sbin/ifconfig/agr.c

   1 /*      $NetBSD: agr.c,v 1.14 2008/07/15 20:56:13 dyoung Exp $  */
   2
   3 /*-
   4  * Copyright (c)2005 YAMAMOTO Takashi,
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 #include <sys/cdefs.h>
  30 #if !defined(lint)
  31 __RCSID("$NetBSD: agr.c,v 1.14 2008/07/15 20:56:13 dyoung Exp $");
  32 #endif /* !defined(lint) */
  33
  34 #include <sys/param.h>
  35 #include <sys/ioctl.h>
  36
  37 #include <net/if.h>
  38 #include <net/agr/if_agrioctl.h>
  39
  40 #include <ctype.h>
  41 #include <err.h>
  42 #include <errno.h>
  43 #include <string.h>
  44 #include <stdio.h>
  45 #include <stdlib.h>
  46 #include <util.h>
  47
  48 #include "env.h"
  49 #include "extern.h"
  50 #include "parse.h"
  51 #include "util.h"
  52
  53 static int agrsetport(prop_dictionary_t, prop_dictionary_t);
  54 static void agr_constructor(void) __attribute__((constructor));
  55 static int checkifname(prop_dictionary_t);
  56 static void assertifname(prop_dictionary_t);
  57
  58 static struct piface agrif = PIFACE_INITIALIZER(&agrif, "agr interface",
  59     agrsetport, "agrport", &command_root.pb_parser);
  60
  61 static const struct kwinst agrkw[] = {
  62           {.k_word = "agrport", .k_type = KW_T_INT, .k_int = AGRCMD_ADDPORT,
  63            .k_nextparser = &agrif.pif_parser}
  64         , {.k_word = "-agrport", .k_type = KW_T_INT, .k_int = AGRCMD_REMPORT,
  65            .k_nextparser = &agrif.pif_parser}
  66 };
  67
  68 struct pkw agr = PKW_INITIALIZER(&agr, "agr", NULL, "agrcmd",
  69     agrkw, __arraycount(agrkw), NULL);
  70
  71 static int
  72 checkifname(prop_dictionary_t env)
  73 {
  74         const char *ifname;
  75
  76         if ((ifname = getifname(env)) == NULL)
  77                 return 1;
  78
  79         return strncmp(ifname, "agr", 3) != 0 ||
  80             !isdigit((unsigned char)ifname[3]);
  81 }
  82
  83 static void
  84 assertifname(prop_dictionary_t env)
  85 {
  86         if (checkifname(env))
  87                 errx(EXIT_FAILURE, "valid only with agr(4) interfaces");
  88 }
  89
  90 int
  91 agrsetport(prop_dictionary_t env, prop_dictionary_t oenv)
  92 {
  93         char buf[IFNAMSIZ];
  94         struct agrreq ar;
  95         const char *port;
  96         int64_t cmd;
  97
  98         if (!prop_dictionary_get_int64(env, "agrcmd", &cmd)) {
  99                 warnx("%s.%d", __func__, __LINE__);
 100                 errno = ENOENT;
 101                 return -1;
 102         }
 103
 104         if (!prop_dictionary_get_cstring_nocopy(env, "agrport", &port)) {
 105                 warnx("%s.%d", __func__, __LINE__);
 106                 errno = ENOENT;
 107                 return -1;
 108         }
 109         strlcpy(buf, port, sizeof(buf));
 110
 111         assertifname(env);
 112         memset(&ar, 0, sizeof(ar));
 113         ar.ar_version = AGRREQ_VERSION;
 114         ar.ar_cmd = cmd;
 115         ar.ar_buf = buf;
 116         ar.ar_buflen = strlen(buf);
 117
 118         if (indirect_ioctl(env, SIOCSETAGR, &ar) == -1)
 119                 err(EXIT_FAILURE, "SIOCSETAGR");
 120         return 0;
 121 }
 122
 123 static void
 124 agr_status(prop_dictionary_t env, prop_dictionary_t oenv)
 125 {
 126         struct agrreq ar;
 127         void *buf = NULL;
 128         size_t buflen = 0;
 129         struct agrportlist *apl;
 130         struct agrportinfo *api;
 131         int i;
 132
 133         if (checkifname(env))
 134                 return;
 135
 136 again:
 137         memset(&ar, 0, sizeof(ar));
 138         ar.ar_version = AGRREQ_VERSION;
 139         ar.ar_cmd = AGRCMD_PORTLIST;
 140         ar.ar_buf = buf;
 141         ar.ar_buflen = buflen;
 142
 143         if (indirect_ioctl(env, SIOCGETAGR, &ar) == -1) {
 144                 if (errno != E2BIG) {
 145                         warn("SIOCGETAGR");
 146                         return;
 147                 }
 148
 149                 free(buf);
 150                 buf = NULL;
 151                 buflen = 0;
 152                 goto again;
 153         }
 154
 155         if (buf == NULL) {
 156                 buflen = ar.ar_buflen;
 157                 buf = malloc(buflen);
 158                 if (buf == NULL) {
 159                         err(EXIT_FAILURE, "agr_status");
 160                 }
 161                 goto again;
 162         }
 163
 164         apl = buf;
 165         api = (void *)(apl + 1);
 166
 167         for (i = 0; i < apl->apl_nports; i++) {
 168                 char tmp[256];
 169
 170                 snprintb(tmp, sizeof(tmp), AGRPORTINFO_BITS, api->api_flags);
 171                 printf("\tagrport: %s, flags=%s\n", api->api_ifname, tmp);
 172                 api++;
 173         }
 174 }
 175
 176 static status_func_t status;
 177 static usage_func_t usage;
 178 static cmdloop_branch_t branch;
 179
 180 static void
 181 agr_usage(prop_dictionary_t env)
 182 {
 183         fprintf(stderr, "\t[ agrport i ] [ -agrport i ]\n");
 184 }
 185
 186 static void
 187 agr_constructor(void)
 188 {
 189         status_func_init(&status, agr_status);
 190         usage_func_init(&usage, agr_usage);
 191         register_status(&status);
 192         register_usage(&usage);
 193         cmdloop_branch_init(&branch, &agr.pk_parser);
 194         register_cmdloop_branch(&branch);
 195 }