Alias (CNAME) record 0x0C (12) Reverse-lookup (PTR) record 0x0F (15) Mail exchange (MX) record 0x21 (33) Service (SRV) record 0xFB (251) Incremental zone transfer (IXFR) record 0xFC (252) Standard zone transfer (AXFR) record ...
DNS请求 DNS请求与响应的格式是一致的,其整体分为Header、Question、Answer、Authority、Additional5部分,如下图所示: _Header Header部分是一定有的,长度固定为12个字节;其余4部分可能有也可能没有,并且长度也不一定,这个在Header部分中有指明。Header的结构如下: 下面说明一下各个字段的含义: ID:占16位。该值由发...
response_data, address = redirect_socket.recvfrom(1024)# 将114响应响应给客户client_socket = self.request[1] client_socket.sendto(response_data, self.client_address)classServer(socketserver.ThreadingMixIn, socketserver.UDPServer):passif__name__ =="__main__":# 一下ip需换成自己电脑的ipserver ...
DNS_HEADER *dns = NULL; struct QUESTION *qinfo = NULL; printf("Resolving %s" , host); s = socket(AF_INET , SOCK_DGRAM , IPPROTO_UDP); //UDP packet for DNS queries dest.sin_family = AF_INET; dest.sin_port = htons(53); dest.sin_addr.s_addr = inet_addr(dns_servers[0...
alias_name IN CNAME primary_canonical_name In this example, a computer named host-a.example.microsoft.com needs to function as both a Web server named “www.example.microsoft.com.”; and an FTP server named “ftp.example.microsoft.com.”; To achieve the intended use for naming this compute...
ALOGD("has alias name : %s \n",answers[i].rdata); else if(ntohs(answers[i].resource->type)== T_PTR) ALOGD("has domain name :%s \n",answers[i].rdata); } } fail: if(s > 0) close(s); return NULL; } u_char* ReadName(unsigned char* reader,unsigned char* buffer,int* ...
Alias (CNAME) record 0x0C (12) Reverse-lookup (PTR) record 0x0F (15) Mail exchange (MX) record 0x21 (33) Service (SRV) record 0xFB (251) Incremental zone transfer (IXFR) record 0xFC (252) Standard zone transfer (AXFR) record ...
Name alias (CNAME) This type of record creates an additional name for an existing Address or Reverse Address record. When a DNS client requests the IP address of a record of this type, it will get the IP of the record that the Name Alias points to instead. This kind of record can be...
Number of Alias records for a single Azure resource20 1If you need to increase these limits, contact Azure Support. Next steps To start using Azure DNS, learn how tocreate a DNS zoneandcreate DNS records. To migrate an existing DNS zone, learn how toimport and export a DNS zone file. ...
#define DNS_TYPE_CNAME 0x0005 //5 the canonical name for an alias #define DNS_PACKET_MAX_SIZE (sizeof(DNSHeader) + MAX_DOMAINNAME_LEN + DNS_TYPE_SIZE + DNS_CLASS_SIZE) struct DNSHeader USHORT usTransID; //标识符 USHORT usFlags; //各种标志位 ...