ng_nat.c File Reference

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/mbuf.h>
#include <sys/malloc.h>
#include <sys/ctype.h>
#include <sys/errno.h>
#include <sys/syslog.h>
#include <netinet/in_systm.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>
#include <netinet/tcp.h>
#include <machine/in_cksum.h>
#include <net/dlt.h>
#include <net/ethernet.h>
#include <netinet/libalias/alias.h>
#include <netinet/libalias/alias_local.h>
#include <netgraph/ng_message.h>
#include <netgraph/ng_parse.h>
#include <netgraph/ng_nat.h>
#include <netgraph/netgraph.h>

Include dependency graph for ng_nat.c:

Go to the source code of this file.

Data Structures
struct	ng_nat_rdr_lst
struct	ng_nat_priv

Macros
#define	NGNAT_CONNECTED   0x1 /* We have both hooks connected */
#define	NGNAT_ADDR_DEFINED   0x2 /* NGM_NAT_SET_IPADDR happened */
#define	COPY(F)

Typedefs
typedef struct ng_nat_priv *	priv_p

Functions
static unsigned int	ng_nat_translate_flags (unsigned int x)
static int	ng_nat_listrdrs_ary_getLength (const struct ng_parse_type *type, const u_char *start, const u_char *buf)
	NETGRAPH_INIT (nat, &typestruct)
	MODULE_DEPEND (ng_nat, libalias, 1, 1, 1)
	STAILQ_HEAD (rdrhead, ng_nat_rdr_lst)
static int	ng_nat_constructor (node_p node)
static int	ng_nat_newhook (node_p node, hook_p hook, const char *name)
static int	ng_nat_rcvmsg (node_p node, item_p item, hook_p lasthook)
static int	ng_nat_rcvdata (hook_p hook, item_p item)
static int	ng_nat_shutdown (node_p node)
static int	ng_nat_disconnect (hook_p hook)

Variables
static ng_constructor_t	ng_nat_constructor
static ng_rcvmsg_t	ng_nat_rcvmsg
static ng_shutdown_t	ng_nat_shutdown
static ng_newhook_t	ng_nat_newhook
static ng_rcvdata_t	ng_nat_rcvdata
static ng_disconnect_t	ng_nat_disconnect
static const struct ng_parse_struct_field	ng_nat_mode_fields [] = NG_NAT_MODE_INFO
static const struct ng_parse_type	ng_nat_mode_type
static const struct ng_parse_fixedstring_info	ng_nat_description_info = { NG_NAT_DESC_LENGTH }
static const struct ng_parse_type	ng_nat_description_type
static const struct ng_parse_struct_field	ng_nat_redirect_port_fields [] = NG_NAT_REDIRECT_PORT_TYPE_INFO(&ng_nat_description_type)
static const struct ng_parse_type	ng_nat_redirect_port_type
static const struct ng_parse_struct_field	ng_nat_redirect_addr_fields [] = NG_NAT_REDIRECT_ADDR_TYPE_INFO(&ng_nat_description_type)
static const struct ng_parse_type	ng_nat_redirect_addr_type
static const struct ng_parse_struct_field	ng_nat_redirect_proto_fields [] = NG_NAT_REDIRECT_PROTO_TYPE_INFO(&ng_nat_description_type)
static const struct ng_parse_type	ng_nat_redirect_proto_type
static const struct ng_parse_struct_field	ng_nat_add_server_fields [] = NG_NAT_ADD_SERVER_TYPE_INFO
static const struct ng_parse_type	ng_nat_add_server_type
static const struct ng_parse_struct_field	ng_nat_listrdrs_entry_fields [] = NG_NAT_LISTRDRS_ENTRY_TYPE_INFO(&ng_nat_description_type)
static const struct ng_parse_type	ng_nat_listrdrs_entry_type
static const struct ng_parse_array_info	ng_nat_listrdrs_ary_info
static const struct ng_parse_type	ng_nat_listrdrs_ary_type
static const struct ng_parse_struct_field	ng_nat_list_redirects_fields [] = NG_NAT_LIST_REDIRECTS_TYPE_INFO(&ng_nat_listrdrs_ary_type)
static const struct ng_parse_type	ng_nat_list_redirects_type
static const struct ng_parse_struct_field	ng_nat_libalias_info_fields [] = NG_NAT_LIBALIAS_INFO
static const struct ng_parse_type	ng_nat_libalias_info_type
static const struct ng_cmdlist	ng_nat_cmdlist []
static struct ng_type	typestruct

Macro Definition Documentation

COPY

#define COPY

(

F

)

Value:

        do {                                            \
        if (priv->lib->F >= 0 && priv->lib->F < UINT32_MAX)     \
                i->F = priv->lib->F;                            \
        else                                                    \
                i->F = UINT32_MAX;                              \
} while (0)

NGNAT_ADDR_DEFINED

#define NGNAT_ADDR_DEFINED   0x2 /* NGM_NAT_SET_IPADDR happened */

Definition at line 303 of file ng_nat.c.

