113 lines
2.9 KiB
C
113 lines
2.9 KiB
C
/*
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This file is part of libcapwap.
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libcapwap is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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libcapwap is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Foobar. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "capwap.h"
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#include "wtpinfo.h"
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#include "cw_util.h"
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#include "cw_log.h"
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static int wtpinfo_readelem_wtp_descriptor_(struct wtpinfo * wtpinfo, int type, uint8_t *msgelem, int len, int cq)
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{
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if (type != CWMSGELEM_WTP_DESCRIPTOR)
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return 0;
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if (len<6)
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return -1;
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wtpinfo->max_radios=*msgelem;
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wtpinfo->radios_in_use=*(msgelem+1);
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int ncrypt = *(msgelem+2);
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int i;
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if (ncrypt == 0 ){
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/* non-conform */
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cw_dbg(DBG_CW_RFC,"Non-standard-conform WTP descriptor detected (See RFC 5415)");
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if (!cq)
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i=3;
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else
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i=4;
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}
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else{
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i=ncrypt*3+3;
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}
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do {
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if (i+8>len)
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{
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cw_dbg(DBG_CW_MSG_ERR,"WTP descriptor subelement to long, length=%d>%d",i+8,len);
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return -1;
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}
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uint32_t vendor_id=ntohl(*((uint32_t*)(msgelem+i)));
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uint32_t val = ntohl(*((uint32_t*)(msgelem+i+4)));
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int subtype= (val>>16)&0xffff;
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int sublen = val&0xffff;
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i+=8;
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if (sublen+i>len){
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cw_dbg(DBG_CW_MSG_ERR,"WTP descriptor subelement too long, length = %d",sublen);
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return -1;
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}
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cw_dbg(DBG_CW_MSG,"Reading WTP descriptor subelement, type=%d,len=%d",subtype,sublen);
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switch(subtype){
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case CWMSGSUBELEM_WTP_DESCRIPTOR_HARDWARE_VERSION:
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wtpinfo->hardware_vendor_id=vendor_id;
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cw_setstr(&wtpinfo->hardware_version,msgelem+i,sublen);
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wtpinfo->hardware_version_len=sublen;
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break;
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case CWMSGSUBELEM_WTP_DESCRIPTOR_SOFTWARE_VERSION:
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wtpinfo->software_vendor_id=vendor_id;
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cw_setstr(&wtpinfo->software_version,msgelem+i,sublen);
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wtpinfo->software_version_len=sublen;
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break;
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case CWMSGSUBELEM_WTP_DESCRIPTOR_BOOTLOADER_VERSION:
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wtpinfo->bootloader_vendor_id=vendor_id;
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cw_setstr(&wtpinfo->bootloader_version,msgelem+i,sublen);
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wtpinfo->bootloader_version_len=sublen;
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break;
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default:
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cw_dbg(DBG_CW_MSG_ERR,"Unknown WTP descriptor subelement, type = %d",subtype);
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break;
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}
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i+=sublen;
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}while(i<len);
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return 1;
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}
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int wtpinfo_readelem_wtp_descriptor(struct wtpinfo * wtpinfo, int type, uint8_t *msgelem, int len)
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{
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int rc =wtpinfo_readelem_wtp_descriptor_(wtpinfo, type, msgelem, len,0);
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if (rc==-1){
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cw_dbg(DBG_CW_RFC,"Bad wtp descriptor, trying cisco hack");
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rc =wtpinfo_readelem_wtp_descriptor_(wtpinfo, type, msgelem, len,1);
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}
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return rc;
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}
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