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
29 #include <sys/param.h>
30 #include <sys/socket.h>
31 #include <netinet/in.h>
33 #include <net/if_dl.h>
35 #include <net/if_var.h>
37 #include <net/route.h>
38 #include <netinet/in_systm.h>
39 #include <netinet/in_var.h>
40 #include <netinet/ip.h>
42 #include <netinet6/nd6.h>
50 #include <sys/ioctl.h>
51 #include <sys/sysctl.h>
66 #include "throughput.h"
67 #include "slcompress.h"
68 #include "descriptor.h"
87 iface_Create(const char *name)
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];
97 struct iface_addr *addr;
103 mib[4] = NET_RT_IFLIST;
109 if (maxtries-- == 0 || (err && err != ENOMEM)) {
110 fprintf(stderr, "iface_Create: sysctl: %s\n", strerror(err));
114 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) {
115 fprintf(stderr, "iface_Create: sysctl: estimate: %s\n",
120 if ((buf = (char *)malloc(needed)) == NULL) {
121 fprintf(stderr, "iface_Create: malloc failed: %s\n", strerror(errno));
125 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) {
130 } while (buf == NULL);
135 namelen = strlen(name);
137 while (ptr < end && iface == NULL) {
138 ifm = (struct if_msghdr *)ptr; /* On if_msghdr */
139 if (ifm->ifm_type != RTM_IFINFO)
141 dl = (struct sockaddr_dl *)(ifm + 1); /* Single _dl at end */
142 if (dl->sdl_nlen == namelen && !strncmp(name, dl->sdl_data, namelen)) {
143 iface = (struct iface *)malloc(sizeof *iface);
145 fprintf(stderr, "iface_Create: malloc: %s\n", strerror(errno));
148 iface->name = strdup(name);
149 iface->index = ifm->ifm_index;
150 iface->flags = ifm->ifm_flags;
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 */
159 if (ifam->ifam_type != RTM_NEWADDR) /* finished this if */
162 if (iface != NULL && ifam->ifam_addrs & RTA_IFA) {
163 /* Found a configured interface ! */
164 iface_ParseHdr(ifam, sa);
166 if (sa[RTAX_IFA] && (sa[RTAX_IFA]->sa_family == AF_INET
168 || sa[RTAX_IFA]->sa_family == AF_INET6
171 /* Record the address */
173 addr = (struct iface_addr *)
174 realloc(iface->addr, (iface->addrs + 1) * sizeof iface->addr[0]);
179 addr += iface->addrs;
182 ncprange_setsa(&addr->ifa, sa[RTAX_IFA], sa[RTAX_NETMASK]);
184 ncpaddr_setsa(&addr->peer, sa[RTAX_BRD]);
186 ncpaddr_init(&addr->peer);
198 iface_addr_Zap(const char *name, struct iface_addr *addr, int s)
200 struct ifaliasreq ifra;
202 struct in6_aliasreq ifra6;
204 struct sockaddr_in *me4, *msk4, *peer4;
205 struct sockaddr_storage ssme, sspeer, ssmsk;
208 ncprange_getsa(&addr->ifa, &ssme, &ssmsk);
209 ncpaddr_getsa(&addr->peer, &sspeer);
212 switch (ncprange_family(&addr->ifa)) {
214 memset(&ifra, '\0', sizeof ifra);
215 strncpy(ifra.ifra_name, name, sizeof ifra.ifra_name - 1);
217 me4 = (struct sockaddr_in *)&ifra.ifra_addr;
218 memcpy(me4, &ssme, sizeof *me4);
220 msk4 = (struct sockaddr_in *)&ifra.ifra_mask;
221 memcpy(msk4, &ssmsk, sizeof *msk4);
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;
229 memcpy(peer4, &sspeer, sizeof *peer4);
231 res = ID0ioctl(s, SIOCDIFADDR, &ifra);
232 if (log_IsKept(LogDEBUG)) {
235 snprintf(buf, sizeof buf, "%s", ncprange_ntoa(&addr->ifa));
236 log_Printf(LogWARN, "%s: DIFADDR %s -> %s returns %d\n",
237 ifra.ifra_name, buf, ncpaddr_ntoa(&addr->peer), res);
243 memset(&ifra6, '\0', sizeof ifra6);
