[deb_shairplay.git] / src / lib / dnssd.c

/**
 *  Copyright (C) 2011-2012  Juho Vähä-Herttua
 *
 *  This library 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.
 *
 *  This library 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.
 */

#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <assert.h>

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "dnssd.h"
#include "dnssdint.h"
#include "global.h"
#include "compat.h"
#include "utils.h"

#define MAX_DEVICEID 18
#define MAX_SERVNAME 256

#define USE_LIBDL (defined(HAVE_LIBDL) && !defined(__APPLE__))

#if defined(WIN32) || USE_LIBDL
# ifdef WIN32
#  include <stdint.h>
#  if !defined(EFI32) && !defined(EFI64)
#   define DNSSD_STDCALL __stdcall
#  else
#   define DNSSD_STDCALL
#  endif
# else
#  include <dlfcn.h>
#  define DNSSD_STDCALL
# endif

typedef struct _DNSServiceRef_t *DNSServiceRef;
typedef union _TXTRecordRef_t { char PrivateData[16]; char *ForceNaturalAlignment; } TXTRecordRef;

typedef uint32_t DNSServiceFlags;
typedef int32_t  DNSServiceErrorType;

typedef void (DNSSD_STDCALL *DNSServiceRegisterReply)
    (
    DNSServiceRef                       sdRef,
    DNSServiceFlags                     flags,
    DNSServiceErrorType                 errorCode,
    const char                          *name,
    const char                          *regtype,
    const char                          *domain,
    void                                *context
    );

#else
# include <dns_sd.h>
# define DNSSD_STDCALL
#endif

typedef DNSServiceErrorType (DNSSD_STDCALL *DNSServiceRegister_t)
    (
    DNSServiceRef                       *sdRef,
    DNSServiceFlags                     flags,
    uint32_t                            interfaceIndex,
    const char                          *name,
    const char                          *regtype,
    const char                          *domain,
    const char                          *host,
    uint16_t                            port,
    uint16_t                            txtLen,
    const void                          *txtRecord,
    DNSServiceRegisterReply             callBack,
    void                                *context
    );
typedef void (DNSSD_STDCALL *DNSServiceRefDeallocate_t)(DNSServiceRef sdRef);
typedef void (DNSSD_STDCALL *TXTRecordCreate_t)
    (
    TXTRecordRef     *txtRecord,
    uint16_t         bufferLen,
    void             *buffer
    );
typedef void (DNSSD_STDCALL *TXTRecordDeallocate_t)(TXTRecordRef *txtRecord);
typedef DNSServiceErrorType (DNSSD_STDCALL *TXTRecordSetValue_t)
    (
    TXTRecordRef     *txtRecord,
    const char       *key,
    uint8_t          valueSize,
    const void       *value
    );
typedef uint16_t (DNSSD_STDCALL *TXTRecordGetLength_t)(const TXTRecordRef *txtRecord);
typedef const void * (DNSSD_STDCALL *TXTRecordGetBytesPtr_t)(const TXTRecordRef *txtRecord);


struct dnssd_s {
#ifdef WIN32
	HMODULE module;
#elif USE_LIBDL
	void *module;
#endif

	DNSServiceRegister_t       DNSServiceRegister;
	DNSServiceRefDeallocate_t  DNSServiceRefDeallocate;
	TXTRecordCreate_t          TXTRecordCreate;
	TXTRecordSetValue_t        TXTRecordSetValue;
	TXTRecordGetLength_t       TXTRecordGetLength;
	TXTRecordGetBytesPtr_t     TXTRecordGetBytesPtr;
	TXTRecordDeallocate_t      TXTRecordDeallocate;

	DNSServiceRef raopService;
	DNSServiceRef airplayService;
};


dnssd_t *
dnssd_init(int *error)
{
	dnssd_t *dnssd;

	if (error) *error = DNSSD_ERROR_NOERROR;

	dnssd = calloc(1, sizeof(dnssd_t));
	if (!dnssd) {
		if (error) *error = DNSSD_ERROR_OUTOFMEM;
		return NULL;
	}

