snmplib/cmu_compat.c

#include <net-snmp/net-snmp-config.h>

#ifdef CMU_COMPATIBLE

#include <net-snmp/mib_api.h>
#include <net-snmp/pdu_api.h>
#include <net-snmp/session_api.h>

int
mib_TxtToOid(char *Buf, oid ** OidP, size_t * LenP)
{
    return read_objid(Buf, *OidP, LenP);
}

int
mib_OidToTxt(oid * O, size_t OidLen, char *Buf, size_t BufLen)
{
    _sprint_objid(Buf, O, OidLen);
    return 1;
}


/*
 * cmu_snmp_parse - emulate CMU library's snmp_parse.
 *
 * Parse packet, storing results into PDU.
 * Returns community string if success, NULL if fail.
 * WARNING: may return a zero length community string.
 *
 * Note:
 * Some CMU-aware apps call init_mib(), but do not
 * initialize a session.
 * Check Reqid to make sure that this module is initialized.
 */

u_char         *
cmu_snmp_parse(netsnmp_session * session,
               netsnmp_pdu *pdu, u_char * data, size_t length)
{
    u_char         *bufp = NULL;

    snmp_sess_init(session);    /* gimme a break! */

    switch (pdu->version) {
    case SNMP_VERSION_1:
    case SNMP_VERSION_2c:
    case SNMP_DEFAULT_VERSION:
        break;
    default:
        return NULL;
    }
#ifndef NO_INTERNAL_VARLIST
    if (snmp_parse(0, session, pdu, data, length) != SNMP_ERR_NOERROR) {
        return NULL;
    }
#else
    /*
     * while there are two versions of variable_list:
     * use an internal variable list for snmp_parse;
     * clone the result.
     */
    if (1) {
        netsnmp_pdu    *snmp_clone_pdu(netsnmp_pdu *);
        netsnmp_pdu    *snmp_2clone_pdu(netsnmp_pdu *from_pdu,
                                        netsnmp_pdu *to_pdu);

        netsnmp_pdu    *ipdu;
        ipdu = snmp_clone_pdu(pdu);
        if (snmp_parse(0, session, ipdu, data, length) != SNMP_ERR_NOERROR) {
            snmp_free_internal_pdu(ipdu);
            return NULL;
        }
        pdu = snmp_2clone_pdu(ipdu, pdu);
        snmp_free_internal_pdu(ipdu);
    }
#endif                          /* NO_INTERNAL_VAR_LIST */

    /*
     * Add a null to meet the caller's expectations. 
     */

    bufp = (u_char *) malloc(1 + pdu->community_len);
    if (bufp && pdu->community_len) {
        memcpy(bufp, pdu->community, pdu->community_len);
        bufp[pdu->community_len] = '\0';
    }
    return (bufp);
}


#endif                          /* CMU_COMPATIBLE */