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-rw-r--r--src/modules/module-raop-discover.c380
1 files changed, 380 insertions, 0 deletions
diff --git a/src/modules/module-raop-discover.c b/src/modules/module-raop-discover.c
new file mode 100644
index 00000000..7f623617
--- /dev/null
+++ b/src/modules/module-raop-discover.c
@@ -0,0 +1,380 @@
+/* $Id$ */
+
+/***
+ This file is part of PulseAudio.
+
+ Copyright 2008 Colin Guthrie
+
+ 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 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 <string.h>
+#include <unistd.h>
+
+#include <avahi-client/client.h>
+#include <avahi-client/lookup.h>
+#include <avahi-common/alternative.h>
+#include <avahi-common/error.h>
+#include <avahi-common/domain.h>
+#include <avahi-common/malloc.h>
+
+#include <pulse/xmalloc.h>
+#include <pulse/util.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/core-subscribe.h>
+#include <pulsecore/hashmap.h>
+#include <pulsecore/modargs.h>
+#include <pulsecore/namereg.h>
+#include <pulsecore/avahi-wrap.h>
+
+#include "module-raop-discover-symdef.h"
+
+PA_MODULE_AUTHOR("Colin Guthrie");
+PA_MODULE_DESCRIPTION("mDNS/DNS-SD Service Discovery of Airtunes");
+PA_MODULE_VERSION(PACKAGE_VERSION);
+PA_MODULE_LOAD_ONCE(TRUE);
+
+#define SERVICE_TYPE_SINK "_raop._tcp"
+
+static const char* const valid_modargs[] = {
+ NULL
+};
+
+struct tunnel {
+ AvahiIfIndex interface;
+ AvahiProtocol protocol;
+ char *name, *type, *domain;
+ uint32_t module_index;
+};
+
+struct userdata {
+ pa_core *core;
+ pa_module *module;
+ AvahiPoll *avahi_poll;
+ AvahiClient *client;
+ AvahiServiceBrowser *sink_browser;
+
+ pa_hashmap *tunnels;
+};
+
+static unsigned tunnel_hash(const void *p) {
+ const struct tunnel *t = p;
+
+ return
+ (unsigned) t->interface +
+ (unsigned) t->protocol +
+ pa_idxset_string_hash_func(t->name) +
+ pa_idxset_string_hash_func(t->type) +
+ pa_idxset_string_hash_func(t->domain);
+}
+
+static int tunnel_compare(const void *a, const void *b) {
+ const struct tunnel *ta = a, *tb = b;
+ int r;
+
+ if (ta->interface != tb->interface)
+ return 1;
+ if (ta->protocol != tb->protocol)
+ return 1;
+ if ((r = strcmp(ta->name, tb->name)))
+ return r;
+ if ((r = strcmp(ta->type, tb->type)))
+ return r;
+ if ((r = strcmp(ta->domain, tb->domain)))
+ return r;
+
+ return 0;
+}
+
+static struct tunnel *tunnel_new(
+ AvahiIfIndex interface, AvahiProtocol protocol,
+ const char *name, const char *type, const char *domain) {
+
+ struct tunnel *t;
+ t = pa_xnew(struct tunnel, 1);
+ t->interface = interface;
+ t->protocol = protocol;
+ t->name = pa_xstrdup(name);
+ t->type = pa_xstrdup(type);
+ t->domain = pa_xstrdup(domain);
+ t->module_index = PA_IDXSET_INVALID;
+ return t;
+}
+
+static void tunnel_free(struct tunnel *t) {
+ pa_assert(t);
+ pa_xfree(t->name);
+ pa_xfree(t->type);
+ pa_xfree(t->domain);
+ pa_xfree(t);
+}
+
+static void resolver_cb(
+ AvahiServiceResolver *r,
+ AvahiIfIndex interface, AvahiProtocol protocol,
+ AvahiResolverEvent event,
+ const char *name, const char *type, const char *domain,
+ const char *host_name, const AvahiAddress *a, uint16_t port,
+ AvahiStringList *txt,
+ AvahiLookupResultFlags flags,
+ void *userdata) {
+
+ struct userdata *u = userdata;
+ struct tunnel *tnl;
+
+ pa_assert(u);
+
+ tnl = tunnel_new(interface, protocol, name, type, domain);
+
+ if (event != AVAHI_RESOLVER_FOUND)
+ pa_log("Resolving of '%s' failed: %s", name, avahi_strerror(avahi_client_errno(u->client)));
+ else {
+ char *device = NULL, *dname, *args;
+ char at[AVAHI_ADDRESS_STR_MAX];
+ AvahiStringList *l;
+ pa_module *m;
+
+ for (l = txt; l; l = l->next) {
+ char *key, *value;
+ pa_assert_se(avahi_string_list_get_pair(l, &key, &value, NULL) == 0);
+
+ pa_log_debug("Found key: '%s' with value: '%s'", key, value);
+ if (strcmp(key, "device") == 0) {
+ pa_xfree(device);
+ device = value;
+ value = NULL;
+ }
+ avahi_free(key);
+ avahi_free(value);
+ }
+
+ if (device)
+ dname = pa_sprintf_malloc("airtunes.%s.%s", host_name, device);
+ else
+ dname = pa_sprintf_malloc("airtunes.%s", host_name);
+
+ if (!pa_namereg_is_valid_name(dname)) {
+ pa_log("Cannot construct valid device name from credentials of service '%s'.", dname);
+ avahi_free(device);
+ pa_xfree(dname);
+ goto finish;
+ }
+
+ /*
+ TODO: allow this syntax of server name in things....