244 strncpy(ifra6.ifra_name, name, sizeof ifra6.ifra_name - 1);
246 memcpy(&ifra6.ifra_addr, &ssme, sizeof ifra6.ifra_addr);
247 memcpy(&ifra6.ifra_prefixmask, &ssmsk, sizeof ifra6.ifra_prefixmask);
248 ifra6.ifra_prefixmask.sin6_family = AF_UNSPEC;
249 if (ncpaddr_family(&addr->peer) == AF_UNSPEC)
250 ifra6.ifra_dstaddr.sin6_family = AF_UNSPEC;
252 memcpy(&ifra6.ifra_dstaddr, &sspeer, sizeof ifra6.ifra_dstaddr);
253 ifra6.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
254 ifra6.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
256 res = ID0ioctl(s, SIOCDIFADDR_IN6, &ifra6);
265 ncprange_family(&addr->ifa) == AF_INET6 ? "_IN6" :
269 if (ncpaddr_family(&addr->peer) == AF_UNSPEC)
270 log_Printf(LogWARN, "iface rm: ioctl(SIOCDIFADDR%s, %s): %s\n",
271 end, ncprange_ntoa(&addr->ifa), strerror(errno));
273 snprintf(dst, sizeof dst, "%s", ncpaddr_ntoa(&addr->peer));
274 log_Printf(LogWARN, "iface rm: ioctl(SIOCDIFADDR%s, %s -> %s): %s\n",
275 end, ncprange_ntoa(&addr->ifa), dst, strerror(errno));
283 iface_addr_Add(const char *name, struct iface_addr *addr, int s)
285 struct ifaliasreq ifra;
287 struct in6_aliasreq ifra6;
289 struct sockaddr_in *me4, *msk4, *peer4;
290 struct sockaddr_storage ssme, sspeer, ssmsk;
293 ncprange_getsa(&addr->ifa, &ssme, &ssmsk);
294 ncpaddr_getsa(&addr->peer, &sspeer);
297 switch (ncprange_family(&addr->ifa)) {
299 memset(&ifra, '\0', sizeof ifra);
300 strncpy(ifra.ifra_name, name, sizeof ifra.ifra_name - 1);
302 me4 = (struct sockaddr_in *)&ifra.ifra_addr;
303 memcpy(me4, &ssme, sizeof *me4);
305 msk4 = (struct sockaddr_in *)&ifra.ifra_mask;
306 memcpy(msk4, &ssmsk, sizeof *msk4);
308 peer4 = (struct sockaddr_in *)&ifra.ifra_broadaddr;
309 if (ncpaddr_family(&addr->peer) == AF_UNSPEC) {
310 peer4->sin_family = AF_INET;
311 peer4->sin_len = sizeof(*peer4);
312 peer4->sin_addr.s_addr = INADDR_NONE;
314 memcpy(peer4, &sspeer, sizeof *peer4);
316 res = ID0ioctl(s, SIOCAIFADDR, &ifra);
317 if (log_IsKept(LogDEBUG)) {
320 snprintf(buf, sizeof buf, "%s", ncprange_ntoa(&addr->ifa));
321 log_Printf(LogWARN, "%s: AIFADDR %s -> %s returns %d\n",
322 ifra.ifra_name, buf, ncpaddr_ntoa(&addr->peer), res);
328 memset(&ifra6, '\0', sizeof ifra6);
329 strncpy(ifra6.ifra_name, name, sizeof ifra6.ifra_name - 1);
331 memcpy(&ifra6.ifra_addr, &ssme, sizeof ifra6.ifra_addr);
332 memcpy(&ifra6.ifra_prefixmask, &ssmsk, sizeof ifra6.ifra_prefixmask);
333 if (ncpaddr_family(&addr->peer) == AF_UNSPEC)
334 ifra6.ifra_dstaddr.sin6_family = AF_UNSPEC;
336 memcpy(&ifra6.ifra_dstaddr, &sspeer, sizeof ifra6.ifra_dstaddr);
337 ifra6.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
338 ifra6.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
340 res = ID0ioctl(s, SIOCAIFADDR_IN6, &ifra6);
349 ncprange_family(&addr->ifa) == AF_INET6 ? "_IN6" :
353 if (ncpaddr_family(&addr->peer) == AF_UNSPEC)
354 log_Printf(LogWARN, "iface add: ioctl(SIOCAIFADDR%s, %s): %s\n",
355 end, ncprange_ntoa(&addr->ifa), strerror(errno));
357 snprintf(dst, sizeof dst, "%s", ncpaddr_ntoa(&addr->peer));
358 log_Printf(LogWARN, "iface add: ioctl(SIOCAIFADDR%s, %s -> %s): %s\n",
359 end, ncprange_ntoa(&addr->ifa), dst, strerror(errno));
368 iface_Clear(struct iface *iface, struct ncp *ncp, int family, int how)
