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Library for Bert van Dam's book "ARM MICROCONTROLLERS" For all chapters with internet.

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NetServices/services/ntp/NTPClient.cpp@0:4edb816d21e1, 2015-10-16 (annotated)

Committer:
ICTFBI
Date:
Fri Oct 16 14:28:26 2015 +0000
Revision:
0:4edb816d21e1
Pre-update 16-10-15

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ICTFBI 0:4edb816d21e1 1 #pragma diag_remark 1293
ICTFBI 0:4edb816d21e1 2 /*
ICTFBI 0:4edb816d21e1 3 Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com)
ICTFBI 0:4edb816d21e1 4
ICTFBI 0:4edb816d21e1 5 Permission is hereby granted, free of charge, to any person obtaining a copy
ICTFBI 0:4edb816d21e1 6 of this software and associated documentation files (the "Software"), to deal
ICTFBI 0:4edb816d21e1 7 in the Software without restriction, including without limitation the rights
ICTFBI 0:4edb816d21e1 8 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
ICTFBI 0:4edb816d21e1 9 copies of the Software, and to permit persons to whom the Software is
ICTFBI 0:4edb816d21e1 10 furnished to do so, subject to the following conditions:
ICTFBI 0:4edb816d21e1 11
ICTFBI 0:4edb816d21e1 12 The above copyright notice and this permission notice shall be included in
ICTFBI 0:4edb816d21e1 13 all copies or substantial portions of the Software.
ICTFBI 0:4edb816d21e1 14
ICTFBI 0:4edb816d21e1 15 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
ICTFBI 0:4edb816d21e1 16 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
ICTFBI 0:4edb816d21e1 17 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
ICTFBI 0:4edb816d21e1 18 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
ICTFBI 0:4edb816d21e1 19 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
ICTFBI 0:4edb816d21e1 20 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
ICTFBI 0:4edb816d21e1 21 THE SOFTWARE.
ICTFBI 0:4edb816d21e1 22 */
ICTFBI 0:4edb816d21e1 23
ICTFBI 0:4edb816d21e1 24 #include "NTPClient.h"
ICTFBI 0:4edb816d21e1 25
ICTFBI 0:4edb816d21e1 26 #include <stdio.h>
ICTFBI 0:4edb816d21e1 27
ICTFBI 0:4edb816d21e1 28 //#define __DEBUG
ICTFBI 0:4edb816d21e1 29 #include "dbg/dbg.h"
ICTFBI 0:4edb816d21e1 30
ICTFBI 0:4edb816d21e1 31 #define NTP_PORT 123
ICTFBI 0:4edb816d21e1 32 #define NTP_CLIENT_PORT 0//50420 //Random port
ICTFBI 0:4edb816d21e1 33 #define NTP_REQUEST_TIMEOUT 15000
