usr.sbin/ipmpstat/ipmpstat.c

	ipmpstat.c revision e11c3f44f531fdff80941ce57c065d2ae861cefc
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 *
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include <alloca.h>
#include <arpa/inet.h>
#include <assert.h>
#include <errno.h>
#include <ipmp_admin.h>
#include <ipmp_query.h>
#include <libintl.h>
#include <libnvpair.h>
#include <libsysevent.h>
#include <locale.h>
#include <netdb.h>
#include <signal.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/sysevent/eventdefs.h>
#include <sys/sysevent/ipmp.h>
#include <sys/sysmacros.h>
#include <sys/termios.h>
#include <sys/types.h>

/*
 * ipmpstat -- display IPMP subsystem status.
 *
 * This utility makes extensive use of libipmp and IPMP sysevents to gather
 * and pretty-print the status of the IPMP subsystem.  All output formats
 * except for -p (probe) use libipmp to create a point-in-time snapshot of the
 * IPMP subsystem (unless the test-special -L flag is used), and then output
 * the contents of that snapshot in a user-specified manner.  Because the
 * output format and requested fields aren't known until run-time, three sets
 * of function pointers and two core data structures are used. Specifically:
 *
 *      * The ipmpstat_walker_t function pointers (walk_*) iterate through
 *    all instances of a given IPMP object (group, interface, or address).
 *    At most one ipmpstat_walker_t is used per ipmpstat invocation.
 *    Since target information is included with the interface information,
 *    both -i and -t use the interface walker (walk_if()).
 *
 *      * The ipmpstat_sfunc_t function pointers (sfunc_*) obtain a given
 *    value for a given IPMP object.  Each ipmpstat_sunc_t is passed a
 *    buffer to write its result into, the buffer's size, and an
 *    ipmpstat_sfunc_arg_t state structure.  The state structure consists
 *    of a pointer to the IPMP object to obtain information from
 *    (sa_data), and an open libipmp handle (sa_ih) which can be used to
 *    do additional libipmp queries, if necessary (e.g., because the
 *    object does not have all of the needed information).
 *
 *  * The ipmpstat_field_t structure provides the list of supported fields
 *    for a given output format, along with output formatting information
 *    (e.g., field width), and a pointer to an ipmpstat_sfunc_t function
 *    that can obtain the value for a IPMP given object.  For a given
 *    ipmpstat output format, there's a corresponding array of
 *    ipmpstat_field_t structures.  Thus, one ipmpstat_field_t array is
 *    used per ipmpstat invocation.
 *
 *  * The ipmpstat_ofmt_t provides an ordered list of the requested
 *    ipmpstat_field_t's (e.g., via -o) for a given ipmpstat invocation.
 *    It is built at runtime from the command-line arguments.  This
 *    structure (and a given IPMP object) is used by ofmt_output() to
 *    output a single line of information about that IPMP object.
 *
 *  * The ipmpstat_cbfunc_t function pointers (*_cbfunc) are called back
 *    by the walkers.  They are used both internally to implement nested
 *    walks, and by the ipmpstat output logic to provide the glue between
 *    the IPMP object walkers and the ofmt_output() logic.  Usually, a
 *    single line is output for each IPMP object, and thus ofmt_output()
 *    can be directly invoked (see info_output_cbfunc()).  However, if
 *    multiple lines need to be output, then a more complex cbfunc is
 *    needed (see targinfo_output_cbfunc()).  At most one cbfunc is used
 *    per ipmpstat invocation.
 */

/*
 * Data type used by the sfunc callbacks to obtain the requested information
 * from the agreed-upon object.
 */
typedef struct ipmpstat_sfunc_arg {
    ipmp_handle_t       sa_ih;
    void            *sa_data;
} ipmpstat_sfunc_arg_t;

typedef void ipmpstat_sfunc_t(ipmpstat_sfunc_arg_t *, char *, uint_t);

/*
 * Data type that describes how to output a field; used by ofmt_output*().
 */
typedef struct ipmpstat_field {
    const char      *f_name;    /* field name */
    uint_t          f_width;    /* output width */
    ipmpstat_sfunc_t    *f_sfunc;   /* value->string function */
} ipmpstat_field_t;

/*
 * Data type that specifies the output field order; used by ofmt_output*()
 */
typedef struct ipmpstat_ofmt {
    const ipmpstat_field_t  *o_field;   /* current field info */
    struct ipmpstat_ofmt    *o_next;    /* next field */
} ipmpstat_ofmt_t;

/*
 * Function pointers used to iterate through IPMP objects.
 */
typedef void ipmpstat_cbfunc_t(ipmp_handle_t, void *, void *);
typedef void ipmpstat_walker_t(ipmp_handle_t, ipmpstat_cbfunc_t *, void *);

/*
 * Data type used to implement nested walks.
 */
typedef struct ipmpstat_walkdata {
    ipmpstat_cbfunc_t   *iw_func;   /* caller-specified callback */
    void            *iw_funcarg;    /* caller-specified arg */
} ipmpstat_walkdata_t;

/*
 * Data type used by enum2str() to map an enumerated value to a string.
 */
typedef struct ipmpstat_enum {
    const char      *e_name;    /* string */
    int         e_val;      /* value */
} ipmpstat_enum_t;

/*
 * Data type used to pass state between probe_output() and probe_event().
 */
typedef struct ipmpstat_probe_state {
    ipmp_handle_t   ps_ih;          /* open IPMP handle */
    ipmpstat_ofmt_t *ps_ofmt;       /* requested ofmt string */
} ipmpstat_probe_state_t;

/*
 * Options that modify the output mode; more than one may be lit.
 */
typedef enum {
    IPMPSTAT_OPT_NUMERIC    = 0x1,
    IPMPSTAT_OPT_PARSABLE   = 0x2
} ipmpstat_opt_t;

/*
 * Indices for the FLAGS field of the `-i' output format.
 */
enum {
    IPMPSTAT_IFLAG_INDEX,   IPMPSTAT_SFLAG_INDEX,   IPMPSTAT_M4FLAG_INDEX,
    IPMPSTAT_BFLAG_INDEX,   IPMPSTAT_M6FLAG_INDEX,  IPMPSTAT_DFLAG_INDEX,
    IPMPSTAT_HFLAG_INDEX,   IPMPSTAT_NUM_FLAGS
};

