+++ /dev/null
-/*
- * Copyright (c) 2000-2013 Apple Inc. All rights reserved.
- *
- * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
- *
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. The rights granted to you under the License
- * may not be used to create, or enable the creation or redistribution of,
- * unlawful or unlicensed copies of an Apple operating system, or to
- * circumvent, violate, or enable the circumvention or violation of, any
- * terms of an Apple operating system software license agreement.
- *
- * Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- *
- * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
- */
-/*
- * NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce
- * support for mandatory and extensible security protections. This notice
- * is included in support of clause 2.2 (b) of the Apple Public License,
- * Version 2.0.
- */
-/*
- * IP multicast forwarding procedures
- *
- * Written by David Waitzman, BBN Labs, August 1988.
- * Modified by Steve Deering, Stanford, February 1989.
- * Modified by Mark J. Steiglitz, Stanford, May, 1991
- * Modified by Van Jacobson, LBL, January 1993
- * Modified by Ajit Thyagarajan, PARC, August 1993
- * Modified by Bill Fenner, PARC, April 1995
- *
- * MROUTING Revision: 3.5
- * $FreeBSD: src/sys/netinet/ip_mroute.c,v 1.56.2.2 2001/07/19 06:37:26 kris Exp $
- */
-
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/malloc.h>
-#include <sys/mbuf.h>
-#include <sys/socket.h>
-#include <sys/socketvar.h>
-#include <sys/protosw.h>
-#include <sys/time.h>
-#include <sys/kernel.h>
-#include <sys/sockio.h>
-#include <sys/syslog.h>
-
-#include <machine/endian.h>
-
-#include <net/if.h>
-#include <net/route.h>
-#include <net/kpi_protocol.h>
-#include <netinet/in.h>
-#include <netinet/in_systm.h>
-#include <netinet/ip.h>
-#include <netinet/ip_var.h>
-#include <netinet/in_var.h>
-#include <netinet/igmp.h>
-#include <netinet/ip_mroute.h>
-#include <netinet/udp.h>
-
-#if CONFIG_MACF_NET
-#include <security/mac_framework.h>
-#endif
-
-
-#if !MROUTING
-extern u_int32_t _ip_mcast_src(int vifi);
-extern int _ip_mforward(struct ip *ip, struct ifnet *ifp,
- struct mbuf *m, struct ip_moptions *imo);
-extern int _ip_mrouter_done(void);
-extern int _ip_mrouter_get(struct socket *so, struct sockopt *sopt);
-extern int _ip_mrouter_set(struct socket *so, struct sockopt *sopt);
-extern int _mrt_ioctl(int req, caddr_t data, struct proc *p);
-
-/*
- * Dummy routines and globals used when multicast routing is not compiled in.
- */
-
-struct socket *ip_mrouter = NULL;
-u_int rsvpdebug = 0;
-
-int
-_ip_mrouter_set(__unused struct socket *so,
- __unused struct sockopt *sopt)
-{
- return(EOPNOTSUPP);
-}
-
-int (*ip_mrouter_set)(struct socket *, struct sockopt *) = _ip_mrouter_set;
-
-
-int
-_ip_mrouter_get(__unused struct socket *so,
- __unused sockopt *sopt)
-{
- return(EOPNOTSUPP);
-}
-
-int (*ip_mrouter_get)(struct socket *, struct sockopt *) = _ip_mrouter_get;
-
-int
-_ip_mrouter_done(void)
-{
- return(0);
-}
-
-int (*ip_mrouter_done)(void) = _ip_mrouter_done;
-
-int
-_ip_mforward(__unused struct ip *ip, __unused struct ifnet *ifp,
- __unused struct mbuf *m, __unused ip_moptions *imo)
-{
- return(0);
-}
-
-int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *,
- struct ip_moptions *) = _ip_mforward;
-
-int
-_mrt_ioctl(__unused u_long req, __unused caddr_t data, __unused struct proc *p)
-{
- return EOPNOTSUPP;
-}
-
-int (*mrt_ioctl)(u_long, caddr_t, struct proc *) = _mrt_ioctl;
-
-void
-rsvp_input(struct mbuf *m, int iphlen) /* XXX must fixup manually */
-{
- /* Can still get packets with rsvp_on = 0 if there is a local member
- * of the group to which the RSVP packet is addressed. But in this
- * case we want to throw the packet away.
- */
- if (!rsvp_on) {
- m_freem(m);
- return;
- }
-
- if (ip_rsvpd != NULL) {
- if (rsvpdebug)
- printf("rsvp_input: Sending packet up old-style socket\n");
- rip_input(m, iphlen);
- return;
- }
- /* Drop the packet */
- m_freem(m);
-}
-
-void ipip_input(struct mbuf *m, int iphlen) { /* XXX must fixup manually */
- rip_input(m, iphlen);
-}
-
-int (*legal_vif_num)(int) = 0;
-
-/*
- * This should never be called, since IP_MULTICAST_VIF should fail, but
- * just in case it does get called, the code a little lower in ip_output
- * will assign the packet a local address.
- */
-u_int32_t
-_ip_mcast_src(int vifi) { return INADDR_ANY; }
-u_int32_t (*ip_mcast_src)(int) = _ip_mcast_src;
-
-int
-ip_rsvp_vif_init(so, sopt)
- struct socket *so;
- struct sockopt *sopt;
-{
- return(EINVAL);
-}
-
-int
-ip_rsvp_vif_done(so, sopt)
- struct socket *so;
- struct sockopt *sopt;
-{
- return(EINVAL);
-}
-
-void
-ip_rsvp_force_done(so)
- struct socket *so;
-{
- return;
-}
-
-#else /* MROUTING */
-
-#define M_HASCL(m) ((m)->m_flags & M_EXT)
-
-#define INSIZ sizeof(struct in_addr)
-#define same(a1, a2) \
- (bcmp((caddr_t)(a1), (caddr_t)(a2), INSIZ) == 0)
-
-
-/*
- * Globals. All but ip_mrouter and ip_mrtproto could be static,
- * except for netstat or debugging purposes.
- */
-#ifndef MROUTE_LKM
-struct socket *ip_mrouter = NULL;
-static struct mrtstat mrtstat;
-#else /* MROUTE_LKM */
-extern void X_ipip_input(struct mbuf *m, int iphlen);
-extern struct mrtstat mrtstat;
-static int ip_mrtproto;
-#endif
-
-#define NO_RTE_FOUND 0x1
-#define RTE_FOUND 0x2
-
-static struct mfc *mfctable[CONFIG_MFCTBLSIZ];
-static u_char nexpire[CONFIG_MFCTBLSIZ];
-static struct vif viftable[CONFIG_MAXVIFS];
-static u_int mrtdebug = 0; /* debug level */
-#define DEBUG_MFC 0x02
-#define DEBUG_FORWARD 0x04
-#define DEBUG_EXPIRE 0x08
-#define DEBUG_XMIT 0x10
-static u_int tbfdebug = 0; /* tbf debug level */
-static u_int rsvpdebug = 0; /* rsvp debug level */
-
-#define EXPIRE_TIMEOUT (hz / 4) /* 4x / second */
-#define UPCALL_EXPIRE 6 /* number of timeouts */
-
-/*
- * Define the token bucket filter structures
- * tbftable -> each vif has one of these for storing info
- */
-
-static struct tbf tbftable[CONFIG_MAXVIFS];
-#define TBF_REPROCESS (hz / 100) /* 100x / second */
-
-/*
- * 'Interfaces' associated with decapsulator (so we can tell
- * packets that went through it from ones that get reflected
- * by a broken gateway). These interfaces are never linked into
- * the system ifnet list & no routes point to them. I.e., packets
- * can't be sent this way. They only exist as a placeholder for
- * multicast source verification.
- */
-static struct ifnet multicast_decap_if[CONFIG_MAXVIFS];
-
-#define ENCAP_TTL 64
-#define ENCAP_PROTO IPPROTO_IPIP /* 4 */
-
-/* prototype IP hdr for encapsulated packets */
-static struct ip multicast_encap_iphdr = {
-#if BYTE_ORDER == LITTLE_ENDIAN
- sizeof(struct ip) >> 2, IPVERSION,
-#else
- IPVERSION, sizeof(struct ip) >> 2,
-#endif
- 0, /* tos */
- sizeof(struct ip), /* total length */
- 0, /* id */
- 0, /* frag offset */
- ENCAP_TTL, ENCAP_PROTO,
- 0, /* checksum */
- { 0 }, { 0 }
-};
-
-/*
- * Private variables.
- */
-static vifi_t numvifs = 0;
-static int have_encap_tunnel = 0;
-
-/*
- * one-back cache used by ipip_input to locate a tunnel's vif
- * given a datagram's src ip address.
