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route.c
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route.c
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/*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*
* @(#)route.c 8.6 (Berkeley) 4/28/95
* $FreeBSD: src/usr.bin/netstat/route.c,v 1.41.2.14 2002/07/17 02:22:22 kbyanc Exp $
*/
#include <sys/kinfo.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netipx/ipx.h>
#include <netgraph/socket/ng_socket.h>
#include <netproto/mpls/mpls.h>
#include <sys/sysctl.h>
#include <arpa/inet.h>
#include <libutil.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <err.h>
#include <time.h>
#include <kinfo.h>
#include "netstat.h"
#define kget(p, d) (kread((u_long)(p), (char *)&(d), sizeof (d)))
/* alignment constraint for routing socket */
#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 {
u_long b_mask;
char b_val;
} bits[] = {
{ RTF_UP, 'U' },
{ RTF_GATEWAY, 'G' },
{ RTF_HOST, 'H' },
{ RTF_REJECT, 'R' },
{ RTF_DYNAMIC, 'D' },
{ RTF_MODIFIED, 'M' },
{ RTF_DONE, 'd' }, /* Completed -- for routing messages only */
{ RTF_CLONING, 'C' },
{ RTF_XRESOLVE, 'X' },
{ RTF_LLINFO, 'L' },
{ RTF_STATIC, 'S' },
{ RTF_PROTO1, '1' },
{ RTF_PROTO2, '2' },
{ RTF_WASCLONED,'W' },
{ RTF_PRCLONING,'c' },
{ RTF_PROTO3, '3' },
{ RTF_BLACKHOLE,'B' },
{ RTF_BROADCAST,'b' },
{ RTF_MPLSOPS, 'm' },
{ 0, 0 }
};
typedef union {
long dummy; /* Helps align structure. */
struct sockaddr u_sa;
u_short u_data[128];
} sa_u;
static sa_u pt_u;
int do_rtent = 0;
struct rtentry rtentry;
struct radix_node rnode;
struct radix_mask rmask;
struct radix_node_head *rt_tables[AF_MAX+1];
int NewTree = 0;
static struct sockaddr *kgetsa (struct sockaddr *);
static void size_cols (int ef, struct radix_node *rn);
static void size_cols_tree (struct radix_node *rn);
static void size_cols_rtentry (struct rtentry *rt);
static void p_tree (struct radix_node *);
static void p_rtnode (void);
static void ntreestuff (void);
static void np_rtentry (struct rt_msghdr *);
static void p_sockaddr (struct sockaddr *, struct sockaddr *, int, int);
static const char *fmt_sockaddr (struct sockaddr *sa, struct sockaddr *mask,
int flags);
static void p_flags (int, const char *);
static const char *fmt_flags(int f);
static void p_rtentry (struct rtentry *);
static u_long forgemask (u_long);
static void domask (char *, u_long, u_long);
static const char *labelops(struct rtentry *);
/*
* Print routing tables.
*/
void
routepr(u_long rtree)
{
struct radix_node_head *rnh, head;
int i;
printf("Routing tables\n");
if (Aflag == 0 && NewTree) {
ntreestuff();
} else {
if (rtree == 0) {
printf("rt_tables: symbol not in namelist\n");
return;
}
if (cpuflag >= 0) {
/*
* Severe hack.
*/
rtree += cpuflag * (AF_MAX + 1) * sizeof(void *);
}
kget(rtree, rt_tables);
for (i = 0; i <= AF_MAX; i++) {
if ((rnh = rt_tables[i]) == NULL)
continue;
kget(rnh, head);
if (i == AF_UNSPEC) {
if (Aflag && af == 0) {
printf("Netmasks:\n");
p_tree(head.rnh_treetop);
}
} else if (af == AF_UNSPEC || af == i) {
size_cols(i, head.rnh_treetop);
pr_family(i);
do_rtent = 1;
pr_rthdr(i);
p_tree(head.rnh_treetop);
}
}
}
}
/*
* Print address family header before a section of the routing table.
