ng_source.c revision 220768
1106266Sjulian/* 2106266Sjulian * ng_source.c 3139823Simp */ 4139823Simp 5139823Simp/*- 6144674Sglebius * Copyright (c) 2005 Gleb Smirnoff <glebius@FreeBSD.org> 7106266Sjulian * Copyright 2002 Sandvine Inc. 8106266Sjulian * All rights reserved. 9106266Sjulian * 10106266Sjulian * Subject to the following obligations and disclaimer of warranty, use and 11106266Sjulian * redistribution of this software, in source or object code forms, with or 12106319Sjulian * without modifications are expressly permitted by Sandvine Inc.; provided, 13106266Sjulian * however, that: 14106319Sjulian * 1. Any and all reproductions of the source or object code must include the 15106319Sjulian * copyright notice above and the following disclaimer of warranties; and 16106266Sjulian * 2. No rights are granted, in any manner or form, to use Sandvine Inc. 17106319Sjulian * trademarks, including the mark "SANDVINE" on advertising, endorsements, 18106319Sjulian * or otherwise except as such appears in the above copyright notice or in 19106266Sjulian * the software. 20106266Sjulian * 21106266Sjulian * THIS SOFTWARE IS BEING PROVIDED BY SANDVINE "AS IS", AND TO THE MAXIMUM 22106319Sjulian * EXTENT PERMITTED BY LAW, SANDVINE MAKES NO REPRESENTATIONS OR WARRANTIES, 23106319Sjulian * EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE, INCLUDING WITHOUT LIMITATION, 24106319Sjulian * ANY AND ALL IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR 25106266Sjulian * PURPOSE, OR NON-INFRINGEMENT. SANDVINE DOES NOT WARRANT, GUARANTEE, OR 26106266Sjulian * MAKE ANY REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE 27106266Sjulian * USE OF THIS SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY 28106266Sjulian * OR OTHERWISE. IN NO EVENT SHALL SANDVINE BE LIABLE FOR ANY DAMAGES 29106266Sjulian * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING 30106319Sjulian * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, 31106266Sjulian * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR 32106266Sjulian * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY 33106266Sjulian * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 34106266Sjulian * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 35106266Sjulian * THIS SOFTWARE, EVEN IF SANDVINE IS ADVISED OF THE POSSIBILITY OF SUCH 36106266Sjulian * DAMAGE. 37106266Sjulian * 38209728Semaste * Author: Dave Chapeskie 39106266Sjulian */ 40106266Sjulian 41125077Sharti#include <sys/cdefs.h> 42125077Sharti__FBSDID("$FreeBSD: head/sys/netgraph/ng_source.c 220768 2011-04-18 09:12:27Z glebius $"); 43125077Sharti 44106266Sjulian/* 45106266Sjulian * This node is used for high speed packet geneneration. It queues 46143387Sbmilekic * all data recieved on its 'input' hook and when told to start via 47143387Sbmilekic * a control message it sends the packets out its 'output' hook. In 48143387Sbmilekic * this way this node can be preloaded with a packet stream which it 49143387Sbmilekic * can then send continuously as fast as possible. 50106266Sjulian * 51106266Sjulian * Currently it just copies the mbufs as required. It could do various 52106266Sjulian * tricks to try and avoid this. Probably the best performance would 53106266Sjulian * be achieved by modifying the appropriate drivers to be told to 54106266Sjulian * self-re-enqueue packets (e.g. the if_bge driver could reuse the same 55106266Sjulian * transmit descriptors) under control of this node; perhaps via some 56143387Sbmilekic * flag in the mbuf or some such. The node could peek at an appropriate 57106266Sjulian * ifnet flag to see if such support is available for the connected 58106266Sjulian * interface. 59106266Sjulian */ 60106266Sjulian 61106266Sjulian#include <sys/param.h> 62106266Sjulian#include <sys/systm.h> 63106266Sjulian#include <sys/errno.h> 64106266Sjulian#include <sys/kernel.h> 65106266Sjulian#include <sys/malloc.h> 66106266Sjulian#include <sys/mbuf.h> 67106266Sjulian#include <sys/socket.h> 68144674Sglebius#include <sys/syslog.h> 69106266Sjulian#include <net/if.h> 70106266Sjulian#include <net/if_var.h> 71196019Srwatson#include <net/vnet.h> 72106266Sjulian#include <netgraph/ng_message.h> 73106266Sjulian#include <netgraph/netgraph.h> 74106266Sjulian#include <netgraph/ng_parse.h> 75106266Sjulian#include <netgraph/ng_ether.h> 76106266Sjulian#include <netgraph/ng_source.h> 77106266Sjulian 78106266Sjulian#define NG_SOURCE_INTR_TICKS 1 79106266Sjulian#define NG_SOURCE_DRIVER_IFQ_MAXLEN (4*1024) 80106266Sjulian 