ICTFBI 0:4edb816d21e1 34 #define NTP_TIMESTAMP_DELTA 2208988800ull //Diff btw a UNIX timestamp (Starting Jan, 1st 1970) and a NTP timestamp (Starting Jan, 1st 1900)
ICTFBI 0:4edb816d21e1 35
ICTFBI 0:4edb816d21e1 36 #define htons( x ) ( (( x << 8 ) & 0xFF00) | (( x >> 8 ) & 0x00FF) )
ICTFBI 0:4edb816d21e1 37 #define ntohs( x ) (htons(x))
ICTFBI 0:4edb816d21e1 38
ICTFBI 0:4edb816d21e1 39 #define htonl( x ) ( (( x << 24 ) & 0xFF000000) \
ICTFBI 0:4edb816d21e1 40 | (( x << 8 ) & 0x00FF0000) \
ICTFBI 0:4edb816d21e1 41 | (( x >> 8 ) & 0x0000FF00) \
ICTFBI 0:4edb816d21e1 42 | (( x >> 24 ) & 0x000000FF) )
ICTFBI 0:4edb816d21e1 43 #define ntohl( x ) (htonl(x))
ICTFBI 0:4edb816d21e1 44
ICTFBI 0:4edb816d21e1 45 NTPClient::NTPClient() : NetService(false), m_state(NTP_PING), m_pCbItem(NULL), m_pCbMeth(NULL), m_pCb(NULL),
ICTFBI 0:4edb816d21e1 46 m_watchdog(), m_timeout(0), m_closed(true), m_host(), m_pDnsReq(NULL), m_blockingResult(NTP_PROCESSING)
ICTFBI 0:4edb816d21e1 47 {
ICTFBI 0:4edb816d21e1 48 setTimeout(NTP_REQUEST_TIMEOUT);
ICTFBI 0:4edb816d21e1 49 DBG("\r\nNew NTPClient %p\r\n",this);
ICTFBI 0:4edb816d21e1 50 }
ICTFBI 0:4edb816d21e1 51
ICTFBI 0:4edb816d21e1 52 NTPClient::~NTPClient()
ICTFBI 0:4edb816d21e1 53 {
ICTFBI 0:4edb816d21e1 54 close();
ICTFBI 0:4edb816d21e1 55 }
ICTFBI 0:4edb816d21e1 56
ICTFBI 0:4edb816d21e1 57 //High level setup functions
ICTFBI 0:4edb816d21e1 58 NTPResult NTPClient::setTime(const Host& host) //Blocking
ICTFBI 0:4edb816d21e1 59 {
ICTFBI 0:4edb816d21e1 60 doSetTime(host);
ICTFBI 0:4edb816d21e1 61 return blockingProcess();
ICTFBI 0:4edb816d21e1 62 }
ICTFBI 0:4edb816d21e1 63
ICTFBI 0:4edb816d21e1 64 NTPResult NTPClient::setTime(const Host& host, void (*pMethod)(NTPResult)) //Non blocking
ICTFBI 0:4edb816d21e1 65 {
ICTFBI 0:4edb816d21e1 66 setOnResult(pMethod);
ICTFBI 0:4edb816d21e1 67 doSetTime(host);
ICTFBI 0:4edb816d21e1 68 return NTP_PROCESSING;
ICTFBI 0:4edb816d21e1 69 }
ICTFBI 0:4edb816d21e1 70
ICTFBI 0:4edb816d21e1 71 #if 0 //For doc only
ICTFBI 0:4edb816d21e1 72 template<class T>
ICTFBI 0:4edb816d21e1 73 NTPResult NTPClient::setTime(const Host& host, T* pItem, void (T::*pMethod)(NTPResult)) //Non blocking
ICTFBI 0:4edb816d21e1 74 {
ICTFBI 0:4edb816d21e1 75 setOnResult(pItem, pMethod);
ICTFBI 0:4edb816d21e1 76 doSetTime(host);
ICTFBI 0:4edb816d21e1 77 return NTP_PROCESSING;
ICTFBI 0:4edb816d21e1 78 }
ICTFBI 0:4edb816d21e1 79 #endif
