root/usr.sbin/ospf6ctl/ospf6ctl.c
/*      $OpenBSD: ospf6ctl.c,v 1.59 2024/11/21 13:38:14 claudio Exp $ */

/*
 * Copyright (c) 2005 Claudio Jeker <claudio@openbsd.org>
 * Copyright (c) 2004, 2005 Esben Norby <norby@openbsd.org>
 * Copyright (c) 2003 Henning Brauer <henning@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <net/if_media.h>
#include <net/if_types.h>

#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "ospf6.h"
#include "ospf6d.h"
#include "ospfe.h"
#include "parser.h"
#include "log.h"

__dead void      usage(void);
int              show_summary_msg(struct imsg *);
uint64_t         get_ifms_type(uint8_t);
int              show_interface_msg(struct imsg *);
int              show_interface_detail_msg(struct imsg *);
const char      *print_link(int);
const char      *fmt_timeframe(time_t t);
const char      *fmt_timeframe_core(time_t t);
const char      *log_id(u_int32_t );
const char      *log_adv_rtr(u_int32_t);
void             show_database_head(struct in_addr, char *, u_int16_t);
int              show_database_msg(struct imsg *);
char            *print_ls_type(u_int16_t);
void             show_db_hdr_msg_detail(struct lsa_hdr *);
char            *print_rtr_link_type(u_int8_t);
const char      *print_ospf_flags(u_int8_t);
const char      *print_asext_flags(u_int32_t);
const char      *print_prefix_opt(u_int8_t);
int              show_db_msg_detail(struct imsg *imsg);
int              show_nbr_msg(struct imsg *);
const char      *print_ospf_options(u_int32_t);
int              show_nbr_detail_msg(struct imsg *);
int              show_rib_msg(struct imsg *);
void             show_rib_head(struct in_addr, u_int8_t, u_int8_t);
const char      *print_ospf_rtr_flags(u_int8_t);
int              show_rib_detail_msg(struct imsg *);
void             show_fib_head(void);
int              show_fib_msg(struct imsg *);
const char *     get_media_descr(uint64_t);
const char *     get_linkstate(uint8_t, int);
void             print_baudrate(u_int64_t);

struct imsgbuf  *ibuf;

__dead void
usage(void)
{
        extern char *__progname;

        fprintf(stderr, "usage: %s [-s socket] command [argument ...]\n",
            __progname);
        exit(1);
}

int
main(int argc, char *argv[])
{
        struct sockaddr_un       sun;
        struct parse_result     *res;
        struct imsg              imsg;
        unsigned int             ifidx = 0;
        int                      ctl_sock, r;
        int                      done = 0, verbose = 0;
        int                      n;
        int                      ch;
        char                    *sockname;

        r = getrtable();
        if (asprintf(&sockname, "%s.%d", OSPF6D_SOCKET, r) == -1)
                err(1, "asprintf");

        while ((ch = getopt(argc, argv, "s:")) != -1) {
                switch (ch) {
                case 's':
                        sockname = optarg;
                        break;
                default:
                        usage();
                        /* NOTREACHED */
                }
        }
        argc -= optind;
        argv += optind;

        /* parse options */
        if ((res = parse(argc, argv)) == NULL)
                exit(1);

        /* connect to ospf6d control socket */
        if ((ctl_sock = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
                err(1, "socket");

        bzero(&sun, sizeof(sun));
        sun.sun_family = AF_UNIX;
        strlcpy(sun.sun_path, sockname, sizeof(sun.sun_path));
        if (connect(ctl_sock, (struct sockaddr *)&sun, sizeof(sun)) == -1)
                err(1, "connect: %s", sockname);

        if (pledge("stdio", NULL) == -1)
                err(1, "pledge");

        if ((ibuf = malloc(sizeof(struct imsgbuf))) == NULL)
                err(1, NULL);
        if (imsgbuf_init(ibuf, ctl_sock) == -1)
                err(1, NULL);
        done = 0;