- */
-static u_int32_t last_encap_src;
-static struct vif *last_encap_vif;
-
-static u_int32_t X_ip_mcast_src(int vifi);
-static int X_ip_mforward(struct ip *ip, struct ifnet *ifp, struct mbuf *m, struct ip_moptions *imo);
-static int X_ip_mrouter_done(void);
-static int X_ip_mrouter_get(struct socket *so, struct sockopt *m);
-static int X_ip_mrouter_set(struct socket *so, struct sockopt *m);
-static int X_legal_vif_num(int vif);
-static int X_mrt_ioctl(u_long cmd, caddr_t data);
-
-static int get_sg_cnt(struct sioc_sg_req *);
-static int get_vif_cnt(struct sioc_vif_req *);
-static int ip_mrouter_init(struct socket *, int);
-static int add_vif(struct vifctl *);
-static int del_vif(vifi_t);
-static int add_mfc(struct mfcctl *);
-static int del_mfc(struct mfcctl *);
-static int socket_send(struct socket *, struct mbuf *, struct sockaddr_in *);
-static int set_assert(int);
-static void expire_upcalls(void *);
-static int ip_mdq(struct mbuf *, struct ifnet *, struct mfc *,
- vifi_t);
-static void phyint_send(struct ip *, struct vif *, struct mbuf *);
-static void encap_send(struct ip *, struct vif *, struct mbuf *);
-static void tbf_control(struct vif *, struct mbuf *, struct ip *, u_int32_t);
-static void tbf_queue(struct vif *, struct mbuf *);
-static void tbf_process_q(struct vif *);
-static void tbf_reprocess_q(void *);
-static int tbf_dq_sel(struct vif *, struct ip *);
-static void tbf_send_packet(struct vif *, struct mbuf *);
-static void tbf_update_tokens(struct vif *);
-static int priority(struct vif *, struct ip *);
-void multiencap_decap(struct mbuf *);
-
-/*
- * whether or not special PIM assert processing is enabled.
- */
-static int pim_assert;
-/*
- * Rate limit for assert notification messages, in usec
- */
-#define ASSERT_MSG_TIME 3000000
-
-/*
- * Hash function for a source, group entry
- */
-#define MFCHASH(a, g) MFCHASHMOD(((a) >> 20) ^ ((a) >> 10) ^ (a) ^ \
- ((g) >> 20) ^ ((g) >> 10) ^ (g))
-
-/*
- * Find a route for a given origin IP address and Multicast group address
- * Type of service parameter to be added in the future!!!
- */
-
-#define MFCFIND(o, g, rt) { \
- struct mfc *_rt = mfctable[MFCHASH(o,g)]; \
- rt = NULL; \
- ++mrtstat.mrts_mfc_lookups; \
- while (_rt) { \
- if ((_rt->mfc_origin.s_addr == o) && \
- (_rt->mfc_mcastgrp.s_addr == g) && \
- (_rt->mfc_stall == NULL)) { \
- rt = _rt; \
- break; \
- } \
- _rt = _rt->mfc_next; \
- } \
- if (rt == NULL) { \
- ++mrtstat.mrts_mfc_misses; \
- } \
-}
-
-
-/*
- * Macros to compute elapsed time efficiently
- * Borrowed from Van Jacobson's scheduling code
- */
-#define TV_DELTA(a, b, delta) { \
- int xxs; \
- \
- delta = (a).tv_usec - (b).tv_usec; \
- if ((xxs = (a).tv_sec - (b).tv_sec)) { \
- switch (xxs) { \
- case 2: \
- delta += 1000000; \
- /* fall through */ \
- case 1: \
- delta += 1000000; \
- break; \
- default: \
- delta += (1000000 * xxs); \
- } \
- } \
-}
-
-#define TV_LT(a, b) (((a).tv_usec < (b).tv_usec && \
- (a).tv_sec <= (b).tv_sec) || (a).tv_sec < (b).tv_sec)
-
-#if UPCALL_TIMING
-u_int32_t upcall_data[51];
-static void collate(struct timeval *);
-#endif /* UPCALL_TIMING */
-
-
-/*
- * Handle MRT setsockopt commands to modify the multicast routing tables.
- */
-static int
-X_ip_mrouter_set(struct socket *so, struct sockopt *sopt)
-{
- int error, optval;
- vifi_t vifi;
- struct vifctl vifc;
- struct mfcctl mfc;
-
- if (so != ip_mrouter && sopt->sopt_name != MRT_INIT)
- return (EPERM);
-
- error = 0;
- switch (sopt->sopt_name) {
- case MRT_INIT:
- error = sooptcopyin(sopt, &optval, sizeof optval,
- sizeof optval);
- if (error)
- break;
- error = ip_mrouter_init(so, optval);
- break;
-
- case MRT_DONE:
- error = ip_mrouter_done();
- break;
-
- case MRT_ADD_VIF:
- error = sooptcopyin(sopt, &vifc, sizeof vifc, sizeof vifc);
- if (error)
- break;
- error = add_vif(&vifc);
- break;
-
- case MRT_DEL_VIF:
- error = sooptcopyin(sopt, &vifi, sizeof vifi, sizeof vifi);
- if (error)
- break;
- error = del_vif(vifi);
- break;
-
- case MRT_ADD_MFC:
- case MRT_DEL_MFC:
- error = sooptcopyin(sopt, &mfc, sizeof mfc, sizeof mfc);
- if (error)
- break;
- if (sopt->sopt_name == MRT_ADD_MFC)
- error = add_mfc(&mfc);
- else
- error = del_mfc(&mfc);
- break;
-
- case MRT_ASSERT:
- error = sooptcopyin(sopt, &optval, sizeof optval,
- sizeof optval);
- if (error)
- break;
- set_assert(optval);
- break;
-
- default:
- error = EOPNOTSUPP;
- break;
- }
- return (error);
-}
-
-#if !defined(MROUTE_LKM) || !MROUTE_LKM
-int (*ip_mrouter_set)(struct socket *, struct sockopt *) = X_ip_mrouter_set;
-#endif
-
-/*
- * Handle MRT getsockopt commands
- */
-static int
-X_ip_mrouter_get(__unused struct socket *so, struct sockopt *sopt)
-{
- int error;
- static int vers = 0x0305; /* !!! why is this here? XXX */
-
- switch (sopt->sopt_name) {
- case MRT_VERSION:
- error = sooptcopyout(sopt, &vers, sizeof vers);
- break;
-
- case MRT_ASSERT:
- error = sooptcopyout(sopt, &pim_assert, sizeof pim_assert);
- break;
- default:
- error = EOPNOTSUPP;
- break;
- }
- return (error);
-}
-
-#if !defined(MROUTE_LKM) || !MROUTE_LKM
-int (*ip_mrouter_get)(struct socket *, struct sockopt *) = X_ip_mrouter_get;
-#endif
-
-/*
- * Handle ioctl commands to obtain information from the cache
- */
-static int
-X_mrt_ioctl(u_long cmd, caddr_t data)
-{
- int error = 0;
-
- switch (cmd) {
- case (SIOCGETVIFCNT):
- return (get_vif_cnt((struct sioc_vif_req *)data));
- break;
- case (SIOCGETSGCNT):
- return (get_sg_cnt((struct sioc_sg_req *)data));
- break;
- default:
- return (EINVAL);
- break;
- }
- return error;
-}
-
-#if !defined(MROUTE_LKM) || !MROUTE_LKM
-int (*mrt_ioctl)(u_long, caddr_t) = X_mrt_ioctl;
-#endif
-
-/*
- * returns the packet, byte, rpf-failure count for the source group provided
- */
-static int
-get_sg_cnt(struct sioc_sg_req *req)
-{
- struct mfc *rt;
-
- MFCFIND(req->src.s_addr, req->grp.s_addr, rt);
- if (rt != NULL) {
- req->pktcnt = rt->mfc_pkt_cnt;
- req->bytecnt = rt->mfc_byte_cnt;
- req->wrong_if = rt->mfc_wrong_if;
- } else
- req->pktcnt = req->bytecnt = req->wrong_if = 0xffffffff;
-
- return 0;
-}
-
-/*
- * returns the input and output packet and byte counts on the vif provided
- */
-static int
-get_vif_cnt(struct sioc_vif_req *req)
-{
- vifi_t vifi = req->vifi;
-
- if (vifi >= numvifs) return EINVAL;
-
- req->icount = viftable[vifi].v_pkt_in;
- req->ocount = viftable[vifi].v_pkt_out;
- req->ibytes = viftable[vifi].v_bytes_in;
- req->obytes = viftable[vifi].v_bytes_out;
-
- return 0;
-}
-
-/*
- * Enable multicast routing
- */
-static int
-ip_mrouter_init(struct socket *so, int vers)
-{
- if (mrtdebug)
- log(LOG_DEBUG,"ip_mrouter_init: so_type = %d, pr_protocol = %d\n",
- so->so_type, so->so_proto->pr_protocol);
-
- if (so->so_type != SOCK_RAW ||
- so->so_proto->pr_protocol != IPPROTO_IGMP) return EOPNOTSUPP;
-
- if (vers != 1)
- return ENOPROTOOPT;
-
- if (ip_mrouter != NULL) return EADDRINUSE;
-
- ip_mrouter = so;
-
- bzero((caddr_t)mfctable, sizeof(mfctable));
- bzero((caddr_t)nexpire, sizeof(nexpire));
-
- pim_assert = 0;
-
- timeout(expire_upcalls, (caddr_t)NULL, EXPIRE_TIMEOUT);
-
- if (mrtdebug)
- log(LOG_DEBUG, "ip_mrouter_init\n");
-
- return 0;
-}
-
-/*
- * Disable multicast routing
- */
-static int
-X_ip_mrouter_done(void)
-{
- vifi_t vifi;
- int i;
- struct ifnet *ifp;
- struct ifreq ifr;
- struct mfc *rt;
- struct rtdetq *rte;
-
- /*
- * For each phyint in use, disable promiscuous reception of all IP
- * multicasts.
