ng_socket.c File Reference

#include <sys/param.h>
#include <sys/domain.h>
#include <sys/hash.h>
#include <sys/kernel.h>
#include <sys/linker.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/epoch.h>
#include <sys/priv.h>
#include <sys/protosw.h>
#include <sys/queue.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/syscallsubr.h>
#include <sys/sysctl.h>
#include <net/vnet.h>
#include <netgraph/ng_message.h>
#include <netgraph/netgraph.h>
#include <netgraph/ng_socketvar.h>
#include <netgraph/ng_socket.h>

Include dependency graph for ng_socket.c:

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Data Structures
struct	ngsock

Macros
#define	M_NETGRAPH_PATH   M_NETGRAPH
#define	M_NETGRAPH_SOCK   M_NETGRAPH
#define	sotongpcb(so)   ((struct ngpcb *)(so)->so_pcb)
#define	TRAP_ERROR
#define	NGS_FLAG_NOLINGER   1 /* close with last hook */

Functions
static int	ng_attach_data (struct socket *so)
static int	ng_attach_cntl (struct socket *so)
static int	ng_attach_common (struct socket *so, int type)
static void	ng_detach_common (struct ngpcb *pcbp, int type)
static void	ng_socket_free_priv (struct ngsock *priv)
static int	ng_connect_data (struct sockaddr *nam, struct ngpcb *pcbp)
static int	ng_bind (struct sockaddr *nam, struct ngpcb *pcbp)
static int	ngs_mod_event (module_t mod, int event, void *data)
static void	ng_socket_item_applied (void *context, int error)
	NETGRAPH_INIT_ORDERED (socket, &typestruct, SI_SUB_PROTO_DOMAIN, SI_ORDER_ANY)
	SYSCTL_ULONG (_net_graph, OID_AUTO, maxdgram, CTLFLAG_RW, &ngpdg_sendspace, 0, "Maximum outgoing Netgraph datagram size")
	SYSCTL_ULONG (_net_graph, OID_AUTO, recvspace, CTLFLAG_RW, &ngpdg_recvspace, 0, "Maximum space for incoming Netgraph datagrams")
static	LIST_HEAD (ngpcb)
	LIST_HEAD (ngshash, hookpriv)
static int	ngc_attach (struct socket *so, int proto, struct thread *td)
static void	ngc_detach (struct socket *so)
static int	ngc_send (struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, struct mbuf *control, struct thread *td)
static int	ngc_bind (struct socket *so, struct sockaddr *nam, struct thread *td)
static int	ngc_connect (struct socket *so, struct sockaddr *nam, struct thread *td)
static int	ngd_attach (struct socket *so, int proto, struct thread *td)
static void	ngd_detach (struct socket *so)
static int	ngd_send (struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, struct mbuf *control, struct thread *td)
static int	ngd_connect (struct socket *so, struct sockaddr *nam, struct thread *td)
static int	ng_getsockaddr (struct socket *so, struct sockaddr **addr)
static int	ngs_constructor (node_p nodep)
static void	ngs_rehash (node_p node)
static int	ngs_newhook (node_p node, hook_p hook, const char *name)
static int	ngs_connect (hook_p hook)
static hook_p	ngs_findhook (node_p node, const char *name)
static int	ngs_rcvmsg (node_p node, item_p item, hook_p lasthook)
static int	ngs_rcvdata (hook_p hook, item_p item)
static int	ngs_disconnect (hook_p hook)
static int	ngs_shutdown (node_p node)
static int	dummy_disconnect (struct socket *so)
	DOMAIN_SET (ng)
	SYSCTL_INT (_net_graph, OID_AUTO, family, CTLFLAG_RD, SYSCTL_NULL_INT_PTR, AF_NETGRAPH, "")
static	SYSCTL_NODE (_net_graph, OID_AUTO, data, CTLFLAG_RW|CTLFLAG_MPSAFE, 0, "DATA")
	SYSCTL_INT (_net_graph_data, OID_AUTO, proto, CTLFLAG_RD, SYSCTL_NULL_INT_PTR, NG_DATA, "")
static	SYSCTL_NODE (_net_graph, OID_AUTO, control, CTLFLAG_RW|CTLFLAG_MPSAFE, 0, "CONTROL")
	SYSCTL_INT (_net_graph_control, OID_AUTO, proto, CTLFLAG_RD, SYSCTL_NULL_INT_PTR, NG_CONTROL, "")

