1/* 2 * ng_message.h 3 */ 4 5/*- 6 * Copyright (c) 1996-1999 Whistle Communications, Inc. 7 * All rights reserved. 8 * 9 * Subject to the following obligations and disclaimer of warranty, use and 10 * redistribution of this software, in source or object code forms, with or 11 * without modifications are expressly permitted by Whistle Communications; 12 * provided, however, that: 13 * 1. Any and all reproductions of the source or object code must include the 14 * copyright notice above and the following disclaimer of warranties; and 15 * 2. No rights are granted, in any manner or form, to use Whistle 16 * Communications, Inc. trademarks, including the mark "WHISTLE 17 * COMMUNICATIONS" on advertising, endorsements, or otherwise except as 18 * such appears in the above copyright notice or in the software. 19 * 20 * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND 21 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO 22 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE, 23 * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF 24 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. 25 * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY 26 * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS 27 * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE. 28 * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES 29 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING 30 * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, 31 * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR 32 * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY 33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 35 * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY 36 * OF SUCH DAMAGE. 37 * 38 * Author: Julian Elischer <julian@freebsd.org> 39 * $Whistle: ng_message.h,v 1.12 1999/01/25 01:17:44 archie Exp $ 40 */ 41 42#ifndef _NETGRAPH_NG_MESSAGE_H_ 43#define _NETGRAPH_NG_MESSAGE_H_ 44 45/* 46 * ASCII string size limits 47 * Check with struct sockaddr_ng if changing. 48 */ 49#define NG_TYPESIZ 32 /* max type name len (including null) */ 50#define NG_HOOKSIZ 32 /* max hook name len (including null) */ 51#define NG_NODESIZ 32 /* max node name len (including null) */ 52#define NG_PATHSIZ 512 /* max path len (including null) */ 53#define NG_CMDSTRSIZ 32 /* max command string (including null) */ 54 55#define NG_TEXTRESPONSE 1024 /* allow this length for a text response */ 56 57/* A netgraph message */ 58struct ng_mesg { 59 struct ng_msghdr { 60 u_char version; /* == NGM_VERSION */ 61 u_char spare; /* pad to 4 bytes */ 62 u_int16_t spare2; 63 u_int32_t arglen; /* length of data */ 64 u_int32_t cmd; /* command identifier */ 65 u_int32_t flags; /* message status */ 66 u_int32_t token; /* match with reply */ 67 u_int32_t typecookie; /* node's type cookie */ 68 u_char cmdstr[NG_CMDSTRSIZ]; /* cmd string + \0 */ 69 } header; 70 char data[]; /* placeholder for actual data */ 71}; 72 73/* This command is guaranteed to not alter data (or'd into the command). */ 74#define NGM_READONLY 0x10000000 75/* This command is guaranteed to have a reply (or'd into the command). */ 76#define NGM_HASREPLY 0x20000000 77 78/* Keep this in sync with the above structure definition */ 79#define NG_GENERIC_NG_MESG_INFO(dtype) { \ 80 { "version", &ng_parse_uint8_type }, \ 81 { "spare", &ng_parse_uint8_type }, \ 82 { "spare2", &ng_parse_uint16_type }, \ 83 { "arglen", &ng_parse_uint32_type }, \ 84 { "cmd", &ng_parse_uint32_type }, \ 85 { "flags", &ng_parse_hint32_type }, \ 86 { "token", &ng_parse_uint32_type }, \ 87 { "typecookie", &ng_parse_uint32_type }, \ 88 { "cmdstr", &ng_parse_cmdbuf_type }, \ 89 { "data", (dtype) }, \ 90 { NULL } \ 91} 92 93/* 94 * Netgraph message header compatibility field 95 * Interfaces within the kernel are defined by a different 96 * value (see NG_ABI_VERSION in netgraph.h) 