- */
- for (vifi = 0; vifi < numvifs; vifi++) {
- if (viftable[vifi].v_lcl_addr.s_addr != 0 &&
- !(viftable[vifi].v_flags & VIFF_TUNNEL)) {
- ((struct sockaddr_in *)&(ifr.ifr_addr))->sin_family = AF_INET;
- ((struct sockaddr_in *)&(ifr.ifr_addr))->sin_addr.s_addr
- = INADDR_ANY;
- ifp = viftable[vifi].v_ifp;
- if_allmulti(ifp, 0);
- }
- }
- bzero((caddr_t)tbftable, sizeof(tbftable));
- bzero((caddr_t)viftable, sizeof(viftable));
- numvifs = 0;
- pim_assert = 0;
-
- untimeout(expire_upcalls, (caddr_t)NULL);
-
- /*
- * Free all multicast forwarding cache entries.
- */
- for (i = 0; i < CONFIG_MFCTBLSIZ; i++) {
- for (rt = mfctable[i]; rt != NULL; ) {
- struct mfc *nr = rt->mfc_next;
-
- for (rte = rt->mfc_stall; rte != NULL; ) {
- struct rtdetq *n = rte->next;
-
- m_freem(rte->m);
- FREE(rte, M_MRTABLE);
- rte = n;
- }
- FREE(rt, M_MRTABLE);
- rt = nr;
- }
- }
-
- bzero((caddr_t)mfctable, sizeof(mfctable));
-
- /*
- * Reset de-encapsulation cache
- */
- last_encap_src = 0;
- last_encap_vif = NULL;
- have_encap_tunnel = 0;
-
- ip_mrouter = NULL;
-
- if (mrtdebug)
- log(LOG_DEBUG, "ip_mrouter_done\n");
-
- return 0;
-}
-
-#if !defined(MROUTE_LKM) || !MROUTE_LKM
-int (*ip_mrouter_done)(void) = X_ip_mrouter_done;
-#endif
-
-/*
- * Set PIM assert processing global
- */
-static int
-set_assert(int i)
-{
- if ((i != 1) && (i != 0))
- return EINVAL;
-
- pim_assert = i;
-
- return 0;
-}
-
-/*
- * Add a vif to the vif table
- */
-static int
-add_vif(struct vifctl *vifcp)
-{
- struct vif *vifp = viftable + vifcp->vifc_vifi;
- static struct sockaddr_in sin = { sizeof sin, AF_INET,
- 0 , {0}, {0,0,0,0,0,0,0,0,} };
- struct ifaddr *ifa;
- struct ifnet *ifp;
- int error, s;
- struct tbf *v_tbf = tbftable + vifcp->vifc_vifi;
-
- if (vifcp->vifc_vifi >= CONFIG_MAXVIFS) return EINVAL;
- if (vifp->v_lcl_addr.s_addr != 0) return EADDRINUSE;
-
- /* Find the interface with an address in AF_INET family */
- sin.sin_addr = vifcp->vifc_lcl_addr;
- ifa = ifa_ifwithaddr((struct sockaddr *)&sin);
- if (ifa == 0) return EADDRNOTAVAIL;
- ifp = ifa->ifa_ifp;
- IFA_REMREF(ifa);
- ifa = NULL;
-
- if (vifcp->vifc_flags & VIFF_TUNNEL) {
- if ((vifcp->vifc_flags & VIFF_SRCRT) == 0) {
- /*
- * An encapsulating tunnel is wanted. Tell ipip_input() to
- * start paying attention to encapsulated packets.
- */
- if (have_encap_tunnel == 0) {
- have_encap_tunnel = 1;
- for (s = 0; s < CONFIG_MAXVIFS; ++s) {
- multicast_decap_if[s].if_name = "mdecap";
- multicast_decap_if[s].if_unit = s;
- multicast_decap_if[s].if_family = APPLE_IF_FAM_MDECAP;
- }
- }
- /*
- * Set interface to fake encapsulator interface
- */
- ifp = &multicast_decap_if[vifcp->vifc_vifi];
- } else {
- log(LOG_ERR, "source routed tunnels not supported\n");
- return EOPNOTSUPP;
- }
- } else {
- /* Make sure the interface supports multicast */
- if ((ifp->if_flags & IFF_MULTICAST) == 0)
- return EOPNOTSUPP;
-
- /* Enable promiscuous reception of all IP multicasts from the if */
- error = if_allmulti(ifp, 1);
- if (error)
- return error;
- }
-
- /* define parameters for the tbf structure */
- vifp->v_tbf = v_tbf;
- GET_TIME(vifp->v_tbf->tbf_last_pkt_t);
- vifp->v_tbf->tbf_n_tok = 0;
- vifp->v_tbf->tbf_q_len = 0;
- vifp->v_tbf->tbf_max_q_len = MAXQSIZE;
- vifp->v_tbf->tbf_q = vifp->v_tbf->tbf_t = NULL;
-
- vifp->v_flags = vifcp->vifc_flags;
- vifp->v_threshold = vifcp->vifc_threshold;
- vifp->v_lcl_addr = vifcp->vifc_lcl_addr;
- vifp->v_rmt_addr = vifcp->vifc_rmt_addr;
- vifp->v_ifp = ifp;
- /* scaling up here allows division by 1024 in critical code */
- vifp->v_rate_limit= vifcp->vifc_rate_limit * 1024 / 1000;
- vifp->v_rsvp_on = 0;
- vifp->v_rsvpd = NULL;
- /* initialize per vif pkt counters */
- vifp->v_pkt_in = 0;
- vifp->v_pkt_out = 0;
- vifp->v_bytes_in = 0;
- vifp->v_bytes_out = 0;
-
- /* Adjust numvifs up if the vifi is higher than numvifs */
- if (numvifs <= vifcp->vifc_vifi) numvifs = vifcp->vifc_vifi + 1;
-
- if (mrtdebug)
- log(LOG_DEBUG, "add_vif #%d, lcladdr %lx, %s %lx, thresh %x, rate %d\n",
- vifcp->vifc_vifi,
- (u_int32_t)ntohl(vifcp->vifc_lcl_addr.s_addr),
- (vifcp->vifc_flags & VIFF_TUNNEL) ? "rmtaddr" : "mask",
- (u_int32_t)ntohl(vifcp->vifc_rmt_addr.s_addr),
- vifcp->vifc_threshold,
- vifcp->vifc_rate_limit);
-
- return 0;
-}
-
-/*
- * Delete a vif from the vif table
- */
-static int
-del_vif(vifi_t vifi)
-{
- struct vif *vifp = &viftable[vifi];
- struct mbuf *m;
- struct ifnet *ifp;
- struct ifreq ifr;
-
- if (vifi >= numvifs) return EINVAL;
- if (vifp->v_lcl_addr.s_addr == 0) return EADDRNOTAVAIL;
-
- if (!(vifp->v_flags & VIFF_TUNNEL)) {
- ((struct sockaddr_in *)&(ifr.ifr_addr))->sin_family = AF_INET;
- ((struct sockaddr_in *)&(ifr.ifr_addr))->sin_addr.s_addr = INADDR_ANY;
- ifp = vifp->v_ifp;
- if_allmulti(ifp, 0);
- }
-
- if (vifp == last_encap_vif) {
- last_encap_vif = 0;
- last_encap_src = 0;
- }
-
- /*
- * Free packets queued at the interface
- */
- while (vifp->v_tbf->tbf_q) {
- m = vifp->v_tbf->tbf_q;
- vifp->v_tbf->tbf_q = m->m_act;
- m_freem(m);
- }
-
- bzero((caddr_t)vifp->v_tbf, sizeof(*(vifp->v_tbf)));
- bzero((caddr_t)vifp, sizeof (*vifp));
-
- if (mrtdebug)
- log(LOG_DEBUG, "del_vif %d, numvifs %d\n", vifi, numvifs);
-
- /* Adjust numvifs down */
- for (vifi = numvifs; vifi > 0; vifi--)
- if (viftable[vifi-1].v_lcl_addr.s_addr != 0) break;
- numvifs = vifi;
-
- return 0;
-}
-
-/*
- * Add an mfc entry
- */
-static int
-add_mfc(struct mfcctl *mfccp)
-{
- struct mfc *rt;
- u_int32_t hash;
- struct rtdetq *rte;
- u_short nstl;
- int i;
-
- MFCFIND(mfccp->mfcc_origin.s_addr, mfccp->mfcc_mcastgrp.s_addr, rt);
-
- /* If an entry already exists, just update the fields */
- if (rt) {
- if (mrtdebug & DEBUG_MFC)
- log(LOG_DEBUG,"add_mfc update o %lx g %lx p %x\n",
- (u_int32_t)ntohl(mfccp->mfcc_origin.s_addr),
- (u_int32_t)ntohl(mfccp->mfcc_mcastgrp.s_addr),
- mfccp->mfcc_parent);
-
- rt->mfc_parent = mfccp->mfcc_parent;
- for (i = 0; i < numvifs; i++)
- rt->mfc_ttls[i] = mfccp->mfcc_ttls[i];
- return 0;
- }
-
- /*
- * Find the entry for which the upcall was made and update
- */