        /* process user request */
        switch (res->action) {
        case NONE:
                usage();
                /* not reached */
        case SHOW:
        case SHOW_SUM:
                imsg_compose(ibuf, IMSG_CTL_SHOW_SUM, 0, 0, -1, NULL, 0);
                break;
        case SHOW_IFACE:
                printf("%-11s %-29s %-6s %-10s %-10s %-8s\n",
                    "Interface", "Address", "State", "HelloTimer", "Linkstate",
                    "Uptime");
                /*FALLTHROUGH*/
        case SHOW_IFACE_DTAIL:
                if (*res->ifname) {
                        ifidx = if_nametoindex(res->ifname);
                        if (ifidx == 0)
                                errx(1, "no such interface %s", res->ifname);
                }
                imsg_compose(ibuf, IMSG_CTL_SHOW_INTERFACE, 0, 0, -1,
                    &ifidx, sizeof(ifidx));
                break;
        case SHOW_NBR:
                printf("%-15s %-3s %-12s %-9s %-11s %s\n", "ID", "Pri",
                    "State", "DeadTime", "Iface","Uptime");
                /*FALLTHROUGH*/
        case SHOW_NBR_DTAIL:
                imsg_compose(ibuf, IMSG_CTL_SHOW_NBR, 0, 0, -1, NULL, 0);
                break;
        case SHOW_DB:
                imsg_compose(ibuf, IMSG_CTL_SHOW_DATABASE, 0, 0, -1, NULL, 0);
                break;
        case SHOW_DBBYAREA:
                imsg_compose(ibuf, IMSG_CTL_SHOW_DATABASE, 0, 0, -1,
                    &res->area, sizeof(res->area));
                break;
        case SHOW_DBEXT:
                imsg_compose(ibuf, IMSG_CTL_SHOW_DB_EXT, 0, 0, -1, NULL, 0);
                break;
        case SHOW_DBLINK:
                imsg_compose(ibuf, IMSG_CTL_SHOW_DB_LINK, 0, 0, -1, NULL, 0);
                break;
        case SHOW_DBNET:
                imsg_compose(ibuf, IMSG_CTL_SHOW_DB_NET, 0, 0, -1, NULL, 0);
                break;
        case SHOW_DBRTR:
                imsg_compose(ibuf, IMSG_CTL_SHOW_DB_RTR, 0, 0, -1, NULL, 0);
                break;
        case SHOW_DBINTRA:
                imsg_compose(ibuf, IMSG_CTL_SHOW_DB_INTRA, 0, 0, -1, NULL, 0);
                break;
        case SHOW_DBSELF:
                imsg_compose(ibuf, IMSG_CTL_SHOW_DB_SELF, 0, 0, -1, NULL, 0);
                break;
        case SHOW_DBSUM:
                imsg_compose(ibuf, IMSG_CTL_SHOW_DB_SUM, 0, 0, -1, NULL, 0);
                break;
        case SHOW_DBASBR:
                imsg_compose(ibuf, IMSG_CTL_SHOW_DB_ASBR, 0, 0, -1, NULL, 0);
                break;
        case SHOW_RIB:
                printf("%-20s %-17s %-12s %-9s %-7s %-8s\n", "Destination",
                    "Nexthop", "Path Type", "Type", "Cost", "Uptime");
                /*FALLTHROUGH*/
        case SHOW_RIB_DTAIL:
                imsg_compose(ibuf, IMSG_CTL_SHOW_RIB, 0, 0, -1, NULL, 0);
                break;
        case SHOW_FIB:
                if (IN6_IS_ADDR_UNSPECIFIED(&res->addr))
                        imsg_compose(ibuf, IMSG_CTL_KROUTE, 0, 0, -1,
                            &res->flags, sizeof(res->flags));
                else
                        imsg_compose(ibuf, IMSG_CTL_KROUTE_ADDR, 0, 0, -1,
                            &res->addr, sizeof(res->addr));
                show_fib_head();
                break;
        case FIB:
                errx(1, "fib couple|decouple");
                break;
        case FIB_COUPLE:
                imsg_compose(ibuf, IMSG_CTL_FIB_COUPLE, 0, 0, -1, NULL, 0);
                printf("couple request sent.\n");
                done = 1;
                break;
        case FIB_DECOUPLE:
                imsg_compose(ibuf, IMSG_CTL_FIB_DECOUPLE, 0, 0, -1, NULL, 0);
                printf("decouple request sent.\n");
                done = 1;
                break;
        case FIB_RELOAD:
                imsg_compose(ibuf, IMSG_CTL_FIB_RELOAD, 0, 0, -1, NULL, 0);
                printf("reload request sent.\n");
                done = 1;
                break;
        case LOG_VERBOSE:
                verbose = 1;
                /* FALLTHROUGH */
        case LOG_BRIEF:
                imsg_compose(ibuf, IMSG_CTL_LOG_VERBOSE, 0, 0, -1,
                    &verbose, sizeof(verbose));
                printf("logging request sent.\n");
                done = 1;
                break;
        case RELOAD:
#ifdef notyet
                imsg_compose(ibuf, IMSG_CTL_RELOAD, 0, 0, -1, NULL, 0);
                printf("reload request sent.\n");
                done = 1;
                break;
#else
                errx(1, "reload not supported");
#endif
        }

        if (imsgbuf_flush(ibuf) == -1)
                err(1, "write error");

        while (!done) {
                if ((n = imsgbuf_read(ibuf)) == -1)
                        err(1, "read error");
                if (n == 0)
                        errx(1, "pipe closed");

                while (!done) {
                        if ((n = imsg_get(ibuf, &imsg)) == -1)
                                errx(1, "imsg_get error");
                        if (n == 0)
                                break;
                        switch (res->action) {
                        case SHOW:
                        case SHOW_SUM:
                                done = show_summary_msg(&imsg);
                                break;
                        case SHOW_IFACE:
                                done = show_interface_msg(&imsg);
                                break;
                        case SHOW_IFACE_DTAIL:
                                done = show_interface_detail_msg(&imsg);
                                break;
                        case SHOW_NBR:
                                done = show_nbr_msg(&imsg);
                                break;
                        case SHOW_NBR_DTAIL:
                                done = show_nbr_detail_msg(&imsg);
                                break;
                        case SHOW_DB:
                        case SHOW_DBBYAREA:
                        case SHOW_DBSELF:
                                done = show_database_msg(&imsg);
                                break;
                        case SHOW_DBEXT:
                        case SHOW_DBLINK:
                        case SHOW_DBNET:
                        case SHOW_DBRTR:
                        case SHOW_DBINTRA:
                        case SHOW_DBSUM:
                        case SHOW_DBASBR:
                                done = show_db_msg_detail(&imsg);
                                break;
                        case SHOW_RIB:
                                done = show_rib_msg(&imsg);
                                break;
                        case SHOW_RIB_DTAIL:
                                done = show_rib_detail_msg(&imsg);
                                break;
                        case SHOW_FIB:
                                done = show_fib_msg(&imsg);
                                break;
                        case NONE:
                        case FIB:
                        case FIB_COUPLE:
                        case FIB_DECOUPLE:
                        case FIB_RELOAD:
                        case LOG_VERBOSE:
                        case LOG_BRIEF:
                        case RELOAD:
                                break;
                        }
                        imsg_free(&imsg);
                }
        }
        close(ctl_sock);
        free(ibuf);

        return (0);
}

int
show_summary_msg(struct imsg *imsg)
{
        struct ctl_sum          *sum;
        struct ctl_sum_area     *sumarea;

        switch (imsg->hdr.type) {
        case IMSG_CTL_SHOW_SUM:
                sum = imsg->data;
                printf("Router ID: %s\n", inet_ntoa(sum->rtr_id));
                printf("Uptime: %s\n", fmt_timeframe_core(sum->uptime));

