1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1983, 1988, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #if 0 33 #ifndef lint 34 static char sccsid[] = "From: @(#)route.c 8.6 (Berkeley) 4/28/95"; 35 #endif /* not lint */ 36 #endif 37 38 #include <sys/cdefs.h> 39 __FBSDID("$FreeBSD$"); 40 41 #include <sys/param.h> 42 #include <sys/protosw.h> 43 #include <sys/socket.h> 44 #include <sys/socketvar.h> 45 #include <sys/sysctl.h> 46 #include <sys/time.h> 47 48 #include <net/ethernet.h> 49 #include <net/if.h> 50 #include <net/if_dl.h> 51 #include <net/if_types.h> 52 #include <net/route.h> 53 54 #include <netinet/in.h> 55 #include <netgraph/ng_socket.h> 56 57 #include <arpa/inet.h> 58 #include <ifaddrs.h> 59 #include <libutil.h> 60 #include <netdb.h> 61 #include <stdbool.h> 62 #include <stdint.h> 63 #include <stdio.h> 64 #include <stdlib.h> 65 #include <stdbool.h> 66 #include <string.h> 67 #include <sysexits.h> 68 #include <unistd.h> 69 #include <err.h> 70 #include <libxo/xo.h> 71 #include "netstat.h" 72 #include "nl_defs.h" 73 74 /* 75 * Definitions for showing gateway flags. 76 */ 77 static struct bits { 78 u_long b_mask; 79 char b_val; 80 const char *b_name; 81 } bits[] = { 82 { RTF_UP, 'U', "up" }, 83 { RTF_GATEWAY, 'G', "gateway" }, 84 { RTF_HOST, 'H', "host" }, 85 { RTF_REJECT, 'R', "reject" }, 86 { RTF_DYNAMIC, 'D', "dynamic" }, 87 { RTF_MODIFIED, 'M', "modified" }, 88 { RTF_DONE, 'd', "done" }, /* Completed -- for routing msgs only */ 89 { RTF_XRESOLVE, 'X', "xresolve" }, 90 { RTF_STATIC, 'S', "static" }, 91 { RTF_PROTO1, '1', "proto1" }, 92 { RTF_PROTO2, '2', "proto2" }, 93 { RTF_PROTO3, '3', "proto3" }, 94 { RTF_BLACKHOLE,'B', "blackhole" }, 95 { RTF_BROADCAST,'b', "broadcast" }, 96 #ifdef RTF_LLINFO 97 { RTF_LLINFO, 'L', "llinfo" }, 98 #endif 99 { 0 , 0, NULL } 100 }; 101 102 struct ifmap_entry { 103 char ifname[IFNAMSIZ]; 104 }; 105 static struct ifmap_entry *ifmap; 106 static int ifmap_size; 107 static struct timespec uptime; 108 109 static const char *netname4(in_addr_t, in_addr_t); 110 #ifdef INET6 111 static const char *netname6(struct sockaddr_in6 *, struct sockaddr_in6 *); 112 #endif 113 static void p_rtable_sysctl(int, int); 114 static void p_rtentry_sysctl(const char *name, struct rt_msghdr *); 115 static int p_sockaddr(const char *name, struct sockaddr *, struct sockaddr *, 116 int, int); 117 static const char *fmt_sockaddr(struct sockaddr *sa, struct sockaddr *mask, 118 int flags); 119 static void p_flags(int, const char *); 120 static const char *fmt_flags(int f); 121 static void domask(char *, size_t, u_long); 122 123 124 /* 125 * Print routing tables. 