1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2015 Joyent, Inc.
24 */
25
26 /*
27 * lxinit performs zone-specific initialization prior to handing control to the
28 * guest Linux init. This primarily consists of:
29 *
30 * - Starting ipmgmtd
31 * - Configuring network interfaces
32 * - Adding a default route
33 */
34
35 #include <ctype.h>
36 #include <errno.h>
37 #include <fcntl.h>
38 #include <libgen.h>
39 #include <limits.h>
40 #include <net/if.h>
41 #include <stdarg.h>
42 #include <stdio.h>
43 #include <stdlib.h>
44 #include <string.h>
45 #include <strings.h>
46 #include <stropts.h>
47 #include <sys/ioccom.h>
48 #include <sys/stat.h>
49 #include <sys/systeminfo.h>
50 #include <sys/sockio.h>
51 #include <sys/types.h>
52 #include <sys/wait.h>
53 #include <sys/varargs.h>
54 #include <unistd.h>
55 #include <libintl.h>
56 #include <locale.h>
57 #include <libcmdutils.h>
58
59 #include <netinet/dhcp.h>
60 #include <dhcpagent_util.h>
61 #include <dhcpagent_ipc.h>
62
63 #include <arpa/inet.h>
64 #include <net/route.h>
65 #include <libipadm.h>
66 #include <libzonecfg.h>
67 #include <libinetutil.h>
68 #include <sys/lx_brand.h>
69
70 #include "run_command.h"
71
72 static void lxi_err(char *msg, ...) __NORETURN;
73 static void lxi_err(char *msg, ...);
74
75 #define IPMGMTD_PATH "/lib/inet/ipmgmtd"
76 #define IN_NDPD_PATH "/usr/lib/inet/in.ndpd"
77
78 #define PREFIX_LOG_WARN "lx_init warn: "
79 #define PREFIX_LOG_ERR "lx_init err: "
80
81 #define RTMBUFSZ (sizeof (struct rt_msghdr) + \
82 (3 * sizeof (struct sockaddr_in)))
83
84 ipadm_handle_t iph;
85
86 static void
87 lxi_err(char *msg, ...)
88 {
89 char buf[1024];
90 int len;
91 va_list ap;
92
93 va_start(ap, msg);
94 /*LINTED*/
95 len = vsnprintf(buf, sizeof (buf), msg, ap);
96 va_end(ap);
97
98 (void) write(1, PREFIX_LOG_ERR, strlen(PREFIX_LOG_ERR));
99 (void) write(1, buf, len);
100 (void) write(1, "\n", 1);
101
102 /*
103 * Since a non-zero exit will cause the zone to reboot, a pause here
104 * will prevent a mis-configured zone from spinning in a reboot loop.
105 */
106 pause();
107 exit(1);
108 /*NOTREACHED*/
109 }
110
111 static void
112 lxi_warn(char *msg, ...)
113 {
114 char buf[1024];
115 int len;
116 va_list ap;
117
118 va_start(ap, msg);
119 /*LINTED*/
120 len = vsnprintf(buf, sizeof (buf), msg, ap);
121 va_end(ap);
122
123 (void) write(1, PREFIX_LOG_WARN, strlen(PREFIX_LOG_WARN));
124 (void) write(1, buf, len);
125 (void) write(1, "\n", 1);
126 }
127
128 static void
129 lxi_log_open()
130 {
131 int fd = open("/dev/console", O_WRONLY);
132
133 if (fd < 0) {
134 /* hard to log at this point... */
135 exit(1);
136 } else if (fd != 1) {
137 /*
138 * Use stdout as the log fd. Init should start with no files
139 * open, so we should be required to perform this relocation
140 * every time.
