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pulseaudio/src/modules/module-zeroconf-publish.c
Arun Raghavan 6825df8cec hashmap: Add the ability to free keys 
Since the hashmap stores a pointer to the key provided at pa_hashmap_put()
time, it make sense to allow the hashmap to be given ownership of the key and
have it free it at pa_hashmap_remove/free time.

To do this cleanly, we now provide the key and value free functions at hashmap
creation time with a pa_hashmap_new_full. With this, we do away with the free
function that was provided at remove/free time for freeing the value.
2013-09-17 18:01:22 +05:30

838 lines
25 KiB
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/***
This file is part of PulseAudio.
Copyright 2004-2006 Lennart Poettering
PulseAudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
PulseAudio 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 Lesser General Public
License along with PulseAudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <avahi-client/client.h>
#include <avahi-client/publish.h>
#include <avahi-common/alternative.h>
#include <avahi-common/error.h>
#include <avahi-common/domain.h>
#include <pulse/xmalloc.h>
#include <pulse/util.h>
#include <pulse/thread-mainloop.h>
#include <pulsecore/parseaddr.h>
#include <pulsecore/sink.h>
#include <pulsecore/source.h>
#include <pulsecore/native-common.h>
#include <pulsecore/core-util.h>
#include <pulsecore/log.h>
#include <pulsecore/dynarray.h>
#include <pulsecore/modargs.h>
#include <pulsecore/avahi-wrap.h>
#include <pulsecore/protocol-native.h>
#include "module-zeroconf-publish-symdef.h"
PA_MODULE_AUTHOR("Lennart Poettering");
PA_MODULE_DESCRIPTION("mDNS/DNS-SD Service Publisher");
PA_MODULE_VERSION(PACKAGE_VERSION);
PA_MODULE_LOAD_ONCE(true);
#define SERVICE_TYPE_SINK "_pulse-sink._tcp"
#define SERVICE_TYPE_SOURCE "_pulse-source._tcp"
#define SERVICE_TYPE_SERVER "_pulse-server._tcp"
#define SERVICE_SUBTYPE_SINK_HARDWARE "_hardware._sub."SERVICE_TYPE_SINK
#define SERVICE_SUBTYPE_SINK_VIRTUAL "_virtual._sub."SERVICE_TYPE_SINK
#define SERVICE_SUBTYPE_SOURCE_HARDWARE "_hardware._sub."SERVICE_TYPE_SOURCE
#define SERVICE_SUBTYPE_SOURCE_VIRTUAL "_virtual._sub."SERVICE_TYPE_SOURCE
#define SERVICE_SUBTYPE_SOURCE_MONITOR "_monitor._sub."SERVICE_TYPE_SOURCE
#define SERVICE_SUBTYPE_SOURCE_NON_MONITOR "_non-monitor._sub."SERVICE_TYPE_SOURCE
/*
* Note: Because the core avahi-client calls result in synchronous D-Bus
* communication, calling any of those functions in the PA mainloop context
* could lead to the mainloop being blocked for long periods.
*
* To avoid this, we create a threaded-mainloop for Avahi calls, and push all
* D-Bus communication into that thread. The thumb-rule for the split is:
*
* 1. If access to PA data structures is needed, use the PA mainloop context
*
* 2. If a (blocking) avahi-client call is needed, use the Avahi mainloop
*
* We do have message queue to pass messages from the Avahi mainloop to the PA
* mainloop.
