[PATCH 1/3] ifmcstat: Import from FreeBSD

Sebastian Huber sebastian.huber at embedded-brains.de
Thu Sep 10 07:51:42 UTC 2020


---
 freebsd/usr.sbin/ifmcstat/ifmcstat.c | 1250 ++++++++++++++++++++++++++
 freebsd/usr.sbin/ifmcstat/printb.c   |   70 ++
 2 files changed, 1320 insertions(+)
 create mode 100644 freebsd/usr.sbin/ifmcstat/ifmcstat.c
 create mode 100644 freebsd/usr.sbin/ifmcstat/printb.c

diff --git a/freebsd/usr.sbin/ifmcstat/ifmcstat.c b/freebsd/usr.sbin/ifmcstat/ifmcstat.c
new file mode 100644
index 00000000..d28e54bc
--- /dev/null
+++ b/freebsd/usr.sbin/ifmcstat/ifmcstat.c
@@ -0,0 +1,1250 @@
+#include <machine/rtems-bsd-user-space.h>
+
+/*	$KAME: ifmcstat.c,v 1.48 2006/11/15 05:13:59 itojun Exp $	*/
+
+/*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * Copyright (c) 2007-2009 Bruce Simpson.
+ * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the project nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/sysctl.h>
+#include <sys/socket.h>
+#include <sys/queue.h>
+#include <sys/tree.h>
+
+#include <net/if.h>
+#include <net/if_types.h>
+#include <net/if_dl.h>
+#include <net/route.h>
+
+#include <netinet/in.h>
+#include <netinet/in_var.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#include <netinet/igmp.h>
+#include <netinet/if_ether.h>
+#include <netinet/igmp_var.h>
+
+#ifdef INET6
+#include <netinet/icmp6.h>
+#include <netinet6/mld6_var.h>
+#endif /* INET6 */
+
+#include <arpa/inet.h>
+#include <netdb.h>
+
+#include <stddef.h>
+#include <stdarg.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <ctype.h>
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <ifaddrs.h>
+#include <sysexits.h>
+#include <unistd.h>
+
+#ifdef KVM
+/*
+ * Currently the KVM build is broken. To be fixed it requires uncovering
+ * large amount of _KERNEL code in include files, and it is also very
+ * tentative to internal kernel ABI changes. If anyone wishes to restore
+ * it, please move it out of src/usr.sbin to src/tools/tools.
+ */
+#include <kvm.h>
+#include <nlist.h>
+#endif
+
+/* XXX: This file currently assumes INET support in the base system. */
+#ifndef INET
+#define INET
+#endif
+
+extern void	printb(const char *, unsigned int, const char *);
+
+union sockunion {
+	struct sockaddr_storage	ss;
+	struct sockaddr		sa;
+	struct sockaddr_dl	sdl;
+#ifdef INET
+	struct sockaddr_in	sin;
+#endif
+#ifdef INET6
+	struct sockaddr_in6	sin6;
+#endif
+};
+typedef union sockunion sockunion_t;
+
+uint32_t	ifindex = 0;
+int		af = AF_UNSPEC;
+#ifdef WITH_KVM
+int		Kflag = 0;
+#endif
+int		vflag = 0;
+
+#define	sa_dl_equal(a1, a2)	\
+	((((struct sockaddr_dl *)(a1))->sdl_len ==			\
+	 ((struct sockaddr_dl *)(a2))->sdl_len) &&			\
+	 (bcmp(LLADDR((struct sockaddr_dl *)(a1)),			\
+	       LLADDR((struct sockaddr_dl *)(a2)),			\
+	       ((struct sockaddr_dl *)(a1))->sdl_alen) == 0))
+
+/*
+ * Most of the code in this utility is to support the use of KVM for
+ * post-mortem debugging of the multicast code.
+ */
+#ifdef WITH_KVM
+
+#ifdef INET
+static void		if_addrlist(struct ifaddr *);
+static struct in_multi *
+			in_multientry(struct in_multi *);
+#endif /* INET */
+
+#ifdef INET6
+static void		if6_addrlist(struct ifaddr *);
+static struct in6_multi *
+			in6_multientry(struct in6_multi *);
+#endif /* INET6 */
+
+static void		kread(u_long, void *, int);
+static void		ll_addrlist(struct ifaddr *);
+
+static int		ifmcstat_kvm(const char *kernel, const char *core);
+
+#define	KREAD(addr, buf, type) \
+	kread((u_long)addr, (void *)buf, sizeof(type))
+
+kvm_t	*kvmd;
+struct	nlist nl[] = {
+	{ "_ifnet", 0, 0, 0, 0, },
