64 lines
2.2 KiB
C
64 lines
2.2 KiB
C
/*
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Copyright (c) 2013, Matthias Schiffer <mschiffer@universe-factory.net>
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _GMRF_PROTO_BABEL_PACKET_H_
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#define _GMRF_PROTO_BABEL_PACKET_H_
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#include "types.h"
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#include <alloca.h>
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#include <arpa/inet.h>
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#define GP_BABEL_VERSION 0
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struct __attribute__((packed)) gp_babel_packet {
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uint16_t version;
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uint16_t len;
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uint8_t tlv[];
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};
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struct gp_babel_packet_buf {
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size_t max_len;
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gp_babel_packet_t packet;
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};
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#define gp_babel_packet_alloca(size) ({ \
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gp_babel_packet_buf_t *__buf = alloca(sizeof(gp_babel_packet_buf_t) + size - sizeof(gp_babel_packet_t)); \
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__buf->max_len = size - sizeof(gp_babel_packet_t); \
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__buf->packet.version = htons(GP_BABEL_VERSION); \
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__buf->packet.len = 0; \
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__buf; \
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})
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static inline size_t gp_babel_packet_size(const gp_babel_packet_t *packet) {
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return sizeof(gp_babel_packet_t)+ntohs(packet->len);
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}
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#endif /* _GMRF_PROTO_BABEL_PACKET_H_ */
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