2677 lines
64 KiB
C
2677 lines
64 KiB
C
/* $OpenBSD: ip_carp.c,v 1.361 2024/02/13 12:22:09 bluhm Exp $ */
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/*
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* Copyright (c) 2002 Michael Shalayeff. All rights reserved.
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* Copyright (c) 2003 Ryan McBride. All rights reserved.
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* Copyright (c) 2006-2008 Marco Pfatschbacher. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* TODO:
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* - iface reconfigure
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* - support for hardware checksum calculations;
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*
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*/
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#include "ether.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/timeout.h>
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#include <sys/ioctl.h>
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#include <sys/errno.h>
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#include <sys/device.h>
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#include <sys/kernel.h>
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#include <sys/sysctl.h>
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#include <sys/syslog.h>
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#include <sys/refcnt.h>
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#include <net/if.h>
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#include <net/if_var.h>
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#include <net/if_types.h>
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#include <net/netisr.h>
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#include <net/route.h>
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#include <crypto/sha1.h>
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#include <netinet/in.h>
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#include <netinet/in_var.h>
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#include <netinet/ip.h>
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#include <netinet/ip_var.h>
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#include <netinet/if_ether.h>
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#include <netinet/ip_ipsp.h>
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#include <net/if_dl.h>
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#ifdef INET6
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#include <netinet6/in6_var.h>
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#include <netinet/icmp6.h>
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#include <netinet/ip6.h>
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#include <netinet6/ip6_var.h>
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#include <netinet6/nd6.h>
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#include <netinet6/in6_ifattach.h>
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#endif
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#include "bpfilter.h"
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#if NBPFILTER > 0
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#include <net/bpf.h>
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#endif
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#include "vlan.h"
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#if NVLAN > 0
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#include <net/if_vlan_var.h>
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#endif
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#include <netinet/ip_carp.h>
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struct carp_mc_entry {
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LIST_ENTRY(carp_mc_entry) mc_entries;
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union {
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struct ether_multi *mcu_enm;
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} mc_u;
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struct sockaddr_storage mc_addr;
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};
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#define mc_enm mc_u.mcu_enm
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enum { HMAC_ORIG=0, HMAC_NOV6LL=1, HMAC_MAX=2 };
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struct carp_vhost_entry {
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SRPL_ENTRY(carp_vhost_entry) vhost_entries;
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struct refcnt vhost_refcnt;
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struct carp_softc *parent_sc;
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int vhe_leader;
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int vhid;
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int advskew;
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enum { INIT = 0, BACKUP, MASTER } state;
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struct timeout ad_tmo; /* advertisement timeout */
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struct timeout md_tmo; /* master down timeout */
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struct timeout md6_tmo; /* master down timeout */
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u_int64_t vhe_replay_cookie;
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/* authentication */
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#define CARP_HMAC_PAD 64
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unsigned char vhe_pad[CARP_HMAC_PAD];
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SHA1_CTX vhe_sha1[HMAC_MAX];
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u_int8_t vhe_enaddr[ETHER_ADDR_LEN];
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};
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void carp_vh_ref(void *, void *);
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void carp_vh_unref(void *, void *);
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struct srpl_rc carp_vh_rc =
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SRPL_RC_INITIALIZER(carp_vh_ref, carp_vh_unref, NULL);
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struct carp_softc {
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struct arpcom sc_ac;
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#define sc_if sc_ac.ac_if
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#define sc_carpdevidx sc_ac.ac_if.if_carpdevidx
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struct task sc_atask;
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struct task sc_ltask;
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struct task sc_dtask;
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struct ip_moptions sc_imo;
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#ifdef INET6
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struct ip6_moptions sc_im6o;
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#endif /* INET6 */
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SRPL_ENTRY(carp_softc) sc_list;
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struct refcnt sc_refcnt;
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int sc_suppress;
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int sc_bow_out;
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int sc_demote_cnt;
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int sc_sendad_errors;
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#define CARP_SENDAD_MAX_ERRORS(sc) (3 * (sc)->sc_vhe_count)
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int sc_sendad_success;
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#define CARP_SENDAD_MIN_SUCCESS(sc) (3 * (sc)->sc_vhe_count)
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char sc_curlladdr[ETHER_ADDR_LEN];
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SRPL_HEAD(, carp_vhost_entry) carp_vhosts;
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int sc_vhe_count;
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u_int8_t sc_vhids[CARP_MAXNODES];
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u_int8_t sc_advskews[CARP_MAXNODES];
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u_int8_t sc_balancing;
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int sc_naddrs;
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int sc_naddrs6;
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int sc_advbase; /* seconds */
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/* authentication */
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unsigned char sc_key[CARP_KEY_LEN];
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u_int32_t sc_hashkey[2];
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u_int32_t sc_lsmask; /* load sharing mask */
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int sc_lscount; /* # load sharing interfaces (max 32) */
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int sc_delayed_arp; /* delayed ARP request countdown */
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int sc_realmac; /* using real mac */
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struct in_addr sc_peer;
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LIST_HEAD(__carp_mchead, carp_mc_entry) carp_mc_listhead;
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struct carp_vhost_entry *cur_vhe; /* current active vhe */
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};
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void carp_sc_ref(void *, void *);
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void carp_sc_unref(void *, void *);
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struct srpl_rc carp_sc_rc =
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SRPL_RC_INITIALIZER(carp_sc_ref, carp_sc_unref, NULL);
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int carp_opts[CARPCTL_MAXID] = { 0, 1, 0, LOG_CRIT }; /* XXX for now */
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struct cpumem *carpcounters;
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int carp_send_all_recur = 0;
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#define CARP_LOG(l, sc, s) \
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do { \
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if (carp_opts[CARPCTL_LOG] >= l) { \
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if (sc) \
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log(l, "%s: ", \
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(sc)->sc_if.if_xname); \
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else \
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log(l, "carp: "); \
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addlog s; \
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addlog("\n"); \
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} \
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} while (0)
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void carp_hmac_prepare(struct carp_softc *);
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void carp_hmac_prepare_ctx(struct carp_vhost_entry *, u_int8_t);
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void carp_hmac_generate(struct carp_vhost_entry *, u_int32_t *,
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unsigned char *, u_int8_t);
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int carp_hmac_verify(struct carp_vhost_entry *, u_int32_t *,
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unsigned char *);
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void carp_proto_input_c(struct ifnet *, struct mbuf *,
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struct carp_header *, int, sa_family_t);
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int carp_proto_input_if(struct ifnet *, struct mbuf **, int *, int);
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#ifdef INET6
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int carp6_proto_input_if(struct ifnet *, struct mbuf **, int *, int);
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#endif
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void carpattach(int);
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void carpdetach(void *);
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void carp_prepare_ad(struct mbuf *, struct carp_vhost_entry *,
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struct carp_header *);
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void carp_send_ad_all(void);
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void carp_vhe_send_ad_all(struct carp_softc *);
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void carp_timer_ad(void *);
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void carp_send_ad(struct carp_vhost_entry *);
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void carp_send_arp(struct carp_softc *);
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void carp_timer_down(void *);
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void carp_master_down(struct carp_vhost_entry *);
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int carp_ioctl(struct ifnet *, u_long, caddr_t);
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int carp_vhids_ioctl(struct carp_softc *, struct carpreq *);
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int carp_check_dup_vhids(struct carp_softc *, struct srpl *,
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struct carpreq *);
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void carp_ifgroup_ioctl(struct ifnet *, u_long, caddr_t);
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void carp_ifgattr_ioctl(struct ifnet *, u_long, caddr_t);
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void carp_start(struct ifnet *);
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int carp_enqueue(struct ifnet *, struct mbuf *);
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void carp_transmit(struct carp_softc *, struct ifnet *, struct mbuf *);
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void carp_setrun_all(struct carp_softc *, sa_family_t);
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void carp_setrun(struct carp_vhost_entry *, sa_family_t);
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void carp_set_state_all(struct carp_softc *, int);
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void carp_set_state(struct carp_vhost_entry *, int);
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void carp_multicast_cleanup(struct carp_softc *);
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int carp_set_ifp(struct carp_softc *, struct ifnet *);
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void carp_set_enaddr(struct carp_softc *);
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void carp_set_vhe_enaddr(struct carp_vhost_entry *);
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void carp_addr_updated(void *);
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int carp_set_addr(struct carp_softc *, struct sockaddr_in *);
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int carp_join_multicast(struct carp_softc *);
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#ifdef INET6
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void carp_send_na(struct carp_softc *);
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int carp_set_addr6(struct carp_softc *, struct sockaddr_in6 *);
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int carp_join_multicast6(struct carp_softc *);
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#endif
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int carp_clone_create(struct if_clone *, int);
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int carp_clone_destroy(struct ifnet *);
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int carp_ether_addmulti(struct carp_softc *, struct ifreq *);
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int carp_ether_delmulti(struct carp_softc *, struct ifreq *);
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void carp_ether_purgemulti(struct carp_softc *);
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int carp_group_demote_count(struct carp_softc *);
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void carp_update_lsmask(struct carp_softc *);
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int carp_new_vhost(struct carp_softc *, int, int);
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void carp_destroy_vhosts(struct carp_softc *);
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void carp_del_all_timeouts(struct carp_softc *);
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int carp_vhe_match(struct carp_softc *, uint64_t);
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struct if_clone carp_cloner =
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IF_CLONE_INITIALIZER("carp", carp_clone_create, carp_clone_destroy);
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#define carp_cksum(_m, _l) ((u_int16_t)in_cksum((_m), (_l)))
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#define CARP_IFQ_PRIO 6
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void
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carp_hmac_prepare(struct carp_softc *sc)
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{
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struct carp_vhost_entry *vhe;
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u_int8_t i;
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KERNEL_ASSERT_LOCKED(); /* touching carp_vhosts */
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SRPL_FOREACH_LOCKED(vhe, &sc->carp_vhosts, vhost_entries) {
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for (i = 0; i < HMAC_MAX; i++) {
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carp_hmac_prepare_ctx(vhe, i);
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}
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}
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}
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void
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carp_hmac_prepare_ctx(struct carp_vhost_entry *vhe, u_int8_t ctx)
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{
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struct carp_softc *sc = vhe->parent_sc;
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u_int8_t version = CARP_VERSION, type = CARP_ADVERTISEMENT;
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u_int8_t vhid = vhe->vhid & 0xff;
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SHA1_CTX sha1ctx;
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u_int32_t kmd[5];
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struct ifaddr *ifa;
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int i, found;
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struct in_addr last, cur, in;
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#ifdef INET6
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struct in6_addr last6, cur6, in6;
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#endif /* INET6 */
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/* compute ipad from key */
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memset(vhe->vhe_pad, 0, sizeof(vhe->vhe_pad));
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bcopy(sc->sc_key, vhe->vhe_pad, sizeof(sc->sc_key));
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for (i = 0; i < sizeof(vhe->vhe_pad); i++)
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vhe->vhe_pad[i] ^= 0x36;
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/* precompute first part of inner hash */
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SHA1Init(&vhe->vhe_sha1[ctx]);
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SHA1Update(&vhe->vhe_sha1[ctx], vhe->vhe_pad, sizeof(vhe->vhe_pad));
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SHA1Update(&vhe->vhe_sha1[ctx], (void *)&version, sizeof(version));
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SHA1Update(&vhe->vhe_sha1[ctx], (void *)&type, sizeof(type));
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/* generate a key for the arpbalance hash, before the vhid is hashed */
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if (vhe->vhe_leader) {
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bcopy(&vhe->vhe_sha1[ctx], &sha1ctx, sizeof(sha1ctx));
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SHA1Final((unsigned char *)kmd, &sha1ctx);
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sc->sc_hashkey[0] = kmd[0] ^ kmd[1];
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sc->sc_hashkey[1] = kmd[2] ^ kmd[3];
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}
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/* the rest of the precomputation */
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if (!sc->sc_realmac && vhe->vhe_leader &&
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memcmp(sc->sc_ac.ac_enaddr, vhe->vhe_enaddr, ETHER_ADDR_LEN) != 0)
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SHA1Update(&vhe->vhe_sha1[ctx], sc->sc_ac.ac_enaddr,
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ETHER_ADDR_LEN);
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SHA1Update(&vhe->vhe_sha1[ctx], (void *)&vhid, sizeof(vhid));
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/* Hash the addresses from smallest to largest, not interface order */
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cur.s_addr = 0;
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do {
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found = 0;
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last = cur;
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cur.s_addr = 0xffffffff;
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TAILQ_FOREACH(ifa, &sc->sc_if.if_addrlist, ifa_list) {
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if (ifa->ifa_addr->sa_family != AF_INET)
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continue;
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in.s_addr = ifatoia(ifa)->ia_addr.sin_addr.s_addr;
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if (ntohl(in.s_addr) > ntohl(last.s_addr) &&
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ntohl(in.s_addr) < ntohl(cur.s_addr)) {
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cur.s_addr = in.s_addr;
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found++;
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}
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}
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if (found)
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SHA1Update(&vhe->vhe_sha1[ctx],
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(void *)&cur, sizeof(cur));
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} while (found);
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#ifdef INET6
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memset(&cur6, 0x00, sizeof(cur6));
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do {
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found = 0;
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last6 = cur6;
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memset(&cur6, 0xff, sizeof(cur6));
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TAILQ_FOREACH(ifa, &sc->sc_if.if_addrlist, ifa_list) {
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if (ifa->ifa_addr->sa_family != AF_INET6)
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continue;
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in6 = ifatoia6(ifa)->ia_addr.sin6_addr;
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if (IN6_IS_SCOPE_EMBED(&in6)) {
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if (ctx == HMAC_NOV6LL)
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continue;
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in6.s6_addr16[1] = 0;
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}
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if (memcmp(&in6, &last6, sizeof(in6)) > 0 &&
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memcmp(&in6, &cur6, sizeof(in6)) < 0) {
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cur6 = in6;
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found++;
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}
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}
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if (found)
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SHA1Update(&vhe->vhe_sha1[ctx],
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(void *)&cur6, sizeof(cur6));
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} while (found);
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#endif /* INET6 */
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/* convert ipad to opad */
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for (i = 0; i < sizeof(vhe->vhe_pad); i++)
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vhe->vhe_pad[i] ^= 0x36 ^ 0x5c;
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}
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void
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carp_hmac_generate(struct carp_vhost_entry *vhe, u_int32_t counter[2],
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unsigned char md[20], u_int8_t ctx)
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{
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SHA1_CTX sha1ctx;
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/* fetch first half of inner hash */
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bcopy(&vhe->vhe_sha1[ctx], &sha1ctx, sizeof(sha1ctx));
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SHA1Update(&sha1ctx, (void *)counter, sizeof(vhe->vhe_replay_cookie));
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SHA1Final(md, &sha1ctx);
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/* outer hash */
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SHA1Init(&sha1ctx);
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SHA1Update(&sha1ctx, vhe->vhe_pad, sizeof(vhe->vhe_pad));
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SHA1Update(&sha1ctx, md, 20);
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SHA1Final(md, &sha1ctx);
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}
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int
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carp_hmac_verify(struct carp_vhost_entry *vhe, u_int32_t counter[2],
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unsigned char md[20])
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{
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unsigned char md2[20];
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u_int8_t i;
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for (i = 0; i < HMAC_MAX; i++) {
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carp_hmac_generate(vhe, counter, md2, i);
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if (!timingsafe_bcmp(md, md2, sizeof(md2)))
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return (0);
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}
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return (1);
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}
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int
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carp_proto_input(struct mbuf **mp, int *offp, int proto, int af)
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{
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struct ifnet *ifp;
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ifp = if_get((*mp)->m_pkthdr.ph_ifidx);
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if (ifp == NULL) {
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m_freemp(mp);
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return IPPROTO_DONE;
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}
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proto = carp_proto_input_if(ifp, mp, offp, proto);
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if_put(ifp);
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return proto;
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}
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/*
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* process input packet.