                printf("SPF delay is %d sec(s), hold time between two SPFs "
                    "is %d sec(s)\n", sum->spf_delay, sum->spf_hold_time);
                printf("Number of external LSA(s) %d\n", sum->num_ext_lsa);
                printf("Number of areas attached to this router: %d\n",
                    sum->num_area);
                break;
        case IMSG_CTL_SHOW_SUM_AREA:
                sumarea = imsg->data;
                printf("\nArea ID: %s\n", inet_ntoa(sumarea->area));
                printf("  Number of interfaces in this area: %d\n",
                    sumarea->num_iface);
                printf("  Number of fully adjacent neighbors in this "
                    "area: %d\n", sumarea->num_adj_nbr);
                printf("  SPF algorithm executed %d time(s)\n",
                    sumarea->num_spf_calc);
                printf("  Number LSA(s) %d\n", sumarea->num_lsa);
                break;
        case IMSG_CTL_END:
                printf("\n");
                return (1);
        default:
                break;
        }

        return (0);
}

uint64_t
get_ifms_type(uint8_t if_type)
{
        switch (if_type) {
        case IFT_ETHER:
                return (IFM_ETHER);
        case IFT_FDDI:
                return (IFM_FDDI);
        case IFT_CARP:
                return (IFM_CARP);
        case IFT_PPP:
                return (IFM_TDM);
        default:
                return (0);
        }
}

int
show_interface_msg(struct imsg *imsg)
{
        struct ctl_iface        *iface;
        char                    *netid;

        switch (imsg->hdr.type) {
        case IMSG_CTL_SHOW_INTERFACE:
                iface = imsg->data;

                if (asprintf(&netid, "%s", log_in6addr(&iface->addr)) == -1)
                        err(1, NULL);
                printf("%-11s %-29s %-6s %-10s %-10s %s\n",
                    iface->name, netid, if_state_name(iface->state),
                    iface->hello_timer < 0 ? "-" :
                    fmt_timeframe_core(iface->hello_timer),
                    get_linkstate(iface->if_type, iface->linkstate),
                    fmt_timeframe_core(iface->uptime));
                free(netid);
                break;
        case IMSG_CTL_END:
                printf("\n");
                return (1);
        default:
                break;
        }

        return (0);
}

int
show_interface_detail_msg(struct imsg *imsg)
{
        struct ctl_iface        *iface;

        switch (imsg->hdr.type) {
        case IMSG_CTL_SHOW_INTERFACE:
                iface = imsg->data;
                printf("\n");
                printf("Interface %s, line protocol is %s\n",
                    iface->name, print_link(iface->flags));
                printf("  Internet address %s Area %s\n",
                    log_in6addr(&iface->addr), inet_ntoa(iface->area));
                printf("  Link type %s, state %s, mtu %d",
                    get_media_descr(get_ifms_type(iface->if_type)),
                    get_linkstate(iface->if_type, iface->linkstate),
                    iface->mtu);
                if (iface->linkstate != LINK_STATE_DOWN &&
                    iface->baudrate > 0) {
                    printf(", ");
                    print_baudrate(iface->baudrate);
                }
                printf("\n");
                printf("  Router ID %s, network type %s, cost: %d\n",
                    inet_ntoa(iface->rtr_id),
                    if_type_name(iface->type), iface->metric);
                printf("  Transmit delay is %d sec(s), state %s, priority %d\n",
                    iface->transmit_delay, if_state_name(iface->state),
                    iface->priority);
                printf("  Designated Router (ID) %s\n",
                    inet_ntoa(iface->dr_id));
                printf("    Interface address %s\n",
                    log_in6addr(&iface->dr_addr));
                printf("  Backup Designated Router (ID) %s\n",
                    inet_ntoa(iface->bdr_id));
                printf("    Interface address %s\n",
                    log_in6addr(&iface->bdr_addr));
                printf("  Timer intervals configured, "
                    "hello %d, dead %d, wait %d, retransmit %d\n",
                     iface->hello_interval, iface->dead_interval,
                     iface->dead_interval, iface->rxmt_interval);
                if (iface->passive)
                        printf("    Passive interface (No Hellos)\n");
                else if (iface->hello_timer < 0)
                        printf("    Hello timer not running\n");
                else
                        printf("    Hello timer due in %s\n",
                            fmt_timeframe_core(iface->hello_timer));
                printf("    Uptime %s\n", fmt_timeframe_core(iface->uptime));
                printf("  Neighbor count is %d, adjacent neighbor count is "
                    "%d\n", iface->nbr_cnt, iface->adj_cnt);
                break;
        case IMSG_CTL_END:
                printf("\n");
                return (1);
        default:
                break;
        }

        return (0);
}

const char *
print_link(int state)
{
        if (state & IFF_UP)
                return ("UP");
        else
                return ("DOWN");
}

#define TF_BUFS 8
#define TF_LEN  9

const char *
fmt_timeframe(time_t t)
{
        if (t == 0)
                return ("Never");
        else
                return (fmt_timeframe_core(time(NULL) - t));
}

const char *
fmt_timeframe_core(time_t t)
{
        char            *buf;
        static char      tfbuf[TF_BUFS][TF_LEN];        /* ring buffer */
        static int       idx = 0;
        unsigned int     sec, min, hrs, day, week;

        if (t == 0)
                return ("00:00:00");

        buf = tfbuf[idx++];
        if (idx == TF_BUFS)
                idx = 0;

        week = t;

        sec = week % 60;
        week /= 60;
        min = week % 60;
        week /= 60;
        hrs = week % 24;
        week /= 24;
        day = week % 7;
        week /= 7;

        if (week > 0)
                snprintf(buf, TF_LEN, "%02uw%01ud%02uh", week, day, hrs);
        else if (day > 0)
                snprintf(buf, TF_LEN, "%01ud%02uh%02um", day, hrs, min);
        else
                snprintf(buf, TF_LEN, "%02u:%02u:%02u", hrs, min, sec);

