Wraps the DNSRequest class from NetServices to be synchronous, which is easier to use.
Dependents: TwitPicExample SPIVFDclock RPC_mbed_client QRSS_Rx ... more
dnsresolve.h@2:097d4993dd1e, 2011-02-18 (annotated)
- Committer:
- hlipka
- Date:
- Fri Feb 18 13:58:54 2011 +0000
- Revision:
- 2:097d4993dd1e
- Parent:
- 1:3a3015287572
added license
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
hlipka | 2:097d4993dd1e | 1 | /* |
hlipka | 2:097d4993dd1e | 2 | * DNSResolver library |
hlipka | 2:097d4993dd1e | 3 | * Copyright (c) 2010 Hendrik Lipka |
hlipka | 2:097d4993dd1e | 4 | * |
hlipka | 2:097d4993dd1e | 5 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
hlipka | 2:097d4993dd1e | 6 | * of this software and associated documentation files (the "Software"), to deal |
hlipka | 2:097d4993dd1e | 7 | * in the Software without restriction, including without limitation the rights |
hlipka | 2:097d4993dd1e | 8 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
hlipka | 2:097d4993dd1e | 9 | * copies of the Software, and to permit persons to whom the Software is |
hlipka | 2:097d4993dd1e | 10 | * furnished to do so, subject to the following conditions: |
hlipka | 2:097d4993dd1e | 11 | * |
hlipka | 2:097d4993dd1e | 12 | * The above copyright notice and this permission notice shall be included in |
hlipka | 2:097d4993dd1e | 13 | * all copies or substantial portions of the Software. |
hlipka | 2:097d4993dd1e | 14 | * |
hlipka | 2:097d4993dd1e | 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
hlipka | 2:097d4993dd1e | 16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
hlipka | 2:097d4993dd1e | 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
hlipka | 2:097d4993dd1e | 18 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
hlipka | 2:097d4993dd1e | 19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
hlipka | 2:097d4993dd1e | 20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
hlipka | 2:097d4993dd1e | 21 | * THE SOFTWARE. |
hlipka | 2:097d4993dd1e | 22 | */ |
hlipka | 2:097d4993dd1e | 23 | |
hlipka | 2:097d4993dd1e | 24 | #ifndef __DNSRESOLVE_H__ |
hlipka | 2:097d4993dd1e | 25 | #define __DNSRESOLVE_H__ |
hlipka | 2:097d4993dd1e | 26 | |
hlipka | 2:097d4993dd1e | 27 | #include "Timer.h" |
hlipka | 2:097d4993dd1e | 28 | #include "wait_api.h" |
hlipka | 2:097d4993dd1e | 29 | |
hlipka | 2:097d4993dd1e | 30 | #include "DNSRequest.h" |
hlipka | 2:097d4993dd1e | 31 | |
hlipka | 2:097d4993dd1e | 32 | class DNSResolver { |
hlipka | 2:097d4993dd1e | 33 | public: |
hlipka | 2:097d4993dd1e | 34 | DNSResolver() { |
hlipka | 2:097d4993dd1e | 35 | _request=new DNSRequest(); |
hlipka | 2:097d4993dd1e | 36 | _request->setOnReply(this, &DNSResolver::onReply); |
hlipka | 2:097d4993dd1e | 37 | }; |
hlipka | 2:097d4993dd1e | 38 | |
hlipka | 2:097d4993dd1e | 39 | ~DNSResolver() { |
hlipka | 2:097d4993dd1e | 40 | delete _request; |
hlipka | 2:097d4993dd1e | 41 | }; |
hlipka | 2:097d4993dd1e | 42 | |
hlipka | 2:097d4993dd1e | 43 | IpAddr resolveName(const char* name) { |
hlipka | 2:097d4993dd1e | 44 | _completed=0; |
hlipka | 2:097d4993dd1e | 45 | IpAddr addr; |
hlipka | 2:097d4993dd1e | 46 | |
hlipka | 2:097d4993dd1e | 47 | DNSRequestErr r=_request->resolve(name); |
hlipka | 2:097d4993dd1e | 48 | if (0!=r) { |
hlipka | 2:097d4993dd1e | 49 | _request->close(); |
hlipka | 2:097d4993dd1e | 50 | return addr; |
hlipka | 2:097d4993dd1e | 51 | } |
hlipka | 2:097d4993dd1e | 52 | |
hlipka | 2:097d4993dd1e | 53 | mbed::Timer tmr; |
hlipka | 2:097d4993dd1e | 54 | tmr.start(); |
hlipka | 2:097d4993dd1e | 55 | while (0==_completed) { |
hlipka | 2:097d4993dd1e | 56 | Net::poll(); |
hlipka | 2:097d4993dd1e | 57 | if (tmr.read()>5) |
hlipka | 2:097d4993dd1e | 58 | break; |
hlipka | 2:097d4993dd1e | 59 | wait_us(100); |
hlipka | 2:097d4993dd1e | 60 | } |
hlipka | 2:097d4993dd1e | 61 | |
hlipka | 2:097d4993dd1e | 62 | if (-1==_completed) { |
hlipka | 2:097d4993dd1e | 63 | _request->close(); |
hlipka | 2:097d4993dd1e | 64 | return addr; |
hlipka | 2:097d4993dd1e | 65 | } |
hlipka | 2:097d4993dd1e | 66 | |
hlipka | 2:097d4993dd1e | 67 | _request->getResult(&addr); |
hlipka | 2:097d4993dd1e | 68 | _request->close(); |
hlipka | 2:097d4993dd1e | 69 | return addr; |
hlipka | 2:097d4993dd1e | 70 | }; |
hlipka | 2:097d4993dd1e | 71 | |
hlipka | 2:097d4993dd1e | 72 | void onReply(DNSReply reply) { |
hlipka | 2:097d4993dd1e | 73 | if (reply==DNS_FOUND) |
hlipka | 2:097d4993dd1e | 74 | _completed=1; |
hlipka | 2:097d4993dd1e | 75 | else |
hlipka | 2:097d4993dd1e | 76 | _completed=-1; |
hlipka | 2:097d4993dd1e | 77 | }; |
hlipka | 2:097d4993dd1e | 78 | |
hlipka | 2:097d4993dd1e | 79 | private: |
hlipka | 2:097d4993dd1e | 80 | DNSRequest *_request; |
hlipka | 2:097d4993dd1e | 81 | int _completed; // -1=err,0=running,1=ok |
hlipka | 2:097d4993dd1e | 82 | }; |
hlipka | 2:097d4993dd1e | 83 | |
hlipka | 2:097d4993dd1e | 84 | |
hlipka | 0:83c60912e03f | 85 | #endif |