Simon Cooksey / mbed-os

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features/netsocket/SocketAddress.cpp@0:fb7af294d5d9, 2016-11-17 (annotated)

Committer:
Simon Cooksey
Date:
Thu Nov 17 16:43:53 2016 +0000
Revision:
0:fb7af294d5d9
Initial commit

Who changed what in which revision?

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Simon Cooksey 0:fb7af294d5d9 1 /* Socket
Simon Cooksey 0:fb7af294d5d9 2 * Copyright (c) 2015 ARM Limited
Simon Cooksey 0:fb7af294d5d9 3 *
Simon Cooksey 0:fb7af294d5d9 4 * Licensed under the Apache License, Version 2.0 (the "License");
Simon Cooksey 0:fb7af294d5d9 5 * you may not use this file except in compliance with the License.
Simon Cooksey 0:fb7af294d5d9 6 * You may obtain a copy of the License at
Simon Cooksey 0:fb7af294d5d9 7 *
Simon Cooksey 0:fb7af294d5d9 8 * http://www.apache.org/licenses/LICENSE-2.0
Simon Cooksey 0:fb7af294d5d9 9 *
Simon Cooksey 0:fb7af294d5d9 10 * Unless required by applicable law or agreed to in writing, software
Simon Cooksey 0:fb7af294d5d9 11 * distributed under the License is distributed on an "AS IS" BASIS,
Simon Cooksey 0:fb7af294d5d9 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
Simon Cooksey 0:fb7af294d5d9 13 * See the License for the specific language governing permissions and
Simon Cooksey 0:fb7af294d5d9 14 * limitations under the License.
Simon Cooksey 0:fb7af294d5d9 15 */
Simon Cooksey 0:fb7af294d5d9 16
Simon Cooksey 0:fb7af294d5d9 17 #include "SocketAddress.h"
Simon Cooksey 0:fb7af294d5d9 18 #include "NetworkInterface.h"
Simon Cooksey 0:fb7af294d5d9 19 #include "NetworkStack.h"
Simon Cooksey 0:fb7af294d5d9 20 #include <string.h>
Simon Cooksey 0:fb7af294d5d9 21 #include "mbed.h"
Simon Cooksey 0:fb7af294d5d9 22
Simon Cooksey 0:fb7af294d5d9 23
Simon Cooksey 0:fb7af294d5d9 24 static bool ipv4_is_valid(const char *addr)
Simon Cooksey 0:fb7af294d5d9 25 {
Simon Cooksey 0:fb7af294d5d9 26 int i = 0;
Simon Cooksey 0:fb7af294d5d9 27
Simon Cooksey 0:fb7af294d5d9 28 // Check each digit for [0-9.]
Simon Cooksey 0:fb7af294d5d9 29 for (; addr[i]; i++) {
Simon Cooksey 0:fb7af294d5d9 30 if (!(addr[i] >= '0' && addr[i] <= '9') && addr[i] != '.') {
Simon Cooksey 0:fb7af294d5d9 31 return false;
Simon Cooksey 0:fb7af294d5d9 32 }
Simon Cooksey 0:fb7af294d5d9 33 }
Simon Cooksey 0:fb7af294d5d9 34
Simon Cooksey 0:fb7af294d5d9 35 // Ending with '.' garuntees host
Simon Cooksey 0:fb7af294d5d9 36 if (i > 0 && addr[i-1] == '.') {
Simon Cooksey 0:fb7af294d5d9 37 return false;
Simon Cooksey 0:fb7af294d5d9 38 }
Simon Cooksey 0:fb7af294d5d9 39
Simon Cooksey 0:fb7af294d5d9 40 return true;
Simon Cooksey 0:fb7af294d5d9 41 }
Simon Cooksey 0:fb7af294d5d9 42
Simon Cooksey 0:fb7af294d5d9 43 static bool ipv6_is_valid(const char *addr)
Simon Cooksey 0:fb7af294d5d9 44 {