141 */
142 if (dup2(fd, 1) != 1) {
143 exit(1);
144 }
145 }
146 }
147
148 static void
149 lxi_log_close()
150 {
151 (void) close(0);
152 (void) close(1);
153 }
154
155 static zone_dochandle_t
156 lxi_config_open()
157 {
158 zoneid_t zoneid;
159 char zonename[ZONENAME_MAX];
160 zone_dochandle_t handle;
161 zone_iptype_t iptype;
162 int res;
163
164 zoneid = getzoneid();
165 if (getzonenamebyid(zoneid, zonename, sizeof (zonename)) < 0) {
166 lxi_err("could not determine zone name");
167 }
168
169 if ((handle = zonecfg_init_handle()) == NULL)
170 lxi_err("internal libzonecfg.so.1 error", 0);
171
172 if ((res = zonecfg_get_handle(zonename, handle)) != Z_OK) {
173 zonecfg_fini_handle(handle);
174 lxi_err("could not locate zone config %d", res);
175 }
176
177 /*
178 * Only exclusive stack is supported.
179 */
180 if (zonecfg_get_iptype(handle, &iptype) != Z_OK ||
181 iptype != ZS_EXCLUSIVE) {
182 zonecfg_fini_handle(handle);
183 lxi_err("lx zones do not support shared IP stacks");
184 }
185
186 return (handle);
187
188 }
189
190 static int
191 zone_find_attr(struct zone_res_attrtab *attrs, const char *name,
192 const char **result)
193 {
194 while (attrs != NULL) {
195 if (strncmp(attrs->zone_res_attr_name, name,
196 MAXNAMELEN) == 0) {
197 *result = attrs->zone_res_attr_value;
198 return (0);
199 }
200 attrs = attrs->zone_res_attr_next;
201 }
202 return (-1);
203 }
204
205 void
206 lxi_svc_start(char *name, char *path, char *fmri)
207 {
208 pid_t pid;
209 int status;
210 char *const argv[] = {
211 name,
212 NULL
213 };
214 char *const envp[] = {
215 fmri,
216 NULL
217 };
218
219 pid = fork();
220 if (pid == -1) {
221 lxi_err("fork() failed: %s", strerror(errno));
222 }
223
224 if (pid == 0) {
225 /* child */
226 const char *zroot = zone_get_nroot();
227 char cmd[MAXPATHLEN];
228
229 /*
230 * Construct the full path to the binary, including the native
231 * system root (e.g. "/native") if in use for this zone:
232 */
233 (void) snprintf(cmd, sizeof (cmd), "%s%s", zroot != NULL ?
234 zroot : "", path);
235
236 execve(cmd, argv, envp);
237
238 lxi_err("execve(%s) failed: %s", cmd, strerror(errno));
239 /* NOTREACHED */
240 }
241
242 /* parent */
243 while (wait(&status) != pid) {
244 /* EMPTY */;
245 }
246
247 if (WIFEXITED(status)) {
248 if (WEXITSTATUS(status) != 0) {
249 lxi_err("%s[%d] exited: %d", name,
250 (int)pid, WEXITSTATUS(status));
251 }
252 } else if (WIFSIGNALED(status)) {
253 lxi_err("%s[%d] died on signal: %d", name,
254 (int)pid, WTERMSIG(status));
255 } else {
256 lxi_err("%s[%d] failed in unknown way", name,
257 (int)pid);
258 }
259 }
260
261 void
262 lxi_net_ipmgmtd_start()
263 {
264 lxi_svc_start("ipmgmtd", IPMGMTD_PATH,
265 "SMF_FMRI=svc:/network/ip-interface-management:default");
266 }
267
268 void
269 lxi_net_ndpd_start()
270 {
271 lxi_svc_start("in.ndpd", IN_NDPD_PATH,
272 "SMF_FMRI=svc:/network/routing/ndp:default");
273 }
274
275
276 static void
277 lxi_net_ipadm_open()
278 {
279 ipadm_status_t status;
280
281 if ((status = ipadm_open(&iph, IPH_LEGACY)) != IPADM_SUCCESS) {
282 lxi_err("Error opening ipadm handle: %s",
283 ipadm_status2str(status));
284 }
285 }
286
287 static void
288 lxi_net_ipadm_close()
289 {