+	{ "", 0, 0, 0, 0, },
+};
+#define	N_IFNET	0
+
+#endif /* WITH_KVM */
+
+static int		ifmcstat_getifmaddrs(void);
+#ifdef INET
+static void		in_ifinfo(struct igmp_ifinfo *);
+static const char *	inm_mode(u_int mode);
+#endif
+#ifdef INET6
+static void		in6_ifinfo(struct mld_ifinfo *);
+static const char *	inet6_n2a(struct in6_addr *, uint32_t);
+#endif
+int			main(int, char **);
+
+static void
+usage()
+{
+
+	fprintf(stderr,
+	    "usage: ifmcstat [-i interface] [-f address family]"
+	    " [-v]"
+#ifdef WITH_KVM
+	    " [-K] [-M core] [-N system]"
+#endif
+	    "\n");
+	exit(EX_USAGE);
+}
+
+static const char *options = "i:f:vM:N:"
+#ifdef WITH_KVM
+	"K"
+#endif
+	;
+
+int
+main(int argc, char **argv)
+{
+	int c, error;
+#ifdef WITH_KVM
+	const char *kernel = NULL;
+	const char *core = NULL;
+#endif
+
+	while ((c = getopt(argc, argv, options)) != -1) {
+		switch (c) {
+		case 'i':
+			if ((ifindex = if_nametoindex(optarg)) == 0) {
+				fprintf(stderr, "%s: unknown interface\n",
+				    optarg);
+				exit(EX_NOHOST);
+			}
+			break;
+
+		case 'f':
+#ifdef INET
+			if (strcmp(optarg, "inet") == 0) {
+				af = AF_INET;
+				break;
+			}
+#endif
+#ifdef INET6
+			if (strcmp(optarg, "inet6") == 0) {
+				af = AF_INET6;
+				break;
+			}
+#endif
+			if (strcmp(optarg, "link") == 0) {
+				af = AF_LINK;
+				break;
+			}
+			fprintf(stderr, "%s: unknown address family\n", optarg);
+			exit(EX_USAGE);
+			/*NOTREACHED*/
+			break;
+
+#ifdef WITH_KVM
+		case 'K':
+			++Kflag;
+			break;
+#endif
+
+		case 'v':
+			++vflag;
+			break;
+
+#ifdef WITH_KVM
+		case 'M':
+			core = strdup(optarg);
+			break;
+
+		case 'N':
+			kernel = strdup(optarg);
+			break;
+#endif
+
+		default:
+			usage();
+			break;
+			/*NOTREACHED*/
+		}
+	}
+
+	if (af == AF_LINK && vflag)
+		usage();
+
+#ifdef WITH_KVM
+	if (Kflag)
+		error = ifmcstat_kvm(kernel, core);
+	/*
+	 * If KVM failed, and user did not explicitly specify a core file,
+	 * or force KVM backend to be disabled, try the sysctl backend.
+	 */
+	if (!Kflag || (error != 0 && (core == NULL && kernel == NULL)))
+#endif
+	error = ifmcstat_getifmaddrs();
+	if (error != 0)
+		exit(EX_OSERR);
+
+	exit(EX_OK);
+	/*NOTREACHED*/
+}
+
+#ifdef INET
+
+static void
+in_ifinfo(struct igmp_ifinfo *igi)
+{
+
+	printf("\t");
+	switch (igi->igi_version) {
+	case IGMP_VERSION_1:
+	case IGMP_VERSION_2:
+	case IGMP_VERSION_3:
+		printf("igmpv%d", igi->igi_version);
+		break;
+	default:
+		printf("igmpv?(%d)", igi->igi_version);
+		break;
+	}
+	if (igi->igi_flags)
+		printb(" flags", igi->igi_flags, "\020\1SILENT\2LOOPBACK");
+	if (igi->igi_version == IGMP_VERSION_3) {
+		printf(" rv %u qi %u qri %u uri %u",
+		    igi->igi_rv, igi->igi_qi, igi->igi_qri, igi->igi_uri);
+	}
+	if (vflag >= 2) {
+		printf(" v1timer %u v2timer %u v3timer %u",
+		    igi->igi_v1_timer, igi->igi_v2_timer, igi->igi_v3_timer);
+	}
+	printf("\n");
+}
+
+static const char *inm_modes[] = {
+	"undefined",
+	"include",
+	"exclude",
+};
+
+static const char *
+inm_mode(u_int mode)
+{
+
+	if (mode >= MCAST_UNDEFINED && mode <= MCAST_EXCLUDE)
+		return (inm_modes[mode]);
+	return (NULL);
+}
+
+#endif /* INET */
+
+#ifdef WITH_KVM
+
+static int
+ifmcstat_kvm(const char *kernel, const char *core)
+{
+	char	buf[_POSIX2_LINE_MAX], ifname[IFNAMSIZ];
+	struct	ifnet	*ifp, *nifp, ifnet;
+
+	if ((kvmd = kvm_openfiles(kernel, core, NULL, O_RDONLY, buf)) ==
+	    NULL) {
+		perror("kvm_openfiles");
+		return (-1);
+	}
+	if (kvm_nlist(kvmd, nl) < 0) {
+		perror("kvm_nlist");
+		return (-1);
+	}
+	if (nl[N_IFNET].n_value == 0) {
