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 (c) 2010, Oracle and/or its affiliates. All rights reserved.
24  * Copyright (c) 2016-2017, Chris Fraire <cfraire@me.com>.
25  * Copyright 2021, Tintri by DDN. All rights reserved.
26  * Copyright 2022, Oxide Computer Company.
27  */
28 
29 /*
30  * Main door handler functions used by ipmgmtd to process the different door
31  * call requests, issued by the library libipadm.so.
32  */
33 
34 #include <alloca.h>
35 #include <pwd.h>
36 #include <auth_attr.h>
37 #include <secdb.h>
38 #include <stdlib.h>
39 #include <stdio.h>
40 #include <string.h>
41 #include <strings.h>
42 #include <errno.h>
43 #include <assert.h>
44 #include <libnvpair.h>
45 #include "ipmgmt_impl.h"
46 
47 
48 static void ipmgmt_common_handler(char *, char *, db_wfunc_t *);
49 
50 /* Handler declaration for each door command */
51 typedef void ipmgmt_door_handler_t(void *argp);
52 
53 static ipmgmt_door_handler_t	ipmgmt_getaddr_handler,
54 				ipmgmt_getprop_handler,
55 				ipmgmt_getif_handler,
56 				ipmgmt_initif_handler,
57 				ipmgmt_aobjop_handler,
58 				ipmgmt_resetaddr_handler,
59 				ipmgmt_setif_handler,
60 				ipmgmt_resetif_handler,
61 				ipmgmt_resetprop_handler,
62 				ipmgmt_setaddr_handler,
63 				ipmgmt_setprop_handler,
64 				ipmgmt_ipmp_update_handler;
65 
66 typedef struct ipmgmt_door_info_s {
67 	uint_t			idi_cmd;
68 	boolean_t		idi_set;
69 	ipmgmt_door_handler_t	*idi_handler;
70 } ipmgmt_door_info_t;
71 
72 /* maps door commands to door handler functions */
73 static ipmgmt_door_info_t i_ipmgmt_door_info_tbl[] = {
74 	{ IPMGMT_CMD_SETPROP,		B_TRUE,  ipmgmt_setprop_handler },
75 	{ IPMGMT_CMD_SETIF,		B_TRUE,  ipmgmt_setif_handler },
76 	{ IPMGMT_CMD_SETADDR,		B_TRUE,  ipmgmt_setaddr_handler },
77 	{ IPMGMT_CMD_GETPROP,		B_FALSE, ipmgmt_getprop_handler },
78 	{ IPMGMT_CMD_GETIF,		B_FALSE, ipmgmt_getif_handler },
79 	{ IPMGMT_CMD_GETADDR,		B_FALSE, ipmgmt_getaddr_handler },
80 	{ IPMGMT_CMD_RESETIF,		B_TRUE,  ipmgmt_resetif_handler },
81 	{ IPMGMT_CMD_RESETADDR,		B_TRUE,  ipmgmt_resetaddr_handler },
82 	{ IPMGMT_CMD_RESETPROP,		B_TRUE,  ipmgmt_resetprop_handler },
83 	{ IPMGMT_CMD_INITIF,		B_TRUE,  ipmgmt_initif_handler },
84 	{ IPMGMT_CMD_ADDROBJ_LOOKUPADD,	B_TRUE,  ipmgmt_aobjop_handler },
85 	{ IPMGMT_CMD_ADDROBJ_SETLIFNUM,	B_TRUE,  ipmgmt_aobjop_handler },
86 	{ IPMGMT_CMD_ADDROBJ_ADD,	B_TRUE,  ipmgmt_aobjop_handler },
87 	{ IPMGMT_CMD_AOBJNAME2ADDROBJ,	B_FALSE, ipmgmt_aobjop_handler },
88 	{ IPMGMT_CMD_LIF2ADDROBJ,	B_FALSE, ipmgmt_aobjop_handler },
89 	{ IPMGMT_CMD_IPMP_UPDATE,	B_FALSE, ipmgmt_ipmp_update_handler},
90 	{ 0, 0, NULL },
91 };
92 
93 /*
94  * The main server procedure function that gets invoked for any of the incoming
95  * door commands. Inside this function we identify the incoming command and
96  * invoke the right door handler function.
