1 /* 2 * pcap-dag.c: Packet capture interface for Emulex EndaceDAG cards. 3 * 4 * The functionality of this code attempts to mimic that of pcap-linux as much 5 * as possible. This code is compiled in several different ways depending on 6 * whether DAG_ONLY and HAVE_DAG_API are defined. If HAVE_DAG_API is not 7 * defined it should not get compiled in, otherwise if DAG_ONLY is defined then 8 * the 'dag_' function calls are renamed to 'pcap_' equivalents. If DAG_ONLY 9 * is not defined then nothing is altered - the dag_ functions will be 10 * called as required from their pcap-linux/bpf equivalents. 11 * 12 * Authors: Richard Littin, Sean Irvine ({richard,sean}@reeltwo.com) 13 * Modifications: Jesper Peterson 14 * Koryn Grant 15 * Stephen Donnelly <stephen.donnelly@emulex.com> 16 */ 17 18 #ifdef HAVE_CONFIG_H 19 #include <config.h> 20 #endif 21 22 #include <sys/param.h> /* optionally get BSD define */ 23 24 #include <stdlib.h> 25 #include <string.h> 26 #include <errno.h> 27 28 #include "pcap-int.h" 29 30 #include <ctype.h> 31 #include <netinet/in.h> 32 #include <sys/mman.h> 33 #include <sys/socket.h> 34 #include <sys/types.h> 35 #include <unistd.h> 36 37 struct mbuf; /* Squelch compiler warnings on some platforms for */ 38 struct rtentry; /* declarations in <net/if.h> */ 39 #include <net/if.h> 40 41 #include "dagnew.h" 42 #include "dagapi.h" 43 #include "dagpci.h" 44 #include "dag_config_api.h" 45 46 #include "pcap-dag.h" 47 48 /* 49 * DAG devices have names beginning with "dag", followed by a number 50 * from 0 to DAG_MAX_BOARDS, then optionally a colon and a stream number 51 * from 0 to DAG_STREAM_MAX. 52 */ 53 #ifndef DAG_MAX_BOARDS 54 #define DAG_MAX_BOARDS 32 55 #endif 56 57 58 #ifndef ERF_TYPE_AAL5 59 #define ERF_TYPE_AAL5 4 60 #endif 61 62 #ifndef ERF_TYPE_MC_HDLC 63 #define ERF_TYPE_MC_HDLC 5 64 #endif 65 66 #ifndef ERF_TYPE_MC_RAW 67 #define ERF_TYPE_MC_RAW 6 68 #endif 69 70 #ifndef ERF_TYPE_MC_ATM 71 #define ERF_TYPE_MC_ATM 7 72 #endif 73 74 #ifndef ERF_TYPE_MC_RAW_CHANNEL 75 #define ERF_TYPE_MC_RAW_CHANNEL 8 76 #endif 77 78 #ifndef ERF_TYPE_MC_AAL5 79 #define ERF_TYPE_MC_AAL5 9 80 #endif 81 82 #ifndef ERF_TYPE_COLOR_HDLC_POS 83 #define ERF_TYPE_COLOR_HDLC_POS 10 84 #endif 85 86 #ifndef ERF_TYPE_COLOR_ETH 87 #define ERF_TYPE_COLOR_ETH 11 88 #endif 89 90 #ifndef ERF_TYPE_MC_AAL2 91 #define ERF_TYPE_MC_AAL2 12 92 #endif 93 94 #ifndef ERF_TYPE_IP_COUNTER 95 #define ERF_TYPE_IP_COUNTER 13 96 #endif 97 98 #ifndef ERF_TYPE_TCP_FLOW_COUNTER 99 #define ERF_TYPE_TCP_FLOW_COUNTER 14 100 #endif 101 102 #ifndef ERF_TYPE_DSM_COLOR_HDLC_POS 103 #define ERF_TYPE_DSM_COLOR_HDLC_POS 15 104 #endif 105 106 #ifndef ERF_TYPE_DSM_COLOR_ETH 107 #define ERF_TYPE_DSM_COLOR_ETH 16 108 #endif 109 110 #ifndef ERF_TYPE_COLOR_MC_HDLC_POS 111 #define ERF_TYPE_COLOR_MC_HDLC_POS 17 112 #endif 113 114 #ifndef ERF_TYPE_AAL2 115 #define ERF_TYPE_AAL2 18 116 #endif 117 118 #ifndef ERF_TYPE_COLOR_HASH_POS 119 #define ERF_TYPE_COLOR_HASH_POS 19 120 #endif 121 122 #ifndef ERF_TYPE_COLOR_HASH_ETH 123 #define ERF_TYPE_COLOR_HASH_ETH 20 124 #endif 125 126 #ifndef ERF_TYPE_INFINIBAND 127 #define ERF_TYPE_INFINIBAND 21 128 #endif 129 130 #ifndef ERF_TYPE_IPV4 131 #define ERF_TYPE_IPV4 22 132 #endif 133 134 #ifndef ERF_TYPE_IPV6 135 #define ERF_TYPE_IPV6 23 136 #endif 137 138 #ifndef ERF_TYPE_RAW_LINK 139 #define ERF_TYPE_RAW_LINK 24 140 #endif 141 142 #ifndef ERF_TYPE_INFINIBAND_LINK 143 #define ERF_TYPE_INFINIBAND_LINK 25 144 #endif 145 146 #ifndef ERF_TYPE_META 147 #define ERF_TYPE_META 27 148 #endif 149 150 #ifndef ERF_TYPE_PAD 151 #define ERF_TYPE_PAD 48 152 #endif 153 154 #define ATM_CELL_SIZE 52 155 #define ATM_HDR_SIZE 4 156 157 /* 158 * A header containing additional MTP information. 159 */ 160 #define MTP2_SENT_OFFSET 0 /* 1 byte */ 161 #define MTP2_ANNEX_A_USED_OFFSET 1 /* 1 byte */ 162 #define MTP2_LINK_NUMBER_OFFSET 2 /* 2 bytes */ 163 #define MTP2_HDR_LEN 4 /* length of the header */ 164 165 #define MTP2_ANNEX_A_NOT_USED 0 166 #define MTP2_ANNEX_A_USED 1 167 #define MTP2_ANNEX_A_USED_UNKNOWN 2 168 169 /* SunATM pseudo header */ 170 struct sunatm_hdr { 171 unsigned char flags; /* destination and traffic type */ 172 unsigned char vpi; /* VPI */ 173 unsigned short vci; /* VCI */ 174 }; 175 176 /* 177 * Private data for capturing on DAG devices. 178 */ 179 struct pcap_dag { 180 struct pcap_stat stat; 181 u_char *dag_mem_bottom; /* DAG card current memory bottom pointer */ 182 u_char *dag_mem_top; /* DAG card current memory top pointer */ 183 int dag_fcs_bits; /* Number of checksum bits from link layer */ 184 int dag_flags; /* Flags */ 185 int dag_stream; /* DAG stream number */ 186 int dag_timeout; /* timeout specified to pcap_open_live. 187 * Same as in linux above, introduce 188 * generally? */ 189 dag_card_ref_t dag_ref; /* DAG Configuration/Status API card reference */ 190 dag_component_t dag_root; /* DAG CSAPI Root component */ 191 attr_uuid_t drop_attr; /* DAG Stream Drop Attribute handle, if available */ 192 struct timeval required_select_timeout; 193 /* Timeout caller must use in event loops */ 194 }; 195 196 typedef