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/*
* Dynamic wrapper for Bonjour SDK for Windows.
*
* Copyright © 2020-2024 by OpenPrinting.
* Copyright 2018 by Apple Inc.
*
* Licensed under Apache License v2.0. See the file "LICENSE" for more
* information.
*/
//#include <cups/http-private.h>
#include <cups/thread-private.h>
#include "dns_sd.h"
/*
* Pointers for functions...
*/
static int dnssd_initialized = 0;
static _cups_mutex_t dnssd_mutex = _CUPS_MUTEX_INITIALIZER;
static DNSServiceErrorType (*dnssd_add_record)(DNSServiceRef sdRef, DNSRecordRef *RecordRef, DNSServiceFlags flags, uint16_t rrtype, uint16_t rdlen, const void *rdata, uint32_t ttl);
static DNSServiceErrorType (*dnssd_browse)(DNSServiceRef *sdRef, DNSServiceFlags flags, uint32_t interfaceIndex, const char *regtype, const char *domain, DNSServiceBrowseReply callBack, void *context);
static DNSServiceErrorType (*dnssd_construct_full_name)(char * const fullName, const char * const service, const char * const regtype, const char * const domain);
static DNSServiceErrorType (*dnssd_create_connection)(DNSServiceRef *sdRef);
static DNSServiceErrorType (*dnssd_process_result)(DNSServiceRef sdRef);
static DNSServiceErrorType (*dnssd_query_record)(DNSServiceRef *sdRef, DNSServiceFlags flags, uint32_t interfaceIndex, const char *fullname, uint16_t rrtype, uint16_t rrclass, DNSServiceQueryRecordReply callBack, void *context);
static void (*dnssd_deallocate)(DNSServiceRef sdRef);
static int (*dnssd_sock_fd)(DNSServiceRef sdRef);
static DNSServiceErrorType (*dnssd_register)(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);
static DNSServiceErrorType (*dnssd_remove_record)(DNSServiceRef sdRef, DNSRecordRef RecordRef, DNSServiceFlags flags);
static DNSServiceErrorType (*dnssd_resolve)(DNSServiceRef *sdRef, DNSServiceFlags flags, uint32_t interfaceIndex, const char *name, const char *regtype, const char *domain, DNSServiceResolveReply callBack, void *context);
static DNSServiceErrorType (*dnssd_update_record)(DNSServiceRef sdRef, DNSRecordRef RecordRef, DNSServiceFlags flags, uint16_t rdlen, const void *rdata, uint32_t ttl);
static void (*dnssd_txt_create)(TXTRecordRef *txtRecord, uint16_t bufferLen, void *buffer);
static void (*dnssd_txt_deallocate)(TXTRecordRef *txtRecord);
static const void *(*dnssd_txt_get_bytes_ptr)(const TXTRecordRef *txtRecord);
static uint16_t (*dnssd_txt_get_count)(uint16_t txtLen, const void *txtRecord);
static uint16_t (*dnssd_txt_get_length)(const TXTRecordRef *txtRecord);
static DNSServiceErrorType (*dnssd_txt_get_item_at_index)(uint16_t txtLen, const void *txtRecord, uint16_t itemIndex, uint16_t keyBufLen, char *key, uint8_t *valueLen, const void **value);
static const void *(*dnssd_txt_get_value_ptr)(uint16_t txtLen, const void *txtRecord, const char *key, uint8_t *valueLen);
static DNSServiceErrorType (*dnssd_txt_set_value)(TXTRecordRef *txtRecord, const char *key, uint8_t valueSize, const void *value);
/*
* Function to initialize pointers...
