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>
51 #include <sys/ioctl.h>
52 #include <sys/sysctl.h>
67 #include "throughput.h"
68 #include "slcompress.h"
69 #include "descriptor.h"
86 #define IN6MASK128 {{{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, \
87 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }}}
88 static const struct in6_addr in6mask128 = IN6MASK128;
92 iface_Create(const char *name)
94 int mib[6], maxtries, err;
95 size_t needed, namelen;
96 char *buf, *ptr, *end;
97 struct if_msghdr *ifm;
98 struct ifa_msghdr *ifam;
99 struct sockaddr_dl *dl;
100 struct sockaddr *sa[RTAX_MAX];
102 struct iface_addr *addr;
108 mib[4] = NET_RT_IFLIST;
114 if (maxtries-- == 0 || (err && err != ENOMEM)) {
115 fprintf(stderr, "iface_Create: sysctl: %s\n", strerror(err));
119 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) {
120 fprintf(stderr, "iface_Create: sysctl: estimate: %s\n",
125 if ((buf = (char *)malloc(needed)) == NULL) {
126 fprintf(stderr, "iface_Create: malloc failed: %s\n", strerror(errno));
130 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) {
135 } while (buf == NULL);
140 namelen = strlen(name);
142 while (ptr < end && iface == NULL) {
143 ifm = (struct if_msghdr *)ptr; /* On if_msghdr */
144 if (ifm->ifm_type != RTM_IFINFO)
146 dl = (struct sockaddr_dl *)(ifm + 1); /* Single _dl at end */
147 if (dl->sdl_nlen == namelen && !strncmp(name, dl->sdl_data, namelen)) {
148 iface = (struct iface *)malloc(sizeof *iface);
150 fprintf(stderr, "iface_Create: malloc: %s\n", strerror(errno));
153 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));
374 iface_Name(struct iface *iface, const char *name)
380 if ((newname = strdup(name)) == NULL) {
381 log_Printf(LogWARN, "iface name: strdup failed: %s\n", strerror(errno));
385 if ((s = ID0socket(PF_INET, SOCK_DGRAM, 0)) == -1) {
386 log_Printf(LogERROR, "iface name: socket(): %s\n", strerror(errno));
391 strlcpy(ifr.ifr_name, iface->name, sizeof(ifr.ifr_name));
392 ifr.ifr_data = newname;
393 if (ID0ioctl(s, SIOCSIFNAME, (caddr_t)&ifr) < 0) {
394 log_Printf(LogWARN, "iface name: ioctl(SIOCSIFNAME, %s -> %s): %s\n",
395 name, newname, strerror(errno));
401 iface->name = newname;
407 iface_Descr(struct cmdargs const *arg)
412 int s, n, ifdescr_maxlen;
416 if (sysctlbyname("net.ifdescr_maxlen", &ifdescr_maxlen, &sz, NULL, 0) < 0) {
417 log_Printf(LogERROR, "iface descr: sysctl failed: %s\n", strerror(errno));
421 if (ifdescr_maxlen < 1) {
422 log_Printf(LogERROR, "iface descr: sysctl net.ifdescr_maxlen < 1\n");
426 sz = sizeof(char) * ifdescr_maxlen;
427 if ((descr = malloc(sz)) == NULL) {
428 log_Printf(LogERROR, "iface descr: malloc failed: %s\n", strerror(errno));
434 while (n < arg->argc) {
435 if (n > arg->argn && (len = strlcat(descr, " ", sz)) >= sz)
437 if ((len = strlcat(descr, arg->argv[n], sz)) >= sz)
442 log_Printf(LogERROR, "iface descr: description exceeds maximum (%d)\n",
448 if ((s = ID0socket(PF_INET, SOCK_DGRAM, 0)) == -1) {
449 log_Printf(LogERROR, "iface descr: socket(): %s\n", strerror(errno));
454 iface = arg->bundle->iface;
455 strlcpy(ifr.ifr_name, iface->name, sizeof(ifr.ifr_name));
456 ifr.ifr_buffer.length = strlen(descr) + 1;
457 ifr.ifr_buffer.buffer = descr;
458 if (ID0ioctl(s, SIOCSIFDESCR, (caddr_t)&ifr) < 0) {
459 log_Printf(LogWARN, "iface descr: ioctl(SIOCSIFDESCR, %s): %s\n",
460 descr, strerror(errno));
466 iface->descr = descr;
