ng_source.c revision 106321
1106266Sjulian/* 2106266Sjulian * ng_source.c 3106266Sjulian * 4106266Sjulian * Copyright 2002 Sandvine Inc. 5106266Sjulian * All rights reserved. 6106266Sjulian * 7106266Sjulian * Subject to the following obligations and disclaimer of warranty, use and 8106266Sjulian * redistribution of this software, in source or object code forms, with or 9106319Sjulian * without modifications are expressly permitted by Sandvine Inc.; provided, 10106266Sjulian * however, that: 11106319Sjulian * 1. Any and all reproductions of the source or object code must include the 12106319Sjulian * copyright notice above and the following disclaimer of warranties; and 13106266Sjulian * 2. No rights are granted, in any manner or form, to use Sandvine Inc. 14106319Sjulian * trademarks, including the mark "SANDVINE" on advertising, endorsements, 15106319Sjulian * or otherwise except as such appears in the above copyright notice or in 16106266Sjulian * the software. 17106266Sjulian * 18106266Sjulian * THIS SOFTWARE IS BEING PROVIDED BY SANDVINE "AS IS", AND TO THE MAXIMUM 19106319Sjulian * EXTENT PERMITTED BY LAW, SANDVINE MAKES NO REPRESENTATIONS OR WARRANTIES, 20106319Sjulian * EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE, INCLUDING WITHOUT LIMITATION, 21106319Sjulian * ANY AND ALL IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR 22106266Sjulian * PURPOSE, OR NON-INFRINGEMENT. SANDVINE DOES NOT WARRANT, GUARANTEE, OR 23106266Sjulian * MAKE ANY REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE 24106266Sjulian * USE OF THIS SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY 25106266Sjulian * OR OTHERWISE. IN NO EVENT SHALL SANDVINE BE LIABLE FOR ANY DAMAGES 26106266Sjulian * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING 27106319Sjulian * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, 28106266Sjulian * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR 29106266Sjulian * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY 30106266Sjulian * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 31106266Sjulian * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 32106266Sjulian * THIS SOFTWARE, EVEN IF SANDVINE IS ADVISED OF THE POSSIBILITY OF SUCH 33106266Sjulian * DAMAGE. 34106266Sjulian * 35106266Sjulian * Author: Dave Chapeskie <dchapeskie@sandvine.com> 36106266Sjulian * 37106266Sjulian * $FreeBSD: head/sys/netgraph/ng_source.c 106321 2002-11-02 02:29:43Z julian $ 38106266Sjulian */ 39106266Sjulian 40106266Sjulian/* 41106266Sjulian * This node is used for high speed packet geneneration. It queues 42106266Sjulian * all data recieved on it's 'input' hook and when told to start via 43106266Sjulian * a control message it sends the packets out it's 'output' hook. In 44106266Sjulian * this way this node can be preloaded with a packet stream which is 45106266Sjulian * continuously sent. 46106266Sjulian * 47106266Sjulian * Currently it just copies the mbufs as required. It could do various 48106266Sjulian * tricks to try and avoid this. Probably the best performance would 49106266Sjulian * be achieved by modifying the appropriate drivers to be told to 50106266Sjulian * self-re-enqueue packets (e.g. the if_bge driver could reuse the same 51106266Sjulian * transmit descriptors) under control of this node; perhaps via some 52106266Sjulian * flag in the mbuf or some such. The node would peak at an appropriate 53106266Sjulian * ifnet flag to see if such support is available for the connected 54106266Sjulian * interface. 