- hash = MFCHASH(mfccp->mfcc_origin.s_addr, mfccp->mfcc_mcastgrp.s_addr);
- for (rt = mfctable[hash], nstl = 0; rt; rt = rt->mfc_next) {
-
- if ((rt->mfc_origin.s_addr == mfccp->mfcc_origin.s_addr) &&
- (rt->mfc_mcastgrp.s_addr == mfccp->mfcc_mcastgrp.s_addr) &&
- (rt->mfc_stall != NULL)) {
-
- if (nstl++)
- log(LOG_ERR, "add_mfc %s o %lx g %lx p %x dbx %p\n",
- "multiple kernel entries",
- (u_int32_t)ntohl(mfccp->mfcc_origin.s_addr),
- (u_int32_t)ntohl(mfccp->mfcc_mcastgrp.s_addr),
- mfccp->mfcc_parent, (void *)rt->mfc_stall);
-
- if (mrtdebug & DEBUG_MFC)
- log(LOG_DEBUG,"add_mfc o %lx g %lx p %x dbg %p\n",
- (u_int32_t)ntohl(mfccp->mfcc_origin.s_addr),
- (u_int32_t)ntohl(mfccp->mfcc_mcastgrp.s_addr),
- mfccp->mfcc_parent, (void *)rt->mfc_stall);
-
- rt->mfc_origin = mfccp->mfcc_origin;
- rt->mfc_mcastgrp = mfccp->mfcc_mcastgrp;
- rt->mfc_parent = mfccp->mfcc_parent;
- for (i = 0; i < numvifs; i++)
- rt->mfc_ttls[i] = mfccp->mfcc_ttls[i];
- /* initialize pkt counters per src-grp */
- rt->mfc_pkt_cnt = 0;
- rt->mfc_byte_cnt = 0;
- rt->mfc_wrong_if = 0;
- rt->mfc_last_assert.tv_sec = rt->mfc_last_assert.tv_usec = 0;
-
- rt->mfc_expire = 0; /* Don't clean this guy up */
- nexpire[hash]--;
-
- /* free packets Qed at the end of this entry */
- for (rte = rt->mfc_stall; rte != NULL; ) {
- struct rtdetq *n = rte->next;
-
- ip_mdq(rte->m, rte->ifp, rt, -1);
- m_freem(rte->m);
-#if UPCALL_TIMING
- collate(&(rte->t));
-#endif /* UPCALL_TIMING */
- FREE(rte, M_MRTABLE);
- rte = n;
- }
- rt->mfc_stall = NULL;
- }
- }
-
- /*
- * It is possible that an entry is being inserted without an upcall
- */
- if (nstl == 0) {
- if (mrtdebug & DEBUG_MFC)
- log(LOG_DEBUG,"add_mfc no upcall h %lu o %lx g %lx p %x\n",
- hash, (u_int32_t)ntohl(mfccp->mfcc_origin.s_addr),
- (u_int32_t)ntohl(mfccp->mfcc_mcastgrp.s_addr),
- mfccp->mfcc_parent);
-
- for (rt = mfctable[hash]; rt != NULL; rt = rt->mfc_next) {
-
- if ((rt->mfc_origin.s_addr == mfccp->mfcc_origin.s_addr) &&
- (rt->mfc_mcastgrp.s_addr == mfccp->mfcc_mcastgrp.s_addr)) {
-
- rt->mfc_origin = mfccp->mfcc_origin;
- rt->mfc_mcastgrp = mfccp->mfcc_mcastgrp;
- rt->mfc_parent = mfccp->mfcc_parent;
- for (i = 0; i < numvifs; i++)
- rt->mfc_ttls[i] = mfccp->mfcc_ttls[i];
- /* initialize pkt counters per src-grp */
- rt->mfc_pkt_cnt = 0;
- rt->mfc_byte_cnt = 0;
- rt->mfc_wrong_if = 0;
- rt->mfc_last_assert.tv_sec = rt->mfc_last_assert.tv_usec = 0;
- if (rt->mfc_expire)
- nexpire[hash]--;
- rt->mfc_expire = 0;
- }
- }
- if (rt == NULL) {
- /* no upcall, so make a new entry */
- rt = (struct mfc *) _MALLOC(sizeof(*rt), M_MRTABLE, M_NOWAIT);
- if (rt == NULL) {
- return ENOBUFS;
- }
-
- /* insert new entry at head of hash chain */
- rt->mfc_origin = mfccp->mfcc_origin;
- rt->mfc_mcastgrp = mfccp->mfcc_mcastgrp;
- rt->mfc_parent = mfccp->mfcc_parent;
- for (i = 0; i < numvifs; i++)
- rt->mfc_ttls[i] = mfccp->mfcc_ttls[i];
- /* initialize pkt counters per src-grp */
- rt->mfc_pkt_cnt = 0;
- rt->mfc_byte_cnt = 0;
- rt->mfc_wrong_if = 0;
- rt->mfc_last_assert.tv_sec = rt->mfc_last_assert.tv_usec = 0;
- rt->mfc_expire = 0;
- rt->mfc_stall = NULL;
-
- /* link into table */
- rt->mfc_next = mfctable[hash];
- mfctable[hash] = rt;
- }
- }
- return 0;
-}
-
-#if UPCALL_TIMING
-/*
- * collect delay statistics on the upcalls
- */
-static void
-collate(struct timeval *t)
-{
- u_int32_t d;
- struct timeval tp;
- u_int32_t delta;
-
- GET_TIME(tp);
-
- if (TV_LT(*t, tp))
- {
- TV_DELTA(tp, *t, delta);
-
- d = delta >> 10;
- if (d > 50)
- d = 50;
-
- ++upcall_data[d];
- }
-}
-#endif /* UPCALL_TIMING */
-
-/*
- * Delete an mfc entry
- */
-static int
-del_mfc(struct mfcctl *mfccp)
-{
- struct in_addr origin;
- struct in_addr mcastgrp;
- struct mfc *rt;
- struct mfc **nptr;
- u_int32_t hash;
-
- origin = mfccp->mfcc_origin;
- mcastgrp = mfccp->mfcc_mcastgrp;
- hash = MFCHASH(origin.s_addr, mcastgrp.s_addr);
-
- if (mrtdebug & DEBUG_MFC)
- log(LOG_DEBUG,"del_mfc orig %lx mcastgrp %lx\n",
- (u_int32_t)ntohl(origin.s_addr), (u_int32_t)ntohl(mcastgrp.s_addr));
-
- nptr = &mfctable[hash];
- while ((rt = *nptr) != NULL) {
- if (origin.s_addr == rt->mfc_origin.s_addr &&
- mcastgrp.s_addr == rt->mfc_mcastgrp.s_addr &&
- rt->mfc_stall == NULL)
- break;
-
- nptr = &rt->mfc_next;
- }
- if (rt == NULL) {
- return EADDRNOTAVAIL;
- }
-
- *nptr = rt->mfc_next;
- FREE(rt, M_MRTABLE);
-
- return 0;
-}
-
-/*
- * Send a message to mrouted on the multicast routing socket
- */
-static int
-socket_send(struct socket *s, struct mbuf *mm, struct sockaddr_in *src)
-{
- socket_lock(s, 1);
- if (s) {
- if (sbappendaddr(&s->so_rcv,
- (struct sockaddr *)src,
- mm, (struct mbuf *)0, NULL) != 0) {
- sorwakeup(s);
- socket_unlock(s, 1);
- return 0;
- }
- }
- socket_unlock(s, 1);
- m_freem(mm);
- return -1;
-}
-
-/*
- * IP multicast forwarding function. This function assumes that the packet
- * pointed to by "ip" has arrived on (or is about to be sent to) the interface
- * pointed to by "ifp", and the packet is to be relayed to other networks
- * that have members of the packet's destination IP multicast group.
- *
- * The packet is returned unscathed to the caller, unless it is
- * erroneous, in which case a non-zero return value tells the caller to
- * discard it.
- */
-
-#define IP_HDR_LEN 20 /* # bytes of fixed IP header (excluding options) */
-#define TUNNEL_LEN 12 /* # bytes of IP option for tunnel encapsulation */
-
-static int
-X_ip_mforward(struct ip *ip, struct ifnet *ifp, struct mbuf *m,
- struct ip_moptions *imo)
-{
- struct mfc *rt;
- u_char *ipoptions;
- static struct sockaddr_in k_igmpsrc = { sizeof k_igmpsrc, AF_INET,
- 0 , {0}, {0,0,0,0,0,0,0,0,} };
- static int srctun = 0;
- struct mbuf *mm;
- vifi_t vifi;
- struct vif *vifp;
-
- if (mrtdebug & DEBUG_FORWARD)
- log(LOG_DEBUG, "ip_mforward: src %lx, dst %lx, ifp %p\n",
- (u_int32_t)ntohl(ip->ip_src.s_addr), (u_int32_t)ntohl(ip->ip_dst.s_addr),
- (void *)ifp);
-
- if (ip->ip_hl < (IP_HDR_LEN + TUNNEL_LEN) >> 2 ||
- (ipoptions = (u_char *)(ip + 1))[1] != IPOPT_LSRR ) {
- /*
- * Packet arrived via a physical interface or
- * an encapsulated tunnel.
