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1 /***
2   This file is part of avahi.
3 
4   avahi is free software; you can redistribute it and/or modify it
5   under the terms of the GNU Lesser General Public License as
6   published by the Free Software Foundation; either version 2.1 of the
7   License, or (at your option) any later version.
8 
9   avahi is distributed in the hope that it will be useful, but WITHOUT
10   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11   or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
12   Public License for more details.
13 
14   You should have received a copy of the GNU Lesser General Public
15   License along with avahi; if not, write to the Free Software
16   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
17   USA.
18 ***/
19 
20 #ifdef HAVE_CONFIG_H
21 #include <config.h>
22 #endif
23 
24 #include <stdio.h>
25 #include <assert.h>
26 
27 #include <avahi-client/client.h>
28 #include <avahi-client/lookup.h>
29 #include <avahi-common/error.h>
30 #include <avahi-common/simple-watch.h>
31 #include "avahi-common/avahi-malloc.h"
32 
hexdump(const void * p,size_t size)33 static void hexdump(const void* p, size_t size) {
34     const uint8_t *c = p;
35     assert(p);
36 
37     printf("Dumping %lu bytes from %p:\n", (unsigned long) size, p);
38 
39     while (size > 0) {
40         unsigned i;
41 
42         for (i = 0; i < 16; i++) {
43             if (i < size)
44                 printf("%02x ", c[i]);
45             else
46                 printf("   ");
47         }
48 
49         for (i = 0; i < 16; i++) {
50             if (i < size)
51                 printf("%c", c[i] >= 32 && c[i] < 127 ? c[i] : '.');
52             else
53                 printf(" ");
54         }
55 
56         printf("\n");
57 
58         c += 16;
59 
60         if (size <= 16)
61             break;
62 
63         size -= 16;
64     }
65 }
66 
callback(AVAHI_GCC_UNUSED AvahiRecordBrowser * r,AVAHI_GCC_UNUSED AvahiIfIndex interface,AVAHI_GCC_UNUSED AvahiProtocol protocol,AvahiBrowserEvent event,const char * name,uint16_t clazz,uint16_t type,const void * rdata,size_t rdata_size,AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,AVAHI_GCC_UNUSED void * userdata)67 static void callback(
68     AVAHI_GCC_UNUSED AvahiRecordBrowser *r,
69     AVAHI_GCC_UNUSED AvahiIfIndex interface,
70     AVAHI_GCC_UNUSED AvahiProtocol protocol,
71     AvahiBrowserEvent event,
72     const char *name,
73     uint16_t clazz,
74     uint16_t type,
75     const void *rdata,
76     size_t rdata_size,
77     AVAHI_GCC_UNUSED AvahiLookupResultFlags flags,
78     AVAHI_GCC_UNUSED void *userdata) {
79 
80     fprintf(stderr, "%i name=%s class=%u type=%u\n", event, name, clazz, type);
81 
82     if (rdata)
83         hexdump(rdata, rdata_size);
84 }
85 
main(AVAHI_GCC_UNUSED int argc,AVAHI_GCC_UNUSED char * argv[])86 int main(AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char *argv[]) {
87 
88     AvahiSimplePoll *simple_poll;
89     const AvahiPoll *poll_api;
90     AvahiClient *client;
91     AvahiRecordBrowser *r;
92 
93     simple_poll = avahi_simple_poll_new();
94     assert(simple_poll);
95 
96     poll_api = avahi_simple_poll_get(simple_poll);
97     assert(poll_api);
98 
99     client = avahi_client_new(poll_api, 0, NULL, NULL, NULL);
100     assert(client);
101 
102     r = avahi_record_browser_new(client, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, "ecstasy.local", AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_HINFO, 0, callback, simple_poll);
103     assert(r);
104 
105     avahi_simple_poll_loop(simple_poll);
106 
107     avahi_client_free(client);
108     avahi_simple_poll_free(simple_poll);
109 
110     return 0;
111 }
112