1 files changed, 84 insertions, 0 deletions
diff --git a/agent/mibgroup/mibII/setSerialNo.c b/agent/mibgroup/mibII/setSerialNo.c
new file mode 100644
index 0000000..85a4098
--- /dev/null
+++ b/agent/mibgroup/mibII/setSerialNo.c
@@ -0,0 +1,84 @@
+/**  
+ *  This file implements the snmpSetSerialNo TestAndIncr counter
+ */
+#include <net-snmp/net-snmp-config.h>
+#include <net-snmp/net-snmp-features.h>
+#include <net-snmp/net-snmp-includes.h>
+#include <net-snmp/agent/net-snmp-agent-includes.h>
+
+netsnmp_feature_require(watcher_spinlock)
+
+
+#include "setSerialNo.h"
+
+/*
+ * A watched spinlock can be fully implemented by the spinlock helper,
+ *  but we still need a suitable variable to hold the value.
+ */
+static int     setserialno;
+
+    /*
+     * TestAndIncr values should persist across agent restarts,
+     * so we need config handling routines to load and save the
+     * current value (incrementing this whenever it's loaded).
+     */
+static void
+setserial_parse_config( const char *token, char *cptr )
+{
+    setserialno = atoi(cptr);
+    setserialno++;
+    DEBUGMSGTL(("snmpSetSerialNo",
+                "Re-setting SnmpSetSerialNo to %d\n", setserialno));
+}
+static int
+setserial_store_config( int a, int b, void *c, void *d )
+{
+    char line[SNMP_MAXBUF_SMALL];
+    snprintf(line, SNMP_MAXBUF_SMALL, "setserialno %d", setserialno);
+    snmpd_store_config( line );
+    return 0;
+}
+
+void
+init_setSerialNo(void)
+{
+    oid set_serial_oid[] = { 1, 3, 6, 1, 6, 3, 1, 1, 6, 1 };
+
+    /*
+     * If we can't retain the TestAndIncr value across an agent restart,
+     *  then it should be initialised to a pseudo-random value.  So set it
+     *  as such, before registering the config handlers to override this.
+     */
+#ifdef SVR4
+    setserialno = lrand48();
+#else
+    setserialno = random();
+#endif
+    DEBUGMSGTL(("snmpSetSerialNo",
+                "Initalizing SnmpSetSerialNo to %d\n", setserialno));
+    snmpd_register_config_handler("setserialno", setserial_parse_config,
+                                  NULL, "integer");
+    snmp_register_callback(SNMP_CALLBACK_LIBRARY, SNMP_CALLBACK_STORE_DATA,
+                           setserial_store_config, NULL);
+
+    /*
+     * Register 'setserialno' as a watched spinlock object
+     */
+#ifndef NETSNMP_NO_WRITE_SUPPORT
+    netsnmp_register_watched_spinlock(
+        netsnmp_create_handler_registration("snmpSetSerialNo", NULL,
+                                   set_serial_oid,
+                                   OID_LENGTH(set_serial_oid),
+                                   HANDLER_CAN_RWRITE),
+                                       &setserialno );
+#else  /* !NETSNMP_NO_WRITE_SUPPORT */
+    netsnmp_register_watched_spinlock(
+        netsnmp_create_handler_registration("snmpSetSerialNo", NULL,
+                                   set_serial_oid,
+                                   OID_LENGTH(set_serial_oid),
+                                   HANDLER_CAN_RONLY),
+                                       &setserialno );
+#endif /* !NETSNMP_NO_WRITE_SUPPORT */
+    DEBUGMSGTL(("scalar_int", "Done initalizing example scalar int\n"));
+}
+