#ifdef WIN32
	dnssd->module = LoadLibraryA("dnssd.dll");
	if (!dnssd->module) {
		if (error) *error = DNSSD_ERROR_LIBNOTFOUND;
		free(dnssd);
		return NULL;
	}
	dnssd->DNSServiceRegister = (DNSServiceRegister_t)GetProcAddress(dnssd->module, "DNSServiceRegister");
	dnssd->DNSServiceRefDeallocate = (DNSServiceRefDeallocate_t)GetProcAddress(dnssd->module, "DNSServiceRefDeallocate");
	dnssd->TXTRecordCreate = (TXTRecordCreate_t)GetProcAddress(dnssd->module, "TXTRecordCreate");
	dnssd->TXTRecordSetValue = (TXTRecordSetValue_t)GetProcAddress(dnssd->module, "TXTRecordSetValue");
	dnssd->TXTRecordGetLength = (TXTRecordGetLength_t)GetProcAddress(dnssd->module, "TXTRecordGetLength");
	dnssd->TXTRecordGetBytesPtr = (TXTRecordGetBytesPtr_t)GetProcAddress(dnssd->module, "TXTRecordGetBytesPtr");
	dnssd->TXTRecordDeallocate = (TXTRecordDeallocate_t)GetProcAddress(dnssd->module, "TXTRecordDeallocate");

	if (!dnssd->DNSServiceRegister || !dnssd->DNSServiceRefDeallocate || !dnssd->TXTRecordCreate ||
	    !dnssd->TXTRecordSetValue || !dnssd->TXTRecordGetLength || !dnssd->TXTRecordGetBytesPtr ||
	    !dnssd->TXTRecordDeallocate) {
		if (error) *error = DNSSD_ERROR_PROCNOTFOUND;
		FreeLibrary(dnssd->module);
		free(dnssd);
		return NULL;
	}
#elif USE_LIBDL
	dnssd->module = dlopen("libdns_sd.so", RTLD_LAZY);
	if (!dnssd->module) {
		if (error) *error = DNSSD_ERROR_LIBNOTFOUND;
		free(dnssd);
		return NULL;
	}
	dnssd->DNSServiceRegister = (DNSServiceRegister_t)dlsym(dnssd->module, "DNSServiceRegister");
	dnssd->DNSServiceRefDeallocate = (DNSServiceRefDeallocate_t)dlsym(dnssd->module, "DNSServiceRefDeallocate");
	dnssd->TXTRecordCreate = (TXTRecordCreate_t)dlsym(dnssd->module, "TXTRecordCreate");
	dnssd->TXTRecordSetValue = (TXTRecordSetValue_t)dlsym(dnssd->module, "TXTRecordSetValue");
	dnssd->TXTRecordGetLength = (TXTRecordGetLength_t)dlsym(dnssd->module, "TXTRecordGetLength");
	dnssd->TXTRecordGetBytesPtr = (TXTRecordGetBytesPtr_t)dlsym(dnssd->module, "TXTRecordGetBytesPtr");
	dnssd->TXTRecordDeallocate = (TXTRecordDeallocate_t)dlsym(dnssd->module, "TXTRecordDeallocate");

	if (!dnssd->DNSServiceRegister || !dnssd->DNSServiceRefDeallocate || !dnssd->TXTRecordCreate ||
	    !dnssd->TXTRecordSetValue || !dnssd->TXTRecordGetLength || !dnssd->TXTRecordGetBytesPtr ||
	    !dnssd->TXTRecordDeallocate) {
		if (error) *error = DNSSD_ERROR_PROCNOTFOUND;
		dlclose(dnssd->module);
		free(dnssd);
		return NULL;
	}
#else
	dnssd->DNSServiceRegister = &DNSServiceRegister;
	dnssd->DNSServiceRefDeallocate = &DNSServiceRefDeallocate;
	dnssd->TXTRecordCreate = &TXTRecordCreate;
	dnssd->TXTRecordSetValue = &TXTRecordSetValue;
	dnssd->TXTRecordGetLength = &TXTRecordGetLength;
	dnssd->TXTRecordGetBytesPtr = &TXTRecordGetBytesPtr;
	dnssd->TXTRecordDeallocate = &TXTRecordDeallocate;
#endif

	return dnssd;
}

void
dnssd_destroy(dnssd_t *dnssd)
{
	if (dnssd) {
#ifdef WIN32
		FreeLibrary(dnssd->module);
#elif USE_LIBDL
		dlclose(dnssd->module);
#endif
		free(dnssd);
	}
}

