include/uapi/linux/netfilter/xt_tcpudp.h

Source file repositories/reference/linux-study-clean/include/uapi/linux/netfilter/xt_tcpudp.h

File Facts

System
Linux kernel
Corpus path
include/uapi/linux/netfilter/xt_tcpudp.h
Extension
.h
Size
1250 bytes
Lines
38
Domain
Core OS
Bucket
Core Kernel Interface
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

struct xt_tcp {
	__u16 spts[2];			/* Source port range. */
	__u16 dpts[2];			/* Destination port range. */
	__u8 option;			/* TCP Option iff non-zero*/
	__u8 flg_mask;			/* TCP flags mask byte */
	__u8 flg_cmp;			/* TCP flags compare byte */
	__u8 invflags;			/* Inverse flags */
};

/* Values for "inv" field in struct ipt_tcp. */
#define XT_TCP_INV_SRCPT	0x01	/* Invert the sense of source ports. */
#define XT_TCP_INV_DSTPT	0x02	/* Invert the sense of dest ports. */
#define XT_TCP_INV_FLAGS	0x04	/* Invert the sense of TCP flags. */
#define XT_TCP_INV_OPTION	0x08	/* Invert the sense of option test. */
#define XT_TCP_INV_MASK		0x0F	/* All possible flags. */

/* UDP matching stuff */
struct xt_udp {
	__u16 spts[2];			/* Source port range. */
	__u16 dpts[2];			/* Destination port range. */
	__u8 invflags;			/* Inverse flags */
};

/* Values for "invflags" field in struct ipt_udp. */
#define XT_UDP_INV_SRCPT	0x01	/* Invert the sense of source ports. */
#define XT_UDP_INV_DSTPT	0x02	/* Invert the sense of dest ports. */
#define XT_UDP_INV_MASK	0x03	/* All possible flags. */


#endif

Annotation

Implementation Notes