+		printf("symbol %s not found\n", nl[N_IFNET].n_name);
+		return (-1);
+	}
+	KREAD(nl[N_IFNET].n_value, &ifp, struct ifnet *);
+	while (ifp) {
+		KREAD(ifp, &ifnet, struct ifnet);
+		nifp = ifnet.if_link.tqe_next;
+		if (ifindex && ifindex != ifnet.if_index)
+			goto next;
+	
+		printf("%s:\n", if_indextoname(ifnet.if_index, ifname));
+#ifdef INET
+		if_addrlist(TAILQ_FIRST(&ifnet.if_addrhead));
+#endif
+#ifdef INET6
+		if6_addrlist(TAILQ_FIRST(&ifnet.if_addrhead));
+#endif
+		if (vflag)
+			ll_addrlist(TAILQ_FIRST(&ifnet.if_addrhead));
+	next:
+		ifp = nifp;
+	}
+
+	return (0);
+}
+
+static void
+kread(u_long addr, void *buf, int len)
+{
+
+	if (kvm_read(kvmd, addr, buf, len) != len) {
+		perror("kvm_read");
+		exit(EX_OSERR);
+	}
+}
+
+static void
+ll_addrlist(struct ifaddr *ifap)
+{
+	char addrbuf[NI_MAXHOST];
+	struct ifaddr ifa;
+	struct sockaddr sa;
+	struct sockaddr_dl sdl;
+	struct ifaddr *ifap0;
+
+	if (af && af != AF_LINK)
+		return;
+
+	ifap0 = ifap;
+	while (ifap) {
+		KREAD(ifap, &ifa, struct ifaddr);
+		if (ifa.ifa_addr == NULL)
+			goto nextifap;
+		KREAD(ifa.ifa_addr, &sa, struct sockaddr);
+		if (sa.sa_family != PF_LINK)
+			goto nextifap;
+		KREAD(ifa.ifa_addr, &sdl, struct sockaddr_dl);
+		if (sdl.sdl_alen == 0)
+			goto nextifap;
+		addrbuf[0] = '\0';
+		getnameinfo((struct sockaddr *)&sdl, sdl.sdl_len,
+		    addrbuf, sizeof(addrbuf), NULL, 0, NI_NUMERICHOST);
+		printf("\tlink %s\n", addrbuf);
+	nextifap:
+		ifap = ifa.ifa_link.tqe_next;
+	}
+	if (ifap0) {
+		struct ifnet ifnet;
+		struct ifmultiaddr ifm, *ifmp = 0;
+
+		KREAD(ifap0, &ifa, struct ifaddr);
+		KREAD(ifa.ifa_ifp, &ifnet, struct ifnet);
+		if (TAILQ_FIRST(&ifnet.if_multiaddrs))
+			ifmp = TAILQ_FIRST(&ifnet.if_multiaddrs);
+		while (ifmp) {
+			KREAD(ifmp, &ifm, struct ifmultiaddr);
+			if (ifm.ifma_addr == NULL)
+				goto nextmulti;
+			KREAD(ifm.ifma_addr, &sa, struct sockaddr);
+			if (sa.sa_family != AF_LINK)
+				goto nextmulti;
+			KREAD(ifm.ifma_addr, &sdl, struct sockaddr_dl);
+			addrbuf[0] = '\0';
+			getnameinfo((struct sockaddr *)&sdl,
+			    sdl.sdl_len, addrbuf, sizeof(addrbuf),
+			    NULL, 0, NI_NUMERICHOST);
+			printf("\t\tgroup %s refcnt %d\n",
+			    addrbuf, ifm.ifma_refcount);
+		nextmulti:
+			ifmp = TAILQ_NEXT(&ifm, ifma_link);
+		}
+	}
+}
+
+#ifdef INET6
+
+static void
+if6_addrlist(struct ifaddr *ifap)
+{
+	struct ifnet ifnet;
+	struct ifaddr ifa;
+	struct sockaddr sa;
+	struct in6_ifaddr if6a;
+	struct ifaddr *ifap0;
+
+	if (af && af != AF_INET6)
+		return;
+	ifap0 = ifap;
+	while (ifap) {
+		KREAD(ifap, &ifa, struct ifaddr);
+		if (ifa.ifa_addr == NULL)
+			goto nextifap;
+		KREAD(ifa.ifa_addr, &sa, struct sockaddr);
+		if (sa.sa_family != PF_INET6)
+			goto nextifap;
+		KREAD(ifap, &if6a, struct in6_ifaddr);
+		printf("\tinet6 %s\n", inet6_n2a(&if6a.ia_addr.sin6_addr,
+		    if6a.ia_addr.sin6_scope_id));
+		/*
+		 * Print per-link MLD information, if available.
+		 */
+		if (ifa.ifa_ifp != NULL) {
+			struct in6_ifextra ie;
+			struct mld_ifinfo mli;
+
+			KREAD(ifa.ifa_ifp, &ifnet, struct ifnet);
+			KREAD(ifnet.if_afdata[AF_INET6], &ie,
+			    struct in6_ifextra);
+			if (ie.mld_ifinfo != NULL) {
+				KREAD(ie.mld_ifinfo, &mli, struct mld_ifinfo);
+				in6_ifinfo(&mli);
+			}
+		}
+	nextifap:
+		ifap = ifa.ifa_link.tqe_next;
+	}
+	if (ifap0) {
+		struct ifnet ifnet;
+		struct ifmultiaddr ifm, *ifmp = 0;
+		struct sockaddr_dl sdl;
+
+		KREAD(ifap0, &ifa, struct ifaddr);
+		KREAD(ifa.ifa_ifp, &ifnet, struct ifnet);
+		if (TAILQ_FIRST(&ifnet.if_multiaddrs))
+			ifmp = TAILQ_FIRST(&ifnet.if_multiaddrs);
