/* $NetBSD: wlanctl.c,v 1.14 2014/04/22 15:55:16 christos Exp $ */
/*-
* Copyright (c) 2005 David Young.  All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above
*    copyright notice, this list of conditions and the following
*    disclaimer in the documentation and/or other materials provided
*    with the distribution.
* 3. The name of David Young may not be used to endorse or promote
*    products derived from this software without specific prior
*    written permission.
*
* THIS SOFTWARE IS PROVIDED BY David Young ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL David
* Young BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*/
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <assert.h>

#include <sys/param.h>
#include <sys/sysctl.h>
#include <sys/inttypes.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/socket.h>

#include <net/if.h>
#include <net/if_media.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>

#include <net80211/ieee80211.h>
#include <net80211/ieee80211_sysctl.h>

struct flagname {
       u_int32_t fn_flag;
       const char *fn_name;
};

struct cmdflags {
       int     cf_a;   /* all 802.11 interfaces */
       int     cf_p;   /* public (i.e. non-private) dests */
};

static void             print_flags(u_int32_t, const struct flagname *, u_int);
static int              dump_nodes(const char *, int, struct cmdflags *);
static const char       *ether_string(u_int8_t *);
static void             parse_args(int *, char ***, struct cmdflags *);
static void             print_capinfo(u_int16_t);
static void             print_channel(u_int16_t, u_int16_t, u_int16_t);
static void             print_node_flags(u_int32_t);
static void             print_rateset(struct ieee80211_rateset *, int);
__dead static void      usage(void);

static void
print_rateset(struct ieee80211_rateset *rs, int txrate)
{
       int i, rate;
       const char *basic;

       printf("\trates");

       for (i = 0; i < rs->rs_nrates; i++) {

               if ((rs->rs_rates[i] & IEEE80211_RATE_BASIC) != 0)
                       basic = "*";
               else
                       basic = "";
               rate = 5 * (rs->rs_rates[i] & IEEE80211_RATE_VAL);
               if (i == txrate)
                       printf(" [%s%d.%d]", basic, rate / 10, rate % 10);
               else
                       printf(" %s%d.%d", basic, rate / 10, rate % 10);
       }
       printf("\n");
}

static void
print_flags(u_int32_t flags, const struct flagname *flagnames, u_int nname)
{
       u_int i;
       const char *delim;
       delim = "<";

       for (i = 0; i < nname; i++) {
               if ((flags & flagnames[i].fn_flag) != 0) {
                       printf("%s%s", delim, flagnames[i].fn_name);
                       delim = ",";
               }
       }

       printf("%s\n", (delim[0] == '<') ? "" : ">");
}

static void
print_node_flags(u_int32_t flags)
{
       static const struct flagname nodeflags[] = {
                 {IEEE80211_NODE_SYSCTL_F_BSS, "bss"}
               , {IEEE80211_NODE_SYSCTL_F_STA, "sta"}
               , {IEEE80211_NODE_SYSCTL_F_SCAN, "scan"}
       };
       printf("\tnode flags %04x", flags);

       print_flags(flags, nodeflags, __arraycount(nodeflags));
}

static void
print_capinfo(u_int16_t capinfo)
{
       static const struct flagname capflags[] = {
               {IEEE80211_CAPINFO_ESS, "ess"},
               {IEEE80211_CAPINFO_IBSS, "ibss"},
               {IEEE80211_CAPINFO_CF_POLLABLE, "cf pollable"},
               {IEEE80211_CAPINFO_CF_POLLREQ, "request cf poll"},
               {IEEE80211_CAPINFO_PRIVACY, "privacy"},
               {IEEE80211_CAPINFO_SHORT_PREAMBLE, "short preamble"},
               {IEEE80211_CAPINFO_PBCC, "pbcc"},
               {IEEE80211_CAPINFO_CHNL_AGILITY, "channel agility"},
               {IEEE80211_CAPINFO_SHORT_SLOTTIME, "short slot-time"},
               {IEEE80211_CAPINFO_RSN, "rsn"},
               {IEEE80211_CAPINFO_DSSSOFDM, "dsss-ofdm"}
       };

       printf("\tcapabilities %04x", capinfo);

       print_flags(capinfo, capflags, __arraycount(capflags));
}

static const char *
ether_string(u_int8_t *addr)
{
       struct ether_addr ea;
       (void)memcpy(ea.ether_addr_octet, addr, sizeof(ea.ether_addr_octet));
       return ether_ntoa(&ea);
}

static void
print_channel(u_int16_t chanidx, u_int16_t freq, u_int16_t flags)
{
       static const struct flagname chanflags[] = {
               {IEEE80211_CHAN_TURBO, "turbo"},
               {IEEE80211_CHAN_CCK, "cck"},
               {IEEE80211_CHAN_OFDM, "ofdm"},
               {IEEE80211_CHAN_2GHZ, "2.4GHz"},
               {IEEE80211_CHAN_5GHZ, "5GHz"},
               {IEEE80211_CHAN_PASSIVE, "passive scan"},
               {IEEE80211_CHAN_DYN, "dynamic cck-ofdm"},
               {IEEE80211_CHAN_GFSK, "gfsk"}
       };
       printf("\tchan %d freq %dMHz flags %04x", chanidx, freq, flags);

