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Commit 66393b95 authored by Luke Huang's avatar Luke Huang
Browse files

Add asynchronous DNS query API 

Adds support for asynchronous "raw" DNS API for clients.
API allows apps to use multinetworking capability correctly
and also allows other query types than A/AAAA.

Test: built, flashed, booted
      atest CtsNativeNetDnsTestCases

Change-Id: I43dea2f66523b228975d6e08cba5f9c8ef59d9e5
parent 23a6c521

include/android/multinetwork.h

+41 −0
Original line number Diff line number Diff line
@@ -110,6 +110,47 @@ int android_getaddrinfofornetwork(net_handle_t network, 


#endif /* __ANDROID_API__ >= 23 */



#if __ANDROID_API__ >= 29



/**

 * Look up the {|ns_class|, |ns_type|} Resource Record (RR) associated

 * with Domain Name |dname| on the given |network|.

 * The typical value for |ns_class| is ns_c_in, while |type| can be any

 * record type (for instance, ns_t_aaaa or ns_t_txt).

 *

 * Returns a file descriptor to watch for read events, or a negative

 * POSIX error code (see errno.h) if an immediate error occurs.

 */

int android_res_nquery(net_handle_t network,

        const char *dname, int ns_class, int ns_type) __INTRODUCED_IN(29);



/**

 * Issue the query |msg| on the given |network|.

 *

 * Returns a file descriptor to watch for read events, or a negative

 * POSIX error code (see errno.h) if an immediate error occurs.

 */

int android_res_nsend(net_handle_t network,

        const unsigned char *msg, int msglen) __INTRODUCED_IN(29);



/**

 * Read a result for the query associated with the |fd| descriptor.

 *

 * Returns:

 *     < 0: negative POSIX error code (see errno.h for possible values). |rcode| is not set.

 *     >= 0: length of |answer|. |rcode| is the resolver return code (e.g., ns_r_nxdomain)

 */

int android_res_nresult(int fd,

        int *rcode, unsigned char *answer, int anslen) __INTRODUCED_IN(29);



/**

 * Attempts to cancel the in-progress query associated with the |nsend_fd|

 * descriptor.

 */

void android_res_cancel(int nsend_fd) __INTRODUCED_IN(29);



#endif /* __ANDROID_API__ >= 29 */



__END_DECLS



#endif  // ANDROID_MULTINETWORK_H