+		while (ifmp) {
+			KREAD(ifmp, &ifm, struct ifmultiaddr);
+			if (ifm.ifma_addr == NULL)
+				goto nextmulti;
+			KREAD(ifm.ifma_addr, &sa, struct sockaddr);
+			if (sa.sa_family != AF_INET6)
+				goto nextmulti;
+			(void)in6_multientry((struct in6_multi *)
+					     ifm.ifma_protospec);
+			if (ifm.ifma_lladdr == 0)
+				goto nextmulti;
+			KREAD(ifm.ifma_lladdr, &sdl, struct sockaddr_dl);
+			printf("\t\t\tmcast-macaddr %s refcnt %d\n",
+			       ether_ntoa((struct ether_addr *)LLADDR(&sdl)),
+			       ifm.ifma_refcount);
+		    nextmulti:
+			ifmp = TAILQ_NEXT(&ifm, ifma_link);
+		}
+	}
+}
+
+static struct in6_multi *
+in6_multientry(struct in6_multi *mc)
+{
+	struct in6_multi multi;
+
+	KREAD(mc, &multi, struct in6_multi);
+	printf("\t\tgroup %s", inet6_n2a(&multi.in6m_addr, 0));
+	printf(" refcnt %u\n", multi.in6m_refcount);
+
+	return (multi.in6m_entry.le_next);
+}
+
+#endif /* INET6 */
+
+#ifdef INET
+
+static void
+if_addrlist(struct ifaddr *ifap)
+{
+	struct ifaddr ifa;
+	struct ifnet ifnet;
+	struct sockaddr sa;
+	struct in_ifaddr ia;
+	struct ifaddr *ifap0;
+
+	if (af && af != AF_INET)
+		return;
+	ifap0 = ifap;
+	while (ifap) {
+		KREAD(ifap, &ifa, struct ifaddr);
+		if (ifa.ifa_addr == NULL)
+			goto nextifap;
+		KREAD(ifa.ifa_addr, &sa, struct sockaddr);
+		if (sa.sa_family != PF_INET)
+			goto nextifap;
+		KREAD(ifap, &ia, struct in_ifaddr);
+		printf("\tinet %s\n", inet_ntoa(ia.ia_addr.sin_addr));
+		/*
+		 * Print per-link IGMP information, if available.
+		 */
+		if (ifa.ifa_ifp != NULL) {
+			struct in_ifinfo ii;
+			struct igmp_ifinfo igi;
+
+			KREAD(ifa.ifa_ifp, &ifnet, struct ifnet);
+			KREAD(ifnet.if_afdata[AF_INET], &ii, struct in_ifinfo);
+			if (ii.ii_igmp != NULL) {
+				KREAD(ii.ii_igmp, &igi, struct igmp_ifinfo);
+				in_ifinfo(&igi);
+			}
+		}
+	nextifap:
+		ifap = ifa.ifa_link.tqe_next;
+	}
+	if (ifap0) {
+		struct ifmultiaddr ifm, *ifmp = 0;
+		struct sockaddr_dl sdl;
+
+		KREAD(ifap0, &ifa, struct ifaddr);
+		KREAD(ifa.ifa_ifp, &ifnet, struct ifnet);
+		if (TAILQ_FIRST(&ifnet.if_multiaddrs))
+			ifmp = TAILQ_FIRST(&ifnet.if_multiaddrs);
+		while (ifmp) {
+			KREAD(ifmp, &ifm, struct ifmultiaddr);
+			if (ifm.ifma_addr == NULL)
+				goto nextmulti;
+			KREAD(ifm.ifma_addr, &sa, struct sockaddr);
+			if (sa.sa_family != AF_INET)
+				goto nextmulti;
+			(void)in_multientry((struct in_multi *)
+					    ifm.ifma_protospec);
+			if (ifm.ifma_lladdr == 0)
+				goto nextmulti;
+			KREAD(ifm.ifma_lladdr, &sdl, struct sockaddr_dl);
+			printf("\t\t\tmcast-macaddr %s refcnt %d\n",
+			       ether_ntoa((struct ether_addr *)LLADDR(&sdl)),
+			       ifm.ifma_refcount);
+		    nextmulti:
+			ifmp = TAILQ_NEXT(&ifm, ifma_link);
+		}
+	}
+}
+
+static const char *inm_states[] = {
+	"not-member",
+	"silent",
+	"idle",
+	"lazy",
+	"sleeping",
+	"awakening",
+	"query-pending",
+	"sg-query-pending",
+	"leaving"
+};
+
+static const char *
+inm_state(u_int state)
+{
+
+	if (state >= IGMP_NOT_MEMBER && state <= IGMP_LEAVING_MEMBER)
+		return (inm_states[state]);
+	return (NULL);
+}
+
+#if 0
+static struct ip_msource *
+ims_min_kvm(struct in_multi *pinm)
+{
+	struct ip_msource ims0;
+	struct ip_msource *tmp, *parent;
+
+	parent = NULL;
+	tmp = RB_ROOT(&pinm->inm_srcs);
+	while (tmp) {
+		parent = tmp;
+		KREAD(tmp, &ims0, struct ip_msource);
+		tmp = RB_LEFT(&ims0, ims_link);
+	}
+	return (parent); /* kva */
+}
+
+/* XXX This routine is buggy. See RB_NEXT in sys/tree.h. */
+static struct ip_msource *
+ims_next_kvm(struct ip_msource *ims)
+{
+	struct ip_msource ims0, ims1;