int
dnssd_register_raop(dnssd_t *dnssd, const char *name, unsigned short port, const char *hwaddr, int hwaddrlen, int password)
{
	TXTRecordRef txtRecord;
	char servname[MAX_SERVNAME];
	int ret;

	assert(dnssd);
	assert(name);
	assert(hwaddr);

	dnssd->TXTRecordCreate(&txtRecord, 0, NULL);
	dnssd->TXTRecordSetValue(&txtRecord, "txtvers", strlen(RAOP_TXTVERS), RAOP_TXTVERS);
	dnssd->TXTRecordSetValue(&txtRecord, "ch", strlen(RAOP_CH), RAOP_CH);
	dnssd->TXTRecordSetValue(&txtRecord, "cn", strlen(RAOP_CN), RAOP_CN);
	dnssd->TXTRecordSetValue(&txtRecord, "et", strlen(RAOP_ET), RAOP_ET);
	dnssd->TXTRecordSetValue(&txtRecord, "sv", strlen(RAOP_SV), RAOP_SV);
	dnssd->TXTRecordSetValue(&txtRecord, "da", strlen(RAOP_DA), RAOP_DA);
	dnssd->TXTRecordSetValue(&txtRecord, "sr", strlen(RAOP_SR), RAOP_SR);
	dnssd->TXTRecordSetValue(&txtRecord, "ss", strlen(RAOP_SS), RAOP_SS);
	if (password) {
		dnssd->TXTRecordSetValue(&txtRecord, "pw", strlen("true"), "true");
	} else {
		dnssd->TXTRecordSetValue(&txtRecord, "pw", strlen("false"), "false");
	}
	dnssd->TXTRecordSetValue(&txtRecord, "vn", strlen(RAOP_VN), RAOP_VN);
	dnssd->TXTRecordSetValue(&txtRecord, "tp", strlen(RAOP_TP), RAOP_TP);
	dnssd->TXTRecordSetValue(&txtRecord, "md", strlen(RAOP_MD), RAOP_MD);
	dnssd->TXTRecordSetValue(&txtRecord, "vs", strlen(GLOBAL_VERSION), GLOBAL_VERSION);
	dnssd->TXTRecordSetValue(&txtRecord, "sm", strlen(RAOP_SM), RAOP_SM);
	dnssd->TXTRecordSetValue(&txtRecord, "ek", strlen(RAOP_EK), RAOP_EK);

	/* Convert hardware address to string */
	ret = utils_hwaddr_raop(servname, sizeof(servname), hwaddr, hwaddrlen);
	if (ret < 0) {
		/* FIXME: handle better */
		return -1;
	}

	/* Check that we have bytes for 'hw@name' format */
	if (sizeof(servname) < strlen(servname)+1+strlen(name)+1) {
		/* FIXME: handle better */
		return -2;
	}

	strncat(servname, "@", sizeof(servname)-strlen(servname)-1);
	strncat(servname, name, sizeof(servname)-strlen(servname)-1);

	/* Register the service */
	dnssd->DNSServiceRegister(&dnssd->raopService, 0, 0,
	                          servname, "_raop._tcp",
	                          NULL, NULL,
	                          htons(port),
	                          dnssd->TXTRecordGetLength(&txtRecord),
	                          dnssd->TXTRecordGetBytesPtr(&txtRecord),
	                          NULL, NULL);

	/* Deallocate TXT record */
	dnssd->TXTRecordDeallocate(&txtRecord);
	return 1;
}

int
dnssd_register_airplay(dnssd_t *dnssd, const char *name, unsigned short port, const char *hwaddr, int hwaddrlen)
{
	TXTRecordRef txtRecord;
	char deviceid[3*MAX_HWADDR_LEN];
	char features[16];
	int ret;

	assert(dnssd);
	assert(name);
	assert(hwaddr);

	/* Convert hardware address to string */
	ret = utils_hwaddr_airplay(deviceid, sizeof(deviceid), hwaddr, hwaddrlen);
	if (ret < 0) {
		/* FIXME: handle better */
		return -1;
	}

	features[sizeof(features)-1] = '\0';
	snprintf(features, sizeof(features)-1, "0x%x", GLOBAL_FEATURES);

	dnssd->TXTRecordCreate(&txtRecord, 0, NULL);
	dnssd->TXTRecordSetValue(&txtRecord, "deviceid", strlen(deviceid), deviceid);
	dnssd->TXTRecordSetValue(&txtRecord, "features", strlen(features), features);
	dnssd->TXTRecordSetValue(&txtRecord, "model", strlen(GLOBAL_MODEL), GLOBAL_MODEL);