Simon Cooksey 0:fb7af294d5d9 45 // Check each digit for [0-9a-fA-F:]
Simon Cooksey 0:fb7af294d5d9 46 // Must also have at least 2 colons
Simon Cooksey 0:fb7af294d5d9 47 int colons = 0;
Simon Cooksey 0:fb7af294d5d9 48 for (int i = 0; addr[i]; i++) {
Simon Cooksey 0:fb7af294d5d9 49 if (!(addr[i] >= '0' && addr[i] <= '9') &&
Simon Cooksey 0:fb7af294d5d9 50 !(addr[i] >= 'a' && addr[i] <= 'f') &&
Simon Cooksey 0:fb7af294d5d9 51 !(addr[i] >= 'A' && addr[i] <= 'F') &&
Simon Cooksey 0:fb7af294d5d9 52 addr[i] != ':') {
Simon Cooksey 0:fb7af294d5d9 53 return false;
Simon Cooksey 0:fb7af294d5d9 54 }
Simon Cooksey 0:fb7af294d5d9 55 if (addr[i] == ':') {
Simon Cooksey 0:fb7af294d5d9 56 colons++;
Simon Cooksey 0:fb7af294d5d9 57 }
Simon Cooksey 0:fb7af294d5d9 58 }
Simon Cooksey 0:fb7af294d5d9 59
Simon Cooksey 0:fb7af294d5d9 60 return colons >= 2;
Simon Cooksey 0:fb7af294d5d9 61 }
Simon Cooksey 0:fb7af294d5d9 62
Simon Cooksey 0:fb7af294d5d9 63 static void ipv4_from_address(uint8_t *bytes, const char *addr)
Simon Cooksey 0:fb7af294d5d9 64 {
Simon Cooksey 0:fb7af294d5d9 65 int count = 0;
Simon Cooksey 0:fb7af294d5d9 66 int i = 0;
Simon Cooksey 0:fb7af294d5d9 67
Simon Cooksey 0:fb7af294d5d9 68 for (; count < NSAPI_IPv4_BYTES; count++) {
Simon Cooksey 0:fb7af294d5d9 69 unsigned char b;
Simon Cooksey 0:fb7af294d5d9 70 int scanned = sscanf(&addr[i], "%hhu", &b);
Simon Cooksey 0:fb7af294d5d9 71 if (scanned < 1) {
Simon Cooksey 0:fb7af294d5d9 72 return;
Simon Cooksey 0:fb7af294d5d9 73 }
Simon Cooksey 0:fb7af294d5d9 74
Simon Cooksey 0:fb7af294d5d9 75 bytes[count] = b;
Simon Cooksey 0:fb7af294d5d9 76
Simon Cooksey 0:fb7af294d5d9 77 for (; addr[i] != '.'; i++) {
Simon Cooksey 0:fb7af294d5d9 78 if (!addr[i]) {
Simon Cooksey 0:fb7af294d5d9 79 return;
Simon Cooksey 0:fb7af294d5d9 80 }
Simon Cooksey 0:fb7af294d5d9 81 }
Simon Cooksey 0:fb7af294d5d9 82
Simon Cooksey 0:fb7af294d5d9 83 i++;
Simon Cooksey 0:fb7af294d5d9 84 }
Simon Cooksey 0:fb7af294d5d9 85 }
Simon Cooksey 0:fb7af294d5d9 86
Simon Cooksey 0:fb7af294d5d9 87 static int ipv6_scan_chunk(uint16_t *shorts, const char *chunk) {
Simon Cooksey 0:fb7af294d5d9 88 int count = 0;
Simon Cooksey 0:fb7af294d5d9 89 int i = 0;
Simon Cooksey 0:fb7af294d5d9 90
Simon Cooksey 0:fb7af294d5d9 91 for (; count < NSAPI_IPv6_BYTES/2; count++) {
Simon Cooksey 0:fb7af294d5d9 92 unsigned short s;
Simon Cooksey 0:fb7af294d5d9 93 int scanned = sscanf(&chunk[i], "%hx", &s);
Simon Cooksey 0:fb7af294d5d9 94 if (scanned < 1) {
Simon Cooksey 0:fb7af294d5d9 95 return count;
Simon Cooksey 0:fb7af294d5d9 96 }
Simon Cooksey 0:fb7af294d5d9 97
Simon Cooksey 0:fb7af294d5d9 98 shorts[count] = s;
Simon Cooksey 0:fb7af294d5d9 99
Simon Cooksey 0:fb7af294d5d9 100 for (; chunk[i] != ':'; i++) {