97  */
98 /* ARGSUSED */
99 void
ipmgmt_handler(void * cookie,char * argp,size_t argsz,door_desc_t * dp,uint_t n_desc)100 ipmgmt_handler(void *cookie, char *argp, size_t argsz, door_desc_t *dp,
101     uint_t n_desc)
102 {
103 	ipmgmt_door_info_t	*infop = NULL;
104 	ipmgmt_retval_t		retval;
105 	int			i;
106 	uint_t			err;
107 	ucred_t			*cred = NULL;
108 
109 	for (i = 0; i_ipmgmt_door_info_tbl[i].idi_cmd != 0; i++) {
110 		if (i_ipmgmt_door_info_tbl[i].idi_cmd ==
111 		    ((ipmgmt_arg_t *)(void *)argp)->ia_cmd) {
112 			infop = &i_ipmgmt_door_info_tbl[i];
113 			break;
114 		}
115 	}
116 
117 	if (infop == NULL) {
118 		ipmgmt_log(LOG_ERR, "Invalid door command specified");
119 		err = EINVAL;
120 		goto fail;
121 	}
122 
123 	/* check for solaris.network.interface.config authorization */
124 	if (infop->idi_set) {
125 		uid_t		uid;
126 		struct passwd	pwd;
127 		char		buf[1024];
128 
129 		if (door_ucred(&cred) != 0) {
130 			err = errno;
131 			ipmgmt_log(LOG_ERR, "Could not get user credentials.");
132 			goto fail;
133 		}
134 		uid = ucred_getruid(cred);
135 		if ((int)uid < 0) {
136 			err = errno;
137 			ipmgmt_log(LOG_ERR, "Could not get user id.");
138 			goto fail;
139 		}
140 		if (getpwuid_r(uid, &pwd, buf, sizeof (buf)) ==
141 		    NULL) {
142 			err = errno;
143 			ipmgmt_log(LOG_ERR, "Could not get password entry.");
144 			goto fail;
145 		}
146 		if (chkauthattr(NETWORK_INTERFACE_CONFIG_AUTH,
147 		    pwd.pw_name) != 1) {
148 			err = EPERM;
149 			ipmgmt_log(LOG_ERR, "Not authorized for operation.");
150 			goto fail;
151 		}
152 		ucred_free(cred);
153 	}
154 
155 	/* individual handlers take care of calling door_return */
156 	infop->idi_handler((void *)argp);
157 	return;
158 fail:
159 	ucred_free(cred);
160 	retval.ir_err = err;
161 	(void) door_return((char *)&retval, sizeof (retval), NULL, 0);
162 }
163 
164 /*
165  * Handles the door command IPMGMT_CMD_GETPROP. It retrieves the persisted
166  * property value for the given property.
167  */
168 static void
ipmgmt_getprop_handler(void * argp)169 ipmgmt_getprop_handler(void *argp)
170 {
171 	ipmgmt_prop_arg_t	*pargp = argp;
172 	ipmgmt_getprop_rval_t	rval, *rvalp = &rval;
173 
174 	assert(pargp->ia_cmd == IPMGMT_CMD_GETPROP);
175 
176 	rvalp->ir_err = ipmgmt_db_walk(ipmgmt_db_getprop, pargp, IPADM_DB_READ);
177 	if (rvalp->ir_err == 0)
178 		(void) strlcpy(rvalp->ir_pval, pargp->ia_pval,
179 		    sizeof (rvalp->ir_pval));
180 	(void) door_return((char *)rvalp, sizeof (*rvalp), NULL, 0);
181 }
182 
183 /*
184  * Handles the door command IPMGMT_CMD_SETPROP. It persists the property value
185  * for the given property in the DB.
186  */
187 static void
ipmgmt_setprop_handler(void * argp)188 ipmgmt_setprop_handler(void *argp)
189 {
190 	ipmgmt_prop_arg_t	*pargp = argp;
191 	ipmgmt_retval_t		rval;
192 	ipadm_dbwrite_cbarg_t	cb;
193 	nvlist_t		*nvl = NULL;
194 	int			err;
195 
196 	assert(pargp->ia_cmd == IPMGMT_CMD_SETPROP);
197 
198 	if ((err = nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0)) != 0)
199 		goto fail;
200 	if (pargp->ia_module[0] != '\0' &&
201 	    (err = nvlist_add_string(nvl, IPADM_NVP_PROTONAME,
202 	    pargp->ia_module)) != 0) {
203 		goto fail;
204 	}
205 	if (pargp->ia_ifname[0] != '\0' &&
206 	    (err = nvlist_add_string(nvl, IPADM_NVP_IFNAME,
207 	    pargp->ia_ifname)) != 0)
208 		goto fail;
209 	if (pargp->ia_aobjname[0] != '\0' &&
210 	    (err = nvlist_add_string(nvl, IPADM_NVP_AOBJNAME,
211 	    pargp->ia_aobjname)) != 0)
212 		goto fail;
213 	if ((err = nvlist_add_string(nvl, pargp->ia_pname,
214 	    pargp->ia_pval)) != 0)
215 		goto fail;
216 
217 	cb.dbw_nvl = nvl;
218 	cb.dbw_flags = pargp->ia_flags;
219 	err = ipmgmt_db_walk(ipmgmt_db_update, &cb, IPADM_DB_WRITE);
220 fail:
221 	nvlist_free(nvl);
222 	rval.ir_err = err;
223 	(void) door_return((char *)&rval, sizeof (rval), NULL, 0);
224 }
225 
226 /*
227  * Helper function for ipmgmt_setaddr_handler().
228  * It converts the nvlist_t, `nvl', to aobjmap node `nodep'.
229  */
230 static int
i_ipmgmt_nvl2aobjnode(nvlist_t * nvl,ipmgmt_aobjmap_t * nodep)231 i_ipmgmt_nvl2aobjnode(nvlist_t *nvl, ipmgmt_aobjmap_t *nodep)
232 {
233 	char			*aobjname = NULL, *ifname = NULL;
234 	int32_t			lnum;
235 	nvlist_t		*nvladdr;
236 	sa_family_t		af = AF_UNSPEC;
237 	ipadm_addr_type_t	addrtype = IPADM_ADDR_NONE;
238 	int			err = 0;
239 
240 	/*
241 	 * Retrieve all the information needed to build '*nodep' from
242 	 * nvlist_t nvl.
