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freebsd-skq/usr.bin/netstat/route.c
hrs ce645d4546 - Fix a bug which can make sysctl() fail when -F is specified. 
- Increase WID_IF_DEFAULT() from 6 to 8 (the default for AF_INET6) because
  we have interfaces with longer names than 6 chars like epairN{a,b}.
- Style fixes.
2014-05-21 10:04:51 +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.
* 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>
#define _WANT_RTENTRY
#include <net/route.h>
#include <netinet/in.h>
#include <netgraph/ng_socket.h>
#include <sys/sysctl.h>
#include <arpa/inet.h>
#include <ifaddrs.h>
#include <libutil.h>
#include <netdb.h>
#include <nlist.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_PROTO3, '3' },
{ RTF_BLACKHOLE,'B' },
{ RTF_BROADCAST,'b' },
#ifdef RTF_LLINFO
{ RTF_LLINFO, 'L' },
#endif
{ 0 , 0 }
};
/*
* kvm(3) bindings for every needed symbol
*/
static struct nlist rl[] = {
#define N_RTSTAT 0
{ .n_name = "_rtstat" },
#define N_RTREE 1
{ .n_name = "_rt_tables"},
#define N_RTTRASH 2
{ .n_name = "_rttrash" },
{ .n_name = NULL },
};
typedef union {
long dummy; /* Helps align structure. */
struct sockaddr u_sa;
u_short u_data[128];
} sa_u;
static sa_u pt_u;
struct ifmap_entry {
char ifname[IFNAMSIZ];
};
static struct ifmap_entry *ifmap;
static int ifmap_size;
int do_rtent = 0;
struct rtentry rtentry;
struct radix_node rnode;
struct radix_mask rmask;
int NewTree = 1;
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_rtnode_kvm(void);
static void p_rtable_sysctl(int, int);
static void p_rtable_kvm(int, int );
static void p_rtree_kvm(struct radix_node *);
static void p_rtentry_sysctl(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_kvm(struct rtentry *);
static void domask(char *, in_addr_t, u_long);
/*
* Print routing tables.
*/
void
routepr(int fibnum, int af)
{
size_t intsize;
int numfibs;
intsize = sizeof(int);
if (fibnum == -1 &&
sysctlbyname("net.my_fibnum", &fibnum, &intsize, NULL, 0) == -1)
fibnum = 0;
if (sysctlbyname("net.fibs", &numfibs, &intsize, NULL, 0) == -1)
numfibs = 1;
if (fibnum < 0 || fibnum > numfibs - 1)
errx(EX_USAGE, "%d: invalid fib", fibnum);
/*
* Since kernel & userland use different timebase
* (time_uptime vs time_second) and we are reading kernel memory
* directly we should do rt_expire --> expire_time conversion.
*/
if (clock_gettime(CLOCK_UPTIME, &uptime) < 0)
err(EX_OSERR, "clock_gettime() failed");
printf("Routing tables");
if (fibnum)
printf(" (fib: %d)", fibnum);
printf("\n");
if (Aflag == 0 && live != 0 && NewTree)
p_rtable_sysctl(fibnum, af);
else
p_rtable_kvm(fibnum, af);
}
/*
* 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_ISO:
afname = "ISO";
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 ? 10 : 8) /* 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 ? 10 : 8))
#endif /*INET6*/
static int wid_dst;
static int wid_gw;
static int wid_flags;
static int wid_pksent;
static int wid_mtu;
static int wid_if;
static int wid_expire;
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_pksent = 8;
wid_mtu = 6;
wid_if = WID_IF_DEFAULT(ef);
wid_expire = 6;
if (Wflag && rn != NULL)
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 (Wflag) {
len = snprintf(buffer, sizeof(buffer), "%ju",
(uintmax_t )kread_counter((u_long )rt->rt_pksent));
wid_pksent = MAX(len, wid_pksent);
}
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_expire) {
time_t expire_time;
if ((expire_time =
rt->rt_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 (Wflag) {
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_pksent, wid_pksent, "Use",
wid_mtu, wid_mtu, "Mtu",
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);
}
/*
* Print kernel routing tables for given fib
* using debugging kvm(3) interface.
