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authorFlorian Weimer <fweimer@redhat.com>2017-07-01 00:53:05 +0200
committerFlorian Weimer <fweimer@redhat.com>2017-07-03 21:01:42 +0200
commit3f853f22c87f0b671c0366eb290919719fa56c0e (patch)
tree23f8835838728d4be3efca524754c1a2f5bb0396 /resolv/resolv_context.h
parentf30a54b21b83f254533c59ca72ad17af5249c6be (diff)
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resolv: Lift domain search list limits [BZ #19569] [BZ #21475]
This change uses the extended resolver state in struct resolv_conf to store the search list. If applications have not patched the _res object directly, this extended search list will be used by the stub resolver during name resolution.
Diffstat (limited to 'resolv/resolv_context.h')
-rw-r--r--resolv/resolv_context.h19
1 files changed, 19 insertions, 0 deletions
diff --git a/resolv/resolv_context.h b/resolv/resolv_context.h
index ff9ef2c..0f4d47d 100644
--- a/resolv/resolv_context.h
+++ b/resolv/resolv_context.h
@@ -93,6 +93,25 @@ struct resolv_context *__resolv_context_get_override (struct __res_state *)
__attribute__ ((nonnull (1), warn_unused_result));
libc_hidden_proto (__resolv_context_get_override)
+/* Return the search path entry at INDEX, or NULL if there are fewer
+ than INDEX entries. */
+static __attribute__ ((nonnull (1), unused)) const char *
+__resolv_context_search_list (const struct resolv_context *ctx, size_t index)
+{
+ if (ctx->conf != NULL)
+ {
+ if (index < ctx->conf->search_list_size)
+ return ctx->conf->search_list[index];
+ else
+ return NULL;
+ }
+ /* Fallback. ctx->resp->dnsrch is a NULL-terminated array. */
+ for (size_t i = 0; ctx->resp->dnsrch[i] != NULL && i < MAXDNSRCH; ++i)
+ if (i == index)
+ return ctx->resp->dnsrch[i];
+ return NULL;
+}
+
/* Called during thread shutdown to free the associated resolver
context (mostly in response to cancellation, otherwise the
__resolv_context_get/__resolv_context_put pairing will already have