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authorJakub Hrozek <jhrozek@redhat.com>2011-06-10 14:01:54 +0200
committerStephen Gallagher <sgallagh@redhat.com>2011-06-15 15:56:12 -0400
commitb32ff5bfbca039aaffbe07b85312362f7f6e69cd (patch)
tree9778ddd1285f30567db262d8807223fe0c7137e4 /src
parent58bddcfd77bf21290c42321dbf314b9e1f532e81 (diff)
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Resolve hosts by name from files into resolv_hostent
Diffstat (limited to 'src')
-rw-r--r--src/resolv/async_resolv.c92
1 files changed, 92 insertions, 0 deletions
diff --git a/src/resolv/async_resolv.c b/src/resolv/async_resolv.c
index 9400021f..934fa954 100644
--- a/src/resolv/async_resolv.c
+++ b/src/resolv/async_resolv.c
@@ -627,6 +627,98 @@ fail:
return NULL;
}
+/* =================== Resolve host name in files =========================*/
+struct gethostbyname_files_state {
+ struct resolv_ctx *resolv_ctx;
+
+ /* Part of the query. */
+ const char *name;
+ int family;
+
+ /* query result */
+ struct resolv_hostent *rhostent;
+
+ /* returned by ares. */
+ int status;
+};
+
+/* Fake up an async interface even though files would
+ * always be blocking */
+static struct tevent_req *
+resolv_gethostbyname_files_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct resolv_ctx *ctx,
+ const char *name,
+ int family)
+{
+ struct tevent_req *req;
+ struct gethostbyname_files_state *state;
+ struct hostent *hostent = NULL;
+
+ req = tevent_req_create(mem_ctx, &state,
+ struct gethostbyname_files_state);
+ if (req == NULL) {
+ tevent_req_error(req, ENOMEM);
+ goto done;
+ }
+
+ state->resolv_ctx = ctx;
+ state->name = name;
+ state->rhostent = NULL;
+ state->family = family;
+
+ DEBUG(4, ("Trying to resolve %s record of '%s' in files\n",
+ state->family == AF_INET ? "A" : "AAAA", state->name));
+
+ state->status = ares_gethostbyname_file(state->resolv_ctx->channel,
+ state->name, state->family,
+ &hostent);
+
+ if (state->status == ARES_SUCCESS) {
+ state->rhostent = resolv_copy_hostent2(state, hostent);
+ if (state->rhostent == NULL) {
+ tevent_req_error(req, ENOMEM);
+ goto done;
+ }
+ } else if (state->status == ARES_ENOTFOUND ||
+ state->status == ARES_ENODATA) {
+ /* Just say we didn't find anything and let the caller decide
+ * about retrying */
+ tevent_req_error(req, ENOENT);
+ goto done;
+ } else {
+ tevent_req_error(req, return_code(state->status));
+ goto done;
+ }
+
+ tevent_req_done(req);
+done:
+ if (hostent) ares_free_hostent(hostent);
+ tevent_req_post(req, ev);
+ return req;
+}
+
+static errno_t
+resolv_gethostbyname_files_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
+ int *status, struct resolv_hostent **rhostent)
+{
+ struct gethostbyname_files_state *state = tevent_req_data(req,
+ struct gethostbyname_files_state);
+
+ /* Fill in even in case of error as status contains the
+ * c-ares return code */
+ if (status) {
+ *status = state->status;
+ }
+ if (rhostent) {
+ *rhostent = talloc_steal(mem_ctx, state->rhostent);
+ }
+
+ TEVENT_REQ_RETURN_ON_ERROR(req);
+
+ return EOK;
+}
+
/*******************************************************************
* Get host by name. *
*******************************************************************/