[thirdparty/systemd.git] / src / libsystemd-network / network-internal.c

/***
 This file is part of systemd.

 Copyright (C) 2013 Tom Gundersen <teg@jklm.no>

  systemd is free software; you can redistribute it and/or modify it
  under the terms of the GNU Lesser General Public License as published by
  the Free Software Foundation; either version 2.1 of the License, or
  (at your option) any later version.

  systemd is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public License
  along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/

#include <arpa/inet.h>
#include <linux/if.h>
#include <netinet/ether.h>

#include "sd-ndisc.h"

#include "alloc-util.h"
#include "condition.h"
#include "conf-parser.h"
#include "dhcp-lease-internal.h"
#include "hexdecoct.h"
#include "log.h"
#include "network-internal.h"
#include "parse-util.h"
#include "siphash24.h"
#include "string-util.h"
#include "strv.h"
#include "utf8.h"
#include "util.h"

const char *net_get_name(struct udev_device *device) {
        const char *name, *field;

        assert(device);

        /* fetch some persistent data unique (on this machine) to this device */
        FOREACH_STRING(field, "ID_NET_NAME_ONBOARD", "ID_NET_NAME_SLOT", "ID_NET_NAME_PATH", "ID_NET_NAME_MAC") {
                name = udev_device_get_property_value(device, field);
                if (name)
                        return name;
        }

        return NULL;
}

#define HASH_KEY SD_ID128_MAKE(d3,1e,48,fa,90,fe,4b,4c,9d,af,d5,d7,a1,b1,2e,8a)

int net_get_unique_predictable_data(struct udev_device *device, uint64_t *result) {
        size_t l, sz = 0;
        const char *name = NULL;
        int r;
        uint8_t *v;

        assert(device);

        name = net_get_name(device);
        if (!name)
                return -ENOENT;

        l = strlen(name);
        sz = sizeof(sd_id128_t) + l;
        v = alloca(sz);

        /* fetch some persistent data unique to this machine */
        r = sd_id128_get_machine((sd_id128_t*) v);
        if (r < 0)
                 return r;
        memcpy(v + sizeof(sd_id128_t), name, l);

        /* Let's hash the machine ID plus the device name. We
        * use a fixed, but originally randomly created hash
        * key here. */
        *result = htole64(siphash24(v, sz, HASH_KEY.bytes));

        return 0;
}

bool net_match_config(const struct ether_addr *match_mac,
                      char * const *match_paths,
                      char * const *match_drivers,
                      char * const *match_types,
                      char * const *match_names,
                      Condition *match_host,
                      Condition *match_virt,
                      Condition *match_kernel,
                      Condition *match_arch,
                      const struct ether_addr *dev_mac,
                      const char *dev_path,
                      const char *dev_parent_driver,
                      const char *dev_driver,
                      const char *dev_type,
                      const char *dev_name) {

        if (match_host && !condition_test(match_host))
                return false;

        if (match_virt && !condition_test(match_virt))
                return false;

        if (match_kernel && !condition_test(match_kernel))
                return false;

        if (match_arch && !condition_test(match_arch))
                return false;

        if (match_mac && (!dev_mac || memcmp(match_mac, dev_mac, ETH_ALEN)))
                return false;

        if (!strv_isempty(match_paths) &&
            (!dev_path || !strv_fnmatch(match_paths, dev_path, 0)))
                return false;

        if (!strv_isempty(match_drivers) &&
            (!dev_driver || !strv_fnmatch(match_drivers, dev_driver, 0)))
                return false;

        if (!strv_isempty(match_types) &&
            (!dev_type || !strv_fnmatch_or_empty(match_types, dev_type, 0)))
                return false;

        if (!strv_isempty(match_names) &&
            (!dev_name || !strv_fnmatch_or_empty(match_names, dev_name, 0)))
                return false;

        return true;
}

int config_parse_net_condition(const char *unit,
                               const char *filename,
                               unsigned line,
                               const char *section,
                               unsigned section_line,
                               const char *lvalue,
                               int ltype,
                               const char *rvalue,
                               void *data,
                               void *userdata) {

        ConditionType cond = ltype;
        Condition **ret = data;
        bool negate;
        Condition *c;
        _cleanup_free_ char *s = NULL;

        assert(filename);
        assert(lvalue);
        assert(rvalue);
        assert(data);

        negate = rvalue[0] == '!';
        if (negate)
                rvalue++;

        s = strdup(rvalue);
        if (!s)
                return log_oom();

        c = condition_new(cond, s, false, negate);
        if (!c)
                return log_oom();

        if (*ret)
                condition_free(*ret);

