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>
34 #include <net/route.h>
35 #include <netinet/in_systm.h>
36 #include <netinet/in_var.h>
37 #include <netinet/ip.h>
39 #include <netinet6/nd6.h>
48 #include <sys/ioctl.h>
49 #include <sys/sysctl.h>
64 #include "throughput.h"
65 #include "slcompress.h"
66 #include "descriptor.h"
83 #define IN6MASK128 {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
84 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }}}
85 static const struct in6_addr in6mask128 = IN6MASK128;
89 iface_Create(const char *name)
91 int mib[6], maxtries, err;
92 size_t needed, namelen;
93 char *buf, *ptr, *end;
94 struct if_msghdr *ifm;
95 struct ifa_msghdr *ifam;
96 struct sockaddr_dl *dl;
97 struct sockaddr *sa[RTAX_MAX];
99 struct iface_addr *addr;
105 mib[4] = NET_RT_IFLIST;
111 if (maxtries-- == 0 || (err && err != ENOMEM)) {
112 fprintf(stderr, "iface_Create: sysctl: %s\n", strerror(err));
116 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) {
117 fprintf(stderr, "iface_Create: sysctl: estimate: %s\n",
122 if ((buf = (char *)malloc(needed)) == NULL) {
123 fprintf(stderr, "iface_Create: malloc failed: %s\n", strerror(errno));
127 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) {
132 } while (buf == NULL);
137 namelen = strlen(name);
139 while (ptr < end && iface == NULL) {
140 ifm = (struct if_msghdr *)ptr; /* On if_msghdr */
141 if (ifm->ifm_type != RTM_IFINFO)
143 dl = (struct sockaddr_dl *)(ifm + 1); /* Single _dl at end */
144 if (dl->sdl_nlen == namelen && !strncmp(name, dl->sdl_data, namelen)) {
145 iface = (struct iface *)malloc(sizeof *iface);
147 fprintf(stderr, "iface_Create: malloc: %s\n", strerror(errno));
151 iface->name = strdup(name);
153 iface->index = ifm->ifm_index;
154 iface->flags = ifm->ifm_flags;
159 ptr += ifm->ifm_msglen; /* First ifa_msghdr */
160 for (; ptr < end; ptr += ifam->ifam_msglen) {
161 ifam = (struct ifa_msghdr *)ptr; /* Next if address */
163 if (ifam->ifam_type != RTM_NEWADDR) /* finished this if */
166 if (iface != NULL && ifam->ifam_addrs & RTA_IFA) {
167 /* Found a configured interface ! */
168 iface_ParseHdr(ifam, sa);
170 if (sa[RTAX_IFA] && (sa[RTAX_IFA]->sa_family == AF_INET
172 || sa[RTAX_IFA]->sa_family == AF_INET6
175 /* Record the address */
177 addr = (struct iface_addr *)
178 realloc(iface->addr, (iface->addrs + 1) * sizeof iface->addr[0]);
183 addr += iface->addrs;
186 ncprange_setsa(&addr->ifa, sa[RTAX_IFA], sa[RTAX_NETMASK]);
188 ncpaddr_setsa(&addr->peer, sa[RTAX_BRD]);
190 ncpaddr_init(&addr->peer);
202 iface_addr_Zap(const char *name, struct iface_addr *addr, int s)
204 struct ifaliasreq ifra;
206 struct in6_aliasreq ifra6;
208 struct sockaddr_in *me4, *msk4, *peer4;
209 struct sockaddr_storage ssme, sspeer, ssmsk;
212 ncprange_getsa(&addr->ifa, &ssme, &ssmsk);
213 ncpaddr_getsa(&addr->peer, &sspeer);
216 switch (ncprange_family(&addr->ifa)) {
218 memset(&ifra, '\0', sizeof ifra);
219 strncpy(ifra.ifra_name, name, sizeof ifra.ifra_name - 1);
221 me4 = (struct sockaddr_in *)&ifra.ifra_addr;
222 memcpy(me4, &ssme, sizeof *me4);
224 msk4 = (struct sockaddr_in *)&ifra.ifra_mask;
