1 /* Copyright 2013 The Chromium Authors. All rights reserved.
2 * Use of this source code is governed by a BSD-style license that can be
3 * found in the LICENSE file. */
5 #include "nacl_io/ossocket.h"
6 #if defined(PROVIDES_SOCKET_API) && !defined(__GLIBC__)
13 #include "sdk_util/macros.h"
16 kIpv4AddressSize = sizeof(in_addr_t),
17 kIpv6AddressSize = sizeof(struct in6_addr),
20 /* Helper function for inet_pton() for IPv4 addresses. */
21 static int inet_pton_v4(const char* src, void* dst) {
22 const char* pos = src;
23 uint8_t result[kIpv4AddressSize] = {0};
26 for (i = 0; i < kIpv4AddressSize; ++i) {
27 /* strtol() won't treat whitespace characters in the beginning as an error,
28 * so check to ensure this is started with digit before passing to strtol().
30 if (isspace((int)(*pos)))
33 unsigned long value = strtoul(pos, &end_pos, 10);
34 if (value > 255 || pos == end_pos)
36 result[i] = (unsigned char)value;
39 if (i < (kIpv4AddressSize - 1)) {
47 memcpy(dst, result, sizeof(result));
51 /* Helper function for inet_pton() for IPv6 addresses. */
52 int inet_pton_v6(const char* src, void* dst) {
53 /* strtol() skips 0x in from of a number, while it's not allowed in IPv6
54 * addresses. Check that there is no 'x' in the string. */
55 const char* pos = src;
56 while (*pos != '\0') {
63 uint8_t result[kIpv6AddressSize];
64 memset(&result, 0, sizeof(result));
65 int double_colon_pos = -1;
69 if (*(pos + 1) != ':')
75 while (*pos != '\0') {
76 /* strtol() won't treat whitespace characters in the beginning as an error,
77 * so check to ensure this is started with digit before passing to strtol().
79 if (isspace((int)(*pos)))
82 unsigned long word = strtoul(pos, &end_pos, 16);
83 if (word > 0xffff || pos == end_pos)
86 if (*end_pos == '.') {
87 if (result_pos + kIpv4AddressSize > kIpv6AddressSize)
89 /* Parse rest of address as IPv4 address. */
90 if (!inet_pton_v4(pos, result + result_pos))
96 if (result_pos > kIpv6AddressSize - 2)
98 result[result_pos] = (word & 0xFF00) >> 8;
99 result[result_pos + 1] = word & 0xFF;
102 if (*end_pos == '\0')
110 if (double_colon_pos != -1)
112 double_colon_pos = result_pos;
117 /* Finally move the data to the end in case the address contained '::'. */
118 if (result_pos < kIpv6AddressSize) {
119 if (double_colon_pos == -1)
121 int move_size = result_pos - double_colon_pos;
122 int gap_size = kIpv6AddressSize - result_pos;
123 memmove(result + kIpv6AddressSize - move_size,
124 result + double_colon_pos, move_size);
125 memset(result + double_colon_pos, 0, gap_size);
128 /* Finally copy the result to the output buffer. */
129 memcpy(dst, result, sizeof(result));
134 int inet_pton(int af, const char *src, void *dst) {
139 return inet_pton_v4(src, dst);
140 } else if (af == AF_INET6) {
141 return inet_pton_v6(src, dst);
143 errno = EAFNOSUPPORT;
147 #endif /* defined(PROVIDES_SOCKET_API) && !defined(__GLIBC__) */