ICTFBI 0:4edb816d21e1 80
ICTFBI 0:4edb816d21e1 81 void NTPClient::doSetTime(const Host& host)
ICTFBI 0:4edb816d21e1 82 {
ICTFBI 0:4edb816d21e1 83 init();
ICTFBI 0:4edb816d21e1 84 resetTimeout();
ICTFBI 0:4edb816d21e1 85 m_host = host;
ICTFBI 0:4edb816d21e1 86 if(!m_host.getPort())
ICTFBI 0:4edb816d21e1 87 {
ICTFBI 0:4edb816d21e1 88 m_host.setPort(NTP_PORT);
ICTFBI 0:4edb816d21e1 89 }
ICTFBI 0:4edb816d21e1 90 if(m_host.getIp().isNull())
ICTFBI 0:4edb816d21e1 91 {
ICTFBI 0:4edb816d21e1 92 //DNS query required
ICTFBI 0:4edb816d21e1 93 m_pDnsReq = new DNSRequest();
ICTFBI 0:4edb816d21e1 94 DBG("\r\nNTPClient : DNSRequest %p\r\n", m_pDnsReq);
ICTFBI 0:4edb816d21e1 95 m_pDnsReq->setOnReply(this, &NTPClient::onDNSReply);
ICTFBI 0:4edb816d21e1 96 m_pDnsReq->resolve(&m_host);
ICTFBI 0:4edb816d21e1 97 return;
ICTFBI 0:4edb816d21e1 98 }
ICTFBI 0:4edb816d21e1 99 open();
ICTFBI 0:4edb816d21e1 100 }
ICTFBI 0:4edb816d21e1 101
ICTFBI 0:4edb816d21e1 102 void NTPClient::setOnResult( void (*pMethod)(NTPResult) )
ICTFBI 0:4edb816d21e1 103 {
ICTFBI 0:4edb816d21e1 104 m_pCb = pMethod;
ICTFBI 0:4edb816d21e1 105 }
ICTFBI 0:4edb816d21e1 106
ICTFBI 0:4edb816d21e1 107 void NTPClient::close()
ICTFBI 0:4edb816d21e1 108 {
ICTFBI 0:4edb816d21e1 109 if(m_closed)
ICTFBI 0:4edb816d21e1 110 return;
ICTFBI 0:4edb816d21e1 111 m_closed = true; //Prevent recursive calling or calling on an object being destructed by someone else
ICTFBI 0:4edb816d21e1 112 m_watchdog.stop();
ICTFBI 0:4edb816d21e1 113 m_pUDPSocket->resetOnEvent();
ICTFBI 0:4edb816d21e1 114 m_pUDPSocket->close();
ICTFBI 0:4edb816d21e1 115 delete m_pUDPSocket;
ICTFBI 0:4edb816d21e1 116 if( m_pDnsReq )
ICTFBI 0:4edb816d21e1 117 {
ICTFBI 0:4edb816d21e1 118 m_pDnsReq->close();
ICTFBI 0:4edb816d21e1 119 delete m_pDnsReq;
ICTFBI 0:4edb816d21e1 120 m_pDnsReq = NULL;
ICTFBI 0:4edb816d21e1 121 }
ICTFBI 0:4edb816d21e1 122 }
ICTFBI 0:4edb816d21e1 123
ICTFBI 0:4edb816d21e1 124 void NTPClient::poll() //Called by NetServices
ICTFBI 0:4edb816d21e1 125 {
ICTFBI 0:4edb816d21e1 126 if( (!m_closed) && (m_watchdog.read_ms() >= m_timeout) )
ICTFBI 0:4edb816d21e1 127 {
ICTFBI 0:4edb816d21e1 128 onTimeout();
ICTFBI 0:4edb816d21e1 129 }
ICTFBI 0:4edb816d21e1 130 }
ICTFBI 0:4edb816d21e1 131
ICTFBI 0:4edb816d21e1 132 void NTPClient::init() //Create and setup socket if needed
ICTFBI 0:4edb816d21e1 133 {
ICTFBI 0:4edb816d21e1 134 if(!m_closed) //Already opened