+	struct ip_msource *tmp;
+
+	KREAD(ims, &ims0, struct ip_msource);
+	if (RB_RIGHT(&ims0, ims_link)) {
+		ims = RB_RIGHT(&ims0, ims_link);
+		KREAD(ims, &ims1, struct ip_msource);
+		while ((tmp = RB_LEFT(&ims1, ims_link))) {
+			KREAD(tmp, &ims0, struct ip_msource);
+			ims = RB_LEFT(&ims0, ims_link);
+		}
+	} else {
+		tmp = RB_PARENT(&ims0, ims_link);
+		if (tmp) {
+			KREAD(tmp, &ims1, struct ip_msource);
+			if (ims == RB_LEFT(&ims1, ims_link))
+				ims = tmp;
+		} else {
+			while ((tmp = RB_PARENT(&ims0, ims_link))) {
+				KREAD(tmp, &ims1, struct ip_msource);
+				if (ims == RB_RIGHT(&ims1, ims_link)) {
+					ims = tmp;
+					KREAD(ims, &ims0, struct ip_msource);
+				} else
+					break;
+			}
+			ims = RB_PARENT(&ims0, ims_link);
+		}
+	}
+	return (ims); /* kva */
+}
+
+static void
+inm_print_sources_kvm(struct in_multi *pinm)
+{
+	struct ip_msource ims0;
+	struct ip_msource *ims;
+	struct in_addr src;
+	int cnt;
+	uint8_t fmode;
+
+	cnt = 0;
+	fmode = pinm->inm_st[1].iss_fmode;
+	if (fmode == MCAST_UNDEFINED)
+		return;
+	for (ims = ims_min_kvm(pinm); ims != NULL; ims = ims_next_kvm(ims)) {
+		if (cnt == 0)
+			printf(" srcs ");
+		KREAD(ims, &ims0, struct ip_msource);
+		/* Only print sources in-mode at t1. */
+		if (fmode != ims_get_mode(pinm, ims, 1))
+			continue;
+		src.s_addr = htonl(ims0.ims_haddr);
+		printf("%s%s", (cnt++ == 0 ? "" : ","), inet_ntoa(src));
+	}
+}
+#endif
+
+static struct in_multi *
+in_multientry(struct in_multi *pinm)
+{
+	struct in_multi inm;
+	const char *state, *mode;
+
+	KREAD(pinm, &inm, struct in_multi);
+	printf("\t\tgroup %s", inet_ntoa(inm.inm_addr));
+	printf(" refcnt %u", inm.inm_refcount);
+
+	state = inm_state(inm.inm_state);
+	if (state)
+		printf(" state %s", state);
+	else
+		printf(" state (%d)", inm.inm_state);
+
+	mode = inm_mode(inm.inm_st[1].iss_fmode);
+	if (mode)
+		printf(" mode %s", mode);
+	else
+		printf(" mode (%d)", inm.inm_st[1].iss_fmode);
+
+	if (vflag >= 2) {
+		printf(" asm %u ex %u in %u rec %u",
+		    (u_int)inm.inm_st[1].iss_asm,
+		    (u_int)inm.inm_st[1].iss_ex,
+		    (u_int)inm.inm_st[1].iss_in,
+		    (u_int)inm.inm_st[1].iss_rec);
+	}
+
+#if 0
+	/* Buggy. */
+	if (vflag)
+		inm_print_sources_kvm(&inm);
+#endif
+
+	printf("\n");
+	return (NULL);
+}
+
+#endif /* INET */
+
+#endif /* WITH_KVM */
+
+#ifdef INET6
+
+static void
+in6_ifinfo(struct mld_ifinfo *mli)
+{
+
+	printf("\t");
+	switch (mli->mli_version) {
+	case MLD_VERSION_1:
+	case MLD_VERSION_2:
+		printf("mldv%d", mli->mli_version);
+		break;
+	default:
+		printf("mldv?(%d)", mli->mli_version);
+		break;
+	}
+	if (mli->mli_flags)
+		printb(" flags", mli->mli_flags, "\020\1SILENT\2USEALLOW");
+	if (mli->mli_version == MLD_VERSION_2) {
+		printf(" rv %u qi %u qri %u uri %u",
+		    mli->mli_rv, mli->mli_qi, mli->mli_qri, mli->mli_uri);
+	}
+	if (vflag >= 2) {
+		printf(" v1timer %u v2timer %u", mli->mli_v1_timer,
+		   mli->mli_v2_timer);
+	}
+	printf("\n");
+}
+
+static const char *
+inet6_n2a(struct in6_addr *p, uint32_t scope_id)
+{
+	static char buf[NI_MAXHOST];
+	struct sockaddr_in6 sin6;
+	const int niflags = NI_NUMERICHOST;
+
+	memset(&sin6, 0, sizeof(sin6));
+	sin6.sin6_family = AF_INET6;
+	sin6.sin6_len = sizeof(struct sockaddr_in6);
+	sin6.sin6_addr = *p;
+	sin6.sin6_scope_id = scope_id;
+	if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
+	    buf, sizeof(buf), NULL, 0, niflags) == 0) {
+		return (buf);
+	} else {
+		return ("(invalid)");
+	}
+}
+#endif /* INET6 */
+
+#ifdef INET
+/*
+ * Retrieve per-group source filter mode and lists via sysctl.