126 */ 127 void 128 routepr(int fibnum, int af) 129 { 130 size_t intsize; 131 int numfibs; 132 133 if (live == 0) 134 return; 135 136 intsize = sizeof(int); 137 if (fibnum == -1 && 138 sysctlbyname("net.my_fibnum", &fibnum, &intsize, NULL, 0) == -1) 139 fibnum = 0; 140 if (sysctlbyname("net.fibs", &numfibs, &intsize, NULL, 0) == -1) 141 numfibs = 1; 142 if (fibnum < 0 || fibnum > numfibs - 1) 143 errx(EX_USAGE, "%d: invalid fib", fibnum); 144 /* 145 * Since kernel & userland use different timebase 146 * (time_uptime vs time_second) and we are reading kernel memory 147 * directly we should do rt_expire --> expire_time conversion. 148 */ 149 if (clock_gettime(CLOCK_UPTIME, &uptime) < 0) 150 err(EX_OSERR, "clock_gettime() failed"); 151 152 xo_open_container("route-information"); 153 xo_emit("{T:Routing tables}"); 154 if (fibnum) 155 xo_emit(" ({L:fib}: {:fib/%d})", fibnum); 156 xo_emit("\n"); 157 p_rtable_sysctl(fibnum, af); 158 xo_close_container("route-information"); 159 } 160 161 162 /* 163 * Print address family header before a section of the routing table. 164 */ 165 void 166 pr_family(int af1) 167 { 168 const char *afname; 169 170 switch (af1) { 171 case AF_INET: 172 afname = "Internet"; 173 break; 174 #ifdef INET6 175 case AF_INET6: 176 afname = "Internet6"; 177 break; 178 #endif /*INET6*/ 179 case AF_ISO: 180 afname = "ISO"; 181 break; 182 case AF_CCITT: 183 afname = "X.25"; 184 break; 185 case AF_NETGRAPH: 186 afname = "Netgraph"; 187 break; 188 default: 189 afname = NULL; 190 break; 191 } 192 if (afname) 193 xo_emit("\n{k:address-family/%s}:\n", afname); 194 else 195 xo_emit("\n{L:Protocol Family} {k:address-family/%d}:\n", af1); 196 } 197 198 /* column widths; each followed by one space */ 199 #ifndef INET6 200 #define WID_DST_DEFAULT(af) 18 /* width of destination column */ 201 #define WID_GW_DEFAULT(af) 18 /* width of gateway column */ 202 #define WID_IF_DEFAULT(af) (Wflag ? 10 : 8) /* width of netif column */ 203 #else 204 #define WID_DST_DEFAULT(af) \ 205 ((af) == AF_INET6 ? (numeric_addr ? 33: 18) : 18) 206 #define WID_GW_DEFAULT(af) \ 207 ((af) == AF_INET6 ? (numeric_addr ? 29 : 18) : 18) 208 #define WID_IF_DEFAULT(af) ((af) == AF_INET6 ? 8 : (Wflag ? 10 : 8)) 209 #endif /*INET6*/ 210 211 static int wid_dst; 212 static int wid_gw; 213 static int wid_flags; 214 static int wid_pksent; 215 static int wid_mtu; 216 static int wid_if; 217 static int wid_expire; 218 219 /* 220 * Print header for routing table columns. 221 */ 222 static void 223 pr_rthdr(int af1 __unused) 224 { 225 226 if (Wflag) { 227 xo_emit("{T:/%-*.*s} {T:/%-*.*s} {T:/%-*.*s} {T:/%*.*s} " 228 "{T:/%*.*s} {T:/%*.*s} {T:/%*s}\n", 229 wid_dst, wid_dst, "Destination", 230 wid_gw, wid_gw, "Gateway", 231 wid_flags, wid_flags, "Flags", 232 wid_pksent, wid_pksent, "Use", 233 wid_mtu, wid_mtu, "Mtu", 234 wid_if, wid_if, "Netif", 235 wid_expire, "Expire"); 236 } else { 237 xo_emit("{T:/%-*.*s} {T:/%-*.*s} {T:/%-*.*s} {T:/%*.