290 ipadm_close(iph);
291 }
292
293 void
294 lxi_net_plumb(const char *iface)
295 {
296 ipadm_status_t status;
297 char ifbuf[LIFNAMSIZ];
298
299 /* ipadm_create_if stomps on ifbuf, so create a copy: */
300 (void) strncpy(ifbuf, iface, sizeof (ifbuf));
301
302 if ((status = ipadm_create_if(iph, ifbuf, AF_INET, IPADM_OPT_ACTIVE))
303 != IPADM_SUCCESS) {
304 lxi_err("ipadm_create_if error %d: %s/v4: %s",
305 status, iface, ipadm_status2str(status));
306 }
307
308 if ((status = ipadm_create_if(iph, ifbuf, AF_INET6, IPADM_OPT_ACTIVE))
309 != IPADM_SUCCESS) {
310 lxi_err("ipadm_create_if error %d: %s/v6: %s",
311 status, iface, ipadm_status2str(status));
312 }
313 }
314
315 static int
316 lxi_getif(int af, char *iface, int len, boolean_t first_ipv4_configured)
317 {
318 struct lifreq lifr;
319 int s = socket(af, SOCK_DGRAM, 0);
320 if (s < 0) {
321 lxi_warn("socket error %d: bringing up %s: %s",
322 errno, iface, strerror(errno));
323 return (-1);
324 }
325
326 /*
327 * We need a new logical interface for every IP address we add, except
328 * for the very first IPv4 address.
329 */
330 if (af == AF_INET6 || first_ipv4_configured) {
331 (void) strncpy(lifr.lifr_name, iface, sizeof (lifr.lifr_name));
332 (void) memset(&lifr.lifr_addr, 0, sizeof (lifr.lifr_addr));
333 if (ioctl(s, SIOCLIFADDIF, (caddr_t)&lifr) < 0) {
334 if (close(s) != 0) {
335 lxi_warn("failed to close socket: %s\n",
336 strerror(errno));
337 }
338 return (-1);
339 }
340 (void) strncpy(iface, lifr.lifr_name, len);
341 }
342
343 if (close(s) != 0) {
344 lxi_warn("failed to close socket: %s\n",
345 strerror(errno));
346 }
347 return (0);
348 }
349
350 static int
351 lxi_iface_ip(const char *origiface, const char *addr,
352 boolean_t *first_ipv4_configured)
353 {
354 static int addrnum = 0;
355 ipadm_status_t status;
356 ipadm_addrobj_t ipaddr = NULL;
357 char iface[LIFNAMSIZ];
358 char aobjname[IPADM_AOBJSIZ];
359 int af, err = 0;
360
361 (void) strncpy(iface, origiface, sizeof (iface));
362
363 af = strstr(addr, ":") == NULL ? AF_INET : AF_INET6;
364 if (lxi_getif(af, iface, sizeof (iface), *first_ipv4_configured) != 0) {
365 lxi_warn("failed to create new logical interface "
366 "on %s: %s", origiface, strerror(errno));
367 return (-1);
368 }
369
370 (void) snprintf(aobjname, IPADM_AOBJSIZ, "%s/addr%d", iface,
371 addrnum++);
372
373 if ((status = ipadm_create_addrobj(IPADM_ADDR_STATIC, aobjname,
374 &ipaddr)) != IPADM_SUCCESS) {
375 lxi_warn("ipadm_create_addrobj error %d: addr %s, "
376 "interface %s: %s\n", status, addr, iface,
377 ipadm_status2str(status));
378 return (-2);
379 }
380
381 if ((status = ipadm_set_addr(ipaddr, addr, AF_UNSPEC))
382 != IPADM_SUCCESS) {
383 lxi_warn("ipadm_set_addr error %d: addr %s"
384 ", interface %s: %s\n", status, addr,
385 iface, ipadm_status2str(status));
386 err = -3;
387 goto done;
388 }
389
390 if ((status = ipadm_create_addr(iph, ipaddr,
391 IPADM_OPT_ACTIVE | IPADM_OPT_UP)) != IPADM_SUCCESS) {
392 lxi_warn("ipadm_create_addr error for %s: %s\n", iface,
393 ipadm_status2str(status));
394 err = -4;
395 goto done;
396 }
397
398 if (af == AF_INET) {
399 *first_ipv4_configured = B_TRUE;
400 }
401
402 done:
403 ipadm_destroy_addrobj(ipaddr);
