740 lines
16 KiB
C
740 lines
16 KiB
C
/* $NetBSD: show.c,v 1.15 2011/11/11 15:09:33 gdt Exp $ */
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/* $OpenBSD: show.c,v 1.1 2006/05/27 19:16:37 claudio Exp $ */
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/*
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* Copyright (c) 1983, 1988, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/protosw.h>
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#include <sys/socket.h>
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#include <sys/mbuf.h>
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#include <sys/sysctl.h>
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#include <net/if.h>
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#include <net/if_dl.h>
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#include <net/if_types.h>
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#include <net/pfvar.h>
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#include <net/pfkeyv2.h>
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#include <net/route.h>
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#include <netinet/in.h>
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#include <netinet/if_ether.h>
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#include <netmpls/mpls.h>
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#include <arpa/inet.h>
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#include <err.h>
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#include <errno.h>
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#include <netdb.h>
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#include <stdio.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "netstat.h"
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#include "prog_ops.h"
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char *any_ntoa(const struct sockaddr *);
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char *link_print(struct sockaddr *);
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#define PFKEYV2_CHUNK sizeof(u_int64_t)
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/*
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* Definitions for showing gateway flags.
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*/
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struct bits {
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int b_mask;
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char b_val;
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};
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static const struct bits bits[] = {
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{ RTF_UP, 'U' },
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{ RTF_GATEWAY, 'G' },
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{ RTF_HOST, 'H' },
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{ RTF_REJECT, 'R' },
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{ RTF_BLACKHOLE, 'B' },
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{ RTF_DYNAMIC, 'D' },
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{ RTF_MODIFIED, 'M' },
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{ RTF_DONE, 'd' }, /* Completed -- for routing messages only */
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{ RTF_MASK, 'm' }, /* Mask Present -- for routing messages only */
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{ RTF_CLONING, 'C' },
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{ RTF_XRESOLVE, 'X' },
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{ RTF_LLINFO, 'L' },
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{ RTF_STATIC, 'S' },
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{ RTF_PROTO1, '1' },
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{ RTF_PROTO2, '2' },
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/* { RTF_PROTO3, '3' }, */
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{ RTF_CLONED, 'c' },
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/* { RTF_JUMBO, 'J' }, */
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{ RTF_ANNOUNCE, 'p' },
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{ 0, 0 }
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};
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void pr_rthdr(int, int);
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void p_rtentry(struct rt_msghdr *);
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void pr_family(int);
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void p_sockaddr(struct sockaddr *, struct sockaddr *, int, int);
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char *routename4(in_addr_t);
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char *routename6(struct sockaddr_in6 *);
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static void p_tag(const struct sockaddr *sa);
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/*
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* Print routing tables.
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*/
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void
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p_rttables(int paf)
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{
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struct rt_msghdr *rtm;
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char *buf = NULL, *next, *lim = NULL;
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size_t needed;
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int mib[6];
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struct sockaddr *sa;
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mib[0] = CTL_NET;
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mib[1] = PF_ROUTE;
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mib[2] = 0;
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mib[3] = paf;
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mib[4] = NET_RT_DUMP;
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mib[5] = 0;
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if (prog_sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
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err(1, "route-sysctl-estimate");
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if (needed > 0) {
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if ((buf = malloc(needed)) == 0)
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err(1, NULL);
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if (prog_sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
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err(1, "sysctl of routing table");
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lim = buf + needed;
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}
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printf("Routing tables\n");
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if (buf) {
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for (next = buf; next < lim; next += rtm->rtm_msglen) {
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rtm = (struct rt_msghdr *)next;
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sa = (struct sockaddr *)(rtm + 1);
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if (paf != AF_UNSPEC && sa->sa_family != paf)
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continue;
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p_rtentry(rtm);
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}
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free(buf);
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buf = NULL;
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}
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if (paf != 0 && paf != PF_KEY)
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return;
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#if 0 /* XXX-elad */
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mib[0] = CTL_NET;
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mib[1] = PF_KEY;
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mib[2] = PF_KEY_V2;
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mib[3] = NET_KEY_SPD_DUMP;
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mib[4] = mib[5] = 0;
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if (prog_sysctl(mib, 4, NULL, &needed, NULL, 0) == -1) {
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if (errno == ENOPROTOOPT)
