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freebsd/usr.bin/netstat/route.c
Qing Li 6e6b3f7cbc This main goals of this project are: 
1. separating L2 tables (ARP, NDP) from the L3 routing tables
2. removing as much locking dependencies among these layers as
   possible to allow for some parallelism in the search operations
3. simplify the logic in the routing code,

The most notable end result is the obsolescent of the route
cloning (RTF_CLONING) concept, which translated into code reduction
in both IPv4 ARP and IPv6 NDP related modules, and size reduction in
struct rtentry{}. The change in design obsoletes the semantics of
RTF_CLONING, RTF_WASCLONE and RTF_LLINFO routing flags. The userland
applications such as "arp" and "ndp" have been modified to reflect
those changes. The output from "netstat -r" shows only the routing
entries.

Quite a few developers have contributed to this project in the
past: Glebius Smirnoff, Luigi Rizzo, Alessandro Cerri, and
Andre Oppermann. And most recently:

- Kip Macy revised the locking code completely, thus completing
  the last piece of the puzzle, Kip has also been conducting
  active functional testing
- Sam Leffler has helped me improving/refactoring the code, and
  provided valuable reviews
- Julian Elischer setup the perforce tree for me and has helped
  me maintaining that branch before the svn conversion
2008-12-15 06:10:57 +00:00

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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.
*/
#if 0
#ifndef lint
static char sccsid[] = "From: @(#)route.c 8.6 (Berkeley) 4/28/95";
#endif /* not lint */
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.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/radix.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netipx/ipx.h>
#include <netatalk/at.h>
#include <netgraph/ng_socket.h>
#include <sys/sysctl.h>
#include <arpa/inet.h>
#include <libutil.h>
#include <netdb.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>
#include <err.h>
#include "netstat.h"
#define kget(p, d) (kread((u_long)(p), (char *)&(d), sizeof (d)))
/*
* 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_XRESOLVE, 'X' },
{ RTF_STATIC, 'S' },
{ RTF_PROTO1, '1' },
{ RTF_PROTO2, '2' },
{ RTF_PRCLONING,'c' },
{ RTF_PROTO3, '3' },
{ RTF_BLACKHOLE,'B' },
{ RTF_BROADCAST,'b' },
#ifdef RTF_LLINFO
{ RTF_LLINFO, 'L' },
#endif
#ifdef RTF_WASCLONED
{ RTF_WASCLONED,'W' },
#endif
#ifdef RTF_CLONING
{ RTF_CLONING, 'C' },
#endif
{ 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 fibnum;
int do_rtent = 0;
struct rtentry rtentry;
struct radix_node rnode;
struct radix_mask rmask;
struct rtline {
struct radix_node_head *tables[AF_MAX+1]; /*xxx*/
};
struct rtline *rt_tables;
struct radix_node_head *rt_tables_line[1][AF_MAX+1]; /*xxx*/
int NewTree = 0;
struct timespec uptime;
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 void domask(char *, in_addr_t, u_long);
/*
* Print routing tables.
*/
void
routepr(u_long rtree)
{
struct radix_node_head *rnh, head;
size_t intsize;
int i;
int numfibs;
intsize = sizeof(int);
if (sysctlbyname("net.my_fibnum", &fibnum, &intsize, NULL, 0) == -1)
fibnum = 0;
if (sysctlbyname("net.fibs", &numfibs, &intsize, NULL, 0) == -1)
numfibs = 1;
rt_tables = calloc(numfibs, sizeof(struct rtline));
if (rt_tables == NULL)
err(EX_OSERR, "memory allocation failed");
/*
* Since kernel & userland use different timebase
* (time_uptime vs time_second) and we are reading kernel memory
* directly we should do rt_rmx.rmx_expire --> expire_time conversion.
