2 * Copyright (c) 1998 Brian Somers <brian@Awfulhak.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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
26 * $FreeBSD: src/usr.sbin/ppp/iface.c,v 1.13.2.9 2003/04/29 16:04:41 ume Exp $
27 * $DragonFly: src/usr.sbin/ppp/iface.c,v 1.3 2004/02/03 07:11:47 dillon Exp $
30 #include <sys/param.h>
31 #include <sys/socket.h>
32 #include <netinet/in.h>
34 #include <net/if_dl.h>
36 #include <net/if_var.h>
38 #include <net/route.h>
39 #include <netinet/in_systm.h>
40 #include <netinet/in_var.h>
41 #include <netinet/ip.h>
43 #include <netinet6/nd6.h>
52 #include <sys/ioctl.h>
53 #include <sys/sysctl.h>
68 #include "throughput.h"
69 #include "slcompress.h"
70 #include "descriptor.h"
87 #define IN6MASK128 {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
88 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }}}
89 static const struct in6_addr in6mask128 = IN6MASK128;
93 iface_Create(const char *name)
95 int mib[6], maxtries, err;
96 size_t needed, namelen;
97 char *buf, *ptr, *end;
98 struct if_msghdr *ifm;
99 struct ifa_msghdr *ifam;
100 struct sockaddr_dl *dl;
101 struct sockaddr *sa[RTAX_MAX];
103 struct iface_addr *addr;
109 mib[4] = NET_RT_IFLIST;
115 if (maxtries-- == 0 || (err && err != ENOMEM)) {
116 fprintf(stderr, "iface_Create: sysctl: %s\n", strerror(err));
120 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) {
121 fprintf(stderr, "iface_Create: sysctl: estimate: %s\n",
126 if ((buf = (char *)malloc(needed)) == NULL) {
127 fprintf(stderr, "iface_Create: malloc failed: %s\n", strerror(errno));
131 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) {
136 } while (buf == NULL);
141 namelen = strlen(name);
143 while (ptr < end && iface == NULL) {
144 ifm = (struct if_msghdr *)ptr; /* On if_msghdr */
145 if (ifm->ifm_type != RTM_IFINFO)
147 dl = (struct sockaddr_dl *)(ifm + 1); /* Single _dl at end */
148 if (dl->sdl_nlen == namelen && !strncmp(name, dl->sdl_data, namelen)) {
149 iface = (struct iface *)malloc(sizeof *iface);
151 fprintf(stderr, "iface_Create: malloc: %s\n", strerror(errno));
154 iface->name = strdup(name);
155 iface->index = ifm->ifm_index;
156 iface->flags = ifm->ifm_flags;
161 ptr += ifm->ifm_msglen; /* First ifa_msghdr */
162 for (; ptr < end; ptr += ifam->ifam_msglen) {
163 ifam = (struct ifa_msghdr *)ptr; /* Next if address */
165 if (ifam->ifam_type != RTM_NEWADDR) /* finished this if */
168 if (iface != NULL && ifam->ifam_addrs & RTA_IFA) {
169 /* Found a configured interface ! */
170 iface_ParseHdr(ifam, sa);
172 if (sa[RTAX_IFA] && (sa[RTAX_IFA]->sa_family == AF_INET
174 || sa[RTAX_IFA]->sa_family == AF_INET6
177 /* Record the address */
179 addr = (struct iface_addr *)
180 realloc(iface->addr, (iface->addrs + 1) * sizeof iface->addr[0]);
185 addr += iface->addrs;
188 ncprange_setsa(&addr->ifa, sa[RTAX_IFA], sa[RTAX_NETMASK]);
190 ncpaddr_setsa(&addr->peer, sa[RTAX_BRD]);
192 ncpaddr_init(&addr->peer);
