Nino Der Kinderen / Mbed 2 deprecated InetTest

Embedded C project:18/12/2014

Dependencies:   DS1307 TextLCD mbed

NetServices/if/lwip/lwipNetDnsRequest.cpp@0:8d87bc453349, 2014-12-18 (annotated)

Committer:
ninoderkinderen
Date:
Thu Dec 18 09:35:49 2014 +0000
Revision:
0:8d87bc453349
Programma embedded C

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ninoderkinderen 0:8d87bc453349 1
ninoderkinderen 0:8d87bc453349 2 /*
ninoderkinderen 0:8d87bc453349 3 Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com)
ninoderkinderen 0:8d87bc453349 4
ninoderkinderen 0:8d87bc453349 5 Permission is hereby granted, free of charge, to any person obtaining a copy
ninoderkinderen 0:8d87bc453349 6 of this software and associated documentation files (the "Software"), to deal
ninoderkinderen 0:8d87bc453349 7 in the Software without restriction, including without limitation the rights
ninoderkinderen 0:8d87bc453349 8 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
ninoderkinderen 0:8d87bc453349 9 copies of the Software, and to permit persons to whom the Software is
ninoderkinderen 0:8d87bc453349 10 furnished to do so, subject to the following conditions:
ninoderkinderen 0:8d87bc453349 11
ninoderkinderen 0:8d87bc453349 12 The above copyright notice and this permission notice shall be included in
ninoderkinderen 0:8d87bc453349 13 all copies or substantial portions of the Software.
ninoderkinderen 0:8d87bc453349 14
ninoderkinderen 0:8d87bc453349 15 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
ninoderkinderen 0:8d87bc453349 16 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
ninoderkinderen 0:8d87bc453349 17 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
ninoderkinderen 0:8d87bc453349 18 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
ninoderkinderen 0:8d87bc453349 19 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
ninoderkinderen 0:8d87bc453349 20 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
ninoderkinderen 0:8d87bc453349 21 THE SOFTWARE.
ninoderkinderen 0:8d87bc453349 22 */
ninoderkinderen 0:8d87bc453349 23
ninoderkinderen 0:8d87bc453349 24 #include "lwipNetDnsRequest.h"
ninoderkinderen 0:8d87bc453349 25 #include "lwip/err.h" //err_t, ERR_xxx
ninoderkinderen 0:8d87bc453349 26 #include "lwip/dns.h"
ninoderkinderen 0:8d87bc453349 27
ninoderkinderen 0:8d87bc453349 28 #include "netCfg.h"
ninoderkinderen 0:8d87bc453349 29 #if NET_LWIP_STACK
ninoderkinderen 0:8d87bc453349 30
ninoderkinderen 0:8d87bc453349 31 //#define __DEBUG
ninoderkinderen 0:8d87bc453349 32 #include "dbg/dbg.h"
ninoderkinderen 0:8d87bc453349 33
ninoderkinderen 0:8d87bc453349 34 LwipNetDnsRequest::LwipNetDnsRequest(const char* hostname) : NetDnsRequest(hostname), m_state(LWIPNETDNS_START), m_cbFired(false), m_closing(false)
ninoderkinderen 0:8d87bc453349 35 {
ninoderkinderen 0:8d87bc453349 36 DBG("New LwipNetDnsRequest %p\n", this);
ninoderkinderen 0:8d87bc453349 37 }
ninoderkinderen 0:8d87bc453349 38
ninoderkinderen 0:8d87bc453349 39 LwipNetDnsRequest::LwipNetDnsRequest(Host* pHost) : NetDnsRequest(pHost), m_state(LWIPNETDNS_START), m_cbFired(false), m_closing(false)
ninoderkinderen 0:8d87bc453349 40 {
