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freebsd/sys/netgraph/ng_message.h

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/*
* 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>
*
* $FreeBSD$
* $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; /* == NGM_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 */
};
/* this command is guaranteed to not alter data or'd into the command */
#define NGM_READONLY 0x10000000
/* 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 } \
}
/*
* Netgraph message header compatibility field
* Interfaces within the kernel are defined by a different
* value (see NG_ABI_VERSION in netgraph.g)
*/
#define NG_VERSION 5
/* Flags field flags */
#define NGF_ORIG 0x00000000 /* the msg is the original request */
#define NGF_RESP 0x00000001 /* 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 977674408
/* 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|NGM_READONLY)/* get nodeinfo for target */
#define NGM_LISTHOOKS (7|NGM_READONLY)/* get list of hooks on node */
#define NGM_LISTNAMES (8|NGM_READONLY)/* list globally named nodes */
#define NGM_LISTNODES (9|NGM_READONLY)/* list nodes, named & not */
#define NGM_LISTTYPES (10|NGM_READONLY)/* list installed node types */
#define NGM_TEXT_STATUS (11|NGM_READONLY)/* (optional) get txt status */
#define NGM_BINARY2ASCII (12|NGM_READONLY)/* convert ng_mesg to ascii */
#define NGM_ASCII2BINARY (13|NGM_READONLY)/* convert ascii to ng_mesg */
#define NGM_TEXT_CONFIG 14 /* (optional) get/set text config */
/*
* Flow control and intra node control messages.
* These are routed between nodes to allow flow control and to allow
* events to be passed around the graph.
* There will be some form of default handling for these but I
* do not yet know what it is..
*/
/* Generic message type cookie */
#define NGM_FLOW_COOKIE 851672669 /* temp for debugging */
/* Upstream messages */
#define NGM_LINK_IS_UP 32 /* e.g. carrier found - no data */
#define NGM_LINK_IS_DOWN 33 /* carrier lost, includes queue state */
#define NGM_HIGH_WATER_PASSED 34 /* includes queue state */
#define NGM_LOW_WATER_PASSED 35 /* includes queue state */
#define NGM_SYNC_QUEUE_STATE 36 /* sync response from sending packet */
/* Downstream messages */
#define NGM_DROP_LINK 41 /* drop DTR, etc. - stay in the graph */
#define NGM_RAISE_LINK 42 /* if you previously dropped it */
#define NGM_FLUSH_QUEUE 43 /* no data */
#define NGM_GET_BANDWIDTH (44|NGM_READONLY) /* either real or measured */
#define NGM_SET_XMIT_Q_LIMITS 45 /* includes queue state */
#define NGM_GET_XMIT_Q_LIMITS (46|NGM_READONLY) /* returns queue state */
#define NGM_MICROMANAGE 47 /* We want sync. queue state
reply for each packet sent */
#define NGM_SET_FLOW_MANAGER 48 /* send flow control here */
/* 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_hint32_type }, \
{ "hooks", &ng_parse_uint32_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_uint32_type }, \
{ "nodeinfo", (niarraytype) }, \
{ NULL } \
}
/* Structure used for NGM_LISTTYPES */
struct typeinfo {
char type_name[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 }, \
{ "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 } \
}
struct ngm_bandwidth {
u_int64_t nominal_in;
u_int64_t seen_in;
u_int64_t nominal_out;
u_int64_t seen_out;
};
/* Keep this in sync with the above structure definition */
#define NG_GENERIC_BANDWIDTH_INFO() { \
{ "nominal_in", &ng_parse_uint64_type }, \
{ "seen_in", &ng_parse_uint64_type }, \
{ "nominal_out", &ng_parse_uint64_type }, \
{ "seen_out", &ng_parse_uint64_type }, \
{ NULL } \
}
/*
* Information about a node's 'output' queue.
* This is NOT the netgraph input queueing mechanism,
* but rather any queue the node may implement internally
* This has to consider ALTQ if we are to work with it.
* As far as I can see, ALTQ counts PACKETS, not bytes.
* If ALTQ has several queues and one has passed a watermark
* we should have the priority of that queue be real (and not -1)
* XXX ALTQ stuff is just an idea.....
*/
struct ngm_queue_state {
u_int queue_priority; /* maybe only low-pri is full. -1 = all*/
u_int max_queuelen_bytes;
u_int max_queuelen_packets;
u_int low_watermark;
u_int high_watermark;
u_int current;
};
/* Keep this in sync with the above structure definition */
#define NG_GENERIC_QUEUE_INFO() { \
{ "max_queuelen_bytes", &ng_parse_uint_type }, \
{ "max_queuelen_packets", &ng_parse_uint_type }, \
{ "high_watermark", &ng_parse_uint_type }, \
{ "low_watermark", &ng_parse_uint_type }, \
{ "current", &ng_parse_uint_type }, \
{ NULL } \
}
/* Tell a node who to send async flow control info to. */
struct flow_manager {
ng_ID_t id; /* unique identifier */
};
/* Keep this in sync with the above structure definition */
#define NG_GENERIC_FLOW_MANAGER_INFO() { \
{ "id", &ng_parse_hint32_type }, \
{ 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 { \
KASSERT(!(how & M_DONTWAIT), \
("NG_MKMESSAGE() with how=M_DONTWAIT (%d)\n", how)); \
KASSERT(!(how & M_TRYWAIT), \
("NG_MKMESSAGE() with how=M_TRYWAIT (%d)\n", how)); \
MALLOC((msg), struct ng_mesg *, sizeof(struct ng_mesg) \
+ (len), M_NETGRAPH_MSG, (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 { \
MALLOC((rsp), struct ng_mesg *, sizeof(struct ng_mesg) \
+ (len), M_NETGRAPH_MSG, (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_ */
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