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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/netstat/show.c	Lines:	0	282	0.0 %
Date:	2016-12-06	Branches:	0	250	0.0 %


/*	$OpenBSD: show.c,v 1.50 2016/07/13 08:40:46 mpi Exp $	*/
/*	$NetBSD: show.c,v 1.1 1996/11/15 18:01:41 gwr Exp $	*/

/*
 * Copyright (c) 1983, 1988, 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/socket.h>
#include <sys/sysctl.h>

#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <netmpls/mpls.h>
#include <arpa/inet.h>

#include <err.h>
#include <errno.h>
#include <netdb.h>
#include <stdio.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <limits.h>

#include "netstat.h"

char	*any_ntoa(const struct sockaddr *);
char	*link_print(struct sockaddr *);
char	*label_print(struct sockaddr *);

#define ROUNDUP(a) \
	((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))

/*
 * Definitions for showing gateway flags.
 */
struct bits {
	int	b_mask;
	char	b_val;
};
static const struct bits bits[] = {
	{ RTF_UP,	'U' },
	{ RTF_GATEWAY,	'G' },
	{ RTF_HOST,	'H' },
	{ RTF_REJECT,	'R' },
	{ RTF_BLACKHOLE, 'B' },
	{ RTF_DYNAMIC,	'D' },
	{ RTF_MODIFIED,	'M' },
	{ RTF_DONE,	'd' }, /* Completed -- for routing messages only */
	{ RTF_CLONING,	'C' },
	{ RTF_MULTICAST,'m' },
	{ RTF_LLINFO,	'L' },
	{ RTF_STATIC,	'S' },
	{ RTF_PROTO1,	'1' },
	{ RTF_PROTO2,	'2' },
	{ RTF_PROTO3,	'3' },
	{ RTF_CLONED,	'c' },
	{ RTF_MPATH,	'P' },
	{ RTF_MPLS,	'T' },
	{ RTF_LOCAL,	'l' },
	{ RTF_BROADCAST, 'b' },
	{ 0 }
};

int	 WID_DST(int);
void	 p_rtentry(struct rt_msghdr *);
void	 pr_family(int);
void	 p_sockaddr(struct sockaddr *, struct sockaddr *, int, int);
void	 p_sockaddr_mpls(struct sockaddr *, struct sockaddr *, int, int);
void	 p_flags(int, char *);
char	*routename4(in_addr_t);
char	*routename6(struct sockaddr_in6 *);

size_t
get_sysctl(const int *mib, u_int mcnt, char **buf)
{
	size_t needed;

	while (1) {
		if (sysctl(mib, mcnt, NULL, &needed, NULL, 0) == -1)
			err(1, "sysctl-estimate");
		if (needed == 0)
			break;
		if ((*buf = realloc(*buf, needed)) == NULL)
			err(1, NULL);
		if (sysctl(mib, mcnt, *buf, &needed, NULL, 0) == -1) {
			if (errno == ENOMEM)
				continue;
			err(1, "sysctl");
		}
		break;
	}

	return needed;
}

/*
 * Print routing tables.
 */
void
p_rttables(int af, u_int tableid)
{
	struct rt_msghdr *rtm;
	char *buf = NULL, *next, *lim = NULL;
	size_t needed;
	int mib[7], mcnt;
	struct sockaddr *sa;

	mib[0] = CTL_NET;
	mib[1] = PF_ROUTE;
	mib[2] = 0;
	mib[3] = af;
	mib[4] = NET_RT_DUMP;
	mib[5] = 0;
	mib[6] = tableid;
	mcnt = 7;

	needed = get_sysctl(mib, mcnt, &buf);
	lim = buf + needed;

	printf("Routing tables\n");

	if (buf) {
		for (next = buf; next < lim; next += rtm->rtm_msglen) {
			rtm = (struct rt_msghdr *)next;
			if (rtm->rtm_version != RTM_VERSION)
				continue;
			sa = (struct sockaddr *)(next + rtm->rtm_hdrlen);
			p_rtentry(rtm);
		}
	}
	free(buf);
}

/*
 * column widths; each followed by one space
 * width of destination/gateway column
 * strlen("fe80::aaaa:bbbb:cccc:dddd@gif0") == 30, strlen("/128") == 4
 */
#define	WID_GW(af)	((af) == AF_INET6 ? (nflag ? 30 : 18) : 18)

int
WID_DST(int af)
{

	if (nflag)
		switch (af) {
		case AF_MPLS:
			return 9;
		case AF_INET6:
			return 34;
		default:
			return 18;
		}
	else
		switch (af) {
		case AF_MPLS:
			return 9;
 		default:
			return 18;
		}
}

/*
 * Print header for routing table columns.
 */
void
pr_rthdr(int af, int Aflag)
{
	if (Aflag)
		printf("%-*.*s ", PLEN, PLEN, "Address");
	switch (af) {
	case PF_KEY:
		printf("%-18s %-5s %-18s %-5s %-5s %-22s\n",
		    "Source", "Port", "Destination",
		    "Port", "Proto", "SA(Address/Proto/Type/Direction)");
		break;
	case PF_MPLS:
		printf("%-9s %-9s %-6s %-18s %-6.6s %5.5s %8.8s %5.5s  %4.4s %s\n",
		    "In label", "Out label", "Op", "Gateway",
		    "Flags", "Refs", "Use", "Mtu", "Prio", "Interface");
		break;
	default:
		printf("%-*.*s %-*.*s %-6.6s %5.5s %8.8s %5.5s  %4.4s %s",
		    WID_DST(af), WID_DST(af), "Destination",
		    WID_GW(af), WID_GW(af), "Gateway",
		    "Flags", "Refs", "Use", "Mtu", "Prio", "Iface");
		if (vflag && !Aflag)
			printf(" %s", "Label");
		putchar('\n');
		break;
	}
}

static void
get_rtaddrs(int addrs, struct sockaddr *sa, struct sockaddr **rti_info)
{
	int	i;

	for (i = 0; i < RTAX_MAX; i++) {
		if (addrs & (1 << i)) {
			rti_info[i] = sa;
			sa = (struct sockaddr *)((char *)(sa) +
			    ROUNDUP(sa->sa_len));
		} else
			rti_info[i] = NULL;
	}
}

