interfaces.c

一个学习SNMP项目：tmoerlan.

                long_return = 64000 * 30;
#else
#if NO_DUMMY_VALUES
            return NULL;
#endif
            long_return = (u_long) 10000000;
#endif
        }
        return (u_char *) & long_return;
    case IFPHYSADDRESS:
        Interface_Get_Ether_By_Index(interface, return_buf);
        *var_len = 6;
        if ((return_buf[0] == 0) && (return_buf[1] == 0) &&
            (return_buf[2] == 0) && (return_buf[3] == 0) &&
            (return_buf[4] == 0) && (return_buf[5] == 0))
            *var_len = 0;
        return (u_char *) return_buf;
    case IFADMINSTATUS:
        long_return = ifnet.if_flags & IFF_UP ? 1 : 2;
        return (u_char *) & long_return;
    case IFOPERSTATUS:
        long_return = ifnet.if_flags & IFF_RUNNING ? 1 : 2;
        return (u_char *) & long_return;
    case IFLASTCHANGE:
#if defined(STRUCT_IFNET_HAS_IF_LASTCHANGE_TV_SEC) && !(defined(freebsd2) && __FreeBSD_version < 199607)
        /*
         * XXX - SNMP's ifLastchange is time when op. status changed
         * * FreeBSD's if_lastchange is time when packet was input or output
         * * (at least in 2.1.0-RELEASE. Changed in later versions of the kernel?)
         */
        /*
         * FreeBSD's if_lastchange before the 2.1.5 release is the time when
         * * a packet was last input or output.  In the 2.1.5 and later releases,
         * * this is fixed, thus the 199607 comparison.
         */
        if (ifnet.if_lastchange.tv_sec == 0 &&
            ifnet.if_lastchange.tv_usec == 0)
            long_return = 0;
        else if (ifnet.if_lastchange.tv_sec < starttime.tv_sec)
            long_return = 0;
        else {
            long_return = (u_long)
                ((ifnet.if_lastchange.tv_sec - starttime.tv_sec) * 100
                 + (ifnet.if_lastchange.tv_usec -
                    starttime.tv_usec) / 10000);
        }
#else
#if NO_DUMMY_VALUES
        return NULL;
#endif
        long_return = 0;        /* XXX */
#endif
        return (u_char *) & long_return;
    case IFINOCTETS:
#ifdef STRUCT_IFNET_HAS_IF_IBYTES
        long_return = (u_long) ifnet.if_ibytes;
#else
#if NO_DUMMY_VALUES
        return NULL;
#endif
        long_return = (u_long) ifnet.if_ipackets * 308; /* XXX */
#endif
        return (u_char *) & long_return;
    case IFINUCASTPKTS:
        {
            long_return = (u_long) ifnet.if_ipackets;
#if STRUCT_IFNET_HAS_IF_IMCASTS
            long_return -= (u_long) ifnet.if_imcasts;
#endif
        }
        return (u_char *) & long_return;
    case IFINNUCASTPKTS:
#if STRUCT_IFNET_HAS_IF_IMCASTS
        long_return = (u_long) ifnet.if_imcasts;
#else
#if NO_DUMMY_VALUES
        return NULL;
#endif
        long_return = (u_long) 0;       /* XXX */
#endif
        return (u_char *) & long_return;
    case IFINDISCARDS:
#if STRUCT_IFNET_HAS_IF_IQDROPS
        long_return = (u_long) ifnet.if_iqdrops;
#else
#if NO_DUMMY_VALUES
        return NULL;
#endif
        long_return = (u_long) 0;       /* XXX */
#endif
        return (u_char *) & long_return;
    case IFINERRORS:
        long_return = (u_long) ifnet.if_ierrors;
        return (u_char *) & long_return;
    case IFINUNKNOWNPROTOS:
#if STRUCT_IFNET_HAS_IF_NOPROTO
        long_return = (u_long) ifnet.if_noproto;
#else
#if NO_DUMMY_VALUES
        return NULL;
#endif
        long_return = (u_long) 0;       /* XXX */
#endif
        return (u_char *) & long_return;
    case IFOUTOCTETS:
#ifdef STRUCT_IFNET_HAS_IF_OBYTES
        long_return = (u_long) ifnet.if_obytes;
#else
#if NO_DUMMY_VALUES
        return NULL;
#endif
        long_return = (u_long) ifnet.if_opackets * 308; /* XXX */
#endif
        return (u_char *) & long_return;
    case IFOUTUCASTPKTS:
        {
            long_return = (u_long) ifnet.if_opackets;
#if STRUCT_IFNET_HAS_IF_OMCASTS
            long_return -= (u_long) ifnet.if_omcasts;
#endif
        }
        return (u_char *) & long_return;
    case IFOUTNUCASTPKTS:
#if STRUCT_IFNET_HAS_IF_OMCASTS
        long_return = (u_long) ifnet.if_omcasts;
#else
#if NO_DUMMY_VALUES
        return NULL;
#endif
        long_return = (u_long) 0;       /* XXX */
#endif
        return (u_char *) & long_return;
    case IFOUTDISCARDS:
        long_return = ifnet.if_snd.ifq_drops;
        return (u_char *) & long_return;
    case IFOUTERRORS:
        long_return = ifnet.if_oerrors;
        return (u_char *) & long_return;
    case IFOUTQLEN:
        long_return = ifnet.if_snd.ifq_len;
        return (u_char *) & long_return;
    case IFSPECIFIC:
        *var_len = nullOidLen;
        return (u_char *) nullOid;
    default:
        DEBUGMSGTL(("snmpd", "unknown sub-id %d in var_ifEntry\n",
                    vp->magic));
    }
    return NULL;
}