*/
static void
dnssd_init(void)
{
_cupsMutexLock(&dnssd_mutex);
if (!dnssd_initialized)
{
HINSTANCE dll_handle = LoadLibraryA("dnssd.dll");
if (dll_handle)
{
dnssd_add_record = (DNSServiceErrorType (*)(DNSServiceRef, DNSRecordRef *, DNSServiceFlags, uint16_t, uint16_t, const void *, uint32_t))GetProcAddress(dll_handle, "DNSServiceAddRecord");
dnssd_browse = (DNSServiceErrorType(*)(DNSServiceRef *, DNSServiceFlags, uint32_t, const char *, const char *, DNSServiceBrowseReply, void *))GetProcAddress(dll_handle, "DNSServiceBrowse");
dnssd_construct_full_name = (DNSServiceErrorType(*)(char * const, const char * const, const char * const, const char * const))GetProcAddress(dll_handle, "DNSServiceConstructFullName");
dnssd_create_connection = (DNSServiceErrorType(*)(DNSServiceRef *))GetProcAddress(dll_handle, "DNSServiceCreateConnection");
dnssd_deallocate = (DNSServiceErrorType(*)(DNSServiceRef))GetProcAddress(dll_handle, "DNSServiceRefDeallocate");
dnssd_process_result = (DNSServiceErrorType(*)(DNSServiceRef))GetProcAddress(dll_handle, "DNSServiceProcessResult");
dnssd_query_record = (DNSServiceErrorType(*)(DNSServiceRef *, DNSServiceFlags, uint32_t, const char *, uint16_t, uint16_t, DNSServiceQueryRecordReply, void *))GetProcAddress(dll_handle, "DNSServiceQueryRecord");
dnssd_register = (DNSServiceErrorType(*)(DNSServiceRef *, DNSServiceFlags, uint32_t, const char *, const char *, const char *, const char *, uint16_t, uint16_t, const void *, DNSServiceRegisterReply, void *))GetProcAddress(dll_handle, "DNSServiceRegister");
dnssd_remove_record = (DNSServiceErrorType(*)(DNSServiceRef, DNSRecordRef, DNSServiceFlags))GetProcAddress(dll_handle, "DNSServiceRemoveRecord");
dnssd_resolve = (DNSServiceErrorType(*)(DNSServiceRef *, DNSServiceFlags, uint32_t, const char *, const char *, const char *, DNSServiceResolveReply, void *))GetProcAddress(dll_handle, "DNSServiceResolve");
dnssd_sock_fd = (int(*)(DNSServiceRef))GetProcAddress(dll_handle, "DNSServiceRefSockFD");
dnssd_update_record = (DNSServiceErrorType(*)(DNSServiceRef, DNSRecordRef, DNSServiceFlags, uint16_t, const void *, uint32_t))GetProcAddress(dll_handle, "DNSServiceUpdateRecord");
dnssd_txt_create = (void (*)(TXTRecordRef *, uint16_t, void *))GetProcAddress(dll_handle, "TXTRecordCreate");
dnssd_txt_deallocate = (void (*)(TXTRecordRef *))GetProcAddress(dll_handle, "TXTRecordDeallocate");
dnssd_txt_get_bytes_ptr = (const void *(*)(const TXTRecordRef *))GetProcAddress(dll_handle, "TXTRecordGetBytesPtr");
dnssd_txt_get_count = (uint16_t (*)(uint16_t, const void *))GetProcAddress(dll_handle, "TXTRecordGetCount");
dnssd_txt_get_item_at_index = (DNSServiceErrorType (*)(uint16_t, const void *, uint16_t, uint16_t, char *, uint8_t *, const void **))GetProcAddress(dll_handle, "TXTRecordGetItemAtIndex");
dnssd_txt_get_length = (uint16_t (*)(const TXTRecordRef *))GetProcAddress(dll_handle, "TXTRecordGetLength");
dnssd_txt_get_value_ptr = (const void *(*)(uint16_t, const void *, const char *, uint8_t *))GetProcAddress(dll_handle, "TXTRecordGetValuePtr");
dnssd_txt_set_value = (DNSServiceErrorType (*)(TXTRecordRef *, const char *, uint8_t, const void *))GetProcAddress(dll_handle, "TXTRecordSetValue");
}
dnssd_initialized = 1;
}
_cupsMutexUnlock(&dnssd_mutex);
}
// DNSServiceAddRecord
DNSServiceErrorType DNSSD_API DNSServiceAddRecord
(
DNSServiceRef sdRef,