Variables
static ng_constructor_t	ngs_constructor
static ng_rcvmsg_t	ngs_rcvmsg
static ng_shutdown_t	ngs_shutdown
static ng_newhook_t	ngs_newhook
static ng_connect_t	ngs_connect
static ng_findhook_t	ngs_findhook
static ng_rcvdata_t	ngs_rcvdata
static ng_disconnect_t	ngs_disconnect
static struct ng_type	typestruct
static u_long	ngpdg_sendspace = 20 * 1024
static u_long	ngpdg_recvspace = 20 * 1024
static struct pr_usrreqs	ngc_usrreqs
static struct pr_usrreqs	ngd_usrreqs
struct domain	ngdomain
static struct protosw	ngsw []

Macro Definition Documentation

M_NETGRAPH_PATH

#define M_NETGRAPH_PATH   M_NETGRAPH

Definition at line 82 of file ng_socket.c.

M_NETGRAPH_SOCK

#define M_NETGRAPH_SOCK   M_NETGRAPH

Definition at line 83 of file ng_socket.c.

NGS_FLAG_NOLINGER

#define NGS_FLAG_NOLINGER   1 /* close with last hook */

Definition at line 189 of file ng_socket.c.

sotongpcb

#define sotongpcb

(

so

)

((struct ngpcb *)(so)->so_pcb)

TRAP_ERROR

#define TRAP_ERROR

Function Documentation

DOMAIN_SET()

DOMAIN_SET

(

ng

)

dummy_disconnect()

static int dummy_disconnect ( struct socket *  so )

static

Definition at line 1127 of file ng_socket.c.

LIST_HEAD() [1/2]

static LIST_HEAD ( ngpcb  )

static

Definition at line 159 of file ng_socket.c.

LIST_HEAD() [2/2]

LIST_HEAD	(	ngshash	,
		hookpriv
	)

NETGRAPH_INIT_ORDERED()

NETGRAPH_INIT_ORDERED	(	socket	,
		&	typestruct,
		SI_SUB_PROTO_DOMAIN	,
		SI_ORDER_ANY
	)

ng_attach_cntl()

static int ng_attach_cntl ( struct socket *  so )

static

Definition at line 549 of file ng_socket.c.

References M_NETGRAPH_SOCK, ng_node::nd_ID, ng_attach_common(), NG_CONTROL, ng_detach_common(), ng_make_node_common(), NG_NODE_REF, NG_NODE_SET_PRIVATE, ngpcb::node_id, ngpcb::sockdata, sotongpcb, and typestruct.

Referenced by ngc_attach().

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ng_attach_common()

static int ng_attach_common ( struct socket *  so, int  type  )

static

Definition at line 605 of file ng_socket.c.

References ngpcb::ng_socket, ngpdg_recvspace, ngpdg_sendspace, type, and ngpcb::type.

Referenced by ng_attach_cntl(), and ng_attach_data().

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ng_attach_data()

static int ng_attach_data ( struct socket *  so )

static

Definition at line 595 of file ng_socket.c.

References ng_attach_common(), and NG_DATA.

Referenced by ngd_attach().

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ng_bind()

static int ng_bind ( struct sockaddr *  nam, struct ngpcb *  pcbp  )

static

Definition at line 758 of file ng_socket.c.

References ng_name_node(), NG_NODESIZ, sockaddr_ng::sg_data, sockaddr_ng::sg_len, ngpcb::sockdata, and TRAP_ERROR.

Referenced by ngc_bind().

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ng_connect_data()

static int ng_connect_data ( struct sockaddr *  nam, struct ngpcb *  pcbp  )

static

Definition at line 699 of file ng_socket.c.

References ng_item::el_dest, ngsock::error, ng_type::name, ng_node::nd_type, ng_address_path(), NG_FREE_ITEM, NG_NODE_PRIVATE, ng_package_data(), NG_SOCKET_NODE_TYPE, NG_WAITOK, ngpcb::node_id, sockaddr_ng::sg_data, and ngpcb::sockdata.

Referenced by ngd_connect().

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ng_detach_common()

static void ng_detach_common ( struct ngpcb *  pcbp, int  type  )

static

Definition at line 637 of file ng_socket.c.

References NG_CONTROL, NG_DATA, ngpcb::ng_socket, ng_socket_free_priv(), ngpcb::node_id, and ngpcb::sockdata.

Referenced by ng_attach_cntl(), ngc_detach(), and ngd_detach().

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ng_getsockaddr()

static int ng_getsockaddr ( struct socket *  so, struct sockaddr **  addr  )

static

Definition at line 505 of file ng_socket.c.

