From 6f59ae1763ee48f27448a7de9d635f61886052e1 Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Tue, 28 Sep 2004 22:47:48 +0000 Subject: 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 --- polyp/module-tunnel.c | 423 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 423 insertions(+) create mode 100644 polyp/module-tunnel.c (limited to 'polyp/module-tunnel.c') diff --git a/polyp/module-tunnel.c b/polyp/module-tunnel.c new file mode 100644 index 00000000..0c78b138 --- /dev/null +++ b/polyp/module-tunnel.c @@ -0,0 +1,423 @@ +/* $Id$ */ + +/*** + This file is part of polypaudio. + + polypaudio 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. + + polypaudio 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 polypaudio; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 + USA. +***/ + +#ifdef HAVE_CONFIG_H +#include +#endif + +#include +#include +#include +#include +#include +#include +#include +#include + +#include "module.h" +#include "util.h" +#include "modargs.h" +#include "log.h" +#include "subscribe.h" +#include "xmalloc.h" +#include "sink-input.h" +#include "pdispatch.h" +#include "pstream.h" +#include "pstream-util.h" +#include "authkey.h" +#include "socket-client.h" +#include "socket-util.h" + +PA_MODULE_AUTHOR("Lennart Poettering") +PA_MODULE_DESCRIPTION("Tunnel module") +PA_MODULE_USAGE("server= sink= cookie= format= channels= rate= sink_name=") +PA_MODULE_VERSION(PACKAGE_VERSION) + +#define DEFAULT_SINK_NAME "tunnel" + +#define DEFAULT_TLENGTH (10240*8) +#define DEFAULT_MAXLENGTH ((DEFAULT_TLENGTH*3)/2) +#define DEFAULT_PREBUF DEFAULT_TLENGTH +#define DEFAULT_MINREQ 512 +#define DEFAULT_FRAGSIZE 1024 + +#define DEFAULT_TIMEOUT 5 + +static const char* const valid_modargs[] = { + "server", + "sink", + "cookie", + "format", + "channels", + "rate", + "sink_name", + NULL, +}; + +static void command_stream_killed(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata); +static void command_request(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata); + +static const struct pa_pdispatch_command command_table[PA_COMMAND_MAX] = { + [PA_COMMAND_REQUEST] = { command_request }, + [PA_COMMAND_PLAYBACK_STREAM_KILLED] = { command_stream_killed }, + [PA_COMMAND_RECORD_STREAM_KILLED] = { command_stream_killed }, +}; + +struct userdata { + struct pa_socket_client *client; + struct pa_pstream *pstream; + struct pa_pdispatch *pdispatch; + + char *server_name, *sink_name; + + struct pa_sink *sink; + struct pa_module *module; + struct pa_core *core; + + uint8_t auth_cookie[PA_NATIVE_COOKIE_LENGTH]; + + uint32_t ctag; + uint32_t device_index; + uint32_t requested_bytes; + uint32_t channel; +}; + + +static void close_stuff(struct userdata *u) { + if (u->pstream) { + pa_pstream_close(u->pstream); + pa_pstream_unref(u->pstream); + u->pstream = NULL; + } + + if (u->pdispatch) { + pa_pdispatch_unref(u->pdispatch); + u->pdispatch = NULL; + } + + if (u->client) { + pa_socket_client_unref(u->client); + u->client = NULL; + } + + if (u->sink) { + pa_sink_disconnect(u->sink); + pa_sink_unref(u->sink); + u->sink = NULL; + } +} + +static void die(struct userdata *u) { + assert(u); + close_stuff(u); + pa_module_unload_request(u->module); +} + +static void request_bytes(struct userdata *u) { + assert(u); + + if (!u->pstream) + return; + + while (u->requested_bytes > 0) { + struct pa_memchunk chunk; + if (pa_sink_render(u->sink, u->requested_bytes, &chunk) < 0) + return; + + pa_pstream_send_memblock(u->pstream, u->channel, 0, &chunk); + pa_memblock_unref(chunk.memblock); + + if (chunk.length > u->requested_bytes) + u->requested_bytes = 0; + else + u->requested_bytes -= chunk.length; + } +} + +static void