DNSRecordRef *RecordRef,
DNSServiceFlags flags,
uint16_t rrtype,
uint16_t rdlen,
const void *rdata,
uint32_t ttl
)
{
if (!dnssd_initialized)
dnssd_init();
if (dnssd_add_record)
return (*dnssd_add_record)(sdRef, RecordRef, flags, rrtype, rdlen, rdata, ttl);
else
return (kDNSServiceErr_ServiceNotRunning);
}
// DNSServiceBrowse
DNSServiceErrorType DNSSD_API DNSServiceBrowse
(
DNSServiceRef *sdRef,
DNSServiceFlags flags,
uint32_t interfaceIndex,
const char *regtype,
const char *domain, /* may be NULL */
DNSServiceBrowseReply callBack,
void *context /* may be NULL */
)
{
if (!dnssd_initialized)
dnssd_init();
if (dnssd_browse)
return (*dnssd_browse)(sdRef, flags, interfaceIndex, regtype, domain, callBack, context);
else
return (kDNSServiceErr_ServiceNotRunning);
}
// DNSServiceConstructFullName
DNSServiceErrorType DNSSD_API DNSServiceConstructFullName
(
char * const fullName,
const char * const service, /* may be NULL */
const char * const regtype,
const char * const domain
)
{
if (!dnssd_initialized)
dnssd_init();
if (dnssd_construct_full_name)
return (*dnssd_construct_full_name)(fullName, service, regtype, domain);
else
return (-1);
}
// DNSServiceCreateConnection
DNSServiceErrorType DNSSD_API DNSServiceCreateConnection(DNSServiceRef *sdRef)
{
if (!dnssd_initialized)
dnssd_init();
if (dnssd_create_connection)
return (*dnssd_create_connection)(sdRef);
else
return (kDNSServiceErr_ServiceNotRunning);
}
// DNSServiceProcessResult
DNSServiceErrorType DNSSD_API DNSServiceProcessResult(DNSServiceRef sdRef)
{
if (!dnssd_initialized)
dnssd_init();
if (dnssd_process_result)
return (*dnssd_process_result)(sdRef);
else
return (kDNSServiceErr_ServiceNotRunning);
}
// DNSServiceQueryRecord
DNSServiceErrorType DNSSD_API DNSServiceQueryRecord
(
DNSServiceRef *sdRef,
DNSServiceFlags flags,
uint32_t interfaceIndex,
const char *fullname,
uint16_t rrtype,
uint16_t rrclass,
DNSServiceQueryRecordReply callBack,
void *context /* may be NULL */
)
{
if (!dnssd_initialized)
dnssd_init();
if (dnssd_query_record)
return (*dnssd_query_record)(sdRef, flags, interfaceIndex, fullname, rrtype, rrclass, callBack, context);
else
return (kDNSServiceErr_ServiceNotRunning);
}
// DNSServiceRefDeallocate
void DNSSD_API DNSServiceRefDeallocate(DNSServiceRef sdRef)
{
if (!dnssd_initialized)
dnssd_init();
if (dnssd_deallocate)
(*dnssd_deallocate)(sdRef);
}
// DNSServiceRefSockFD
int DNSSD_API DNSServiceRefSockFD(DNSServiceRef sdRef)
{
if (!dnssd_initialized)
dnssd_init();
if (dnssd_sock_fd)
return (*dnssd_sock_fd)(sdRef);
else
return (kDNSServiceErr_ServiceNotRunning);
}
// DNSServiceRegister
DNSServiceErrorType DNSSD_API DNSServiceRegister
(
DNSServiceRef *sdRef,
DNSServiceFlags flags,
uint32_t interfaceIndex,
const char *name, /* may be NULL */
const char *regtype,
const char *domain, /* may be NULL */
const char *host, /* may be NULL */
uint16_t port, /* In network byte order */
uint16_t txtLen,
const void *txtRecord, /* may be NULL */
DNSServiceRegisterReply callBack, /* may be NULL */
void *context /* may be NULL */
)
{
if (!dnssd_initialized)
dnssd_init();
if (dnssd_register)
return (*dnssd_register)(sdRef, flags, interfaceIndex, name, regtype, domain, host, port, txtLen, txtRecord, callBack, context);
else
return (kDNSServiceErr_ServiceNotRunning);
}
// DNSServiceRemoveRecord
DNSServiceErrorType DNSSD_API DNSServiceRemoveRecord
