42 lines
1.1 KiB
C
42 lines
1.1 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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int capwap_parse_ctrlhdr(struct capwap_ctrlhdr * ch,uint8_t * msg, int len)
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{
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if (len<8)
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return 0;
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uint32_t val;
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ch->msgtype = ntohl(*((uint32_t*)(msg)))-CWIANA_ENTERPRISE_NUMBER*256;
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val = ntohl(*((uint32_t*)(msg+4)));
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ch->seqnum = CW_GET_DWORD_BITS(val,0,8);
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ch->msgelemslen=CW_GET_DWORD_BITS(val,8,16)-3;
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ch->flags=CW_GET_DWORD_BITS(val,24,8);
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ch->msgelems=msg+8;
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if (8+ch->msgelemslen != len)
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{
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return 0;
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}
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return 1;
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}
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