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38 * Author: Julian Elischer <julian@freebsd.org>
39 * $Whistle: ng_message.h,v 1.12 1999/01/25 01:17:44 archie Exp $
42 #ifndef _NETGRAPH_NG_MESSAGE_H_
43 #define _NETGRAPH_NG_MESSAGE_H_
45 /* ASCII string size limits */
46 #define NG_TYPESIZ 32 /* max type name len (including null) */
47 #define NG_HOOKSIZ 32 /* max hook name len (including null) */
48 #define NG_NODESIZ 32 /* max node name len (including null) */
49 #define NG_PATHSIZ 512 /* max path len (including null) */
50 #define NG_CMDSTRSIZ 32 /* max command string (including null) */
52 #define NG_TEXTRESPONSE 1024 /* allow this length for a text response */
54 /* A netgraph message */
57 u_char version; /* == NGM_VERSION */
58 u_char spare; /* pad to 4 bytes */
60 u_int32_t arglen; /* length of data */
61 u_int32_t cmd; /* command identifier */
62 u_int32_t flags; /* message status */
63 u_int32_t token; /* match with reply */
64 u_int32_t typecookie; /* node's type cookie */
65 u_char cmdstr[NG_CMDSTRSIZ]; /* cmd string + \0 */
67 char data[]; /* placeholder for actual data */
70 /* This command is guaranteed to not alter data (or'd into the command). */
71 #define NGM_READONLY 0x10000000
72 /* This command is guaranteed to have a reply (or'd into the command). */
73 #define NGM_HASREPLY 0x20000000
75 /* Keep this in sync with the above structure definition */
76 #define NG_GENERIC_NG_MESG_INFO(dtype) { \
77 { "version", &ng_parse_uint8_type }, \
78 { "spare", &ng_parse_uint8_type }, \
79 { "spare2", &ng_parse_uint16_type }, \
80 { "arglen", &ng_parse_uint32_type }, \
81 { "cmd", &ng_parse_uint32_type }, \
82 { "flags", &ng_parse_hint32_type }, \
83 { "token", &ng_parse_uint32_type }, \
84 { "typecookie", &ng_parse_uint32_type }, \
85 { "cmdstr", &ng_parse_cmdbuf_type }, \
86 { "data", (dtype) }, \
91 * Netgraph message header compatibility field
92 * Interfaces within the kernel are defined by a different
93 * value (see NG_ABI_VERSION in netgraph.h)
97 /* Flags field flags */
98 #define NGF_ORIG 0x00000000 /* the msg is the original request */
99 #define NGF_RESP 0x00000001 /* the message is a response */
101 /* Type of a unique node ID. */
102 #define ng_ID_t uint32_t
105 * Here we describe the "generic" messages that all nodes inherently
106 * understand. With the exception of NGM_TEXT_STATUS, these are handled
107 * automatically by the base netgraph code.
110 /* Generic message type cookie */
111 #define NGM_GENERIC_COOKIE 1137070366
113 /* Generic messages defined for this type cookie. */
115 NGM_SHUTDOWN = 1, /* Shut down node. */
116 NGM_MKPEER = 2, /* Create and attach a peer node. */
117 NGM_CONNECT = 3, /* Connect two nodes. */
118 NGM_NAME = 4, /* Give a node a name. */
119 NGM_RMHOOK = 5, /* Break a connection between two nodes. */
121 /* Get nodeinfo for target. */
122 NGM_NODEINFO = (6|NGM_READONLY|NGM_HASREPLY),
123 /* Get list of hooks on node. */
124 NGM_LISTHOOKS = (7|NGM_READONLY|NGM_HASREPLY),
125 /* List globally named nodes. */
126 NGM_LISTNAMES = (8|NGM_READONLY|NGM_HASREPLY),
127 /* List all nodes. */
128 NGM_LISTNODES = (9|NGM_READONLY|NGM_HASREPLY),
129 /* List installed node types. */
130 NGM_LISTTYPES = (10|NGM_READONLY|NGM_HASREPLY),
131 /* (optional) Get text status. */
132 NGM_TEXT_STATUS = (11|NGM_READONLY|NGM_HASREPLY),
133 /* Convert struct ng_mesg to ASCII. */
134 NGM_BINARY2ASCII= (12|NGM_READONLY|NGM_HASREPLY),
135 /* Convert ASCII to struct ng_mesg. */
136 NGM_ASCII2BINARY= (13|NGM_READONLY|NGM_HASREPLY),
137 /* (optional) Get/set text config. */
138 NGM_TEXT_CONFIG = 14,
142 * Flow control and intra node control messages.
