This prevents races on fctx->client whenever a new fetch joins a existing
fetch (by calling fctx_join) as it is now invariant for the active life of
fctx.
(cherry picked from commit 9ca6ad6311)
FCTX_ATTR_SHUTTINGDOWN needs to be set and tested while holding the node
lock but the rest of the attributes don't as they are task locked. Making
fctx->attributes atomic allows both behaviours without races.
(cherry picked from commit 912ce87479)
The dns_adb_beginudpfetch() is called only for UDP queries, but
the dns_adb_endudpfetch() is called for all queries, including
TCP. This messages the quota counting in adb.c.
(cherry picked from commit a5189eefa5)
When doing regular signing expiry time is jittered to make sure
that the re-signing times are not clumped together. This expands
this behaviour to expiry times of dynamically added records.
When incrementally re-signing a zone use the full jitter range if
the server appears to have been offline for greater than 5 minutes
otherwise use a small jitter range of 3600 seconds. This will stop
the signatures becoming more clustered if the server has been off
line for a significant period of time (> 5 minutes).
(cherry picked from commit 6b2fd40269)
Related scan-build report:
dnstap_test.c:169:2: warning: Value stored to 'result' is never read
result = dns_test_makeview("test", &view);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
dnstap_test.c:193:2: warning: Value stored to 'result' is never read
result = dns_compress_init(&cctx, -1, dt_mctx);
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2 warnings generated.
(cherry picked from commit e9acad638e)
EDNS mechanisms only apply to DNS over UDP. Thus, errors encountered
while sending DNS queries over TCP must not influence EDNS timeout
statistics.
(cherry picked from commit fce3c93ea2)
If a TCP connection fails while attempting to send a query to a server,
the fetch context will be restarted without marking the target server as
a bad one. If this happens for a server which:
- was already marked with the DNS_FETCHOPT_EDNS512 flag,
- responds to EDNS queries with the UDP payload size set to 512 bytes,
- does not send response packets larger than 512 bytes,
and the response for the query being sent is larger than 512 byes, then
named will pointlessly alternate between sending UDP queries with EDNS
UDP payload size set to 512 bytes (which are responded to with truncated
answers) and TCP connections until the fetch context retry limit is
reached. Prevent such query loops by marking the server as bad for a
given fetch context if the advertised EDNS UDP payload size for that
server gets reduced to 512 bytes and it is impossible to reach it using
TCP.
(cherry picked from commit 6cd115994e)
cppcheck 1.89 emits a false positive for lib/dns/spnego_asn1.c:
lib/dns/spnego_asn1.c:700:9: error: Uninitialized variable: data [uninitvar]
memset(data, 0, sizeof(*data));
^
lib/dns/spnego.c:1709:47: note: Calling function 'decode_NegTokenResp', 3rd argument '&resp' value is <Uninit>
ret = decode_NegTokenResp(buf + taglen, len, &resp, NULL);
^
lib/dns/spnego_asn1.c:700:9: note: Uninitialized variable: data
memset(data, 0, sizeof(*data));
^
This message started appearing with cppcheck 1.89 [1], but it will be
gone in the next release [2], so just suppress it for the time being.
[1] af214e8212
[2] 2595b82634
(cherry picked from commit db7fd16346)
Use the semantic patch from the previous commit to replace all the calls to
dns_name_copy() with NULL as third argument with dns_name_copynf().
(cherry picked from commit c2dad0dcb2)
The dns_name_copy() function followed two different semanitcs that was driven
whether the last argument was or wasn't NULL. This commit splits the function
in two where now third argument to dns_name_copy() can't be NULL and
dns_name_copynf() doesn't have third argument.
(cherry picked from commit f7aef3738a)
This commit was done by hand to add the RUNTIME_CHECK() around stray
dns_name_copy() calls with NULL as third argument. This covers the edge cases
that doesn't make sense to write a semantic patch since the usage pattern was
unique or almost unique.
(cherry picked from commit 5efa29e03a)
This second commit uses second semantic patch to replace the calls to
dns_name_copy() with NULL as third argument where the result was stored in a
isc_result_t variable. As the dns_name_copy(..., NULL) cannot fail gracefully
when the third argument is NULL, it was just a bunch of dead code.
Couple of manual tweaks (removing dead labels and unused variables) were
manually applied on top of the semantic patch.
(cherry picked from commit 89b269b0d2)
This commit add RUNTIME_CHECK() around all simple dns_name_copy() calls where
the third argument is NULL using the semantic patch from the previous commit.
(cherry picked from commit 35bd7e4da0)
