aboutsummaryrefslogtreecommitdiff
path: root/src/hello/address.c
blob: c48699f99cfdb0e7b6ff18cfc153f5938a9aff2f (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
/*
     This file is part of GNUnet.
     Copyright (C) 2009 GNUnet e.V.

     GNUnet is free software: you can redistribute it and/or modify it
     under the terms of the GNU Affero General Public License as published
     by the Free Software Foundation, either version 3 of the License,
     or (at your option) any later version.

     GNUnet is distributed in the hope that it will be useful, but
     WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     Affero General Public License for more details.
*/

/**
 * @file hello/address.c
 * @brief helper functions for handling addresses
 * @author Christian Grothoff
 */
#include "platform.h"
#include "gnunet_hello_lib.h"
#include "gnunet_util_lib.h"


/**
 * Check if an address has a local option set
 *
 * @param address the address to check
 * @param option the respective option to check for
 * @return #GNUNET_YES or #GNUNET_NO
 */
int
GNUNET_HELLO_address_check_option (const struct GNUNET_HELLO_Address * address,
                                   enum GNUNET_HELLO_AddressInfo option)
{
  if (option == (address->local_info & option))
    return GNUNET_YES;
  return GNUNET_NO;
}


/**
 * Get the size of an address struct.
 *
 * @param address address
 * @return the size
 */
size_t
GNUNET_HELLO_address_get_size (const struct GNUNET_HELLO_Address * address)
{
  return sizeof (struct GNUNET_HELLO_Address) + address->address_length +
    strlen (address->transport_name) + 1;
}


/**
 * Allocate an address struct.
 *
 * @param peer the peer
 * @param transport_name plugin name
 * @param address binary address
 * @param address_length number of bytes in 'address'
 * @param local_info additional local information for the address
 * @return the address struct
 */
struct GNUNET_HELLO_Address *
GNUNET_HELLO_address_allocate (const struct GNUNET_PeerIdentity *peer,
                               const char *transport_name,
                               const void *address,
                               size_t address_length,
                               enum GNUNET_HELLO_AddressInfo local_info)
{
  struct GNUNET_HELLO_Address *addr;
  size_t slen;
  char *end;

  slen = strlen (transport_name) + 1;
  addr = GNUNET_malloc (sizeof (struct GNUNET_HELLO_Address) +
                        address_length + slen);
  addr->peer = *peer;
  addr->address = &addr[1];
  addr->address_length = address_length;
  addr->local_info = local_info;
  end = (char *) &addr[1];
  addr->transport_name = &end[address_length];
  GNUNET_memcpy (end,
          address,
          address_length);
  GNUNET_memcpy (&end[address_length],
          transport_name,
          slen);
  return addr;
}


/**
 * Copy an address struct.
 *
 * @param address address to copy
 * @return a copy of the address struct
 */
struct GNUNET_HELLO_Address *
GNUNET_HELLO_address_copy (const struct GNUNET_HELLO_Address *address)
{
  if (NULL == address)
    return NULL;
  return GNUNET_HELLO_address_allocate (&address->peer,
                                        address->transport_name,
                                        address->address,
                                        address->address_length,
                                        address->local_info);
}


/**
 * Compare two addresses.  Does NOT compare the peer identity,
 * that is assumed already to match!
 *
 * @param a1 first address
 * @param a2 second address
 * @return 0 if the addresses are equal, -1 if a1<a2, 1 if a1>a2.
 */
int
GNUNET_HELLO_address_cmp (const struct GNUNET_HELLO_Address *a1,
                          const struct GNUNET_HELLO_Address *a2)
{
  int ret;

  if ( (NULL == a1) &&
       (NULL == a2) )
    return 0;
  if (NULL == a1)
    return 1;
  if (NULL == a2)
    return -1;
  ret = strcmp (a1->transport_name, a2->transport_name);
  if (0 != ret)
    return ret;
  if (a1->local_info != a2->local_info)
    return (((int) a1->local_info) < ((int) a2->local_info)) ? -1 : 1;
  if (a1->address_length < a2->address_length)
    return -1;
  if (a1->address_length > a2->address_length)
    return 1;
  return memcmp (a1->address,
                 a2->address,
                 a1->address_length);
}


/* end of address.c */