ninoderkinderen 0:8d87bc453349 41 DBG("New LwipNetDnsRequest %p\n", this);
ninoderkinderen 0:8d87bc453349 42 }
ninoderkinderen 0:8d87bc453349 43
ninoderkinderen 0:8d87bc453349 44 LwipNetDnsRequest::~LwipNetDnsRequest()
ninoderkinderen 0:8d87bc453349 45 {
ninoderkinderen 0:8d87bc453349 46 DBG("LwipNetDnsRequest %p destroyed\n", this);
ninoderkinderen 0:8d87bc453349 47 }
ninoderkinderen 0:8d87bc453349 48
ninoderkinderen 0:8d87bc453349 49 /*
ninoderkinderen 0:8d87bc453349 50 Main useful function here (see lwip/dns.h):
ninoderkinderen 0:8d87bc453349 51 err_t dns_gethostbyname(const char *hostname, ip_addr_t *addr,
ninoderkinderen 0:8d87bc453349 52 dns_found_callback found, void *callback_arg);
ninoderkinderen 0:8d87bc453349 53 */
ninoderkinderen 0:8d87bc453349 54
ninoderkinderen 0:8d87bc453349 55 //Execute request & return OK if found, NOTFOUND or ERROR on error, or PROCESSING if the request has not completed yet
ninoderkinderen 0:8d87bc453349 56 void LwipNetDnsRequest::poll()
ninoderkinderen 0:8d87bc453349 57 {
ninoderkinderen 0:8d87bc453349 58 err_t err;
ninoderkinderen 0:8d87bc453349 59 switch(m_state)
ninoderkinderen 0:8d87bc453349 60 {
ninoderkinderen 0:8d87bc453349 61 case LWIPNETDNS_START: //First req, let's call dns_gethostbyname
ninoderkinderen 0:8d87bc453349 62 ip_addr_t ipStruct;
ninoderkinderen 0:8d87bc453349 63 err = dns_gethostbyname(m_hostname, &ipStruct, LwipNetDnsRequest::sFoundCb, (void*) this );
ninoderkinderen 0:8d87bc453349 64 if( err == ERR_OK )
ninoderkinderen 0:8d87bc453349 65 {
ninoderkinderen 0:8d87bc453349 66 m_ip = IpAddr(&ipStruct);
ninoderkinderen 0:8d87bc453349 67 m_state = LWIPNETDNS_OK;
ninoderkinderen 0:8d87bc453349 68 DBG("DNS: Ip found in cache.\n");
ninoderkinderen 0:8d87bc453349 69 }
ninoderkinderen 0:8d87bc453349 70 else if( err == ERR_INPROGRESS)
ninoderkinderen 0:8d87bc453349 71 {
ninoderkinderen 0:8d87bc453349 72 DBG("DNS: Processing.\n");
ninoderkinderen 0:8d87bc453349 73 m_state = LWIPNETDNS_PROCESSING;
ninoderkinderen 0:8d87bc453349 74 }
ninoderkinderen 0:8d87bc453349 75 else //Likely ERR_VAL
ninoderkinderen 0:8d87bc453349 76 {
ninoderkinderen 0:8d87bc453349 77 DBG("DNS: Error on init.\n");
ninoderkinderen 0:8d87bc453349 78 m_state = LWIPNETDNS_ERROR;
ninoderkinderen 0:8d87bc453349 79 }
ninoderkinderen 0:8d87bc453349 80 break;
ninoderkinderen 0:8d87bc453349 81 case LWIPNETDNS_PROCESSING:
ninoderkinderen 0:8d87bc453349 82 break; //Nothing to do, DNS is polled on interrupt
ninoderkinderen 0:8d87bc453349 83 case LWIPNETDNS_OK:
ninoderkinderen 0:8d87bc453349 84 if(!m_cbFired)
ninoderkinderen 0:8d87bc453349 85 {
ninoderkinderen 0:8d87bc453349 86 DBG("DNS: Ip found.\n");
ninoderkinderen 0:8d87bc453349 87 m_cbFired = true;
ninoderkinderen 0:8d87bc453349 88 onReply(NETDNS_FOUND); //Raise callback
ninoderkinderen 0:8d87bc453349 89 }
ninoderkinderen 0:8d87bc453349 90 break;
ninoderkinderen 0:8d87bc453349 91 case LWIPNETDNS_NOTFOUND:
ninoderkinderen 0:8d87bc453349 92 if(!m_cbFired)
ninoderkinderen 0:8d87bc453349 93 {
ninoderkinderen 0:8d87bc453349 94 DBG("DNS: could not be resolved.\n");
ninoderkinderen 0:8d87bc453349 95 m_cbFired = true;
