zeroconf: native avahi, and working fallbacks

* supports avahi through its native interface
* starts embedded deamon if found
* tested all fallbacks on ubuntu
* Service is a normal object now
* several smaller improvements
Change-Id: I36288ec6fcefb64a60b6284e4d86d4b589ba37b5
Reviewed-by: Christian Kandeler <christian.kandeler@nokia.com>

2 files changed, 431 insertions, 0 deletions

diff --git a/src/libs/zeroconf/avahi-client/client.h b/src/libs/zeroconf/avahi-client/client.h
new file mode 100644
index 0000000000..1039da57af
--- /dev/null
+++ b/src/libs/zeroconf/avahi-client/client.h
@@ -0,0 +1,117 @@
+#ifndef fooclienthfoo
+#define fooclienthfoo
+
+/***
+  This file is part of avahi.
+
+  avahi 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.
+
+  avahi 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 Lesser General
+  Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with avahi; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+  USA.
+***/
+
+#include <inttypes.h>
+
+#include <avahi-common/cdecl.h>
+#include <avahi-common/address.h>
+#include <avahi-common/strlst.h>
+#include <avahi-common/defs.h>
+#include <avahi-common/watch.h>
+#include <avahi-common/gccmacro.h>
+
+/** \file client.h Definitions and functions for the client API over D-Bus */
+
+AVAHI_C_DECL_BEGIN
+
+/** A connection context */
+typedef struct AvahiClient AvahiClient;
+
+/** States of a client object, a superset of AvahiServerState */
+typedef enum {
+    AVAHI_CLIENT_S_REGISTERING = AVAHI_SERVER_REGISTERING,  /**< Server state: REGISTERING */
+    AVAHI_CLIENT_S_RUNNING = AVAHI_SERVER_RUNNING,          /**< Server state: RUNNING */
+    AVAHI_CLIENT_S_COLLISION = AVAHI_SERVER_COLLISION,      /**< Server state: COLLISION */
+    AVAHI_CLIENT_FAILURE = 100,                             /**< Some kind of error happened on the client side */
+    AVAHI_CLIENT_CONNECTING = 101                           /**< We're still connecting. This state is only entered when AVAHI_CLIENT_NO_FAIL has been passed to avahi_client_new() and the daemon is not yet available. */
+} AvahiClientState;
+
+typedef enum {
+    AVAHI_CLIENT_IGNORE_USER_CONFIG = 1, /**< Don't read user configuration */
+    AVAHI_CLIENT_NO_FAIL = 2        /**< Don't fail if the daemon is not available when avahi_client_new() is called, instead enter AVAHI_CLIENT_CONNECTING state and wait for the daemon to appear */
+} AvahiClientFlags;
+
+/** The function prototype for the callback of an AvahiClient */
+typedef void (*AvahiClientCallback) (
+    AvahiClient *s,
+    AvahiClientState state /**< The new state of the client */,
+    void* userdata /**< The user data that was passed to avahi_client_new() */);
+
+/** @{ \name Construction and destruction */
+
+/** Creates a new client instance */
+AvahiClient* avahi_client_new (
+    const AvahiPoll *poll_api /**< The abstract event loop API to use */,
+    AvahiClientFlags flags /**< Some flags to modify the behaviour of  the client library */,
+    AvahiClientCallback callback /**< A callback that is called whenever the state of the client changes. This may be NULL. Please note that this function is called for the first time from within the avahi_client_new() context! Thus, in the callback you should not make use of global variables that are initialized only after your call to avahi_client_new(). A common mistake is to store the AvahiClient pointer returned by avahi_client_new() in a global variable and assume that this global variable already contains the valid pointer when the callback is called for the first time. A work-around for this is to always use the AvahiClient pointer passed to the callback function instead of the global pointer.  */,
+    void *userdata /**< Some arbitrary user data pointer that will be passed to the callback function */,
+    int *error /**< If creation of the client fails, this integer will contain the error cause. May be NULL if you aren't interested in the reason why avahi_client_new() failed. */);
+
+/** Free a client instance. This will automatically free all