command_stream_killed(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) { + struct userdata *u = userdata; + assert(pd && t && u && u->pdispatch == pd); + + pa_log(__FILE__": stream killed\n"); + die(u); +} + +static void command_request(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) { + struct userdata *u = userdata; + uint32_t bytes, channel; + assert(pd && command == PA_COMMAND_REQUEST && t && u && u->pdispatch == pd); + + if (pa_tagstruct_getu32(t, &channel) < 0 || + pa_tagstruct_getu32(t, &bytes) < 0 || + !pa_tagstruct_eof(t)) { + pa_log(__FILE__": invalid protocol reply\n"); + die(u); + return; + } + + if (channel != u->channel) { + pa_log(__FILE__": recieved data for invalid channel\n"); + die(u); + return; + } + + u->requested_bytes += bytes; + request_bytes(u); +} + + +static void create_stream_callback(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) { + struct userdata *u = userdata; + assert(pd && u && u->pdispatch == pd); + + if (command != PA_COMMAND_REPLY) { + if (command == PA_COMMAND_ERROR) + pa_log(__FILE__": failed to create stream.\n"); + else + pa_log(__FILE__": protocol error.\n"); + die(u); + return; + } + + if (pa_tagstruct_getu32(t, &u->channel) < 0 || + pa_tagstruct_getu32(t, &u->device_index) < 0 || + pa_tagstruct_getu32(t, &u->requested_bytes) < 0 || + !pa_tagstruct_eof(t)) { + pa_log(__FILE__": invalid reply.\n"); + die(u); + return; + } + + request_bytes(u); +} + +static void setup_complete_callback(struct pa_pdispatch *pd, uint32_t command, uint32_t tag, struct pa_tagstruct *t, void *userdata) { + struct userdata *u = userdata; + struct pa_tagstruct *reply; + char name[256], un[128], hn[128]; + assert(pd && u && u->pdispatch == pd); + + if (command != PA_COMMAND_REPLY || !pa_tagstruct_eof(t)) { + if (command == PA_COMMAND_ERROR) + pa_log(__FILE__": failed to authenticate\n"); + else + pa_log(__FILE__": protocol error.\n"); + die(u); + return; + } + + snprintf(name, sizeof(name), "Tunnel from host '%s', user '%s', sink '%s'", + pa_get_host_name(hn, sizeof(hn)), + pa_get_user_name(un, sizeof(un)), + u->sink->name); + + reply = pa_tagstruct_new(NULL, 0); + pa_tagstruct_putu32(reply, PA_COMMAND_SET_CLIENT_NAME); + pa_tagstruct_putu32(reply, tag = u->ctag++); + pa_tagstruct_puts(reply, name); + pa_pstream_send_tagstruct(u->pstream, reply); + /* We ignore the server's reply here */ + + reply = pa_tagstruct_new(NULL, 0); + pa_tagstruct_putu32(reply, PA_COMMAND_CREATE_PLAYBACK_STREAM); + pa_tagstruct_putu32(reply, tag = u->ctag++); + pa_tagstruct_puts(reply, name); + pa_tagstruct_put_sample_spec(reply, &u->sink->sample_spec); + pa_tagstruct_putu32(reply, PA_INVALID_INDEX); + pa_tagstruct_puts(reply, u->sink_name); + pa_tagstruct_putu32(reply, DEFAULT_MAXLENGTH); + pa_tagstruct_put_boolean(reply, 0); + pa_tagstruct_putu32(reply, DEFAULT_TLENGTH); + pa_tagstruct_putu32(reply, DEFAULT_PREBUF); + pa_tagstruct_putu32(reply, DEFAULT_MINREQ); + pa_tagstruct_putu32(reply, PA_VOLUME_NORM); + + pa_pstream_send_tagstruct(u->pstream, reply); + pa_pdispatch_register_reply(u->pdispatch, tag, DEFAULT_TIMEOUT, create_stream_callback, u); +} + +static void pstream_die_callback(struct pa_pstream *p, void *userdata) { + struct userdata *u = userdata; + assert(p && u); + + pa_log(__FILE__": stream died.\n"); + die(u); +} + + +static void pstream_packet_callback(struct pa_pstream *p, struct pa_packet *packet, void *userdata) { + struct userdata *u = userdata; + assert(p && packet && u); + + if (pa_pdispatch_run(u->pdispatch, packet, u) < 0) { + pa_log(__FILE__": invalid packet\n"); + die(u); + } +} + +static void on_connection(struct pa_socket_client *sc, struct pa_iochannel *io, void *userdata) { + struct userdata *u = userdata; + struct pa_tagstruct *t; + uint32_t tag; + assert(sc && io && u && u->client == sc); + + pa_socket_client_unref(u->client); + u->client = NULL; + + if (!io) { + pa_log(__FILE__": connection failed.