*s} " 238 "{T:/%*s}\n", 239 wid_dst, wid_dst, "Destination", 240 wid_gw, wid_gw, "Gateway", 241 wid_flags, wid_flags, "Flags", 242 wid_if, wid_if, "Netif", 243 wid_expire, "Expire"); 244 } 245 } 246 247 static void 248 p_rtable_sysctl(int fibnum, int af) 249 { 250 size_t needed; 251 int mib[7]; 252 char *buf, *next, *lim; 253 struct rt_msghdr *rtm; 254 struct sockaddr *sa; 255 int fam = AF_UNSPEC, ifindex = 0, size; 256 int need_table_close = false; 257 258 struct ifaddrs *ifap, *ifa; 259 struct sockaddr_dl *sdl; 260 261 /* 262 * Retrieve interface list at first 263 * since we need #ifindex -> if_xname match 264 */ 265 if (getifaddrs(&ifap) != 0) 266 err(EX_OSERR, "getifaddrs"); 267 268 for (ifa = ifap; ifa; ifa = ifa->ifa_next) { 269 270 if (ifa->ifa_addr->sa_family != AF_LINK) 271 continue; 272 273 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 274 ifindex = sdl->sdl_index; 275 276 if (ifindex >= ifmap_size) { 277 size = roundup(ifindex + 1, 32) * 278 sizeof(struct ifmap_entry); 279 if ((ifmap = realloc(ifmap, size)) == NULL) 280 errx(2, "realloc(%d) failed", size); 281 memset(&ifmap[ifmap_size], 0, 282 size - ifmap_size * 283 sizeof(struct ifmap_entry)); 284 285 ifmap_size = roundup(ifindex + 1, 32); 286 } 287 288 if (*ifmap[ifindex].ifname != '\0') 289 continue; 290 291 strlcpy(ifmap[ifindex].ifname, ifa->ifa_name, IFNAMSIZ); 292 } 293 294 freeifaddrs(ifap); 295 296 mib[0] = CTL_NET; 297 mib[1] = PF_ROUTE; 298 mib[2] = 0; 299 mib[3] = af; 300 mib[4] = NET_RT_DUMP; 301 mib[5] = 0; 302 mib[6] = fibnum; 303 if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0) 304 err(EX_OSERR, "sysctl: net.route.0.%d.dump.%d estimate", af, 305 fibnum); 306 if ((buf = malloc(needed)) == NULL) 307 errx(2, "malloc(%lu)", (unsigned long)needed); 308 if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0) 309 err(1, "sysctl: net.route.0.%d.dump.%d", af, fibnum); 310 lim = buf + needed; 311 xo_open_container("route-table"); 312 xo_open_list("rt-family"); 313 for (next = buf; next < lim; next += rtm->rtm_msglen) { 314 rtm = (struct rt_msghdr *)next; 315 if (rtm->rtm_version != RTM_VERSION) 316 continue; 317 /* 318 * Peek inside header to determine AF 319 */ 320 sa = (struct sockaddr *)(rtm + 1); 321 /* Only print family first time. */ 322 if (fam != sa->sa_family) { 323 if (need_table_close) { 324 xo_close_list("rt-entry"); 325 xo_close_instance("rt-family"); 326 } 327 need_table_close = true; 328 329 fam = sa->sa_family; 330 wid_dst = WID_DST_DEFAULT(fam); 331 wid_gw = WID_GW_DEFAULT(fam); 332 wid_flags = 6; 333 wid_pksent = 8; 334 wid_mtu = 6; 335 wid_if = WID_IF_DEFAULT(fam); 336 wid_expire = 6; 337 xo_open_instance("rt-family"); 338 pr_family(fam); 339 xo_open_list("rt-entry"); 340 341 pr_rthdr(fam); 342 } 343 p_rtentry_sysctl("rt-entry", rtm); 344 } 345 if (need_table_close) { 346 