/* * Copyright (c) 2001-2003 * Fraunhofer Institute for Open Communication Systems (FhG Fokus). * All rights reserved. * * Author: Harti Brandt * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $Begemot: bsnmp/snmp_mibII/mibII.h,v 1.16 2006/02/14 09:04:19 brandt_h Exp $ * * Implementation of the interfaces and IP groups of MIB-II. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "asn1.h" #include "snmp.h" #include "snmpmod.h" #include "snmp_mibII.h" #include "mibII_tree.h" /* maximum size of the interface alias */ #define MIBIF_ALIAS_SIZE (64 + 1) /* * Interface list and flags. */ TAILQ_HEAD(mibif_list, mibif); enum { MIBIF_FOUND = 0x0001, MIBIF_HIGHSPEED = 0x0002, MIBIF_VERYHIGHSPEED = 0x0004, }; /* * Private mibif data - hang off from the mibif. */ struct mibif_private { uint64_t hc_inoctets; uint64_t hc_outoctets; uint64_t hc_omcasts; uint64_t hc_opackets; uint64_t hc_imcasts; uint64_t hc_ipackets; /* this should be made public */ char alias[MIBIF_ALIAS_SIZE]; }; #define MIBIF_PRIV(IFP) ((struct mibif_private *)((IFP)->private)) /* * Interface addresses. */ TAILQ_HEAD(mibifa_list, mibifa); enum { MIBIFA_FOUND = 0x0001, MIBIFA_DESTROYED = 0x0002, }; /* * Receive addresses */ TAILQ_HEAD(mibrcvaddr_list, mibrcvaddr); enum { MIBRCVADDR_FOUND = 0x00010000, }; /* * Interface index mapping. The problem here is, that if the same interface * is reinstantiated (for examble by unloading and loading the hardware driver) * we must use the same index for this interface. For dynamic interfaces * (clip, lane) we must use a fresh index, each time a new interface is created. * To differentiate between these types of interfaces we use the following table * which contains an entry for each dynamic interface type. All other interface * types are supposed to be static. The mibindexmap contains an entry for * all interfaces. The mibif pointer is NULL, if the interface doesn't exist * anymore. */ struct mibdynif { SLIST_ENTRY(mibdynif) link; char name[IFNAMSIZ]; }; SLIST_HEAD(mibdynif_list, mibdynif); struct mibindexmap { STAILQ_ENTRY(mibindexmap) link; u_short sysindex; u_int ifindex; struct mibif *mibif; /* may be NULL */ char name[IFNAMSIZ]; }; STAILQ_HEAD(mibindexmap_list, mibindexmap); /* * Interface stacking. The generic code cannot know how the interfaces stack. * For this reason it instantiates only the x.0 and 0.x table elements. All * others have to be instantiated by the interface specific modules. * The table is read-only. */ struct mibifstack { TAILQ_ENTRY(mibifstack) link; struct asn_oid index; }; TAILQ_HEAD(mibifstack_list, mibifstack); /* * NetToMediaTable (ArpTable) */ struct mibarp { TAILQ_ENTRY(mibarp) link; struct asn_oid index; /* contains both the ifindex and addr */ u_char phys[128]; /* the physical address */ u_int physlen; /* and its length */ u_int flags; }; TAILQ_HEAD(mibarp_list, mibarp); enum { MIBARP_FOUND = 0x00010000, MIBARP_PERM = 0x00000001, }; /* * New if registrations */ struct newifreg { TAILQ_ENTRY(newifreg) link; const struct lmodule *mod; int (*func)(struct mibif *); }; TAILQ_HEAD(newifreg_list, newifreg); /* list of all IP addresses */ extern struct mibifa_list mibifa_list; /* list of all interfaces */ extern struct mibif_list mibif_list; /* list of dynamic interface names */ extern struct mibdynif_list mibdynif_list; /* list of all interface index mappings */ extern struct mibindexmap_list mibindexmap_list; /* list of all stacking entries */ extern struct mibifstack_list mibifstack_list; /* list of all receive addresses */ extern struct mibrcvaddr_list mibrcvaddr_list; /* list of all NetToMedia entries */ extern struct mibarp_list mibarp_list; /* number of interfaces */ extern int32_t mib_if_number; /* last change of interface table */ extern uint64_t mib_iftable_last_change; /* last change of stack table */ extern uint64_t mib_ifstack_last_change; /* if this is set, one of our lists may be bad. refresh them when idle */ extern int mib_iflist_bad; /* last time refreshed */ extern uint64_t mibarpticks; /* info on system clocks */ extern struct clockinfo clockinfo; /* baud rate of fastest interface */ extern uint64_t mibif_maxspeed; /* user-forced update interval */ extern u_int mibif_force_hc_update_interval; /* current update interval */ extern u_int mibif_hc_update_interval; /* re-compute update interval */ void mibif_reset_hc_timer(void); /* interfaces' data poll interval */ extern u_int mibII_poll_ticks; /* restart the data poll timer */ void mibif_restart_mibII_poll_timer(void); #define MIBII_POLL_TICKS 100 /* get interfaces and interface addresses. */ void mib_fetch_interfaces(void); /* check whether this interface(type) is dynamic */ int mib_if_is_dyn(const char *name); /* destroy an interface address */ int mib_destroy_ifa(struct mibifa *); /* restituate a deleted interface address */ void mib_undestroy_ifa(struct mibifa *); /* change interface address */ int mib_modify_ifa(struct mibifa *); /* undo if address modification */ void mib_unmodify_ifa(struct mibifa *); /* create an interface address */ struct mibifa * mib_create_ifa(u_int ifindex, struct in_addr addr, struct in_addr mask, struct in_addr bcast); /* delete a freshly created address */ void mib_uncreate_ifa(struct mibifa *); /* create/delete arp entries */ struct mibarp *mib_arp_create(const struct mibif *, struct in_addr, const u_char *, size_t); void mib_arp_delete(struct mibarp *); /* find arp entry */ struct mibarp *mib_find_arp(const struct mibif *, struct in_addr); /* update arp table */ void mib_arp_update(void); /* fetch routing table */ u_char *mib_fetch_rtab(int af, int info, int arg, size_t *lenp); /* process routing message */ void mib_sroute_process(struct rt_msghdr *, struct sockaddr *, struct sockaddr *, struct sockaddr *); /* send a routing message */ void mib_send_rtmsg(struct rt_msghdr *, struct sockaddr *, struct sockaddr *, struct sockaddr *); /* extract addresses from routing message */ void mib_extract_addrs(int, u_char *, struct sockaddr **); /* fetch routing table */ int mib_fetch_route(void);