55106266Sjulian */ 56106266Sjulian 57106266Sjulian#include <sys/param.h> 58106266Sjulian#include <sys/systm.h> 59106266Sjulian#include <sys/errno.h> 60106266Sjulian#include <sys/kernel.h> 61106266Sjulian#include <sys/malloc.h> 62106266Sjulian#include <sys/mbuf.h> 63106266Sjulian#include <sys/socket.h> 64106266Sjulian#include <net/if.h> 65106266Sjulian#include <net/if_var.h> 66106266Sjulian#include <netgraph/ng_message.h> 67106266Sjulian#include <netgraph/netgraph.h> 68106266Sjulian#include <netgraph/ng_parse.h> 69106266Sjulian#include <netgraph/ng_ether.h> 70106266Sjulian#include <netgraph/ng_source.h> 71106266Sjulian 72106266Sjulian#define NG_SOURCE_INTR_TICKS 1 73106266Sjulian#define NG_SOURCE_DRIVER_IFQ_MAXLEN (4*1024) 74106266Sjulian 75106266Sjulian 76106266Sjulian/* Per hook info */ 77106266Sjulianstruct source_hookinfo { 78106266Sjulian hook_p hook; 79106266Sjulian}; 80106266Sjulian 81106266Sjulian/* Per node info */ 82106266Sjulianstruct privdata { 83106266Sjulian node_p node; 84106266Sjulian struct source_hookinfo input; 85106266Sjulian struct source_hookinfo output; 86106266Sjulian struct ng_source_stats stats; 87106319Sjulian struct ifqueue snd_queue; /* packets to send */ 88106266Sjulian struct ifnet *output_ifp; 89106266Sjulian struct callout_handle intr_ch; 90106319Sjulian u_int64_t packets; /* packets to send */ 91106266Sjulian u_int32_t queueOctets; 92106266Sjulian}; 93106266Sjuliantypedef struct privdata *sc_p; 94106266Sjulian 95106266Sjulian/* Node flags */ 96106266Sjulian#define NG_SOURCE_ACTIVE (NGF_TYPE1) 97106266Sjulian 98106266Sjulian/* XXX */ 99106266Sjulian#if 1 100106266Sjulian#undef KASSERT 101106266Sjulian#define KASSERT(expr,msg) do { \ 102106266Sjulian if (!(expr)) { \ 103106266Sjulian printf msg ; \ 104106266Sjulian panic("Assertion"); \ 105106266Sjulian } \ 106106266Sjulian } while(0) 107106266Sjulian#endif 108106266Sjulian 109106266Sjulian/* Netgraph methods */ 110106266Sjulianstatic ng_constructor_t ng_source_constructor; 111106266Sjulianstatic ng_rcvmsg_t ng_source_rcvmsg; 112106266Sjulianstatic ng_shutdown_t ng_source_rmnode; 113106266Sjulianstatic ng_newhook_t ng_source_newhook; 114106266Sjulianstatic ng_rcvdata_t ng_source_rcvdata; 115106266Sjulianstatic ng_disconnect_t ng_source_disconnect; 116106266Sjulian 117106266Sjulian/* Other functions */ 118106266Sjulianstatic timeout_t ng_source_intr; 119106266Sjulianstatic int ng_source_get_output_ifp (sc_p); 120106266Sjulianstatic void ng_source_clr_data (sc_p); 121106266Sjulianstatic void ng_source_start (sc_p); 122106266Sjulianstatic void ng_source_stop (sc_p); 123106266Sjulianstatic int ng_source_send (sc_p, int, int *); 124106266Sjulian 125106266Sjulian 126106266Sjulian/* Parse type for timeval */ 127106266Sjulianstatic const struct ng_parse_struct_field ng_source_timeval_type_fields[] = 128106266Sjulian{ 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 