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* we have rearranged checks order compared to the rfc,
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* but it seems more efficient this way or not possible otherwise.
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*/
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int
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carp_proto_input_if(struct ifnet *ifp, struct mbuf **mp, int *offp, int proto)
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{
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struct mbuf *m = *mp;
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struct ip *ip = mtod(m, struct ip *);
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struct carp_softc *sc = NULL;
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struct carp_header *ch;
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int iplen, len, ismulti;
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carpstat_inc(carps_ipackets);
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if (!carp_opts[CARPCTL_ALLOW]) {
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m_freem(m);
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return IPPROTO_DONE;
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}
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ismulti = IN_MULTICAST(ip->ip_dst.s_addr);
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/* check if received on a valid carp interface */
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switch (ifp->if_type) {
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case IFT_CARP:
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break;
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case IFT_ETHER:
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|
if (ismulti || !SRPL_EMPTY_LOCKED(&ifp->if_carp))
|
|
break;
|
|
/* FALLTHROUGH */
|
|
default:
|
|
carpstat_inc(carps_badif);
|
|
CARP_LOG(LOG_INFO, sc,
|
|
("packet received on non-carp interface: %s",
|
|
ifp->if_xname));
|
|
m_freem(m);
|
|
return IPPROTO_DONE;
|
|
}
|
|
|
|
/* verify that the IP TTL is 255. */
|
|
if (ip->ip_ttl != CARP_DFLTTL) {
|
|
carpstat_inc(carps_badttl);
|
|
CARP_LOG(LOG_NOTICE, sc, ("received ttl %d != %d on %s",
|
|
ip->ip_ttl, CARP_DFLTTL, ifp->if_xname));
|
|
m_freem(m);
|
|
return IPPROTO_DONE;
|
|
}
|
|
|
|
/*
|
|
* verify that the received packet length is
|
|
* equal to the CARP header
|
|
*/
|
|
iplen = ip->ip_hl << 2;
|
|
len = iplen + sizeof(*ch);
|
|
if (len > m->m_pkthdr.len) {
|
|
carpstat_inc(carps_badlen);
|
|
CARP_LOG(LOG_INFO, sc, ("packet too short %d on %s",
|
|
m->m_pkthdr.len, ifp->if_xname));
|
|
m_freem(m);
|
|
return IPPROTO_DONE;
|
|
}
|
|
|
|
if ((m = *mp = m_pullup(m, len)) == NULL) {
|
|
carpstat_inc(carps_hdrops);
|
|
return IPPROTO_DONE;
|
|
}
|
|
ip = mtod(m, struct ip *);
|
|
ch = (struct carp_header *)(mtod(m, caddr_t) + iplen);
|
|
|
|
/* verify the CARP checksum */
|
|
m->m_data += iplen;
|
|
if (carp_cksum(m, len - iplen)) {
|
|
carpstat_inc(carps_badsum);
|
|
CARP_LOG(LOG_INFO, sc, ("checksum failed on %s",
|
|
ifp->if_xname));
|
|
m_freem(m);
|
|
return IPPROTO_DONE;
|
|
}
|
|
m->m_data -= iplen;
|
|
|
|
KERNEL_LOCK();
|
|
carp_proto_input_c(ifp, m, ch, ismulti, AF_INET);
|
|
KERNEL_UNLOCK();
|
|
return IPPROTO_DONE;
|
|
}
|
|
|
|
#ifdef INET6
|
|
int
|
|
carp6_proto_input(struct mbuf **mp, int *offp, int proto, int af)
|
|
{
|
|
struct ifnet *ifp;
|
|
|
|
ifp = if_get((*mp)->m_pkthdr.ph_ifidx);
|
|
if (ifp == NULL) {
|
|
m_freemp(mp);
|
|
return IPPROTO_DONE;
|
|
}
|
|
|
|
proto = carp6_proto_input_if(ifp, mp, offp, proto);
|
|
if_put(ifp);
|
|
return proto;
|
|
}
|
|
|
|
int
|
|
carp6_proto_input_if(struct ifnet *ifp, struct mbuf **mp, int *offp, int proto)
|
|
{
|
|
struct mbuf *m = *mp;
|
|
struct carp_softc *sc = NULL;
|
|
struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
|
|
struct carp_header *ch;
|
|
u_int len;
|
|
|
|
carpstat_inc(carps_ipackets6);
|
|
|
|
if (!carp_opts[CARPCTL_ALLOW]) {
|
|
m_freem(m);
|
|
return IPPROTO_DONE;
|
|
}
|
|
|
|
/* check if received on a valid carp interface */
|
|
if (ifp->if_type != IFT_CARP) {
|
|
carpstat_inc(carps_badif);
|
|
CARP_LOG(LOG_INFO, sc, ("packet received on non-carp interface: %s",
|
|
ifp->if_xname));
|
|
m_freem(m);
|
|
return IPPROTO_DONE;
|
|
}
|
|
|
|
/* verify that the IP TTL is 255 */
|
|
if (ip6->ip6_hlim != CARP_DFLTTL) {
|
|
carpstat_inc(carps_badttl);
|
|
CARP_LOG(LOG_NOTICE, sc, ("received ttl %d != %d on %s",
|
|
ip6->ip6_hlim, CARP_DFLTTL, ifp->if_xname));
|
|
m_freem(m);
|
|
return IPPROTO_DONE;
|
|
}
|
|
|
|
/* verify that we have a complete carp packet */
|
|
len = m->m_len;
|
|
if ((m = *mp = m_pullup(m, *offp + sizeof(*ch))) == NULL) {
|
|
carpstat_inc(carps_badlen);
|
|
CARP_LOG(LOG_INFO, sc, ("packet size %u too small", len));
|
|
return IPPROTO_DONE;
|
|
}
|
|
ch = (struct carp_header *)(mtod(m, caddr_t) + *offp);
|
|
|
|
/* verify the CARP checksum */
|
|
m->m_data += *offp;
|
|
if (carp_cksum(m, sizeof(*ch))) {
|
|
carpstat_inc(carps_badsum);
|
|
CARP_LOG(LOG_INFO, sc, ("checksum failed, on %s",
|
|
ifp->if_xname));
|
|
m_freem(m);
|
|
return IPPROTO_DONE;
|
|
}
|
|
m->m_data -= *offp;
|
|
|
|
KERNEL_LOCK();
|
|
carp_proto_input_c(ifp, m, ch, 1, AF_INET6);
|
|
KERNEL_UNLOCK();
|
|
return IPPROTO_DONE;
|
|
}
|
|
#endif /* INET6 */
|
|
|
|
void
|
|
carp_proto_input_c(struct ifnet *ifp, struct mbuf *m, struct carp_header *ch,
|
|
int ismulti, sa_family_t af)
|
|
{
|
|
struct carp_softc *sc;
|
|
struct ifnet *ifp0;
|
|
struct carp_vhost_entry *vhe;
|
|
struct timeval sc_tv, ch_tv;
|
|
struct srpl *cif;
|
|
|
|
KERNEL_ASSERT_LOCKED(); /* touching if_carp + carp_vhosts */
|
|
|
|
ifp0 = if_get(ifp->if_carpdevidx);
|
|
|
|
if (ifp->if_type == IFT_CARP) {
|
|
/*
|
|
* If the parent of this carp(4) got destroyed while
|
|
* `m' was being processed, silently drop it.
|
|
*/
|
|
if (ifp0 == NULL)
|
|
goto rele;
|
|
cif = &ifp0->if_carp;
|
|
} else
|
|
cif = &ifp->if_carp;
|
|
|
|
SRPL_FOREACH_LOCKED(sc, cif, sc_list) {
|
|
if (af == AF_INET &&
|
|
ismulti != IN_MULTICAST(sc->sc_peer.s_addr))
|
|
continue;
|
|
SRPL_FOREACH_LOCKED(vhe, &sc->carp_vhosts, vhost_entries) {
|
|
if (vhe->vhid == ch->carp_vhid)
|
|
goto found;
|
|
}
|
|
}
|
|
found:
|
|
|
|
if (!sc || (sc->sc_if.if_flags & (IFF_UP|IFF_RUNNING)) !=
|
|
(IFF_UP|IFF_RUNNING)) {
|
|
carpstat_inc(carps_badvhid);
|
|
goto rele;
|
|
}
|
|
|
|
getmicrotime(&sc->sc_if.if_lastchange);
|
|
|
|
/* verify the CARP version. */
|
|
if (ch->carp_version != CARP_VERSION) {
|
|
carpstat_inc(carps_badver);
|
|
sc->sc_if.if_ierrors++;
|
|
CARP_LOG(LOG_NOTICE, sc, ("invalid version %d != %d",
|
|
ch->carp_version, CARP_VERSION));
|
|
goto rele;
|
|
}
|
|
|
|
/* verify the hash */
|
|
if (carp_hmac_verify(vhe, ch->carp_counter, ch->carp_md)) {
|
|
carpstat_inc(carps_badauth);
|
|
sc->sc_if.if_ierrors++;
|
|
CARP_LOG(LOG_INFO, sc, ("incorrect hash"));
|
|
goto rele;
|
|
}
|
|
|
|
if (!memcmp(&vhe->vhe_replay_cookie, ch->carp_counter,
|
|
sizeof(ch->carp_counter))) {
|
|
struct ifnet *ifp2;
|
|
|
|
ifp2 = if_get(sc->sc_carpdevidx);
|
|
/* Do not log duplicates from non simplex interfaces */
|
|
if (ifp2 && ifp2->if_flags & IFF_SIMPLEX) {
|
|
carpstat_inc(carps_badauth);
|
|
sc->sc_if.if_ierrors++;
|
|
CARP_LOG(LOG_WARNING, sc,
|
|
("replay or network loop detected"));
|
|
}
|
|
if_put(ifp2);
|
|
goto rele;
|
|
}
|
|
|
|
sc_tv.tv_sec = sc->sc_advbase;
|
|
sc_tv.tv_usec = vhe->advskew * 1000000 / 256;
|
|
ch_tv.tv_sec = ch->carp_advbase;
|
|
ch_tv.tv_usec = ch->carp_advskew * 1000000 / 256;
|
|
|
|
switch (vhe->state) {
|
|
case INIT:
|
|
break;
|
|
case MASTER:
|
|
/*
|
|
* If we receive an advertisement from a master who's going to
|
|
* be more frequent than us, and whose demote count is not higher
|
|
* than ours, go into BACKUP state. If his demote count is lower,
|
|
* also go into BACKUP.
|
|
*/
|
|
if (((timercmp(&sc_tv, &ch_tv, >) ||
|
|
timercmp(&sc_tv, &ch_tv, ==)) &&
|
|
(ch->carp_demote <= carp_group_demote_count(sc))) ||
|
|
ch->carp_demote < carp_group_demote_count(sc)) {
|
|
timeout_del(&vhe->ad_tmo);
|
|
carp_set_state(vhe, BACKUP);
|
|
carp_setrun(vhe, 0);
|
|
}
|
|
break;
|
|
case BACKUP:
|
|
/*
|
|
* If we're pre-empting masters who advertise slower than us,
|
|
* and do not have a better demote count, treat them as down.
