diff options
Diffstat (limited to 'src/libmowgli/dns/evloop_reslib.h')
| -rw-r--r-- | src/libmowgli/dns/evloop_reslib.h | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/src/libmowgli/dns/evloop_reslib.h b/src/libmowgli/dns/evloop_reslib.h new file mode 100644 index 0000000..0555eab --- /dev/null +++ b/src/libmowgli/dns/evloop_reslib.h @@ -0,0 +1,115 @@ +/* + * dns/reslib.h + * + * $Id: reslib.h 446 2006-02-12 02:46:54Z db $ + */ + +#ifndef __MOWGLI_DNS_RESLIB_H__ +#define __MOWGLI_DNS_RESLIB_H__ + +/* Here we define some values lifted from nameser.h */ +#define MOWGLI_DNS_NS_NOTIFY_OP 4 +#define MOWGLI_DNS_NS_INT16SIZE 2 +#define MOWGLI_DNS_NS_IN6ADDRSIZE 16 +#define MOWGLI_DNS_NS_INADDRSIZE 4 +#define MOWGLI_DNS_NS_INT32SIZE 4 +#define MOWGLI_DNS_NS_CMPRSFLAGS 0xc0 +#define MOWGLI_DNS_NS_MAXCDNAME 255 +#define MOWGLI_DNS_QUERY 0 +#define MOWGLI_DNS_IQUERY 1 +#define MOWGLI_DNS_NO_ERRORS 0 +#define MOWGLI_DNS_SERVFAIL 2 +#define MOWGLI_DNS_NXDOMAIN 3 +#define MOWGLI_DNS_C_IN 1 +#define MOWGLI_DNS_QFIXEDSIZE 4 +#define MOWGLI_DNS_RRFIXEDSIZE 10 +#define MOWGLI_DNS_HFIXEDSIZE 12 + +typedef struct +{ + unsigned id : 16; /* query identification number */ +#ifdef WORDS_BIGENDIAN + + /* fields in third byte */ + unsigned qr : 1;/* response flag */ + unsigned opcode : 4; /* purpose of message */ + unsigned aa : 1;/* authoritive answer */ + unsigned tc : 1;/* truncated message */ + unsigned rd : 1;/* recursion desired */ + /* fields in fourth byte */ + unsigned ra : 1;/* recursion available */ + unsigned unused : 1; /* unused bits (MBZ as of 4.9.3a3) */ + unsigned ad : 1;/* authentic data from named */ + unsigned cd : 1;/* checking disabled by resolver */ + unsigned rcode : 4; /* response code */ +#else + + /* fields in third byte */ + unsigned rd : 1;/* recursion desired */ + unsigned tc : 1;/* truncated message */ + unsigned aa : 1;/* authoritive answer */ + unsigned opcode : 4; /* purpose of message */ + unsigned qr : 1;/* response flag */ + /* fields in fourth byte */ + unsigned rcode : 4; /* response code */ + unsigned cd : 1;/* checking disabled by resolver */ + unsigned ad : 1;/* authentic data from named */ + unsigned unused : 1; /* unused bits (MBZ as of 4.9.3a3) */ + unsigned ra : 1;/* recursion available */ +#endif + + /* remaining bytes */ + unsigned qdcount : 16; /* number of question entries */ + unsigned ancount : 16; /* number of answer entries */ + unsigned nscount : 16; /* number of authority entries */ + unsigned arcount : 16; /* number of resource entries */ +} mowgli_dns_resheader_t; + +/* + * Inline versions of get/put short/long. Pointer is advanced. + */ +#define MOWGLI_DNS_NS_GET16(s, cp) { \ + const unsigned char *t_cp = (const unsigned char *) (cp); \ + (s) = ((uint16_t) t_cp[0] << 8) \ + | ((uint16_t) t_cp[1]) \ + ; \ + (cp) += MOWGLI_DNS_NS_INT16SIZE; \ +} + +#define MOWGLI_DNS_NS_GET32(l, cp) { \ + const unsigned char *t_cp = (const unsigned 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) += MOWGLI_DNS_NS_INT32SIZE; \ +} + +#define MOWGLI_DNS_NS_PUT16(s, cp) { \ + uint16_t t_s = (uint16_t) (s); \ + unsigned char *t_cp = (unsigned char *) (cp); \ + *t_cp++ = t_s >> 8; \ + *t_cp = t_s; \ + (cp) += MOWGLI_DNS_NS_INT16SIZE; \ +} + +#define MOWGLI_DNS_NS_PUT32(l, cp) { \ + uint32_t t_l = (uint32_t) (l); \ + unsigned char *t_cp = (unsigned char *) (cp); \ + *t_cp++ = t_l >> 24; \ + *t_cp++ = t_l >> 16; \ + *t_cp++ = t_l >> 8; \ + *t_cp = t_l; \ + (cp) += MOWGLI_DNS_NS_INT32SIZE; \ +} + +extern int mowgli_dns_dn_expand(const unsigned char *msg, const unsigned char *eom, const unsigned char *src, char *dst, int dstsiz); +extern int mowgli_dns_dn_skipname(const unsigned char *ptr, const unsigned char *eom); +extern unsigned int mowgli_dns_ns_get16(const unsigned char *src); +extern unsigned long mowgli_dns_ns_get32(const unsigned char *src); +extern void mowgli_dns_ns_put16(unsigned int src, unsigned char *dst); +extern void mowgli_dns_ns_put32(unsigned long src, unsigned char *dst); +extern int mowgli_dns_res_mkquery(const char *dname, int query_class, int type, unsigned char *buf, int buflen); + +#endif |