146106266Sjulian/* List of commands and how to convert arguments to/from ASCII */ 147106266Sjulianstatic const struct ng_cmdlist ng_source_cmds[] = { 148106266Sjulian { 149106266Sjulian NGM_SOURCE_COOKIE, 150106266Sjulian NGM_SOURCE_GET_STATS, 151106266Sjulian "getstats", 152106266Sjulian NULL, 153106266Sjulian &ng_source_stats_type 154106266Sjulian }, 155106266Sjulian { 156106266Sjulian NGM_SOURCE_COOKIE, 157106266Sjulian NGM_SOURCE_CLR_STATS, 158106266Sjulian "clrstats", 159106266Sjulian NULL, 160106266Sjulian NULL 161106266Sjulian }, 162106266Sjulian { 163106266Sjulian NGM_SOURCE_COOKIE, 164106266Sjulian NGM_SOURCE_GETCLR_STATS, 165106266Sjulian "getclrstats", 166106266Sjulian NULL, 167106266Sjulian &ng_source_stats_type 168106266Sjulian }, 169106266Sjulian { 170106266Sjulian NGM_SOURCE_COOKIE, 171106266Sjulian NGM_SOURCE_START, 172106266Sjulian "start", 173106266Sjulian &ng_parse_uint64_type, 174106266Sjulian NULL 175106266Sjulian }, 176106266Sjulian { 177106266Sjulian NGM_SOURCE_COOKIE, 178106266Sjulian NGM_SOURCE_STOP, 179106266Sjulian "stop", 180106266Sjulian NULL, 181106266Sjulian NULL 182106266Sjulian }, 183106266Sjulian { 184106266Sjulian NGM_SOURCE_COOKIE, 185106266Sjulian NGM_SOURCE_CLR_DATA, 186106266Sjulian "clrdata", 187106266Sjulian NULL, 188106266Sjulian NULL 189106266Sjulian }, 190106266Sjulian { 0 } 191106266Sjulian}; 192106266Sjulian 193106266Sjulian/* Netgraph type descriptor */ 194106266Sjulianstatic struct ng_type ng_source_typestruct = { 195106266Sjulian NG_VERSION, 196106266Sjulian NG_SOURCE_NODE_TYPE, 197106266Sjulian NULL, /* module event handler */ 198106266Sjulian ng_source_constructor, 199106266Sjulian ng_source_rcvmsg, 200106266Sjulian ng_source_rmnode, 201106266Sjulian ng_source_newhook, 202106266Sjulian NULL, /* findhook */ 203106266Sjulian NULL, 204106266Sjulian ng_source_rcvdata, /* rcvdata */ 205106266Sjulian ng_source_disconnect, 206106266Sjulian ng_source_cmds 207106266Sjulian}; 208106266SjulianNETGRAPH_INIT(source, &ng_source_typestruct); 209106266Sjulian 210106266Sjulian/* 211106266Sjulian * Node constructor 212106266Sjulian */ 213106266Sjulianstatic int 214106321Sjulianng_source_constructor(node_p node) 215106266Sjulian{ 216106266Sjulian sc_p sc; 217106266Sjulian 218106266Sjulian MALLOC(sc, sc_p, sizeof(*sc), M_NETGRAPH, M_NOWAIT); 219106266Sjulian if (sc == NULL) 220106266Sjulian return (ENOMEM); 221106266Sjulian bzero(sc, sizeof(*sc)); 222106266Sjulian 223106321Sjulian NG_NODE_SET_PRIVATE(node, sc); 224106321Sjulian sc->node = node; 225106266Sjulian sc->snd_queue.ifq_maxlen = 2048; /* XXX not checked */ 226106321Sjulian callout_handle_init(&sc->intr_ch); /* XXX fix.. will 227106321Sjulian cause problems. */ 228106266Sjulian return (0); 229106266Sjulian} 230106266Sjulian 231106266Sjulian/* 232106266Sjulian * Add a hook 233106266Sjulian */ 234106266Sjulianstatic int 235106266Sjulianng_source_newhook(node_p node, hook_p hook, const char *name) 236106266Sjulian{ 237106321Sjulian sc_p sc; 238106266Sjulian 239106321Sjulian sc = NG_NODE_PRIVATE(node); 240106266Sjulian KASSERT(sc != NULL, ("%s: null node private", __FUNCTION__)); 241106266Sjulian if (strcmp(name, NG_SOURCE_HOOK_INPUT) == 0) { 242106266Sjulian sc->input.hook = hook; 243106321Sjulian NG_HOOK_SET_PRIVATE(hook, &sc->input); 244106266Sjulian } else if (strcmp(name, NG_SOURCE_HOOK_OUTPUT) == 0) { 245106266Sjulian sc->output.hook = hook; 246106321Sjulian NG_HOOK_SET_PRIVATE(hook, &sc->output); 247106266Sjulian sc->output_ifp = 0; 248106266Sjulian bzero(&sc->stats, sizeof(sc->stats)); 249106266Sjulian } else 250106266Sjulian return (EINVAL); 251106266Sjulian return (0); 252106266Sjulian} 253106266Sjulian 254106266Sjulian/* 255106266Sjulian * Receive a control message 256106266Sjulian */ 257106266Sjulianstatic int 258106321Sjulianng_source_rcvmsg(node_p node, item_p item, hook_p lasthook) 259106266Sjulian{ 260106321Sjulian sc_p sc; 261106266Sjulian struct ng_mesg *resp = NULL; 262106266Sjulian int error = 0; 263106321Sjulian struct ng_mesg *msg; 264106266Sjulian 265106321Sjulian sc = NG_NODE_PRIVATE(node); 266106321Sjulian NGI_GET_MSG(item, msg); 267106266Sjulian KASSERT(sc != NULL, ("%s: null node private", __FUNCTION__)); 268106266Sjulian switch (msg->header.typecookie) { 269106266Sjulian case NGM_SOURCE_COOKIE: 270106266Sjulian switch (msg->header.cmd) { 271106266Sjulian case NGM_SOURCE_GET_STATS: 272106266Sjulian case NGM_SOURCE_CLR_STATS: 273106266Sjulian case NGM_SOURCE_GETCLR_STATS: 274106266Sjulian { 275106266Sjulian struct ng_source_stats *stats; 276106266Sjulian 277106266Sjulian if (msg->header.cmd != NGM_SOURCE_CLR_STATS) { 278106266Sjulian NG_MKRESPONSE(resp, msg, 279106266Sjulian sizeof(*stats), M_NOWAIT); 280106266Sjulian if (resp == NULL) { 281106266Sjulian error = ENOMEM; 282106266Sjulian goto done; 283106266Sjulian } 284106266Sjulian sc->stats.queueOctets = sc->queueOctets; 285106319Sjulian sc->stats.queueFrames = sc->snd_queue.ifq_len; 286106321Sjulian if ((sc->node->nd_flags & NG_SOURCE_ACTIVE) 287106266Sjulian && !timevalisset(&sc->stats.endTime)) { 288106319Sjulian getmicrotime(&sc->stats.elapsedTime); 289106266Sjulian timevalsub(&sc->stats.elapsedTime, 290106319Sjulian &sc->stats.startTime); 291106266Sjulian } 292106319Sjulian stats = (struct ng_source_stats *)resp->data; 293106266Sjulian bcopy(&sc->stats, stats, sizeof(* stats)); 294106266Sjulian } 295106266Sjulian if (msg->header.cmd != NGM_SOURCE_GET_STATS) 296106266Sjulian bzero(&sc->stats, sizeof(sc->stats)); 297106266Sjulian } 298106266Sjulian break; 299106266Sjulian case NGM_SOURCE_START: 300106266Sjulian { 301106266Sjulian u_int64_t packets = *(u_int64_t *)msg->data; 302106266Sjulian if (sc->output.hook == NULL) { 303106319Sjulian printf("%s: start on node with no output hook\n" 304106319Sjulian , __FUNCTION__); 305106266Sjulian error = EINVAL; 306106266Sjulian break; 307106266Sjulian } 308106266Sjulian /* TODO validation of packets */ 309106266Sjulian sc->packets = packets; 310106266Sjulian ng_source_start(sc); 311106266Sjulian } 312106266Sjulian break; 313106266Sjulian case NGM_SOURCE_STOP: 314106266Sjulian ng_source_stop(sc); 315106266Sjulian break; 316106266Sjulian case NGM_SOURCE_CLR_DATA: 317106266Sjulian ng_source_clr_data(sc); 318106266Sjulian break; 319106266Sjulian default: 320106266Sjulian error = EINVAL; 321106266Sjulian break; 322106266Sjulian } 323106266Sjulian break; 324106266Sjulian default: 325106266Sjulian error = EINVAL; 326106266Sjulian break; 327106266Sjulian } 328106266Sjulian 329106266Sjuliandone: 330106321Sjulian /* Take care of synchronous response, if any */ 331106321Sjulian NG_RESPOND_MSG(error, node, item, resp); 332106321Sjulian /* Free the message and return */ 333106321Sjulian NG_FREE_MSG(msg); 334106266Sjulian return (error); 335106266Sjulian} 336106266Sjulian 337106266Sjulian/* 338106266Sjulian * Receive data on a hook 339106266Sjulian * 340106266Sjulian * If data comes in the input hook, enqueue it on the send queue. 341106266Sjulian * If data comes in the output hook, discard it. 342106266Sjulian */ 343106266Sjulianstatic int 344106321Sjulianng_source_rcvdata(hook_p hook, item_p item) 345106266Sjulian{ 346106321Sjulian sc_p sc; 347106321Sjulian struct source_hookinfo *hinfo; 348106266Sjulian int error = 0; 349106321Sjulian struct mbuf *m; 350106266Sjulian 351106321Sjulian sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); 352106321Sjulian NGI_GET_M(item, m); 353106321Sjulian NG_FREE_ITEM(item); 354106321Sjulian hinfo = NG_HOOK_PRIVATE(hook); 355106266Sjulian KASSERT(sc != NULL, ("%s: null node private", __FUNCTION__)); 356106266Sjulian KASSERT(hinfo != NULL, ("%s: null hook info", __FUNCTION__)); 357106266Sjulian 358106266Sjulian /* Which hook? */ 359106266Sjulian if (hinfo == &sc->output) { 360106266Sjulian /* discard */ 361106321Sjulian NG_FREE_M(m); 362106266Sjulian return (error); 363106266Sjulian } 364106266Sjulian KASSERT(hinfo == &sc->input, ("%s: no hook!", __FUNCTION__)); 365106266Sjulian 366106266Sjulian if ((m->m_flags & M_PKTHDR) == 0) { 367106266Sjulian printf("%s: mbuf without PKTHDR\n", __FUNCTION__); 368106321Sjulian NG_FREE_M(m); 369106266Sjulian return (EINVAL); 370106266Sjulian } 371106266Sjulian 372106266Sjulian /* enque packet */ 373106266Sjulian /* XXX should we check IF_QFULL() ? */ 374106266Sjulian IF_ENQUEUE(&sc->snd_queue, m); 375106266Sjulian sc->queueOctets += m->m_pkthdr.len; 376106266Sjulian 377106266Sjulian return (0); 378106266Sjulian} 379106266Sjulian 380106266Sjulian/* 381106266Sjulian * Shutdown processing 382106266Sjulian */ 383106266Sjulianstatic int 384106266Sjulianng_source_rmnode(node_p node) 385106266Sjulian{ 386106321Sjulian sc_p sc; 387106266Sjulian 388106321Sjulian sc = NG_NODE_PRIVATE(node); 389106266Sjulian KASSERT(sc != NULL, ("%s: null node private", __FUNCTION__)); 390106321Sjulian node->nd_flags |= NG_INVALID; 391106266Sjulian ng_source_stop(sc); 392106266Sjulian ng_source_clr_data(sc); 393106321Sjulian NG_NODE_SET_PRIVATE(node, NULL); 394106321Sjulian NG_NODE_UNREF(node); 395106266Sjulian FREE(sc, M_NETGRAPH); 396106266Sjulian return (0); 397106266Sjulian} 398106266Sjulian 399106266Sjulian/* 400106266Sjulian * Hook disconnection 401106266Sjulian */ 402106266Sjulianstatic int 403106266Sjulianng_source_disconnect(hook_p hook) 404106266Sjulian{ 405106321Sjulian struct source_hookinfo *hinfo; 406106319Sjulian sc_p sc; 407106266Sjulian 408106321Sjulian hinfo = NG_HOOK_PRIVATE(hook); 409106321Sjulian sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); 410106266Sjulian KASSERT(sc != NULL, ("%s: null node private", __FUNCTION__)); 411106266Sjulian hinfo->hook = NULL; 412106321Sjulian if (NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0 || hinfo == &sc->output) 413106321Sjulian ng_rmnode_self(NG_HOOK_NODE(hook)); 414106266Sjulian return (0); 415106266Sjulian} 416106266Sjulian 417106266Sjulian/* 418106266Sjulian * Set sc->output_ifp to point to the the struct ifnet of the interface 419106266Sjulian * reached via our output hook. 420106266Sjulian */ 421106266Sjulianstatic int 422106266Sjulianng_source_get_output_ifp(sc_p sc) 423106266Sjulian{ 424106266Sjulian struct ng_mesg *msg, *rsp; 425106266Sjulian struct ifnet *ifp; 426106266Sjulian u_int32_t if_index; 427106266Sjulian int error = 0; 428106266Sjulian int s; 429106266Sjulian 430106266Sjulian sc->output_ifp = NULL; 431106266Sjulian 432106266Sjulian /* Ask the attached node for the connected interface's index */ 433106319Sjulian NG_MKMESSAGE(msg, NGM_ETHER_COOKIE, NGM_ETHER_GET_IFINDEX, 0, M_NOWAIT); 434106266Sjulian if (msg == NULL) 435106266Sjulian return (ENOBUFS); 436106266Sjulian 437106321Sjulian NG_SEND_MSG_HOOK(error, sc->node, msg, sc->output.hook, NULL); 438106321Sjulian /* error = ng_send_msg(sc->node, msg, NG_SOURCE_HOOK_OUTPUT, &rsp); */ 439106321Sjulian#warn "oiks" 440106266Sjulian if (error != 0) 441106266Sjulian return (error); 442106266Sjulian 443106266Sjulian if (rsp == NULL) 444106266Sjulian return (EINVAL); 445106266Sjulian 446106266Sjulian if (rsp->header.arglen < sizeof(u_int32_t)) 447106266Sjulian return (EINVAL); 448106266Sjulian 449106266Sjulian if_index = *(u_int32_t *)rsp->data; 450106266Sjulian /* Could use ifindex2ifnet[if_index] except that we have no 451106266Sjulian * way of verifying if_index is valid since if_indexlim is 452106266Sjulian * local to if_attach() 453106266Sjulian */ 454106266Sjulian TAILQ_FOREACH(ifp, &ifnet, if_link) { 455106266Sjulian if (ifp->if_index == if_index) 456106266Sjulian break; 457106266Sjulian } 458106266Sjulian 459106266Sjulian if (ifp == NULL) { 460106319Sjulian printf("%s: can't find interface %d\n", __FUNCTION__, if_index); 461106266Sjulian return (EINVAL); 462106266Sjulian } 463106266Sjulian sc->output_ifp = ifp; 464106266Sjulian 465106266Sjulian#if 1 466106266Sjulian /* XXX mucking with a drivers ifqueue size is ugly but we need it 467106266Sjulian * to queue a lot of packets to get close to line rate on a gigabit 468106266Sjulian * interface with small packets. 469106266Sjulian * XXX we should restore the original value at stop or disconnect 470106266Sjulian */ 471106266Sjulian s = splimp(); /* XXX is this required? */ 472106266Sjulian if (ifp->if_snd.ifq_maxlen < NG_SOURCE_DRIVER_IFQ_MAXLEN) 473106266Sjulian { 474106266Sjulian printf("ng_source: changing ifq_maxlen from %d to %d\n", 475106319Sjulian ifp->if_snd.ifq_maxlen, NG_SOURCE_DRIVER_IFQ_MAXLEN); 476106266Sjulian ifp->if_snd.ifq_maxlen = NG_SOURCE_DRIVER_IFQ_MAXLEN; 477106266Sjulian } 478106266Sjulian splx(s); 479106266Sjulian#endif 480106266Sjulian return (0); 481106266Sjulian} 482106266Sjulian 483106266Sjulian/* 484106266Sjulian * Set the attached ethernet node's ethernet source address override flag. 485106266Sjulian */ 486106266Sjulianstatic int 487106266Sjulianng_source_set_autosrc(sc_p sc, u_int32_t flag) 488106266Sjulian{ 489106266Sjulian struct ng_mesg *msg; 490106266Sjulian int error = 0; 491106266Sjulian 492106266Sjulian NG_MKMESSAGE(msg, NGM_ETHER_COOKIE, NGM_ETHER_SET_AUTOSRC, 493106266Sjulian sizeof (u_int32_t), M_NOWAIT); 494106266Sjulian if (msg == NULL) 495106266Sjulian return(ENOBUFS); 496106266Sjulian 497106266Sjulian *(u_int32_t *)msg->data = flag; 498106321Sjulian NG_SEND_MSG_HOOK(error, sc->node, msg, sc->output.hook, NULL); 499106266Sjulian return (error); 500106266Sjulian} 501106266Sjulian 502106266Sjulian/* 503106266Sjulian * Clear out the data we've queued 504106266Sjulian */ 505106266Sjulianstatic void 506106266Sjulianng_source_clr_data (sc_p sc) 507106266Sjulian{ 508106266Sjulian struct mbuf *m; 509106266Sjulian 510106266Sjulian for (;;) { 511106266Sjulian IF_DEQUEUE(&sc->snd_queue, m); 512106266Sjulian if (m == NULL) 513106266Sjulian break; 514106266Sjulian NG_FREE_M(m); 515106266Sjulian } 516106266Sjulian sc->queueOctets = 0; 517106266Sjulian} 518106266Sjulian 519106266Sjulian/* 520106266Sjulian * Start sending queued data out the output hook 521106266Sjulian */ 522106266Sjulianstatic void 523106266Sjulianng_source_start (sc_p sc) 524106266Sjulian{ 525106266Sjulian KASSERT(sc->output.hook != NULL, 526106266Sjulian ("%s: output hook unconnected", __FUNCTION__)); 527106321Sjulian if ((sc->node->nd_flags & NG_SOURCE_ACTIVE) == 0) { 528106319Sjulian if (sc->output_ifp == NULL && ng_source_get_output_ifp(sc) != 0) 529106266Sjulian return; 530106266Sjulian ng_source_set_autosrc(sc, 0); 531106321Sjulian sc->node->nd_flags |= NG_SOURCE_ACTIVE; 532106266Sjulian timevalclear(&sc->stats.elapsedTime); 533106266Sjulian timevalclear(&sc->stats.endTime); 534106266Sjulian getmicrotime(&sc->stats.startTime); 535106266Sjulian sc->intr_ch = timeout(ng_source_intr, sc, 0); 536106266Sjulian } 537106266Sjulian} 538106266Sjulian 539106266Sjulian/* 540106266Sjulian * Stop sending queued data out the output hook 541106266Sjulian */ 542106266Sjulianstatic void 543106266Sjulianng_source_stop (sc_p sc) 544106266Sjulian{ 545106321Sjulian if (sc->node->nd_flags & NG_SOURCE_ACTIVE) { 546106266Sjulian untimeout(ng_source_intr, sc, sc->intr_ch); 547106321Sjulian sc->node->nd_flags &= ~NG_SOURCE_ACTIVE; 548106266Sjulian getmicrotime(&sc->stats.endTime); 549106266Sjulian sc->stats.elapsedTime = sc->stats.endTime; 550106266Sjulian timevalsub(&sc->stats.elapsedTime, &sc->stats.startTime); 551106266Sjulian /* XXX should set this to the initial value instead */ 552106266Sjulian ng_source_set_autosrc(sc, 1); 553106266Sjulian } 554106266Sjulian} 555106266Sjulian 556106266Sjulian/* 557106266Sjulian * While active called every NG_SOURCE_INTR_TICKS ticks. 558106266Sjulian * Sends as many packets as the interface connected to our 559106266Sjulian * output hook is able to enqueue. 