Imported Upstream version 5.7.2~dfsg

1 files changed, 80 insertions, 0 deletions

diff --git a/agent/helpers/read_only.c b/agent/helpers/read_only.c
new file mode 100644
index 0000000..0b06d4f
--- /dev/null
+++ b/agent/helpers/read_only.c
@@ -0,0 +1,80 @@
+#include <net-snmp/net-snmp-config.h>
+
+#include <net-snmp/net-snmp-includes.h>
+#include <net-snmp/agent/net-snmp-agent-includes.h>
+
+#include <net-snmp/agent/read_only.h>
+
+/** @defgroup read_only read_only
+ *  Make your handler read_only automatically 
+ *  The only purpose of this handler is to return an
+ *  appropriate error for any requests passed to it in a SET mode.
+ *  Inserting it into your handler chain will ensure you're never
+ *  asked to perform a SET request so you can ignore those error
+ *  conditions.
+ *  @ingroup utilities
+ *  @{
+ */
+
+/** returns a read_only handler that can be injected into a given
+ *  handler chain.
+ */
+netsnmp_mib_handler *
+netsnmp_get_read_only_handler(void)
+{
+    netsnmp_mib_handler *ret = NULL;
+    
+    ret = netsnmp_create_handler("read_only",
+                                 netsnmp_read_only_helper);
+    if (ret) {
+        ret->flags |= MIB_HANDLER_AUTO_NEXT;
+    }
+    return ret;
+}
+
+/** @internal Implements the read_only handler */
+int
+netsnmp_read_only_helper(netsnmp_mib_handler *handler,
+                         netsnmp_handler_registration *reginfo,
+                         netsnmp_agent_request_info *reqinfo,
+                         netsnmp_request_info *requests)
+{
+
+    DEBUGMSGTL(("helper:read_only", "Got request\n"));
+
+    switch (reqinfo->mode) {
+
+#ifndef NETSNMP_NO_WRITE_SUPPORT
+    case MODE_SET_RESERVE1:
+    case MODE_SET_RESERVE2:
+    case MODE_SET_ACTION:
+    case MODE_SET_COMMIT:
+    case MODE_SET_FREE:
+    case MODE_SET_UNDO:
+        netsnmp_request_set_error_all(requests, SNMP_ERR_NOTWRITABLE);
+        return SNMP_ERR_NOTWRITABLE;
+#endif /* NETSNMP_NO_WRITE_SUPPORT */
+
+    case MODE_GET:
+    case MODE_GETNEXT:
+    case MODE_GETBULK:
+        /* next handler called automatically - 'AUTO_NEXT' */
+        return SNMP_ERR_NOERROR;
+    }
+
+    netsnmp_request_set_error_all(requests, SNMP_ERR_GENERR);
+    return SNMP_ERR_GENERR;
+}
+
+/** initializes the read_only helper which then registers a read_only
+ *  handler as a run-time injectable handler for configuration file
+ *  use.
+ */
+void
+netsnmp_init_read_only_helper(void)
+{
+    netsnmp_register_handler_by_name("read_only",
+                                     netsnmp_get_read_only_handler());
+}
+/**  @} */
+