1/*- 2 * Copyright (c) 1998 Brian Somers <brian@Awfulhak.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 9 unchanged lines hidden (view full) --- 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * |
26 * $FreeBSD: head/usr.sbin/ppp/iface.c 81634 2001-08-14 16:05:52Z brian $ |
27 */ 28 29#include <sys/param.h> 30#include <sys/socket.h> 31#include <netinet/in.h> 32#include <net/if.h> 33#include <net/if_dl.h> |
34#include <net/if_var.h> |
35#include <net/route.h> 36#include <arpa/inet.h> 37#include <netinet/in_systm.h> |
38#include <netinet/in_var.h> |
39#include <netinet/ip.h> |
40#ifndef NOINET6 41#include <netinet6/nd6.h> 42#endif |
43#include <sys/un.h> 44 45#include <errno.h> 46#include <string.h> 47#include <stdio.h> 48#include <stdlib.h> 49#include <sys/ioctl.h> 50#include <sys/sysctl.h> --- 9 unchanged lines hidden (view full) --- 60#include "timer.h" 61#include "fsm.h" 62#include "iplist.h" 63#include "lqr.h" 64#include "hdlc.h" 65#include "throughput.h" 66#include "slcompress.h" 67#include "descriptor.h" |
68#include "ncpaddr.h" 69#include "ip.h" |
70#include "ipcp.h" 71#include "filter.h" 72#include "lcp.h" 73#include "ccp.h" 74#include "link.h" 75#include "mp.h" 76#ifndef NORADIUS 77#include "radius.h" 78#endif |
79#include "ipv6cp.h" 80#include "ncp.h" |
81#include "bundle.h" 82#include "prompt.h" 83#include "iface.h" 84 85 |
86struct iface * 87iface_Create(const char *name) 88{ |
89 int mib[6], maxtries, err; |
90 size_t needed, namelen; 91 char *buf, *ptr, *end; 92 struct if_msghdr *ifm; 93 struct ifa_msghdr *ifam; 94 struct sockaddr_dl *dl; 95 struct sockaddr *sa[RTAX_MAX]; 96 struct iface *iface; 97 struct iface_addr *addr; 98 |
99 mib[0] = CTL_NET; 100 mib[1] = PF_ROUTE; 101 mib[2] = 0; 102 mib[3] = 0; 103 mib[4] = NET_RT_IFLIST; 104 mib[5] = 0; 105 106 maxtries = 20; 107 err = 0; 108 do { 109 if (maxtries-- == 0 || (err && err != ENOMEM)) { 110 fprintf(stderr, "iface_Create: sysctl: %s\n", strerror(err)); |
111 return NULL; 112 } 113 114 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) { 115 fprintf(stderr, "iface_Create: sysctl: estimate: %s\n", 116 strerror(errno)); |
117 return NULL; 118 } 119 120 if ((buf = (char *)malloc(needed)) == NULL) { 121 fprintf(stderr, "iface_Create: malloc failed: %s\n", strerror(errno)); |
122 return NULL; 123 } 124 125 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) { 126 err = errno; 127 free(buf); 128 buf = NULL; 129 } --- 14 unchanged lines hidden (view full) --- 144 if (iface == NULL) { 145 fprintf(stderr, "iface_Create: malloc: %s\n", strerror(errno)); 146 return NULL; 147 } 148 iface->name = strdup(name); 149 iface->index = ifm->ifm_index; 150 iface->flags = ifm->ifm_flags; 151 iface->mtu = 0; |
152 iface->addrs = 0; 153 iface->addr = NULL; |
154 } 155 ptr += ifm->ifm_msglen; /* First ifa_msghdr */ 156 for (; ptr < end; ptr += ifam->ifam_msglen) { 157 ifam = (struct ifa_msghdr *)ptr; /* Next if address */ 158 159 if (ifam->ifam_type != RTM_NEWADDR) /* finished this if */ 160 break; 161 162 if (iface != NULL && ifam->ifam_addrs & RTA_IFA) { 163 /* Found a configured interface ! */ 164 iface_ParseHdr(ifam, sa); 165 |
