[thirdparty/systemd.git] / src / nss-mymachines / nss-mymachines.c

/* SPDX-License-Identifier: LGPL-2.1+ */

#include <netdb.h>
#include <nss.h>

#include "sd-bus.h"
#include "sd-login.h"

#include "alloc-util.h"
#include "bus-common-errors.h"
#include "bus-locator.h"
#include "env-util.h"
#include "errno-util.h"
#include "format-util.h"
#include "hostname-util.h"
#include "in-addr-util.h"
#include "macro.h"
#include "memory-util.h"
#include "nss-util.h"
#include "signal-util.h"
#include "string-util.h"

NSS_GETHOSTBYNAME_PROTOTYPES(mymachines);
NSS_GETPW_PROTOTYPES(mymachines);
NSS_GETGR_PROTOTYPES(mymachines);

static int count_addresses(sd_bus_message *m, int af, unsigned *ret) {
        unsigned c = 0;
        int r;

        assert(m);
        assert(ret);

        while ((r = sd_bus_message_enter_container(m, 'r', "iay")) > 0) {
                int family;

                r = sd_bus_message_read(m, "i", &family);
                if (r < 0)
                        return r;

                r = sd_bus_message_skip(m, "ay");
                if (r < 0)
                        return r;

                r = sd_bus_message_exit_container(m);
                if (r < 0)
                        return r;

                if (af != AF_UNSPEC && family != af)
                        continue;

                c++;
        }
        if (r < 0)
                return r;

        r = sd_bus_message_rewind(m, false);
        if (r < 0)
                return r;

        *ret = c;
        return 0;
}

static bool avoid_deadlock(void) {

        /* Check whether this lookup might have a chance of deadlocking because we are called from the service manager
         * code activating systemd-machined.service. After all, we shouldn't synchronously do lookups to
         * systemd-machined if we are required to finish before it can be started. This of course won't detect all
         * possible dead locks of this kind, but it should work for the most obvious cases. */

        if (geteuid() != 0) /* Ignore the env vars unless we are privileged. */
                return false;

        return streq_ptr(getenv("SYSTEMD_ACTIVATION_UNIT"), "systemd-machined.service") &&
               streq_ptr(getenv("SYSTEMD_ACTIVATION_SCOPE"), "system");
}

enum nss_status _nss_mymachines_gethostbyname4_r(
                const char *name,
                struct gaih_addrtuple **pat,
                char *buffer, size_t buflen,
                int *errnop, int *h_errnop,
                int32_t *ttlp) {

        struct gaih_addrtuple *r_tuple, *r_tuple_first = NULL;
        _cleanup_(sd_bus_message_unrefp) sd_bus_message* reply = NULL;
        _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
        _cleanup_free_ int *ifindices = NULL;
        _cleanup_free_ char *class = NULL;
        size_t l, ms, idx;
        unsigned i = 0, c = 0;
        char *r_name;
        int n_ifindices, r;

        PROTECT_ERRNO;
        BLOCK_SIGNALS(NSS_SIGNALS_BLOCK);

        assert(name);
        assert(pat);
        assert(buffer);
        assert(errnop);
        assert(h_errnop);

        r = sd_machine_get_class(name, &class);
        if (r < 0)
                goto fail;
        if (!streq(class, "container")) {
                r = -ENOTTY;
                goto fail;
        }

        n_ifindices = sd_machine_get_ifindices(name, &ifindices);
        if (n_ifindices < 0) {
                r = n_ifindices;
                goto fail;
        }

        if (avoid_deadlock()) {
                r = -EDEADLK;
                goto fail;
        }

        r = sd_bus_open_system(&bus);
        if (r < 0)
                goto fail;

        r = bus_call_method(bus, bus_machine_mgr, "GetMachineAddresses", NULL, &reply, "s", name);
        if (r < 0)
                goto fail;

        r = sd_bus_message_enter_container(reply, 'a', "(iay)");
        if (r < 0)
                goto fail;

        r = count_addresses(reply, AF_UNSPEC, &c);
        if (r < 0)
                goto fail;

        if (c <= 0) {
                *h_errnop = HOST_NOT_FOUND;
                return NSS_STATUS_NOTFOUND;
        }

        l = strlen(name);
        ms = ALIGN(l+1) + ALIGN(sizeof(struct gaih_addrtuple)) * c;
        if (buflen < ms) {
                UNPROTECT_ERRNO;
                *errnop = ERANGE;
                *h_errnop = NETDB_INTERNAL;
                return NSS_STATUS_TRYAGAIN;
        }