NGNAT_CONNECTED

#define NGNAT_CONNECTED   0x1 /* We have both hooks connected */

Definition at line 302 of file ng_nat.c.

Typedef Documentation

priv_p

typedef struct ng_nat_priv* priv_p

Definition at line 299 of file ng_nat.c.

Function Documentation

MODULE_DEPEND()

MODULE_DEPEND	(	ng_nat	,
		libalias	,
		1	,
		1	,
		1
	)

NETGRAPH_INIT()

NETGRAPH_INIT	(	nat	,
		&	typestruct
	)

ng_nat_constructor()

static int ng_nat_constructor ( node_p  node )

static

Definition at line 306 of file ng_nat.c.

References NG_NODE_FORCE_WRITER, NG_NODE_SET_PRIVATE, and ng_nat_priv::node.

ng_nat_disconnect()

static int ng_nat_disconnect ( hook_p  hook )

static

Definition at line 928 of file ng_nat.c.

References NG_HOOK_NODE, NG_NODE_PRIVATE, and ng_rmnode_self().

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ng_nat_listrdrs_ary_getLength()

static int ng_nat_listrdrs_ary_getLength ( const struct ng_parse_type *  type, const u_char *  start, const u_char *  buf  )

static

Definition at line 125 of file ng_nat.c.

References ng_nat_list_redirects::redirects, and ng_nat_list_redirects::total_count.

ng_nat_newhook()

static int ng_nat_newhook ( node_p  node, hook_p  hook, const char *  name  )

static

Definition at line 340 of file ng_nat.c.

References name, NG_NAT_HOOK_IN, NG_NAT_HOOK_OUT, NG_NODE_PRIVATE, NGNAT_CONNECTED, and ng_nat_priv::node.

ng_nat_rcvdata()

static int ng_nat_rcvdata ( hook_p  hook, item_p  item  )

static

Definition at line 755 of file ng_nat.c.

References NG_FREE_ITEM, NG_FWD_ITEM_HOOK, NG_HOOK_NODE, NG_NODE_PRIVATE, NGI_M, NGNAT_ADDR_DEFINED, and NGNAT_CONNECTED.

ng_nat_rcvmsg()

static int ng_nat_rcvmsg ( node_p  node, item_p  item, hook_p  lasthook  )

static

Definition at line 359 of file ng_nat.c.

References ng_nat_add_server::addr, ng_nat_redirect_port::alias_addr, ng_nat_redirect_addr::alias_addr, ng_nat_redirect_proto::alias_addr, ng_nat_redirect_port::alias_port, ng_mesg::ng_msghdr::arglen, ng_mesg::ng_msghdr::cmd, COPY, ng_mesg::data, ng_nat_redirect_port::description, ng_nat_redirect_addr::description, ng_nat_redirect_proto::description, ng_nat_mode::flags, ng_nat_libalias_info::fragmentIdLinkCount, ng_nat_libalias_info::fragmentPtrLinkCount, ng_mesg::header, ng_nat_libalias_info::icmpLinkCount, ng_nat_add_server::id, ng_nat_redirect_port::local_addr, ng_nat_redirect_addr::local_addr, ng_nat_redirect_proto::local_addr, ng_nat_redirect_port::local_port, ng_nat_mode::mask, NG_FREE_MSG, NG_MKRESPONSE, NG_NAT_DESC_LENGTH, NG_NAT_REDIRPROTO_ADDR, ng_nat_translate_flags(), NG_NODE_PRIVATE, NG_RESPOND_MSG, NGI_GET_MSG, NGM_NAT_ADD_SERVER, NGM_NAT_COOKIE, NGM_NAT_GET_DLT, NGM_NAT_LIBALIAS_INFO, NGM_NAT_LIST_REDIRECTS, NGM_NAT_PROXY_RULE, NGM_NAT_REDIRECT_ADDR, NGM_NAT_REDIRECT_DELETE, NGM_NAT_REDIRECT_DYNAMIC, NGM_NAT_REDIRECT_PORT, NGM_NAT_REDIRECT_PROTO, NGM_NAT_SET_DLT, NGM_NAT_SET_IPADDR, NGM_NAT_SET_MODE, NGM_NAT_SET_TARGET, NGNAT_ADDR_DEFINED, ng_nat_priv::node, ng_nat_add_server::port, ng_nat_libalias_info::pptpLinkCount, ng_nat_redirect_port::proto, ng_nat_redirect_proto::proto, ng_nat_libalias_info::protoLinkCount, ng_nat_list_redirects::redirects, ng_nat_redirect_port::remote_addr, ng_nat_redirect_proto::remote_addr, ng_nat_redirect_port::remote_port, ng_nat_libalias_info::sctpLinkCount, ng_nat_libalias_info::sockCount, ng_nat_libalias_info::tcpLinkCount, ng_nat_list_redirects::total_count, ng_mesg::ng_msghdr::typecookie, and ng_nat_libalias_info::udpLinkCount.