/*
 * Print a routing table entry.
 */
void
p_rtentry(struct rt_msghdr *rtm)
{
	static int	 old_af = -1;
	struct sockaddr	*sa = (struct sockaddr *)((char *)rtm + rtm->rtm_hdrlen);
	struct sockaddr	*mask, *rti_info[RTAX_MAX];
	char		 ifbuf[IF_NAMESIZE];

	if (sa->sa_family == AF_KEY)
		return;

	get_rtaddrs(rtm->rtm_addrs, sa, rti_info);

	if (Fflag && rti_info[RTAX_GATEWAY]->sa_family != sa->sa_family) {
		return;
	}
	if (old_af != sa->sa_family) {
		old_af = sa->sa_family;
		pr_family(sa->sa_family);
		pr_rthdr(sa->sa_family, 0);
	}

	mask = rti_info[RTAX_NETMASK];
	if ((sa = rti_info[RTAX_DST]) == NULL)
		return;

	p_sockaddr(sa, mask, rtm->rtm_flags, WID_DST(sa->sa_family));
	p_sockaddr_mpls(sa, rti_info[RTAX_SRC], rtm->rtm_mpls,
	    WID_DST(sa->sa_family));

	p_sockaddr(rti_info[RTAX_GATEWAY], NULL, RTF_HOST,
	    WID_GW(sa->sa_family));

	p_flags(rtm->rtm_flags, "%-6.6s ");
	printf("%5u %8llu ", rtm->rtm_rmx.rmx_refcnt,
	    rtm->rtm_rmx.rmx_pksent);
	if (rtm->rtm_rmx.rmx_mtu)
		printf("%5u ", rtm->rtm_rmx.rmx_mtu);
	else
		printf("%5s ", "-");
	putchar((rtm->rtm_rmx.rmx_locks & RTV_MTU) ? 'L' : ' ');
	printf("  %2d %-5.16s", rtm->rtm_priority,
	    if_indextoname(rtm->rtm_index, ifbuf));
	if (vflag && rti_info[RTAX_LABEL])
		printf(" %s", ((struct sockaddr_rtlabel *)
		    rti_info[RTAX_LABEL])->sr_label);
	putchar('\n');
}

/*
 * Print address family header before a section of the routing table.
 */
void
pr_family(int af)
{
	char *afname;

	switch (af) {
	case AF_INET:
		afname = "Internet";
		break;
	case AF_INET6:
		afname = "Internet6";
		break;
	case PF_KEY:
		afname = "Encap";
		break;
	case AF_MPLS:
		afname = "MPLS";
		break;
	default:
		afname = NULL;
		break;
	}
	if (afname)
		printf("\n%s:\n", afname);
	else
		printf("\nProtocol Family %d:\n", af);
}

void
p_addr(struct sockaddr *sa, struct sockaddr *mask, int flags)
{
	p_sockaddr(sa, mask, flags, WID_DST(sa->sa_family));
}

void
p_gwaddr(struct sockaddr *sa, int af)
{
	p_sockaddr(sa, 0, RTF_HOST, WID_GW(af));
}

void
p_sockaddr(struct sockaddr *sa, struct sockaddr *mask, int flags, int width)
{
	char *cp;

	switch (sa->sa_family) {
	case AF_INET6:
	    {
		struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa;
		struct in6_addr *in6 = &sa6->sin6_addr;

		/*
		 * XXX: This is a special workaround for KAME kernels.
		 * sin6_scope_id field of SA should be set in the future.
		 */
		if (IN6_IS_ADDR_LINKLOCAL(in6) ||
		    IN6_IS_ADDR_MC_LINKLOCAL(in6) ||
		    IN6_IS_ADDR_MC_INTFACELOCAL(in6)) {
			/* XXX: override is ok? */
			sa6->sin6_scope_id = (u_int32_t)ntohs(*(u_short *)
			    &in6->s6_addr[2]);
			*(u_short *)&in6->s6_addr[2] = 0;
		}
		if (flags & RTF_HOST)
			cp = routename((struct sockaddr *)sa6);
		else
			cp = netname((struct sockaddr *)sa6, mask);
		break;
	    }
	case AF_MPLS:
		return;
	default:
		if ((flags & RTF_HOST) || mask == NULL)
			cp = routename(sa);
		else
			cp = netname(sa, mask);
		break;
	}
	if (width < 0)
		printf("%s", cp);
	else {
		if (nflag)
			printf("%-*s ", width, cp);
		else
			printf("%-*.*s ", width, width, cp);
	}
}

static char line[HOST_NAME_MAX+1];
static char domain[HOST_NAME_MAX+1];

void
p_sockaddr_mpls(struct sockaddr *in, struct sockaddr *out, int flags, int width)
{
	if (in->sa_family != AF_MPLS)
		return;

	if (flags & MPLS_OP_POP || flags == MPLS_OP_LOCAL) {
		printf("%-*s ", width, label_print(in));
		printf("%-*s ", width, label_print(NULL));
	} else {
		printf("%-*s ", width, label_print(in));
		printf("%-*s ", width, label_print(out));
	}

	printf("%-6s ", mpls_op(flags));
}

void
p_flags(int f, char *format)
{
	char name[33], *flags;
	const struct bits *p = bits;