*/
static void
p_rtable_kvm(int fibnum, int af)
{
struct radix_node_head **rnhp, *rnh, head;
struct radix_node_head **rt_tables;
u_long rtree;
int fam, af_size;
kresolve_list(rl);
if ((rtree = rl[N_RTREE].n_value) == 0) {
printf("rt_tables: symbol not in namelist\n");
return;
}
af_size = (AF_MAX + 1) * sizeof(struct radix_node_head *);
rt_tables = calloc(1, af_size);
if (rt_tables == NULL)
err(EX_OSERR, "memory allocation failed");
if (kread((u_long)(rtree), (char *)(rt_tables) + fibnum * af_size,
af_size) != 0)
err(EX_OSERR, "error retrieving radix pointers");
for (fam = 0; fam <= AF_MAX; fam++) {
int tmpfib;
switch (fam) {
case AF_INET6:
case AF_INET:
tmpfib = fibnum;
break;
default:
tmpfib = 0;
}
rnhp = (struct radix_node_head **)*rt_tables;
/* Calculate the in-kernel address. */
rnhp += tmpfib * (AF_MAX + 1) + fam;
/* Read the in kernel rhn pointer. */
if (kget(rnhp, rnh) != 0)
continue;
if (rnh == NULL)
continue;
/* Read the rnh data. */
if (kget(rnh, head) != 0)
continue;
if (fam == AF_UNSPEC) {
if (Aflag && af == 0) {
printf("Netmasks:\n");
p_rtree_kvm(head.rnh_treetop);
}
} else if (af == AF_UNSPEC || af == fam) {
size_cols(fam, head.rnh_treetop);
pr_family(fam);
do_rtent = 1;
pr_rthdr(fam);
p_rtree_kvm(head.rnh_treetop);
}
}
free(rt_tables);
}
/*
* Print given kernel radix tree using
* debugging kvm(3) interface.
*/
static void
p_rtree_kvm(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_kvm(&rtentry);
if (Aflag)
p_rtnode_kvm();
}
} 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_kvm();
}
rn = rnode.rn_right;
p_rtree_kvm(rnode.rn_left);
p_rtree_kvm(rn);
}
}
char nbuf[20];
static void
p_rtnode_kvm(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
p_rtable_sysctl(int fibnum, int af)
{
size_t needed;
int mib[7];
char *buf, *next, *lim;
struct rt_msghdr *rtm;
struct sockaddr *sa;
int fam = 0, ifindex = 0, size;
struct ifaddrs *ifap, *ifa;
struct sockaddr_dl *sdl;
/*
* Retrieve interface list at first
* since we need #ifindex -> if_xname match
*/
if (getifaddrs(&ifap) != 0)
err(EX_OSERR, "getifaddrs");
for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
if (ifa->ifa_addr->sa_family != AF_LINK)
continue;
sdl = (struct sockaddr_dl *)ifa->ifa_addr;
ifindex = sdl->sdl_index;
if (ifindex >= ifmap_size) {
size = roundup(ifindex + 1, 32) *
sizeof(struct ifmap_entry);
if ((ifmap = realloc(ifmap, size)) == NULL)
errx(2, "realloc(%d) failed", size);
memset(&ifmap[ifmap_size], 0,
size - ifmap_size *
sizeof(struct ifmap_entry));
ifmap_size = roundup(ifindex + 1, 32);
}
if (*ifmap[ifindex].ifname != '\0')
continue;
strlcpy(ifmap[ifindex].ifname, ifa->ifa_name, IFNAMSIZ);
}
freeifaddrs(ifap);
mib[0] = CTL_NET;
mib[1] = PF_ROUTE;
mib[2] = 0;
mib[3] = af;
mib[4] = NET_RT_DUMP;
mib[5] = 0;
mib[6] = fibnum;
if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0)
err(EX_OSERR, "sysctl: net.route.0.%d.dump.%d estimate", af,
fibnum);
if ((buf = malloc(needed)) == NULL)
errx(2, "malloc(%lu)", (unsigned long)needed);
if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0)
err(1, "sysctl: net.route.0.%d.dump.%d", af, fibnum);
lim = buf + needed;
for (next = buf; next < lim; next += rtm->rtm_msglen) {
rtm = (struct rt_msghdr *)next;
if (rtm->rtm_version != RTM_VERSION)
continue;
/*
* Peek inside header to determine AF
*/
sa = (struct sockaddr *)(rtm + 1);
if (fam != sa->sa_family) {
fam = sa->sa_family;
size_cols(fam, NULL);
pr_family(fam);
pr_rthdr(fam);
}
p_rtentry_sysctl(rtm);
}
free(buf);
}
static void
p_rtentry_sysctl(struct rt_msghdr *rtm)
{
struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
char buffer[128];