143 * These are routed between nodes to allow flow control and to allow
144 * events to be passed around the graph.
145 * There will be some form of default handling for these but I
146 * do not yet know what it is..
149 /* Generic message type cookie */
150 #define NGM_FLOW_COOKIE 851672669 /* temp for debugging */
152 /* Upstream messages */
153 #define NGM_LINK_IS_UP 32 /* e.g. carrier found - no data */
154 #define NGM_LINK_IS_DOWN 33 /* carrier lost, includes queue state */
155 #define NGM_HIGH_WATER_PASSED 34 /* includes queue state */
156 #define NGM_LOW_WATER_PASSED 35 /* includes queue state */
157 #define NGM_SYNC_QUEUE_STATE 36 /* sync response from sending packet */
159 /* Downstream messages */
160 #define NGM_DROP_LINK 41 /* drop DTR, etc. - stay in the graph */
161 #define NGM_RAISE_LINK 42 /* if you previously dropped it */
162 #define NGM_FLUSH_QUEUE 43 /* no data */
163 #define NGM_GET_BANDWIDTH (44|NGM_READONLY) /* either real or measured */
164 #define NGM_SET_XMIT_Q_LIMITS 45 /* includes queue state */
165 #define NGM_GET_XMIT_Q_LIMITS (46|NGM_READONLY) /* returns queue state */
166 #define NGM_MICROMANAGE 47 /* We want sync. queue state
167 reply for each packet sent */
168 #define NGM_SET_FLOW_MANAGER 48 /* send flow control here */
169 /* Structure used for NGM_MKPEER */
171 char type[NG_TYPESIZ]; /* peer type */
172 char ourhook[NG_HOOKSIZ]; /* hook name */
173 char peerhook[NG_HOOKSIZ]; /* peer hook name */
176 /* Keep this in sync with the above structure definition */
177 #define NG_GENERIC_MKPEER_INFO() { \
178 { "type", &ng_parse_typebuf_type }, \
179 { "ourhook", &ng_parse_hookbuf_type }, \
180 { "peerhook", &ng_parse_hookbuf_type }, \
184 /* Structure used for NGM_CONNECT */
186 char path[NG_PATHSIZ]; /* peer path */
187 char ourhook[NG_HOOKSIZ]; /* hook name */
188 char peerhook[NG_HOOKSIZ]; /* peer hook name */
191 /* Keep this in sync with the above structure definition */
192 #define NG_GENERIC_CONNECT_INFO() { \
193 { "path", &ng_parse_pathbuf_type }, \
194 { "ourhook", &ng_parse_hookbuf_type }, \
195 { "peerhook", &ng_parse_hookbuf_type }, \
199 /* Structure used for NGM_NAME */
201 char name[NG_NODESIZ]; /* node name */
204 /* Keep this in sync with the above structure definition */
205 #define NG_GENERIC_NAME_INFO() { \
206 { "name", &ng_parse_nodebuf_type }, \
210 /* Structure used for NGM_RMHOOK */
212 char ourhook[NG_HOOKSIZ]; /* hook name */
215 /* Keep this in sync with the above structure definition */
216 #define NG_GENERIC_RMHOOK_INFO() { \
217 { "hook", &ng_parse_hookbuf_type }, \
221 /* Structure used for NGM_NODEINFO */
223 char name[NG_NODESIZ]; /* node name (if any) */
224 char type[NG_TYPESIZ]; /* peer type */
