1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _LINUX_DCCP_H
3#define _LINUX_DCCP_H
4
5#include <uapi/linux/dccp.h>
6
7static inline struct dccp_hdr_ext *dccp_hdrx(const struct dccp_hdr *dh)
8{
9 return (struct dccp_hdr_ext *)((unsigned char *)dh + sizeof(*dh));
10}
11
12static inline unsigned int __dccp_basic_hdr_len(const struct dccp_hdr *dh)
13{
14 return sizeof(*dh) + (dh->dccph_x ? sizeof(struct dccp_hdr_ext) : 0);
15}
16
17static inline __u64 dccp_hdr_seq(const struct dccp_hdr *dh)
18{
19 __u64 seq_nr = ntohs(dh->dccph_seq);
20
21 if (dh->dccph_x != 0)
22 seq_nr = (seq_nr << 32) + ntohl(dccp_hdrx(dh)->dccph_seq_low);
23 else
24 seq_nr += (u32)dh->dccph_seq2 << 16;
25
26 return seq_nr;
27}
28
29static inline unsigned int __dccp_hdr_len(const struct dccp_hdr *dh)
30{
31 return __dccp_basic_hdr_len(dh) +
32 dccp_packet_hdr_len(type: dh->dccph_type);
33}
34
35#endif /* _LINUX_DCCP_H */
36