_get_value(ma, "sink_name", DEFAULT_SINK_NAME), 0, &ss))) {
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pa_log(__FILE__": failed to create sink.\n");
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goto fail;
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}
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u->sink->notify = sink_notify;
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u->sink->get_latency = sink_get_latency;
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u->sink->userdata = u;
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u->sink->description = pa_sprintf_malloc("Tunnel to '%s%s%s'", u->sink_name ? u->sink_name : "", u->sink_name ? "@" : "", u->server_name);
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pa_sink_set_owner(u->sink, m);
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pa_modargs_free(ma);
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return 0;
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fail:
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pa__done(c, m);
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if (ma)
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pa_modargs_free(ma);
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return -1;
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}
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void pa__done(struct pa_core *c, struct pa_module*m) {
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struct userdata* u;
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assert(c && m);
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if (!(u = m->userdata))
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return;
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close_stuff(u);
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pa_xfree(u->sink_name);
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pa_xfree(u->server_name);
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pa_xfree(u);
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}
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