204 iface_addr_Zap(const char *name, struct iface_addr *addr, int s)
206 struct ifaliasreq ifra;
208 struct in6_aliasreq ifra6;
210 struct sockaddr_in *me4, *msk4, *peer4;
211 struct sockaddr_storage ssme, sspeer, ssmsk;
214 ncprange_getsa(&addr->ifa, &ssme, &ssmsk);
215 ncpaddr_getsa(&addr->peer, &sspeer);
218 switch (ncprange_family(&addr->ifa)) {
220 memset(&ifra, '\0', sizeof ifra);
221 strncpy(ifra.ifra_name, name, sizeof ifra.ifra_name - 1);
223 me4 = (struct sockaddr_in *)&ifra.ifra_addr;
224 memcpy(me4, &ssme, sizeof *me4);
226 msk4 = (struct sockaddr_in *)&ifra.ifra_mask;
227 memcpy(msk4, &ssmsk, sizeof *msk4);
229 peer4 = (struct sockaddr_in *)&ifra.ifra_broadaddr;
230 if (ncpaddr_family(&addr->peer) == AF_UNSPEC) {
231 peer4->sin_family = AF_INET;
232 peer4->sin_len = sizeof(*peer4);
233 peer4->sin_addr.s_addr = INADDR_NONE;
235 memcpy(peer4, &sspeer, sizeof *peer4);
237 res = ID0ioctl(s, SIOCDIFADDR, &ifra);
238 if (log_IsKept(LogDEBUG)) {
241 snprintf(buf, sizeof buf, "%s", ncprange_ntoa(&addr->ifa));
242 log_Printf(LogWARN, "%s: DIFADDR %s -> %s returns %d\n",
243 ifra.ifra_name, buf, ncpaddr_ntoa(&addr->peer), res);
249 memset(&ifra6, '\0', sizeof ifra6);
250 strncpy(ifra6.ifra_name, name, sizeof ifra6.ifra_name - 1);
252 memcpy(&ifra6.ifra_addr, &ssme, sizeof ifra6.ifra_addr);
253 memcpy(&ifra6.ifra_prefixmask, &ssmsk, sizeof ifra6.ifra_prefixmask);
254 ifra6.ifra_prefixmask.sin6_family = AF_UNSPEC;
255 if (ncpaddr_family(&addr->peer) == AF_UNSPEC)
256 ifra6.ifra_dstaddr.sin6_family = AF_UNSPEC;
258 memcpy(&ifra6.ifra_dstaddr, &sspeer, sizeof ifra6.ifra_dstaddr);
259 ifra6.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
260 ifra6.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
262 res = ID0ioctl(s, SIOCDIFADDR_IN6, &ifra6);
271 ncprange_family(&addr->ifa) == AF_INET6 ? "_IN6" :
275 if (ncpaddr_family(&addr->peer) == AF_UNSPEC)
276 log_Printf(LogWARN, "iface rm: ioctl(SIOCDIFADDR%s, %s): %s\n",
277 end, ncprange_ntoa(&addr->ifa), strerror(errno));
279 snprintf(dst, sizeof dst, "%s", ncpaddr_ntoa(&addr->peer));
280 log_Printf(LogWARN, "iface rm: ioctl(SIOCDIFADDR%s, %s -> %s): %s\n",
281 end, ncprange_ntoa(&addr->ifa), dst, strerror(errno));
289 iface_addr_Add(const char *name, struct iface_addr *addr, int s)
291 struct ifaliasreq ifra;
293 struct in6_aliasreq ifra6;
295 struct sockaddr_in *me4, *msk4, *peer4;
296 struct sockaddr_storage ssme, sspeer, ssmsk;
299 ncprange_getsa(&addr->ifa, &ssme, &ssmsk);
300 ncpaddr_getsa(&addr->peer, &sspeer);
303 switch (ncprange_family(&addr->ifa)) {
305 memset(&ifra, '\0', sizeof ifra);
306 strncpy(ifra.ifra_name, name, sizeof ifra.ifra_name - 1);
308 me4 = (struct sockaddr_in *)&ifra.ifra_addr;
309 memcpy(me4, &ssme, sizeof *me4);
311 msk4 = (struct sockaddr_in *)&ifra.ifra_mask;
312 memcpy(msk4, &ssmsk, sizeof *msk4);
314 peer4 = (struct sockaddr_in *)&ifra.ifra_broadaddr;
315 if (ncpaddr_family(&addr->peer) == AF_UNSPEC) {
