Annotation of embedaddon/libnet/src/libnet_build_ospf.c, revision 1.1
1.1 ! misho 1: /*
! 2: * $Id: libnet_build_ospf.c,v 1.10 2004/03/01 20:26:12 mike Exp $
! 3: *
! 4: * libnet
! 5: * libnet_build_ospf.c - OSPF packet assembler
! 6: *
! 7: * Copyright (c) 1998 - 2004 Mike D. Schiffman <mike@infonexus.com>
! 8: * All rights reserved.
! 9: *
! 10: * Copyright (c) 1999, 2000 Andrew Reiter <areiter@bindview.com>
! 11: * Bindview Development
! 12: *
! 13: * Redistribution and use in source and binary forms, with or without
! 14: * modification, are permitted provided that the following conditions
! 15: * are met:
! 16: * 1. Redistributions of source code must retain the above copyright
! 17: * notice, this list of conditions and the following disclaimer.
! 18: * 2. Redistributions in binary form must reproduce the above copyright
! 19: * notice, this list of conditions and the following disclaimer in the
! 20: * documentation and/or other materials provided with the distribution.
! 21: *
! 22: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
! 23: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 24: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 25: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
! 26: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 27: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 28: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 29: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 30: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 31: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 32: * SUCH DAMAGE.
! 33: *
! 34: */
! 35:
! 36: #if (HAVE_CONFIG_H)
! 37: #include "../include/config.h"
! 38: #endif
! 39: #if (!(_WIN32) || (__CYGWIN__))
! 40: #include "../include/libnet.h"
! 41: #else
! 42: #include "../include/win32/libnet.h"
! 43: #endif
! 44:
! 45: libnet_ptag_t
! 46: libnet_build_ospfv2(u_int16_t len, u_int8_t type, u_int32_t rtr_id,
! 47: u_int32_t area_id, u_int16_t sum, u_int16_t autype, u_int8_t *payload,
! 48: u_int32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
! 49: {
! 50: u_int32_t n, h;
! 51: libnet_pblock_t *p;
! 52: struct libnet_ospf_hdr ospf_hdr;
! 53:
! 54: if (l == NULL)
! 55: {
! 56: return (-1);
! 57: }
! 58:
! 59: n = LIBNET_OSPF_H + payload_s;
! 60: h = LIBNET_OSPF_H + payload_s + len;
! 61:
! 62: /*
! 63: * Find the existing protocol block if a ptag is specified, or create
! 64: * a new one.
! 65: */
! 66: p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_OSPF_H);
! 67: if (p == NULL)
! 68: {
! 69: return (-1);
! 70: }
! 71:
! 72: memset(&ospf_hdr, 0, sizeof(ospf_hdr));
! 73: ospf_hdr.ospf_v = 2; /* OSPF version 2 */
! 74: ospf_hdr.ospf_type = type; /* Type of pkt */
! 75: ospf_hdr.ospf_len = htons(h); /* Pkt len */
! 76: ospf_hdr.ospf_rtr_id.s_addr = htonl(rtr_id); /* Router ID */
! 77: ospf_hdr.ospf_area_id.s_addr = htonl(area_id); /* Area ID */
! 78: ospf_hdr.ospf_sum = (sum ? htons(sum) : 0);
! 79: ospf_hdr.ospf_auth_type = htons(autype); /* Type of auth */
! 80:
! 81: n = libnet_pblock_append(l, p, (u_int8_t *)&ospf_hdr, LIBNET_OSPF_H);
! 82: if (n == -1)
! 83: {
! 84: goto bad;
! 85: }
! 86:
! 87: if ((payload && !payload_s) || (!payload && payload_s))
! 88: {
! 89: snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
! 90: "%s(): payload inconsistency\n", __func__);
! 91: goto bad;
! 92: }
! 93:
! 94: if (payload && payload_s)
! 95: {
! 96: n = libnet_pblock_append(l, p, payload, payload_s);
! 97: if (n == -1)
! 98: {
! 99: goto bad;
! 100: }
! 101: }
! 102:
! 103: if (sum == 0)
! 104: {
! 105: /*
! 106: * If checksum is zero, by default libnet will compute a checksum
! 107: * for the user. The programmer can override this by calling
! 108: * libnet_toggle_checksum(l, ptag, 1);
! 109: */
! 110: libnet_pblock_setflags(p, LIBNET_PBLOCK_DO_CHECKSUM);
! 111: }
! 112: return (ptag ? ptag : libnet_pblock_update(l, p, h, LIBNET_PBLOCK_OSPF_H));
! 113: bad:
! 114: libnet_pblock_delete(l, p);
! 115: return (-1);
! 116: }
! 117:
! 118:
! 119: libnet_ptag_t
! 120: libnet_build_ospfv2_hello(u_int32_t netmask, u_int16_t interval, u_int8_t opts,
! 121: u_int8_t priority, u_int32_t dead_int, u_int32_t des_rtr, u_int32_t bkup_rtr,
! 122: u_int32_t neighbor, u_int8_t *payload, u_int32_t payload_s, libnet_t *l,
! 123: libnet_ptag_t ptag)
! 124: {
! 125: u_int32_t n, h;
! 126: libnet_pblock_t *p;
! 127: struct libnet_ospf_hello_hdr hello_hdr;
! 128:
! 129: if (l == NULL)
! 130: {
! 131: return (-1);
! 132: }
! 133:
! 134: n = LIBNET_OSPF_HELLO_H + payload_s;
! 135: h = 0;
! 136:
! 137: /*
! 138: * Find the existing protocol block if a ptag is specified, or create
! 139: * a new one.
