#include <sys/time.h>
#include <unistd.h>
+#ifndef AF_INET6
+#include "adns-in6fake.h"
+#endif
+
/* All struct in_addr anywhere in adns are in NETWORK byte order. */
typedef struct adns__state *adns_state;
adns_if_nosigpipe= 0x0040, /* applic has SIGPIPE set to SIG_IGN, do not protect */
adns_if_checkc_entex= 0x0100, /* do consistency checks on entry/exit to adns funcs */
adns_if_checkc_freq= 0x0300 /* do consistency checks very frequently (slow!) */
+ adns_if_ip6= 0x1000 /* make default be adns_qf_ip6 */
} adns_initflags;
typedef enum {
adns_qf_quotefail_cname= 0x00000080, /* refuse if quote-req chars in CNAME we go via */
adns_qf_cname_loose= 0x00000100, /* allow refs to CNAMEs - without, get _s_cname */
adns_qf_cname_forbid= 0x00000200, /* don't follow CNAMEs, instead give _s_cname */
+ adns_qf_ip6= 0x00001000, /* return addrs as AF_INET6 in all cases */
+ adns_qf_ip6mixed= 0x00002000, /* return mixture of AF_INET4 and AF_INET6 */
+ adns_qf_ip4= 0x00003000, /* never return AF_INET6, even with _if_ip6 */
adns__qf_internalmask= 0x0ff00000
} adns_queryflags;
+/* IPv6 support:
+ * adns_if_ip6 has the effect of changing the default from
+ * adns_qf_ip4 to adns_qf_ip6.
+ *
+ * query type _qf__ip4 _qf_ip6mixed _qf_ip6
+ *
+ * _r_addr A? => AF_INET AAAA? => AF_INET6 AAAA? => AF_INET6
+ * else fail else A? => AF_INET else A? => AF_INET6
+ *
+ * _r_a A => AF_INET A => AF_INET A => AF_INET6
+ *
+ * _r_aaaa AAAA => AF_INET6 AAAA => AF_INET6 AAAA => AF_INET6
+ *
+ * Ie,
+ * _ip4: only A lookups will be done, and everything is
+ * returned as AF_INET addresses;
+ * _ip6mixed: will look for AAAA records first, and if there
+ * are any, return them as AF_INET6, otherwise like _ip4.
+ * _ip6: like _ip6mixed, but will return even IPv4 addresses in
+ * IPv6-mapped form inside AF_INET6, for all query types.
+ *
+ * Furthermore, there are configuration options which can prevent the
+ * use of either AAAA or A records for _r_addr; so it is safe to use
+ * _qf_ip6 and _r_addr without checking explicitly whether the host
+ * has IPv6 connectivity.
+ *
+ * Applications which do not support IPv4 should set none of these
+ * flags. Applications which have been `naively' converted to use
+ * AF_INET6 throughout should set adns_if_ip6. Applications which
+ * know what they are doing should know which flags to set :-).
+ */
+
typedef enum {
adns__rrt_typemask= 0x0ffff,
adns__qtf_deref= 0x10000, /* dereference domains and perhaps produce extra data */
adns_r_rp_raw= 17,
adns_r_rp= adns_r_rp_raw|adns__qtf_mail822,
+ adns_r_aaaa= 28,
+
+ adns_r_srv_raw= 33,
+ adns_r_srv= adns_r_srv_raw|adns__qtf_deref,
+
adns_r_addr= adns_r_a|adns__qtf_deref
} adns_rrtype;
union {
struct sockaddr sa;
struct sockaddr_in inet;
+ struct sockaddr_in6 inet6;
} addr;
} adns_rr_addr;
} adns_rr_soa;
typedef struct {
+ unsigned short priority;
+ unsigned short weight;
+ unsigned short port;
+ adns_rr_hostaddr ha;
+} adns_rr_srv;
+
+typedef struct {
+ unsigned short priority;
+ unsigned short weight;
+ unsigned short port;
+ char *target;
+} adns_rr_srvraw;
+
+typedef struct {
adns_status status;
char *cname; /* always NULL if query was for CNAME records */
char *owner; /* only set if requested in query flags, and may be 0 on error anyway */
adns_rr_intstr *(*manyistr); /* txt (list of strings ends with i=-1, str=0) */
adns_rr_addr *addr; /* addr */
struct in_addr *inaddr; /* a */
+ struct in6_addr *inaddr6; /* aaaa */
adns_rr_hostaddr *hostaddr; /* ns */
adns_rr_intstrpair *intstrpair; /* hinfo */
adns_rr_strpair *strpair; /* rp, rp_raw */
adns_rr_inthostaddr *inthostaddr; /* mx */
adns_rr_intstr *intstr; /* mx_raw */
adns_rr_soa *soa; /* soa, soa_raw */
+ adns_rr_srv *srv; /* srv */
+ adns_rr_srvraw *srvraw; /* srv_raw */
} rrs;
} adns_answer;
* Changes the consistency checking frequency; this overrides the
* setting of adns_if_check_entex, adns_if_check_freq, or neither,
* in the flags passed to adns_init.
+ *
+ * in6only
+ * in4only
+ * Return only IPv6, respectively only IPv4 addresses, in
+ * _rr_addr's. This may result in an adns_s_nodata error, if the
+ * application only supports, or the remote host only has, the wrong
+ * kind of address.
*
* There are a number of environment variables which can modify the
* behaviour of adns. They take effect only if adns_init is used, and
void *context,
adns_query *query_r);
/* type must be _r_ptr or _r_ptr_raw. _qf_search is ignored.
- * addr->sa_family must be AF_INET or you get ENOSYS.
+ * addr->sa_family must be AF_INET or AF_INET6 you get ENOSYS.
+ */
+
+int adns_getaddrinfo(adns_state ads,
+ const char *name, /* Eg, "www.example.coom" */
+ const char *service, /* Eg, "http" */
+ const char *protocol, /* Eg, "tcp" */
+ unsigned short defaultport, /* Eg, 80 */
+ adns_queryflags flags,
+ adns_answer **answer_r, int *invented_r);
+/* Does an SRV lookup (RFC2052). If this fails, tries an AAAA or A
+ * lookup instead, and if found uses getservbyname to find the port
+ * number (or failing that, uses defaultport). In the `fallback'
+ * case, will invent an SRV record with have priority and weight == 0
+ * and set *invented_r to 1; if real SRV records were found, will set
+ * *invented_r to 0. invented_r may be null but answer_r may not be.
+ * If _getaddrinfo returns nonzero, *answer_r and/or *invented_r may
+ * or may not have been overwritten and should not be used.
+ *
+ * NB, like adns_synchronous, can fail either by returning an errno
+ * value, or by returning an adns_answer with ->nrrs==0 and
+ * ->status!=0.
+ *
+ * You have to write two loops when using the returned value, an outer
+ * one to loop over the returned SRV's, and an inner one to loop over
+ * the addresses for each one.
*/
int adns_submit_reverse_any(adns_state ads,
~mdw / adns / blobdiff