166 if (sa[RTAX_IFA] && (sa[RTAX_IFA]->sa_family == AF_INET 167#ifndef NOINET6 168 || sa[RTAX_IFA]->sa_family == AF_INET6 169#endif 170 )) { |
171 /* Record the address */ 172 |
173 addr = (struct iface_addr *) 174 realloc(iface->addr, (iface->addrs + 1) * sizeof iface->addr[0]); |
175 if (addr == NULL) 176 break; |
177 iface->addr = addr; |
178 |
179 addr += iface->addrs; 180 iface->addrs++; |
181 |
182 ncprange_setsa(&addr->ifa, sa[RTAX_IFA], sa[RTAX_NETMASK]); |
183 if (sa[RTAX_BRD]) |
184 ncpaddr_setsa(&addr->peer, sa[RTAX_BRD]); |
185 else |
186 ncpaddr_init(&addr->peer); |
187 } 188 } 189 } 190 } 191 192 free(buf); |
193 194 return iface; 195} 196 |
197static int 198iface_addr_Zap(const char *name, struct iface_addr *addr, int s) 199{ 200 struct ifaliasreq ifra; 201#ifndef NOINET6 202 struct in6_aliasreq ifra6; 203#endif 204 struct sockaddr_in *me4, *msk4, *peer4; 205 struct sockaddr_storage ssme, sspeer, ssmsk; 206 int res; 207 208 ncprange_getsa(&addr->ifa, &ssme, &ssmsk); 209 ncpaddr_getsa(&addr->peer, &sspeer); 210 res = 0; 211 212 switch (ncprange_family(&addr->ifa)) { 213 case AF_INET: 214 memset(&ifra, '\0', sizeof ifra); 215 strncpy(ifra.ifra_name, name, sizeof ifra.ifra_name - 1); 216 217 me4 = (struct sockaddr_in *)&ifra.ifra_addr; 218 memcpy(me4, &ssme, sizeof *me4); 219 220 msk4 = (struct sockaddr_in *)&ifra.ifra_mask; 221 memcpy(msk4, &ssmsk, sizeof *msk4); 222 223 peer4 = (struct sockaddr_in *)&ifra.ifra_broadaddr; 224 if (ncpaddr_family(&addr->peer) == AF_UNSPEC) { 225 peer4->sin_family = AF_INET; 226 peer4->sin_len = sizeof(*peer4); 227 peer4->sin_addr.s_addr = INADDR_NONE; 228 } else 229 memcpy(peer4, &sspeer, sizeof *peer4); 230 231 res = ID0ioctl(s, SIOCDIFADDR, &ifra); 232 break; 233 234#ifndef NOINET6 235 case AF_INET6: 236 memset(&ifra6, '\0', sizeof ifra6); 237 strncpy(ifra6.ifra_name, name, sizeof ifra6.ifra_name - 1); 238 239 memcpy(&ifra6.ifra_addr, &ssme, sizeof ifra6.ifra_addr); 240 memcpy(&ifra6.ifra_prefixmask, &ssmsk, sizeof ifra6.ifra_prefixmask); 241 ifra6.ifra_prefixmask.sin6_family = AF_UNSPEC; 242 if (ncpaddr_family(&addr->peer) == AF_UNSPEC) 243 ifra6.ifra_dstaddr.sin6_family = AF_UNSPEC; 244 else 245 memcpy(&ifra6.ifra_dstaddr, &sspeer, sizeof ifra6.ifra_dstaddr); 246 ifra6.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME; 247 ifra6.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME; 248 249 res = ID0ioctl(s, SIOCDIFADDR_IN6, &ifra6); 250 break; 251#endif 252 } 253 254 if (res == -1) { 255 char dst[40]; 256 const char *end = 257#ifndef NOINET6 258 ncprange_family(&addr->ifa) == AF_INET6 ? "_IN6" : 259#endif 260 ""; 261 262 if (ncpaddr_family(&addr->peer) == AF_UNSPEC) 263 log_Printf(LogWARN, "iface rm: ioctl(SIOCDIFADDR%s, %s): %s\n", 264 end, ncprange_ntoa(&addr->ifa), strerror(errno)); 265 else { 266 snprintf(dst, sizeof dst, "%s", ncpaddr_ntoa(&addr->peer)); 267 log_Printf(LogWARN, "iface rm: ioctl(SIOCDIFADDR%s, %s -> %s): %s\n", 268 end, ncprange_ntoa(&addr->ifa), dst, strerror(errno)); 269 } 270 } 271 272 return res != -1; 273} 274 |
275static void |