225 memcpy(msk4, &ssmsk, sizeof *msk4);
227 peer4 = (struct sockaddr_in *)&ifra.ifra_broadaddr;
228 if (ncpaddr_family(&addr->peer) == AF_UNSPEC) {
229 peer4->sin_family = AF_INET;
230 peer4->sin_len = sizeof(*peer4);
231 peer4->sin_addr.s_addr = INADDR_NONE;
233 memcpy(peer4, &sspeer, sizeof *peer4);
235 res = ID0ioctl(s, SIOCDIFADDR, &ifra);
236 if (log_IsKept(LogDEBUG)) {
239 snprintf(buf, sizeof buf, "%s", ncprange_ntoa(&addr->ifa));
240 log_Printf(LogWARN, "%s: DIFADDR %s -> %s returns %d\n",
241 ifra.ifra_name, buf, ncpaddr_ntoa(&addr->peer), res);
247 memset(&ifra6, '\0', sizeof ifra6);
248 strncpy(ifra6.ifra_name, name, sizeof ifra6.ifra_name - 1);
250 memcpy(&ifra6.ifra_addr, &ssme, sizeof ifra6.ifra_addr);
251 memcpy(&ifra6.ifra_prefixmask, &ssmsk, sizeof ifra6.ifra_prefixmask);
252 ifra6.ifra_prefixmask.sin6_family = AF_UNSPEC;
253 if (ncpaddr_family(&addr->peer) == AF_UNSPEC)
254 ifra6.ifra_dstaddr.sin6_family = AF_UNSPEC;
256 memcpy(&ifra6.ifra_dstaddr, &sspeer, sizeof ifra6.ifra_dstaddr);
257 ifra6.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
258 ifra6.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
260 res = ID0ioctl(s, SIOCDIFADDR_IN6, &ifra6);
269 ncprange_family(&addr->ifa) == AF_INET6 ? "_IN6" :
273 if (ncpaddr_family(&addr->peer) == AF_UNSPEC)
274 log_Printf(LogWARN, "iface rm: ioctl(SIOCDIFADDR%s, %s): %s\n",
275 end, ncprange_ntoa(&addr->ifa), strerror(errno));
277 snprintf(dst, sizeof dst, "%s", ncpaddr_ntoa(&addr->peer));
278 log_Printf(LogWARN, "iface rm: ioctl(SIOCDIFADDR%s, %s -> %s): %s\n",
279 end, ncprange_ntoa(&addr->ifa), dst, strerror(errno));
287 iface_addr_Add(const char *name, struct iface_addr *addr, int s)
289 struct ifaliasreq ifra;
291 struct in6_aliasreq ifra6;
293 struct sockaddr_in *me4, *msk4, *peer4;
294 struct sockaddr_storage ssme, sspeer, ssmsk;
297 ncprange_getsa(&addr->ifa, &ssme, &ssmsk);
298 ncpaddr_getsa(&addr->peer, &sspeer);
301 switch (ncprange_family(&addr->ifa)) {
303 memset(&ifra, '\0', sizeof ifra);
304 strncpy(ifra.ifra_name, name, sizeof ifra.ifra_name - 1);
306 me4 = (struct sockaddr_in *)&ifra.ifra_addr;
307 memcpy(me4, &ssme, sizeof *me4);
309 msk4 = (struct sockaddr_in *)&ifra.ifra_mask;
310 memcpy(msk4, &ssmsk, sizeof *msk4);
312 peer4 = (struct sockaddr_in *)&ifra.ifra_broadaddr;
313 if (ncpaddr_family(&addr->peer) == AF_UNSPEC) {
314 peer4->sin_family = AF_INET;
315 peer4->sin_len = sizeof(*peer4);
316 peer4->sin_addr.s_addr = INADDR_NONE;
318 memcpy(peer4, &sspeer, sizeof *peer4);
320 res = ID0ioctl(s, SIOCAIFADDR, &ifra);
321 if (log_IsKept(LogDEBUG)) {
324 snprintf(buf, sizeof buf, "%s", ncprange_ntoa(&addr->ifa));
325 log_Printf(LogWARN, "%s: AIFADDR %s -> %s returns %d\n",
326 ifra.ifra_name, buf, ncpaddr_ntoa(&addr->peer), res);
332 memset(&ifra6, '\0', sizeof ifra6);
333 strncpy(ifra6.ifra_name, name, sizeof ifra6.ifra_name - 1);
335 memcpy(&ifra6.ifra_addr, &ssme, sizeof ifra6.ifra_addr);
336 memcpy(&ifra6.ifra_prefixmask, &ssmsk, sizeof ifra6.ifra_prefixmask);
337 if (ncpaddr_family(&addr->peer) == AF_UNSPEC)
338 ifra6.ifra_dstaddr.sin6_family = AF_UNSPEC;