	/* Register the service */
	dnssd->DNSServiceRegister(&dnssd->airplayService, 0, 0,
	                          name, "_airplay._tcp",
	                          NULL, NULL,
	                          htons(port),
	                          dnssd->TXTRecordGetLength(&txtRecord),
	                          dnssd->TXTRecordGetBytesPtr(&txtRecord),
	                          NULL, NULL);

	/* Deallocate TXT record */
	dnssd->TXTRecordDeallocate(&txtRecord);
	return 0;
}

void
dnssd_unregister_raop(dnssd_t *dnssd)
{
	assert(dnssd);

	if (!dnssd->raopService) {
		return;
	}

	dnssd->DNSServiceRefDeallocate(dnssd->raopService);
	dnssd->raopService = NULL;
}

void
dnssd_unregister_airplay(dnssd_t *dnssd)
{
	assert(dnssd);

	if (!dnssd->airplayService) {
		return;
	}

	dnssd->DNSServiceRefDeallocate(dnssd->airplayService);
	dnssd->airplayService = NULL;
}
Commit	Line	Data
15c988f7 JB	1	/**
	2	* Copyright (C) 2011-2012 Juho Vähä-Herttua
	3	*
	4	* This library is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU Lesser General Public
	6	* License as published by the Free Software Foundation; either
	7	* version 2.1 of the License, or (at your option) any later version.
	8	*
	9	* This library is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	12	* Lesser General Public License for more details.
	13	*/
	14
	15	#include <stdlib.h>
	16	#include <string.h>
	17	#include <stdio.h>
	18	#include <assert.h>
	19
	20	#ifdef HAVE_CONFIG_H
	21	#include "config.h"
	22	#endif
	23
	24	#include "dnssd.h"
	25	#include "dnssdint.h"
	26	#include "global.h"
	27	#include "compat.h"
	28	#include "utils.h"
	29
	30	#define MAX_DEVICEID 18
	31	#define MAX_SERVNAME 256
	32
	33	#define USE_LIBDL (defined(HAVE_LIBDL) && !defined(__APPLE__))
	34
	35	#if defined(WIN32) \|\| USE_LIBDL
	36	# ifdef WIN32
	37	# include <stdint.h>
	38	# if !defined(EFI32) && !defined(EFI64)
	39	# define DNSSD_STDCALL __stdcall
	40	# else
	41	# define DNSSD_STDCALL
	42	# endif
	43	# else
	44	# include <dlfcn.h>
	45	# define DNSSD_STDCALL
	46	# endif
	47
	48	typedef struct _DNSServiceRef_t *DNSServiceRef;
	49	typedef union _TXTRecordRef_t { char PrivateData[16]; char *ForceNaturalAlignment; } TXTRecordRef;
	50
	51	typedef uint32_t DNSServiceFlags;
	52	typedef int32_t DNSServiceErrorType;
	53
	54	typedef void (DNSSD_STDCALL *DNSServiceRegisterReply)
	55	(
	56	DNSServiceRef sdRef,
	57	DNSServiceFlags flags,
	58	DNSServiceErrorType errorCode,
	59	const char *name,
	60	const char *regtype,
	61	const char *domain,
	62	void *context
	63	);
	64
65	#else
66	# include <dns_sd.h>
67	# define DNSSD_STDCALL
68	#endif
69
70	typedef DNSServiceErrorType (DNSSD_STDCALL *DNSServiceRegister_t)
71	(
72	DNSServiceRef *sdRef,
73	DNSServiceFlags flags,
74	uint32_t interfaceIndex,
75	const char *name,
76	const char *regtype,
77	const char *domain,
78	const char *host,
79	uint16_t port,
80	uint16_t txtLen,
81	const void *txtRecord,
82	DNSServiceRegisterReply callBack,