        *ret = c;
        return 0;
}

int config_parse_ifname(const char *unit,
                        const char *filename,
                        unsigned line,
                        const char *section,
                        unsigned section_line,
                        const char *lvalue,
                        int ltype,
                        const char *rvalue,
                        void *data,
                        void *userdata) {

        char **s = data;
        _cleanup_free_ char *n = NULL;

        assert(filename);
        assert(lvalue);
        assert(rvalue);
        assert(data);

        n = strdup(rvalue);
        if (!n)
                return log_oom();

        if (!ascii_is_valid(n) || strlen(n) >= IFNAMSIZ) {
                log_syntax(unit, LOG_ERR, filename, line, 0, "Interface name is not ASCII clean or is too long, ignoring assignment: %s", rvalue);
                return 0;
        }

        free(*s);
        if (*n) {
                *s = n;
                n = NULL;
        } else
                *s = NULL;

        return 0;
}

int config_parse_ifnames(const char *unit,
                        const char *filename,
                        unsigned line,
                        const char *section,
                        unsigned section_line,
                        const char *lvalue,
                        int ltype,
                        const char *rvalue,
                        void *data,
                        void *userdata) {

        char ***sv = data;
        int r;

        assert(filename);
        assert(lvalue);
        assert(rvalue);
        assert(data);

        for (;;) {
                _cleanup_free_ char *word = NULL;

                r = extract_first_word(&rvalue, &word, NULL, 0);
                if (r < 0)
                        return r;
                if (r == 0)
                        break;

                if (!ascii_is_valid(word) || strlen(word) >= IFNAMSIZ) {
                        log_syntax(unit, LOG_ERR, filename, line, 0, "Interface name is not ASCII clean or is too long, ignoring assignment: %s", rvalue);
                        return 0;
                }

                r = strv_push(sv, word);
                if (r < 0)
                        return log_oom();

                word = NULL;
        }

        return 0;
}

int config_parse_ifalias(const char *unit,
                         const char *filename,
                         unsigned line,
                         const char *section,
                         unsigned section_line,
                         const char *lvalue,
                         int ltype,
                         const char *rvalue,
                         void *data,
                         void *userdata) {

        char **s = data;
        _cleanup_free_ char *n = NULL;

        assert(filename);
        assert(lvalue);
        assert(rvalue);
        assert(data);

        n = strdup(rvalue);
        if (!n)
                return log_oom();

        if (!ascii_is_valid(n) || strlen(n) >= IFALIASZ) {
                log_syntax(unit, LOG_ERR, filename, line, 0, "Interface alias is not ASCII clean or is too long, ignoring assignment: %s", rvalue);
                return 0;
        }

        free(*s);
        if (*n) {
                *s = n;
                n = NULL;
        } else
                *s = NULL;

        return 0;
}

int config_parse_hwaddr(const char *unit,
                        const char *filename,
                        unsigned line,
                        const char *section,
                        unsigned section_line,
                        const char *lvalue,
                        int ltype,
                        const char *rvalue,
                        void *data,
                        void *userdata) {
        struct ether_addr **hwaddr = data;
        struct ether_addr *n;
        int r;

        assert(filename);
        assert(lvalue);
        assert(rvalue);
        assert(data);

        n = new0(struct ether_addr, 1);
        if (!n)
                return log_oom();

        r = sscanf(rvalue, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
                   &n->ether_addr_octet[0],
                   &n->ether_addr_octet[1],
                   &n->ether_addr_octet[2],
                   &n->ether_addr_octet[3],
                   &n->ether_addr_octet[4],
                   &n->ether_addr_octet[5]);
        if (r != 6) {
                log_syntax(unit, LOG_ERR, filename, line, 0, "Not a valid MAC address, ignoring assignment: %s", rvalue);
                free(n);
                return 0;
        }

        free(*hwaddr);
        *hwaddr = n;

        return 0;
}

int config_parse_iaid(const char *unit,
                      const char *filename,
                      unsigned line,
                      const char *section,
                      unsigned section_line,
                      const char *lvalue,
                      int ltype,
                      const char *rvalue,
                      void *data,
                      void *userdata) {
        uint32_t iaid;
        int r;

        assert(filename);
        assert(lvalue);
        assert(rvalue);
        assert(data);

        r = safe_atou32(rvalue, &iaid);
        if (r < 0) {
                log_syntax(unit, LOG_ERR, filename, line, r,
                           "Unable to read IAID, ignoring assignment: %s", rvalue);
                return 0;
        }

