network.h File Reference

#include <stdint.h>
#include <sys/types.h>

Include dependency graph for network.h:

This graph shows which files directly or indirectly include this file:

Data Structures
struct	nethdr
struct	nethdr_ack
struct	netattr
struct	nta_attr_natseqadj

Macros
#define	CONNTRACKD_PROTOCOL_VERSION   1
#define	NETHDR_SIZ   nethdr_align(sizeof(struct nethdr))
#define	NETHDR_DATA(x)   (struct netattr *)(((char *)x) + NETHDR_SIZ)
#define	NETHDR_TAIL(x)   (struct netattr *)(((char *)x) + x->len)
#define	NETHDR_ACK_SIZ   nethdr_align(sizeof(struct nethdr_ack))
#define	BUILD_NETMSG_FROM_CT(ct, query)
#define	BUILD_NETMSG_FROM_EXP(exp, query)
#define	IS_DATA(x)
#define	IS_ACK(x)   (x->type == NET_T_CTL && x->flags & NET_F_ACK)
#define	IS_NACK(x)   (x->type == NET_T_CTL && x->flags & NET_F_NACK)
#define	IS_RESYNC(x)   (x->type == NET_T_CTL && x->flags & NET_F_RESYNC)
#define	IS_ALIVE(x)   (x->type == NET_T_CTL && x->flags & NET_F_ALIVE)
#define	IS_HELLO(x)   (x->flags & NET_F_HELLO)
#define	IS_HELLO_BACK(x)   (x->flags & NET_F_HELLO_BACK)
#define	HDR_NETWORK2HOST(x)
#define	HDR_HOST2NETWORK(x)
#define	after(seq2, seq1)   before(seq1, seq2)
#define	ATTR_NETWORK2HOST(x)
#define	NTA_SIZE(len)   NTA_ALIGN(sizeof(struct netattr)) + len
#define	NTA_DATA(x)   (void *)(((char *)x) + NTA_ALIGN(sizeof(struct netattr)))
#define	NTA_NEXT(x, len)
#define	NTA_ALIGNTO   4
#define	NTA_ALIGN(len)   (((len) + NTA_ALIGNTO - 1) & ~(NTA_ALIGNTO - 1))
#define	NTA_LENGTH(len)   (NTA_ALIGN(sizeof(struct netattr)) + (len))
#define	NTA_LABELS_MAX_SIZE   (4096/sizeof(uint32_t))