|
|
*
|
|
*/
|
|
if (carp_opts[CARPCTL_PREEMPT] &&
|
|
timercmp(&sc_tv, &ch_tv, <) &&
|
|
ch->carp_demote >= carp_group_demote_count(sc)) {
|
|
carp_master_down(vhe);
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Take over masters advertising with a higher demote count,
|
|
* regardless of CARPCTL_PREEMPT.
|
|
*/
|
|
if (ch->carp_demote > carp_group_demote_count(sc)) {
|
|
carp_master_down(vhe);
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* If the master is going to advertise at such a low frequency
|
|
* that he's guaranteed to time out, we'd might as well just
|
|
* treat him as timed out now.
|
|
*/
|
|
sc_tv.tv_sec = sc->sc_advbase * 3;
|
|
if (sc->sc_advbase && timercmp(&sc_tv, &ch_tv, <)) {
|
|
carp_master_down(vhe);
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Otherwise, we reset the counter and wait for the next
|
|
* advertisement.
|
|
*/
|
|
carp_setrun(vhe, af);
|
|
break;
|
|
}
|
|
|
|
rele:
|
|
if_put(ifp0);
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
|
|
int
|
|
carp_sysctl_carpstat(void *oldp, size_t *oldlenp, void *newp)
|
|
{
|
|
struct carpstats carpstat;
|
|
|
|
CTASSERT(sizeof(carpstat) == (carps_ncounters * sizeof(uint64_t)));
|
|
memset(&carpstat, 0, sizeof carpstat);
|
|
counters_read(carpcounters, (uint64_t *)&carpstat, carps_ncounters,
|
|
NULL);
|
|
return (sysctl_rdstruct(oldp, oldlenp, newp,
|
|
&carpstat, sizeof(carpstat)));
|
|
}
|
|
|
|
int
|
|
carp_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, void *newp,
|
|
size_t newlen)
|
|
{
|
|
int error;
|
|
|
|
/* All sysctl names at this level are terminal. */
|
|
if (namelen != 1)
|
|
return (ENOTDIR);
|
|
|
|
switch (name[0]) {
|
|
case CARPCTL_STATS:
|
|
return (carp_sysctl_carpstat(oldp, oldlenp, newp));
|
|
default:
|
|
if (name[0] <= 0 || name[0] >= CARPCTL_MAXID)
|
|
return (ENOPROTOOPT);
|
|
NET_LOCK();
|
|
error = sysctl_int(oldp, oldlenp, newp, newlen,
|
|
&carp_opts[name[0]]);
|
|
NET_UNLOCK();
|
|
return (error);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Interface side of the CARP implementation.
|
|
*/
|
|
|
|
void
|
|
carpattach(int n)
|
|
{
|
|
if_creategroup("carp"); /* keep around even if empty */
|
|
if_clone_attach(&carp_cloner);
|
|
carpcounters = counters_alloc(carps_ncounters);
|
|
}
|
|
|
|
int
|
|
carp_clone_create(struct if_clone *ifc, int unit)
|
|
{
|
|
struct carp_softc *sc;
|
|
struct ifnet *ifp;
|
|
|
|
sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO);
|
|
refcnt_init(&sc->sc_refcnt);
|
|
|
|
SRPL_INIT(&sc->carp_vhosts);
|
|
sc->sc_vhe_count = 0;
|
|
if (carp_new_vhost(sc, 0, 0)) {
|
|
free(sc, M_DEVBUF, sizeof(*sc));
|
|
return (ENOMEM);
|
|
}
|
|
|
|
task_set(&sc->sc_atask, carp_addr_updated, sc);
|
|
task_set(&sc->sc_ltask, carp_carpdev_state, sc);
|
|
task_set(&sc->sc_dtask, carpdetach, sc);
|
|
|
|
sc->sc_suppress = 0;
|
|
sc->sc_advbase = CARP_DFLTINTV;
|
|
sc->sc_naddrs = sc->sc_naddrs6 = 0;
|
|
#ifdef INET6
|
|
sc->sc_im6o.im6o_hlim = CARP_DFLTTL;
|
|
#endif /* INET6 */
|
|
sc->sc_imo.imo_membership = mallocarray(IP_MIN_MEMBERSHIPS,
|
|
sizeof(struct in_multi *), M_IPMOPTS, M_WAITOK|M_ZERO);
|
|
sc->sc_imo.imo_max_memberships = IP_MIN_MEMBERSHIPS;
|
|
|
|
LIST_INIT(&sc->carp_mc_listhead);
|
|
ifp = &sc->sc_if;
|
|
ifp->if_softc = sc;
|
|
snprintf(ifp->if_xname, sizeof ifp->if_xname, "%s%d", ifc->ifc_name,
|
|
unit);
|
|
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
|
|
ifp->if_ioctl = carp_ioctl;
|
|
ifp->if_start = carp_start;
|
|
ifp->if_enqueue = carp_enqueue;
|
|
ifp->if_xflags = IFXF_CLONED;
|
|
if_counters_alloc(ifp);
|
|
if_attach(ifp);
|
|
ether_ifattach(ifp);
|
|
ifp->if_type = IFT_CARP;
|
|
ifp->if_sadl->sdl_type = IFT_CARP;
|
|
ifp->if_output = carp_output;
|
|
ifp->if_priority = IF_CARP_DEFAULT_PRIORITY;
|
|
ifp->if_link_state = LINK_STATE_INVALID;
|
|
|
|
/* Hook carp_addr_updated to cope with address and route changes. */
|
|
if_addrhook_add(&sc->sc_if, &sc->sc_atask);
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
carp_new_vhost(struct carp_softc *sc, int vhid, int advskew)
|
|
{
|
|
struct carp_vhost_entry *vhe, *vhe0;
|
|
|
|
vhe = malloc(sizeof(*vhe), M_DEVBUF, M_NOWAIT | M_ZERO);
|
|
if (vhe == NULL)
|
|
return (ENOMEM);
|
|
|
|
refcnt_init(&vhe->vhost_refcnt);
|
|
carp_sc_ref(NULL, sc); /* give a sc ref to the vhe */
|
|
vhe->parent_sc = sc;
|
|
vhe->vhid = vhid;
|
|
vhe->advskew = advskew;
|
|
vhe->state = INIT;
|
|
timeout_set_proc(&vhe->ad_tmo, carp_timer_ad, vhe);
|
|
timeout_set_proc(&vhe->md_tmo, carp_timer_down, vhe);
|
|
timeout_set_proc(&vhe->md6_tmo, carp_timer_down, vhe);
|
|
|
|
KERNEL_ASSERT_LOCKED(); /* touching carp_vhosts */
|
|
|
|
/* mark the first vhe as leader */
|
|
if (SRPL_EMPTY_LOCKED(&sc->carp_vhosts)) {
|
|
vhe->vhe_leader = 1;
|
|
SRPL_INSERT_HEAD_LOCKED(&carp_vh_rc, &sc->carp_vhosts,
|
|
vhe, vhost_entries);
|
|
sc->sc_vhe_count = 1;
|
|
return (0);
|
|
}
|
|
|
|
SRPL_FOREACH_LOCKED(vhe0, &sc->carp_vhosts, vhost_entries) {
|
|
if (SRPL_NEXT_LOCKED(vhe0, vhost_entries) == NULL)
|
|
break;
|
|
}
|
|
|
|
SRPL_INSERT_AFTER_LOCKED(&carp_vh_rc, vhe0, vhe, vhost_entries);
|
|
sc->sc_vhe_count++;
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
carp_clone_destroy(struct ifnet *ifp)
|
|
{
|
|
struct carp_softc *sc = ifp->if_softc;
|
|
|
|
if_addrhook_del(&sc->sc_if, &sc->sc_atask);
|
|
|
|
NET_LOCK();
|
|
carpdetach(sc);
|
|
NET_UNLOCK();
|
|
|
|
ether_ifdetach(ifp);
|
|
if_detach(ifp);
|
|
carp_destroy_vhosts(ifp->if_softc);
|
|
refcnt_finalize(&sc->sc_refcnt, "carpdtor");
|
|
free(sc->sc_imo.imo_membership, M_IPMOPTS,
|
|
sc->sc_imo.imo_max_memberships * sizeof(struct in_multi *));
|
|
free(sc, M_DEVBUF, sizeof(*sc));
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
carp_del_all_timeouts(struct carp_softc *sc)
|
|
{
|
|
struct carp_vhost_entry *vhe;
|
|
|
|
KERNEL_ASSERT_LOCKED(); /* touching carp_vhosts */
|
|
SRPL_FOREACH_LOCKED(vhe, &sc->carp_vhosts, vhost_entries) {
|
|
timeout_del(&vhe->ad_tmo);
|
|
timeout_del(&vhe->md_tmo);
|
|
timeout_del(&vhe->md6_tmo);
|
|
}
|
|
}
|
|
|
|
void
|
|
carpdetach(void *arg)
|
|
{
|
|
struct carp_softc *sc = arg;
|
|
struct ifnet *ifp0;
|
|
struct srpl *cif;
|
|
|
|
carp_del_all_timeouts(sc);
|
|
|
|
if (sc->sc_demote_cnt)
|
|
carp_group_demote_adj(&sc->sc_if, -sc->sc_demote_cnt, "detach");
|
|
sc->sc_suppress = 0;
|
|
sc->sc_sendad_errors = 0;
|
|
|
|
carp_set_state_all(sc, INIT);
|
|
sc->sc_if.if_flags &= ~IFF_UP;
|
|
carp_setrun_all(sc, 0);
|
|
carp_multicast_cleanup(sc);
|
|
|
|
ifp0 = if_get(sc->sc_carpdevidx);
|
|
if (ifp0 == NULL)
|
|
return;
|
|
|
|
KERNEL_ASSERT_LOCKED(); /* touching if_carp */
|
|
|
|
cif = &ifp0->if_carp;
|
|
|
|
SRPL_REMOVE_LOCKED(&carp_sc_rc, cif, sc, carp_softc, sc_list);
|
|
sc->sc_carpdevidx = 0;
|
|
|
|
if_linkstatehook_del(ifp0, &sc->sc_ltask);
|
|
if_detachhook_del(ifp0, &sc->sc_dtask);
|
|
ifpromisc(ifp0, 0);
|
|
if_put(ifp0);
|
|
}
|
|
|
|
void
|
|
carp_destroy_vhosts(struct carp_softc *sc)
|
|
{
|
|
/* XXX bow out? */
|
|
struct carp_vhost_entry *vhe;
|
|
|
|
KERNEL_ASSERT_LOCKED(); /* touching carp_vhosts */
|
|
|
|
while ((vhe = SRPL_FIRST_LOCKED(&sc->carp_vhosts)) != NULL) {
|
|
SRPL_REMOVE_LOCKED(&carp_vh_rc, &sc->carp_vhosts, vhe,
|
|
carp_vhost_entry, vhost_entries);
|
|
carp_vh_unref(NULL, vhe); /* drop last ref */
|
|
}
|
|
sc->sc_vhe_count = 0;
|
|
}
|
|
|
|
void
|
|
carp_prepare_ad(struct mbuf *m, struct carp_vhost_entry *vhe,
|
|
struct carp_header *ch)
|
|
{
|
|
if (!vhe->vhe_replay_cookie) {
|
|
arc4random_buf(&vhe->vhe_replay_cookie,
|
|
sizeof(vhe->vhe_replay_cookie));
|
|
}
|
|
|
|
bcopy(&vhe->vhe_replay_cookie, ch->carp_counter,
|
|
sizeof(ch->carp_counter));
|
|
|
|
/*
|
|
* For the time being, do not include the IPv6 linklayer addresses
|
|
* in the HMAC.
