38 lines
1.1 KiB
C
38 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 <string.h>
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#include "capwap.h"
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#include "conn.h"
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#include "cwmsg.h"
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void cwmsg_addelem_mtu_discovery_padding(struct cwmsg * msg, struct conn* conn)
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{
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int len = conn->mtu - (msg->msgelems-msg->buffer+msg->pos)-4;
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if (len < 0 )
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return;
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uint32_t val = CWMSGELEM_MTU_DISCOVERY_PADDING<<16|len;
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*((uint32_t*)(msg->msgelems+msg->pos))=htonl(val);
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memset(msg->msgelems+4+msg->pos,0xff,len);
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msg->pos+=4+len;
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}
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