actube/src/cw/hdr_print.c

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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 <stdint.h>
#include <stdio.h>
#include "capwap.h"
#include "sock.h"
int hdr_print(char *str, uint8_t *packet, int len)
{
char *s = str;
if (len<1){
s+=sprintf(s,"\tNo info available.");
return s-str;
}
int preamble = cw_get_hdr_preamble(packet); //CWTH_GET_PREAMBLE(packet);
if (preamble==01){
s+=sprintf(s,"\tEncrypted data.");
return s-str;
}
if (preamble!=00){
s+=sprintf(s,"\tWrong CAPWAP version or encryption type.");
return s-str;
}
if (len < 4){
s+=sprintf(s,"\tNo more data. Packet too short.");
return s-str;
}
int hlen = cw_get_hdr_hlen(packet); //CWTH_GET_HLEN(packet);
int rid = cw_get_hdr_rid(packet);
int wbid = cw_get_hdr_wbid(packet);
s+=sprintf(s,"\tHLEN: %d, RID: %02X, WBID %02X",hlen,rid,wbid);
s+=sprintf(s," Flags: (T=%d,F=%d,L=%d,W=%d,M=%d,K=%d)\n",
cw_get_hdr_flag_t(packet),
cw_get_hdr_flag_f(packet),
cw_get_hdr_flag_l(packet),
cw_get_hdr_flag_w(packet),
cw_get_hdr_flag_m(packet),
cw_get_hdr_flag_k(packet)
);
if (cw_get_hdr_flag_m(packet)){
uint8_t * rmac = cw_get_hdr_rmac(packet);
s+=sprintf(s,"\tRadio MAC: %s\n",sock_hwaddr2str(bstr_data(rmac),
bstr_len(rmac)));
}
if (len < 8){
s+=sprintf(s,"\tNo more data. Packet too short.");
return s-str;
}
int frag_id = cw_get_hdr_fragid(packet);
int frag_offs = cw_get_hdr_fragoffset(packet);
s+=sprintf(s,"\tFrag Id: %d, Frag Offs:: %d\n",frag_id,frag_offs);
int bhlen = 4*hlen;
if (cw_get_hdr_flag_f(packet) && frag_offs!=0){
s+=sprintf(s,"\tFragment data ...");
return s-str;
}
if (len<bhlen+4){
s+=sprintf(s,"\tNo more data. Packet too short.");
return s-str;
}
int msgtype = ntohl(*((uint32_t*)(packet+bhlen)));
s+=sprintf(s,"\tMsgType: %d",msgtype);
if (len<bhlen+8){
s+=sprintf(s,"\n\tNo more data. Packet too short.");
return s-str;
}
int seqnum = (ntohl(*((uint32_t*)(packet+bhlen+4))))>>24;
int msgelemlen = 0xFF & ((ntohl(*((uint32_t*)(packet+bhlen+4))))>>8);
s+=sprintf(s,", SeqNum: %d, MsgelemLen:%d",seqnum,msgelemlen);
return s-str;
}