*/
void
pr_family(int af1)
{
const char *afname;
switch (af1) {
case AF_INET:
afname = "Internet";
break;
#ifdef INET6
case AF_INET6:
afname = "Internet6";
break;
#endif /*INET6*/
case AF_IPX:
afname = "IPX";
break;
case AF_ISO:
afname = "ISO";
break;
case AF_CCITT:
afname = "X.25";
break;
case AF_NETGRAPH:
afname = "Netgraph";
break;
case AF_MPLS:
afname = "MPLS";
break;
default:
afname = NULL;
break;
}
if (afname)
printf("\n%s:\n", afname);
else
printf("\nProtocol Family %d:\n", af1);
}
/* column widths; each followed by one space */
#ifndef INET6
#define WID_DST_DEFAULT(af) 18 /* width of destination column */
#define WID_GW_DEFAULT(af) 18 /* width of gateway column */
#define WID_IF_DEFAULT(af) (Wflag ? 8 : 6) /* width of netif column */
#else
#define WID_DST_DEFAULT(af) \
((af) == AF_INET6 ? (numeric_addr ? 33: 18) : 18)
#define WID_GW_DEFAULT(af) \
((af) == AF_INET6 ? (numeric_addr ? 29 : 18) : 18)
#define WID_IF_DEFAULT(af) ((af) == AF_INET6 ? 8 : (Wflag ? 8 :6))
#endif /*INET6*/
static int wid_dst;
static int wid_gw;
static int wid_flags;
static int wid_refs;
static int wid_use;
static int wid_mtu;
static int wid_if;
static int wid_expire;
static int wid_mplslops;
static int wid_msl;
static int wid_iwmax;
static int wid_iw;
static void
size_cols(int ef, struct radix_node *rn)
{
wid_dst = WID_DST_DEFAULT(ef);
wid_gw = WID_GW_DEFAULT(ef);
wid_flags = 6;
wid_refs = 6;
wid_use = 8;
wid_mtu = 6;
wid_if = WID_IF_DEFAULT(ef);
wid_expire = 6;
wid_mplslops = 7;
wid_msl = 7;
wid_iwmax = 5;
wid_iw = 2;
if (Wflag)
size_cols_tree(rn);
}
static void
size_cols_tree(struct radix_node *rn)
{
again:
kget(rn, rnode);
if (rnode.rn_bit < 0) {
if ((rnode.rn_flags & RNF_ROOT) == 0) {
kget(rn, rtentry);
size_cols_rtentry(&rtentry);
}
if ((rn = rnode.rn_dupedkey))
goto again;
} else {
rn = rnode.rn_right;
size_cols_tree(rnode.rn_left);
size_cols_tree(rn);
}
}
static void
size_cols_rtentry(struct rtentry *rt)
{
static struct ifnet ifnet, *lastif;
struct rtentry parent;
static char buffer[100];
const char *bp;
struct sockaddr *sa;
sa_u addr, mask;
int len;
/*
* Don't print protocol-cloned routes unless -a.