Simon Cooksey 0:fb7af294d5d9 101 if (!chunk[i]) {
Simon Cooksey 0:fb7af294d5d9 102 return count+1;
Simon Cooksey 0:fb7af294d5d9 103 }
Simon Cooksey 0:fb7af294d5d9 104 }
Simon Cooksey 0:fb7af294d5d9 105
Simon Cooksey 0:fb7af294d5d9 106 i++;
Simon Cooksey 0:fb7af294d5d9 107 }
Simon Cooksey 0:fb7af294d5d9 108
Simon Cooksey 0:fb7af294d5d9 109 return count;
Simon Cooksey 0:fb7af294d5d9 110 }
Simon Cooksey 0:fb7af294d5d9 111
Simon Cooksey 0:fb7af294d5d9 112 static void ipv6_from_address(uint8_t *bytes, const char *addr)
Simon Cooksey 0:fb7af294d5d9 113 {
Simon Cooksey 0:fb7af294d5d9 114 // Start with zeroed address
Simon Cooksey 0:fb7af294d5d9 115 uint16_t shorts[NSAPI_IPv6_BYTES/2];
Simon Cooksey 0:fb7af294d5d9 116 int suffix = 0;
Simon Cooksey 0:fb7af294d5d9 117
Simon Cooksey 0:fb7af294d5d9 118 // Find double colons and scan suffix
Simon Cooksey 0:fb7af294d5d9 119 for (int i = 0; addr[i]; i++) {
Simon Cooksey 0:fb7af294d5d9 120 if (addr[i] == ':' && addr[i+1] == ':') {
Simon Cooksey 0:fb7af294d5d9 121 suffix = ipv6_scan_chunk(shorts, &addr[i+2]);
Simon Cooksey 0:fb7af294d5d9 122 break;
Simon Cooksey 0:fb7af294d5d9 123 }
Simon Cooksey 0:fb7af294d5d9 124 }
Simon Cooksey 0:fb7af294d5d9 125
Simon Cooksey 0:fb7af294d5d9 126 // Move suffix to end
Simon Cooksey 0:fb7af294d5d9 127 memmove(&shorts[NSAPI_IPv6_BYTES/2-suffix], &shorts[0],
Simon Cooksey 0:fb7af294d5d9 128 suffix*sizeof(uint16_t));
Simon Cooksey 0:fb7af294d5d9 129 memset(&shorts[0], 0,
Simon Cooksey 0:fb7af294d5d9 130 (NSAPI_IPv6_BYTES/2-suffix)*sizeof(uint16_t));
Simon Cooksey 0:fb7af294d5d9 131
Simon Cooksey 0:fb7af294d5d9 132 // Scan prefix
Simon Cooksey 0:fb7af294d5d9 133 ipv6_scan_chunk(shorts, &addr[0]);
Simon Cooksey 0:fb7af294d5d9 134
Simon Cooksey 0:fb7af294d5d9 135 // Flip bytes
Simon Cooksey 0:fb7af294d5d9 136 for (int i = 0; i < NSAPI_IPv6_BYTES/2; i++) {
Simon Cooksey 0:fb7af294d5d9 137 bytes[2*i+0] = (uint8_t)(shorts[i] >> 8);
Simon Cooksey 0:fb7af294d5d9 138 bytes[2*i+1] = (uint8_t)(shorts[i] >> 0);
Simon Cooksey 0:fb7af294d5d9 139 }
Simon Cooksey 0:fb7af294d5d9 140 }
Simon Cooksey 0:fb7af294d5d9 141
Simon Cooksey 0:fb7af294d5d9 142 static void ipv4_to_address(char *addr, const uint8_t *bytes)
Simon Cooksey 0:fb7af294d5d9 143 {
Simon Cooksey 0:fb7af294d5d9 144 sprintf(addr, "%d.%d.%d.%d", bytes[0], bytes[1], bytes[2], bytes[3]);
Simon Cooksey 0:fb7af294d5d9 145 }
Simon Cooksey 0:fb7af294d5d9 146
Simon Cooksey 0:fb7af294d5d9 147 static void ipv6_to_address(char *addr, const uint8_t *bytes)
Simon Cooksey 0:fb7af294d5d9 148 {
Simon Cooksey 0:fb7af294d5d9 149 for (int i = 0; i < NSAPI_IPv6_BYTES/2; i++) {
Simon Cooksey 0:fb7af294d5d9 150 sprintf(&addr[5*i], "%02x%02x", bytes[2*i], bytes[2*i+1]);
Simon Cooksey 0:fb7af294d5d9 151 addr[5*i+4] = ':';