*/
static const char* const valid_modargs[] = {
NULL
};
struct avahi_msg {
pa_msgobject parent;
};
typedef struct avahi_msg avahi_msg;
PA_DEFINE_PRIVATE_CLASS(avahi_msg, pa_msgobject);
enum {
AVAHI_MESSAGE_PUBLISH_ALL,
AVAHI_MESSAGE_SHUTDOWN_START,
AVAHI_MESSAGE_SHUTDOWN_COMPLETE,
};
enum service_subtype {
SUBTYPE_HARDWARE,
SUBTYPE_VIRTUAL,
SUBTYPE_MONITOR
};
struct service {
void *key;
struct userdata *userdata;
AvahiEntryGroup *entry_group;
char *service_name;
const char *service_type;
enum service_subtype subtype;
char *name;
bool is_sink;
pa_sample_spec ss;
pa_channel_map cm;
pa_proplist *proplist;
};
struct userdata {
pa_thread_mq thread_mq;
pa_rtpoll *rtpoll;
avahi_msg *msg;
pa_core *core;
pa_module *module;
pa_mainloop_api *api;
pa_threaded_mainloop *mainloop;
AvahiPoll *avahi_poll;
AvahiClient *client;
pa_hashmap *services; /* protect with mainloop lock */
char *service_name;
AvahiEntryGroup *main_entry_group;
pa_hook_slot *sink_new_slot, *source_new_slot, *sink_unlink_slot, *source_unlink_slot, *sink_changed_slot, *source_changed_slot;
pa_native_protocol *native;
};
/* Runs in PA mainloop context */
static void get_service_data(struct service *s, pa_object *device) {
pa_assert(s);
if (pa_sink_isinstance(device)) {
pa_sink *sink = PA_SINK(device);
s->is_sink = true;
s->service_type = SERVICE_TYPE_SINK;
s->ss = sink->sample_spec;
s->cm = sink->channel_map;
s->name = pa_xstrdup(sink->name);
s->proplist = pa_proplist_copy(sink->proplist);
s->subtype = sink->flags & PA_SINK_HARDWARE ? SUBTYPE_HARDWARE : SUBTYPE_VIRTUAL;
} else if (pa_source_isinstance(device)) {
pa_source *source = PA_SOURCE(device);
s->is_sink = false;
s->service_type = SERVICE_TYPE_SOURCE;
s->ss = source->sample_spec;
s->cm = source->channel_map;
s->name = pa_xstrdup(source->name);
s->proplist = pa_proplist_copy(source->proplist);
s->subtype = source->monitor_of ? SUBTYPE_MONITOR : (source->flags & PA_SOURCE_HARDWARE ? SUBTYPE_HARDWARE : SUBTYPE_VIRTUAL);
} else
pa_assert_not_reached();
}
/* Can be used in either PA or Avahi mainloop context since the bits of u->core
* that we access don't change after startup. */
static AvahiStringList* txt_record_server_data(pa_core *c, AvahiStringList *l) {
char s[128];
char *t;
pa_assert(c);
l = avahi_string_list_add_pair(l, "server-version", PACKAGE_NAME" "PACKAGE_VERSION);
t = pa_get_user_name_malloc();
l = avahi_string_list_add_pair(l, "user-name", t);
pa_xfree(t);
t = pa_machine_id();
l = avahi_string_list_add_pair(l, "machine-id", t);
pa_xfree(t);
t = pa_uname_string();
l = avahi_string_list_add_pair(l, "uname", t);
pa_xfree(t);
l = avahi_string_list_add_pair(l, "fqdn", pa_get_fqdn(s, sizeof(s)));
l = avahi_string_list_add_printf(l, "cookie=0x%08x", c->cookie);
return l;
}
static void publish_service(pa_mainloop_api *api, void *service);
/* Runs in Avahi mainloop context */
static void service_entry_group_callback(AvahiEntryGroup *g, AvahiEntryGroupState state, void *userdata) {
struct service *s = userdata;
pa_assert(s);
switch (state) {
case AVAHI_ENTRY_GROUP_ESTABLISHED:
pa_log_info("Successfully established service %s.", s->service_name);
break;
case AVAHI_ENTRY_GROUP_COLLISION: {
char *t;
t = avahi_alternative_service_name(s->service_name);