struct pcap_dag_node { 197 struct pcap_dag_node *next; 198 pcap_t *p; 199 pid_t pid; 200 } pcap_dag_node_t; 201 202 static pcap_dag_node_t *pcap_dags = NULL; 203 static int atexit_handler_installed = 0; 204 static const unsigned short endian_test_word = 0x0100; 205 206 #define IS_BIGENDIAN() (*((unsigned char *)&endian_test_word)) 207 208 #define MAX_DAG_PACKET 65536 209 210 static unsigned char TempPkt[MAX_DAG_PACKET]; 211 212 #ifndef HAVE_DAG_LARGE_STREAMS_API 213 #define dag_attach_stream64(a, b, c, d) dag_attach_stream(a, b, c, d) 214 #define dag_get_stream_poll64(a, b, c, d, e) dag_get_stream_poll(a, b, c, d, e) 215 #define dag_set_stream_poll64(a, b, c, d, e) dag_set_stream_poll(a, b, c, d, e) 216 #define dag_size_t uint32_t 217 #endif 218 219 static int dag_setfilter(pcap_t *p, struct bpf_program *fp); 220 static int dag_stats(pcap_t *p, struct pcap_stat *ps); 221 static int dag_set_datalink(pcap_t *p, int dlt); 222 static int dag_get_datalink(pcap_t *p); 223 static int dag_setnonblock(pcap_t *p, int nonblock); 224 225 static void 226 delete_pcap_dag(pcap_t *p) 227 { 228 pcap_dag_node_t *curr = NULL, *prev = NULL; 229 230 for (prev = NULL, curr = pcap_dags; curr != NULL && curr->p != p; prev = curr, curr = curr->next) { 231 /* empty */ 232 } 233 234 if (curr != NULL && curr->p == p) { 235 if (prev != NULL) { 236 prev->next = curr->next; 237 } else { 238 pcap_dags = curr->next; 239 } 240 } 241 } 242 243 /* 244 * Performs a graceful shutdown of the DAG card, frees dynamic memory held 245 * in the pcap_t structure, and closes the file descriptor for the DAG card. 246 */ 247 248 static void 249 dag_platform_cleanup(pcap_t *p) 250 { 251 struct pcap_dag *pd = p->priv; 252 253 if(dag_stop_stream(p->fd, pd->dag_stream) < 0) 254 fprintf(stderr,"dag_stop_stream: %s\n", strerror(errno)); 255 256 if(dag_detach_stream(p->fd, pd->dag_stream) < 0) 257 fprintf(stderr,"dag_detach_stream: %s\n", strerror(errno)); 258 259 if(pd->dag_ref != NULL) { 260 dag_config_dispose(pd->dag_ref); 261 p->fd = -1; 262 pd->dag_ref = NULL; 263 } 264 delete_pcap_dag(p); 265 pcap_cleanup_live_common(p); 266 /* Note: don't need to call close(p->fd) or dag_close(p->fd) as dag_config_dispose(pd->dag_ref) does this. */ 267 } 268 269 static void 270 atexit_handler(void) 271 { 272 while (pcap_dags != NULL) { 273 if (pcap_dags->pid == getpid()) { 274 if (pcap_dags->p != NULL) 275 dag_platform_cleanup(pcap_dags->p); 276 } else { 277 delete_pcap_dag(pcap_dags->p); 278 } 279 } 280 } 281 282 static int 283 new_pcap_dag(pcap_t *p) 284 { 285 pcap_dag_node_t *node = NULL; 286 287 if ((node = malloc(sizeof(pcap_dag_node_t))) == NULL) { 288 return -1; 289 } 290 291 if (!atexit_handler_installed) { 292 atexit(atexit_handler); 293 atexit_handler_installed = 1; 294 } 295 296 node->next = pcap_dags; 297 node->p = p; 298 node->pid = getpid(); 299 300 pcap_dags = node; 301 302 return 0; 303 } 304 305 static unsigned int 306 dag_erf_ext_header_count(uint8_t * erf, size_t len) 307 { 308 uint32_t hdr_num = 0; 309 uint8_t hdr_type; 310 311 /* basic sanity checks */ 312 if ( erf == NULL ) 313 return 0; 314 if ( len < 16 ) 315 return 0; 316 317 /* check if we have any extension headers */ 318 if ( (erf[8] & 0x80) == 0x00 ) 319 return 0; 320 321 /* loop over the extension headers */ 322 do { 323 324 /* sanity check we have enough bytes */ 325 if ( len < (24 + (hdr_num * 8)) ) 326 return hdr_num; 327 328 /* get the header type */ 329 hdr_type = erf[(16 + (hdr_num * 8))]; 330 hdr_num++; 331 332 } while ( hdr_type & 0x80 ); 333 334 return hdr_num; 335 } 336 337 /* 338 * Read at most max_packets from the capture stream and call the callback 339 * for each of them. Returns the number of packets handled, -1 if an 340 * error occured, or -2 if we were told to break out of the loop. 341 */ 342 static int 343 dag_read(pcap_t *p, int cnt, pcap_handler callback, u_char *user) 344 { 345 struct pcap_dag *pd = p->priv; 346 unsigned int processed = 0; 347 unsigned int nonblocking = pd->dag_flags & DAGF_NONBLOCK; 348 unsigned int num_ext_hdr = 0; 349 unsigned int ticks_per_second; 350 351 /* Get the next bufferful of packets (if necessary). */ 352 while (pd->dag_mem_top - pd->dag_mem_bottom < dag_record_size) { 353 354 /* 355 * Has "pcap_breakloop()" been called? 356 */ 357 if (p->break_loop) { 358 /* 359 * Yes - clear the flag that indicates that 360 * it has, and return -2 to indicate that 361 * we were told to break out of the loop. 362 */ 363 p->break_loop = 0; 364 return -2; 365 } 366 367 /* dag_advance_stream() will block (unless nonblock is called) 368 * until 64kB of data has accumulated. 369 * If to_ms is set, it will timeout before 64kB has accumulated. 370 * We wait for 64kB because processing a few packets at a time 371 * can cause problems at high packet rates (>200kpps) due 372 * to inefficiencies. 373 * This does mean if to_ms is not specified the capture may 'hang' 374 * for long periods if the data rate is extremely slow (<64kB/sec) 375 * If non-block is specified it will return immediately. The user 376 * is then responsible for efficiency. 