Simon Cooksey 0:fb7af294d5d9 152 }
Simon Cooksey 0:fb7af294d5d9 153 addr[NSAPI_IPv6_SIZE-1] = '\0';
Simon Cooksey 0:fb7af294d5d9 154 }
Simon Cooksey 0:fb7af294d5d9 155
Simon Cooksey 0:fb7af294d5d9 156
Simon Cooksey 0:fb7af294d5d9 157 SocketAddress::SocketAddress(nsapi_addr_t addr, uint16_t port)
Simon Cooksey 0:fb7af294d5d9 158 {
Simon Cooksey 0:fb7af294d5d9 159 _ip_address[0] = '\0';
Simon Cooksey 0:fb7af294d5d9 160 set_addr(addr);
Simon Cooksey 0:fb7af294d5d9 161 set_port(port);
Simon Cooksey 0:fb7af294d5d9 162 }
Simon Cooksey 0:fb7af294d5d9 163
Simon Cooksey 0:fb7af294d5d9 164 SocketAddress::SocketAddress(const char *addr, uint16_t port)
Simon Cooksey 0:fb7af294d5d9 165 {
Simon Cooksey 0:fb7af294d5d9 166 _ip_address[0] = '\0';
Simon Cooksey 0:fb7af294d5d9 167 set_ip_address(addr);
Simon Cooksey 0:fb7af294d5d9 168 set_port(port);
Simon Cooksey 0:fb7af294d5d9 169 }
Simon Cooksey 0:fb7af294d5d9 170
Simon Cooksey 0:fb7af294d5d9 171 SocketAddress::SocketAddress(const void *bytes, nsapi_version_t version, uint16_t port)
Simon Cooksey 0:fb7af294d5d9 172 {
Simon Cooksey 0:fb7af294d5d9 173 _ip_address[0] = '\0';
Simon Cooksey 0:fb7af294d5d9 174 set_ip_bytes(bytes, version);
Simon Cooksey 0:fb7af294d5d9 175 set_port(port);
Simon Cooksey 0:fb7af294d5d9 176 }
Simon Cooksey 0:fb7af294d5d9 177
Simon Cooksey 0:fb7af294d5d9 178 SocketAddress::SocketAddress(const SocketAddress &addr)
Simon Cooksey 0:fb7af294d5d9 179 {
Simon Cooksey 0:fb7af294d5d9 180 _ip_address[0] = '\0';
Simon Cooksey 0:fb7af294d5d9 181 set_addr(addr.get_addr());
Simon Cooksey 0:fb7af294d5d9 182 set_port(addr.get_port());
Simon Cooksey 0:fb7af294d5d9 183 }
Simon Cooksey 0:fb7af294d5d9 184
Simon Cooksey 0:fb7af294d5d9 185 bool SocketAddress::set_ip_address(const char *addr)
Simon Cooksey 0:fb7af294d5d9 186 {
Simon Cooksey 0:fb7af294d5d9 187 _ip_address[0] = '\0';
Simon Cooksey 0:fb7af294d5d9 188
Simon Cooksey 0:fb7af294d5d9 189 if (addr && ipv4_is_valid(addr)) {
Simon Cooksey 0:fb7af294d5d9 190 _addr.version = NSAPI_IPv4;
Simon Cooksey 0:fb7af294d5d9 191 ipv4_from_address(_addr.bytes, addr);
Simon Cooksey 0:fb7af294d5d9 192 return true;
Simon Cooksey 0:fb7af294d5d9 193 } else if (addr && ipv6_is_valid(addr)) {
Simon Cooksey 0:fb7af294d5d9 194 _addr.version = NSAPI_IPv6;
Simon Cooksey 0:fb7af294d5d9 195 ipv6_from_address(_addr.bytes, addr);
Simon Cooksey 0:fb7af294d5d9 196 return true;
Simon Cooksey 0:fb7af294d5d9 197 } else {
Simon Cooksey 0:fb7af294d5d9 198 _addr = nsapi_addr_t();
Simon Cooksey 0:fb7af294d5d9 199 return false;
Simon Cooksey 0:fb7af294d5d9 200 }
Simon Cooksey 0:fb7af294d5d9 201 }
Simon Cooksey 0:fb7af294d5d9 202
Simon Cooksey 0:fb7af294d5d9 203 void SocketAddress::set_ip_bytes(const void *bytes, nsapi_version_t version)
