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/*
* 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 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/types.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <dhcpagent_ipc.h>
#include <dhcp_inittab.h>
#include <dhcp_symbol.h>
#define DHCP_INFO_VENDOR_START_V4 256
#define DHCP_INFO_VENDOR_START_V6 65536
static void
usage(const char *program)
{
(void) fprintf(stderr,
"usage: %s [-c] [-i interface] [-n limit] [-v {4|6}] code\n"
" %s [-c] [-i interface] [-n limit] [-v {4|6}] identifier\n",
program, program);
exit(DHCP_EXIT_BADARGS);
}
int
main(int argc, char **argv)
{
ssize_t max_lines = -1;
size_t gran, n_spaces = 0;
dhcp_optnum_t optnum;
dhcp_ipc_request_t *request;
dhcp_ipc_reply_t *reply;
int c, error, i;
char *ifname = "";
char *value, *valuep;
dhcp_symbol_t *entry;
DHCP_OPT *opt;
size_t opt_len;
boolean_t is_canonical = B_FALSE;
long version = 4;
boolean_t isv6;
uint8_t *valptr;
while ((c = getopt(argc, argv, "ci:n:v:")) != EOF) {
switch (c) {
case 'c':
is_canonical = B_TRUE;
break;
case 'i':
ifname = optarg;
break;
case 'n':
max_lines = strtoul(optarg, NULL, 0);
break;
case 'v':
version = strtol(optarg, NULL, 0);
if (version != 4 && version != 6)
usage(argv[0]);
break;
case '?':
usage(argv[0]);
default:
break;
}
}
if (argc - optind != 1)
usage(argv[0]);
/*
* we either have a code or an identifer. if we have a code,
* then values over 256 indicate a vendor option. if we have
* an identifier, then use inittab_getbyname() to turn the
* identifier into a code, then send the request over the wire.
*/
isv6 = (version == 6);
if (isalpha(*argv[optind])) {
entry = inittab_getbyname(ITAB_CAT_SITE | ITAB_CAT_STANDARD |
ITAB_CAT_VENDOR | ITAB_CAT_FIELD |
(isv6 ? ITAB_CAT_V6 : 0), ITAB_CONS_INFO,
argv[optind]);
if (entry == NULL) {
(void) fprintf(stderr, "%s: unknown identifier `%s'\n",
argv[0], argv[optind]);
return (DHCP_EXIT_BADARGS);
}
optnum.code = entry->ds_code;
optnum.category = entry->ds_category;
} else {
ulong_t start;
optnum.code = strtoul(argv[optind], 0, 0);
optnum.category = ITAB_CAT_STANDARD | ITAB_CAT_SITE;
/*
* sigh. this is a hack, but it's needed for backward
* compatibility with the CA dhcpinfo program.
*/
start = isv6 ? DHCP_INFO_VENDOR_START_V6 :
DHCP_INFO_VENDOR_START_V4;
if (optnum.code > start) {
optnum.code -= start;
optnum.category = ITAB_CAT_VENDOR;
}
if (isv6)
optnum.category |= ITAB_CAT_V6;
entry = inittab_getbycode(optnum.category, ITAB_CONS_INFO,
optnum.code);
if (entry == NULL) {
(void) fprintf(stderr, "%s: unknown code `%s'\n",
argv[0], argv[optind]);
return (DHCP_EXIT_BADARGS);
}
optnum.category = entry->ds_category;
}
optnum.size = entry->ds_max * inittab_type_to_size(entry);
/*
* send the request to the agent and reap the reply
*/
request = dhcp_ipc_alloc_request(DHCP_GET_TAG | (isv6 ? DHCP_V6 : 0),
ifname, &optnum, sizeof (dhcp_optnum_t), DHCP_TYPE_OPTNUM);
if (request == NULL)
return (DHCP_EXIT_SYSTEM);
error = dhcp_ipc_make_request(request, &reply, DHCP_IPC_WAIT_DEFAULT);
if (error != 0 || reply->return_code != 0) {
if (error == 0)
error = reply->return_code;
(void) fprintf(stderr, "%s: %s\n", argv[0],
dhcp_ipc_strerror(error));
if (error == DHCP_IPC_E_TIMEOUT)
return (DHCP_EXIT_TIMEOUT);
return (DHCP_EXIT_FAILURE);
}
opt = dhcp_ipc_get_data(reply, &opt_len, NULL);
/*
* no data means that the client has an ACK but has no information
* about the specified option; return success
*/
if (opt_len == 0)
return (DHCP_EXIT_SUCCESS);
/*
* check for protocol error
*/
if (isv6) {
dhcpv6_option_t d6o;
if (opt_len < sizeof (d6o))
return (DHCP_EXIT_FAILURE);
(void) memcpy(&d6o, opt, sizeof (d6o));
if (opt_len != ntohs(d6o.d6o_len) + sizeof (d6o))
return (DHCP_EXIT_FAILURE);
valptr = (uint8_t *)opt + sizeof (d6o);
opt_len -= sizeof (d6o);
} else {
if (opt_len < 2 || (opt_len - 2 != opt->len))
return (DHCP_EXIT_FAILURE);
opt_len -= 2;
valptr = opt->value;
}
if (is_canonical) {
value = malloc(opt_len * (sizeof ("0xNN") + 1));
if (value == NULL) {
(void) fprintf(stderr, "%s: out of memory\n", argv[0]);
return (DHCP_EXIT_FAILURE);
}
for (i = 0, valuep = value; i < opt_len; i++)
valuep += sprintf(valuep, "0x%02X ", valptr[i]);
valuep[-1] = '\0';
gran = 1;
} else {
value = inittab_decode(entry, valptr, opt_len, B_TRUE);
if (value == NULL) {
(void) fprintf(stderr, "%s: cannot decode agent's "
"reply\n", argv[0]);
return (DHCP_EXIT_FAILURE);
}
gran = entry->ds_gran;
}
/*
* now display `gran' items per line, printing at most `max_lines'.
*/
for (i = 0; value[i] != '\0'; i++) {
if (value[i] == ' ') {
if ((++n_spaces % gran) == 0) {
value[i] = '\n';
if (max_lines != -1 && --max_lines == 0) {
value[i] = '\0';
break;
}
}
}
}
(void) printf("%s\n", value);
return (DHCP_EXIT_SUCCESS);
}
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