377 */ 378 if ( NULL == (pd->dag_mem_top = dag_advance_stream(p->fd, pd->dag_stream, &(pd->dag_mem_bottom))) ) { 379 return -1; 380 } 381 382 if (nonblocking && (pd->dag_mem_top - pd->dag_mem_bottom < dag_record_size)) 383 { 384 /* Pcap is configured to process only available packets, and there aren't any, return immediately. */ 385 return 0; 386 } 387 388 if(!nonblocking && 389 pd->dag_timeout && 390 (pd->dag_mem_top - pd->dag_mem_bottom < dag_record_size)) 391 { 392 /* Blocking mode, but timeout set and no data has arrived, return anyway.*/ 393 return 0; 394 } 395 396 } 397 398 /* Process the packets. */ 399 while (pd->dag_mem_top - pd->dag_mem_bottom >= dag_record_size) { 400 401 unsigned short packet_len = 0; 402 int caplen = 0; 403 struct pcap_pkthdr pcap_header; 404 405 dag_record_t *header = (dag_record_t *)(pd->dag_mem_bottom); 406 407 u_char *dp = ((u_char *)header); /* + dag_record_size; */ 408 unsigned short rlen; 409 410 /* 411 * Has "pcap_breakloop()" been called? 412 */ 413 if (p->break_loop) { 414 /* 415 * Yes - clear the flag that indicates that 416 * it has, and return -2 to indicate that 417 * we were told to break out of the loop. 418 */ 419 p->break_loop = 0; 420 return -2; 421 } 422 423 rlen = ntohs(header->rlen); 424 if (rlen < dag_record_size) 425 { 426 strncpy(p->errbuf, "dag_read: record too small", PCAP_ERRBUF_SIZE); 427 return -1; 428 } 429 pd->dag_mem_bottom += rlen; 430 431 /* Count lost packets. */ 432 switch((header->type & 0x7f)) { 433 /* in these types the color value overwrites the lctr */ 434 case ERF_TYPE_COLOR_HDLC_POS: 435 case ERF_TYPE_COLOR_ETH: 436 case ERF_TYPE_DSM_COLOR_HDLC_POS: 437 case ERF_TYPE_DSM_COLOR_ETH: 438 case ERF_TYPE_COLOR_MC_HDLC_POS: 439 case ERF_TYPE_COLOR_HASH_ETH: 440 case ERF_TYPE_COLOR_HASH_POS: 441 break; 442 443 default: 444 if ( (pd->drop_attr == kNullAttributeUuid) && (header->lctr) ) { 445 pd->stat.ps_drop += ntohs(header->lctr); 446 } 447 } 448 449 if ((header->type & 0x7f) == ERF_TYPE_PAD) { 450 continue; 451 } 452 453 num_ext_hdr = dag_erf_ext_header_count(dp, rlen); 454 455 /* ERF encapsulation */ 456 /* The Extensible Record Format is not dropped for this kind of encapsulation, 457 * and will be handled as a pseudo header by the decoding application. 458 * The information carried in the ERF header and in the optional subheader (if present) 459 * could be merged with the libpcap information, to offer a better decoding. 460 * The packet length is 461 * o the length of the packet on the link (header->wlen), 462 * o plus the length of the ERF header (dag_record_size), as the length of the 463 * pseudo header will be adjusted during the decoding, 464 * o plus the length of the optional subheader (if present). 465 * 466 * The capture length is header.rlen and the byte stuffing for alignment will be dropped 467 * if the capture length is greater than the packet length. 468 */ 469 if (p->linktype == DLT_ERF) { 470 packet_len = ntohs(header->wlen) + dag_record_size; 471 caplen = rlen; 472 switch ((header->type & 0x7f)) { 473 case ERF_TYPE_MC_AAL5: 474 case ERF_TYPE_MC_ATM: 475 case ERF_TYPE_MC_HDLC: 476 case ERF_TYPE_MC_RAW_CHANNEL: 477 case ERF_TYPE_MC_RAW: 478 case ERF_TYPE_MC_AAL2: 479 case ERF_TYPE_COLOR_MC_HDLC_POS: 480 packet_len += 4; /* MC header */ 481 break; 482 483 case ERF_TYPE_COLOR_HASH_ETH: 484 case ERF_TYPE_DSM_COLOR_ETH: 485 case ERF_TYPE_COLOR_ETH: 486 case ERF_TYPE_ETH: 487 packet_len += 2; /* ETH header */ 488 break; 489 } /* switch type */ 490 491 /* Include ERF extension headers */ 492 packet_len += (8 * num_ext_hdr); 493 494 if (caplen > packet_len) { 495 caplen = packet_len; 496 } 497 } else { 498 /* Other kind of encapsulation according to the header Type */ 499 500 /* Skip over generic ERF header */ 501 dp += dag_record_size; 502 /* Skip over extension headers */ 503 dp += 8 * num_ext_hdr; 504 505 switch((header->type & 0x7f)) { 506 case ERF_TYPE_ATM: 507 case ERF_TYPE_AAL5: 508 if ((header->type & 0x7f) == ERF_TYPE_AAL5) { 509 packet_len = ntohs(header->wlen); 510 caplen = rlen - dag_record_size; 511 } 512 case ERF_TYPE_MC_ATM: 513 if ((header->type & 0x7f) == ERF_TYPE_MC_ATM) { 514 caplen = packet_len = ATM_CELL_SIZE; 515 dp+=4; 516 } 517 case ERF_TYPE_MC_AAL5: 518 if ((header->type & 0x7f) == ERF_TYPE_MC_AAL5) { 519 packet_len = ntohs(header->wlen); 520 caplen = rlen - dag_record_size - 4; 521 dp+=4; 522 } 523 /* Skip over extension headers */ 524 caplen -= (8 * num_ext_hdr); 525 526 if ((header->type & 0x7f) == ERF_TYPE_ATM) { 527 caplen = packet_len = ATM_CELL_SIZE; 528 } 529 if (p->linktype == DLT_SUNATM) { 530 struct sunatm_hdr *sunatm = (struct sunatm_hdr *)dp; 531 unsigned long rawatm; 532 533 rawatm = ntohl(*((unsigned long *)dp)); 534 sunatm->vci = htons((rawatm >> 4) & 0xffff); 535 sunatm->vpi = (rawatm >> 20) & 0x00ff; 536 sunatm->flags = ((header->flags.iface & 1) ? 0x80 : 0x00) | 537 ((sunatm->vpi == 0 && sunatm->vci == htons(5)) ? 6 : 538 ((sunatm->vpi == 0 && sunatm->vci == htons(16)) ? 5 : 539 ((dp[ATM_HDR_SIZE] == 0xaa && 540 dp[ATM_HDR_SIZE+1] == 0xaa && 541 dp[ATM_HDR_SIZE+2] == 0x03) ? 