370 int addrs, af, inskip, in6skip, n, s4 = -1, s6 = -1, *s;
373 inskip = in6skip = how == IFACE_CLEAR_ALL ? 0 : 1;
376 for (n = 0; n < iface->addrs; n++) {
377 af = ncprange_family(&iface->addr[n].ifa);
378 if (family == 0 || family == af) {
379 if (!iface->addr[n].system && (how & IFACE_SYSTEM))
403 if (*s == -1 && (*s = ID0socket(af, SOCK_DGRAM, 0)) == -1)
404 log_Printf(LogERROR, "iface_Clear: socket(): %s\n", strerror(errno));
405 else if (iface_addr_Zap(iface->name, iface->addr + n, *s)) {
406 ncp_IfaceAddrDeleted(ncp, iface->addr + n);
407 bcopy(iface->addr + n + 1, iface->addr + n,
408 (iface->addrs - n - 1) * sizeof *iface->addr);
415 /* Don't bother realloc()ing - we have little to gain */
425 iface_Add(struct iface *iface, struct ncp *ncp, const struct ncprange *ifa,
426 const struct ncpaddr *peer, int how)
428 int af, n, removed, s, width;
429 struct ncpaddr ncplocal;
430 struct iface_addr *addr, newaddr;
432 af = ncprange_family(ifa);
433 if ((s = ID0socket(af, SOCK_DGRAM, 0)) == -1) {
434 log_Printf(LogERROR, "iface_Add: socket(): %s\n", strerror(errno));
437 ncprange_getaddr(ifa, &ncplocal);
439 for (n = 0; n < iface->addrs; n++) {
440 if (ncprange_contains(&iface->addr[n].ifa, &ncplocal) ||
441 ncpaddr_equal(&iface->addr[n].peer, peer)) {
442 /* Replace this sockaddr */
443 if (!(how & IFACE_FORCE_ADD)) {
445 return 0; /* errno = EEXIST; */
448 if (ncprange_equal(&iface->addr[n].ifa, ifa) &&
449 ncpaddr_equal(&iface->addr[n].peer, peer)) {
451 return 1; /* Already there */
456 (af == AF_INET6) ? 128 :
459 removed = iface_addr_Zap(iface->name, iface->addr + n, s);
461 ncp_IfaceAddrDeleted(ncp, iface->addr + n);
462 ncprange_copy(&iface->addr[n].ifa, ifa);
463 ncpaddr_copy(&iface->addr[n].peer, peer);
464 if (!iface_addr_Add(iface->name, iface->addr + n, s)) {
466 bcopy(iface->addr + n + 1, iface->addr + n,
467 (iface->addrs - n - 1) * sizeof *iface->addr);
475 ncp_IfaceAddrAdded(ncp, iface->addr + n);
480 addr = (struct iface_addr *)realloc
481 (iface->addr, (iface->addrs + 1) * sizeof iface->addr[0]);
483 log_Printf(LogERROR, "iface_inAdd: realloc: %s\n", strerror(errno));
489 ncprange_copy(&newaddr.ifa, ifa);
490 ncpaddr_copy(&newaddr.peer, peer);
491 newaddr.system = !!(how & IFACE_SYSTEM);
492 if (!iface_addr_Add(iface->name, &newaddr, s)) {
497 if (how & IFACE_ADD_FIRST) {
498 /* Stuff it at the start of our list */
500 bcopy(iface->addr, iface->addr + 1, iface->addrs * sizeof *iface->addr);
505 memcpy(iface->addr + n, &newaddr, sizeof(*iface->addr));
508 ncp_IfaceAddrAdded(ncp, iface->addr + n);
514 iface_Delete(struct iface *iface, struct ncp *ncp, const struct ncpaddr *del)
516 struct ncpaddr found;
519 if ((s = ID0socket(ncpaddr_family(del), SOCK_DGRAM, 0)) == -1) {
520 log_Printf(LogERROR, "iface_Delete: socket(): %s\n", strerror(errno));
524 for (n = res = 0; n < iface->addrs; n++) {
525 ncprange_getaddr(&iface->addr[n].ifa, &found);
526 if (ncpaddr_equal(&found, del)) {
527 if (iface_addr_Zap(iface->name, iface->addr + n, s)) {
528 ncp_IfaceAddrDeleted(ncp, iface->addr + n);
529 bcopy(iface->addr + n + 1, iface->addr + n,
530 (iface->addrs - n - 1) * sizeof *iface->addr);
543 #define IFACE_ADDFLAGS 1
544 #define IFACE_DELFLAGS 2
547 iface_ChangeFlags(const char *ifname, int flags, int how)