243 	 */
244 	if ((err = nvlist_lookup_string(nvl, IPADM_NVP_AOBJNAME,
245 	    &aobjname)) != 0 ||
246 	    (err = nvlist_lookup_string(nvl, IPADM_NVP_IFNAME, &ifname)) != 0 ||
247 	    (err = nvlist_lookup_int32(nvl, IPADM_NVP_LIFNUM, &lnum)) != 0) {
248 		return (err);
249 	}
250 	if (nvlist_exists(nvl, IPADM_NVP_IPV4ADDR)) {
251 		af = AF_INET;
252 		addrtype = IPADM_ADDR_STATIC;
253 	} else if (nvlist_lookup_nvlist(nvl, IPADM_NVP_DHCP, &nvladdr) == 0) {
254 		char	*reqhost;
255 
256 		af = AF_INET;
257 		addrtype = IPADM_ADDR_DHCP;
258 
259 		/*
260 		 * ipmgmt_am_reqhost comes through in `nvl' for purposes of
261 		 * updating the cached representation, but it is persisted as
262 		 * a stand-alone DB line; so remove it after copying it.
263 		 */
264 		if (!nvlist_exists(nvl, IPADM_NVP_REQHOST)) {
265 			*nodep->ipmgmt_am_reqhost = '\0';
266 		} else {
267 			if ((err = nvlist_lookup_string(nvl, IPADM_NVP_REQHOST,
268 			    &reqhost)) != 0)
269 				return (err);
270 
271 			(void) strlcpy(nodep->ipmgmt_am_reqhost, reqhost,
272 			    sizeof (nodep->ipmgmt_am_reqhost));
273 			(void) nvlist_remove(nvl, IPADM_NVP_REQHOST,
274 			    DATA_TYPE_STRING);
275 		}
276 	} else if (nvlist_exists(nvl, IPADM_NVP_IPV6ADDR)) {
277 		af = AF_INET6;
278 		addrtype = IPADM_ADDR_STATIC;
279 	} else if (nvlist_lookup_nvlist(nvl, IPADM_NVP_INTFID, &nvladdr) == 0) {
280 		struct sockaddr_in6		sin6 = {0};
281 		uint8_t	*addr6;
282 		uint32_t plen;
283 		uint_t	n;
284 
285 		af = AF_INET6;
286 		addrtype = IPADM_ADDR_IPV6_ADDRCONF;
287 		if (nvlist_lookup_uint32(nvladdr, IPADM_NVP_PREFIXLEN,
288 		    &plen) != 0)
289 			return (EINVAL);
290 		if (plen != 0) {
291 			if (nvlist_lookup_uint8_array(nvladdr,
292 			    IPADM_NVP_IPNUMADDR, &addr6, &n) != 0)
293 				return (EINVAL);
294 			bcopy(addr6, &sin6.sin6_addr, n);
295 		}
296 
297 		nodep->ipmgmt_am_linklocal = B_TRUE;
298 		nodep->ipmgmt_am_ifid = sin6;
299 	}
300 
301 	/*
302 	 * populate the non-addrtype-specific `*nodep' with retrieved values.
303 	 */
304 	(void) strlcpy(nodep->am_ifname, ifname, sizeof (nodep->am_ifname));
305 	(void) strlcpy(nodep->am_aobjname, aobjname,
306 	    sizeof (nodep->am_aobjname));
307 	nodep->am_lnum = lnum;
308 	nodep->am_family = af;
309 	nodep->am_atype = addrtype;
310 	nodep->am_next = NULL;
311 
312 	/*
313 	 * Do not store logical interface number in persistent store as it
314 	 * takes different value on reboot. So remove it from `nvl'.
315 	 */
316 	if (nvlist_exists(nvl, IPADM_NVP_LIFNUM))
317 		(void) nvlist_remove(nvl, IPADM_NVP_LIFNUM, DATA_TYPE_INT32);
318 
319 	return (0);
320 }
321 
322 /*
323  * Handles the door command IPMGMT_CMD_SETADDR. It adds a new address object
324  * node to the list `aobjmap' and optionally persists the address
325  * information in the DB.
326  */
327 static void
ipmgmt_setaddr_handler(void * argp)328 ipmgmt_setaddr_handler(void *argp)
329 {
330 	ipmgmt_setaddr_arg_t	*sargp = argp;
331 	ipmgmt_retval_t		rval;
332 	ipmgmt_aobjmap_t	node = {0};
333 	nvlist_t		*nvl = NULL;
334 	char			*nvlbuf;
335 	size_t			nvlsize = sargp->ia_nvlsize;
336 	uint32_t		flags = sargp->ia_flags;
337 	int			err = 0;
338 
339 	nvlbuf = (char *)argp + sizeof (ipmgmt_setaddr_arg_t);
340 	if ((err = nvlist_unpack(nvlbuf, nvlsize, &nvl, 0)) != 0)
341 		goto ret;
342 	if (flags & (IPMGMT_ACTIVE|IPMGMT_INIT)) {
343 		if ((err = i_ipmgmt_nvl2aobjnode(nvl, &node)) != 0)
344 			goto ret;
345 		if (flags & IPMGMT_INIT)
346 			node.am_flags = (IPMGMT_ACTIVE|IPMGMT_PERSIST);
347 		else
348 			node.am_flags = flags & ~IPMGMT_PROPS_ONLY;
349 		if ((err = ipmgmt_aobjmap_op(&node, ADDROBJ_ADD)) != 0)
350 			goto ret;
351 	}
352 	if ((flags & IPMGMT_PERSIST) && !(flags & IPMGMT_PROPS_ONLY)) {
353 		ipadm_dbwrite_cbarg_t	cb;
354 
355 		cb.dbw_nvl = nvl;
356 		cb.dbw_flags = 0;
357 		err = ipmgmt_db_walk(ipmgmt_db_add, &cb, IPADM_DB_WRITE);
358 	}
359 ret:
360 	nvlist_free(nvl);
361 	rval.ir_err = err;
362 	(void) door_return((char *)&rval, sizeof (rval), NULL, 0);
363 }
364 
365 /*
366  * Handles the door commands that read or modify the `aobjmap' structure.