2 : 1))); 542 543 } else if (p->linktype == DLT_ATM_RFC1483) { 544 packet_len -= ATM_HDR_SIZE; 545 caplen -= ATM_HDR_SIZE; 546 dp += ATM_HDR_SIZE; 547 } else 548 continue; 549 break; 550 551 case ERF_TYPE_COLOR_HASH_ETH: 552 case ERF_TYPE_DSM_COLOR_ETH: 553 case ERF_TYPE_COLOR_ETH: 554 case ERF_TYPE_ETH: 555 if ((p->linktype != DLT_EN10MB) && 556 (p->linktype != DLT_DOCSIS)) 557 continue; 558 packet_len = ntohs(header->wlen); 559 packet_len -= (pd->dag_fcs_bits >> 3); 560 caplen = rlen - dag_record_size - 2; 561 /* Skip over extension headers */ 562 caplen -= (8 * num_ext_hdr); 563 if (caplen > packet_len) { 564 caplen = packet_len; 565 } 566 dp += 2; 567 break; 568 569 case ERF_TYPE_COLOR_HASH_POS: 570 case ERF_TYPE_DSM_COLOR_HDLC_POS: 571 case ERF_TYPE_COLOR_HDLC_POS: 572 case ERF_TYPE_HDLC_POS: 573 if ((p->linktype != DLT_CHDLC) && 574 (p->linktype != DLT_PPP_SERIAL) && 575 (p->linktype != DLT_FRELAY)) 576 continue; 577 packet_len = ntohs(header->wlen); 578 packet_len -= (pd->dag_fcs_bits >> 3); 579 caplen = rlen - dag_record_size; 580 /* Skip over extension headers */ 581 caplen -= (8 * num_ext_hdr); 582 if (caplen > packet_len) { 583 caplen = packet_len; 584 } 585 break; 586 587 case ERF_TYPE_COLOR_MC_HDLC_POS: 588 case ERF_TYPE_MC_HDLC: 589 if ((p->linktype != DLT_CHDLC) && 590 (p->linktype != DLT_PPP_SERIAL) && 591 (p->linktype != DLT_FRELAY) && 592 (p->linktype != DLT_MTP2) && 593 (p->linktype != DLT_MTP2_WITH_PHDR) && 594 (p->linktype != DLT_LAPD)) 595 continue; 596 packet_len = ntohs(header->wlen); 597 packet_len -= (pd->dag_fcs_bits >> 3); 598 caplen = rlen - dag_record_size - 4; 599 /* Skip over extension headers */ 600 caplen -= (8 * num_ext_hdr); 601 if (caplen > packet_len) { 602 caplen = packet_len; 603 } 604 /* jump the MC_HDLC_HEADER */ 605 dp += 4; 606 #ifdef DLT_MTP2_WITH_PHDR 607 if (p->linktype == DLT_MTP2_WITH_PHDR) { 608 /* Add the MTP2 Pseudo Header */ 609 caplen += MTP2_HDR_LEN; 610 packet_len += MTP2_HDR_LEN; 611 612 TempPkt[MTP2_SENT_OFFSET] = 0; 613 TempPkt[MTP2_ANNEX_A_USED_OFFSET] = MTP2_ANNEX_A_USED_UNKNOWN; 614 *(TempPkt+MTP2_LINK_NUMBER_OFFSET) = ((header->rec.mc_hdlc.mc_header>>16)&0x01); 615 *(TempPkt+MTP2_LINK_NUMBER_OFFSET+1) = ((header->rec.mc_hdlc.mc_header>>24)&0xff); 616 memcpy(TempPkt+MTP2_HDR_LEN, dp, caplen); 617 dp = TempPkt; 618 } 619 #endif 620 break; 621 622 case ERF_TYPE_IPV4: 623 if ((p->linktype != DLT_RAW) && 624 (p->linktype != DLT_IPV4)) 625 continue; 626 packet_len = ntohs(header->wlen); 627 caplen = rlen - dag_record_size; 628 /* Skip over extension headers */ 629 caplen -= (8 * num_ext_hdr); 630 if (caplen > packet_len) { 631 caplen = packet_len; 632 } 633 break; 634 635 case ERF_TYPE_IPV6: 636 if ((p->linktype != DLT_RAW) && 637 (p->linktype != DLT_IPV6)) 638 continue; 639 packet_len = ntohs(header->wlen); 640 caplen = rlen - dag_record_size; 641 /* Skip over extension headers */ 642 caplen -= (8 * num_ext_hdr); 643 if (caplen > packet_len) { 644 caplen = packet_len; 645 } 646 break; 647 648 /* These types have no matching 'native' DLT, but can be used with DLT_ERF above */ 649 case ERF_TYPE_MC_RAW: 650 case ERF_TYPE_MC_RAW_CHANNEL: 651 case ERF_TYPE_IP_COUNTER: 652 case ERF_TYPE_TCP_FLOW_COUNTER: 653 case ERF_TYPE_INFINIBAND: 654 case ERF_TYPE_RAW_LINK: 655 case ERF_TYPE_INFINIBAND_LINK: 656 default: 657 /* Unhandled ERF type. 658 * Ignore rather than generating error 659 */ 660 continue; 661 } /* switch type */ 662 663 } /* ERF encapsulation */ 664 665 if (caplen > p->snapshot) 666 caplen = p->snapshot; 667 668 /* Run the packet filter if there is one. */ 669 if ((p->fcode.bf_insns == NULL) || bpf_filter(p->fcode.bf_insns, dp, packet_len, caplen)) { 670 671 /* convert between timestamp formats */ 672 register unsigned long long ts; 673 674 if (IS_BIGENDIAN()) { 675 ts = SWAPLL(header->ts); 676 } else { 677 ts = header->ts; 678 } 679 680 switch (p->opt.tstamp_precision) { 681 case PCAP_TSTAMP_PRECISION_NANO: 682 ticks_per_second = 1000000000; 683 break; 684 case PCAP_TSTAMP_PRECISION_MICRO: 685 default: 686 ticks_per_second = 1000000; 687 break; 688 689 } 690 pcap_header.ts.tv_sec = ts >> 32; 691 ts = (ts & 0xffffffffULL) * ticks_per_second; 692 ts += 0x80000000; /* rounding */ 693 pcap_header.ts.tv_usec = ts >> 32; 694 if (pcap_header.ts.tv_usec >= ticks_per_second) { 695 pcap_header.ts.tv_usec -= ticks_per_second; 696 pcap_header.ts.tv_sec++; 697 } 698 699 /* Fill in our own header data */ 700 pcap_header.caplen = caplen; 701 pcap_header.len = packet_len; 702 703 /* Count the packet. */ 704 pd->stat.ps_recv++; 705 706 /* Call the user supplied callback function */ 707 callback(user, &pcap_header, dp); 708 709 /* Only count packets that pass the filter, for consistency with standard Linux behaviour. */ 710 processed++; 711 if (processed == cnt && !PACKET_COUNT_IS_UNLIMITED(cnt)) 712 { 713 /* Reached the user-specified limit. */ 714 return cnt; 715 } 716 } 717 } 718 719 return processed; 720 } 721 722 static int 723 dag_inject(pcap_t *p, const void *buf _U_, size_t size _U_) 724 { 725 strlcpy(p->errbuf, "Sending packets isn't supported on DAG cards", 726 PCAP_ERRBUF_SIZE); 727 return (-1); 728 } 729 730 /* 731 * Get a handle for a live capture from the given DAG device. Passing a NULL 732 * device will result in a failure. The promisc flag is ignored because DAG 733 * cards are always promiscuous. The to_ms parameter is used in setting the 734 * API polling parameters. 