Enumerations
enum	nethdr_type {   NET_T_STATE_CT_NEW = 0,   NET_T_STATE_CT_UPD,   NET_T_STATE_CT_DEL,   NET_T_STATE_EXP_NEW = 3,   NET_T_STATE_EXP_UPD,   NET_T_STATE_EXP_DEL,   NET_T_STATE_MAX = NET_T_STATE_EXP_DEL,   NET_T_CTL = 10 }
enum	{   NET_F_UNUSED = (1 << 0),   NET_F_RESYNC = (1 << 1),   NET_F_NACK = (1 << 2),   NET_F_ACK = (1 << 3),   NET_F_ALIVE = (1 << 4),   NET_F_HELLO = (1 << 5),   NET_F_HELLO_BACK = (1 << 6) }
enum	{   MSG_DATA,   MSG_CTL,   MSG_DROP,   MSG_BAD }
enum	{   SEQ_UNKNOWN,   SEQ_UNSET,   SEQ_IN_SYNC,   SEQ_AFTER,   SEQ_BEFORE }
enum	nta_attr {   NTA_IPV4 = 0,   NTA_IPV6,   NTA_L4PROTO,   NTA_PORT,   NTA_TCP_STATE = 4,   NTA_STATUS,   NTA_TIMEOUT,   NTA_MARK,   NTA_MASTER_IPV4 = 8,   NTA_MASTER_IPV6,   NTA_MASTER_L4PROTO,   NTA_MASTER_PORT,   NTA_SNAT_IPV4 = 12,   NTA_DNAT_IPV4,   NTA_SPAT_PORT,   NTA_DPAT_PORT,   NTA_NAT_SEQ_ADJ = 16,   NTA_SCTP_STATE,   NTA_SCTP_VTAG_ORIG,   NTA_SCTP_VTAG_REPL,   NTA_DCCP_STATE = 20,   NTA_DCCP_ROLE,   NTA_ICMP_TYPE,   NTA_ICMP_CODE,   NTA_ICMP_ID,   NTA_TCP_WSCALE_ORIG,   NTA_TCP_WSCALE_REPL,   NTA_HELPER_NAME,   NTA_LABELS,   NTA_MAX }
enum	nta_exp_attr {   NTA_EXP_MASTER_IPV4 = 0,   NTA_EXP_MASTER_IPV6,   NTA_EXP_MASTER_L4PROTO,   NTA_EXP_MASTER_PORT,   NTA_EXP_EXPECT_IPV4 = 4,   NTA_EXP_EXPECT_IPV6,   NTA_EXP_EXPECT_L4PROTO,   NTA_EXP_EXPECT_PORT,   NTA_EXP_MASK_IPV4 = 8,   NTA_EXP_MASK_IPV6,   NTA_EXP_MASK_L4PROTO,   NTA_EXP_MASK_PORT,   NTA_EXP_TIMEOUT,   NTA_EXP_FLAGS,   NTA_EXP_CLASS,   NTA_EXP_NAT_IPV4,   NTA_EXP_NAT_PORT,   NTA_EXP_NAT_L4PROTO,   NTA_EXP_NAT_DIR,   NTA_EXP_HELPER_NAME,   NTA_EXP_FN,   NTA_EXP_MAX }

Functions
int	nethdr_align (int len)
int	nethdr_size (int len)
void	nethdr_set (struct nethdr *net, int type)
void	nethdr_set_ack (struct nethdr *net)
void	nethdr_set_ctl (struct nethdr *net)
int	object_status_to_network_type (struct cache_object *obj)
int	nethdr_track_seq (uint32_t seq, uint32_t *exp_seq)
void	nethdr_track_update_seq (uint32_t seq)
int	nethdr_track_is_seq_set (void)
void	ct2msg (const struct nf_conntrack *ct, struct nethdr *n)
int	msg2ct (struct nf_conntrack *ct, struct nethdr *n, size_t remain)
void	exp2msg (const struct nf_expect *exp, struct nethdr *n)
int	msg2exp (struct nf_expect *exp, struct nethdr *n, size_t remain)

Macro Definition Documentation

#define after	(		seq2,
			seq1
	)		before(seq1, seq2)

Referenced by ip_set_range_to_cidr(), and nethdr_track_seq().

#define ATTR_NETWORK2HOST

(

x

)

Value:

({                                   \
    x->nta_len = ntohs(x->nta_len);                  \
    x->nta_attr = ntohs(x->nta_attr);                \
})

Referenced by msg2ct(), and msg2exp().

#define BUILD_NETMSG_FROM_CT	(		ct,
			query
	)

Value:

({                              \
    static char __net[4096];                \
	struct nethdr *__hdr = (struct nethdr *) __net;        \
    memset(__hdr, 0, NETHDR_SIZ);               \
	nethdr_set(__hdr, query);              \
	ct2msg(ct, __hdr);                 \
	HDR_HOST2NETWORK(__hdr);               \
    __hdr;                          \
})

#define BUILD_NETMSG_FROM_EXP	(		exp,
			query
	)

Value:

({                              \
    static char __net[4096];                \
	struct nethdr *__hdr = (struct nethdr *) __net;        \
    memset(__hdr, 0, NETHDR_SIZ);               \
	nethdr_set(__hdr, query);              \
	exp2msg(exp, __hdr);                   \
	HDR_HOST2NETWORK(__hdr);               \
    __hdr;                          \
})

#define CONNTRACKD_PROTOCOL_VERSION   1

#define HDR_HOST2NETWORK

(

x

)

Value:

