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Read WTP Desc.

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FossilOrigin-Name: 2a2806ef2d1fc790e2869d23e89b8bf8c26621559c0bd285851a9169e9df2ab9
This commit is contained in:
7u83@mail.ru 2015-04-14 05:48:52 +00:00
parent 3c831ae8b1
commit fb40c45300
1 changed files with 148 additions and 0 deletions
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148
src/capwap/cw_read_wtp_descriptor.c Normal file
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/*
This file is part of libcapwap.
libcapwap is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
libcapwap is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Foobar. If not, see <http://www.gnu.org/licenses/>.
*/
#include "capwap.h"
#include "capwap_items.h"
#include "wtpinfo.h"
#include "cw_util.h"
#include "dbg.h"
static int readelem_wtp_descriptor(struct conn *conn, struct cw_action_in *a,
uint8_t * data, int len, int cq)
{
if (len < 6) {
return 0;
}
cw_itemstore_t itemstore = conn->incomming;
cw_itemstore_set_byte(itemstore, CW_ITEM_WTP_MAX_RADIOS, cw_get_byte(data));
cw_itemstore_set_byte(itemstore, CW_ITEM_WTP_RADIOS_IN_USE,
cw_get_byte(data + 1));
int ncrypt = cw_get_byte(data + 2);
int i;
if (ncrypt == 0) {
/* non-conform */
cw_dbg(DBG_RFC,
"Non-standard-conform WTP descriptor detected (See RFC 5415)");
if (!cq)
i = 3;
else
i = 4;
} else {
i = ncrypt * 3 + 3;
}
do {
if (i + 8 > len) {
cw_dbg(DBG_ELEM_ERR,
"WTP descriptor subelement to long, length=%d>%d", i + 8,
len);
return 0;
}
uint32_t vendor_id = cw_get_dword(data + i); //ntohl(*((uint32_t*)(msgelem+i)));
uint32_t val = cw_get_dword(data + i + 4);
int subtype = (val >> 16) & 0xffff;
int sublen = val & 0xffff;
i += 8;
if (sublen + i > len) {
cw_dbg(DBG_ELEM_ERR,
"WTP Descriptor subelement too long, length = %d", sublen);
return 0;
}
cw_dbg(DBG_SUBELEM, "WTP Descriptor subtype=%d,len=%d", subtype, sublen);
switch (subtype) {
case CW_SUBELEM_WTP_HARDWARE_VERSION:
cw_itemstore_set_dword(itemstore,
CW_ITEM_WTP_HARDWARE_VENDOR,
vendor_id);
cw_itemstore_set_bstrn(itemstore,
CW_ITEM_WTP_HARDWARE_VERSION,
data + i, sublen);
break;
case CW_SUBELEM_WTP_SOFTWARE_VERSION:
cw_itemstore_set_dword(itemstore,
CW_ITEM_WTP_SOFTWARE_VENDOR,
vendor_id);
cw_itemstore_set_bstrn(itemstore,
CW_ITEM_WTP_SOFTWARE_VERSION,
data + i, sublen);
break;
case CW_SUBELEM_WTP_BOOTLOADER_VERSION:
cw_itemstore_set_dword(itemstore,
CW_ITEM_WTP_BOOTLOADER_VENDOR,
vendor_id);
cw_itemstore_set_bstrn(itemstore,
CW_ITEM_WTP_BOOTLOADER_VERSION,
data + i, sublen);
break;
default:
cw_dbg(DBG_ELEM_ERR,
"Unknown WTP descriptor subelement, type = %d",
subtype);
break;
}
i += sublen;
} while (i < len);
return 1;
}
int cw_in_wtp_descriptor(struct conn *conn, struct cw_action_in *a, uint8_t * data,
int len)
{
switch (conn->capwap_mode) {
case CW_MODE_STD:
{
int rc =
readelem_wtp_descriptor(conn, a, data, len,
CW_MODE_STD);
if (!rc) {
cw_dbg(DBG_ELEM_ERR, "Bad WTP descriptor from %s",
sock_addr2str(&conn->addr));
return 0;
}
return 1;
}
}
int rc = readelem_wtp_descriptor(conn, a, data, len, 0);
if (rc == -1) {
cw_dbg(DBG_RFC, "Bad WTP descriptor, trying cisco hack");
rc = readelem_wtp_descriptor(conn, a, data, len, 1);
}
return rc;
}