#define IPMPSTAT_NCOL   80
#define NS2FLOATMS(ns)  ((float)(ns) / (NANOSEC / MILLISEC))
#define MS2FLOATSEC(ms) ((float)(ms) / 1000)

static const char   *progname;
static hrtime_t     probe_output_start;
static struct winsize   winsize;
static ipmpstat_opt_t   opt;
static ipmpstat_enum_t  addr_state[], group_state[], if_state[], if_link[];
static ipmpstat_enum_t  if_probe[], targ_mode[];
static ipmpstat_field_t addr_fields[], group_fields[], if_fields[];
static ipmpstat_field_t probe_fields[], targ_fields[];
static ipmpstat_cbfunc_t walk_addr_cbfunc, walk_if_cbfunc;
static ipmpstat_cbfunc_t info_output_cbfunc, targinfo_output_cbfunc;
static ipmpstat_walker_t walk_addr, walk_if, walk_group;

static int probe_event(sysevent_t *, void *);
static void probe_output(ipmp_handle_t, ipmpstat_ofmt_t *);
static ipmpstat_field_t *field_find(ipmpstat_field_t *, const char *);
static ipmpstat_ofmt_t *ofmt_create(const char *, ipmpstat_field_t []);
static void ofmt_output(const ipmpstat_ofmt_t *, ipmp_handle_t, void *);
static void ofmt_destroy(ipmpstat_ofmt_t *);
static void enum2str(const ipmpstat_enum_t *, int, char *, uint_t);
static void sockaddr2str(const struct sockaddr_storage *, char *, uint_t);
static void sighandler(int);
static void usage(void);
static void die(const char *, ...);
static void die_ipmperr(int, const char *, ...);
static void warn(const char *, ...);
static void warn_ipmperr(int, const char *, ...);

int
main(int argc, char **argv)
{
    int c;
    int err;
    const char *ofields = NULL;
    ipmp_handle_t ih;
    ipmp_qcontext_t qcontext = IPMP_QCONTEXT_SNAP;
    ipmpstat_ofmt_t *ofmt;
    ipmpstat_field_t *fields = NULL;
    ipmpstat_cbfunc_t *cbfunc;
    ipmpstat_walker_t *walker;

    if ((progname = strrchr(argv[0], '/')) == NULL)
        progname = argv[0];
    else
        progname++;

    (void) setlocale(LC_ALL, "");
    (void) textdomain(TEXT_DOMAIN);

    while ((c = getopt(argc, argv, "nLPo:agipt")) != EOF) {
        if (fields != NULL && strchr("agipt", c) != NULL)
            die("only one output format may be specified\n");

        switch (c) {
        case 'n':
            opt |= IPMPSTAT_OPT_NUMERIC;
            break;
        case 'L':
            /* Undocumented option: for testing use ONLY */
            qcontext = IPMP_QCONTEXT_LIVE;
            break;
        case 'P':
            opt |= IPMPSTAT_OPT_PARSABLE;
            break;
        case 'o':
            ofields = optarg;
            break;
        case 'a':
            walker = walk_addr;
            cbfunc = info_output_cbfunc;
            fields = addr_fields;
            break;
        case 'g':
            walker = walk_group;
            cbfunc = info_output_cbfunc;
            fields = group_fields;
            break;
        case 'i':
            walker = walk_if;
            cbfunc = info_output_cbfunc;
            fields = if_fields;
            break;
        case 'p':
            fields = probe_fields;
            break;
        case 't':
            walker = walk_if;
            cbfunc = targinfo_output_cbfunc;
            fields = targ_fields;
            break;
        default:
            usage();
            break;
        }
    }

    if (argc > optind || fields == NULL)
        usage();

    if (opt & IPMPSTAT_OPT_PARSABLE) {
        if (ofields == NULL) {
            die("output field list (-o) required in parsable "
                "output mode\n");
        } else if (strcasecmp(ofields, "all") == 0) {
            die("\"all\" not allowed in parsable output mode\n");
        }
    }

    /*
     * Obtain the window size and monitor changes to the size.  This data
     * is used to redisplay the output headers when necessary.
     */
    (void) sigset(SIGWINCH, sighandler);
    sighandler(SIGWINCH);

    if ((err = ipmp_open(&ih)) != IPMP_SUCCESS)
        die_ipmperr(err, "cannot create IPMP handle");

    if (ipmp_ping_daemon(ih) != IPMP_SUCCESS)
        die("cannot contact in.mpathd(1M) -- is IPMP in use?\n");

    /*
     * Create the ofmt linked list that will eventually be passed to
     * to ofmt_output() to output the fields.
     */
    ofmt = ofmt_create(ofields, fields);

    /*
     * If we've been asked to display probes, then call the probe output
     * function.  Otherwise, snapshot IPMP state (or use live state) and
     * invoke the specified walker with the specified callback function.
     */
    if (fields == probe_fields) {
        probe_output(ih, ofmt);
    } else {
        if ((err = ipmp_setqcontext(ih, qcontext)) != IPMP_SUCCESS) {
            if (qcontext == IPMP_QCONTEXT_SNAP)
                die_ipmperr(err, "cannot snapshot IPMP state");
            else
                die_ipmperr(err, "cannot use live IPMP state");
        }
        (*walker)(ih, cbfunc, ofmt);
    }

    ofmt_destroy(ofmt);
    ipmp_close(ih);

    return (EXIT_SUCCESS);
}

/*
 * Walks all IPMP groups on the system and invokes `cbfunc' on each, passing
 * it `ih', the ipmp_groupinfo_t pointer, and `arg'.
 */
static void
walk_group(ipmp_handle_t ih, ipmpstat_cbfunc_t *cbfunc, void *arg)
{
    int err;
    uint_t i;
    ipmp_groupinfo_t *grinfop;
    ipmp_grouplist_t *grlistp;

    if ((err = ipmp_getgrouplist(ih, &grlistp)) != IPMP_SUCCESS)
        die_ipmperr(err, "cannot get IPMP group list");

    for (i = 0; i < grlistp->gl_ngroup; i++) {
        err = ipmp_getgroupinfo(ih, grlistp->gl_groups[i], &grinfop);
        if (err != IPMP_SUCCESS) {
            warn_ipmperr(err, "cannot get info for group `%s'",
                grlistp->gl_groups[i]);
            continue;
        }
        (*cbfunc)(ih, grinfop, arg);
        ipmp_freegroupinfo(grinfop);
    }

    ipmp_freegrouplist(grlistp);
}

/*
 * Walks all IPMP interfaces on the system and invokes `cbfunc' on each,
 * passing it `ih', the ipmp_ifinfo_t pointer, and `arg'.
 */
static void
walk_if(ipmp_handle_t ih, ipmpstat_cbfunc_t *cbfunc, void *arg)
{
    ipmpstat_walkdata_t iw = { cbfunc, arg };