pa_log_info("Name collision, renaming %s to %s.", s->service_name, t);
pa_xfree(s->service_name);
s->service_name = t;
publish_service(NULL, s);
break;
}
case AVAHI_ENTRY_GROUP_FAILURE: {
pa_log("Failed to register service: %s", avahi_strerror(avahi_client_errno(avahi_entry_group_get_client(g))));
avahi_entry_group_free(g);
s->entry_group = NULL;
break;
}
case AVAHI_ENTRY_GROUP_UNCOMMITED:
case AVAHI_ENTRY_GROUP_REGISTERING:
;
}
}
static void service_free(struct service *s);
/* Can run in either context */
static uint16_t compute_port(struct userdata *u) {
pa_strlist *i;
pa_assert(u);
for (i = pa_native_protocol_servers(u->native); i; i = pa_strlist_next(i)) {
pa_parsed_address a;
if (pa_parse_address(pa_strlist_data(i), &a) >= 0 &&
(a.type == PA_PARSED_ADDRESS_TCP4 ||
a.type == PA_PARSED_ADDRESS_TCP6 ||
a.type == PA_PARSED_ADDRESS_TCP_AUTO) &&
a.port > 0) {
pa_xfree(a.path_or_host);
return a.port;
}
pa_xfree(a.path_or_host);
}
return PA_NATIVE_DEFAULT_PORT;
}
/* Runs in Avahi mainloop context */
static void publish_service(pa_mainloop_api *api PA_GCC_UNUSED, void *service) {
struct service *s = (struct service *) service;
int r = -1;
AvahiStringList *txt = NULL;
char cm[PA_CHANNEL_MAP_SNPRINT_MAX];
const char *t;
const char * const subtype_text[] = {
[SUBTYPE_HARDWARE] = "hardware",
[SUBTYPE_VIRTUAL] = "virtual",
[SUBTYPE_MONITOR] = "monitor"
};
pa_assert(s);
if (!s->userdata->client || avahi_client_get_state(s->userdata->client) != AVAHI_CLIENT_S_RUNNING)
return;
if (!s->entry_group) {
if (!(s->entry_group = avahi_entry_group_new(s->userdata->client, service_entry_group_callback, s))) {
pa_log("avahi_entry_group_new(): %s", avahi_strerror(avahi_client_errno(s->userdata->client)));
goto finish;
}
} else
avahi_entry_group_reset(s->entry_group);
txt = txt_record_server_data(s->userdata->core, txt);
txt = avahi_string_list_add_pair(txt, "device", s->name);
txt = avahi_string_list_add_printf(txt, "rate=%u", s->ss.rate);
txt = avahi_string_list_add_printf(txt, "channels=%u", s->ss.channels);
txt = avahi_string_list_add_pair(txt, "format", pa_sample_format_to_string(s->ss.format));
txt = avahi_string_list_add_pair(txt, "channel_map", pa_channel_map_snprint(cm, sizeof(cm), &s->cm));
txt = avahi_string_list_add_pair(txt, "subtype", subtype_text[s->subtype]);
if ((t = pa_proplist_gets(s->proplist, PA_PROP_DEVICE_DESCRIPTION)))
txt = avahi_string_list_add_pair(txt, "description", t);
if ((t = pa_proplist_gets(s->proplist, PA_PROP_DEVICE_ICON_NAME)))
txt = avahi_string_list_add_pair(txt, "icon-name", t);
if ((t = pa_proplist_gets(s->proplist, PA_PROP_DEVICE_VENDOR_NAME)))
txt = avahi_string_list_add_pair(txt, "vendor-name", t);
if ((t = pa_proplist_gets(s->proplist, PA_PROP_DEVICE_PRODUCT_NAME)))
txt = avahi_string_list_add_pair(txt, "product-name", t);
if ((t = pa_proplist_gets(s->proplist, PA_PROP_DEVICE_CLASS)))
txt = avahi_string_list_add_pair(txt, "class", t);
if ((t = pa_proplist_gets(s->proplist, PA_PROP_DEVICE_FORM_FACTOR)))
txt = avahi_string_list_add_pair(txt, "form-factor", t);
if (avahi_entry_group_add_service_strlst(
s->entry_group,
AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC,
0,
s->service_name,
s->service_type,
NULL,
NULL,