367  *
368  * IPMGMT_CMD_ADDROBJ_LOOKUPADD - places a stub address object in `aobjmap'
369  *	after ensuring that the namespace is not taken. If required, also
370  *	generates an `aobjname' for address object for the library to use.
371  * IPMGMT_CMD_ADDROBJ_ADD - add/update address object in `aobjmap'
372  * IPMGMT_CMD_LIF2ADDROBJ - given a logical interface, return address object
373  *	associated with that logical interface.
374  * IPMGMT_CMD_AOBJNAME2ADDROBJ - given an address object name return logical
375  *	interface associated with that address object.
376  */
377 static void
ipmgmt_aobjop_handler(void * argp)378 ipmgmt_aobjop_handler(void *argp)
379 {
380 	ipmgmt_aobjop_arg_t	*largp = argp;
381 	ipmgmt_retval_t		rval;
382 	ipmgmt_aobjop_rval_t	aobjrval;
383 	void			*rvalp;
384 	size_t			rsize;
385 	ipmgmt_aobjmap_t	node;
386 	int			err = 0;
387 	char			*ifname = largp->ia_ifname;
388 	char			*aobjname = largp->ia_aobjname;
389 	int32_t			lnum = largp->ia_lnum;
390 	sa_family_t		af = largp->ia_family;
391 	ipadm_addr_type_t	atype = largp->ia_atype;
392 	ipmgmt_aobjmap_t	*head;
393 
394 	switch (largp->ia_cmd) {
395 	case IPMGMT_CMD_ADDROBJ_LOOKUPADD:
396 		rsize = sizeof (ipmgmt_aobjop_rval_t);
397 		rvalp = &aobjrval;
398 		bzero(&node, sizeof (node));
399 		(void) strlcpy(node.am_aobjname, aobjname,
400 		    sizeof (node.am_aobjname));
401 		(void) strlcpy(node.am_ifname, ifname,
402 		    sizeof (node.am_ifname));
403 		node.am_family = af;
404 		node.am_atype = atype;
405 		if (atype == IPADM_ADDR_IPV6_ADDRCONF) {
406 			node.ipmgmt_am_linklocal = B_TRUE;
407 		}
408 		/* no logical number is associated with this addrobj yet */
409 		node.am_lnum = -1;
410 		/* The address object is not persisted yet. */
411 		node.am_flags = IPMGMT_ACTIVE;
412 		err = ipmgmt_aobjmap_op(&node, ADDROBJ_LOOKUPADD);
413 		if (err == 0) {
414 			(void) strlcpy(aobjrval.ir_aobjname, node.am_aobjname,
415 			    sizeof (aobjrval.ir_aobjname));
416 		}
417 		break;
418 	case IPMGMT_CMD_ADDROBJ_SETLIFNUM:
419 		rsize = sizeof (ipmgmt_retval_t);
420 		rvalp = &rval;
421 		bzero(&node, sizeof (node));
422 		(void) strlcpy(node.am_aobjname, aobjname,
423 		    sizeof (node.am_aobjname));
424 		(void) strlcpy(node.am_ifname, ifname,
425 		    sizeof (node.am_ifname));
426 		node.am_family = af;
427 		node.am_lnum = lnum;
428 		err = ipmgmt_aobjmap_op(&node, ADDROBJ_SETLIFNUM);
429 		break;
430 	case IPMGMT_CMD_ADDROBJ_ADD:
431 		rsize = sizeof (ipmgmt_retval_t);
432 		rvalp = &rval;
433 		if (aobjname[0] == '\0' || ifname[0] == '\0' || lnum == -1 ||
434 		    af == AF_UNSPEC) {
435 			err = EINVAL;
436 			break;
437 		}
438 		bzero(&node, sizeof (node));
439 		(void) strlcpy(node.am_aobjname, aobjname,
440 		    sizeof (node.am_aobjname));
441 		(void) strlcpy(node.am_ifname, ifname,
442 		    sizeof (node.am_ifname));
443 		node.am_atype = atype;
444 		node.am_lnum = lnum;
445 		node.am_family = af;
446 		/* The address object is not persisted. */
447 		node.am_flags = IPMGMT_ACTIVE;
448 		err = ipmgmt_aobjmap_op(&node, ADDROBJ_ADD);
449 		break;
450 	case IPMGMT_CMD_AOBJNAME2ADDROBJ:
451 		rsize = sizeof (ipmgmt_aobjop_rval_t);
452 		rvalp = &aobjrval;
453 		bzero(&aobjrval, sizeof (aobjrval));
454 		if (aobjname[0] == '\0') {
455 			err = EINVAL;
456 			break;
457 		}
458 		(void) pthread_rwlock_rdlock(&aobjmap.aobjmap_rwlock);
459 		head = aobjmap.aobjmap_head;
460 		for (; head; head = head->am_next) {
461 			if (strcmp(head->am_aobjname, aobjname) != 0)
462 				continue;
463 			/*
464 			 * For an auto-configured interface, return
465 			 * the lifnum that has the link-local on it.