97 */ 98#define NG_VERSION 8 99 100/* Flags field flags */ 101#define NGF_ORIG 0x00000000 /* the msg is the original request */ 102#define NGF_RESP 0x00000001 /* the message is a response */ 103 104/* Type of a unique node ID. */ 105#define ng_ID_t uint32_t 106 107/* 108 * Here we describe the "generic" messages that all nodes inherently 109 * understand. With the exception of NGM_TEXT_STATUS, these are handled 110 * automatically by the base netgraph code. 111 */ 112 113/* Generic message type cookie */ 114#define NGM_GENERIC_COOKIE 1137070366 115 116/* Generic messages defined for this type cookie. */ 117enum { 118 NGM_SHUTDOWN = 1, /* Shut down node. */ 119 NGM_MKPEER = 2, /* Create and attach a peer node. */ 120 NGM_CONNECT = 3, /* Connect two nodes. */ 121 NGM_NAME = 4, /* Give a node a name. */ 122 NGM_RMHOOK = 5, /* Break a connection between two nodes. */ 123 124 /* Get nodeinfo for target. */ 125 NGM_NODEINFO = (6|NGM_READONLY|NGM_HASREPLY), 126 /* Get list of hooks on node. */ 127 NGM_LISTHOOKS = (7|NGM_READONLY|NGM_HASREPLY), 128 /* List globally named nodes. */ 129 NGM_LISTNAMES = (8|NGM_READONLY|NGM_HASREPLY), 130 /* List all nodes. */ 131 NGM_LISTNODES = (9|NGM_READONLY|NGM_HASREPLY), 132 /* List installed node types. */ 133 NGM_LISTTYPES = (10|NGM_READONLY|NGM_HASREPLY), 134 /* (optional) Get text status. */ 135 NGM_TEXT_STATUS = (11|NGM_READONLY|NGM_HASREPLY), 136 /* Convert struct ng_mesg to ASCII. */ 137 NGM_BINARY2ASCII= (12|NGM_READONLY|NGM_HASREPLY), 138 /* Convert ASCII to struct ng_mesg. */ 139 NGM_ASCII2BINARY= (13|NGM_READONLY|NGM_HASREPLY), 140 /* (optional) Get/set text config. */ 141 NGM_TEXT_CONFIG = 14, 142}; 143 144/* 145 * Flow control and intra node control messages. 146 * These are routed between nodes to allow flow control and to allow 147 * events to be passed around the graph. 148 * There will be some form of default handling for these but I 149 * do not yet know what it is.. 150 */ 151 152/* Generic message type cookie */ 153#define NGM_FLOW_COOKIE 851672669 /* temp for debugging */ 154 155/* Upstream messages */ 156#define NGM_LINK_IS_UP 32 /* e.g. carrier found - no data */ 157#define NGM_LINK_IS_DOWN 33 /* carrier lost, includes queue state */ 158#define NGM_HIGH_WATER_PASSED 34 /* includes queue state */ 159#define NGM_LOW_WATER_PASSED 35 /* includes queue state */ 160#define NGM_SYNC_QUEUE_STATE 36 /* sync response from sending packet */ 161 162/* Downstream messages */ 163#define NGM_DROP_LINK 41 /* drop DTR, etc. - stay in the graph */ 164#define NGM_RAISE_LINK 42 /* if you previously dropped it */ 165#define NGM_FLUSH_QUEUE 43 /* no data */ 166#define NGM_GET_BANDWIDTH (44|NGM_READONLY) /* either real or measured */ 167#define NGM_SET_XMIT_Q_LIMITS 45 /* includes queue state */ 168#define NGM_GET_XMIT_Q_LIMITS (46|NGM_READONLY) /* returns queue state */ 169#define NGM_MICROMANAGE 47 /* We want sync. queue state 170 reply for each packet sent */ 171#define NGM_SET_FLOW_MANAGER 48 /* send flow control here */ 172/* Structure used for NGM_MKPEER */ 173struct ngm_mkpeer { 174 char type[NG_TYPESIZ]; /* peer type */ 175 char ourhook[NG_HOOKSIZ]; /* hook name */ 176 char peerhook[NG_HOOKSIZ]; /* peer hook name */ 177}; 178 179/* Keep this in sync with the above structure definition */ 180#define NG_GENERIC_MKPEER_INFO() { \ 181 { "type", &ng_parse_typebuf_type }, \ 182 { "ourhook", &ng_parse_hookbuf_type }, \ 183 { "peerhook", &ng_parse_hookbuf_type }, \ 184 { NULL } \ 185} 186 187/* Structure used for NGM_CONNECT */ 188struct ngm_connect { 189 char path[NG_PATHSIZ]; /* peer path */ 190 char ourhook[NG_HOOKSIZ]; /* hook name */ 191 char peerhook[NG_HOOKSIZ]; /* peer hook name */ 192}; 193 194/* Keep this in sync with the above structure definition */ 195#define NG_GENERIC_CONNECT_INFO() { \ 196 { "path", &ng_parse_pathbuf_type }, \ 