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Diffstat (limited to 'src/libmowgli/dns/dns.h')
| -rw-r--r-- | src/libmowgli/dns/dns.h | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/src/libmowgli/dns/dns.h b/src/libmowgli/dns/dns.h new file mode 100644 index 0000000..9cbb6ee --- /dev/null +++ b/src/libmowgli/dns/dns.h @@ -0,0 +1,96 @@ +/* + * Copyright (c) 2012 Elizabeth J. Myers. All rights reserved. + * + * Permission to use, copy, modify, and/or 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, + * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef __MOWGLI_DNS_DNS_H__ +#define __MOWGLI_DNS_DNS_H__ + +#include "mowgli.h" + +/* Longest hostname we're willing to work with */ +#define MOWGLI_DNS_RES_HOSTLEN 512 + +/* Resolver types */ +#define MOWGLI_DNS_TYPE_CUSTOM 0 +#define MOWGLI_DNS_TYPE_ASYNC 1 +#define MOWGLI_DNS_TYPE_HELPER 2 + +/* Lookup types */ +#define MOWGLI_DNS_T_A 1 +#define MOWGLI_DNS_T_AAAA 28 +#define MOWGLI_DNS_T_PTR 12 +#define MOWGLI_DNS_T_CNAME 5 +#define MOWGLI_DNS_T_MX 15 +#define MOWGLI_DNS_T_TXT 16 +#define MOWGLI_DNS_T_SSHFP 44 +#define MOWGLI_DNS_T_NULL 10 + +/* Return codes */ +#define MOWGLI_DNS_RES_SUCCESS 0 +#define MOWGLI_DNS_RES_NXDOMAIN 1 +#define MOWGLI_DNS_RES_INVALID 2 +#define MOWGLI_DNS_RES_TIMEOUT 3 + +typedef struct _mowgli_dns_t mowgli_dns_t; +typedef struct _mowgli_dns_query_t mowgli_dns_query_t; +typedef struct _mowgli_dns_reply_t mowgli_dns_reply_t; + +typedef struct +{ + int (*mowgli_dns_init_func_t)(mowgli_dns_t *, mowgli_eventloop_t *); + void (*mowgli_dns_fini_func_t)(mowgli_dns_t *); + int (*mowgli_dns_restart_func_t)(mowgli_dns_t *); + void (*mowgli_dns_delete_query_func_t)(mowgli_dns_t *, const mowgli_dns_query_t *); + void (*mowgli_dns_gethost_byname_func_t)(mowgli_dns_t *, const char *, mowgli_dns_query_t *, int); + void (*mowgli_dns_gethost_byaddr_func_t)(mowgli_dns_t *, const struct sockaddr_storage *, mowgli_dns_query_t *); +} mowgli_dns_ops_t; + +struct _mowgli_dns_reply_t +{ + char *h_name; + mowgli_vio_sockaddr_t addr; +}; + +struct _mowgli_dns_t +{ + int dns_type; + const mowgli_dns_ops_t *dns_ops; + void *dns_state; +}; + +struct _mowgli_dns_query_t +{ + void *ptr; /* pointer used by callback to identify request */ + void (*callback) (mowgli_dns_reply_t * reply, int result, void *vptr); /* callback to call */ +}; + +extern mowgli_dns_t * mowgli_dns_create(mowgli_eventloop_t *eventloop, int implementation); +extern int mowgli_dns_init(mowgli_dns_t *dns, mowgli_eventloop_t *eventloop, const mowgli_dns_ops_t *ops); +extern void mowgli_dns_destroy(mowgli_dns_t *dns); +extern int mowgli_dns_restart(mowgli_dns_t *dns); +extern void mowgli_dns_delete_query(mowgli_dns_t *dns, const mowgli_dns_query_t *query); +extern void mowgli_dns_gethost_byname(mowgli_dns_t *dns, const char *name, mowgli_dns_query_t *query, int type); +extern void mowgli_dns_gethost_byaddr(mowgli_dns_t *dns, const struct sockaddr_storage *addr, mowgli_dns_query_t *query); + +/* Pull in headers that depend on these types */ +#include "dns_evloop_res.h" +#include "dns_evloop_reslib.h" + +#endif + |