81167156Semaste#define mtod_off(m,off,t) ((t)(mtod((m),caddr_t)+(off))) 82167156Semaste 83106266Sjulian/* Per node info */ 84106266Sjulianstruct privdata { 85106266Sjulian node_p node; 86144674Sglebius hook_p input; 87144674Sglebius hook_p output; 88106266Sjulian struct ng_source_stats stats; 89106319Sjulian struct ifqueue snd_queue; /* packets to send */ 90167160Semaste struct mbuf *last_packet; /* last pkt in queue */ 91106266Sjulian struct ifnet *output_ifp; 92137138Sglebius struct callout intr_ch; 93144674Sglebius uint64_t packets; /* packets to send */ 94144674Sglebius uint32_t queueOctets; 95167156Semaste struct ng_source_embed_info embed_timestamp; 96167160Semaste struct ng_source_embed_cnt_info embed_counter[NG_SOURCE_COUNTERS]; 97106266Sjulian}; 98106266Sjuliantypedef struct privdata *sc_p; 99106266Sjulian 100106266Sjulian/* Node flags */ 101106266Sjulian#define NG_SOURCE_ACTIVE (NGF_TYPE1) 102106266Sjulian 103106266Sjulian/* Netgraph methods */ 104106266Sjulianstatic ng_constructor_t ng_source_constructor; 105106266Sjulianstatic ng_rcvmsg_t ng_source_rcvmsg; 106106266Sjulianstatic ng_shutdown_t ng_source_rmnode; 107106266Sjulianstatic ng_newhook_t ng_source_newhook; 108144674Sglebiusstatic ng_connect_t ng_source_connect; 109106266Sjulianstatic ng_rcvdata_t ng_source_rcvdata; 110106266Sjulianstatic ng_disconnect_t ng_source_disconnect; 111106266Sjulian 112106266Sjulian/* Other functions */ 113125243Shartistatic void ng_source_intr(node_p, hook_p, void *, int); 114106266Sjulianstatic void ng_source_clr_data (sc_p); 115144674Sglebiusstatic int ng_source_start (sc_p, uint64_t); 116106266Sjulianstatic void ng_source_stop (sc_p); 117106266Sjulianstatic int ng_source_send (sc_p, int, int *); 118144674Sglebiusstatic int ng_source_store_output_ifp(sc_p, char *); 119167156Semastestatic void ng_source_packet_mod(sc_p, struct mbuf *, 120167156Semaste int, int, caddr_t, int); 121167160Semastestatic void ng_source_mod_counter(sc_p sc, 122167160Semaste struct ng_source_embed_cnt_info *cnt, 123167160Semaste struct mbuf *m, int increment); 124167156Semastestatic int ng_source_dup_mod(sc_p, struct mbuf *, 125167156Semaste struct mbuf **); 126106266Sjulian 127106266Sjulian/* Parse type for timeval */ 128125077Shartistatic const struct ng_parse_struct_field ng_source_timeval_type_fields[] = { 129106266Sjulian { "tv_sec", &ng_parse_int32_type }, 130106266Sjulian { "tv_usec", &ng_parse_int32_type }, 131106266Sjulian { NULL } 132106266Sjulian}; 133106266Sjulianconst struct ng_parse_type ng_source_timeval_type = { 134106266Sjulian &ng_parse_struct_type, 135106266Sjulian &ng_source_timeval_type_fields 136106266Sjulian}; 137106266Sjulian 138106266Sjulian/* Parse type for struct ng_source_stats */ 139106266Sjulianstatic const struct ng_parse_struct_field ng_source_stats_type_fields[] 140106266Sjulian = NG_SOURCE_STATS_TYPE_INFO; 141106266Sjulianstatic const struct ng_parse_type ng_source_stats_type = { 142106266Sjulian &ng_parse_struct_type, 143106266Sjulian &ng_source_stats_type_fields 144106266Sjulian}; 145106266Sjulian 146167156Semaste/* Parse type for struct ng_source_embed_info */ 147167156Semastestatic const struct ng_parse_struct_field ng_source_embed_type_fields[] = 148167156Semaste NG_SOURCE_EMBED_TYPE_INFO; 149167156Semastestatic const struct ng_parse_type ng_source_embed_type = { 150167156Semaste &ng_parse_struct_type, 151167156Semaste &ng_source_embed_type_fields 152167156Semaste}; 153167156Semaste 154167160Semaste/* Parse type for struct ng_source_embed_cnt_info */ 155167160Semastestatic const struct ng_parse_struct_field ng_source_embed_cnt_type_fields[] = 156167160Semaste NG_SOURCE_EMBED_CNT_TYPE_INFO; 157167160Semastestatic const struct ng_parse_type ng_source_embed_cnt_type = { 158167160Semaste &ng_parse_struct_type, 159167160Semaste &ng_source_embed_cnt_type_fields 160167160Semaste}; 161167160Semaste 162106266Sjulian/* List of commands and how to convert arguments to/from ASCII */ 163106266Sjulianstatic const struct ng_cmdlist ng_source_cmds[] = { 164106266Sjulian { 165106266Sjulian NGM_SOURCE_COOKIE, 166106266Sjulian NGM_SOURCE_GET_STATS, 167106266Sjulian "getstats", 168106266Sjulian NULL, 169106266Sjulian &ng_source_stats_type 170106266Sjulian }, 171106266Sjulian { 172106266Sjulian NGM_SOURCE_COOKIE, 173106266Sjulian NGM_SOURCE_CLR_STATS, 174106266Sjulian "clrstats", 175106266Sjulian NULL, 176106266Sjulian NULL 177106266Sjulian }, 178106266Sjulian { 179106266Sjulian NGM_SOURCE_COOKIE, 180106266Sjulian NGM_SOURCE_GETCLR_STATS, 