552 s = ID0socket(PF_INET, SOCK_DGRAM, 0);
554 log_Printf(LogERROR, "iface_ChangeFlags: socket: %s\n", strerror(errno));
558 memset(&ifrq, '\0', sizeof ifrq);
559 strncpy(ifrq.ifr_name, ifname, sizeof ifrq.ifr_name - 1);
560 ifrq.ifr_name[sizeof ifrq.ifr_name - 1] = '\0';
561 if (ID0ioctl(s, SIOCGIFFLAGS, &ifrq) < 0) {
562 log_Printf(LogERROR, "iface_ChangeFlags: ioctl(SIOCGIFFLAGS): %s\n",
568 if (how == IFACE_ADDFLAGS)
569 ifrq.ifr_flags |= flags;
571 ifrq.ifr_flags &= ~flags;
573 if (ID0ioctl(s, SIOCSIFFLAGS, &ifrq) < 0) {
574 log_Printf(LogERROR, "iface_ChangeFlags: ioctl(SIOCSIFFLAGS): %s\n",
581 return 1; /* Success */
585 iface_SetFlags(const char *ifname, int flags)
587 return iface_ChangeFlags(ifname, flags, IFACE_ADDFLAGS);
591 iface_ClearFlags(const char *ifname, int flags)
593 return iface_ChangeFlags(ifname, flags, IFACE_DELFLAGS);
597 iface_Destroy(struct iface *iface)
600 * iface_Clear(iface, IFACE_CLEAR_ALL) must be called manually
601 * if that's what the user wants. It's better to leave the interface
602 * allocated so that existing connections can continue to work.
612 #define if_entry(x) { IFF_##x, #x }
622 if_entry(POINTOPOINT),
637 iface_Show(struct cmdargs const *arg)
639 struct ncpaddr ncpaddr;
640 struct iface *iface = arg->bundle->iface, *current;
647 current = iface_Create(iface->name);
648 flags = iface->flags = current->flags;
649 iface_Destroy(current);
651 prompt_Printf(arg->prompt, "%s (idx %d) <", iface->name, iface->index);
652 for (f = 0; f < sizeof if_flags / sizeof if_flags[0]; f++)
653 if ((if_flags[f].flag & flags)) {
654 prompt_Printf(arg->prompt, "%s%s", flags == iface->flags ? "" : ",",
656 flags &= ~if_flags[f].flag;
661 prompt_Printf(arg->prompt, "%s0x%x", flags == iface->flags ? "" : ",",
665 prompt_Printf(arg->prompt, "> mtu %d has %d address%s:\n", iface->mtu,
666 iface->addrs, iface->addrs == 1 ? "" : "es");
668 for (f = 0; f < iface->addrs; f++) {
669 ncprange_getaddr(&iface->addr[f].ifa, &ncpaddr);
670 switch (ncprange_family(&iface->addr[f].ifa)) {
672 prompt_Printf(arg->prompt, " inet %s --> ", ncpaddr_ntoa(&ncpaddr));
673 if (ncpaddr_family(&iface->addr[f].peer) == AF_UNSPEC)
674 prompt_Printf(arg->prompt, "255.255.255.255");
676 prompt_Printf(arg->prompt, "%s", ncpaddr_ntoa(&iface->addr[f].peer));
677 ncprange_getip4mask(&iface->addr[f].ifa, &mask);
678 prompt_Printf(arg->prompt, " netmask 0x%08lx", (long)ntohl(mask.s_addr));
683 prompt_Printf(arg->prompt, " inet6 %s", ncpaddr_ntoa(&ncpaddr));
684 if (ncpaddr_family(&iface->addr[f].peer) != AF_UNSPEC)
685 prompt_Printf(arg->prompt, " --> %s",
686 ncpaddr_ntoa(&iface->addr[f].peer));
687 ncprange_getwidth(&iface->addr[f].ifa, &width);
688 if (ncpaddr_family(&iface->addr[f].peer) == AF_UNSPEC)
689 prompt_Printf(arg->prompt, " prefixlen %d", width);
690 if ((scopeid = ncprange_scopeid(&iface->addr[f].ifa)) != -1)
691 prompt_Printf(arg->prompt, " scopeid 0x%x", (unsigned)scopeid);
695 prompt_Printf(arg->prompt, "\n");
702 iface_ParseHdr(struct ifa_msghdr *ifam, struct sockaddr *sa[RTAX_MAX])
707 wp = (char *)(ifam + 1);
709 for (rtax = 0; rtax < RTAX_MAX; rtax++)
710 if (ifam->ifam_addrs & (1 << rtax)) {
711 sa[rtax] = (struct sockaddr *)wp;
712 wp += ROUNDUP(sa[rtax]->sa_len);