/*
* ng_message.h
*
* Copyright (c) 1996-1999 Whistle Communications, Inc.
* All rights reserved.
*
* Subject to the following obligations and disclaimer of warranty, use and
* redistribution of this software, in source or object code forms, with or
* without modifications are expressly permitted by Whistle Communications;
* provided, however, that:
* 1. Any and all reproductions of the source or object code must include the
* copyright notice above and the following disclaimer of warranties; and
* 2. No rights are granted, in any manner or form, to use Whistle
* Communications, Inc. trademarks, including the mark "WHISTLE
* COMMUNICATIONS" on advertising, endorsements, or otherwise except as
* such appears in the above copyright notice or in the software.
*
* THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
* TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
* REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
* INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
* WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
* REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
* SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
* IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
* RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
* WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
* PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* Author: Julian Elischer <julian@whistle.com>
*
* $FreeBSD: src/sys/netgraph/ng_message.h,v 1.4 1999/12/29 04:46:00 peter Exp $
* $Whistle: ng_message.h,v 1.12 1999/01/25 01:17:44 archie Exp $
*/
#ifndef _NETGRAPH_NG_MESSAGE_H_#define _NETGRAPH_NG_MESSAGE_H_ 1
/* ASCII string size limits */
#define NG_TYPELEN 15 /* max type name len (16 with null) */#define NG_HOOKLEN 15 /* max hook name len (16 with null) */#define NG_NODELEN 15 /* max node name len (16 with null) */#define NG_PATHLEN 511 /* max path len (512 with null) */#define NG_CMDSTRLEN 15 /* max command string (16 with null) */#define NG_TEXTRESPONSE 1024 /* allow this length for a text response */
/* A netgraph message */
struct ng_mesg {struct ng_msghdr {
u_char version; /* must == NG_VERSION */
u_char spare; /* pad to 2 bytes */
u_int16_t arglen; /* length of data */
u_int32_t flags; /* message status */
u_int32_t token; /* match with reply */
u_int32_t typecookie; /* node's type cookie */
u_int32_t cmd; /* command identifier */
u_char cmdstr[NG_CMDSTRLEN+1]; /* cmd string + \0 */
} header;
char data[0]; /* placeholder for actual data */
};
/* Keep this in sync with the above structure definition */
#define NG_GENERIC_NG_MESG_INFO(dtype) { \{ \
{ "version", &ng_parse_int8_type }, \
{ "spare", &ng_parse_int8_type }, \
{ "arglen", &ng_parse_int16_type }, \
{ "flags", &ng_parse_int32_type }, \
{ "token", &ng_parse_int32_type }, \
{ "typecookie", &ng_parse_int32_type }, \
{ "cmd", &ng_parse_int32_type }, \
{ "cmdstr", &ng_parse_cmdbuf_type }, \
{ "data", (dtype) }, \
{ NULL }, \
} \
}
/* Negraph type binary compatibility field */
#define NG_VERSION 2
/* Flags field flags */
#define NGF_ORIG 0x0000 /* the msg is the original request */#define NGF_RESP 0x0001 /* the message is a response */
/* Type of a unique node ID */
#define ng_ID_t unsigned int
/*
* Here we describe the "generic" messages that all nodes inherently
* understand. With the exception of NGM_TEXT_STATUS, these are handled
* automatically by the base netgraph code.