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return;
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err(1, "spd-sysctl-estimate");
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}
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if (needed > 0) {
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if ((buf = malloc(needed)) == 0)
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err(1, NULL);
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if (prog_sysctl(mib, 4, buf, &needed, NULL, 0) == -1)
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err(1,"sysctl of spd");
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lim = buf + needed;
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}
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if (buf) {
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printf("\nEncap:\n");
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for (next = buf; next < lim; next += msg->sadb_msg_len *
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PFKEYV2_CHUNK) {
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msg = (struct sadb_msg *)next;
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if (msg->sadb_msg_len == 0)
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break;
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p_pfkentry(msg);
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}
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free(buf);
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buf = NULL;
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}
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#endif /* 0 */
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}
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/*
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* column widths; each followed by one space
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* width of destination/gateway column
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* strlen("fe80::aaaa:bbbb:cccc:dddd@gif0") == 30, strlen("/128") == 4
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*/
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#define WID_DST(af) ((af) == AF_INET6 ? (nflag ? 34 : 18) : 18)
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#define WID_GW(af) ((af) == AF_INET6 ? (nflag ? 30 : 18) : 18)
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/*
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* Print header for routing table columns.
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*/
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void
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pr_rthdr(int paf, int pAflag)
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{
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if (pAflag)
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printf("%-*.*s ", PLEN, PLEN, "Address");
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if (paf != PF_KEY) {
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if (tagflag == 1)
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printf("%-*.*s %-*.*s %-6.6s %6.6s %8.8s %6.6s %7.7s"
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" %s\n", WID_DST(paf), WID_DST(paf), "Destination",
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WID_GW(paf), WID_GW(paf), "Gateway",
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"Flags", "Refs", "Use", "Mtu", "Tag", "Interface");
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else
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printf("%-*.*s %-*.*s %-6.6s %6.6s %8.8s %6.6s %s\n",
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WID_DST(paf), WID_DST(paf), "Destination",
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WID_GW(paf), WID_GW(paf), "Gateway",
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"Flags", "Refs", "Use", "Mtu", "Interface");
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} else
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printf("%-18s %-5s %-18s %-5s %-5s %-22s\n",
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"Source", "Port", "Destination",
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"Port", "Proto", "SA(Address/Proto/Type/Direction)");
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}
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static void
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get_rtaddrs(int addrs, struct sockaddr *sa, struct sockaddr **rti_info)
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{
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int i;
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for (i = 0; i < RTAX_MAX; i++) {
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if (addrs & (1 << i)) {
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rti_info[i] = sa;
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sa = (struct sockaddr *)((char *)(sa) +
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RT_ROUNDUP(sa->sa_len));
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} else
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rti_info[i] = NULL;
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}
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}
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/*
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* Print a routing table entry.
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*/
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void
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p_rtentry(struct rt_msghdr *rtm)
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{
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static int old_af = -1;
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struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
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struct sockaddr *mask, *rti_info[RTAX_MAX];
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char ifbuf[IF_NAMESIZE];
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if (old_af != sa->sa_family) {
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old_af = sa->sa_family;
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pr_family(sa->sa_family);
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pr_rthdr(sa->sa_family, 0);
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}
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get_rtaddrs(rtm->rtm_addrs, sa, rti_info);
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mask = rti_info[RTAX_NETMASK];
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if ((sa = rti_info[RTAX_DST]) == NULL)
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return;
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p_sockaddr(sa, mask, rtm->rtm_flags, WID_DST(sa->sa_family));
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p_sockaddr(rti_info[RTAX_GATEWAY], NULL, RTF_HOST,
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WID_GW(sa->sa_family));
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p_flags(rtm->rtm_flags, "%-6.6s ");
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#if 0 /* XXX-elad */
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printf("%6d %8"PRId64" ", (int)rtm->rtm_rmx.rmx_refcnt,
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rtm->rtm_rmx.rmx_pksent);
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#else
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printf("%6s %8s ", "-", "-");
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#endif
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if (rtm->rtm_rmx.rmx_mtu)
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printf("%6"PRId64, rtm->rtm_rmx.rmx_mtu);
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else
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printf("%6s", "-");
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putchar((rtm->rtm_rmx.rmx_locks & RTV_MTU) ? 'L' : ' ');
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if (tagflag == 1)
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p_tag(rti_info[RTAX_TAG]);
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printf(" %.16s", if_indextoname(rtm->rtm_index, ifbuf));
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putchar('\n');
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}
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/*
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* Print address family header before a section of the routing table.