|
|
*/
|
|
carp_hmac_generate(vhe, ch->carp_counter, ch->carp_md, HMAC_NOV6LL);
|
|
}
|
|
|
|
void
|
|
carp_send_ad_all(void)
|
|
{
|
|
struct ifnet *ifp0;
|
|
struct srpl *cif;
|
|
struct carp_softc *vh;
|
|
|
|
KERNEL_ASSERT_LOCKED(); /* touching if_carp */
|
|
|
|
if (carp_send_all_recur > 0)
|
|
return;
|
|
++carp_send_all_recur;
|
|
TAILQ_FOREACH(ifp0, &ifnetlist, if_list) {
|
|
if (ifp0->if_type != IFT_ETHER)
|
|
continue;
|
|
|
|
cif = &ifp0->if_carp;
|
|
SRPL_FOREACH_LOCKED(vh, cif, sc_list) {
|
|
if ((vh->sc_if.if_flags & (IFF_UP|IFF_RUNNING)) ==
|
|
(IFF_UP|IFF_RUNNING)) {
|
|
carp_vhe_send_ad_all(vh);
|
|
}
|
|
}
|
|
}
|
|
--carp_send_all_recur;
|
|
}
|
|
|
|
void
|
|
carp_vhe_send_ad_all(struct carp_softc *sc)
|
|
{
|
|
struct carp_vhost_entry *vhe;
|
|
|
|
KERNEL_ASSERT_LOCKED(); /* touching carp_vhosts */
|
|
|
|
SRPL_FOREACH_LOCKED(vhe, &sc->carp_vhosts, vhost_entries) {
|
|
if (vhe->state == MASTER)
|
|
carp_send_ad(vhe);
|
|
}
|
|
}
|
|
|
|
void
|
|
carp_timer_ad(void *v)
|
|
{
|
|
NET_LOCK();
|
|
carp_send_ad(v);
|
|
NET_UNLOCK();
|
|
}
|
|
|
|
void
|
|
carp_send_ad(struct carp_vhost_entry *vhe)
|
|
{
|
|
struct carp_header ch;
|
|
struct timeval tv;
|
|
struct carp_softc *sc = vhe->parent_sc;
|
|
struct carp_header *ch_ptr;
|
|
struct mbuf *m;
|
|
int error, len, advbase, advskew;
|
|
struct ifnet *ifp;
|
|
struct ifaddr *ifa;
|
|
struct sockaddr sa;
|
|
|
|
NET_ASSERT_LOCKED();
|
|
|
|
if ((ifp = if_get(sc->sc_carpdevidx)) == NULL) {
|
|
sc->sc_if.if_oerrors++;
|
|
return;
|
|
}
|
|
|
|
/* bow out if we've gone to backup (the carp interface is going down) */
|
|
if (sc->sc_bow_out) {
|
|
advbase = 255;
|
|
advskew = 255;
|
|
} else {
|
|
advbase = sc->sc_advbase;
|
|
advskew = vhe->advskew;
|
|
tv.tv_sec = advbase;
|
|
if (advbase == 0 && advskew == 0)
|
|
tv.tv_usec = 1 * 1000000 / 256;
|
|
else
|
|
tv.tv_usec = advskew * 1000000 / 256;
|
|
}
|
|
|
|
ch.carp_version = CARP_VERSION;
|
|
ch.carp_type = CARP_ADVERTISEMENT;
|
|
ch.carp_vhid = vhe->vhid;
|
|
ch.carp_demote = carp_group_demote_count(sc) & 0xff;
|
|
ch.carp_advbase = advbase;
|
|
ch.carp_advskew = advskew;
|
|
ch.carp_authlen = 7; /* XXX DEFINE */
|
|
ch.carp_cksum = 0;
|
|
|
|
sc->cur_vhe = vhe; /* we need the vhe later on the output path */
|
|
|
|
if (sc->sc_naddrs) {
|
|
struct ip *ip;
|
|
|
|
MGETHDR(m, M_DONTWAIT, MT_HEADER);
|
|
if (m == NULL) {
|
|
sc->sc_if.if_oerrors++;
|
|
carpstat_inc(carps_onomem);
|
|
/* XXX maybe less ? */
|
|
goto retry_later;
|
|
}
|
|
len = sizeof(*ip) + sizeof(ch);
|
|
m->m_pkthdr.pf.prio = CARP_IFQ_PRIO;
|
|
m->m_pkthdr.ph_rtableid = sc->sc_if.if_rdomain;
|
|
m->m_pkthdr.len = len;
|
|
m->m_len = len;
|
|
m_align(m, len);
|
|
ip = mtod(m, struct ip *);
|
|
ip->ip_v = IPVERSION;
|
|
ip->ip_hl = sizeof(*ip) >> 2;
|
|
ip->ip_tos = IPTOS_LOWDELAY;
|
|
ip->ip_len = htons(len);
|
|
ip->ip_id = htons(ip_randomid());
|
|
ip->ip_off = htons(IP_DF);
|
|
ip->ip_ttl = CARP_DFLTTL;
|
|
ip->ip_p = IPPROTO_CARP;
|
|
ip->ip_sum = 0;
|
|
|
|
memset(&sa, 0, sizeof(sa));
|
|
sa.sa_family = AF_INET;
|
|
/* Prefer addresses on the parent interface as source for AD. */
|
|
ifa = ifaof_ifpforaddr(&sa, ifp);
|
|
if (ifa == NULL)
|
|
ifa = ifaof_ifpforaddr(&sa, &sc->sc_if);
|
|
KASSERT(ifa != NULL);
|
|
ip->ip_src.s_addr = ifatoia(ifa)->ia_addr.sin_addr.s_addr;
|
|
ip->ip_dst.s_addr = sc->sc_peer.s_addr;
|
|
if (IN_MULTICAST(ip->ip_dst.s_addr))
|
|
m->m_flags |= M_MCAST;
|
|
|
|
ch_ptr = (struct carp_header *)(ip + 1);
|
|
bcopy(&ch, ch_ptr, sizeof(ch));
|
|
carp_prepare_ad(m, vhe, ch_ptr);
|
|
|
|
m->m_data += sizeof(*ip);
|
|
ch_ptr->carp_cksum = carp_cksum(m, len - sizeof(*ip));
|
|
m->m_data -= sizeof(*ip);
|
|
|
|
getmicrotime(&sc->sc_if.if_lastchange);
|
|
carpstat_inc(carps_opackets);
|
|
|
|
error = ip_output(m, NULL, NULL, IP_RAWOUTPUT, &sc->sc_imo,
|
|
NULL, 0);
|
|
if (error &&
|
|
/* when unicast, the peer's down is not our fault */
|
|
!(!IN_MULTICAST(sc->sc_peer.s_addr) && error == EHOSTDOWN)){
|
|
if (error == ENOBUFS)
|
|
carpstat_inc(carps_onomem);
|
|
else
|
|
CARP_LOG(LOG_WARNING, sc,
|
|
("ip_output failed: %d", error));
|
|
sc->sc_if.if_oerrors++;
|
|
if (sc->sc_sendad_errors < INT_MAX)
|
|
sc->sc_sendad_errors++;
|
|
if (sc->sc_sendad_errors == CARP_SENDAD_MAX_ERRORS(sc))
|
|
carp_group_demote_adj(&sc->sc_if, 1,
|
|
"> snderrors");
|
|
sc->sc_sendad_success = 0;
|
|
} else {
|
|
if (sc->sc_sendad_errors >= CARP_SENDAD_MAX_ERRORS(sc)) {
|
|
if (++sc->sc_sendad_success >=
|
|
CARP_SENDAD_MIN_SUCCESS(sc)) {
|
|
carp_group_demote_adj(&sc->sc_if, -1,
|
|
"< snderrors");
|
|
sc->sc_sendad_errors = 0;
|
|
}
|
|
} else
|
|
sc->sc_sendad_errors = 0;
|
|
}
|
|
if (vhe->vhe_leader) {
|
|
if (sc->sc_delayed_arp > 0)
|
|
sc->sc_delayed_arp--;
|
|
if (sc->sc_delayed_arp == 0) {
|
|
carp_send_arp(sc);
|
|
sc->sc_delayed_arp = -1;
|
|
}
|
|
}
|
|
}
|
|
#ifdef INET6
|
|
if (sc->sc_naddrs6) {
|
|
struct ip6_hdr *ip6;
|
|
|
|
MGETHDR(m, M_DONTWAIT, MT_HEADER);
|
|
if (m == NULL) {
|
|
sc->sc_if.if_oerrors++;
|
|
carpstat_inc(carps_onomem);
|
|
/* XXX maybe less ? */
|
|
goto retry_later;
|
|
}
|
|
len = sizeof(*ip6) + sizeof(ch);
|
|
m->m_pkthdr.pf.prio = CARP_IFQ_PRIO;
|
|
m->m_pkthdr.ph_rtableid = sc->sc_if.if_rdomain;
|
|
m->m_pkthdr.len = len;
|
|
m->m_len = len;
|
|
m_align(m, len);
|
|
m->m_flags |= M_MCAST;
|
|
ip6 = mtod(m, struct ip6_hdr *);
|
|
memset(ip6, 0, sizeof(*ip6));
|
|
ip6->ip6_vfc |= IPV6_VERSION;
|
|
ip6->ip6_hlim = CARP_DFLTTL;
|
|
ip6->ip6_nxt = IPPROTO_CARP;
|
|
|
|
/* set the source address */
|
|
memset(&sa, 0, sizeof(sa));
|
|
sa.sa_family = AF_INET6;
|
|
/* Prefer addresses on the parent interface as source for AD. */
|
|
ifa = ifaof_ifpforaddr(&sa, ifp);
|
|
if (ifa == NULL)
|
|
ifa = ifaof_ifpforaddr(&sa, &sc->sc_if);
|
|
KASSERT(ifa != NULL);
|
|
bcopy(ifatoia6(ifa)->ia_addr.sin6_addr.s6_addr,
|
|
&ip6->ip6_src, sizeof(struct in6_addr));
|
|
/* set the multicast destination */
|
|
|
|
ip6->ip6_dst.s6_addr16[0] = htons(0xff02);
|
|
ip6->ip6_dst.s6_addr16[1] = htons(ifp->if_index);
|
|
ip6->ip6_dst.s6_addr8[15] = 0x12;
|
|
|
|
ch_ptr = (struct carp_header *)(ip6 + 1);
|
|
bcopy(&ch, ch_ptr, sizeof(ch));
|
|
carp_prepare_ad(m, vhe, ch_ptr);
|
|
|
|
m->m_data += sizeof(*ip6);
|
|
ch_ptr->carp_cksum = carp_cksum(m, len - sizeof(*ip6));
|
|
m->m_data -= sizeof(*ip6);
|
|
|
|
getmicrotime(&sc->sc_if.if_lastchange);
|
|
carpstat_inc(carps_opackets6);
|
|
|
|
error = ip6_output(m, NULL, NULL, 0, &sc->sc_im6o, NULL);
|
|
if (error) {
|
|
if (error == ENOBUFS)
|
|
carpstat_inc(carps_onomem);
|
|
else
|
|
CARP_LOG(LOG_WARNING, sc,
|
|
("ip6_output failed: %d", error));
|
|
sc->sc_if.if_oerrors++;
|
|
if (sc->sc_sendad_errors < INT_MAX)
|
|
sc->sc_sendad_errors++;
|
|
if (sc->sc_sendad_errors == CARP_SENDAD_MAX_ERRORS(sc))
|
|
carp_group_demote_adj(&sc->sc_if, 1,
|
|
"> snd6errors");
|
|
sc->sc_sendad_success = 0;
|
|
} else {
|
|
if (sc->sc_sendad_errors >= CARP_SENDAD_MAX_ERRORS(sc)) {
|
|
if (++sc->sc_sendad_success >=
|
|
CARP_SENDAD_MIN_SUCCESS(sc)) {
|
|
carp_group_demote_adj(&sc->sc_if, -1,
|
|
"< snd6errors");
|
|
sc->sc_sendad_errors = 0;
|
|
}
|
|
} else
|
|
sc->sc_sendad_errors = 0;
|
|
}
|
|
}
|
|
#endif /* INET6 */
|
|
|
|
retry_later:
|
|
sc->cur_vhe = NULL;
|
|
if (advbase != 255 || advskew != 255)
|
|
timeout_add_tv(&vhe->ad_tmo, &tv);
|
|
if_put(ifp);
|
|
}
|
|
|
|
/*
|
|
* Broadcast a gratuitous ARP request containing
|
|
* the virtual router MAC address for each IP address
|
|
* associated with the virtual router.
|
|
*/
|
|
void
|
|
carp_send_arp(struct carp_softc *sc)
|
|
{
|
|
struct ifaddr *ifa;
|
|
in_addr_t in;
|
|
|
|
TAILQ_FOREACH(ifa, &sc->sc_if.if_addrlist, ifa_list) {
|
|
|
|
if (ifa->ifa_addr->sa_family != AF_INET)
|
|
continue;
|
|
|
|
in = ifatoia(ifa)->ia_addr.sin_addr.s_addr;
|
|
arprequest(&sc->sc_if, &in, &in, sc->sc_ac.ac_enaddr);
|
|
}
|
|
}
|
|
|
|
#ifdef INET6
|
|
void
|
|
carp_send_na(struct carp_softc *sc)
|
|
{
|
|
struct ifaddr *ifa;
|
|
struct in6_addr *in6;
|
|
static struct in6_addr mcast = IN6ADDR_LINKLOCAL_ALLNODES_INIT;
|
|
|
|
TAILQ_FOREACH(ifa, &sc->sc_if.if_addrlist, ifa_list) {
|
|
|
|
if (ifa->ifa_addr->sa_family != AF_INET6)
|
|
continue;
|
|
|
|
in6 = &ifatoia6(ifa)->ia_addr.sin6_addr;
|
|
nd6_na_output(&sc->sc_if, &mcast, in6,
|
|
ND_NA_FLAG_OVERRIDE |
|
|
(ip6_forwarding ? ND_NA_FLAG_ROUTER : 0), 1, NULL);
|
|
}
|
|
}
|
|
#endif /* INET6 */
|
|
|
|
void
|
|
carp_update_lsmask(struct carp_softc *sc)
|
|
{
|
|
struct carp_vhost_entry *vhe;
|
|
int count;
|
|
|
|
if (sc->sc_balancing == CARP_BAL_NONE)
|
|
return;
|
|
|
|
sc->sc_lsmask = 0;
|
|
count = 0;
|
|
|
|
KERNEL_ASSERT_LOCKED(); /* touching carp_vhosts */
|
|
SRPL_FOREACH_LOCKED(vhe, &sc->carp_vhosts, vhost_entries) {
|
|
if (vhe->state == MASTER && count < sizeof(sc->sc_lsmask) * 8)
|
|
sc->sc_lsmask |= 1 << count;
|
|
count++;
|
|
}
|
|
sc->sc_lscount = count;
|
|
CARP_LOG(LOG_DEBUG, sc, ("carp_update_lsmask: %x", sc->sc_lsmask));
|
|
}
|
|
|
|
int
|
|
carp_iamatch(struct ifnet *ifp)
|
|
{
|
|
struct carp_softc *sc = ifp->if_softc;
|
|
struct carp_vhost_entry *vhe;
|
|
struct srp_ref sr;
|
|
int match = 0;
|
|
|
|
vhe = SRPL_FIRST(&sr, &sc->carp_vhosts);
|
|
if (vhe->state == MASTER)
|
|
match = 1;
|
|
SRPL_LEAVE(&sr);
|
|
|
|
return (match);
|
|
}
|
|
|
|
int
|
|
carp_ourether(struct ifnet *ifp, uint8_t *ena)
|
|
{
|
|
struct srpl *cif = &ifp->if_carp;
|
|
struct carp_softc *sc;
|
|
struct srp_ref sr;
|
|
int match = 0;
|
|
uint64_t dst = ether_addr_to_e64((struct ether_addr *)ena);
|
|
|
|
KASSERT(ifp->if_type == IFT_ETHER);
|
|
|
|
SRPL_FOREACH(sc, &sr, cif, sc_list) {
|
|
if ((sc->sc_if.if_flags & (IFF_UP|IFF_RUNNING)) !=
|
|
(IFF_UP|IFF_RUNNING))
|
|
continue;
|
|
if (carp_vhe_match(sc, dst)) {
|
|
match = 1;
|
|
break;
|
|
}
|
|
}
|
|
SRPL_LEAVE(&sr);
|
|
|
|
return (match);
|
|
}
|
|
|
|
int
|
|
carp_vhe_match(struct carp_softc *sc, uint64_t dst)
|
|
{
|
|
struct carp_vhost_entry *vhe;
|
|
struct srp_ref sr;
|
|
int active = 0;
|
|
|
|
vhe = SRPL_FIRST(&sr, &sc->carp_vhosts);
|
|
active = (vhe->state == MASTER || sc->sc_balancing >= CARP_BAL_IP);
|
|
SRPL_LEAVE(&sr);
|
|
|
|
return (active && (dst ==
|
|
ether_addr_to_e64((struct ether_addr *)sc->sc_ac.ac_enaddr)));
|
|
}
|
|
|
|
struct mbuf *
|
|
carp_input(struct ifnet *ifp0, struct mbuf *m, uint64_t dst)
|
|
{
|
|
struct srpl *cif;
|
|
struct carp_softc *sc;
|
|
struct srp_ref sr;
|
|
|
|
cif = &ifp0->if_carp;
|
|
|
|
SRPL_FOREACH(sc, &sr, cif, sc_list) {
|
|
if ((sc->sc_if.if_flags & (IFF_UP|IFF_RUNNING)) !=
|
|
(IFF_UP|IFF_RUNNING))
|
|
continue;
|
|
|
|
if (carp_vhe_match(sc, dst)) {
|
|
/*
|
|
* These packets look like layer 2 multicast but they
|
|
* are unicast at layer 3. With help of the tag the
|
|
* mbuf's M_MCAST flag can be removed by carp_lsdrop()
|
|
* after we have passed layer 2.