+ */
+static void
+inm_print_sources_sysctl(uint32_t ifindex, struct in_addr gina)
+{
+#define	MAX_SYSCTL_TRY	5
+	int mib[7];
+	int ntry = 0;
+	size_t mibsize;
+	size_t len;
+	size_t needed;
+	size_t cnt;
+	int i;
+	char *buf;
+	struct in_addr *pina;
+	uint32_t *p;
+	uint32_t fmode;
+	const char *modestr;
+
+	mibsize = nitems(mib);
+	if (sysctlnametomib("net.inet.ip.mcast.filters", mib, &mibsize) == -1) {
+		perror("sysctlnametomib");
+		return;
+	}
+
+	needed = 0;
+	mib[5] = ifindex;
+	mib[6] = gina.s_addr;	/* 32 bits wide */
+	mibsize = nitems(mib);
+	do {
+		if (sysctl(mib, mibsize, NULL, &needed, NULL, 0) == -1) {
+			perror("sysctl net.inet.ip.mcast.filters");
+			return;
+		}
+		if ((buf = malloc(needed)) == NULL) {
+			perror("malloc");
+			return;
+		}
+		if (sysctl(mib, mibsize, buf, &needed, NULL, 0) == -1) {
+			if (errno != ENOMEM || ++ntry >= MAX_SYSCTL_TRY) {
+				perror("sysctl");
+				goto out_free;
+			}
+			free(buf);
+			buf = NULL;
+		} 
+	} while (buf == NULL);
+
+	len = needed;
+	if (len < sizeof(uint32_t)) {
+		perror("sysctl");
+		goto out_free;
+	}
+
+	p = (uint32_t *)buf;
+	fmode = *p++;
+	len -= sizeof(uint32_t);
+
+	modestr = inm_mode(fmode);
+	if (modestr)
+		printf(" mode %s", modestr);
+	else
+		printf(" mode (%u)", fmode);
+
+	if (vflag == 0)
+		goto out_free;
+
+	cnt = len / sizeof(struct in_addr);
+	pina = (struct in_addr *)p;
+
+	for (i = 0; i < cnt; i++) {
+		if (i == 0)
+			printf(" srcs ");
+		fprintf(stdout, "%s%s", (i == 0 ? "" : ","),
+		    inet_ntoa(*pina++));
+		len -= sizeof(struct in_addr);
+	}
+	if (len > 0) {
+		fprintf(stderr, "warning: %u trailing bytes from %s\n",
+		    (unsigned int)len, "net.inet.ip.mcast.filters");
+	}
+
+out_free:
+	free(buf);
+#undef	MAX_SYSCTL_TRY
+}
+
+#endif /* INET */
+
+#ifdef INET6
+/*
+ * Retrieve MLD per-group source filter mode and lists via sysctl.
+ *
+ * Note: The 128-bit IPv6 group address needs to be segmented into
+ * 32-bit pieces for marshaling to sysctl. So the MIB name ends
+ * up looking like this:
+ *  a.b.c.d.e.ifindex.g[0].g[1].g[2].g[3]
+ * Assumes that pgroup originated from the kernel, so its components
+ * are already in network-byte order.
+ */
+static void
+in6m_print_sources_sysctl(uint32_t ifindex, struct in6_addr *pgroup)
+{
+#define	MAX_SYSCTL_TRY	5
+	char addrbuf[INET6_ADDRSTRLEN];
+	int mib[10];
+	int ntry = 0;
+	int *pi;
+	size_t mibsize;
+	size_t len;
+	size_t needed;
+	size_t cnt;
+	int i;
+	char *buf;
+	struct in6_addr *pina;
+	uint32_t *p;
+	uint32_t fmode;
+	const char *modestr;
+
+	mibsize = nitems(mib);
+	if (sysctlnametomib("net.inet6.ip6.mcast.filters", mib,
+	    &mibsize) == -1) {
+		perror("sysctlnametomib");
+		return;
+	}
+
+	needed = 0;
+	mib[5] = ifindex;
+	pi = (int *)pgroup;
+	for (i = 0; i < 4; i++)
+		mib[6 + i] = *pi++;
+
+	mibsize = nitems(mib);
+	do {
+		if (sysctl(mib, mibsize, NULL, &needed, NULL, 0) == -1) {
+			perror("sysctl net.inet6.ip6.mcast.filters");
+			return;
+		}
+		if ((buf = malloc(needed)) == NULL) {
+			perror("malloc");
+			return;
+		}
+		if (sysctl(mib, mibsize, buf, &needed, NULL, 0) == -1) {
+			if (errno != ENOMEM || ++ntry >= MAX_SYSCTL_TRY) {
+				perror("sysctl");
+				goto out_free;
+			}
+			free(buf);
+			buf = NULL;
+		} 
+	} while (buf == NULL);
+
+	len = needed;
+	if (len < sizeof(uint32_t)) {
+		perror("sysctl");
+		goto out_free;
+	}
+
+	p = (uint32_t *)buf;
+	fmode = *p++;
+	len -= sizeof(uint32_t);
+
+	modestr = inm_mode(fmode);
+	if (modestr)
+		printf(" mode %s", modestr);
+	else
+		printf(" mode (%u)", fmode);
+
+	if (vflag == 0)
+		goto out_free;
+
+	cnt = len / sizeof(struct in6_addr);
+	pina = (struct in6_addr *)p;
+
+	for (i = 0; i < cnt; i++) {
+		if (i == 0)
+			printf(" srcs ");
+		inet_ntop(AF_INET6, (const char *)pina++, addrbuf,
+		    INET6_ADDRSTRLEN);
+		fprintf(stdout, "%s%s", (i == 0 ? "" : ","), addrbuf);
+		len -= sizeof(struct in6_addr);
+	}
+	if (len > 0) {
+		fprintf(stderr, "warning: %u trailing bytes from %s\n",
+		    (unsigned int)len, "net.inet6.ip6.mcast.filters");
+	}
+
+out_free:
+	free(buf);
+#undef	MAX_SYSCTL_TRY
+}
+#endif /* INET6 */
+
+static int
+ifmcstat_getifmaddrs(void)
+{
+	char			 thisifname[IFNAMSIZ];
+	char			 addrbuf[NI_MAXHOST];
+	struct ifaddrs		*ifap, *ifa;
+	struct ifmaddrs		*ifmap, *ifma;
+	sockunion_t		 lastifasa;
+	sockunion_t		*psa, *pgsa, *pllsa, *pifasa;
+	char			*pcolon;
+	char			*pafname;
+	uint32_t		 lastifindex, thisifindex;
+	int			 error;
+
+	error = 0;
+	ifap = NULL;
+	ifmap = NULL;
+	lastifindex = 0;
+	thisifindex = 0;
+	lastifasa.ss.ss_family = AF_UNSPEC;
+
+	if (getifaddrs(&ifap) != 0) {
+		warn("getifmaddrs");
+		return (-1);
+	}
+
+	if (getifmaddrs(&ifmap) != 0) {
+		warn("getifmaddrs");
+		error = -1;
+		goto out;
+	}
+
+	for (ifma = ifmap; ifma; ifma = ifma->ifma_next) {
+		error = 0;
+		if (ifma->ifma_name == NULL || ifma->ifma_addr == NULL)
+			continue;
+
+		psa = (sockunion_t *)ifma->ifma_name;
+		if (psa->sa.sa_family != AF_LINK) {
+			fprintf(stderr,
+			    "WARNING: Kernel returned invalid data.\n");
+			error = -1;
+			break;
+		}
+
+		/* Filter on interface name. */
+		thisifindex = psa->sdl.sdl_index;
+		if (ifindex != 0 && thisifindex != ifindex)
+			continue;
+
+		/* Filter on address family. */
+		pgsa = (sockunion_t *)ifma->ifma_addr;
+		if (af != 0 && pgsa->sa.sa_family != af)
+			continue;
+
+		strlcpy(thisifname, link_ntoa(&psa->sdl), IFNAMSIZ);
+		pcolon = strchr(thisifname, ':');
+		if (pcolon)
+			*pcolon = '\0';
+
+		/* Only print the banner for the first ifmaddrs entry. */
+		if (lastifindex == 0 || lastifindex != thisifindex) {
+			lastifindex = thisifindex;
+			fprintf(stdout, "%s:\n", thisifname);
+		}
+
+		/*
+		 * Currently, multicast joins only take place on the
+		 * primary IPv4 address, and only on the link-local IPv6
+		 * address, as per IGMPv2/3 and MLDv1/2 semantics.
+		 * Therefore, we only look up the primary address on
+		 * the first pass.
+		 */
+		pifasa = NULL;
+		for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
+			if ((strcmp(ifa->ifa_name, thisifname) != 0) ||
+			    (ifa->ifa_addr == NULL) ||
+			    (ifa->ifa_addr->sa_family != pgsa->sa.sa_family))
+				continue;
+			/*
+			 * For AF_INET6 only the link-local address should
+			 * be returned. If built without IPv6 support,
+			 * skip this address entirely.
+			 */
+			pifasa = (sockunion_t *)ifa->ifa_addr;
+			if (pifasa->sa.sa_family == AF_INET6
+#ifdef INET6
+			    && !IN6_IS_ADDR_LINKLOCAL(&pifasa->sin6.sin6_addr)
+#endif
+			) {
+				pifasa = NULL;
+				continue;
+			}
+			break;
+		}
+		if (pifasa == NULL)
+			continue;	/* primary address not found */
+
+		if (!vflag && pifasa->sa.sa_family == AF_LINK)
+			continue;
+
+		/* Parse and print primary address, if not already printed. */
+		if (lastifasa.ss.ss_family == AF_UNSPEC ||
+		    ((lastifasa.ss.ss_family == AF_LINK &&
+		      !sa_dl_equal(&lastifasa.sa, &pifasa->sa)) ||
+		     !sa_equal(&lastifasa.sa, &pifasa->sa))) {
+
+			switch (pifasa->sa.sa_family) {
+			case AF_INET:
+				pafname = "inet";
+				break;
+			case AF_INET6:
+				pafname = "inet6";
+				break;
+			case AF_LINK:
+				pafname = "link";
+				break;
+			default:
+				pafname = "unknown";
+				break;
+			}
+
+			switch (pifasa->sa.sa_family) {
+			case AF_INET6:
+#ifdef INET6
+			{
+				const char *p =
+				    inet6_n2a(&pifasa->sin6.sin6_addr,
+					pifasa->sin6.sin6_scope_id);
+				strlcpy(addrbuf, p, sizeof(addrbuf));
+				break;
+			}
+#else
+			/* FALLTHROUGH */
+#endif
+			case AF_INET:
+			case AF_LINK:
+				error = getnameinfo(&pifasa->sa,
+				    pifasa->sa.sa_len,
+				    addrbuf, sizeof(addrbuf), NULL, 0,
+				    NI_NUMERICHOST);
+				if (error)
+					perror("getnameinfo");
+				break;
+			default:
+				addrbuf[0] = '\0';
+				break;
+			}
+
+			fprintf(stdout, "\t%s %s", pafname, addrbuf);
+#ifdef INET6
+			if (pifasa->sa.sa_family == AF_INET6 &&
+			    pifasa->sin6.sin6_scope_id)
+				fprintf(stdout, " scopeid 0x%x",
+				    pifasa->sin6.sin6_scope_id);
+#endif
+			fprintf(stdout, "\n");
+#ifdef INET
+			/*
+			 * Print per-link IGMP information, if available.