181106266Sjulian "getclrstats", 182106266Sjulian NULL, 183106266Sjulian &ng_source_stats_type 184106266Sjulian }, 185106266Sjulian { 186106266Sjulian NGM_SOURCE_COOKIE, 187106266Sjulian NGM_SOURCE_START, 188106266Sjulian "start", 189106266Sjulian &ng_parse_uint64_type, 190106266Sjulian NULL 191106266Sjulian }, 192106266Sjulian { 193106266Sjulian NGM_SOURCE_COOKIE, 194106266Sjulian NGM_SOURCE_STOP, 195106266Sjulian "stop", 196106266Sjulian NULL, 197106266Sjulian NULL 198106266Sjulian }, 199106266Sjulian { 200106266Sjulian NGM_SOURCE_COOKIE, 201106266Sjulian NGM_SOURCE_CLR_DATA, 202106266Sjulian "clrdata", 203106266Sjulian NULL, 204106266Sjulian NULL 205106266Sjulian }, 206125033Sharti { 207125033Sharti NGM_SOURCE_COOKIE, 208144674Sglebius NGM_SOURCE_SETIFACE, 209144674Sglebius "setiface", 210144674Sglebius &ng_parse_string_type, 211125033Sharti NULL 212125033Sharti }, 213153690Sglebius { 214153690Sglebius NGM_SOURCE_COOKIE, 215153690Sglebius NGM_SOURCE_SETPPS, 216153690Sglebius "setpps", 217153690Sglebius &ng_parse_uint32_type, 218153690Sglebius NULL 219153690Sglebius }, 220167156Semaste { 221167156Semaste NGM_SOURCE_COOKIE, 222167156Semaste NGM_SOURCE_SET_TIMESTAMP, 223167156Semaste "settimestamp", 224167156Semaste &ng_source_embed_type, 225167156Semaste NULL 226167156Semaste }, 227167156Semaste { 228167156Semaste NGM_SOURCE_COOKIE, 229167156Semaste NGM_SOURCE_GET_TIMESTAMP, 230167156Semaste "gettimestamp", 231167156Semaste NULL, 232167156Semaste &ng_source_embed_type 233167156Semaste }, 234167160Semaste { 235167160Semaste NGM_SOURCE_COOKIE, 236167160Semaste NGM_SOURCE_SET_COUNTER, 237167160Semaste "setcounter", 238167160Semaste &ng_source_embed_cnt_type, 239167160Semaste NULL 240167160Semaste }, 241167160Semaste { 242167160Semaste NGM_SOURCE_COOKIE, 243167160Semaste NGM_SOURCE_GET_COUNTER, 244167160Semaste "getcounter", 245167160Semaste &ng_parse_uint8_type, 246167160Semaste &ng_source_embed_cnt_type 247167160Semaste }, 248106266Sjulian { 0 } 249106266Sjulian}; 250106266Sjulian 251106266Sjulian/* Netgraph type descriptor */ 252106266Sjulianstatic struct ng_type ng_source_typestruct = { 253129823Sjulian .version = NG_ABI_VERSION, 254129823Sjulian .name = NG_SOURCE_NODE_TYPE, 255129823Sjulian .constructor = ng_source_constructor, 256129823Sjulian .rcvmsg = ng_source_rcvmsg, 257129823Sjulian .shutdown = ng_source_rmnode, 258129823Sjulian .newhook = ng_source_newhook, 259144674Sglebius .connect = ng_source_connect, 260129823Sjulian .rcvdata = ng_source_rcvdata, 261129823Sjulian .disconnect = ng_source_disconnect, 262129823Sjulian .cmdlist = ng_source_cmds, 263106266Sjulian}; 264106266SjulianNETGRAPH_INIT(source, &ng_source_typestruct); 265106266Sjulian 266144674Sglebiusstatic int ng_source_set_autosrc(sc_p, uint32_t); 267125032Sharti 268106266Sjulian/* 269106266Sjulian * Node constructor 270106266Sjulian */ 271106266Sjulianstatic int 272106321Sjulianng_source_constructor(node_p node) 273106266Sjulian{ 274106266Sjulian sc_p sc; 275106266Sjulian 276220768Sglebius sc = malloc(sizeof(*sc), M_NETGRAPH, M_WAITOK | M_ZERO); 277106266Sjulian 278106321Sjulian NG_NODE_SET_PRIVATE(node, sc); 279106321Sjulian sc->node = node; 280106266Sjulian sc->snd_queue.ifq_maxlen = 2048; /* XXX not checked */ 281137138Sglebius ng_callout_init(&sc->intr_ch); 282137138Sglebius 283106266Sjulian return (0); 284106266Sjulian} 285106266Sjulian 286106266Sjulian/* 287106266Sjulian * Add a hook 288106266Sjulian */ 289106266Sjulianstatic int 290106266Sjulianng_source_newhook(node_p node, hook_p hook, const char *name) 291106266Sjulian{ 292144674Sglebius sc_p sc = NG_NODE_PRIVATE(node); 293106266Sjulian 294106266Sjulian if (strcmp(name, NG_SOURCE_HOOK_INPUT) == 0) { 295144674Sglebius sc->input = hook; 296106266Sjulian } else if (strcmp(name, NG_SOURCE_HOOK_OUTPUT) == 0) { 297144674Sglebius sc->output = hook; 298106266Sjulian sc->output_ifp = 0; 299106266Sjulian bzero(&sc->stats, sizeof(sc->stats)); 300106266Sjulian } else 301106266Sjulian return (EINVAL); 302144674Sglebius 303106266Sjulian return (0); 304106266Sjulian} 305106266Sjulian 306106266Sjulian/* 307144674Sglebius * Hook has been added 308144674Sglebius */ 309144674Sglebiusstatic int 310144674Sglebiusng_source_connect(hook_p hook) 311144674Sglebius{ 312144674Sglebius sc_p sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); 313144674Sglebius struct ng_mesg *msg; 314144674Sglebius int dummy_error = 0; 315144674Sglebius 316144674Sglebius /* 317144674Sglebius * If this is "output" hook, then request information 318144674Sglebius * from our downstream. 