       print_flags(flags, chanflags, __arraycount(chanflags));
}

/*
*
* ifname:   dump nodes belonging to the given interface, or belonging
*           to all interfaces if NULL
* hdr_type: header type: IEEE80211_SYSCTL_T_NODE -> generic node,
*                        IEEE80211_SYSCTL_T_RSSADAPT -> rssadapt(9) info,
*                        IEEE80211_SYSCTL_T_DRVSPEC -> driver specific.
* cf:       command flags: cf_a != 0 -> all 802.11 interfaces
*                          cf_p != 0 -> public dests
*/
static int
dump_nodes(const char *ifname_arg, int hdr_type, struct cmdflags *cf)
{
#if 0
/*39*/  u_int8_t        ns_erp;         /* 11g only */
/*40*/  u_int32_t       ns_rstamp;      /* recv timestamp */
/*64*/  u_int16_t       ns_fhdwell;     /* FH only */
/*66*/  u_int8_t        ns_fhindex;     /* FH only */
/*68*/
#endif
       u_int i, ifindex;
       size_t namelen, nodes_len, totallen;
       int name[12];
       int *vname;
       char ifname[IFNAMSIZ];
       struct ieee80211_node_sysctl *pns, *ns;
       u_int64_t ts;

       namelen = __arraycount(name);

       if (sysctlnametomib("net.link.ieee80211.nodes", &name[0],
           &namelen) != 0) {
               warn("sysctlnametomib");
               return -1;
       }

       if (ifname_arg == NULL)
               ifindex = 0;
       else if ((ifindex = if_nametoindex(ifname_arg)) == 0) {
               warn("if_nametoindex");
               return -1;
       }

       totallen = namelen + IEEE80211_SYSCTL_NODENAMELEN;
       if (totallen >= __arraycount(name)) {
               warnx("Internal error finding sysctl mib");
               return -1;
       }
       vname = &name[namelen];

       vname[IEEE80211_SYSCTL_NODENAME_IF] = ifindex;
       vname[IEEE80211_SYSCTL_NODENAME_OP] = IEEE80211_SYSCTL_OP_ALL;
       vname[IEEE80211_SYSCTL_NODENAME_ARG] = 0;
       vname[IEEE80211_SYSCTL_NODENAME_TYPE] = hdr_type;
       vname[IEEE80211_SYSCTL_NODENAME_ELTSIZE] = sizeof(*ns);
       vname[IEEE80211_SYSCTL_NODENAME_ELTCOUNT] = INT_MAX;

       /* how many? */
       if (sysctl(name, totallen, NULL, &nodes_len, NULL, 0) != 0) {
               warn("sysctl(count)");
               return -1;
       }

       ns = malloc(nodes_len);

       if (ns == NULL) {
               warn("malloc");
               return -1;
       }

       vname[IEEE80211_SYSCTL_NODENAME_ELTCOUNT] = nodes_len / sizeof(ns[0]);

       /* Get them. */
       if (sysctl(name, totallen, ns, &nodes_len, NULL, 0) != 0) {
               warn("sysctl(get)");
               return -1;
       }

       for (i = 0; i < nodes_len / sizeof(ns[0]); i++) {
               pns = &ns[i];
               if (if_indextoname(pns->ns_ifindex, ifname) == NULL) {
                       warn("if_indextoname");
                       return -1;
               }
               if (cf->cf_p && (pns->ns_capinfo & IEEE80211_CAPINFO_PRIVACY))
                       continue;
               printf("%s: mac %s ", ifname, ether_string(pns->ns_macaddr));
               printf("bss %s\n", ether_string(pns->ns_bssid));
               print_node_flags(pns->ns_flags);

               /* TBD deal with binary ESSID */
               printf("\tess <%.*s>\n", pns->ns_esslen, pns->ns_essid);

               print_channel(pns->ns_chanidx, pns->ns_freq, pns->ns_chanflags);

               print_capinfo(pns->ns_capinfo);

               assert(sizeof(ts) == sizeof(pns->ns_tstamp));
               memcpy(&ts, &pns->ns_tstamp[0], sizeof(ts));
               printf("\tbeacon-interval %d TU tsft %" PRIu64 " us\n",
                   pns->ns_intval, (u_int64_t)le64toh(ts));

               print_rateset(&pns->ns_rates, pns->ns_txrate);

               printf("\tassoc-id %d assoc-failed %d inactivity %ds\n",
                   pns->ns_associd, pns->ns_fails, pns->ns_inact);

               printf("\trssi %d txseq %d rxseq %d\n",
                   pns->ns_rssi, pns->ns_txseq, pns->ns_rxseq);
       }
       return 0;
}

static void
usage(void)
{
       fprintf(stderr,
           "Usage: %s [ -p ] -a\n"
           "       %s [ -p ] interface [ interface ... ]\n",
           getprogname(), getprogname());
       exit(EXIT_FAILURE);
}

static void
parse_args(int *argcp, char ***argvp, struct cmdflags *cf)
{
       int ch;

       (void)memset(cf, 0, sizeof(*cf));

       while ((ch = getopt(*argcp, *argvp, "ap")) != -1) {
               switch (ch) {
               case 'a':
                       cf->cf_a = 1;
                       break;
               case 'p':
                       cf->cf_p = 1;
                       break;
               default:
                       warnx("unknown option -%c", ch);
                       usage();
               }
       }

       *argcp -= optind;
       *argvp += optind;
}

#define LOGICAL_XOR(x, y) (!(x) != !(y))

int
main(int argc, char **argv)
{
       int i;
       struct cmdflags cf;

       parse_args(&argc, &argv, &cf);

       if (!LOGICAL_XOR(argc > 0, cf.cf_a))
               usage();

       if (cf.cf_a) {
               if (dump_nodes(NULL, IEEE80211_SYSCTL_T_NODE, &cf) != 0)
                       return EXIT_FAILURE;
               return EXIT_SUCCESS;
       }
       for (i = 0; i < argc; i++) {
               if (dump_nodes(argv[i], IEEE80211_SYSCTL_T_NODE, &cf) != 0)
                       return EXIT_FAILURE;
       }

       return EXIT_SUCCESS;
}

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