|
|
*/
|
|
if (sc->sc_balancing == CARP_BAL_IP) {
|
|
struct m_tag *mtag;
|
|
mtag = m_tag_get(PACKET_TAG_CARP_BAL_IP, 0,
|
|
M_NOWAIT);
|
|
if (mtag == NULL) {
|
|
m_freem(m);
|
|
goto out;
|
|
}
|
|
m_tag_prepend(m, mtag);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (sc == NULL) {
|
|
SRPL_LEAVE(&sr);
|
|
|
|
if (!ETH64_IS_MULTICAST(dst))
|
|
return (m);
|
|
|
|
/*
|
|
* XXX Should really check the list of multicast addresses
|
|
* for each CARP interface _before_ copying.
|
|
*/
|
|
SRPL_FOREACH(sc, &sr, cif, sc_list) {
|
|
struct mbuf *m0;
|
|
|
|
if (!(sc->sc_if.if_flags & IFF_UP))
|
|
continue;
|
|
|
|
m0 = m_dup_pkt(m, ETHER_ALIGN, M_DONTWAIT);
|
|
if (m0 == NULL)
|
|
continue;
|
|
|
|
if_vinput(&sc->sc_if, m0);
|
|
}
|
|
SRPL_LEAVE(&sr);
|
|
|
|
return (m);
|
|
}
|
|
|
|
if_vinput(&sc->sc_if, m);
|
|
out:
|
|
SRPL_LEAVE(&sr);
|
|
|
|
return (NULL);
|
|
}
|
|
|
|
int
|
|
carp_lsdrop(struct ifnet *ifp, struct mbuf *m, sa_family_t af, u_int32_t *src,
|
|
u_int32_t *dst, int drop)
|
|
{
|
|
struct carp_softc *sc;
|
|
u_int32_t fold;
|
|
struct m_tag *mtag;
|
|
|
|
if (ifp->if_type != IFT_CARP)
|
|
return 0;
|
|
sc = ifp->if_softc;
|
|
if (sc->sc_balancing == CARP_BAL_NONE)
|
|
return 0;
|
|
|
|
/*
|
|
* Remove M_MCAST flag from mbuf of balancing ip traffic, since the fact
|
|
* that it is layer 2 multicast does not implicate that it is also layer
|
|
* 3 multicast.
|
|
*/
|
|
if (m->m_flags & M_MCAST &&
|
|
(mtag = m_tag_find(m, PACKET_TAG_CARP_BAL_IP, NULL))) {
|
|
m_tag_delete(m, mtag);
|
|
m->m_flags &= ~M_MCAST;
|
|
}
|
|
|
|
/*
|
|
* Return without making a drop decision. This allows to clear the
|
|
* M_MCAST flag and do nothing else.
|
|
*/
|
|
if (!drop)
|
|
return 0;
|
|
|
|
/*
|
|
* Never drop carp advertisements.
|
|
* XXX Bad idea to pass all broadcast / multicast traffic?
|
|
*/
|
|
if (m->m_flags & (M_BCAST|M_MCAST))
|
|
return 0;
|
|
|
|
fold = src[0] ^ dst[0];
|
|
#ifdef INET6
|
|
if (af == AF_INET6) {
|
|
int i;
|
|
for (i = 1; i < 4; i++)
|
|
fold ^= src[i] ^ dst[i];
|
|
}
|
|
#endif
|
|
if (sc->sc_lscount == 0) /* just to be safe */
|
|
return 1;
|
|
|
|
return ((1 << (ntohl(fold) % sc->sc_lscount)) & sc->sc_lsmask) == 0;
|
|
}
|
|
|
|
void
|
|
carp_timer_down(void *v)
|
|
{
|
|
NET_LOCK();
|
|
carp_master_down(v);
|
|
NET_UNLOCK();
|
|
}
|
|
|
|
void
|
|
carp_master_down(struct carp_vhost_entry *vhe)
|
|
{
|
|
struct carp_softc *sc = vhe->parent_sc;
|
|
|
|
NET_ASSERT_LOCKED();
|
|
|
|
switch (vhe->state) {
|
|
case INIT:
|
|
printf("%s: master_down event in INIT state\n",
|
|
sc->sc_if.if_xname);
|
|
break;
|
|
case MASTER:
|
|
break;
|
|
case BACKUP:
|
|
carp_set_state(vhe, MASTER);
|
|
carp_send_ad(vhe);
|
|
if (sc->sc_balancing == CARP_BAL_NONE && vhe->vhe_leader) {
|
|
carp_send_arp(sc);
|
|
/* Schedule a delayed ARP to deal w/ some L3 switches */
|
|
sc->sc_delayed_arp = 2;
|
|
#ifdef INET6
|
|
carp_send_na(sc);
|
|
#endif /* INET6 */
|
|
}
|
|
carp_setrun(vhe, 0);
|
|
carpstat_inc(carps_preempt);
|
|
break;
|
|
}
|
|
}
|
|
|
|
void
|
|
carp_setrun_all(struct carp_softc *sc, sa_family_t af)
|
|
{
|
|
struct carp_vhost_entry *vhe;
|
|
|
|
KERNEL_ASSERT_LOCKED(); /* touching carp_vhost */
|
|
SRPL_FOREACH_LOCKED(vhe, &sc->carp_vhosts, vhost_entries) {
|
|
carp_setrun(vhe, af);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* When in backup state, af indicates whether to reset the master down timer
|
|
* for v4 or v6. If it's set to zero, reset the ones which are already pending.
|
|
*/
|
|
void
|
|
carp_setrun(struct carp_vhost_entry *vhe, sa_family_t af)
|
|
{
|
|
struct ifnet *ifp;
|
|
struct timeval tv;
|
|
struct carp_softc *sc = vhe->parent_sc;
|
|
|
|
if ((ifp = if_get(sc->sc_carpdevidx)) == NULL) {
|
|
sc->sc_if.if_flags &= ~IFF_RUNNING;
|
|
carp_set_state_all(sc, INIT);
|
|
return;
|
|
}
|
|
|
|
if (memcmp(((struct arpcom *)ifp)->ac_enaddr,
|
|
sc->sc_ac.ac_enaddr, ETHER_ADDR_LEN) == 0)
|
|
sc->sc_realmac = 1;
|
|
else
|
|
sc->sc_realmac = 0;
|
|
|
|
if_put(ifp);
|
|
|
|
if (sc->sc_if.if_flags & IFF_UP && vhe->vhid > 0 &&
|
|
(sc->sc_naddrs || sc->sc_naddrs6) && !sc->sc_suppress) {
|
|
sc->sc_if.if_flags |= IFF_RUNNING;
|
|
} else {
|
|
sc->sc_if.if_flags &= ~IFF_RUNNING;
|
|
return;
|
|
}
|
|
|
|
switch (vhe->state) {
|
|
case INIT:
|
|
carp_set_state(vhe, BACKUP);
|
|
carp_setrun(vhe, 0);
|
|
break;
|
|
case BACKUP:
|
|
timeout_del(&vhe->ad_tmo);
|
|
tv.tv_sec = 3 * sc->sc_advbase;
|
|
if (sc->sc_advbase == 0 && vhe->advskew == 0)
|
|
tv.tv_usec = 3 * 1000000 / 256;
|
|
else if (sc->sc_advbase == 0)
|
|
tv.tv_usec = 3 * vhe->advskew * 1000000 / 256;
|
|
else
|
|
tv.tv_usec = vhe->advskew * 1000000 / 256;
|
|
if (vhe->vhe_leader)
|
|
sc->sc_delayed_arp = -1;
|
|
switch (af) {
|
|
case AF_INET:
|
|
timeout_add_tv(&vhe->md_tmo, &tv);
|
|
break;
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
timeout_add_tv(&vhe->md6_tmo, &tv);
|
|
break;
|
|
#endif /* INET6 */
|
|
default:
|
|
if (sc->sc_naddrs)
|
|
timeout_add_tv(&vhe->md_tmo, &tv);
|
|
if (sc->sc_naddrs6)
|
|
timeout_add_tv(&vhe->md6_tmo, &tv);
|
|
break;
|
|
}
|
|
break;
|
|
case MASTER:
|
|
tv.tv_sec = sc->sc_advbase;
|
|
if (sc->sc_advbase == 0 && vhe->advskew == 0)
|
|
tv.tv_usec = 1 * 1000000 / 256;
|
|
else
|
|
tv.tv_usec = vhe->advskew * 1000000 / 256;
|
|
timeout_add_tv(&vhe->ad_tmo, &tv);
|
|
break;
|
|
}
|
|
}
|
|
|
|
void
|
|
carp_multicast_cleanup(struct carp_softc *sc)
|
|
{
|
|
struct ip_moptions *imo = &sc->sc_imo;
|
|
#ifdef INET6
|
|
struct ip6_moptions *im6o = &sc->sc_im6o;
|
|
#endif
|
|
u_int16_t n = imo->imo_num_memberships;
|
|
|
|
/* Clean up our own multicast memberships */
|
|
while (n-- > 0) {
|
|
if (imo->imo_membership[n] != NULL) {
|
|
in_delmulti(imo->imo_membership[n]);
|
|
imo->imo_membership[n] = NULL;
|
|
}
|
|
}
|
|
imo->imo_num_memberships = 0;
|
|
imo->imo_ifidx = 0;
|
|
|
|
#ifdef INET6
|
|
while (!LIST_EMPTY(&im6o->im6o_memberships)) {
|
|
struct in6_multi_mship *imm =
|
|
LIST_FIRST(&im6o->im6o_memberships);
|
|
|
|
LIST_REMOVE(imm, i6mm_chain);
|
|
in6_leavegroup(imm);
|
|
}
|
|
im6o->im6o_ifidx = 0;
|
|
#endif
|
|
|
|
/* And any other multicast memberships */
|
|
carp_ether_purgemulti(sc);
|
|
}
|
|
|
|
int
|
|
carp_set_ifp(struct carp_softc *sc, struct ifnet *ifp0)
|
|
{
|
|
struct srpl *cif;
|
|
struct carp_softc *vr, *last = NULL, *after = NULL;
|
|
int myself = 0, error = 0;
|
|
|
|
KASSERT(ifp0->if_index != sc->sc_carpdevidx);
|
|
KERNEL_ASSERT_LOCKED(); /* touching if_carp */
|
|
|
|
if ((ifp0->if_flags & IFF_MULTICAST) == 0)
|
|
return (EADDRNOTAVAIL);
|
|
|
|
if (ifp0->if_type != IFT_ETHER)
|
|
return (EINVAL);
|
|
|
|
cif = &ifp0->if_carp;
|
|
if (carp_check_dup_vhids(sc, cif, NULL))
|
|
return (EINVAL);
|
|
|
|
if ((error = ifpromisc(ifp0, 1)))
|
|
return (error);
|
|
|
|
/* detach from old interface */
|
|
if (sc->sc_carpdevidx != 0)
|
|
carpdetach(sc);
|
|
|
|
/* attach carp interface to physical interface */
|
|
if_detachhook_add(ifp0, &sc->sc_dtask);
|
|
if_linkstatehook_add(ifp0, &sc->sc_ltask);
|
|
|
|
sc->sc_carpdevidx = ifp0->if_index;
|
|
sc->sc_if.if_capabilities = ifp0->if_capabilities &
|
|
(IFCAP_CSUM_MASK | IFCAP_TSOv4 | IFCAP_TSOv6);
|
|
|
|
SRPL_FOREACH_LOCKED(vr, cif, sc_list) {
|
|
struct carp_vhost_entry *vrhead, *schead;
|
|
last = vr;
|
|
|
|
if (vr == sc)
|
|
myself = 1;
|
|
|
|
vrhead = SRPL_FIRST_LOCKED(&vr->carp_vhosts);
|
|
schead = SRPL_FIRST_LOCKED(&sc->carp_vhosts);
|
|
if (vrhead->vhid < schead->vhid)
|
|
after = vr;
|
|
}
|
|
|
|
if (!myself) {
|
|
/* We're trying to keep things in order */
|
|
if (last == NULL) {
|
|
SRPL_INSERT_HEAD_LOCKED(&carp_sc_rc, cif,
|
|
sc, sc_list);
|
|
} else if (after == NULL) {
|
|
SRPL_INSERT_AFTER_LOCKED(&carp_sc_rc, last,
|
|
sc, sc_list);
|
|
} else {
|
|
SRPL_INSERT_AFTER_LOCKED(&carp_sc_rc, after,
|
|
sc, sc_list);
|
|
}
|
|
}
|
|
if (sc->sc_naddrs || sc->sc_naddrs6)
|
|
sc->sc_if.if_flags |= IFF_UP;
|
|
carp_set_enaddr(sc);
|
|
|
|
carp_carpdev_state(sc);
|
|
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
carp_set_vhe_enaddr(struct carp_vhost_entry *vhe)
|
|
{
|
|
struct carp_softc *sc = vhe->parent_sc;
|
|
|
|
if (vhe->vhid != 0 && sc->sc_carpdevidx != 0) {
|
|
if (vhe->vhe_leader && sc->sc_balancing == CARP_BAL_IP)
|
|
vhe->vhe_enaddr[0] = 1;
|
|
else
|
|
vhe->vhe_enaddr[0] = 0;
|
|
vhe->vhe_enaddr[1] = 0;
|
|
vhe->vhe_enaddr[2] = 0x5e;
|
|
vhe->vhe_enaddr[3] = 0;
|
|
vhe->vhe_enaddr[4] = 1;
|
|
vhe->vhe_enaddr[5] = vhe->vhid;
|
|
} else
|
|
memset(vhe->vhe_enaddr, 0, ETHER_ADDR_LEN);
|
|
}
|
|
|
|
void
|
|
carp_set_enaddr(struct carp_softc *sc)
|
|
{
|
|
struct carp_vhost_entry *vhe;
|
|
|
|
KERNEL_ASSERT_LOCKED(); /* touching carp_vhosts */
|
|
SRPL_FOREACH_LOCKED(vhe, &sc->carp_vhosts, vhost_entries)
|
|
carp_set_vhe_enaddr(vhe);
|
|
|
|
vhe = SRPL_FIRST_LOCKED(&sc->carp_vhosts);
|
|
|
|
/*
|
|
* Use the carp lladdr if the running one isn't manually set.
