/*      $NetBSD: rtutil.c,v 1.11 2020/08/29 19:27:40 christos 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/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 <netatalk/at.h>
#include <netmpls/mpls.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 "prog_ops.h"
#include "rtutil.h"

#define PLEN    (LONG_BIT / 4 + 2)
#define PFKEYV2_CHUNK sizeof(u_int64_t)
static char *link_print(const struct sockaddr *);

/*
 * 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_CONNECTED, 'C' },
        /* { RTF_XRESOLVE,      'X' }, */
        { RTF_LLDATA,   'L' },
        { RTF_STATIC,   'S' },
        { RTF_PROTO1,   '1' },
        { RTF_PROTO2,   '2' },
        /* { RTF_PROTO3,        '3' }, */
        /* { RTF_CLONED,        'c' }, */
        /* { RTF_JUMBO, 'J' }, */
        { RTF_ANNOUNCE, 'p' },
        { RTF_LOCAL, 'l'},
        { RTF_BROADCAST, 'b'},
        { 0, 0 }
};

#ifndef SMALL
static void p_tag(const struct sockaddr *sa);
#endif
static void p_rtentry(struct rt_msghdr *, int, int);

/*
 * Print routing tables.
 */
void
p_rttables(int paf, int flags, int pflags, int interesting)
{
        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] = paf;
        mib[4] = NET_RT_DUMP;
        mib[5] = 0;
        if (prog_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 (prog_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 ((rtm->rtm_flags & pflags) != pflags)
                                continue;
                        if (paf != AF_UNSPEC && sa->sa_family != paf)
                                continue;
                        p_rtentry(rtm, flags, interesting);
                }
                free(buf);
                buf = NULL;
        }

        if (paf != 0 && paf != PF_KEY)
                return;

#if 0 /* 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 (prog_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 (prog_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 /* 0 */
}

/* 
 * column widths; each followed by one space
 * width of destination/gateway column
 * strlen("fe80::aaaa:bbbb:cccc:dddd@gif0") == 30, strlen("/128") == 4 = 34
 * strlen("aaaa:bbbb:cccc:dddd:eeee:ffff:gggg:hhhh") == 39
 */
#ifndef INET6
#define WID_DST(af)     18      /* width of destination column */
#define WID_GW(af)      18      /* width of gateway column */
#else
#define WID_DST(af)     ((af) == AF_INET6 ? ((flags & RT_NFLAG) ? 39 : 18) : 18)
#define WID_GW(af)      ((af) == AF_INET6 ? ((flags & RT_NFLAG) ? 30 : 18) : 18)
#endif

/*
 * Print header for routing table columns.
 */
void
p_rthdr(int paf, int flags)
{
#ifndef SMALL
        if (flags & RT_AFLAG)
                printf("%-*.*s ", PLEN, PLEN, "Address");
        if (paf == PF_KEY) {
                printf("%-18s %-5s %-18s %-5s %-5s %-22s\n",
                    "Source", "Port", "Destination",
                    "Port", "Proto", "SA(Address/Proto/Type/Direction)");
                return;
        }
        if (flags & RT_TFLAG) {
            printf("%-*.*s %-*.*s %-6.6s %6.6s %8.8s %6.6s %7.7s"
                " %s\n", WID_DST(paf), WID_DST(paf), "Destination",
                WID_GW(paf), WID_GW(paf), "Gateway",
                "Flags", "Refs", "Use", "Mtu", "Tag", "Interface");
            return;
        }
#endif
#ifndef SMALL
        printf("%-*.*s %-*.*s %-6.6s %6.6s %8.8s %6.6s %s\n",
            WID_DST(paf), WID_DST(paf), "Destination",
            WID_GW(paf), WID_GW(paf), "Gateway",
            "Flags", "Refs", "Use", "Mtu", "Interface");
#else
        printf("%-*.*s %-*.*s %-6.6s\n",
            WID_DST(paf), WID_DST(paf), "Destination",
            WID_GW(paf), WID_GW(paf), "Gateway",
            "Flags");
#endif
}

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) +
                            RT_ROUNDUP(sa->sa_len));
                } else
                        rti_info[i] = NULL;
        }
}