83	void *context
84	);
85	typedef void (DNSSD_STDCALL *DNSServiceRefDeallocate_t)(DNSServiceRef sdRef);
86	typedef void (DNSSD_STDCALL *TXTRecordCreate_t)
87	(
88	TXTRecordRef *txtRecord,
89	uint16_t bufferLen,
90	void *buffer
91	);
92	typedef void (DNSSD_STDCALL TXTRecordDeallocate_t)(TXTRecordRef txtRecord);
93	typedef DNSServiceErrorType (DNSSD_STDCALL *TXTRecordSetValue_t)
94	(
95	TXTRecordRef *txtRecord,
96	const char *key,
97	uint8_t valueSize,
98	const void *value
99	);
100	typedef uint16_t (DNSSD_STDCALL TXTRecordGetLength_t)(const TXTRecordRef txtRecord);
101	typedef const void * (DNSSD_STDCALL TXTRecordGetBytesPtr_t)(const TXTRecordRef txtRecord);
102
103
104	struct dnssd_s {
105	#ifdef WIN32
106	HMODULE module;
107	#elif USE_LIBDL
108	void *module;
109	#endif
110
111	DNSServiceRegister_t DNSServiceRegister;
112	DNSServiceRefDeallocate_t DNSServiceRefDeallocate;
113	TXTRecordCreate_t TXTRecordCreate;
114	TXTRecordSetValue_t TXTRecordSetValue;
115	TXTRecordGetLength_t TXTRecordGetLength;
116	TXTRecordGetBytesPtr_t TXTRecordGetBytesPtr;
117	TXTRecordDeallocate_t TXTRecordDeallocate;
118
119	DNSServiceRef raopService;
120	DNSServiceRef airplayService;
121	};
122
123
124
125	dnssd_t *
126	dnssd_init(int *error)
127	{
128	dnssd_t *dnssd;
129
130	if (error) *error = DNSSD_ERROR_NOERROR;
131
132	dnssd = calloc(1, sizeof(dnssd_t));
133	if (!dnssd) {
134	if (error) *error = DNSSD_ERROR_OUTOFMEM;
135	return NULL;
136	}
137
138	#ifdef WIN32
139	dnssd->module = LoadLibraryA("dnssd.dll");
140	if (!dnssd->module) {
141	if (error) *error = DNSSD_ERROR_LIBNOTFOUND;
142	free(dnssd);
143	return NULL;
144	}
145	dnssd->DNSServiceRegister = (DNSServiceRegister_t)GetProcAddress(dnssd->module, "DNSServiceRegister");
146	dnssd->DNSServiceRefDeallocate = (DNSServiceRefDeallocate_t)GetProcAddress(dnssd->module, "DNSServiceRefDeallocate");
147	dnssd->TXTRecordCreate = (TXTRecordCreate_t)GetProcAddress(dnssd->module, "TXTRecordCreate");
148	dnssd->TXTRecordSetValue = (TXTRecordSetValue_t)GetProcAddress(dnssd->module, "TXTRecordSetValue");
149	dnssd->TXTRecordGetLength = (TXTRecordGetLength_t)GetProcAddress(dnssd->module, "TXTRecordGetLength");
150	dnssd->TXTRecordGetBytesPtr = (TXTRecordGetBytesPtr_t)GetProcAddress(dnssd->module, "TXTRecordGetBytesPtr");
151	dnssd->TXTRecordDeallocate = (TXTRecordDeallocate_t)GetProcAddress(dnssd->module, "TXTRecordDeallocate");
152
153	if (!dnssd->DNSServiceRegister \|\| !dnssd->DNSServiceRefDeallocate \|\| !dnssd->TXTRecordCreate \|\|
154	!dnssd->TXTRecordSetValue \|\| !dnssd->TXTRecordGetLength \|\| !dnssd->TXTRecordGetBytesPtr \|\|
155	!dnssd->TXTRecordDeallocate) {
156	if (error) *error = DNSSD_ERROR_PROCNOTFOUND;
157	FreeLibrary(dnssd->module);
158	free(dnssd);
159	return NULL;
160	}
161	#elif USE_LIBDL
162	dnssd->module = dlopen("libdns_sd.so", RTLD_LAZY);
163	if (!dnssd->module) {
164	if (error) *error = DNSSD_ERROR_LIBNOTFOUND;
165	free(dnssd);
166	return NULL;
167	}
