adns_if_eintr= 0x0020,/* allow _wait and _synchronous to return EINTR */
adns_if_nosigpipe= 0x0040,/* applic has SIGPIPE ignored, do not protect */
adns_if_checkc_entex=0x0100,/* consistency checks on entry/exit to adns fns */
- adns_if_checkc_freq= 0x0300 /* consistency checks very frequently (slow!) */
+ adns_if_checkc_freq= 0x0300,/* consistency checks very frequently (slow!) */
+
+ adns_if_af_v4only= 0x0400,/* only return IPv4 addresses, given the choice */
+ adns_if_af_v6only= 0x0800,/* only return IPv6 addresses, ... */
+ adns_if_afmask= adns_if_af_v4only|adns_if_af_v6only
+ /* Only set one of these. They are policy flags, and overridden by the
+ * adns_af:... options in resolv.conf. If the adns_qf_ipv... query
+ * flags are incompatible with these settings (in the sense that no
+ * address families are permitted at all) then the query flags take
+ * precedence; otherwise only records which satisfy all of the stated
+ * requirements are allowed.
+ */
} adns_initflags;
typedef enum { /* In general, or together the desired flags: */
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_ipv4_only= 0x00000400,/* only ever return IPv4 addresses */
- adns_qf_ipv6_ok= 0x00000800,/* returning IPv6 addresses is acceptable */
- adns_qf_ipv6_mapv4= 0x00001800,/* ... and IPv4 addresses should be v6-mapped */
- adns_qf_ipv6_only= 0x00002800,/* ... and don't bother looking for IPv4 */
- adns__qf_afmask= 0x00003800,/* all the above flag bits */
+ adns_qf_ipv6_only= 0x00000800,/* ... and don't bother looking for IPv4 */
+ adns_qf_ipv6_ok= 0x00000c00,/* returning IPv6 addresses is acceptable */
+ adns_qf_domapv4= 0x00001000,/* ... any IPv4 addresses should be v6-mapped */
+ adns_qf_ipv6_mapv4= adns_qf_ipv6_ok|adns_qf_domapv4,
+ adns__qf_afmask= 0x00001c00,/* all the above flag bits */
adns__qf_internalmask= 0x0ff00000
} adns_queryflags;
* 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.
+ *
+ * adns_af:v4only
+ * adns_af:v6only
+ * adns_af:any
+ * Controls whether ADNS looks for IPv4 (A records) and IPv6 (AAAA
+ * records) addresses when it's trying to build a socket address.
+ * The default is `any' which means to allow both. The `sortlist'
+ * directive can be used to control the relative preference of IPv4
+ * and IPv6 addresses if both are returned for the same query.
+ * These override the corresponding init flags (covered by
+ * adns_if_afmask).
*
* There are a number of environment variables which can modify the
* behaviour of adns. They take effect only if adns_init is used, and
* they will be cancelled.
*/
+#define ADNS_ADDR2TEXT_BUFLEN (INET6_ADDRSTRLEN +1/*%*/ +9/*uint32*/ +1/*nul*/)
+
+int adns_text2addr(const char *addr, uint16_t port, struct sockaddr *sa,
+ socklen_t *salen /* set if OK or ENOSPC; otherwise undef */);
+int adns_addr2text(const struct sockaddr *sa,
+ char *addr_buffer, int *addr_buflen /* set iff ENOSPC */,
+ int *port_r /* may be 0 */);
+ /* These DO NOT return an adns_status. Instead, 0 on success,
+ * or an errno value on failure. Error values are:
+ * EAFNOSUPPORT addr2text only
+ * EINVAL text2addr only: addr has invalid syntax
+ * ENOSPC only if *buflen < _BUFLEN or *salen < sizeof(adns_sockaddr)
+ * Extra errors are possible from text2addr if addr specifies a scope
+ * name suffix (ie, it has a "%" and the scope suffix is not numeric):
+ * ENOSYS address is not link local
+ * ENXIO if_nametoindex said it wasn't a valid name
+ * EIO if_nametoindex went crazy (adns prints a message to stderr)
+ * any other if_nametoindex failed
+ * port is always in host byte order and is simply copied to and
+ * from the appropriate sockaddr field (byteswapped as necessary).
+ */
void adns_forallqueries_begin(adns_state ads);
adns_query adns_forallqueries_next(adns_state ads, void **context_r);
~mdw / adns / blobdiff