472 iface_Clear(struct iface *iface, struct ncp *ncp, int family, int how)
474 int af, inskip, in6skip, s4 = -1, s6 = -1, *s;
478 inskip = in6skip = how == IFACE_CLEAR_ALL ? 0 : 1;
480 for (n = 0; n < iface->addrs; n++) {
481 af = ncprange_family(&iface->addr[n].ifa);
482 if (family == 0 || family == af) {
483 if (!iface->addr[n].system && (how & IFACE_SYSTEM))
507 if (*s == -1 && (*s = ID0socket(af, SOCK_DGRAM, 0)) == -1)
508 log_Printf(LogERROR, "iface_Clear: socket(): %s\n", strerror(errno));
509 else if (iface_addr_Zap(iface->name, iface->addr + n, *s)) {
510 ncp_IfaceAddrDeleted(ncp, iface->addr + n);
511 bcopy(iface->addr + n + 1, iface->addr + n,
512 (iface->addrs - n - 1) * sizeof *iface->addr);
519 /* Don't bother realloc()ing - we have little to gain */
529 iface_Add(struct iface *iface, struct ncp *ncp, const struct ncprange *ifa,
530 const struct ncpaddr *peer, int how)
534 struct ncpaddr ncplocal;
535 struct iface_addr *addr, newaddr;
537 af = ncprange_family(ifa);
538 if ((s = ID0socket(af, SOCK_DGRAM, 0)) == -1) {
539 log_Printf(LogERROR, "iface_Add: socket(): %s\n", strerror(errno));
542 ncprange_getaddr(ifa, &ncplocal);
544 for (n = 0; n < iface->addrs; n++) {
545 if (ncprange_contains(&iface->addr[n].ifa, &ncplocal) ||
546 ncpaddr_equal(&iface->addr[n].peer, peer)) {
547 /* Replace this sockaddr */
548 if (!(how & IFACE_FORCE_ADD)) {
550 return 0; /* errno = EEXIST; */
553 if (ncprange_equal(&iface->addr[n].ifa, ifa) &&
554 ncpaddr_equal(&iface->addr[n].peer, peer)) {
556 ncp_IfaceAddrAdded(ncp, iface->addr + n);
557 return 1; /* Already there */
560 removed = iface_addr_Zap(iface->name, iface->addr + n, s);
562 ncp_IfaceAddrDeleted(ncp, iface->addr + n);
563 ncprange_copy(&iface->addr[n].ifa, ifa);
564 ncpaddr_copy(&iface->addr[n].peer, peer);
565 if (!iface_addr_Add(iface->name, iface->addr + n, s)) {
567 bcopy(iface->addr + n + 1, iface->addr + n,
568 (iface->addrs - n - 1) * sizeof *iface->addr);
576 ncp_IfaceAddrAdded(ncp, iface->addr + n);
581 addr = (struct iface_addr *)realloc
582 (iface->addr, (iface->addrs + 1) * sizeof iface->addr[0]);
584 log_Printf(LogERROR, "iface_inAdd: realloc: %s\n", strerror(errno));
590 ncprange_copy(&newaddr.ifa, ifa);
591 ncpaddr_copy(&newaddr.peer, peer);
592 newaddr.system = !!(how & IFACE_SYSTEM);
593 if (!iface_addr_Add(iface->name, &newaddr, s)) {
598 if (how & IFACE_ADD_FIRST) {
599 /* Stuff it at the start of our list */
601 bcopy(iface->addr, iface->addr + 1, iface->addrs * sizeof *iface->addr);
606 memcpy(iface->addr + n, &newaddr, sizeof(*iface->addr));
609 ncp_IfaceAddrAdded(ncp, iface->addr + n);
615 iface_Delete(struct iface *iface, struct ncp *ncp, const struct ncpaddr *del)
617 struct ncpaddr found;
621 if ((s = ID0socket(ncpaddr_family(del), SOCK_DGRAM, 0)) == -1) {
622 log_Printf(LogERROR, "iface_Delete: socket(): %s\n", strerror(errno));
626 for (n = res = 0; n < iface->addrs; n++) {
627 ncprange_getaddr(&iface->addr[n].ifa, &found);
628 if (ncpaddr_equal(&found, del)) {
629 if (iface_addr_Zap(iface->name, iface->addr + n, s)) {
630 ncp_IfaceAddrDeleted(ncp, iface->addr + n);
631 bcopy(iface->addr + n + 1, iface->addr + n,
632 (iface->addrs - n - 1) * sizeof *iface->addr);
645 #define IFACE_ADDFLAGS 1
646 #define IFACE_DELFLAGS 2
649 iface_ChangeFlags(const char *ifname, int flags, int how)
654 s = ID0socket(PF_INET, SOCK_DGRAM, 0);
656 log_Printf(LogERROR, "iface_ChangeFlags: socket: %s\n", strerror(errno));