({                                  \
    if (IS_ACK(x) || IS_NACK(x) || IS_RESYNC(x)) {          \
		struct nethdr_ack *__ack = (struct nethdr_ack *) x;   \
        __ack->from = htonl(__ack->from);           \
        __ack->to = htonl(__ack->to);               \
    }                               \
    x->len   = htons(x->len);                   \
    x->seq   = htonl(x->seq);                   \
})

#define HDR_NETWORK2HOST

(

x

)

Value:

({                                  \
    x->len   = ntohs(x->len);                   \
    x->seq   = ntohl(x->seq);                   \
    if (IS_ACK(x) || IS_NACK(x) || IS_RESYNC(x)) {          \
		struct nethdr_ack *__ack = (struct nethdr_ack *) x;   \
        __ack->from = ntohl(__ack->from);           \
        __ack->to = ntohl(__ack->to);               \
    }                               \
})

#define IS_ACK

(

x

)

(x->type == NET_T_CTL && x->flags & NET_F_ACK)

#define IS_ALIVE

(

x

)

(x->type == NET_T_CTL && x->flags & NET_F_ALIVE)

#define IS_DATA

(

x

)

Value:

(x->type <= NET_T_STATE_MAX && \
            (x->flags & ~(NET_F_HELLO | NET_F_HELLO_BACK)) == 0)

#define IS_HELLO

(

x

)

(x->flags & NET_F_HELLO)

#define IS_HELLO_BACK

(

x

)

(x->flags & NET_F_HELLO_BACK)

#define IS_NACK

(

x

)

(x->type == NET_T_CTL && x->flags & NET_F_NACK)

#define IS_RESYNC

(

x

)

(x->type == NET_T_CTL && x->flags & NET_F_RESYNC)

#define NETHDR_ACK_SIZ   nethdr_align(sizeof(struct nethdr_ack))

Referenced by nethdr_set_ack().

#define NETHDR_DATA

(

x

)

(struct netattr *)(((char *)x) + NETHDR_SIZ)

Referenced by msg2ct(), and msg2exp().

#define NETHDR_SIZ   nethdr_align(sizeof(struct nethdr))

Referenced by msg2ct(), msg2exp(), nethdr_set(), nethdr_set_ctl(), and nethdr_size().

#define NETHDR_TAIL

(

x

)

(struct netattr *)(((char *)x) + x->len)

#define NTA_ALIGN

(

len

)

(((len) + NTA_ALIGNTO - 1) & ~(NTA_ALIGNTO - 1))

#define NTA_ALIGNTO   4

#define NTA_DATA

(

x

)

(void *)(((char *)x) + NTA_ALIGN(sizeof(struct netattr)))

Referenced by msg2ct(), and msg2exp().

#define NTA_LABELS_MAX_SIZE   (4096/sizeof(uint32_t))

#define NTA_LENGTH

(

len

)

(NTA_ALIGN(sizeof(struct netattr)) + (len))

Referenced by msg2ct(), and msg2exp().

#define NTA_NEXT	(		x,
			len
	)

Value:

(                                         \
	len -= NTA_ALIGN(x->nta_len),                        \
    (struct netattr *)(((char *)x) + NTA_ALIGN(x->nta_len))           \
)

Referenced by msg2ct(), and msg2exp().

#define NTA_SIZE

(

len

)

NTA_ALIGN(sizeof(struct netattr)) + len

Enumeration Type Documentation

anonymous enum

Enumerator
NET_F_UNUSED
NET_F_RESYNC
NET_F_NACK
NET_F_ACK
NET_F_ALIVE
NET_F_HELLO
NET_F_HELLO_BACK

anonymous enum

Enumerator
MSG_DATA
MSG_CTL
MSG_DROP
MSG_BAD

anonymous enum

Enumerator
SEQ_UNKNOWN
SEQ_UNSET
SEQ_IN_SYNC
SEQ_AFTER
SEQ_BEFORE

enum nethdr_type

Enumerator
NET_T_STATE_CT_NEW
NET_T_STATE_CT_UPD
NET_T_STATE_CT_DEL
NET_T_STATE_EXP_NEW
NET_T_STATE_EXP_UPD
NET_T_STATE_EXP_DEL
NET_T_STATE_MAX
NET_T_CTL