735 * 736 * snaplen is now also ignored, until we get per-stream slen support. Set 737 * slen with approprite DAG tool BEFORE pcap_activate(). 738 * 739 * See also pcap(3). 740 */ 741 static int dag_activate(pcap_t* p) 742 { 743 struct pcap_dag *pd = p->priv; 744 char *s; 745 int n; 746 daginf_t* daginf; 747 char * newDev = NULL; 748 char * device = p->opt.device; 749 dag_size_t mindata; 750 struct timeval maxwait; 751 struct timeval poll; 752 753 if (device == NULL) { 754 pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "device is NULL"); 755 return -1; 756 } 757 758 /* Initialize some components of the pcap structure. */ 759 newDev = (char *)malloc(strlen(device) + 16); 760 if (newDev == NULL) { 761 pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE, 762 errno, "Can't allocate string for device name"); 763 goto fail; 764 } 765 766 /* Parse input name to get dag device and stream number if provided */ 767 if (dag_parse_name(device, newDev, strlen(device) + 16, &pd->dag_stream) < 0) { 768 pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE, 769 errno, "dag_parse_name"); 770 goto fail; 771 } 772 device = newDev; 773 774 if (pd->dag_stream%2) { 775 pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "dag_parse_name: tx (even numbered) streams not supported for capture"); 776 goto fail; 777 } 778 779 /* setup device parameters */ 780 if((pd->dag_ref = dag_config_init((char *)device)) == NULL) { 781 pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE, 782 errno, "dag_config_init %s", device); 783 goto fail; 784 } 785 786 if((p->fd = dag_config_get_card_fd(pd->dag_ref)) < 0) { 787 pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE, 788 errno, "dag_config_get_card_fd %s", device); 789 goto fail; 790 } 791 792 /* Open requested stream. Can fail if already locked or on error */ 793 if (dag_attach_stream64(p->fd, pd->dag_stream, 0, 0) < 0) { 794 pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE, 795 errno, "dag_attach_stream"); 796 goto failclose; 797 } 798 799 /* Try to find Stream Drop attribute */ 800 pd->drop_attr = kNullAttributeUuid; 801 pd->dag_root = dag_config_get_root_component(pd->dag_ref); 802 if ( dag_component_get_subcomponent(pd->dag_root, kComponentStreamFeatures, 0) ) 803 { 804 pd->drop_attr = dag_config_get_indexed_attribute_uuid(pd->dag_ref, kUint32AttributeStreamDropCount, pd->dag_stream/2); 805 } 806 807 /* Set up default poll parameters for stream 808 * Can be overridden by pcap_set_nonblock() 809 */ 810 if (dag_get_stream_poll64(p->fd, pd->dag_stream, 811 &mindata, &maxwait, &poll) < 0) { 812 pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE, 813 errno, "dag_get_stream_poll"); 814 goto faildetach; 815 } 816 817 /* Use the poll time as the required select timeout for callers 818 * who are using select()/etc. in an event loop waiting for 819 * packets to arrive. 820 */ 821 pd->required_select_timeout = poll; 822 p->required_select_timeout = &pd->required_select_timeout; 823 824 /* 825 * Turn a negative snapshot value (invalid), a snapshot value of 826 * 0 (unspecified), or a value bigger than the normal maximum 827 * value, into the maximum allowed value. 828 * 829 * If some application really *needs* a bigger snapshot 830 * length, we should just increase MAXIMUM_SNAPLEN. 831 */ 832 if (p->snapshot <= 0 || p->snapshot > MAXIMUM_SNAPLEN) 833 p->snapshot = MAXIMUM_SNAPLEN; 834 835 if (p->opt.immediate) { 836 /* Call callback immediately. 837 * XXX - is this the right way to p this? 838 */ 839 mindata = 0; 840 } else { 841 /* Amount of data to collect in Bytes before calling callbacks. 842 * Important for efficiency, but can introduce latency 843 * at low packet rates if to_ms not set! 844 */ 845 mindata = 65536; 846 } 847 848 /* Obey opt.timeout (was to_ms) if supplied. This is a good idea! 849 * Recommend 10-100ms. Calls will time out even if no data arrived. 850 */ 851 maxwait.tv_sec = p->opt.timeout/1000; 852 maxwait.tv_usec = (p->opt.timeout%1000) * 1000; 853 854 if (dag_set_stream_poll64(p->fd, pd->dag_stream, 855 mindata, &maxwait, &poll) < 0) { 856 pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE, 857 errno, "dag_set_stream_poll"); 858 goto faildetach; 859 } 860 861 /* XXX Not calling dag_configure() to set slen; this is unsafe in 862 * multi-stream environments as the gpp config is global. 