+			 */
+			if (pifasa->sa.sa_family == AF_INET) {
+				struct igmp_ifinfo igi;
+				size_t mibsize, len;
+				int mib[5];
+
+				mibsize = nitems(mib);
+				if (sysctlnametomib("net.inet.igmp.ifinfo",
+				    mib, &mibsize) == -1) {
+					perror("sysctlnametomib");
+					goto next_ifnet;
+				}
+				mib[mibsize] = thisifindex;
+				len = sizeof(struct igmp_ifinfo);
+				if (sysctl(mib, mibsize + 1, &igi, &len, NULL,
+				    0) == -1) {
+					perror("sysctl net.inet.igmp.ifinfo");
+					goto next_ifnet;
+				}
+				in_ifinfo(&igi);
+			}
+#endif /* INET */
+#ifdef INET6
+			/*
+			 * Print per-link MLD information, if available.
+			 */
+			if (pifasa->sa.sa_family == AF_INET6) {
+				struct mld_ifinfo mli;
+				size_t mibsize, len;
+				int mib[5];
+
+				mibsize = nitems(mib);
+				if (sysctlnametomib("net.inet6.mld.ifinfo",
+				    mib, &mibsize) == -1) {
+					perror("sysctlnametomib");
+					goto next_ifnet;
+				}
+				mib[mibsize] = thisifindex;
+				len = sizeof(struct mld_ifinfo);
+				if (sysctl(mib, mibsize + 1, &mli, &len, NULL,
+				    0) == -1) {
+					perror("sysctl net.inet6.mld.ifinfo");
+					goto next_ifnet;
+				}
+				in6_ifinfo(&mli);
+			}
+#endif /* INET6 */
+#if defined(INET) || defined(INET6)
+next_ifnet:
+#endif
+			lastifasa = *pifasa;
+		}
+
+		/* Print this group address. */
+#ifdef INET6
+		if (pgsa->sa.sa_family == AF_INET6) {
+			const char *p = inet6_n2a(&pgsa->sin6.sin6_addr,
+			    pgsa->sin6.sin6_scope_id);
+			strlcpy(addrbuf, p, sizeof(addrbuf));
+		} else
+#endif
+		{
+			error = getnameinfo(&pgsa->sa, pgsa->sa.sa_len,
+			    addrbuf, sizeof(addrbuf), NULL, 0, NI_NUMERICHOST);
+			if (error)
+				perror("getnameinfo");
+		}
+
+		fprintf(stdout, "\t\tgroup %s", addrbuf);
+#ifdef INET6
+		if (pgsa->sa.sa_family == AF_INET6 &&
+		    pgsa->sin6.sin6_scope_id)
+			fprintf(stdout, " scopeid 0x%x",
+			    pgsa->sin6.sin6_scope_id);
+#endif
+#ifdef INET
+		if (pgsa->sa.sa_family == AF_INET) {
+			inm_print_sources_sysctl(thisifindex,
+			    pgsa->sin.sin_addr);
+		}
+#endif
+#ifdef INET6
+		if (pgsa->sa.sa_family == AF_INET6) {
+			in6m_print_sources_sysctl(thisifindex,
+			    &pgsa->sin6.sin6_addr);
+		}
+#endif
+		fprintf(stdout, "\n");
+
+		/* Link-layer mapping, if present. */
+		pllsa = (sockunion_t *)ifma->ifma_lladdr;
+		if (pllsa != NULL) {
+			error = getnameinfo(&pllsa->sa, pllsa->sa.sa_len,
+			    addrbuf, sizeof(addrbuf), NULL, 0, NI_NUMERICHOST);
+			fprintf(stdout, "\t\t\tmcast-macaddr %s\n", addrbuf);
+		}
+	}
+out:
+	if (ifmap != NULL)
+		freeifmaddrs(ifmap);
+	if (ifap != NULL)
+		freeifaddrs(ifap);
+
+	return (error);
+}
diff --git a/freebsd/usr.sbin/ifmcstat/printb.c b/freebsd/usr.sbin/ifmcstat/printb.c
new file mode 100644
index 00000000..d94923fe
--- /dev/null
+++ b/freebsd/usr.sbin/ifmcstat/printb.c
@@ -0,0 +1,70 @@
+#include <machine/rtems-bsd-user-space.h>
+
+/*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * Copyright (c) 1983, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <assert.h>
+#include <stdio.h>
+
+/*
+ * Print a value a la the %b format of the kernel's printf
+ */
+void
+printb(const char *s, unsigned int v, const char *bits)
+{
+	int i, any = 0;
+	char c;
+
+	assert(bits != NULL);
+	if (*bits == 8)
+		printf("%s=%o", s, v);
+	else
+		printf("%s=%x", s, v);
+	bits++;
+	if (bits) {
+		putchar('<');
+		while ((i = *bits++) != '\0') {
+			if (v & (1 << (i-1))) {
+				if (any)
+					putchar(',');
+				any = 1;
+				for (; (c = *bits) > 32; bits++)
+					putchar(c);
+			} else
+				for (; *bits > 32; bits++)
+					;
+		}
+		putchar('>');
+	}
+}
-- 
2.26.2



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