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*/
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void
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pr_family(int paf)
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{
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const char *afname;
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switch (paf) {
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case AF_INET:
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afname = "Internet";
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break;
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case AF_INET6:
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afname = "Internet6";
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break;
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case PF_KEY:
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afname = "Encap";
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break;
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case AF_APPLETALK:
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afname = "AppleTalk";
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break;
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case AF_MPLS:
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afname = "MPLS";
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break;
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default:
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afname = NULL;
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break;
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}
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if (afname)
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printf("\n%s:\n", afname);
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else
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printf("\nProtocol Family %d:\n", paf);
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}
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void
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p_addr(struct sockaddr *sa, struct sockaddr *mask, int flags)
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{
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p_sockaddr(sa, mask, flags, WID_DST(sa->sa_family));
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}
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void
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p_gwaddr(struct sockaddr *sa, int gwaf)
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{
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p_sockaddr(sa, 0, RTF_HOST, WID_GW(gwaf));
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}
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void
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p_sockaddr(struct sockaddr *sa, struct sockaddr *mask, int flags, int width)
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{
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char *cp;
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switch (sa->sa_family) {
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case AF_INET6:
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{
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struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa;
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struct in6_addr *in6 = &sa6->sin6_addr;
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/*
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* XXX: This is a special workaround for KAME kernels.
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* sin6_scope_id field of SA should be set in the future.
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*/
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if (IN6_IS_ADDR_LINKLOCAL(in6) ||
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IN6_IS_ADDR_MC_LINKLOCAL(in6)) {
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/* XXX: override is ok? */
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sa6->sin6_scope_id = (u_int32_t)ntohs(*(u_short *)
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&in6->s6_addr[2]);
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*(u_short *)&in6->s6_addr[2] = 0;
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}
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if (flags & RTF_HOST)
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cp = routename((struct sockaddr *)sa6);
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else
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cp = netname((struct sockaddr *)sa6, mask);
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break;
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}
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default:
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if ((flags & RTF_HOST) || mask == NULL)
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cp = routename(sa);
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else
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cp = netname(sa, mask);
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break;
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}
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if (width < 0)
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printf("%s", cp);
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else {
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if (nflag)
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printf("%-*s ", width, cp);
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else
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printf("%-*.*s ", width, width, cp);
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}
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}
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void
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p_flags(int f, const char *format)
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{
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char name[33], *flags;
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const struct bits *p = bits;
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for (flags = name; p->b_mask && flags < &name[sizeof(name) - 2]; p++)
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if (p->b_mask & f)
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*flags++ = p->b_val;
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*flags = '\0';
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printf(format, name);
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}
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static void
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p_tag(const struct sockaddr *sa)
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{
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char *line;
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if (sa == NULL || sa->sa_family != AF_MPLS) {
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printf("%7s", "-");
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return;
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}
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line = mpls_ntoa(sa);
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if (strlen(line) < 7)
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printf("%7s", line);
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else
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printf("%s", line);
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}
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static char line[MAXHOSTNAMELEN];
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static char domain[MAXHOSTNAMELEN];
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char *
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routename(struct sockaddr *sa)
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{
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char *cp = NULL;
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static int first = 1;
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if (first) {
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first = 0;
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if (gethostname(domain, sizeof(domain)) == 0 &&
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(cp = strchr(domain, '.')))