276iface_addr_Add(const char *name, struct iface_addr *addr, int s) |
277{ 278 struct ifaliasreq ifra; |
279#ifndef NOINET6 280 struct in6_aliasreq ifra6; 281#endif 282 struct sockaddr_in *me4, *msk4, *peer4; 283 struct sockaddr_storage ssme, sspeer, ssmsk; 284 int res; |
285 |
286 ncprange_getsa(&addr->ifa, &ssme, &ssmsk); 287 ncpaddr_getsa(&addr->peer, &sspeer); 288 res = 0; 289 290 switch (ncprange_family(&addr->ifa)) { 291 case AF_INET: |
292 memset(&ifra, '\0', sizeof ifra); 293 strncpy(ifra.ifra_name, name, sizeof ifra.ifra_name - 1); |
294 295 me4 = (struct sockaddr_in *)&ifra.ifra_addr; 296 memcpy(me4, &ssme, sizeof *me4); 297 298 msk4 = (struct sockaddr_in *)&ifra.ifra_mask; 299 memcpy(msk4, &ssmsk, sizeof *msk4); 300 301 peer4 = (struct sockaddr_in *)&ifra.ifra_broadaddr; 302 if (ncpaddr_family(&addr->peer) == AF_UNSPEC) { 303 peer4->sin_family = AF_INET; 304 peer4->sin_len = sizeof(*peer4); 305 peer4->sin_addr.s_addr = INADDR_NONE; 306 } else 307 memcpy(peer4, &sspeer, sizeof *peer4); 308 309 res = ID0ioctl(s, SIOCAIFADDR, &ifra); 310 break; 311 312#ifndef NOINET6 313 case AF_INET6: 314 memset(&ifra6, '\0', sizeof ifra6); 315 strncpy(ifra6.ifra_name, name, sizeof ifra6.ifra_name - 1); 316 317 memcpy(&ifra6.ifra_addr, &ssme, sizeof ifra6.ifra_addr); 318 memcpy(&ifra6.ifra_prefixmask, &ssmsk, sizeof ifra6.ifra_prefixmask); 319 if (ncpaddr_family(&addr->peer) == AF_UNSPEC) 320 ifra6.ifra_dstaddr.sin6_family = AF_UNSPEC; 321 else 322 memcpy(&ifra6.ifra_dstaddr, &sspeer, sizeof ifra6.ifra_dstaddr); 323 ifra6.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME; 324 ifra6.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME; 325 326 res = ID0ioctl(s, SIOCAIFADDR_IN6, &ifra6); 327 break; 328#endif |
329 } |
330 331 if (res == -1) { 332 char dst[40]; 333 const char *end = 334#ifndef NOINET6 335 ncprange_family(&addr->ifa) == AF_INET6 ? "_IN6" : 336#endif 337 ""; 338 339 if (ncpaddr_family(&addr->peer) == AF_UNSPEC) 340 log_Printf(LogWARN, "iface add: ioctl(SIOCAIFADDR%s, %s): %s\n", 341 end, ncprange_ntoa(&addr->ifa), strerror(errno)); 342 else { 343 snprintf(dst, sizeof dst, "%s", ncpaddr_ntoa(&addr->peer)); 344 log_Printf(LogWARN, "iface add: ioctl(SIOCDIFADDR%s, %s -> %s): %s\n", 345 end, ncprange_ntoa(&addr->ifa), dst, strerror(errno)); 346 } 347 } |
348} 349 |
350 |
351void |
352iface_Clear(struct iface *iface, struct ncp *ncp, int family, int how) |
353{ |
354 int addrs, af, inskip, in6skip, n, s4 = -1, s6 = -1, *s; |
355 |
356 if (iface->addrs) { 357 inskip = in6skip = how == IFACE_CLEAR_ALL ? 0 : 1; 358 addrs = 0; |
359 |
360 for (n = 0; n < iface->addrs; n++) { 361 af = ncprange_family(&iface->addr[n].ifa); 362 if (family == 0 || family == af) { 363 if (!iface->addr[n].system && (how & IFACE_SYSTEM)) 364 continue; 365 switch (af) { 366 case AF_INET: 367 if (inskip) { 368 inskip = 0; 369 continue; 370 } 371 s = &s4; 372 break; 373 374#ifndef NOINET6 375 case AF_INET6: 376 if (in6skip) { 377 in6skip = 0; 378 continue; 379 } 380 s = &s6; 381 break; 382#endif 383 } 384 385 if (*s == -1 && (*s = ID0socket(af, SOCK_DGRAM, 0)) == -1) 386 log_Printf(LogERROR, "iface_Clear: socket(): %s\n", strerror(errno)); 387 else if (iface_addr_Zap(iface->name, iface->addr + n, *s)) { 388 ncp_IfaceAddrDeleted(ncp, iface->addr + n); 389 bcopy(iface->addr + n + 1, iface->addr + n, 390 (iface->addrs - n - 1) * sizeof *iface->addr); 391 iface->addrs--; 392 n--; 393 } 394 } 395 } 396 |
