hyung-hwan/hio
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

added some code to implement dns packet parser

Browse Source
This commit is contained in:
hyung-hwan
2020-02-13 09:31:02 +00:00
parent 192e64b65c
commit 4e6a1b7d85
4 changed files with 420 additions and 207 deletions
Download Patch File Download Diff File Expand all files Collapse all files

177
mio/lib/mio-dns.h
View File

@ -55,6 +55,10 @@ enum mio_dns_rcode_t
MIO_DNS_RCODE_NXRRSET = 8, /* RR set exists when it should not */
MIO_DNS_RCODE_NOTAUTH = 9, /* not authorized or server not authoritative for zone*/
MIO_DNS_RCODE_NOTZONE = 10, /* name not contained in zone */
/* the standard rcode field is 4 bit long. so the max is 15. */
/* items belows require EDNS0 */
MIO_DNS_RCODE_BADVERS = 16,
MIO_DNS_RCODE_BADSIG = 17,
MIO_DNS_RCODE_BADTIME = 18,
@ -66,35 +70,64 @@ enum mio_dns_rcode_t
};
typedef enum mio_dns_rcode_t mio_dns_rcode_t;
enum mio_dns_qtype_t
{
MIO_DNS_QTYPE_A = 1,
MIO_DNS_QTYPE_NS = 2,
MIO_DNS_QTYPE_CNAME = 5,
MIO_DNS_QTYPE_SOA = 6,
MIO_DNS_QTYPE_NULL = 10,
MIO_DNS_QTYPE_PTR = 12,
MIO_DNS_QTYPE_MX = 15,
MIO_DNS_QTYPE_TXT = 16,
MIO_DNS_QTYPE_AAAA = 28,
MIO_DNS_QTYPE_EID = 31,
MIO_DNS_QTYPE_SRV = 33,
MIO_DNS_QTYPE_OPT = 41,
MIO_DNS_QTYPE_RRSIG = 46,
MIO_DNS_QTYPE_AFXR = 252, /* entire zone transfer */
MIO_DNS_QTYPE_ANY = 255
};
typedef enum mio_dns_qtype_t mio_dns_qtype_t;
enum mio_dns_qclass_t
enum mio_dns_rrt_t
{
MIO_DNS_QCLASS_IN = 1, /* internet */
MIO_DNS_QCLASS_CH = 3, /* chaos */
MIO_DNS_QCLASS_HS = 4, /* hesiod */
MIO_DNS_QCLASS_NONE = 254,
MIO_DNS_QCLASS_ANY = 255
/*
* [RFC1035]
* TYPE fields are used in resource records. Note that these types are a
* subset of QTYPEs.
*/
MIO_DNS_RRT_A = 1,
MIO_DNS_RRT_NS = 2,
MIO_DNS_RRT_CNAME = 5,
MIO_DNS_RRT_SOA = 6,
MIO_DNS_RRT_NULL = 10,
MIO_DNS_RRT_PTR = 12,
MIO_DNS_RRT_MX = 15,
MIO_DNS_RRT_TXT = 16,
MIO_DNS_RRT_AAAA = 28,
MIO_DNS_RRT_EID = 31,
MIO_DNS_RRT_SRV = 33,
MIO_DNS_RRT_OPT = 41,
MIO_DNS_RRT_RRSIG = 46,
/*
* [RFC1035]
* QTYPE fields appear in the question part of a query. QTYPES are a
* superset of TYPEs, hence all TYPEs are valid QTYPEs. In addition, the
* following QTYPEs are defined:
*/
MIO_DNS_RRT_Q_AFXR = 252, /* A request for a transfer of an entire zone */
MIO_DNS_RRT_Q_MAILB = 253, /* A request for mailbox-related records (MB, MG or MR) */
MIO_DNS_RRT_Q_MAILA = 254, /* A request for mail agent RRs (Obsolete - see MX) */
MIO_DNS_RRT_Q_ANY = 255 /* A request for all records */
};
typedef enum mio_dns_qclass_t mio_dns_qclass_t;
typedef enum mio_dns_rrt_t mio_dns_rrt_t;
/*
* CLASS fields appear in resource records. The following CLASS mnemonics
* and values are defined:
*/
enum mio_dns_rrc_t
{
MIO_DNS_RRC_IN = 1, /* internet */
MIO_DNS_RRC_CH = 3, /* chaos */
MIO_DNS_RRC_HS = 4, /* Hesiod [Dyer 87] */
MIO_DNS_RRC_NONE = 254,
/*
*
* QCLASS fields appear in the question section of a query. QCLASS values
* are a superset of CLASS values; every CLASS is a valid QCLASS. In
* addition to CLASS values, the following QCLASSes are defined:
*/
MIO_DNS_RRC_Q_ANY = 255
};
typedef enum mio_dns_rrc_t mio_dns_rrc_t;
enum mio_dns_eopt_code_t
{
@ -188,8 +221,8 @@ typedef struct mio_dns_qrtr_t mio_dns_qrtr_t;
struct mio_dns_rrtr_t
{
/* qname upto 64 bytes */
mio_uint16_t qtype;
mio_uint16_t qclass;
mio_uint16_t rrtype;
mio_uint16_t rrclass;
mio_uint32_t ttl;
mio_uint16_t dlen; /* data length */
/* actual data if if dlen > 0 */
@ -214,8 +247,8 @@ typedef struct mio_dns_eopt_t mio_dns_eopt_t;
(((rd) & 0x01) << 8) | (((ra) & 0x01) << 7) | (((ad) & 0x01) << 5) | (((cd) & 0x01) << 4) | ((rcode) & 0x0F))