466 			 * Other logical interfaces were created for
467 			 * prefixes and dhcpv6 addresses and do not
468 			 * have am_ifid set.
469 			 */
470 			if (head->am_atype != IPADM_ADDR_IPV6_ADDRCONF ||
471 			    head->ipmgmt_am_linklocal) {
472 				break;
473 			}
474 		}
475 		if (head == NULL) {
476 			err = ENOENT;
477 			(void) pthread_rwlock_unlock(&aobjmap.aobjmap_rwlock);
478 			break;
479 		}
480 		(void) strlcpy(aobjrval.ir_ifname, head->am_ifname,
481 		    sizeof (aobjrval.ir_ifname));
482 		aobjrval.ir_lnum = head->am_lnum;
483 		aobjrval.ir_family = head->am_family;
484 		aobjrval.ir_flags = head->am_flags;
485 		aobjrval.ir_atype = head->am_atype;
486 		aobjrval.ir_atype_cache = head->am_atype_cache;
487 		(void) pthread_rwlock_unlock(&aobjmap.aobjmap_rwlock);
488 		break;
489 	case IPMGMT_CMD_LIF2ADDROBJ:
490 		rsize = sizeof (ipmgmt_aobjop_rval_t);
491 		rvalp = &aobjrval;
492 		bzero(&aobjrval, sizeof (aobjrval));
493 		if (ifname[0] == '\0') {
494 			err = EINVAL;
495 			break;
496 		}
497 		(void) pthread_rwlock_rdlock(&aobjmap.aobjmap_rwlock);
498 		head = aobjmap.aobjmap_head;
499 		for (; head; head = head->am_next) {
500 			if (strcmp(head->am_ifname, ifname) == 0 &&
501 			    head->am_lnum == lnum &&
502 			    head->am_family == af) {
503 				break;
504 			}
505 		}
506 		if (head == NULL) {
507 			err = ENOENT;
508 			(void) pthread_rwlock_unlock(&aobjmap.aobjmap_rwlock);
509 			break;
510 		}
511 		(void) strlcpy(aobjrval.ir_aobjname, head->am_aobjname,
512 		    sizeof (aobjrval.ir_aobjname));
513 		aobjrval.ir_atype = head->am_atype;
514 		aobjrval.ir_flags = head->am_flags;
515 		aobjrval.ir_atype_cache = head->am_atype_cache;
516 		(void) pthread_rwlock_unlock(&aobjmap.aobjmap_rwlock);
517 		break;
518 	default:
519 		rsize = sizeof (ipmgmt_retval_t);
520 		rvalp = &rval;
521 		err = EINVAL;
522 	}
523 	((ipmgmt_retval_t *)rvalp)->ir_err = err;
524 	(void) door_return((char *)rvalp, rsize, NULL, 0);
525 }
526 
527 /*
528  * Given an interface name and family, deletes all the address objects
529  * associated with it.
530  */
531 void
i_ipmgmt_delif_aobjs(char * ifname,sa_family_t af,uint32_t flags)532 i_ipmgmt_delif_aobjs(char *ifname, sa_family_t af, uint32_t flags)
533 {
534 	ipmgmt_aobjmap_t	*head, *next, *prev;
535 	ipadm_db_op_t		db_op;
536 
537 	prev = NULL;
538 
539 	(void) pthread_rwlock_wrlock(&aobjmap.aobjmap_rwlock);
540 	head = aobjmap.aobjmap_head;
541 	for (; head; head = next) {
542 		next = head->am_next;
543 		if (strcmp(head->am_ifname, ifname) != 0 ||
544 		    head->am_family != af) {
545 			prev = head;
546 			continue;
547 		}
548 
549 		if (head->am_flags == (IPMGMT_ACTIVE|IPMGMT_PERSIST) &&
550 		    flags == IPMGMT_ACTIVE) {
551 			/*
552 			 * If the addres is present in both active and
553 			 * persistent store, and if we are performing
554 			 * a temporary delete, we update the node to
555 			 * indicate that the address is only present in
556 			 * persistent store and we proceed. Otherwise
557 			 * we always delete the node from aobjmap.
558 			 */
559 			head->am_flags &= ~IPMGMT_ACTIVE;
560 			head->am_lnum = -1;
561 			db_op = IPADM_DB_WRITE;
562 		} else {
563 			db_op = IPADM_DB_DELETE;
564 			if (prev == NULL)
565 				aobjmap.aobjmap_head = next;
566 			else
567 				prev->am_next = next;
568 		}
569 		(void) ipmgmt_persist_aobjmap(head, db_op);
570 		if (db_op == IPADM_DB_DELETE)
571 			free(head);
572 	}
573 	(void) pthread_rwlock_unlock(&aobjmap.aobjmap_rwlock);
574 }
575 
576 /*
577  * Handles the door command IPMGMT_CMD_SETIF. It persists the interface
578  * information in the DB.
579  */
580 static void
ipmgmt_setif_handler(void * argp)581 ipmgmt_setif_handler(void *argp)
582 {
583 	ipmgmt_retval_t		rval;
584 
585 	rval.ir_err = ipmgmt_persist_if(argp);
586 	(void) door_return((char *)&rval, sizeof (rval), NULL, 0);
587 }
588 
589 /*
590  * Handles the door command IPMGMT_CMD_RESETIF. For the given interface,
591  * deletes all the persisted interface configuration. It also deletes, from
592  * `aobjmap', all the address objects configured on the given interface.
