route.c revision 58035
1/* 2 * PPP Routing related Module 3 * 4 * Written by Toshiharu OHNO (tony-o@iij.ad.jp) 5 * 6 * Copyright (C) 1994, Internet Initiative Japan, Inc. All rights reserverd. 7 * 8 * Redistribution and use in source and binary forms are permitted 9 * provided that the above copyright notice and this paragraph are 10 * duplicated in all such forms and that any documentation, 11 * advertising materials, and other materials related to such 12 * distribution and use acknowledge that the software was developed 13 * by the Internet Initiative Japan, Inc. The name of the 14 * IIJ may not be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 18 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 19 * 20 * $FreeBSD: head/usr.sbin/ppp/route.c 58035 2000-03-14 01:46:56Z brian $ 21 * 22 */ 23 24#include <sys/param.h> 25#include <sys/socket.h> 26#include <net/if_types.h> 27#include <net/route.h> 28#include <net/if.h> 29#include <netinet/in.h> 30#include <arpa/inet.h> 31#include <net/if_dl.h> 32#include <netinet/in_systm.h> 33#include <netinet/ip.h> 34#include <sys/un.h> 35#ifndef NOINET6 36#include <netinet6/in6.h> 37#endif 38#include <netdb.h> 39 40#include <errno.h> 41#include <stdio.h> 42#include <stdlib.h> 43#include <string.h> 44#include <sys/sysctl.h> 45#include <termios.h> 46 47#include "layer.h" 48#include "defs.h" 49#include "command.h" 50#include "mbuf.h" 51#include "log.h" 52#include "iplist.h" 53#include "timer.h" 54#include "throughput.h" 55#include "lqr.h" 56#include "hdlc.h" 57#include "fsm.h" 58#include "lcp.h" 59#include "ccp.h" 60#include "link.h" 61#include "slcompress.h" 62#include "ipcp.h" 63#include "filter.h" 64#include "descriptor.h" 65#include "mp.h" 66#ifndef NORADIUS 67#include "radius.h" 68#endif 69#include "bundle.h" 70#include "route.h" 71#include "prompt.h" 72#include "iface.h" 73 74 75static void 76p_sockaddr(struct prompt *prompt, struct sockaddr *phost, 77 struct sockaddr *pmask, int width) 78{ 79 char buf[29]; 80 struct sockaddr_in *ihost4 = (struct sockaddr_in *)phost; 81 struct sockaddr_in *mask4 = (struct sockaddr_in *)pmask; 82 struct sockaddr_dl *dl = (struct sockaddr_dl *)phost; 83 84 if (log_IsKept(LogDEBUG)) { 85 char tmp[50]; 86 87 log_Printf(LogDEBUG, "Found the following sockaddr:\n"); 88 log_Printf(LogDEBUG, " Family %d, len %d\n", 89 (int)phost->sa_family, (int)phost->sa_len); 90 inet_ntop(phost->sa_family, phost->sa_data, tmp, sizeof tmp); 91 log_Printf(LogDEBUG, " Addr %s\n", tmp); 92 if (pmask) { 93 inet_ntop(pmask->sa_family, pmask->sa_data, tmp, sizeof tmp); 94 log_Printf(LogDEBUG, " Mask %s\n", tmp); 95 } 96 } 97 98 switch (phost->sa_family) { 99 case AF_INET: 100 if (!phost) 101 buf[0] = '\0'; 102 else if (ihost4->sin_addr.s_addr == INADDR_ANY) 103 strcpy(buf, "default"); 104 else if (!pmask) 105 strcpy(buf, inet_ntoa(ihost4->sin_addr)); 106 else { 107 u_int32_t msk = ntohl(mask4->sin_addr.s_addr); 108 u_int32_t tst; 109 int bits; 110 int len; 111 struct sockaddr_in net; 112 113 for (tst = 1, bits = 32; tst; tst <<= 1, bits--) 114 if (msk & tst) 115 break; 116 117 for (tst <<= 1; tst; tst <<= 1) 118 if (!