    walk_group(ih, walk_if_cbfunc, &iw);
}

/*
 * Walks all IPMP data addresses on the system and invokes `cbfunc' on each.
 * passing it `ih', the ipmp_addrinfo_t pointer, and `arg'.
 */
static void
walk_addr(ipmp_handle_t ih, ipmpstat_cbfunc_t *cbfunc, void *arg)
{
    ipmpstat_walkdata_t iw = { cbfunc, arg };

    walk_group(ih, walk_addr_cbfunc, &iw);
}

/*
 * Nested walker callback function for walk_if().
 */
static void
walk_if_cbfunc(ipmp_handle_t ih, void *infop, void *arg)
{
    int err;
    uint_t i;
    ipmp_groupinfo_t *grinfop = infop;
    ipmp_ifinfo_t *ifinfop;
    ipmp_iflist_t *iflistp = grinfop->gr_iflistp;
    ipmpstat_walkdata_t *iwp = arg;

    for (i = 0; i < iflistp->il_nif; i++) {
        err = ipmp_getifinfo(ih, iflistp->il_ifs[i], &ifinfop);
        if (err != IPMP_SUCCESS) {
            warn_ipmperr(err, "cannot get info for interface `%s'",
                iflistp->il_ifs[i]);
            continue;
        }
        (*iwp->iw_func)(ih, ifinfop, iwp->iw_funcarg);
        ipmp_freeifinfo(ifinfop);
    }
}

/*
 * Nested walker callback function for walk_addr().
 */
static void
walk_addr_cbfunc(ipmp_handle_t ih, void *infop, void *arg)
{
    int err;
    uint_t i;
    ipmp_groupinfo_t *grinfop = infop;
    ipmp_addrinfo_t *adinfop;
    ipmp_addrlist_t *adlistp = grinfop->gr_adlistp;
    ipmpstat_walkdata_t *iwp = arg;
    char addr[INET6_ADDRSTRLEN];
    struct sockaddr_storage *addrp;

    for (i = 0; i < adlistp->al_naddr; i++) {
        addrp = &adlistp->al_addrs[i];
        err = ipmp_getaddrinfo(ih, grinfop->gr_name, addrp, &adinfop);
        if (err != IPMP_SUCCESS) {
            sockaddr2str(addrp, addr, sizeof (addr));
            warn_ipmperr(err, "cannot get info for `%s'", addr);
            continue;
        }
        (*iwp->iw_func)(ih, adinfop, iwp->iw_funcarg);
        ipmp_freeaddrinfo(adinfop);
    }
}

static void
sfunc_nvwarn(const char *nvname, char *buf, uint_t bufsize)
{
    warn("cannot retrieve %s\n", nvname);
    (void) strlcpy(buf, "?", bufsize);
}

static void
sfunc_addr_address(ipmpstat_sfunc_arg_t *arg, char *buf, uint_t bufsize)
{
    ipmp_addrinfo_t *adinfop = arg->sa_data;

    sockaddr2str(&adinfop->ad_addr, buf, bufsize);
}

static void
sfunc_addr_group(ipmpstat_sfunc_arg_t *arg, char *buf, uint_t bufsize)
{
    int err;
    ipmp_addrinfo_t *adinfop = arg->sa_data;
    ipmp_groupinfo_t *grinfop;

    err = ipmp_getgroupinfo(arg->sa_ih, adinfop->ad_group, &grinfop);
    if (err != IPMP_SUCCESS) {
        warn_ipmperr(err, "cannot get info for group `%s'",
            adinfop->ad_group);
        (void) strlcpy(buf, "?", bufsize);
        return;
    }
    (void) strlcpy(buf, grinfop->gr_ifname, bufsize);
    ipmp_freegroupinfo(grinfop);
}

static void
sfunc_addr_state(ipmpstat_sfunc_arg_t *arg, char *buf, uint_t bufsize)
{
    ipmp_addrinfo_t *adinfop = arg->sa_data;

    enum2str(addr_state, adinfop->ad_state, buf, bufsize);
}

static void
sfunc_addr_inbound(ipmpstat_sfunc_arg_t *arg, char *buf, uint_t bufsize)
{
    ipmp_addrinfo_t *adinfop = arg->sa_data;

    (void) strlcpy(buf, adinfop->ad_binding, bufsize);
}

static void
sfunc_addr_outbound(ipmpstat_sfunc_arg_t *arg, char *buf, uint_t bufsize)
{
    int err;
    uint_t i, nactive = 0;
    ipmp_ifinfo_t *ifinfop;
    ipmp_iflist_t *iflistp;
    ipmp_addrinfo_t *adinfop = arg->sa_data;
    ipmp_groupinfo_t *grinfop;

    if (adinfop->ad_state == IPMP_ADDR_DOWN)
        return;

    /*
     * If there's no inbound interface for this address, there can't
     * be any outbound traffic.
     */
    if (adinfop->ad_binding[0] == '\0')
        return;

    /*
     * The address can use any active interface in the group, so
     * obtain all of those.
     */
    err = ipmp_getgroupinfo(arg->sa_ih, adinfop->ad_group, &grinfop);
    if (err != IPMP_SUCCESS) {
        warn_ipmperr(err, "cannot get info for group `%s'",
            adinfop->ad_group);
        (void) strlcpy(buf, "?", bufsize);
        return;
    }

    iflistp = grinfop->gr_iflistp;
    for (i = 0; i < iflistp->il_nif; i++) {
        err = ipmp_getifinfo(arg->sa_ih, iflistp->il_ifs[i], &ifinfop);
        if (err != IPMP_SUCCESS) {
            warn_ipmperr(err, "cannot get info for interface `%s'",
                iflistp->il_ifs[i]);
            continue;
        }

        if (ifinfop->if_flags & IPMP_IFFLAG_ACTIVE) {
            if (nactive++ != 0)
                (void) strlcat(buf, " ", bufsize);
            (void) strlcat(buf, ifinfop->if_name, bufsize);
        }
        ipmp_freeifinfo(ifinfop);
    }
    ipmp_freegroupinfo(grinfop);
}

static void
sfunc_group_name(ipmpstat_sfunc_arg_t *arg, char *buf, uint_t bufsize)
{
    ipmp_groupinfo_t *grinfop = arg->sa_data;

    (void) strlcpy(buf, grinfop->gr_name, bufsize);
}

static void
sfunc_group_ifname(ipmpstat_sfunc_arg_t *arg, char *buf, uint_t bufsize)
{
    ipmp_groupinfo_t *grinfop = arg->sa_data;