        /* First, append name */
        r_name = buffer;
        memcpy(r_name, name, l+1);
        idx = ALIGN(l+1);

        /* Second, append addresses */
        r_tuple_first = (struct gaih_addrtuple*) (buffer + idx);
        while ((r = sd_bus_message_enter_container(reply, 'r', "iay")) > 0) {
                int family;
                const void *a;
                size_t sz;

                r = sd_bus_message_read(reply, "i", &family);
                if (r < 0)
                        goto fail;

                r = sd_bus_message_read_array(reply, 'y', &a, &sz);
                if (r < 0)
                        goto fail;

                r = sd_bus_message_exit_container(reply);
                if (r < 0)
                        goto fail;

                if (!IN_SET(family, AF_INET, AF_INET6)) {
                        r = -EAFNOSUPPORT;
                        goto fail;
                }

                if (sz != FAMILY_ADDRESS_SIZE(family)) {
                        r = -EINVAL;
                        goto fail;
                }

                r_tuple = (struct gaih_addrtuple*) (buffer + idx);
                r_tuple->next = i == c-1 ? NULL : (struct gaih_addrtuple*) ((char*) r_tuple + ALIGN(sizeof(struct gaih_addrtuple)));
                r_tuple->name = r_name;
                r_tuple->family = family;
                r_tuple->scopeid = n_ifindices == 1 ? ifindices[0] : 0;
                memcpy(r_tuple->addr, a, sz);

                idx += ALIGN(sizeof(struct gaih_addrtuple));
                i++;
        }

        assert(i == c);

        r = sd_bus_message_exit_container(reply);
        if (r < 0)
                goto fail;

        assert(idx == ms);

        if (*pat)
                **pat = *r_tuple_first;
        else
                *pat = r_tuple_first;

        if (ttlp)
                *ttlp = 0;

        /* Explicitly reset both *h_errnop and h_errno to work around
         * https://bugzilla.redhat.com/show_bug.cgi?id=1125975 */
        *h_errnop = NETDB_SUCCESS;
        h_errno = 0;

        return NSS_STATUS_SUCCESS;

fail:
        UNPROTECT_ERRNO;
        *errnop = -r;
        *h_errnop = NO_RECOVERY;
        return NSS_STATUS_UNAVAIL;
}

enum nss_status _nss_mymachines_gethostbyname3_r(
                const char *name,
                int af,
                struct hostent *result,
                char *buffer, size_t buflen,
                int *errnop, int *h_errnop,
                int32_t *ttlp,
                char **canonp) {

        _cleanup_(sd_bus_message_unrefp) sd_bus_message* reply = NULL;
        _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
        _cleanup_free_ char *class = NULL;
        unsigned c = 0, i = 0;
        char *r_name, *r_aliases, *r_addr, *r_addr_list;
        size_t l, idx, ms, alen;
        int r;

        PROTECT_ERRNO;
        BLOCK_SIGNALS(NSS_SIGNALS_BLOCK);

        assert(name);
        assert(result);
        assert(buffer);
        assert(errnop);
        assert(h_errnop);

        if (af == AF_UNSPEC)
                af = AF_INET;

        if (af != AF_INET && af != AF_INET6) {
                r = -EAFNOSUPPORT;
                goto fail;
        }

        r = sd_machine_get_class(name, &class);
        if (r < 0)
                goto fail;
        if (!streq(class, "container")) {
                r = -ENOTTY;
                goto fail;
        }

        if (avoid_deadlock()) {
                r = -EDEADLK;
                goto fail;
        }

        r = sd_bus_open_system(&bus);
        if (r < 0)
                goto fail;

        r = bus_call_method(bus, bus_machine_mgr, "GetMachineAddresses", NULL, &reply, "s", name);
        if (r < 0)
                goto fail;