225 ng_ID_t id; /* unique identifier */
226 u_int32_t hooks; /* number of active hooks */
229 /* Keep this in sync with the above structure definition */
230 #define NG_GENERIC_NODEINFO_INFO() { \
231 { "name", &ng_parse_nodebuf_type }, \
232 { "type", &ng_parse_typebuf_type }, \
233 { "id", &ng_parse_hint32_type }, \
234 { "hooks", &ng_parse_uint32_type }, \
238 /* Structure used for NGM_LISTHOOKS */
240 char ourhook[NG_HOOKSIZ]; /* hook name */
241 char peerhook[NG_HOOKSIZ]; /* peer hook */
242 struct nodeinfo nodeinfo;
245 /* Keep this in sync with the above structure definition */
246 #define NG_GENERIC_LINKINFO_INFO(nitype) { \
247 { "ourhook", &ng_parse_hookbuf_type }, \
248 { "peerhook", &ng_parse_hookbuf_type }, \
249 { "nodeinfo", (nitype) }, \
254 struct nodeinfo nodeinfo; /* node information */
255 struct linkinfo link[]; /* info about each hook */
258 /* Keep this in sync with the above structure definition */
259 #define NG_GENERIC_HOOKLIST_INFO(nitype,litype) { \
260 { "nodeinfo", (nitype) }, \
261 { "linkinfo", (litype) }, \
265 /* Structure used for NGM_LISTNAMES/NGM_LISTNODES */
268 struct nodeinfo nodeinfo[];
271 /* Keep this in sync with the above structure definition */
272 #define NG_GENERIC_LISTNODES_INFO(niarraytype) { \
273 { "numnames", &ng_parse_uint32_type }, \
274 { "nodeinfo", (niarraytype) }, \
278 /* Structure used for NGM_LISTTYPES */
280 char type_name[NG_TYPESIZ]; /* name of type */
281 u_int32_t numnodes; /* number alive */
284 /* Keep this in sync with the above structure definition */
285 #define NG_GENERIC_TYPEINFO_INFO() { \
286 { "typename", &ng_parse_typebuf_type }, \
287 { "numnodes", &ng_parse_uint32_type }, \
293 struct typeinfo typeinfo[];
296 /* Keep this in sync with the above structure definition */
297 #define NG_GENERIC_TYPELIST_INFO(tiarraytype) { \
298 { "numtypes", &ng_parse_uint32_type }, \
299 { "typeinfo", (tiarraytype) }, \
303 struct ngm_bandwidth {
304 u_int64_t nominal_in;
306 u_int64_t nominal_out;
310 /* Keep this in sync with the above structure definition */
311 #define NG_GENERIC_BANDWIDTH_INFO() { \
312 { "nominal_in", &ng_parse_uint64_type }, \
313 { "seen_in", &ng_parse_uint64_type }, \
314 { "nominal_out", &ng_parse_uint64_type }, \
315 { "seen_out", &ng_parse_uint64_type }, \
320 * Information about a node's 'output' queue.
321 * This is NOT the netgraph input queueing mechanism,
322 * but rather any queue the node may implement internally
323 * This has to consider ALTQ if we are to work with it.
324 * As far as I can see, ALTQ counts PACKETS, not bytes.
325 * If ALTQ has several queues and one has passed a watermark
326 * we should have the priority of that queue be real (and not -1)
327 * XXX ALTQ stuff is just an idea.....