        *((uint32_t *)data) = iaid;

        return 0;
}

void serialize_in_addrs(FILE *f, const struct in_addr *addresses, size_t size) {
        unsigned i;

        assert(f);
        assert(addresses);
        assert(size);

        for (i = 0; i < size; i++)
                fprintf(f, "%s%s", inet_ntoa(addresses[i]),
                        (i < (size - 1)) ? " ": "");
}

int deserialize_in_addrs(struct in_addr **ret, const char *string) {
        _cleanup_free_ struct in_addr *addresses = NULL;
        int size = 0;

        assert(ret);
        assert(string);

        for (;;) {
                _cleanup_free_ char *word = NULL;
                struct in_addr *new_addresses;
                int r;

                r = extract_first_word(&string, &word, NULL, 0);
                if (r < 0)
                        return r;
                if (r == 0)
                        break;

                new_addresses = realloc(addresses, (size + 1) * sizeof(struct in_addr));
                if (!new_addresses)
                        return -ENOMEM;
                else
                        addresses = new_addresses;

                r = inet_pton(AF_INET, word, &(addresses[size]));
                if (r <= 0)
                        continue;

                size++;
        }

        *ret = addresses;
        addresses = NULL;

        return size;
}

void serialize_in6_addrs(FILE *f, const struct in6_addr *addresses,
                         size_t size) {
        unsigned i;

        assert(f);
        assert(addresses);
        assert(size);

        for (i = 0; i < size; i++)
                fprintf(f, SD_NDISC_ADDRESS_FORMAT_STR"%s",
                        SD_NDISC_ADDRESS_FORMAT_VAL(addresses[i]),
                        (i < (size - 1)) ? " ": "");
}

int deserialize_in6_addrs(struct in6_addr **ret, const char *string) {
        _cleanup_free_ struct in6_addr *addresses = NULL;
        int size = 0;

        assert(ret);
        assert(string);

        for (;;) {
                _cleanup_free_ char *word = NULL;
                struct in6_addr *new_addresses;
                int r;

                r = extract_first_word(&string, &word, NULL, 0);
                if (r < 0)
                        return r;
                if (r == 0)
                        break;

                new_addresses = realloc(addresses, (size + 1) * sizeof(struct in6_addr));
                if (!new_addresses)
                        return -ENOMEM;
                else
                        addresses = new_addresses;

                r = inet_pton(AF_INET6, word, &(addresses[size]));
                if (r <= 0)
                        continue;

                size++;
        }

        *ret = addresses;
        addresses = NULL;

        return size;
}

void serialize_dhcp_routes(FILE *f, const char *key, sd_dhcp_route **routes, size_t size) {
        unsigned i;

        assert(f);
        assert(key);
        assert(routes);
        assert(size);

        fprintf(f, "%s=", key);

        for (i = 0; i < size; i++) {
                struct in_addr dest, gw;
                uint8_t length;

                assert_se(sd_dhcp_route_get_destination(routes[i], &dest) >= 0);
                assert_se(sd_dhcp_route_get_gateway(routes[i], &gw) >= 0);
                assert_se(sd_dhcp_route_get_destination_prefix_length(routes[i], &length) >= 0);

                fprintf(f, "%s/%" PRIu8, inet_ntoa(dest), length);
                fprintf(f, ",%s%s", inet_ntoa(gw), (i < (size - 1)) ? " ": "");
        }

        fputs("\n", f);
}

int deserialize_dhcp_routes(struct sd_dhcp_route **ret, size_t *ret_size, size_t *ret_allocated, const char *string) {
        _cleanup_free_ struct sd_dhcp_route *routes = NULL;
        size_t size = 0, allocated = 0;

        assert(ret);
        assert(ret_size);
        assert(ret_allocated);
        assert(string);

         /* WORD FORMAT: dst_ip/dst_prefixlen,gw_ip */
        for (;;) {
                _cleanup_free_ char *word = NULL;
                char *tok, *tok_end;
                unsigned n;
                int r;

                r = extract_first_word(&string, &word, NULL, 0);
                if (r < 0)
                        return r;
                if (r == 0)
                        break;

                if (!GREEDY_REALLOC(routes, allocated, size + 1))
                        return -ENOMEM;

                tok = word;

                /* get the subnet */
                tok_end = strchr(tok, '/');
                if (!tok_end)
                        continue;
                *tok_end = '\0';

                r = inet_aton(tok, &routes[size].dst_addr);
                if (r == 0)
                        continue;

                tok = tok_end + 1;

                /* get the prefixlen */
                tok_end = strchr(tok, ',');
                if (!tok_end)
                        continue;

