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Dependencies:   DS1307 TextLCD mbed

NetServices/services/ntp/NTPClient.cpp@0:f615d151a72c, 2014-12-04 (annotated)

Committer:
Michielber
Date:
Thu Dec 04 10:36:40 2014 +0000
Revision:
0:f615d151a72c
Berckvens Michiel & Basteyns Jonas 4/12/2014

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Michielber 0:f615d151a72c 1 #pragma diag_remark 1293
Michielber 0:f615d151a72c 2 /*
Michielber 0:f615d151a72c 3 Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com)
Michielber 0:f615d151a72c 4
Michielber 0:f615d151a72c 5 Permission is hereby granted, free of charge, to any person obtaining a copy
Michielber 0:f615d151a72c 6 of this software and associated documentation files (the "Software"), to deal
Michielber 0:f615d151a72c 7 in the Software without restriction, including without limitation the rights
Michielber 0:f615d151a72c 8 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
Michielber 0:f615d151a72c 9 copies of the Software, and to permit persons to whom the Software is
Michielber 0:f615d151a72c 10 furnished to do so, subject to the following conditions:
Michielber 0:f615d151a72c 11
Michielber 0:f615d151a72c 12 The above copyright notice and this permission notice shall be included in
Michielber 0:f615d151a72c 13 all copies or substantial portions of the Software.
Michielber 0:f615d151a72c 14
Michielber 0:f615d151a72c 15 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
Michielber 0:f615d151a72c 16 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
Michielber 0:f615d151a72c 17 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
Michielber 0:f615d151a72c 18 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
Michielber 0:f615d151a72c 19 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
Michielber 0:f615d151a72c 20 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
Michielber 0:f615d151a72c 21 THE SOFTWARE.
Michielber 0:f615d151a72c 22 */
Michielber 0:f615d151a72c 23
Michielber 0:f615d151a72c 24 #include "NTPClient.h"
Michielber 0:f615d151a72c 25
Michielber 0:f615d151a72c 26 #include <stdio.h>
Michielber 0:f615d151a72c 27
Michielber 0:f615d151a72c 28 //#define __DEBUG
Michielber 0:f615d151a72c 29 #include "dbg/dbg.h"
Michielber 0:f615d151a72c 30
Michielber 0:f615d151a72c 31 #define NTP_PORT 123
Michielber 0:f615d151a72c 32 #define NTP_CLIENT_PORT 0//50420 //Random port
Michielber 0:f615d151a72c 33 #define NTP_REQUEST_TIMEOUT 15000
Michielber 0:f615d151a72c 34 #define NTP_TIMESTAMP_DELTA 2208988800ull //Diff btw a UNIX timestamp (Starting Jan, 1st 1970) and a NTP timestamp (Starting Jan, 1st 1900)
Michielber 0:f615d151a72c 35
Michielber 0:f615d151a72c 36 #define htons( x ) ( (( x << 8 ) & 0xFF00) | (( x >> 8 ) & 0x00FF) )
Michielber 0:f615d151a72c 37 #define ntohs( x ) (htons(x))
Michielber 0:f615d151a72c 38
Michielber 0:f615d151a72c 39 #define htonl( x ) ( (( x << 24 ) & 0xFF000000) \
Michielber 0:f615d151a72c 40 | (( x << 8 ) & 0x00FF0000) \
Michielber 0:f615d151a72c 41 | (( x >> 8 ) & 0x0000FF00) \
Michielber 0:f615d151a72c 42 | (( x >> 24 ) & 0x000000FF) )
Michielber 0:f615d151a72c 43 #define ntohl( x ) (htonl(x))
Michielber 0:f615d151a72c 44
Michielber 0:f615d151a72c 45 NTPClient::NTPClient() : NetService(false), m_state(NTP_PING), m_pCbItem(NULL), m_pCbMeth(NULL), m_pCb(NULL),