316 peer4->sin_family = AF_INET;
317 peer4->sin_len = sizeof(*peer4);
318 peer4->sin_addr.s_addr = INADDR_NONE;
320 memcpy(peer4, &sspeer, sizeof *peer4);
322 res = ID0ioctl(s, SIOCAIFADDR, &ifra);
323 if (log_IsKept(LogDEBUG)) {
326 snprintf(buf, sizeof buf, "%s", ncprange_ntoa(&addr->ifa));
327 log_Printf(LogWARN, "%s: AIFADDR %s -> %s returns %d\n",
328 ifra.ifra_name, buf, ncpaddr_ntoa(&addr->peer), res);
334 memset(&ifra6, '\0', sizeof ifra6);
335 strncpy(ifra6.ifra_name, name, sizeof ifra6.ifra_name - 1);
337 memcpy(&ifra6.ifra_addr, &ssme, sizeof ifra6.ifra_addr);
338 memcpy(&ifra6.ifra_prefixmask, &ssmsk, sizeof ifra6.ifra_prefixmask);
339 if (ncpaddr_family(&addr->peer) == AF_UNSPEC)
340 ifra6.ifra_dstaddr.sin6_family = AF_UNSPEC;
341 else if (memcmp(&((struct sockaddr_in6 *)&ssmsk)->sin6_addr, &in6mask128,
342 sizeof in6mask128) == 0)
343 memcpy(&ifra6.ifra_dstaddr, &sspeer, sizeof ifra6.ifra_dstaddr);
344 ifra6.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
345 ifra6.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
347 res = ID0ioctl(s, SIOCAIFADDR_IN6, &ifra6);
356 ncprange_family(&addr->ifa) == AF_INET6 ? "_IN6" :
360 if (ncpaddr_family(&addr->peer) == AF_UNSPEC)
361 log_Printf(LogWARN, "iface add: ioctl(SIOCAIFADDR%s, %s): %s\n",
362 end, ncprange_ntoa(&addr->ifa), strerror(errno));
364 snprintf(dst, sizeof dst, "%s", ncpaddr_ntoa(&addr->peer));
365 log_Printf(LogWARN, "iface add: ioctl(SIOCAIFADDR%s, %s -> %s): %s\n",
366 end, ncprange_ntoa(&addr->ifa), dst, strerror(errno));
375 iface_Clear(struct iface *iface, struct ncp *ncp, int family, int how)
377 int addrs, af, inskip, in6skip, s4 = -1, s6 = -1, *s;
381 inskip = in6skip = how == IFACE_CLEAR_ALL ? 0 : 1;
384 for (n = 0; n < iface->addrs; n++) {
385 af = ncprange_family(&iface->addr[n].ifa);
386 if (family == 0 || family == af) {
387 if (!iface->addr[n].system && (how & IFACE_SYSTEM))
411 if (*s == -1 && (*s = ID0socket(af, SOCK_DGRAM, 0)) == -1)
412 log_Printf(LogERROR, "iface_Clear: socket(): %s\n", strerror(errno));
413 else if (iface_addr_Zap(iface->name, iface->addr + n, *s)) {
414 ncp_IfaceAddrDeleted(ncp, iface->addr + n);
415 bcopy(iface->addr + n + 1, iface->addr + n,
416 (iface->addrs - n - 1) * sizeof *iface->addr);
423 /* Don't bother realloc()ing - we have little to gain */
433 iface_Add(struct iface *iface, struct ncp *ncp, const struct ncprange *ifa,
434 const struct ncpaddr *peer, int how)
438 struct ncpaddr ncplocal;
439 struct iface_addr *addr, newaddr;
441 af = ncprange_family(ifa);
442 if ((s = ID0socket(af, SOCK_DGRAM, 0)) == -1) {
443 log_Printf(LogERROR, "iface_Add: socket(): %s\n", strerror(errno));
446 ncprange_getaddr(ifa, &ncplocal);
448 for (n = 0; n < iface->addrs; n++) {
449 if (ncprange_contains(&iface->addr[n].ifa, &ncplocal) ||
450 ncpaddr_equal(&iface->addr[n].peer, peer)) {
451 /* Replace this sockaddr */
452 if (!(how & IFACE_FORCE_ADD)) {
454 return 0; /* errno = EEXIST; */