        return (buf);
}

const char *
log_id(u_int32_t id)
{
        static char     buf[48];
        struct in_addr  addr;

        addr.s_addr = id;

        if (inet_ntop(AF_INET, &addr, buf, sizeof(buf)) == NULL)
                return ("?");
        else
                return (buf);
}

const char *
log_adv_rtr(u_int32_t adv_rtr)
{
        static char     buf[48];
        struct in_addr  addr;

        addr.s_addr = adv_rtr;

        if (inet_ntop(AF_INET, &addr, buf, sizeof(buf)) == NULL)
                return ("?");
        else
                return (buf);
}

void
show_database_head(struct in_addr aid, char *ifname, u_int16_t type)
{
        char    *header, *format;
        int     cleanup = 0;

        switch (ntohs(type)) {
        case LSA_TYPE_LINK:
                format = "Link (Type-8) Link States";
                break;
        case LSA_TYPE_ROUTER:
                format = "Router Link States";
                break;
        case LSA_TYPE_NETWORK:
                format = "Net Link States";
                break;
        case LSA_TYPE_INTER_A_PREFIX:
                format = "Inter Area Prefix Link States";
                break;
        case LSA_TYPE_INTER_A_ROUTER:
                format = "Inter Area Router Link States";
                break;
        case LSA_TYPE_INTRA_A_PREFIX:
                format = "Intra Area Prefix Link States";
                break;
        case LSA_TYPE_EXTERNAL:
                printf("\n%-15s %s\n\n", "", "Type-5 AS External Link States");
                return;
        default:
                if (asprintf(&format, "LSA type %x", ntohs(type)) == -1)
                        err(1, NULL);
                cleanup = 1;
                break;
        }
        if (LSA_IS_SCOPE_AREA(ntohs(type))) {
                if (asprintf(&header, "%s (Area %s)", format,
                    inet_ntoa(aid)) == -1)
                        err(1, NULL);
        } else if (LSA_IS_SCOPE_LLOCAL(ntohs(type))) {
                if (asprintf(&header, "%s (Area %s Interface %s)", format,
                    inet_ntoa(aid), ifname) == -1)
                        err(1, NULL);
        } else {
                if (asprintf(&header, "%s", format) == -1)
                        err(1, NULL);
        }

        printf("\n%-15s %s\n\n", "", header);
        free(header);
        if (cleanup)
                free(format);
}

int
show_database_msg(struct imsg *imsg)
{
        static struct in_addr    area_id;
        static char              ifname[IF_NAMESIZE];
        static u_int16_t         lasttype;
        struct area             *area;
        struct iface            *iface;
        struct lsa_hdr          *lsa;

        switch (imsg->hdr.type) {
        case IMSG_CTL_SHOW_DATABASE:
        case IMSG_CTL_SHOW_DB_SELF:
                lsa = imsg->data;
                if (lsa->type != lasttype) {
                        show_database_head(area_id, ifname, lsa->type);
                        printf("%-15s %-15s %-4s %-10s %-8s\n", "Link ID",
                            "Adv Router", "Age", "Seq#", "Checksum");
                }
                printf("%-15s %-15s %-4d 0x%08x 0x%04x\n",
                    log_id(lsa->ls_id), log_adv_rtr(lsa->adv_rtr),
                    ntohs(lsa->age), ntohl(lsa->seq_num),
                    ntohs(lsa->ls_chksum));
                lasttype = lsa->type;
                break;
        case IMSG_CTL_AREA:
                area = imsg->data;
                area_id = area->id;
                lasttype = 0;
                break;
        case IMSG_CTL_IFACE:
                iface = imsg->data;
                strlcpy(ifname, iface->name, sizeof(ifname));
                lasttype = 0;
                break;
        case IMSG_CTL_END:
                printf("\n");
                return (1);
        default:
                break;
        }

        return (0);
}

char *
print_ls_type(u_int16_t type)
{
        switch (ntohs(type)) {
        case LSA_TYPE_LINK:
                return ("Link");
        case LSA_TYPE_ROUTER:
                return ("Router");
        case LSA_TYPE_NETWORK:
                return ("Network");
        case LSA_TYPE_INTER_A_PREFIX:
                return ("Inter Area (Prefix)");
        case LSA_TYPE_INTER_A_ROUTER:
                return ("Inter Area (Router)");
        case LSA_TYPE_INTRA_A_PREFIX:
                return ("Intra Area (Prefix)");
        case LSA_TYPE_EXTERNAL:
                return ("AS External");
        default:
                return ("Unknown");
        }
}

void
show_db_hdr_msg_detail(struct lsa_hdr *lsa)
{
        printf("LS age: %d\n", ntohs(lsa->age));
        printf("LS Type: %s\n", print_ls_type(lsa->type));

        switch (ntohs(lsa->type)) {
        case LSA_TYPE_ROUTER:
        case LSA_TYPE_INTER_A_PREFIX:
        case LSA_TYPE_INTER_A_ROUTER:
        case LSA_TYPE_INTRA_A_PREFIX:
        case LSA_TYPE_EXTERNAL:
                printf("Link State ID: %s\n", log_id(lsa->ls_id));
                break;
        case LSA_TYPE_LINK:
                printf("Link State ID: %s (Interface ID of Advertising "
                    "Router)\n", log_id(lsa->ls_id));
                break;
        case LSA_TYPE_NETWORK:
                printf("Link State ID: %s (Interface ID of Designated "
                    "Router)\n", log_id(lsa->ls_id));
                break;
        }

        printf("Advertising Router: %s\n", log_adv_rtr(lsa->adv_rtr));
        printf("LS Seq Number: 0x%08x\n", ntohl(lsa->seq_num));
        printf("Checksum: 0x%04x\n", ntohs(lsa->ls_chksum));
        printf("Length: %d\n", ntohs(lsa->len));
}