*/
/* breakdown of the dns message id and flags */
struct mio_dns_bdns_t
/* breakdown of the dns message id and flags. it excludes rr count fields.*/
struct mio_dns_bhdr_t
{
int id; /* auto-assign if negative. */
@ -230,7 +263,7 @@ struct mio_dns_bdns_t
mio_uint8_t cd; /* checking disabled - dnssec */
mio_uint8_t rcode; /* reply code - for reply only */
};
typedef struct mio_dns_bdns_t mio_dns_bdns_t;
typedef struct mio_dns_bhdr_t mio_dns_bhdr_t;
/* breakdown of question record */
struct mio_dns_bqr_t
@ -254,9 +287,9 @@ typedef enum mio_dns_rr_part_t mio_dns_rr_part_t;
struct mio_dns_brr_t
{
mio_dns_rr_part_t part;
mio_bch_t* qname;
mio_uint16_t qtype;
mio_uint16_t qclass;
mio_bch_t* rrname;
mio_uint16_t rrtype;
mio_uint16_t rrclass;
mio_uint32_t ttl;
mio_uint16_t dlen;
void* dptr;
@ -326,8 +359,9 @@ typedef struct mio_dns_bedns_t mio_dns_bedns_t;
/* ---------------------------------------------------------------- */
typedef struct mio_svc_dns_t mio_svc_dns_t;
typedef struct mio_svc_dnc_t mio_svc_dnc_t;
typedef struct mio_svc_dns_t mio_svc_dns_t; /* server service */
typedef struct mio_svc_dnc_t mio_svc_dnc_t; /* client service */
typedef struct mio_svc_dnr_t mio_svc_dnr_t; /* recursor service */
typedef void (*mio_svc_dnc_on_reply_t) (
mio_svc_dnc_t* dnc,
@ -337,6 +371,53 @@ typedef void (*mio_svc_dnc_on_reply_t) (
mio_oow_t len
);
#define mio_svc_dns_getmio(svc) mio_svc_getmio(svc)
#define mio_svc_dnc_getmio(svc) mio_svc_getmio(svc)
#define mio_svc_dnr_getmio(svc) mio_svc_getmio(svc)
/* ---------------------------------------------------------------- */
struct mio_dns_pkt_info_t
{
mio_uint8_t* start;
mio_uint8_t* end;
mio_uint8_t* ptr;
mio_oow_t rrdlen; /* length needed to store RRs decoded */
mio_uint8_t* rrdptr;
/* data information composed */
mio_dns_bhdr_t hdr;
struct
{
int exist;
mio_uint16_t uplen; /* udp payload len - will be placed in the qclass field of RR. */
mio_uint8_t version;
mio_uint8_t dnssecok;
} edns;
mio_uint16_t qdcount; /* number of questions */
mio_uint16_t ancount; /* number of answers (answer part) */
mio_uint16_t nscount; /* number of name servers (authority part. only NS types) */
mio_uint16_t arcount; /* number of additional resource (additional part) */
struct
{
mio_dns_bqr_t* qd;
mio_dns_brr_t* an;
mio_dns_brr_t* ns;
mio_dns_brr_t* ar;
} rr;
};
typedef struct mio_dns_pkt_info_t mio_dns_pkt_info_t;
/* ---------------------------------------------------------------- */
#if defined(__cplusplus)
extern "C" {
#endif
@ -351,7 +432,7 @@ MIO_EXPORT void mio_svc_dnc_stop (
MIO_EXPORT int mio_svc_dnc_sendreq (
mio_svc_dnc_t* dnc,
mio_dns_bdns_t* bdns,
mio_dns_bhdr_t* bdns,
mio_dns_bqr_t* qr,
mio_oow_t qr_count,
mio_dns_bedns_t* edns,
@ -360,7 +441,7 @@ MIO_EXPORT int mio_svc_dnc_sendreq (
MIO_EXPORT int mio_svc_dnc_sendmsg (
mio_svc_dnc_t* dnc,
mio_dns_bdns_t* bdns,
mio_dns_bhdr_t* bdns,
mio_dns_bqr_t* qr,
mio_oow_t qr_count,
mio_dns_brr_t* rr,
@ -372,17 +453,25 @@ MIO_EXPORT int mio_svc_dnc_sendmsg (
MIO_EXPORT int mio_svc_dnc_resolve (
mio_svc_dnc_t* dnc,
const mio_bch_t* qname,
mio_dns_qtype_t qtype,
mio_dns_rrt_t qtype,
mio_svc_dnc_on_reply_t on_reply
);
MIO_EXPORT int mio_dns_parse_packet (
mio_svc_dnc_t* dnc,
mio_dns_pkt_t* pkt,
mio_oow_t len,
mio_dns_bdns_t* bdns
/* ---------------------------------------------------------------- */
MIO_EXPORT mio_dns_pkt_info_t* mio_dns_make_packet_info (
mio_t* mio,
const mio_dns_pkt_t* pkt,
mio_oow_t len
);
MIO_EXPORT void mio_dns_free_packet_info (
mio_t* mio,
mio_dns_pkt_info_t* pi
);
#if defined(__cplusplus)
}
#endif