/* number of bytes of fixed size data in resource record */
#define RRFIXEDSZ 10
-/*
- * Internet nameserver port number
- */
-#define NAMESERVER_PORT 53
-
-/*
- * Port for multicast DNS; see
- *
- * http://files.multicastdns.org/draft-cheshire-dnsext-multicastdns.txt
- *
- * for the current mDNS spec.
- */
-#define MULTICASTDNS_PORT 5353
-
/*
* Currently defined opcodes
*/
#define T_UID 101 /* user ID */
#define T_GID 102 /* group ID */
#define T_UNSPEC 103 /* Unspecified format (binary data) */
-#define T_UNSPECA 104 /* "unspecified ascii". Ugly MIT hack */
+#define T_UNSPECA 104 /* "unspecified ASCII". Ugly MIT hack */
/* Query type values which do not appear in resource records */
#define T_TKEY 249 /* Transaction Key [RFC2930] */
#define T_TSIG 250 /* Transaction Signature [RFC2845] */
#define T_MAILB 253 /* transfer mailbox records */
#define T_MAILA 254 /* transfer mail agent records */
#define T_ANY 255 /* wildcard match */
+#define T_URI 256 /* uri records [RFC7553] */
/*
* Values for class field
* Structure for query header.
*/
typedef struct {
- uint16_t id; /* query identification number */
- uint8_t flags1; /* first byte of flags */
- uint8_t flags2; /* second byte of flags */
- uint16_t qdcount; /* number of question entries */
- uint16_t ancount; /* number of answer entries */
- uint16_t nscount; /* number of authority entries */
- uint16_t arcount; /* number of resource entries */
-} HEADER;
+ nd_uint16_t id; /* query identification number */
+ nd_uint16_t flags; /* QR, Opcode, AA, TC, RD, RA, RCODE */
+ nd_uint16_t qdcount; /* number of question entries */
+ nd_uint16_t ancount; /* number of answer entries */
+ nd_uint16_t nscount; /* number of authority entries */
+ nd_uint16_t arcount; /* number of resource entries */
+} dns_header_t;
/*
* Macros for subfields of flag fields.
*/
-#define DNS_QR(np) ((np)->flags1 & 0x80) /* response flag */
-#define DNS_OPCODE(np) ((((np)->flags1) >> 3) & 0xF) /* purpose of message */
-#define DNS_AA(np) ((np)->flags1 & 0x04) /* authoritative answer */
-#define DNS_TC(np) ((np)->flags1 & 0x02) /* truncated message */
-#define DNS_RD(np) ((np)->flags1 & 0x01) /* recursion desired */
-
-#define DNS_RA(np) ((np)->flags2 & 0x80) /* recursion available */
-#define DNS_AD(np) ((np)->flags2 & 0x20) /* authentic data from named */
-#define DNS_CD(np) ((np)->flags2 & 0x10) /* checking disabled by resolver */
-#define DNS_RCODE(np) ((np)->flags2 & 0xF) /* response code */
+#define DNS_QR(flags) ((flags) & 0x8000) /* response flag */
+#define DNS_OPCODE(flags) (((flags) >> 11) & 0xF) /* purpose of message */
+#define DNS_AA(flags) (flags & 0x0400) /* authoritative answer */
+#define DNS_TC(flags) (flags & 0x0200) /* truncated message */
+#define DNS_RD(flags) (flags & 0x0100) /* recursion desired */
+#define DNS_RA(flags) (flags & 0x0080) /* recursion available */
+#define DNS_AD(flags) (flags & 0x0020) /* authentic data from named */
+#define DNS_CD(flags) (flags & 0x0010) /* checking disabled by resolver */
+#define DNS_RCODE(flags) (flags & 0x000F) /* response code */
/*
* Defines for handling compressed domain names, EDNS0 labels, etc.
#define EDNS0_MASK 0x40 /* 01.... */
# define EDNS0_ELT_BITLABEL 0x01
-/*
- * Structure for passing resource records around.
- */
-struct rrec {
- int16_t r_zone; /* zone number */
- int16_t r_class; /* class number */
- int16_t r_type; /* type number */
- uint32_t r_ttl; /* time to live */
- int r_size; /* size of data area */
- char *r_data; /* pointer to data */
-};
-
-/*
- * Inline versions of get/put short/long. Pointer is advanced.
- * We also assume that a "uint16_t" holds 2 "chars"
- * and that a "uint32_t" holds 4 "chars".
- *
- * These macros demonstrate the property of C whereby it can be
- * portable or it can be elegant but never both.
- */
-#define GETSHORT(s, cp) { \
- register u_char *t_cp = (u_char *)(cp); \
- (s) = ((uint16_t)t_cp[0] << 8) | (uint16_t)t_cp[1]; \
- (cp) += 2; \
-}
-
-#define GETLONG(l, cp) { \
- register u_char *t_cp = (u_char *)(cp); \
- (l) = (((uint32_t)t_cp[0]) << 24) \
- | (((uint32_t)t_cp[1]) << 16) \
- | (((uint32_t)t_cp[2]) << 8) \
- | (((uint32_t)t_cp[3])); \
- (cp) += 4; \
-}
-
-#define PUTSHORT(s, cp) { \
- register uint16_t t_s = (uint16_t)(s); \
- register u_char *t_cp = (u_char *)(cp); \
- *t_cp++ = t_s >> 8; \
- *t_cp = t_s; \
- (cp) += 2; \
-}
-
-/*
- * Warning: PUTLONG --no-longer-- destroys its first argument. if you
- * were depending on this "feature", you will lose.
- */
-#define PUTLONG(l, cp) { \
- register uint32_t t_l = (uint32_t)(l); \
- register u_char *t_cp = (u_char *)(cp); \
- *t_cp++ = t_l >> 24; \
- *t_cp++ = t_l >> 16; \
- *t_cp++ = t_l >> 8; \
- *t_cp = t_l; \
- (cp) += 4; \
-}
-
#endif /* !_NAMESER_H_ */
projects / tcpdump / blobdiff