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

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

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

#include "sd-id128.h"
#include "sd-ndisc.h"

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

const char *net_get_name(sd_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")
                if (sd_device_get_property_value(device, field, &name) >= 0)
                        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(sd_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;
}

static bool net_condition_test_strv(char * const *raw_patterns,
                                    const char *string) {
        if (strv_isempty(raw_patterns))
                return true;

        /* If the patterns begin with "!", edit it out and negate the test. */
        if (raw_patterns[0][0] == '!') {
                char **patterns;
                size_t i, length;

                length = strv_length(raw_patterns) + 1; /* Include the NULL. */
                patterns = newa(char*, length);
                patterns[0] = raw_patterns[0] + 1; /* Skip the "!". */
                for (i = 1; i < length; i++)
                        patterns[i] = raw_patterns[i];

                return !string || !strv_fnmatch(patterns, string, 0);
        }

        return string && strv_fnmatch(raw_patterns, string, 0);
}

bool net_match_config(Set *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_cmdline,
                      Condition *match_kernel_version,
                      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) <= 0)
                return false;

        if (match_virt && condition_test(match_virt) <= 0)
                return false;

        if (match_kernel_cmdline && condition_test(match_kernel_cmdline) <= 0)
                return false;

        if (match_kernel_version && condition_test(match_kernel_version) <= 0)
                return false;

        if (match_arch && condition_test(match_arch) <= 0)
                return false;

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

        if (!net_condition_test_strv(match_paths, dev_path))
                return false;

        if (!net_condition_test_strv(match_drivers, dev_driver))
                return false;

        if (!net_condition_test_strv(match_types, dev_type))
                return false;

        if (!net_condition_test_strv(match_names, dev_name))
                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_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) {
                        log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse interface name list: %s", rvalue);
                        return 0;
                }
                if (r == 0)
                        break;

                if (!ifname_valid(word)) {
                        log_syntax(unit, LOG_ERR, filename, line, 0, "Interface name is not valid or 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;
        }

        if (isempty(n))
                *s = mfree(*s);
        else
                free_and_replace(*s, n);

        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) {

        _cleanup_free_ struct ether_addr *n = NULL;
        struct ether_addr **hwaddr = data;
        int r;

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

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

        r = ether_addr_from_string(rvalue, n);
        if (r < 0) {
                log_syntax(unit, LOG_ERR, filename, line, r, "Not a valid MAC address, ignoring assignment: %s", rvalue);
                return 0;
        }

        *hwaddr = TAKE_PTR(n);

        return 0;
}

int config_parse_hwaddrs(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) {

        _cleanup_set_free_free_ Set *s = NULL;
        const char *p = rvalue;
        Set **hwaddrs = data;
        int r;

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

        if (isempty(rvalue)) {
                /* Empty assignment resets the list */
                *hwaddrs = set_free_free(*hwaddrs);
                return 0;
        }

        s = set_new(&ether_addr_hash_ops);
        if (!s)
                return log_oom();

        for (;;) {
                _cleanup_free_ char *word = NULL;
                _cleanup_free_ struct ether_addr *n = NULL;

                r = extract_first_word(&p, &word, NULL, 0);
                if (r == 0)
                        break;
                if (r == -ENOMEM)
                        return log_oom();
                if (r < 0) {
                        log_syntax(unit, LOG_WARNING, filename, line, r, "Invalid syntax, ignoring: %s", rvalue);
                        return 0;
                }

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

                r = ether_addr_from_string(word, n);
                if (r < 0) {
                        log_syntax(unit, LOG_ERR, filename, line, 0, "Not a valid MAC address, ignoring: %s", word);
                        continue;
                }

                r = set_put(s, n);
                if (r < 0)
                        return log_oom();
                if (r > 0)
                        n = NULL; /* avoid cleanup */
        }

        r = set_ensure_allocated(hwaddrs, &ether_addr_hash_ops);
        if (r < 0)
                return log_oom();

        r = set_move(*hwaddrs, s);
        if (r < 0)
                return log_oom();