	for (flags = name; p->b_mask && flags < &name[sizeof(name) - 2]; p++)
		if (p->b_mask & f)
			*flags++ = p->b_val;
	*flags = '\0';
	printf(format, name);
}

char *
routename(struct sockaddr *sa)
{
	char *cp = NULL;
	static int first = 1;

	if (first) {
		first = 0;
		if (gethostname(domain, sizeof(domain)) == 0 &&
		    (cp = strchr(domain, '.')))
			(void)strlcpy(domain, cp + 1, sizeof(domain));
		else
			domain[0] = '\0';
		cp = NULL;
	}

	if (sa->sa_len == 0) {
		(void)strlcpy(line, "default", sizeof(line));
		return (line);
	}

	switch (sa->sa_family) {
	case AF_INET:
		return
		    (routename4(((struct sockaddr_in *)sa)->sin_addr.s_addr));

	case AF_INET6:
	    {
		struct sockaddr_in6 sin6;

		memset(&sin6, 0, sizeof(sin6));
		memcpy(&sin6, sa, sa->sa_len);
		sin6.sin6_len = sizeof(struct sockaddr_in6);
		sin6.sin6_family = AF_INET6;
		if (sa->sa_len == sizeof(struct sockaddr_in6) &&
		    (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
		     IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr) ||
		     IN6_IS_ADDR_MC_INTFACELOCAL(&sin6.sin6_addr)) &&
		    sin6.sin6_scope_id == 0) {
			sin6.sin6_scope_id =
			    ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
			sin6.sin6_addr.s6_addr[2] = 0;
			sin6.sin6_addr.s6_addr[3] = 0;
		}
		return (routename6(&sin6));
	    }

	case AF_LINK:
		return (link_print(sa));
	case AF_MPLS:
		return (label_print(sa));
	case AF_UNSPEC:
		if (sa->sa_len == sizeof(struct sockaddr_rtlabel)) {
			static char name[RTLABEL_LEN];
			struct sockaddr_rtlabel *sr;

			sr = (struct sockaddr_rtlabel *)sa;
			(void)strlcpy(name, sr->sr_label, sizeof(name));
			return (name);
		}
		/* FALLTHROUGH */
	default:
		(void)snprintf(line, sizeof(line), "(%d) %s",
		    sa->sa_family, any_ntoa(sa));
		break;
	}
	return (line);
}

char *
routename4(in_addr_t in)
{
	char		*cp = NULL;
	struct in_addr	 ina;
	struct hostent	*hp;

	if (in == INADDR_ANY)
		cp = "default";
	if (!cp && !nflag) {
		if ((hp = gethostbyaddr((char *)&in,
		    sizeof(in), AF_INET)) != NULL) {
			if ((cp = strchr(hp->h_name, '.')) &&
			    !strcmp(cp + 1, domain))
				*cp = '\0';
			cp = hp->h_name;
		}
	}
	ina.s_addr = in;
	strlcpy(line, cp ? cp : inet_ntoa(ina), sizeof(line));

	return (line);
}

char *
routename6(struct sockaddr_in6 *sin6)
{
	int	 niflags = 0;

	if (nflag)
		niflags |= NI_NUMERICHOST;
	else
		niflags |= NI_NOFQDN;

	if (getnameinfo((struct sockaddr *)sin6, sin6->sin6_len,
	    line, sizeof(line), NULL, 0, niflags) != 0)
		strncpy(line, "invalid", sizeof(line));

	return (line);
}

/*
 * Return the name of the network whose address is given.
 * The address is assumed to be that of a net or subnet, not a host.
 */
char *
netname4(in_addr_t in, in_addr_t mask)
{
	int mbits;

	in = ntohl(in);
	mask = ntohl(mask);
	mbits = mask ? 33 - ffs(mask) : 0;
	if (in == INADDR_ANY && mask == INADDR_ANY)
		strlcpy(line, "default", sizeof(line));
#define C(x)	((x) & 0xff)
	else if (mbits < 9)
		snprintf(line, sizeof(line), "%u/%d", C(in >> 24), mbits);
	else if (mbits < 17)
		snprintf(line, sizeof(line), "%u.%u/%d",
		    C(in >> 24) , C(in >> 16), mbits);
	else if (mbits < 25)
		snprintf(line, sizeof(line), "%u.%u.%u/%d",
		    C(in >> 24), C(in >> 16), C(in >> 8), mbits);
	else
		snprintf(line, sizeof(line), "%u.%u.%u.%u/%d", C(in >> 24),
		    C(in >> 16), C(in >> 8), C(in), mbits);
#undef C
	return (line);
}

char *
netname6(struct sockaddr_in6 *sa6, struct sockaddr_in6 *mask)
{
	struct sockaddr_in6 sin6;
	u_char *p;
	int masklen, final = 0, illegal = 0;
	int i, lim, flag, error;
	char hbuf[NI_MAXHOST];

	sin6 = *sa6;

	flag = 0;
	masklen = 0;
	if (mask) {
		lim = mask->sin6_len - offsetof(struct sockaddr_in6, sin6_addr);
		lim = lim < (int)sizeof(struct in6_addr) ?
		    lim : (int)sizeof(struct in6_addr);
		for (p = (u_char *)&mask->sin6_addr, i = 0; i < lim; p++) {
			if (final && *p) {
				illegal++;
				sin6.sin6_addr.s6_addr[i++] = 0x00;
				continue;
			}