/*
 * Print a routing table entry.
 */
static void
p_rtentry(struct rt_msghdr *rtm, int flags, int interesting)
{
        static int       old_af = -1;
        struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
        struct sockaddr *mask, *rti_info[RTAX_MAX];
#ifndef SMALL
        char             ifbuf[IF_NAMESIZE];
#endif

        if ((flags & RT_LFLAG) && (rtm->rtm_flags & RTF_LLDATA))
                return;

        if (old_af != sa->sa_family) {
                old_af = sa->sa_family;
                p_family(sa->sa_family);
                p_rthdr(sa->sa_family, flags);
        }
        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), flags);
        p_sockaddr(rti_info[RTAX_GATEWAY], NULL, RTF_HOST,
            WID_GW(sa->sa_family), flags);
        p_flags(rtm->rtm_flags & interesting);
#if 0 /* XXX-elad */
        printf("%6d %8"PRId64" ", (int)rtm->rtm_rmx.rmx_refcnt,
            rtm->rtm_rmx.rmx_pksent);
#else
        printf("%6s %8s ", "-", "-");
#endif
#ifndef SMALL
        if (rtm->rtm_rmx.rmx_mtu)
                printf("%6"PRId64, rtm->rtm_rmx.rmx_mtu);
        else
                printf("%6s", "-");
        putchar((rtm->rtm_rmx.rmx_locks & RTV_MTU) ? 'L' : ' ');
        if (flags & RT_TFLAG)
                p_tag(rti_info[RTAX_TAG]);
        printf(" %.16s", if_indextoname(rtm->rtm_index, ifbuf));
        putchar('\n');
        if (flags & RT_VFLAG)
                p_rtrmx(&rtm->rtm_rmx);
#else
        putchar('\n');
#endif
}

/*
 * Print address family header before a section of the routing table.
 */
void
p_family(int paf)
{
        const char *afname;

        switch (paf) {
        case AF_INET:
                afname = "Internet";
                break;
#ifdef INET6
        case AF_INET6:
                afname = "Internet6";
                break;
#endif
        case PF_KEY:
                afname = "Encap";
                break;
        case AF_APPLETALK:
                afname = "AppleTalk";
                break;
#ifndef SMALL
        case AF_MPLS:
                afname = "MPLS";
                break;
#endif
        default:
                afname = NULL;
                break;
        }
        if (afname)
                printf("\n%s:\n", afname);
        else
                printf("\nProtocol Family %d:\n", paf);
}

void
p_sockaddr(const struct sockaddr *sa, const struct sockaddr *mask, int rflags,
    int width, int flags)
{
        char *cp;

        switch (sa->sa_family) {
#ifdef INET6
        case AF_INET6:
            {
                struct sockaddr_in6 sa6 = *(const struct sockaddr_in6 *)sa;

                inet6_getscopeid(&sa6, INET6_IS_ADDR_LINKLOCAL|
                    INET6_IS_ADDR_MC_LINKLOCAL);
                if (rflags & RTF_HOST)
                        cp = routename((const struct sockaddr *)&sa6, flags);
                else
                        cp = netname((const struct sockaddr *)&sa6, mask, flags);
                break;
            }
#endif
        default:
                if ((rflags & RTF_HOST) || mask == NULL)
                        cp = routename(sa, flags);
                else
                        cp = netname(sa, mask, flags);
                break;
        }
        if (width < 0)
                printf("%s", cp);
        else {
                if (flags & RT_NFLAG)
                        printf("%-*s ", width, cp);
                else
                        printf("%-*.*s ", width, width, cp);
        }
}

void
p_flags(int f)
{
        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("%-6.6s ", name);
}

#ifndef SMALL
void
p_rtrmx(const struct rt_metrics *rmx)
{
        printf("\texpire   %10"PRId64"%c  recvpipe %10"PRIu64"%c  "
            "sendpipe %10"PRIu64"%c\n",
            (int64_t)rmx->rmx_expire, 
            (rmx->rmx_locks & RTV_EXPIRE) ? 'L' : ' ', rmx->rmx_recvpipe,
            (rmx->rmx_locks & RTV_RPIPE) ? 'L' : ' ', rmx->rmx_sendpipe,
            (rmx->rmx_locks & RTV_SPIPE) ? 'L' : ' ');
        printf("\tssthresh %10"PRIu64"%c  rtt      %10"PRIu64"%c  "
            "rttvar   %10"PRIu64"%c\n", rmx->rmx_ssthresh, 
            (rmx->rmx_locks & RTV_SSTHRESH) ? 'L' : ' ',
            rmx->rmx_rtt, (rmx->rmx_locks & RTV_RTT) ? 'L' : ' ',
            rmx->rmx_rttvar, (rmx->rmx_locks & RTV_RTTVAR) ? 'L' : ' ');
        printf("\thopcount %10"PRIu64"%c\n",
            rmx->rmx_hopcount, (rmx->rmx_locks & RTV_HOPCOUNT) ? 'L' : ' ');
}

static void
p_tag(const struct sockaddr *sa)
{
        char *line;