- */
- } else {
- /*
- * Packet arrived through a source-route tunnel.
- * Source-route tunnels are no longer supported.
- */
- if ((srctun++ % 1000) == 0)
- log(LOG_ERR,
- "ip_mforward: received source-routed packet from %lx\n",
- (u_int32_t)ntohl(ip->ip_src.s_addr));
-
- return 1;
- }
-
- if (imo != NULL)
- IMO_LOCK(imo);
- if ((imo) && ((vifi = imo->imo_multicast_vif) < numvifs)) {
- IMO_UNLOCK(imo);
- if (ip->ip_ttl < 255)
- ip->ip_ttl++; /* compensate for -1 in *_send routines */
- if (rsvpdebug && ip->ip_p == IPPROTO_RSVP) {
- vifp = viftable + vifi;
- printf("Sending IPPROTO_RSVP from %x to %x on vif %d (%s%s)\n",
- ntohl(ip->ip_src.s_addr), ntohl(ip->ip_dst.s_addr), vifi,
- (vifp->v_flags & VIFF_TUNNEL) ? "tunnel on " : "",
- if_name(vifp->v_ifp));
- }
- return (ip_mdq(m, ifp, NULL, vifi));
- } else if (imo != NULL) {
- IMO_UNLOCK(imo);
- }
- if (rsvpdebug && ip->ip_p == IPPROTO_RSVP) {
- printf("Warning: IPPROTO_RSVP from %x to %x without vif option\n",
- ntohl(ip->ip_src.s_addr), ntohl(ip->ip_dst.s_addr));
- if(!imo)
- printf("In fact, no options were specified at all\n");
- }
-
- /*
- * Don't forward a packet with time-to-live of zero or one,
- * or a packet destined to a local-only group.
- */
- if (ip->ip_ttl <= 1 ||
- ntohl(ip->ip_dst.s_addr) <= INADDR_MAX_LOCAL_GROUP)
- return 0;
-
- /*
- * Determine forwarding vifs from the forwarding cache table
- */
- MFCFIND(ip->ip_src.s_addr, ip->ip_dst.s_addr, rt);
-
- /* Entry exists, so forward if necessary */
- if (rt != NULL) {
- return (ip_mdq(m, ifp, rt, -1));
- } else {
- /*
- * If we don't have a route for packet's origin,
- * Make a copy of the packet &
- * send message to routing daemon
- */
-
- struct mbuf *mb0;
- struct rtdetq *rte;
- u_int32_t hash;
- int hlen = ip->ip_hl << 2;
-#if UPCALL_TIMING
- struct timeval tp;
-
- GET_TIME(tp);
-#endif
-
- mrtstat.mrts_no_route++;
- if (mrtdebug & (DEBUG_FORWARD | DEBUG_MFC))
- log(LOG_DEBUG, "ip_mforward: no rte s %lx g %lx\n",
- (u_int32_t)ntohl(ip->ip_src.s_addr),
- (u_int32_t)ntohl(ip->ip_dst.s_addr));
-
- /*
- * Allocate mbufs early so that we don't do extra work if we are
- * just going to fail anyway. Make sure to pullup the header so
- * that other people can't step on it.
- */
- rte = (struct rtdetq *) _MALLOC((sizeof *rte), M_MRTABLE, M_NOWAIT);
- if (rte == NULL) {
- return ENOBUFS;
- }
- mb0 = m_copy(m, 0, M_COPYALL);
- if (mb0 && (M_HASCL(mb0) || mb0->m_len < hlen))
- mb0 = m_pullup(mb0, hlen);
- if (mb0 == NULL) {
- FREE(rte, M_MRTABLE);
- return ENOBUFS;
- }
-
- /* is there an upcall waiting for this packet? */
- hash = MFCHASH(ip->ip_src.s_addr, ip->ip_dst.s_addr);
- for (rt = mfctable[hash]; rt; rt = rt->mfc_next) {
- if ((ip->ip_src.s_addr == rt->mfc_origin.s_addr) &&
- (ip->ip_dst.s_addr == rt->mfc_mcastgrp.s_addr) &&
- (rt->mfc_stall != NULL))
- break;
- }
-
- if (rt == NULL) {
- int i;
- struct igmpmsg *im;
-
- /* no upcall, so make a new entry */
- rt = (struct mfc *) _MALLOC(sizeof(*rt), M_MRTABLE, M_NOWAIT);
- if (rt == NULL) {
- FREE(rte, M_MRTABLE);
- m_freem(mb0);
- return ENOBUFS;
- }
- /* Make a copy of the header to send to the user level process */
- mm = m_copy(mb0, 0, hlen);
- if (mm == NULL) {
- FREE(rte, M_MRTABLE);
- m_freem(mb0);
- FREE(rt, M_MRTABLE);
- return ENOBUFS;
- }
-
- /*
- * Send message to routing daemon to install
- * a route into the kernel table
- */
- k_igmpsrc.sin_addr = ip->ip_src;
-
- im = mtod(mm, struct igmpmsg *);
- im->im_msgtype = IGMPMSG_NOCACHE;
- im->im_mbz = 0;
-
- mrtstat.mrts_upcalls++;
-
- if (socket_send(ip_mrouter, mm, &k_igmpsrc) < 0) {
- log(LOG_WARNING, "ip_mforward: ip_mrouter socket queue full\n");
- ++mrtstat.mrts_upq_sockfull;
- FREE(rte, M_MRTABLE);
- m_freem(mb0);
- FREE(rt, M_MRTABLE);
- return ENOBUFS;
- }
-
- /* insert new entry at head of hash chain */
- rt->mfc_origin.s_addr = ip->ip_src.s_addr;
- rt->mfc_mcastgrp.s_addr = ip->ip_dst.s_addr;
- rt->mfc_expire = UPCALL_EXPIRE;
- nexpire[hash]++;
- for (i = 0; i < numvifs; i++)
- rt->mfc_ttls[i] = 0;
- rt->mfc_parent = -1;
-
- /* link into table */
- rt->mfc_next = mfctable[hash];
- mfctable[hash] = rt;
- rt->mfc_stall = rte;
-
- } else {
- /* determine if q has overflowed */
- int npkts = 0;
- struct rtdetq **p;
-
- for (p = &rt->mfc_stall; *p != NULL; p = &(*p)->next)
- npkts++;
-
- if (npkts > MAX_UPQ) {
- mrtstat.mrts_upq_ovflw++;
- FREE(rte, M_MRTABLE);
- m_freem(mb0);
- return 0;
- }
-
- /* Add this entry to the end of the queue */
- *p = rte;
- }
-
- rte->m = mb0;
- rte->ifp = ifp;
-#if UPCALL_TIMING
- rte->t = tp;
-#endif
- rte->next = NULL;
-
- return 0;
- }
-}
-
-#if !defined(MROUTE_LKM) || !MROUTE_LKM
-int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *,
- struct ip_moptions *) = X_ip_mforward;
-#endif
-
-/*
- * Clean up the cache entry if upcall is not serviced
- */
-static void
-expire_upcalls(__unused void *unused)
-{
- struct rtdetq *rte;
- struct mfc *mfc, **nptr;
- int i;
-
- for (i = 0; i < CONFIG_MFCTBLSIZ; i++) {
- if (nexpire[i] == 0)
- continue;
- nptr = &mfctable[i];
- for (mfc = *nptr; mfc != NULL; mfc = *nptr) {
- /*
- * Skip real cache entries
- * Make sure it wasn't marked to not expire (shouldn't happen)
- * If it expires now
- */
- if (mfc->mfc_stall != NULL &&
- mfc->mfc_expire != 0 &&
- --mfc->mfc_expire == 0) {
- if (mrtdebug & DEBUG_EXPIRE)
- log(LOG_DEBUG, "expire_upcalls: expiring (%lx %lx)\n",
- (u_int32_t)ntohl(mfc->mfc_origin.s_addr),
- (u_int32_t)ntohl(mfc->mfc_mcastgrp.s_addr));
- /*
- * drop all the packets
- * free the mbuf with the pkt, if, timing info
- */
- for (rte = mfc->mfc_stall; rte; ) {
- struct rtdetq *n = rte->next;
-
- m_freem(rte->m);
- FREE(rte, M_MRTABLE);
- rte = n;
- }
- ++mrtstat.mrts_cache_cleanups;
- nexpire[i]--;
-
- *nptr = mfc->mfc_next;
- FREE(mfc, M_MRTABLE);
- } else {
- nptr = &mfc->mfc_next;
- }
- }
- }
- timeout(expire_upcalls, (caddr_t)NULL, EXPIRE_TIMEOUT);
-}
-
-/*
- * Packet forwarding routine once entry in the cache is made
- */
-static int
-ip_mdq(struct mbuf *m, struct ifnet *ifp, struct mfc *rt,
- vifi_t xmt_vif)
-{
- struct ip *ip = mtod(m, struct ip *);
- vifi_t vifi;
- struct vif *vifp;
- int plen = ip->ip_len;
-
-/*
- * Macro to send packet on vif. Since RSVP packets don't get counted on
- * input, they shouldn't get counted on output, so statistics keeping is
- * seperate.