|
|
* Only compare static parts of the lladdr.
|
|
*/
|
|
if ((memcmp(sc->sc_ac.ac_enaddr + 1, vhe->vhe_enaddr + 1,
|
|
ETHER_ADDR_LEN - 2) == 0) ||
|
|
(!sc->sc_ac.ac_enaddr[0] && !sc->sc_ac.ac_enaddr[1] &&
|
|
!sc->sc_ac.ac_enaddr[2] && !sc->sc_ac.ac_enaddr[3] &&
|
|
!sc->sc_ac.ac_enaddr[4] && !sc->sc_ac.ac_enaddr[5]))
|
|
bcopy(vhe->vhe_enaddr, sc->sc_ac.ac_enaddr, ETHER_ADDR_LEN);
|
|
|
|
/* Make sure the enaddr has changed before further twiddling. */
|
|
if (memcmp(sc->sc_ac.ac_enaddr, sc->sc_curlladdr, ETHER_ADDR_LEN) != 0) {
|
|
bcopy(sc->sc_ac.ac_enaddr, LLADDR(sc->sc_if.if_sadl),
|
|
ETHER_ADDR_LEN);
|
|
bcopy(sc->sc_ac.ac_enaddr, sc->sc_curlladdr, ETHER_ADDR_LEN);
|
|
#ifdef INET6
|
|
/*
|
|
* (re)attach a link-local address which matches
|
|
* our new MAC address.
|
|
*/
|
|
if (sc->sc_naddrs6)
|
|
in6_ifattach_linklocal(&sc->sc_if, NULL);
|
|
#endif
|
|
carp_set_state_all(sc, INIT);
|
|
carp_setrun_all(sc, 0);
|
|
}
|
|
}
|
|
|
|
void
|
|
carp_addr_updated(void *v)
|
|
{
|
|
struct carp_softc *sc = (struct carp_softc *) v;
|
|
struct ifaddr *ifa;
|
|
int new_naddrs = 0, new_naddrs6 = 0;
|
|
|
|
TAILQ_FOREACH(ifa, &sc->sc_if.if_addrlist, ifa_list) {
|
|
if (ifa->ifa_addr->sa_family == AF_INET)
|
|
new_naddrs++;
|
|
#ifdef INET6
|
|
else if (ifa->ifa_addr->sa_family == AF_INET6)
|
|
new_naddrs6++;
|
|
#endif /* INET6 */
|
|
}
|
|
|
|
/* We received address changes from if_addrhooks callback */
|
|
if (new_naddrs != sc->sc_naddrs || new_naddrs6 != sc->sc_naddrs6) {
|
|
|
|
sc->sc_naddrs = new_naddrs;
|
|
sc->sc_naddrs6 = new_naddrs6;
|
|
|
|
/* Re-establish multicast membership removed by in_control */
|
|
if (IN_MULTICAST(sc->sc_peer.s_addr)) {
|
|
if (!in_hasmulti(&sc->sc_peer, &sc->sc_if)) {
|
|
struct in_multi **imm =
|
|
sc->sc_imo.imo_membership;
|
|
u_int16_t maxmem =
|
|
sc->sc_imo.imo_max_memberships;
|
|
|
|
memset(&sc->sc_imo, 0, sizeof(sc->sc_imo));
|
|
sc->sc_imo.imo_membership = imm;
|
|
sc->sc_imo.imo_max_memberships = maxmem;
|
|
|
|
if (sc->sc_carpdevidx != 0 &&
|
|
sc->sc_naddrs > 0)
|
|
carp_join_multicast(sc);
|
|
}
|
|
}
|
|
|
|
if (sc->sc_naddrs == 0 && sc->sc_naddrs6 == 0) {
|
|
sc->sc_if.if_flags &= ~IFF_UP;
|
|
carp_set_state_all(sc, INIT);
|
|
} else
|
|
carp_hmac_prepare(sc);
|
|
}
|
|
|
|
carp_setrun_all(sc, 0);
|
|
}
|
|
|
|
int
|
|
carp_set_addr(struct carp_softc *sc, struct sockaddr_in *sin)
|
|
{
|
|
struct in_addr *in = &sin->sin_addr;
|
|
int error;
|
|
|
|
KASSERT(sc->sc_carpdevidx != 0);
|
|
|
|
/* XXX is this necessary? */
|
|
if (in->s_addr == INADDR_ANY) {
|
|
carp_setrun_all(sc, 0);
|
|
return (0);
|
|
}
|
|
|
|
if (sc->sc_naddrs == 0 && (error = carp_join_multicast(sc)) != 0)
|
|
return (error);
|
|
|
|
carp_set_state_all(sc, INIT);
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
carp_join_multicast(struct carp_softc *sc)
|
|
{
|
|
struct ip_moptions *imo = &sc->sc_imo;
|
|
struct in_multi *imm;
|
|
struct in_addr addr;
|
|
|
|
if (!IN_MULTICAST(sc->sc_peer.s_addr))
|
|
return (0);
|
|
|
|
addr.s_addr = sc->sc_peer.s_addr;
|
|
if ((imm = in_addmulti(&addr, &sc->sc_if)) == NULL)
|
|
return (ENOBUFS);
|
|
|
|
imo->imo_membership[0] = imm;
|
|
imo->imo_num_memberships = 1;
|
|
imo->imo_ifidx = sc->sc_if.if_index;
|
|
imo->imo_ttl = CARP_DFLTTL;
|
|
imo->imo_loop = 0;
|
|
return (0);
|
|
}
|
|
|
|
|
|
#ifdef INET6
|
|
int
|
|
carp_set_addr6(struct carp_softc *sc, struct sockaddr_in6 *sin6)
|
|
{
|
|
int error;
|
|
|
|
KASSERT(sc->sc_carpdevidx != 0);
|
|
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
|
|
carp_setrun_all(sc, 0);
|
|
return (0);
|
|
}
|
|
|
|
if (sc->sc_naddrs6 == 0 && (error = carp_join_multicast6(sc)) != 0)
|
|
return (error);
|
|
|
|
carp_set_state_all(sc, INIT);
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
carp_join_multicast6(struct carp_softc *sc)
|
|
{
|
|
struct in6_multi_mship *imm, *imm2;
|
|
struct ip6_moptions *im6o = &sc->sc_im6o;
|
|
struct sockaddr_in6 addr6;
|
|
int error;
|
|
|
|
/* Join IPv6 CARP multicast group */
|
|
memset(&addr6, 0, sizeof(addr6));
|
|
addr6.sin6_family = AF_INET6;
|
|
addr6.sin6_len = sizeof(addr6);
|
|
addr6.sin6_addr.s6_addr16[0] = htons(0xff02);
|
|
addr6.sin6_addr.s6_addr16[1] = htons(sc->sc_if.if_index);
|
|
addr6.sin6_addr.s6_addr8[15] = 0x12;
|
|
if ((imm = in6_joingroup(&sc->sc_if,
|
|
&addr6.sin6_addr, &error)) == NULL) {
|
|
return (error);
|
|
}
|
|
/* join solicited multicast address */
|
|
memset(&addr6.sin6_addr, 0, sizeof(addr6.sin6_addr));
|
|
addr6.sin6_addr.s6_addr16[0] = htons(0xff02);
|
|
addr6.sin6_addr.s6_addr16[1] = htons(sc->sc_if.if_index);
|
|
addr6.sin6_addr.s6_addr32[1] = 0;
|
|
addr6.sin6_addr.s6_addr32[2] = htonl(1);
|
|
addr6.sin6_addr.s6_addr32[3] = 0;
|
|
addr6.sin6_addr.s6_addr8[12] = 0xff;
|
|
if ((imm2 = in6_joingroup(&sc->sc_if,
|
|
&addr6.sin6_addr, &error)) == NULL) {
|
|
in6_leavegroup(imm);
|
|
return (error);
|
|
}
|
|
|
|
/* apply v6 multicast membership */
|
|
im6o->im6o_ifidx = sc->sc_if.if_index;
|
|
if (imm)
|
|
LIST_INSERT_HEAD(&im6o->im6o_memberships, imm,
|
|
i6mm_chain);
|
|
if (imm2)
|
|
LIST_INSERT_HEAD(&im6o->im6o_memberships, imm2,
|
|
i6mm_chain);
|
|
|
|
return (0);
|
|
}
|
|
|
|
#endif /* INET6 */
|
|
|
|
int
|
|
carp_ioctl(struct ifnet *ifp, u_long cmd, caddr_t addr)
|
|
{
|
|
struct proc *p = curproc; /* XXX */
|
|
struct carp_softc *sc = ifp->if_softc;
|
|
struct carp_vhost_entry *vhe;
|
|
struct carpreq carpr;
|
|
struct ifaddr *ifa = (struct ifaddr *)addr;
|
|
struct ifreq *ifr = (struct ifreq *)addr;
|
|
struct ifnet *ifp0 = NULL;
|
|
int i, error = 0;
|
|
|
|
switch (cmd) {
|
|
case SIOCSIFADDR:
|
|
if (sc->sc_carpdevidx == 0)
|
|
return (EINVAL);
|
|
|
|
switch (ifa->ifa_addr->sa_family) {
|
|
case AF_INET:
|
|
sc->sc_if.if_flags |= IFF_UP;
|
|
error = carp_set_addr(sc, satosin(ifa->ifa_addr));
|
|
break;
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
sc->sc_if.if_flags |= IFF_UP;
|
|
error = carp_set_addr6(sc, satosin6(ifa->ifa_addr));
|
|
break;
|
|
#endif /* INET6 */
|
|
default:
|
|
error = EAFNOSUPPORT;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case SIOCSIFFLAGS:
|
|
KERNEL_ASSERT_LOCKED(); /* touching carp_vhosts */
|
|
vhe = SRPL_FIRST_LOCKED(&sc->carp_vhosts);
|
|
if (vhe->state != INIT && !(ifr->ifr_flags & IFF_UP)) {
|
|
carp_del_all_timeouts(sc);
|
|
|
|
/* we need the interface up to bow out */
|
|
sc->sc_if.if_flags |= IFF_UP;
|
|
sc->sc_bow_out = 1;
|
|
carp_vhe_send_ad_all(sc);
|
|
sc->sc_bow_out = 0;
|
|
|
|
sc->sc_if.if_flags &= ~IFF_UP;
|
|
carp_set_state_all(sc, INIT);
|
|
carp_setrun_all(sc, 0);
|
|
} else if (vhe->state == INIT && (ifr->ifr_flags & IFF_UP)) {
|
|
sc->sc_if.if_flags |= IFF_UP;
|
|
carp_setrun_all(sc, 0);
|
|
}
|
|
break;
|
|
|
|
case SIOCSVH:
|
|
KERNEL_ASSERT_LOCKED(); /* touching carp_vhosts */
|
|
vhe = SRPL_FIRST_LOCKED(&sc->carp_vhosts);
|
|
if ((error = suser(p)) != 0)
|
|
break;
|
|
if ((error = copyin(ifr->ifr_data, &carpr, sizeof carpr)))
|
|
break;
|
|
error = 1;
|
|
if (carpr.carpr_carpdev[0] != '\0' &&
|
|
(ifp0 = if_unit(carpr.carpr_carpdev)) == NULL)
|
|
return (EINVAL);
|
|
if (carpr.carpr_peer.s_addr == 0)
|
|
sc->sc_peer.s_addr = INADDR_CARP_GROUP;
|
|
else
|
|
sc->sc_peer.s_addr = carpr.carpr_peer.s_addr;
|
|
if (ifp0 != NULL && ifp0->if_index != sc->sc_carpdevidx) {
|
|
if ((error = carp_set_ifp(sc, ifp0))) {
|
|
if_put(ifp0);
|
|
return (error);
|
|
}
|
|
}
|
|
if_put(ifp0);
|
|
if (vhe->state != INIT && carpr.carpr_state != vhe->state) {
|
|
switch (carpr.carpr_state) {
|
|
case BACKUP:
|
|
timeout_del(&vhe->ad_tmo);
