113 lines
2.8 KiB
C
113 lines
2.8 KiB
C
/*
|
|
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 "wtpinfo.h"
|
|
|
|
#include "cw_util.h"
|
|
#include "cw_log.h"
|
|
|
|
|
|
|
|
|
|
static int wtpinfo_readelem_wtp_descriptor_(struct wtpinfo * wtpinfo, int type, uint8_t *msgelem, int len, int cq)
|
|
{
|
|
if (type != CWMSGELEM_WTP_DESCRIPTOR)
|
|
return 0;
|
|
|
|
if (len<6)
|
|
return -1;
|
|
|
|
wtpinfo->max_radios=*msgelem;
|
|
wtpinfo->radios_in_use=*(msgelem+1);
|
|
|
|
int ncrypt = *(msgelem+2);
|
|
int i;
|
|
if (ncrypt == 0 ){
|
|
/* non-conform */
|
|
cw_log_debug1("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_log_debug1("WTP descriptor subelement to long, length=%d>%d",i+8,len);
|
|
return -1;
|
|
}
|
|
|
|
uint32_t vendor_id=ntohl(*((uint32_t*)(msgelem+i)));
|
|
|
|
uint32_t val = ntohl(*((uint32_t*)(msgelem+i+4)));
|
|
int subtype= (val>>16)&0xffff;
|
|
int sublen = val&0xffff;
|
|
i+=8;
|
|
|
|
if (sublen+i>len){
|
|
cw_log_debug1("WTP descriptor subelement too long, length = %d",sublen);
|
|
return -1;
|
|
}
|
|
|
|
cw_log_debug2("Reading WTP descriptor subelement, type=%d,len=%d",subtype,sublen);
|
|
|
|
switch(subtype){
|
|
case CWMSGSUBELEM_WTP_DESCRIPTOR_HARDWARE_VERSION:
|
|
wtpinfo->hardware_vendor_id=vendor_id;
|
|
cw_setstr(&wtpinfo->hardware_version,msgelem+i,sublen);
|
|
wtpinfo->hardware_version_len=sublen;
|
|
break;
|
|
case CWMSGSUBELEM_WTP_DESCRIPTOR_SOFTWARE_VERSION:
|
|
wtpinfo->software_vendor_id=vendor_id;
|
|
cw_setstr(&wtpinfo->software_version,msgelem+i,sublen);
|
|
wtpinfo->software_version_len=sublen;
|
|
break;
|
|
case CWMSGSUBELEM_WTP_DESCRIPTOR_BOOTLOADER_VERSION:
|
|
wtpinfo->bootloader_vendor_id=vendor_id;
|
|
cw_setstr(&wtpinfo->bootloader_version,msgelem+i,sublen);
|
|
wtpinfo->bootloader_version_len=sublen;
|
|
break;
|
|
default:
|
|
cw_log_debug1("Unknown WTP descriptor subelement, type = %d",subtype);
|
|
break;
|
|
}
|
|
i+=sublen;
|
|
|
|
}while(i<len);
|
|
|
|
return 1;
|
|
}
|
|
|
|
int wtpinfo_readelem_wtp_descriptor(struct wtpinfo * wtpinfo, int type, uint8_t *msgelem, int len)
|
|
{
|
|
int rc =wtpinfo_readelem_wtp_descriptor_(wtpinfo, type, msgelem, len,0);
|
|
if (rc==-1){
|
|
cw_log_debug2("Bad wtp descriptor, trying cisco hack");
|
|
rc =wtpinfo_readelem_wtp_descriptor_(wtpinfo, type, msgelem, len,1);
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|