        r = sd_bus_message_enter_container(reply, 'a', "(iay)");
        if (r < 0)
                goto fail;

        r = count_addresses(reply, af, &c);
        if (r < 0)
                goto fail;

        if (c <= 0) {
                *h_errnop = HOST_NOT_FOUND;
                return NSS_STATUS_NOTFOUND;
        }

        alen = FAMILY_ADDRESS_SIZE(af);
        l = strlen(name);

        ms = ALIGN(l+1) + c * ALIGN(alen) + (c+2) * sizeof(char*);

        if (buflen < ms) {
                UNPROTECT_ERRNO;
                *errnop = ERANGE;
                *h_errnop = NETDB_INTERNAL;
                return NSS_STATUS_TRYAGAIN;
        }

        /* First, append name */
        r_name = buffer;
        memcpy(r_name, name, l+1);
        idx = ALIGN(l+1);

        /* Second, create aliases array */
        r_aliases = buffer + idx;
        ((char**) r_aliases)[0] = NULL;
        idx += sizeof(char*);

        /* Third, append addresses */
        r_addr = buffer + idx;
        while ((r = sd_bus_message_enter_container(reply, 'r', "iay")) > 0) {
                int family;
                const void *a;
                size_t sz;

                r = sd_bus_message_read(reply, "i", &family);
                if (r < 0)
                        goto fail;

                r = sd_bus_message_read_array(reply, 'y', &a, &sz);
                if (r < 0)
                        goto fail;

                r = sd_bus_message_exit_container(reply);
                if (r < 0)
                        goto fail;

                if (family != af)
                        continue;

                if (sz != alen) {
                        r = -EINVAL;
                        goto fail;
                }

                memcpy(r_addr + i*ALIGN(alen), a, alen);
                i++;
        }

        assert(i == c);
        idx += c * ALIGN(alen);

        r = sd_bus_message_exit_container(reply);
        if (r < 0)
                goto fail;

        /* Third, append address pointer array */
        r_addr_list = buffer + idx;
        for (i = 0; i < c; i++)
                ((char**) r_addr_list)[i] = r_addr + i*ALIGN(alen);

        ((char**) r_addr_list)[i] = NULL;
        idx += (c+1) * sizeof(char*);

        assert(idx == ms);

        result->h_name = r_name;
        result->h_aliases = (char**) r_aliases;
        result->h_addrtype = af;
        result->h_length = alen;
        result->h_addr_list = (char**) r_addr_list;

        if (ttlp)
                *ttlp = 0;

        if (canonp)
                *canonp = r_name;

        /* Explicitly reset both *h_errnop and h_errno to work around
         * https://bugzilla.redhat.com/show_bug.cgi?id=1125975 */
        *h_errnop = NETDB_SUCCESS;
        h_errno = 0;

        return NSS_STATUS_SUCCESS;

fail:
        UNPROTECT_ERRNO;
        *errnop = -r;
        *h_errnop = NO_RECOVERY;
        return NSS_STATUS_UNAVAIL;
}

NSS_GETHOSTBYNAME_FALLBACKS(mymachines);

enum nss_status _nss_mymachines_getpwnam_r(
                const char *name,
                struct passwd *pwd,
                char *buffer, size_t buflen,
                int *errnop) {

        return NSS_STATUS_NOTFOUND;
}

enum nss_status _nss_mymachines_getpwuid_r(
                uid_t uid,
                struct passwd *pwd,
                char *buffer, size_t buflen,
                int *errnop) {

        return NSS_STATUS_NOTFOUND;
}

enum nss_status _nss_mymachines_getgrnam_r(
                const char *name,
                struct group *gr,
                char *buffer, size_t buflen,
                int *errnop) {

        return NSS_STATUS_NOTFOUND;
}

enum nss_status _nss_mymachines_getgrgid_r(
                gid_t gid,
                struct group *gr,
                char *buffer, size_t buflen,
                int *errnop) {