Michielber 0:f615d151a72c 46 m_watchdog(), m_timeout(0), m_closed(true), m_host(), m_pDnsReq(NULL), m_blockingResult(NTP_PROCESSING)
Michielber 0:f615d151a72c 47 {
Michielber 0:f615d151a72c 48 setTimeout(NTP_REQUEST_TIMEOUT);
Michielber 0:f615d151a72c 49 DBG("\r\nNew NTPClient %p\r\n",this);
Michielber 0:f615d151a72c 50 }
Michielber 0:f615d151a72c 51
Michielber 0:f615d151a72c 52 NTPClient::~NTPClient()
Michielber 0:f615d151a72c 53 {
Michielber 0:f615d151a72c 54 close();
Michielber 0:f615d151a72c 55 }
Michielber 0:f615d151a72c 56
Michielber 0:f615d151a72c 57 //High level setup functions
Michielber 0:f615d151a72c 58 NTPResult NTPClient::setTime(const Host& host) //Blocking
Michielber 0:f615d151a72c 59 {
Michielber 0:f615d151a72c 60 doSetTime(host);
Michielber 0:f615d151a72c 61 return blockingProcess();
Michielber 0:f615d151a72c 62 }
Michielber 0:f615d151a72c 63
Michielber 0:f615d151a72c 64 NTPResult NTPClient::setTime(const Host& host, void (*pMethod)(NTPResult)) //Non blocking
Michielber 0:f615d151a72c 65 {
Michielber 0:f615d151a72c 66 setOnResult(pMethod);
Michielber 0:f615d151a72c 67 doSetTime(host);
Michielber 0:f615d151a72c 68 return NTP_PROCESSING;
Michielber 0:f615d151a72c 69 }
Michielber 0:f615d151a72c 70
Michielber 0:f615d151a72c 71 #if 0 //For doc only
Michielber 0:f615d151a72c 72 template<class T>
Michielber 0:f615d151a72c 73 NTPResult NTPClient::setTime(const Host& host, T* pItem, void (T::*pMethod)(NTPResult)) //Non blocking
Michielber 0:f615d151a72c 74 {
Michielber 0:f615d151a72c 75 setOnResult(pItem, pMethod);
Michielber 0:f615d151a72c 76 doSetTime(host);
Michielber 0:f615d151a72c 77 return NTP_PROCESSING;
Michielber 0:f615d151a72c 78 }
Michielber 0:f615d151a72c 79 #endif
Michielber 0:f615d151a72c 80
Michielber 0:f615d151a72c 81 void NTPClient::doSetTime(const Host& host)
Michielber 0:f615d151a72c 82 {
Michielber 0:f615d151a72c 83 init();
Michielber 0:f615d151a72c 84 resetTimeout();
Michielber 0:f615d151a72c 85 m_host = host;
Michielber 0:f615d151a72c 86 if(!m_host.getPort())
Michielber 0:f615d151a72c 87 {
Michielber 0:f615d151a72c 88 m_host.setPort(NTP_PORT);
Michielber 0:f615d151a72c 89 }
Michielber 0:f615d151a72c 90 if(m_host.getIp().isNull())
Michielber 0:f615d151a72c 91 {
Michielber 0:f615d151a72c 92 //DNS query required
Michielber 0:f615d151a72c 93 m_pDnsReq = new DNSRequest();
Michielber 0:f615d151a72c 94 DBG("\r\nNTPClient : DNSRequest %p\r\n", m_pDnsReq);
Michielber 0:f615d151a72c 95 m_pDnsReq->setOnReply(this, &NTPClient::onDNSReply);
Michielber 0:f615d151a72c 96 m_pDnsReq->resolve(&m_host);
Michielber 0:f615d151a72c 97 return;
Michielber 0:f615d151a72c 98 }
Michielber 0:f615d151a72c 99 open();
Michielber 0:f615d151a72c 100 }
Michielber 0:f615d151a72c 101
Michielber 0:f615d151a72c 102 void NTPClient::setOnResult( void (*pMethod)(NTPResult) )
Michielber 0:f615d151a72c 103 {
Michielber 0:f615d151a72c 104 m_pCb = pMethod;
Michielber 0:f615d151a72c 105 }
Michielber 0:f615d151a72c 106
Michielber 0:f615d151a72c 107 void NTPClient::close()
Michielber 0:f615d151a72c 108 {
Michielber 0:f615d151a72c 109 if(m_closed)
Michielber 0:f615d151a72c 110 return;
Michielber 0:f615d151a72c 111 m_closed = true; //Prevent recursive calling or calling on an object being destructed by someone else