char *
print_rtr_link_type(u_int8_t type)
{
        switch (type) {
        case LINK_TYPE_POINTTOPOINT:
                return ("Point-to-Point");
        case LINK_TYPE_TRANSIT_NET:
                return ("Transit Network");
        case LINK_TYPE_RESERVED:
                return ("Reserved");
        case LINK_TYPE_VIRTUAL:
                return ("Virtual Link");
        default:
                return ("Unknown");
        }
}

const char *
print_ospf_flags(u_int8_t opts)
{
        static char     optbuf[32];

        snprintf(optbuf, sizeof(optbuf), "*|*|*|*|*|%s|%s|%s",
            opts & OSPF_RTR_V ? "V" : "-",
            opts & OSPF_RTR_E ? "E" : "-",
            opts & OSPF_RTR_B ? "B" : "-");
        return (optbuf);
}

const char *
print_asext_flags(u_int32_t opts)
{
        static char     optbuf[32];

        snprintf(optbuf, sizeof(optbuf), "*|*|*|*|*|%s|%s|%s",
            opts & LSA_ASEXT_E_FLAG ? "E" : "-",
            opts & LSA_ASEXT_F_FLAG ? "F" : "-",
            opts & LSA_ASEXT_T_FLAG ? "T" : "-");
        return (optbuf);
}

const char *
print_prefix_opt(u_int8_t opts)
{
        static char     optbuf[32];

        if (opts) {
                snprintf(optbuf, sizeof(optbuf),
                    " Options: *|*|*|%s|%s|x|%s|%s",
                    opts & OSPF_PREFIX_DN ? "DN" : "-",
                    opts & OSPF_PREFIX_P ? "P" : "-",
                    opts & OSPF_PREFIX_LA ? "LA" : "-",
                    opts & OSPF_PREFIX_NU ? "NU" : "-");
                return (optbuf);
        }
        return ("");
}

int
show_db_msg_detail(struct imsg *imsg)
{
        static struct in_addr    area_id;
        static char              ifname[IF_NAMESIZE];
        static u_int16_t         lasttype;
        struct in6_addr          ia6;
        struct in_addr           addr, data;
        struct area             *area;
        struct iface            *iface;
        struct lsa              *lsa;
        struct lsa_rtr_link     *rtr_link;
        struct lsa_net_link     *net_link;
        struct lsa_prefix       *prefix;
        struct lsa_asext        *asext;
        u_int32_t                ext_tag;
        u_int16_t                i, nlinks, off;

        /* XXX sanity checks! */

        switch (imsg->hdr.type) {
        case IMSG_CTL_SHOW_DB_EXT:
                lsa = imsg->data;
                if (lsa->hdr.type != lasttype)
                        show_database_head(area_id, ifname, lsa->hdr.type);
                show_db_hdr_msg_detail(&lsa->hdr);

                asext = (struct lsa_asext *)((char *)lsa + sizeof(lsa->hdr));

                printf("    Flags: %s\n",
                    print_asext_flags(ntohl(lsa->data.asext.metric)));
                printf("    Metric: %d Type: ", ntohl(asext->metric)
                    & LSA_METRIC_MASK);
                if (ntohl(lsa->data.asext.metric) & LSA_ASEXT_E_FLAG)
                        printf("2\n");
                else
                        printf("1\n");

                prefix = &asext->prefix;
                bzero(&ia6, sizeof(ia6));
                bcopy(prefix + 1, &ia6, LSA_PREFIXSIZE(prefix->prefixlen));
                printf("    Prefix: %s/%d%s\n", log_in6addr(&ia6),
                    prefix->prefixlen, print_prefix_opt(prefix->options));

                off = sizeof(*asext) + LSA_PREFIXSIZE(prefix->prefixlen);
                if (ntohl(lsa->data.asext.metric) & LSA_ASEXT_F_FLAG) {
                        bcopy((char *)asext + off, &ia6, sizeof(ia6));
                        printf("    Forwarding Address: %s\n",
                            log_in6addr(&ia6));
                        off += sizeof(ia6);
                }
                if (ntohl(lsa->data.asext.metric) & LSA_ASEXT_T_FLAG) {
                        bcopy((char *)asext + off, &ext_tag, sizeof(ext_tag));
                        printf("    External Route Tag: %d\n", ntohl(ext_tag));
                }
                printf("\n");
                lasttype = lsa->hdr.type;
                break;
        case IMSG_CTL_SHOW_DB_LINK:
                lsa = imsg->data;
                if (lsa->hdr.type != lasttype)
                        show_database_head(area_id, ifname, lsa->hdr.type);
                show_db_hdr_msg_detail(&lsa->hdr);
                printf("Options: %s\n", print_ospf_options(LSA_24_GETLO(
                    ntohl(lsa->data.link.opts))));
                printf("Link Local Address: %s\n",
                    log_in6addr(&lsa->data.link.lladdr));

                nlinks = ntohl(lsa->data.link.numprefix);
                printf("Number of Prefixes: %d\n", nlinks);
                off = sizeof(lsa->hdr) + sizeof(struct lsa_link);

                for (i = 0; i < nlinks; i++) {
                        prefix = (struct lsa_prefix *)((char *)lsa + off);
                        bzero(&ia6, sizeof(ia6));
                        bcopy(prefix + 1, &ia6,
                            LSA_PREFIXSIZE(prefix->prefixlen));

                        printf("    Prefix: %s/%d%s\n", log_in6addr(&ia6),
                            prefix->prefixlen,
                            print_prefix_opt(prefix->options));