+ * associated browser, resolve and entry group objects. All pointers
+ * to such objects become invalid! */
+void avahi_client_free(AvahiClient *client);
+
+/** @} */
+
+/** @{ \name Properties */
+
+/** Get the version of the server */
+const char* avahi_client_get_version_string (AvahiClient*);
+
+/** Get host name */
+const char* avahi_client_get_host_name (AvahiClient*);
+
+/** Set host name. \since 0.6.13 */
+int avahi_client_set_host_name(AvahiClient*, const char *name);
+
+/** Get domain name */
+const char* avahi_client_get_domain_name (AvahiClient*);
+
+/** Get FQDN domain name */
+const char* avahi_client_get_host_name_fqdn (AvahiClient*);
+
+/** Get state */
+AvahiClientState avahi_client_get_state(AvahiClient *client);
+
+/** @{ \name Error Handling */
+
+/** Get the last error number. See avahi_strerror() for converting this error code into a human readable string. */
+int avahi_client_errno (AvahiClient*);
+
+/** @} */
+
+/** \cond fulldocs */
+/** Return the local service cookie. returns AVAHI_SERVICE_COOKIE_INVALID on failure. */
+uint32_t avahi_client_get_local_service_cookie(AvahiClient *client);
+/** \endcond */
+
+/** @{ \name Libc NSS Support */
+
+/** Return 1 if gethostbyname() supports mDNS lookups, 0 otherwise. \since 0.6.5 */
+int avahi_nss_support(void);
+
+/** @} */
+
+AVAHI_C_DECL_END
+
+#endif
diff --git a/src/libs/zeroconf/avahi-client/lookup.h b/src/libs/zeroconf/avahi-client/lookup.h
new file mode 100644
index 0000000000..52407f4aa5
--- /dev/null
+++ b/src/libs/zeroconf/avahi-client/lookup.h
@@ -0,0 +1,314 @@
+#ifndef fooclientlookuphfoo
+#define fooclientlookuphfoo
+
+/***
+  This file is part of avahi.
+
+  avahi 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.
+
+  avahi 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 Lesser General
+  Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with avahi; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+  USA.
+***/
+
+#include <inttypes.h>
+
+#include <avahi-common/cdecl.h>
+#include <avahi-common/address.h>
+#include <avahi-common/strlst.h>
+#include <avahi-common/defs.h>
+#include <avahi-common/watch.h>
+#include <avahi-common/gccmacro.h>
+
+#include <avahi-client/client.h>
+
+/** \file avahi-client/lookup.h Lookup Client API */
+
+/** \example client-browse-services.c Example how to browse for DNS-SD
+ * services using the client interface to avahi-daemon. */
+
+AVAHI_C_DECL_BEGIN
+
+/** @{ \name Domain Browser */
+
+/** A domain browser object */
+typedef struct AvahiDomainBrowser AvahiDomainBrowser;
+
+/** The function prototype for the callback of an AvahiDomainBrowser */
+typedef void (*AvahiDomainBrowserCallback) (
+    AvahiDomainBrowser *b,
+    AvahiIfIndex interface,
+    AvahiProtocol protocol,
+    AvahiBrowserEvent event,
+    const char *domain,
+    AvahiLookupResultFlags flags,
+    void *userdata);
+
+/** Browse for domains on the local network */
+AvahiDomainBrowser* avahi_domain_browser_new (
+    AvahiClient *client,
+    AvahiIfIndex interface,
+    AvahiProtocol protocol,
+    const char *domain,
+    AvahiDomainBrowserType btype,
+    AvahiLookupFlags flags,
+    AvahiDomainBrowserCallback callback,
+    void *userdata);
+
+/** Get the parent client of an AvahiDomainBrowser object */
+AvahiClient* avahi_domain_browser_get_client (AvahiDomainBrowser *);
+
+/** Cleans up and frees an AvahiDomainBrowser object */
+int avahi_domain_browser_free (AvahiDomainBrowser *);
+
+/** @} */
+
+/** @{ \name Service Browser */
+
+/** A service browser object */
+typedef struct AvahiServiceBrowser AvahiServiceBrowser;
+
+/** The function prototype for the callback of an AvahiServiceBrowser */
+typedef void (*AvahiServiceBrowserCallback) (
+    AvahiServiceBrowser *b,
+    AvahiIfIndex interface,
+    AvahiProtocol protocol,
+    AvahiBrowserEvent event,
+    const char *name,
+    const char *type,
+    const char *domain,
+    AvahiLookupResultFlags flags,
+    void *userdata);
+
+/** Browse for services of a type on the network. In most cases you
+ * probably want to pass AVAHI_IF_UNSPEC and AVAHI_PROTO_UNSPED in