(msk & tst)) 119 break; 120 121 net.sin_addr.s_addr = ihost4->sin_addr.s_addr & mask4->sin_addr.s_addr; 122 strcpy(buf, inet_ntoa(net.sin_addr)); 123 for (len = strlen(buf); len > 3; buf[len -= 2] = '\0') 124 if (strcmp(buf + len - 2, ".0")) 125 break; 126 127 if (tst) /* non-contiguous :-( */ 128 sprintf(buf + strlen(buf),"&0x%08lx", (u_long)msk); 129 else 130 sprintf(buf + strlen(buf), "/%d", bits); 131 } 132 break; 133 134 case AF_LINK: 135 if (dl->sdl_nlen) 136 snprintf(buf, sizeof buf, "%.*s", dl->sdl_nlen, dl->sdl_data); 137 else if (dl->sdl_alen) { 138 if (dl->sdl_type == IFT_ETHER) { 139 if (dl->sdl_alen < sizeof buf / 3) { 140 int f; 141 u_char *MAC; 142 143 MAC = (u_char *)dl->sdl_data + dl->sdl_nlen; 144 for (f = 0; f < dl->sdl_alen; f++) 145 sprintf(buf+f*3, "%02x:", MAC[f]); 146 buf[f*3-1] = '\0'; 147 } else 148 strcpy(buf, "??:??:??:??:??:??"); 149 } else 150 sprintf(buf, "<IFT type %d>", dl->sdl_type); 151 } else if (dl->sdl_slen) 152 sprintf(buf, "<slen %d?>", dl->sdl_slen); 153 else 154 sprintf(buf, "link#%d", dl->sdl_index); 155 break; 156 157#ifndef NOINET6 158 case AF_INET6: 159 if (!phost) 160 buf[0] = '\0'; 161 else { 162 const u_char masks[] = { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe }; 163 struct sockaddr_in6 *ihost6 = (struct sockaddr_in6 *)phost; 164 struct sockaddr_in6 *mask6 = (struct sockaddr_in6 *)pmask; 165 int masklen, len; 166 const u_char *c; 167 168 /* XXX: ?????!?!?!!!!! This is horrible ! */ 169 if (IN6_IS_ADDR_LINKLOCAL(&ihost6->sin6_addr) || 170 IN6_IS_ADDR_MC_LINKLOCAL(&ihost6->sin6_addr)) { 171 ihost6->sin6_scope_id = 172 ntohs(*(u_short *)&ihost6->sin6_addr.s6_addr[2]); 173 *(u_short *)&ihost6->sin6_addr.s6_addr[2] = 0; 174 } 175 176 if (mask6) { 177 const u_char *p, *end; 178 179 p = (const u_char *)&mask6->sin6_addr; 180 end = p + 16; 181 for (masklen = 0, end = p + 16; p < end && *p == 0xff; p++) 182 masklen += 8; 183 184 if (p < end) { 185 for (c = masks; c < masks + sizeof masks; c++) 186 if (*c == *p) { 187 masklen += c - masks; 188 break; 189 } 190 } 191 } else 192 masklen = 128; 193 194 if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&ihost6->sin6_addr)) 195 snprintf(buf, sizeof buf, "default"); 196 else { 197 getnameinfo(phost, ihost6->sin6_len, buf, sizeof buf, 198 NULL, 0, NI_WITHSCOPEID | NI_NUMERICHOST); 199 if (mask6 && (len = strlen(buf)) < sizeof buf - 1) 200 snprintf(buf + len, sizeof buf - len, "/%d", masklen); 201 } 202 } 203 break; 204#endif 205 206 default: 207 sprintf(buf, "<AF type %d>", phost->sa_family); 208 break; 209 } 210 211 prompt_Printf(prompt, "%-*s ", width-1, buf); 212} 213 214static struct bits { 215 u_int32_t b_mask; 216 char b_val; 217} bits[] = { 218 { RTF_UP, 'U' }, 219 { RTF_GATEWAY, 'G' }, 220 { RTF_HOST, 'H' }, 221 { RTF_REJECT, 'R' }, 222 { RTF_DYNAMIC, 'D' }, 223 { RTF_MODIFIED, 'M' }, 224 { RTF_DONE, 'd' }, 225 { RTF_CLONING, 'C' }, 226 { RTF_XRESOLVE, 'X' }, 227 { RTF_LLINFO, 'L' }, 228 { RTF_STATIC, 'S' }, 229 { RTF_PROTO1, '1' }, 230 { RTF_PROTO2, '2' }, 231 { RTF_BLACKHOLE, 'B' }, 232#ifdef RTF_WASCLONED 233 { RTF_WASCLONED, 'W' }, 234#endif 235#ifdef RTF_PRCLONING 236 { RTF_PRCLONING, 'c' }, 237#endif 238#ifdef RTF_PROTO3 239 { RTF_PROTO3, '3' }, 240#endif 241#ifdef RTF_BROADCAST 242 { RTF_BROADCAST, 'b' }, 243#endif 244 { 0, '\0' } 245}; 246 247#ifndef RTF_WASCLONED 248#define RTF_WASCLONED (0) 249#endif 250 251static void 252p_flags(struct prompt *prompt, u_int32_t f, int max) 253{ 254 char name[33], *flags; 255 register struct bits *p = bits; 256 257 if (max > sizeof name - 1) 258 max = sizeof name - 1; 259 260 for (flags = name; p->b_mask && flags - name < max; p++) 261 if (p->b_mask & f) 262 *flags++ = p->b_val; 263 *flags = '\0'; 264 prompt_Printf(prompt, "%-*.*s", max, max, name); 265} 266 267const char * 268Index2Nam(int idx) 269{ 270 /* 271 * XXX: Maybe we should select() on the routing socket so that we can 272 * notice interfaces that come & go (PCCARD support). 273 * Or we could even support a signal that resets these so that 274 * the PCCARD insert/remove events can signal ppp. 275 */ 276 static char **ifs; /* Figure these out once */ 277 static int nifs, debug_done; /* Figure out how many once, and debug once */ 278 279 if (idx > nifs || (idx > 0 && ifs[idx-1] == NULL)) { 280 int mib[6], have, had; 281 size_t needed; 282 char *buf, *ptr, *end; 283 struct sockaddr_dl *dl; 284 struct if_msghdr *ifm; 285 286 if (ifs) { 287 free(ifs); 288 ifs = NULL; 289 nifs = 0; 290 } 291 debug_done = 0; 292 293 mib[0] = CTL_NET; 294 mib[1] = PF_ROUTE; 295 mib[2] = 0; 296 mib[3] = 0; 297 mib[4] = NET_RT_IFLIST; 298 mib[5] = 0; 299 300 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) { 301 log_Printf(LogERROR, "Index2Nam: sysctl: estimate: %s\n", 302 strerror(errno)); 303 return NumStr(idx, NULL, 0); 304 } 305 if ((buf = malloc(needed)) == NULL) 306 return NumStr(idx, NULL, 0); 307 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) { 308 free(buf); 309 return NumStr(idx, NULL, 0); 310 } 311 end = buf + needed; 312 313 have = 0; 314 for (ptr = buf; ptr < end; ptr += ifm->ifm_msglen) { 315 ifm = (struct if_msghdr *)ptr; 316 if (ifm->ifm_type != RTM_IFINFO) 317 continue; 318 dl = (struct sockaddr_dl *)(ifm + 1); 319 if (ifm->ifm_index > 0) { 320 if (ifm->ifm_index > have) { 321 char **newifs; 322 323 had = have; 324 have = ifm->ifm_index + 5; 325 if (had) 326 newifs = (char **)realloc(ifs, sizeof(char *) * have); 327 else 328 newifs = (char **)malloc(sizeof(char *) * have); 329 if (!newifs) { 330 log_Printf(LogDEBUG, "Index2Nam: %s\n", strerror(errno)); 331 nifs = 0; 332 if (ifs) { 333 free(ifs); 334 ifs = NULL; 335 } 336 free(buf); 337 return NumStr(idx, NULL, 0); 338 } 339 ifs = newifs; 340 memset(ifs + had, '\0', sizeof(char *) * (have - had)); 341 } 342 if (ifs[ifm->ifm_index-1] == NULL) { 343 ifs[ifm->ifm_index-1] = (char *)malloc(dl->sdl_nlen+1); 344 memcpy(ifs[ifm->ifm_index-1], dl->sdl_data, dl->sdl_nlen); 345 ifs[ifm->ifm_index-1][dl->sdl_nlen] = '\0'; 346 if (nifs < ifm->ifm_index) 347 nifs = ifm->ifm_index; 348 } 349 } else if (log_IsKept(LogDEBUG)) 350 log_Printf(LogDEBUG, "Skipping out-of-range interface %d!