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ng_nat_shutdown()

static int ng_nat_shutdown ( node_p  node )

static

Definition at line 906 of file ng_nat.c.

References NG_NODE_PRIVATE, NG_NODE_SET_PRIVATE, and NG_NODE_UNREF.

ng_nat_translate_flags()

static unsigned int ng_nat_translate_flags ( unsigned int  x )

static

Definition at line 946 of file ng_nat.c.

References NG_NAT_DENY_INCOMING, NG_NAT_LOG, NG_NAT_PROXY_ONLY, NG_NAT_RESET_ON_ADDR_CHANGE, NG_NAT_REVERSE, NG_NAT_SAME_PORTS, NG_NAT_UNREGISTERED_CGN, and NG_NAT_UNREGISTERED_ONLY.

Referenced by ng_nat_rcvmsg().

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STAILQ_HEAD()

STAILQ_HEAD	(	rdrhead	,
		ng_nat_rdr_lst
	)

Variable Documentation

ng_nat_add_server_fields

const struct ng_parse_struct_field ng_nat_add_server_fields[] = NG_NAT_ADD_SERVER_TYPE_INFO

static

Definition at line 108 of file ng_nat.c.

ng_nat_add_server_type

const struct ng_parse_type ng_nat_add_server_type

static

Initial value:

= {
        &ng_parse_struct_type,
        &ng_nat_add_server_fields
}

Definition at line 110 of file ng_nat.c.

ng_nat_cmdlist

const struct ng_cmdlist ng_nat_cmdlist[]

static

Definition at line 162 of file ng_nat.c.

ng_nat_constructor

ng_constructor_t ng_nat_constructor

static

Definition at line 58 of file ng_nat.c.

ng_nat_description_info

const struct ng_parse_fixedstring_info ng_nat_description_info = { NG_NAT_DESC_LENGTH }

static

Definition at line 76 of file ng_nat.c.

ng_nat_description_type

const struct ng_parse_type ng_nat_description_type

static

Initial value:

= {
        &ng_parse_fixedstring_type,
        &ng_nat_description_info
}

Definition at line 78 of file ng_nat.c.

ng_nat_disconnect

ng_disconnect_t ng_nat_disconnect

static

Definition at line 63 of file ng_nat.c.

ng_nat_libalias_info_fields

const struct ng_parse_struct_field ng_nat_libalias_info_fields[] = NG_NAT_LIBALIAS_INFO

static

Definition at line 154 of file ng_nat.c.

ng_nat_libalias_info_type

const struct ng_parse_type ng_nat_libalias_info_type

static

Initial value:

= {
        &ng_parse_struct_type,
        &ng_nat_libalias_info_fields
}

Definition at line 156 of file ng_nat.c.

ng_nat_list_redirects_fields

const struct ng_parse_struct_field ng_nat_list_redirects_fields[] = NG_NAT_LIST_REDIRECTS_TYPE_INFO(&ng_nat_listrdrs_ary_type)

static

Definition at line 146 of file ng_nat.c.

ng_nat_list_redirects_type

const struct ng_parse_type ng_nat_list_redirects_type

static

Initial value:

= {
        &ng_parse_struct_type,
        &ng_nat_list_redirects_fields
}

Definition at line 148 of file ng_nat.c.

ng_nat_listrdrs_ary_info

const struct ng_parse_array_info ng_nat_listrdrs_ary_info

static

Initial value:

= {
        &ng_nat_listrdrs_entry_type,
        &ng_nat_listrdrs_ary_getLength,
        NULL
}

Definition at line 135 of file ng_nat.c.

ng_nat_listrdrs_ary_type

const struct ng_parse_type ng_nat_listrdrs_ary_type

static

Initial value:

= {
        &ng_parse_array_type,
        &ng_nat_listrdrs_ary_info
}

Definition at line 140 of file ng_nat.c.

ng_nat_listrdrs_entry_fields

const struct ng_parse_struct_field ng_nat_listrdrs_entry_fields[] = NG_NAT_LISTRDRS_ENTRY_TYPE_INFO(&ng_nat_description_type)

static

Definition at line 116 of file ng_nat.c.

ng_nat_listrdrs_entry_type

const struct ng_parse_type ng_nat_listrdrs_entry_type

static

Initial value:

= {
        &ng_parse_struct_type,
        &ng_nat_listrdrs_entry_fields
}

Definition at line 118 of file ng_nat.c.

ng_nat_mode_fields

const struct ng_parse_struct_field ng_nat_mode_fields[] = NG_NAT_MODE_INFO

static

Definition at line 68 of file ng_nat.c.

ng_nat_mode_type

const struct ng_parse_type ng_nat_mode_type

static

Initial value:

= {
        &ng_parse_struct_type,
        &ng_nat_mode_fields
}

Definition at line 70 of file ng_nat.c.

ng_nat_newhook

ng_newhook_t ng_nat_newhook

static

Definition at line 61 of file ng_nat.c.

ng_nat_rcvdata

ng_rcvdata_t ng_nat_rcvdata

static

Definition at line 62 of file ng_nat.c.

ng_nat_rcvmsg

ng_rcvmsg_t ng_nat_rcvmsg

static

Definition at line 59 of file ng_nat.c.

ng_nat_redirect_addr_fields

const struct ng_parse_struct_field ng_nat_redirect_addr_fields[] = NG_NAT_REDIRECT_ADDR_TYPE_INFO(&ng_nat_description_type)

static

Definition at line 92 of file ng_nat.c.

ng_nat_redirect_addr_type

const struct ng_parse_type ng_nat_redirect_addr_type

static

Initial value:

= {
        &ng_parse_struct_type,
        &ng_nat_redirect_addr_fields
}

Definition at line 94 of file ng_nat.c.

ng_nat_redirect_port_fields

const struct ng_parse_struct_field ng_nat_redirect_port_fields[] = NG_NAT_REDIRECT_PORT_TYPE_INFO(&ng_nat_description_type)

static

Definition at line 84 of file ng_nat.c.

ng_nat_redirect_port_type

const struct ng_parse_type ng_nat_redirect_port_type

static

Initial value:

= {
        &ng_parse_struct_type,
        &ng_nat_redirect_port_fields
}

Definition at line 86 of file ng_nat.c.

ng_nat_redirect_proto_fields

const struct ng_parse_struct_field ng_nat_redirect_proto_fields[] = NG_NAT_REDIRECT_PROTO_TYPE_INFO(&ng_nat_description_type)

static

Definition at line 100 of file ng_nat.c.

ng_nat_redirect_proto_type

const struct ng_parse_type ng_nat_redirect_proto_type

static

Initial value:

= {
        &ng_parse_struct_type,
        &ng_nat_redirect_proto_fields
}

Definition at line 102 of file ng_nat.c.

ng_nat_shutdown

ng_shutdown_t ng_nat_shutdown

static

Definition at line 60 of file ng_nat.c.

typestruct

struct ng_type typestruct

static

Initial value:

= {
        .version =      NG_ABI_VERSION,
        .name =         NG_NAT_NODE_TYPE,
        .constructor =  ng_nat_constructor,
        .rcvmsg =       ng_nat_rcvmsg,
        .shutdown =     ng_nat_shutdown,
        .newhook =      ng_nat_newhook,
        .rcvdata =      ng_nat_rcvdata,
        .disconnect =   ng_nat_disconnect,
        .cmdlist =      ng_nat_cmdlist,
}

Definition at line 265 of file ng_nat.c.