    (void) strlcpy(buf, grinfop->gr_ifname, bufsize);
}

static void
sfunc_group_state(ipmpstat_sfunc_arg_t *arg, char *buf, uint_t bufsize)
{
    ipmp_groupinfo_t *grinfop = arg->sa_data;

    enum2str(group_state, grinfop->gr_state, buf, bufsize);
}

static void
sfunc_group_fdt(ipmpstat_sfunc_arg_t *arg, char *buf, uint_t bufsize)
{
    ipmp_groupinfo_t *grinfop = arg->sa_data;

    if (grinfop->gr_fdt == 0)
        return;

    (void) snprintf(buf, bufsize, "%.2fs", MS2FLOATSEC(grinfop->gr_fdt));
}

static void
sfunc_group_interfaces(ipmpstat_sfunc_arg_t *arg, char *buf, uint_t bufsize)
{
    int err;
    uint_t i;
    char *active, *inactive, *unusable;
    uint_t nactive = 0, ninactive = 0, nunusable = 0;
    ipmp_groupinfo_t *grinfop = arg->sa_data;
    ipmp_iflist_t *iflistp = grinfop->gr_iflistp;
    ipmp_ifinfo_t *ifinfop;

    active = alloca(bufsize);
    active[0] = '\0';
    inactive = alloca(bufsize);
    inactive[0] = '\0';
    unusable = alloca(bufsize);
    unusable[0] = '\0';

    for (i = 0; i < iflistp->il_nif; i++) {
        err = ipmp_getifinfo(arg->sa_ih, iflistp->il_ifs[i], &ifinfop);
        if (err != IPMP_SUCCESS) {
            warn_ipmperr(err, "cannot get info for interface `%s'",
                iflistp->il_ifs[i]);
            continue;
        }

        if (ifinfop->if_flags & IPMP_IFFLAG_ACTIVE) {
            if (nactive++ != 0)
                (void) strlcat(active, " ", bufsize);
            (void) strlcat(active, ifinfop->if_name, bufsize);
        } else if (ifinfop->if_flags & IPMP_IFFLAG_INACTIVE) {
            if (ninactive++ != 0)
                (void) strlcat(inactive, " ", bufsize);
            (void) strlcat(inactive, ifinfop->if_name, bufsize);
        } else {
            if (nunusable++ != 0)
                (void) strlcat(unusable, " ", bufsize);
            (void) strlcat(unusable, ifinfop->if_name, bufsize);
        }

        ipmp_freeifinfo(ifinfop);
    }

    (void) strlcpy(buf, active, bufsize);

    if (ninactive > 0) {
        if (nactive != 0)
            (void) strlcat(buf, " ", bufsize);

        (void) strlcat(buf, "(", bufsize);
        (void) strlcat(buf, inactive, bufsize);
        (void) strlcat(buf, ")", bufsize);
    }

    if (nunusable > 0) {
        if (nactive + ninactive != 0)
            (void) strlcat(buf, " ", bufsize);

        (void) strlcat(buf, "[", bufsize);
        (void) strlcat(buf, unusable, bufsize);
        (void) strlcat(buf, "]", bufsize);
    }
}

static void
sfunc_if_name(ipmpstat_sfunc_arg_t *arg, char *buf, uint_t bufsize)
{
    ipmp_ifinfo_t *ifinfop = arg->sa_data;

    (void) strlcpy(buf, ifinfop->if_name, bufsize);
}

static void
sfunc_if_active(ipmpstat_sfunc_arg_t *arg, char *buf, uint_t bufsize)
{
    ipmp_ifinfo_t *ifinfop = arg->sa_data;

    if (ifinfop->if_flags & IPMP_IFFLAG_ACTIVE)
        (void) strlcpy(buf, "yes", bufsize);
    else
        (void) strlcpy(buf, "no", bufsize);
}

static void
sfunc_if_group(ipmpstat_sfunc_arg_t *arg, char *buf, uint_t bufsize)
{
    int err;
    ipmp_ifinfo_t *ifinfop = arg->sa_data;
    ipmp_groupinfo_t *grinfop;

    err = ipmp_getgroupinfo(arg->sa_ih, ifinfop->if_group, &grinfop);
    if (err != IPMP_SUCCESS) {
        warn_ipmperr(err, "cannot get info for group `%s'",
            ifinfop->if_group);
        (void) strlcpy(buf, "?", bufsize);
        return;
    }

    (void) strlcpy(buf, grinfop->gr_ifname, bufsize);
    ipmp_freegroupinfo(grinfop);
}

static void
sfunc_if_flags(ipmpstat_sfunc_arg_t *arg, char *buf, uint_t bufsize)
{
    int err;
    ipmp_ifinfo_t *ifinfop = arg->sa_data;
    ipmp_groupinfo_t *grinfop;

    assert(bufsize > IPMPSTAT_NUM_FLAGS);

    (void) memset(buf, '-', IPMPSTAT_NUM_FLAGS);
    buf[IPMPSTAT_NUM_FLAGS] = '\0';

    if (ifinfop->if_type == IPMP_IF_STANDBY)
        buf[IPMPSTAT_SFLAG_INDEX] = 's';

    if (ifinfop->if_flags & IPMP_IFFLAG_INACTIVE)
        buf[IPMPSTAT_IFLAG_INDEX] = 'i';

    if (ifinfop->if_flags & IPMP_IFFLAG_DOWN)
        buf[IPMPSTAT_DFLAG_INDEX] = 'd';

    if (ifinfop->if_flags & IPMP_IFFLAG_HWADDRDUP)
        buf[IPMPSTAT_HFLAG_INDEX] = 'h';

    err = ipmp_getgroupinfo(arg->sa_ih, ifinfop->if_group, &grinfop);
    if (err != IPMP_SUCCESS) {
        warn_ipmperr(err, "cannot get broadcast/multicast info for "
            "group `%s'", ifinfop->if_group);
        return;
    }

    if (strcmp(grinfop->gr_m4ifname, ifinfop->if_name) == 0)
        buf[IPMPSTAT_M4FLAG_INDEX] = 'm';

    if (strcmp(grinfop->gr_m6ifname, ifinfop->if_name) == 0)
        buf[IPMPSTAT_M6FLAG_INDEX] = 'M';

    if (strcmp(grinfop->gr_bcifname, ifinfop->if_name) == 0)
        buf[IPMPSTAT_BFLAG_INDEX] = 'b';

    ipmp_freegroupinfo(grinfop);
}

static void
sfunc_if_link(ipmpstat_sfunc_arg_t *arg, char *buf, uint_t bufsize)
{
    ipmp_ifinfo_t *ifinfop = arg->sa_data;

    enum2str(if_link, ifinfop->if_linkstate, buf, bufsize);
}

static void
sfunc_if_probe(ipmpstat_sfunc_arg_t *arg, char *buf, uint_t bufsize)
{
    ipmp_ifinfo_t *ifinfop = arg->sa_data;

    enum2str(if_probe, ifinfop->if_probestate, buf, bufsize);
}

static void
sfunc_if_state(ipmpstat_sfunc_arg_t *arg, char *buf, uint_t bufsize)
{
    ipmp_ifinfo_t *ifinfop = arg->sa_data;

    enum2str(if_state, ifinfop->if_state, buf, bufsize);
}

static void
sfunc_probe_id(ipmpstat_sfunc_arg_t *arg, char *buf, uint_t bufsize)
{
    uint32_t probe_id;
    nvlist_t *nvl = arg->sa_data;

    if (nvlist_lookup_uint32(nvl, IPMP_PROBE_ID, &probe_id) != 0) {
        sfunc_nvwarn("IPMP_PROBE_ID", buf, bufsize);
        return;
    }