863 * Once the firmware provides 'per-stream slen' this can be supported 864 * again via the Config API without side-effects */ 865 #if 0 866 /* set the card snap length to the specified snaplen parameter */ 867 /* This is a really bad idea, as different cards have different 868 * valid slen ranges. Should fix in Config API. */ 869 if (p->snapshot == 0 || p->snapshot > MAX_DAG_SNAPLEN) { 870 p->snapshot = MAX_DAG_SNAPLEN; 871 } else if (snaplen < MIN_DAG_SNAPLEN) { 872 p->snapshot = MIN_DAG_SNAPLEN; 873 } 874 /* snap len has to be a multiple of 4 */ 875 #endif 876 877 if(dag_start_stream(p->fd, pd->dag_stream) < 0) { 878 pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE, 879 errno, "dag_start_stream %s", device); 880 goto faildetach; 881 } 882 883 /* 884 * Important! You have to ensure bottom is properly 885 * initialized to zero on startup, it won't give you 886 * a compiler warning if you make this mistake! 887 */ 888 pd->dag_mem_bottom = 0; 889 pd->dag_mem_top = 0; 890 891 /* 892 * Find out how many FCS bits we should strip. 893 * First, query the card to see if it strips the FCS. 894 */ 895 daginf = dag_info(p->fd); 896 if ((0x4200 == daginf->device_code) || (0x4230 == daginf->device_code)) { 897 /* DAG 4.2S and 4.23S already strip the FCS. Stripping the final word again truncates the packet. */ 898 pd->dag_fcs_bits = 0; 899 900 /* Note that no FCS will be supplied. */ 901 p->linktype_ext = LT_FCS_DATALINK_EXT(0); 902 } else { 903 /* 904 * Start out assuming it's 32 bits. 905 */ 906 pd->dag_fcs_bits = 32; 907 908 /* Allow an environment variable to override. */ 909 if ((s = getenv("ERF_FCS_BITS")) != NULL) { 910 if ((n = atoi(s)) == 0 || n == 16 || n == 32) { 911 pd->dag_fcs_bits = n; 912 } else { 913 pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE, 914 "pcap_activate %s: bad ERF_FCS_BITS value (%d) in environment", device, n); 915 goto failstop; 916 } 917 } 918 919 /* 920 * Did the user request that they not be stripped? 921 */ 922 if ((s = getenv("ERF_DONT_STRIP_FCS")) != NULL) { 923 /* Yes. Note the number of bytes that will be 924 supplied. */ 925 p->linktype_ext = LT_FCS_DATALINK_EXT(pd->dag_fcs_bits/16); 926 927 /* And don't strip them. */ 928 pd->dag_fcs_bits = 0; 929 } 930 } 931 932 pd->dag_timeout = p->opt.timeout; 933 934 p->linktype = -1; 935 if (dag_get_datalink(p) < 0) 936 goto failstop; 937 938 p->bufsize = 0; 939 940 if (new_pcap_dag(p) < 0) { 941 pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE, 942 errno, "new_pcap_dag %s", device); 943 goto failstop; 944 } 945 946 /* 947 * "select()" and "poll()" don't work on DAG device descriptors. 948 */ 949 p->selectable_fd = -1; 950 951 if (newDev != NULL) { 952 free((char *)newDev); 953 } 954 955 p->read_op = dag_read; 956 p->inject_op = dag_inject; 957 p->setfilter_op = dag_setfilter; 958 p->setdirection_op = NULL; /* Not implemented.*/ 959 p->set_datalink_op = dag_set_datalink; 960 p->getnonblock_op = pcap_getnonblock_fd; 961 p->setnonblock_op = dag_setnonblock; 962 p->stats_op = dag_stats; 963 p->cleanup_op = dag_platform_cleanup; 964 pd->stat.ps_drop = 0; 965 pd->stat.ps_recv = 0; 966 pd->stat.ps_ifdrop = 0; 967 return 0; 968 969 failstop: 970 if (dag_stop_stream(p->fd, pd->dag_stream) < 0) { 971 fprintf(stderr,"dag_stop_stream: %s\n", strerror(errno)); 972 } 973 974 faildetach: 975 if (dag_detach_stream(p->fd, pd->dag_stream) < 0) 976 fprintf(stderr,"dag_detach_stream: %s\n", strerror(errno)); 977 978 failclose: 979 dag_config_dispose(pd->dag_ref); 980 delete_pcap_dag(p); 981 982 fail: 983 pcap_cleanup_live_common(p); 984 if (newDev != NULL) { 985 free((char *)newDev); 986 } 987 988 return PCAP_ERROR; 989 } 990 991 pcap_t *dag_create(const char *device, char *ebuf, int *is_ours) 992 { 993 const char *cp; 994 char *cpend; 995 long devnum; 996 pcap_t *p; 997 long stream = 0; 998 999 /* Does this look like a DAG device? */ 1000 cp = strrchr(device, '/'); 1001 if (cp == NULL) 1002 cp = device; 1003 /* Does it begin with "dag"? */ 1004 if (strncmp(cp, "dag", 3) != 0) { 1005 /* Nope, doesn't begin with "dag" */ 1006 *is_ours = 0; 1007 return NULL; 1008 } 1009 /* Yes - is "dag" followed by a number from 0 to DAG_MAX_BOARDS-1 */ 1010 cp += 3; 1011 devnum = strtol(cp, &cpend, 10); 1012 if (*cpend == ':') { 1013 /* Followed by a stream number. */ 1014 stream = strtol(++cpend, &cpend, 10); 1015 } 1016 1017 if (cpend == cp || *cpend != '\0') { 1018 /* Not followed by a number. */ 1019 *is_ours = 0; 1020 return NULL; 1021 } 1022 1023 if (devnum < 0 || devnum >= DAG_MAX_BOARDS) { 1024 /* Followed by a non-valid number. */ 1025 *is_ours = 0; 1026 return NULL; 1027 } 1028 1029 if (stream <0 || stream >= DAG_STREAM_MAX) { 1030 /* Followed by a non-valid stream number. */ 1031 *is_ours = 0; 1032 return NULL; 1033 } 1034 1035 /* OK, it's probably ours. */ 1036 *is_ours = 1; 1037 1038 p = pcap_create_common(ebuf, sizeof (struct pcap_dag)); 1039 if (p == NULL) 1040 return NULL; 1041 1042 p->activate_op = dag_activate; 1043 1044 /* 1045 * We claim that we support microsecond and nanosecond time 1046 * stamps. 1047 * 1048 * XXX Our native precision is 2^-32s, but libpcap doesn't support 1049 * power of two precisions yet. We can convert to either MICRO or NANO. 1050 */ 1051 p->tstamp_precision_count = 2; 1052 p->tstamp_precision_list = malloc(2 * sizeof(u_int)); 1053 if (p->tstamp_precision_list == NULL) { 1054 pcap_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE, 1055 errno, "malloc"); 1056 pcap_close(p); 1057 return NULL; 1058 } 1059 p->tstamp_precision_list[0] = PCAP_TSTAMP_PRECISION_MICRO; 1060 p->tstamp_precision_list[1] = PCAP_TSTAMP_PRECISION_NANO; 1061 return p; 1062 } 1063 1064 static int 1065 dag_stats(pcap_t *p, struct pcap_stat *ps) { 1066 struct pcap_dag *pd = p->priv; 1067 uint32_t stream_drop; 1068 dag_err_t dag_error; 1069 1070 /* 1071 * Packet records received (ps_recv) are counted in dag_read(). 