\n", 351 ifm->ifm_index); 352 } 353 free(buf); 354 } 355 356 if (log_IsKept(LogDEBUG) && !debug_done) { 357 int f; 358 359 log_Printf(LogDEBUG, "Found the following interfaces:\n"); 360 for (f = 0; f < nifs; f++) 361 if (ifs[f] != NULL) 362 log_Printf(LogDEBUG, " Index %d, name \"%s\"\n", f+1, ifs[f]); 363 debug_done = 1; 364 } 365 366 if (idx < 1 || idx > nifs || ifs[idx-1] == NULL) 367 return NumStr(idx, NULL, 0); 368 369 return ifs[idx-1]; 370} 371 372void 373route_ParseHdr(struct rt_msghdr *rtm, struct sockaddr *sa[RTAX_MAX]) 374{ 375 char *wp; 376 int rtax; 377 378 wp = (char *)(rtm + 1); 379 380 for (rtax = 0; rtax < RTAX_MAX; rtax++) 381 if (rtm->rtm_addrs & (1 << rtax)) { 382 sa[rtax] = (struct sockaddr *)wp; 383 wp += ROUNDUP(sa[rtax]->sa_len); 384 } else 385 sa[rtax] = NULL; 386} 387 388int 389route_Show(struct cmdargs const *arg) 390{ 391 struct rt_msghdr *rtm; 392 struct sockaddr *sa[RTAX_MAX]; 393 char *sp, *ep, *cp; 394 size_t needed; 395 int mib[6]; 396 397 mib[0] = CTL_NET; 398 mib[1] = PF_ROUTE; 399 mib[2] = 0; 400 mib[3] = 0; 401 mib[4] = NET_RT_DUMP; 402 mib[5] = 0; 403 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) { 404 log_Printf(LogERROR, "route_Show: sysctl: estimate: %s\n", strerror(errno)); 405 return (1); 406 } 407 sp = malloc(needed); 408 if (sp == NULL) 409 return (1); 410 if (sysctl(mib, 6, sp, &needed, NULL, 0) < 0) { 411 log_Printf(LogERROR, "route_Show: sysctl: getroute: %s\n", strerror(errno)); 412 free(sp); 413 return (1); 414 } 415 ep = sp + needed; 416 417 prompt_Printf(arg->prompt, "%-20s%-20sFlags Netif\n", 418 "Destination", "Gateway"); 419 for (cp = sp; cp < ep; cp += rtm->rtm_msglen) { 420 rtm = (struct rt_msghdr *)cp; 421 422 route_ParseHdr(rtm, sa); 423 424 if (sa[RTAX_DST] && sa[RTAX_GATEWAY]) { 425 p_sockaddr(arg->prompt, sa[RTAX_DST], sa[RTAX_NETMASK], 20); 426 p_sockaddr(arg->prompt, sa[RTAX_GATEWAY], NULL, 20); 427 428 p_flags(arg->prompt, rtm->rtm_flags, 6); 429 prompt_Printf(arg->prompt, " %s\n", Index2Nam(rtm->rtm_index)); 430 } else 431 prompt_Printf(arg->prompt, "<can't parse routing entry>\n"); 432 } 433 free(sp); 434 return 0; 435} 436 437/* 438 * Delete routes associated with our interface 439 */ 440void 441route_IfDelete(struct bundle *bundle, int all) 442{ 443 struct rt_msghdr *rtm; 444 struct sockaddr *sa[RTAX_MAX]; 445 struct sockaddr_in **in; 446 struct in_addr sa_none; 447 int pass; 448 size_t needed; 449 char *sp, *cp, *ep; 450 int mib[6]; 451 452 log_Printf(LogDEBUG, "route_IfDelete (%d)\n", bundle->iface->index); 