197 { "ourhook", &ng_parse_hookbuf_type }, \ 198 { "peerhook", &ng_parse_hookbuf_type }, \ 199 { NULL } \ 200} 201 202/* Structure used for NGM_NAME */ 203struct ngm_name { 204 char name[NG_NODESIZ]; /* node name */ 205}; 206 207/* Keep this in sync with the above structure definition */ 208#define NG_GENERIC_NAME_INFO() { \ 209 { "name", &ng_parse_nodebuf_type }, \ 210 { NULL } \ 211} 212 213/* Structure used for NGM_RMHOOK */ 214struct ngm_rmhook { 215 char ourhook[NG_HOOKSIZ]; /* hook name */ 216}; 217 218/* Keep this in sync with the above structure definition */ 219#define NG_GENERIC_RMHOOK_INFO() { \ 220 { "hook", &ng_parse_hookbuf_type }, \ 221 { NULL } \ 222} 223 224/* Structure used for NGM_NODEINFO */ 225struct nodeinfo { 226 char name[NG_NODESIZ]; /* node name (if any) */ 227 char type[NG_TYPESIZ]; /* peer type */ 228 ng_ID_t id; /* unique identifier */ 229 u_int32_t hooks; /* number of active hooks */ 230}; 231 232/* Keep this in sync with the above structure definition */ 233#define NG_GENERIC_NODEINFO_INFO() { \ 234 { "name", &ng_parse_nodebuf_type }, \ 235 { "type", &ng_parse_typebuf_type }, \ 236 { "id", &ng_parse_hint32_type }, \ 237 { "hooks", &ng_parse_uint32_type }, \ 238 { NULL } \ 239} 240 241/* Structure used for NGM_LISTHOOKS */ 242struct linkinfo { 243 char ourhook[NG_HOOKSIZ]; /* hook name */ 244 char peerhook[NG_HOOKSIZ]; /* peer hook */ 245 struct nodeinfo nodeinfo; 246}; 247 248/* Keep this in sync with the above structure definition */ 249#define NG_GENERIC_LINKINFO_INFO(nitype) { \ 250 { "ourhook", &ng_parse_hookbuf_type }, \ 251 { "peerhook", &ng_parse_hookbuf_type }, \ 252 { "nodeinfo", (nitype) }, \ 253 { NULL } \ 254} 255 256struct hooklist { 257 struct nodeinfo nodeinfo; /* node information */ 258 struct linkinfo link[]; /* info about each hook */ 259}; 260 261/* Keep this in sync with the above structure definition */ 262#define NG_GENERIC_HOOKLIST_INFO(nitype,litype) { \ 263 { "nodeinfo", (nitype) }, \ 264 { "linkinfo", (litype) }, \ 265 { NULL } \ 266} 267 268/* Structure used for NGM_LISTNAMES/NGM_LISTNODES */ 269struct namelist { 270 u_int32_t numnames; 271 struct nodeinfo nodeinfo[]; 272}; 273 274/* Keep this in sync with the above structure definition */ 275#define NG_GENERIC_LISTNODES_INFO(niarraytype) { \ 276 { "numnames", &ng_parse_uint32_type }, \ 277 { "nodeinfo", (niarraytype) }, \ 278 { NULL } \ 279} 280 281/* Structure used for NGM_LISTTYPES */ 282struct typeinfo { 283 char type_name[NG_TYPESIZ]; /* name of type */ 284 u_int32_t numnodes; /* number alive */ 285}; 286 287/* Keep this in sync with the above structure definition */ 288#define NG_GENERIC_TYPEINFO_INFO() { \ 289 { "typename", &ng_parse_typebuf_type }, \ 290 { "numnodes", &ng_parse_uint32_type }, \ 291 { NULL } \ 292} 293 294struct typelist { 295 u_int32_t numtypes; 296 struct typeinfo typeinfo[]; 297}; 298 299/* Keep this in sync with the above structure definition */ 300#define NG_GENERIC_TYPELIST_INFO(tiarraytype) { \ 301 { "numtypes", &ng_parse_uint32_type }, \ 302 { "typeinfo", (tiarraytype) }, \ 303 { NULL } \ 304} 305 306struct ngm_bandwidth { 307 u_int64_t nominal_in; 308 u_int64_t seen_in; 309 u_int64_t nominal_out; 310 u_int64_t seen_out; 311}; 312 313/* Keep this in sync with the above structure definition */ 314#define NG_GENERIC_BANDWIDTH_INFO() { \ 315 { "nominal_in", &ng_parse_uint64_type }, \ 316 { "seen_in", &ng_parse_uint64_type }, \ 317 { "nominal_out", &ng_parse_uint64_type }, \ 318 { "seen_out", &ng_parse_uint64_type }, \ 319 { NULL } \ 320} 321 322/* 323 * Information about a node's 'output' queue. 324 * This is NOT the netgraph input queueing mechanism, 325 * but rather any queue the node may implement internally 326 * This has to consider ALTQ if we are to work with it. 327 * As far as I can see, ALTQ counts PACKETS, not bytes. 