1072 * Packet records dropped (ps_drop) are read from Stream Drop attribute if present, 1073 * otherwise integrate the ERF Header lctr counts (if available) in dag_read(). 1074 * We are reporting that no records are dropped by the card/driver (ps_ifdrop). 1075 */ 1076 1077 if(pd->drop_attr != kNullAttributeUuid) { 1078 /* Note this counter is cleared at start of capture and will wrap at UINT_MAX. 1079 * The application is responsible for polling ps_drop frequently enough 1080 * to detect each wrap and integrate total drop with a wider counter */ 1081 if ((dag_error = dag_config_get_uint32_attribute_ex(pd->dag_ref, pd->drop_attr, &stream_drop) == kDagErrNone)) { 1082 pd->stat.ps_drop = stream_drop; 1083 } else { 1084 pcap_snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "reading stream drop attribute: %s", 1085 dag_config_strerror(dag_error)); 1086 return -1; 1087 } 1088 } 1089 1090 *ps = pd->stat; 1091 1092 return 0; 1093 } 1094 1095 /* 1096 * Add all DAG devices. 1097 */ 1098 int 1099 dag_findalldevs(pcap_if_list_t *devlistp, char *errbuf) 1100 { 1101 char name[12]; /* XXX - pick a size */ 1102 int c; 1103 char dagname[DAGNAME_BUFSIZE]; 1104 int dagstream; 1105 int dagfd; 1106 dag_card_inf_t *inf; 1107 char *description; 1108 int stream, rxstreams; 1109 1110 /* Try all the DAGs 0-DAG_MAX_BOARDS */ 1111 for (c = 0; c < DAG_MAX_BOARDS; c++) { 1112 pcap_snprintf(name, 12, "dag%d", c); 1113 if (-1 == dag_parse_name(name, dagname, DAGNAME_BUFSIZE, &dagstream)) 1114 { 1115 (void) pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE, 1116 "dag: device name %s can't be parsed", name); 1117 return (-1); 1118 } 1119 if ( (dagfd = dag_open(dagname)) >= 0 ) { 1120 description = NULL; 1121 if ((inf = dag_pciinfo(dagfd))) 1122 description = dag_device_name(inf->device_code, 1); 1123 /* 1124 * XXX - is there a way to determine whether 1125 * the card is plugged into a network or not? 1126 * If so, we should check that and set 1127 * PCAP_IF_CONNECTION_STATUS_CONNECTED or 1128 * PCAP_IF_CONNECTION_STATUS_DISCONNECTED. 1129 * 1130 * Also, are there notions of "up" and "running"? 1131 */ 1132 if (add_dev(devlistp, name, 0, description, errbuf) == NULL) { 1133 /* 1134 * Failure. 1135 */ 1136 return (-1); 1137 } 1138 rxstreams = dag_rx_get_stream_count(dagfd); 1139 for(stream=0;stream<DAG_STREAM_MAX;stream+=2) { 1140 if (0 == dag_attach_stream(dagfd, stream, 0, 0)) { 1141 dag_detach_stream(dagfd, stream); 1142 1143 pcap_snprintf(name, 10, "dag%d:%d", c, stream); 1144 if (add_dev(devlistp, name, 0, description, errbuf) == NULL) { 1145 /* 1146 * Failure. 1147 */ 1148 return (-1); 1149 } 1150 1151 rxstreams--; 1152 if(rxstreams <= 0) { 1153 break; 1154 } 1155 } 1156 } 1157 dag_close(dagfd); 1158 } 1159 1160 } 1161 return (0); 1162 } 1163 1164 /* 1165 * Installs the given bpf filter program in the given pcap structure. There is 1166 * no attempt to store the filter in kernel memory as that is not supported 1167 * with DAG cards. 1168 */ 1169 static int 1170 dag_setfilter(pcap_t *p, struct bpf_program *fp) 1171 { 1172 if (!p) 1173 return -1; 1174 if (!fp) { 1175 strncpy(p->errbuf, "setfilter: No filter specified", 1176 sizeof(p->errbuf)); 1177 return -1; 1178 } 1179 1180 /* Make our private copy of the filter */ 1181 1182 if (install_bpf_program(p, fp) < 0) 1183 return -1; 1184 1185 return (0); 1186 } 1187 1188 static int 1189 dag_set_datalink(pcap_t *p, int dlt) 1190 { 1191 p->linktype = dlt; 1192 1193 return (0); 1194 } 1195 1196 static int 1197 dag_setnonblock(pcap_t *p, int nonblock) 1198 { 1199 struct pcap_dag *pd = p->priv; 1200 dag_size_t mindata; 1201 struct timeval maxwait; 1202 struct timeval poll; 1203 1204 /* 1205 * Set non-blocking mode on the FD. 1206 * XXX - is that necessary? If not, don't bother calling it, 1207 * and have a "dag_getnonblock()" function that looks at 1208 * "pd->dag_flags". 1209 */ 1210 if (pcap_setnonblock_fd(p, nonblock) < 0) 1211 return (-1); 1212 1213 if (dag_get_stream_poll64(p->fd, pd->dag_stream, 1214 &mindata, &maxwait, &poll) < 0) { 1215 pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE, 1216 errno, "dag_get_stream_poll"); 1217 return -1; 1218 } 1219 1220 /* Amount of data to collect in Bytes before calling callbacks. 