*/
/* Generic message type cookie */
#define NGM_GENERIC_COOKIE 851672668
/* Generic messages defined for this type cookie */
#define NGM_SHUTDOWN 1 /* shut down node */#define NGM_MKPEER 2 /* create and attach a peer node */#define NGM_CONNECT 3 /* connect two nodes */#define NGM_NAME 4 /* give a node a name */#define NGM_RMHOOK 5 /* break a connection btw. two nodes */#define NGM_NODEINFO 6 /* get nodeinfo for the target */#define NGM_LISTHOOKS 7 /* get list of hooks on node */#define NGM_LISTNAMES 8 /* list all globally named nodes */#define NGM_LISTNODES 9 /* list all nodes, named and unnamed */#define NGM_LISTTYPES 10 /* list all installed node types */#define NGM_TEXT_STATUS 11 /* (optional) get text status report */#define NGM_BINARY2ASCII 12 /* convert struct ng_mesg to ascii */#define NGM_ASCII2BINARY 13 /* convert ascii to struct ng_mesg */
/* Structure used for NGM_MKPEER */
struct ngm_mkpeer {char type[NG_TYPELEN + 1]; /* peer type */
char ourhook[NG_HOOKLEN + 1]; /* hook name */
char peerhook[NG_HOOKLEN + 1]; /* peer hook name */
};
/* Keep this in sync with the above structure definition */
#define NG_GENERIC_MKPEER_INFO() { \{ \
{ "type", &ng_parse_typebuf_type }, \
{ "ourhook", &ng_parse_hookbuf_type }, \
{ "peerhook", &ng_parse_hookbuf_type }, \
{ NULL }, \
} \
}
/* Structure used for NGM_CONNECT */
struct ngm_connect {char path[NG_PATHLEN + 1]; /* peer path */
char ourhook[NG_HOOKLEN + 1]; /* hook name */
char peerhook[NG_HOOKLEN + 1]; /* peer hook name */
};
/* Keep this in sync with the above structure definition */
#define NG_GENERIC_CONNECT_INFO() { \{ \
{ "path", &ng_parse_pathbuf_type }, \
{ "ourhook", &ng_parse_hookbuf_type }, \
{ "peerhook", &ng_parse_hookbuf_type }, \
{ NULL }, \
} \
}
/* Structure used for NGM_NAME */
struct ngm_name {char name[NG_NODELEN + 1]; /* node name */
};
/* Keep this in sync with the above structure definition */
#define NG_GENERIC_NAME_INFO() { \{ \
{ "name", &ng_parse_nodebuf_type }, \
{ NULL }, \
} \
}
/* Structure used for NGM_RMHOOK */
struct ngm_rmhook {char ourhook[NG_HOOKLEN + 1]; /* hook name */
};
/* Keep this in sync with the above structure definition */
#define NG_GENERIC_RMHOOK_INFO() { \{ \
{ "hook", &ng_parse_hookbuf_type }, \
{ NULL }, \
} \
}
/* Structure used for NGM_NODEINFO */
struct nodeinfo {char name[NG_NODELEN + 1]; /* node name (if any) */
char type[NG_TYPELEN + 1]; /* peer type */
ng_ID_t id; /* unique identifier */
u_int32_t hooks; /* number of active hooks */
};
/* Keep this in sync with the above structure definition */
#define NG_GENERIC_NODEINFO_INFO() { \{ \
{ "name", &ng_parse_nodebuf_type }, \
{ "type", &ng_parse_typebuf_type }, \
{ "id", &ng_parse_int32_type }, \
{ "hooks", &ng_parse_int32_type }, \
{ NULL }, \
} \
}
/* Structure used for NGM_LISTHOOKS */
struct linkinfo {char ourhook[NG_HOOKLEN + 1]; /* hook name */
char peerhook[NG_HOOKLEN + 1]; /* peer hook */
struct nodeinfo nodeinfo;
};
/* Keep this in sync with the above structure definition */
#define NG_GENERIC_LINKINFO_INFO(nitype) { \{ \
{ "ourhook", &ng_parse_hookbuf_type }, \
{ "peerhook", &ng_parse_hookbuf_type }, \
{ "nodeinfo", (nitype) }, \