                *tok_end = '\0';

                r = safe_atou(tok, &n);
                if (r < 0 || n > 32)
                        continue;

                routes[size].dst_prefixlen = (uint8_t) n;
                tok = tok_end + 1;

                /* get the gateway */
                r = inet_aton(tok, &routes[size].gw_addr);
                if (r == 0)
                        continue;

                size++;
        }

        *ret_size = size;
        *ret_allocated = allocated;
        *ret = routes;
        routes = NULL;

        return 0;
}

int serialize_dhcp_option(FILE *f, const char *key, const void *data, size_t size) {
        _cleanup_free_ char *hex_buf = NULL;

        assert(f);
        assert(key);
        assert(data);

        hex_buf = hexmem(data, size);
        if (hex_buf == NULL)
                return -ENOMEM;

        fprintf(f, "%s=%s\n", key, hex_buf);

        return 0;
}

int deserialize_dhcp_option(void **data, size_t *data_len, const char *string) {
        assert(data);
        assert(data_len);
        assert(string);

        if (strlen(string) % 2)
                return -EINVAL;

        return unhexmem(string, strlen(string), (void **)data, data_len);
}
Commit	Line	Data
5fde13d7 TG	1	/***
	2	This file is part of systemd.
	3
	4	Copyright (C) 2013 Tom Gundersen <teg@jklm.no>
	5
	6	systemd is free software; you can redistribute it and/or modify it
	7	under the terms of the GNU Lesser General Public License as published by
	8	the Free Software Foundation; either version 2.1 of the License, or
	9	(at your option) any later version.
	10
	11	systemd is distributed in the hope that it will be useful, but
	12	WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	Lesser General Public License for more details.
	15
	16	You should have received a copy of the GNU Lesser General Public License
	17	along with systemd; If not, see <http://www.gnu.org/licenses/>.
	18	***/
	19
f5284182	20	#include <arpa/inet.h>
07630cea LP	21	#include <linux/if.h>
07630cea LP	22	#include <netinet/ether.h>
5fde13d7	23
07630cea LP	24	#include "sd-ndisc.h"
07630cea LP	25
b5efdb8a	26	#include "alloc-util.h"
07630cea LP	27	#include "condition.h"
07630cea LP	28	#include "conf-parser.h"
e1ea665e	29	#include "dhcp-lease-internal.h"
cf0fbc49	30	#include "hexdecoct.h"
be32eb9b	31	#include "log.h"
6bedfcbb LP	32	#include "network-internal.h"
6bedfcbb LP	33	#include "parse-util.h"
07630cea LP	34	#include "siphash24.h"
	35	#include "string-util.h"
	36	#include "strv.h"
5fde13d7	37	#include "utf8.h"
a12fa420	38	#include "util.h"
5fde13d7	39
fc541430	40	const char net_get_name(struct udev_device device) {
44e7b949	41	const char name, field;
fc541430 TG	42
fc541430 TG	43	assert(device);
b5db00e5 UTL	44
b5db00e5 UTL	45	/* fetch some persistent data unique (on this machine) to this device */
44e7b949	46	FOREACH_STRING(field, "ID_NET_NAME_ONBOARD", "ID_NET_NAME_SLOT", "ID_NET_NAME_PATH", "ID_NET_NAME_MAC") {
b5db00e5 UTL	47	name = udev_device_get_property_value(device, field);
b5db00e5 UTL	48	if (name)
44e7b949	49	return name;
b5db00e5 UTL	50	}
b5db00e5 UTL	51
44e7b949	52	return NULL;
fc541430 TG	53	}
	54
	55	#define HASH_KEY SD_ID128_MAKE(d3,1e,48,fa,90,fe,4b,4c,9d,af,d5,d7,a1,b1,2e,8a)
	56
dbe81cbd	57	int net_get_unique_predictable_data(struct udev_device device, uint64_t result) {
fc541430 TG	58	size_t l, sz = 0;
	59	const char *name = NULL;
	60	int r;
	61	uint8_t *v;
	62