1221 * Important for efficiency, but can introduce latency 1222 * at low packet rates if to_ms not set! 1223 */ 1224 if(nonblock) 1225 mindata = 0; 1226 else 1227 mindata = 65536; 1228 1229 if (dag_set_stream_poll64(p->fd, pd->dag_stream, 1230 mindata, &maxwait, &poll) < 0) { 1231 pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE, 1232 errno, "dag_set_stream_poll"); 1233 return -1; 1234 } 1235 1236 if (nonblock) { 1237 pd->dag_flags |= DAGF_NONBLOCK; 1238 } else { 1239 pd->dag_flags &= ~DAGF_NONBLOCK; 1240 } 1241 return (0); 1242 } 1243 1244 static int 1245 dag_get_datalink(pcap_t *p) 1246 { 1247 struct pcap_dag *pd = p->priv; 1248 int index=0, dlt_index=0; 1249 uint8_t types[255]; 1250 1251 memset(types, 0, 255); 1252 1253 if (p->dlt_list == NULL && (p->dlt_list = malloc(255*sizeof(*(p->dlt_list)))) == NULL) { 1254 pcap_fmt_errmsg_for_errno(p->errbuf, sizeof(p->errbuf), 1255 errno, "malloc"); 1256 return (-1); 1257 } 1258 1259 p->linktype = 0; 1260 1261 #ifdef HAVE_DAG_GET_STREAM_ERF_TYPES 1262 /* Get list of possible ERF types for this card */ 1263 if (dag_get_stream_erf_types(p->fd, pd->dag_stream, types, 255) < 0) { 1264 pcap_fmt_errmsg_for_errno(p->errbuf, sizeof(p->errbuf), 1265 errno, "dag_get_stream_erf_types"); 1266 return (-1); 1267 } 1268 1269 while (types[index]) { 1270 1271 #elif defined HAVE_DAG_GET_ERF_TYPES 1272 /* Get list of possible ERF types for this card */ 1273 if (dag_get_erf_types(p->fd, types, 255) < 0) { 1274 pcap_fmt_errmsg_for_errno(p->errbuf, sizeof(p->errbuf), 1275 errno, "dag_get_erf_types"); 1276 return (-1); 1277 } 1278 1279 while (types[index]) { 1280 #else 1281 /* Check the type through a dagapi call. */ 1282 types[index] = dag_linktype(p->fd); 1283 1284 { 1285 #endif 1286 switch((types[index] & 0x7f)) { 1287 1288 case ERF_TYPE_HDLC_POS: 1289 case ERF_TYPE_COLOR_HDLC_POS: 1290 case ERF_TYPE_DSM_COLOR_HDLC_POS: 1291 case ERF_TYPE_COLOR_HASH_POS: 1292 1293 if (p->dlt_list != NULL) { 1294 p->dlt_list[dlt_index++] = DLT_CHDLC; 1295 p->dlt_list[dlt_index++] = DLT_PPP_SERIAL; 1296 p->dlt_list[dlt_index++] = DLT_FRELAY; 1297 } 1298 if(!p->linktype) 1299 p->linktype = DLT_CHDLC; 1300 break; 1301 1302 case ERF_TYPE_ETH: 1303 case ERF_TYPE_COLOR_ETH: 1304 case ERF_TYPE_DSM_COLOR_ETH: 1305 case ERF_TYPE_COLOR_HASH_ETH: 1306 /* 1307 * This is (presumably) a real Ethernet capture; give it a 1308 * link-layer-type list with DLT_EN10MB and DLT_DOCSIS, so 1309 * that an application can let you choose it, in case you're 1310 * capturing DOCSIS traffic that a Cisco Cable Modem 1311 * Termination System is putting out onto an Ethernet (it 1312 * doesn't put an Ethernet header onto the wire, it puts raw 1313 * DOCSIS frames out on the wire inside the low-level 1314 * Ethernet framing). 1315 */ 1316 if (p->dlt_list != NULL) { 1317 p->dlt_list[dlt_index++] = DLT_EN10MB; 1318 p->dlt_list[dlt_index++] = DLT_DOCSIS; 1319 } 1320 if(!p->linktype) 1321 p->linktype = DLT_EN10MB; 1322 break; 1323 1324 case ERF_TYPE_ATM: 1325 case ERF_TYPE_AAL5: 1326 case ERF_TYPE_MC_ATM: 1327 case ERF_TYPE_MC_AAL5: 1328 if (p->dlt_list != NULL) { 1329 p->dlt_list[dlt_index++] = DLT_ATM_RFC1483; 1330 p->dlt_list[dlt_index++] = DLT_SUNATM; 1331 } 1332 if(!p->linktype) 1333 p->linktype = DLT_ATM_RFC1483; 1334 break; 1335 1336 case ERF_TYPE_COLOR_MC_HDLC_POS: 1337 case ERF_TYPE_MC_HDLC: 1338 if (p->dlt_list != NULL) { 1339 p->dlt_list[dlt_index++] = DLT_CHDLC; 1340 p->dlt_list[dlt_index++] = DLT_PPP_SERIAL; 1341 p->dlt_list[dlt_index++] = DLT_FRELAY; 1342 p->dlt_list[dlt_index++] = DLT_MTP2; 1343 p->dlt_list[dlt_index++] = DLT_MTP2_WITH_PHDR; 1344 p->dlt_list[dlt_index++] = DLT_LAPD; 1345 } 1346 if(!p->linktype) 1347 p->linktype = DLT_CHDLC; 1348 break; 1349 1350 case ERF_TYPE_IPV4: 1351 if (p->dlt_list != NULL) { 1352 p->dlt_list[dlt_index++] = DLT_RAW; 1353 p->dlt_list[dlt_index++] = DLT_IPV4; 1354 } 1355 if(!p->linktype) 1356 p->linktype = DLT_RAW; 1357 break; 1358 1359 case ERF_TYPE_IPV6: 1360 if (p->dlt_list != NULL) { 1361 p->dlt_list[dlt_index++] = DLT_RAW; 1362 p->dlt_list[dlt_index++] = DLT_IPV6; 1363 } 1364 if(!p->linktype) 1365 p->linktype = DLT_RAW; 1366 break; 1367 1368 case ERF_TYPE_LEGACY: 1369 case ERF_TYPE_MC_RAW: 1370 case ERF_TYPE_MC_RAW_CHANNEL: 1371 case ERF_TYPE_IP_COUNTER: 1372 case ERF_TYPE_TCP_FLOW_COUNTER: 1373 case ERF_TYPE_INFINIBAND: 1374 case ERF_TYPE_RAW_LINK: 1375 case ERF_TYPE_INFINIBAND_LINK: 1376 case ERF_TYPE_META: 1377 default: 1378 /* Libpcap cannot deal with these types yet */ 1379 /* Add no 'native' DLTs, but still covered by DLT_ERF */ 1380 break; 1381 1382 } /* switch */ 1383 index++; 1384 } 1385 1386 p->dlt_list[dlt_index++] = DLT_ERF; 1387 1388 p->dlt_count = dlt_index; 1389 1390 if(!p->linktype) 1391 p->linktype = DLT_ERF; 1392 1393 return p->linktype; 1394 } 1395 1396 #ifdef DAG_ONLY 1397 /* 1398 * This libpcap build supports only DAG cards, not regular network 1399 * interfaces. 1400 */ 1401 1402 /* 1403 * There are no regular interfaces, just DAG interfaces. 1404 */ 1405 int 1406 pcap_platform_finddevs(pcap_if_list_t *devlistp _U_, char *errbuf) 1407 { 1408 return (0); 1409 } 1410 1411 /* 1412 * Attempts to open a regular interface fail. 1413 */ 1414 pcap_t * 1415 pcap_create_interface(const char *device, char *errbuf) 1416 { 1417 pcap_snprintf(errbuf, PCAP_ERRBUF_SIZE, 1418 "This version of libpcap only supports DAG cards"); 1419 return NULL; 1420 } 1421 1422 /* 1423 * Libpcap version string. 1424 */ 1425 const char * 1426 pcap_lib_version(void) 1427 { 1428 return (PCAP_VERSION_STRING " (DAG-only)"); 1429 } 1430 #endif 1431