Попытка получить srv запись

dnsTest.cpp

#include <winsock2.h>  //winsock
#include <windns.h>   //DNS api's
#include <stdio.h>    //standard i/o
#include <winerror.h>
#include <locale>
#include <clocale>

//Usage of the program
void Usage(char *progname) {
	fprintf(stderr,"Usage\n%s -n [HostName|IP Address] -t [Type]  -s [DnsServerIp]\n",progname);
	fprintf(stderr,"Where:\n\t\"HostName|IP Address\" is the name or IP address of the computer ");
	fprintf(stderr,"of the record set being queried\n");
	fprintf(stderr,"\t\"Type\" is the type of record set to be queried A or PTR\n");
	fprintf(stderr,"\t\"DnsServerIp\"is the IP address of DNS server (in dotted decimal notation) ");
	fprintf(stderr,"to which the query should be sent\n");
	exit(1);
}

void ReverseIP(char* pIP)
{
	char seps[]   = ".";
	char *token;
	char pIPSec[4][4];
	int i=0;
	token = strtok( pIP, seps);
	while( token != NULL )
	{
		/* While there are "." characters in "string" */
		sprintf(pIPSec[i],"%s", token);
		/* Get next "." character: */
		token = strtok( NULL, seps );
		i++;
	}
	sprintf(pIP,"%s.%s.%s.%s.%s", pIPSec[3],pIPSec[2],pIPSec[1],pIPSec[0],"IN-ADDR.ARPA");
}


//  the main function 
void __cdecl main(int argc, char *argv[])
{ 
	std::setlocale(LC_ALL, "");
	DNS_STATUS status;               //Return value of  DnsQuery_A() function.
	DNS_STATUS status2;               //Return value of  DnsQuery() function.
	PDNS_RECORD pDnsRecord;          //Pointer to DNS_RECORD structure.
	PDNS_RECORD pDnsRecord2;          //Pointer to DNS_RECORD structure.
	PIP4_ARRAY pSrvList = NULL;      //Pointer to IP4_ARRAY structure.
	WORD wType;                      //Type of the record to be queried.
	char* pOwnerName;        //Owner name to be queried.
	char pReversedIP[255];//Reversed IP address.
	char DnsServIp[255];             //DNS server ip address.
	DNS_FREE_TYPE freetype ;
	freetype =  DnsFreeRecordListDeep;
	IN_ADDR ipaddr;

	if(argc > 4) {
		for(int i = 1; i < argc ; i++) {
			if ( (argv[i][0] == '-') || (argv[i][0] == '/') ) {
				switch(tolower(argv[i][1])) {
				case 'n':
					pOwnerName=argv[++i];
					break;
				case 't':
					if (!stricmp(argv[i+1], "A") )
						wType = DNS_TYPE_A; //Query host records to resolve a name.
					else if (!stricmp(argv[i+1], "PTR") )
					{
						//pOwnerName should be in "xxx.xxx.xxx.xxx" format
						if(strlen(pOwnerName)<=15)
						{
							//You must reverse the IP address to request a Reverse Lookup 
							//of a host name.
							sprintf(pReversedIP,"%s",pOwnerName);
							ReverseIP(pReversedIP);
							pOwnerName=pReversedIP;
							wType = DNS_TYPE_PTR; //Query PTR records to resolve an IP address
						}
						else
						{
							Usage(argv[0]);
						}
					}
					else if (!stricmp(argv[i+1], "SRV") )
					{
						wType = DNS_TYPE_SRV; //Query SRV records to resolve 
					}
					else
						Usage(argv[0]);
					i++;
					break;

				case 's':
					// Allocate memory for IP4_ARRAY structure.
					pSrvList = (PIP4_ARRAY) LocalAlloc(LPTR,sizeof(IP4_ARRAY));
					if(!pSrvList){
						printf("Memory allocation failed \n");
						exit(1);
					}
					if(argv[++i]) {
						strcpy(DnsServIp,argv[i]);
						pSrvList->AddrCount = 1;
						pSrvList->AddrArray[0] = inet_addr(DnsServIp); //DNS server IP address
						break; 
					}

				default:
					Usage(argv[0]);
					break;
				}
			}
			else 
				Usage(argv[0]);     
		}   
	}
	else 
		Usage(argv[0]);

	// Calling function DnsQuery to query Host or PTR records   
	status = DnsQuery_A(pOwnerName,                 //Pointer to OwnerName. 
		wType,                      //Type of the record to be queried.
		DNS_QUERY_BYPASS_CACHE,     // Bypasses the resolver cache on the lookup. 
		pSrvList,                   //Contains DNS server IP address.
		&pDnsRecord,                //Resource record that contains the response.
		NULL);                     //Reserved for future use.

	if (status){
		if(wType == DNS_TYPE_A || wType == DNS_TYPE_SRV) 
			printf("Failed to query the host record for %s and the error is %d \n", pOwnerName, status);
		else
			printf("Failed to query the PTR record and the error is %d \n", status);
	} else {
		if(wType == DNS_TYPE_A) {
			//convert the Internet network address into a string
			//in Internet standard dotted format.
			ipaddr.S_un.S_addr = (pDnsRecord->Data.A.IpAddress);
			printf("The IP address of the host %s is %s \n", pOwnerName, inet_ntoa(ipaddr));

			// Free memory allocated for DNS records. 
			DnsRecordListFree(pDnsRecord, freetype);
		}
		else if (wType == DNS_TYPE_SRV)  {
			PCWSTR name = wcsdup(pDnsRecord->Data.SRV.pNameTarget);
			WORD port =  pDnsRecord->Data.SRV.wPort;
			printf("Address: %s;\nPort: %d\n", name, port);
			// Free memory allocated for DNS records. 
			DnsRecordListFree(pDnsRecord, freetype);
			// Calling function DnsQuery to query Host records   
			status2 = DnsQuery(name,                 //Pointer to OwnerName. 
				DNS_TYPE_A,                      //Type of the record to be queried.
				DNS_QUERY_BYPASS_CACHE,     // Bypasses the resolver cache on the lookup. 
				pSrvList,                   //Contains DNS server IP address.
				&pDnsRecord2,                //Resource record that contains the response.
				NULL);                     //Reserved for future use.
			if (status2) {
				printf("Failed to query the host record for %s and the error is %d \n", name, status2);
			}
			else {
				ipaddr.S_un.S_addr = (pDnsRecord2->Data.A.IpAddress);
				printf("The IP address of the host %s is %s \n", name, inet_ntoa(ipaddr));
				// Free memory allocated for DNS records. 
				DnsRecordListFree(pDnsRecord2, freetype);
			}

		}
		else {
			printf("The host name is %s  \n",(pDnsRecord->Data.PTR.pNameHost));
			// Free memory allocated for DNS records. 
			DnsRecordListFree(pDnsRecord, freetype);
		}
	}
	LocalFree(pSrvList);
}