			switch (*p & 0xff) {
			case 0xff:
				masklen += 8;
				break;
			case 0xfe:
				masklen += 7;
				final++;
				break;
			case 0xfc:
				masklen += 6;
				final++;
				break;
			case 0xf8:
				masklen += 5;
				final++;
				break;
			case 0xf0:
				masklen += 4;
				final++;
				break;
			case 0xe0:
				masklen += 3;
				final++;
				break;
			case 0xc0:
				masklen += 2;
				final++;
				break;
			case 0x80:
				masklen += 1;
				final++;
				break;
			case 0x00:
				final++;
				break;
			default:
				final++;
				illegal++;
				break;
			}

			if (!illegal)
				sin6.sin6_addr.s6_addr[i++] &= *p;
			else
				sin6.sin6_addr.s6_addr[i++] = 0x00;
		}
		while (i < (int)sizeof(struct in6_addr))
			sin6.sin6_addr.s6_addr[i++] = 0x00;
	} else
		masklen = 128;

	if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr))
		return ("default");

	if (illegal)
		warnx("illegal prefixlen");

	if (nflag)
		flag |= NI_NUMERICHOST;
	error = getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
	    hbuf, sizeof(hbuf), NULL, 0, flag);
	if (error)
		snprintf(hbuf, sizeof(hbuf), "invalid");

	snprintf(line, sizeof(line), "%s/%d", hbuf, masklen);
	return (line);
}

/*
 * Return the name of the network whose address is given.
 * The address is assumed to be that of a net or subnet, not a host.
 */
char *
netname(struct sockaddr *sa, struct sockaddr *mask)
{
	switch (sa->sa_family) {
	case AF_INET:
		return netname4(((struct sockaddr_in *)sa)->sin_addr.s_addr,
		    mask->sa_len == 0 ? 0 :
		    ((struct sockaddr_in *)mask)->sin_addr.s_addr);
	case AF_INET6:
		return netname6((struct sockaddr_in6 *)sa,
		    (struct sockaddr_in6 *)mask);
	case AF_LINK:
		return (link_print(sa));
	case AF_MPLS:
		return (label_print(sa));
	default:
		snprintf(line, sizeof(line), "af %d: %s",
		    sa->sa_family, any_ntoa(sa));
		break;
	}
	return (line);
}

static const char hexlist[] = "0123456789abcdef";

char *
any_ntoa(const struct sockaddr *sa)
{
	static char obuf[240];
	const char *in = sa->sa_data;
	char *out = obuf;
	int len = sa->sa_len - offsetof(struct sockaddr, sa_data);

	*out++ = 'Q';
	do {
		*out++ = hexlist[(*in >> 4) & 15];
		*out++ = hexlist[(*in++)    & 15];
		*out++ = '.';
	} while (--len > 0 && (out + 3) < &obuf[sizeof(obuf) - 1]);
	out[-1] = '\0';
	return (obuf);
}

char *
link_print(struct sockaddr *sa)
{
	struct sockaddr_dl	*sdl = (struct sockaddr_dl *)sa;
	u_char			*lla = (u_char *)sdl->sdl_data + sdl->sdl_nlen;

	if (sdl->sdl_nlen == 0 && sdl->sdl_alen == 0 &&
	    sdl->sdl_slen == 0) {
		(void)snprintf(line, sizeof(line), "link#%d", sdl->sdl_index);
		return (line);
	}
	switch (sdl->sdl_type) {
	case IFT_ETHER:
	case IFT_CARP:
		return (ether_ntoa((struct ether_addr *)lla));
	default:
		return (link_ntoa(sdl));
	}
}

char *
mpls_op(u_int32_t type)
{
	switch (type & (MPLS_OP_PUSH | MPLS_OP_POP | MPLS_OP_SWAP)) {
	case MPLS_OP_LOCAL:
		return ("LOCAL");
	case MPLS_OP_POP:
		return ("POP");
	case MPLS_OP_SWAP:
		return ("SWAP");
	case MPLS_OP_PUSH:
		return ("PUSH");
	default:
		return ("?");
	}
}

char *
label_print(struct sockaddr *sa)
{
	struct sockaddr_mpls	*smpls = (struct sockaddr_mpls *)sa;

	if (smpls)
		(void)snprintf(line, sizeof(line), "%u",
		    ntohl(smpls->smpls_label) >> MPLS_LABEL_OFFSET);
	else
		(void)snprintf(line, sizeof(line), "-");