    (void) snprintf(buf, bufsize, "%u", probe_id);
}

static void
sfunc_probe_ifname(ipmpstat_sfunc_arg_t *arg, char *buf, uint_t bufsize)
{
    char *ifname;
    nvlist_t *nvl = arg->sa_data;

    if (nvlist_lookup_string(nvl, IPMP_IF_NAME, &ifname) != 0) {
        sfunc_nvwarn("IPMP_IF_NAME", buf, bufsize);
        return;
    }

    (void) strlcpy(buf, ifname, bufsize);
}

static void
sfunc_probe_time(ipmpstat_sfunc_arg_t *arg, char *buf, uint_t bufsize)
{
    hrtime_t start;
    nvlist_t *nvl = arg->sa_data;

    if (nvlist_lookup_hrtime(nvl, IPMP_PROBE_START_TIME, &start) != 0) {
        sfunc_nvwarn("IPMP_PROBE_START_TIME", buf, bufsize);
        return;
    }

    (void) snprintf(buf, bufsize, "%.2fs",
        (float)(start - probe_output_start) / NANOSEC);
}

static void
sfunc_probe_target(ipmpstat_sfunc_arg_t *arg, char *buf, uint_t bufsize)
{
    uint_t nelem;
    struct sockaddr_storage *target;
    nvlist_t *nvl = arg->sa_data;

    if (nvlist_lookup_byte_array(nvl, IPMP_PROBE_TARGET,
        (uchar_t **)&target, &nelem) != 0) {
        sfunc_nvwarn("IPMP_PROBE_TARGET", buf, bufsize);
        return;
    }

    sockaddr2str(target, buf, bufsize);
}

static void
sfunc_probe_rtt(ipmpstat_sfunc_arg_t *arg, char *buf, uint_t bufsize)
{
    hrtime_t start, ackproc;
    nvlist_t *nvl = arg->sa_data;
    uint32_t state;

    if (nvlist_lookup_uint32(nvl, IPMP_PROBE_STATE, &state) != 0) {
        sfunc_nvwarn("IPMP_PROBE_STATE", buf, bufsize);
        return;
    }

    if (state != IPMP_PROBE_ACKED)
        return;

    if (nvlist_lookup_hrtime(nvl, IPMP_PROBE_START_TIME, &start) != 0) {
        sfunc_nvwarn("IPMP_PROBE_START_TIME", buf, bufsize);
        return;
    }

    if (nvlist_lookup_hrtime(nvl, IPMP_PROBE_ACKPROC_TIME, &ackproc) != 0) {
        sfunc_nvwarn("IPMP_PROBE_ACKPROC_TIME", buf, bufsize);
        return;
    }

    (void) snprintf(buf, bufsize, "%.2fms", NS2FLOATMS(ackproc - start));
}

static void
sfunc_probe_netrtt(ipmpstat_sfunc_arg_t *arg, char *buf, uint_t bufsize)
{
    hrtime_t sent, ackrecv;
    nvlist_t *nvl = arg->sa_data;
    uint32_t state;

    if (nvlist_lookup_uint32(nvl, IPMP_PROBE_STATE, &state) != 0) {
        sfunc_nvwarn("IPMP_PROBE_STATE", buf, bufsize);
        return;
    }

    if (state != IPMP_PROBE_ACKED)
        return;

    if (nvlist_lookup_hrtime(nvl, IPMP_PROBE_SENT_TIME, &sent) != 0) {
        sfunc_nvwarn("IPMP_PROBE_SENT_TIME", buf, bufsize);
        return;
    }

    if (nvlist_lookup_hrtime(nvl, IPMP_PROBE_ACKRECV_TIME, &ackrecv) != 0) {
        sfunc_nvwarn("IPMP_PROBE_ACKRECV_TIME", buf, bufsize);
        return;
    }

    (void) snprintf(buf, bufsize, "%.2fms", NS2FLOATMS(ackrecv - sent));
}

static void
sfunc_probe_rttavg(ipmpstat_sfunc_arg_t *arg, char *buf, uint_t bufsize)
{
    int64_t rttavg;
    nvlist_t *nvl = arg->sa_data;

    if (nvlist_lookup_int64(nvl, IPMP_PROBE_TARGET_RTTAVG, &rttavg) != 0) {
        sfunc_nvwarn("IPMP_PROBE_TARGET_RTTAVG", buf, bufsize);
        return;
    }

    if (rttavg != 0)
        (void) snprintf(buf, bufsize, "%.2fms", NS2FLOATMS(rttavg));
}

static void
sfunc_probe_rttdev(ipmpstat_sfunc_arg_t *arg, char *buf, uint_t bufsize)
{
    int64_t rttdev;
    nvlist_t *nvl = arg->sa_data;

    if (nvlist_lookup_int64(nvl, IPMP_PROBE_TARGET_RTTDEV, &rttdev) != 0) {
        sfunc_nvwarn("IPMP_PROBE_TARGET_RTTDEV", buf, bufsize);
        return;
    }

    if (rttdev != 0)
        (void) snprintf(buf, bufsize, "%.2fms", NS2FLOATMS(rttdev));
}

/* ARGSUSED */
static void
probe_enabled_cbfunc(ipmp_handle_t ih, void *infop, void *arg)
{
    uint_t *nenabledp = arg;
    ipmp_ifinfo_t *ifinfop = infop;

    if (ifinfop->if_probestate != IPMP_PROBE_DISABLED)
        (*nenabledp)++;
}

static void
probe_output(ipmp_handle_t ih, ipmpstat_ofmt_t *ofmt)
{
    char sub[MAX_SUBID_LEN];
    evchan_t *evch;
    ipmpstat_probe_state_t ps = { ih, ofmt };
    uint_t nenabled = 0;

