#include <errno.h>
#include <string.h>
#include <stdlib.h>
+#include <stdbool.h>
#include <sys/time.h>
+#define ADNS_FEATURE_MANYAF
#include "adns.h"
#include "dlist.h"
rcode_refused
} dns_rcode;
+enum {
+ adns__qf_addr_answer= 0x01000000,/* addr query received an answer */
+ adns__qf_addr_cname = 0x02000000 /* addr subquery performed on cname */
+};
+
/* Shared data structures */
typedef struct {
struct timeval now;
} parseinfo;
-union gen_addr {
- struct in_addr v4;
- struct in6_addr v6;
-};
-
-struct af_addr { int af; union gen_addr addr; };
-
#define NREVDOMAINS 2 /* keep in sync with addrfam! */
struct revparse_state {
unsigned map; /* which domains are still live */
union {
struct {
adns_rrtype rev_rrtype;
- struct af_addr addr;
+ adns_sockaddr addr;
} ptr;
+ struct {
+ unsigned want, have;
+ } addr;
} tinfo; /* type-specific state for the query itself: zero-init if you
* don't know better. */
/* Return the output resource-record element size; if this is null, then
* the rrsz member can be used.
*/
+
+ void (*query_send)(adns_query qu, struct timeval now);
+ /* Send the query to nameservers, and hook it into the appropriate queue.
+ * Normal behaviour is to call adns__query_send, but this can be overridden
+ * for special effects.
+ */
} typeinfo;
adns_status adns__ckl_hostname(adns_state ads, adns_queryflags flags,
typedef struct allocnode {
struct allocnode *next, *back;
+ size_t sz;
} allocnode;
union maxalign {
* Queries in state tcpw/tcpw have been sent (or are in the to-send buffer)
* iff the tcp connection is in state server_ok.
*
+ * Internal queries (from adns__submit_internal) end up on intdone
+ * instead of output, and the callbacks are made on the way out of
+ * adns, to avoid reentrancy hazards.
+ *
* +------------------------+
* START -----> | tosend/NONE |
* +------------------------+
adns_logcallbackfn *logfn;
void *logfndata;
int configerrno;
- struct query_queue udpw, tcpw, childw, output;
+ struct query_queue udpw, tcpw, childw, output, intdone;
adns_query forallnext;
int nextid, tcpsocket;
struct udpsocket { int af; int fd; } udpsocket[MAXUDP];
struct pollfd pollfds_buf[MAX_POLLFDS];
adns_rr_addr servers[MAXSERVERS];
struct sortlist {
- int af;
- union gen_addr base, mask;
+ adns_sockaddr base, mask;
} sortlist[MAXSORTLIST];
char **searchlist;
unsigned short rand48xsubi[3];
/* From addrfam.c: */
-extern int adns__af_supported_p(int af);
-/* Return nonzero if the address family af known to the library and supported
- * by the other addrfam operations. Note that the other operations will
- * abort on an unrecognized address family rather than returning an error
- * code.
+extern int adns__addrs_equal_raw(const struct sockaddr *a,
+ int bf, const void *b);
+/* Returns nonzero a's family is bf and a's protocol address field
+ * refers to the same protocol address as that stored at ba.
*/
-extern int adns__genaddr_equal_p(int af, const union gen_addr *a,
- int bf, const void *b);
-/* b should point to a `struct in_addr' or equivalent for the address family
- * bf. Returns nonzero if the two addresses are equal.
+extern int adns__addrs_equal(const adns_sockaddr *a,
+ const adns_sockaddr *b);
+/* Returns nonzero if the two refer to the same protocol address
+ * (disregarding port, IPv6 scope, etc).
*/
-extern int adns__sockaddr_equal_p(const struct sockaddr *sa,
- const struct sockaddr *sb);
+extern int adns__sockaddrs_equal(const struct sockaddr *sa,
+ const struct sockaddr *sb);
/* Return nonzero if the two socket addresses are equal (in all significant
* respects).
*/
extern int adns__addr_width(int af);
/* Return the width of addresses of family af, in bits. */
-extern void adns__prefix_mask(int af, int len, union gen_addr *mask_r);
-/* Store in mask_r an address mask for address family af, whose first len
- * bits are set and the remainder are clear. This is what you want for
- * converting a prefix length into a netmask.
+extern void adns__prefix_mask(adns_sockaddr *sa, int len);
+/* Stores in sa's protocol address field an address mask for address
+ * family af, whose first len bits are set and the remainder are
+ * clear. On entry, sa's af field must be set. This is what you want
+ * for converting a prefix length into a netmask.
*/
-extern int adns__guess_prefix_length(int af, const union gen_addr *addr);
+extern int adns__guess_prefix_length(const adns_sockaddr *addr);
/* Given a network base address, guess the appropriate prefix length based on
* the appropriate rules for the address family (e.g., for IPv4, this uses
* the old address classes).
