Yasushi TAUCHI / Mbed 2 deprecated temp_WebServer

Dependencies:   MSCUsbHost NetServices RPCInterface TextLCD mbed

NetServices/if/lwip/lwipNetDnsRequest.cpp@1:f2088fbce73f, 2012-08-22 (annotated)

Committer:
yueee_yt
Date:
Wed Aug 22 05:10:09 2012 +0000
Revision:
1:f2088fbce73f
Parent:
0:fd83f3540b1a 
???????LM35??????WebServer

Who changed what in which revision?

UserRevisionLine numberNew contents of line
yueee_yt 0:fd83f3540b1a 1
yueee_yt 0:fd83f3540b1a 2 /*
yueee_yt 0:fd83f3540b1a 3 Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com)
yueee_yt 0:fd83f3540b1a 4
yueee_yt 0:fd83f3540b1a 5 Permission is hereby granted, free of charge, to any person obtaining a copy
yueee_yt 0:fd83f3540b1a 6 of this software and associated documentation files (the "Software"), to deal
yueee_yt 0:fd83f3540b1a 7 in the Software without restriction, including without limitation the rights
yueee_yt 0:fd83f3540b1a 8 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
yueee_yt 0:fd83f3540b1a 9 copies of the Software, and to permit persons to whom the Software is
yueee_yt 0:fd83f3540b1a 10 furnished to do so, subject to the following conditions:
yueee_yt 0:fd83f3540b1a 11
yueee_yt 0:fd83f3540b1a 12 The above copyright notice and this permission notice shall be included in
yueee_yt 0:fd83f3540b1a 13 all copies or substantial portions of the Software.
yueee_yt 0:fd83f3540b1a 14
yueee_yt 0:fd83f3540b1a 15 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
yueee_yt 0:fd83f3540b1a 16 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
yueee_yt 0:fd83f3540b1a 17 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
yueee_yt 0:fd83f3540b1a 18 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
yueee_yt 0:fd83f3540b1a 19 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
yueee_yt 0:fd83f3540b1a 20 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
yueee_yt 0:fd83f3540b1a 21 THE SOFTWARE.
yueee_yt 0:fd83f3540b1a 22 */
yueee_yt 0:fd83f3540b1a 23
yueee_yt 0:fd83f3540b1a 24 #include "lwipNetDnsRequest.h"
yueee_yt 0:fd83f3540b1a 25 #include "lwip/err.h" //err_t, ERR_xxx
yueee_yt 0:fd83f3540b1a 26 #include "lwip/dns.h"
yueee_yt 0:fd83f3540b1a 27
yueee_yt 0:fd83f3540b1a 28 #include "netCfg.h"
yueee_yt 0:fd83f3540b1a 29 #if NET_LWIP_STACK
yueee_yt 0:fd83f3540b1a 30
yueee_yt 0:fd83f3540b1a 31 //#define __DEBUG
yueee_yt 0:fd83f3540b1a 32 #include "dbg/dbg.h"
yueee_yt 0:fd83f3540b1a 33
yueee_yt 0:fd83f3540b1a 34 LwipNetDnsRequest::LwipNetDnsRequest(const char* hostname) : NetDnsRequest(hostname), m_state(LWIPNETDNS_START), m_cbFired(false), m_closing(false)
yueee_yt 0:fd83f3540b1a 35 {
yueee_yt 0:fd83f3540b1a 36 DBG("New LwipNetDnsRequest %p\n", this);
yueee_yt 0:fd83f3540b1a 37 }
yueee_yt 0:fd83f3540b1a 38