*/
if (rt->rt_flags & RTF_WASCLONED && !aflag) {
kget(rt->rt_parent, parent);
if (parent.rt_flags & RTF_PRCLONING)
return;
}
bzero(&addr, sizeof(addr));
if ((sa = kgetsa(rt_key(rt))))
bcopy(sa, &addr, sa->sa_len);
bzero(&mask, sizeof(mask));
if (rt_mask(rt) && (sa = kgetsa(rt_mask(rt))))
bcopy(sa, &mask, sa->sa_len);
bp = fmt_sockaddr(&addr.u_sa, &mask.u_sa, rt->rt_flags);
len = strlen(bp);
wid_dst = MAX(len, wid_dst);
bp = fmt_sockaddr(kgetsa(rt->rt_gateway), NULL, RTF_HOST);
len = strlen(bp);
wid_gw = MAX(len, wid_gw);
bp = fmt_flags(rt->rt_flags);
len = strlen(bp);
wid_flags = MAX(len, wid_flags);
if (addr.u_sa.sa_family == AF_INET || Wflag) {
len = snprintf(buffer, sizeof(buffer), "%ld", rt->rt_refcnt);
wid_refs = MAX(len, wid_refs);
len = snprintf(buffer, sizeof(buffer), "%lu", rt->rt_use);
wid_use = MAX(len, wid_use);
if (Wflag && rt->rt_rmx.rmx_mtu != 0) {
len = snprintf(buffer, sizeof(buffer),
"%lu", rt->rt_rmx.rmx_mtu);
wid_mtu = MAX(len, wid_mtu);
}
}
if (rt->rt_ifp) {
if (rt->rt_ifp != lastif) {
kget(rt->rt_ifp, ifnet);
lastif = rt->rt_ifp;
len = strlen(ifnet.if_xname);
wid_if = MAX(len, wid_if);
}
if (rt->rt_rmx.rmx_expire) {
time_t expire_time;
if ((expire_time =
rt->rt_rmx.rmx_expire - time(NULL)) > 0) {
snprintf(buffer, sizeof(buffer), "%d",
(int)expire_time);
wid_expire = MAX(len, wid_expire);
}
}
}
if (Wflag) {
if (rt->rt_shim[0] != NULL) {
len = strlen(labelops(rt));
wid_mplslops = MAX(len, wid_mplslops);
}
if (rt->rt_rmx.rmx_msl) {
len = snprintf(buffer, sizeof(buffer),
"%lu", rt->rt_rmx.rmx_msl);
wid_msl = MAX(len, wid_msl);
}
if (rt->rt_rmx.rmx_iwmaxsegs) {
len = snprintf(buffer, sizeof(buffer),
"%lu", rt->rt_rmx.rmx_iwmaxsegs);
wid_iwmax = MAX(len, wid_iwmax);
}
if (rt->rt_rmx.rmx_iwcapsegs) {
len = snprintf(buffer, sizeof(buffer),
"%lu", rt->rt_rmx.rmx_iwcapsegs);
wid_iw = MAX(len, wid_iw);
}
}
}
/*
* Print header for routing table columns.
*/
void
pr_rthdr(int af1)
{
if (Aflag)
printf("%-8.8s ","Address");
if (af1 == AF_INET || Wflag) {
if (Wflag) {
printf("%-*.*s %-*.*s %-*.*s %*.*s %*.*s %*.*s %*.*s "
"%*s %-*s%*s %*s %*s\n",
wid_dst, wid_dst, "Destination",
wid_gw, wid_gw, "Gateway",
wid_flags, wid_flags, "Flags",
wid_refs, wid_refs, "Refs",
wid_use, wid_use, "Use",
wid_mtu, wid_mtu, "Mtu",
wid_if, wid_if, "Netif",
wid_expire, "Expire",
wid_mplslops, "Labelops",
wid_msl, "Msl",
wid_iwmax, "IWmax",
wid_iw, "IW");
} else {
printf("%-*.*s %-*.*s %-*.*s %*.*s %*.*s %*.*s %*s\n",
wid_dst, wid_dst, "Destination",
wid_gw, wid_gw, "Gateway",
wid_flags, wid_flags, "Flags",
wid_refs, wid_refs, "Refs",
wid_use, wid_use, "Use",
wid_if, wid_if, "Netif",
wid_expire, "Expire");
}
} else {
printf("%-*.*s %-*.*s %-*.*s %*.*s %*s\n",
wid_dst, wid_dst, "Destination",
wid_gw, wid_gw, "Gateway",
wid_flags, wid_flags, "Flags",
wid_if, wid_if, "Netif",
wid_expire, "Expire");
}
}
static struct sockaddr *
kgetsa(struct sockaddr *dst)
{
kget(dst, pt_u.u_sa);
if (pt_u.u_sa.sa_len > sizeof (pt_u.u_sa))