*/
-extern int adns__addr_match_p(int addraf, const union gen_addr *addr,
- int netaf, const union gen_addr *base,
- const union gen_addr *mask);
-/* Given an address af (with family addraf) and a network (with family netaf,
- * base address base, and netmask mask), return nonzero if the address lies
- * within the network.
+extern int adns__addr_matches(int af, const void *addr,
+ const adns_sockaddr *base,
+ const adns_sockaddr *mask);
+/* Return nonzero if the protocol address specified by af and addr
+ * lies within the network specified by base and mask.
*/
-extern void adns__sockaddr_extract(const struct sockaddr *sa,
- union gen_addr *a_r, int *port_r);
-/* Extract fields from the socket address, filling in *a_r and *port_r with
- * the address and (integer, host byte-order) port number, respectively.
- * Either (or, pointlessly, both) of a_r and port_r may be null to mean
- * `don't care'.
+extern void adns__addr_inject(const void *a, adns_sockaddr *sa);
+/* Injects the protocol address *a into the socket adress sa. Assumes
+ * that sa->sa_family is already set correctly.
*/
-extern void adns__sockaddr_inject(const union gen_addr *a, int port,
- struct sockaddr *sa);
-/* Inject fields into the socket adress sa. If a is not null, copy the
- * address in; if port is not -1, then copy the port (converting from host
- * byte-order). Assumes that sa->sa_family is already set correctly.
+extern const void *adns__sockaddr_addr(const struct sockaddr *sa);
+/* Returns the address of the protocol address field in sa.
*/
char *adns__sockaddr_ntoa(const struct sockaddr *sa, char *buf);
*/
extern int adns__revparse_done(struct revparse_state *rps, int nlabels,
- adns_rrtype *rrtype_r, struct af_addr *addr_r);
-/* Finishes parsing a reverse-domain name, given the total number of labels
- * in the name. On success, fills in the address in *addr_r, and the forward
- * query type in *rrtype_r (because that turns out to be useful). Returns
- * nonzero if the parse must be abandoned.
+ adns_rrtype *rrtype_r, adns_sockaddr *addr_r);
+/* Finishes parsing a reverse-domain name, given the total number of
+ * labels in the name. On success, fills in the af and protocol
+ * address in *addr_r, and the forward query type in *rrtype_r
+ * (because that turns out to be useful). Returns nonzero if the
+ * parse must be abandoned.
*/
/* From setup.c: */
/* From query.c: */
adns_status adns__internal_submit(adns_state ads, adns_query *query_r,
+ adns_query parent,
const typeinfo *typei, adns_rrtype type,
vbuf *qumsg_vb, int id,
adns_queryflags flags, struct timeval now,
* answer->cname and answer->owner are _preserved.
*/
-void adns__transfer_interim(adns_query from, adns_query to,
- void *block, size_t sz);
+void adns__transfer_interim(adns_query from, adns_query to, void *block);
/* Transfers an interim allocation from one query to another, so that
* the `to' query will have room for the data when we get to makefinal
* and so that the free will happen when the `to' query is freed
* TTLs get inherited by their parents.
*/
+void adns__free_interim(adns_query qu, void *p);
+/* Forget about a block allocated by adns__alloc_interim.
+ */
+
void *adns__alloc_mine(adns_query qu, size_t sz);
/* Like _interim, but does not record the length for later
* copying into the answer. This just ensures that the memory
* in a datagram and discover that we need to retry the query.
*/
+void adns__cancel(adns_query qu);
void adns__query_done(adns_query qu);
void adns__query_fail(adns_query qu, adns_status stat);
+void adns__cancel_children(adns_query qu);
+
+void adns__returning(adns_state ads, adns_query qu);
+/* Must be called before returning from adns any time that we have
+ * progressed (including made, finished or destroyed) queries.
+ *
+ * Might reenter adns via internal query callbacks, so
+ * external-faciing functions which call adns__returning should
+ * normally be avoided in internal code. */
/* From reply.c: */
int vbuf__append_quoted1035(vbuf *vb, const byte *buf, int len);
+bool adns__labels_equal(const byte *a, int al, const byte *b, int bl);
+
/* From event.c: */
void adns__tcp_broken(adns_state ads, const char *what, const char *why);
void adns__must_gettimeofday(adns_state ads, const struct timeval **now_io,
struct timeval *tv_buf);
+/* Call with care - might reentrantly cause queries to be completed! */
int adns__pollfds(adns_state ads, struct pollfd pollfds_buf[MAX_POLLFDS]);
void adns__fdevents(adns_state ads,
static inline int ctype_alpha(int c) {
return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z');
}
+static inline int ctype_toupper(int c) {
+ return ctype_alpha(c) ? (c & ~32) : c;
+}
static inline int ctype_822special(int c) {
return strchr("()<>@,;:\\\".[]",c) != 0;
}
~mdw / adns / blobdiff