        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;
}

int config_parse_bridge_port_priority(
                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) {

        uint16_t i;
        int r;

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

        r = safe_atou16(rvalue, &i);
        if (r < 0) {
                log_syntax(unit, LOG_ERR, filename, line, r,
                           "Failed to parse bridge port priority, ignoring: %s", rvalue);
                return 0;
        }

        if (i > LINK_BRIDGE_PORT_PRIORITY_MAX) {
                log_syntax(unit, LOG_ERR, filename, line, r,
                           "Bridge port priority is larger than maximum %u, ignoring: %s", LINK_BRIDGE_PORT_PRIORITY_MAX, rvalue);
                return 0;
        }

        *((uint16_t *)data) = i;

        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 = reallocarray(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 = TAKE_PTR(addresses);

        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++) {
                char buffer[INET6_ADDRSTRLEN];

                fputs(inet_ntop(AF_INET6, addresses+i, buffer, sizeof(buffer)), f);

                if (i < size - 1)
                        fputc(' ', f);
        }
}

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 = reallocarray(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 = TAKE_PTR(addresses);

        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 = TAKE_PTR(routes);

        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;
}
Commit	Line	Data
53e1b683	1	/* SPDX-License-Identifier: LGPL-2.1+ */
5fde13d7	2
f5284182	3	#include <arpa/inet.h>
07630cea LP	4	#include <linux/if.h>
07630cea LP	5	#include <netinet/ether.h>
5fde13d7	6
dccca82b	7	#include "sd-id128.h"
07630cea LP	8	#include "sd-ndisc.h"
07630cea LP	9
b5efdb8a	10	#include "alloc-util.h"
07630cea LP	11	#include "condition.h"
07630cea LP	12	#include "conf-parser.h"
e1ea665e	13	#include "dhcp-lease-internal.h"
aa31ce18	14	#include "ether-addr-util.h"
cf0fbc49	15	#include "hexdecoct.h"
be32eb9b	16	#include "log.h"
6bedfcbb LP	17	#include "network-internal.h"
6bedfcbb LP	18	#include "parse-util.h"
07630cea	19	#include "siphash24.h"
d31645ad	20	#include "socket-util.h"
07630cea LP	21	#include "string-util.h"
07630cea LP	22	#include "strv.h"
5fde13d7	23	#include "utf8.h"
a12fa420	24	#include "util.h"
5fde13d7	25
51517f9e	26	const char net_get_name(sd_device device) {
44e7b949	27	const char name, field;
fc541430 TG	28
fc541430 TG	29	assert(device);
b5db00e5 UTL	30
b5db00e5 UTL	31	/* fetch some persistent data unique (on this machine) to this device */
51517f9e YW	32	FOREACH_STRING(field, "ID_NET_NAME_ONBOARD", "ID_NET_NAME_SLOT", "ID_NET_NAME_PATH", "ID_NET_NAME_MAC")
51517f9e YW	33	if (sd_device_get_property_value(device, field, &name) >= 0)
44e7b949	34	return name;
b5db00e5	35
44e7b949	36	return NULL;
fc541430 TG	37	}
	38
	39	#define HASH_KEY SD_ID128_MAKE(d3,1e,48,fa,90,fe,4b,4c,9d,af,d5,d7,a1,b1,2e,8a)
	40
