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)
  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         [txtDict setValue:[NSString stringWithUTF8String:RAOP_PW] forKey:@"pw"];
  84         [txtDict setValue:[NSString stringWithUTF8String:RAOP_VN] forKey:@"vn"];
  85         [txtDict setValue:[NSString stringWithUTF8String:RAOP_TP] forKey:@"tp"];
  86         [txtDict setValue:[NSString stringWithUTF8String:RAOP_MD] forKey:@"md"];
  87         [txtDict setValue:[NSString stringWithUTF8String:GLOBAL_VERSION] forKey:@"vs"];
  88         [txtDict setValue:[NSString stringWithUTF8String:RAOP_AM] forKey:@"am"];
  89         [txtDict setValue:[NSString stringWithUTF8String:RAOP_SF] forKey:@"sf"];
  90         txtData = [NSNetService dataFromTXTRecordDictionary:txtDict];
  91
  92         /* Create the service and publish it */
  93         dnssd->raopService = [[NSNetService alloc] initWithDomain:@""
  94                                                    type:@"_raop._tcp"
  95                                                    name:serviceString
  96                                                    port:port];
  97         [dnssd->raopService setTXTRecordData:txtData];
  98         [dnssd->raopService publish];
  99         return 1;
 100 }
 101
 102 int
 103 dnssd_register_airplay(dnssd_t *dnssd, const char *name, unsigned short port, const char *hwaddr, int hwaddrlen)
 104 {
 105         NSMutableDictionary *txtDict;
 106         NSData *txtData;
 107         char deviceid[3*MAX_HWADDR_LEN];
 108         char features[16];
 109         int ret;
 110
 111         assert(dnssd);
 112
 113         if (dnssd->airplayService != nil) {
 114                 return -1;
 115         }
 116
 117         /* Convert hardware address to string */
 118         ret = utils_hwaddr_airplay(deviceid, sizeof(deviceid), hwaddr, hwaddrlen);
 119         if (ret < 0) {
 120                 return -2;
 121         }
 122
 123         memset(features, 0, sizeof(features));
 124         snprintf(features, sizeof(features)-1, "0x%x", GLOBAL_FEATURES);
 125
 126         txtDict = [NSMutableDictionary dictionaryWithCapacity:0];
 127         [txtDict setValue:[NSString stringWithUTF8String:deviceid] forKey:@"deviceid"];
 128         [txtDict setValue:[NSString stringWithUTF8String:features] forKey:@"features"];
 129         [txtDict setValue:[NSString stringWithUTF8String:GLOBAL_MODEL] forKey:@"model"];
 130         txtData = [NSNetService dataFromTXTRecordDictionary:txtDict];
 131
 132         /* Create the service and publish it */
 133         dnssd->airplayService = [[NSNetService alloc] initWithDomain:@""
 134                                                    type:@"_airplay._tcp"
 135                                                    name:[NSString stringWithUTF8String:name]
 136                                                    port:port];
 137         [dnssd->airplayService setTXTRecordData:txtData];
 138         [dnssd->airplayService publish];
 139         return 1;
 140 }
 141
 142 void
 143 dnssd_unregister_raop(dnssd_t *dnssd)
 144 {
 145         assert(dnssd);
 146
 147         if (dnssd->raopService == nil) {
 148                 return;
 149         }
 150
 151         [dnssd->raopService stop];
 152         [dnssd->raopService release];
 153         dnssd->raopService = nil;
 154 }
 155
 156 void
 157 dnssd_unregister_airplay(dnssd_t *dnssd)
 158 {
 159         assert(dnssd);
 160
 161         if (dnssd->airplayService == nil) {
 162                 return;
 163         }
 164
 165         [dnssd->airplayService stop];
 166         [dnssd->airplayService release];
 167         dnssd->airplayService = nil;
 168 }