#else                           /* hpux */

u_char         *
var_ifEntry(struct variable *vp,
            oid * name,
            size_t * length,
            int exact, size_t * var_len, WriteMethod ** write_method)
{
#if defined(hpux11)
    static nmapi_phystat ifnet;
#else
    static struct ifnet ifnet;
#endif
    register int    interface;
#if !defined(hpux11)
    static struct in_ifaddr in_ifaddrVar;
#endif
#if defined(hpux11)
    static char     Name[MAX_PHYSADDR_LEN];
#else
    static char     Name[16];
#endif
    register char  *cp;
#if STRUCT_IFNET_HAS_IF_LASTCHANGE_TV_SEC
    struct timeval  now;
#endif
#if !defined(hpux11)
    struct nmparms  hp_nmparms;
    static mib_ifEntry hp_ifEntry;
    int             hp_fd;
    int             hp_len = sizeof(hp_ifEntry);
#endif


    interface =
        header_ifEntry(vp, name, length, exact, var_len, write_method);
    if (interface == MATCH_FAILED)
        return NULL;

#if defined(hpux11)
    Interface_Scan_By_Index(interface, Name, &ifnet);
#else
    Interface_Scan_By_Index(interface, Name, &ifnet, &in_ifaddrVar);
#endif

#if !defined(hpux11)
    /*
     * Additional information about the interfaces is available under
     * HP-UX through the network management interface '/dev/netman'
     */
    hp_ifEntry.ifIndex = interface;
    hp_nmparms.objid = ID_ifEntry;
    hp_nmparms.buffer = (char *) &hp_ifEntry;
    hp_nmparms.len = &hp_len;
    if ((hp_fd = open("/dev/netman", O_RDONLY)) != -1) {
        if (ioctl(hp_fd, NMIOGET, &hp_nmparms) != -1) {
            close(hp_fd);
        } else {
            close(hp_fd);
            hp_fd = -1;         /* failed */
        }
    }
#endif