enum nta_attr

Enumerator
NTA_IPV4
NTA_IPV6
NTA_L4PROTO
NTA_PORT
NTA_TCP_STATE
NTA_STATUS
NTA_TIMEOUT
NTA_MARK
NTA_MASTER_IPV4
NTA_MASTER_IPV6
NTA_MASTER_L4PROTO
NTA_MASTER_PORT
NTA_SNAT_IPV4
NTA_DNAT_IPV4
NTA_SPAT_PORT
NTA_DPAT_PORT
NTA_NAT_SEQ_ADJ
NTA_SCTP_STATE
NTA_SCTP_VTAG_ORIG
NTA_SCTP_VTAG_REPL
NTA_DCCP_STATE
NTA_DCCP_ROLE
NTA_ICMP_TYPE
NTA_ICMP_CODE
NTA_ICMP_ID
NTA_TCP_WSCALE_ORIG
NTA_TCP_WSCALE_REPL
NTA_HELPER_NAME
NTA_LABELS
NTA_MAX

enum nta_exp_attr

Enumerator
NTA_EXP_MASTER_IPV4
NTA_EXP_MASTER_IPV6
NTA_EXP_MASTER_L4PROTO
NTA_EXP_MASTER_PORT
NTA_EXP_EXPECT_IPV4
NTA_EXP_EXPECT_IPV6
NTA_EXP_EXPECT_L4PROTO
NTA_EXP_EXPECT_PORT
NTA_EXP_MASK_IPV4
NTA_EXP_MASK_IPV6
NTA_EXP_MASK_L4PROTO
NTA_EXP_MASK_PORT
NTA_EXP_TIMEOUT
NTA_EXP_FLAGS
NTA_EXP_CLASS
NTA_EXP_NAT_IPV4
NTA_EXP_NAT_PORT
NTA_EXP_NAT_L4PROTO
NTA_EXP_NAT_DIR
NTA_EXP_HELPER_NAME
NTA_EXP_FN
NTA_EXP_MAX

Function Documentation

void ct2msg	(	const struct nf_conntrack *	ct,
		struct nethdr *	n
	)

References ATTR_CONNLABELS, ATTR_GRP_MASTER_IPV4, ATTR_GRP_MASTER_IPV6, ATTR_GRP_MASTER_PORT, ATTR_GRP_ORIG_IPV4, ATTR_GRP_ORIG_IPV6, ATTR_HELPER_NAME, ATTR_L4PROTO, ATTR_MARK, ATTR_MASTER_L4PROTO, ATTR_REPL_IPV4_DST, ATTR_REPL_IPV4_SRC, ATTR_REPL_PORT_DST, ATTR_REPL_PORT_SRC, ATTR_STATUS, ATTR_TIMEOUT, CONFIG, nfct_attr_grp_is_set(), nfct_attr_is_set(), nfct_attr_is_set_array(), nfct_get_attr_u8(), nfct_getobjopt(), NFCT_GOPT_IS_DNAT, NFCT_GOPT_IS_DPAT, NFCT_GOPT_IS_SNAT, NFCT_GOPT_IS_SPAT, NTA_DNAT_IPV4, NTA_DPAT_PORT, NTA_HELPER_NAME, NTA_IPV4, NTA_IPV6, NTA_L4PROTO, NTA_MARK, NTA_MASTER_IPV4, NTA_MASTER_IPV6, NTA_MASTER_L4PROTO, NTA_MASTER_PORT, NTA_SNAT_IPV4, NTA_SPAT_PORT, NTA_STATUS, and NTA_TIMEOUT.