        return NSS_STATUS_NOTFOUND;
}
Commit	Line	Data
53e1b683	1	/* SPDX-License-Identifier: LGPL-2.1+ */
cabb0bc6	2
cabb0bc6	3	#include <netdb.h>
07630cea	4	#include <nss.h>
cabb0bc6 LP	5
	6	#include "sd-bus.h"
	7	#include "sd-login.h"
07630cea	8
b5efdb8a	9	#include "alloc-util.h"
c01ff965	10	#include "bus-common-errors.h"
9b71e4ab	11	#include "bus-locator.h"
6e32c03e	12	#include "env-util.h"
2b2fec7d	13	#include "errno-util.h"
ca78ad1d	14	#include "format-util.h"
25300b5a	15	#include "hostname-util.h"
07630cea LP	16	#include "in-addr-util.h"
07630cea LP	17	#include "macro.h"
0a970718	18	#include "memory-util.h"
07630cea	19	#include "nss-util.h"
0c5eb056	20	#include "signal-util.h"
07630cea	21	#include "string-util.h"
cabb0bc6 LP	22
cabb0bc6 LP	23	NSS_GETHOSTBYNAME_PROTOTYPES(mymachines);
c01ff965 LP	24	NSS_GETPW_PROTOTYPES(mymachines);
c01ff965 LP	25	NSS_GETGR_PROTOTYPES(mymachines);
cabb0bc6	26
0dd25fb9	27	static int count_addresses(sd_bus_message m, int af, unsigned ret) {
cabb0bc6 LP	28	unsigned c = 0;
	29	int r;
	30
	31	assert(m);
	32	assert(ret);
	33
3a6fb33c	34	while ((r = sd_bus_message_enter_container(m, 'r', "iay")) > 0) {
0dd25fb9	35	int family;
cabb0bc6	36
0dd25fb9	37	r = sd_bus_message_read(m, "i", &family);
cabb0bc6 LP	38	if (r < 0)
	39	return r;
	40
	41	r = sd_bus_message_skip(m, "ay");
	42	if (r < 0)
	43	return r;
	44
	45	r = sd_bus_message_exit_container(m);
	46	if (r < 0)
	47	return r;
	48
	49	if (af != AF_UNSPEC && family != af)
	50	continue;
	51
313cefa1	52	c++;
cabb0bc6 LP	53	}
	54	if (r < 0)
	55	return r;
	56
	57	r = sd_bus_message_rewind(m, false);
	58	if (r < 0)
	59	return r;
	60
	61	*ret = c;
	62	return 0;
	63	}
	64
2f28018c LP	65	static bool avoid_deadlock(void) {
	66
	67	/* Check whether this lookup might have a chance of deadlocking because we are called from the service manager
	68	* code activating systemd-machined.service. After all, we shouldn't synchronously do lookups to
	69	* systemd-machined if we are required to finish before it can be started. This of course won't detect all
	70	* possible dead locks of this kind, but it should work for the most obvious cases. */
	71
	72	if (geteuid() != 0) /* Ignore the env vars unless we are privileged. */
	73	return false;
	74
	75	return streq_ptr(getenv("SYSTEMD_ACTIVATION_UNIT"), "systemd-machined.service") &&
	76	streq_ptr(getenv("SYSTEMD_ACTIVATION_SCOPE"), "system");
	77	}
	78
cabb0bc6 LP	79	enum nss_status _nss_mymachines_gethostbyname4_r(
	80	const char *name,
	81	struct gaih_addrtuple **pat,
	82	char *buffer, size_t buflen,
	83	int errnop, int h_errnop,
	84	int32_t *ttlp) {
	85
	86	struct gaih_addrtuple r_tuple, r_tuple_first = NULL;
4afd3348 LP	87	_cleanup_(sd_bus_message_unrefp) sd_bus_message* reply = NULL;
4afd3348 LP	88	_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
634af566	89	_cleanup_free_ int *ifindices = NULL;