Michielber 0:f615d151a72c 112 m_watchdog.stop();
Michielber 0:f615d151a72c 113 m_pUDPSocket->resetOnEvent();
Michielber 0:f615d151a72c 114 m_pUDPSocket->close();
Michielber 0:f615d151a72c 115 delete m_pUDPSocket;
Michielber 0:f615d151a72c 116 if( m_pDnsReq )
Michielber 0:f615d151a72c 117 {
Michielber 0:f615d151a72c 118 m_pDnsReq->close();
Michielber 0:f615d151a72c 119 delete m_pDnsReq;
Michielber 0:f615d151a72c 120 m_pDnsReq = NULL;
Michielber 0:f615d151a72c 121 }
Michielber 0:f615d151a72c 122 }
Michielber 0:f615d151a72c 123
Michielber 0:f615d151a72c 124 void NTPClient::poll() //Called by NetServices
Michielber 0:f615d151a72c 125 {
Michielber 0:f615d151a72c 126 if( (!m_closed) && (m_watchdog.read_ms() >= m_timeout) )
Michielber 0:f615d151a72c 127 {
Michielber 0:f615d151a72c 128 onTimeout();
Michielber 0:f615d151a72c 129 }
Michielber 0:f615d151a72c 130 }
Michielber 0:f615d151a72c 131
Michielber 0:f615d151a72c 132 void NTPClient::init() //Create and setup socket if needed
Michielber 0:f615d151a72c 133 {
Michielber 0:f615d151a72c 134 if(!m_closed) //Already opened
Michielber 0:f615d151a72c 135 return;
Michielber 0:f615d151a72c 136 m_state = NTP_PING;
Michielber 0:f615d151a72c 137 m_pUDPSocket = new UDPSocket;
Michielber 0:f615d151a72c 138 m_pUDPSocket->setOnEvent(this, &NTPClient::onUDPSocketEvent);
Michielber 0:f615d151a72c 139 m_closed = false;
Michielber 0:f615d151a72c 140 DBG("NTPClient: Init OK\n");
Michielber 0:f615d151a72c 141 }
Michielber 0:f615d151a72c 142
Michielber 0:f615d151a72c 143 void NTPClient::open()
Michielber 0:f615d151a72c 144 {
Michielber 0:f615d151a72c 145 resetTimeout();
Michielber 0:f615d151a72c 146 DBG("Opening connection\n");
Michielber 0:f615d151a72c 147 m_state = NTP_PING;
Michielber 0:f615d151a72c 148 Host localhost(IpAddr(), NTP_CLIENT_PORT, "localhost"); //Any local address
Michielber 0:f615d151a72c 149 m_pUDPSocket->bind(localhost);
Michielber 0:f615d151a72c 150 if ((int)time(NULL) < 1280000000) set_time( 1280000000 ); //End of July 2010... just there to limit offset range
Michielber 0:f615d151a72c 151 process();
Michielber 0:f615d151a72c 152 }
Michielber 0:f615d151a72c 153
Michielber 0:f615d151a72c 154 #define MIN(a,b) ((a)<(b))?(a):(b)
Michielber 0:f615d151a72c 155 void NTPClient::process() //Main state-machine
Michielber 0:f615d151a72c 156 {
Michielber 0:f615d151a72c 157 int len;
Michielber 0:f615d151a72c 158 Host host;
Michielber 0:f615d151a72c 159
Michielber 0:f615d151a72c 160 switch(m_state)
Michielber 0:f615d151a72c 161 {
Michielber 0:f615d151a72c 162 case NTP_PING:
Michielber 0:f615d151a72c 163 DBG("\r\nPing\r\n");
Michielber 0:f615d151a72c 164 //Prepare NTP Packet:
Michielber 0:f615d151a72c 165 m_pkt.li = 0; //Leap Indicator : No warning
Michielber 0:f615d151a72c 166 m_pkt.vn = 4; //Version Number : 4
Michielber 0:f615d151a72c 167 m_pkt.mode = 3; //Client mode
Michielber 0:f615d151a72c 168 m_pkt.stratum = 0; //Not relevant here
Michielber 0:f615d151a72c 169 m_pkt.poll = 0; //Not significant as well
Michielber 0:f615d151a72c 170 m_pkt.precision = 0; //Neither this one is
Michielber 0:f615d151a72c 171
Michielber 0:f615d151a72c 172 m_pkt.rootDelay = 0; //Or this one
Michielber 0:f615d151a72c 173 m_pkt.rootDispersion = 0; //Or that one
Michielber 0:f615d151a72c 174 m_pkt.refId = 0; //...
