The extracted NTP client from Segundos NetServices library, for use with the [[http://mbed.org/users/hlipka/libraries/NetServicesMin|NetServicesMin]] library. The only fixed bug is the memory leak / OOM problem. Needs the [[http://mbed.org/users/hlipka/libraries/DNSResolver|DNSResolver]] library as well.
Dependents: SPIVFDclock LPC1768_AppBoard_Internet_LCD_Clock
NTPClient.cpp@1:63ded11b8fa2, 2011-01-24 (annotated)
- Committer:
- hlipka
- Date:
- Mon Jan 24 23:07:27 2011 +0000
- Revision:
- 1:63ded11b8fa2
- Parent:
- 0:ebea15f18f84
bugfix: re-added timeout handling
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
hlipka | 0:ebea15f18f84 | 1 | #pragma diag_remark 1293 |
hlipka | 0:ebea15f18f84 | 2 | /* |
hlipka | 0:ebea15f18f84 | 3 | Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com) |
hlipka | 0:ebea15f18f84 | 4 | |
hlipka | 0:ebea15f18f84 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy |
hlipka | 0:ebea15f18f84 | 6 | of this software and associated documentation files (the "Software"), to deal |
hlipka | 0:ebea15f18f84 | 7 | in the Software without restriction, including without limitation the rights |
hlipka | 0:ebea15f18f84 | 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
hlipka | 0:ebea15f18f84 | 9 | copies of the Software, and to permit persons to whom the Software is |
hlipka | 0:ebea15f18f84 | 10 | furnished to do so, subject to the following conditions: |
hlipka | 0:ebea15f18f84 | 11 | |
hlipka | 0:ebea15f18f84 | 12 | The above copyright notice and this permission notice shall be included in |
hlipka | 0:ebea15f18f84 | 13 | all copies or substantial portions of the Software. |
hlipka | 0:ebea15f18f84 | 14 | |
hlipka | 0:ebea15f18f84 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
hlipka | 0:ebea15f18f84 | 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
hlipka | 0:ebea15f18f84 | 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
hlipka | 0:ebea15f18f84 | 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
hlipka | 0:ebea15f18f84 | 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
hlipka | 0:ebea15f18f84 | 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
hlipka | 0:ebea15f18f84 | 21 | THE SOFTWARE. |
hlipka | 0:ebea15f18f84 | 22 | */ |
hlipka | 0:ebea15f18f84 | 23 | |
hlipka | 0:ebea15f18f84 | 24 | #include "NTPClient.h" |
hlipka | 1:63ded11b8fa2 | 25 | #include "dnsresolve.h" |
hlipka | 0:ebea15f18f84 | 26 | |
hlipka | 0:ebea15f18f84 | 27 | #include <stdio.h> |
hlipka | 0:ebea15f18f84 | 28 | |
hlipka | 0:ebea15f18f84 | 29 | //#define __DEBUG |
hlipka | 0:ebea15f18f84 | 30 | #include "dbg/dbg.h" |
hlipka | 0:ebea15f18f84 | 31 | |
hlipka | 0:ebea15f18f84 | 32 | #define NTP_PORT 123 |
hlipka | 0:ebea15f18f84 | 33 | #define NTP_CLIENT_PORT 0//50420 //Random port |
hlipka | 1:63ded11b8fa2 | 34 | #define NTP_REQUEST_TIMEOUT 5000 |
