linux下snmpset

.c和.h生成，上一篇总结文章里面已经说了，也是使用mib2c同样的方法。
这里只贴出来.c的模板代码，基本可以实现set操作。具体到每一个case处理，我还没有去深入的研究。

#include <net-snmp/net-snmp-config.h>
#include <net-snmp/net-snmp-includes.h>
#include <net-snmp/agent/net-snmp-agent-includes.h>
#include "confNewVersion.h"
#include<stdlib.h>
/** Initializes the confNewVersion module */
void
init_confNewVersion(void)
{
    const oid confNewVersion_oid[] = { 1,3,6,1,4,1,201566,1,6,3 };

  DEBUGMSGTL(("confNewVersion", "Initializing\n"));

    netsnmp_register_scalar(
        netsnmp_create_handler_registration("confNewVersion", handle_confNewVersion,
                               confNewVersion_oid, OID_LENGTH(confNewVersion_oid),
                               HANDLER_CAN_RWRITE
        ));
}
static char buff[256]="beijing";
/*void init_baseinfo(void)
{
    memset(buff,'\0',sizeof(buff));
    memcpy(buff,"beijing",sizeof(buff));
}*/
int
handle_confNewVersion(netsnmp_mib_handler *handler,
                          netsnmp_handler_registration *reginfo,
                          netsnmp_agent_request_info *reqinfo,
                          netsnmp_request_info *requests)
{
    int ret;
    char cmd[50];
    /* We are never called for a GETNEXT if it's registered as a
       "instance", as it's "magically" handled for us. */

    /* a instance handler also only hands us one request at a time, so
       we don't need to loop over a list of requests; we'll only get one. */

    switch(reqinfo->mode) {

        case MODE_GET:
            //1
            snmp_set_var_typed_value(requests->requestvb, ASN_OCTET_STR,
                                    buff /* XXX: a pointer to the scalar's data */,
                                     strlen(buff)/* XXX: the length of the data in bytes */);
            break;

        /*
         * SET REQUEST
         *
         * multiple states in the transaction. See:
         * http://www.net-snmp.org/tutorial-5/toolkit/mib_module/set-actions.jpg
         */
        case MODE_SET_RESERVE1:
            //1
            /* or you could use netsnmp_check_vb_type_and_size instead */
            ret = netsnmp_check_vb_type(requests->requestvb, ASN_OCTET_STR);
            if ( ret != SNMP_ERR_NOERROR ) {
                netsnmp_set_request_error(reqinfo, requests, ret );
            }
            break;

        case MODE_SET_RESERVE2:
            //1
            /* XXX malloc "undo" storage buffer */
            if (0/* XXX if malloc, or whatever, failed: */) {
                netsnmp_set_request_error(reqinfo, requests, SNMP_ERR_RESOURCEUNAVAILABLE);
            }
            break;

        case MODE_SET_FREE:
            //0
            /* XXX: free resources allocated in RESERVE1 and/or
               RESERVE2. Something failed somewhere, and the states
               below won't be called. */
            break;

        case MODE_SET_ACTION:
            /* XXX: perform the value change here */
            //1
            if (0/* XXX: error? */) {
                netsnmp_set_request_error(reqinfo, requests, SNMP_ERR_COMMITFAILED/* some error */);
            }
            break;

        case MODE_SET_COMMIT:
            /* XXX: delete temporary storage */
            memcpy(buff,requests->requestvb->buf,requests->requestvb->val_len);
            buff[requests->requestvb->val_len] ='\0';
            //1
            if (0/* XXX: error? */) {
                /* try _really_really_ hard to never get to this point */
                netsnmp_set_request_error(reqinfo, requests, SNMP_ERR_COMMITFAILED);
            }
            break;

        case MODE_SET_UNDO:
            /* XXX: UNDO and return to previous value for the object */
            if (0/* XXX: error? */) {
                /* try _really_really_ hard to never get to this point */
                netsnmp_set_request_error(reqinfo, requests, SNMP_ERR_UNDOFAILED);
            }
            break;

        default:
            /* we should never get here, so this is a really bad error */
            snmp_log(LOG_ERR, "unknown mode (%d) in handle_confNewVersion\n", reqinfo->mode );
            return SNMP_ERR_GENERR;
    }

    return SNMP_ERR_NOERROR;
}

代码同样的方法去编译运行。
通过命令：snmpset -c private -v 2c localhost confNewVersion.0 s hebei 去测试。