! 140: */
! 141: p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_OSPF_HELLO_H);
! 142: if (p == NULL)
! 143: {
! 144: return (-1);
! 145: }
! 146:
! 147: memset(&hello_hdr, 0, sizeof(hello_hdr));
! 148: hello_hdr.hello_nmask.s_addr = htonl(netmask); /* Netmask */
! 149: hello_hdr.hello_intrvl = htons(interval); /* # seconds since last packet sent */
! 150: hello_hdr.hello_opts = opts; /* OSPF_* options */
! 151: hello_hdr.hello_rtr_pri = priority; /* If 0, can't be backup */
! 152: hello_hdr.hello_dead_intvl = htonl(dead_int); /* Time til router is deemed down */
! 153: hello_hdr.hello_des_rtr.s_addr = htonl(des_rtr); /* Networks designated router */
! 154: hello_hdr.hello_bkup_rtr.s_addr = htonl(bkup_rtr); /* Networks backup router */
! 155: hello_hdr.hello_nbr.s_addr = htonl(neighbor);
! 156:
! 157: n = libnet_pblock_append(l, p, (u_int8_t *)&hello_hdr, LIBNET_OSPF_HELLO_H);
! 158: if (n == -1)
! 159: {
! 160: goto bad;
! 161: }
! 162:
! 163: if ((payload && !payload_s) || (!payload && payload_s))
! 164: {
! 165: snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
! 166: "%s(): payload inconsistency\n", __func__);
! 167: goto bad;
! 168: }
! 169:
! 170: if (payload && payload_s)
! 171: {
! 172: n = libnet_pblock_append(l, p, payload, payload_s);
! 173: if (n == -1)
! 174: {
! 175: goto bad;
! 176: }
! 177: }
! 178:
! 179: return (ptag ? ptag : libnet_pblock_update(l, p, h,
! 180: LIBNET_PBLOCK_OSPF_HELLO_H));
! 181: bad:
! 182: libnet_pblock_delete(l, p);
! 183: return (-1);
! 184: }
! 185:
! 186:
! 187: libnet_ptag_t
! 188: libnet_build_ospfv2_dbd(u_int16_t dgram_len, u_int8_t opts, u_int8_t type,
! 189: u_int32_t seqnum, u_int8_t *payload, u_int32_t payload_s, libnet_t *l,
! 190: libnet_ptag_t ptag)
! 191: {
! 192: u_int32_t n, h;
! 193: libnet_pblock_t *p;
! 194: struct libnet_dbd_hdr dbd_hdr;
! 195:
! 196: if (l == NULL)
! 197: {
! 198: return (-1);
! 199: }
! 200:
! 201: n = LIBNET_OSPF_DBD_H + payload_s;
! 202: h = 0;
! 203:
! 204: /*
! 205: * Find the existing protocol block if a ptag is specified, or create
! 206: * a new one.