397 /* Don't bother realloc()ing - we have little to gain */ |
398 399 if (s4) 400 close(s4); 401 if (s6) 402 close(s6); |
403 } 404} 405 406int |
407iface_Add(struct iface *iface, struct ncp *ncp, const struct ncprange *ifa, 408 const struct ncpaddr *peer, int how) |
409{ |
410 int af, n, s, width; 411 struct ncpaddr ifaddr, ncplocal; |
412 struct iface_addr *addr; 413 |
414 af = ncprange_family(ifa); 415 if ((s = ID0socket(af, SOCK_DGRAM, 0)) == -1) { 416 log_Printf(LogERROR, "iface_Add: socket(): %s\n", strerror(errno)); |
417 return 0; 418 } |
419 ncprange_getaddr(ifa, &ncplocal); |
420 |
421 for (n = 0; n < iface->addrs; n++) { 422 if (ncprange_contains(&iface->addr[n].ifa, &ncplocal)) { 423 if (!(how & IFACE_FORCE_ADD)) { 424 close(s); 425 return 0; /* errno = EEXIST; */ |
426 } |
427 428 if (ncprange_equal(&iface->addr[n].ifa, ifa) && 429 ncpaddr_equal(&iface->addr[n].peer, peer)) { 430 close(s); 431 return 1; /* Already there */ |
432 } 433 |
434 width = 435#ifndef NOINET6 436 (af == AF_INET6) ? 128 : 437#endif 438 32; 439 iface_addr_Zap(iface->name, iface->addr + n, s); 440 ncprange_setwidth(&iface->addr[n].ifa, width); 441 ncprange_getaddr(&iface->addr[n].ifa, &ifaddr); 442 if (ncpaddr_equal(&ifaddr, &ncplocal)) 443 ncpaddr_copy(&iface->addr[n].peer, peer); 444 else 445 ncpaddr_init(&iface->addr[n].peer); 446 iface_addr_Add(iface->name, iface->addr + n, s); 447 if (ncpaddr_equal(&ifaddr, &ncplocal)) { 448 close(s); 449 ncp_IfaceAddrAdded(ncp, iface->addr + n); 450 return 1; |
451 } 452 } 453 } 454 |
455 addr = (struct iface_addr *)realloc 456 (iface->addr, (iface->addrs + 1) * sizeof iface->addr[0]); 457 if (addr == NULL) { 458 log_Printf(LogERROR, "iface_inAdd: realloc: %s\n", strerror(errno)); 459 close(s); 460 return 0; |
461 } |
462 iface->addr = addr; |
463 |
464 if (how & IFACE_ADD_FIRST) { 465 /* Stuff it at the start of our list */ 466 n = 0; 467 bcopy(iface->addr, iface->addr + 1, iface->addrs * sizeof *iface->addr); 468 } else 469 n = iface->addrs; |
470 |
471 iface->addrs++; 472 ncprange_copy(&iface->addr[n].ifa, ifa); 473 ncpaddr_copy(&iface->addr[n].peer, peer); 474 iface->addr[n].system = !!(how & IFACE_SYSTEM); 475 iface_addr_Add(iface->name, iface->addr + n, s); |
476 |
477 close(s); 478 ncp_IfaceAddrAdded(ncp, iface->addr + n); |
479 |
480 return 1; 481} 482 483int |
484iface_Delete(struct iface *iface, struct ncp *ncp, const struct ncpaddr *del) |
485{ |
486 struct ncpaddr found; 487 int n, res, s; |
488 |
489 if ((s = ID0socket(ncpaddr_family(del), SOCK_DGRAM, 0)) == -1) { 490 log_Printf(LogERROR, "iface_Delete: socket(): %s\n", strerror(errno)); 491 return 0; 492 } 493 494 for (n = res = 0; n < iface->addrs; n++) { 495 ncprange_getaddr(&iface->addr[n].ifa, &found); 496 if (ncpaddr_equal(&found, del)) { 497 iface_addr_Zap(iface->name, iface->addr + n, s); 498 ncp_IfaceAddrDeleted(ncp, iface->addr + n); 499 bcopy(iface->addr + n + 1, iface->addr + n, 500 (iface->addrs - n - 1) * sizeof *iface->addr); 501 iface->addrs--; 502 res = 1; 503 break; |