xo_close_list("rt-entry"); 347 xo_close_instance("rt-family"); 348 } 349 xo_close_list("rt-family"); 350 xo_close_container("route-table"); 351 free(buf); 352 } 353 354 static void 355 p_rtentry_sysctl(const char *name, struct rt_msghdr *rtm) 356 { 357 struct sockaddr *sa, *addr[RTAX_MAX]; 358 char buffer[128]; 359 char prettyname[128]; 360 int i, protrusion; 361 362 xo_open_instance(name); 363 sa = (struct sockaddr *)(rtm + 1); 364 for (i = 0; i < RTAX_MAX; i++) { 365 if (rtm->rtm_addrs & (1 << i)) { 366 addr[i] = sa; 367 sa = (struct sockaddr *)((char *)sa + SA_SIZE(sa)); 368 } 369 } 370 371 protrusion = p_sockaddr("destination", addr[RTAX_DST], 372 addr[RTAX_NETMASK], 373 rtm->rtm_flags, wid_dst); 374 protrusion = p_sockaddr("gateway", addr[RTAX_GATEWAY], NULL, RTF_HOST, 375 wid_gw - protrusion); 376 snprintf(buffer, sizeof(buffer), "{[:-%d}{:flags/%%s}{]:} ", 377 wid_flags - protrusion); 378 p_flags(rtm->rtm_flags, buffer); 379 if (Wflag) { 380 xo_emit("{t:use/%*lu} ", wid_pksent, rtm->rtm_rmx.rmx_pksent); 381 382 if (rtm->rtm_rmx.rmx_mtu != 0) 383 xo_emit("{t:mtu/%*lu} ", wid_mtu, rtm->rtm_rmx.rmx_mtu); 384 else 385 xo_emit("{P:/%*s} ", wid_mtu, ""); 386 } 387 388 memset(prettyname, 0, sizeof(prettyname)); 389 if (rtm->rtm_index < ifmap_size) { 390 strlcpy(prettyname, ifmap[rtm->rtm_index].ifname, 391 sizeof(prettyname)); 392 if (*prettyname == '\0') 393 strlcpy(prettyname, "---", sizeof(prettyname)); 394 } 395 396 if (Wflag) 397 xo_emit("{t:interface-name/%*s}", wid_if, prettyname); 398 else 399 xo_emit("{t:interface-name/%*.*s}", wid_if, wid_if, 400 prettyname); 401 if (rtm->rtm_rmx.rmx_expire) { 402 time_t expire_time; 403 404 if ((expire_time = rtm->rtm_rmx.rmx_expire - uptime.tv_sec) > 0) 405 xo_emit(" {:expire-time/%*d}", wid_expire, 406 (int)expire_time); 407 } 408 409 xo_emit("\n"); 410 xo_close_instance(name); 411 } 412 413 static int 414 p_sockaddr(const char *name, struct sockaddr *sa, struct sockaddr *mask, 415 int flags, int width) 416 { 417 const char *cp; 418 char buf[128]; 419 int protrusion; 420 421 cp = fmt_sockaddr(sa, mask, flags); 422 423 if (width < 0) { 424 snprintf(buf, sizeof(buf), "{:%s/%%s} ", name); 425 xo_emit(buf, cp); 426 protrusion = 0; 427 } else { 428 if (Wflag != 0 || numeric_addr) { 429 snprintf(buf, sizeof(buf), "{[:%d}{:%s/%%s}{]:} ", 430 -width, name); 431 xo_emit(buf, cp); 432 protrusion = strlen(cp) - width; 433 if (protrusion < 0) 434 protrusion = 0; 435 } else { 436 snprintf(buf, sizeof(buf), "{[:%d}{:%s/%%-.*s}{]:} ", 437 -width, name); 438 xo_emit(buf, width, cp); 439 protrusion = 0; 440 } 441 } 442 return (protrusion); 443 } 444 445 static const char * 446 fmt_sockaddr(struct sockaddr *sa, struct sockaddr *mask, int flags) 447 { 448 static char buf[128]; 449 const char *cp; 450 451 if (sa == NULL) 452 return ("null"); 453 454 switch(sa->sa_family) { 455 #ifdef INET6 456 case AF_INET6: 457 /* 458 * The sa6->sin6_scope_id must be filled here because 459 * this sockaddr is extracted from kmem(4) directly 460 * and has KAME-specific embedded scope id in 461 * sa6->sin6_addr.s6_addr[2]. 