593  */
594 static void
ipmgmt_resetif_handler(void * argp)595 ipmgmt_resetif_handler(void *argp)
596 {
597 	ipmgmt_if_arg_t		*rargp = argp;
598 	ipmgmt_retval_t		rval;
599 	ipmgmt_if_cbarg_t	cbarg;
600 	uint32_t		flags = rargp->ia_flags;
601 	int			err = 0;
602 
603 	cbarg.cb_family = rargp->ia_family;
604 	cbarg.cb_ifname = rargp->ia_ifname;
605 
606 	cbarg.cb_ipv4exists = B_TRUE;
607 	cbarg.cb_ipv6exists = B_TRUE;
608 
609 	if (flags & IPMGMT_PERSIST)
610 		err = ipmgmt_db_walk(ipmgmt_db_resetif, &cbarg,
611 		    IPADM_DB_DELETE);
612 
613 	if (flags & IPMGMT_ACTIVE)
614 		i_ipmgmt_delif_aobjs(rargp->ia_ifname, rargp->ia_family,
615 		    flags);
616 
617 	rval.ir_err = err;
618 	(void) door_return((char *)&rval, sizeof (rval), NULL, 0);
619 }
620 
621 /*
622  * Handles the door command IPMGMT_CMD_RESETADDR. For the given addrobj
623  * deletes all the persisted addrobj configuration. It also deletes the
624  * corresponding node, from `aobjmap'.
625  */
626 static void
ipmgmt_resetaddr_handler(void * argp)627 ipmgmt_resetaddr_handler(void *argp)
628 {
629 	ipmgmt_addr_arg_t	*rargp = argp;
630 	ipmgmt_retval_t		rval;
631 	ipmgmt_aobjmap_t	node;
632 	uint32_t		flags = rargp->ia_flags;
633 	int			err = 0;
634 	ipmgmt_resetaddr_cbarg_t cbarg;
635 
636 	cbarg.cb_aobjname = rargp->ia_aobjname;
637 
638 	if (flags & IPMGMT_PERSIST)
639 		err = ipmgmt_db_walk(ipmgmt_db_resetaddr, &cbarg,
640 		    IPADM_DB_DELETE);
641 
642 	if (flags & IPMGMT_ACTIVE) {
643 		bzero(&node, sizeof (node));
644 		(void) strlcpy(node.am_aobjname, rargp->ia_aobjname,
645 		    sizeof (node.am_aobjname));
646 
647 		/*
648 		 * am_lnum is used only for IPv6 autoconf case, since there
649 		 * can be multiple nodes with the same aobjname.
650 		 */
651 		node.am_lnum = rargp->ia_lnum;
652 		node.am_flags = flags;
653 		(void) ipmgmt_aobjmap_op(&node, ADDROBJ_DELETE);
654 	}
655 
656 	rval.ir_err = err;
657 	(void) door_return((char *)&rval, sizeof (rval), NULL, 0);
658 }
659 
660 /*
661  * Handles the door command IPMGMT_CMD_GETADDR. It retrieves the persisted
662  * address for a given `gargp->ia_aobjname'. If it is not defined then it
663  * retrieves all the addresses configured on `gargp->ia_ifname'. The
664  * "ipadm show-addr addrobj" or "ipadm show-addr <ifname>/\*" will call this
665  * handler through library.
666  */
667 static void
ipmgmt_getaddr_handler(void * argp)668 ipmgmt_getaddr_handler(void *argp)
669 {
670 	ipmgmt_getaddr_arg_t    *gargp = argp;
671 
672 	ipmgmt_common_handler(gargp->ia_ifname, gargp->ia_aobjname,
673 	    ipmgmt_db_getaddr);
674 }
675 
676 /*
677  * Handles the door command IPMGMT_CMD_RESETPROP. It deletes the property line
678  * from the DB.
679  */
680 static void
ipmgmt_resetprop_handler(void * argp)681 ipmgmt_resetprop_handler(void *argp)
682 {
683 	ipmgmt_prop_arg_t	*pargp = argp;
684 	ipmgmt_retval_t		rval;
685 
686 	assert(pargp->ia_cmd == IPMGMT_CMD_RESETPROP);
687 
688 	rval.ir_err = ipmgmt_db_walk(ipmgmt_db_resetprop, pargp,
689 	    IPADM_DB_DELETE);
690 	(void) door_return((char *)&rval, sizeof (rval), NULL, 0);
691 }
692 
693 /*
694  * Handles the door command IPMGMT_CMD_GETIF. It retrieves the names of all
695  * persisted interfaces and the IP protocol families (IPv4 or IPv6) they
696  * support. Returns the info as a nvlist using door_return() from
697  * ipmgmt_common_handler().
698  */
699 static void
ipmgmt_getif_handler(void * argp)700 ipmgmt_getif_handler(void *argp)
701 {
702 	ipmgmt_getif_arg_t  *getif = argp;
703 
704 	assert(getif->ia_cmd == IPMGMT_CMD_GETIF);
705 
706 	ipmgmt_common_handler(getif->ia_ifname, NULL,
707 	    ipmgmt_db_getif);
708 }
709 
710 /*
711  * Handles the door command IPMGMT_CMD_INITIF. It retrieves all the persisted
712  * interface configuration (interface properties and addresses), for all those
713  * interfaces that need to be initialized.