51517f9e	41	int net_get_unique_predictable_data(sd_device device, uint64_t result) {
fc541430 TG	42	size_t l, sz = 0;
	43	const char *name = NULL;
	44	int r;
	45	uint8_t *v;
	46
	47	assert(device);
	48
	49	name = net_get_name(device);
b5db00e5 UTL	50	if (!name)
	51	return -ENOENT;
	52
	53	l = strlen(name);
	54	sz = sizeof(sd_id128_t) + l;
	55	v = alloca(sz);
	56
	57	/* fetch some persistent data unique to this machine */
	58	r = sd_id128_get_machine((sd_id128_t*) v);
	59	if (r < 0)
	60	return r;
	61	memcpy(v + sizeof(sd_id128_t), name, l);
	62
	63	/* Let's hash the machine ID plus the device name. We
	64	* use a fixed, but originally randomly created hash
	65	* key here. */
933f9cae	66	*result = htole64(siphash24(v, sz, HASH_KEY.bytes));
b5db00e5 UTL	67
	68	return 0;
	69	}
	70
1aa68db1 DM	71	static bool net_condition_test_strv(char * const *raw_patterns,
1aa68db1 DM	72	const char *string) {
618b196e DM	73	if (strv_isempty(raw_patterns))
	74	return true;
	75
	76	/* If the patterns begin with "!", edit it out and negate the test. */
	77	if (raw_patterns[0][0] == '!') {
	78	char **patterns;
da6053d0	79	size_t i, length;
618b196e DM	80
	81	length = strv_length(raw_patterns) + 1; /* Include the NULL. */
	82	patterns = newa(char*, length);
	83	patterns[0] = raw_patterns[0] + 1; /* Skip the "!". */
	84	for (i = 1; i < length; i++)
	85	patterns[i] = raw_patterns[i];
	86
	87	return !string \|\| !strv_fnmatch(patterns, string, 0);
	88	}
	89
	90	return string && strv_fnmatch(raw_patterns, string, 0);
	91	}
	92
e90d0374	93	bool net_match_config(Set *match_mac,
5256e00e TG	94	char * const *match_paths,
	95	char * const *match_drivers,
	96	char * const *match_types,
	97	char * const *match_names,
2cc412b5 TG	98	Condition *match_host,
2cc412b5 TG	99	Condition *match_virt,
5022f08a LP	100	Condition *match_kernel_cmdline,
5022f08a LP	101	Condition *match_kernel_version,
edbb03e9	102	Condition *match_arch,
505f8da7	103	const struct ether_addr *dev_mac,
b3e01314	104	const char *dev_path,
bf175aaf	105	const char *dev_parent_driver,
b3e01314 TG	106	const char *dev_driver,
b3e01314 TG	107	const char *dev_type,
32bc8adc	108	const char *dev_name) {
be32eb9b	109
2cb62395	110	if (match_host && condition_test(match_host) <= 0)
7eb08da4	111	return false;
2cc412b5	112
2cb62395	113	if (match_virt && condition_test(match_virt) <= 0)
7eb08da4	114	return false;
2cc412b5	115
5022f08a LP	116	if (match_kernel_cmdline && condition_test(match_kernel_cmdline) <= 0)
	117	return false;
	118
	119	if (match_kernel_version && condition_test(match_kernel_version) <= 0)
7eb08da4	120	return false;
2cc412b5	121
2cb62395	122	if (match_arch && condition_test(match_arch) <= 0)
7eb08da4	123	return false;
edbb03e9	124
25ea58d3	125	if (match_mac && (!dev_mac \|\| !set_contains(match_mac, dev_mac)))
7eb08da4	126	return false;
be32eb9b	127
618b196e	128	if (!net_condition_test_strv(match_paths, dev_path))
ee5de57b	129	return false;
5256e00e	130
618b196e	131	if (!net_condition_test_strv(match_drivers, dev_driver))
ee5de57b	132	return false;
5256e00e	133
618b196e	134	if (!net_condition_test_strv(match_types, dev_type))