ICTFBI 0:4edb816d21e1 135 return;
ICTFBI 0:4edb816d21e1 136 m_state = NTP_PING;
ICTFBI 0:4edb816d21e1 137 m_pUDPSocket = new UDPSocket;
ICTFBI 0:4edb816d21e1 138 m_pUDPSocket->setOnEvent(this, &NTPClient::onUDPSocketEvent);
ICTFBI 0:4edb816d21e1 139 m_closed = false;
ICTFBI 0:4edb816d21e1 140 DBG("NTPClient: Init OK\n");
ICTFBI 0:4edb816d21e1 141 }
ICTFBI 0:4edb816d21e1 142
ICTFBI 0:4edb816d21e1 143 void NTPClient::open()
ICTFBI 0:4edb816d21e1 144 {
ICTFBI 0:4edb816d21e1 145 resetTimeout();
ICTFBI 0:4edb816d21e1 146 DBG("Opening connection\n");
ICTFBI 0:4edb816d21e1 147 m_state = NTP_PING;
ICTFBI 0:4edb816d21e1 148 Host localhost(IpAddr(), NTP_CLIENT_PORT, "localhost"); //Any local address
ICTFBI 0:4edb816d21e1 149 m_pUDPSocket->bind(localhost);
ICTFBI 0:4edb816d21e1 150 if ((int)time(NULL) < 1280000000) set_time( 1280000000 ); //End of July 2010... just there to limit offset range
ICTFBI 0:4edb816d21e1 151 process();
ICTFBI 0:4edb816d21e1 152 }
ICTFBI 0:4edb816d21e1 153
ICTFBI 0:4edb816d21e1 154 #define MIN(a,b) ((a)<(b))?(a):(b)
ICTFBI 0:4edb816d21e1 155 void NTPClient::process() //Main state-machine
ICTFBI 0:4edb816d21e1 156 {
ICTFBI 0:4edb816d21e1 157 int len;
ICTFBI 0:4edb816d21e1 158 Host host;
ICTFBI 0:4edb816d21e1 159
ICTFBI 0:4edb816d21e1 160 switch(m_state)
ICTFBI 0:4edb816d21e1 161 {
ICTFBI 0:4edb816d21e1 162 case NTP_PING:
ICTFBI 0:4edb816d21e1 163 DBG("\r\nPing\r\n");
ICTFBI 0:4edb816d21e1 164 //Prepare NTP Packet:
ICTFBI 0:4edb816d21e1 165 m_pkt.li = 0; //Leap Indicator : No warning
ICTFBI 0:4edb816d21e1 166 m_pkt.vn = 4; //Version Number : 4
ICTFBI 0:4edb816d21e1 167 m_pkt.mode = 3; //Client mode
ICTFBI 0:4edb816d21e1 168 m_pkt.stratum = 0; //Not relevant here
ICTFBI 0:4edb816d21e1 169 m_pkt.poll = 0; //Not significant as well
ICTFBI 0:4edb816d21e1 170 m_pkt.precision = 0; //Neither this one is
ICTFBI 0:4edb816d21e1 171
ICTFBI 0:4edb816d21e1 172 m_pkt.rootDelay = 0; //Or this one
ICTFBI 0:4edb816d21e1 173 m_pkt.rootDispersion = 0; //Or that one
ICTFBI 0:4edb816d21e1 174 m_pkt.refId = 0; //...
ICTFBI 0:4edb816d21e1 175
ICTFBI 0:4edb816d21e1 176 m_pkt.refTm_s = 0;
ICTFBI 0:4edb816d21e1 177 m_pkt.origTm_s = 0;
ICTFBI 0:4edb816d21e1 178 m_pkt.rxTm_s = 0;
ICTFBI 0:4edb816d21e1 179 m_pkt.txTm_s = htonl( NTP_TIMESTAMP_DELTA + time(NULL) ); //WARN: We are in LE format, network byte order is BE
ICTFBI 0:4edb816d21e1 180