|
|
carp_set_state_all(sc, BACKUP);
|
|
carp_setrun_all(sc, 0);
|
|
break;
|
|
case MASTER:
|
|
KERNEL_ASSERT_LOCKED();
|
|
/* touching carp_vhosts */
|
|
SRPL_FOREACH_LOCKED(vhe, &sc->carp_vhosts,
|
|
vhost_entries)
|
|
carp_master_down(vhe);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
if ((error = carp_vhids_ioctl(sc, &carpr)))
|
|
return (error);
|
|
if (carpr.carpr_advbase >= 0) {
|
|
if (carpr.carpr_advbase > 255) {
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
sc->sc_advbase = carpr.carpr_advbase;
|
|
error--;
|
|
}
|
|
if (memcmp(sc->sc_advskews, carpr.carpr_advskews,
|
|
sizeof(sc->sc_advskews))) {
|
|
i = 0;
|
|
KERNEL_ASSERT_LOCKED(); /* touching carp_vhosts */
|
|
SRPL_FOREACH_LOCKED(vhe, &sc->carp_vhosts,
|
|
vhost_entries)
|
|
vhe->advskew = carpr.carpr_advskews[i++];
|
|
bcopy(carpr.carpr_advskews, sc->sc_advskews,
|
|
sizeof(sc->sc_advskews));
|
|
}
|
|
if (sc->sc_balancing != carpr.carpr_balancing) {
|
|
if (carpr.carpr_balancing > CARP_BAL_MAXID) {
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
sc->sc_balancing = carpr.carpr_balancing;
|
|
carp_set_enaddr(sc);
|
|
carp_update_lsmask(sc);
|
|
}
|
|
bcopy(carpr.carpr_key, sc->sc_key, sizeof(sc->sc_key));
|
|
if (error > 0)
|
|
error = EINVAL;
|
|
else {
|
|
error = 0;
|
|
carp_hmac_prepare(sc);
|
|
carp_setrun_all(sc, 0);
|
|
}
|
|
break;
|
|
|
|
case SIOCGVH:
|
|
memset(&carpr, 0, sizeof(carpr));
|
|
if ((ifp0 = if_get(sc->sc_carpdevidx)) != NULL)
|
|
strlcpy(carpr.carpr_carpdev, ifp0->if_xname, IFNAMSIZ);
|
|
if_put(ifp0);
|
|
i = 0;
|
|
KERNEL_ASSERT_LOCKED(); /* touching carp_vhosts */
|
|
SRPL_FOREACH_LOCKED(vhe, &sc->carp_vhosts, vhost_entries) {
|
|
carpr.carpr_vhids[i] = vhe->vhid;
|
|
carpr.carpr_advskews[i] = vhe->advskew;
|
|
carpr.carpr_states[i] = vhe->state;
|
|
i++;
|
|
}
|
|
carpr.carpr_advbase = sc->sc_advbase;
|
|
carpr.carpr_balancing = sc->sc_balancing;
|
|
if (suser(p) == 0)
|
|
bcopy(sc->sc_key, carpr.carpr_key,
|
|
sizeof(carpr.carpr_key));
|
|
carpr.carpr_peer.s_addr = sc->sc_peer.s_addr;
|
|
error = copyout(&carpr, ifr->ifr_data, sizeof(carpr));
|
|
break;
|
|
|
|
case SIOCADDMULTI:
|
|
error = carp_ether_addmulti(sc, ifr);
|
|
break;
|
|
|
|
case SIOCDELMULTI:
|
|
error = carp_ether_delmulti(sc, ifr);
|
|
break;
|
|
case SIOCAIFGROUP:
|
|
case SIOCDIFGROUP:
|
|
if (sc->sc_demote_cnt)
|
|
carp_ifgroup_ioctl(ifp, cmd, addr);
|
|
break;
|
|
case SIOCSIFGATTR:
|
|
carp_ifgattr_ioctl(ifp, cmd, addr);
|
|
break;
|
|
default:
|
|
error = ENOTTY;
|
|
}
|
|
|
|
if (memcmp(sc->sc_ac.ac_enaddr, sc->sc_curlladdr, ETHER_ADDR_LEN) != 0)
|
|
carp_set_enaddr(sc);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
carp_check_dup_vhids(struct carp_softc *sc, struct srpl *cif,
|
|
struct carpreq *carpr)
|
|
{
|
|
struct carp_softc *vr;
|
|
struct carp_vhost_entry *vhe, *vhe0;
|
|
int i;
|
|
|
|
KERNEL_ASSERT_LOCKED(); /* touching if_carp + carp_vhosts */
|
|
|
|
SRPL_FOREACH_LOCKED(vr, cif, sc_list) {
|
|
if (vr == sc)
|
|
continue;
|
|
SRPL_FOREACH_LOCKED(vhe, &vr->carp_vhosts, vhost_entries) {
|
|
if (carpr) {
|
|
for (i = 0; carpr->carpr_vhids[i]; i++) {
|
|
if (vhe->vhid == carpr->carpr_vhids[i])
|
|
return (EINVAL);
|
|
}
|
|
}
|
|
SRPL_FOREACH_LOCKED(vhe0, &sc->carp_vhosts,
|
|
vhost_entries) {
|
|
if (vhe->vhid == vhe0->vhid)
|
|
return (EINVAL);
|
|
}
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
carp_vhids_ioctl(struct carp_softc *sc, struct carpreq *carpr)
|
|
{
|
|
int i, j;
|
|
u_int8_t taken_vhids[256];
|
|
|
|
if (carpr->carpr_vhids[0] == 0 ||
|
|
!memcmp(sc->sc_vhids, carpr->carpr_vhids, sizeof(sc->sc_vhids)))
|
|
return (0);
|
|
|
|
memset(taken_vhids, 0, sizeof(taken_vhids));
|
|
for (i = 0; carpr->carpr_vhids[i]; i++) {
|
|
struct ifnet *ifp;
|
|
|
|
if (taken_vhids[carpr->carpr_vhids[i]])
|
|
return (EINVAL);
|
|
taken_vhids[carpr->carpr_vhids[i]] = 1;
|
|
|
|
if ((ifp = if_get(sc->sc_carpdevidx)) != NULL) {
|
|
struct srpl *cif;
|
|
cif = &ifp->if_carp;
|
|
if (carp_check_dup_vhids(sc, cif, carpr)) {
|
|
if_put(ifp);
|
|
return (EINVAL);
|
|
}
|
|
}
|
|
if_put(ifp);
|
|
if (carpr->carpr_advskews[i] >= 255)
|
|
return (EINVAL);
|
|
}
|
|
/* set sane balancing defaults */
|
|
if (i <= 1)
|
|
carpr->carpr_balancing = CARP_BAL_NONE;
|
|
else if (carpr->carpr_balancing == CARP_BAL_NONE &&
|
|
sc->sc_balancing == CARP_BAL_NONE)
|
|
carpr->carpr_balancing = CARP_BAL_IP;
|
|
|
|
/* destroy all */
|
|
carp_del_all_timeouts(sc);
|
|
carp_destroy_vhosts(sc);
|
|
memset(sc->sc_vhids, 0, sizeof(sc->sc_vhids));
|
|
|
|
/* sort vhosts list by vhid */
|
|
for (j = 1; j <= 255; j++) {
|
|
for (i = 0; carpr->carpr_vhids[i]; i++) {
|
|
if (carpr->carpr_vhids[i] != j)
|
|
continue;
|
|
if (carp_new_vhost(sc, carpr->carpr_vhids[i],
|
|
carpr->carpr_advskews[i]))
|
|
return (ENOMEM);
|
|
sc->sc_vhids[i] = carpr->carpr_vhids[i];
|
|
sc->sc_advskews[i] = carpr->carpr_advskews[i];
|
|
}
|
|
}
|
|
carp_set_enaddr(sc);
|
|
carp_set_state_all(sc, INIT);
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
carp_ifgroup_ioctl(struct ifnet *ifp, u_long cmd, caddr_t addr)
|
|
{
|
|
struct ifgroupreq *ifgr = (struct ifgroupreq *)addr;
|
|
struct ifg_list *ifgl;
|
|
int *dm, adj;
|
|
|
|
if (!strcmp(ifgr->ifgr_group, IFG_ALL))
|
|
return;
|
|
adj = ((struct carp_softc *)ifp->if_softc)->sc_demote_cnt;
|
|
if (cmd == SIOCDIFGROUP)
|
|
adj = adj * -1;
|
|
|
|
TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
|
|
if (!strcmp(ifgl->ifgl_group->ifg_group, ifgr->ifgr_group)) {
|
|
dm = &ifgl->ifgl_group->ifg_carp_demoted;
|
|
if (*dm + adj >= 0)
|
|
*dm += adj;
|
|
else
|
|
*dm = 0;
|
|
}
|
|
}
|
|
|
|
void
|
|
carp_ifgattr_ioctl(struct ifnet *ifp, u_long cmd, caddr_t addr)
|
|
{
|
|
struct ifgroupreq *ifgr = (struct ifgroupreq *)addr;
|
|
struct carp_softc *sc = ifp->if_softc;
|
|
|
|
if (ifgr->ifgr_attrib.ifg_carp_demoted > 0 && (sc->sc_if.if_flags &
|
|
(IFF_UP|IFF_RUNNING)) == (IFF_UP|IFF_RUNNING))
|
|
carp_vhe_send_ad_all(sc);
|
|
}
|
|
|
|
void
|
|
carp_start(struct ifnet *ifp)
|
|
{
|
|
struct carp_softc *sc = ifp->if_softc;
|
|
struct ifnet *ifp0;
|
|
struct mbuf *m;
|
|
|
|
if ((ifp0 = if_get(sc->sc_carpdevidx)) == NULL) {
|
|
ifq_purge(&ifp->if_snd);
|
|
return;
|
|
}
|
|
|
|
while ((m = ifq_dequeue(&ifp->if_snd)) != NULL)
|
|
carp_transmit(sc, ifp0, m);
|
|
if_put(ifp0);
|
|
}
|
|
|
|
void
|
|
carp_transmit(struct carp_softc *sc, struct ifnet *ifp0, struct mbuf *m)
|
|
{
|
|
struct ifnet *ifp = &sc->sc_if;
|
|
|
|
#if NBPFILTER > 0
|
|
{
|
|
caddr_t if_bpf = ifp->if_bpf;
|
|
if (if_bpf)
|
|
bpf_mtap_ether(if_bpf, m, BPF_DIRECTION_OUT);
|
|
}
|
|
#endif /* NBPFILTER > 0 */
|
|
|
|
if (!ISSET(ifp0->if_flags, IFF_RUNNING)) {
|
|
counters_inc(ifp->if_counters, ifc_oerrors);
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Do not leak the multicast address when sending
|
|
* advertisements in 'ip' and 'ip-stealth' balancing
|
|
* modes.
|
|
*/
|
|
if (sc->sc_balancing == CARP_BAL_IP ||
|
|
sc->sc_balancing == CARP_BAL_IPSTEALTH) {
|
|
struct ether_header *eh = mtod(m, struct ether_header *);
|
|
memcpy(eh->ether_shost, sc->sc_ac.ac_enaddr,
|
|
sizeof(eh->ether_shost));
|
|
}
|
|
|
|
if (if_enqueue(ifp0, m))
|
|
counters_inc(ifp->if_counters, ifc_oerrors);
|
|
}
|
|
|
|
int
|
|
carp_enqueue(struct ifnet *ifp, struct mbuf *m)
|
|
{
|
|
struct carp_softc *sc = ifp->if_softc;
|
|
struct ifnet *ifp0;
|
|
|
|
/* no ifq_is_priq, cos hfsc on carp doesn't make sense */
|
|
|
|
/*
|
|
* If the parent of this carp(4) got destroyed while
|
|
* `m' was being processed, silently drop it.