329 struct ngm_queue_state {
330 u_int queue_priority; /* maybe only low-pri is full. -1 = all*/
331 u_int max_queuelen_bytes;
332 u_int max_queuelen_packets;
334 u_int high_watermark;
338 /* Keep this in sync with the above structure definition */
339 #define NG_GENERIC_QUEUE_INFO() { \
340 { "max_queuelen_bytes", &ng_parse_uint_type }, \
341 { "max_queuelen_packets", &ng_parse_uint_type }, \
342 { "high_watermark", &ng_parse_uint_type }, \
343 { "low_watermark", &ng_parse_uint_type }, \
344 { "current", &ng_parse_uint_type }, \
348 /* Tell a node who to send async flow control info to. */
349 struct flow_manager {
350 ng_ID_t id; /* unique identifier */
353 /* Keep this in sync with the above structure definition */
354 #define NG_GENERIC_FLOW_MANAGER_INFO() { \
355 { "id", &ng_parse_hint32_type }, \
360 * For netgraph nodes that are somehow associated with file descriptors
361 * (e.g., a device that has a /dev entry and is also a netgraph node),
362 * we define a generic ioctl for requesting the corresponding nodeinfo
363 * structure and for assigning a name (if there isn't one already).
365 * For these to you need to also #include <sys/ioccom.h>.
368 #define NGIOCGINFO _IOR('N', 40, struct nodeinfo) /* get node info */
369 #define NGIOCSETNAME _IOW('N', 41, struct ngm_name) /* set node name */
373 * Allocate and initialize a netgraph message "msg" with "len"
374 * extra bytes of argument. Sets "msg" to NULL if fails.
375 * Does not initialize token.
377 #define NG_MKMESSAGE(msg, cookie, cmdid, len, how) \
379 (msg) = malloc(sizeof(struct ng_mesg) \
380 + (len), M_NETGRAPH_MSG, (how) | M_ZERO); \
383 (msg)->header.version = NG_VERSION; \
384 (msg)->header.typecookie = (cookie); \
385 (msg)->header.cmd = (cmdid); \
386 (msg)->header.arglen = (len); \
387 strncpy((msg)->header.cmdstr, #cmdid, \
388 sizeof((msg)->header.cmdstr) - 1); \
392 * Allocate and initialize a response "rsp" to a message "msg"
393 * with "len" extra bytes of argument. Sets "rsp" to NULL if fails.
395 #define NG_MKRESPONSE(rsp, msg, len, how) \
397 (rsp) = malloc(sizeof(struct ng_mesg) \
398 + (len), M_NETGRAPH_MSG, (how) | M_ZERO); \
401 (rsp)->header.version = NG_VERSION; \
402 (rsp)->header.arglen = (len); \
403 (rsp)->header.token = (msg)->header.token; \
404 (rsp)->header.typecookie = (msg)->header.typecookie; \
405 (rsp)->header.cmd = (msg)->header.cmd; \
406 bcopy((msg)->header.cmdstr, (rsp)->header.cmdstr, \
407 sizeof((rsp)->header.cmdstr)); \
408 (rsp)->header.flags |= NGF_RESP; \
412 * Make a copy of message. Sets "copy" to NULL if fails.
414 #define NG_COPYMESSAGE(copy, msg, how) \
416 (copy) = malloc(sizeof(struct ng_mesg) \
417 + (msg)->header.arglen, M_NETGRAPH_MSG, (how) | M_ZERO); \
418 if ((copy) == NULL) \
420 (copy)->header.version = NG_VERSION; \
421 (copy)->header.arglen = (msg)->header.arglen; \
422 (copy)->header.token = (msg)->header.token; \
423 (copy)->header.typecookie = (msg)->header.typecookie; \
424 (copy)->header.cmd = (msg)->header.cmd; \
425 (copy)->header.flags = (msg)->header.flags; \
426 bcopy((msg)->header.cmdstr, (copy)->header.cmdstr, \
427 sizeof((copy)->header.cmdstr)); \
428 if ((msg)->header.arglen > 0) \
429 bcopy((msg)->data, (copy)->data, (msg)->header.arglen); \
434 #endif /* _NETGRAPH_NG_MESSAGE_H_ */