compute_port(s->userdata),
txt) < 0) {
pa_log("avahi_entry_group_add_service_strlst(): %s", avahi_strerror(avahi_client_errno(s->userdata->client)));
goto finish;
}
if (avahi_entry_group_add_service_subtype(
s->entry_group,
AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC,
0,
s->service_name,
s->service_type,
NULL,
s->is_sink ? (s->subtype == SUBTYPE_HARDWARE ? SERVICE_SUBTYPE_SINK_HARDWARE : SERVICE_SUBTYPE_SINK_VIRTUAL) :
(s->subtype == SUBTYPE_HARDWARE ? SERVICE_SUBTYPE_SOURCE_HARDWARE : (s->subtype == SUBTYPE_VIRTUAL ? SERVICE_SUBTYPE_SOURCE_VIRTUAL : SERVICE_SUBTYPE_SOURCE_MONITOR))) < 0) {
pa_log("avahi_entry_group_add_service_subtype(): %s", avahi_strerror(avahi_client_errno(s->userdata->client)));
goto finish;
}
if (!s->is_sink && s->subtype != SUBTYPE_MONITOR) {
if (avahi_entry_group_add_service_subtype(
s->entry_group,
AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC,
0,
s->service_name,
SERVICE_TYPE_SOURCE,
NULL,
SERVICE_SUBTYPE_SOURCE_NON_MONITOR) < 0) {
pa_log("avahi_entry_group_add_service_subtype(): %s", avahi_strerror(avahi_client_errno(s->userdata->client)));
goto finish;
}
}
if (avahi_entry_group_commit(s->entry_group) < 0) {
pa_log("avahi_entry_group_commit(): %s", avahi_strerror(avahi_client_errno(s->userdata->client)));
goto finish;
}
r = 0;
pa_log_debug("Successfully created entry group for %s.", s->service_name);
finish:
/* Remove this service */
if (r < 0) {
pa_hashmap_remove(s->userdata->services, s->key);
service_free(s);
}
avahi_string_list_free(txt);
}
/* Runs in PA mainloop context */
static struct service *get_service(struct userdata *u, pa_object *device) {
struct service *s;
char *hn, *un;
const char *n;
pa_assert(u);
pa_object_assert_ref(device);
pa_threaded_mainloop_lock(u->mainloop);
if ((s = pa_hashmap_get(u->services, device)))
goto out;
s = pa_xnew(struct service, 1);
s->key = device;
s->userdata = u;
s->entry_group = NULL;
get_service_data(s, device);
if (!(n = pa_proplist_gets(s->proplist, PA_PROP_DEVICE_DESCRIPTION)))
n = s->name;
hn = pa_get_host_name_malloc();
un = pa_get_user_name_malloc();
s->service_name = pa_truncate_utf8(pa_sprintf_malloc("%s@%s: %s", un, hn, n), AVAHI_LABEL_MAX-1);
pa_xfree(un);
pa_xfree(hn);
pa_hashmap_put(u->services, device, s);
out:
pa_threaded_mainloop_unlock(u->mainloop);
return s;
}
/* Run from Avahi mainloop context */
static void service_free(struct service *s) {
pa_assert(s);
if (s->entry_group) {
pa_log_debug("Removing entry group for %s.", s->service_name);
avahi_entry_group_free(s->entry_group);
}
pa_xfree(s->service_name);
pa_xfree(s->name);
pa_proplist_free(s->proplist);
pa_xfree(s);
}
/* Runs in PA mainloop context */
static bool shall_ignore(pa_object *o) {
pa_object_assert_ref(o);
if (pa_sink_isinstance(o))
return !!(PA_SINK(o)->flags & PA_SINK_NETWORK);
if (pa_source_isinstance(o))
return PA_SOURCE(o)->monitor_of || (PA_SOURCE(o)->flags & PA_SOURCE_NETWORK);
pa_assert_not_reached();
}
/* Runs in PA mainloop context */
static pa_hook_result_t device_new_or_changed_cb(pa_core *c, pa_object *o, struct userdata *u) {
pa_assert(c);
pa_object_assert_ref(o);
if (!shall_ignore(o)) {
pa_threaded_mainloop_lock(u->mainloop);
pa_mainloop_api_once(u->api, publish_service, get_service(u, o));
