libcoap  4.3.1
coap_address.c
Go to the documentation of this file.
1 /* coap_address.c -- representation of network addresses
2  *
3  * Copyright (C) 2015-2016,2019-2022 Olaf Bergmann <bergmann@tzi.org>
4  *
5  * SPDX-License-Identifier: BSD-2-Clause
6  *
7  * This file is part of the CoAP library libcoap. Please see
8  * README for terms of use.
9  */
10 
16 #include "coap3/coap_internal.h"
17 
18 #if !defined(WITH_CONTIKI) && !defined(WITH_LWIP)
19 #ifdef HAVE_ARPA_INET_H
20 #include <arpa/inet.h>
21 #endif
22 #ifdef HAVE_NETINET_IN_H
23 #include <netinet/in.h>
24 #endif
25 #ifdef HAVE_SYS_SOCKET_H
26 #include <sys/socket.h>
27 #endif
28 #ifdef HAVE_WS2TCPIP_H
29 #include <ws2tcpip.h>
30 #endif
31 
32 #ifdef RIOT_VERSION
33 /* FIXME */
34 #define IN_MULTICAST(Address) (0)
35 #endif /* RIOT_VERSION */
36 
37 uint16_t
39  assert(addr != NULL);
40  switch (addr->addr.sa.sa_family) {
41  case AF_INET: return ntohs(addr->addr.sin.sin_port);
42  case AF_INET6: return ntohs(addr->addr.sin6.sin6_port);
43  default: /* undefined */
44  ;
45  }
46  return 0;
47 }
48 
49 void
50 coap_address_set_port(coap_address_t *addr, uint16_t port) {
51  assert(addr != NULL);
52  switch (addr->addr.sa.sa_family) {
53  case AF_INET:
54  addr->addr.sin.sin_port = htons(port);
55  break;
56  case AF_INET6:
57  addr->addr.sin6.sin6_port = htons(port);
58  break;
59  default: /* undefined */
60  ;
61  }
62 }
63 
64 int
66  assert(a); assert(b);
67 
68  if (a->size != b->size || a->addr.sa.sa_family != b->addr.sa.sa_family)
69  return 0;
70 
71  /* need to compare only relevant parts of sockaddr_in6 */
72  switch (a->addr.sa.sa_family) {
73  case AF_INET:
74  return
75  a->addr.sin.sin_port == b->addr.sin.sin_port &&
76  memcmp(&a->addr.sin.sin_addr, &b->addr.sin.sin_addr,
77  sizeof(struct in_addr)) == 0;
78  case AF_INET6:
79  return a->addr.sin6.sin6_port == b->addr.sin6.sin6_port &&
80  memcmp(&a->addr.sin6.sin6_addr, &b->addr.sin6.sin6_addr,
81  sizeof(struct in6_addr)) == 0;
82  default: /* fall through and signal error */
83  ;
84  }
85  return 0;
86 }
87 
89  if (!a)
90  return 0;
91 
92  switch (a->addr.sa.sa_family) {
93  case AF_INET:
94  return IN_MULTICAST(ntohl(a->addr.sin.sin_addr.s_addr));
95  case AF_INET6:
96  return IN6_IS_ADDR_MULTICAST(&a->addr.sin6.sin6_addr) ||
97  (IN6_IS_ADDR_V4MAPPED(&a->addr.sin6.sin6_addr) &&
98  IN_MULTICAST(ntohl(a->addr.sin6.sin6_addr.s6_addr[12])));
99  default: /* fall through and signal error */
100  ;
101  }
102  return 0;
103 }
104 
105 #endif /* !defined(WITH_CONTIKI) && !defined(WITH_LWIP) */
106 
108  assert(addr);
109  memset(addr, 0, sizeof(coap_address_t));
110 #if !defined(WITH_LWIP) && !defined(WITH_CONTIKI)
111  /* lwip and Contiki have constant address sizes and don't need the .size part */
112  addr->size = sizeof(addr->addr);
113 #endif
114 }
115 
void coap_address_set_port(coap_address_t *addr, uint16_t port)
Set the port field of addr to port (in host byte order).
Definition: coap_address.c:50
void coap_address_init(coap_address_t *addr)
Resets the given coap_address_t object addr to its default values.
Definition: coap_address.c:107
int coap_is_mcast(const coap_address_t *a)
Checks if given address a denotes a multicast address.
Definition: coap_address.c:88
uint16_t coap_address_get_port(const coap_address_t *addr)
Returns the port from addr in host byte order.
Definition: coap_address.c:38
int coap_address_equals(const coap_address_t *a, const coap_address_t *b)
Compares given address objects a and b.
Definition: coap_address.c:65
Pulls together all the internal only header files.
multi-purpose address abstraction
Definition: coap_address.h:96
socklen_t size
size of addr
Definition: coap_address.h:97
struct sockaddr_in sin
Definition: coap_address.h:100
struct sockaddr_in6 sin6
Definition: coap_address.h:101
struct sockaddr sa
Definition: coap_address.h:99
union coap_address_t::@0 addr