! 207: */
! 208: p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_OSPF_DBD_H);
! 209: if (p == NULL)
! 210: {
! 211: return (-1);
! 212: }
! 213:
! 214: memset(&dbd_hdr, 0, sizeof(dbd_hdr));
! 215: dbd_hdr.dbd_mtu_len = htons(dgram_len); /* Max length of IP packet IF can use */
! 216: dbd_hdr.dbd_opts = opts; /* OSPF_* options */
! 217: dbd_hdr.dbd_type = type; /* Type of exchange occuring */
! 218: dbd_hdr.dbd_seq = htonl(seqnum); /* DBD sequence number */
! 219:
! 220: n = libnet_pblock_append(l, p, (u_int8_t *)&dbd_hdr, LIBNET_OSPF_DBD_H);
! 221: if (n == -1)
! 222: {
! 223: goto bad;
! 224: }
! 225:
! 226: if ((payload && !payload_s) || (!payload && payload_s))
! 227: {
! 228: snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
! 229: "%s(): payload inconsistency\n", __func__);
! 230: goto bad;
! 231: }
! 232:
! 233: if (payload && payload_s)
! 234: {
! 235: n = libnet_pblock_append(l, p, payload, payload_s);
! 236: if (n == -1)
! 237: {
! 238: goto bad;
! 239: }
! 240: }
! 241:
! 242: return (ptag ? ptag : libnet_pblock_update(l, p, h,
! 243: LIBNET_PBLOCK_OSPF_DBD_H));
! 244: bad:
! 245: libnet_pblock_delete(l, p);
! 246: return (-1);
! 247: }
! 248:
! 249:
! 250: libnet_ptag_t
! 251: libnet_build_ospfv2_lsr(u_int32_t type, u_int lsid, u_int32_t advrtr,
! 252: u_int8_t *payload, u_int32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
! 253: {
! 254: u_int32_t n, h;
! 255: libnet_pblock_t *p;
! 256: struct libnet_lsr_hdr lsr_hdr;
! 257:
! 258: if (l == NULL)
! 259: {
! 260: return (-1);
! 261: }
! 262:
! 263: n = LIBNET_OSPF_LSR_H + payload_s;
! 264: h = 0;
! 265:
! 266: /*
! 267: * Find the existing protocol block if a ptag is specified, or create
! 268: * a new one.
! 269: */
! 270: p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_OSPF_LSR_H);
! 271: if (p == NULL)
! 272: {
! 273: return (-1);
! 274: }
! 275:
! 276: memset(&lsr_hdr, 0, sizeof(lsr_hdr));
! 277: lsr_hdr.lsr_type = htonl(type); /* Type of LS being requested */
! 278: lsr_hdr.lsr_lsid = htonl(lsid); /* Link State ID */
! 279: lsr_hdr.lsr_adrtr.s_addr = htonl(advrtr); /* Advertising router */
! 280:
! 281: n = libnet_pblock_append(l, p, (u_int8_t *)&lsr_hdr, LIBNET_OSPF_LSR_H);
! 282: if (n == -1)
! 283: {
! 284: goto bad;
! 285: }
! 286:
! 287: if ((payload && !payload_s) || (!payload && payload_s))
! 288: {
! 289: snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
! 290: "%s(): payload inconsistency\n", __func__);
! 291: goto bad;
! 292: }
! 293:
! 294: if (payload && payload_s)
! 295: {
! 296: n = libnet_pblock_append(l, p, payload, payload_s);
! 297: if (n == -1)
! 298: {
! 299: goto bad;
! 300: }
! 301: }
! 302:
! 303: return (ptag ? ptag : libnet_pblock_update(l, p, h,
! 304: LIBNET_PBLOCK_OSPF_LSR_H));
! 305: bad:
! 306: libnet_pblock_delete(l, p);
! 307: return (-1);
! 308: }
! 309:
! 310:
! 311: libnet_ptag_t
! 312: libnet_build_ospfv2_lsu(u_int32_t num, u_int8_t *payload, u_int32_t payload_s,
! 313: libnet_t *l, libnet_ptag_t ptag)
! 314: {
! 315: u_int32_t n, h;
! 316: libnet_pblock_t *p;
! 317: struct libnet_lsu_hdr lh_hdr;
! 318:
! 319: if (l == NULL)
! 320: {
! 321: return (-1);
! 322: }
! 323:
! 324: n = LIBNET_OSPF_LSU_H + payload_s;
! 325: h = 0;
! 326:
! 327: /*
! 328: * Find the existing protocol block if a ptag is specified, or create
! 329: * a new one.