*/
if (clock_gettime(CLOCK_UPTIME, &uptime) < 0)
err(EX_OSERR, "clock_gettime() failed");
printf("Routing tables\n");
if (Aflag == 0 && NewTree)
ntreestuff();
else {
if (rtree == 0) {
printf("rt_tables: symbol not in namelist\n");
return;
}
if (kread((u_long)(rtree), (char *)(rt_tables),
(numfibs * sizeof(struct rtline))) != 0)
return;
for (i = 0; i <= AF_MAX; i++) {
int tmpfib;
if (i != AF_INET)
tmpfib = 0;
else
tmpfib = fibnum;
if ((rnh = rt_tables[tmpfib].tables[i]) == 0)
continue;
if (kget(rnh, head) != 0)
continue;
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_APPLETALK:
afname = "AppleTalk";
break;
case AF_CCITT:
afname = "X.25";
break;
case AF_NETGRAPH:
afname = "Netgraph";
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 void
size_cols(int ef __unused, 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;
if (Wflag)
size_cols_tree(rn);
}
static void
size_cols_tree(struct radix_node *rn)
{
again:
if (kget(rn, rnode) != 0)
return;
if (!(rnode.rn_flags & RNF_ACTIVE))
return;
if (rnode.rn_bit < 0) {
if ((rnode.rn_flags & RNF_ROOT) == 0) {
if (kget(rn, rtentry) != 0)
return;
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;
static char buffer[100];
const char *bp;
struct sockaddr *sa;
sa_u addr, mask;
int len;
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), "%d", 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) {
if (kget(rt->rt_ifp, ifnet) == 0)
len = strlen(ifnet.if_xname);
else
len = strlen("---");
lastif = rt->rt_ifp;
wid_if = MAX(len, wid_if);
}
if (rt->rt_rmx.rmx_expire) {
time_t expire_time;
if ((expire_time =
rt->rt_rmx.rmx_expire - uptime.tv_sec) > 0) {
len = snprintf(buffer, sizeof(buffer), "%d",
(int)expire_time);
wid_expire = MAX(len, wid_expire);
}
}
}
}
/*
* 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\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");
} 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)
{
if (kget(dst, pt_u.u_sa) != 0)
return (NULL);
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:
if (kget(rn, rnode) != 0)
return;
if (!(rnode.rn_flags & RNF_ACTIVE))
return;
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) {
if (kget(rn, rtentry) == 0) {
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 == 0)
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) {
if (kget(rm, rmask) != 0)
break;
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>, ");
if (kget(rmask.rm_leaf, rnode_aux) == 0)
p_sockaddr(kgetsa((struct sockaddr *)rnode_aux.rn_mask),
NULL, 0, -1);
else
p_sockaddr(NULL, NULL, 0, -1);
} else
p_sockaddr(kgetsa((struct sockaddr *)rmask.rm_mask),
NULL, 0, -1);
putchar('}');
if ((rm = rmask.rm_mklist))
printf(" ->");
}
putchar('\n');
}
static void
ntreestuff(void)
{
size_t needed;
int mib[6];
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 (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) {
err(1, "sysctl: net.route.0.0.dump estimate");
}
if ((buf = malloc(needed)) == 0) {
errx(2, "malloc(%lu)", (unsigned long)needed);
}
if (sysctl(mib, 6, 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 *)(SA_SIZE(sa) + (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;
if (sa == NULL)
return ("null");
switch(sa->sa_family) {
case AF_INET:
{
struct sockaddr_in *sockin = (struct sockaddr_in *)sa;
if ((sockin->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(sockin->sin_addr.s_addr);
else if (mask)
cp = netname(sockin->sin_addr.s_addr,
ntohl(((struct sockaddr_in *)mask)
->sin_addr.s_addr));
else
cp = netname(sockin->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_APPLETALK:
{
if (!(flags & RTF_HOST) && mask)
cp = atalk_print2(sa,mask,9);
else
cp = atalk_print(sa,11);
break;
}
case AF_NETGRAPH:
{
strlcpy(workbuf, ((struct sockaddr_ng *)sa)->sg_data,
sizeof(workbuf));
cp = workbuf;
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);
cp = workbuf;
} else
switch (sdl->sdl_type) {
case IFT_ETHER:
case IFT_L2VLAN:
case IFT_BRIDGE:
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;
}
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;
static char buffer[128];
static char prettyname[128];
struct sockaddr *sa;
sa_u addr, mask;
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("%*d %*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) {
if (kget(rt->rt_ifp, ifnet) == 0)
strlcpy(prettyname, ifnet.if_xname,
sizeof(prettyname));
else
strlcpy(prettyname, "---", sizeof(prettyname));
lastif = rt->rt_ifp;
}
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 - uptime.tv_sec) > 0)
printf(" %*d", wid_expire, (int)expire_time);
}
if (rt->rt_nodes[0].rn_dupedkey)
printf(" =>");
}
putchar('\n');
}
char *
routename(in_addr_t in)
{
char *cp;
static char line[MAXHOSTNAMELEN];
struct hostent *hp;
cp = 0;