457 if (ncprange_equal(&iface->addr[n].ifa, ifa) &&
458 ncpaddr_equal(&iface->addr[n].peer, peer)) {
460 return 1; /* Already there */
463 removed = iface_addr_Zap(iface->name, iface->addr + n, s);
465 ncp_IfaceAddrDeleted(ncp, iface->addr + n);
466 ncprange_copy(&iface->addr[n].ifa, ifa);
467 ncpaddr_copy(&iface->addr[n].peer, peer);
468 if (!iface_addr_Add(iface->name, iface->addr + n, s)) {
470 bcopy(iface->addr + n + 1, iface->addr + n,
471 (iface->addrs - n - 1) * sizeof *iface->addr);
479 ncp_IfaceAddrAdded(ncp, iface->addr + n);
484 addr = (struct iface_addr *)realloc
485 (iface->addr, (iface->addrs + 1) * sizeof iface->addr[0]);
487 log_Printf(LogERROR, "iface_inAdd: realloc: %s\n", strerror(errno));
493 ncprange_copy(&newaddr.ifa, ifa);
494 ncpaddr_copy(&newaddr.peer, peer);
495 newaddr.system = !!(how & IFACE_SYSTEM);
496 if (!iface_addr_Add(iface->name, &newaddr, s)) {
501 if (how & IFACE_ADD_FIRST) {
502 /* Stuff it at the start of our list */
504 bcopy(iface->addr, iface->addr + 1, iface->addrs * sizeof *iface->addr);
509 memcpy(iface->addr + n, &newaddr, sizeof(*iface->addr));
512 ncp_IfaceAddrAdded(ncp, iface->addr + n);
518 iface_Delete(struct iface *iface, struct ncp *ncp, const struct ncpaddr *del)
520 struct ncpaddr found;
524 if ((s = ID0socket(ncpaddr_family(del), SOCK_DGRAM, 0)) == -1) {
525 log_Printf(LogERROR, "iface_Delete: socket(): %s\n", strerror(errno));
529 for (n = res = 0; n < iface->addrs; n++) {
530 ncprange_getaddr(&iface->addr[n].ifa, &found);
531 if (ncpaddr_equal(&found, del)) {
532 if (iface_addr_Zap(iface->name, iface->addr + n, s)) {
533 ncp_IfaceAddrDeleted(ncp, iface->addr + n);
534 bcopy(iface->addr + n + 1, iface->addr + n,
535 (iface->addrs - n - 1) * sizeof *iface->addr);
548 #define IFACE_ADDFLAGS 1
549 #define IFACE_DELFLAGS 2
552 iface_ChangeFlags(const char *ifname, int flags, int how)
557 s = ID0socket(PF_INET, SOCK_DGRAM, 0);
559 log_Printf(LogERROR, "iface_ChangeFlags: socket: %s\n", strerror(errno));
563 memset(&ifrq, '\0', sizeof ifrq);
564 strncpy(ifrq.ifr_name, ifname, sizeof ifrq.ifr_name - 1);
565 ifrq.ifr_name[sizeof ifrq.ifr_name - 1] = '\0';
566 if (ID0ioctl(s, SIOCGIFFLAGS, &ifrq) < 0) {
567 log_Printf(LogERROR, "iface_ChangeFlags: ioctl(SIOCGIFFLAGS): %s\n",
573 if (how == IFACE_ADDFLAGS)
574 ifrq.ifr_flags |= flags;
576 ifrq.ifr_flags &= ~flags;
578 if (ID0ioctl(s, SIOCSIFFLAGS, &ifrq) < 0) {
579 log_Printf(LogERROR, "iface_ChangeFlags: ioctl(SIOCSIFFLAGS): %s\n",
586 return 1; /* Success */
590 iface_SetFlags(const char *ifname, int flags)
592 return iface_ChangeFlags(ifname, flags, IFACE_ADDFLAGS);
596 iface_ClearFlags(const char *ifname, int flags)
598 return iface_ChangeFlags(ifname, flags, IFACE_DELFLAGS);
602 iface_Destroy(struct iface *iface)
605 * iface_Clear(iface, IFACE_CLEAR_ALL) must be called manually
606 * if that's what the user wants. It's better to leave the interface
607 * allocated so that existing connections can continue to work.