! 330: */
! 331: p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_OSPF_LSU_H);
! 332: if (p == NULL)
! 333: {
! 334: return (-1);
! 335: }
! 336:
! 337: memset(&lh_hdr, 0, sizeof(lh_hdr));
! 338: lh_hdr.lsu_num = htonl(num); /* Number of LSAs that will be bcasted */
! 339:
! 340: n = libnet_pblock_append(l, p, (u_int8_t *)&lh_hdr, LIBNET_OSPF_LSU_H);
! 341: if (n == -1)
! 342: {
! 343: goto bad;
! 344: }
! 345:
! 346: if ((payload && !payload_s) || (!payload && payload_s))
! 347: {
! 348: snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
! 349: "%s(): payload inconsistency\n", __func__);
! 350: goto bad;
! 351: }
! 352:
! 353: if (payload && payload_s)
! 354: {
! 355: n = libnet_pblock_append(l, p, payload, payload_s);
! 356: if (n == -1)
! 357: {
! 358: goto bad;
! 359: }
! 360: }
! 361:
! 362: return (ptag ? ptag : libnet_pblock_update(l, p, h,
! 363: LIBNET_PBLOCK_OSPF_LSU_H));
! 364: bad:
! 365: libnet_pblock_delete(l, p);
! 366: return (-1);
! 367: }
! 368:
! 369:
! 370: libnet_ptag_t
! 371: libnet_build_ospfv2_lsa(u_int16_t age, u_int8_t opts, u_int8_t type, u_int lsid,
! 372: u_int32_t advrtr, u_int32_t seqnum, u_int16_t sum, u_int16_t len,
! 373: u_int8_t *payload, u_int32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
! 374: {
! 375: u_int32_t n, h;
! 376: libnet_pblock_t *p;
! 377: struct libnet_lsa_hdr lsa_hdr;
! 378:
! 379: if (l == NULL)
! 380: {
! 381: return (-1);
! 382: }
! 383:
! 384: n = LIBNET_OSPF_LSA_H + payload_s;
! 385: h = len + payload_s;
! 386:
! 387: /*
! 388: * Find the existing protocol block if a ptag is specified, or create
! 389: * a new one.
! 390: */
! 391: p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_OSPF_LSA_H);
! 392: if (p == NULL)
! 393: {
! 394: return (-1);
! 395: }
! 396:
! 397: memset(&lsa_hdr, 0, sizeof(lsa_hdr));
! 398: lsa_hdr.lsa_age = htons(age);
! 399: lsa_hdr.lsa_opts = opts;
! 400: lsa_hdr.lsa_type = type;
! 401: lsa_hdr.lsa_id = htonl(lsid);
! 402: lsa_hdr.lsa_adv.s_addr = htonl(advrtr);
! 403: lsa_hdr.lsa_seq = htonl(seqnum);
! 404: lsa_hdr.lsa_sum = (sum ? htons(sum) : 0);
! 405: lsa_hdr.lsa_len = htons(h);
! 406:
! 407: n = libnet_pblock_append(l, p, (u_int8_t *)&lsa_hdr, LIBNET_OSPF_LSA_H);
! 408: if (n == -1)
! 409: {
! 410: goto bad;
! 411: }
! 412:
! 413: if ((payload && !payload_s) || (!payload && payload_s))
! 414: {
! 415: snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
! 416: "%s(): payload inconsistency\n", __func__);
! 417: goto bad;
! 418: }
! 419:
! 420: if (payload && payload_s)
! 421: {
! 422: n = libnet_pblock_append(l, p, payload, payload_s);
! 423: if (n == -1)
! 424: {
! 425: goto bad;
! 426: }
! 427: }
! 428:
! 429: if (sum == 0)
! 430: {
! 431: /*
! 432: * If checksum is zero, by default libnet will compute a checksum
! 433: * for the user. The programmer can override this by calling
! 434: * libnet_toggle_checksum(l, ptag, 1);
! 435: */
! 436: libnet_pblock_setflags(p, LIBNET_PBLOCK_DO_CHECKSUM);
! 437: }
! 438: return (ptag ? ptag : libnet_pblock_update(l, p, h,
! 439: LIBNET_PBLOCK_OSPF_LSA_H));
! 440: bad:
! 441: libnet_pblock_delete(l, p);
! 442: return (-1);
! 443: }
! 444:
! 445:
! 446: libnet_ptag_t
! 447: libnet_build_ospfv2_lsa_rtr(u_int16_t flags, u_int16_t num, u_int32_t id,
! 448: u_int32_t data, u_int8_t type, u_int8_t tos, u_int16_t metric,
! 449: u_int8_t *payload, u_int32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
! 450: {
! 451: u_int32_t n, h;
! 452: libnet_pblock_t *p;
! 453: struct libnet_rtr_lsa_hdr rtr_lsa_hdr;
! 454:
! 455: if (l == NULL)
! 456: {
! 457: return (-1);
! 458: }
! 459:
! 460: n = LIBNET_OSPF_LS_RTR_H + payload_s;
! 461: h = 0;
! 462:
! 463: /*
! 464: * Find the existing protocol block if a ptag is specified, or create
! 465: * a new one.