339 else if (memcmp(&((struct sockaddr_in6 *)&ssmsk)->sin6_addr, &in6mask128,
340 sizeof in6mask128) == 0)
341 memcpy(&ifra6.ifra_dstaddr, &sspeer, sizeof ifra6.ifra_dstaddr);
342 ifra6.ifra_lifetime.ia6t_vltime = ND6_INFINITE_LIFETIME;
343 ifra6.ifra_lifetime.ia6t_pltime = ND6_INFINITE_LIFETIME;
345 res = ID0ioctl(s, SIOCAIFADDR_IN6, &ifra6);
354 ncprange_family(&addr->ifa) == AF_INET6 ? "_IN6" :
358 if (ncpaddr_family(&addr->peer) == AF_UNSPEC)
359 log_Printf(LogWARN, "iface add: ioctl(SIOCAIFADDR%s, %s): %s\n",
360 end, ncprange_ntoa(&addr->ifa), strerror(errno));
362 snprintf(dst, sizeof dst, "%s", ncpaddr_ntoa(&addr->peer));
363 log_Printf(LogWARN, "iface add: ioctl(SIOCAIFADDR%s, %s -> %s): %s\n",
364 end, ncprange_ntoa(&addr->ifa), dst, strerror(errno));
372 iface_Name(struct iface *iface, const char *name)
378 if ((newname = strdup(name)) == NULL) {
379 log_Printf(LogWARN, "iface name: strdup failed: %s\n", strerror(errno));
383 if ((s = ID0socket(PF_INET, SOCK_DGRAM, 0)) == -1) {
384 log_Printf(LogERROR, "iface name: socket(): %s\n", strerror(errno));
389 strlcpy(ifr.ifr_name, iface->name, sizeof(ifr.ifr_name));
390 ifr.ifr_data = newname;
391 if (ID0ioctl(s, SIOCSIFNAME, (caddr_t)&ifr) < 0) {
392 log_Printf(LogWARN, "iface name: ioctl(SIOCSIFNAME, %s -> %s): %s\n",
393 name, newname, strerror(errno));
399 iface->name = newname;
405 iface_Descr(struct cmdargs const *arg)
410 int s, n, ifdescr_maxlen;
414 if (sysctlbyname("net.ifdescr_maxlen", &ifdescr_maxlen, &sz, NULL, 0) < 0) {
415 log_Printf(LogERROR, "iface descr: sysctl failed: %s\n", strerror(errno));
419 if (ifdescr_maxlen < 1) {
420 log_Printf(LogERROR, "iface descr: sysctl net.ifdescr_maxlen < 1\n");
424 sz = sizeof(char) * ifdescr_maxlen;
425 if ((descr = malloc(sz)) == NULL) {
426 log_Printf(LogERROR, "iface descr: malloc failed: %s\n", strerror(errno));
432 while (n < arg->argc) {
433 if (n > arg->argn && (len = strlcat(descr, " ", sz)) >= sz)
435 if ((len = strlcat(descr, arg->argv[n], sz)) >= sz)
440 log_Printf(LogERROR, "iface descr: description exceeds maximum (%d)\n",
446 if ((s = ID0socket(PF_INET, SOCK_DGRAM, 0)) == -1) {
447 log_Printf(LogERROR, "iface descr: socket(): %s\n", strerror(errno));
452 iface = arg->bundle->iface;
453 strlcpy(ifr.ifr_name, iface->name, sizeof(ifr.ifr_name));
454 ifr.ifr_buffer.length = strlen(descr) + 1;
455 ifr.ifr_buffer.buffer = descr;
456 if (ID0ioctl(s, SIOCSIFDESCR, (caddr_t)&ifr) < 0) {
457 log_Printf(LogWARN, "iface descr: ioctl(SIOCSIFDESCR, %s): %s\n",
458 descr, strerror(errno));
464 iface->descr = descr;
470 iface_Clear(struct iface *iface, struct ncp *ncp, int family, int how)
472 int af, inskip, in6skip, s4 = -1, s6 = -1, *s;
476 inskip = in6skip = how == IFACE_CLEAR_ALL ? 0 : 1;
478 for (n = 0; n < iface->addrs; n++) {
479 af = ncprange_family(&iface->addr[n].ifa);
480 if (family == 0 || family == af) {
481 if (!iface->addr[n].system && (how & IFACE_SYSTEM))
505 if (*s == -1 && (*s = ID0socket(af, SOCK_DGRAM, 0)) == -1)
506 log_Printf(LogERROR, "iface_Clear: socket(): %s\n", strerror(errno));
507 else if (iface_addr_Zap(iface->name, iface->addr + n, *s)) {
508 ncp_IfaceAddrDeleted(ncp, iface->addr + n);