pa_threaded_mainloop_unlock(u->mainloop);
}
return PA_HOOK_OK;
}
/* Runs in PA mainloop context */
static pa_hook_result_t device_unlink_cb(pa_core *c, pa_object *o, struct userdata *u) {
struct service *s;
pa_assert(c);
pa_object_assert_ref(o);
pa_threaded_mainloop_lock(u->mainloop);
if ((s = pa_hashmap_remove(u->services, o)))
service_free(s);
pa_threaded_mainloop_unlock(u->mainloop);
return PA_HOOK_OK;
}
static int publish_main_service(struct userdata *u);
/* Runs in Avahi mainloop context */
static void main_entry_group_callback(AvahiEntryGroup *g, AvahiEntryGroupState state, void *userdata) {
struct userdata *u = userdata;
pa_assert(u);
switch (state) {
case AVAHI_ENTRY_GROUP_ESTABLISHED:
pa_log_info("Successfully established main service.");
break;
case AVAHI_ENTRY_GROUP_COLLISION: {
char *t;
t = avahi_alternative_service_name(u->service_name);
pa_log_info("Name collision: renaming main service %s to %s.", u->service_name, t);
pa_xfree(u->service_name);
u->service_name = t;
publish_main_service(u);
break;
}
case AVAHI_ENTRY_GROUP_FAILURE: {
pa_log("Failed to register main service: %s", avahi_strerror(avahi_client_errno(avahi_entry_group_get_client(g))));
avahi_entry_group_free(g);
u->main_entry_group = NULL;
break;
}
case AVAHI_ENTRY_GROUP_UNCOMMITED:
case AVAHI_ENTRY_GROUP_REGISTERING:
break;
}
}
/* Runs in Avahi mainloop context */
static int publish_main_service(struct userdata *u) {
AvahiStringList *txt = NULL;
int r = -1;
pa_assert(u);
if (!u->main_entry_group) {
if (!(u->main_entry_group = avahi_entry_group_new(u->client, main_entry_group_callback, u))) {
pa_log("avahi_entry_group_new() failed: %s", avahi_strerror(avahi_client_errno(u->client)));
goto fail;
}
} else
avahi_entry_group_reset(u->main_entry_group);
txt = txt_record_server_data(u->core, txt);
if (avahi_entry_group_add_service_strlst(
u->main_entry_group,
AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC,
0,
u->service_name,
SERVICE_TYPE_SERVER,
NULL,
NULL,
compute_port(u),
txt) < 0) {
pa_log("avahi_entry_group_add_service_strlst() failed: %s", avahi_strerror(avahi_client_errno(u->client)));
goto fail;
}
if (avahi_entry_group_commit(u->main_entry_group) < 0) {
pa_log("avahi_entry_group_commit() failed: %s", avahi_strerror(avahi_client_errno(u->client)));
goto fail;
}
r = 0;
fail:
avahi_string_list_free(txt);
return r;
}
/* Runs in PA mainloop context */
static int publish_all_services(struct userdata *u) {
pa_sink *sink;
pa_source *source;
int r = -1;
uint32_t idx;
pa_assert(u);
pa_log_debug("Publishing services in Zeroconf");
for (sink = PA_SINK(pa_idxset_first(u->core->sinks, &idx)); sink; sink = PA_SINK(pa_idxset_next(u->core->sinks, &idx)))
if (!shall_ignore(PA_OBJECT(sink))) {
pa_threaded_mainloop_lock(u->mainloop);
pa_mainloop_api_once(u->api, publish_service, get_service(u, PA_OBJECT(sink)));
pa_threaded_mainloop_unlock(u->mainloop);
}
for (source = PA_SOURCE(pa_idxset_first(u->core->sources, &idx)); source; source = PA_SOURCE(pa_idxset_next(u->core->sources, &idx)))
if (!shall_ignore(PA_OBJECT(source))) {
pa_threaded_mainloop_lock(u->mainloop);
pa_mainloop_api_once(u->api, publish_service, get_service(u, PA_OBJECT(source)));
pa_threaded_mainloop_unlock(u->mainloop);