	return (line);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: show.c,v 1.50 2016/07/13 08:40:46 mpi Exp $ */
2			/* $NetBSD: show.c,v 1.1 1996/11/15 18:01:41 gwr Exp $ */
3
4			/*
5			* Copyright (c) 1983, 1988, 1993
6			* The Regents of the University of California. All rights reserved.
7			*
8			* Redistribution and use in source and binary forms, with or without
9			* modification, are permitted provided that the following conditions
10			* are met:
11			* 1. Redistributions of source code must retain the above copyright
12			* notice, this list of conditions and the following disclaimer.
13			* 2. Redistributions in binary form must reproduce the above copyright
14			* notice, this list of conditions and the following disclaimer in the
15			* documentation and/or other materials provided with the distribution.
16			* 3. Neither the name of the University nor the names of its contributors
17			* may be used to endorse or promote products derived from this software
18			* without specific prior written permission.
19			*
20			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23			* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30			* SUCH DAMAGE.
31			*/
32
33			#include <sys/socket.h>
34			#include <sys/sysctl.h>
35
36			#include <net/if.h>
37			#include <net/if_dl.h>
38			#include <net/if_types.h>
39			#include <net/route.h>
40			#include <netinet/in.h>
41			#include <netinet/if_ether.h>
42			#include <netmpls/mpls.h>
43			#include <arpa/inet.h>
44
45			#include <err.h>
46			#include <errno.h>
47			#include <netdb.h>
48			#include <stdio.h>
49			#include <stddef.h>
50			#include <stdlib.h>
51			#include <string.h>
52			#include <unistd.h>
53			#include <limits.h>
54
55			#include "netstat.h"
56
57			char any_ntoa(const struct sockaddr );
58			char link_print(struct sockaddr );
59			char label_print(struct sockaddr );
60
61			#define ROUNDUP(a) \
62			((a) > 0 ? (1 + (((a) - 1) \| (sizeof(long) - 1))) : sizeof(long))
63			#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
64
65			/*
66			* Definitions for showing gateway flags.
67			*/
68			struct bits {
69			int b_mask;
70			char b_val;
71			};
72			static const struct bits bits[] = {
73			{ RTF_UP, 'U' },
74			{ RTF_GATEWAY, 'G' },
75			{ RTF_HOST, 'H' },
76			{ RTF_REJECT, 'R' },
77			{ RTF_BLACKHOLE, 'B' },
78			{ RTF_DYNAMIC, 'D' },
79			{ RTF_MODIFIED, 'M' },
80			{ RTF_DONE, 'd' }, /* Completed -- for routing messages only */
81			{ RTF_CLONING, 'C' },
82			{ RTF_MULTICAST,'m' },
83			{ RTF_LLINFO, 'L' },
84			{ RTF_STATIC, 'S' },
85			{ RTF_PROTO1, '1' },
86			{ RTF_PROTO2, '2' },
87			{ RTF_PROTO3, '3' },
88			{ RTF_CLONED, 'c' },
89			{ RTF_MPATH, 'P' },
90			{ RTF_MPLS, 'T' },
91			{ RTF_LOCAL, 'l' },
92			{ RTF_BROADCAST, 'b' },
93			{ 0 }
94			};
95
96			int WID_DST(int);
97			void p_rtentry(struct rt_msghdr *);
98			void pr_family(int);
99			void p_sockaddr(struct sockaddr , struct sockaddr , int, int);
100			void p_sockaddr_mpls(struct sockaddr , struct sockaddr , int, int);
101			void p_flags(int, char *);
102			char *routename4(in_addr_t);
103			char routename6(struct sockaddr_in6 );
104
105			size_t
106			get_sysctl(const int mib, u_int mcnt, char *buf)
107			{
108			size_t needed;
109
110			while (1) {
111			if (sysctl(mib, mcnt, NULL, &needed, NULL, 0) == -1)
112			err(1, "sysctl-estimate");
113			if (needed == 0)
114			break;
115			if ((buf = realloc(buf, needed)) == NULL)
116			err(1, NULL);
117			if (sysctl(mib, mcnt, *buf, &needed, NULL, 0) == -1) {
118			if (errno == ENOMEM)
119			continue;
120			err(1, "sysctl");
121			}
122			break;
123			}
124
125			return needed;
126			}
127
128			/*
129			* Print routing tables.
130			*/
131			void
132			p_rttables(int af, u_int tableid)
133			{
134			struct rt_msghdr *rtm;
135			char buf = NULL, next, *lim = NULL;
136			size_t needed;
137			int mib[7], mcnt;
138			struct sockaddr *sa;
139
140			mib[0] = CTL_NET;
141			mib[1] = PF_ROUTE;
142			mib[2] = 0;
143			mib[3] = af;
144			mib[4] = NET_RT_DUMP;
145			mib[5] = 0;
146			mib[6] = tableid;
147			mcnt = 7;
148
149			needed = get_sysctl(mib, mcnt, &buf);
150			lim = buf + needed;
151
152			printf("Routing tables\n");
153
154			if (buf) {
155			for (next = buf; next < lim; next += rtm->rtm_msglen) {
156			rtm = (struct rt_msghdr *)next;
157			if (rtm->rtm_version != RTM_VERSION)
158			continue;
159			sa = (struct sockaddr *)(next + rtm->rtm_hdrlen);
160			p_rtentry(rtm);
161			}
162			}
163			free(buf);
164			}
165
166			/*
167			* column widths; each followed by one space
168			* width of destination/gateway column
169			* strlen("fe80::aaaa:bbbb:cccc:dddd@gif0") == 30, strlen("/128") == 4
170			*/
171			#define WID_GW(af) ((af) == AF_INET6 ? (nflag ? 30 : 18) : 18)
172
173			int
174			WID_DST(int af)
175			{
176
177			if (nflag)