yueee_yt 0:fd83f3540b1a 39 LwipNetDnsRequest::LwipNetDnsRequest(Host* pHost) : NetDnsRequest(pHost), m_state(LWIPNETDNS_START), m_cbFired(false), m_closing(false)
yueee_yt 0:fd83f3540b1a 40 {
yueee_yt 0:fd83f3540b1a 41 DBG("New LwipNetDnsRequest %p\n", this);
yueee_yt 0:fd83f3540b1a 42 }
yueee_yt 0:fd83f3540b1a 43
yueee_yt 0:fd83f3540b1a 44 LwipNetDnsRequest::~LwipNetDnsRequest()
yueee_yt 0:fd83f3540b1a 45 {
yueee_yt 0:fd83f3540b1a 46 DBG("LwipNetDnsRequest %p destroyed\n", this);
yueee_yt 0:fd83f3540b1a 47 }
yueee_yt 0:fd83f3540b1a 48
yueee_yt 0:fd83f3540b1a 49 /*
yueee_yt 0:fd83f3540b1a 50 Main useful function here (see lwip/dns.h):
yueee_yt 0:fd83f3540b1a 51 err_t dns_gethostbyname(const char *hostname, ip_addr_t *addr,
yueee_yt 0:fd83f3540b1a 52 dns_found_callback found, void *callback_arg);
yueee_yt 0:fd83f3540b1a 53 */
yueee_yt 0:fd83f3540b1a 54
yueee_yt 0:fd83f3540b1a 55 //Execute request & return OK if found, NOTFOUND or ERROR on error, or PROCESSING if the request has not completed yet
yueee_yt 0:fd83f3540b1a 56 void LwipNetDnsRequest::poll()
yueee_yt 0:fd83f3540b1a 57 {
yueee_yt 0:fd83f3540b1a 58 err_t err;
yueee_yt 0:fd83f3540b1a 59 switch(m_state)
yueee_yt 0:fd83f3540b1a 60 {
yueee_yt 0:fd83f3540b1a 61 case LWIPNETDNS_START: //First req, let's call dns_gethostbyname
yueee_yt 0:fd83f3540b1a 62 ip_addr_t ipStruct;
yueee_yt 0:fd83f3540b1a 63 err = dns_gethostbyname(m_hostname, &ipStruct, LwipNetDnsRequest::sFoundCb, (void*) this );
yueee_yt 0:fd83f3540b1a 64 if( err == ERR_OK )
yueee_yt 0:fd83f3540b1a 65 {
yueee_yt 0:fd83f3540b1a 66 m_ip = IpAddr(&ipStruct);
yueee_yt 0:fd83f3540b1a 67 m_state = LWIPNETDNS_OK;
yueee_yt 0:fd83f3540b1a 68 DBG("DNS: Ip found in cache.\n");
yueee_yt 0:fd83f3540b1a 69 }
yueee_yt 0:fd83f3540b1a 70 else if( err == ERR_INPROGRESS)
yueee_yt 0:fd83f3540b1a 71 {
yueee_yt 0:fd83f3540b1a 72 DBG("DNS: Processing.\n");
yueee_yt 0:fd83f3540b1a 73 m_state = LWIPNETDNS_PROCESSING;
yueee_yt 0:fd83f3540b1a 74 }
yueee_yt 0:fd83f3540b1a 75 else //Likely ERR_VAL
yueee_yt 0:fd83f3540b1a 76 {
yueee_yt 0:fd83f3540b1a 77 DBG("DNS: Error on init.\n");
yueee_yt 0:fd83f3540b1a 78 m_state = LWIPNETDNS_ERROR;
yueee_yt 0:fd83f3540b1a 79 }
yueee_yt 0:fd83f3540b1a 80 break;
yueee_yt 0:fd83f3540b1a 81 case LWIPNETDNS_PROCESSING:
yueee_yt 0:fd83f3540b1a 82 break; //Nothing to do, DNS is polled on interrupt
yueee_yt 0:fd83f3540b1a 83 case LWIPNETDNS_OK:
yueee_yt 0:fd83f3540b1a 84 if(!m_cbFired)
yueee_yt 0:fd83f3540b1a 85 {
yueee_yt 0:fd83f3540b1a 86 DBG("DNS: Ip found.\n");
yueee_yt 0:fd83f3540b1a 87 m_cbFired = true;
yueee_yt 0:fd83f3540b1a 88 onReply(NETDNS_FOUND); //Raise callback
yueee_yt 0:fd83f3540b1a 89 }
yueee_yt 0:fd83f3540b1a 90 break;
yueee_yt 0:fd83f3540b1a 91 case LWIPNETDNS_NOTFOUND:
yueee_yt 0:fd83f3540b1a 92 if(!m_cbFired)
yueee_yt 0:fd83f3540b1a 93 {
yueee_yt 0:fd83f3540b1a 94 DBG("DNS: could not be resolved.\n");