References ngsock::mtx, NG_NODE_HAS_NAME, NG_NODE_NAME, NG_NODESIZ, ngsock::node, sockaddr_ng::sg_data, sockaddr_ng::sg_family, sockaddr_ng::sg_len, ngpcb::sockdata, and sotongpcb.

ng_socket_free_priv()

static void ng_socket_free_priv ( struct ngsock *  priv )

static

Definition at line 671 of file ng_socket.c.

References M_NETGRAPH_SOCK, NG_NODE_UNREF, ng_rmnode_self(), and ngsock::node.

Referenced by ng_detach_common(), and ngs_shutdown().

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ng_socket_item_applied()

static void ng_socket_item_applied ( void *  context, int  error  )

static

Definition at line 1115 of file ng_socket.c.

References ngsock::error.

Referenced by ngc_send().

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ngc_attach()

static int ngc_attach ( struct socket *  so, int  proto, struct thread *  td  )

static

Definition at line 196 of file ng_socket.c.

References ng_attach_cntl(), and sotongpcb.

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ngc_bind()

static int ngc_bind ( struct socket *  so, struct sockaddr *  nam, struct thread *  td  )

static

Definition at line 366 of file ng_socket.c.

References ng_bind(), and sotongpcb.

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ngc_connect()

static int ngc_connect ( struct socket *  so, struct sockaddr *  nam, struct thread *  td  )

static

Definition at line 376 of file ng_socket.c.

ngc_detach()

static void ngc_detach ( struct socket *  so )

static

Definition at line 210 of file ng_socket.c.

References NG_CONTROL, ng_detach_common(), and sotongpcb.

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ngc_send()

static int ngc_send ( struct socket *  so, int  flags, struct mbuf *  m, struct sockaddr *  addr, struct mbuf *  control, struct thread *  td  )

static

Definition at line 219 of file ng_socket.c.

References ng_apply_info::apply, ng_item::apply, ng_mesg::ng_msghdr::cmd, ng_mesg::ng_msghdr::cmdstr, ng_apply_info::context, control, ng_mesg::data, ng_item::el_dest, ng_apply_info::error, ng_mesg::ng_msghdr::flags, ng_mesg::header, M_NETGRAPH_PATH, ng_type::name, ng_node::nd_ID, ng_node::nd_type, ng_address_path(), ng_findtype(), NG_NODE_PRIVATE, NG_NODESIZ, ng_package_msg(), ng_snd_item(), ng_socket_item_applied(), NG_TYPESIZ, NG_VERSION, NG_WAITOK, NGM_GENERIC_COOKIE, NGM_MKPEER, ngsock::node, SAVE_LINE, sockaddr_ng::sg_data, sockaddr_ng::sg_len, ngpcb::sockdata, sotongpcb, ng_mesg::ng_msghdr::token, ngm_mkpeer::type, ng_mesg::ng_msghdr::typecookie, and ng_mesg::ng_msghdr::version.

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ngd_attach()

static int ngd_attach ( struct socket *  so, int  proto, struct thread *  td  )

static

Definition at line 391 of file ng_socket.c.

References ng_attach_data(), and sotongpcb.

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ngd_connect()

static int ngd_connect ( struct socket *  so, struct sockaddr *  nam, struct thread *  td  )

static

Definition at line 492 of file ng_socket.c.

References ng_connect_data(), and sotongpcb.

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ngd_detach()

static void ngd_detach ( struct socket *  so )

static

Definition at line 401 of file ng_socket.c.

References NG_DATA, ng_detach_common(), and sotongpcb.

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ngd_send()

static int ngd_send ( struct socket *  so, int  flags, struct mbuf *  m, struct sockaddr *  addr, struct mbuf *  control, struct thread *  td  )

static

Definition at line 410 of file ng_socket.c.

References control, ng_findhook(), NG_FWD_ITEM_HOOK, NG_HOOKSIZ, NG_NODE_NUMHOOKS, NG_NODESIZ, ng_package_data(), NG_WAITOK, ngsock::node, sockaddr_ng::sg_data, sockaddr_ng::sg_len, ngpcb::sockdata, and sotongpcb.

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ngs_connect()

static int ngs_connect ( hook_p  hook )

static

Definition at line 846 of file ng_socket.c.

References NG_HOOK_NODE, NG_NODE_NUMHOOKS, NG_NODE_PRIVATE, and ngsock::node.

ngs_constructor()

static int ngs_constructor ( node_p  nodep )

static

Definition at line 784 of file ng_socket.c.

ngs_disconnect()

static int ngs_disconnect ( hook_p  hook )

static

Definition at line 1062 of file ng_socket.c.