\n"); + pa_module_unload_request(u->module); + return; + } + + u->pstream = pa_pstream_new(u->core->mainloop, io, u->core->memblock_stat); + u->pdispatch = pa_pdispatch_new(u->core->mainloop, command_table, PA_COMMAND_MAX); + + pa_pstream_set_die_callback(u->pstream, pstream_die_callback, u); + pa_pstream_set_recieve_packet_callback(u->pstream, pstream_packet_callback, u); + + t = pa_tagstruct_new(NULL, 0); + pa_tagstruct_putu32(t, PA_COMMAND_AUTH); + pa_tagstruct_putu32(t, tag = u->ctag++); + pa_tagstruct_put_arbitrary(t, u->auth_cookie, sizeof(u->auth_cookie)); + pa_pstream_send_tagstruct(u->pstream, t); + pa_pdispatch_register_reply(u->pdispatch, tag, DEFAULT_TIMEOUT, setup_complete_callback, u); + +} + +static void sink_notify(struct pa_sink*sink) { + struct userdata *u; + assert(sink && sink->userdata); + u = sink->userdata; + + request_bytes(u); +} + +static pa_usec_t sink_get_latency(struct pa_sink *sink) { + struct userdata *u; + assert(sink && sink->userdata); + u = sink->userdata; + + return 0; +} + +int pa__init(struct pa_core *c, struct pa_module*m) { + struct pa_modargs *ma = NULL; + struct userdata *u = NULL; + struct pa_sample_spec ss; + assert(c && m); + + if (!(ma = pa_modargs_new(m->argument, valid_modargs))) { + pa_log(__FILE__": failed to parse module arguments\n"); + + } + + u = pa_xmalloc(sizeof(struct userdata)); + m->userdata = u; + u->module = m; + u->core = c; + u->client = NULL; + u->pdispatch = NULL; + u->pstream = NULL; + u->server_name = u->sink_name = NULL; + u->sink = NULL; + u->ctag = 1; + u->device_index = u->channel = PA_INVALID_INDEX; + u->requested_bytes = 0; + + if (pa_authkey_load_from_home(pa_modargs_get_value(ma, "cookie", PA_NATIVE_COOKIE_FILE), u->auth_cookie, sizeof(u->auth_cookie)) < 0) { + pa_log(__FILE__": failed to load cookie.\n"); + goto fail; + } + + if (!(u->server_name = pa_xstrdup(pa_modargs_get_value(ma, "server", NULL)))) { + pa_log(__FILE__": no server specified.\n"); + goto fail; + } + + u->sink_name = pa_xstrdup(pa_modargs_get_value(ma, "sink", NULL)); + + ss = c->default_sample_spec; + if (pa_modargs_get_sample_spec(ma, &ss) < 0) { + pa_log(__FILE__": invalid sample format specification\n"); + goto fail; + } + + if (u->server_name[0] == '/') + u->client = pa_socket_client_new_unix(c->mainloop, u->server_name); + else { + size_t len; + struct sockaddr *sa; + + if (!(sa = pa_resolve_server(u->server_name, &len, PA_NATIVE_DEFAULT_PORT))) { + pa_log(__FILE__": failed to resolve server '%s'\n", u->server_name); + goto fail; + } + + u->client = pa_socket_client_new_sockaddr(c->mainloop, sa, len); + pa_xfree(sa); + } + + if (!u->client) + goto fail; + + pa_socket_client_set_callback(u->client, on_connection, u); + + if (!(u->sink = pa_sink_new(c, pa_modargs_get_value(ma, "sink_name", DEFAULT_SINK_NAME), 0, &ss))) { + pa_log(__FILE__": failed to create sink.\n"); + goto fail; + } + + u->sink->notify = sink_notify; + u->sink->get_latency = sink_get_latency; + u->sink->userdata = u; + u->sink->description = pa_sprintf_malloc("Tunnel to '%s%s%s'", u->sink_name ? u->sink_name : "", u->sink_name ? "@" : "", u->server_name); + + pa_sink_set_owner(u->sink, m); + + pa_modargs_free(ma); + + return 0; + +fail: + pa__done(c, m); + + if (ma) + pa_modargs_free(ma); + return -1; +} + +void pa__done(struct pa_core *c, struct pa_module*m) { + struct userdata* u; + assert(c && m); + + if (!(u = m->userdata)) + return; + + close_stuff(u); + + pa_xfree(u->sink_name); + pa_xfree(u->server_name); + + pa_xfree(u); +} + + -- cgit