714  */
715 static void
ipmgmt_initif_handler(void * argp)716 ipmgmt_initif_handler(void *argp)
717 {
718 	ipmgmt_initif_arg_t	*initif = argp;
719 	size_t			buflen, nvlsize;
720 	char			*buf = NULL, *onvlbuf, *invlbuf;
721 	ipmgmt_get_rval_t	rval, *rvalp = &rval;
722 	ipmgmt_initif_cbarg_t	cbarg;
723 	int			err;
724 
725 	assert(initif->ia_cmd == IPMGMT_CMD_INITIF);
726 
727 	bzero(&cbarg, sizeof (cbarg));
728 	invlbuf = (char *)argp + sizeof (ipmgmt_initif_arg_t);
729 	nvlsize = initif->ia_nvlsize;
730 	err = nvlist_unpack(invlbuf, nvlsize, &cbarg.cb_invl, 0);
731 	if (err != 0)
732 		goto fail;
733 
734 	cbarg.cb_family = initif->ia_family;
735 	if (nvlist_alloc(&cbarg.cb_onvl, NV_UNIQUE_NAME, 0) != 0)
736 		goto fail;
737 
738 	err = ipmgmt_db_walk(ipmgmt_db_initif, &cbarg, IPADM_DB_READ);
739 	if (err == ENOENT && cbarg.cb_ocnt > 0) {
740 		/*
741 		 * If there is at least one entry in the nvlist,
742 		 * do not return error.
743 		 */
744 		err = 0;
745 	}
746 	if (err != 0)
747 		goto fail;
748 
749 	if ((err = nvlist_size(cbarg.cb_onvl, &nvlsize, NV_ENCODE_NATIVE)) != 0)
750 		goto fail;
751 
752 	if (nvlsize > (UINT32_MAX - sizeof (ipmgmt_get_rval_t)))
753 		goto fail;
754 
755 	buflen = nvlsize + sizeof (ipmgmt_get_rval_t);
756 	/*
757 	 * We cannot use malloc() here because door_return never returns, and
758 	 * memory allocated by malloc() would get leaked. Use alloca() instead.
759 	 */
760 	buf = alloca(buflen);
761 	onvlbuf = buf + sizeof (ipmgmt_get_rval_t);
762 	if ((err = nvlist_pack(cbarg.cb_onvl, &onvlbuf, &nvlsize,
763 	    NV_ENCODE_NATIVE, 0)) != 0) {
764 		goto fail;
765 	}
766 	nvlist_free(cbarg.cb_invl);
767 	nvlist_free(cbarg.cb_onvl);
768 	rvalp = (ipmgmt_get_rval_t *)(void *)buf;
769 	rvalp->ir_err = 0;
770 	rvalp->ir_nvlsize = nvlsize;
771 
772 	(void) door_return(buf, buflen, NULL, 0);
773 	return;
774 fail:
775 	nvlist_free(cbarg.cb_invl);
776 	nvlist_free(cbarg.cb_onvl);
777 	rvalp->ir_err = err;
778 	(void) door_return((char *)rvalp, sizeof (*rvalp), NULL, 0);
779 }
780 
781 int
ipmgmt_persist_if(ipmgmt_if_arg_t * sargp)782 ipmgmt_persist_if(ipmgmt_if_arg_t *sargp)
783 {
784 	ipadm_dbwrite_cbarg_t	cb;
785 	uint32_t	flags = sargp->ia_flags;
786 	nvlist_t	*nvl = NULL;
787 	char	strval[IPMGMT_STRSIZE];
788 	int	err = 0;
789 
790 	if (!(flags & IPMGMT_PERSIST) || sargp->ia_family == AF_UNSPEC ||
791 	    sargp->ia_ifname[0] == '\0') {
792 		err = EINVAL;
793 		goto ret;
794 	}
795 	if ((err = nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0)) != 0)
796 		goto ret;
797 
798 	if ((err = nvlist_add_string(nvl, IPADM_NVP_IFNAME,
799 	    sargp->ia_ifname)) != 0)
800 		goto ret;
801 
802 	if ((err = ipmgmt_update_family_nvp(nvl, sargp->ia_family,
803 	    IPMGMT_APPEND)) != 0)
804 		goto ret;
805 
806 	(void) snprintf(strval, IPMGMT_STRSIZE, "%d", sargp->ia_ifclass);
807 	if ((err = nvlist_add_string(nvl, IPADM_NVP_IFCLASS, strval)) != 0)
808 		goto ret;
809 
810 	cb.dbw_nvl = nvl;
811 	cb.dbw_flags = IPMGMT_APPEND | IPMGMT_UPDATE_IF;
812 	err = ipmgmt_db_walk(ipmgmt_db_update_if, &cb, IPADM_DB_WRITE);
813 ret:
814 	nvlist_free(nvl);
815 	return (err);
816 }
817 
818 /*
819  * The helper for ipmgmt_getif_handler and ipmgmt_getaddr_handler
820  */
821 static void
ipmgmt_common_handler(char * if_name,char * aobj_name,db_wfunc_t worker)822 ipmgmt_common_handler(char *if_name, char *aobj_name, db_wfunc_t worker)
823 {
824 	size_t			buflen, onvlsize;
825 	char			*buf, *onvlbuf;
826 	ipmgmt_get_cbarg_t	cbarg;
827 	ipmgmt_get_rval_t	rval, *rvalp = &rval;
828 	int			err = 0;
829 
830 	cbarg.cb_ifname = if_name;
831 	cbarg.cb_aobjname = aobj_name;
832 	cbarg.cb_ocnt = 0;
833 
834 	if (nvlist_alloc(&cbarg.cb_onvl, NV_UNIQUE_NAME, 0) != 0)
835 		goto fail;
836 
837 	err = ipmgmt_db_walk(worker, &cbarg, IPADM_DB_READ);
838 	if (err == ENOENT && cbarg.cb_ocnt > 0) {
839 		/*
840 		 * If there is at least one entry in the nvlist,
841 		 * do not return error.