509 bcopy(iface->addr + n + 1, iface->addr + n,
510 (iface->addrs - n - 1) * sizeof *iface->addr);
517 /* Don't bother realloc()ing - we have little to gain */
527 iface_Add(struct iface *iface, struct ncp *ncp, const struct ncprange *ifa,
528 const struct ncpaddr *peer, int how)
532 struct ncpaddr ncplocal;
533 struct iface_addr *addr, newaddr;
535 af = ncprange_family(ifa);
536 if ((s = ID0socket(af, SOCK_DGRAM, 0)) == -1) {
537 log_Printf(LogERROR, "iface_Add: socket(): %s\n", strerror(errno));
540 ncprange_getaddr(ifa, &ncplocal);
542 for (n = 0; n < iface->addrs; n++) {
543 if (ncprange_contains(&iface->addr[n].ifa, &ncplocal) ||
544 ncpaddr_equal(&iface->addr[n].peer, peer)) {
545 /* Replace this sockaddr */
546 if (!(how & IFACE_FORCE_ADD)) {
548 return 0; /* errno = EEXIST; */
551 if (ncprange_equal(&iface->addr[n].ifa, ifa) &&
552 ncpaddr_equal(&iface->addr[n].peer, peer)) {
554 ncp_IfaceAddrAdded(ncp, iface->addr + n);
555 return 1; /* Already there */
558 removed = iface_addr_Zap(iface->name, iface->addr + n, s);
560 ncp_IfaceAddrDeleted(ncp, iface->addr + n);
561 ncprange_copy(&iface->addr[n].ifa, ifa);
562 ncpaddr_copy(&iface->addr[n].peer, peer);
563 if (!iface_addr_Add(iface->name, iface->addr + n, s)) {
565 bcopy(iface->addr + n + 1, iface->addr + n,
566 (iface->addrs - n - 1) * sizeof *iface->addr);
574 ncp_IfaceAddrAdded(ncp, iface->addr + n);
579 addr = (struct iface_addr *)realloc
580 (iface->addr, (iface->addrs + 1) * sizeof iface->addr[0]);
582 log_Printf(LogERROR, "iface_inAdd: realloc: %s\n", strerror(errno));
588 ncprange_copy(&newaddr.ifa, ifa);
589 ncpaddr_copy(&newaddr.peer, peer);
590 newaddr.system = !!(how & IFACE_SYSTEM);
591 if (!iface_addr_Add(iface->name, &newaddr, s)) {
596 if (how & IFACE_ADD_FIRST) {
597 /* Stuff it at the start of our list */
599 bcopy(iface->addr, iface->addr + 1, iface->addrs * sizeof *iface->addr);
604 memcpy(iface->addr + n, &newaddr, sizeof(*iface->addr));
607 ncp_IfaceAddrAdded(ncp, iface->addr + n);
613 iface_Delete(struct iface *iface, struct ncp *ncp, const struct ncpaddr *del)
615 struct ncpaddr found;
619 if ((s = ID0socket(ncpaddr_family(del), SOCK_DGRAM, 0)) == -1) {
620 log_Printf(LogERROR, "iface_Delete: socket(): %s\n", strerror(errno));
624 for (n = res = 0; n < iface->addrs; n++) {
625 ncprange_getaddr(&iface->addr[n].ifa, &found);
626 if (ncpaddr_equal(&found, del)) {
627 if (iface_addr_Zap(iface->name, iface->addr + n, s)) {
628 ncp_IfaceAddrDeleted(ncp, iface->addr + n);
629 bcopy(iface->addr + n + 1, iface->addr + n,
630 (iface->addrs - n - 1) * sizeof *iface->addr);
643 #define IFACE_ADDFLAGS 1
644 #define IFACE_DELFLAGS 2
647 iface_ChangeFlags(const char *ifname, int flags, int how)
652 s = ID0socket(PF_INET, SOCK_DGRAM, 0);
654 log_Printf(LogERROR, "iface_ChangeFlags: socket: %s\n", strerror(errno));
658 memset(&ifrq, '\0', sizeof ifrq);
659 strncpy(ifrq.ifr_name, ifname, sizeof ifrq.ifr_name - 1);
660 ifrq.ifr_name[sizeof ifrq.ifr_name - 1] = '\0';
661 if (ID0ioctl(s, SIOCGIFFLAGS, &ifrq) < 0) {
662 log_Printf(LogERROR, "iface_ChangeFlags: ioctl(SIOCGIFFLAGS): %s\n",
