Where Online Learning is simpler!

The C and C++ Include Header Files

/usr/include/linux/netfilter/xt_sctp.h


$ cat -n /usr/include/linux/netfilter/xt_sctp.h

     1	/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
     2	#ifndef _XT_SCTP_H_
     3	#define _XT_SCTP_H_
     4	
     5	#include <linux/types.h>
     6	
     7	#define XT_SCTP_SRC_PORTS	        0x01
     8	#define XT_SCTP_DEST_PORTS	        0x02
     9	#define XT_SCTP_CHUNK_TYPES		0x04
    10	
    11	#define XT_SCTP_VALID_FLAGS		0x07
    12	
    13	struct xt_sctp_flag_info {
    14		__u8 chunktype;
    15		__u8 flag;
    16		__u8 flag_mask;
    17	};
    18	
    19	#define XT_NUM_SCTP_FLAGS	4
    20	
    21	struct xt_sctp_info {
    22		__u16 dpts[2];  /* Min, Max */
    23		__u16 spts[2];  /* Min, Max */
    24	
    25		__u32 chunkmap[256 / sizeof (__u32)];  /* Bit mask of chunks to be matched according to RFC 2960 */
    26	
    27	#define SCTP_CHUNK_MATCH_ANY   0x01  /* Match if any of the chunk types are present */
    28	#define SCTP_CHUNK_MATCH_ALL   0x02  /* Match if all of the chunk types are present */
    29	#define SCTP_CHUNK_MATCH_ONLY  0x04  /* Match if these are the only chunk types present */
    30	
    31		__u32 chunk_match_type;
    32		struct xt_sctp_flag_info flag_info[XT_NUM_SCTP_FLAGS];
    33		int flag_count;
    34	
    35		__u32 flags;
    36		__u32 invflags;
    37	};
    38	
    39	#define bytes(type) (sizeof(type) * 8)
    40	
    41	#define SCTP_CHUNKMAP_SET(chunkmap, type) 		\
    42		do { 						\
    43			(chunkmap)[type / bytes(__u32)] |= 	\
    44				1u << (type % bytes(__u32));	\
    45		} while (0)
    46	
    47	#define SCTP_CHUNKMAP_CLEAR(chunkmap, type)		 	\
    48		do {							\
    49			(chunkmap)[type / bytes(__u32)] &= 		\
    50				~(1u << (type % bytes(__u32)));	\
    51		} while (0)
    52	
    53	#define SCTP_CHUNKMAP_IS_SET(chunkmap, type) 			\
    54	({								\
    55		((chunkmap)[type / bytes (__u32)] & 		\
    56			(1u << (type % bytes (__u32)))) ? 1: 0;	\
    57	})
    58	
    59	#define SCTP_CHUNKMAP_RESET(chunkmap) \
    60		memset((chunkmap), 0, sizeof(chunkmap))
    61	
    62	#define SCTP_CHUNKMAP_SET_ALL(chunkmap) \
    63		memset((chunkmap), ~0U, sizeof(chunkmap))
    64	
    65	#define SCTP_CHUNKMAP_COPY(destmap, srcmap) \
    66		memcpy((destmap), (srcmap), sizeof(srcmap))
    67	
    68	#define SCTP_CHUNKMAP_IS_CLEAR(chunkmap) \
    69		__sctp_chunkmap_is_clear((chunkmap), ARRAY_SIZE(chunkmap))
    70	static __inline__ _Bool
    71	__sctp_chunkmap_is_clear(const __u32 *chunkmap, unsigned int n)
    72	{
    73		unsigned int i;
    74		for (i = 0; i < n; ++i)
    75			if (chunkmap[i])
    76				return 0;
    77		return 1;
    78	}
    79	
    80	#define SCTP_CHUNKMAP_IS_ALL_SET(chunkmap) \
    81		__sctp_chunkmap_is_all_set((chunkmap), ARRAY_SIZE(chunkmap))
    82	static __inline__ _Bool
    83	__sctp_chunkmap_is_all_set(const __u32 *chunkmap, unsigned int n)
    84	{
    85		unsigned int i;
    86		for (i = 0; i < n; ++i)
    87			if (chunkmap[i] != ~0U)
    88				return 0;
    89		return 1;
    90	}
    91	
    92	#endif /* _XT_SCTP_H_ */
    93