319144674Sglebius */ 320144674Sglebius if (hook == sc->output) { 321144674Sglebius NG_MKMESSAGE(msg, NGM_ETHER_COOKIE, NGM_ETHER_GET_IFNAME, 322144674Sglebius 0, M_NOWAIT); 323144674Sglebius if (msg == NULL) 324144674Sglebius return (ENOBUFS); 325144674Sglebius 326144674Sglebius /* 327144674Sglebius * Our hook and peer hook have HK_INVALID flag set, 328144674Sglebius * so we can't use NG_SEND_MSG_HOOK() macro here. 329144674Sglebius */ 330144674Sglebius NG_SEND_MSG_ID(dummy_error, sc->node, msg, 331144674Sglebius NG_NODE_ID(NG_PEER_NODE(sc->output)), NG_NODE_ID(sc->node)); 332144674Sglebius } 333144674Sglebius 334144674Sglebius return (0); 335144674Sglebius} 336144674Sglebius 337144674Sglebius/* 338106266Sjulian * Receive a control message 339106266Sjulian */ 340106266Sjulianstatic int 341106321Sjulianng_source_rcvmsg(node_p node, item_p item, hook_p lasthook) 342106266Sjulian{ 343144674Sglebius sc_p sc = NG_NODE_PRIVATE(node); 344144674Sglebius struct ng_mesg *msg, *resp = NULL; 345106266Sjulian int error = 0; 346106266Sjulian 347106321Sjulian NGI_GET_MSG(item, msg); 348144674Sglebius 349106266Sjulian switch (msg->header.typecookie) { 350106266Sjulian case NGM_SOURCE_COOKIE: 351106435Sjulian if (msg->header.flags & NGF_RESP) { 352106435Sjulian error = EINVAL; 353106435Sjulian break; 354106435Sjulian } 355106266Sjulian switch (msg->header.cmd) { 356106266Sjulian case NGM_SOURCE_GET_STATS: 357106266Sjulian case NGM_SOURCE_CLR_STATS: 358106266Sjulian case NGM_SOURCE_GETCLR_STATS: 359106266Sjulian { 360106266Sjulian struct ng_source_stats *stats; 361106266Sjulian 362106266Sjulian if (msg->header.cmd != NGM_SOURCE_CLR_STATS) { 363106266Sjulian NG_MKRESPONSE(resp, msg, 364106266Sjulian sizeof(*stats), M_NOWAIT); 365106266Sjulian if (resp == NULL) { 366106266Sjulian error = ENOMEM; 367106266Sjulian goto done; 368106266Sjulian } 369106266Sjulian sc->stats.queueOctets = sc->queueOctets; 370106319Sjulian sc->stats.queueFrames = sc->snd_queue.ifq_len; 371106321Sjulian if ((sc->node->nd_flags & NG_SOURCE_ACTIVE) 372106266Sjulian && !timevalisset(&sc->stats.endTime)) { 373106319Sjulian getmicrotime(&sc->stats.elapsedTime); 374106266Sjulian timevalsub(&sc->stats.elapsedTime, 375106319Sjulian &sc->stats.startTime); 376106266Sjulian } 377106319Sjulian stats = (struct ng_source_stats *)resp->data; 378106266Sjulian bcopy(&sc->stats, stats, sizeof(* stats)); 379106266Sjulian } 380106266Sjulian if (msg->header.cmd != NGM_SOURCE_GET_STATS) 381106266Sjulian bzero(&sc->stats, sizeof(sc->stats)); 382106266Sjulian } 383106266Sjulian break; 384106266Sjulian case NGM_SOURCE_START: 385106266Sjulian { 386144674Sglebius uint64_t packets; 387144674Sglebius 388144674Sglebius if (msg->header.arglen != sizeof(uint64_t)) { 389106266Sjulian error = EINVAL; 390106266Sjulian break; 391106266Sjulian } 392125033Sharti 393144674Sglebius packets = *(uint64_t *)msg->data; 394144674Sglebius 395144674Sglebius error = ng_source_start(sc, packets); 396144674Sglebius 397144674Sglebius break; 398125033Sharti } 399106266Sjulian case NGM_SOURCE_STOP: 400106266Sjulian ng_source_stop(sc); 401106266Sjulian break; 402106266Sjulian case NGM_SOURCE_CLR_DATA: 403106266Sjulian ng_source_clr_data(sc); 404106266Sjulian break; 405144674Sglebius case NGM_SOURCE_SETIFACE: 406144674Sglebius { 407144674Sglebius char *ifname = (char *)msg->data; 408144674Sglebius 409144674Sglebius if (msg->header.arglen < 2) { 410144674Sglebius error = EINVAL; 411144674Sglebius break; 412144674Sglebius } 413144674Sglebius 414144674Sglebius ng_source_store_output_ifp(sc, ifname); 415144674Sglebius break; 416144674Sglebius } 417153690Sglebius case NGM_SOURCE_SETPPS: 418153690Sglebius { 419153690Sglebius uint32_t pps; 420153690Sglebius 421153690Sglebius if (msg->header.arglen != sizeof(uint32_t)) { 422153690Sglebius error = EINVAL; 423153690Sglebius break; 424153690Sglebius } 425153690Sglebius 426153690Sglebius pps = *(uint32_t *)msg->data; 427153690Sglebius 428153690Sglebius sc->stats.maxPps = pps; 429153690Sglebius 430153690Sglebius break; 431153690Sglebius } 432167156Semaste case NGM_SOURCE_SET_TIMESTAMP: 433167156Semaste { 434167156Semaste struct ng_source_embed_info *embed; 435167156Semaste 436167168Semaste if (msg->header.arglen != sizeof(*embed)) { 437167168Semaste error = EINVAL; 438167168Semaste goto done; 439167168Semaste } 440167156Semaste embed = (struct ng_source_embed_info *)msg->data; 441167156Semaste