	63	assert(device);
	64
	65	name = net_get_name(device);
b5db00e5 UTL	66	if (!name)
	67	return -ENOENT;
	68
	69	l = strlen(name);
	70	sz = sizeof(sd_id128_t) + l;
	71	v = alloca(sz);
	72
	73	/* fetch some persistent data unique to this machine */
	74	r = sd_id128_get_machine((sd_id128_t*) v);
	75	if (r < 0)
	76	return r;
	77	memcpy(v + sizeof(sd_id128_t), name, l);
	78
	79	/* Let's hash the machine ID plus the device name. We
	80	* use a fixed, but originally randomly created hash
	81	* key here. */
933f9cae	82	*result = htole64(siphash24(v, sz, HASH_KEY.bytes));
b5db00e5 UTL	83
	84	return 0;
	85	}
	86
be32eb9b	87	bool net_match_config(const struct ether_addr *match_mac,
5256e00e TG	88	char * const *match_paths,
	89	char * const *match_drivers,
	90	char * const *match_types,
	91	char * const *match_names,
2cc412b5 TG	92	Condition *match_host,
	93	Condition *match_virt,
	94	Condition *match_kernel,
edbb03e9	95	Condition *match_arch,
505f8da7	96	const struct ether_addr *dev_mac,
b3e01314	97	const char *dev_path,
bf175aaf	98	const char *dev_parent_driver,
b3e01314 TG	99	const char *dev_driver,
b3e01314 TG	100	const char *dev_type,
32bc8adc	101	const char *dev_name) {
be32eb9b	102
a4705396	103	if (match_host && !condition_test(match_host))
7eb08da4	104	return false;
2cc412b5	105
a4705396	106	if (match_virt && !condition_test(match_virt))
7eb08da4	107	return false;
2cc412b5	108
a4705396	109	if (match_kernel && !condition_test(match_kernel))
7eb08da4	110	return false;
2cc412b5	111
a4705396	112	if (match_arch && !condition_test(match_arch))
7eb08da4	113	return false;
edbb03e9	114
505f8da7	115	if (match_mac && (!dev_mac \|\| memcmp(match_mac, dev_mac, ETH_ALEN)))
7eb08da4	116	return false;
be32eb9b	117
d49dc812	118	if (!strv_isempty(match_paths) &&
2404701e	119	(!dev_path \|\| !strv_fnmatch(match_paths, dev_path, 0)))
ee5de57b	120	return false;
5256e00e	121
d49dc812	122	if (!strv_isempty(match_drivers) &&
2404701e	123	(!dev_driver \|\| !strv_fnmatch(match_drivers, dev_driver, 0)))
ee5de57b	124	return false;
5256e00e	125
d49dc812	126	if (!strv_isempty(match_types) &&
2404701e	127	(!dev_type \|\| !strv_fnmatch_or_empty(match_types, dev_type, 0)))
ee5de57b	128	return false;
5256e00e	129
d49dc812	130	if (!strv_isempty(match_names) &&
2404701e	131	(!dev_name \|\| !strv_fnmatch_or_empty(match_names, dev_name, 0)))
ee5de57b	132	return false;
5256e00e	133
7eb08da4	134	return true;
be32eb9b	135	}
5fde13d7	136
2cc412b5 TG	137	int config_parse_net_condition(const char *unit,
	138	const char *filename,
	139	unsigned line,
	140	const char *section,
	141	unsigned section_line,
	142	const char *lvalue,
	143	int ltype,
	144	const char *rvalue,
	145	void *data,
	146	void *userdata) {
	147
	148	ConditionType cond = ltype;
	149	Condition **ret = data;
	150	bool negate;
	151	Condition *c;
	152	_cleanup_free_ char *s = NULL;
	153
	154	assert(filename);
	155	assert(lvalue);
	156	assert(rvalue);
	157	assert(data);
	158
	159	negate = rvalue[0] == '!';
	160	if (negate)
	161	rvalue++;
	162
	163	s = strdup(rvalue);
	164	if (!s)
	165	return log_oom();
	166
	167	c = condition_new(cond, s, false, negate);
	168	if (!c)
	169	return log_oom();
	170
	171	if (*ret)
	172	condition_free(*ret);
	173
	174	*ret = c;
	175	return 0;
	176	}
	177
5fde13d7 TG	178	int config_parse_ifname(const char *unit,
	179	const char *filename,
	180	unsigned line,
	181	const char *section,
71a61510	182	unsigned section_line,