yueee_yt 0:fd83f3540b1a 95 m_cbFired = true;
yueee_yt 0:fd83f3540b1a 96 onReply(NETDNS_NOTFOUND); //Raise callback
yueee_yt 0:fd83f3540b1a 97 }
yueee_yt 0:fd83f3540b1a 98 break;
yueee_yt 0:fd83f3540b1a 99 case LWIPNETDNS_ERROR:
yueee_yt 0:fd83f3540b1a 100 default:
yueee_yt 0:fd83f3540b1a 101 if(!m_cbFired)
yueee_yt 0:fd83f3540b1a 102 {
yueee_yt 0:fd83f3540b1a 103 DBG("DNS: Error.\n");
yueee_yt 0:fd83f3540b1a 104 m_cbFired = true;
yueee_yt 0:fd83f3540b1a 105 onReply(NETDNS_ERROR); //Raise callback
yueee_yt 0:fd83f3540b1a 106 }
yueee_yt 0:fd83f3540b1a 107 break;
yueee_yt 0:fd83f3540b1a 108 }
yueee_yt 0:fd83f3540b1a 109 if(m_closing && (m_state!=LWIPNETDNS_PROCESSING)) //Check wether the closure has been reqd
yueee_yt 0:fd83f3540b1a 110 {
yueee_yt 0:fd83f3540b1a 111 DBG("LwipNetDnsRequest: Closing in poll()\n");
yueee_yt 0:fd83f3540b1a 112 NetDnsRequest::close();
yueee_yt 0:fd83f3540b1a 113 }
yueee_yt 0:fd83f3540b1a 114 }
yueee_yt 0:fd83f3540b1a 115
yueee_yt 0:fd83f3540b1a 116 void LwipNetDnsRequest::close()
yueee_yt 0:fd83f3540b1a 117 {
yueee_yt 0:fd83f3540b1a 118 DBG("LwipNetDnsRequest: Close req\n");
yueee_yt 0:fd83f3540b1a 119 if(m_state!=LWIPNETDNS_PROCESSING)
yueee_yt 0:fd83f3540b1a 120 {
yueee_yt 0:fd83f3540b1a 121 DBG("LwipNetDnsRequest: Closing in close()\n");
yueee_yt 0:fd83f3540b1a 122 NetDnsRequest::close();
yueee_yt 0:fd83f3540b1a 123 }
yueee_yt 0:fd83f3540b1a 124 else //Cannot close rightaway, waiting for callback from underlying layer
yueee_yt 0:fd83f3540b1a 125 {
yueee_yt 0:fd83f3540b1a 126 m_closing = true;
yueee_yt 0:fd83f3540b1a 127 }
yueee_yt 0:fd83f3540b1a 128 }
yueee_yt 0:fd83f3540b1a 129
yueee_yt 0:fd83f3540b1a 130 void LwipNetDnsRequest::foundCb(const char *name, ip_addr_t *ipaddr)
yueee_yt 0:fd83f3540b1a 131 {
yueee_yt 0:fd83f3540b1a 132 if( ipaddr == NULL )
yueee_yt 0:fd83f3540b1a 133 {
yueee_yt 0:fd83f3540b1a 134 DBG("LwipNetDnsRequest: Callback: Name not found\n");
yueee_yt 0:fd83f3540b1a 135 m_state = LWIPNETDNS_NOTFOUND;
yueee_yt 0:fd83f3540b1a 136 return;
yueee_yt 0:fd83f3540b1a 137 }
yueee_yt 0:fd83f3540b1a 138 DBG("LwipNetDnsRequest: Callback: Resolved\n");
yueee_yt 0:fd83f3540b1a 139 m_ip = IpAddr(ipaddr);
yueee_yt 0:fd83f3540b1a 140 m_state = LWIPNETDNS_OK;
yueee_yt 0:fd83f3540b1a 141 }
yueee_yt 0:fd83f3540b1a 142
yueee_yt 0:fd83f3540b1a 143
yueee_yt 0:fd83f3540b1a 144 void LwipNetDnsRequest::sFoundCb(const char *name, ip_addr_t *ipaddr, void *arg)
yueee_yt 0:fd83f3540b1a 145 {
yueee_yt 0:fd83f3540b1a 146 DBG("LwipNetDnsRequest: Static callback\n");
yueee_yt 0:fd83f3540b1a 147 LwipNetDnsRequest* pMe = (LwipNetDnsRequest*) arg;
yueee_yt 0:fd83f3540b1a 148 return pMe->foundCb( name, ipaddr );
yueee_yt 0:fd83f3540b1a 149 }
yueee_yt 0:fd83f3540b1a 150
yueee_yt 0:fd83f3540b1a 151 #endif
yueee_yt 0:fd83f3540b1a 152