bcopy(embed, &sc->embed_timestamp, sizeof(*embed)); 442167156Semaste 443167156Semaste break; 444167156Semaste } 445167156Semaste case NGM_SOURCE_GET_TIMESTAMP: 446167156Semaste { 447167156Semaste struct ng_source_embed_info *embed; 448167156Semaste 449167156Semaste NG_MKRESPONSE(resp, msg, sizeof(*embed), M_DONTWAIT); 450167156Semaste if (resp == NULL) { 451167156Semaste error = ENOMEM; 452167156Semaste goto done; 453167156Semaste } 454167156Semaste embed = (struct ng_source_embed_info *)resp->data; 455167156Semaste bcopy(&sc->embed_timestamp, embed, sizeof(*embed)); 456167156Semaste 457167156Semaste break; 458167156Semaste } 459167160Semaste case NGM_SOURCE_SET_COUNTER: 460167160Semaste { 461167160Semaste struct ng_source_embed_cnt_info *embed; 462167160Semaste 463167168Semaste if (msg->header.arglen != sizeof(*embed)) { 464167168Semaste error = EINVAL; 465167168Semaste goto done; 466167168Semaste } 467167160Semaste embed = (struct ng_source_embed_cnt_info *)msg->data; 468167160Semaste if (embed->index >= NG_SOURCE_COUNTERS || 469167160Semaste !(embed->width == 1 || embed->width == 2 || 470167160Semaste embed->width == 4)) { 471167160Semaste error = EINVAL; 472167160Semaste goto done; 473167160Semaste } 474167160Semaste bcopy(embed, &sc->embed_counter[embed->index], 475167160Semaste sizeof(*embed)); 476167160Semaste 477167160Semaste break; 478167160Semaste } 479167160Semaste case NGM_SOURCE_GET_COUNTER: 480167160Semaste { 481167160Semaste uint8_t index = *(uint8_t *)msg->data; 482167160Semaste struct ng_source_embed_cnt_info *embed; 483167160Semaste 484167160Semaste if (index >= NG_SOURCE_COUNTERS) { 485167160Semaste error = EINVAL; 486167160Semaste goto done; 487167160Semaste } 488167160Semaste NG_MKRESPONSE(resp, msg, sizeof(*embed), M_DONTWAIT); 489167160Semaste if (resp == NULL) { 490167160Semaste error = ENOMEM; 491167160Semaste goto done; 492167160Semaste } 493167160Semaste embed = (struct ng_source_embed_cnt_info *)resp->data; 494167160Semaste bcopy(&sc->embed_counter[index], embed, sizeof(*embed)); 495167160Semaste 496167160Semaste break; 497167160Semaste } 498106266Sjulian default: 499106266Sjulian error = EINVAL; 500106266Sjulian break; 501106266Sjulian } 502106266Sjulian break; 503106435Sjulian case NGM_ETHER_COOKIE: 504106435Sjulian if (!(msg->header.flags & NGF_RESP)) { 505106435Sjulian error = EINVAL; 506106435Sjulian break; 507106435Sjulian } 508106435Sjulian switch (msg->header.cmd) { 509144674Sglebius case NGM_ETHER_GET_IFNAME: 510144674Sglebius { 511144674Sglebius char *ifname = (char *)msg->data; 512144674Sglebius 513144674Sglebius if (msg->header.arglen < 2) { 514144674Sglebius error = EINVAL; 515144674Sglebius break; 516144674Sglebius } 517144674Sglebius 518144674Sglebius if (ng_source_store_output_ifp(sc, ifname) == 0) 519106435Sjulian ng_source_set_autosrc(sc, 0); 520106435Sjulian break; 521144674Sglebius } 522106435Sjulian default: 523106435Sjulian error = EINVAL; 524106435Sjulian } 525106435Sjulian break; 526106266Sjulian default: 527106266Sjulian error = EINVAL; 528106266Sjulian break; 529106266Sjulian } 530106266Sjulian 531106266Sjuliandone: 532144674Sglebius /* Take care of synchronous response, if any. */ 533106321Sjulian NG_RESPOND_MSG(error, node, item, resp); 534144674Sglebius /* Free the message and return. */ 535106321Sjulian NG_FREE_MSG(msg); 536106266Sjulian return (error); 537106266Sjulian} 538106266Sjulian 539106266Sjulian/* 540106266Sjulian * Receive data on a hook 541106266Sjulian * 542106266Sjulian * If data comes in the input hook, enqueue it on the send queue. 543106266Sjulian * If data comes in the output hook, discard it. 544106266Sjulian */ 545106266Sjulianstatic int 546106321Sjulianng_source_rcvdata(hook_p hook, item_p item) 547106266Sjulian{ 548144674Sglebius sc_p sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); 549144674Sglebius struct mbuf *m; 550106266Sjulian int error = 0; 551106266Sjulian 552106321Sjulian NGI_GET_M(item, m); 553106321Sjulian NG_FREE_ITEM(item); 554106266Sjulian 555106266Sjulian /* Which hook? */ 556144674Sglebius if (hook == sc->output) { 557106266Sjulian /* discard */ 558106321Sjulian NG_FREE_M(m); 559106266Sjulian return (error); 560106266Sjulian } 561144674Sglebius KASSERT(hook == sc->input, ("%s: no hook!", __func__)); 562106266Sjulian 563144674Sglebius /* Enqueue packet. */ 564106266Sjulian /* XXX should we check IF_QFULL() ? */ 565125031Sharti _IF_ENQUEUE(&sc->snd_queue, m); 566106266Sjulian sc->queueOctets += m->m_pkthdr.len; 567167160Semaste sc->last_packet = m; 568106266Sjulian 569106266Sjulian return (0); 570106266Sjulian} 571106266Sjulian 572106266Sjulian/* 573106266Sjulian * Shutdown processing 574106266Sjulian */ 575106266Sjulianstatic int 576106266Sjulianng_source_rmnode(node_p node) 577106266Sjulian{ 578144674Sglebius sc_p sc = NG_NODE_PRIVATE(node); 579106266Sjulian 580106266Sjulian ng_source_stop(sc); 581106266Sjulian ng_source_clr_data(sc); 582106321Sjulian NG_NODE_SET_PRIVATE(node, NULL); 583106321Sjulian NG_NODE_UNREF(node); 584125077Sharti free(sc, M_NETGRAPH); 585144674Sglebius 586106266Sjulian return (0); 587106266Sjulian} 588106266Sjulian 589106266Sjulian/* 590106266Sjulian * Hook disconnection 591106266Sjulian */ 592106266Sjulianstatic int 593106266Sjulianng_source_disconnect(hook_p hook) 594106266Sjulian{ 595106319Sjulian sc_p sc; 596106266Sjulian 597106321Sjulian sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); 598125077Sharti KASSERT(sc != NULL, ("%s: null node private", __func__)); 599144674Sglebius if (NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0 || hook == sc->output) 600106321Sjulian ng_rmnode_self(NG_HOOK_NODE(hook)); 601106266Sjulian return (0); 602106266Sjulian} 603106266Sjulian 604106266Sjulian/* 605218909Sbrucec * Set sc->output_ifp to point to the struct ifnet of the interface 606106435Sjulian * reached via our output hook. 607106435Sjulian */ 608106435Sjulianstatic int 609144674Sglebiusng_source_store_output_ifp(sc_p sc, char *ifname) 610106435Sjulian{ 611106435Sjulian struct ifnet *ifp; 612106435Sjulian int s; 613106266Sjulian 614144674Sglebius ifp = ifunit(ifname); 615106266Sjulian 616106266Sjulian if (ifp == NULL) { 617183225Szec printf("%s: can't find interface %s\n", __func__, ifname); 618106266Sjulian return (EINVAL); 619106266Sjulian } 620106266Sjulian sc->output_ifp = ifp; 621106266Sjulian 622106266Sjulian#if 1 623106266Sjulian /* XXX mucking with a drivers ifqueue size is ugly but we need it 624106266Sjulian * to queue a lot of packets to get close to line rate on a gigabit 625106266Sjulian * interface with small packets. 626106266Sjulian * XXX we should restore the original value at stop or disconnect 627106266Sjulian */ 628106266Sjulian s = splimp(); /* XXX is this required? */ 629125077Sharti if (ifp->if_snd.ifq_maxlen < NG_SOURCE_DRIVER_IFQ_MAXLEN) { 630106266Sjulian printf("ng_source: changing ifq_maxlen from %d to %d\n", 631106319Sjulian ifp->if_snd.ifq_maxlen, NG_SOURCE_DRIVER_IFQ_MAXLEN); 632106266Sjulian ifp->if_snd.ifq_maxlen = NG_SOURCE_DRIVER_IFQ_MAXLEN; 633106266Sjulian } 634106266Sjulian splx(s); 635106266Sjulian#endif 636106266Sjulian return (0); 637106266Sjulian} 638106266Sjulian 639106266Sjulian/* 640106266Sjulian * Set the attached ethernet node's ethernet source address override flag. 641106266Sjulian */ 642106266Sjulianstatic int 643144674Sglebiusng_source_set_autosrc(sc_p sc, uint32_t flag) 644106266Sjulian{ 645106266Sjulian struct ng_mesg *msg; 646106266Sjulian int error = 0; 647106266Sjulian 648106266Sjulian NG_MKMESSAGE(msg, NGM_ETHER_COOKIE, NGM_ETHER_SET_AUTOSRC, 649144674Sglebius sizeof (uint32_t), M_NOWAIT); 650106266Sjulian if (msg == NULL) 651106266Sjulian return(ENOBUFS); 652106266Sjulian 653144674Sglebius *(uint32_t *)msg->data = flag; 654144674Sglebius NG_SEND_MSG_HOOK(error, sc->node, msg, sc->output, 0); 655106266Sjulian return (error); 656106266Sjulian} 657106266Sjulian 658106266Sjulian/* 659106266Sjulian * Clear out the data we've queued 660106266Sjulian */ 661106266Sjulianstatic void 662106266Sjulianng_source_clr_data (sc_p sc) 663106266Sjulian{ 664106266Sjulian struct mbuf *m; 665106266Sjulian 666106266Sjulian for (;;) { 667125031Sharti _IF_DEQUEUE(&sc->snd_queue, m); 668106266Sjulian if (m == NULL) 669106266Sjulian break; 670106266Sjulian NG_FREE_M(m); 671106266Sjulian } 672106266Sjulian sc->queueOctets = 0; 673167168Semaste sc->last_packet = NULL; 674106266Sjulian} 675106266Sjulian 676106266Sjulian/* 677106266Sjulian * Start sending queued data out the output hook 678106266Sjulian */ 679144674Sglebiusstatic int 680144674Sglebiusng_source_start(sc_p sc, uint64_t packets) 681106266Sjulian{ 682144674Sglebius if (sc->output_ifp == NULL) { 683144674Sglebius printf("ng_source: start without iface configured\n"); 684144674Sglebius return (ENXIO); 685144674Sglebius } 686144674Sglebius 687144674Sglebius if (sc->node->nd_flags & NG_SOURCE_ACTIVE) 688144674Sglebius return (EBUSY); 689144674Sglebius 690144674Sglebius sc->node->nd_flags |= NG_SOURCE_ACTIVE; 691144674Sglebius 