(
DNSServiceRef sdRef,
DNSRecordRef RecordRef,
DNSServiceFlags flags
)
{
if (!dnssd_initialized)
dnssd_init();
if (dnssd_remove_record)
return (*dnssd_remove_record)(sdRef, RecordRef, flags);
else
return (kDNSServiceErr_ServiceNotRunning);
}
// DNSServiceResolve
DNSServiceErrorType DNSSD_API DNSServiceResolve
(
DNSServiceRef *sdRef,
DNSServiceFlags flags,
uint32_t interfaceIndex,
const char *name,
const char *regtype,
const char *domain,
DNSServiceResolveReply callBack,
void *context /* may be NULL */
)
{
if (!dnssd_initialized)
dnssd_init();
if (dnssd_resolve)
return (*dnssd_resolve)(sdRef, flags, interfaceIndex, name, regtype, domain, callBack, context);
else
return (kDNSServiceErr_ServiceNotRunning);
}
// DNSServiceUpdateRecord
DNSServiceErrorType DNSSD_API DNSServiceUpdateRecord
(
DNSServiceRef sdRef,
DNSRecordRef RecordRef, /* may be NULL */
DNSServiceFlags flags,
uint16_t rdlen,
const void *rdata,
uint32_t ttl
)
{
if (!dnssd_initialized)
dnssd_init();
if (dnssd_update_record)
return (*dnssd_update_record)(sdRef, RecordRef, flags, rdlen, rdata, ttl);
else
return (kDNSServiceErr_ServiceNotRunning);
}
// TXTRecordCreate
void DNSSD_API
TXTRecordCreate(
TXTRecordRef *txtRecord,
uint16_t bufferLen,
void *buffer)
{
if (!dnssd_initialized)
dnssd_init();
if (dnssd_txt_create)
(*dnssd_txt_create)(txtRecord, bufferLen, buffer);
}
// TXTRecordDeallocate
void DNSSD_API TXTRecordDeallocate
(
TXTRecordRef *txtRecord
)
{
if (!dnssd_initialized)
dnssd_init();
if (dnssd_txt_deallocate)
(*dnssd_txt_deallocate)(txtRecord);
}
// TXTRecordGetBytesPtr
const void * DNSSD_API TXTRecordGetBytesPtr
(
const TXTRecordRef *txtRecord
)
{
if (!dnssd_initialized)
dnssd_init();
if (dnssd_txt_get_bytes_ptr)
return (*dnssd_txt_get_bytes_ptr)(txtRecord);
else
return (NULL);
}
// TXTRecordGetLength
uint16_t DNSSD_API TXTRecordGetLength
(
const TXTRecordRef *txtRecord
)
{
if (!dnssd_initialized)
dnssd_init();
if (dnssd_txt_get_length)
return (*dnssd_txt_get_length)(txtRecord);
else
return (0);
}
// TXTRecordSetValue
DNSServiceErrorType DNSSD_API TXTRecordSetValue
(
TXTRecordRef *txtRecord,
const char *key,
uint8_t valueSize, /* may be zero */
const void *value /* may be NULL */
)
{
if (!dnssd_initialized)
dnssd_init();
if (dnssd_txt_set_value)
return (*dnssd_txt_set_value)(txtRecord, key, valueSize, value);
else
return (-1);
}
// TXTRecordGetCount
uint16_t DNSSD_API
TXTRecordGetCount(
uint16_t txtLen,
const void *txtRecord)
{
if (!dnssd_initialized)
dnssd_init();
if (dnssd_txt_get_count)
return (*dnssd_txt_get_count)(txtLen, txtRecord);
else
return (0);
}
// TXTRecordGetItemAtIndex
DNSServiceErrorType DNSSD_API
TXTRecordGetItemAtIndex(
uint16_t txtLen,
const void *txtRecord,
uint16_t itemIndex,
uint16_t keyBufLen,
char *key,
uint8_t *valueLen,
const void **value)
{
if (!dnssd_initialized)
dnssd_init();
if (dnssd_txt_get_item_at_index)
return (*dnssd_txt_get_item_at_index)(txtLen, txtRecord, itemIndex, keyBufLen, key, valueLen, value);
else
return (-1);
}
// TXTRecordGetValuePtr
const void * DNSSD_API
TXTRecordGetValuePtr(
uint16_t txtLen,
const void *txtRecord,
const char *key,
uint8_t *valueLen)
{
if (!dnssd_initialized)
dnssd_init();
if (dnssd_txt_get_value_ptr)
return (*dnssd_txt_get_value_ptr)(txtLen, txtRecord, key, valueLen);
else
return (NULL);
}
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