404 return (err);
405 }
406
407 static int
408 lxi_iface_dhcp(const char *origiface, boolean_t *first_ipv4_configured)
409 {
410 dhcp_ipc_request_t *dhcpreq = NULL;
411 dhcp_ipc_reply_t *dhcpreply = NULL;
412 int err = 0, timeout = 5;
413 char iface[LIFNAMSIZ];
414
415 (void) strncpy(iface, origiface, sizeof (iface));
416
417 if (lxi_getif(AF_INET, iface, sizeof (iface), *first_ipv4_configured)
418 != 0) {
419 lxi_warn("failed to create new logical interface "
420 "on %s: %s", origiface, strerror(errno));
421 return (-1);
422 }
423
424 if (dhcp_start_agent(timeout) != 0) {
425 lxi_err("Failed to start dhcpagent\n");
426 /* NOTREACHED */
427 }
428
429 dhcpreq = dhcp_ipc_alloc_request(DHCP_START, iface,
430 NULL, 0, DHCP_TYPE_NONE);
431 if (dhcpreq == NULL) {
432 lxi_warn("Unable to allocate memory "
433 "to start DHCP on %s\n", iface);
434 return (-1);
435 }
436
437 err = dhcp_ipc_make_request(dhcpreq, &dhcpreply, timeout);
438 if (err != 0) {
439 free(dhcpreq);
440 lxi_warn("Failed to start DHCP on %s: %s\n", iface,
441 dhcp_ipc_strerror(err));
442 return (-1);
443 }
444 err = dhcpreply->return_code;
445 if (err != 0) {
446 lxi_warn("Failed to start DHCP on %s: %s\n", iface,
447 dhcp_ipc_strerror(err));
448 goto done;
449 }
450
451 *first_ipv4_configured = B_TRUE;
452
453 done:
454 free(dhcpreq);
455 free(dhcpreply);
456 return (err);
457 }
458
459 /*
460 * Initialize an IPv6 link-local address on a given interface
461 */
462 static int
463 lxi_iface_ipv6_link_local(const char *iface)
464 {
465 struct lifreq lifr;
466 int s;
467
468 s = socket(AF_INET6, SOCK_DGRAM, 0);
469 if (s == -1) {
470 lxi_warn("socket error %d: bringing up %s: %s",
471 errno, iface, strerror(errno));
472 }
473
474 (void) strncpy(lifr.lifr_name, iface, sizeof (lifr.lifr_name));
475 if (ioctl(s, SIOCGLIFFLAGS, (caddr_t)&lifr) < 0) {
476 lxi_warn("SIOCGLIFFLAGS error %d: bringing up %s: %s",
477 errno, iface, strerror(errno));
478 return (-1);
479 }
480
481 lifr.lifr_flags |= IFF_UP;
482 if (ioctl(s, SIOCSLIFFLAGS, (caddr_t)&lifr) < 0) {
483 lxi_warn("SIOCSLIFFLAGS error %d: bringing up %s: %s",
484 errno, iface, strerror(errno));
485 return (-1);
486 }
487
488 (void) close(s);
489 return (0);
490 }
491
492 static int
493 lxi_iface_gateway(const char *iface, const char *dst, int dstpfx,
494 const char *gwaddr)
495 {
496 int idx, len, sockfd;
497 char rtbuf[RTMBUFSZ];
498 struct rt_msghdr *rtm = (struct rt_msghdr *)rtbuf;
499 struct sockaddr_in *dst_sin = (struct sockaddr_in *)
500 (rtbuf + sizeof (struct rt_msghdr));
501 struct sockaddr_in *gw_sin = (struct sockaddr_in *)(dst_sin + 1);
502 struct sockaddr_in *netmask_sin = (struct sockaddr_in *)(gw_sin + 1);
503
504 (void) bzero(rtm, RTMBUFSZ);
505 rtm->rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK;
506 rtm->rtm_flags = RTF_UP | RTF_STATIC | RTF_GATEWAY;
507 rtm->rtm_msglen = sizeof (rtbuf);
508 rtm->rtm_pid = getpid();
509 rtm->rtm_type = RTM_ADD;
510 rtm->rtm_version = RTM_VERSION;
511
512
513 /*
514 * The destination and netmask components have already been zeroed,
515 * which represents the default gateway. If we were passed a more
516 * specific destination network, use that instead.