                        off += sizeof(struct lsa_prefix)
                            + LSA_PREFIXSIZE(prefix->prefixlen);
                }

                printf("\n");
                lasttype = lsa->hdr.type;
                break;
        case IMSG_CTL_SHOW_DB_NET:
                lsa = imsg->data;
                if (lsa->hdr.type != lasttype)
                        show_database_head(area_id, ifname, lsa->hdr.type);
                show_db_hdr_msg_detail(&lsa->hdr);
                printf("Options: %s\n",
                    print_ospf_options(LSA_24_GETLO(ntohl(lsa->data.net.opts))));

                nlinks = (ntohs(lsa->hdr.len) - sizeof(struct lsa_hdr) -
                    sizeof(struct lsa_net)) / sizeof(struct lsa_net_link);
                net_link = (struct lsa_net_link *)((char *)lsa +
                    sizeof(lsa->hdr) + sizeof(lsa->data.net));
                printf("Number of Routers: %d\n", nlinks);

                for (i = 0; i < nlinks; i++) {
                        addr.s_addr = net_link->att_rtr;
                        printf("    Attached Router: %s\n", inet_ntoa(addr));
                        net_link++;
                }

                printf("\n");
                lasttype = lsa->hdr.type;
                break;
        case IMSG_CTL_SHOW_DB_RTR:
                lsa = imsg->data;
                if (lsa->hdr.type != lasttype)
                        show_database_head(area_id, ifname, lsa->hdr.type);
                show_db_hdr_msg_detail(&lsa->hdr);
                printf("Flags: %s\n",
                    print_ospf_flags(LSA_24_GETHI(ntohl(lsa->data.rtr.opts))));
                printf("Options: %s\n",
                    print_ospf_options(LSA_24_GETLO(ntohl(lsa->data.rtr.opts))));

                nlinks = (ntohs(lsa->hdr.len) - sizeof(struct lsa_hdr)
                    - sizeof(u_int32_t)) / sizeof(struct lsa_rtr_link);
                printf("Number of Links: %d\n\n", nlinks);

                off = sizeof(lsa->hdr) + sizeof(struct lsa_rtr);

                for (i = 0; i < nlinks; i++) {
                        rtr_link = (struct lsa_rtr_link *)((char *)lsa + off);

                        printf("    Link (Interface ID %s) connected to: %s\n",
                            log_id(rtr_link->iface_id),
                            print_rtr_link_type(rtr_link->type));

                        addr.s_addr = rtr_link->nbr_rtr_id;
                        data.s_addr = rtr_link->nbr_iface_id;

                        switch (rtr_link->type) {
                        case LINK_TYPE_POINTTOPOINT:
                        case LINK_TYPE_VIRTUAL:
                                printf("    Router ID: %s\n", inet_ntoa(addr));
                                printf("    Interface ID: %s\n",
                                    inet_ntoa(data));
                                break;
                        case LINK_TYPE_TRANSIT_NET:
                                printf("    Designated Router ID: %s\n",
                                    inet_ntoa(addr));
                                printf("    DR Interface ID: %s\n",
                                    inet_ntoa(data));
                                break;
                        default:
                                printf("    Link ID (Unknown type %d): %s\n",
                                    rtr_link->type, inet_ntoa(addr));
                                printf("    Link Data (Unknown): %s\n",
                                    inet_ntoa(data));
                                break;
                        }

                        printf("    Metric: %d\n\n", ntohs(rtr_link->metric));

                        off += sizeof(struct lsa_rtr_link);
                }

                lasttype = lsa->hdr.type;
                break;
        case IMSG_CTL_SHOW_DB_INTRA:
                lsa = imsg->data;
                if (lsa->hdr.type != lasttype)
                        show_database_head(area_id, ifname, lsa->hdr.type);
                show_db_hdr_msg_detail(&lsa->hdr);
                printf("Referenced LS Type: %s\n",
                    print_ls_type(lsa->data.pref_intra.ref_type));
                addr.s_addr = lsa->data.pref_intra.ref_ls_id;
                printf("Referenced Link State ID: %s\n", inet_ntoa(addr));
                addr.s_addr = lsa->data.pref_intra.ref_adv_rtr;
                printf("Referenced Advertising Router: %s\n", inet_ntoa(addr));
                nlinks = ntohs(lsa->data.pref_intra.numprefix);
                printf("Number of Prefixes: %d\n", nlinks);

                off = sizeof(lsa->hdr) + sizeof(struct lsa_intra_prefix);

                for (i = 0; i < nlinks; i++) {
                        prefix = (struct lsa_prefix *)((char *)lsa + off);
                        bzero(&ia6, sizeof(ia6));
                        bcopy(prefix + 1, &ia6,
                            LSA_PREFIXSIZE(prefix->prefixlen));

                        printf("    Prefix: %s/%d%s Metric: %d\n",
                            log_in6addr(&ia6), prefix->prefixlen,
                            print_prefix_opt(prefix->options),
                            ntohs(prefix->metric));

                        off += sizeof(struct lsa_prefix)
                            + LSA_PREFIXSIZE(prefix->prefixlen);
                }

                printf("\n");
                lasttype = lsa->hdr.type;
                break;
        case IMSG_CTL_SHOW_DB_SUM:
                lsa = imsg->data;
                if (lsa->hdr.type != lasttype)
                        show_database_head(area_id, ifname, lsa->hdr.type);
                show_db_hdr_msg_detail(&lsa->hdr);
                printf("Prefix: XXX\n");
                printf("Metric: %d\n", ntohl(lsa->data.pref_sum.metric) &
                    LSA_METRIC_MASK);
                lasttype = lsa->hdr.type;
                break;
        case IMSG_CTL_SHOW_DB_ASBR:
                lsa = imsg->data;
                if (lsa->hdr.type != lasttype)
                        show_database_head(area_id, ifname, lsa->hdr.type);
                show_db_hdr_msg_detail(&lsa->hdr);

                addr.s_addr = lsa->data.rtr_sum.dest_rtr_id;
                printf("Destination Router ID: %s\n", inet_ntoa(addr));
                printf("Options: %s\n",
                    print_ospf_options(ntohl(lsa->data.rtr_sum.opts)));
                printf("Metric: %d\n\n", ntohl(lsa->data.rtr_sum.metric) &
                    LSA_METRIC_MASK);
        case IMSG_CTL_AREA:
                area = imsg->data;
                area_id = area->id;
                lasttype = 0;
                break;
        case IMSG_CTL_IFACE:
                iface = imsg->data;
                strlcpy(ifname, iface->name, sizeof(ifname));
                lasttype = 0;
                break;
        case IMSG_CTL_END:
                return (1);
        default:
                break;
        }

