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- unresponsive servers are not completely blacklisted (because of

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firewalls), but also not probed all the time (because of the request
            list size it generates).  The probe rate is 1%.


git-svn-id: file:///svn/unbound/trunk@2225 be551aaa-1e26-0410-a405-d3ace91eadb9
This commit is contained in:
Wouter Wijngaards 2010-09-09 14:56:51 +00:00
parent 723a54f948
commit 8ec31ebbcc
2 changed files with 14 additions and 3 deletions
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5
doc/Changelog
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@ -1,3 +1,8 @@
9 September 2010: Wouter
- unresponsive servers are not completely blacklisted (because of
firewalls), but also not probed all the time (because of the request
list size it generates). The probe rate is 1%.
20 August 2010: Wouter 20 August 2010: Wouter
- openbsd-lint fixes: acl_list_get_mem used if debug-alloc enabled. - openbsd-lint fixes: acl_list_get_mem used if debug-alloc enabled.
iterator get_mem includes priv_get_mem. delegpt nodup removed. iterator get_mem includes priv_get_mem. delegpt nodup removed.

12
iterator/iter_utils.c
View file

@ -207,9 +207,15 @@ iter_filter_unsuitable(struct iter_env* iter_env, struct module_env* env,
if(lame) if(lame)
return -1; /* server is lame */ return -1; /* server is lame */
else if(rtt >= USEFUL_SERVER_TOP_TIMEOUT && else if(rtt >= USEFUL_SERVER_TOP_TIMEOUT &&
lost >= USEFUL_SERVER_MAX_LOST) lost >= USEFUL_SERVER_MAX_LOST) {
/* server is unresponsive, but keep trying slowly */ /* keep trying slowly, 1% of the time, because
return USEFUL_SERVER_TOP_TIMEOUT+1; * this can be due to weird firewalls. This number
* does not have to be securely random. */
if(ub_random(env->rnd) % 100 == 0)
return USEFUL_SERVER_TOP_TIMEOUT+1;
/* server is unresponsive */
return -1;
}
/* select remainder from worst to best */ /* select remainder from worst to best */
else if(reclame) else if(reclame)
return rtt+USEFUL_SERVER_TOP_TIMEOUT*3; /* nonpref */ return rtt+USEFUL_SERVER_TOP_TIMEOUT*3; /* nonpref */