hlipka | 0:ebea15f18f84 | 35 | #define NTP_TIMESTAMP_DELTA 2208988800ull //Diff btw a UNIX timestamp (Starting Jan, 1st 1970) and a NTP timestamp (Starting Jan, 1st 1900) |
hlipka | 0:ebea15f18f84 | 36 | |
hlipka | 0:ebea15f18f84 | 37 | #define htons( x ) ( (( x << 8 ) & 0xFF00) | (( x >> 8 ) & 0x00FF) ) |
hlipka | 0:ebea15f18f84 | 38 | #define ntohs( x ) (htons(x)) |
hlipka | 0:ebea15f18f84 | 39 | |
hlipka | 0:ebea15f18f84 | 40 | #define htonl( x ) ( (( x << 24 ) & 0xFF000000) \ |
hlipka | 0:ebea15f18f84 | 41 | | (( x << 8 ) & 0x00FF0000) \ |
hlipka | 0:ebea15f18f84 | 42 | | (( x >> 8 ) & 0x0000FF00) \ |
hlipka | 0:ebea15f18f84 | 43 | | (( x >> 24 ) & 0x000000FF) ) |
hlipka | 0:ebea15f18f84 | 44 | #define ntohl( x ) (htonl(x)) |
hlipka | 0:ebea15f18f84 | 45 | |
hlipka | 0:ebea15f18f84 | 46 | NTPClient::NTPClient() : |
hlipka | 1:63ded11b8fa2 | 47 | _state(NTP_PING), |
hlipka | 1:63ded11b8fa2 | 48 | _timeout(NTP_REQUEST_TIMEOUT), |
hlipka | 1:63ded11b8fa2 | 49 | _closed(true), |
hlipka | 1:63ded11b8fa2 | 50 | _host(), |
hlipka | 1:63ded11b8fa2 | 51 | _blockingResult(NTP_PROCESSING) |
hlipka | 0:ebea15f18f84 | 52 | { |
hlipka | 1:63ded11b8fa2 | 53 | _watchdog=new Timer(); |
hlipka | 0:ebea15f18f84 | 54 | DBG("\r\nNew NTPClient %p\r\n",this); |
hlipka | 0:ebea15f18f84 | 55 | } |
hlipka | 0:ebea15f18f84 | 56 | |
hlipka | 0:ebea15f18f84 | 57 | NTPClient::~NTPClient() |
hlipka | 0:ebea15f18f84 | 58 | { |
hlipka | 0:ebea15f18f84 | 59 | close(); |
hlipka | 1:63ded11b8fa2 | 60 | delete _watchdog; |
hlipka | 0:ebea15f18f84 | 61 | } |
hlipka | 0:ebea15f18f84 | 62 | |
hlipka | 0:ebea15f18f84 | 63 | //High level setup functions |
hlipka | 0:ebea15f18f84 | 64 | NTPResult NTPClient::setTime(const Host& host) //Blocking |
hlipka | 0:ebea15f18f84 | 65 | { |
hlipka | 0:ebea15f18f84 | 66 | doSetTime(host); |
hlipka | 0:ebea15f18f84 | 67 | return blockingProcess(); |
hlipka | 0:ebea15f18f84 | 68 | } |
hlipka | 0:ebea15f18f84 | 69 | |
hlipka | 0:ebea15f18f84 | 70 | void NTPClient::doSetTime(const Host& host) |
hlipka | 0:ebea15f18f84 | 71 | { |
hlipka | 0:ebea15f18f84 | 72 | init(); |
hlipka | 0:ebea15f18f84 | 73 | resetTimeout(); |
hlipka | 1:63ded11b8fa2 | 74 | _host = host; |
hlipka | 1:63ded11b8fa2 | 75 | if(!_host.getPort()) |
hlipka | 0:ebea15f18f84 | 76 | { |
hlipka | 1:63ded11b8fa2 | 77 | _host.setPort(NTP_PORT); |
hlipka | 0:ebea15f18f84 | 78 | } |
hlipka | 1:63ded11b8fa2 | 79 | if(_host.getIp().isNull()) |
hlipka | 0:ebea15f18f84 | 80 | { |
hlipka | 1:63ded11b8fa2 | 81 | |
hlipka | 1:63ded11b8fa2 | 82 | DNSResolver *dr=new DNSResolver(); |
hlipka | 1:63ded11b8fa2 | 83 | IpAddr ad=dr->resolveName(host.getName()); |
hlipka | 1:63ded11b8fa2 | 84 | delete dr; |
hlipka | 1:63ded11b8fa2 | 85 | if (ad.isNull()) |
hlipka | 1:63ded11b8fa2 | 86 | { |
hlipka | 1:63ded11b8fa2 | 87 | onResult(NTP_DNS); |
hlipka | 1:63ded11b8fa2 | 88 | return; |