kread((u_long)dst, (char *)pt_u.u_data, pt_u.u_sa.sa_len);
return (&pt_u.u_sa);
}
static void
p_tree(struct radix_node *rn)
{
again:
kget(rn, rnode);
if (rnode.rn_bit < 0) {
if (Aflag)
printf("%-8.8lx ", (u_long)rn);
if (rnode.rn_flags & RNF_ROOT) {
if (Aflag)
printf("(root node)%s",
rnode.rn_dupedkey ? " =>\n" : "\n");
} else if (do_rtent) {
kget(rn, rtentry);
p_rtentry(&rtentry);
if (Aflag)
p_rtnode();
} else {
p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_key),
NULL, 0, 44);
putchar('\n');
}
if ((rn = rnode.rn_dupedkey))
goto again;
} else {
if (Aflag && do_rtent) {
printf("%-8.8lx ", (u_long)rn);
p_rtnode();
}
rn = rnode.rn_right;
p_tree(rnode.rn_left);
p_tree(rn);
}
}
char nbuf[20];
static void
p_rtnode(void)
{
struct radix_mask *rm = rnode.rn_mklist;
if (rnode.rn_bit < 0) {
if (rnode.rn_mask) {
printf("\t mask ");
p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_mask),
NULL, 0, -1);
} else if (rm == NULL)
return;
} else {
sprintf(nbuf, "(%d)", rnode.rn_bit);
printf("%6.6s %8.8lx : %8.8lx", nbuf, (u_long)rnode.rn_left, (u_long)rnode.rn_right);
}
while (rm) {
kget(rm, rmask);
sprintf(nbuf, " %d refs, ", rmask.rm_refs);
printf(" mk = %8.8lx {(%d),%s",
(u_long)rm, -1 - rmask.rm_bit, rmask.rm_refs ? nbuf : " ");
if (rmask.rm_flags & RNF_NORMAL) {
struct radix_node rnode_aux;
printf(" <normal>, ");
kget(rmask.rm_leaf, rnode_aux);
p_sockaddr(kgetsa((struct sockaddr *)rnode_aux.rn_mask),
NULL, 0, -1);
} else
p_sockaddr(kgetsa((struct sockaddr *)rmask.rm_mask),
NULL, 0, -1);
putchar('}');
if ((rm = rmask.rm_next))
printf(" ->");
}
putchar('\n');
}
static void
ntreestuff(void)
{
size_t needed;
int mib[7];
int miblen;
char *buf, *next, *lim;
struct rt_msghdr *rtm;
mib[0] = CTL_NET;
mib[1] = PF_ROUTE;
mib[2] = 0;
mib[3] = 0;
mib[4] = NET_RT_DUMP;
mib[5] = 0;
if (cpuflag >= 0) {
mib[6] = cpuflag;
miblen = 7;
} else {
miblen = 6;
}
if (sysctl(mib, miblen, NULL, &needed, NULL, 0) < 0) {
err(1, "sysctl: net.route.0.0.dump estimate");
}
if ((buf = malloc(needed)) == NULL) {
err(2, "malloc(%lu)", (unsigned long)needed);
}
if (sysctl(mib, miblen, buf, &needed, NULL, 0) < 0) {
err(1, "sysctl: net.route.0.0.dump");
}
lim = buf + needed;
for (next = buf; next < lim; next += rtm->rtm_msglen) {
rtm = (struct rt_msghdr *)next;
np_rtentry(rtm);
}
}
static void
np_rtentry(struct rt_msghdr *rtm)
{
struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
#ifdef notdef
static int masks_done, banner_printed;
#endif
static int old_af;
int af1 = 0, interesting = RTF_UP | RTF_GATEWAY | RTF_HOST;
#ifdef notdef
/* for the moment, netmasks are skipped over */
if (!banner_printed) {
printf("Netmasks:\n");
banner_printed = 1;
}
if (masks_done == 0) {
if (rtm->rtm_addrs != RTA_DST ) {
masks_done = 1;
af1 = sa->sa_family;
}
} else
#endif
af1 = sa->sa_family;
if (af1 != old_af) {
pr_family(af1);
old_af = af1;
}
if (rtm->rtm_addrs == RTA_DST)
p_sockaddr(sa, NULL, 0, 36);
else {
p_sockaddr(sa, NULL, rtm->rtm_flags, 16);
sa = (struct sockaddr *)(ROUNDUP(sa->sa_len) + (char *)sa);