660 memset(&ifrq, '\0', sizeof ifrq);
661 strncpy(ifrq.ifr_name, ifname, sizeof ifrq.ifr_name - 1);
662 ifrq.ifr_name[sizeof ifrq.ifr_name - 1] = '\0';
663 if (ID0ioctl(s, SIOCGIFFLAGS, &ifrq) < 0) {
664 log_Printf(LogERROR, "iface_ChangeFlags: ioctl(SIOCGIFFLAGS): %s\n",
670 new_flags = (ifrq.ifr_flags & 0xffff) | (ifrq.ifr_flagshigh << 16);
672 new_flags = ifrq.ifr_flags & 0xffff;
675 if (how == IFACE_ADDFLAGS)
679 ifrq.ifr_flags = new_flags & 0xffff;
681 ifrq.ifr_flagshigh = new_flags >> 16;
684 if (ID0ioctl(s, SIOCSIFFLAGS, &ifrq) < 0) {
685 log_Printf(LogERROR, "iface_ChangeFlags: ioctl(SIOCSIFFLAGS): %s\n",
692 return 1; /* Success */
696 iface_SetFlags(const char *ifname, int flags)
698 return iface_ChangeFlags(ifname, flags, IFACE_ADDFLAGS);
702 iface_ClearFlags(const char *ifname, int flags)
704 return iface_ChangeFlags(ifname, flags, IFACE_DELFLAGS);
708 iface_Free(struct iface *iface)
717 iface_Destroy(struct iface *iface)
723 if ((s = ID0socket(PF_INET, SOCK_DGRAM, 0)) == -1) {
724 log_Printf(LogERROR, "iface_Destroy: socket(): %s\n", strerror(errno));
726 strlcpy(ifr.ifr_name, iface->name, sizeof(ifr.ifr_name));
727 if (ID0ioctl(s, SIOCIFDESTROY, (caddr_t)&ifr) < 0)
728 log_Printf(LogWARN, "iface_Destroy: ioctl(SIOCIFDESTROY, %s): %s\n",
729 iface->name, strerror(errno));
735 #define if_entry(x) { IFF_##x, #x }
745 if_entry(POINTOPOINT),
760 iface_Show(struct cmdargs const *arg)
762 struct ncpaddr ncpaddr;
763 struct iface *iface = arg->bundle->iface, *current;
771 current = iface_Create(iface->name);
772 flags = iface->flags = current->flags;
775 prompt_Printf(arg->prompt, "%s (idx %d) <", iface->name, iface->index);
776 for (f = 0; f < sizeof if_flags / sizeof if_flags[0]; f++)
777 if ((if_flags[f].flag & flags)) {
778 prompt_Printf(arg->prompt, "%s%s", flags == iface->flags ? "" : ",",
780 flags &= ~if_flags[f].flag;
785 prompt_Printf(arg->prompt, "%s0x%x", flags == iface->flags ? "" : ",",
789 prompt_Printf(arg->prompt, "> mtu %lu has %d address%s:\n", iface->mtu,
790 iface->addrs, iface->addrs == 1 ? "" : "es");
792 for (f = 0; f < iface->addrs; f++) {
793 ncprange_getaddr(&iface->addr[f].ifa, &ncpaddr);
794 switch (ncprange_family(&iface->addr[f].ifa)) {
796 prompt_Printf(arg->prompt, " inet %s --> ", ncpaddr_ntoa(&ncpaddr));
797 if (ncpaddr_family(&iface->addr[f].peer) == AF_UNSPEC)
798 prompt_Printf(arg->prompt, "255.255.255.255");
800 prompt_Printf(arg->prompt, "%s", ncpaddr_ntoa(&iface->addr[f].peer));
801 ncprange_getip4mask(&iface->addr[f].ifa, &mask);
802 prompt_Printf(arg->prompt, " netmask 0x%08lx", (long)ntohl(mask.s_addr));
807 prompt_Printf(arg->prompt, " inet6 %s", ncpaddr_ntoa(&ncpaddr));
808 if (ncpaddr_family(&iface->addr[f].peer) != AF_UNSPEC)
809 prompt_Printf(arg->prompt, " --> %s",
810 ncpaddr_ntoa(&iface->addr[f].peer));
811 ncprange_getwidth(&iface->addr[f].ifa, &width);
812 if (ncpaddr_family(&iface->addr[f].peer) == AF_UNSPEC)
813 prompt_Printf(arg->prompt, " prefixlen %d", width);
814 if ((scopeid = ncprange_scopeid(&iface->addr[f].ifa)) != -1)
815 prompt_Printf(arg->prompt, " scopeid 0x%x", (unsigned)scopeid);
819 prompt_Printf(arg->prompt, "\n");
826 iface_ParseHdr(struct ifa_msghdr *ifam, struct sockaddr *sa[RTAX_MAX])
831 wp = (char *)(ifam + 1);
833 for (rtax = 0; rtax < RTAX_MAX; rtax++)
834 if (ifam->ifam_addrs & (1 << rtax)) {
835 sa[rtax] = (struct sockaddr *)wp;
836 wp += ROUNDUP(sa[rtax]->sa_len);