328 * If ALTQ has several queues and one has passed a watermark 329 * we should have the priority of that queue be real (and not -1) 330 * XXX ALTQ stuff is just an idea..... 331 */ 332struct ngm_queue_state { 333 u_int queue_priority; /* maybe only low-pri is full. -1 = all*/ 334 u_int max_queuelen_bytes; 335 u_int max_queuelen_packets; 336 u_int low_watermark; 337 u_int high_watermark; 338 u_int current; 339}; 340 341/* Keep this in sync with the above structure definition */ 342#define NG_GENERIC_QUEUE_INFO() { \ 343 { "max_queuelen_bytes", &ng_parse_uint_type }, \ 344 { "max_queuelen_packets", &ng_parse_uint_type }, \ 345 { "high_watermark", &ng_parse_uint_type }, \ 346 { "low_watermark", &ng_parse_uint_type }, \ 347 { "current", &ng_parse_uint_type }, \ 348 { NULL } \ 349} 350 351/* Tell a node who to send async flow control info to. */ 352struct flow_manager { 353 ng_ID_t id; /* unique identifier */ 354}; 355 356/* Keep this in sync with the above structure definition */ 357#define NG_GENERIC_FLOW_MANAGER_INFO() { \ 358 { "id", &ng_parse_hint32_type }, \ 359 { NULL } \ 360} 361 362/* 363 * For netgraph nodes that are somehow associated with file descriptors 364 * (e.g., a device that has a /dev entry and is also a netgraph node), 365 * we define a generic ioctl for requesting the corresponding nodeinfo 366 * structure and for assigning a name (if there isn't one already). 367 * 368 * For these to you need to also #include <sys/ioccom.h>. 369 */ 370 371#define NGIOCGINFO _IOR('N', 40, struct nodeinfo) /* get node info */ 372#define NGIOCSETNAME _IOW('N', 41, struct ngm_name) /* set node name */ 373 374#ifdef _KERNEL 375/* 376 * Allocate and initialize a netgraph message "msg" with "len" 377 * extra bytes of argument. Sets "msg" to NULL if fails. 378 * Does not initialize token. 379 */ 380#define NG_MKMESSAGE(msg, cookie, cmdid, len, how) \ 381 do { \ 382 (msg) = malloc(sizeof(struct ng_mesg) \ 383 + (len), M_NETGRAPH_MSG, (how) | M_ZERO); \ 384 if ((msg) == NULL) \ 385 break; \ 386 (msg)->header.version = NG_VERSION; \ 387 (msg)->header.typecookie = (cookie); \ 388 (msg)->header.cmd = (cmdid); \ 389 (msg)->header.arglen = (len); \ 390 strncpy((msg)->header.cmdstr, #cmdid, \ 391 sizeof((msg)->header.cmdstr) - 1); \ 392 } while (0) 393 394/* 395 * Allocate and initialize a response "rsp" to a message "msg" 396 * with "len" extra bytes of argument. Sets "rsp" to NULL if fails. 397 */ 398#define NG_MKRESPONSE(rsp, msg, len, how) \ 399 do { \ 400 (rsp) = malloc(sizeof(struct ng_mesg) \ 401 + (len), M_NETGRAPH_MSG, (how) | M_ZERO); \ 402 if ((rsp) == NULL) \ 403 break; \ 404 (rsp)->header.version = NG_VERSION; \ 405 (rsp)->header.arglen = (len); \ 406 (rsp)->header.token = (msg)->header.token; \ 407 (rsp)->header.typecookie = (msg)->header.typecookie; \ 408 (rsp)->header.cmd = (msg)->header.cmd; \ 409 bcopy((msg)->header.cmdstr, (rsp)->header.cmdstr, \ 410 sizeof((rsp)->header.cmdstr)); \ 411 (rsp)->header.flags |= NGF_RESP; \ 412 } while (0) 413 414/* 415 * Make a copy of message. Sets "copy" to NULL if fails. 416 */ 417#define NG_COPYMESSAGE(copy, msg, how) \ 418 do { \ 419 (copy) = malloc(sizeof(struct ng_mesg) \ 420 + (msg)->header.arglen, M_NETGRAPH_MSG, (how) | M_ZERO); \ 421 if ((copy) == NULL) \ 422 break; \ 423 (copy)->header.version = NG_VERSION; \ 424 (copy)->header.arglen = (msg)->header.arglen; \ 425 (copy)->header.token = (msg)->header.token; \ 426 (copy)->header.typecookie = (msg)->header.typecookie; \ 427 (copy)->header.cmd = (msg)->header.cmd; \ 428 (copy)->header.flags = (msg)->header.flags; \ 429 bcopy((msg)->header.cmdstr, (copy)->header.cmdstr, \ 430 sizeof((copy)->header.cmdstr)); \ 431 if ((msg)->header.arglen > 0) \ 432 bcopy((msg)->data, (copy)->data, (msg)->header.arglen); \ 433 } while (0) 434 435#endif /* _KERNEL */ 436 437#endif /* _NETGRAPH_NG_MESSAGE_H_ */ 438