/* * 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@freebsd.org> * * $FreeBSD: src/sys/netgraph/ng_message.h,v 1.4.2.5 2002/07/02 23:44:02 archie 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_ #ifndef _SYS_TYPES_H_ #include <sys/types.h> #endif #ifndef _SYS_IOCCOM_H_ #include <sys/ioccom.h> #endif /* ASCII string size limits */ #define NG_TYPESIZ 32 /* max type name len (including null) */ #define NG_HOOKSIZ 32 /* max hook name len (including null) */ #define NG_NODESIZ 32 /* max node name len (including null) */ #define NG_PATHSIZ 512 /* max path len (including null) */ #define NG_CMDSTRSIZ 32 /* max command string (including 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_CMDSTRSIZ]; /* cmd string */ } 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_uint8_type }, \ { "spare", &ng_parse_uint8_type }, \ { "arglen", &ng_parse_uint16_type }, \ { "flags", &ng_parse_hint32_type }, \ { "token", &ng_parse_uint32_type }, \ { "typecookie", &ng_parse_uint32_type }, \ { "cmd", &ng_parse_uint32_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 */ #define NGM_TEXT_CONFIG 14 /* (optional) get/set text config */ /* Structure used for NGM_MKPEER */ struct ngm_mkpeer { char type[NG_TYPESIZ]; /* peer type */ char ourhook[NG_HOOKSIZ]; /* hook name */ char peerhook[NG_HOOKSIZ]; /* 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_PATHSIZ]; /* peer path */ char ourhook[NG_HOOKSIZ]; /* hook name */ char peerhook[NG_HOOKSIZ]; /* 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_NODESIZ]; /* 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_HOOKSIZ]; /* 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_NODESIZ]; /* node name (if any) */ char type[NG_TYPESIZ]; /* 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_hint32_type }, \ { "hooks", &ng_parse_uint32_type }, \ { NULL } \ } /* Structure used for NGM_LISTHOOKS */ struct linkinfo { char ourhook[NG_HOOKSIZ]; /* hook name */ char peerhook[NG_HOOKSIZ]; /* 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_uint32_type }, \ { "nodeinfo", (niarraytype) }, \ { NULL } \ } /* Structure used for NGM_LISTTYPES */ struct typeinfo { char type_name[NG_TYPESIZ]; /* 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 }, \ { "numnodes", &ng_parse_uint32_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_uint32_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). */ #define NGIOCGINFO _IOR('N', 40, struct nodeinfo) /* get node info */ #if 0 /* unimplemented */ #define NGIOCSETNAME _IOW('N', 41, struct ngm_name) /* set node name */ #endif #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 { \ (msg) = kmalloc(sizeof(struct ng_mesg) + (len), M_NETGRAPH, \ (how) | M_ZERO); \ if ((msg) == NULL) \ break; \ (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 { \ (rsp) = kmalloc(sizeof(struct ng_mesg) + (len), M_NETGRAPH, \ (how) | M_ZERO); \ if ((rsp) == NULL) \ break; \ (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_ */
