Blame SOURCES/0072-Ticket-571-dup-47361-Empty-control-list-causes-LDAP-.patch

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From d695afb6a637432e880296d8552f466981c0796c Mon Sep 17 00:00:00 2001
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From: "Thierry bordaz (tbordaz)" <tbordaz@redhat.com>
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Date: Thu, 16 May 2013 15:28:47 +0200
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Subject: [PATCH 72/78] Ticket 571 (dup 47361) - Empty control list causes LDAP
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 protocol error is thrown
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Bug Description:
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	If a request contains a list of controls containing zero control, it does
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	not conform RFC http://tools.ietf.org/html/rfc4511#section-4.1.11. Then the
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	server returns a Protocol Error.
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	This is too restrictive for some applications.
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	Note: such application needs to be linked with old version of mozldap or openldap
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	because recent version skip sending empty list of controls
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Fix Description:
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	The fix is to ignore this error and let the operation complete
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	Note: ticket 571 (bz 918717) is a duplicate of 47361 (bz 963234). 47361 was used to
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	backport in 1.2.11. 571 is used to backport in 1.3.1.
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	This bug is fixed since 1.3.2
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https://fedorahosted.org/389/ticket/571
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https://fedorahosted.org/389/ticket/47361
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Reviewed by: Rich Megginson (thanks Rich !)
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Platforms tested: F17 (unit + acceptance vlv/proxy/managed/psearch/tls/bindcontrol)
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Flag Day: no
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Doc impact: no
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(cherry picked from commit dea2a254117f1e9f4be1068c6784b2780fec933f)
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---
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 ldap/servers/slapd/control.c | 32 +++++++++++++++++++++-----------
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 1 file changed, 21 insertions(+), 11 deletions(-)
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diff --git a/ldap/servers/slapd/control.c b/ldap/servers/slapd/control.c
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index fc3ab9f..e614d50 100644
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--- a/ldap/servers/slapd/control.c
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+++ b/ldap/servers/slapd/control.c
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@@ -354,17 +354,27 @@ get_ldapmessage_controls_ext(
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 		len = -1; /* reset for next loop iter */
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 	}
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-	if ( (tag != LBER_END_OF_SEQORSET) && (len != -1) ) {
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-		goto free_and_return;
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-	}
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-
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-	slapi_pblock_set( pb, SLAPI_REQCONTROLS, ctrls );
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-	managedsait = slapi_control_present( ctrls,
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-	    LDAP_CONTROL_MANAGEDSAIT, NULL, NULL );
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-	slapi_pblock_set( pb, SLAPI_MANAGEDSAIT, &managedsait );
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-	pwpolicy_ctrl = slapi_control_present( ctrls,
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-	    LDAP_X_CONTROL_PWPOLICY_REQUEST, NULL, NULL );
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-	slapi_pblock_set( pb, SLAPI_PWPOLICY, &pwpolicy_ctrl );
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+        if (curcontrols == 0) {
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+                int ctrl_not_found = 0; /* means that a given control is not present in the request */
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+                
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+                slapi_pblock_set(pb, SLAPI_REQCONTROLS, NULL);
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+                slapi_pblock_set(pb, SLAPI_MANAGEDSAIT, &ctrl_not_found);
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+                slapi_pblock_set(pb, SLAPI_PWPOLICY, &ctrl_not_found);
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+                slapi_log_error(SLAPI_LOG_CONNS, "connection", "Warning: conn=%d op=%d contains an empty list of controls\n",
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+                        pb->pb_conn->c_connid, pb->pb_op->o_opid);
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+        } else {
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+                if ((tag != LBER_END_OF_SEQORSET) && (len != -1)) {
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+                        goto free_and_return;
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+                }
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+
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+                slapi_pblock_set(pb, SLAPI_REQCONTROLS, ctrls);
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+                managedsait = slapi_control_present(ctrls,
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+                        LDAP_CONTROL_MANAGEDSAIT, NULL, NULL);
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+                slapi_pblock_set(pb, SLAPI_MANAGEDSAIT, &managedsait);
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+                pwpolicy_ctrl = slapi_control_present(ctrls,
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+                        LDAP_X_CONTROL_PWPOLICY_REQUEST, NULL, NULL);
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+                slapi_pblock_set(pb, SLAPI_PWPOLICY, &pwpolicy_ctrl);
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+        }
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 	if ( controlsp != NULL ) {
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 		*controlsp = ctrls;
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-- 
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1.8.1.4
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