    /*
     * Check if any interfaces are enabled for probe-based failure
     * detection.  If not, immediately fail.
     */
    walk_if(ih, probe_enabled_cbfunc, &nenabled);
    if (nenabled == 0)
        die("probe-based failure detection is disabled\n");

    probe_output_start = gethrtime();

    /*
     * Unfortunately, until 4791900 is fixed, only privileged processes
     * can bind and thus receive sysevents.
     */
    errno = sysevent_evc_bind(IPMP_EVENT_CHAN, &evch, EVCH_CREAT);
    if (errno != 0) {
        if (errno == EPERM)
            die("insufficient privileges for -p\n");
        die("sysevent_evc_bind to channel %s failed", IPMP_EVENT_CHAN);
    }

    /*
     * The subscriber must be unique in order for sysevent_evc_subscribe()
     * to succeed, so combine our name and pid.
     */
    (void) snprintf(sub, sizeof (sub), "%d-%s", getpid(), progname);

    errno = sysevent_evc_subscribe(evch, sub, EC_IPMP, probe_event, &ps, 0);
    if (errno != 0)
        die("sysevent_evc_subscribe for class %s failed", EC_IPMP);

    for (;;)
        (void) pause();
}

static int
probe_event(sysevent_t *ev, void *arg)
{
    nvlist_t *nvl;
    uint32_t state;
    uint32_t version;
    ipmpstat_probe_state_t *psp = arg;

    if (strcmp(sysevent_get_subclass_name(ev), ESC_IPMP_PROBE_STATE) != 0)
        return (0);

    if (sysevent_get_attr_list(ev, &nvl) != 0) {
        warn("sysevent_get_attr_list failed; dropping event");
        return (0);
    }

    if (nvlist_lookup_uint32(nvl, IPMP_EVENT_VERSION, &version) != 0) {
        warn("dropped event with no IPMP_EVENT_VERSION\n");
        goto out;
    }

    if (version != IPMP_EVENT_CUR_VERSION) {
        warn("dropped event with unsupported IPMP_EVENT_VERSION %d\n",
            version);
        goto out;
    }

    if (nvlist_lookup_uint32(nvl, IPMP_PROBE_STATE, &state) != 0) {
        warn("dropped event with no IPMP_PROBE_STATE\n");
        goto out;
    }

    if (state == IPMP_PROBE_ACKED || state == IPMP_PROBE_LOST)
        ofmt_output(psp->ps_ofmt, psp->ps_ih, nvl);
out:
    nvlist_free(nvl);
    return (0);
}

static void
sfunc_targ_ifname(ipmpstat_sfunc_arg_t *arg, char *buf, uint_t bufsize)
{
    ipmp_targinfo_t *targinfop = arg->sa_data;

    (void) strlcpy(buf, targinfop->it_name, bufsize);
}

static void
sfunc_targ_mode(ipmpstat_sfunc_arg_t *arg, char *buf, uint_t bufsize)
{
    ipmp_targinfo_t *targinfop = arg->sa_data;

    enum2str(targ_mode, targinfop->it_targmode, buf, bufsize);
}

static void
sfunc_targ_testaddr(ipmpstat_sfunc_arg_t *arg, char *buf, uint_t bufsize)
{
    ipmp_targinfo_t *targinfop = arg->sa_data;

    if (targinfop->it_targmode != IPMP_TARG_DISABLED)
        sockaddr2str(&targinfop->it_testaddr, buf, bufsize);
}

static void
sfunc_targ_targets(ipmpstat_sfunc_arg_t *arg, char *buf, uint_t bufsize)
{
    uint_t i;
    char *targname = alloca(bufsize);
    ipmp_targinfo_t *targinfop = arg->sa_data;
    ipmp_addrlist_t *targlistp = targinfop->it_targlistp;

    for (i = 0; i < targlistp->al_naddr; i++) {
        sockaddr2str(&targlistp->al_addrs[i], targname, bufsize);
        (void) strlcat(buf, targname, bufsize);
        if ((i + 1) < targlistp->al_naddr)
            (void) strlcat(buf, " ", bufsize);
    }
}

static void
info_output_cbfunc(ipmp_handle_t ih, void *infop, void *arg)
{
    ofmt_output(arg, ih, infop);
}

static void
targinfo_output_cbfunc(ipmp_handle_t ih, void *infop, void *arg)
{
    ipmp_ifinfo_t *ifinfop = infop;
    ipmp_if_targmode_t targmode4 = ifinfop->if_targinfo4.it_targmode;
    ipmp_if_targmode_t targmode6 = ifinfop->if_targinfo6.it_targmode;

    /*
     * Usually, either IPv4 or IPv6 probing will be enabled, but the admin
     * may enable both.  If only one is enabled, omit the other one so as
     * to not encourage the admin to enable both.  If neither is enabled,
     * we still print one just so the admin can see a MODE of "disabled".
     */
    if (targmode4 != IPMP_TARG_DISABLED || targmode6 == IPMP_TARG_DISABLED)
        ofmt_output(arg, ih, &ifinfop->if_targinfo4);
    if (targmode6 != IPMP_TARG_DISABLED)
        ofmt_output(arg, ih, &ifinfop->if_targinfo6);
}

/*
 * Creates an ipmpstat_ofmt_t field list from the comma-separated list of
 * user-specified fields passed via `ofields'.  The table of known fields
 * (and their attributes) is passed via `fields'.
 */
static ipmpstat_ofmt_t *
ofmt_create(const char *ofields, ipmpstat_field_t fields[])
{
    char *token, *lasts, *ofields_dup;
    const char *fieldname;
    ipmpstat_ofmt_t *ofmt, *ofmt_head = NULL, *ofmt_tail;
    ipmpstat_field_t *fieldp;
    uint_t cols = 0;

