- Timo Teras changed the reason code used in the resolve callback done when

ares_cancel() is used, to be ARES_ECANCELLED instead of ARES_ETIMEOUT to
  better allow the callback to know what's happening.

CHANGES

@@ -5,6 +5,10 @@
   fails to get inited by other means. This fixes a case of when the c-ares
   init fails when internet access is fone.
 
+- Timo Teras changed the reason code used in the resolve callback done when
+  ares_cancel() is used, to be ARES_ECANCELLED instead of ARES_ETIMEOUT to
+  better allow the callback to know what's happening.
+
 * 14 Jul 2009 (Guenter Knauf)
 - renamed generated config.h to ares_config.h to avoid any future clashes
   with config.h from other projects.

RELEASE-NOTES

@@ -9,6 +9,7 @@ Changed:
  o a build-time configured ares_socklen_t is now used instead of socklen_t
  o new ares_library_init() and ares_library_cleanup() functions
  o new --enable-curldebug configure option
+ o ARES_ECANCELLED is now sent as reason for ares_cancel()
 
 Fixed:
 
@@ -20,6 +21,7 @@ Fixed:
 
 Thanks go to these friendly people for their efforts and contributions:
 
- Phil Blundell, Japheth Cleaver, Yang Tse, Gregor Jasny, Joshua Kwan
+ Phil Blundell, Japheth Cleaver, Yang Tse, Gregor Jasny, Joshua Kwan,
+ Timo Teras
 
 Have fun!

ares.h

@@ -86,6 +86,7 @@ extern "C" {
 #define ARES_ENOMEM             15
 #define ARES_EDESTRUCTION       16
 #define ARES_EBADSTR            17
+#define ARES_ECANCELLED         21
 
 /* ares_getnameinfo error codes */
 #define ARES_EBADFLAGS          18

ares_cancel.3

@@ -27,7 +27,7 @@ ares_cancel \- Cancel a resolve
 The \fBares_cancel\fP function cancels all lookups/requests made on the the
 name service channel identified by \fIchannel\fP.  \fBares_cancel\fP invokes
 the callbacks for each pending query on the channel, passing a status of
-.BR ARES_ETIMEOUT .
+.BR ARES_ECANCELLED .
 These calls give the callbacks a chance to clean up any state which
 might have been stored in their arguments.
 .SH SEE ALSO
@@ -35,5 +35,10 @@ might have been stored in their arguments.
 .BR ares_destroy (3)
 .SH NOTES
 This function was added in c-ares 1.2.0
+
+c-ares 1.6.0 and earlier pass a status of
+.BR ARES_ETIMEOUT
+instead of
+.BR ARES_ECANCELLED .
 .SH AUTHOR
 Dirk Manske

ares_cancel.c

@@ -36,7 +36,7 @@ void ares_cancel(ares_channel channel)
   {
     query = list_node->data;
     list_node = list_node->next;  /* since we're deleting the query */
-    query->callback(query->arg, ARES_ETIMEOUT, 0, NULL, 0);
+    query->callback(query->arg, ARES_ECANCELLED, 0, NULL, 0);
     ares__free_query(query);
   }
 #ifndef NDEBUG