168	dnssd->DNSServiceRegister = (DNSServiceRegister_t)dlsym(dnssd->module, "DNSServiceRegister");
169	dnssd->DNSServiceRefDeallocate = (DNSServiceRefDeallocate_t)dlsym(dnssd->module, "DNSServiceRefDeallocate");
170	dnssd->TXTRecordCreate = (TXTRecordCreate_t)dlsym(dnssd->module, "TXTRecordCreate");
171	dnssd->TXTRecordSetValue = (TXTRecordSetValue_t)dlsym(dnssd->module, "TXTRecordSetValue");
172	dnssd->TXTRecordGetLength = (TXTRecordGetLength_t)dlsym(dnssd->module, "TXTRecordGetLength");
173	dnssd->TXTRecordGetBytesPtr = (TXTRecordGetBytesPtr_t)dlsym(dnssd->module, "TXTRecordGetBytesPtr");
174	dnssd->TXTRecordDeallocate = (TXTRecordDeallocate_t)dlsym(dnssd->module, "TXTRecordDeallocate");
175
176	if (!dnssd->DNSServiceRegister \|\| !dnssd->DNSServiceRefDeallocate \|\| !dnssd->TXTRecordCreate \|\|
177	!dnssd->TXTRecordSetValue \|\| !dnssd->TXTRecordGetLength \|\| !dnssd->TXTRecordGetBytesPtr \|\|
178	!dnssd->TXTRecordDeallocate) {
179	if (error) *error = DNSSD_ERROR_PROCNOTFOUND;
180	dlclose(dnssd->module);
181	free(dnssd);
182	return NULL;
183	}
184	#else
185	dnssd->DNSServiceRegister = &DNSServiceRegister;
186	dnssd->DNSServiceRefDeallocate = &DNSServiceRefDeallocate;
187	dnssd->TXTRecordCreate = &TXTRecordCreate;
188	dnssd->TXTRecordSetValue = &TXTRecordSetValue;
189	dnssd->TXTRecordGetLength = &TXTRecordGetLength;
190	dnssd->TXTRecordGetBytesPtr = &TXTRecordGetBytesPtr;
191	dnssd->TXTRecordDeallocate = &TXTRecordDeallocate;
192	#endif
193
194	return dnssd;
195	}
196
197	void
198	dnssd_destroy(dnssd_t *dnssd)
199	{
200	if (dnssd) {
201	#ifdef WIN32
202	FreeLibrary(dnssd->module);
203	#elif USE_LIBDL
204	dlclose(dnssd->module);
205	#endif
206	free(dnssd);
207	}
208	}
209
210	int
211	dnssd_register_raop(dnssd_t dnssd, const char name, unsigned short port, const char *hwaddr, int hwaddrlen, int password)
212	{
213	TXTRecordRef txtRecord;
214	char servname[MAX_SERVNAME];
215	int ret;
216
217	assert(dnssd);
218	assert(name);
219	assert(hwaddr);
220
221	dnssd->TXTRecordCreate(&txtRecord, 0, NULL);
222	dnssd->TXTRecordSetValue(&txtRecord, "txtvers", strlen(RAOP_TXTVERS), RAOP_TXTVERS);
223	dnssd->TXTRecordSetValue(&txtRecord, "ch", strlen(RAOP_CH), RAOP_CH);
224	dnssd->TXTRecordSetValue(&txtRecord, "cn", strlen(RAOP_CN), RAOP_CN);
225	dnssd->TXTRecordSetValue(&txtRecord, "et", strlen(RAOP_ET), RAOP_ET);
226	dnssd->TXTRecordSetValue(&txtRecord, "sv", strlen(RAOP_SV), RAOP_SV);
227	dnssd->TXTRecordSetValue(&txtRecord, "da", strlen(RAOP_DA), RAOP_DA);
228	dnssd->TXTRecordSetValue(&txtRecord, "sr", strlen(RAOP_SR), RAOP_SR);
229	dnssd->TXTRecordSetValue(&txtRecord, "ss", strlen(RAOP_SS), RAOP_SS);
230	if (password) {
231	dnssd->TXTRecordSetValue(&txtRecord, "pw", strlen("true"), "true");
232	} else {
233	dnssd->TXTRecordSetValue(&txtRecord, "pw", strlen("false"), "false");
234	}
235	dnssd->TXTRecordSetValue(&txtRecord, "vn", strlen(RAOP_VN), RAOP_VN);
236	dnssd->TXTRecordSetValue(&txtRecord, "tp", strlen(RAOP_TP), RAOP_TP);
