net-snmp/SOURCES/net-snmp-5.8-sec-counter.patch

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2020-04-28 09:41:29 +00:00
diff -urNp a/include/net-snmp/library/snmpusm.h b/include/net-snmp/library/snmpusm.h
--- a/include/net-snmp/library/snmpusm.h 2020-03-16 09:54:29.883655600 +0100
+++ b/include/net-snmp/library/snmpusm.h 2020-03-16 09:55:24.142944520 +0100
@@ -43,6 +43,7 @@ extern "C" {
* Structures.
*/
struct usmStateReference {
+ int refcnt;
char *usr_name;
size_t usr_name_length;
u_char *usr_engine_id;
diff -urNp a/snmplib/snmp_client.c b/snmplib/snmp_client.c
--- a/snmplib/snmp_client.c 2020-03-16 09:54:29.892655813 +0100
+++ b/snmplib/snmp_client.c 2020-03-16 09:58:13.214021890 +0100
@@ -402,27 +402,16 @@ _clone_pdu_header(netsnmp_pdu *pdu)
return NULL;
}
- if (pdu->securityStateRef &&
- pdu->command == SNMP_MSG_TRAP2) {
-
- ret = usm_clone_usmStateReference((struct usmStateReference *) pdu->securityStateRef,
- (struct usmStateReference **) &newpdu->securityStateRef );
-
- if (ret)
- {
+ sptr = find_sec_mod(newpdu->securityModel);
+ if (sptr && sptr->pdu_clone) {
+ /* call security model if it needs to know about this */
+ ret = sptr->pdu_clone(pdu, newpdu);
+ if (ret) {
snmp_free_pdu(newpdu);
return NULL;
}
}
- if ((sptr = find_sec_mod(newpdu->securityModel)) != NULL &&
- sptr->pdu_clone != NULL) {
- /*
- * call security model if it needs to know about this
- */
- (*sptr->pdu_clone) (pdu, newpdu);
- }
-
return newpdu;
}
diff -urNp a/snmplib/snmpusm.c b/snmplib/snmpusm.c
--- a/snmplib/snmpusm.c 2020-03-16 09:54:29.894655860 +0100
+++ b/snmplib/snmpusm.c 2020-03-16 10:03:38.870027530 +0100
@@ -285,43 +285,64 @@ free_enginetime_on_shutdown(int majorid,
struct usmStateReference *
usm_malloc_usmStateReference(void)
{
- struct usmStateReference *retval = (struct usmStateReference *)
- calloc(1, sizeof(struct usmStateReference));
+ struct usmStateReference *retval;
+
+ retval = calloc(1, sizeof(struct usmStateReference));
+ if (retval)
+ retval->refcnt = 1;
return retval;
} /* end usm_malloc_usmStateReference() */
+static int
+usm_clone(netsnmp_pdu *pdu, netsnmp_pdu *new_pdu)
+{
+ struct usmStateReference *ref = pdu->securityStateRef;
+ struct usmStateReference **new_ref =
+ (struct usmStateReference **)&new_pdu->securityStateRef;
+ int ret = 0;
+
+ if (!ref)
+ return ret;
+
+ if (pdu->command == SNMP_MSG_TRAP2) {
+ netsnmp_assert(pdu->securityModel == SNMP_DEFAULT_SECMODEL);
+ ret = usm_clone_usmStateReference(ref, new_ref);
+ } else {
+ netsnmp_assert(ref == *new_ref);
+ ref->refcnt++;
+ }
+
+ return ret;
+}
+
void
usm_free_usmStateReference(void *old)
{
- struct usmStateReference *old_ref = (struct usmStateReference *) old;
+ struct usmStateReference *ref = old;
- if (old_ref) {
+ if (!ref)
+ return;
- if (old_ref->usr_name_length)
- SNMP_FREE(old_ref->usr_name);
- if (old_ref->usr_engine_id_length)
- SNMP_FREE(old_ref->usr_engine_id);
- if (old_ref->usr_auth_protocol_length)
- SNMP_FREE(old_ref->usr_auth_protocol);
- if (old_ref->usr_priv_protocol_length)
- SNMP_FREE(old_ref->usr_priv_protocol);
-
- if (old_ref->usr_auth_key_length && old_ref->usr_auth_key) {
- SNMP_ZERO(old_ref->usr_auth_key, old_ref->usr_auth_key_length);
- SNMP_FREE(old_ref->usr_auth_key);
- }
- if (old_ref->usr_priv_key_length && old_ref->usr_priv_key) {
- SNMP_ZERO(old_ref->usr_priv_key, old_ref->usr_priv_key_length);
- SNMP_FREE(old_ref->usr_priv_key);
- }
+ if (--ref->refcnt > 0)
+ return;
- SNMP_ZERO(old_ref, sizeof(*old_ref));
- SNMP_FREE(old_ref);
+ SNMP_FREE(ref->usr_name);
+ SNMP_FREE(ref->usr_engine_id);
+ SNMP_FREE(ref->usr_auth_protocol);
+ SNMP_FREE(ref->usr_priv_protocol);
+ if (ref->usr_auth_key_length && ref->usr_auth_key) {
+ SNMP_ZERO(ref->usr_auth_key, ref->usr_auth_key_length);
+ SNMP_FREE(ref->usr_auth_key);
+ }
+ if (ref->usr_priv_key_length && ref->usr_priv_key) {
+ SNMP_ZERO(ref->usr_priv_key, ref->usr_priv_key_length);
+ SNMP_FREE(ref->usr_priv_key);
}
+ SNMP_FREE(ref);
} /* end usm_free_usmStateReference() */
struct usmUser *
@@ -3316,6 +3337,7 @@ init_usm(void)
def->encode_reverse = usm_secmod_rgenerate_out_msg;
def->encode_forward = usm_secmod_generate_out_msg;
def->decode = usm_secmod_process_in_msg;
+ def->pdu_clone = usm_clone;
def->pdu_free_state_ref = usm_free_usmStateReference;
def->session_setup = usm_session_init;
def->handle_report = usm_handle_report;