- */
-#define MC_SEND(ip,vifp,m) { \
- if ((vifp)->v_flags & VIFF_TUNNEL) \
- encap_send((ip), (vifp), (m)); \
- else \
- phyint_send((ip), (vifp), (m)); \
-}
-
- /*
- * If xmt_vif is not -1, send on only the requested vif.
- *
- * (since vifi_t is u_short, -1 becomes MAXUSHORT, which > numvifs.)
- */
- if (xmt_vif < numvifs) {
- MC_SEND(ip, viftable + xmt_vif, m);
- return 1;
- }
-
- /*
- * Don't forward if it didn't arrive from the parent vif for its origin.
- */
- vifi = rt->mfc_parent;
- if ((vifi >= numvifs) || (viftable[vifi].v_ifp != ifp)) {
- /* came in the wrong interface */
- if (mrtdebug & DEBUG_FORWARD)
- log(LOG_DEBUG, "wrong if: ifp %p vifi %d vififp %p\n",
- (void *)ifp, vifi, (void *)viftable[vifi].v_ifp);
- ++mrtstat.mrts_wrong_if;
- ++rt->mfc_wrong_if;
- /*
- * If we are doing PIM assert processing, and we are forwarding
- * packets on this interface, and it is a broadcast medium
- * interface (and not a tunnel), send a message to the routing daemon.
- */
- if (pim_assert && rt->mfc_ttls[vifi] &&
- (ifp->if_flags & IFF_BROADCAST) &&
- !(viftable[vifi].v_flags & VIFF_TUNNEL)) {
- struct sockaddr_in k_igmpsrc;
- struct mbuf *mm;
- struct igmpmsg *im;
- int hlen = ip->ip_hl << 2;
- struct timeval now;
- u_int32_t delta;
-
- GET_TIME(now);
-
- TV_DELTA(rt->mfc_last_assert, now, delta);
-
- if (delta > ASSERT_MSG_TIME) {
- mm = m_copy(m, 0, hlen);
- if (mm && (M_HASCL(mm) || mm->m_len < hlen))
- mm = m_pullup(mm, hlen);
- if (mm == NULL) {
- return ENOBUFS;
- }
-
- rt->mfc_last_assert = now;
-
- im = mtod(mm, struct igmpmsg *);
- im->im_msgtype = IGMPMSG_WRONGVIF;
- im->im_mbz = 0;
- im->im_vif = vifi;
-
- k_igmpsrc.sin_addr = im->im_src;
-
- socket_send(ip_mrouter, mm, &k_igmpsrc);
- }
- }
- return 0;
- }
-
- /* If I sourced this packet, it counts as output, else it was input. */
- if (ip->ip_src.s_addr == viftable[vifi].v_lcl_addr.s_addr) {
- viftable[vifi].v_pkt_out++;
- viftable[vifi].v_bytes_out += plen;
- } else {
- viftable[vifi].v_pkt_in++;
- viftable[vifi].v_bytes_in += plen;
- }
- rt->mfc_pkt_cnt++;
- rt->mfc_byte_cnt += plen;
-
- /*
- * For each vif, decide if a copy of the packet should be forwarded.
- * Forward if:
- * - the ttl exceeds the vif's threshold
- * - there are group members downstream on interface
- */
- for (vifp = viftable, vifi = 0; vifi < numvifs; vifp++, vifi++)
- if ((rt->mfc_ttls[vifi] > 0) &&
- (ip->ip_ttl > rt->mfc_ttls[vifi])) {
- vifp->v_pkt_out++;
- vifp->v_bytes_out += plen;
- MC_SEND(ip, vifp, m);
- }
-
- return 0;
-}
-
-/*
- * check if a vif number is legal/ok. This is used by ip_output, to export
- * numvifs there,
- */
-static int
-X_legal_vif_num(int vif)
-{
- if (vif >= 0 && vif < numvifs)
- return(1);
- else
- return(0);
-}
-
-#if !defined(MROUTE_LKM) || !MROUTE_LKM
-int (*legal_vif_num)(int) = X_legal_vif_num;
-#endif
-
-/*
- * Return the local address used by this vif
- */
-static u_int32_t
-X_ip_mcast_src(int vifi)
-{
- if (vifi >= 0 && vifi < numvifs)
- return viftable[vifi].v_lcl_addr.s_addr;
- else
- return INADDR_ANY;
-}
-
-#if !defined(MROUTE_LKM) || !MROUTE_LKM
-u_int32_t (*ip_mcast_src)(int) = X_ip_mcast_src;
-#endif
-
-static void
-phyint_send(struct ip *ip, struct vif *vifp, struct mbuf *m)
-{
- struct mbuf *mb_copy;
- int hlen = ip->ip_hl << 2;
-
- /*
- * Make a new reference to the packet; make sure that
- * the IP header is actually copied, not just referenced,
- * so that ip_output() only scribbles on the copy.
- */
- mb_copy = m_copy(m, 0, M_COPYALL);
- if (mb_copy && (M_HASCL(mb_copy) || mb_copy->m_len < hlen))
- mb_copy = m_pullup(mb_copy, hlen);
- if (mb_copy == NULL)
- return;
-
- if (vifp->v_rate_limit == 0)
- tbf_send_packet(vifp, mb_copy);
- else
- tbf_control(vifp, mb_copy, mtod(mb_copy, struct ip *), ip->ip_len);
-}
-
-static void
-encap_send(struct ip *ip, struct vif *vifp, struct mbuf *m)
-{
- struct mbuf *mb_copy;
- struct ip *ip_copy;
- int i, len = ip->ip_len;
-
- /*
- * copy the old packet & pullup its IP header into the
- * new mbuf so we can modify it. Try to fill the new
- * mbuf since if we don't the ethernet driver will.
- */
- MGETHDR(mb_copy, M_DONTWAIT, MT_HEADER);
- if (mb_copy == NULL)
- return;
-#if CONFIG_MACF_NET
- mac_mbuf_label_associate_multicast_encap(m, vifp->v_ifp, mb_copy);
-#endif
- mb_copy->m_data += max_linkhdr;
- mb_copy->m_len = sizeof(multicast_encap_iphdr);
-
- if ((mb_copy->m_next = m_copy(m, 0, M_COPYALL)) == NULL) {
- m_freem(mb_copy);
- return;
- }
- i = MHLEN - M_LEADINGSPACE(mb_copy);
- if (i > len)
- i = len;
- mb_copy = m_pullup(mb_copy, i);
- if (mb_copy == NULL)
- return;
- mb_copy->m_pkthdr.len = len + sizeof(multicast_encap_iphdr);
-
- /*
- * fill in the encapsulating IP header.
- */
- ip_copy = mtod(mb_copy, struct ip *);
- *ip_copy = multicast_encap_iphdr;
- ip_copy->ip_id = ip_randomid();
- ip_copy->ip_len += len;
- ip_copy->ip_src = vifp->v_lcl_addr;
- ip_copy->ip_dst = vifp->v_rmt_addr;
-
- /*
- * turn the encapsulated IP header back into a valid one.
- */
- ip = (struct ip *)((caddr_t)ip_copy + sizeof(multicast_encap_iphdr));
- --ip->ip_ttl;
-
-#if BYTE_ORDER != BIG_ENDIAN
- HTONS(ip->ip_len);
- HTONS(ip->ip_off);
-#endif
-
- ip->ip_sum = 0;
- mb_copy->m_data += sizeof(multicast_encap_iphdr);
- ip->ip_sum = in_cksum(mb_copy, ip->ip_hl << 2);
- mb_copy->m_data -= sizeof(multicast_encap_iphdr);
-
- if (vifp->v_rate_limit == 0)
- tbf_send_packet(vifp, mb_copy);
- else
- tbf_control(vifp, mb_copy, ip, ip_copy->ip_len);
-}
-
-/*
- * De-encapsulate a packet and feed it back through ip input (this
- * routine is called whenever IP gets a packet with proto type
- * ENCAP_PROTO and a local destination address).
- */
-void
-#if MROUTE_LKM
-X_ipip_input(struct mbuf *m, int iphlen)
-#else
-ipip_input(struct mbuf *m, int iphlen)
-#endif
-{
- struct ifnet *ifp = m->m_pkthdr.rcvif;
- struct ip *ip = mtod(m, struct ip *);
- int hlen = ip->ip_hl << 2;
- struct vif *vifp;
-
- if (!have_encap_tunnel) {
- rip_input(m, iphlen);
- return;
- }
- /*
- * dump the packet if it's not to a multicast destination or if
- * we don't have an encapsulating tunnel with the source.