692144674Sglebius sc->packets = packets; 693144674Sglebius timevalclear(&sc->stats.elapsedTime); 694144674Sglebius timevalclear(&sc->stats.endTime); 695144674Sglebius getmicrotime(&sc->stats.startTime); 696153690Sglebius getmicrotime(&sc->stats.lastTime); 697144674Sglebius ng_callout(&sc->intr_ch, sc->node, NULL, 0, 698144674Sglebius ng_source_intr, sc, 0); 699144674Sglebius 700144674Sglebius return (0); 701106266Sjulian} 702106266Sjulian 703106266Sjulian/* 704106266Sjulian * Stop sending queued data out the output hook 705106266Sjulian */ 706106266Sjulianstatic void 707144674Sglebiusng_source_stop(sc_p sc) 708106266Sjulian{ 709144674Sglebius ng_uncallout(&sc->intr_ch, sc->node); 710144674Sglebius sc->node->nd_flags &= ~NG_SOURCE_ACTIVE; 711144674Sglebius getmicrotime(&sc->stats.endTime); 712144674Sglebius sc->stats.elapsedTime = sc->stats.endTime; 713144674Sglebius timevalsub(&sc->stats.elapsedTime, &sc->stats.startTime); 714106266Sjulian} 715106266Sjulian 716106266Sjulian/* 717106266Sjulian * While active called every NG_SOURCE_INTR_TICKS ticks. 718106266Sjulian * Sends as many packets as the interface connected to our 719106266Sjulian * output hook is able to enqueue. 720106266Sjulian */ 721106266Sjulianstatic void 722125243Sharting_source_intr(node_p node, hook_p hook, void *arg1, int arg2) 723106266Sjulian{ 724125243Sharti sc_p sc = (sc_p)arg1; 725106266Sjulian struct ifqueue *ifq; 726106266Sjulian int packets; 727106266Sjulian 728125077Sharti KASSERT(sc != NULL, ("%s: null node private", __func__)); 729106266Sjulian 730144674Sglebius if (sc->packets == 0 || sc->output == NULL 731106321Sjulian || (sc->node->nd_flags & NG_SOURCE_ACTIVE) == 0) { 732106266Sjulian ng_source_stop(sc); 733106266Sjulian return; 734106266Sjulian } 735106266Sjulian 736125033Sharti if (sc->output_ifp != NULL) { 737141745Sru ifq = (struct ifqueue *)&sc->output_ifp->if_snd; 738125033Sharti packets = ifq->ifq_maxlen - ifq->ifq_len; 739125033Sharti } else 740125033Sharti packets = sc->snd_queue.ifq_len; 741125033Sharti 742153690Sglebius if (sc->stats.maxPps != 0) { 743153690Sglebius struct timeval now, elapsed; 744153690Sglebius uint64_t usec; 745153690Sglebius int maxpkt; 746153690Sglebius 747153690Sglebius getmicrotime(&now); 748153690Sglebius elapsed = now; 749153690Sglebius timevalsub(&elapsed, &sc->stats.lastTime); 750153690Sglebius usec = elapsed.tv_sec * 1000000 + elapsed.tv_usec; 751153690Sglebius maxpkt = (uint64_t)sc->stats.maxPps * usec / 1000000; 752153690Sglebius sc->stats.lastTime = now; 753153690Sglebius if (packets > maxpkt) 754153690Sglebius packets = maxpkt; 755153690Sglebius } 756153690Sglebius 757106266Sjulian ng_source_send(sc, packets, NULL); 758125243Sharti if (sc->packets == 0) 759106266Sjulian ng_source_stop(sc); 760125243Sharti else 761138268Sglebius ng_callout(&sc->intr_ch, node, NULL, NG_SOURCE_INTR_TICKS, 762137136Sglebius ng_source_intr, sc, 0); 763106266Sjulian} 764106266Sjulian 765106266Sjulian/* 766154707Sglebius * Send packets out our output hook. 767106266Sjulian */ 768106266Sjulianstatic int 769154707Sglebiusng_source_send(sc_p sc, int tosend, int *sent_p) 770106266Sjulian{ 771106266Sjulian struct mbuf *m, *m2; 772154707Sglebius int sent; 773106266Sjulian int error = 0; 774106266Sjulian 775125077Sharti KASSERT(tosend >= 0, ("%s: negative tosend param", __func__)); 776106321Sjulian KASSERT(sc->node->nd_flags & NG_SOURCE_ACTIVE, 777125077Sharti ("%s: inactive node", __func__)); 778106266Sjulian 779144674Sglebius if ((uint64_t)tosend > sc->packets) 780106266Sjulian tosend = sc->packets; 781106266Sjulian 782154707Sglebius /* Go through the queue sending packets one by one. */ 783106266Sjulian for (sent = 0; error == 0 && sent < tosend; ++sent) { 784125031Sharti _IF_DEQUEUE(&sc->snd_queue, m); 785106266Sjulian if (m == NULL) 786106266Sjulian break; 787106266Sjulian 788167156Semaste /* Duplicate and modify the packet. */ 789167156Semaste error = ng_source_dup_mod(sc, m, &m2); 790167156Semaste if (error) { 791167156Semaste if (error == ENOBUFS) 792167156Semaste _IF_PREPEND(&sc->snd_queue, m); 793167156Semaste else 794167156Semaste _IF_ENQUEUE(&sc->snd_queue, m); 795106266Sjulian break; 796106266Sjulian } 797106266Sjulian 798144674Sglebius /* Re-enqueue the original packet for us. */ 799125031Sharti _IF_ENQUEUE(&sc->snd_queue, m); 800106266Sjulian 801154707Sglebius sc->stats.outFrames++; 802154707Sglebius sc->stats.outOctets += m2->m_pkthdr.len; 803154707Sglebius NG_SEND_DATA_ONLY(error, sc->output, m2); 804154707Sglebius if (error) 805106266Sjulian break; 806106266Sjulian } 807106266Sjulian 808106266Sjulian sc->packets -= sent; 809106266Sjulian if (sent_p != NULL) 810106266Sjulian *sent_p = sent; 811106266Sjulian return (error); 812106266Sjulian} 813167156Semaste 814167156Semaste/* 815167156Semaste * Modify packet in 'm' by changing 'len' bytes starting at 'offset' 816167156Semaste * to data in 'cp'. 