178			switch (af) {
179			case AF_MPLS:
180			return 9;
181			case AF_INET6:
182			return 34;
183			default:
184			return 18;
185			}
186			else
187			switch (af) {
188			case AF_MPLS:
189			return 9;
190			default:
191			return 18;
192			}
193			}
194
195			/*
196			* Print header for routing table columns.
197			*/
198			void
199			pr_rthdr(int af, int Aflag)
200			{
201			if (Aflag)
202			printf("%-.s ", PLEN, PLEN, "Address");
203			switch (af) {
204			case PF_KEY:
205			printf("%-18s %-5s %-18s %-5s %-5s %-22s\n",
206			"Source", "Port", "Destination",
207			"Port", "Proto", "SA(Address/Proto/Type/Direction)");
208			break;
209			case PF_MPLS:
210			printf("%-9s %-9s %-6s %-18s %-6.6s %5.5s %8.8s %5.5s %4.4s %s\n",
211			"In label", "Out label", "Op", "Gateway",
212			"Flags", "Refs", "Use", "Mtu", "Prio", "Interface");
213			break;
214			default:
215			printf("%-.s %-.s %-6.6s %5.5s %8.8s %5.5s %4.4s %s",
216			WID_DST(af), WID_DST(af), "Destination",
217			WID_GW(af), WID_GW(af), "Gateway",
218			"Flags", "Refs", "Use", "Mtu", "Prio", "Iface");
219			if (vflag && !Aflag)
220			printf(" %s", "Label");
221			putchar('\n');
222			break;
223			}
224			}
225
226			static void
227			get_rtaddrs(int addrs, struct sockaddr sa, struct sockaddr *rti_info)
228			{
229			int i;
230
231			for (i = 0; i < RTAX_MAX; i++) {
232			if (addrs & (1 << i)) {
233			rti_info[i] = sa;
234			sa = (struct sockaddr )((char )(sa) +
235			ROUNDUP(sa->sa_len));
236			} else
237			rti_info[i] = NULL;
238			}
239			}
240
241			/*
242			* Print a routing table entry.
243			*/
244			void
245			p_rtentry(struct rt_msghdr *rtm)
246			{
247			static int old_af = -1;
248			struct sockaddr sa = (struct sockaddr )((char *)rtm + rtm->rtm_hdrlen);
249			struct sockaddr mask, rti_info[RTAX_MAX];
250			char ifbuf[IF_NAMESIZE];
251
252			if (sa->sa_family == AF_KEY)
253			return;
254
255			get_rtaddrs(rtm->rtm_addrs, sa, rti_info);
256
257			if (Fflag && rti_info[RTAX_GATEWAY]->sa_family != sa->sa_family) {
258			return;
259			}
260			if (old_af != sa->sa_family) {
261			old_af = sa->sa_family;
262			pr_family(sa->sa_family);
263			pr_rthdr(sa->sa_family, 0);
264			}
265
266			mask = rti_info[RTAX_NETMASK];
267			if ((sa = rti_info[RTAX_DST]) == NULL)
268			return;
269
270			p_sockaddr(sa, mask, rtm->rtm_flags, WID_DST(sa->sa_family));
271			p_sockaddr_mpls(sa, rti_info[RTAX_SRC], rtm->rtm_mpls,
272			WID_DST(sa->sa_family));
273
274			p_sockaddr(rti_info[RTAX_GATEWAY], NULL, RTF_HOST,
275			WID_GW(sa->sa_family));
276
277			p_flags(rtm->rtm_flags, "%-6.6s ");
278			printf("%5u %8llu ", rtm->rtm_rmx.rmx_refcnt,
279			rtm->rtm_rmx.rmx_pksent);
280			if (rtm->rtm_rmx.rmx_mtu)
281			printf("%5u ", rtm->rtm_rmx.rmx_mtu);
282			else
283			printf("%5s ", "-");
284			putchar((rtm->rtm_rmx.rmx_locks & RTV_MTU) ? 'L' : ' ');
285			printf(" %2d %-5.16s", rtm->rtm_priority,
286			if_indextoname(rtm->rtm_index, ifbuf));
287			if (vflag && rti_info[RTAX_LABEL])
288			printf(" %s", ((struct sockaddr_rtlabel *)
289			rti_info[RTAX_LABEL])->sr_label);
290			putchar('\n');
291			}
292
293			/*
294			* Print address family header before a section of the routing table.
295			*/
296			void
297			pr_family(int af)
298			{
299			char *afname;
300
301			switch (af) {
302			case AF_INET:
303			afname = "Internet";
304			break;
305			case AF_INET6:
306			afname = "Internet6";
307			break;
308			case PF_KEY:
309			afname = "Encap";
310			break;
311			case AF_MPLS:
312			afname = "MPLS";
313			break;
314			default:
315			afname = NULL;
316			break;
317			}
318			if (afname)
319			printf("\n%s:\n", afname);
320			else
321			printf("\nProtocol Family %d:\n", af);
322			}
323
324			void
325			p_addr(struct sockaddr sa, struct sockaddr mask, int flags)
326			{
327			p_sockaddr(sa, mask, flags, WID_DST(sa->sa_family));
328			}
329
330			void
331			p_gwaddr(struct sockaddr *sa, int af)
332			{
333			p_sockaddr(sa, 0, RTF_HOST, WID_GW(af));
334			}
335
336			void
337			p_sockaddr(struct sockaddr sa, struct sockaddr mask, int flags, int width)
338			{
339			char *cp;
340
341			switch (sa->sa_family) {
342			case AF_INET6:
343			{
344			struct sockaddr_in6 sa6 = (struct sockaddr_in6 )sa;
345			struct in6_addr *in6 = &sa6->sin6_addr;
346
347			/*
348			* XXX: This is a special workaround for KAME kernels.
349			* sin6_scope_id field of SA should be set in the future.
350			*/
351			if (IN6_IS_ADDR_LINKLOCAL(in6) \|\|
352			IN6_IS_ADDR_MC_LINKLOCAL(in6) \|\|
353			IN6_IS_ADDR_MC_INTFACELOCAL(in6)) {
354			/* XXX: override is ok? */
355			sa6->sin6_scope_id = (u_int32_t)ntohs((u_short )
356			&in6->s6_addr[2]);
357			(u_short )&in6->s6_addr[2] = 0;
358			}
359			if (flags & RTF_HOST)
360			cp = routename((struct sockaddr *)sa6);
361			else
362			cp = netname((struct sockaddr *)sa6, mask);
363			break;
364			}