- * Note: This code assumes that the remote site IP address
- * uniquely identifies the tunnel (i.e., that this site has
- * at most one tunnel with the remote site).
- */
- if (! IN_MULTICAST(ntohl(((struct ip *)((char *)ip + hlen))->ip_dst.s_addr))) {
- ++mrtstat.mrts_bad_tunnel;
- m_freem(m);
- return;
- }
- if (ip->ip_src.s_addr != last_encap_src) {
- struct vif *vife;
-
- vifp = viftable;
- vife = vifp + numvifs;
- last_encap_src = ip->ip_src.s_addr;
- last_encap_vif = 0;
- for ( ; vifp < vife; ++vifp)
- if (vifp->v_rmt_addr.s_addr == ip->ip_src.s_addr) {
- if ((vifp->v_flags & (VIFF_TUNNEL|VIFF_SRCRT))
- == VIFF_TUNNEL)
- last_encap_vif = vifp;
- break;
- }
- }
- if ((vifp = last_encap_vif) == 0) {
- last_encap_src = 0;
- mrtstat.mrts_cant_tunnel++; /*XXX*/
- m_freem(m);
- if (mrtdebug)
- log(LOG_DEBUG, "ip_mforward: no tunnel with %lx\n",
- (u_int32_t)ntohl(ip->ip_src.s_addr));
- return;
- }
- ifp = vifp->v_ifp;
-
- if (hlen > IP_HDR_LEN)
- ip_stripoptions(m, (struct mbuf *) 0);
- m->m_data += IP_HDR_LEN;
- m->m_len -= IP_HDR_LEN;
- m->m_pkthdr.len -= IP_HDR_LEN;
- m->m_pkthdr.rcvif = ifp;
-
- proto_inject(PF_INET, m);
-}
-
-/*
- * Token bucket filter module
- */
-
-static void
-tbf_control(struct vif *vifp, struct mbuf *m, struct ip *ip,
- u_int32_t p_len)
-{
- struct tbf *t = vifp->v_tbf;
-
- if (p_len > MAX_BKT_SIZE) {
- /* drop if packet is too large */
- mrtstat.mrts_pkt2large++;
- m_freem(m);
- return;
- }
-
- tbf_update_tokens(vifp);
-
- /* if there are enough tokens,
- * and the queue is empty,
- * send this packet out
- */
-
- if (t->tbf_q_len == 0) {
- /* queue empty, send packet if enough tokens */
- if (p_len <= t->tbf_n_tok) {
- t->tbf_n_tok -= p_len;
- tbf_send_packet(vifp, m);
- } else {
- /* queue packet and timeout till later */
- tbf_queue(vifp, m);
- timeout(tbf_reprocess_q, (caddr_t)vifp, TBF_REPROCESS);
- }
- } else if (t->tbf_q_len < t->tbf_max_q_len) {
- /* finite queue length, so queue pkts and process queue */
- tbf_queue(vifp, m);
- tbf_process_q(vifp);
- } else {
- /* queue length too much, try to dq and queue and process */
- if (!tbf_dq_sel(vifp, ip)) {
- mrtstat.mrts_q_overflow++;
- m_freem(m);
- return;
- } else {
- tbf_queue(vifp, m);
- tbf_process_q(vifp);
- }
- }
- return;
-}
-
-/*
- * adds a packet to the queue at the interface
- */
-static void
-tbf_queue(struct vif *vifp, struct mbuf *m)
-{
- struct tbf *t = vifp->v_tbf;
-
- if (t->tbf_t == NULL) {
- /* Queue was empty */
- t->tbf_q = m;
- } else {
- /* Insert at tail */
- t->tbf_t->m_act = m;
- }
-
- /* Set new tail pointer */
- t->tbf_t = m;
-
-#if DIAGNOSTIC
- /* Make sure we didn't get fed a bogus mbuf */
- if (m->m_act)
- panic("tbf_queue: m_act");
-#endif
- m->m_act = NULL;
-
- t->tbf_q_len++;
-}
-
-
-/*
- * processes the queue at the interface
- */
-static void
-tbf_process_q(struct vif *vifp)
-{
- struct mbuf *m;
- int len;
- struct tbf *t = vifp->v_tbf;
-
- /* loop through the queue at the interface and send as many packets
- * as possible
- */
- while (t->tbf_q_len > 0) {
- m = t->tbf_q;
-
- len = mtod(m, struct ip *)->ip_len;
-
- /* determine if the packet can be sent */
- if (len <= t->tbf_n_tok) {
- /* if so,
- * reduce no of tokens, dequeue the packet,
- * send the packet.
- */
- t->tbf_n_tok -= len;
-
- t->tbf_q = m->m_act;
- if (--t->tbf_q_len == 0)
- t->tbf_t = NULL;
-
- m->m_act = NULL;
- tbf_send_packet(vifp, m);
-
- } else break;
- }
-}
-
-static void
-tbf_reprocess_q(void *xvifp)
-{
- struct vif *vifp = xvifp;
-
- if (ip_mrouter == NULL) {
- return;
- }
-
- tbf_update_tokens(vifp);
-
- tbf_process_q(vifp);
-
- if (vifp->v_tbf->tbf_q_len)
- timeout(tbf_reprocess_q, (caddr_t)vifp, TBF_REPROCESS);
-}
-
-/* function that will selectively discard a member of the queue
- * based on the precedence value and the priority
- */
-static int
-tbf_dq_sel(struct vif *vifp, struct ip *ip)
-{
- u_int p;
- struct mbuf *m, *last;
- struct mbuf **np;
- struct tbf *t = vifp->v_tbf;
-
- p = priority(vifp, ip);
-
- np = &t->tbf_q;
- last = NULL;
- while ((m = *np) != NULL) {
- if (p > priority(vifp, mtod(m, struct ip *))) {
- *np = m->m_act;
- /* If we're removing the last packet, fix the tail pointer */
- if (m == t->tbf_t)
- t->tbf_t = last;
- m_freem(m);
- /* it's impossible for the queue to be empty, but
- * we check anyway. */
- if (--t->tbf_q_len == 0)
- t->tbf_t = NULL;
- mrtstat.mrts_drop_sel++;
- return(1);
- }
- np = &m->m_act;
- last = m;
- }
- return(0);
-}
-
-static void
-tbf_send_packet(struct vif *vifp, struct mbuf *m)
-{
- int error;
- struct route ro;
-
- bzero(&ro, sizeof (ro));
- if (vifp->v_flags & VIFF_TUNNEL) {
- /* If tunnel options */
- ip_output(m, (struct mbuf *)0, &ro,
- IP_FORWARDING, (struct ip_moptions *)0, NULL);
- } else {
- struct ip_moptions *imo;
-
- imo = ip_allocmoptions(M_DONTWAIT);
- if (imo == NULL) {
- error = ENOMEM;
- goto done;
- }
-
- imo->imo_multicast_ifp = vifp->v_ifp;
- imo->imo_multicast_ttl = mtod(m, struct ip *)->ip_ttl - 1;
- imo->imo_multicast_loop = 1;
- imo->imo_multicast_vif = -1;
-
- /*
- * Re-entrancy should not be a problem here, because
- * the packets that we send out and are looped back at us
- * should get rejected because they appear to come from
- * the loopback interface, thus preventing looping.
- */
- error = ip_output(m, (struct mbuf *)0, &ro,
- IP_FORWARDING, imo, NULL);
-
- IMO_REMREF(imo);
-done:
- if (mrtdebug & DEBUG_XMIT)
- log(LOG_DEBUG, "phyint_send on vif %d err %d\n",
- vifp - viftable, error);
- }
- ROUTE_RELEASE(&ro);
-}
-
-/* determine the current time and then
- * the elapsed time (between the last time and time now)
- * in milliseconds & update the no. of tokens in the bucket
- */
-static void
-tbf_update_tokens(struct vif *vifp)
-{
- struct timeval tp;
- u_int32_t tm;
- struct tbf *t = vifp->v_tbf;
-
- GET_TIME(tp);
-
- TV_DELTA(tp, t->tbf_last_pkt_t, tm);
-
- /*
- * This formula is actually
- * "time in seconds" * "bytes/second".
- *
- * (tm / 1000000) * (v_rate_limit * 1000 * (1000/1024) / 8)
- *
- * The (1000/1024) was introduced in add_vif to optimize
- * this divide into a shift.
