Merge branch 'vendor/LIBPCAP'
[dragonfly.git] / contrib / libpcap / pcap-common.h
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a85e14b0
PA
1
2/*
3 * We use the "receiver-makes-right" approach to byte order,
4 * because time is at a premium when we are writing the file.
5 * In other words, the pcap_file_header and pcap_pkthdr,
6 * records are written in host byte order.
7 * Note that the bytes of packet data are written out in the order in
8 * which they were received, so multi-byte fields in packets are not
9 * written in host byte order, they're written in whatever order the
10 * sending machine put them in.
11 *
12 * ntoh[ls] aren't sufficient because we might need to swap on a big-endian
13 * machine (if the file was written in little-end order).
14 */
15#define SWAPLONG(y) \
16((((y)&0xff)<<24) | (((y)&0xff00)<<8) | (((y)&0xff0000)>>8) | (((y)>>24)&0xff))
17#define SWAPSHORT(y) \
18 ( (((y)&0xff)<<8) | ((u_short)((y)&0xff00)>>8) )
19
20extern int dlt_to_linktype(int dlt);
21
22extern int linktype_to_dlt(int linktype);
23
24extern void swap_linux_usb_header(const struct pcap_pkthdr *hdr, u_char *buf,
25 int header_len_64_bytes);