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