|
|
*/
|
|
if ((ifp0 = if_get(sc->sc_carpdevidx)) == NULL) {
|
|
m_freem(m);
|
|
return (0);
|
|
}
|
|
|
|
counters_pkt(ifp->if_counters,
|
|
ifc_opackets, ifc_obytes, m->m_pkthdr.len);
|
|
carp_transmit(sc, ifp0, m);
|
|
if_put(ifp0);
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
carp_output(struct ifnet *ifp, struct mbuf *m, struct sockaddr *sa,
|
|
struct rtentry *rt)
|
|
{
|
|
struct carp_softc *sc = ((struct carp_softc *)ifp->if_softc);
|
|
struct carp_vhost_entry *vhe;
|
|
struct srp_ref sr;
|
|
int ismaster;
|
|
|
|
if (sc->cur_vhe == NULL) {
|
|
vhe = SRPL_FIRST(&sr, &sc->carp_vhosts);
|
|
ismaster = (vhe->state == MASTER);
|
|
SRPL_LEAVE(&sr);
|
|
} else {
|
|
ismaster = (sc->cur_vhe->state == MASTER);
|
|
}
|
|
|
|
if ((sc->sc_balancing == CARP_BAL_NONE && !ismaster)) {
|
|
m_freem(m);
|
|
return (ENETUNREACH);
|
|
}
|
|
|
|
return (ether_output(ifp, m, sa, rt));
|
|
}
|
|
|
|
void
|
|
carp_set_state_all(struct carp_softc *sc, int state)
|
|
{
|
|
struct carp_vhost_entry *vhe;
|
|
|
|
KERNEL_ASSERT_LOCKED(); /* touching carp_vhosts */
|
|
|
|
SRPL_FOREACH_LOCKED(vhe, &sc->carp_vhosts, vhost_entries) {
|
|
if (vhe->state == state)
|
|
continue;
|
|
|
|
carp_set_state(vhe, state);
|
|
}
|
|
}
|
|
|
|
void
|
|
carp_set_state(struct carp_vhost_entry *vhe, int state)
|
|
{
|
|
struct carp_softc *sc = vhe->parent_sc;
|
|
static const char *carp_states[] = { CARP_STATES };
|
|
int loglevel;
|
|
struct carp_vhost_entry *vhe0;
|
|
|
|
KASSERT(vhe->state != state);
|
|
|
|
if (vhe->state == INIT || state == INIT)
|
|
loglevel = LOG_WARNING;
|
|
else
|
|
loglevel = LOG_CRIT;
|
|
|
|
if (sc->sc_vhe_count > 1)
|
|
CARP_LOG(loglevel, sc,
|
|
("state transition (vhid %d): %s -> %s", vhe->vhid,
|
|
carp_states[vhe->state], carp_states[state]));
|
|
else
|
|
CARP_LOG(loglevel, sc,
|
|
("state transition: %s -> %s",
|
|
carp_states[vhe->state], carp_states[state]));
|
|
|
|
vhe->state = state;
|
|
carp_update_lsmask(sc);
|
|
|
|
KERNEL_ASSERT_LOCKED(); /* touching carp_vhosts */
|
|
|
|
sc->sc_if.if_link_state = LINK_STATE_INVALID;
|
|
SRPL_FOREACH_LOCKED(vhe0, &sc->carp_vhosts, vhost_entries) {
|
|
/*
|
|
* Link must be up if at least one vhe is in state MASTER to
|
|
* bring or keep route up.
|
|
*/
|
|
if (vhe0->state == MASTER) {
|
|
sc->sc_if.if_link_state = LINK_STATE_UP;
|
|
break;
|
|
} else if (vhe0->state == BACKUP) {
|
|
sc->sc_if.if_link_state = LINK_STATE_DOWN;
|
|
}
|
|
}
|
|
if_link_state_change(&sc->sc_if);
|
|
}
|
|
|
|
void
|
|
carp_group_demote_adj(struct ifnet *ifp, int adj, char *reason)
|
|
{
|
|
struct ifg_list *ifgl;
|
|
int *dm, need_ad;
|
|
struct carp_softc *nil = NULL;
|
|
|
|
if (ifp->if_type == IFT_CARP) {
|
|
dm = &((struct carp_softc *)ifp->if_softc)->sc_demote_cnt;
|
|
if (*dm + adj >= 0)
|
|
*dm += adj;
|
|
else
|
|
*dm = 0;
|
|
}
|
|
|
|
need_ad = 0;
|
|
TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) {
|
|
if (!strcmp(ifgl->ifgl_group->ifg_group, IFG_ALL))
|
|
continue;
|
|
dm = &ifgl->ifgl_group->ifg_carp_demoted;
|
|
|
|
if (*dm + adj >= 0)
|
|
*dm += adj;
|
|
else
|
|
*dm = 0;
|
|
|
|
if (adj > 0 && *dm == 1)
|
|
need_ad = 1;
|
|
CARP_LOG(LOG_ERR, nil,
|
|
("%s demoted group %s by %d to %d (%s)",
|
|
ifp->if_xname, ifgl->ifgl_group->ifg_group,
|
|
adj, *dm, reason));
|
|
}
|
|
if (need_ad)
|
|
carp_send_ad_all();
|
|
}
|
|
|
|
int
|
|
carp_group_demote_count(struct carp_softc *sc)
|
|
{
|
|
struct ifg_list *ifgl;
|
|
int count = 0;
|
|
|
|
TAILQ_FOREACH(ifgl, &sc->sc_if.if_groups, ifgl_next)
|
|
count += ifgl->ifgl_group->ifg_carp_demoted;
|
|
|
|
if (count == 0 && sc->sc_demote_cnt)
|
|
count = sc->sc_demote_cnt;
|
|
|
|
return (count > 255 ? 255 : count);
|
|
}
|
|
|
|
void
|
|
carp_carpdev_state(void *v)
|
|
{
|
|
struct carp_softc *sc = v;
|
|
struct ifnet *ifp0;
|
|
int suppressed = sc->sc_suppress;
|
|
|
|
if ((ifp0 = if_get(sc->sc_carpdevidx)) == NULL)
|
|
return;
|
|
|
|
if (ifp0->if_link_state == LINK_STATE_DOWN ||
|
|
!(ifp0->if_flags & IFF_UP)) {
|
|
sc->sc_if.if_flags &= ~IFF_RUNNING;
|
|
carp_del_all_timeouts(sc);
|
|
carp_set_state_all(sc, INIT);
|
|
sc->sc_suppress = 1;
|
|
carp_setrun_all(sc, 0);
|
|
if (!suppressed)
|
|
carp_group_demote_adj(&sc->sc_if, 1, "carpdev");
|
|
} else if (suppressed) {
|
|
carp_set_state_all(sc, INIT);
|
|
sc->sc_suppress = 0;
|
|
carp_setrun_all(sc, 0);
|
|
carp_group_demote_adj(&sc->sc_if, -1, "carpdev");
|
|
}
|
|
|
|
if_put(ifp0);
|
|
}
|
|
|
|
int
|
|
carp_ether_addmulti(struct carp_softc *sc, struct ifreq *ifr)
|
|
{
|
|
struct ifnet *ifp0;
|
|
struct carp_mc_entry *mc;
|
|
u_int8_t addrlo[ETHER_ADDR_LEN], addrhi[ETHER_ADDR_LEN];
|
|
int error;
|
|
|
|
ifp0 = if_get(sc->sc_carpdevidx);
|
|
if (ifp0 == NULL)
|
|
return (EINVAL);
|
|
|
|
error = ether_addmulti(ifr, (struct arpcom *)&sc->sc_ac);
|
|
if (error != ENETRESET) {
|
|
if_put(ifp0);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* This is new multicast address. We have to tell parent
|
|
* about it. Also, remember this multicast address so that
|
|
* we can delete them on unconfigure.
|
|
*/
|
|
mc = malloc(sizeof(*mc), M_DEVBUF, M_NOWAIT);
|
|
if (mc == NULL) {
|
|
error = ENOMEM;
|
|
goto alloc_failed;
|
|
}
|
|
|
|
/*
|
|
* As ether_addmulti() returns ENETRESET, following two
|
|
* statement shouldn't fail.
|
|
*/
|
|
(void)ether_multiaddr(&ifr->ifr_addr, addrlo, addrhi);
|
|
ETHER_LOOKUP_MULTI(addrlo, addrhi, &sc->sc_ac, mc->mc_enm);
|
|
memcpy(&mc->mc_addr, &ifr->ifr_addr, ifr->ifr_addr.sa_len);
|
|
LIST_INSERT_HEAD(&sc->carp_mc_listhead, mc, mc_entries);
|
|
|
|
error = (*ifp0->if_ioctl)(ifp0, SIOCADDMULTI, (caddr_t)ifr);
|
|
if (error != 0)
|
|
goto ioctl_failed;
|
|
|
|
if_put(ifp0);
|
|
|
|
return (error);
|
|
|
|
ioctl_failed:
|
|
LIST_REMOVE(mc, mc_entries);
|
|
free(mc, M_DEVBUF, sizeof(*mc));
|
|
alloc_failed:
|
|
(void)ether_delmulti(ifr, (struct arpcom *)&sc->sc_ac);
|
|
if_put(ifp0);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
carp_ether_delmulti(struct carp_softc *sc, struct ifreq *ifr)
|
|
{
|
|
struct ifnet *ifp0;
|
|
struct ether_multi *enm;
|
|
struct carp_mc_entry *mc;
|
|
u_int8_t addrlo[ETHER_ADDR_LEN], addrhi[ETHER_ADDR_LEN];
|
|
int error;
|
|
|
|
ifp0 = if_get(sc->sc_carpdevidx);
|
|
if (ifp0 == NULL)
|
|
return (EINVAL);
|
|
|
|
/*
|
|
* Find a key to lookup carp_mc_entry. We have to do this
|
|
* before calling ether_delmulti for obvious reason.
|
|
*/
|
|
if ((error = ether_multiaddr(&ifr->ifr_addr, addrlo, addrhi)) != 0)
|
|
goto rele;
|
|
ETHER_LOOKUP_MULTI(addrlo, addrhi, &sc->sc_ac, enm);
|
|
if (enm == NULL) {
|
|
error = EINVAL;
|
|
goto rele;
|
|
}
|
|
|
|
LIST_FOREACH(mc, &sc->carp_mc_listhead, mc_entries)
|
|
if (mc->mc_enm == enm)
|
|
break;
|
|
|
|
/* We won't delete entries we didn't add */
|
|
if (mc == NULL) {
|
|
error = EINVAL;
|
|
goto rele;
|
|
}
|
|
|
|
error = ether_delmulti(ifr, (struct arpcom *)&sc->sc_ac);
|
|
if (error != ENETRESET)
|
|
goto rele;
|
|
|
|
/* We no longer use this multicast address. Tell parent so. */
|
|
error = (*ifp0->if_ioctl)(ifp0, SIOCDELMULTI, (caddr_t)ifr);
|
|
if (error == 0) {
|
|
/* And forget about this address. */
|
|
LIST_REMOVE(mc, mc_entries);
|
|
free(mc, M_DEVBUF, sizeof(*mc));
|
|
} else
|
|
(void)ether_addmulti(ifr, (struct arpcom *)&sc->sc_ac);
|
|
rele:
|
|
if_put(ifp0);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Delete any multicast address we have asked to add from parent
|
|
* interface. Called when the carp is being unconfigured.
|
|
*/
|
|
void
|
|
carp_ether_purgemulti(struct carp_softc *sc)
|
|
{
|
|
struct ifnet *ifp0; /* Parent. */
|
|
struct carp_mc_entry *mc;
|
|
union {
|
|
struct ifreq ifreq;
|
|
struct {
|
|
char ifr_name[IFNAMSIZ];
|
|
struct sockaddr_storage ifr_ss;
|
|
} ifreq_storage;
|
|
} u;
|
|
struct ifreq *ifr = &u.ifreq;
|
|
|
|
if ((ifp0 = if_get(sc->sc_carpdevidx)) == NULL)
|
|
return;
|
|
|
|
memcpy(ifr->ifr_name, ifp0->if_xname, IFNAMSIZ);
|
|
while ((mc = LIST_FIRST(&sc->carp_mc_listhead)) != NULL) {
|
|
memcpy(&ifr->ifr_addr, &mc->mc_addr, mc->mc_addr.ss_len);
|
|
(void)(*ifp0->if_ioctl)(ifp0, SIOCDELMULTI, (caddr_t)ifr);
|
|
LIST_REMOVE(mc, mc_entries);
|
|
free(mc, M_DEVBUF, sizeof(*mc));
|
|
}
|
|
|
|
if_put(ifp0);
|
|
}
|
|
|
|
void
|
|
carp_vh_ref(void *null, void *v)
|
|
{
|
|
struct carp_vhost_entry *vhe = v;
|
|
|
|
refcnt_take(&vhe->vhost_refcnt);
|
|
}
|
|
|
|
void
|
|
carp_vh_unref(void *null, void *v)
|
|
{
|
|
struct carp_vhost_entry *vhe = v;
|
|
|
|
if (refcnt_rele(&vhe->vhost_refcnt)) {
|
|
carp_sc_unref(NULL, vhe->parent_sc);
|
|
free(vhe, M_DEVBUF, sizeof(*vhe));
|
|
}
|
|
}
|
|
|
|
void
|
|
carp_sc_ref(void *null, void *s)
|
|
{
|
|
struct carp_softc *sc = s;
|
|
|
|
refcnt_take(&sc->sc_refcnt);
|
|
}
|
|
|
|
void
|
|
carp_sc_unref(void *null, void *s)
|
|
{
|
|
struct carp_softc *sc = s;
|
|
|
|
refcnt_rele_wake(&sc->sc_refcnt);
|
|
}
|