cabb0bc6 LP	90	_cleanup_free_ char *class = NULL;
	91	size_t l, ms, idx;
	92	unsigned i = 0, c = 0;
	93	char *r_name;
634af566	94	int n_ifindices, r;
cabb0bc6	95
06202b9e	96	PROTECT_ERRNO;
0c5eb056 LP	97	BLOCK_SIGNALS(NSS_SIGNALS_BLOCK);
0c5eb056 LP	98
cabb0bc6 LP	99	assert(name);
	100	assert(pat);
	101	assert(buffer);
	102	assert(errnop);
	103	assert(h_errnop);
	104
	105	r = sd_machine_get_class(name, &class);
	106	if (r < 0)
	107	goto fail;
	108	if (!streq(class, "container")) {
	109	r = -ENOTTY;
	110	goto fail;
	111	}
	112
634af566 LP	113	n_ifindices = sd_machine_get_ifindices(name, &ifindices);
	114	if (n_ifindices < 0) {
	115	r = n_ifindices;
cabb0bc6 LP	116	goto fail;
	117	}
	118
2f28018c LP	119	if (avoid_deadlock()) {
	120	r = -EDEADLK;
	121	goto fail;
	122	}
	123
cabb0bc6 LP	124	r = sd_bus_open_system(&bus);
	125	if (r < 0)
	126	goto fail;
	127
7b389878	128	r = bus_call_method(bus, bus_machine_mgr, "GetMachineAddresses", NULL, &reply, "s", name);
cabb0bc6 LP	129	if (r < 0)
	130	goto fail;
	131
0dd25fb9	132	r = sd_bus_message_enter_container(reply, 'a', "(iay)");
cabb0bc6 LP	133	if (r < 0)
	134	goto fail;
	135
	136	r = count_addresses(reply, AF_UNSPEC, &c);
	137	if (r < 0)
	138	goto fail;
	139
	140	if (c <= 0) {
cabb0bc6 LP	141	*h_errnop = HOST_NOT_FOUND;
	142	return NSS_STATUS_NOTFOUND;
	143	}
	144
	145	l = strlen(name);
	146	ms = ALIGN(l+1) + ALIGN(sizeof(struct gaih_addrtuple)) * c;
	147	if (buflen < ms) {
cdccd29f	148	UNPROTECT_ERRNO;
0192cbdb	149	*errnop = ERANGE;
cda458a5	150	*h_errnop = NETDB_INTERNAL;
cabb0bc6 LP	151	return NSS_STATUS_TRYAGAIN;
	152	}
	153
	154	/* First, append name */
	155	r_name = buffer;
	156	memcpy(r_name, name, l+1);
	157	idx = ALIGN(l+1);
	158
	159	/* Second, append addresses */
	160	r_tuple_first = (struct gaih_addrtuple*) (buffer + idx);
0dd25fb9 LP	161	while ((r = sd_bus_message_enter_container(reply, 'r', "iay")) > 0) {
0dd25fb9 LP	162	int family;
cabb0bc6 LP	163	const void *a;
	164	size_t sz;
	165
0dd25fb9	166	r = sd_bus_message_read(reply, "i", &family);
cabb0bc6 LP	167	if (r < 0)
	168	goto fail;
	169
	170	r = sd_bus_message_read_array(reply, 'y', &a, &sz);
	171	if (r < 0)
	172	goto fail;
	173
	174	r = sd_bus_message_exit_container(reply);
	175	if (r < 0)
	176	goto fail;
	177
555bd6e9 LP	178	if (!IN_SET(family, AF_INET, AF_INET6)) {
	179	r = -EAFNOSUPPORT;
	180	goto fail;
	181	}
	182
9d485985	183	if (sz != FAMILY_ADDRESS_SIZE(family)) {
cabb0bc6 LP	184	r = -EINVAL;
	185	goto fail;
	186	}
	187
	188	r_tuple = (struct gaih_addrtuple*) (buffer + idx);
	189	r_tuple->next = i == c-1 ? NULL : (struct gaih_addrtuple) ((char) r_tuple + ALIGN(sizeof(struct gaih_addrtuple)));
	190	r_tuple->name = r_name;
	191	r_tuple->family = family;
634af566	192	r_tuple->scopeid = n_ifindices == 1 ? ifindices[0] : 0;
cabb0bc6 LP	193	memcpy(r_tuple->addr, a, sz);
	194
	195	idx += ALIGN(sizeof(struct gaih_addrtuple));
	196	i++;