    switch (vp->magic) {
    case IFINDEX:
        long_return = interface;
        return (u_char *) & long_return;
    case IFDESCR:
#if defined(hpux11)
        cp = ifnet.if_entry.ifDescr;
#else
        if (hp_fd != -1)
            cp = hp_ifEntry.ifDescr;
        else
            cp = Name;
#endif
        *var_len = strlen(cp);
        return (u_char *) cp;
    case IFTYPE:
#if defined(hpux11)
        long_return = ifnet.if_entry.ifType;
#else
        if (hp_fd != -1)
            long_return = hp_ifEntry.ifType;
        else
            long_return = 1;    /* OTHER */
#endif
        return (u_char *) & long_return;
    case IFMTU:{
#if defined(hpux11)
            long_return = (long) ifnet.if_entry.ifMtu;
#else
            long_return = (long) ifnet.if_mtu;
#endif
            return (u_char *) & long_return;
        }
    case IFSPEED:
#if defined(hpux11)
        long_return = ifnet.if_entry.ifSpeed;
#else
        if (hp_fd != -1)
            long_return = hp_ifEntry.ifSpeed;
        else
            long_return = (u_long) 1;   /* OTHER */
#endif
        return (u_char *) & long_return;
    case IFPHYSADDRESS:
#if defined(hpux11)
        *var_len = ifnet.if_entry.ifPhysAddress.o_length;
        return (u_char *) ifnet.if_entry.ifPhysAddress.o_bytes;
#else
        Interface_Get_Ether_By_Index(interface, return_buf);
        *var_len = 6;
        if ((return_buf[0] == 0) && (return_buf[1] == 0) &&
            (return_buf[2] == 0) && (return_buf[3] == 0) &&
            (return_buf[4] == 0) && (return_buf[5] == 0))
            *var_len = 0;
        return (u_char *) return_buf;
#endif
    case IFADMINSTATUS:
#if defined(hpux11)
        long_return = ifnet.if_entry.ifAdmin;
#else
        long_return = ifnet.if_flags & IFF_UP ? 1 : 2;
#endif
        return (u_char *) & long_return;
    case IFOPERSTATUS:
#if defined(hpux11)
        long_return = ifnet.if_entry.ifOper;
#else
        long_return = ifnet.if_flags & IFF_RUNNING ? 1 : 2;
#endif
        return (u_char *) & long_return;
    case IFLASTCHANGE:
#if defined(hpux11)
        long_return = ifnet.if_entry.ifLastChange;
#else
        if (hp_fd != -1)
            long_return = hp_ifEntry.ifLastChange;
        else
            long_return = 0;    /* XXX */
#endif
        return (u_char *) & long_return;
    case IFINOCTETS:
#if defined(hpux11)
        long_return = ifnet.if_entry.ifInOctets;
#else
        if (hp_fd != -1)
            long_return = hp_ifEntry.ifInOctets;
        else
            long_return = (u_long) ifnet.if_ipackets * 308;     /* XXX */
#endif
        return (u_char *) & long_return;
    case IFINUCASTPKTS:
#if defined(hpux11)
        long_return = ifnet.if_entry.ifInUcastPkts;
#else
        if (hp_fd != -1)
            long_return = hp_ifEntry.ifInUcastPkts;
        else
            long_return = (u_long) ifnet.if_ipackets;
#endif
        return (u_char *) & long_return;
    case IFINNUCASTPKTS:
#if defined(hpux11)
        long_return = ifnet.if_entry.ifInNUcastPkts;
#else
        if (hp_fd != -1)
            long_return = hp_ifEntry.ifInNUcastPkts;
        else
            long_return = (u_long) 0;   /* XXX */
#endif
        return (u_char *) & long_return;
    case IFINDISCARDS:
#if defined(hpux11)
        long_return = ifnet.if_entry.ifInDiscards;
#else
        if (hp_fd != -1)
            long_return = hp_ifEntry.ifInDiscards;
        else
            long_return = (u_long) 0;   /* XXX */
#endif
        return (u_char *) & long_return;
    case IFINERRORS:
#if defined(hpux11)
        long_return = ifnet.if_entry.ifInErrors;
#else
        long_return = ifnet.if_ierrors;
#endif
        return (u_char *) & long_return;
    case IFINUNKNOWNPROTOS:
#if defined(hpux11)
        long_return = ifnet.if_entry.ifInUnknownProtos;
#else
        if (hp_fd != -1)
            long_return = hp_ifEntry.ifInUnknownProtos;
        else
            long_return = (u_long) 0;   /* XXX */
#endif
        return (u_char *) & long_return;
    case IFOUTOCTETS:
#if defined(hpux11)
        long_return = ifnet.if_entry.ifOutOctets;
#else
        if (hp_fd != -1)
            long_return = hp_ifEntry.ifOutOctets;
        else
            long_return = (u_long) ifnet.if_opackets * 308;     /* XXX */
#endif
        return (u_char *) & long_return;
    case IFOUTUCASTPKTS:
#if defined(hpux11)
        long_return = ifnet.if_entry.ifOutUcastPkts;
#else
        if (hp_fd != -1)
            long_return = hp_ifEntry.ifOutUcastPkts;
        else
            long_return = (u_long) ifnet.if_opackets;
#endif
        return (u_char *) & long_return;
    case IFOUTNUCASTPKTS:
#if defined(hpux11)
        long_return = ifnet.if_entry.ifOutNUcastPkts;
#else
        if (hp_fd != -1)
            long_return = hp_ifEntry.ifOutNUcastPkts;
        else
            long_return = (u_long) 0;   /* XXX */
#endif
        return (u_char *) & long_return;
    case IFOUTDISCARDS:
#if defined(hpux11)
        long_return = ifnet.if_entry.ifOutDiscards;
#else
        long_return = ifnet.if_snd.ifq_drops;
#endif
        return (u_char *) & long_return;
    case IFOUTERRORS:
#if defined(hpux11)
        long_return = ifnet.if_entry.ifOutErrors;
#else
        long_return = ifnet.if_oerrors;
#endif
        return (u_char *) & long_return;
    case IFOUTQLEN:
#if defined(hpux11)
        long_return = ifnet.if_entry.ifOutQlen;
#else
        long_return = ifnet.if_snd.ifq_len;
#endif
        return (u_char *) & long_return;
    case IFSPECIFIC:
        *var_len = nullOidLen;
        return (u_char *) nullOid;
    default:
        DEBUGMSGTL(("snmpd", "unknown sub-id %d in var_ifEntry\n",
                    vp->magic));
    }
    return NULL;
}