Michielber 0:f615d151a72c 175
Michielber 0:f615d151a72c 176 m_pkt.refTm_s = 0;
Michielber 0:f615d151a72c 177 m_pkt.origTm_s = 0;
Michielber 0:f615d151a72c 178 m_pkt.rxTm_s = 0;
Michielber 0:f615d151a72c 179 m_pkt.txTm_s = htonl( NTP_TIMESTAMP_DELTA + time(NULL) ); //WARN: We are in LE format, network byte order is BE
Michielber 0:f615d151a72c 180
Michielber 0:f615d151a72c 181 m_pkt.refTm_f = m_pkt.origTm_f = m_pkt.rxTm_f = m_pkt.txTm_f = 0;
Michielber 0:f615d151a72c 182
Michielber 0:f615d151a72c 183 #ifdef __DEBUG
Michielber 0:f615d151a72c 184 //Hex Dump:
Michielber 0:f615d151a72c 185 DBG("\r\nDump Tx:\r\n");
Michielber 0:f615d151a72c 186 for(int i = 0; i< sizeof(NTPPacket); i++)
Michielber 0:f615d151a72c 187 {
Michielber 0:f615d151a72c 188 DBG("%02x ", *((char*)&m_pkt + i));
Michielber 0:f615d151a72c 189 }
Michielber 0:f615d151a72c 190 DBG("\r\n\r\n");
Michielber 0:f615d151a72c 191 #endif
Michielber 0:f615d151a72c 192
Michielber 0:f615d151a72c 193 len = m_pUDPSocket->sendto( (char*)&m_pkt, sizeof(NTPPacket), &m_host );
Michielber 0:f615d151a72c 194 if(len < sizeof(NTPPacket))
Michielber 0:f615d151a72c 195 { onResult(NTP_PRTCL); close(); return; }
Michielber 0:f615d151a72c 196
Michielber 0:f615d151a72c 197 m_state = NTP_PONG;
Michielber 0:f615d151a72c 198
Michielber 0:f615d151a72c 199 break;
Michielber 0:f615d151a72c 200
Michielber 0:f615d151a72c 201 case NTP_PONG:
Michielber 0:f615d151a72c 202 DBG("\r\nPong\r\n");
Michielber 0:f615d151a72c 203 while( len = m_pUDPSocket->recvfrom( (char*)&m_pkt, sizeof(NTPPacket), &host ) )
Michielber 0:f615d151a72c 204 {
Michielber 0:f615d151a72c 205 if( len <= 0 )
Michielber 0:f615d151a72c 206 break;
Michielber 0:f615d151a72c 207 if( !host.getIp().isEq(m_host.getIp()) )
Michielber 0:f615d151a72c 208 continue; //Not our packet
Michielber 0:f615d151a72c 209 if( len > 0 )
Michielber 0:f615d151a72c 210 break;
Michielber 0:f615d151a72c 211 }
Michielber 0:f615d151a72c 212
Michielber 0:f615d151a72c 213 if(len == 0)
Michielber 0:f615d151a72c 214 return; //Wait for the next packet
Michielber 0:f615d151a72c 215
Michielber 0:f615d151a72c 216 if(len < 0)
Michielber 0:f615d151a72c 217 { onResult(NTP_PRTCL); close(); return; }
Michielber 0:f615d151a72c 218
Michielber 0:f615d151a72c 219 if(len < sizeof(NTPPacket)) //TODO: Accept chunks
Michielber 0:f615d151a72c 220 { onResult(NTP_PRTCL); close(); return; }
Michielber 0:f615d151a72c 221
Michielber 0:f615d151a72c 222 #ifdef __DEBUG
Michielber 0:f615d151a72c 223 //Hex Dump:
Michielber 0:f615d151a72c 224 DBG("\r\nDump Rx:\r\n");
Michielber 0:f615d151a72c 225 for(int i = 0; i< sizeof(NTPPacket); i++)
Michielber 0:f615d151a72c 226 {
Michielber 0:f615d151a72c 227 DBG("%02x ", *((char*)&m_pkt + i));
Michielber 0:f615d151a72c 228 }
Michielber 0:f615d151a72c 229 DBG("\r\n\r\n");
Michielber 0:f615d151a72c 230 #endif
Michielber 0:f615d151a72c 231
Michielber 0:f615d151a72c 232 if( m_pkt.stratum == 0) //Kiss of death message : Not good !
