97 lines
2.3 KiB
C
97 lines
2.3 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 <string.h>
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#include "conn.h"
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#include "capwap.h"
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int conn_send_cwmsg(struct conn * conn, struct cwmsg * cwmsg)
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{
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uint32_t val;
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/* second dword of message control header */
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val = (cwmsg->seqnum<<24)|((cwmsg->pos+3)<<8);
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*((uint32_t*)(cwmsg->ctrlhdr+4))=htonl(val);
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// int msglen = cwmsg->ctrlhdr-cwmsg->buffer+cwmsg->pos;
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int msglen = cwmsg->pos+8;
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uint8_t * ptr = cwmsg->buffer;
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int fragoffset = 0;
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int hlen = cwmsg->hlen*4;
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// printf("Hlen is %i\n",hlen);
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int preamble = CW_VERSION | 0;
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int wbid=CWTH_WBID_IEEE80211;
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int packetlen = msglen+hlen;
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int mtu = conn->mtu;
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while (packetlen>mtu){
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val = (preamble << 24) | ((hlen/4)<<19) | (cwmsg->rid<<14) |(wbid<<9) |
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CWTH_FLAGS_T |
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CWTH_FLAGS_F |
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cwmsg->flags;
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*((uint32_t*)ptr)=htonl(val);
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// printf("setting frag id : %i\n",conn->fragid);
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val = conn->fragid<<16 | fragoffset<<3;
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// printf("VAAL: %08X\n",val);
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*((uint32_t*)(ptr+4))=htonl(val);
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// printf("Offset = %d\n",fragoffset);
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// if (conn_send_packet(conn,ptr,mtu)<0)
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// return -1;
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if (conn->write(conn,ptr,mtu)<0)
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return -1;
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ptr +=mtu-hlen;
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fragoffset+=(mtu-hlen)/8;
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packetlen-=mtu-hlen;
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// printf("Packelen=%d\n",packetlen);
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if (hlen>8)
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memcpy(ptr+8,cwmsg->ctrlhdr+8,hlen-8);
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}
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val = (preamble << 24) | ((hlen/4)<<19) | (cwmsg->rid<<14) |(wbid<<9) |
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CWTH_FLAGS_T|cwmsg->flags;
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if (fragoffset){
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val |= CWTH_FLAGS_F | CWTH_FLAGS_L;
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}
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// printf("Setting first byte %08X\n",val);
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*((uint32_t*)ptr)=htonl(val);
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val = conn->fragid<<16 | fragoffset<<3;
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*((uint32_t*)(ptr+4))=htonl(val);
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return conn->write(conn,ptr,msglen-fragoffset*8+hlen);
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}
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