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author | Florian Weimer <fweimer@redhat.com> | 2017-07-01 00:53:05 +0200 |
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committer | Florian Weimer <fweimer@redhat.com> | 2017-07-03 21:01:42 +0200 |
commit | 3f853f22c87f0b671c0366eb290919719fa56c0e (patch) | |
tree | 23f8835838728d4be3efca524754c1a2f5bb0396 /resolv/resolv_context.h | |
parent | f30a54b21b83f254533c59ca72ad17af5249c6be (diff) | |
download | glibc-3f853f22c87f0b671c0366eb290919719fa56c0e.zip glibc-3f853f22c87f0b671c0366eb290919719fa56c0e.tar.gz glibc-3f853f22c87f0b671c0366eb290919719fa56c0e.tar.bz2 |
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.h | 19 |
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 |