+ * interface, resp. protocol to browse on all local networks. The
+ * specified callback will be called whenever a new service appears
+ * or is removed from the network. Please note that events may be
+ * collapsed to minimize traffic (i.e. a REMOVED followed by a NEW for
+ * the same service data is dropped because redundant). If you want to
+ * subscribe to service data changes, you should use
+ * avahi_service_resolver_new() and keep it open, in which case you
+ * will be notified via AVAHI_RESOLVE_FOUND everytime the service data
+ * changes. */
+AvahiServiceBrowser* avahi_service_browser_new (
+    AvahiClient *client,
+    AvahiIfIndex interface,     /**< In most cases pass AVAHI_IF_UNSPEC here */
+    AvahiProtocol protocol,     /**< In most cases pass AVAHI_PROTO_UNSPEC here */
+    const char *type,           /**< A service type such as "_http._tcp" */
+    const char *domain,         /**< A domain to browse in. In most cases you want to pass NULL here for the default domain (usually ".local") */
+    AvahiLookupFlags flags,
+    AvahiServiceBrowserCallback callback,
+    void *userdata);
+
+/** Get the parent client of an AvahiServiceBrowser object */
+AvahiClient* avahi_service_browser_get_client (AvahiServiceBrowser *);
+
+/** Cleans up and frees an AvahiServiceBrowser object */
+int avahi_service_browser_free (AvahiServiceBrowser *);
+
+/** @} */
+
+/** \cond fulldocs */
+/** A service type browser object */
+typedef struct AvahiServiceTypeBrowser AvahiServiceTypeBrowser;
+
+/** The function prototype for the callback of an AvahiServiceTypeBrowser */
+typedef void (*AvahiServiceTypeBrowserCallback) (
+    AvahiServiceTypeBrowser *b,
+    AvahiIfIndex interface,
+    AvahiProtocol protocol,
+    AvahiBrowserEvent event,
+    const char *type,
+    const char *domain,
+    AvahiLookupResultFlags flags,
+    void *userdata);
+
+/** Browse for service types on the local network */
+AvahiServiceTypeBrowser* avahi_service_type_browser_new (
+    AvahiClient *client,
+    AvahiIfIndex interface,
+    AvahiProtocol protocol,
+    const char *domain,
+    AvahiLookupFlags flags,
+    AvahiServiceTypeBrowserCallback callback,
+    void *userdata);
+
+/** Get the parent client of an AvahiServiceTypeBrowser object */
+AvahiClient* avahi_service_type_browser_get_client (AvahiServiceTypeBrowser *);
+
+/** Cleans up and frees an AvahiServiceTypeBrowser object */
+int avahi_service_type_browser_free (AvahiServiceTypeBrowser *);
+
+/** \endcond */
+
+/** @{ \name Service Resolver */
+
+/** A service resolver object */
+typedef struct AvahiServiceResolver AvahiServiceResolver;
+
+/** The function prototype for the callback of an AvahiServiceResolver */
+typedef void (*AvahiServiceResolverCallback) (
+    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);
+
+/** Create a new service resolver object. Please make sure to pass all
+ * the service data you received via avahi_service_browser_new()'s
+ * callback function, especially interface and protocol. The protocol
+ * argument specifies the protocol (IPv4 or IPv6) to use as transport
+ * for the queries which are sent out by this resolver. The
+ * aprotocol argument specifies the adress family (IPv4 or IPv6) of
+ * the address of the service we are looking for. Generally, on
+ * "protocol" you should only pass what was supplied to you as
+ * parameter to your AvahiServiceBrowserCallback. In "aprotocol" you
+ * should pass what your application code can deal with when
+ * connecting to the service. Or, more technically speaking: protocol
+ * specifies if the mDNS queries should be sent as UDP/IPv4
+ * resp. UDP/IPv6 packets. aprotocol specifies whether the query is for a A
+ * resp. AAAA resource record. */
+AvahiServiceResolver * avahi_service_resolver_new(
+    AvahiClient *client,
+    AvahiIfIndex interface,   /**< Pass the interface argument you received in AvahiServiceBrowserCallback here. */
+    AvahiProtocol protocol,   /**< Pass the protocol argument you received in AvahiServiceBrowserCallback here. */