Simon Cooksey 0:fb7af294d5d9 204 {
Simon Cooksey 0:fb7af294d5d9 205 nsapi_addr_t addr;
Simon Cooksey 0:fb7af294d5d9 206 addr.version = version;
Simon Cooksey 0:fb7af294d5d9 207 memcpy(addr.bytes, bytes, NSAPI_IP_BYTES);
Simon Cooksey 0:fb7af294d5d9 208 set_addr(addr);
Simon Cooksey 0:fb7af294d5d9 209 }
Simon Cooksey 0:fb7af294d5d9 210
Simon Cooksey 0:fb7af294d5d9 211 void SocketAddress::set_addr(nsapi_addr_t addr)
Simon Cooksey 0:fb7af294d5d9 212 {
Simon Cooksey 0:fb7af294d5d9 213 _ip_address[0] = '\0';
Simon Cooksey 0:fb7af294d5d9 214 _addr = addr;
Simon Cooksey 0:fb7af294d5d9 215 }
Simon Cooksey 0:fb7af294d5d9 216
Simon Cooksey 0:fb7af294d5d9 217 void SocketAddress::set_port(uint16_t port)
Simon Cooksey 0:fb7af294d5d9 218 {
Simon Cooksey 0:fb7af294d5d9 219 _port = port;
Simon Cooksey 0:fb7af294d5d9 220 }
Simon Cooksey 0:fb7af294d5d9 221
Simon Cooksey 0:fb7af294d5d9 222 const char *SocketAddress::get_ip_address() const
Simon Cooksey 0:fb7af294d5d9 223 {
Simon Cooksey 0:fb7af294d5d9 224 if (_addr.version == NSAPI_UNSPEC) {
Simon Cooksey 0:fb7af294d5d9 225 return NULL;
Simon Cooksey 0:fb7af294d5d9 226 }
Simon Cooksey 0:fb7af294d5d9 227
Simon Cooksey 0:fb7af294d5d9 228 if (!_ip_address[0]) {
Simon Cooksey 0:fb7af294d5d9 229 if (_addr.version == NSAPI_IPv4) {
Simon Cooksey 0:fb7af294d5d9 230 ipv4_to_address(_ip_address, _addr.bytes);
Simon Cooksey 0:fb7af294d5d9 231 } else if (_addr.version == NSAPI_IPv6) {
Simon Cooksey 0:fb7af294d5d9 232 ipv6_to_address(_ip_address, _addr.bytes);
Simon Cooksey 0:fb7af294d5d9 233 }
Simon Cooksey 0:fb7af294d5d9 234 }
Simon Cooksey 0:fb7af294d5d9 235
Simon Cooksey 0:fb7af294d5d9 236 return _ip_address;
Simon Cooksey 0:fb7af294d5d9 237 }
Simon Cooksey 0:fb7af294d5d9 238
Simon Cooksey 0:fb7af294d5d9 239 const void *SocketAddress::get_ip_bytes() const
Simon Cooksey 0:fb7af294d5d9 240 {
Simon Cooksey 0:fb7af294d5d9 241 return _addr.bytes;
Simon Cooksey 0:fb7af294d5d9 242 }
Simon Cooksey 0:fb7af294d5d9 243
Simon Cooksey 0:fb7af294d5d9 244 nsapi_version_t SocketAddress::get_ip_version() const
Simon Cooksey 0:fb7af294d5d9 245 {
Simon Cooksey 0:fb7af294d5d9 246 return _addr.version;
Simon Cooksey 0:fb7af294d5d9 247 }
Simon Cooksey 0:fb7af294d5d9 248
Simon Cooksey 0:fb7af294d5d9 249 nsapi_addr_t SocketAddress::get_addr() const
Simon Cooksey 0:fb7af294d5d9 250 {
Simon Cooksey 0:fb7af294d5d9 251 return _addr;
Simon Cooksey 0:fb7af294d5d9 252 }
Simon Cooksey 0:fb7af294d5d9 253
Simon Cooksey 0:fb7af294d5d9 254 uint16_t SocketAddress::get_port() const
Simon Cooksey 0:fb7af294d5d9 255 {
Simon Cooksey 0:fb7af294d5d9 256 return _port;
Simon Cooksey 0:fb7af294d5d9 257 }
Simon Cooksey 0:fb7af294d5d9 258
Simon Cooksey 0:fb7af294d5d9 259 SocketAddress::operator bool() const
Simon Cooksey 0:fb7af294d5d9 260 {