p_sockaddr(sa, NULL, 0, 18);
}
p_flags(rtm->rtm_flags & interesting, "%-6.6s ");
putchar('\n');
}
static void
p_sockaddr(struct sockaddr *sa, struct sockaddr *mask, int flags, int width)
{
const char *cp;
cp = fmt_sockaddr(sa, mask, flags);
if (width < 0 )
printf("%s ", cp);
else {
if (numeric_addr)
printf("%-*s ", width, cp);
else
printf("%-*.*s ", width, width, cp);
}
}
static const char *
fmt_sockaddr(struct sockaddr *sa, struct sockaddr *mask, int flags)
{
static char workbuf[128];
const char *cp = workbuf;
switch(sa->sa_family) {
case AF_INET:
{
struct sockaddr_in *sin = (struct sockaddr_in *)sa;
if ((sin->sin_addr.s_addr == INADDR_ANY) &&
mask &&
ntohl(((struct sockaddr_in *)mask)->sin_addr.s_addr)
==0L)
cp = "default" ;
else if (flags & RTF_HOST)
cp = routename(sin->sin_addr.s_addr);
else if (mask)
cp = netname(sin->sin_addr.s_addr,
ntohl(((struct sockaddr_in *)mask)
->sin_addr.s_addr));
else
cp = netname(sin->sin_addr.s_addr, 0L);
break;
}
#ifdef INET6
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)) {
/* 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 = routename6(sa6);
else if (mask)
cp = netname6(sa6,
&((struct sockaddr_in6 *)mask)->sin6_addr);
else {
cp = netname6(sa6, NULL);
}
break;
}
#endif /*INET6*/
case AF_IPX:
{
struct ipx_addr work = ((struct sockaddr_ipx *)sa)->sipx_addr;
if (ipx_nullnet(satoipx_addr(work)))
cp = "default";
else
cp = ipx_print(sa);
break;
}
case AF_NETGRAPH:
{
printf("%s", ((struct sockaddr_ng *)sa)->sg_data);
break;
}
case AF_LINK:
{
struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa;
if (sdl->sdl_nlen == 0 && sdl->sdl_alen == 0 &&
sdl->sdl_slen == 0)
(void) sprintf(workbuf, "link#%d", sdl->sdl_index);
else
switch (sdl->sdl_type) {
case IFT_ETHER:
case IFT_L2VLAN:
case IFT_CARP:
if (sdl->sdl_alen == ETHER_ADDR_LEN) {
cp = ether_ntoa((struct ether_addr *)
(sdl->sdl_data + sdl->sdl_nlen));
break;
}
/* FALLTHROUGH */
default:
cp = link_ntoa(sdl);
break;
}
break;
}
case AF_MPLS:
{
struct sockaddr_mpls *smpls = (struct sockaddr_mpls *)sa;
(void) sprintf(workbuf, "%d", ntohl(smpls->smpls_label));
break;
}
default:
{
u_char *s = (u_char *)sa->sa_data, *slim;
char *cq, *cqlim;
cq = workbuf;
slim = sa->sa_len + (u_char *) sa;
cqlim = cq + sizeof(workbuf) - 6;
cq += sprintf(cq, "(%d)", sa->sa_family);
while (s < slim && cq < cqlim) {
cq += sprintf(cq, " %02x", *s++);
if (s < slim)
cq += sprintf(cq, "%02x", *s++);
}
cp = workbuf;
}
}
return (cp);
}
static void
p_flags(int f, const char *format)
{
printf(format, fmt_flags(f));
}
static const char *
fmt_flags(int f)
{
static char name[33];
char *flags;
struct bits *p = bits;
for (flags = name; p->b_mask; p++)
if (p->b_mask & f)
*flags++ = p->b_val;
*flags = '\0';
return (name);
}
static void
p_rtentry(struct rtentry *rt)
{
static struct ifnet ifnet, *lastif;
struct rtentry parent;
static char buffer[128];
static char prettyname[128];
struct sockaddr *sa;
sa_u addr, mask;
/*
* Don't print protocol-cloned routes unless -a.