hlipka | 1:63ded11b8fa2 | 89 | } |
hlipka | 1:63ded11b8fa2 | 90 | _host.setIp(ad); |
hlipka | 0:ebea15f18f84 | 91 | } |
hlipka | 0:ebea15f18f84 | 92 | open(); |
hlipka | 0:ebea15f18f84 | 93 | } |
hlipka | 0:ebea15f18f84 | 94 | |
hlipka | 0:ebea15f18f84 | 95 | void NTPClient::close() |
hlipka | 0:ebea15f18f84 | 96 | { |
hlipka | 1:63ded11b8fa2 | 97 | if(_closed) |
hlipka | 0:ebea15f18f84 | 98 | return; |
hlipka | 1:63ded11b8fa2 | 99 | _closed = true; //Prevent recursive calling or calling on an object being destructed by someone else |
hlipka | 1:63ded11b8fa2 | 100 | _watchdog->stop(); |
hlipka | 1:63ded11b8fa2 | 101 | _pUDPSocket->resetOnEvent(); |
hlipka | 1:63ded11b8fa2 | 102 | _pUDPSocket->close(); |
hlipka | 1:63ded11b8fa2 | 103 | delete _pUDPSocket; |
hlipka | 0:ebea15f18f84 | 104 | } |
hlipka | 0:ebea15f18f84 | 105 | |
hlipka | 0:ebea15f18f84 | 106 | void NTPClient::init() //Create and setup socket if needed |
hlipka | 0:ebea15f18f84 | 107 | { |
hlipka | 1:63ded11b8fa2 | 108 | if(!_closed) //Already opened |
hlipka | 0:ebea15f18f84 | 109 | return; |
hlipka | 1:63ded11b8fa2 | 110 | _state = NTP_PING; |
hlipka | 1:63ded11b8fa2 | 111 | _pUDPSocket = new UDPSocket; |
hlipka | 1:63ded11b8fa2 | 112 | _pUDPSocket->setOnEvent(this, &NTPClient::onUDPSocketEvent); |
hlipka | 1:63ded11b8fa2 | 113 | _closed = false; |
hlipka | 0:ebea15f18f84 | 114 | DBG("NTPClient: Init OK\n"); |
hlipka | 0:ebea15f18f84 | 115 | } |
hlipka | 0:ebea15f18f84 | 116 | |
hlipka | 0:ebea15f18f84 | 117 | void NTPClient::open() |
hlipka | 0:ebea15f18f84 | 118 | { |
hlipka | 0:ebea15f18f84 | 119 | resetTimeout(); |
hlipka | 0:ebea15f18f84 | 120 | DBG("Opening connection\n"); |
hlipka | 1:63ded11b8fa2 | 121 | _state = NTP_PING; |
hlipka | 0:ebea15f18f84 | 122 | Host localhost(IpAddr(), NTP_CLIENT_PORT, "localhost"); //Any local address |
hlipka | 1:63ded11b8fa2 | 123 | _pUDPSocket->bind(localhost); |
hlipka | 0:ebea15f18f84 | 124 | if ((int)time(NULL) < 1280000000) set_time( 1280000000 ); //End of July 2010... just there to limit offset range |
hlipka | 0:ebea15f18f84 | 125 | |
hlipka | 0:ebea15f18f84 | 126 | process(); |
hlipka | 0:ebea15f18f84 | 127 | |
hlipka | 0:ebea15f18f84 | 128 | } |
hlipka | 0:ebea15f18f84 | 129 | |
hlipka | 0:ebea15f18f84 | 130 | #define MIN(a,b) ((a)<(b))?(a):(b) |
hlipka | 0:ebea15f18f84 | 131 | void NTPClient::process() //Main state-machine |
hlipka | 0:ebea15f18f84 | 132 | { |
hlipka | 0:ebea15f18f84 | 133 | int len; |
hlipka | 0:ebea15f18f84 | 134 | Host host; |
hlipka | 1:63ded11b8fa2 | 135 | switch(_state) |
hlipka | 0:ebea15f18f84 | 136 | { |
hlipka | 0:ebea15f18f84 | 137 | case NTP_PING: |
hlipka | 0:ebea15f18f84 | 138 | DBG("Ping\r\n"); |
hlipka | 0:ebea15f18f84 | 139 | //Prepare NTP Packet: |
hlipka | 1:63ded11b8fa2 | 140 | _pkt.li = 0; //Leap Indicator : No warning |