}
if (publish_main_service(u) < 0)
goto fail;
r = 0;
fail:
return r;
}
/* Runs in Avahi mainloop context */
static void unpublish_all_services(struct userdata *u, bool rem) {
void *state = NULL;
struct service *s;
pa_assert(u);
pa_log_debug("Unpublishing services in Zeroconf");
while ((s = pa_hashmap_iterate(u->services, &state, NULL))) {
if (s->entry_group) {
if (rem) {
pa_log_debug("Removing entry group for %s.", s->service_name);
avahi_entry_group_free(s->entry_group);
s->entry_group = NULL;
} else {
avahi_entry_group_reset(s->entry_group);
pa_log_debug("Resetting entry group for %s.", s->service_name);
}
}
}
if (u->main_entry_group) {
if (rem) {
pa_log_debug("Removing main entry group.");
avahi_entry_group_free(u->main_entry_group);
u->main_entry_group = NULL;
} else {
avahi_entry_group_reset(u->main_entry_group);
pa_log_debug("Resetting main entry group.");
}
}
}
/* Runs in PA mainloop context */
static int avahi_process_msg(pa_msgobject *o, int code, void *data, int64_t offset, pa_memchunk *chunk) {
struct userdata *u = (struct userdata *) data;
switch (code) {
case AVAHI_MESSAGE_PUBLISH_ALL:
publish_all_services(u);
break;
case AVAHI_MESSAGE_SHUTDOWN_START:
pa_module_unload(u->core, u->module, true);
break;
case AVAHI_MESSAGE_SHUTDOWN_COMPLETE:
/* pa__done() is waiting for this */
break;
default:
pa_assert_not_reached();
}
return 0;
}
/* Runs in Avahi mainloop context */
static void client_callback(AvahiClient *c, AvahiClientState state, void *userdata) {
struct userdata *u = userdata;
pa_assert(c);
pa_assert(u);
u->client = c;
switch (state) {
case AVAHI_CLIENT_S_RUNNING:
/* Collect all sinks/sources, and publish them */
pa_asyncmsgq_post(u->thread_mq.outq, PA_MSGOBJECT(u->msg), AVAHI_MESSAGE_PUBLISH_ALL, u, 0, NULL, NULL);
break;
case AVAHI_CLIENT_S_COLLISION:
pa_log_debug("Host name collision");
unpublish_all_services(u, false);
break;
case AVAHI_CLIENT_FAILURE:
if (avahi_client_errno(c) == AVAHI_ERR_DISCONNECTED) {
int error;
pa_log_debug("Avahi daemon disconnected.");
unpublish_all_services(u, true);
avahi_client_free(u->client);
if (!(u->client = avahi_client_new(u->avahi_poll, AVAHI_CLIENT_NO_FAIL, client_callback, u, &error))) {
pa_log("avahi_client_new() failed: %s", avahi_strerror(error));
pa_module_unload_request(u->module, true);
}
}
break;
default: ;
}
}
/* Runs in Avahi mainloop context */
static void create_client(pa_mainloop_api *api PA_GCC_UNUSED, void *userdata) {
struct userdata *u = (struct userdata *) userdata;
int error;
pa_thread_mq_install(&u->thread_mq);
if (!(u->client = avahi_client_new(u->avahi_poll, AVAHI_CLIENT_NO_FAIL, client_callback, u, &error))) {
pa_log("avahi_client_new() failed: %s", avahi_strerror(error));
goto fail;
}
pa_log_debug("Started Avahi threaded mainloop");
return;
fail:
pa_asyncmsgq_post(u->thread_mq.outq, PA_MSGOBJECT(u->msg), AVAHI_MESSAGE_SHUTDOWN_START, u, 0, NULL, NULL);
}
int pa__init(pa_module*m) {
struct userdata *u;
pa_modargs *ma = NULL;
char *hn, *un;
if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
pa_log("Failed to parse module arguments.");
goto fail;
}
m->userdata = u = pa_xnew(struct userdata, 1);
u->core = m->core;
u->module = m;
u->native = pa_native_protocol_get(u->core);
