1 /*
2 * ngtcp2
3 *
4 * Copyright (c) 2019 ngtcp2 contributors
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining
7 * a copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sublicense, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be
15 * included in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
20 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 */
25 #include "ngtcp2_addr.h"
26
27 #include <string.h>
28 #include <assert.h>
29
30 #ifdef WIN32
31 # include <winsock2.h>
32 # include <ws2tcpip.h>
33 #else
34 # include <sys/types.h>
35 # include <sys/socket.h>
36 # include <netinet/in.h>
37 # include <netinet/ip.h>
38 # include <netinet/tcp.h>
39 # include <arpa/inet.h>
40 #endif
41
ngtcp2_addr_init(ngtcp2_addr * dest,const struct sockaddr * addr,size_t addrlen)42 ngtcp2_addr *ngtcp2_addr_init(ngtcp2_addr *dest, const struct sockaddr *addr,
43 size_t addrlen) {
44 dest->addrlen = addrlen;
45 dest->addr = (struct sockaddr *)addr;
46 return dest;
47 }
48
ngtcp2_addr_copy(ngtcp2_addr * dest,const ngtcp2_addr * src)49 void ngtcp2_addr_copy(ngtcp2_addr *dest, const ngtcp2_addr *src) {
50 dest->addrlen = src->addrlen;
51 if (src->addrlen) {
52 memcpy(dest->addr, src->addr, src->addrlen);
53 }
54 }
55
ngtcp2_addr_copy_byte(ngtcp2_addr * dest,const struct sockaddr * addr,size_t addrlen)56 void ngtcp2_addr_copy_byte(ngtcp2_addr *dest, const struct sockaddr *addr,
57 size_t addrlen) {
58 dest->addrlen = addrlen;
59 if (addrlen) {
60 memcpy(dest->addr, addr, addrlen);
61 }
62 }
63
sockaddr_eq(const struct sockaddr * a,const struct sockaddr * b)64 static int sockaddr_eq(const struct sockaddr *a, const struct sockaddr *b) {
65 assert(a->sa_family == b->sa_family);
66
67 switch (a->sa_family) {
68 case AF_INET: {
69 const struct sockaddr_in *ai = (const struct sockaddr_in *)(void *)a,
70 *bi = (const struct sockaddr_in *)(void *)b;
71 return ai->sin_port == bi->sin_port &&
72 memcmp(&ai->sin_addr, &bi->sin_addr, sizeof(ai->sin_addr)) == 0;
73 }
74 case AF_INET6: {
75 const struct sockaddr_in6 *ai = (const struct sockaddr_in6 *)(void *)a,
76 *bi = (const struct sockaddr_in6 *)(void *)b;
77 return ai->sin6_port == bi->sin6_port &&
78 memcmp(&ai->sin6_addr, &bi->sin6_addr, sizeof(ai->sin6_addr)) == 0;
79 }
80 default:
81 assert(0);
82 abort();
83 }
84 }
85
ngtcp2_addr_eq(const ngtcp2_addr * a,const ngtcp2_addr * b)86 int ngtcp2_addr_eq(const ngtcp2_addr *a, const ngtcp2_addr *b) {
87 return a->addr->sa_family == b->addr->sa_family &&
88 sockaddr_eq(a->addr, b->addr);
89 }
90
ngtcp2_addr_compare(const ngtcp2_addr * aa,const ngtcp2_addr * bb)91 uint32_t ngtcp2_addr_compare(const ngtcp2_addr *aa, const ngtcp2_addr *bb) {
92 uint32_t flags = NGTCP2_ADDR_COMPARE_FLAG_NONE;
93 const struct sockaddr *a = aa->addr;
94 const struct sockaddr *b = bb->addr;
95
96 if (a->sa_family != b->sa_family) {
97 return NGTCP2_ADDR_COMPARE_FLAG_FAMILY;
98 }
99
100 switch (a->sa_family) {
101 case AF_INET: {
102 const struct sockaddr_in *ai = (const struct sockaddr_in *)(void *)a,
103 *bi = (const struct sockaddr_in *)(void *)b;
104 if (memcmp(&ai->sin_addr, &bi->sin_addr, sizeof(ai->sin_addr))) {
105 flags |= NGTCP2_ADDR_COMPARE_FLAG_ADDR;
106 }
107 if (ai->sin_port != bi->sin_port) {
108 flags |= NGTCP2_ADDR_COMPARE_FLAG_PORT;
109 }
110 return flags;
111 }
112 case AF_INET6: {
113 const struct sockaddr_in6 *ai = (const struct sockaddr_in6 *)(void *)a,
114 *bi = (const struct sockaddr_in6 *)(void *)b;
115 if (memcmp(&ai->sin6_addr, &bi->sin6_addr, sizeof(ai->sin6_addr))) {
116 flags |= NGTCP2_ADDR_COMPARE_FLAG_ADDR;
117 }
118 if (ai->sin6_port != bi->sin6_port) {
119 flags |= NGTCP2_ADDR_COMPARE_FLAG_PORT;
120 }
121 return flags;
122 }
123 default:
124 assert(0);
125 abort();
126 }
127 }
128
ngtcp2_addr_empty(const ngtcp2_addr * addr)129 int ngtcp2_addr_empty(const ngtcp2_addr *addr) { return addr->addrlen == 0; }
130