hlipka | 1:63ded11b8fa2 | 141 | _pkt.vn = 4; //Version Number : 4 |
hlipka | 1:63ded11b8fa2 | 142 | _pkt.mode = 3; //Client mode |
hlipka | 1:63ded11b8fa2 | 143 | _pkt.stratum = 0; //Not relevant here |
hlipka | 1:63ded11b8fa2 | 144 | _pkt.poll = 0; //Not significant as well |
hlipka | 1:63ded11b8fa2 | 145 | _pkt.precision = 0; //Neither this one is |
hlipka | 0:ebea15f18f84 | 146 | |
hlipka | 1:63ded11b8fa2 | 147 | _pkt.rootDelay = 0; //Or this one |
hlipka | 1:63ded11b8fa2 | 148 | _pkt.rootDispersion = 0; //Or that one |
hlipka | 1:63ded11b8fa2 | 149 | _pkt.refId = 0; //... |
hlipka | 0:ebea15f18f84 | 150 | |
hlipka | 1:63ded11b8fa2 | 151 | _pkt.refTm_s = 0; |
hlipka | 1:63ded11b8fa2 | 152 | _pkt.origTm_s = 0; |
hlipka | 1:63ded11b8fa2 | 153 | _pkt.rxTm_s = 0; |
hlipka | 1:63ded11b8fa2 | 154 | _pkt.txTm_s = htonl( NTP_TIMESTAMP_DELTA + time(NULL) ); //WARN: We are in LE format, network byte order is BE |
hlipka | 0:ebea15f18f84 | 155 | |
hlipka | 1:63ded11b8fa2 | 156 | _pkt.refTm_f = _pkt.origTm_f = _pkt.rxTm_f = _pkt.txTm_f = 0; |
hlipka | 0:ebea15f18f84 | 157 | |
hlipka | 0:ebea15f18f84 | 158 | #ifdef __DEBUG |
hlipka | 0:ebea15f18f84 | 159 | //Hex Dump: |
hlipka | 0:ebea15f18f84 | 160 | DBG("Dump Tx:\r\n"); |
hlipka | 0:ebea15f18f84 | 161 | for(int i = 0; i< sizeof(NTPPacket); i++) |
hlipka | 0:ebea15f18f84 | 162 | { |
hlipka | 1:63ded11b8fa2 | 163 | DBGL("%02x ", *((char*)&_pkt + i)); |
hlipka | 0:ebea15f18f84 | 164 | } |
hlipka | 0:ebea15f18f84 | 165 | DBGL("\r\n"); |
hlipka | 0:ebea15f18f84 | 166 | #endif |
hlipka | 0:ebea15f18f84 | 167 | |
hlipka | 1:63ded11b8fa2 | 168 | len = _pUDPSocket->sendto( (char*)&_pkt, sizeof(NTPPacket), &_host ); |
hlipka | 0:ebea15f18f84 | 169 | if(len < sizeof(NTPPacket)) |
hlipka | 0:ebea15f18f84 | 170 | { onResult(NTP_PRTCL); close(); return; } |
hlipka | 0:ebea15f18f84 | 171 | |
hlipka | 1:63ded11b8fa2 | 172 | _state = NTP_PONG; |
hlipka | 0:ebea15f18f84 | 173 | |
hlipka | 0:ebea15f18f84 | 174 | break; |
hlipka | 0:ebea15f18f84 | 175 | |
hlipka | 0:ebea15f18f84 | 176 | case NTP_PONG: |
hlipka | 0:ebea15f18f84 | 177 | DBG("Pong\r\n"); |
hlipka | 1:63ded11b8fa2 | 178 | while( len = _pUDPSocket->recvfrom( (char*)&_pkt, sizeof(NTPPacket), &host ) ) |
hlipka | 0:ebea15f18f84 | 179 | { |
hlipka | 0:ebea15f18f84 | 180 | if( len <= 0 ) |
hlipka | 0:ebea15f18f84 | 181 | break; |
hlipka | 1:63ded11b8fa2 | 182 | if( !host.getIp().isEq(_host.getIp()) ) |
hlipka | 0:ebea15f18f84 | 183 | continue; //Not our packet |
hlipka | 0:ebea15f18f84 | 184 | if( len > 0 ) |
hlipka | 0:ebea15f18f84 | 185 | break; |
hlipka | 0:ebea15f18f84 | 186 | } |
hlipka | 0:ebea15f18f84 | 187 | |
hlipka | 0:ebea15f18f84 | 188 | if(len == 0) |
hlipka | 0:ebea15f18f84 | 189 | return; //Wait for the next packet |
hlipka | 0:ebea15f18f84 | 190 | |
hlipka | 0:ebea15f18f84 | 191 | if(len < 0) |