5fde13d7 TG	183	const char *lvalue,
	184	int ltype,
	185	const char *rvalue,
	186	void *data,
	187	void *userdata) {
	188
	189	char **s = data;
5a3f1989	190	_cleanup_free_ char *n = NULL;
5fde13d7 TG	191
	192	assert(filename);
	193	assert(lvalue);
	194	assert(rvalue);
	195	assert(data);
	196
	197	n = strdup(rvalue);
	198	if (!n)
	199	return log_oom();
	200
	201	if (!ascii_is_valid(n) \|\| strlen(n) >= IFNAMSIZ) {
12ca818f	202	log_syntax(unit, LOG_ERR, filename, line, 0, "Interface name is not ASCII clean or is too long, ignoring assignment: %s", rvalue);
5fde13d7 TG	203	return 0;
	204	}
	205
	206	free(*s);
5a3f1989	207	if (*n) {
5fde13d7	208	*s = n;
5a3f1989 TG	209	n = NULL;
5a3f1989 TG	210	} else
5fde13d7	211	*s = NULL;
5fde13d7 TG	212
	213	return 0;
	214	}
	215
5256e00e TG	216	int config_parse_ifnames(const char *unit,
	217	const char *filename,
	218	unsigned line,
	219	const char *section,
	220	unsigned section_line,
	221	const char *lvalue,
	222	int ltype,
	223	const char *rvalue,
	224	void *data,
	225	void *userdata) {
	226
	227	char ***sv = data;
5256e00e TG	228	int r;
	229
	230	assert(filename);
	231	assert(lvalue);
	232	assert(rvalue);
	233	assert(data);
	234
93e28226 SS	235	for (;;) {
93e28226 SS	236	_cleanup_free_ char *word = NULL;
5256e00e	237
93e28226 SS	238	r = extract_first_word(&rvalue, &word, NULL, 0);
	239	if (r < 0)
	240	return r;
	241	if (r == 0)
	242	break;
5256e00e	243
93e28226	244	if (!ascii_is_valid(word) \|\| strlen(word) >= IFNAMSIZ) {
12ca818f	245	log_syntax(unit, LOG_ERR, filename, line, 0, "Interface name is not ASCII clean or is too long, ignoring assignment: %s", rvalue);
5256e00e TG	246	return 0;
	247	}
	248
93e28226	249	r = strv_push(sv, word);
5256e00e TG	250	if (r < 0)
5256e00e TG	251	return log_oom();
93e28226 SS	252
93e28226 SS	253	word = NULL;
5256e00e TG	254	}
	255
	256	return 0;
	257	}
	258
d2df0d0e TG	259	int config_parse_ifalias(const char *unit,
	260	const char *filename,
	261	unsigned line,
	262	const char *section,
71a61510	263	unsigned section_line,
d2df0d0e TG	264	const char *lvalue,
	265	int ltype,
	266	const char *rvalue,
	267	void *data,
	268	void *userdata) {
	269
	270	char **s = data;
9c39eb5c	271	_cleanup_free_ char *n = NULL;
d2df0d0e TG	272
	273	assert(filename);
	274	assert(lvalue);
	275	assert(rvalue);
	276	assert(data);
	277
	278	n = strdup(rvalue);
	279	if (!n)
	280	return log_oom();
	281
	282	if (!ascii_is_valid(n) \|\| strlen(n) >= IFALIASZ) {
12ca818f	283	log_syntax(unit, LOG_ERR, filename, line, 0, "Interface alias is not ASCII clean or is too long, ignoring assignment: %s", rvalue);
d2df0d0e TG	284	return 0;
	285	}
	286
	287	free(*s);
9c39eb5c	288	if (*n) {
d2df0d0e	289	*s = n;
9c39eb5c TG	290	n = NULL;
9c39eb5c TG	291	} else
d2df0d0e	292	*s = NULL;
d2df0d0e TG	293
	294	return 0;
	295	}
	296
5fde13d7 TG	297	int config_parse_hwaddr(const char *unit,
	298	const char *filename,
	299	unsigned line,
	300	const char *section,
71a61510	301	unsigned section_line,
5fde13d7 TG	302	const char *lvalue,
	303	int ltype,
	304	const char *rvalue,
	305	void *data,
	306	void *userdata) {
	307	struct ether_addr **hwaddr = data;
	308	struct ether_addr *n;
	309	int r;
	310
	311	assert(filename);
	312	assert(lvalue);
	313	assert(rvalue);
	314	assert(data);
	315
a12fa420	316	n = new0(struct ether_addr, 1);
5fde13d7 TG	317	if (!n)
	318	return log_oom();
	319
	320	r = sscanf(rvalue, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
