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Add code for explicit selection of pooled A records.

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To better cope with round robin pooled A records like keys.gnupg.net
we need to keep some information on unresponsive hosts etc.  What we
do now is to resolve the hostnames, remember them and select a random
one.  If a host is dead it will be marked and a different one
selected.  This is intended to solve the problem of long timeouts due
to unresponsive hosts.

The code is not yet finished but selection works.
This commit is contained in:
Werner Koch 2011-04-12 16:30:08 +02:00
parent 4206a2bd48
commit f1e9f510ec
8 changed files with 455 additions and 81 deletions
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11
dirmngr/server.c
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@ -42,6 +42,7 @@
#include "misc.h"
#include "ldap-wrapper.h"
#include "ks-action.h"
#include "ks-engine.h" /* (ks_hkp_print_hosttable) */
/* To avoid DoS attacks we limit the size of a certificate to
something reasonable. */
@ -1374,12 +1375,13 @@ cmd_keyserver (assuan_context_t ctx, char *line)
{
ctrl_t ctrl = assuan_get_pointer (ctx);
gpg_error_t err;
int clear_flag, add_flag, help_flag;
int clear_flag, add_flag, help_flag, host_flag;
uri_item_t item = NULL; /* gcc 4.4.5 is not able to detect that it
is always initialized. */
clear_flag = has_option (line, "--clear");
help_flag = has_option (line, "--help");
host_flag = has_option (line, "--print-hosttable");
line = skip_options (line);
add_flag = !!*line;
@ -1389,6 +1391,13 @@ cmd_keyserver (assuan_context_t ctx, char *line)
goto leave;
}
if (host_flag)
{
ks_hkp_print_hosttable ();
err = 0;
goto leave;
}
if (add_flag)
{
item = xtrymalloc (sizeof *item + strlen (line));