References M_NETGRAPH_SOCK, NG_HOOK_NODE, NG_HOOK_PRIVATE, NG_NODE_IS_VALID, NG_NODE_NUMHOOKS, NG_NODE_PRIVATE, ng_rmnode_self(), NGS_FLAG_NOLINGER, and ngsock::node.

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ngs_findhook()

static hook_p ngs_findhook ( node_p  node, const char *  name  )

static

Definition at line 862 of file ng_socket.c.

References name, ng_node::nd_numhooks, NG_HOOK_NAME, NG_NODE_PRIVATE, and ngsock::node.

ngs_mod_event()

static int ngs_mod_event ( module_t  mod, int  event, void *  data  )

static

Definition at line 1200 of file ng_socket.c.

References event.

ngs_newhook()

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

static

Definition at line 823 of file ng_socket.c.

References M_NETGRAPH_SOCK, name, ng_node::nd_numhooks, NG_HOOK_SET_PRIVATE, NG_NODE_PRIVATE, ngs_rehash(), and ngsock::node.

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ngs_rcvdata()

static int ngs_rcvdata ( hook_p  hook, item_p  item  )

static

Definition at line 1012 of file ng_socket.c.

References NG_FREE_ITEM, NG_FREE_M, NG_HOOK_NAME, NG_HOOK_NODE, NG_HOOKSIZ, NG_NODE_PRIVATE, ngpcb::ng_socket, NGI_GET_M, sockaddr_ng::sg_data, sockaddr_ng::sg_family, sockaddr_ng::sg_len, and TRAP_ERROR.

ngs_rcvmsg()

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

static

Definition at line 897 of file ng_socket.c.

References ng_mesg::ng_msghdr::arglen, ng_mesg::ng_msghdr::cmd, ng_mesg::ng_msghdr::cmdstr, ng_mesg::ng_msghdr::flags, ng_mesg::header, NG_FREE_ITEM, NG_FREE_MSG, ng_ID_t, NG_NODE_PRIVATE, ngpcb::ng_socket, NGI_GET_MSG, NGI_RETADDR, NGM_SOCK_CMD_LINGER, NGM_SOCK_CMD_NOLINGER, NGM_SOCKET_COOKIE, NGS_FLAG_NOLINGER, ngsock::node, sockaddr_ng::sg_data, sockaddr_ng::sg_family, sockaddr_ng::sg_len, ng_mesg::ng_msghdr::token, TRAP_ERROR, and ng_mesg::ng_msghdr::typecookie.

ngs_rehash()

static void ngs_rehash ( node_p  node )

static

Definition at line 790 of file ng_socket.c.

References M_NETGRAPH_SOCK, NG_HOOK_NAME, NG_HOOK_PRIVATE, NG_NODE_PRIVATE, and ngsock::node.

Referenced by ngs_newhook().

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ngs_shutdown()

static int ngs_shutdown ( node_p  node )

static

Definition at line 1091 of file ng_socket.c.

References NG_NODE_PRIVATE, NG_NODE_SET_PRIVATE, NG_NODE_UNREF, ngpcb::ng_socket, ng_socket_free_priv(), and ngsock::node.

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SYSCTL_INT() [1/3]

SYSCTL_INT	(	_net_graph	,
		OID_AUTO	,
		family	,
		CTLFLAG_RD	,
		SYSCTL_NULL_INT_PTR	,
		AF_NETGRAPH	,
		""
	)

SYSCTL_INT() [2/3]

SYSCTL_INT	(	_net_graph_control	,
		OID_AUTO	,
		proto	,
		CTLFLAG_RD	,
		SYSCTL_NULL_INT_PTR	,
		NG_CONTROL	,
		""
	)

SYSCTL_INT() [3/3]

SYSCTL_INT	(	_net_graph_data	,
		OID_AUTO	,
		proto	,
		CTLFLAG_RD	,
		SYSCTL_NULL_INT_PTR	,
		NG_DATA	,
		""
	)

SYSCTL_NODE() [1/2]

static SYSCTL_NODE ( _net_graph  , OID_AUTO  , control  , CTLFLAG_RW|  CTLFLAG_MPSAFE, 0  , "CONTROL"    )

static

SYSCTL_NODE() [2/2]

static SYSCTL_NODE ( _net_graph  , OID_AUTO  , data  , CTLFLAG_RW|  CTLFLAG_MPSAFE, 0  , "DATA"    )

static

SYSCTL_ULONG() [1/2]

SYSCTL_ULONG	(	_net_graph	,
		OID_AUTO	,
		maxdgram	,
		CTLFLAG_RW	,
		&	ngpdg_sendspace,
		0	,
		"Maximum outgoing Netgraph datagram size"
	)