*/
if (rt->rt_flags & RTF_WASCLONED && !aflag) {
kget(rt->rt_parent, parent);
if (parent.rt_flags & RTF_PRCLONING)
return;
}
bzero(&addr, sizeof(addr));
if ((sa = kgetsa(rt_key(rt))))
bcopy(sa, &addr, sa->sa_len);
bzero(&mask, sizeof(mask));
if (rt_mask(rt) && (sa = kgetsa(rt_mask(rt))))
bcopy(sa, &mask, sa->sa_len);
p_sockaddr(&addr.u_sa, &mask.u_sa, rt->rt_flags, wid_dst);
p_sockaddr(kgetsa(rt->rt_gateway), NULL, RTF_HOST, wid_gw);
snprintf(buffer, sizeof(buffer), "%%-%d.%ds ", wid_flags, wid_flags);
p_flags(rt->rt_flags, buffer);
if (addr.u_sa.sa_family == AF_INET || Wflag) {
printf("%*ld %*lu ", wid_refs, rt->rt_refcnt,
wid_use, rt->rt_use);
if (Wflag) {
if (rt->rt_rmx.rmx_mtu != 0)
printf("%*lu ", wid_mtu, rt->rt_rmx.rmx_mtu);
else
printf("%*s ", wid_mtu, "");
}
}
if (rt->rt_ifp) {
if (rt->rt_ifp != lastif) {
kget(rt->rt_ifp, ifnet);
lastif = rt->rt_ifp;
strlcpy(prettyname, ifnet.if_xname, sizeof(prettyname));
}
printf("%*.*s", wid_if, wid_if, prettyname);
if (rt->rt_rmx.rmx_expire) {
time_t expire_time;
if ((expire_time =
rt->rt_rmx.rmx_expire - time(NULL)) > 0)
printf(" %*d", wid_expire, (int)expire_time);
else
printf("%*s ", wid_expire, "");
} else {
printf("%*s ", wid_expire, "");
}
if (rt->rt_nodes[0].rn_dupedkey)
printf(" =>");
}
if (Wflag) {
if (rt->rt_shim[0] != NULL)
printf(" %-*s", wid_mplslops, labelops(rt));
else
printf(" %-*s", wid_mplslops, "");
if (rt->rt_rmx.rmx_msl != 0)
printf(" %*lu", wid_msl, rt->rt_rmx.rmx_msl);
else
printf("%*s ", wid_msl, "");
if (rt->rt_rmx.rmx_iwmaxsegs != 0)
printf(" %*lu", wid_iwmax, rt->rt_rmx.rmx_iwmaxsegs);
else
printf("%*s ", wid_iwmax, "");
if (rt->rt_rmx.rmx_iwcapsegs != 0)
printf(" %*lu", wid_iw, rt->rt_rmx.rmx_iwcapsegs);
else
printf("%*s ", wid_iw, "");
}
putchar('\n');
}
char *
routename(u_long in)
{
char *cp;
static char line[MAXHOSTNAMELEN];
struct hostent *hp;
cp = NULL;
if (!numeric_addr) {
hp = gethostbyaddr(&in, sizeof (struct in_addr), AF_INET);
if (hp) {
cp = hp->h_name;
trimdomain(cp, strlen(cp));
}
}
if (cp) {
strncpy(line, cp, sizeof(line) - 1);
line[sizeof(line) - 1] = '\0';
} else {
#define C(x) ((x) & 0xff)
in = ntohl(in);
sprintf(line, "%lu.%lu.%lu.%lu",
C(in >> 24), C(in >> 16), C(in >> 8), C(in));
}
return (line);
}
static u_long
forgemask(u_long a)
{
u_long m;