517 */
518 dst_sin->sin_family = AF_INET;
519 netmask_sin->sin_family = AF_INET;
520 if (dst != NULL) {
521 struct sockaddr *mask = (struct sockaddr *)netmask_sin;
522
523 if ((inet_pton(AF_INET, dst, &(dst_sin->sin_addr))) != 1 ||
524 plen2mask(dstpfx, AF_INET, mask) != 0) {
525 lxi_warn("bad destination network %s/%d: %s", dst,
526 dstpfx, strerror(errno));
527 return (-1);
528 }
529 }
530
531 if ((inet_pton(AF_INET, gwaddr, &(gw_sin->sin_addr))) != 1) {
532 lxi_warn("bad gateway %s: %s", gwaddr, strerror(errno));
533 return (-1);
534 }
535
536 if (iface != NULL) {
537 if ((idx = if_nametoindex(iface)) == 0) {
538 lxi_warn("unable to get interface index for %s: %s\n",
539 iface, strerror(errno));
540 return (-1);
541 }
542 rtm->rtm_index = idx;
543 }
544
545 if ((sockfd = socket(PF_ROUTE, SOCK_RAW, AF_INET)) < 0) {
546 lxi_warn("socket(PF_ROUTE): %s\n", strerror(errno));
547 return (-1);
548 }
549
550 if ((len = write(sockfd, rtbuf, rtm->rtm_msglen)) < 0) {
551 lxi_warn("could not write rtmsg: %s", strerror(errno));
552 close(sockfd);
553 return (-1);
554 } else if (len < rtm->rtm_msglen) {
555 lxi_warn("write() rtmsg incomplete");
556 close(sockfd);
557 return (-1);
558 }
559
560 close(sockfd);
561 return (0);
562 }
563
564 static void
565 lxi_net_loopback()
566 {
567 const char *iface = "lo0";
568 boolean_t first_ipv4_configured = B_FALSE;
569
570 lxi_net_plumb(iface);
571 (void) lxi_iface_ip(iface, "127.0.0.1/8", &first_ipv4_configured);
572 (void) lxi_iface_ipv6_link_local(iface);
573 }
574
575
576 /*
577 * This function is used when the "ips" property doesn't exist in a zone's
578 * configuration. It may be an older configuration, so we should search for
579 * "ip" and "netmask" and convert them into the new format.
580 */
581 static int
582 lxi_get_old_ip(struct zone_res_attrtab *attrs, const char **ipaddrs,
583 char *cidraddr, int len)
584 {
585
586 const char *netmask;
587 int prefixlen;
588 struct sockaddr_in mask_sin;
589
590 lxi_warn("Could not find \"ips\" property for zone. Looking "
591 "for older \"ip\" and \"netmask\" properties, instead.");
592
593 if (zone_find_attr(attrs, "ip", ipaddrs) != 0) {
594 return (-1);
595 }
596
597 if (strcmp(*ipaddrs, "dhcp") == 0) {
598 return (0);
599 }
600
601 if (zone_find_attr(attrs, "netmask", &netmask) != 0) {
602 lxi_err("could not find netmask for interface");
603 /* NOTREACHED */
604 }
605
606 /* Convert the netmask to a number */
607 mask_sin.sin_family = AF_INET;
608 if (inet_pton(AF_INET, netmask, &mask_sin.sin_addr) != 1) {
609 lxi_err("invalid netmask address: %s\n",
610 strerror(errno));
611 /* NOTREACHED */
612 }
613 prefixlen = mask2plen((struct sockaddr *)&mask_sin);
614
615 /*
616 * Write out the IP address in the new format and use
