src/lib/dnssd.m

   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
  17 #include "dnssd.h"
  18 #include "dnssdint.h"
  19 #include "global.h"
  20 #include "utils.h"
  21
  22 #import <Foundation/Foundation.h>
  23
  24 #define MAX_SERVNAME 256
  25
  26 struct dnssd_s {
  27         NSNetService *raopService;
  28         NSNetService *airplayService;
  29 };
  30
  31 dnssd_t *
  32 dnssd_init(int *error)
  33 {
  34         dnssd_t *dnssd;
  35
  36         if (error) *error = DNSSD_ERROR_NOERROR;
  37
  38         dnssd = calloc(1, sizeof(dnssd_t));
  39         if (!dnssd) {
  40                 if (error) *error = DNSSD_ERROR_OUTOFMEM;
  41                 return NULL;
  42         }
  43         return dnssd;
  44 }
  45
  46 void
  47 dnssd_destroy(dnssd_t *dnssd)
  48 {
  49         free(dnssd);
  50 }
  51
  52 int
  53 dnssd_register_raop(dnssd_t *dnssd, const char *name, unsigned short port, const char *hwaddr, int hwaddrlen, int password)
  54 {
  55         char hwaddrstr[MAX_SERVNAME];
  56         NSString *serviceString;
  57         NSMutableDictionary *txtDict;
  58         NSData *txtData;
  59         int ret;
  60
  61         assert(dnssd);
  62
  63         if (dnssd->raopService != nil) {
  64                 return -1;
  65         }
  66
  67         /* Convert the hardware address to string */
  68         ret = utils_hwaddr_raop(hwaddrstr, sizeof(hwaddrstr), hwaddr, hwaddrlen);
  69         if (ret < 0) {
  70                 return -2;
  71         }
  72         serviceString = [NSString stringWithFormat:@"%s@%s", hwaddrstr, name];
  73
  74         txtDict = [NSMutableDictionary dictionaryWithCapacity:0];
  75         [txtDict setValue:[NSString stringWithUTF8String:RAOP_TXTVERS] forKey:@"txtvers"];
  76         [txtDict setValue:[NSString stringWithUTF8String:RAOP_CH] forKey:@"ch"];
  77         [txtDict setValue:[NSString stringWithUTF8String:RAOP_CN] forKey:@"cn"];
  78         [txtDict setValue:[NSString stringWithUTF8String:RAOP_ET] forKey:@"et"];
  79         [txtDict setValue:[NSString stringWithUTF8String:RAOP_SV] forKey:@"sv"];
  80         [txtDict setValue:[NSString stringWithUTF8String:RAOP_DA] forKey:@"da"];
  81         [txtDict setValue:[NSString stringWithUTF8String:RAOP_SR] forKey:@"sr"];
  82         [txtDict setValue:[NSString stringWithUTF8String:RAOP_SS] forKey:@"ss"];
  83         if (password) {
  84                 [txtDict setValue:@"true" forKey:@"pw"];
  85         } else {
  86                 [txtDict setValue:@"false" forKey:@"pw"];
  87         }
  88         [txtDict setValue:[NSString stringWithUTF8String:RAOP_VN] forKey:@"vn"];
  89         [txtDict setValue:[NSString stringWithUTF8String:RAOP_TP] forKey:@"tp"];
  90         [txtDict setValue:[NSString stringWithUTF8String:RAOP_MD] forKey:@"md"];
  91         [txtDict setValue:[NSString stringWithUTF8String:GLOBAL_VERSION] forKey:@"vs"];
  92         [txtDict setValue:[NSString stringWithUTF8String:RAOP_AM] forKey:@"am"];
  93         [txtDict setValue:[NSString stringWithUTF8String:RAOP_SF] forKey:@"sf"];
  94         txtData = [NSNetService dataFromTXTRecordDictionary:txtDict];
  95
  96         /* Create the service and publish it */
  97         dnssd->raopService = [[NSNetService alloc] initWithDomain:@""
  98                                                    type:@"_raop._tcp"
  99                                                    name:serviceString
 100                                                    port:port];
 101         [dnssd->raopService setTXTRecordData:txtData];
 102         [dnssd->raopService publish];
 103         return 1;
 104 }
 105
 106 int
 107 dnssd_register_airplay(dnssd_t *dnssd, const char *name, unsigned short port, const char *hwaddr, int hwaddrlen)
 108 {
 109         NSMutableDictionary *txtDict;
 110         NSData *txtData;
 111         char deviceid[3*MAX_HWADDR_LEN];
 112         char features[16];
 113         int ret;
 114
 115         assert(dnssd);
 116
 117         if (dnssd->airplayService != nil) {
 118                 return -1;
 119         }
 120
 121         /* Convert hardware address to string */
 122         ret = utils_hwaddr_airplay(deviceid, sizeof(deviceid), hwaddr, hwaddrlen);
 123         if (ret < 0) {
 124                 return -2;
 125         }
 126
 127         memset(features, 0, sizeof(features));
 128         snprintf(features, sizeof(features)-1, "0x%x", GLOBAL_FEATURES);
 129
 130         txtDict = [NSMutableDictionary dictionaryWithCapacity:0];
 131         [txtDict setValue:[NSString stringWithUTF8String:deviceid] forKey:@"deviceid"];
 132         [txtDict setValue:[NSString stringWithUTF8String:features] forKey:@"features"];
 133         [txtDict setValue:[NSString stringWithUTF8String:GLOBAL_MODEL] forKey:@"model"];
 134         txtData = [NSNetService dataFromTXTRecordDictionary:txtDict];
 135
 136         /* Create the service and publish it */
 137         dnssd->airplayService = [[NSNetService alloc] initWithDomain:@""
 138                                                    type:@"_airplay._tcp"
 139                                                    name:[NSString stringWithUTF8String:name]
 140                                                    port:port];
 141         [dnssd->airplayService setTXTRecordData:txtData];
 142         [dnssd->airplayService publish];
 143         return 1;
 144 }
 145
 146 void
 147 dnssd_unregister_raop(dnssd_t *dnssd)
 148 {
 149         assert(dnssd);
 150
 151         if (dnssd->raopService == nil) {
 152                 return;
 153         }
 154
 155         [dnssd->raopService stop];
 156         [dnssd->raopService release];
 157         dnssd->raopService = nil;
 158 }
 159
 160 void
 161 dnssd_unregister_airplay(dnssd_t *dnssd)
 162 {
 163         assert(dnssd);
 164
 165         if (dnssd->airplayService == nil) {
 166                 return;
 167         }
 168
 169         [dnssd->airplayService stop];
 170         [dnssd->airplayService release];
 171         dnssd->airplayService = nil;
 172 }