if (IN_CLASSA(a))
m = IN_CLASSA_NET;
else if (IN_CLASSB(a))
m = IN_CLASSB_NET;
else
m = IN_CLASSC_NET;
return (m);
}
static void
domask(char *dst, u_long addr, u_long mask)
{
int b, i;
if (!mask || (forgemask(addr) == mask)) {
*dst = '\0';
return;
}
i = 0;
for (b = 0; b < 32; b++)
if (mask & (1 << b)) {
int bb;
i = b;
for (bb = b+1; bb < 32; bb++)
if (!(mask & (1 << bb))) {
i = -1; /* noncontig */
break;
}
break;
}
if (i == -1)
sprintf(dst, "&0x%lx", mask);
else
sprintf(dst, "/%d", 32-i);
}
/*
* 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(u_long in, u_long mask)
{
char *cp = NULL;
static char line[MAXHOSTNAMELEN];
struct netent *np = NULL;
u_long dmask;
u_long i;
#define NSHIFT(m) ( \
(m) == IN_CLASSA_NET ? IN_CLASSA_NSHIFT : \
(m) == IN_CLASSB_NET ? IN_CLASSB_NSHIFT : \
(m) == IN_CLASSC_NET ? IN_CLASSC_NSHIFT : \
0)
i = ntohl(in);
dmask = forgemask(i);
if (!numeric_addr && i) {
np = getnetbyaddr(i >> NSHIFT(mask), AF_INET);
if (np == NULL && mask == 0)
np = getnetbyaddr(i >> NSHIFT(dmask), AF_INET);
if (np != NULL) {
cp = np->n_name;
trimdomain(cp, strlen(cp));
}
}
#undef NSHIFT
if (cp != NULL) {
strncpy(line, cp, sizeof(line) - 1);
line[sizeof(line) - 1] = '\0';
} else {
if (mask <= IN_CLASSA_NET &&
(i & IN_CLASSA_HOST) == 0) {
sprintf(line, "%lu", C(i >> 24));
} else if (mask <= IN_CLASSB_NET &&
(i & IN_CLASSB_HOST) == 0) {
sprintf(line, "%lu.%lu",
C(i >> 24), C(i >> 16));
} else if (mask <= IN_CLASSC_NET &&
(i & IN_CLASSC_HOST) == 0) {
sprintf(line, "%lu.%lu.%lu",
C(i >> 24), C(i >> 16), C(i >> 8));
} else {
sprintf(line, "%lu.%lu.%lu.%lu",
C(i >> 24), C(i >> 16), C(i >> 8), C(i));
}
}
domask(line + strlen(line), i, mask);
return (line);
}
#ifdef INET6
const char *
netname6(struct sockaddr_in6 *sa6, struct in6_addr *mask)
{
static char line[MAXHOSTNAMELEN];
u_char *p = (u_char *)mask;
u_char *lim;
int masklen, illegal = 0, flag = NI_WITHSCOPEID;
if (mask) {
for (masklen = 0, lim = p + 16; p < lim; p++) {
switch (*p) {
case 0xff:
masklen += 8;
break;
case 0xfe:
masklen += 7;
break;
case 0xfc:
masklen += 6;
break;
case 0xf8:
masklen += 5;
break;
case 0xf0:
masklen += 4;
break;
case 0xe0:
masklen += 3;
break;
case 0xc0:
masklen += 2;
break;
case 0x80:
masklen += 1;
break;
case 0x00:
break;
default:
illegal ++;
break;
}
}