+ args = pa_sprintf_malloc("server=[%s]:%u "
+ "sink_name=%s",
+ avahi_address_snprint(at, sizeof(at), a), port,
+ dname);*/
+ args = pa_sprintf_malloc("server=%s "
+ "sink_name=%s",
+ avahi_address_snprint(at, sizeof(at), a),
+ dname);
+
+ pa_log_debug("Loading module-raop-sink with arguments '%s'", args);
+
+ if ((m = pa_module_load(u->core, "module-raop-sink", args))) {
+ tnl->module_index = m->index;
+ pa_hashmap_put(u->tunnels, tnl, tnl);
+ tnl = NULL;
+ }
+
+ pa_xfree(dname);
+ pa_xfree(args);
+ avahi_free(device);
+ }
+
+finish:
+
+ avahi_service_resolver_free(r);
+
+ if (tnl)
+ tunnel_free(tnl);
+}
+
+static void browser_cb(
+ AvahiServiceBrowser *b,
+ AvahiIfIndex interface, AvahiProtocol protocol,
+ AvahiBrowserEvent event,
+ const char *name, const char *type, const char *domain,
+ AvahiLookupResultFlags flags,
+ void *userdata) {
+
+ struct userdata *u = userdata;
+ struct tunnel *t;
+
+ pa_assert(u);
+
+ if (flags & AVAHI_LOOKUP_RESULT_LOCAL)
+ return;
+
+ t = tunnel_new(interface, protocol, name, type, domain);
+
+ if (event == AVAHI_BROWSER_NEW) {
+
+ if (!pa_hashmap_get(u->tunnels, t))
+ if (!(avahi_service_resolver_new(u->client, interface, protocol, name, type, domain, AVAHI_PROTO_UNSPEC, 0, resolver_cb, u)))
+ pa_log("avahi_service_resolver_new() failed: %s", avahi_strerror(avahi_client_errno(u->client)));
+
+ /* We ignore the returned resolver object here, since the we don't
+ * need to attach any special data to it, and we can still destory
+ * it from the callback */
+
+ } else if (event == AVAHI_BROWSER_REMOVE) {
+ struct tunnel *t2;
+
+ if ((t2 = pa_hashmap_get(u->tunnels, t))) {
+ pa_module_unload_by_index(u->core, t2->module_index);
+ pa_hashmap_remove(u->tunnels, t2);
+ tunnel_free(t2);
+ }
+ }
+
+ tunnel_free(t);
+}
+
+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_REGISTERING:
+ case AVAHI_CLIENT_S_RUNNING:
+ case AVAHI_CLIENT_S_COLLISION:
+
+ if (!u->sink_browser) {
+
+ if (!(u->sink_browser = avahi_service_browser_new(
+ c,
+ AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC,
+ SERVICE_TYPE_SINK,
+ NULL,
+ 0,
+ browser_cb, u))) {
+
+ pa_log("avahi_service_browser_new() failed: %s", avahi_strerror(avahi_client_errno(c)));
+ pa_module_unload_request(u->module);
+ }
+ }
+
+ break;
+
+ case AVAHI_CLIENT_FAILURE:
+ if (avahi_client_errno(c) == AVAHI_ERR_DISCONNECTED) {
+ int error;
+
+ pa_log_debug("Avahi daemon disconnected.");
+
+ 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);
+ }
+ }
+
+ /* Fall through */
+
+ case AVAHI_CLIENT_CONNECTING:
+
+ if (u->sink_browser) {
+ avahi_service_browser_free(u->sink_browser);
+ u->sink_browser = NULL;
+ }
+
+ break;
+
+ default: ;
+ }
+}
+
+int pa__init(pa_module*m) {
+
+ struct userdata *u;
+ pa_modargs *ma = NULL;
+ int error;
+
+ 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->sink_browser = NULL;
+
+ u->tunnels = pa_hashmap_new(tunnel_hash, tunnel_compare);
+
+ u->avahi_poll = pa_avahi_poll_new(m->core->mainloop);
+
+ if (!(u->client = avahi_client_new(u->avahi_poll, AVAHI_CLIENT_NO_FAIL, client_callback, u, &error))) {
+ pa_log("pa_avahi_client_new() failed: %s", avahi_strerror(error));
+ goto fail;
+ }
+
+ pa_modargs_free(ma);
+
+ return 0;
+
+fail:
+ pa__done(m);
+
+ if (ma)
+ pa_modargs_free(ma);
+
+ return -1;
+}
+
+void pa__done(pa_module*m) {
+ struct userdata*u;
+ pa_assert(m);
+
+ if (!(u = m->userdata))
+ return;
+
+ if (u->client)
+ avahi_client_free(u->client);
+
+ if (u->avahi_poll)
+ pa_avahi_poll_free(u->avahi_poll);
+
+ if (u->tunnels) {
+ struct tunnel *t;
+
+ while ((t = pa_hashmap_steal_first(u->tunnels))) {
+ pa_module_unload_by_index(u->core, t->module_index);
+ tunnel_free(t);
+ }
+
+ pa_hashmap_free(u->tunnels, NULL, NULL);
+ }
+
+ pa_xfree(u);
+}
generated by cgit (git 2.34.1) at 2025-11-04 14:28:12 +0000