        if (sa == NULL || sa->sa_family != AF_MPLS) {
                printf("%7s", "-");
                return;
        }
        line = mpls_ntoa(sa);
        if (strlen(line) < 7)
                printf("%7s", line);
        else
                printf("%s", line);
}
#endif

static char line[MAXHOSTNAMELEN];
static char domain[MAXHOSTNAMELEN];

char *
routename(const struct sockaddr *sa, int flags)
{
        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(
                    ((const struct sockaddr_in *)sa)->sin_addr.s_addr,
                    flags);
#ifdef INET6
        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))
                        inet6_getscopeid(&sin6, INET6_IS_ADDR_LINKLOCAL|
                            INET6_IS_ADDR_MC_LINKLOCAL);
                return routename6(&sin6, flags);
            }
#endif
        case AF_LINK:
                return link_print(sa);

#ifndef SMALL
        case AF_MPLS:
                return mpls_ntoa(sa);

        case AF_APPLETALK:
                (void)snprintf(line, sizeof(line), "atalk %d.%d",
                    ((const struct sockaddr_at *)sa)->sat_addr.s_net,
                    ((const struct sockaddr_at *)sa)->sat_addr.s_node);
                break;
#endif

#if 0 /* 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, int flags)
{
        const char      *cp = NULL;
        struct in_addr   ina;
        struct hostent  *hp;

        if (in == INADDR_ANY)
                cp = "default";
        if (!cp && (flags & RT_NFLAG) == 0) {
                if ((hp = gethostbyaddr((char *)&in,
                    sizeof(in), AF_INET)) != NULL) {
                        char *p;
                        if ((p = strchr(hp->h_name, '.')) &&
                            !strcmp(p + 1, domain))
                                *p = '\0';
                        cp = hp->h_name;
                }
        }
        ina.s_addr = in;
        strlcpy(line, cp ? cp : inet_ntoa(ina), sizeof(line));

        return (line);
}

#ifdef INET6
char *
routename6(const struct sockaddr_in6 *sin6, int flags)
{
        int      niflags = 0;

        if ((flags & RT_NFLAG))
                niflags |= NI_NUMERICHOST;
        else
                niflags |= NI_NOFQDN;

        if (getnameinfo((const struct sockaddr *)sin6, sin6->sin6_len,
            line, sizeof(line), NULL, 0, niflags) != 0)
                strncpy(line, "invalid", sizeof(line));

        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 *
netname4(const struct sockaddr_in* sa4, const struct sockaddr_in *mask, int flags)
{
        const char *cp = NULL;
        struct netent *np = NULL;
        int mbits;
        in_addr_t in = sa4->sin_addr.s_addr;

        if (mask) {
                in_addr_t m = mask->sin_addr.s_addr ;
                m = ntohl(m);
                mbits = m ? 33 - ffs(m) : 0;
        } else
                mbits = 0;

        in = ntohl(in);
        if (in == INADDR_ANY && !mbits)
                cp = "default";
        else if (!(flags & RT_NFLAG) && in != INADDR_ANY) {
                if ((np = getnetbyaddr(in, AF_INET)) != NULL)
                        cp = np->n_name;
        }
        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(const struct sockaddr_in6 *sa6, const struct sockaddr_in6 *mask, int flags)
{
        struct sockaddr_in6 sin6;
        const 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 = (const 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 (flags & RT_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(const struct sockaddr *sa, const struct sockaddr *mask, int flags)
{
        switch (sa->sa_family) {

        case AF_INET:
                return netname4((const struct sockaddr_in *)sa,
                    (const struct sockaddr_in *)mask, flags);
#ifdef INET6
        case AF_INET6:
                return netname6((const struct sockaddr_in6 *)sa,
                    (const struct sockaddr_in6 *)mask, flags);
#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);
}

static char *
link_print(const struct sockaddr *sa)
{
        const struct sockaddr_dl *sdl = (const struct sockaddr_dl *)sa;
        const u_char *lla = (const 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((const struct ether_addr *)lla);
        default:
                return link_ntoa(sdl);
        }
}

#ifndef SMALL
char *
mpls_ntoa(const struct sockaddr *sa)
{
        static char obuf[16];
        size_t olen;
        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);
                olen = strlen(obuf);
                snprintf(obuf + olen, sizeof(obuf) - olen, ",%u",
                    ms.shim.label);
                psize+=sizeof(ms);
        }
        return obuf;
}
#endif

void
p_addr(const struct sockaddr *sa, const struct sockaddr *mask, int rflags, int flags)
{
        p_sockaddr(sa, mask, rflags, WID_DST(sa->sa_family), flags);
}

void
p_gwaddr(const struct sockaddr *sa, int gwaf, int flags)
{
        p_sockaddr(sa, 0, RTF_HOST, WID_GW(gwaf), flags);
}