617 * that instead
618 */
619 (void) snprintf(cidraddr, len, "%s/%d", *ipaddrs, prefixlen);
620
621 *ipaddrs = cidraddr;
622 return (0);
623 }
624
625 static void
626 lxi_net_setup(zone_dochandle_t handle)
627 {
628 struct zone_nwiftab lookup;
629 boolean_t do_addrconf = B_FALSE;
630
631 if (zonecfg_setnwifent(handle) != Z_OK)
632 return;
633 while (zonecfg_getnwifent(handle, &lookup) == Z_OK) {
634 const char *iface = lookup.zone_nwif_physical;
635 struct zone_res_attrtab *attrs = lookup.zone_nwif_attrp;
636 const char *ipaddrs, *primary, *gateway;
637 char ipaddrs_copy[MAXNAMELEN], cidraddr[BUFSIZ],
638 *ipaddr, *tmp, *lasts;
639 boolean_t first_ipv4_configured = B_FALSE;
640 boolean_t *ficp = &first_ipv4_configured;
641
642 lxi_net_plumb(iface);
643 if (zone_find_attr(attrs, "ips", &ipaddrs) != 0 &&
644 lxi_get_old_ip(attrs, &ipaddrs, cidraddr, BUFSIZ) != 0) {
645 lxi_warn("Could not find a valid network configuration "
646 "for the %s interface", iface);
647 continue;
648 }
649
650 if (lxi_iface_ipv6_link_local(iface) != 0) {
651 lxi_warn("unable to bring up link-local address on "
652 "interface %s", iface);
653 }
654
655 /*
656 * If we're going to be doing DHCP, we have to do it first since
657 * dhcpagent doesn't like to operate on non-zero logical
658 * interfaces.
659 */
660 if (strstr(ipaddrs, "dhcp") != NULL &&
661 lxi_iface_dhcp(iface, ficp) != 0) {
662 lxi_warn("Failed to start DHCP on %s\n", iface);
663 }
664
665 /*
666 * Copy the ipaddrs string, since strtok_r will write NUL
667 * characters into it.
668 */
669 (void) strlcpy(ipaddrs_copy, ipaddrs, MAXNAMELEN);
670 tmp = ipaddrs_copy;
671
672 /*
673 * Iterate over each IP and then set it up on the interface.
674 */
675 while ((ipaddr = strtok_r(tmp, ",", &lasts)) != NULL) {
676 tmp = NULL;
677 if (strcmp(ipaddr, "addrconf") == 0) {
678 do_addrconf = B_TRUE;
679 } else if (strcmp(ipaddr, "dhcp") == 0) {
680 continue;
681 } else if (lxi_iface_ip(iface, ipaddr, ficp) < 0) {
682 lxi_warn("Unable to add new IP address (%s) "
683 "to interface %s", ipaddr, iface);
684 }
685 }
686
687 if (zone_find_attr(attrs, "primary", &primary) == 0 &&
688 strncmp(primary, "true", MAXNAMELEN) == 0 &&
689 zone_find_attr(attrs, "gateway", &gateway) == 0) {
690 lxi_iface_gateway(iface, NULL, 0, gateway);
691 }
692 }
693
694 if (do_addrconf) {
695 lxi_net_ndpd_start();
696 }
697
698 (void) zonecfg_endnwifent(handle);
699 }
700
701 static void
702 lxi_net_static_route(const char *line)
703 {
704 /*
705 * Each static route line is a string of the form:
706 *
707 * "10.77.77.2|10.1.1.0/24|false"
708 *
709 * i.e. gateway address, destination network, and whether this is
710 * a "link local" route or a next hop route.
