libcoap 4.3.0
address.c
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1/* address.c -- representation of network addresses
2 *
3 * Copyright (C) 2015-2016,2019 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
11#include "coap3/coap_internal.h"
12
13#if !defined(WITH_CONTIKI) && !defined(WITH_LWIP)
14#ifdef HAVE_ARPA_INET_H
15#include <arpa/inet.h>
16#endif
17#ifdef HAVE_NETINET_IN_H
18#include <netinet/in.h>
19#endif
20#ifdef HAVE_SYS_SOCKET_H
21#include <sys/socket.h>
22#endif
23#ifdef HAVE_WS2TCPIP_H
24#include <ws2tcpip.h>
25#endif
26
27#ifdef RIOT_VERSION
28/* FIXME */
29#define IN_MULTICAST(Address) (0)
30#endif /* RIOT_VERSION */
31
32uint16_t
34 assert(addr != NULL);
35 switch (addr->addr.sa.sa_family) {
36 case AF_INET: return ntohs(addr->addr.sin.sin_port);
37 case AF_INET6: return ntohs(addr->addr.sin6.sin6_port);
38 default: /* undefined */
39 ;
40 }
41 return 0;
42}
43
44void
46 assert(addr != NULL);
47 switch (addr->addr.sa.sa_family) {
48 case AF_INET:
49 addr->addr.sin.sin_port = htons(port);
50 break;
51 case AF_INET6:
52 addr->addr.sin6.sin6_port = htons(port);
53 break;
54 default: /* undefined */
55 ;
56 }
57}
58
59int
61 assert(a); assert(b);
62
63 if (a->size != b->size || a->addr.sa.sa_family != b->addr.sa.sa_family)
64 return 0;
65
66 /* need to compare only relevant parts of sockaddr_in6 */
67 switch (a->addr.sa.sa_family) {
68 case AF_INET:
69 return
70 a->addr.sin.sin_port == b->addr.sin.sin_port &&
71 memcmp(&a->addr.sin.sin_addr, &b->addr.sin.sin_addr,
72 sizeof(struct in_addr)) == 0;
73 case AF_INET6:
74 return a->addr.sin6.sin6_port == b->addr.sin6.sin6_port &&
75 memcmp(&a->addr.sin6.sin6_addr, &b->addr.sin6.sin6_addr,
76 sizeof(struct in6_addr)) == 0;
77 default: /* fall through and signal error */
78 ;
79 }
80 return 0;
81}
82
84 if (!a)
85 return 0;
86
87 switch (a->addr.sa.sa_family) {
88 case AF_INET:
89 return IN_MULTICAST(ntohl(a->addr.sin.sin_addr.s_addr));
90 case AF_INET6:
91 return IN6_IS_ADDR_MULTICAST(&a->addr.sin6.sin6_addr) ||
92 (IN6_IS_ADDR_V4MAPPED(&a->addr.sin6.sin6_addr) &&
93 IN_MULTICAST(ntohl(a->addr.sin6.sin6_addr.s6_addr[12])));
94 default: /* fall through and signal error */
95 ;
96 }
97 return 0;
98}
99
100#endif /* !defined(WITH_CONTIKI) && !defined(WITH_LWIP) */
101
103 assert(addr);
104 memset(addr, 0, sizeof(coap_address_t));
105#if !defined(WITH_LWIP) && !defined(WITH_CONTIKI)
106 /* lwip and Contiki have constant address sizes and don't need the .size part */
107 addr->size = sizeof(addr->addr);
108#endif
109}
110
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: address.c:45
void coap_address_init(coap_address_t *addr)
Resets the given coap_address_t object addr to its default values.
Definition: address.c:102
int coap_is_mcast(const coap_address_t *a)
Checks if given address a denotes a multicast address.
Definition: address.c:83
uint16_t coap_address_get_port(const coap_address_t *addr)
Returns the port from addr in host byte order.
Definition: address.c:33
int coap_address_equals(const coap_address_t *a, const coap_address_t *b)
Compares given address objects a and b.
Definition: address.c:60
Pulls together all the internal only header files.
multi-purpose address abstraction
Definition: address.h:96
socklen_t size
size of addr
Definition: address.h:97
struct sockaddr_in sin
Definition: address.h:100
struct sockaddr_in6 sin6
Definition: address.h:101
struct sockaddr sa
Definition: address.h:99
union coap_address_t::@0 addr