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(void)strlcpy(domain, cp + 1, sizeof(domain));
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else
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domain[0] = '\0';
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cp = NULL;
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}
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if (sa->sa_len == 0) {
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(void)strlcpy(line, "default", sizeof(line));
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return (line);
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}
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switch (sa->sa_family) {
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case AF_INET:
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return
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(routename4(((struct sockaddr_in *)sa)->sin_addr.s_addr));
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case AF_INET6:
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{
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struct sockaddr_in6 sin6;
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memset(&sin6, 0, sizeof(sin6));
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memcpy(&sin6, sa, sa->sa_len);
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sin6.sin6_len = sizeof(struct sockaddr_in6);
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sin6.sin6_family = AF_INET6;
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if (sa->sa_len == sizeof(struct sockaddr_in6) &&
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(IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
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IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) &&
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sin6.sin6_scope_id == 0) {
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sin6.sin6_scope_id =
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ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
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sin6.sin6_addr.s6_addr[2] = 0;
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sin6.sin6_addr.s6_addr[3] = 0;
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}
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return (routename6(&sin6));
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}
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case AF_LINK:
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return (link_print(sa));
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case AF_MPLS:
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return mpls_ntoa(sa);
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#if 0 /* XXX-elad */
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case AF_UNSPEC:
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if (sa->sa_len == sizeof(struct sockaddr_rtlabel)) {
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static char name[RTLABEL_LEN];
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struct sockaddr_rtlabel *sr;
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sr = (struct sockaddr_rtlabel *)sa;
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strlcpy(name, sr->sr_label, sizeof(name));
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return (name);
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}
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/* FALLTHROUGH */
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#endif
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default:
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(void)snprintf(line, sizeof(line), "(%d) %s",
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sa->sa_family, any_ntoa(sa));
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break;
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}
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return (line);
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}
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char *
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routename4(in_addr_t in)
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{
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const char *cp = NULL;
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struct in_addr ina;
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struct hostent *hp;
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if (in == INADDR_ANY)
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cp = "default";
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if (!cp && !nflag) {
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if ((hp = gethostbyaddr((char *)&in,
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sizeof(in), AF_INET)) != NULL) {
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char *p;
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if ((p = strchr(hp->h_name, '.')) &&
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!strcmp(p + 1, domain))
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*p = '\0';
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cp = hp->h_name;
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}
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}
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ina.s_addr = in;
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strlcpy(line, cp ? cp : inet_ntoa(ina), sizeof(line));
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return (line);
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}
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char *
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routename6(struct sockaddr_in6 *sin6)
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{
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int niflags = 0;
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if (nflag)
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niflags |= NI_NUMERICHOST;
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else
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niflags |= NI_NOFQDN;
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if (getnameinfo((struct sockaddr *)sin6, sin6->sin6_len,
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|
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)
|
|
{
|
|
const 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 > (int)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 < (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)) {
|
|
snprintf(line, sizeof(line), "default");
|
|
return (line);
|
|
}
|
|
|
|
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));
|
|
}
|
|
}
|
|
|
|
char *
|
|
mpls_ntoa(const struct sockaddr *sa)
|
|
{
|
|
static char obuf[16];
|
|
const union mpls_shim *pms;
|
|
union mpls_shim ms;
|
|
int psize = sizeof(struct sockaddr_mpls);
|
|
|
|
pms = &((const struct sockaddr_mpls*)sa)->smpls_addr;
|
|
ms.s_addr = ntohl(pms->s_addr);
|
|
|
|
snprintf(obuf, sizeof(obuf), "%u", ms.shim.label);
|
|
|
|
while(psize < sa->sa_len) {
|
|
pms++;
|
|
ms.s_addr = ntohl(pms->s_addr);
|
|
snprintf(obuf, sizeof(obuf), "%s,%u", obuf,
|
|
ms.shim.label);
|
|
psize+=sizeof(ms);
|
|
}
|
|
return obuf;
|
|
}
|