237	dnssd->TXTRecordSetValue(&txtRecord, "md", strlen(RAOP_MD), RAOP_MD);
238	dnssd->TXTRecordSetValue(&txtRecord, "vs", strlen(GLOBAL_VERSION), GLOBAL_VERSION);
239	dnssd->TXTRecordSetValue(&txtRecord, "sm", strlen(RAOP_SM), RAOP_SM);
240	dnssd->TXTRecordSetValue(&txtRecord, "ek", strlen(RAOP_EK), RAOP_EK);
241
242	/* Convert hardware address to string */
243	ret = utils_hwaddr_raop(servname, sizeof(servname), hwaddr, hwaddrlen);
244	if (ret < 0) {
245	/* FIXME: handle better */
246	return -1;
247	}
248
249	/* Check that we have bytes for 'hw@name' format */
250	if (sizeof(servname) < strlen(servname)+1+strlen(name)+1) {
251	/* FIXME: handle better */
252	return -2;
253	}
254
255	strncat(servname, "@", sizeof(servname)-strlen(servname)-1);
256	strncat(servname, name, sizeof(servname)-strlen(servname)-1);
257
258	/* Register the service */
259	dnssd->DNSServiceRegister(&dnssd->raopService, 0, 0,
260	servname, "_raop._tcp",
261	NULL, NULL,
262	htons(port),
263	dnssd->TXTRecordGetLength(&txtRecord),
264	dnssd->TXTRecordGetBytesPtr(&txtRecord),
265	NULL, NULL);
266
267	/* Deallocate TXT record */
268	dnssd->TXTRecordDeallocate(&txtRecord);
269	return 1;
270	}
271
272	int
273	dnssd_register_airplay(dnssd_t dnssd, const char name, unsigned short port, const char *hwaddr, int hwaddrlen)
274	{
275	TXTRecordRef txtRecord;
276	char deviceid[3*MAX_HWADDR_LEN];
277	char features[16];
278	int ret;
279
280	assert(dnssd);
281	assert(name);
282	assert(hwaddr);
283
284	/* Convert hardware address to string */
285	ret = utils_hwaddr_airplay(deviceid, sizeof(deviceid), hwaddr, hwaddrlen);
286	if (ret < 0) {
287	/* FIXME: handle better */
288	return -1;
289	}
290
291	features[sizeof(features)-1] = '\0';
292	snprintf(features, sizeof(features)-1, "0x%x", GLOBAL_FEATURES);
293
294	dnssd->TXTRecordCreate(&txtRecord, 0, NULL);
295	dnssd->TXTRecordSetValue(&txtRecord, "deviceid", strlen(deviceid), deviceid);
296	dnssd->TXTRecordSetValue(&txtRecord, "features", strlen(features), features);
297	dnssd->TXTRecordSetValue(&txtRecord, "model", strlen(GLOBAL_MODEL), GLOBAL_MODEL);
298
299	/* Register the service */
300	dnssd->DNSServiceRegister(&dnssd->airplayService, 0, 0,
301	name, "_airplay._tcp",
302	NULL, NULL,
303	htons(port),
304	dnssd->TXTRecordGetLength(&txtRecord),
305	dnssd->TXTRecordGetBytesPtr(&txtRecord),
306	NULL, NULL);
307
308	/* Deallocate TXT record */
309	dnssd->TXTRecordDeallocate(&txtRecord);
310	return 0;
311	}
312
313	void
314	dnssd_unregister_raop(dnssd_t *dnssd)
315	{
316	assert(dnssd);
317
318	if (!dnssd->raopService) {
319	return;
320	}
321
322	dnssd->DNSServiceRefDeallocate(dnssd->raopService);
323	dnssd->raopService = NULL;
324	}
325
326	void
327	dnssd_unregister_airplay(dnssd_t *dnssd)
328	{
329	assert(dnssd);
330
331	if (!dnssd->airplayService) {
332	return;
333	}
334
335	dnssd->DNSServiceRefDeallocate(dnssd->airplayService);
336	dnssd->airplayService = NULL;
337	}