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#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());
}
/** @} */
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