	321	&n->ether_addr_octet[0],
	322	&n->ether_addr_octet[1],
	323	&n->ether_addr_octet[2],
	324	&n->ether_addr_octet[3],
	325	&n->ether_addr_octet[4],
	326	&n->ether_addr_octet[5]);
	327	if (r != 6) {
12ca818f	328	log_syntax(unit, LOG_ERR, filename, line, 0, "Not a valid MAC address, ignoring assignment: %s", rvalue);
5fde13d7 TG	329	free(n);
	330	return 0;
	331	}
	332
	333	free(*hwaddr);
	334	*hwaddr = n;
	335
	336	return 0;
	337	}
f5284182	338
413708d1 VK	339	int config_parse_iaid(const char *unit,
	340	const char *filename,
	341	unsigned line,
	342	const char *section,
	343	unsigned section_line,
	344	const char *lvalue,
	345	int ltype,
	346	const char *rvalue,
	347	void *data,
	348	void *userdata) {
	349	uint32_t iaid;
	350	int r;
	351
	352	assert(filename);
	353	assert(lvalue);
	354	assert(rvalue);
	355	assert(data);
	356
	357	r = safe_atou32(rvalue, &iaid);
	358	if (r < 0) {
b7f71444 VK	359	log_syntax(unit, LOG_ERR, filename, line, r,
	360	"Unable to read IAID, ignoring assignment: %s", rvalue);
	361	return 0;
413708d1 VK	362	}
	363
	364	((uint32_t )data) = iaid;
	365
	366	return 0;
	367	}
	368
b0e39c82	369	void serialize_in_addrs(FILE f, const struct in_addr addresses, size_t size) {
09bee74d TG	370	unsigned i;
	371
	372	assert(f);
09bee74d TG	373	assert(addresses);
	374	assert(size);
	375
09bee74d TG	376	for (i = 0; i < size; i++)
	377	fprintf(f, "%s%s", inet_ntoa(addresses[i]),
	378	(i < (size - 1)) ? " ": "");
09bee74d TG	379	}
09bee74d TG	380
a2ba62c7	381	int deserialize_in_addrs(struct in_addr *ret, const char string) {
09bee74d	382	_cleanup_free_ struct in_addr *addresses = NULL;
a2ba62c7	383	int size = 0;
09bee74d TG	384
09bee74d TG	385	assert(ret);
09bee74d TG	386	assert(string);
09bee74d TG	387
93e28226 SS	388	for (;;) {
93e28226 SS	389	_cleanup_free_ char *word = NULL;
09bee74d TG	390	struct in_addr *new_addresses;
	391	int r;
	392
93e28226 SS	393	r = extract_first_word(&string, &word, NULL, 0);
	394	if (r < 0)
	395	return r;
	396	if (r == 0)
	397	break;
	398
09bee74d TG	399	new_addresses = realloc(addresses, (size + 1) * sizeof(struct in_addr));
	400	if (!new_addresses)
	401	return -ENOMEM;
	402	else
	403	addresses = new_addresses;
	404
93e28226	405	r = inet_pton(AF_INET, word, &(addresses[size]));
09bee74d TG	406	if (r <= 0)
	407	continue;
	408
313cefa1	409	size++;
09bee74d TG	410	}
09bee74d TG	411
09bee74d TG	412	*ret = addresses;
	413	addresses = NULL;
	414
a2ba62c7	415	return size;
09bee74d TG	416	}
09bee74d TG	417
b729fa14 PF	418	void serialize_in6_addrs(FILE f, const struct in6_addr addresses,
	419	size_t size) {
	420	unsigned i;
	421
	422	assert(f);
	423	assert(addresses);
	424	assert(size);
	425
	426	for (i = 0; i < size; i++)
4d7b83da TG	427	fprintf(f, SD_NDISC_ADDRESS_FORMAT_STR"%s",
4d7b83da TG	428	SD_NDISC_ADDRESS_FORMAT_VAL(addresses[i]),
b729fa14 PF	429	(i < (size - 1)) ? " ": "");
	430	}
	431
a2ba62c7	432	int deserialize_in6_addrs(struct in6_addr *ret, const char string) {
09bee74d	433	_cleanup_free_ struct in6_addr *addresses = NULL;
a2ba62c7	434	int size = 0;
09bee74d TG	435
09bee74d TG	436	assert(ret);
09bee74d TG	437	assert(string);
09bee74d TG	438
93e28226 SS	439	for (;;) {
93e28226 SS	440	_cleanup_free_ char *word = NULL;
09bee74d TG	441	struct in6_addr *new_addresses;
	442	int r;
	443
93e28226 SS	444	r = extract_first_word(&string, &word, NULL, 0);
	445	if (r < 0)
	446	return r;
	447	if (r == 0)
	448	break;
	449