365			case AF_MPLS:
366			return;
367			default:
368			if ((flags & RTF_HOST) \|\| mask == NULL)
369			cp = routename(sa);
370			else
371			cp = netname(sa, mask);
372			break;
373			}
374			if (width < 0)
375			printf("%s", cp);
376			else {
377			if (nflag)
378			printf("%-*s ", width, cp);
379			else
380			printf("%-.s ", width, width, cp);
381			}
382			}
383
384			static char line[HOST_NAME_MAX+1];
385			static char domain[HOST_NAME_MAX+1];
386
387			void
388			p_sockaddr_mpls(struct sockaddr in, struct sockaddr out, int flags, int width)
389			{
390			if (in->sa_family != AF_MPLS)
391			return;
392
393			if (flags & MPLS_OP_POP \|\| flags == MPLS_OP_LOCAL) {
394			printf("%-*s ", width, label_print(in));
395			printf("%-*s ", width, label_print(NULL));
396			} else {
397			printf("%-*s ", width, label_print(in));
398			printf("%-*s ", width, label_print(out));
399			}
400
401			printf("%-6s ", mpls_op(flags));
402			}
403
404			void
405			p_flags(int f, char *format)
406			{
407			char name[33], *flags;
408			const struct bits *p = bits;
409
410			for (flags = name; p->b_mask && flags < &name[sizeof(name) - 2]; p++)
411			if (p->b_mask & f)
412			*flags++ = p->b_val;
413			*flags = '\0';
414			printf(format, name);
415			}
416
417			char *
418			routename(struct sockaddr *sa)
419			{
420			char *cp = NULL;
421			static int first = 1;
422
423			if (first) {
424			first = 0;
425			if (gethostname(domain, sizeof(domain)) == 0 &&
426			(cp = strchr(domain, '.')))
427			(void)strlcpy(domain, cp + 1, sizeof(domain));
428			else
429			domain[0] = '\0';
430			cp = NULL;
431			}
432
433			if (sa->sa_len == 0) {
434			(void)strlcpy(line, "default", sizeof(line));
435			return (line);
436			}
437
438			switch (sa->sa_family) {
439			case AF_INET:
440			return
441			(routename4(((struct sockaddr_in *)sa)->sin_addr.s_addr));
442
443			case AF_INET6:
444			{
445			struct sockaddr_in6 sin6;
446
447			memset(&sin6, 0, sizeof(sin6));
448			memcpy(&sin6, sa, sa->sa_len);
449			sin6.sin6_len = sizeof(struct sockaddr_in6);
450			sin6.sin6_family = AF_INET6;
451			if (sa->sa_len == sizeof(struct sockaddr_in6) &&
452			(IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) \|\|
453			IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr) \|\|
454			IN6_IS_ADDR_MC_INTFACELOCAL(&sin6.sin6_addr)) &&
455			sin6.sin6_scope_id == 0) {
456			sin6.sin6_scope_id =
457			ntohs((u_int16_t )&sin6.sin6_addr.s6_addr[2]);
458			sin6.sin6_addr.s6_addr[2] = 0;
459			sin6.sin6_addr.s6_addr[3] = 0;
460			}
461			return (routename6(&sin6));
462			}
463
464			case AF_LINK:
465			return (link_print(sa));
466			case AF_MPLS:
467			return (label_print(sa));
468			case AF_UNSPEC:
469			if (sa->sa_len == sizeof(struct sockaddr_rtlabel)) {
470			static char name[RTLABEL_LEN];
471			struct sockaddr_rtlabel *sr;
472
473			sr = (struct sockaddr_rtlabel *)sa;
474			(void)strlcpy(name, sr->sr_label, sizeof(name));
475			return (name);
476			}
477			/* FALLTHROUGH */
478			default:
479			(void)snprintf(line, sizeof(line), "(%d) %s",
480			sa->sa_family, any_ntoa(sa));
481			break;
482			}
483			return (line);
484			}
485
486			char *
487			routename4(in_addr_t in)
488			{
489			char *cp = NULL;
490			struct in_addr ina;
491			struct hostent *hp;
492
493			if (in == INADDR_ANY)
494			cp = "default";
495			if (!cp && !nflag) {
496			if ((hp = gethostbyaddr((char *)&in,
497			sizeof(in), AF_INET)) != NULL) {
498			if ((cp = strchr(hp->h_name, '.')) &&
499			!strcmp(cp + 1, domain))
500			*cp = '\0';
501			cp = hp->h_name;
502			}
503			}
504			ina.s_addr = in;
505			strlcpy(line, cp ? cp : inet_ntoa(ina), sizeof(line));
506
507			return (line);
508			}
509
510			char *
511			routename6(struct sockaddr_in6 *sin6)
512			{
513			int niflags = 0;
514
515			if (nflag)
516			niflags \|= NI_NUMERICHOST;
517			else
518			niflags \|= NI_NOFQDN;
519
520			if (getnameinfo((struct sockaddr *)sin6, sin6->sin6_len,
521			line, sizeof(line), NULL, 0, niflags) != 0)
522			strncpy(line, "invalid", sizeof(line));
523
524			return (line);
525			}
526
527			/*
528			* Return the name of the network whose address is given.
529			* The address is assumed to be that of a net or subnet, not a host.
530			*/
531			char *
532			netname4(in_addr_t in, in_addr_t mask)
533			{
534			int mbits;
535
536			in = ntohl(in);
537			mask = ntohl(mask);
538			mbits = mask ? 33 - ffs(mask) : 0;
539			if (in == INADDR_ANY && mask == INADDR_ANY)
540			strlcpy(line, "default", sizeof(line));
541			#define C(x) ((x) & 0xff)
542			else if (mbits < 9)
543			snprintf(line, sizeof(line), "%u/%d", C(in >> 24), mbits);
544			else if (mbits < 17)
545			snprintf(line, sizeof(line), "%u.%u/%d",
546			C(in >> 24) , C(in >> 16), mbits);
547			else if (mbits < 25)
548			snprintf(line, sizeof(line), "%u.%u.%u/%d",