Michielber 0:f615d151a72c 233 {
Michielber 0:f615d151a72c 234 onResult(NTP_PRTCL); close(); return;
Michielber 0:f615d151a72c 235 }
Michielber 0:f615d151a72c 236
Michielber 0:f615d151a72c 237 //Correct Endianness
Michielber 0:f615d151a72c 238 m_pkt.refTm_s = ntohl( m_pkt.refTm_s );
Michielber 0:f615d151a72c 239 m_pkt.refTm_f = ntohl( m_pkt.refTm_f );
Michielber 0:f615d151a72c 240 m_pkt.origTm_s = ntohl( m_pkt.origTm_s );
Michielber 0:f615d151a72c 241 m_pkt.origTm_f = ntohl( m_pkt.origTm_f );
Michielber 0:f615d151a72c 242 m_pkt.rxTm_s = ntohl( m_pkt.rxTm_s );
Michielber 0:f615d151a72c 243 m_pkt.rxTm_f = ntohl( m_pkt.rxTm_f );
Michielber 0:f615d151a72c 244 m_pkt.txTm_s = ntohl( m_pkt.txTm_s );
Michielber 0:f615d151a72c 245 m_pkt.txTm_f = ntohl( m_pkt.txTm_f );
Michielber 0:f615d151a72c 246
Michielber 0:f615d151a72c 247 //Compute offset, see RFC 4330 p.13
Michielber 0:f615d151a72c 248 uint32_t destTm_s = (NTP_TIMESTAMP_DELTA + time(NULL));
Michielber 0:f615d151a72c 249 //int32_t origTm = (int32_t) ((uint64_t) m_pkt.origTm - NTP_TIMESTAMP_DELTA); //Convert in local 32 bits timestamps
Michielber 0:f615d151a72c 250 //int32_t rxTm = (int32_t) ((uint64_t) m_pkt.rxTm - NTP_TIMESTAMP_DELTA); //Convert in local 32 bits timestamps
Michielber 0:f615d151a72c 251 //int32_t txTm = (int32_t) ((uint64_t) m_pkt.txTm - NTP_TIMESTAMP_DELTA); //Convert in local 32 bits timestamps
Michielber 0:f615d151a72c 252 // int64_t offset = ( ( ( m_pkt.rxTm_s - m_pkt.origTm_s ) + ( m_pkt.txTm_s - destTm_s ) ) << 32 + ( ( m_pkt.rxTm_f - m_pkt.origTm_f ) + ( m_pkt.txTm_f - 0 ) ) ) / 2;
Michielber 0:f615d151a72c 253 int64_t offset = ( (int64_t)( m_pkt.rxTm_s - m_pkt.origTm_s ) + (int64_t) ( m_pkt.txTm_s - destTm_s ) ) / 2; //Avoid overflow
Michielber 0:f615d151a72c 254 DBG("\r\nSent @%d\r\n", m_pkt.txTm_s);
Michielber 0:f615d151a72c 255 DBG("\r\nOffset: %d\r\n", offset);
Michielber 0:f615d151a72c 256 //Set time accordingly
Michielber 0:f615d151a72c 257 set_time( time(NULL) + (offset /*>> 32*/) );
Michielber 0:f615d151a72c 258
Michielber 0:f615d151a72c 259 onResult(NTP_OK);
Michielber 0:f615d151a72c 260 close();
Michielber 0:f615d151a72c 261
Michielber 0:f615d151a72c 262 break;
Michielber 0:f615d151a72c 263 }
Michielber 0:f615d151a72c 264 }
Michielber 0:f615d151a72c 265
Michielber 0:f615d151a72c 266 void NTPClient::setTimeout(int ms)
Michielber 0:f615d151a72c 267 {
Michielber 0:f615d151a72c 268 m_timeout = ms;
Michielber 0:f615d151a72c 269 }
Michielber 0:f615d151a72c 270
Michielber 0:f615d151a72c 271 void NTPClient::resetTimeout()
Michielber 0:f615d151a72c 272 {
Michielber 0:f615d151a72c 273 m_watchdog.reset();
Michielber 0:f615d151a72c 274 m_watchdog.start();
Michielber 0:f615d151a72c 275 }
Michielber 0:f615d151a72c 276