09bee74d TG	450	new_addresses = realloc(addresses, (size + 1) * sizeof(struct in6_addr));
	451	if (!new_addresses)
	452	return -ENOMEM;
	453	else
	454	addresses = new_addresses;
	455
93e28226	456	r = inet_pton(AF_INET6, word, &(addresses[size]));
09bee74d TG	457	if (r <= 0)
	458	continue;
	459
	460	size++;
	461	}
	462
09bee74d TG	463	*ret = addresses;
	464	addresses = NULL;
	465
a2ba62c7	466	return size;
09bee74d	467	}
e1ea665e	468
f8693fc7	469	void serialize_dhcp_routes(FILE f, const char key, sd_dhcp_route **routes, size_t size) {
e1ea665e EY	470	unsigned i;
	471
	472	assert(f);
	473	assert(key);
	474	assert(routes);
	475	assert(size);
	476
	477	fprintf(f, "%s=", key);
	478
fbf7dcb5	479	for (i = 0; i < size; i++) {
f8693fc7 BG	480	struct in_addr dest, gw;
	481	uint8_t length;
	482
	483	assert_se(sd_dhcp_route_get_destination(routes[i], &dest) >= 0);
	484	assert_se(sd_dhcp_route_get_gateway(routes[i], &gw) >= 0);
	485	assert_se(sd_dhcp_route_get_destination_prefix_length(routes[i], &length) >= 0);
	486
	487	fprintf(f, "%s/%" PRIu8, inet_ntoa(dest), length);
	488	fprintf(f, ",%s%s", inet_ntoa(gw), (i < (size - 1)) ? " ": "");
fbf7dcb5	489	}
e1ea665e EY	490
	491	fputs("\n", f);
	492	}
	493
	494	int deserialize_dhcp_routes(struct sd_dhcp_route *ret, size_t ret_size, size_t ret_allocated, const char string) {
	495	_cleanup_free_ struct sd_dhcp_route *routes = NULL;
	496	size_t size = 0, allocated = 0;
e1ea665e EY	497
	498	assert(ret);
	499	assert(ret_size);
	500	assert(ret_allocated);
	501	assert(string);
	502
93e28226 SS	503	/* WORD FORMAT: dst_ip/dst_prefixlen,gw_ip */
	504	for (;;) {
	505	_cleanup_free_ char *word = NULL;
e1ea665e EY	506	char tok, tok_end;
	507	unsigned n;
	508	int r;
	509
93e28226 SS	510	r = extract_first_word(&string, &word, NULL, 0);
	511	if (r < 0)
	512	return r;
	513	if (r == 0)
	514	break;
e1ea665e	515
93e28226	516	if (!GREEDY_REALLOC(routes, allocated, size + 1))
31db0120	517	return -ENOMEM;
e1ea665e	518
93e28226	519	tok = word;
e1ea665e EY	520
	521	/* get the subnet */
	522	tok_end = strchr(tok, '/');
	523	if (!tok_end)
	524	continue;
	525	*tok_end = '\0';
	526
	527	r = inet_aton(tok, &routes[size].dst_addr);
	528	if (r == 0)
	529	continue;
	530
	531	tok = tok_end + 1;
	532
	533	/* get the prefixlen */
	534	tok_end = strchr(tok, ',');
	535	if (!tok_end)
	536	continue;
	537
	538	*tok_end = '\0';
	539
	540	r = safe_atou(tok, &n);
	541	if (r < 0 \|\| n > 32)
	542	continue;
	543
	544	routes[size].dst_prefixlen = (uint8_t) n;
	545	tok = tok_end + 1;
	546
	547	/* get the gateway */
	548	r = inet_aton(tok, &routes[size].gw_addr);
	549	if (r == 0)
	550	continue;
	551
	552	size++;
	553	}
	554
	555	*ret_size = size;
	556	*ret_allocated = allocated;
	557	*ret = routes;
	558	routes = NULL;
	559
	560	return 0;
	561	}
a073309f	562
e4735228	563	int serialize_dhcp_option(FILE f, const char key, const void *data, size_t size) {
a073309f AC	564	_cleanup_free_ char *hex_buf = NULL;
	565
	566	assert(f);
	567	assert(key);
	568	assert(data);
	569
	570	hex_buf = hexmem(data, size);
	571	if (hex_buf == NULL)
	572	return -ENOMEM;
	573
	574	fprintf(f, "%s=%s\n", key, hex_buf);
	575
	576	return 0;
	577	}
	578
e4735228	579	int deserialize_dhcp_option(void *data, size_t data_len, const char *string) {
a073309f AC	580	assert(data);
	581	assert(data_len);
	582	assert(string);
	583
	584	if (strlen(string) % 2)
	585	return -EINVAL;
	586
	587	return unhexmem(string, strlen(string), (void **)data, data_len);
	588	}