842 		 */
843 		err = 0;
844 	}
845 	if (err != 0)
846 		goto fail;
847 
848 	if ((err = nvlist_size(cbarg.cb_onvl, &onvlsize,
849 	    NV_ENCODE_NATIVE)) != 0)
850 		goto fail;
851 
852 	if (onvlsize > (UINT32_MAX - sizeof (ipmgmt_get_rval_t)))
853 		goto fail;
854 
855 	buflen = onvlsize + sizeof (ipmgmt_get_rval_t);
856 	/*
857 	 * We cannot use malloc() here because door_return never returns, and
858 	 * memory allocated by malloc() would get leaked. Use alloca() instead.
859 	 */
860 	buf = alloca(buflen);
861 	onvlbuf = buf + sizeof (ipmgmt_get_rval_t);
862 	if ((err = nvlist_pack(cbarg.cb_onvl, &onvlbuf,
863 	    &onvlsize, NV_ENCODE_NATIVE, 0)) != 0)
864 		goto fail;
865 
866 	nvlist_free(cbarg.cb_onvl);
867 	rvalp = (ipmgmt_get_rval_t *)(void *)buf;
868 	rvalp->ir_err = 0;
869 	rvalp->ir_nvlsize = onvlsize;
870 
871 	(void) door_return(buf, buflen, NULL, 0);
872 
873 fail:
874 	nvlist_free(cbarg.cb_onvl);
875 	rvalp->ir_err = err;
876 	(void) door_return((char *)rvalp, sizeof (*rvalp), NULL, 0);
877 }
878 
879 /*
880  * Handles the door command IPMGMT_CMD_IPMP_UPDATE
881  */
882 static void
ipmgmt_ipmp_update_handler(void * argp)883 ipmgmt_ipmp_update_handler(void *argp)
884 {
885 	ipmgmt_ipmp_update_arg_t *uargp = argp;
886 	ipmgmt_retval_t	rval;
887 	ipadm_dbwrite_cbarg_t	cb;
888 
889 	boolean_t	gif_exists;
890 	char		gifname[LIFNAMSIZ];
891 	nvlist_t	*nvl = NULL;
892 	uint32_t	flags = uargp->ia_flags;
893 	int		err = 0;
894 
895 	assert(uargp->ia_cmd == IPMGMT_CMD_IPMP_UPDATE);
896 
897 	gif_exists = ipmgmt_persist_if_exists(uargp->ia_gifname,
898 	    AF_UNSPEC);
899 
900 	if (!ipmgmt_persist_if_exists(uargp->ia_mifname, AF_UNSPEC)) {
901 		err = EINVAL;
902 		goto ret;
903 	}
904 
905 	ipmgmt_get_group_interface(uargp->ia_mifname, gifname, LIFNAMSIZ);
906 
907 	if (flags & IPMGMT_APPEND) {
908 		/* Group interface should be available in the DB */
909 		if (!gif_exists) {
910 			err = ENOENT;
911 			goto ret;
912 		}
913 
914 		if (gifname[0] != '\0') {
915 			err = EEXIST;
916 			goto ret;
917 		}
918 	}
919 
920 	if (flags & IPMGMT_REMOVE) {
921 		/* We cannot remove something that does not exist */
922 		if (!gif_exists || gifname[0] == '\0') {
923 			err = ENOENT;
924 			goto ret;
925 		}
926 		if (strcmp(uargp->ia_gifname, gifname) != 0) {
927 			err = EINVAL;
928 			goto ret;
929 		}
930 	}
931 
932 	if (flags & IPMGMT_PERSIST) {
933 		if ((err = nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0)) != 0)
934 			goto ret;
935 
936 		if ((err = nvlist_add_string(nvl, IPADM_NVP_IFNAME,
937 		    uargp->ia_gifname)) != 0)
938 			goto ret;
939 
940 		if ((err = nvlist_add_string(nvl, IPADM_NVP_MIFNAMES,
941 		    uargp->ia_mifname)) != 0)
942 			goto ret;
943 
944 		if ((err = nvlist_add_string(nvl, IPADM_NVP_GIFNAME,
945 		    uargp->ia_gifname)) != 0)
946 			goto ret;
947 
948 		cb.dbw_nvl = nvl;
949 		cb.dbw_flags = flags | IPMGMT_UPDATE_IF | IPMGMT_UPDATE_IPMP;
950 		err = ipmgmt_db_walk(ipmgmt_db_update_if, &cb, IPADM_DB_WRITE);
951 	}
952 ret:
953 	nvlist_free(nvl);
954 	rval.ir_err = err;
955 	(void) door_return((char *)&rval, sizeof (rval), NULL, 0);
956 }
957