- */
- t->tbf_n_tok += tm * vifp->v_rate_limit / 1024 / 8;
- t->tbf_last_pkt_t = tp;
-
- if (t->tbf_n_tok > MAX_BKT_SIZE)
- t->tbf_n_tok = MAX_BKT_SIZE;
-}
-
-static int
-priority(__unused struct vif *vifp, struct ip *ip)
-{
- int prio;
-
- /* temporary hack; may add general packet classifier some day */
-
- /*
- * The UDP port space is divided up into four priority ranges:
- * [0, 16384) : unclassified - lowest priority
- * [16384, 32768) : audio - highest priority
- * [32768, 49152) : whiteboard - medium priority
- * [49152, 65536) : video - low priority
- */
- if (ip->ip_p == IPPROTO_UDP) {
- struct udphdr *udp = (struct udphdr *)(((char *)ip) + (ip->ip_hl << 2));
- switch (ntohs(udp->uh_dport) & 0xc000) {
- case 0x4000:
- prio = 70;
- break;
- case 0x8000:
- prio = 60;
- break;
- case 0xc000:
- prio = 55;
- break;
- default:
- prio = 50;
- break;
- }
- if (tbfdebug > 1)
- log(LOG_DEBUG, "port %x prio%d\n", ntohs(udp->uh_dport), prio);
- } else {
- prio = 50;
- }
- return prio;
-}
-
-/*
- * End of token bucket filter modifications
- */
-
-int
-ip_rsvp_vif_init(struct socket *so, struct sockopt *sopt)
-{
- int error, i;
-
- if (rsvpdebug)
- printf("ip_rsvp_vif_init: so_type = %d, pr_protocol = %d\n",
- so->so_type, so->so_proto->pr_protocol);
-
- if (so->so_type != SOCK_RAW || so->so_proto->pr_protocol != IPPROTO_RSVP)
- return EOPNOTSUPP;
-
- /* Check mbuf. */
- error = sooptcopyin(sopt, &i, sizeof i, sizeof i);
- if (error)
- return (error);
-
- if (rsvpdebug)
- printf("ip_rsvp_vif_init: vif = %d rsvp_on = %d\n", i, rsvp_on);
-
- /* Check vif. */
- if (!legal_vif_num(i)) {
- return EADDRNOTAVAIL;
- }
-
- /* Check if socket is available. */
- if (viftable[i].v_rsvpd != NULL) {
- return EADDRINUSE;
- }
-
- viftable[i].v_rsvpd = so;
- /* This may seem silly, but we need to be sure we don't over-increment
- * the RSVP counter, in case something slips up.
- */
- if (!viftable[i].v_rsvp_on) {
- viftable[i].v_rsvp_on = 1;
- rsvp_on++;
- }
-
- return 0;
-}
-
-int
-ip_rsvp_vif_done(struct socket *so, struct sockopt *sopt)
-{
- int error, i;
-
- if (rsvpdebug)
- printf("ip_rsvp_vif_done: so_type = %d, pr_protocol = %d\n",
- so->so_type, so->so_proto->pr_protocol);
-
- if (so->so_type != SOCK_RAW ||
- so->so_proto->pr_protocol != IPPROTO_RSVP)
- return EOPNOTSUPP;
-
- error = sooptcopyin(sopt, &i, sizeof i, sizeof i);
- if (error)
- return (error);
-
- /* Check vif. */
- if (!legal_vif_num(i)) {
- return EADDRNOTAVAIL;
- }
-
- if (rsvpdebug)
- printf("ip_rsvp_vif_done: v_rsvpd = %p so = %p\n",
- viftable[i].v_rsvpd, so);
-
- viftable[i].v_rsvpd = NULL;
- /*
- * This may seem silly, but we need to be sure we don't over-decrement
- * the RSVP counter, in case something slips up.
- */
- if (viftable[i].v_rsvp_on) {
- viftable[i].v_rsvp_on = 0;
- rsvp_on--;
- }
-
- return 0;
-}
-
-void
-ip_rsvp_force_done(struct socket *so)
-{
- int vifi;
-
- /* Don't bother if it is not the right type of socket. */
- if (so->so_type != SOCK_RAW || so->so_proto->pr_protocol != IPPROTO_RSVP)
- return;
-
- /* The socket may be attached to more than one vif...this
- * is perfectly legal.
- */
- for (vifi = 0; vifi < numvifs; vifi++) {
- if (viftable[vifi].v_rsvpd == so) {
- viftable[vifi].v_rsvpd = NULL;
- /* This may seem silly, but we need to be sure we don't
- * over-decrement the RSVP counter, in case something slips up.
- */
- if (viftable[vifi].v_rsvp_on) {
- viftable[vifi].v_rsvp_on = 0;
- rsvp_on--;
- }
- }
- }
-
- return;
-}
-
-void
-rsvp_input(struct mbuf *m, int iphlen)
-{
- int vifi;
- struct ip *ip = mtod(m, struct ip *);
- static struct sockaddr_in rsvp_src = { sizeof rsvp_src, AF_INET,
- 0 , {0}, {0,0,0,0,0,0,0,0,} };
- struct ifnet *ifp;
-
- if (rsvpdebug)
- printf("rsvp_input: rsvp_on %d\n",rsvp_on);
-
- /* Can still get packets with rsvp_on = 0 if there is a local member
- * of the group to which the RSVP packet is addressed. But in this
- * case we want to throw the packet away.
- */
- if (!rsvp_on) {
- m_freem(m);
- return;
- }
-
- if (rsvpdebug)
- printf("rsvp_input: check vifs\n");
-
-#if DIAGNOSTIC
- if (!(m->m_flags & M_PKTHDR))
- panic("rsvp_input no hdr");
-#endif
-
- ifp = m->m_pkthdr.rcvif;
- /* Find which vif the packet arrived on. */
- for (vifi = 0; vifi < numvifs; vifi++)
- if (viftable[vifi].v_ifp == ifp)
- break;
-
- if (vifi == numvifs || viftable[vifi].v_rsvpd == NULL) {
- /*
- * If the old-style non-vif-associated socket is set,
- * then use it. Otherwise, drop packet since there
- * is no specific socket for this vif.
- */
- if (ip_rsvpd != NULL) {
- if (rsvpdebug)
- printf("rsvp_input: Sending packet up old-style socket\n");
- rip_input(m, iphlen); /* xxx */
- } else {
- if (rsvpdebug && vifi == numvifs)
- printf("rsvp_input: Can't find vif for packet.\n");
- else if (rsvpdebug && viftable[vifi].v_rsvpd == NULL)
- printf("rsvp_input: No socket defined for vif %d\n",vifi);
- m_freem(m);
- }
- return;
- }
- rsvp_src.sin_addr = ip->ip_src;
-
- if (rsvpdebug && m)
- printf("rsvp_input: m->m_len = %d, sbspace() = %d\n",
- m->m_len,sbspace(&(viftable[vifi].v_rsvpd->so_rcv)));
-
- if (socket_send(viftable[vifi].v_rsvpd, m, &rsvp_src) < 0) {
- if (rsvpdebug)
- printf("rsvp_input: Failed to append to socket\n");
- } else {
- if (rsvpdebug)
- printf("rsvp_input: send packet up\n");
- }
-
-}
-
-#if MROUTE_LKM
-#include <sys/conf.h>
-#include <sys/exec.h>
-#include <sys/sysent.h>
-#include <sys/lkm.h>
-
-MOD_MISC("ip_mroute_mod")
-
-static int
-ip_mroute_mod_handle(struct lkm_table *lkmtp, int cmd)
-{
- int i;
- struct lkm_misc *args = lkmtp->private.lkm_misc;
- int err = 0;
-
- switch(cmd) {
- static int (*old_ip_mrouter_cmd)();
- static int (*old_ip_mrouter_done)();
- static int (*old_ip_mforward)();
- static int (*old_mrt_ioctl)();
- static void (*old_proto4_input)();
- static int (*old_legal_vif_num)();
-
- case LKM_E_LOAD:
- if(lkmexists(lkmtp) || ip_mrtproto)
- return(EEXIST);
- old_ip_mrouter_cmd = ip_mrouter_cmd;
- ip_mrouter_cmd = X_ip_mrouter_cmd;
- old_ip_mrouter_done = ip_mrouter_done;
- ip_mrouter_done = X_ip_mrouter_done;
- old_ip_mforward = ip_mforward;
- ip_mforward = X_ip_mforward;
- old_mrt_ioctl = mrt_ioctl;
- mrt_ioctl = X_mrt_ioctl;
- old_proto4_input = ip_protox[ENCAP_PROTO]->pr_input;
- ip_protox[ENCAP_PROTO]->pr_input = X_ipip_input;
- old_legal_vif_num = legal_vif_num;
- legal_vif_num = X_legal_vif_num;
- ip_mrtproto = IGMP_DVMRP;
-
- printf("\nIP multicast routing loaded\n");
- break;
-
- case LKM_E_UNLOAD:
- if (ip_mrouter)
- return EINVAL;
-
- ip_mrouter_cmd = old_ip_mrouter_cmd;
- ip_mrouter_done = old_ip_mrouter_done;
- ip_mforward = old_ip_mforward;
- mrt_ioctl = old_mrt_ioctl;
- ip_protox[ENCAP_PROTO]->pr_input = old_proto4_input;
- legal_vif_num = old_legal_vif_num;
- ip_mrtproto = 0;
- break;
-
- default:
- err = EINVAL;
- break;
- }
-
- return(err);
-}
-
-int
-ip_mroute_mod(struct lkm_table *lkmtp, int cmd, int ver) {
- DISPATCH(lkmtp, cmd, ver, ip_mroute_mod_handle, ip_mroute_mod_handle,
- nosys);
-}
-
-#endif /* MROUTE_LKM */
-#endif /* MROUTING */
projects / apple / xnu.git / blobdiff