453 sa_none.s_addr = INADDR_ANY; 454 in = (struct sockaddr_in **)sa; 455 456 mib[0] = CTL_NET; 457 mib[1] = PF_ROUTE; 458 mib[2] = 0; 459 mib[3] = 0; 460 mib[4] = NET_RT_DUMP; 461 mib[5] = 0; 462 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) { 463 log_Printf(LogERROR, "route_IfDelete: sysctl: estimate: %s\n", 464 strerror(errno)); 465 return; 466 } 467 468 sp = malloc(needed); 469 if (sp == NULL) 470 return; 471 472 if (sysctl(mib, 6, sp, &needed, NULL, 0) < 0) { 473 log_Printf(LogERROR, "route_IfDelete: sysctl: getroute: %s\n", 474 strerror(errno)); 475 free(sp); 476 return; 477 } 478 ep = sp + needed; 479 480 for (pass = 0; pass < 2; pass++) { 481 /* 482 * We do 2 passes. The first deletes all cloned routes. The second 483 * deletes all non-cloned routes. This is done to avoid 484 * potential errors from trying to delete route X after route Y where 485 * route X was cloned from route Y (and is no longer there 'cos it 486 * may have gone with route Y). 487 */ 488 if (RTF_WASCLONED == 0 && pass == 0) 489 /* So we can't tell ! */ 490 continue; 491 for (cp = sp; cp < ep; cp += rtm->rtm_msglen) { 492 rtm = (struct rt_msghdr *)cp; 493 route_ParseHdr(rtm, sa); 494 if (sa[RTAX_DST]) { 495 log_Printf(LogDEBUG, "route_IfDelete: addrs: %x, Netif: %d (%s)," 496 " flags: %x, dst: %s ?\n", rtm->rtm_addrs, rtm->rtm_index, 497 Index2Nam(rtm->rtm_index), rtm->rtm_flags, 498 inet_ntoa(((struct sockaddr_in *)sa[RTAX_DST])->sin_addr)); 499 if (sa[RTAX_GATEWAY] && rtm->rtm_index == bundle->iface->index && 500 (all || (rtm->rtm_flags & RTF_GATEWAY))) { 501 if (sa[RTAX_GATEWAY]->sa_family == AF_INET || 502 sa[RTAX_GATEWAY]->sa_family == AF_LINK) { 503 if ((pass == 0 && (rtm->rtm_flags & RTF_WASCLONED)) || 504 (pass == 1 && !(rtm->rtm_flags & RTF_WASCLONED))) { 505 log_Printf(LogDEBUG, "route_IfDelete: Remove it (pass %d)\n", 506 pass); 507 bundle_SetRoute(bundle, RTM_DELETE, in[RTAX_DST]->sin_addr, 508 sa_none, sa_none, 0, 0); 509 } else 510 log_Printf(LogDEBUG, "route_IfDelete: Skip it (pass %d)\n", pass); 511 } else 512 log_Printf(LogDEBUG, 513 "route_IfDelete: Can't remove routes of %d family !\n", 514 sa[RTAX_GATEWAY]->sa_family); 515 } 516 } 517 } 518 } 519 free(sp); 520} 521 522int 523GetIfIndex(char *name) 524{ 525 int idx; 526 const char *got; 527 528 idx = 1; 529 while (strcmp(got = Index2Nam(idx), "???")) 530 if (!strcmp(got, name)) 531 return idx; 532 else 533 idx++; 534 return -1; 535} 536 537void 538route_Change(struct bundle *bundle, struct sticky_route *r, 539 struct in_addr me, struct in_addr peer) 540{ 541 struct in_addr none, del; 542 543 none.s_addr = INADDR_ANY; 544 for (; r; r = r->next) { 545 if ((r->type & ROUTE_DSTMYADDR) && r->dst.s_addr != me.s_addr) { 546 del.s_addr = r->dst.s_addr & r->mask.s_addr; 547 bundle_SetRoute(bundle, RTM_DELETE, del, none, none, 1, 0); 548 r->dst = me; 549 if (r->type & ROUTE_GWHISADDR) 550 r->gw = peer; 551 } else if ((r->type & ROUTE_DSTHISADDR) && r->dst.s_addr != peer.s_addr) { 552 del.s_addr = r->dst.s_addr & r->mask.s_addr; 553 bundle_SetRoute(bundle, RTM_DELETE, del, none, none, 1, 0); 554 r->dst = peer; 555 if (r->type & ROUTE_GWHISADDR) 556 r->gw = peer; 557 } else if ((r->type & ROUTE_GWHISADDR) && r->gw.s_addr != peer.s_addr) 558 r->gw = peer; 559 bundle_SetRoute(bundle, RTM_ADD, r->dst, r->gw, r->mask, 1, 0); 560 } 561} 562 563void 564route_Clean(struct bundle *bundle, struct sticky_route *r) 565{ 566 struct in_addr none, del; 567 568 none.s_addr = INADDR_ANY; 569 for (; r; r = r->next) { 570 del.s_addr = r->dst.s_addr & r->mask.s_addr; 571 bundle_SetRoute(bundle, RTM_DELETE, del, none, none, 1, 0); 572 } 573} 574 575void 576route_Add(struct sticky_route **rp, int type, struct in_addr dst, 577 struct in_addr mask, struct in_addr gw) 578{ 579 struct sticky_route *r; 580 int dsttype = type & ROUTE_DSTANY; 581 582 r = NULL; 583 while (*rp) { 584 if ((dsttype && dsttype == ((*rp)->type & ROUTE_DSTANY)) || 585 (!dsttype && (*rp)->dst.s_addr == dst.s_addr)) { 586 /* Oops, we already have this route - unlink it */ 587 free(r); /* impossible really */ 588 r = *rp; 589 *rp = r->next; 590 } else 591 rp = &(*rp)->next; 592 } 593 594 if (!r) 595 r = (struct sticky_route *)malloc(sizeof(struct sticky_route)); 596 r->type = type; 597 r->next = NULL; 598 r->dst = dst; 599 r->mask = mask; 600 r->gw = gw; 601 *rp = r; 602} 603 604void 605route_Delete(struct sticky_route **rp, int type, struct in_addr dst) 606{ 607 struct sticky_route *r; 608 int dsttype = type & ROUTE_DSTANY; 609 610 for (; *rp; rp = &(*rp)->next) { 611 if ((dsttype && dsttype == ((*rp)->type & ROUTE_DSTANY)) || 612 (!dsttype && dst.s_addr == ((*rp)->dst.s_addr & (*rp)->mask.s_addr))) { 613 r = *rp; 614 *rp = r->next; 615 free(r); 616 break; 617 } 618 } 619} 620 621void 622route_DeleteAll(struct sticky_route **rp) 623{ 624 struct sticky_route *r, *rn; 625 626 for (r = *rp; r; r = rn) { 627 rn = r->next; 628 free(r); 629 } 630 *rp = NULL; 631} 632 633void 634route_ShowSticky(struct prompt *p, struct sticky_route *r, const char *tag, 635 int indent) 636{ 637 int def; 638 int tlen = strlen(tag); 639 640 if (tlen + 2 > indent) 641 prompt_Printf(p, "%s:\n%*s", tag, indent, ""); 642 else 643 prompt_Printf(p, "%s:%*s", tag, indent - tlen - 1, ""); 644 645 for (; r; r = r->next) { 646 def = r->dst.s_addr == INADDR_ANY && r->mask.s_addr == INADDR_ANY; 647 648 prompt_Printf(p, "%*sadd ", tlen ? 0 : indent, ""); 649 tlen = 0; 650 if (r->type & ROUTE_DSTMYADDR) 651 prompt_Printf(p, "MYADDR"); 652 else if (r->type & ROUTE_DSTHISADDR) 653 prompt_Printf(p, "HISADDR"); 654 else if (!def) 655 prompt_Printf(p, "%s", inet_ntoa(r->dst)); 656 657 if (def) 658 prompt_Printf(p, "default "); 659 else 660 prompt_Printf(p, " %s ", inet_ntoa(r->mask)); 661 662 if (r->type & ROUTE_GWHISADDR) 663 prompt_Printf(p, "HISADDR\n"); 664 else 665 prompt_Printf(p, "%s\n", inet_ntoa(r->gw)); 666 } 667} 668