	197	}
	198
	199	assert(i == c);
	200
	201	r = sd_bus_message_exit_container(reply);
	202	if (r < 0)
	203	goto fail;
	204
	205	assert(idx == ms);
	206
	207	if (*pat)
	208	*pat = r_tuple_first;
	209	else
	210	*pat = r_tuple_first;
	211
	212	if (ttlp)
	213	*ttlp = 0;
	214
06202b9e YW	215	/* Explicitly reset both *h_errnop and h_errno to work around
06202b9e YW	216	* https://bugzilla.redhat.com/show_bug.cgi?id=1125975 */
e70df46b LP	217	*h_errnop = NETDB_SUCCESS;
	218	h_errno = 0;
	219
cabb0bc6 LP	220	return NSS_STATUS_SUCCESS;
	221
	222	fail:
cdccd29f	223	UNPROTECT_ERRNO;
0192cbdb	224	*errnop = -r;
2b0c1bfd	225	*h_errnop = NO_RECOVERY;
cabb0bc6 LP	226	return NSS_STATUS_UNAVAIL;
	227	}
	228
	229	enum nss_status _nss_mymachines_gethostbyname3_r(
	230	const char *name,
	231	int af,
	232	struct hostent *result,
	233	char *buffer, size_t buflen,
	234	int errnop, int h_errnop,
	235	int32_t *ttlp,
	236	char **canonp) {
	237
4afd3348 LP	238	_cleanup_(sd_bus_message_unrefp) sd_bus_message* reply = NULL;
4afd3348 LP	239	_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
cabb0bc6 LP	240	_cleanup_free_ char *class = NULL;
	241	unsigned c = 0, i = 0;
	242	char r_name, r_aliases, r_addr, r_addr_list;
	243	size_t l, idx, ms, alen;
	244	int r;
	245
06202b9e	246	PROTECT_ERRNO;
0c5eb056 LP	247	BLOCK_SIGNALS(NSS_SIGNALS_BLOCK);
0c5eb056 LP	248
cabb0bc6 LP	249	assert(name);
	250	assert(result);
	251	assert(buffer);
	252	assert(errnop);
	253	assert(h_errnop);
	254
	255	if (af == AF_UNSPEC)
	256	af = AF_INET;
	257
	258	if (af != AF_INET && af != AF_INET6) {
	259	r = -EAFNOSUPPORT;
	260	goto fail;
	261	}
	262
	263	r = sd_machine_get_class(name, &class);
	264	if (r < 0)
	265	goto fail;
	266	if (!streq(class, "container")) {
	267	r = -ENOTTY;
	268	goto fail;
	269	}
	270
2f28018c LP	271	if (avoid_deadlock()) {
	272	r = -EDEADLK;
	273	goto fail;
	274	}
	275
cabb0bc6 LP	276	r = sd_bus_open_system(&bus);
	277	if (r < 0)
	278	goto fail;
	279
7b389878	280	r = bus_call_method(bus, bus_machine_mgr, "GetMachineAddresses", NULL, &reply, "s", name);
cabb0bc6 LP	281	if (r < 0)
	282	goto fail;
	283
0dd25fb9	284	r = sd_bus_message_enter_container(reply, 'a', "(iay)");
cabb0bc6 LP	285	if (r < 0)
	286	goto fail;
	287
	288	r = count_addresses(reply, af, &c);
	289	if (r < 0)
	290	goto fail;
	291
	292	if (c <= 0) {
cabb0bc6 LP	293	*h_errnop = HOST_NOT_FOUND;
	294	return NSS_STATUS_NOTFOUND;
	295	}
	296
9d485985	297	alen = FAMILY_ADDRESS_SIZE(af);
cabb0bc6 LP	298	l = strlen(name);
cabb0bc6 LP	299
66a16e7e	300	ms = ALIGN(l+1) + c * ALIGN(alen) + (c+2) * sizeof(char*);
cabb0bc6 LP	301
cabb0bc6 LP	302	if (buflen < ms) {
cdccd29f	303	UNPROTECT_ERRNO;
0192cbdb	304	*errnop = ERANGE;
cda458a5	305	*h_errnop = NETDB_INTERNAL;
cabb0bc6 LP	306	return NSS_STATUS_TRYAGAIN;
	307	}
	308
	309	/* First, append name */
	310	r_name = buffer;
	311	memcpy(r_name, name, l+1);