char prettyname[128];
sa_u addr, mask, gw;
unsigned int l;
#define GETSA(_s, _f) { \
bzero(&(_s), sizeof(_s)); \
if (rtm->rtm_addrs & _f) { \
l = roundup(sa->sa_len, sizeof(long)); \
memcpy(&(_s), sa, (l > sizeof(_s)) ? sizeof(_s) : l); \
sa = (struct sockaddr *)((char *)sa + l); \
} \
}
GETSA(addr, RTA_DST);
GETSA(gw, RTA_GATEWAY);
GETSA(mask, RTA_NETMASK);
p_sockaddr(&addr.u_sa, &mask.u_sa, rtm->rtm_flags, wid_dst);
p_sockaddr(&gw.u_sa, NULL, RTF_HOST, wid_gw);
snprintf(buffer, sizeof(buffer), "%%-%d.%ds ", wid_flags, wid_flags);
p_flags(rtm->rtm_flags, buffer);
if (Wflag) {
printf("%*lu ", wid_pksent, rtm->rtm_rmx.rmx_pksent);
if (rtm->rtm_rmx.rmx_mtu != 0)
printf("%*lu ", wid_mtu, rtm->rtm_rmx.rmx_mtu);
else
printf("%*s ", wid_mtu, "");
}
memset(prettyname, 0, sizeof(prettyname));
if (rtm->rtm_index < ifmap_size) {
strlcpy(prettyname, ifmap[rtm->rtm_index].ifname,
sizeof(prettyname));
if (*prettyname == '\0')
strlcpy(prettyname, "---", sizeof(prettyname));
}
printf("%*.*s", wid_if, wid_if, prettyname);
if (rtm->rtm_rmx.rmx_expire) {
time_t expire_time;
if ((expire_time =
rtm->rtm_rmx.rmx_expire - uptime.tv_sec) > 0)
printf(" %*d", wid_expire, (int)expire_time);
}
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,
((struct sockaddr_in *)mask)->sin_addr.s_addr);
else
cp = netname(sockin->sin_addr.s_addr, INADDR_ANY);
break;
}
#ifdef INET6
case AF_INET6:
{
struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa;
/*
* The sa6->sin6_scope_id must be filled here because
* this sockaddr is extracted from kmem(4) directly
* and has KAME-specific embedded scope id in
* sa6->sin6_addr.s6_addr[2].
*/
in6_fillscopeid(sa6);
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_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_kvm(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 (Wflag) {
printf("%*ju ", wid_pksent,
(uintmax_t )kread_counter((u_long )rt->rt_pksent));
if (rt->rt_mtu != 0)
printf("%*lu ", wid_mtu, rt->rt_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_expire) {
time_t expire_time;
if ((expire_time =
rt->rt_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.
*/
char *
netname(in_addr_t in, in_addr_t mask)
{
char *cp = 0;
static char line[MAXHOSTNAMELEN];
struct netent *np = 0;
in_addr_t i;
/* It is ok to supply host address. */
in &= mask;
i = ntohl(in);
if (!numeric_addr && i) {
np = getnetbyaddr(i >> NSHIFT(ntohl(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, ntohl(mask));
return (line);
}
#undef NSHIFT
#ifdef INET6
void
in6_fillscopeid(struct sockaddr_in6 *sa6)
{
#if defined(__KAME__)
/*
* 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(&sa6->sin6_addr) ||
IN6_IS_ADDR_MC_NODELOCAL(&sa6->sin6_addr) ||
IN6_IS_ADDR_MC_LINKLOCAL(&sa6->sin6_addr)) {
if (sa6->sin6_scope_id == 0)
sa6->sin6_scope_id =
ntohs(*(u_int16_t *)&sa6->sin6_addr.s6_addr[2]);
sa6->sin6_addr.s6_addr[2] = sa6->sin6_addr.s6_addr[3] = 0;
}
#endif
}
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(void)
{
struct rtstat rtstat;
u_long rtsaddr, rttaddr;
int rttrash;
kresolve_list(rl);
if ((rtsaddr = rl[N_RTSTAT].n_value) == 0) {
printf("rtstat: symbol not in namelist\n");
return;
}
if ((rttaddr = rl[N_RTTRASH].n_value) == 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%hu bad routing redirect%s\n");
p(rts_dynamic, "\t%hu dynamically created route%s\n");
p(rts_newgateway, "\t%hu new gateway%s due to redirects\n");
p(rts_unreach, "\t%hu destination%s found unreachable\n");
p(rts_wildcard, "\t%hu 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));
}
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