ICTFBI 0:4edb816d21e1 181 m_pkt.refTm_f = m_pkt.origTm_f = m_pkt.rxTm_f = m_pkt.txTm_f = 0;
ICTFBI 0:4edb816d21e1 182
ICTFBI 0:4edb816d21e1 183 #ifdef __DEBUG
ICTFBI 0:4edb816d21e1 184 //Hex Dump:
ICTFBI 0:4edb816d21e1 185 DBG("\r\nDump Tx:\r\n");
ICTFBI 0:4edb816d21e1 186 for(int i = 0; i< sizeof(NTPPacket); i++)
ICTFBI 0:4edb816d21e1 187 {
ICTFBI 0:4edb816d21e1 188 DBG("%02x ", *((char*)&m_pkt + i));
ICTFBI 0:4edb816d21e1 189 }
ICTFBI 0:4edb816d21e1 190 DBG("\r\n\r\n");
ICTFBI 0:4edb816d21e1 191 #endif
ICTFBI 0:4edb816d21e1 192
ICTFBI 0:4edb816d21e1 193 len = m_pUDPSocket->sendto( (char*)&m_pkt, sizeof(NTPPacket), &m_host );
ICTFBI 0:4edb816d21e1 194 if(len < sizeof(NTPPacket))
ICTFBI 0:4edb816d21e1 195 { onResult(NTP_PRTCL); close(); return; }
ICTFBI 0:4edb816d21e1 196
ICTFBI 0:4edb816d21e1 197 m_state = NTP_PONG;
ICTFBI 0:4edb816d21e1 198
ICTFBI 0:4edb816d21e1 199 break;
ICTFBI 0:4edb816d21e1 200
ICTFBI 0:4edb816d21e1 201 case NTP_PONG:
ICTFBI 0:4edb816d21e1 202 DBG("\r\nPong\r\n");
ICTFBI 0:4edb816d21e1 203 while( len = m_pUDPSocket->recvfrom( (char*)&m_pkt, sizeof(NTPPacket), &host ) )
ICTFBI 0:4edb816d21e1 204 {
ICTFBI 0:4edb816d21e1 205 if( len <= 0 )
ICTFBI 0:4edb816d21e1 206 break;
ICTFBI 0:4edb816d21e1 207 if( !host.getIp().isEq(m_host.getIp()) )
ICTFBI 0:4edb816d21e1 208 continue; //Not our packet
ICTFBI 0:4edb816d21e1 209 if( len > 0 )
ICTFBI 0:4edb816d21e1 210 break;
ICTFBI 0:4edb816d21e1 211 }
ICTFBI 0:4edb816d21e1 212
ICTFBI 0:4edb816d21e1 213 if(len == 0)
ICTFBI 0:4edb816d21e1 214 return; //Wait for the next packet
ICTFBI 0:4edb816d21e1 215
ICTFBI 0:4edb816d21e1 216 if(len < 0)
ICTFBI 0:4edb816d21e1 217 { onResult(NTP_PRTCL); close(); return; }
ICTFBI 0:4edb816d21e1 218
ICTFBI 0:4edb816d21e1 219 if(len < sizeof(NTPPacket)) //TODO: Accept chunks
ICTFBI 0:4edb816d21e1 220 { onResult(NTP_PRTCL); close(); return; }
ICTFBI 0:4edb816d21e1 221
ICTFBI 0:4edb816d21e1 222 #ifdef __DEBUG
ICTFBI 0:4edb816d21e1 223 //Hex Dump:
ICTFBI 0:4edb816d21e1 224 DBG("\r\nDump Rx:\r\n");
ICTFBI 0:4edb816d21e1 225 for(int i = 0; i< sizeof(NTPPacket); i++)
ICTFBI 0:4edb816d21e1 226 {
ICTFBI 0:4edb816d21e1 227 DBG("%02x ", *((char*)&m_pkt + i));
ICTFBI 0:4edb816d21e1 228 }
ICTFBI 0:4edb816d21e1 229 DBG("\r\n\r\n");
ICTFBI 0:4edb816d21e1 230 #endif
ICTFBI 0:4edb816d21e1 231
ICTFBI 0:4edb816d21e1 232 if( m_pkt.stratum == 0) //Kiss of death message : Not good !