560106266Sjulian */ 561106266Sjulianstatic void 562106266Sjulianng_source_intr (void *arg) 563106266Sjulian{ 564106321Sjulian sc_p sc = (sc_p) arg; 565106266Sjulian struct ifqueue *ifq; 566106266Sjulian int packets; 567106266Sjulian 568106266Sjulian KASSERT(sc != NULL, ("%s: null node private", __FUNCTION__)); 569106266Sjulian 570106266Sjulian callout_handle_init(&sc->intr_ch); 571106266Sjulian if (sc->packets == 0 || sc->output.hook == NULL 572106321Sjulian || (sc->node->nd_flags & NG_SOURCE_ACTIVE) == 0) { 573106266Sjulian ng_source_stop(sc); 574106266Sjulian return; 575106266Sjulian } 576106266Sjulian 577106266Sjulian ifq = &sc->output_ifp->if_snd; 578106266Sjulian packets = ifq->ifq_maxlen - ifq->ifq_len; 579106266Sjulian ng_source_send(sc, packets, NULL); 580106266Sjulian if (sc->packets == 0) { 581106266Sjulian int s = splnet(); 582106266Sjulian ng_source_stop(sc); 583106266Sjulian splx(s); 584106266Sjulian } else 585106319Sjulian sc->intr_ch = timeout(ng_source_intr, sc, NG_SOURCE_INTR_TICKS); 586106266Sjulian} 587106266Sjulian 588106266Sjulian/* 589106266Sjulian * Send packets out our output hook 590106266Sjulian */ 591106266Sjulianstatic int 592106266Sjulianng_source_send (sc_p sc, int tosend, int *sent_p) 593106266Sjulian{ 594106266Sjulian struct ifqueue tmp_queue; 595106266Sjulian struct mbuf *m, *m2; 596106266Sjulian int sent = 0; 597106266Sjulian int error = 0; 598106266Sjulian int s, s2; 599106266Sjulian 600106266Sjulian KASSERT(sc != NULL, ("%s: null node private", __FUNCTION__)); 601106266Sjulian KASSERT(tosend >= 0, ("%s: negative tosend param", __FUNCTION__)); 602106321Sjulian KASSERT(sc->node->nd_flags & NG_SOURCE_ACTIVE, 603106266Sjulian ("%s: inactive node", __FUNCTION__)); 604106266Sjulian 605106266Sjulian if ((u_int64_t)tosend > sc->packets) 606106266Sjulian tosend = sc->packets; 607106266Sjulian 608106266Sjulian /* Copy the required number of packets to a temporary queue */ 609106266Sjulian bzero (&tmp_queue, sizeof (tmp_queue)); 610106266Sjulian for (sent = 0; error == 0 && sent < tosend; ++sent) { 611106266Sjulian s = splnet(); 612106266Sjulian IF_DEQUEUE(&sc->snd_queue, m); 613106266Sjulian splx(s); 614106266Sjulian if (m == NULL) 615106266Sjulian break; 616106266Sjulian 617106266Sjulian /* duplicate the packet */ 618106266Sjulian m2 = m_copypacket(m, M_NOWAIT); 619106266Sjulian if (m2 == NULL) { 620106266Sjulian s = splnet(); 621106266Sjulian IF_PREPEND(&sc->snd_queue, m); 622106266Sjulian splx(s); 623106266Sjulian error = ENOBUFS; 624106266Sjulian break; 625106266Sjulian } 626106266Sjulian 627106266Sjulian /* re-enqueue the original packet for us */ 628106266Sjulian s = splnet(); 629106266Sjulian IF_ENQUEUE(&sc->snd_queue, m); 630106266Sjulian splx(s); 631106266Sjulian 632106266Sjulian /* queue the copy for sending at smplimp */ 633106266Sjulian IF_ENQUEUE(&tmp_queue, m2); 634106266Sjulian } 635106266Sjulian 636106266Sjulian sent = 0; 637106266Sjulian s = splimp(); 638106266Sjulian for (;;) { 639106266Sjulian IF_DEQUEUE(&tmp_queue, m2); 640106266Sjulian if (m2 == NULL) 641106266Sjulian break; 642106266Sjulian if (error == 0) { 643106266Sjulian ++sent; 644106266Sjulian sc->stats.outFrames++; 645106266Sjulian sc->stats.outOctets += m2->m_pkthdr.len; 646106266Sjulian s2 = splnet(); 647106266Sjulian NG_SEND_DATA_ONLY(error, sc->output.hook, m2); 648106266Sjulian splx(s2); 649106266Sjulian } else { 650106266Sjulian NG_FREE_M(m2); 651106266Sjulian } 652106266Sjulian } 653106266Sjulian splx(s); 654106266Sjulian 655106266Sjulian sc->packets -= sent; 656106266Sjulian if (sent_p != NULL) 657106266Sjulian *sent_p = sent; 658106266Sjulian return (error); 659106266Sjulian} 660