if (!numeric_addr) {
hp = gethostbyaddr(&in, sizeof (struct in_addr), AF_INET);
if (hp) {
cp = hp->h_name;
trimdomain(cp, strlen(cp));
}
}
if (cp) {
strlcpy(line, cp, sizeof(line));
} else {
#define C(x) ((x) & 0xff)
in = ntohl(in);
sprintf(line, "%u.%u.%u.%u",
C(in >> 24), C(in >> 16), C(in >> 8), C(in));
}
return (line);
}
#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)
static void
domask(char *dst, in_addr_t addr __unused, u_long mask)
{
int b, i;
if (mask == 0 || (!numeric_addr && NSHIFT(mask) != 0)) {
*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(in_addr_t in, u_long mask)
{
char *cp = 0;
static char line[MAXHOSTNAMELEN];
struct netent *np = 0;
in_addr_t i;
i = ntohl(in);
if (!numeric_addr && i) {
np = getnetbyaddr(i >> NSHIFT(mask), AF_INET);
if (np != NULL) {
cp = np->n_name;
trimdomain(cp, strlen(cp));
}
}
if (cp != NULL) {
strlcpy(line, cp, sizeof(line));
} else {
inet_ntop(AF_INET, &in, line, sizeof(line) - 1);
}
domask(line + strlen(line), i, mask);
return (line);
}
#undef NSHIFT
#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 = 0;
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;
}
}
if (illegal)
fprintf(stderr, "illegal prefixlen\n");
}
else
masklen = 128;
if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&sa6->sin6_addr))
return("default");
if (numeric_addr)
flag |= NI_NUMERICHOST;
getnameinfo((struct sockaddr *)sa6, sa6->sin6_len, line, sizeof(line),
NULL, 0, flag);
if (numeric_addr)
sprintf(&line[strlen(line)], "/%d", masklen);
return line;
}
char *
routename6(struct sockaddr_in6 *sa6)
{
static char line[MAXHOSTNAMELEN];
int flag = 0;
/* use local variable for safety */
struct sockaddr_in6 sa6_local;
sa6_local.sin6_family = AF_INET6;
sa6_local.sin6_len = sizeof(sa6_local);
sa6_local.sin6_addr = sa6->sin6_addr;
sa6_local.sin6_scope_id = sa6->sin6_scope_id;
if (numeric_addr)
flag |= NI_NUMERICHOST;
getnameinfo((struct sockaddr *)&sa6_local, sa6_local.sin6_len,
line, sizeof(line), NULL, 0, flag);
return line;
}
#endif /*INET6*/
/*
* Print routing statistics
*/
void
rt_stats(u_long rtsaddr, u_long rttaddr)
{
struct rtstat rtstat;
int rttrash;
if (rtsaddr == 0) {
printf("rtstat: symbol not in namelist\n");
return;
}
if (rttaddr == 0) {
printf("rttrash: symbol not in namelist\n");
return;
}
kread(rtsaddr, (char *)&rtstat, sizeof (rtstat));
kread(rttaddr, (char *)&rttrash, sizeof (rttrash));
printf("routing:\n");
#define p(f, m) if (rtstat.f || sflag <= 1) \
printf(m, rtstat.f, plural(rtstat.f))
p(rts_badredirect, "\t%u bad routing redirect%s\n");
p(rts_dynamic, "\t%u dynamically created route%s\n");
p(rts_newgateway, "\t%u new gateway%s due to redirects\n");
p(rts_unreach, "\t%u destination%s found unreachable\n");
p(rts_wildcard, "\t%u use%s of a wildcard route\n");
#undef p
if (rttrash || sflag <= 1)
printf("\t%u route%s not in table but not freed\n",
rttrash, plural(rttrash));
}
char *
ipx_print(struct sockaddr *sa)
{
u_short port;
struct servent *sp = 0;
const char *net = "", *host = "";
char *p;
u_char *q;
struct ipx_addr work = ((struct sockaddr_ipx *)sa)->sipx_addr;
static char mybuf[50];
char cport[10], chost[15], cnet[15];
port = ntohs(work.x_port);
if (ipx_nullnet(work) && ipx_nullhost(work)) {
if (port) {
if (sp)
sprintf(mybuf, "*.%s", sp->s_name);
else
sprintf(mybuf, "*.%x", port);
} else
sprintf(mybuf, "*.*");
return (mybuf);
}
if (ipx_wildnet(work))
net = "any";
else if (ipx_nullnet(work))
net = "*";
else {
q = work.x_net.c_net;
sprintf(cnet, "%02x%02x%02x%02x",
q[0], q[1], q[2], q[3]);
for (p = cnet; *p == '0' && p < cnet + 8; p++)
continue;
net = p;
}
if (ipx_wildhost(work))
host = "any";
else if (ipx_nullhost(work))
host = "*";
else {
q = work.x_host.c_host;
sprintf(chost, "%02x%02x%02x%02x%02x%02x",
q[0], q[1], q[2], q[3], q[4], q[5]);
for (p = chost; *p == '0' && p < chost + 12; p++)
continue;
host = p;
}
if (port) {
if (strcmp(host, "*") == 0)
host = "";
if (sp)
snprintf(cport, sizeof(cport),
"%s%s", *host ? "." : "", sp->s_name);
else
snprintf(cport, sizeof(cport),
"%s%x", *host ? "." : "", port);
} else
*cport = 0;
snprintf(mybuf, sizeof(mybuf), "%s.%s%s", net, host, cport);
return(mybuf);
}
char *
ipx_phost(struct sockaddr *sa)
{
struct sockaddr_ipx *sipx = (struct sockaddr_ipx *)sa;
struct sockaddr_ipx work;
static union ipx_net ipx_zeronet;
char *p;
struct ipx_addr in;
work = *sipx;
in = work.sipx_addr;
work.sipx_addr.x_port = 0;
work.sipx_addr.x_net = ipx_zeronet;
p = ipx_print((struct sockaddr *)&work);
if (strncmp("*.", p, 2) == 0) p += 2;
return(p);
}
void
upHex(char *p0)
{
char *p = p0;
for (; *p; p++)
switch (*p) {
case 'a':
case 'b':
case 'c':
case 'd':
case 'e':
case 'f':
*p += ('A' - 'a');
break;
}
}
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