ICTFBI 0:4edb816d21e1 233 {
ICTFBI 0:4edb816d21e1 234 onResult(NTP_PRTCL); close(); return;
ICTFBI 0:4edb816d21e1 235 }
ICTFBI 0:4edb816d21e1 236
ICTFBI 0:4edb816d21e1 237 //Correct Endianness
ICTFBI 0:4edb816d21e1 238 m_pkt.refTm_s = ntohl( m_pkt.refTm_s );
ICTFBI 0:4edb816d21e1 239 m_pkt.refTm_f = ntohl( m_pkt.refTm_f );
ICTFBI 0:4edb816d21e1 240 m_pkt.origTm_s = ntohl( m_pkt.origTm_s );
ICTFBI 0:4edb816d21e1 241 m_pkt.origTm_f = ntohl( m_pkt.origTm_f );
ICTFBI 0:4edb816d21e1 242 m_pkt.rxTm_s = ntohl( m_pkt.rxTm_s );
ICTFBI 0:4edb816d21e1 243 m_pkt.rxTm_f = ntohl( m_pkt.rxTm_f );
ICTFBI 0:4edb816d21e1 244 m_pkt.txTm_s = ntohl( m_pkt.txTm_s );
ICTFBI 0:4edb816d21e1 245 m_pkt.txTm_f = ntohl( m_pkt.txTm_f );
ICTFBI 0:4edb816d21e1 246
ICTFBI 0:4edb816d21e1 247 //Compute offset, see RFC 4330 p.13
ICTFBI 0:4edb816d21e1 248 uint32_t destTm_s = (NTP_TIMESTAMP_DELTA + time(NULL));
ICTFBI 0:4edb816d21e1 249 //int32_t origTm = (int32_t) ((uint64_t) m_pkt.origTm - NTP_TIMESTAMP_DELTA); //Convert in local 32 bits timestamps
ICTFBI 0:4edb816d21e1 250 //int32_t rxTm = (int32_t) ((uint64_t) m_pkt.rxTm - NTP_TIMESTAMP_DELTA); //Convert in local 32 bits timestamps
ICTFBI 0:4edb816d21e1 251 //int32_t txTm = (int32_t) ((uint64_t) m_pkt.txTm - NTP_TIMESTAMP_DELTA); //Convert in local 32 bits timestamps
ICTFBI 0:4edb816d21e1 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;
ICTFBI 0:4edb816d21e1 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
ICTFBI 0:4edb816d21e1 254 DBG("\r\nSent @%d\r\n", m_pkt.txTm_s);
ICTFBI 0:4edb816d21e1 255 DBG("\r\nOffset: %d\r\n", offset);
ICTFBI 0:4edb816d21e1 256 //Set time accordingly
ICTFBI 0:4edb816d21e1 257 set_time( time(NULL) + (offset /*>> 32*/) );
ICTFBI 0:4edb816d21e1 258
ICTFBI 0:4edb816d21e1 259 onResult(NTP_OK);
ICTFBI 0:4edb816d21e1 260 close();
ICTFBI 0:4edb816d21e1 261
ICTFBI 0:4edb816d21e1 262 break;
ICTFBI 0:4edb816d21e1 263 }
ICTFBI 0:4edb816d21e1 264 }
ICTFBI 0:4edb816d21e1 265
ICTFBI 0:4edb816d21e1 266 void NTPClient::setTimeout(int ms)
ICTFBI 0:4edb816d21e1 267 {
ICTFBI 0:4edb816d21e1 268 m_timeout = ms;
ICTFBI 0:4edb816d21e1 269 }
ICTFBI 0:4edb816d21e1 270
ICTFBI 0:4edb816d21e1 271 void NTPClient::resetTimeout()
ICTFBI 0:4edb816d21e1 272 {
ICTFBI 0:4edb816d21e1 273 m_watchdog.reset();
ICTFBI 0:4edb816d21e1 274 m_watchdog.start();
ICTFBI 0:4edb816d21e1 275 }
ICTFBI 0:4edb816d21e1 276
ICTFBI 0:4edb816d21e1 277 void NTPClient::onTimeout() //Connection has timed out
ICTFBI 0:4edb816d21e1 278 {