hlipka | 0:ebea15f18f84 | 192 | { onResult(NTP_PRTCL); close(); return; } |
hlipka | 0:ebea15f18f84 | 193 | |
hlipka | 0:ebea15f18f84 | 194 | if(len < sizeof(NTPPacket)) //TODO: Accept chunks |
hlipka | 0:ebea15f18f84 | 195 | { onResult(NTP_PRTCL); close(); return; } |
hlipka | 0:ebea15f18f84 | 196 | |
hlipka | 0:ebea15f18f84 | 197 | #ifdef __DEBUG |
hlipka | 0:ebea15f18f84 | 198 | //Hex Dump: |
hlipka | 0:ebea15f18f84 | 199 | DBG("Dump Rx:\r\n"); |
hlipka | 0:ebea15f18f84 | 200 | for(int i = 0; i< sizeof(NTPPacket); i++) |
hlipka | 0:ebea15f18f84 | 201 | { |
hlipka | 1:63ded11b8fa2 | 202 | DBGL("%02x ", *((char*)&_pkt + i)); |
hlipka | 0:ebea15f18f84 | 203 | } |
hlipka | 0:ebea15f18f84 | 204 | DBGL("\r\n"); |
hlipka | 0:ebea15f18f84 | 205 | #endif |
hlipka | 0:ebea15f18f84 | 206 | |
hlipka | 1:63ded11b8fa2 | 207 | if( _pkt.stratum == 0) //Kiss of death message : Not good ! |
hlipka | 0:ebea15f18f84 | 208 | { |
hlipka | 0:ebea15f18f84 | 209 | onResult(NTP_PRTCL); close(); return; |
hlipka | 0:ebea15f18f84 | 210 | } |
hlipka | 0:ebea15f18f84 | 211 | |
hlipka | 0:ebea15f18f84 | 212 | //Correct Endianness |
hlipka | 1:63ded11b8fa2 | 213 | _pkt.refTm_s = ntohl( _pkt.refTm_s ); |
hlipka | 1:63ded11b8fa2 | 214 | _pkt.refTm_f = ntohl( _pkt.refTm_f ); |
hlipka | 1:63ded11b8fa2 | 215 | _pkt.origTm_s = ntohl( _pkt.origTm_s ); |
hlipka | 1:63ded11b8fa2 | 216 | _pkt.origTm_f = ntohl( _pkt.origTm_f ); |
hlipka | 1:63ded11b8fa2 | 217 | _pkt.rxTm_s = ntohl( _pkt.rxTm_s ); |
hlipka | 1:63ded11b8fa2 | 218 | _pkt.rxTm_f = ntohl( _pkt.rxTm_f ); |
hlipka | 1:63ded11b8fa2 | 219 | _pkt.txTm_s = ntohl( _pkt.txTm_s ); |
hlipka | 1:63ded11b8fa2 | 220 | _pkt.txTm_f = ntohl( _pkt.txTm_f ); |
hlipka | 0:ebea15f18f84 | 221 | |
hlipka | 0:ebea15f18f84 | 222 | //Compute offset, see RFC 4330 p.13 |
hlipka | 0:ebea15f18f84 | 223 | uint32_t destTm_s = (NTP_TIMESTAMP_DELTA + time(NULL)); |
hlipka | 1:63ded11b8fa2 | 224 | //int32_t origTm = (int32_t) ((uint64_t) _pkt.origTm - NTP_TIMESTAMP_DELTA); //Convert in local 32 bits timestamps |
hlipka | 1:63ded11b8fa2 | 225 | //int32_t rxTm = (int32_t) ((uint64_t) _pkt.rxTm - NTP_TIMESTAMP_DELTA); //Convert in local 32 bits timestamps |
hlipka | 1:63ded11b8fa2 | 226 | //int32_t txTm = (int32_t) ((uint64_t) _pkt.txTm - NTP_TIMESTAMP_DELTA); //Convert in local 32 bits timestamps |
hlipka | 1:63ded11b8fa2 | 227 | // int64_t offset = ( ( ( _pkt.rxT_s - m_pkt.origTm_s ) + ( m_pkt.txT_s - destTm_s ) ) << 32 + ( ( m_pkt.rxTm_f - m_pkt.origTm_f ) + ( m_pkt.txT_f - 0 ) ) ) / 2; |
hlipka | 1:63ded11b8fa2 | 228 | int64_t offset = ( (int64_t)( _pkt.rxTm_s - _pkt.origTm_s ) + (int64_t) ( _pkt.txTm_s - destTm_s ) ) / 2; //Avoid overflow |
hlipka | 1:63ded11b8fa2 | 229 | DBG("Sent @%d\r\n", _pkt.txTm_s); |
hlipka | 0:ebea15f18f84 | 230 | DBG("Offset: %d\r\n", offset); |
hlipka | 0:ebea15f18f84 | 231 | |
hlipka | 0:ebea15f18f84 | 232 | //Set time accordingly |