{ NULL }, \
} \
}struct hooklist {struct nodeinfo nodeinfo; /* node information */
struct linkinfo link[0]; /* info about each hook */
};
/* Keep this in sync with the above structure definition */
#define NG_GENERIC_HOOKLIST_INFO(nitype,litype) { \{ \
{ "nodeinfo", (nitype) }, \
{ "linkinfo", (litype) }, \
{ NULL }, \
} \
}
/* Structure used for NGM_LISTNAMES/NGM_LISTNODES */
struct namelist {
u_int32_t numnames;
struct nodeinfo nodeinfo[0];
};
/* Keep this in sync with the above structure definition */
#define NG_GENERIC_LISTNODES_INFO(niarraytype) { \{ \
{ "numnames", &ng_parse_int32_type }, \
{ "nodeinfo", (niarraytype) }, \
{ NULL }, \
} \
}
/* Structure used for NGM_LISTTYPES */
struct typeinfo {char typename[NG_TYPELEN + 1]; /* name of type */
u_int32_t numnodes; /* number alive */
};
/* Keep this in sync with the above structure definition */
#define NG_GENERIC_TYPEINFO_INFO() { \{ \
{ "typename", &ng_parse_typebuf_type }, \
{ "typeinfo", &ng_parse_int32_type }, \
{ NULL }, \
} \
}struct typelist {
u_int32_t numtypes;
struct typeinfo typeinfo[0];
};
/* Keep this in sync with the above structure definition */
#define NG_GENERIC_TYPELIST_INFO(tiarraytype) { \{ \
{ "numtypes", &ng_parse_int32_type }, \
{ "typeinfo", (tiarraytype) }, \
{ NULL }, \
} \
}
/*
* For netgraph nodes that are somehow associated with file descriptors
* (e.g., a device that has a /dev entry and is also a netgraph node),
* we define a generic ioctl for requesting the corresponding nodeinfo
* structure and for assigning a name (if there isn't one already).
*
* For these to you need to also #include <sys/ioccom.h>.
*/
#define NGIOCGINFO _IOR('N', 40, struct nodeinfo) /* get node info */#define NGIOCSETNAME _IOW('N', 41, struct ngm_name) /* set node name */#ifdef _KERNEL
/*
* Allocate and initialize a netgraph message "msg" with "len"
* extra bytes of argument. Sets "msg" to NULL if fails.
* Does not initialize token.
*/
#define NG_MKMESSAGE(msg, cookie, cmdid, len, how) \do{ \
MALLOC((msg), struct ng_mesg *, sizeof(struct ng_mesg) \
+ (len), M_NETGRAPH, (how)); \
if ((msg) == NULL) \
break; \
bzero((msg), sizeof(struct ng_mesg) + (len)); \
(msg)->header.version = NG_VERSION; \
(msg)->header.typecookie = (cookie); \
(msg)->header.cmd = (cmdid); \
(msg)->header.arglen = (len); \
strncpy((msg)->header.cmdstr, #cmdid, \
sizeof((msg)->header.cmdstr) - 1); \
}while (0)
/*
* Allocate and initialize a response "rsp" to a message "msg"
* with "len" extra bytes of argument. Sets "rsp" to NULL if fails.
*/
#define NG_MKRESPONSE(rsp, msg, len, how) \do{ \
MALLOC((rsp), struct ng_mesg *, sizeof(struct ng_mesg) \
+ (len), M_NETGRAPH, (how)); \
if ((rsp) == NULL) \
break; \
bzero((rsp), sizeof(struct ng_mesg) + (len)); \
(rsp)->header.version = NG_VERSION; \
(rsp)->header.arglen = (len); \
(rsp)->header.token = (msg)->header.token; \
(rsp)->header.typecookie = (msg)->header.typecookie; \
(rsp)->header.cmd = (msg)->header.cmd; \
bcopy((msg)->header.cmdstr, (rsp)->header.cmdstr, \
sizeof((rsp)->header.cmdstr)); \
(rsp)->header.flags |= NGF_RESP; \
}while (0)
#endif /* _KERNEL */#endif /* _NETGRAPH_NG_MESSAGE_H_ */
