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| author |   Florian Weimer <fweimer@redhat.com> | 2019-10-30 17:26:58 +0100 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2019-11-27 20:54:37 +0100 |
| commit | 446997ff1433d33452b81dfa9e626b8dccf101a4 (patch) | |
| tree | 9a0e13fb7ca042a6f05fa9310f862c494580da80 /resolv/res_mkquery.c | |
| parent | dlsym: Do not determine caller link map if not needed (diff) | |
| download | glibc-446997ff1433d33452b81dfa9e626b8dccf101a4.tar.gz glibc-446997ff1433d33452b81dfa9e626b8dccf101a4.tar.bz2 glibc-446997ff1433d33452b81dfa9e626b8dccf101a4.zip | |
resolv: Implement trust-ad option for /etc/resolv.conf [BZ #20358]
This introduces a concept of trusted name servers, for which the
AD bit is passed through to applications. For untrusted name
servers (the default), the AD bit in responses are cleared, to
provide a safe default.
This approach is very similar to the one suggested by Pavel Šimerda
in <https://bugzilla.redhat.com/show_bug.cgi?id=1164339#c15>.
The DNS test framework in support/ is enhanced with support for
setting the AD bit in responses.
Tested on x86_64-linux-gnu.
Change-Id: Ibfe0f7c73ea221c35979842c5c3b6ed486495ccc
Diffstat (limited to 'resolv/res_mkquery.c')
| -rw-r--r-- | resolv/res_mkquery.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/resolv/res_mkquery.c b/resolv/res_mkquery.c index cf0c9e229c..0d39353b41 100644 --- a/resolv/res_mkquery.c +++ b/resolv/res_mkquery.c @@ -118,6 +118,8 @@ __res_context_mkquery (struct resolv_context *ctx, int op, const char *dname, the application does multiple requests. */ hp->id = random_bits (); hp->opcode = op; + if (ctx->resp->options & RES_TRUSTAD) + hp->ad = 1; hp->rd = (ctx->resp->options & RES_RECURSE) != 0; hp->rcode = NOERROR; cp = buf + HFIXEDSZ; |