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/*
* Copyright (c) 2009,2010 Eric Faurot <eric@faurot.net>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include "dnsdefs.h"
struct packed {
char *data;
size_t len;
size_t offset;
const char *err;
};
struct header {
uint16_t id;
uint16_t flags;
uint16_t qdcount;
uint16_t ancount;
uint16_t nscount;
uint16_t arcount;
};
struct query {
char q_dname[DOMAIN_MAXLEN];
uint16_t q_type;
uint16_t q_class;
};
struct rr {
char rr_dname[DOMAIN_MAXLEN];
uint16_t rr_type;
uint16_t rr_class;
uint32_t rr_ttl;
union {
struct {
char cname[DOMAIN_MAXLEN];
} cname;
struct {
uint16_t preference;
char exchange[DOMAIN_MAXLEN];
} mx;
struct {
char nsname[DOMAIN_MAXLEN];
} ns;
struct {
char ptrname[DOMAIN_MAXLEN];
} ptr;
struct {
char mname[DOMAIN_MAXLEN];
char rname[DOMAIN_MAXLEN];
uint32_t serial;
uint32_t refresh;
uint32_t retry;
uint32_t expire;
uint32_t minimum;
} soa;
struct {
struct in_addr addr;
} in_a;
struct {
struct in6_addr addr6;
} in_aaaa;
struct {
uint16_t rdlen;
const void *rdata;
} other;
} rr;
};
struct rr_dynamic {
const char *rd_dname;
uint16_t rd_type;
uint16_t rd_class;
uint32_t rd_ttl;
union rr_subtype {
struct rr_cname {
char *cname;
} cname;
struct rr_mx {
uint16_t preference;
char *exchange;
} mx;
struct rr_ns {
char *nsname;
} ns;
struct rr_ptr {
char *ptrname;
} ptr;
struct rr_soa {
char *mname;
char *rname;
uint32_t serial;
uint32_t refresh;
uint32_t retry;
uint32_t expire;
uint32_t minimum;
} soa;
struct rr_in_a {
struct in_addr addr;
} in_a;
struct rr_in_aaaa {
struct in6_addr addr6;
} in_aaaa;
struct rr_other {
uint16_t rdlen;
void *rdata;
} other;
} rd;
};
/* pack.c */
void packed_init(struct packed*, char*, size_t);
int unpack_data(struct packed*, void*, size_t);
int unpack_u16(struct packed*, uint16_t*);
int unpack_u32(struct packed*, uint32_t*);
int unpack_inaddr(struct packed*, struct in_addr*);
int unpack_in6addr(struct packed*, struct in6_addr*);
int unpack_dname(struct packed*, char*, size_t);
int unpack_header(struct packed*, struct header*);
int unpack_query(struct packed*, struct query*);
int unpack_rr(struct packed*, struct rr*);
int pack_data(struct packed*, const void*, size_t);
int pack_u16(struct packed*, uint16_t);
int pack_u32(struct packed*, uint32_t);
int pack_inaddr(struct packed*, struct in_addr);
int pack_in6addr(struct packed*, struct in6_addr);
int pack_header(struct packed*, const struct header*);
int pack_dname(struct packed*, const char*);
int pack_query(struct packed*, uint16_t, uint16_t, const char*);
int pack_rrdynamic(struct packed*, const struct rr_dynamic *rr);
/* sockaddr.c */
int sockaddr_from_rr(struct sockaddr *, struct rr *);
int sockaddr_from_str(struct sockaddr *, int, const char *);
ssize_t sockaddr_as_fqdn(const struct sockaddr *, char *, size_t);
void sockaddr_set_port(struct sockaddr *, int);
int sockaddr_connect(const struct sockaddr *, int);
int sockaddr_listen(const struct sockaddr *, int);
/* print.c */
const char *print_host(struct sockaddr*, char*, size_t);
const char *print_addr(struct sockaddr*, char*, size_t);
const char *print_dname(const char*, char*, size_t);
const char *print_header(struct header*, char*, size_t);
const char *print_query(struct query*, char*, size_t);
const char *print_rr(struct rr*, char*, size_t);
const char *print_rrdynamic(struct rr_dynamic*, char*, size_t);
const char *typetostr(uint16_t);
const char *classtostr(uint16_t);
const char *rcodetostr(uint16_t);
uint16_t strtotype(const char*);
uint16_t strtoclass(const char*);
const char *inet6_ntoa(struct in6_addr);
/* dname.c */
size_t dname_len(const char *);
size_t dname_depth(const char *);
ssize_t dname_from_fqdn(const char*, char*, size_t);
ssize_t dname_from_sockaddr(const struct sockaddr *, char*, size_t);
int dname_is_in(const char*, const char*);
int dname_is_wildcard(const char *);
int dname_is_reverse(const char *);
int dname_check_label(const char*, size_t);
const char* dname_up(const char*, unsigned int);
/* res_random.c */
unsigned int res_randomid(void);
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