668 new_flags = (ifrq.ifr_flags & 0xffff) | (ifrq.ifr_flagshigh << 16);
670 new_flags = ifrq.ifr_flags & 0xffff;
673 if (how == IFACE_ADDFLAGS)
677 ifrq.ifr_flags = new_flags & 0xffff;
679 ifrq.ifr_flagshigh = new_flags >> 16;
682 if (ID0ioctl(s, SIOCSIFFLAGS, &ifrq) < 0) {
683 log_Printf(LogERROR, "iface_ChangeFlags: ioctl(SIOCSIFFLAGS): %s\n",
690 return 1; /* Success */
694 iface_SetFlags(const char *ifname, int flags)
696 return iface_ChangeFlags(ifname, flags, IFACE_ADDFLAGS);
700 iface_ClearFlags(const char *ifname, int flags)
702 return iface_ChangeFlags(ifname, flags, IFACE_DELFLAGS);
706 iface_Free(struct iface *iface)
715 iface_Destroy(struct iface *iface)
721 if ((s = ID0socket(PF_INET, SOCK_DGRAM, 0)) == -1) {
722 log_Printf(LogERROR, "iface_Destroy: socket(): %s\n", strerror(errno));
724 strlcpy(ifr.ifr_name, iface->name, sizeof(ifr.ifr_name));
725 if (ID0ioctl(s, SIOCIFDESTROY, (caddr_t)&ifr) < 0)
726 log_Printf(LogWARN, "iface_Destroy: ioctl(SIOCIFDESTROY, %s): %s\n",
727 iface->name, strerror(errno));
733 #define if_entry(x) { IFF_##x, #x }
743 if_entry(POINTOPOINT),
758 iface_Show(struct cmdargs const *arg)
760 struct ncpaddr ncpaddr;
761 struct iface *iface = arg->bundle->iface, *current;
769 current = iface_Create(iface->name);
770 flags = iface->flags = current->flags;
773 prompt_Printf(arg->prompt, "%s (idx %d) <", iface->name, iface->index);
774 for (f = 0; f < sizeof if_flags / sizeof if_flags[0]; f++)
775 if ((if_flags[f].flag & flags)) {
776 prompt_Printf(arg->prompt, "%s%s", flags == iface->flags ? "" : ",",
778 flags &= ~if_flags[f].flag;
783 prompt_Printf(arg->prompt, "%s0x%x", flags == iface->flags ? "" : ",",
787 prompt_Printf(arg->prompt, "> mtu %lu has %d address%s:\n", iface->mtu,
788 iface->addrs, iface->addrs == 1 ? "" : "es");
790 for (f = 0; f < iface->addrs; f++) {
791 ncprange_getaddr(&iface->addr[f].ifa, &ncpaddr);
792 switch (ncprange_family(&iface->addr[f].ifa)) {
794 prompt_Printf(arg->prompt, " inet %s --> ", ncpaddr_ntoa(&ncpaddr));
795 if (ncpaddr_family(&iface->addr[f].peer) == AF_UNSPEC)
796 prompt_Printf(arg->prompt, "255.255.255.255");
798 prompt_Printf(arg->prompt, "%s", ncpaddr_ntoa(&iface->addr[f].peer));
799 ncprange_getip4mask(&iface->addr[f].ifa, &mask);
800 prompt_Printf(arg->prompt, " netmask 0x%08lx", (long)ntohl(mask.s_addr));
805 prompt_Printf(arg->prompt, " inet6 %s", ncpaddr_ntoa(&ncpaddr));
806 if (ncpaddr_family(&iface->addr[f].peer) != AF_UNSPEC)
807 prompt_Printf(arg->prompt, " --> %s",
808 ncpaddr_ntoa(&iface->addr[f].peer));
809 ncprange_getwidth(&iface->addr[f].ifa, &width);
810 if (ncpaddr_family(&iface->addr[f].peer) == AF_UNSPEC)
811 prompt_Printf(arg->prompt, " prefixlen %d", width);
812 if ((scopeid = ncprange_scopeid(&iface->addr[f].ifa)) != -1)
813 prompt_Printf(arg->prompt, " scopeid 0x%x", (unsigned)scopeid);
817 prompt_Printf(arg->prompt, "\n");
824 iface_ParseHdr(struct ifa_msghdr *ifam, struct sockaddr *sa[RTAX_MAX])
829 wp = (char *)(ifam + 1);
831 for (rtax = 0; rtax < RTAX_MAX; rtax++)
832 if (ifam->ifam_addrs & (1 << rtax)) {
833 sa[rtax] = (struct sockaddr *)wp;
834 wp += ROUNDUP(sa[rtax]->sa_len);