    /*
     * If "-o" was omitted or "-o all" was specified, build a list of
     * field names.  If "-o" was omitted, stop building the list when
     * we run out of columns.
     */
    if (ofields == NULL || strcasecmp(ofields, "all") == 0) {
        for (fieldp = fields; fieldp->f_name != NULL; fieldp++) {
            cols += fieldp->f_width;
            if (ofields == NULL && cols > IPMPSTAT_NCOL)
                break;

            if ((ofmt = calloc(sizeof (*ofmt), 1)) == NULL)
                die("cannot allocate output format list");

            ofmt->o_field = fieldp;
            if (ofmt_head == NULL) {
                ofmt_head = ofmt;
                ofmt_tail = ofmt;
            } else {
                ofmt_tail->o_next = ofmt;
                ofmt_tail = ofmt;
            }
        }
        return (ofmt_head);
    }

    if ((ofields_dup = strdup(ofields)) == NULL)
        die("cannot allocate output format list");

    token = ofields_dup;
    while ((fieldname = strtok_r(token, ",", &lasts)) != NULL) {
        token = NULL;

        if ((fieldp = field_find(fields, fieldname)) == NULL) {
            /*
             * Since machine parsers are unlikely to be able to
             * gracefully handle missing fields, die if we're in
             * parsable mode.  Otherwise, just print a warning.
             */
            if (opt & IPMPSTAT_OPT_PARSABLE)
                die("unknown output field `%s'\n", fieldname);

            warn("ignoring unknown output field `%s'\n", fieldname);
            continue;
        }

        if ((ofmt = calloc(sizeof (*ofmt), 1)) == NULL)
            die("cannot allocate output format list");

        ofmt->o_field = fieldp;
        if (ofmt_head == NULL) {
            ofmt_head = ofmt;
            ofmt_tail = ofmt;
        } else {
            ofmt_tail->o_next = ofmt;
            ofmt_tail = ofmt;
        }
    }

    free(ofields_dup);
    if (ofmt_head == NULL)
        die("no valid output fields specified\n");

    return (ofmt_head);
}

/*
 * Destroys the provided `ofmt' field list.
 */
static void
ofmt_destroy(ipmpstat_ofmt_t *ofmt)
{
    ipmpstat_ofmt_t *ofmt_next;

    for (; ofmt != NULL; ofmt = ofmt_next) {
        ofmt_next = ofmt->o_next;
        free(ofmt);
    }
}

/*
 * Outputs a header for the fields named by `ofmt'.
 */
static void
ofmt_output_header(const ipmpstat_ofmt_t *ofmt)
{
    const ipmpstat_field_t *fieldp;

    for (; ofmt != NULL; ofmt = ofmt->o_next) {
        fieldp = ofmt->o_field;

        if (ofmt->o_next == NULL)
            (void) printf("%s", fieldp->f_name);
        else
            (void) printf("%-*s", fieldp->f_width, fieldp->f_name);
    }
    (void) printf("\n");
}

/*
 * Outputs one row of values for the fields named by `ofmt'.  The values to
 * output are obtained through the `ofmt' function pointers, which are
 * indirectly passed the `ih' and `arg' structures for state; see the block
 * comment at the start of this file for details.
 */
static void
ofmt_output(const ipmpstat_ofmt_t *ofmt, ipmp_handle_t ih, void *arg)
{
    int i;
    char buf[1024];
    boolean_t escsep;
    static int nrow;
    const char *value;
    uint_t width, valwidth;
    uint_t compress, overflow = 0;
    const ipmpstat_field_t *fieldp;
    ipmpstat_sfunc_arg_t sfunc_arg;

    /*
     * For each screenful of data, display the header.
     */
    if ((nrow++ % winsize.ws_row) == 0 && !(opt & IPMPSTAT_OPT_PARSABLE)) {
        ofmt_output_header(ofmt);
        nrow++;
    }

    /*
     * Check if we'll be displaying multiple fields per line, and thus
     * need to escape the field separator.
     */
    escsep = (ofmt != NULL && ofmt->o_next != NULL);

    for (; ofmt != NULL; ofmt = ofmt->o_next) {
        fieldp = ofmt->o_field;

        sfunc_arg.sa_ih = ih;
        sfunc_arg.sa_data = arg;

        buf[0] = '\0';
        (*fieldp->f_sfunc)(&sfunc_arg, buf, sizeof (buf));

        if (opt & IPMPSTAT_OPT_PARSABLE) {
            for (i = 0; buf[i] != '\0'; i++) {
                if (escsep && (buf[i] == ':' || buf[i] == '\\'))
                    (void) putchar('\\');
                (void) putchar(buf[i]);
            }
            if (ofmt->o_next != NULL)
                (void) putchar(':');
        } else {
            value = (buf[0] == '\0') ? "--" : buf;

            /*
             * To avoid needless line-wraps, for the last field,
             * don't include any trailing whitespace.
             */
            if (ofmt->o_next == NULL) {
                (void) printf("%s", value);
                continue;
            }

            /*
             * For other fields, grow the width as necessary to
             * ensure the value completely fits.  However, if
             * there's unused whitespace in subsequent fields,
             * then "compress" that whitespace to attempt to get
             * the columns to line up again.
             */
            width = fieldp->f_width;
            valwidth = strlen(value);

            if (valwidth + overflow >= width) {
                overflow += valwidth - width + 1;
                (void) printf("%s ", value);
                continue;
            }

            if (overflow > 0) {
                compress = MIN(overflow, width - valwidth);
                overflow -= compress;
                width -= compress;
            }
            (void) printf("%-*s", width, value);
        }
    }
    (void) printf("\n");

    /*
     * In case stdout has been redirected to e.g. a pipe, flush stdout so
     * that commands can act on our output immediately.
     */
    (void) fflush(stdout);
}

/*
 * Searches the `fields' array for a field matching `fieldname'.  Returns
 * a pointer to that field on success, or NULL on failure.
 */
static ipmpstat_field_t *
field_find(ipmpstat_field_t *fields, const char *fieldname)
{
    ipmpstat_field_t *fieldp;

    for (fieldp = fields; fieldp->f_name != NULL; fieldp++) {
        if (strcasecmp(fieldp->f_name, fieldname) == 0)
            return (fieldp);
    }
    return (NULL);
}

/*
 * Uses `enums' to map `enumval' to a string, and stores at most `bufsize'
 * bytes of that string into `buf'.
 */
static void
enum2str(const ipmpstat_enum_t *enums, int enumval, char *buf, uint_t bufsize)
{
    const ipmpstat_enum_t *enump;

    for (enump = enums; enump->e_name != NULL; enump++) {
        if (enump->e_val == enumval) {
            (void) strlcpy(buf, enump->e_name, bufsize);
            return;
        }
    }
    (void) snprintf(buf, bufsize, "<%d>", enumval);
}

/*
 * Stores the stringified value of the sockaddr_storage pointed to by `ssp'
 * into at most `bufsize' bytes of `buf'.
 */
static void
sockaddr2str(const struct sockaddr_storage *ssp, char *buf, uint_t bufsize)
{
    int flags = NI_NOFQDN;
    socklen_t socklen;
    struct sockaddr *sp = (struct sockaddr *)ssp;