711 */
712 custr_t *cu = NULL;
713 char *gw = NULL, *dst = NULL;
714 int pfx = -1;
715 int i;
716
717 if (custr_alloc(&cu) != 0) {
718 lxi_err("custr_alloc failure");
719 }
720
721 for (i = 0; line[i] != '\0'; i++) {
722 if (gw == NULL) {
723 if (line[i] == '|') {
724 if ((gw = strdup(custr_cstr(cu))) == NULL) {
725 lxi_err("strdup failure");
726 }
727 custr_reset(cu);
728 } else {
729 if (custr_appendc(cu, line[i]) != 0) {
730 lxi_err("custr_appendc failure");
731 }
732 }
733 continue;
734 }
735
736 if (dst == NULL) {
737 if (line[i] == '/') {
738 if ((dst = strdup(custr_cstr(cu))) == NULL) {
739 lxi_err("strdup failure");
740 }
741 custr_reset(cu);
742 } else {
743 if (custr_appendc(cu, line[i]) != 0) {
744 lxi_err("custr_appendc failure");
745 }
746 }
747 continue;
748 }
749
750 if (pfx == -1) {
751 if (line[i] == '|') {
752 pfx = atoi(custr_cstr(cu));
753 custr_reset(cu);
754 } else {
755 if (custr_appendc(cu, line[i]) != 0) {
756 lxi_err("custr_appendc failure");
757 }
758 }
759 continue;
760 }
761
762 if (custr_appendc(cu, line[i]) != 0) {
763 lxi_err("custr_appendc failure");
764 }
765 }
766
767 /*
768 * We currently only support "next hop" routes, so ensure that
769 * "linklocal" is false:
770 */
771 if (strcmp(custr_cstr(cu), "false") != 0) {
772 lxi_warn("invalid static route: %s", line);
773 }
774
775 if (lxi_iface_gateway(NULL, dst, pfx, gw) != 0) {
776 lxi_err("failed to add route: %s/%d -> %s", dst, pfx, gw);
777 }
778
779 custr_free(cu);
780 free(gw);
781 free(dst);
782 }
783
784 static void
785 lxi_net_static_routes(void)
786 {
787 const char *cmd = "/native/usr/lib/brand/lx/routeinfo";
788 char *const argv[] = { "routeinfo", NULL };
789 char *const envp[] = { NULL };
790 int code;
791 struct stat st;
792 char errbuf[512];
793
794 if (stat(cmd, &st) != 0 || !S_ISREG(st.st_mode)) {
795 /*
796 * This binary is (potentially) shipped from another
797 * consolidation. If it does not exist, then the platform does
798 * not currently support static routes for LX-branded zones.
799 */
800 return;
801 }
802
803 /*
804 * Run the command, firing the callback for each line that it
805 * outputs. When this function returns, static route processing
806 * is complete.
807 */
808 if (run_command(cmd, argv, envp, errbuf, sizeof (errbuf),
809 lxi_net_static_route, &code) != 0 || code != 0) {
810 lxi_err("failed to run \"%s\": %s", cmd, errbuf);
811 }
812 }
813
814 static void
815 lxi_config_close(zone_dochandle_t handle)
816 {
817 zonecfg_fini_handle(handle);
818 }
819
820 static void
821 lxi_init_exec(char **argv)
822 {
823 const char *cmd = "/sbin/init";
824 char *const envp[] = { "container=zone", NULL };
825 int e;
826
827 argv[0] = "init";
828
829 /*
830 * systemd uses the 'container' env var to determine it is running
831 * inside a container. It only supports a few well-known types and
832 * treats anything else as 'other' but this is enough to make it
833 * behave better inside a zone. See 'detect_container' in systemd.
834 */
835 execve(cmd, argv, envp);
836 e = errno;
837
838 /*
839 * Because stdout was closed prior to exec, it must be opened again in
840 * the face of failure to log the error.
841 */
842 lxi_log_open();
843 lxi_err("execve(%s) failed: %s", cmd, strerror(e));
844 }
845
846 /*ARGSUSED*/
847 int
848 main(int argc, char *argv[])
849 {
850 zone_dochandle_t handle;
851
852 lxi_log_open();
853
854 lxi_net_ipmgmtd_start();
855 lxi_net_ipadm_open();
856
857 handle = lxi_config_open();
858 lxi_net_loopback();
859 lxi_net_setup(handle);
860 lxi_config_close(handle);
861
862 lxi_net_static_routes();
863
864 lxi_net_ipadm_close();
865
866 lxi_log_close();
867
868 lxi_init_exec(argv);
869
870 /* NOTREACHED */
871 return (0);
872 }