#endif                          /* hpux */
#else                           /* solaris2 */

static int
IF_cmp(void *addr, void *ep)
{
    DEBUGMSGTL(("mibII/interfaces", "... IF_cmp %d %d\n",
                ((mib2_ifEntry_t *) ep)->ifIndex,
                ((mib2_ifEntry_t *) addr)->ifIndex));
    if (((mib2_ifEntry_t *) ep)->ifIndex ==
        ((mib2_ifEntry_t *) addr)->ifIndex)
        return (0);
    else
        return (1);
}

u_char         *
var_ifEntry(struct variable * vp,
            oid * name,
            size_t * length,
            int exact, size_t * var_len, WriteMethod ** write_method)
{
    int             interface;
    mib2_ifEntry_t  ifstat;


    interface =
        header_ifEntry(vp, name, length, exact, var_len, write_method);
    if (interface == MATCH_FAILED)
        return NULL;

    if (getMibstat(MIB_INTERFACES, &ifstat, sizeof(mib2_ifEntry_t),
                   GET_EXACT, &IF_cmp, &interface) != 0) {
        DEBUGMSGTL(("mibII/interfaces", "... no mib stats\n"));
        return NULL;
    }
    switch (vp->magic) {
    case IFINDEX:
        long_return = ifstat.ifIndex;
        return (u_char *) & long_return;
    case IFDESCR:
        *var_len = ifstat.ifDescr.o_length;
        (void) memcpy(return_buf, ifstat.ifDescr.o_bytes, *var_len);
        return (u_char *) return_buf;
    case IFTYPE:
        long_return = (u_long) ifstat.ifType;