        return (0);
}

int
show_nbr_msg(struct imsg *imsg)
{
        struct ctl_nbr  *nbr;
        char            *state;

        switch (imsg->hdr.type) {
        case IMSG_CTL_SHOW_NBR:
                nbr = imsg->data;
                if (asprintf(&state, "%s/%s", nbr_state_name(nbr->nbr_state),
                    if_state_name(nbr->iface_state)) == -1)
                        err(1, NULL);
                printf("%-15s %-3d %-12s %-10s", inet_ntoa(nbr->id),
                    nbr->priority, state, fmt_timeframe_core(nbr->dead_timer));
                printf("%-11s %s\n", nbr->name,
                    nbr->uptime == 0 ? "-" : fmt_timeframe_core(nbr->uptime));
                free(state);
                break;
        case IMSG_CTL_END:
                printf("\n");
                return (1);
        default:
                break;
        }

        return (0);
}

const char *
print_ospf_options(u_int32_t opts)
{
        static char     optbuf[32];

        snprintf(optbuf, sizeof(optbuf), "*|*|%s|%s|%s|*|%s|%s",
            opts & OSPF_OPTION_DC ? "DC" : "-",
            opts & OSPF_OPTION_R ? "R" : "-",
            opts & OSPF_OPTION_N ? "N" : "-",
            opts & OSPF_OPTION_E ? "E" : "-",
            opts & OSPF_OPTION_V6 ? "V6" : "-");
        return (optbuf);
}

int
show_nbr_detail_msg(struct imsg *imsg)
{
        struct ctl_nbr  *nbr;

        switch (imsg->hdr.type) {
        case IMSG_CTL_SHOW_NBR:
                nbr = imsg->data;
                printf("\nNeighbor %s, ", inet_ntoa(nbr->id));
                printf("interface address %s\n", log_in6addr(&nbr->addr));
                printf("  Area %s, interface %s\n", inet_ntoa(nbr->area),
                    nbr->name);
                printf("  Neighbor priority is %d, "
                    "State is %s, %d state changes\n",
                    nbr->priority, nbr_state_name(nbr->nbr_state),
                    nbr->state_chng_cnt);
                printf("  DR is %s, ", inet_ntoa(nbr->dr));
                printf("BDR is %s\n", inet_ntoa(nbr->bdr));
                printf("  Options %s\n", print_ospf_options(nbr->options));
                printf("  Dead timer due in %s\n",
                    fmt_timeframe_core(nbr->dead_timer));
                printf("  Uptime %s\n", fmt_timeframe_core(nbr->uptime));
                printf("  Database Summary List %d\n", nbr->db_sum_lst_cnt);
                printf("  Link State Request List %d\n", nbr->ls_req_lst_cnt);
                printf("  Link State Retransmission List %d\n",
                    nbr->ls_retrans_lst_cnt);
                break;
        case IMSG_CTL_END:
                printf("\n");
                return (1);
        default:
                break;
        }

        return (0);
}

int
show_rib_msg(struct imsg *imsg)
{
        struct ctl_rt   *rt;
        char            *dstnet;

        switch (imsg->hdr.type) {
        case IMSG_CTL_SHOW_RIB:
                rt = imsg->data;
                switch (rt->d_type) {
                case DT_NET:
                        if (asprintf(&dstnet, "%s/%d", log_in6addr(&rt->prefix),
                            rt->prefixlen) == -1)
                                err(1, NULL);
                        break;
                case DT_RTR:
                        if (asprintf(&dstnet, "%s",
                            log_in6addr(&rt->prefix)) == -1)
                                err(1, NULL);
                        break;
                default:
                        errx(1, "Invalid route type");
                }

                printf("%-20s %-16s%s %-12s %-9s %-7d %s\n", dstnet,
                    log_in6addr_scope(&rt->nexthop, rt->ifindex),
                    rt->connected ? "C" : " ", path_type_name(rt->p_type),
                    dst_type_name(rt->d_type), rt->cost,
                    rt->uptime == 0 ? "-" : fmt_timeframe_core(rt->uptime));
                free(dstnet);
                break;
        case IMSG_CTL_END:
                printf("\n");
                return (1);
        default:
                break;
        }

        return (0);
}

void
show_rib_head(struct in_addr aid, u_int8_t d_type, u_int8_t p_type)
{
        char    *header, *format, *format2;

        switch (p_type) {
        case PT_INTRA_AREA:
        case PT_INTER_AREA:
                switch (d_type) {
                case DT_NET:
                        format = "Network Routing Table";
                        format2 = "";
                        break;
                case DT_RTR:
                        format = "Router Routing Table";
                        format2 = "Type";
                        break;
                default:
                        errx(1, "unknown route type");
                }
                break;
        case PT_TYPE1_EXT:
        case PT_TYPE2_EXT:
                format = NULL;
                format2 = "Cost 2";
                if ((header = strdup("External Routing Table")) == NULL)
                        err(1, NULL);
                break;
        default:
                errx(1, "unknown route type");
        }

        if (p_type != PT_TYPE1_EXT && p_type != PT_TYPE2_EXT)
                if (asprintf(&header, "%s (Area %s)", format,
                    inet_ntoa(aid)) == -1)
                        err(1, NULL);

        printf("\n%-18s %s\n", "", header);
        free(header);

        printf("\n%-18s %-15s %-15s %-12s %-7s %-7s\n", "Destination",
            "Nexthop", "Adv Router", "Path type", "Cost", format2);
}

const char *
print_ospf_rtr_flags(u_int8_t opts)
{
        static char     optbuf[32];