462 */ 463 in6_fillscopeid(satosin6(sa)); 464 /* FALLTHROUGH */ 465 #endif /*INET6*/ 466 case AF_INET: 467 if (flags & RTF_HOST) 468 cp = routename(sa, numeric_addr); 469 else if (mask) 470 cp = netname(sa, mask); 471 else 472 cp = netname(sa, NULL); 473 break; 474 case AF_NETGRAPH: 475 { 476 strlcpy(buf, ((struct sockaddr_ng *)sa)->sg_data, 477 sizeof(buf)); 478 cp = buf; 479 break; 480 } 481 case AF_LINK: 482 { 483 #if 0 484 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa; 485 486 /* Interface route. */ 487 if (sdl->sdl_nlen) 488 cp = sdl->sdl_data; 489 else 490 #endif 491 cp = routename(sa, 1); 492 break; 493 } 494 default: 495 { 496 u_char *s = (u_char *)sa->sa_data, *slim; 497 char *cq, *cqlim; 498 499 cq = buf; 500 slim = sa->sa_len + (u_char *) sa; 501 cqlim = cq + sizeof(buf) - sizeof(" ffff"); 502 snprintf(cq, sizeof(buf), "(%d)", sa->sa_family); 503 cq += strlen(cq); 504 while (s < slim && cq < cqlim) { 505 snprintf(cq, sizeof(" ff"), " %02x", *s++); 506 cq += strlen(cq); 507 if (s < slim) { 508 snprintf(cq, sizeof("ff"), "%02x", *s++); 509 cq += strlen(cq); 510 } 511 } 512 cp = buf; 513 } 514 } 515 516 return (cp); 517 } 518 519 static void 520 p_flags(int f, const char *format) 521 { 522 struct bits *p; 523 524 xo_emit(format, fmt_flags(f)); 525 526 xo_open_list("flags_pretty"); 527 for (p = bits; p->b_mask; p++) 528 if (p->b_mask & f) 529 xo_emit("{le:flags_pretty/%s}", p->b_name); 530 xo_close_list("flags_pretty"); 531 } 532 533 static const char * 534 fmt_flags(int f) 535 { 536 static char name[33]; 537 char *flags; 538 struct bits *p = bits; 539 540 for (flags = name; p->b_mask; p++) 541 if (p->b_mask & f) 542 *flags++ = p->b_val; 543 *flags = '\0'; 544 return (name); 545 } 546 547 char * 548 routename(struct sockaddr *sa, int flags) 549 { 550 static char line[NI_MAXHOST]; 551 int error, f; 552 553 f = (flags) ? NI_NUMERICHOST : 0; 554 error = getnameinfo(sa, sa->sa_len, line, sizeof(line), 555 NULL, 0, f); 556 if (error) { 557 const void *src; 558 switch (sa->sa_family) { 559 #ifdef INET 560 case AF_INET: 561 src = &satosin(sa)->sin_addr; 562 break; 563 #endif /* INET */ 564 #ifdef INET6 565 case AF_INET6: 566 src = &satosin6(sa)->sin6_addr; 567 break; 568 #endif /* INET6 */ 569 default: 570 return(line); 571 } 572 inet_ntop(sa->sa_family, src, line, sizeof(line) - 1); 573 return (line); 574 } 575 trimdomain(line, strlen(line)); 576 577 return (line); 578 } 579 580 #define NSHIFT(m) ( \ 581 (m) == IN_CLASSA_NET ? IN_CLASSA_NSHIFT : \ 582 (m) == IN_CLASSB_NET ? IN_CLASSB_NSHIFT : \ 583 (m) == IN_CLASSC_NET ? IN_CLASSC_NSHIFT : \ 584 0) 585 586 static void 587 domask(char *dst, size_t buflen, u_long mask) 588 { 589 int b, i; 590 591 if (mask == 0) { 592 *dst = '\0'; 593 return; 594 } 595 i = 0; 596 for (b = 0; b < 32; b++) 597 if (mask & (1 << b)) { 598 int bb; 599 600 i = b; 601 for (bb = b+1; bb < 32; bb++) 602 if (!