! 466: */
! 467: p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_LS_RTR_H);
! 468: if (p == NULL)
! 469: {
! 470: return (-1);
! 471: }
! 472:
! 473: memset(&rtr_lsa_hdr, 0, sizeof(rtr_lsa_hdr));
! 474: rtr_lsa_hdr.rtr_flags = htons(flags);
! 475: rtr_lsa_hdr.rtr_num = htons(num);
! 476: rtr_lsa_hdr.rtr_link_id = htonl(id);
! 477: rtr_lsa_hdr.rtr_link_data = htonl(data);
! 478: rtr_lsa_hdr.rtr_type = type;
! 479: rtr_lsa_hdr.rtr_tos_num = tos;
! 480: rtr_lsa_hdr.rtr_metric = htons(metric);
! 481:
! 482: n = libnet_pblock_append(l, p, (u_int8_t *)&rtr_lsa_hdr,
! 483: LIBNET_OSPF_LS_RTR_H);
! 484: if (n == -1)
! 485: {
! 486: goto bad;
! 487: }
! 488:
! 489: if ((payload && !payload_s) || (!payload && payload_s))
! 490: {
! 491: snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
! 492: "%s(): payload inconsistency\n", __func__);
! 493: goto bad;
! 494: }
! 495:
! 496: if (payload && payload_s)
! 497: {
! 498: n = libnet_pblock_append(l, p, payload, payload_s);
! 499: if (n == -1)
! 500: {
! 501: goto bad;
! 502: }
! 503: }
! 504:
! 505: return (ptag ? ptag : libnet_pblock_update(l, p, h,
! 506: LIBNET_PBLOCK_LS_RTR_H));
! 507: bad:
! 508: libnet_pblock_delete(l, p);
! 509: return (-1);
! 510: }
! 511:
! 512:
! 513: libnet_ptag_t
! 514: libnet_build_ospfv2_lsa_net(u_int32_t nmask, u_int32_t rtrid,
! 515: u_int8_t *payload, u_int32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
! 516: {
! 517: u_int32_t n, h;
! 518: libnet_pblock_t *p;
! 519: struct libnet_net_lsa_hdr net_lsa_hdr;
! 520:
! 521: if (l == NULL)
! 522: {
! 523: return (-1);
! 524: }
! 525:
! 526: n = LIBNET_OSPF_LS_NET_H + payload_s;
! 527: h = 0;
! 528:
! 529: /*
! 530: * Find the existing protocol block if a ptag is specified, or create
! 531: * a new one.
! 532: */
! 533: p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_LS_NET_H);
! 534: if (p == NULL)
! 535: {
! 536: return (-1);
! 537: }
! 538:
! 539: memset(&net_lsa_hdr, 0, sizeof(net_lsa_hdr));
! 540: net_lsa_hdr.net_nmask.s_addr = htonl(nmask);
! 541: net_lsa_hdr.net_rtr_id = htonl(rtrid);
! 542:
! 543: n = libnet_pblock_append(l, p, (u_int8_t *)&net_lsa_hdr,
! 544: LIBNET_OSPF_LS_NET_H);
! 545: if (n == -1)
! 546: {
! 547: goto bad;
! 548: }
! 549:
! 550: if ((payload && !payload_s) || (!payload && payload_s))
! 551: {
! 552: snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
! 553: "%s(): payload inconsistency\n", __func__);
! 554: goto bad;
! 555: }
! 556:
! 557: if (payload && payload_s)
! 558: {
! 559: n = libnet_pblock_append(l, p, payload, payload_s);
! 560: if (n == -1)
! 561: {
! 562: goto bad;
! 563: }
! 564: }
! 565:
! 566: return (ptag ? ptag : libnet_pblock_update(l, p, h,
! 567: LIBNET_PBLOCK_LS_NET_H));
! 568: bad:
! 569: libnet_pblock_delete(l, p);
! 570: return (-1);
! 571: }
! 572:
! 573:
! 574: libnet_ptag_t
! 575: libnet_build_ospfv2_lsa_sum(u_int32_t nmask, u_int32_t metric, u_int tos,
! 576: u_int8_t *payload, u_int32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
! 577: {
! 578: u_int32_t n, h;
! 579: libnet_pblock_t *p;
! 580: struct libnet_sum_lsa_hdr sum_lsa_hdr;
! 581:
! 582: if (l == NULL)
! 583: {
! 584: return (-1);
! 585: }
! 586:
! 587: n = LIBNET_OSPF_LS_SUM_H + payload_s;
! 588: h = 0;
! 589:
! 590: /*
! 591: * Find the existing protocol block if a ptag is specified, or create
! 592: * a new one.
