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Hacked to read wrong Cisco WTP descriptors.

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FossilOrigin-Name: 4b2db21e5e1eda0d4ab51f9a119dc032b4e52175c37bbd4079358ad33446fbd1
This commit is contained in:
7u83@mail.ru 2014-07-27 10:33:42 +00:00
parent fac0563aaf
commit 0fbd7267e6
1 changed files with 33 additions and 5 deletions
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38
src/capwap/wtpinfo_readelem_wtp_descriptor.c
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@ -1,7 +1,27 @@
/*
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.h"
#include "wtpinfo.h" #include "wtpinfo.h"
#include "cw_util.h" #include "cw_util.h"
#include "cw_log.h"
int wtpinfo_readelem_wtp_descriptor(struct wtpinfo * wtpinfo, int type, uint8_t *msgelem, int len) int wtpinfo_readelem_wtp_descriptor(struct wtpinfo * wtpinfo, int type, uint8_t *msgelem, int len)
{ {
@ -15,8 +35,15 @@ int wtpinfo_readelem_wtp_descriptor(struct wtpinfo * wtpinfo, int type, uint8_t
wtpinfo->radios_in_use=*(msgelem+1); wtpinfo->radios_in_use=*(msgelem+1);
int ncrypt = *(msgelem+2); int ncrypt = *(msgelem+2);
int i;
int i=ncrypt*3+3; if (ncrypt == 0){
/* non-conform */
cw_log_debug1("Non-standard-conform WTP descriptor detected (See RFC 5415)");
i=4;
}
else{
i=ncrypt*3+3;
}
do { do {
if (i+8>=len) if (i+8>=len)
@ -30,11 +57,12 @@ int wtpinfo_readelem_wtp_descriptor(struct wtpinfo * wtpinfo, int type, uint8_t
i+=8; i+=8;
if (sublen+i>len){ if (sublen+i>len){
//printf("Wrong sublen ba %d\n",sublen); cw_log_debug1("WTP descriptor subelement too long, length = %d",sublen);
return -1; return -1;
} }
cw_log_debug2("Reading WTP descriptor subelement, type=%d,len=%d",subtype,sublen);
switch(subtype){ switch(subtype){
case CWMSGSUBELEM_WTP_DESCRIPTOR_HARDWARE_VERSION: case CWMSGSUBELEM_WTP_DESCRIPTOR_HARDWARE_VERSION:
wtpinfo->hardware_vendor_id=vendor_id; wtpinfo->hardware_vendor_id=vendor_id;
@ -49,7 +77,7 @@ int wtpinfo_readelem_wtp_descriptor(struct wtpinfo * wtpinfo, int type, uint8_t
cw_setstr(&wtpinfo->bootloader_version,msgelem+i,sublen); cw_setstr(&wtpinfo->bootloader_version,msgelem+i,sublen);
break; break;
default: default:
//printf("unknown !!!\n"); cw_log_debug1("Unknown WTP descriptor subelement, type = %d",subtype);
break; break;
} }
i+=sublen; i+=sublen;