NetBSD-5.0.2/usr.bin/netstat/show.c
/* $NetBSD: show.c,v 1.6 2006/12/23 11:05:14 jdc Exp $ */
/* $OpenBSD: show.c,v 1.1 2006/05/27 19:16:37 claudio 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/param.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/mbuf.h>
#include <sys/sysctl.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#include <net/pfvar.h>
#include <net/pfkeyv2.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/if_ether.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 "netstat.h"
char *any_ntoa(const struct sockaddr *);
char *link_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))
#define PFKEYV2_CHUNK sizeof(u_int64_t)
/*
* 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_MASK, 'm' }, /* Mask Present -- for routing messages only */
{ RTF_CLONING, 'C' },
{ RTF_XRESOLVE, 'X' },
{ RTF_LLINFO, 'L' },
{ RTF_STATIC, 'S' },
{ RTF_PROTO1, '1' },
{ RTF_PROTO2, '2' },
/* { RTF_PROTO3, '3' }, */
{ RTF_CLONED, 'c' },
/* { RTF_JUMBO, 'J' }, */
{ 0 }
};
void pr_rthdr(int, int);
void p_rtentry(struct rt_msghdr *);
void pr_family(int);
void p_sockaddr(struct sockaddr *, struct sockaddr *, int, int);
void p_flags(int, char *);
char *routename4(in_addr_t);
char *routename6(struct sockaddr_in6 *);
/*
* Print routing tables.
*/
void
p_rttables(int af)
{
struct rt_msghdr *rtm;
char *buf = NULL, *next, *lim = NULL;
size_t needed;
int mib[6];
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;
if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
err(1, "route-sysctl-estimate");
if (needed > 0) {
if ((buf = malloc(needed)) == 0)
err(1, NULL);
if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
err(1, "sysctl of routing table");
lim = buf + needed;
}
printf("Routing tables\n");
if (buf) {
for (next = buf; next < lim; next += rtm->rtm_msglen) {
rtm = (struct rt_msghdr *)next;
sa = (struct sockaddr *)(rtm + 1);
if (af != AF_UNSPEC && sa->sa_family != af)
continue;
p_rtentry(rtm);
}
free(buf);
buf = NULL;
}
if (af != 0 && af != PF_KEY)
return;
#ifdef notyet /* XXX elad */
mib[0] = CTL_NET;
mib[1] = PF_KEY;
mib[2] = PF_KEY_V2;
mib[3] = NET_KEY_SPD_DUMP;
mib[4] = mib[5] = 0;
if (sysctl(mib, 4, NULL, &needed, NULL, 0) == -1) {
if (errno == ENOPROTOOPT)
return;
err(1, "spd-sysctl-estimate");
}
if (needed > 0) {
if ((buf = malloc(needed)) == 0)
err(1, NULL);
if (sysctl(mib, 4, buf, &needed, NULL, 0) == -1)
err(1,"sysctl of spd");
lim = buf + needed;
}
if (buf) {
printf("\nEncap:\n");
for (next = buf; next < lim; next += msg->sadb_msg_len *
PFKEYV2_CHUNK) {
msg = (struct sadb_msg *)next;
if (msg->sadb_msg_len == 0)
break;
p_pfkentry(msg);
}
free(buf);
buf = NULL;
}
#endif
}
/*
* 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_DST(af) ((af) == AF_INET6 ? (nflag ? 34 : 18) : 18)
#define WID_GW(af) ((af) == AF_INET6 ? (nflag ? 30 : 18) : 18)
/*
* Print header for routing table columns.
*/
void
pr_rthdr(int af, int Aflag)
{
if (Aflag)
printf("%-*.*s ", PLEN, PLEN, "Address");
if (af != PF_KEY)
printf("%-*.*s %-*.*s %-6.6s %6.6s %8.8s %6.6s %s\n",
WID_DST(af), WID_DST(af), "Destination",
WID_GW(af), WID_GW(af), "Gateway",
"Flags", "Refs", "Use", "Mtu", "Interface");
else
printf("%-18s %-5s %-18s %-5s %-5s %-22s\n",
"Source", "Port", "Destination",
"Port", "Proto", "SA(Address/Proto/Type/Direction)");
}
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 *)(rtm + 1);
struct sockaddr *mask, *rti_info[RTAX_MAX];
char ifbuf[IF_NAMESIZE];
if (old_af != sa->sa_family) {
old_af = sa->sa_family;
pr_family(sa->sa_family);
pr_rthdr(sa->sa_family, 0);
}
get_rtaddrs(rtm->rtm_addrs, sa, rti_info);
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(rti_info[RTAX_GATEWAY], NULL, RTF_HOST,
WID_GW(sa->sa_family));
p_flags(rtm->rtm_flags, "%-6.6s ");
#ifdef notyet /* XXX: elad */
printf("%6d %8ld ", (int)rtm->rtm_rmx.rmx_refcnt,
rtm->rtm_rmx.rmx_pksent);
#else
printf("%6s %8s ", "-", "-");
#endif
if (rtm->rtm_rmx.rmx_mtu)
printf("%6ld", rtm->rtm_rmx.rmx_mtu);
else
printf("%6s", "-");
putchar((rtm->rtm_rmx.rmx_locks & RTV_MTU) ? 'L' : ' ');
printf(" %.16s", if_indextoname(rtm->rtm_index, ifbuf));
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_APPLETALK:
afname = "AppleTalk";
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)) {
/* 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;
}
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);
}
}
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);
}
static char line[MAXHOSTNAMELEN];
static char domain[MAXHOSTNAMELEN];
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)) &&
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));
#ifdef notyet /* XXX elad */
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;
strlcpy(name, sr->sr_label, sizeof(name));
return (name);
}
/* FALLTHROUGH */
#endif
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)
{
char *cp = NULL;
struct netent *np = NULL;
int mbits;
in = ntohl(in);
mask = ntohl(mask);
if (!nflag && in != INADDR_ANY) {
if ((np = getnetbyaddr(in, AF_INET)) != NULL)
cp = np->n_name;
}
mbits = mask ? 33 - ffs(mask) : 0;
if (in == INADDR_ANY && !mbits)
cp = "default";
if (cp)
strlcpy(line, cp, 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);
}
#ifdef INET6
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);
if (lim < 0)
lim = 0;
else if (lim > sizeof(struct in6_addr))
lim = 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 < 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);
}
#endif
/*
* 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,
((struct sockaddr_in *)mask)->sin_addr.s_addr);
#ifdef INET6
case AF_INET6:
return netname6((struct sockaddr_in6 *)sa,
(struct sockaddr_in6 *)mask);
#endif
case AF_LINK:
return (link_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));
}
}