    /*
     * Sadly, getnameinfo() does not allow the socklen to be oversized for
     * a given family -- so we must determine the exact size to pass to it.
     */
    switch (ssp->ss_family) {
    case AF_INET:
        socklen = sizeof (struct sockaddr_in);
        break;
    case AF_INET6:
        socklen = sizeof (struct sockaddr_in6);
        break;
    default:
        (void) strlcpy(buf, "?", bufsize);
        return;
    }

    if (opt & IPMPSTAT_OPT_NUMERIC)
        flags |= NI_NUMERICHOST;

    (void) getnameinfo(sp, socklen, buf, bufsize, NULL, 0, flags);
}

static void
sighandler(int sig)
{
    assert(sig == SIGWINCH);

    if (ioctl(1, TIOCGWINSZ, &winsize) == -1 ||
        winsize.ws_col == 0 || winsize.ws_row == 0) {
        winsize.ws_col = 80;
        winsize.ws_row = 24;
    }
}

static void
usage(void)
{
    const char *argstr = gettext("[-n] [-o <field> [-P]] -a|-g|-i|-p|-t");

    (void) fprintf(stderr, gettext("usage: %s %s\n"), progname, argstr);
    exit(EXIT_FAILURE);
}

/* PRINTFLIKE1 */
static void
warn(const char *format, ...)
{
    va_list alist;
    int error = errno;

    format = gettext(format);
    (void) fprintf(stderr, gettext("%s: warning: "), progname);

    va_start(alist, format);
    (void) vfprintf(stderr, format, alist);
    va_end(alist);

    if (strchr(format, '\n') == NULL)
        (void) fprintf(stderr, ": %s\n", strerror(error));
}

/* PRINTFLIKE2 */
static void
warn_ipmperr(int ipmperr, const char *format, ...)
{
    va_list alist;

    format = gettext(format);
    (void) fprintf(stderr, gettext("%s: warning: "), progname);

    va_start(alist, format);
    (void) vfprintf(stderr, format, alist);
    va_end(alist);

    (void) fprintf(stderr, ": %s\n", ipmp_errmsg(ipmperr));
}

/* PRINTFLIKE1 */
static void
die(const char *format, ...)
{
    va_list alist;
    int error = errno;

    format = gettext(format);
    (void) fprintf(stderr, "%s: ", progname);

    va_start(alist, format);
    (void) vfprintf(stderr, format, alist);
    va_end(alist);

    if (strchr(format, '\n') == NULL)
        (void) fprintf(stderr, ": %s\n", strerror(error));

    exit(EXIT_FAILURE);
}

/* PRINTFLIKE2 */
static void
die_ipmperr(int ipmperr, const char *format, ...)
{
    va_list alist;

    format = gettext(format);
    (void) fprintf(stderr, "%s: ", progname);

    va_start(alist, format);
    (void) vfprintf(stderr, format, alist);
    va_end(alist);
    (void) fprintf(stderr, ": %s\n", ipmp_errmsg(ipmperr));

    exit(EXIT_FAILURE);
}

static ipmpstat_field_t addr_fields[] = {
    { "ADDRESS",    26, sfunc_addr_address  },
    { "STATE",  7,  sfunc_addr_state    },
    { "GROUP",  12, sfunc_addr_group    },
    { "INBOUND",    12, sfunc_addr_inbound  },
    { "OUTBOUND",   23, sfunc_addr_outbound },
    { NULL,     0,  NULL            }
};

static ipmpstat_field_t group_fields[] = {
    { "GROUP",  12,     sfunc_group_ifname  },
    { "GROUPNAME",  12, sfunc_group_name    },
    { "STATE",  10, sfunc_group_state   },
    { "FDT",    10, sfunc_group_fdt     },
    { "INTERFACES", 30, sfunc_group_interfaces  },
    { NULL,     0,  NULL            }
};

static ipmpstat_field_t if_fields[] = {
    { "INTERFACE",  12, sfunc_if_name       },
    { "ACTIVE", 8,  sfunc_if_active     },
    { "GROUP",  12, sfunc_if_group      },
    { "FLAGS",  10, sfunc_if_flags      },
    { "LINK",   10, sfunc_if_link       },
    { "PROBE",  10, sfunc_if_probe      },
    { "STATE",  10,     sfunc_if_state      },
    { NULL,     0,  NULL            }
};

static ipmpstat_field_t probe_fields[] = {
    { "TIME",   10, sfunc_probe_time    },
    { "INTERFACE",  12, sfunc_probe_ifname  },
    { "PROBE",  7,  sfunc_probe_id      },
    { "NETRTT", 10, sfunc_probe_netrtt  },
    { "RTT",    10, sfunc_probe_rtt     },
    { "RTTAVG", 10, sfunc_probe_rttavg  },
    { "TARGET", 20, sfunc_probe_target  },
    { "RTTDEV", 10, sfunc_probe_rttdev  },
    { NULL,     0,  NULL            }
};

static ipmpstat_field_t targ_fields[] = {
    { "INTERFACE",  12, sfunc_targ_ifname   },
    { "MODE",   10, sfunc_targ_mode     },
    { "TESTADDR",   20, sfunc_targ_testaddr },
    { "TARGETS",    38, sfunc_targ_targets  },
    { NULL,     0,  NULL            }
};

static ipmpstat_enum_t  addr_state[] = {
    { "up",     IPMP_ADDR_UP            },
    { "down",   IPMP_ADDR_DOWN          },
    { NULL,     0               }
};

static ipmpstat_enum_t  group_state[] = {
    { "ok",     IPMP_GROUP_OK           },
    { "failed", IPMP_GROUP_FAILED       },
    { "degraded",   IPMP_GROUP_DEGRADED     },
    { NULL,     0               }
};

static ipmpstat_enum_t  if_link[] = {
    { "up",     IPMP_LINK_UP            },
    { "down",   IPMP_LINK_DOWN          },
    { "unknown",    IPMP_LINK_UNKNOWN       },
    { NULL,     0               }
};

static ipmpstat_enum_t  if_probe[] = {
    { "ok",     IPMP_PROBE_OK           },
    { "failed", IPMP_PROBE_FAILED       },
    { "unknown",    IPMP_PROBE_UNKNOWN      },
    { "disabled",   IPMP_PROBE_DISABLED     },
    { NULL,     0               }
};

static ipmpstat_enum_t  if_state[] = {
    { "ok",     IPMP_IF_OK          },
    { "failed", IPMP_IF_FAILED          },
    { "unknown",    IPMP_IF_UNKNOWN         },
    { "offline",    IPMP_IF_OFFLINE         },
    { NULL,     0               }
};

static ipmpstat_enum_t  targ_mode[] = {
    { "disabled",   IPMP_TARG_DISABLED      },
    { "routes", IPMP_TARG_ROUTES        },
    { "multicast",  IPMP_TARG_MULTICAST     },
    { NULL,     0               }
};