+    const char *name,         /**< Pass the name argument you received in AvahiServiceBrowserCallback here. */
+    const char *type,         /**< Pass the type argument you received in AvahiServiceBrowserCallback here. */
+    const char *domain,       /**< Pass the domain argument you received in AvahiServiceBrowserCallback here. */
+    AvahiProtocol aprotocol,  /**< The desired address family of the service address to resolve. AVAHI_PROTO_UNSPEC if your application can deal with both IPv4 and IPv6 */
+    AvahiLookupFlags flags,
+    AvahiServiceResolverCallback callback,
+    void *userdata);
+
+/** Get the parent client of an AvahiServiceResolver object */
+AvahiClient* avahi_service_resolver_get_client (AvahiServiceResolver *);
+
+/** Free a service resolver object */
+int avahi_service_resolver_free(AvahiServiceResolver *r);
+
+/** @} */
+
+/** \cond fulldocs */
+/** A service resolver object */
+typedef struct AvahiHostNameResolver AvahiHostNameResolver;
+
+/** The function prototype for the callback of an AvahiHostNameResolver */
+typedef void (*AvahiHostNameResolverCallback) (
+    AvahiHostNameResolver *r,
+    AvahiIfIndex interface,
+    AvahiProtocol protocol,
+    AvahiResolverEvent event,
+    const char *name,
+    const AvahiAddress *a,
+    AvahiLookupResultFlags flags,
+    void *userdata);
+
+/** Create a new hostname resolver object */
+AvahiHostNameResolver * avahi_host_name_resolver_new(
+    AvahiClient *client,
+    AvahiIfIndex interface,
+    AvahiProtocol protocol,
+    const char *name,
+    AvahiProtocol aprotocol,
+    AvahiLookupFlags flags,
+    AvahiHostNameResolverCallback callback,
+    void *userdata);
+
+/** Get the parent client of an AvahiHostNameResolver object */
+AvahiClient* avahi_host_name_resolver_get_client (AvahiHostNameResolver *);
+
+/** Free a hostname resolver object */
+int avahi_host_name_resolver_free(AvahiHostNameResolver *r);
+
+/** An address resolver object */
+typedef struct AvahiAddressResolver AvahiAddressResolver;
+
+/** The function prototype for the callback of an AvahiAddressResolver */
+typedef void (*AvahiAddressResolverCallback) (
+    AvahiAddressResolver *r,
+    AvahiIfIndex interface,
+    AvahiProtocol protocol,
+    AvahiResolverEvent event,
+    const AvahiAddress *a,
+    const char *name,
+    AvahiLookupResultFlags flags,
+    void *userdata);
+
+/** Create a new address resolver object from an AvahiAddress object */
+AvahiAddressResolver* avahi_address_resolver_new(
+    AvahiClient *client,
+    AvahiIfIndex interface,
+    AvahiProtocol protocol,
+    const AvahiAddress *a,
+    AvahiLookupFlags flags,
+    AvahiAddressResolverCallback callback,
+    void *userdata);
+
+/** Get the parent client of an AvahiAddressResolver object */
+AvahiClient* avahi_address_resolver_get_client (AvahiAddressResolver *);
+
+/** Free a AvahiAddressResolver resolver object */
+int avahi_address_resolver_free(AvahiAddressResolver *r);
+
+/** \endcond */
+
+/** @{ \name Record Browser */
+
+/** A record browser object */
+typedef struct AvahiRecordBrowser AvahiRecordBrowser;
+
+/** The function prototype for the callback of an AvahiRecordBrowser */
+typedef void (*AvahiRecordBrowserCallback) (
+    AvahiRecordBrowser *b,
+    AvahiIfIndex interface,
+    AvahiProtocol protocol,
+    AvahiBrowserEvent event,
+    const char *name,
+    uint16_t clazz,
+    uint16_t type,
+    const void *rdata,
+    size_t size,
+    AvahiLookupResultFlags flags,
+    void *userdata);
+
+/** Browse for records of a type on the local network */
+AvahiRecordBrowser* avahi_record_browser_new(
+    AvahiClient *client,
+    AvahiIfIndex interface,
+    AvahiProtocol protocol,
+    const char *name,
+    uint16_t clazz,
+    uint16_t type,
+    AvahiLookupFlags flags,
+    AvahiRecordBrowserCallback callback,
+    void *userdata);
+
+/** Get the parent client of an AvahiRecordBrowser object */
+AvahiClient* avahi_record_browser_get_client(AvahiRecordBrowser *);
+
+/** Cleans up and frees an AvahiRecordBrowser object */
+int avahi_record_browser_free(AvahiRecordBrowser *);
+
+/** @} */
+
+AVAHI_C_DECL_END
+
+#endif