ee5de57b	135	return false;
5256e00e	136
618b196e	137	if (!net_condition_test_strv(match_names, dev_name))
ee5de57b	138	return false;
5256e00e	139
7eb08da4	140	return true;
be32eb9b	141	}
5fde13d7	142
2cc412b5 TG	143	int config_parse_net_condition(const char *unit,
	144	const char *filename,
	145	unsigned line,
	146	const char *section,
	147	unsigned section_line,
	148	const char *lvalue,
	149	int ltype,
	150	const char *rvalue,
	151	void *data,
	152	void *userdata) {
	153
	154	ConditionType cond = ltype;
	155	Condition **ret = data;
	156	bool negate;
	157	Condition *c;
	158	_cleanup_free_ char *s = NULL;
	159
	160	assert(filename);
	161	assert(lvalue);
	162	assert(rvalue);
	163	assert(data);
	164
	165	negate = rvalue[0] == '!';
	166	if (negate)
	167	rvalue++;
	168
	169	s = strdup(rvalue);
	170	if (!s)
	171	return log_oom();
	172
	173	c = condition_new(cond, s, false, negate);
	174	if (!c)
	175	return log_oom();
	176
	177	if (*ret)
	178	condition_free(*ret);
	179
	180	*ret = c;
	181	return 0;
	182	}
	183
d31645ad LP	184	int config_parse_ifnames(
	185	const char *unit,
	186	const char *filename,
	187	unsigned line,
	188	const char *section,
	189	unsigned section_line,
	190	const char *lvalue,
	191	int ltype,
	192	const char *rvalue,
	193	void *data,
	194	void *userdata) {
5256e00e TG	195
5256e00e TG	196	char ***sv = data;
5256e00e TG	197	int r;
	198
	199	assert(filename);
	200	assert(lvalue);
	201	assert(rvalue);
	202	assert(data);
	203
93e28226 SS	204	for (;;) {
93e28226 SS	205	_cleanup_free_ char *word = NULL;
5256e00e	206
93e28226	207	r = extract_first_word(&rvalue, &word, NULL, 0);
a9dd908d LP	208	if (r < 0) {
	209	log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse interface name list: %s", rvalue);
	210	return 0;
	211	}
93e28226 SS	212	if (r == 0)
93e28226 SS	213	break;
5256e00e	214
d31645ad LP	215	if (!ifname_valid(word)) {
d31645ad LP	216	log_syntax(unit, LOG_ERR, filename, line, 0, "Interface name is not valid or too long, ignoring assignment: %s", rvalue);
5256e00e TG	217	return 0;
	218	}
	219
93e28226	220	r = strv_push(sv, word);
5256e00e TG	221	if (r < 0)
5256e00e TG	222	return log_oom();
93e28226 SS	223
93e28226 SS	224	word = NULL;
5256e00e TG	225	}
	226
	227	return 0;
	228	}
	229
d2df0d0e TG	230	int config_parse_ifalias(const char *unit,
	231	const char *filename,
	232	unsigned line,
	233	const char *section,
71a61510	234	unsigned section_line,
d2df0d0e TG	235	const char *lvalue,
	236	int ltype,
	237	const char *rvalue,
	238	void *data,
	239	void *userdata) {
	240
	241	char **s = data;
9c39eb5c	242	_cleanup_free_ char *n = NULL;
d2df0d0e TG	243
	244	assert(filename);
	245	assert(lvalue);
	246	assert(rvalue);
	247	assert(data);
	248
	249	n = strdup(rvalue);
	250	if (!n)
	251	return log_oom();
	252
	253	if (!ascii_is_valid(n) \|\| strlen(n) >= IFALIASZ) {
12ca818f	254	log_syntax(unit, LOG_ERR, filename, line, 0, "Interface alias is not ASCII clean or is too long, ignoring assignment: %s", rvalue);
d2df0d0e TG	255	return 0;
	256	}
	257
44386b44 YW	258	if (isempty(n))