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void exp2msg	(	const struct nf_expect *	exp,
		struct nethdr *	n
	)

References ATTR_EXP_CLASS, ATTR_EXP_EXPECTED, ATTR_EXP_FLAGS, ATTR_EXP_FN, ATTR_EXP_HELPER_NAME, ATTR_EXP_MASK, ATTR_EXP_MASTER, ATTR_EXP_NAT_DIR, ATTR_EXP_NAT_TUPLE, ATTR_EXP_TIMEOUT, ATTR_GRP_ORIG_IPV4, ATTR_GRP_ORIG_IPV6, ATTR_L4PROTO, CONFIG, nfct_attr_grp_is_set(), nfct_get_attr_u8(), nfexp_attr_is_set(), nfexp_get_attr(), NTA_EXP_CLASS, NTA_EXP_EXPECT_IPV4, NTA_EXP_EXPECT_IPV6, NTA_EXP_EXPECT_L4PROTO, NTA_EXP_EXPECT_PORT, NTA_EXP_FLAGS, NTA_EXP_FN, NTA_EXP_HELPER_NAME, NTA_EXP_MASK_IPV4, NTA_EXP_MASK_IPV6, NTA_EXP_MASK_L4PROTO, NTA_EXP_MASK_PORT, NTA_EXP_MASTER_IPV4, NTA_EXP_MASTER_IPV6, NTA_EXP_MASTER_L4PROTO, NTA_EXP_MASTER_PORT, NTA_EXP_NAT_DIR, NTA_EXP_NAT_IPV4, NTA_EXP_NAT_L4PROTO, NTA_EXP_NAT_PORT, NTA_EXP_TIMEOUT, and NULL.

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int msg2ct	(	struct nf_conntrack *	ct,
		struct nethdr *	n,
		size_t	remain
	)

References ATTR_NETWORK2HOST, nethdr::len, len, ct_parser::max_size, NETHDR_DATA, NETHDR_SIZ, netattr::nta_attr, NTA_DATA, netattr::nta_len, NTA_LENGTH, NTA_MAX, NTA_NEXT, NULL, ct_parser::parse, ct_parser::parse2, ct_parser::size, and ssizeof.

int msg2exp	(	struct nf_expect *	exp,
		struct nethdr *	n,
		size_t	remain
	)

References ATTR_EXP_CLASS, ATTR_EXP_EXPECTED, ATTR_EXP_FLAGS, ATTR_EXP_FN, ATTR_EXP_HELPER_NAME, ATTR_EXP_MASK, ATTR_EXP_MASTER, ATTR_EXP_NAT_DIR, ATTR_EXP_NAT_TUPLE, ATTR_EXP_TIMEOUT, ATTR_NETWORK2HOST, nethdr::len, len, mask, nf_conntrack::master, NETHDR_DATA, NETHDR_SIZ, nfct_destroy(), nfct_new(), nfexp_set_attr(), netattr::nta_attr, NTA_DATA, netattr::nta_len, NTA_LENGTH, NTA_MAX, NTA_NEXT, NULL, and ssizeof.

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int nethdr_align

(

int

len

)

References NETHDR_ALIGNTO.

void nethdr_set	(	struct nethdr *	net,
		int	type
	)

References NETHDR_SIZ, nethdr::type, and type.

void nethdr_set_ack

(

struct nethdr *

net

)

References NETHDR_ACK_SIZ.

void nethdr_set_ctl

(

struct nethdr *

net

)

References NETHDR_SIZ.

int nethdr_size

(

int

len

)

References len, and NETHDR_SIZ.

int nethdr_track_is_seq_set

(

void

)

int nethdr_track_seq	(	uint32_t	seq,
		uint32_t *	exp_seq
	)

References after, error, SEQ_AFTER, SEQ_BEFORE, SEQ_IN_SYNC, SEQ_UNKNOWN, SEQ_UNSET, and STATE_SYNC.

void nethdr_track_update_seq

(

uint32_t

seq

)

References STATE_SYNC.

int object_status_to_network_type

(

struct cache_object *

obj

)

References cache_object::cache, cache_object::status, and cache::type.