        snprintf(optbuf, sizeof(optbuf), "%s%s%s",
            opts & OSPF_RTR_E ? "AS" : "",
            opts & OSPF_RTR_E && opts & OSPF_RTR_B ? "+" : "",
            opts & OSPF_RTR_B ? "ABR" : "");
        return (optbuf);
}

int
show_rib_detail_msg(struct imsg *imsg)
{
        struct ctl_rt           *rt;
        char                    *dstnet;
        static u_int8_t          lasttype;

        switch (imsg->hdr.type) {
        case IMSG_CTL_SHOW_RIB:
                rt = imsg->data;

                switch (rt->p_type) {
                case PT_INTRA_AREA:
                case PT_INTER_AREA:
                        switch (rt->d_type) {
                        case DT_NET:
                                if (lasttype != RIB_NET)
                                        show_rib_head(rt->area, rt->d_type,
                                             rt->p_type);
                                if (asprintf(&dstnet, "%s/%d",
                                    log_in6addr(&rt->prefix),
                                    rt->prefixlen) == -1)
                                        err(1, NULL);
                                lasttype = RIB_NET;
                                break;
                        case DT_RTR:
                                if (lasttype != RIB_RTR)
                                        show_rib_head(rt->area, rt->d_type,
                                             rt->p_type);
                                if (asprintf(&dstnet, "%s",
                                    log_in6addr(&rt->prefix)) == -1)
                                        err(1, NULL);
                                lasttype = RIB_RTR;
                                break;
                        default:
                                errx(1, "unknown route type");
                        }
                        printf("%-18s %-15s ", dstnet,
                            log_in6addr_scope(&rt->nexthop, rt->ifindex));
                        printf("%-15s %-12s %-7d", inet_ntoa(rt->adv_rtr),
                            path_type_name(rt->p_type), rt->cost);
                        free(dstnet);

                        if (rt->d_type == DT_RTR)
                                printf(" %-7s",
                                    print_ospf_rtr_flags(rt->flags));

                        printf("\n");
                        break;
                case PT_TYPE1_EXT:
                case PT_TYPE2_EXT:
                        if (lasttype != RIB_EXT)
                                show_rib_head(rt->area, rt->d_type, rt->p_type);

                        if (asprintf(&dstnet, "%s/%d",
                            log_in6addr(&rt->prefix), rt->prefixlen) == -1)
                                err(1, NULL);

                        printf("%-18s %-15s ", dstnet,
                            log_in6addr_scope(&rt->nexthop, rt->ifindex));
                        printf("%-15s %-12s %-7d %-7d\n",
                            inet_ntoa(rt->adv_rtr), path_type_name(rt->p_type),
                            rt->cost, rt->cost2);
                        free(dstnet);

                        lasttype = RIB_EXT;
                        break;
                default:
                        errx(1, "unknown route type");
                }
                break;
        case IMSG_CTL_AREA:
                break;
        case IMSG_CTL_END:
                printf("\n");
                return (1);
        default:
                break;
        }

        return (0);
}

void
show_fib_head(void)
{
        printf("flags: * = valid, O = OSPF, C = Connected, S = Static\n");
        printf("%-6s %-4s %-20s %-17s\n",
            "Flags", "Prio", "Destination", "Nexthop");
}

int
show_fib_msg(struct imsg *imsg)
{
        struct kroute           *k;
        char                    *p;

        switch (imsg->hdr.type) {
        case IMSG_CTL_KROUTE:
                if (imsg->hdr.len < IMSG_HEADER_SIZE + sizeof(struct kroute))
                        errx(1, "wrong imsg len");
                k = imsg->data;

                if (k->flags & F_DOWN)
                        printf(" ");
                else
                        printf("*");

                if (!(k->flags & F_KERNEL))
                        printf("O");
                else if (k->flags & F_CONNECTED)
                        printf("C");
                else if (k->flags & F_STATIC)
                        printf("S");
                else
                        printf(" ");

                printf("     ");
                printf("%4d ", k->priority);
                if (asprintf(&p, "%s/%u", log_in6addr(&k->prefix),
                    k->prefixlen) == -1)
                        err(1, NULL);
                printf("%-20s ", p);
                free(p);

                if (!IN6_IS_ADDR_UNSPECIFIED(&k->nexthop))
                        printf("%s", log_in6addr_scope(&k->nexthop, k->scope));
                else if (k->flags & F_CONNECTED)
                        printf("link#%u", k->ifindex);
                printf("\n");

                break;
        case IMSG_CTL_END:
                printf("\n");
                return (1);
        default:
                break;
        }

        return (0);
}

const struct if_status_description
                if_status_descriptions[] = LINK_STATE_DESCRIPTIONS;
const struct ifmedia_description
                ifm_type_descriptions[] = IFM_TYPE_DESCRIPTIONS;

const char *
get_media_descr(uint64_t media_type)
{
        const struct ifmedia_description        *p;

        for (p = ifm_type_descriptions; p->ifmt_string != NULL; p++)
                if (media_type == p->ifmt_word)
                        return (p->ifmt_string);

        return ("unknown");
}

const char *
get_linkstate(uint8_t if_type, int link_state)
{
        const struct if_status_description *p;
        static char buf[8];

        for (p = if_status_descriptions; p->ifs_string != NULL; p++) {
                if (LINK_STATE_DESC_MATCH(p, if_type, link_state))
                        return (p->ifs_string);
        }
        snprintf(buf, sizeof(buf), "[#%d]", link_state);
        return (buf);
}

void
print_baudrate(u_int64_t baudrate)
{
        if (baudrate > IF_Gbps(1))
                printf("%llu GBit/s", baudrate / IF_Gbps(1));
        else if (baudrate > IF_Mbps(1))
                printf("%llu MBit/s", baudrate / IF_Mbps(1));
        else if (baudrate > IF_Kbps(1))
                printf("%llu KBit/s", baudrate / IF_Kbps(1));
        else
                printf("%llu Bit/s", baudrate);
}