! 593: */
! 594: p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_LS_SUM_H);
! 595: if (p == NULL)
! 596: {
! 597: return (-1);
! 598: }
! 599:
! 600: memset(&sum_lsa_hdr, 0, sizeof(sum_lsa_hdr));
! 601: sum_lsa_hdr.sum_nmask.s_addr = htonl(nmask);
! 602: sum_lsa_hdr.sum_metric = htonl(metric);
! 603: sum_lsa_hdr.sum_tos_metric = htonl(tos);
! 604:
! 605: n = libnet_pblock_append(l, p, (u_int8_t *)&sum_lsa_hdr,
! 606: LIBNET_OSPF_LS_SUM_H);
! 607: if (n == -1)
! 608: {
! 609: goto bad;
! 610: }
! 611:
! 612: if ((payload && !payload_s) || (!payload && payload_s))
! 613: {
! 614: snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
! 615: "%s(): payload inconsistency\n", __func__);
! 616: goto bad;
! 617: }
! 618:
! 619: if (payload && payload_s)
! 620: {
! 621: n = libnet_pblock_append(l, p, payload, payload_s);
! 622: if (n == -1)
! 623: {
! 624: goto bad;
! 625: }
! 626: }
! 627:
! 628: return (ptag ? ptag : libnet_pblock_update(l, p, h,
! 629: LIBNET_PBLOCK_LS_SUM_H));
! 630: bad:
! 631: libnet_pblock_delete(l, p);
! 632: return (-1);
! 633: }
! 634:
! 635:
! 636: libnet_ptag_t
! 637: libnet_build_ospfv2_lsa_as(u_int32_t nmask, u_int metric, u_int32_t fwdaddr,
! 638: u_int32_t tag, u_int8_t *payload, u_int32_t payload_s, libnet_t *l,
! 639: libnet_ptag_t ptag)
! 640: {
! 641: u_int32_t n, h;
! 642: libnet_pblock_t *p;
! 643: struct libnet_as_lsa_hdr as_lsa_hdr;
! 644:
! 645: if (l == NULL)
! 646: {
! 647: return (-1);
! 648: }
! 649:
! 650: n = LIBNET_OSPF_LS_AS_EXT_H + payload_s;
! 651: h = 0;
! 652:
! 653: /*
! 654: * Find the existing protocol block if a ptag is specified, or create
! 655: * a new one.
! 656: */
! 657: p = libnet_pblock_probe(l, ptag, n, LIBNET_PBLOCK_LS_AS_EXT_H);
! 658: if (p == NULL)
! 659: {
! 660: return (-1);
! 661: }
! 662:
! 663: memset(&as_lsa_hdr, 0, sizeof(as_lsa_hdr));
! 664: as_lsa_hdr.as_nmask.s_addr = htonl(nmask);
! 665: as_lsa_hdr.as_metric = htonl(metric);
! 666: as_lsa_hdr.as_fwd_addr.s_addr = htonl(fwdaddr);
! 667: as_lsa_hdr.as_rte_tag = htonl(tag);
! 668:
! 669: n = libnet_pblock_append(l, p, (u_int8_t *)&as_lsa_hdr,
! 670: LIBNET_OSPF_LS_AS_EXT_H);
! 671: if (n == -1)
! 672: {
! 673: goto bad;
! 674: }
! 675:
! 676: if ((payload && !payload_s) || (!payload && payload_s))
! 677: {
! 678: snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
! 679: "%s(): payload inconsistency\n", __func__);
! 680: goto bad;
! 681: }
! 682:
! 683: if (payload && payload_s)
! 684: {
! 685: n = libnet_pblock_append(l, p, payload, payload_s);
! 686: if (n == -1)
! 687: {
! 688: goto bad;
! 689: }
! 690: }
! 691:
! 692: return (ptag ? ptag : libnet_pblock_update(l, p, h,
! 693: LIBNET_PBLOCK_LS_AS_EXT_H));
! 694: bad:
! 695: libnet_pblock_delete(l, p);
! 696: return (-1);
! 697: }
! 698:
! 699: /* EOF */
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