u->rtpoll = pa_rtpoll_new();
u->mainloop = pa_threaded_mainloop_new();
u->api = pa_threaded_mainloop_get_api(u->mainloop);
pa_thread_mq_init(&u->thread_mq, u->core->mainloop, u->rtpoll);
u->msg = pa_msgobject_new(avahi_msg);
u->msg->parent.process_msg = avahi_process_msg;
u->avahi_poll = pa_avahi_poll_new(u->api);
u->services = pa_hashmap_new_full(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func, NULL, (pa_free_cb_t) service_free);
u->sink_new_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_PUT], PA_HOOK_LATE, (pa_hook_cb_t) device_new_or_changed_cb, u);
u->sink_changed_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_PROPLIST_CHANGED], PA_HOOK_LATE, (pa_hook_cb_t) device_new_or_changed_cb, u);
u->sink_unlink_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_UNLINK], PA_HOOK_LATE, (pa_hook_cb_t) device_unlink_cb, u);
u->source_new_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_PUT], PA_HOOK_LATE, (pa_hook_cb_t) device_new_or_changed_cb, u);
u->source_changed_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_PROPLIST_CHANGED], PA_HOOK_LATE, (pa_hook_cb_t) device_new_or_changed_cb, u);
u->source_unlink_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_UNLINK], PA_HOOK_LATE, (pa_hook_cb_t) device_unlink_cb, u);
u->main_entry_group = NULL;
un = pa_get_user_name_malloc();
hn = pa_get_host_name_malloc();
u->service_name = pa_truncate_utf8(pa_sprintf_malloc("%s@%s", un, hn), AVAHI_LABEL_MAX-1);
pa_xfree(un);
pa_xfree(hn);
pa_threaded_mainloop_set_name(u->mainloop, "avahi-ml");
pa_threaded_mainloop_start(u->mainloop);
pa_threaded_mainloop_lock(u->mainloop);
pa_mainloop_api_once(u->api, create_client, u);
pa_threaded_mainloop_unlock(u->mainloop);
pa_modargs_free(ma);
return 0;
fail:
pa__done(m);
if (ma)
pa_modargs_free(ma);
return -1;
}
/* Runs in Avahi mainloop context */
static void client_free(pa_mainloop_api *api PA_GCC_UNUSED, void *userdata) {
struct userdata *u = (struct userdata *) userdata;
pa_hashmap_free(u->services);
if (u->main_entry_group)
avahi_entry_group_free(u->main_entry_group);
if (u->client)
avahi_client_free(u->client);
if (u->avahi_poll)
pa_avahi_poll_free(u->avahi_poll);
pa_asyncmsgq_post(u->thread_mq.outq, PA_MSGOBJECT(u->msg), AVAHI_MESSAGE_SHUTDOWN_COMPLETE, NULL, 0, NULL, NULL);
}
void pa__done(pa_module*m) {
struct userdata*u;
pa_assert(m);
if (!(u = m->userdata))
return;
pa_mainloop_api_once(u->api, client_free, u);
pa_asyncmsgq_wait_for(u->thread_mq.outq, AVAHI_MESSAGE_SHUTDOWN_COMPLETE);
pa_threaded_mainloop_stop(u->mainloop);
pa_threaded_mainloop_free(u->mainloop);
pa_thread_mq_done(&u->thread_mq);
pa_rtpoll_free(u->rtpoll);
if (u->sink_new_slot)
pa_hook_slot_free(u->sink_new_slot);
if (u->source_new_slot)
pa_hook_slot_free(u->source_new_slot);
if (u->sink_changed_slot)
pa_hook_slot_free(u->sink_changed_slot);
if (u->source_changed_slot)
pa_hook_slot_free(u->source_changed_slot);
if (u->sink_unlink_slot)
pa_hook_slot_free(u->sink_unlink_slot);
if (u->source_unlink_slot)
pa_hook_slot_free(u->source_unlink_slot);
if (u->native)
pa_native_protocol_unref(u->native);
pa_xfree(u->msg);
pa_xfree(u->service_name);
pa_xfree(u);
}
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