	312	idx = ALIGN(l+1);
	313
	314	/* Second, create aliases array */
	315	r_aliases = buffer + idx;
	316	((char**) r_aliases)[0] = NULL;
	317	idx += sizeof(char*);
	318
	319	/* Third, append addresses */
	320	r_addr = buffer + idx;
0dd25fb9 LP	321	while ((r = sd_bus_message_enter_container(reply, 'r', "iay")) > 0) {
0dd25fb9 LP	322	int family;
cabb0bc6 LP	323	const void *a;
	324	size_t sz;
	325
0dd25fb9	326	r = sd_bus_message_read(reply, "i", &family);
cabb0bc6 LP	327	if (r < 0)
	328	goto fail;
	329
	330	r = sd_bus_message_read_array(reply, 'y', &a, &sz);
	331	if (r < 0)
	332	goto fail;
	333
	334	r = sd_bus_message_exit_container(reply);
	335	if (r < 0)
	336	goto fail;
	337
	338	if (family != af)
	339	continue;
	340
	341	if (sz != alen) {
	342	r = -EINVAL;
	343	goto fail;
	344	}
	345
	346	memcpy(r_addr + i*ALIGN(alen), a, alen);
	347	i++;
	348	}
	349
	350	assert(i == c);
	351	idx += c * ALIGN(alen);
	352
	353	r = sd_bus_message_exit_container(reply);
	354	if (r < 0)
	355	goto fail;
	356
	357	/* Third, append address pointer array */
	358	r_addr_list = buffer + idx;
	359	for (i = 0; i < c; i++)
	360	((char*) r_addr_list)[i] = r_addr + iALIGN(alen);
	361
	362	((char**) r_addr_list)[i] = NULL;
	363	idx += (c+1) * sizeof(char*);
	364
	365	assert(idx == ms);
	366
	367	result->h_name = r_name;
	368	result->h_aliases = (char**) r_aliases;
	369	result->h_addrtype = af;
	370	result->h_length = alen;
	371	result->h_addr_list = (char**) r_addr_list;
	372
	373	if (ttlp)
	374	*ttlp = 0;
	375
	376	if (canonp)
	377	*canonp = r_name;
	378
06202b9e YW	379	/* Explicitly reset both *h_errnop and h_errno to work around
06202b9e YW	380	* https://bugzilla.redhat.com/show_bug.cgi?id=1125975 */
e70df46b LP	381	*h_errnop = NETDB_SUCCESS;
	382	h_errno = 0;
	383
cabb0bc6 LP	384	return NSS_STATUS_SUCCESS;
	385
	386	fail:
cdccd29f	387	UNPROTECT_ERRNO;
0192cbdb	388	*errnop = -r;
2b0c1bfd	389	*h_errnop = NO_RECOVERY;
cabb0bc6 LP	390	return NSS_STATUS_UNAVAIL;
	391	}
	392
c01ff965 LP	393	NSS_GETHOSTBYNAME_FALLBACKS(mymachines);
	394
	395	enum nss_status _nss_mymachines_getpwnam_r(
	396	const char *name,
	397	struct passwd *pwd,
	398	char *buffer, size_t buflen,
	399	int *errnop) {
	400
38ccb557	401	return NSS_STATUS_NOTFOUND;
c01ff965 LP	402	}
	403
	404	enum nss_status _nss_mymachines_getpwuid_r(
	405	uid_t uid,
	406	struct passwd *pwd,
	407	char *buffer, size_t buflen,
	408	int *errnop) {
	409
38ccb557	410	return NSS_STATUS_NOTFOUND;
c01ff965 LP	411	}
	412
	413	enum nss_status _nss_mymachines_getgrnam_r(
	414	const char *name,
	415	struct group *gr,
	416	char *buffer, size_t buflen,
	417	int *errnop) {
	418
38ccb557	419	return NSS_STATUS_NOTFOUND;
c01ff965 LP	420	}
	421
	422	enum nss_status _nss_mymachines_getgrgid_r(
	423	gid_t gid,
	424	struct group *gr,
	425	char *buffer, size_t buflen,
	426	int *errnop) {
	427
38ccb557	428	return NSS_STATUS_NOTFOUND;
c01ff965	429	}