(mask & (1 << bb))) { 603 i = -1; /* noncontig */ 604 break; 605 } 606 break; 607 } 608 if (i == -1) 609 snprintf(dst, buflen, "&0x%lx", mask); 610 else 611 snprintf(dst, buflen, "/%d", 32-i); 612 } 613 614 /* 615 * Return the name of the network whose address is given. 616 */ 617 const char * 618 netname(struct sockaddr *sa, struct sockaddr *mask) 619 { 620 switch (sa->sa_family) { 621 case AF_INET: 622 if (mask != NULL) 623 return (netname4(satosin(sa)->sin_addr.s_addr, 624 satosin(mask)->sin_addr.s_addr)); 625 else 626 return (netname4(satosin(sa)->sin_addr.s_addr, 627 INADDR_ANY)); 628 break; 629 #ifdef INET6 630 case AF_INET6: 631 return (netname6(satosin6(sa), satosin6(mask))); 632 #endif /* INET6 */ 633 default: 634 return (NULL); 635 } 636 } 637 638 static const char * 639 netname4(in_addr_t in, in_addr_t mask) 640 { 641 char *cp = 0; 642 static char line[MAXHOSTNAMELEN + sizeof("&0xffffffff")]; 643 char nline[INET_ADDRSTRLEN]; 644 struct netent *np = 0; 645 in_addr_t i; 646 647 if (in == INADDR_ANY && mask == 0) { 648 strlcpy(line, "default", sizeof(line)); 649 return (line); 650 } 651 652 /* It is ok to supply host address. */ 653 in &= mask; 654 655 i = ntohl(in); 656 if (!numeric_addr && i) { 657 np = getnetbyaddr(i >> NSHIFT(ntohl(mask)), AF_INET); 658 if (np != NULL) { 659 cp = np->n_name; 660 trimdomain(cp, strlen(cp)); 661 } 662 } 663 if (cp != NULL) 664 strlcpy(line, cp, sizeof(line)); 665 else { 666 inet_ntop(AF_INET, &in, nline, sizeof(nline)); 667 strlcpy(line, nline, sizeof(line)); 668 domask(line + strlen(line), sizeof(line) - strlen(line), ntohl(mask)); 669 } 670 671 return (line); 672 } 673 674 #undef NSHIFT 675 676 #ifdef INET6 677 void 678 in6_fillscopeid(struct sockaddr_in6 *sa6) 679 { 680 #if defined(__KAME__) 681 /* 682 * XXX: This is a special workaround for KAME kernels. 683 * sin6_scope_id field of SA should be set in the future. 684 */ 685 if (IN6_IS_ADDR_LINKLOCAL(&sa6->sin6_addr) || 686 IN6_IS_ADDR_MC_NODELOCAL(&sa6->sin6_addr) || 687 IN6_IS_ADDR_MC_LINKLOCAL(&sa6->sin6_addr)) { 688 if (sa6->sin6_scope_id == 0) 689 sa6->sin6_scope_id = 690 ntohs(*(u_int16_t *)&sa6->sin6_addr.s6_addr[2]); 691 sa6->sin6_addr.s6_addr[2] = sa6->sin6_addr.s6_addr[3] = 0; 692 } 693 #endif 694 } 695 696 /* Mask to length table. To check an invalid value, (length + 1) is used. */ 697 static const u_char masktolen[256] = { 698 [0xff] = 8 + 1, 699 [0xfe] = 7 + 1, 700 [0xfc] = 6 + 1, 701 [0xf8] = 5 + 1, 702 [0xf0] = 4 + 1, 703 [0xe0] = 3 + 1, 704 [0xc0] = 2 + 1, 705 [0x80] = 1 + 1, 706 [0x00] = 0 + 1, 707 }; 708 709 static const char * 710 netname6(struct sockaddr_in6 *sa6, struct sockaddr_in6 *mask) 711 { 712 static char line[NI_MAXHOST + sizeof("/xxx") - 1]; 713 struct sockaddr_in6 addr; 714 char nline[NI_MAXHOST]; 715 char maskbuf[sizeof("/xxx")]; 716 u_char *p, *lim; 717 u_char masklen; 718 int i; 719 bool illegal = false; 720 721 if (mask) { 722 p = (u_char *)&mask->sin6_addr; 723 for (masklen = 0, lim = p + 16; p < lim; p++) { 724 if (masktolen[*p] > 0) { 725 /* -1 is required. */ 726 masklen += (masktolen[*p] - 1); 727 } else 728 illegal = true; 729 } 730 if (illegal) 731 xo_error("illegal prefixlen\n"); 732 733 memcpy(&addr, sa6, sizeof(addr)); 734 for (i = 0; i < 16; ++i) 735 addr.sin6_addr.s6_addr[i] &= 736 mask->sin6_addr.s6_addr[i]; 737 sa6 = &addr; 738 } 739 else 740 masklen = 128; 741 742 if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&sa6->sin6_addr)) 743 return("default"); 744 745 getnameinfo((struct sockaddr *)sa6, sa6->sin6_len, nline, sizeof(nline), 746 NULL, 0, NI_NUMERICHOST); 747 if (numeric_addr) 748 strlcpy(line, nline, sizeof(line)); 749 else 750 getnameinfo((struct sockaddr *)sa6, sa6->sin6_len, line, 751 sizeof(line), NULL, 0, 0); 752 if (numeric_addr || strcmp(line, nline) == 0) { 753 snprintf(maskbuf, sizeof(maskbuf), "/%d", masklen); 754 strlcat(line, maskbuf, sizeof(line)); 755 } 756 757 return (line); 758 } 759 #endif /*INET6*/ 760 761 /* 762 * Print routing statistics 763 */ 764 void 765 rt_stats(void) 766 { 767 struct rtstat rtstat; 768 u_long rtsaddr, rttaddr; 769 int rttrash; 770 771 if ((rtsaddr = nl[N_RTSTAT].n_value) == 0) { 772 xo_emit("{W:rtstat: symbol not in namelist}\n"); 773 return; 774 } 775 if ((rttaddr = nl[N_RTTRASH].n_value) == 0) { 776 xo_emit("{W:rttrash: symbol not in namelist}\n"); 777 return; 778 } 779 kread_counters(rtsaddr, (char *)&rtstat, sizeof (rtstat)); 780 kread(rttaddr, (char *)&rttrash, sizeof (rttrash)); 781 xo_emit("{T:routing}:\n"); 782 783 #define p(f, m) if (rtstat.f || sflag <= 1) \ 784 xo_emit(m, rtstat.f, plural(rtstat.f)) 785 786 p(rts_badredirect, "\t{:bad-redirects/%ju} " 787 "{N:/bad routing redirect%s}\n"); 788 p(rts_dynamic, "\t{:dynamically-created/%ju} " 789 "{N:/dynamically created route%s}\n"); 790 p(rts_newgateway, "\t{:new-gateways/%ju} " 791 "{N:/new gateway%s due to redirects}\n"); 792 p(rts_unreach, "\t{:unreachable-destination/%ju} " 793 "{N:/destination%s found unreachable}\n"); 794 p(rts_wildcard, "\t{:wildcard-uses/%ju} " 795 "{N:/use%s of a wildcard route}\n"); 796 #undef p 797 798 if (rttrash || sflag <= 1) 799 xo_emit("\t{:unused-but-not-freed/%u} " 800 "{N:/route%s not in table but not freed}\n", 801 rttrash, plural(rttrash)); 802 } 803