617 #define if_entry(x) { IFF_##x, #x }
627 if_entry(POINTOPOINT),
642 iface_Show(struct cmdargs const *arg)
644 struct ncpaddr ncpaddr;
645 struct iface *iface = arg->bundle->iface, *current;
653 current = iface_Create(iface->name);
654 flags = iface->flags = current->flags;
655 iface_Destroy(current);
657 prompt_Printf(arg->prompt, "%s (idx %d) <", iface->name, iface->index);
658 for (f = 0; f < sizeof if_flags / sizeof if_flags[0]; f++)
659 if ((if_flags[f].flag & flags)) {
660 prompt_Printf(arg->prompt, "%s%s", flags == iface->flags ? "" : ",",
662 flags &= ~if_flags[f].flag;
667 prompt_Printf(arg->prompt, "%s0x%x", flags == iface->flags ? "" : ",",
671 prompt_Printf(arg->prompt, "> mtu %lu has %d address%s:\n", iface->mtu,
672 iface->addrs, iface->addrs == 1 ? "" : "es");
674 for (f = 0; f < iface->addrs; f++) {
675 ncprange_getaddr(&iface->addr[f].ifa, &ncpaddr);
676 switch (ncprange_family(&iface->addr[f].ifa)) {
678 prompt_Printf(arg->prompt, " inet %s --> ", ncpaddr_ntoa(&ncpaddr));
679 if (ncpaddr_family(&iface->addr[f].peer) == AF_UNSPEC)
680 prompt_Printf(arg->prompt, "255.255.255.255");
682 prompt_Printf(arg->prompt, "%s", ncpaddr_ntoa(&iface->addr[f].peer));
683 ncprange_getip4mask(&iface->addr[f].ifa, &mask);
684 prompt_Printf(arg->prompt, " netmask 0x%08lx", (long)ntohl(mask.s_addr));
689 prompt_Printf(arg->prompt, " inet6 %s", ncpaddr_ntoa(&ncpaddr));
690 if (ncpaddr_family(&iface->addr[f].peer) != AF_UNSPEC)
691 prompt_Printf(arg->prompt, " --> %s",
692 ncpaddr_ntoa(&iface->addr[f].peer));
693 ncprange_getwidth(&iface->addr[f].ifa, &width);
694 if (ncpaddr_family(&iface->addr[f].peer) == AF_UNSPEC)
695 prompt_Printf(arg->prompt, " prefixlen %d", width);
696 if ((scopeid = ncprange_scopeid(&iface->addr[f].ifa)) != -1)
697 prompt_Printf(arg->prompt, " scopeid 0x%x", (unsigned)scopeid);
701 prompt_Printf(arg->prompt, "\n");
708 iface_ParseHdr(struct ifa_msghdr *ifam, struct sockaddr *sa[RTAX_MAX])
713 wp = (char *)(ifam + 1);
715 for (rtax = 0; rtax < RTAX_MAX; rtax++)
716 if (ifam->ifam_addrs & (1 << rtax)) {
717 sa[rtax] = (struct sockaddr *)wp;
718 wp += ROUNDUP(sa[rtax]->sa_len);