549			C(in >> 24), C(in >> 16), C(in >> 8), mbits);
550			else
551			snprintf(line, sizeof(line), "%u.%u.%u.%u/%d", C(in >> 24),
552			C(in >> 16), C(in >> 8), C(in), mbits);
553			#undef C
554			return (line);
555			}
556
557			char *
558			netname6(struct sockaddr_in6 sa6, struct sockaddr_in6 mask)
559			{
560			struct sockaddr_in6 sin6;
561			u_char *p;
562			int masklen, final = 0, illegal = 0;
563			int i, lim, flag, error;
564			char hbuf[NI_MAXHOST];
565
566			sin6 = *sa6;
567
568			flag = 0;
569			masklen = 0;
570			if (mask) {
571			lim = mask->sin6_len - offsetof(struct sockaddr_in6, sin6_addr);
572			lim = lim < (int)sizeof(struct in6_addr) ?
573			lim : (int)sizeof(struct in6_addr);
574			for (p = (u_char *)&mask->sin6_addr, i = 0; i < lim; p++) {
575			if (final && *p) {
576			illegal++;
577			sin6.sin6_addr.s6_addr[i++] = 0x00;
578			continue;
579			}
580
581			switch (*p & 0xff) {
582			case 0xff:
583			masklen += 8;
584			break;
585			case 0xfe:
586			masklen += 7;
587			final++;
588			break;
589			case 0xfc:
590			masklen += 6;
591			final++;
592			break;
593			case 0xf8:
594			masklen += 5;
595			final++;
596			break;
597			case 0xf0:
598			masklen += 4;
599			final++;
600			break;
601			case 0xe0:
602			masklen += 3;
603			final++;
604			break;
605			case 0xc0:
606			masklen += 2;
607			final++;
608			break;
609			case 0x80:
610			masklen += 1;
611			final++;
612			break;
613			case 0x00:
614			final++;
615			break;
616			default:
617			final++;
618			illegal++;
619			break;
620			}
621
622			if (!illegal)
623			sin6.sin6_addr.s6_addr[i++] &= *p;
624			else
625			sin6.sin6_addr.s6_addr[i++] = 0x00;
626			}
627			while (i < (int)sizeof(struct in6_addr))
628			sin6.sin6_addr.s6_addr[i++] = 0x00;
629			} else
630			masklen = 128;
631
632			if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr))
633			return ("default");
634
635			if (illegal)
636			warnx("illegal prefixlen");
637
638			if (nflag)
639			flag \|= NI_NUMERICHOST;
640			error = getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
641			hbuf, sizeof(hbuf), NULL, 0, flag);
642			if (error)
643			snprintf(hbuf, sizeof(hbuf), "invalid");
644
645			snprintf(line, sizeof(line), "%s/%d", hbuf, masklen);
646			return (line);
647			}
648
649			/*
650			* Return the name of the network whose address is given.
651			* The address is assumed to be that of a net or subnet, not a host.
652			*/
653			char *
654			netname(struct sockaddr sa, struct sockaddr mask)
655			{
656			switch (sa->sa_family) {
657			case AF_INET:
658			return netname4(((struct sockaddr_in *)sa)->sin_addr.s_addr,
659			mask->sa_len == 0 ? 0 :
660			((struct sockaddr_in *)mask)->sin_addr.s_addr);
661			case AF_INET6:
662			return netname6((struct sockaddr_in6 *)sa,
663			(struct sockaddr_in6 *)mask);
664			case AF_LINK:
665			return (link_print(sa));
666			case AF_MPLS:
667			return (label_print(sa));
668			default:
669			snprintf(line, sizeof(line), "af %d: %s",
670			sa->sa_family, any_ntoa(sa));
671			break;
672			}
673			return (line);
674			}
675
676			static const char hexlist[] = "0123456789abcdef";
677
678			char *
679			any_ntoa(const struct sockaddr *sa)
680			{
681			static char obuf[240];
682			const char *in = sa->sa_data;
683			char *out = obuf;
684			int len = sa->sa_len - offsetof(struct sockaddr, sa_data);
685
686			*out++ = 'Q';
687			do {
688			out++ = hexlist[(in >> 4) & 15];
689			out++ = hexlist[(in++) & 15];
690			*out++ = '.';
691			} while (--len > 0 && (out + 3) < &obuf[sizeof(obuf) - 1]);
692			out[-1] = '\0';
693			return (obuf);
694			}
695
696			char *
697			link_print(struct sockaddr *sa)
698			{
699			struct sockaddr_dl sdl = (struct sockaddr_dl )sa;
700			u_char lla = (u_char )sdl->sdl_data + sdl->sdl_nlen;
701
702			if (sdl->sdl_nlen == 0 && sdl->sdl_alen == 0 &&
703			sdl->sdl_slen == 0) {
704			(void)snprintf(line, sizeof(line), "link#%d", sdl->sdl_index);
705			return (line);
706			}
707			switch (sdl->sdl_type) {
708			case IFT_ETHER:
709			case IFT_CARP:
710			return (ether_ntoa((struct ether_addr *)lla));
711			default:
712			return (link_ntoa(sdl));
713			}
714			}
715
716			char *
717			mpls_op(u_int32_t type)
718			{
719			switch (type & (MPLS_OP_PUSH \| MPLS_OP_POP \| MPLS_OP_SWAP)) {
720			case MPLS_OP_LOCAL:
721			return ("LOCAL");
722			case MPLS_OP_POP:
723			return ("POP");
724			case MPLS_OP_SWAP:
725			return ("SWAP");
726			case MPLS_OP_PUSH:
727			return ("PUSH");
728			default:
729			return ("?");
730			}
731			}
732
733			char *
734			label_print(struct sockaddr *sa)
735			{
736			struct sockaddr_mpls smpls = (struct sockaddr_mpls )sa;
737
738			if (smpls)
739			(void)snprintf(line, sizeof(line), "%u",
740			ntohl(smpls->smpls_label) >> MPLS_LABEL_OFFSET);
741			else
742			(void)snprintf(line, sizeof(line), "-");
743
744			return (line);
745			}