ICTFBI 0:4edb816d21e1 279 close();
ICTFBI 0:4edb816d21e1 280 onResult(NTP_TIMEOUT);
ICTFBI 0:4edb816d21e1 281 }
ICTFBI 0:4edb816d21e1 282
ICTFBI 0:4edb816d21e1 283 void NTPClient::onDNSReply(DNSReply r)
ICTFBI 0:4edb816d21e1 284 {
ICTFBI 0:4edb816d21e1 285 if(m_closed)
ICTFBI 0:4edb816d21e1 286 {
ICTFBI 0:4edb816d21e1 287 DBG("\r\nWARN: Discarded\r\n");
ICTFBI 0:4edb816d21e1 288 return;
ICTFBI 0:4edb816d21e1 289 }
ICTFBI 0:4edb816d21e1 290
ICTFBI 0:4edb816d21e1 291 if( r != DNS_FOUND )
ICTFBI 0:4edb816d21e1 292 {
ICTFBI 0:4edb816d21e1 293 DBG("\r\nCould not resolve hostname.\r\n");
ICTFBI 0:4edb816d21e1 294 onResult(NTP_DNS);
ICTFBI 0:4edb816d21e1 295 close();
ICTFBI 0:4edb816d21e1 296 return;
ICTFBI 0:4edb816d21e1 297 }
ICTFBI 0:4edb816d21e1 298 DBG("\r\nDNS resolved.\r\n");
ICTFBI 0:4edb816d21e1 299 m_pDnsReq->close();
ICTFBI 0:4edb816d21e1 300 delete m_pDnsReq;
ICTFBI 0:4edb816d21e1 301 m_pDnsReq=NULL;
ICTFBI 0:4edb816d21e1 302 open();
ICTFBI 0:4edb816d21e1 303 }
ICTFBI 0:4edb816d21e1 304
ICTFBI 0:4edb816d21e1 305 void NTPClient::onUDPSocketEvent(UDPSocketEvent e)
ICTFBI 0:4edb816d21e1 306 {
ICTFBI 0:4edb816d21e1 307 resetTimeout();
ICTFBI 0:4edb816d21e1 308 switch(e)
ICTFBI 0:4edb816d21e1 309 {
ICTFBI 0:4edb816d21e1 310 case UDPSOCKET_READABLE: //The only event for now
ICTFBI 0:4edb816d21e1 311 resetTimeout();
ICTFBI 0:4edb816d21e1 312 process();
ICTFBI 0:4edb816d21e1 313 break;
ICTFBI 0:4edb816d21e1 314 }
ICTFBI 0:4edb816d21e1 315 }
ICTFBI 0:4edb816d21e1 316
ICTFBI 0:4edb816d21e1 317 void NTPClient::onResult(NTPResult r) //Must be called by impl when the request completes
ICTFBI 0:4edb816d21e1 318 {
ICTFBI 0:4edb816d21e1 319 if(m_pCbItem && m_pCbMeth)
ICTFBI 0:4edb816d21e1 320 (m_pCbItem->*m_pCbMeth)(r);
ICTFBI 0:4edb816d21e1 321 else if(m_pCb)
ICTFBI 0:4edb816d21e1 322 m_pCb(r);
ICTFBI 0:4edb816d21e1 323 m_blockingResult = r; //Blocking mode
ICTFBI 0:4edb816d21e1 324 }
ICTFBI 0:4edb816d21e1 325
ICTFBI 0:4edb816d21e1 326 NTPResult NTPClient::blockingProcess() //Called in blocking mode, calls Net::poll() until return code is available
ICTFBI 0:4edb816d21e1 327 {
ICTFBI 0:4edb816d21e1 328 m_blockingResult = NTP_PROCESSING;
ICTFBI 0:4edb816d21e1 329 do
ICTFBI 0:4edb816d21e1 330 {
ICTFBI 0:4edb816d21e1 331 Net::poll();
ICTFBI 0:4edb816d21e1 332 } while(m_blockingResult == NTP_PROCESSING);
ICTFBI 0:4edb816d21e1 333 Net::poll(); //Necessary for cleanup
ICTFBI 0:4edb816d21e1 334 return m_blockingResult;
ICTFBI 0:4edb816d21e1 335 }