504 } |
505 } |
506 |
507 close(s); 508 509 return res; |
510} 511 512#define IFACE_ADDFLAGS 1 513#define IFACE_DELFLAGS 2 514 515static int 516iface_ChangeFlags(const char *ifname, int flags, int how) 517{ --- 50 unchanged lines hidden (view full) --- 568 /* 569 * iface_Clear(iface, IFACE_CLEAR_ALL) must be called manually 570 * if that's what the user wants. It's better to leave the interface 571 * allocated so that existing connections can continue to work. 572 */ 573 574 if (iface != NULL) { 575 free(iface->name); |
576 free(iface->addr); |
577 free(iface); 578 } 579} 580 581#define if_entry(x) { IFF_##x, #x } 582 583struct { 584 int flag; --- 15 unchanged lines hidden (view full) --- 600 if_entry(LINK2), 601 if_entry(MULTICAST), 602 { 0, "???" } 603}; 604 605int 606iface_Show(struct cmdargs const *arg) 607{ |
608 struct ncpaddr ncpaddr; |
609 struct iface *iface = arg->bundle->iface, *current; 610 int f, flags; |
611#ifndef NOINET6 612 int scopeid, width; 613#endif 614 struct in_addr mask; |
615 616 current = iface_Create(iface->name); 617 flags = iface->flags = current->flags; 618 iface_Destroy(current); 619 620 prompt_Printf(arg->prompt, "%s (idx %d) <", iface->name, iface->index); 621 for (f = 0; f < sizeof if_flags / sizeof if_flags[0]; f++) 622 if ((if_flags[f].flag & flags) || (!if_flags[f].flag && flags)) { 623 prompt_Printf(arg->prompt, "%s%s", flags == iface->flags ? "" : ",", 624 if_flags[f].value); 625 flags &= ~if_flags[f].flag; 626 } 627 prompt_Printf(arg->prompt, "> mtu %d has %d address%s:\n", iface->mtu, |
628 iface->addrs, iface->addrs == 1 ? "" : "es"); |
629 |
630 for (f = 0; f < iface->addrs; f++) { 631 ncprange_getaddr(&iface->addr[f].ifa, &ncpaddr); 632 switch (ncprange_family(&iface->addr[f].ifa)) { 633 case AF_INET: 634 prompt_Printf(arg->prompt, " inet %s --> ", ncpaddr_ntoa(&ncpaddr)); 635 if (ncpaddr_family(&iface->addr[f].peer) == AF_UNSPEC) 636 prompt_Printf(arg->prompt, "255.255.255.255"); 637 else 638 prompt_Printf(arg->prompt, "%s", ncpaddr_ntoa(&iface->addr[f].peer)); 639 ncprange_getip4mask(&iface->addr[f].ifa, &mask); 640 prompt_Printf(arg->prompt, " netmask 0x%08lx", (long)ntohl(mask.s_addr)); 641 break; 642 643#ifndef NOINET6 644 case AF_INET6: 645 prompt_Printf(arg->prompt, " inet6 %s", ncpaddr_ntoa(&ncpaddr)); 646 if (ncpaddr_family(&iface->addr[f].peer) != AF_UNSPEC) 647 prompt_Printf(arg->prompt, " --> %s", 648 ncpaddr_ntoa(&iface->addr[f].peer)); 649 ncprange_getwidth(&iface->addr[f].ifa, &width); 650 prompt_Printf(arg->prompt, " prefixlen %d", width); 651 if ((scopeid = ncprange_scopeid(&iface->addr[f].ifa)) != -1) 652 prompt_Printf(arg->prompt, " scopeid 0x%x", (unsigned)scopeid); 653 break; 654#endif 655 } |
656 prompt_Printf(arg->prompt, "\n"); 657 } 658 659 return 0; 660} 661 662void 663iface_ParseHdr(struct ifa_msghdr *ifam, struct sockaddr *sa[RTAX_MAX]) --- 13 unchanged lines hidden --- |