Simon Cooksey 0:fb7af294d5d9 261 if (_addr.version == NSAPI_IPv4) {
Simon Cooksey 0:fb7af294d5d9 262 for (int i = 0; i < NSAPI_IPv4_BYTES; i++) {
Simon Cooksey 0:fb7af294d5d9 263 if (_addr.bytes[i]) {
Simon Cooksey 0:fb7af294d5d9 264 return true;
Simon Cooksey 0:fb7af294d5d9 265 }
Simon Cooksey 0:fb7af294d5d9 266 }
Simon Cooksey 0:fb7af294d5d9 267
Simon Cooksey 0:fb7af294d5d9 268 return false;
Simon Cooksey 0:fb7af294d5d9 269 } else if (_addr.version == NSAPI_IPv6) {
Simon Cooksey 0:fb7af294d5d9 270 for (int i = 0; i < NSAPI_IPv6_BYTES; i++) {
Simon Cooksey 0:fb7af294d5d9 271 if (_addr.bytes[i]) {
Simon Cooksey 0:fb7af294d5d9 272 return true;
Simon Cooksey 0:fb7af294d5d9 273 }
Simon Cooksey 0:fb7af294d5d9 274 }
Simon Cooksey 0:fb7af294d5d9 275
Simon Cooksey 0:fb7af294d5d9 276 return false;
Simon Cooksey 0:fb7af294d5d9 277 } else {
Simon Cooksey 0:fb7af294d5d9 278 return false;
Simon Cooksey 0:fb7af294d5d9 279 }
Simon Cooksey 0:fb7af294d5d9 280 }
Simon Cooksey 0:fb7af294d5d9 281
Simon Cooksey 0:fb7af294d5d9 282 bool operator==(const SocketAddress &a, const SocketAddress &b)
Simon Cooksey 0:fb7af294d5d9 283 {
Simon Cooksey 0:fb7af294d5d9 284 if (!a && !b) {
Simon Cooksey 0:fb7af294d5d9 285 return true;
Simon Cooksey 0:fb7af294d5d9 286 } else if (a._addr.version != b._addr.version) {
Simon Cooksey 0:fb7af294d5d9 287 return false;
Simon Cooksey 0:fb7af294d5d9 288 } else if (a._addr.version == NSAPI_IPv4) {
Simon Cooksey 0:fb7af294d5d9 289 return memcmp(a._addr.bytes, b._addr.bytes, NSAPI_IPv4_BYTES) == 0;
Simon Cooksey 0:fb7af294d5d9 290 } else if (a._addr.version == NSAPI_IPv6) {
Simon Cooksey 0:fb7af294d5d9 291 return memcmp(a._addr.bytes, b._addr.bytes, NSAPI_IPv6_BYTES) == 0;
Simon Cooksey 0:fb7af294d5d9 292 }
Simon Cooksey 0:fb7af294d5d9 293 }
Simon Cooksey 0:fb7af294d5d9 294
Simon Cooksey 0:fb7af294d5d9 295 bool operator!=(const SocketAddress &a, const SocketAddress &b)
Simon Cooksey 0:fb7af294d5d9 296 {
Simon Cooksey 0:fb7af294d5d9 297 return !(a == b);
Simon Cooksey 0:fb7af294d5d9 298 }
Simon Cooksey 0:fb7af294d5d9 299
Simon Cooksey 0:fb7af294d5d9 300 void SocketAddress::_SocketAddress(NetworkStack *iface, const char *host, uint16_t port)
Simon Cooksey 0:fb7af294d5d9 301 {
Simon Cooksey 0:fb7af294d5d9 302 _ip_address[0] = '\0';
Simon Cooksey 0:fb7af294d5d9 303
Simon Cooksey 0:fb7af294d5d9 304 // gethostbyname must check for literals, so can call it directly
Simon Cooksey 0:fb7af294d5d9 305 int err = iface->gethostbyname(host, this);
Simon Cooksey 0:fb7af294d5d9 306 _port = port;
Simon Cooksey 0:fb7af294d5d9 307 if (err) {
Simon Cooksey 0:fb7af294d5d9 308 _addr = nsapi_addr_t();
Simon Cooksey 0:fb7af294d5d9 309 _port = 0;
Simon Cooksey 0:fb7af294d5d9 310 }
Simon Cooksey 0:fb7af294d5d9 311 }