dns-sd.h

00001 /*
00002     Edited by JB RYU, KOR - 2015
00003     
00004     DNS-headers and values.
00005     
00006     Actually, Defines for DNS-type-values are not necessary.
00007     LWIP NETIF has defines for DNS formats already.
00008 */
00009 
00010 #ifndef DNS_SD_H_
00011 #define DNS_SD_H_
00012 
00013 #include <cstdint>
00014 
00015 #ifdef __cplusplus
00016 extern "C" {
00017 #endif
00018 
00019 #define UPPERBYTE(word)\
00020     (unsigned char)(word >> 8)
00021 #define LOWERBYTE(word)\
00022     (unsigned char)(word)
00023 
00024 /** \internal The DNS message header. */
00025 #define DNS_FLAG1_RESPONSE        0x80
00026 #define DNS_FLAG1_OPCODE_STATUS   0x10
00027 #define DNS_FLAG1_OPCODE_INVERSE  0x08
00028 #define DNS_FLAG1_OPCODE_STANDARD 0x00
00029 #define DNS_FLAG1_AUTHORATIVE     0x04
00030 #define DNS_FLAG1_TRUNC           0x02
00031 #define DNS_FLAG1_RD              0x01
00032 #define DNS_FLAG2_RA              0x80
00033 #define DNS_FLAG2_ERR_MASK        0x0f
00034 #define DNS_FLAG2_ERR_NONE        0x00
00035 #define DNS_FLAG2_ERR_NAME        0x03
00036 
00037 /** \internal The DNS question message structure. */
00038 struct dns_question 
00039 {
00040   uint16_t type;
00041   uint16_t obj;
00042 };
00043 
00044 struct dns_hdr 
00045 {
00046   uint16_t id;
00047   uint8_t flags1, flags2;
00048   uint16_t numquestions;
00049   uint16_t numanswers;
00050   uint16_t numauthrr;
00051   uint16_t numextrarr;
00052 };
00053 
00054 /** \internal The DNS answer message structure. */
00055 struct dns_answer 
00056 {
00057   /* DNS answer record starts with either a domain name or a pointer
00058    * to a name already present somewhere in the packet. */
00059   uint16_t type;
00060   uint16_t obj;
00061   uint16_t ttl[2];
00062   uint16_t len;
00063 #if NET_IPV6
00064   uint8_t ipaddr[16];
00065 #else
00066   uint8_t ipaddr[4];
00067 #endif
00068 };
00069 
00070 #define DNS_TYPE_A      1
00071 #define DNS_TYPE_CNAME  5
00072 #define DNS_TYPE_PTR   12
00073 #define DNS_TYPE_MX    15
00074 #define DNS_TYPE_TXT   16
00075 #define DNS_TYPE_AAAA  28
00076 #define DNS_TYPE_SRV   33
00077 #define DNS_TYPE_ANY   255
00078 #define DNS_TYPE_NSEC  47
00079 
00080 #if NET_IPV6
00081 #define NATIVE_DNS_TYPE DNS_TYPE_AAAA /* IPv6 */
00082 #else
00083 #define NATIVE_DNS_TYPE DNS_TYPE_A    /* IPv4 */
00084 #endif
00085 
00086 #define DNS_CLASS_IN        0x0001
00087 #define DNS_CASH_FLUSH      0x8000
00088 #define DNS_CLASS_ANY       0z00ff
00089 
00090 /* all entities include its length */
00091 #define MAX_DOMAIN_LEN                  64
00092 #define MAX_INSTANCE_NAME_LEN       64
00093 #define MAX_SUBTYPE_NAME_LEN        69
00094 #define MAX_SERVICE_NAME_LEN        22
00095 #define MAX_SERVICE_DOMAIN_LEN  64
00096 #define MAX_PARENT_DOMAIN_LEN       100 //.local so...
00097 #define MDNS_P_DOMAIN_LEN               5
00098 
00099 #define PTR_QUERY_NAME_LEN      18
00100 #pragma pack (push, 1)
00101 typedef struct  
00102 {
00103   /* DNS answer record starts with either a domain name or a pointer
00104    * to a name already present somewhere in the packet. */
00105   uint16_t  type;
00106   uint16_t  obj;
00107   uint16_t  ttl[2];
00108   uint16_t  len;
00109     char            name[MAX_INSTANCE_NAME_LEN
00110         + MAX_SERVICE_NAME_LEN + MDNS_P_DOMAIN_LEN];
00111 }PTR_ANS;
00112 
00113 typedef struct
00114 {
00115     uint16_t    type;
00116   uint16_t  obj;
00117   uint16_t  ttl[2];
00118   uint16_t  len;    
00119     uint16_t    pri;
00120     uint16_t    wei;
00121     uint16_t    port;
00122     char        name[MAX_DOMAIN_LEN
00123         + MDNS_P_DOMAIN_LEN];
00124 }SRV_ANS;
00125 
00126 typedef struct
00127 {
00128     uint16_t    type;
00129   uint16_t  obj;
00130   uint16_t  ttl[2];
00131   uint16_t  len;    
00132     char            txt[1024];
00133 }TXT_ANS;
00134 
00135 typedef struct
00136 {
00137     uint8_t len_txtvers;
00138     char txtvers[10];
00139     uint8_t len_dcap;
00140     char dcap[10];
00141     uint8_t len_path;
00142     char path[10];
00143     uint8_t len_https;
00144     char https[10];
00145     uint8_t len_level;
00146     char level[10];
00147 }__SEP_TXT;
00148 
00149 typedef struct
00150 {
00151     uint8_t inst_len;
00152     char instance[63]; //RYU-PC
00153     uint8_t serv_len;
00154     char service[16]; //_http
00155     uint8_t trl_len;
00156     char trl[4];            //_tcp
00157     uint8_t domain_len;
00158     char domain[5]; //local
00159     __SEP_TXT txt;
00160 }__SD_DOMAIN;
00161 #pragma pack (pop)
00162 
00163 #define N_CONTIKI_SERVICES  1
00164 typedef struct
00165 {
00166     int numbers;
00167     __SD_DOMAIN elements[N_CONTIKI_SERVICES];
00168 }MY_SD_DOMAINS;
00169 
00170 typedef struct
00171 {
00172     int numbers;
00173     uint8_t reqs[10];
00174 }QR_MAP;
00175 
00176 #ifdef __cplusplus
00177 }
00178 #endif
00179 
00180 #endif
00181