817167156Semaste * 818167156Semaste * The packet data in 'm' must be in a contiguous buffer in a single mbuf. 819167156Semaste */ 820167156Semastestatic void 821167156Semasteng_source_packet_mod(sc_p sc, struct mbuf *m, int offset, int len, caddr_t cp, 822167156Semaste int flags) 823167156Semaste{ 824167156Semaste if (len == 0) 825167156Semaste return; 826167156Semaste 827167156Semaste /* Can't modify beyond end of packet. */ 828167156Semaste /* TODO: Pad packet for this case. */ 829167156Semaste if (offset + len > m->m_len) 830167156Semaste return; 831167156Semaste 832167156Semaste bcopy(cp, mtod_off(m, offset, caddr_t), len); 833167156Semaste} 834167156Semaste 835167160Semastestatic void 836167160Semasteng_source_mod_counter(sc_p sc, struct ng_source_embed_cnt_info *cnt, 837167160Semaste struct mbuf *m, int increment) 838167160Semaste{ 839167160Semaste caddr_t cp; 840167160Semaste uint32_t val; 841167160Semaste 842167160Semaste val = htonl(cnt->next_val); 843167160Semaste cp = (caddr_t)&val + sizeof(val) - cnt->width; 844167160Semaste ng_source_packet_mod(sc, m, cnt->offset, cnt->width, cp, cnt->flags); 845167160Semaste 846167160Semaste if (increment) { 847167160Semaste cnt->next_val += increment; 848167160Semaste 849167160Semaste if (increment > 0 && cnt->next_val > cnt->max_val) { 850167160Semaste cnt->next_val = cnt->min_val - 1 + 851167160Semaste (cnt->next_val - cnt->max_val); 852167160Semaste if (cnt->next_val > cnt->max_val) 853167160Semaste cnt->next_val = cnt->max_val; 854167160Semaste } else if (increment < 0 && cnt->next_val < cnt->min_val) { 855167160Semaste cnt->next_val = cnt->max_val + 1 + 856167160Semaste (cnt->next_val - cnt->min_val); 857167160Semaste if (cnt->next_val < cnt->min_val) 858167160Semaste cnt->next_val = cnt->max_val; 859167160Semaste } 860167160Semaste } 861167160Semaste} 862167160Semaste 863167156Semastestatic int 864167156Semasteng_source_dup_mod(sc_p sc, struct mbuf *m0, struct mbuf **m_ptr) 865167156Semaste{ 866167156Semaste struct mbuf *m; 867167160Semaste struct ng_source_embed_cnt_info *cnt; 868167156Semaste struct ng_source_embed_info *ts; 869167156Semaste int modify; 870167156Semaste int error = 0; 871167160Semaste int i, increment; 872167156Semaste 873167156Semaste /* Are we going to modify packets? */ 874167156Semaste modify = sc->embed_timestamp.flags & NGM_SOURCE_EMBED_ENABLE; 875167160Semaste for (i = 0; !modify && i < NG_SOURCE_COUNTERS; ++i) 876167160Semaste modify = sc->embed_counter[i].flags & NGM_SOURCE_EMBED_ENABLE; 877167156Semaste 878167156Semaste /* Duplicate the packet. */ 879167156Semaste if (modify) 880167156Semaste m = m_dup(m0, M_DONTWAIT); 881167156Semaste else 882167156Semaste m = m_copypacket(m0, M_DONTWAIT); 883167156Semaste if (m == NULL) { 884167156Semaste error = ENOBUFS; 885167156Semaste goto done; 886167156Semaste } 887167156Semaste *m_ptr = m; 888167156Semaste 889167156Semaste if (!modify) 890167156Semaste goto done; 891167156Semaste 892167156Semaste /* Modify the copied packet for sending. */ 893167156Semaste KASSERT(M_WRITABLE(m), ("%s: packet not writable", __func__)); 894167156Semaste 895167160Semaste for (i = 0; i < NG_SOURCE_COUNTERS; ++i) { 896167160Semaste cnt = &sc->embed_counter[i]; 897167160Semaste if (cnt->flags & NGM_SOURCE_EMBED_ENABLE) { 898167160Semaste if ((cnt->flags & NGM_SOURCE_INC_CNT_PER_LIST) == 0 || 899167160Semaste sc->last_packet == m0) 900167160Semaste increment = cnt->increment; 901167160Semaste else 902167160Semaste increment = 0; 903167160Semaste ng_source_mod_counter(sc, cnt, m, increment); 904167160Semaste } 905167160Semaste } 906167160Semaste 907167156Semaste ts = &sc->embed_timestamp; 908167156Semaste if (ts->flags & NGM_SOURCE_EMBED_ENABLE) { 909167156Semaste struct timeval now; 910167156Semaste getmicrotime(&now); 911167156Semaste now.tv_sec = htonl(now.tv_sec); 912167156Semaste now.tv_usec = htonl(now.tv_usec); 913167156Semaste ng_source_packet_mod(sc, m, ts->offset, sizeof (now), 914167156Semaste (caddr_t)&now, ts->flags); 915167156Semaste } 916167156Semaste 917167156Semastedone: 918167156Semaste return(error); 919167156Semaste} 920