SYSCTL_ULONG() [2/2]

SYSCTL_ULONG	(	_net_graph	,
		OID_AUTO	,
		recvspace	,
		CTLFLAG_RW	,
		&	ngpdg_recvspace,
		0	,
		"Maximum space for incoming Netgraph datagrams"
	)

Variable Documentation

ngc_usrreqs

struct pr_usrreqs ngc_usrreqs

static

Initial value:

= {
        .pru_abort =            NULL,
        .pru_attach =           ngc_attach,
        .pru_bind =             ngc_bind,
        .pru_connect =          ngc_connect,
        .pru_detach =           ngc_detach,
        .pru_disconnect =       dummy_disconnect,
        .pru_peeraddr =         NULL,
        .pru_send =             ngc_send,
        .pru_shutdown =         NULL,
        .pru_sockaddr =         ng_getsockaddr,
        .pru_close =            NULL,
}

Definition at line 1137 of file ng_socket.c.

ngd_usrreqs

struct pr_usrreqs ngd_usrreqs

static

Initial value:

= {
        .pru_abort =            NULL,
        .pru_attach =           ngd_attach,
        .pru_bind =             NULL,
        .pru_connect =          ngd_connect,
        .pru_detach =           ngd_detach,
        .pru_disconnect =       dummy_disconnect,
        .pru_peeraddr =         NULL,
        .pru_send =             ngd_send,
        .pru_shutdown =         NULL,
        .pru_sockaddr =         ng_getsockaddr,
        .pru_close =            NULL,
}

Definition at line 1151 of file ng_socket.c.

ngdomain

struct domain ngdomain

Initial value:

= {
        .dom_family =           AF_NETGRAPH,
        .dom_name =             "netgraph",
        .dom_protosw =          ngsw,
        .dom_protoswNPROTOSW =  &ngsw[nitems(ngsw)]
}

Definition at line 1188 of file ng_socket.c.

ngpdg_recvspace

u_long ngpdg_recvspace = 20 * 1024

static

Definition at line 154 of file ng_socket.c.

Referenced by ng_attach_common().

ngpdg_sendspace

u_long ngpdg_sendspace = 20 * 1024

static

Definition at line 151 of file ng_socket.c.

Referenced by ng_attach_common().

ngs_connect

ng_connect_t ngs_connect

static

Definition at line 117 of file ng_socket.c.

ngs_constructor

ng_constructor_t ngs_constructor

static

Definition at line 113 of file ng_socket.c.

ngs_disconnect

ng_disconnect_t ngs_disconnect

static

Definition at line 120 of file ng_socket.c.

ngs_findhook

ng_findhook_t ngs_findhook

static

Definition at line 118 of file ng_socket.c.

ngs_newhook

ng_newhook_t ngs_newhook

static

Definition at line 116 of file ng_socket.c.

ngs_rcvdata

ng_rcvdata_t ngs_rcvdata

static

Definition at line 119 of file ng_socket.c.

ngs_rcvmsg

ng_rcvmsg_t ngs_rcvmsg

static

Definition at line 114 of file ng_socket.c.

ngs_shutdown

ng_shutdown_t ngs_shutdown

static

Definition at line 115 of file ng_socket.c.

ngsw

struct protosw ngsw[]

static

Initial value:

= {
{
        .pr_type =              SOCK_DGRAM,
        .pr_domain =            &ngdomain,
        .pr_protocol =          NG_CONTROL,
        .pr_flags =             PR_ATOMIC | PR_ADDR ,
        .pr_usrreqs =           &ngc_usrreqs
},
{
        .pr_type =              SOCK_DGRAM,
        .pr_domain =            &ngdomain,
        .pr_protocol =          NG_DATA,
        .pr_flags =             PR_ATOMIC | PR_ADDR,
        .pr_usrreqs =           &ngd_usrreqs
}
}

Definition at line 1171 of file ng_socket.c.

typestruct

struct ng_type typestruct

static

Initial value:

= {
        .version =      NG_ABI_VERSION,
        .name =         NG_SOCKET_NODE_TYPE,
        .mod_event =    ngs_mod_event,
        .constructor =  ngs_constructor,
        .rcvmsg =       ngs_rcvmsg,
        .shutdown =     ngs_shutdown,
        .newhook =      ngs_newhook,
        .connect =      ngs_connect,
        .findhook =     ngs_findhook,
        .rcvdata =      ngs_rcvdata,
        .disconnect =   ngs_disconnect,
}

Definition at line 135 of file ng_socket.c.

Referenced by ng_attach_cntl().