hlipka | 0:ebea15f18f84 | 233 | set_time( time(NULL) + (offset /*>> 32*/) ); |
hlipka | 0:ebea15f18f84 | 234 | |
hlipka | 0:ebea15f18f84 | 235 | onResult(NTP_OK); |
hlipka | 0:ebea15f18f84 | 236 | close(); |
hlipka | 0:ebea15f18f84 | 237 | break; |
hlipka | 0:ebea15f18f84 | 238 | } |
hlipka | 0:ebea15f18f84 | 239 | } |
hlipka | 0:ebea15f18f84 | 240 | |
hlipka | 0:ebea15f18f84 | 241 | void NTPClient::setTimeout(int ms) |
hlipka | 0:ebea15f18f84 | 242 | { |
hlipka | 1:63ded11b8fa2 | 243 | _timeout = ms; |
hlipka | 0:ebea15f18f84 | 244 | } |
hlipka | 0:ebea15f18f84 | 245 | |
hlipka | 0:ebea15f18f84 | 246 | void NTPClient::resetTimeout() |
hlipka | 0:ebea15f18f84 | 247 | { |
hlipka | 1:63ded11b8fa2 | 248 | _watchdog->reset(); |
hlipka | 1:63ded11b8fa2 | 249 | _watchdog->start(); |
hlipka | 0:ebea15f18f84 | 250 | } |
hlipka | 0:ebea15f18f84 | 251 | |
hlipka | 0:ebea15f18f84 | 252 | void NTPClient::onTimeout() //Connection has timed out |
hlipka | 0:ebea15f18f84 | 253 | { |
hlipka | 0:ebea15f18f84 | 254 | close(); |
hlipka | 0:ebea15f18f84 | 255 | onResult(NTP_TIMEOUT); |
hlipka | 0:ebea15f18f84 | 256 | } |
hlipka | 0:ebea15f18f84 | 257 | |
hlipka | 0:ebea15f18f84 | 258 | void NTPClient::onUDPSocketEvent(UDPSocketEvent e) |
hlipka | 0:ebea15f18f84 | 259 | { |
hlipka | 0:ebea15f18f84 | 260 | resetTimeout(); |
hlipka | 0:ebea15f18f84 | 261 | switch(e) |
hlipka | 0:ebea15f18f84 | 262 | { |
hlipka | 0:ebea15f18f84 | 263 | case UDPSOCKET_READABLE: //The only event for now |
hlipka | 0:ebea15f18f84 | 264 | process(); |
hlipka | 0:ebea15f18f84 | 265 | break; |
hlipka | 0:ebea15f18f84 | 266 | } |
hlipka | 0:ebea15f18f84 | 267 | } |
hlipka | 0:ebea15f18f84 | 268 | |
hlipka | 0:ebea15f18f84 | 269 | void NTPClient::onResult(NTPResult r) //Must be called by impl when the request completes |
hlipka | 0:ebea15f18f84 | 270 | { |
hlipka | 1:63ded11b8fa2 | 271 | _blockingResult = r; //Blocking mode |
hlipka | 0:ebea15f18f84 | 272 | } |
hlipka | 0:ebea15f18f84 | 273 | |
hlipka | 0:ebea15f18f84 | 274 | NTPResult NTPClient::blockingProcess() //Called in blocking mode, calls Net::poll() until return code is available |
hlipka | 0:ebea15f18f84 | 275 | { |
hlipka | 1:63ded11b8fa2 | 276 | _blockingResult = NTP_PROCESSING; |
hlipka | 0:ebea15f18f84 | 277 | do |
hlipka | 0:ebea15f18f84 | 278 | { |
hlipka | 0:ebea15f18f84 | 279 | Net::poll(); |
hlipka | 1:63ded11b8fa2 | 280 | wait_us(100); |
hlipka | 1:63ded11b8fa2 | 281 | if (_watchdog->read_ms()>_timeout) |
hlipka | 1:63ded11b8fa2 | 282 | return NTP_TIMEOUT; |
hlipka | 1:63ded11b8fa2 | 283 | } while(_blockingResult == NTP_PROCESSING); |
hlipka | 0:ebea15f18f84 | 284 | |
hlipka | 0:ebea15f18f84 | 285 | Net::poll(); //Necessary for cleanup |
hlipka | 0:ebea15f18f84 | 286 | |
hlipka | 1:63ded11b8fa2 | 287 | return _blockingResult; |
hlipka | 0:ebea15f18f84 | 288 | } |