Michielber 0:f615d151a72c 277 void NTPClient::onTimeout() //Connection has timed out
Michielber 0:f615d151a72c 278 {
Michielber 0:f615d151a72c 279 close();
Michielber 0:f615d151a72c 280 onResult(NTP_TIMEOUT);
Michielber 0:f615d151a72c 281 }
Michielber 0:f615d151a72c 282
Michielber 0:f615d151a72c 283 void NTPClient::onDNSReply(DNSReply r)
Michielber 0:f615d151a72c 284 {
Michielber 0:f615d151a72c 285 if(m_closed)
Michielber 0:f615d151a72c 286 {
Michielber 0:f615d151a72c 287 DBG("\r\nWARN: Discarded\r\n");
Michielber 0:f615d151a72c 288 return;
Michielber 0:f615d151a72c 289 }
Michielber 0:f615d151a72c 290
Michielber 0:f615d151a72c 291 if( r != DNS_FOUND )
Michielber 0:f615d151a72c 292 {
Michielber 0:f615d151a72c 293 DBG("\r\nCould not resolve hostname.\r\n");
Michielber 0:f615d151a72c 294 onResult(NTP_DNS);
Michielber 0:f615d151a72c 295 close();
Michielber 0:f615d151a72c 296 return;
Michielber 0:f615d151a72c 297 }
Michielber 0:f615d151a72c 298 DBG("\r\nDNS resolved.\r\n");
Michielber 0:f615d151a72c 299 m_pDnsReq->close();
Michielber 0:f615d151a72c 300 delete m_pDnsReq;
Michielber 0:f615d151a72c 301 m_pDnsReq=NULL;
Michielber 0:f615d151a72c 302 open();
Michielber 0:f615d151a72c 303 }
Michielber 0:f615d151a72c 304
Michielber 0:f615d151a72c 305 void NTPClient::onUDPSocketEvent(UDPSocketEvent e)
Michielber 0:f615d151a72c 306 {
Michielber 0:f615d151a72c 307 resetTimeout();
Michielber 0:f615d151a72c 308 switch(e)
Michielber 0:f615d151a72c 309 {
Michielber 0:f615d151a72c 310 case UDPSOCKET_READABLE: //The only event for now
Michielber 0:f615d151a72c 311 resetTimeout();
Michielber 0:f615d151a72c 312 process();
Michielber 0:f615d151a72c 313 break;
Michielber 0:f615d151a72c 314 }
Michielber 0:f615d151a72c 315 }
Michielber 0:f615d151a72c 316
Michielber 0:f615d151a72c 317 void NTPClient::onResult(NTPResult r) //Must be called by impl when the request completes
Michielber 0:f615d151a72c 318 {
Michielber 0:f615d151a72c 319 if(m_pCbItem && m_pCbMeth)
Michielber 0:f615d151a72c 320 (m_pCbItem->*m_pCbMeth)(r);
Michielber 0:f615d151a72c 321 else if(m_pCb)
Michielber 0:f615d151a72c 322 m_pCb(r);
Michielber 0:f615d151a72c 323 m_blockingResult = r; //Blocking mode
Michielber 0:f615d151a72c 324 }
Michielber 0:f615d151a72c 325
Michielber 0:f615d151a72c 326 NTPResult NTPClient::blockingProcess() //Called in blocking mode, calls Net::poll() until return code is available
Michielber 0:f615d151a72c 327 {
Michielber 0:f615d151a72c 328 m_blockingResult = NTP_PROCESSING;
Michielber 0:f615d151a72c 329 do
Michielber 0:f615d151a72c 330 {
Michielber 0:f615d151a72c 331 Net::poll();
Michielber 0:f615d151a72c 332 } while(m_blockingResult == NTP_PROCESSING);
Michielber 0:f615d151a72c 333 Net::poll(); //Necessary for cleanup
Michielber 0:f615d151a72c 334 return m_blockingResult;
Michielber 0:f615d151a72c 335 }