ninoderkinderen 0:8d87bc453349 96 onReply(NETDNS_NOTFOUND); //Raise callback
ninoderkinderen 0:8d87bc453349 97 }
ninoderkinderen 0:8d87bc453349 98 break;
ninoderkinderen 0:8d87bc453349 99 case LWIPNETDNS_ERROR:
ninoderkinderen 0:8d87bc453349 100 default:
ninoderkinderen 0:8d87bc453349 101 if(!m_cbFired)
ninoderkinderen 0:8d87bc453349 102 {
ninoderkinderen 0:8d87bc453349 103 DBG("DNS: Error.\n");
ninoderkinderen 0:8d87bc453349 104 m_cbFired = true;
ninoderkinderen 0:8d87bc453349 105 onReply(NETDNS_ERROR); //Raise callback
ninoderkinderen 0:8d87bc453349 106 }
ninoderkinderen 0:8d87bc453349 107 break;
ninoderkinderen 0:8d87bc453349 108 }
ninoderkinderen 0:8d87bc453349 109 if(m_closing && (m_state!=LWIPNETDNS_PROCESSING)) //Check wether the closure has been reqd
ninoderkinderen 0:8d87bc453349 110 {
ninoderkinderen 0:8d87bc453349 111 DBG("LwipNetDnsRequest: Closing in poll()\n");
ninoderkinderen 0:8d87bc453349 112 NetDnsRequest::close();
ninoderkinderen 0:8d87bc453349 113 }
ninoderkinderen 0:8d87bc453349 114 }
ninoderkinderen 0:8d87bc453349 115
ninoderkinderen 0:8d87bc453349 116 void LwipNetDnsRequest::close()
ninoderkinderen 0:8d87bc453349 117 {
ninoderkinderen 0:8d87bc453349 118 DBG("LwipNetDnsRequest: Close req\n");
ninoderkinderen 0:8d87bc453349 119 if(m_state!=LWIPNETDNS_PROCESSING)
ninoderkinderen 0:8d87bc453349 120 {
ninoderkinderen 0:8d87bc453349 121 DBG("LwipNetDnsRequest: Closing in close()\n");
ninoderkinderen 0:8d87bc453349 122 NetDnsRequest::close();
ninoderkinderen 0:8d87bc453349 123 }
ninoderkinderen 0:8d87bc453349 124 else //Cannot close rightaway, waiting for callback from underlying layer
ninoderkinderen 0:8d87bc453349 125 {
ninoderkinderen 0:8d87bc453349 126 m_closing = true;
ninoderkinderen 0:8d87bc453349 127 }
ninoderkinderen 0:8d87bc453349 128 }
ninoderkinderen 0:8d87bc453349 129
ninoderkinderen 0:8d87bc453349 130 void LwipNetDnsRequest::foundCb(const char *name, ip_addr_t *ipaddr)
ninoderkinderen 0:8d87bc453349 131 {
ninoderkinderen 0:8d87bc453349 132 if( ipaddr == NULL )
ninoderkinderen 0:8d87bc453349 133 {
ninoderkinderen 0:8d87bc453349 134 DBG("LwipNetDnsRequest: Callback: Name not found\n");
ninoderkinderen 0:8d87bc453349 135 m_state = LWIPNETDNS_NOTFOUND;
ninoderkinderen 0:8d87bc453349 136 return;
ninoderkinderen 0:8d87bc453349 137 }
ninoderkinderen 0:8d87bc453349 138 DBG("LwipNetDnsRequest: Callback: Resolved\n");
ninoderkinderen 0:8d87bc453349 139 m_ip = IpAddr(ipaddr);
ninoderkinderen 0:8d87bc453349 140 m_state = LWIPNETDNS_OK;
ninoderkinderen 0:8d87bc453349 141 }
ninoderkinderen 0:8d87bc453349 142
ninoderkinderen 0:8d87bc453349 143
ninoderkinderen 0:8d87bc453349 144 void LwipNetDnsRequest::sFoundCb(const char *name, ip_addr_t *ipaddr, void *arg)
ninoderkinderen 0:8d87bc453349 145 {
ninoderkinderen 0:8d87bc453349 146 DBG("LwipNetDnsRequest: Static callback\n");
ninoderkinderen 0:8d87bc453349 147 LwipNetDnsRequest* pMe = (LwipNetDnsRequest*) arg;
ninoderkinderen 0:8d87bc453349 148 return pMe->foundCb( name, ipaddr );
ninoderkinderen 0:8d87bc453349 149 }
ninoderkinderen 0:8d87bc453349 150
ninoderkinderen 0:8d87bc453349 151 #endif
ninoderkinderen 0:8d87bc453349 152