fixing #3610
[oweals/gnunet.git] / src / hello / address.c
1 /*
2      This file is part of GNUnet.
3      (C) 2009 Christian Grothoff (and other contributing authors)
4
5      GNUnet is free software; you can redistribute it and/or modify
6      it under the terms of the GNU General Public License as published
7      by the Free Software Foundation; either version 3, or (at your
8      option) any later version.
9
10      GNUnet is distributed in the hope that it will be useful, but
11      WITHOUT ANY WARRANTY; without even the implied warranty of
12      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13      General Public License for more details.
14
15      You should have received a copy of the GNU General Public License
16      along with GNUnet; see the file COPYING.  If not, write to the
17      Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18      Boston, MA 02111-1307, USA.
19 */
20
21 /**
22  * @file hello/address.c
23  * @brief helper functions for handling addresses
24  * @author Christian Grothoff
25  */
26 #include "platform.h"
27 #include "gnunet_hello_lib.h"
28 #include "gnunet_util_lib.h"
29
30
31 /**
32  * Check if an address has a local option set
33  *
34  * @param address the address to check
35  * @param option the respective option to check for
36  * @return GNUNET_YES or GNUNET_NO
37  */
38 int
39 GNUNET_HELLO_address_check_option (const struct GNUNET_HELLO_Address * address,
40     enum GNUNET_HELLO_AddressInfo option)
41 {
42   if (option == (address->local_info & option))
43     return GNUNET_YES;
44   return GNUNET_NO;
45 }
46
47 /**
48  * Get the size of an address struct.
49  *
50  * @param address address
51  * @return the size
52  */
53 size_t
54 GNUNET_HELLO_address_get_size (const struct GNUNET_HELLO_Address * address)
55 {
56   return sizeof (struct GNUNET_HELLO_Address) + address->address_length +
57         strlen (address->transport_name) + 1;
58 }
59
60
61 /**
62  * Allocate an address struct.
63  *
64  * @param peer the peer
65  * @param transport_name plugin name
66  * @param address binary address
67  * @param address_length number of bytes in 'address'
68  * @param local_info additional local information for the address
69  * @return the address struct
70  */
71 struct GNUNET_HELLO_Address *
72 GNUNET_HELLO_address_allocate (const struct GNUNET_PeerIdentity *peer,
73                                const char *transport_name, const void *address,
74                                size_t address_length,
75                                enum GNUNET_HELLO_AddressInfo local_info)
76 {
77   struct GNUNET_HELLO_Address *addr;
78   size_t slen;
79   char *end;
80
81   GNUNET_assert (transport_name != NULL);
82
83   slen = strlen (transport_name) + 1;
84   addr =
85       GNUNET_malloc (sizeof (struct GNUNET_HELLO_Address) + address_length +
86                      slen);
87   addr->peer = *peer;
88   addr->address = &addr[1];
89   end = (char *) &addr[1];
90   memcpy (end, address, address_length);
91   addr->address_length = address_length;
92   addr->transport_name = &end[address_length];
93   addr->local_info = local_info;
94   memcpy (&end[address_length], transport_name, slen);
95   return addr;
96 }
97
98
99 /**
100  * Copy an address struct.
101  *
102  * @param address address to copy
103  * @return a copy of the address struct
104  */
105 struct GNUNET_HELLO_Address *
106 GNUNET_HELLO_address_copy (const struct GNUNET_HELLO_Address *address)
107 {
108   return GNUNET_HELLO_address_allocate (&address->peer, address->transport_name,
109                                         address->address,
110                                         address->address_length,
111                                         address->local_info);
112 }
113
114
115 /**
116  * Compare two addresses.  Does NOT compare the peer identity,
117  * that is assumed already to match!
118  *
119  * @param a1 first address
120  * @param a2 second address
121  * @return 0 if the addresses are equal, -1 if a1<a2, 1 if a1>a2.
122  */
123 int
124 GNUNET_HELLO_address_cmp (const struct GNUNET_HELLO_Address *a1,
125                           const struct GNUNET_HELLO_Address *a2)
126 {
127   int ret;
128
129   ret = strcmp (a1->transport_name, a2->transport_name);
130   if (0 != ret)
131     return ret;
132   if (a1->address_length < a2->address_length)
133     return -1;
134   if (a1->address_length > a2->address_length)
135     return 1;
136   return memcmp (a1->address, a2->address, a1->address_length);
137 }
138
139
140 /* end of address.c */