44386b44 YW	259	s = mfree(s);
ae2a15bc	260	else
44386b44	261	free_and_replace(*s, n);
d2df0d0e TG	262
	263	return 0;
	264	}
	265
5fde13d7 TG	266	int config_parse_hwaddr(const char *unit,
	267	const char *filename,
	268	unsigned line,
	269	const char *section,
71a61510	270	unsigned section_line,
5fde13d7 TG	271	const char *lvalue,
	272	int ltype,
	273	const char *rvalue,
	274	void *data,
	275	void *userdata) {
e5c1be89 YW	276
e5c1be89 YW	277	_cleanup_free_ struct ether_addr *n = NULL;
5fde13d7	278	struct ether_addr **hwaddr = data;
5fde13d7 TG	279	int r;
	280
	281	assert(filename);
	282	assert(lvalue);
	283	assert(rvalue);
	284	assert(data);
	285
a12fa420	286	n = new0(struct ether_addr, 1);
5fde13d7 TG	287	if (!n)
	288	return log_oom();
	289
e5c1be89 YW	290	r = ether_addr_from_string(rvalue, n);
	291	if (r < 0) {
	292	log_syntax(unit, LOG_ERR, filename, line, r, "Not a valid MAC address, ignoring assignment: %s", rvalue);
5fde13d7 TG	293	return 0;
	294	}
	295
e5c1be89	296	*hwaddr = TAKE_PTR(n);
5fde13d7 TG	297
	298	return 0;
	299	}
f5284182	300
206b63ee YW	301	int config_parse_hwaddrs(const char *unit,
	302	const char *filename,
	303	unsigned line,
	304	const char *section,
	305	unsigned section_line,
	306	const char *lvalue,
	307	int ltype,
	308	const char *rvalue,
	309	void *data,
	310	void *userdata) {
	311
	312	_cleanup_set_free_free_ Set *s = NULL;
	313	const char *p = rvalue;
	314	Set **hwaddrs = data;
	315	int r;
	316
	317	assert(filename);
	318	assert(lvalue);
	319	assert(rvalue);
	320	assert(data);
	321
	322	if (isempty(rvalue)) {
	323	/* Empty assignment resets the list */
e90d0374	324	hwaddrs = set_free_free(hwaddrs);
206b63ee YW	325	return 0;
	326	}
	327
	328	s = set_new(&ether_addr_hash_ops);
	329	if (!s)
	330	return log_oom();
	331
	332	for (;;) {
	333	_cleanup_free_ char *word = NULL;
	334	_cleanup_free_ struct ether_addr *n = NULL;
	335
	336	r = extract_first_word(&p, &word, NULL, 0);
	337	if (r == 0)
	338	break;
	339	if (r == -ENOMEM)
	340	return log_oom();
	341	if (r < 0) {
	342	log_syntax(unit, LOG_WARNING, filename, line, r, "Invalid syntax, ignoring: %s", rvalue);
	343	return 0;
	344	}
	345
e90d0374	346	n = new(struct ether_addr, 1);
206b63ee YW	347	if (!n)
	348	return log_oom();
	349
	350	r = ether_addr_from_string(word, n);
	351	if (r < 0) {
	352	log_syntax(unit, LOG_ERR, filename, line, 0, "Not a valid MAC address, ignoring: %s", word);
	353	continue;
	354	}
	355
	356	r = set_put(s, n);
	357	if (r < 0)
	358	return log_oom();
	359	if (r > 0)
	360	n = NULL; /* avoid cleanup */
	361	}
	362
	363	r = set_ensure_allocated(hwaddrs, &ether_addr_hash_ops);
	364	if (r < 0)
	365	return log_oom();
	366
	367	r = set_move(*hwaddrs, s);
	368	if (r < 0)
	369	return log_oom();
	370
	371	return 0;
	372	}
	373
413708d1 VK	374	int config_parse_iaid(const char *unit,
	375	const char *filename,
	376	unsigned line,
	377	const char *section,
	378	unsigned section_line,
	379	const char *lvalue,
	380	int ltype,
	381	const char *rvalue,
	382	void *data,
	383	void *userdata) {
	384	uint32_t iaid;
	385	int r;
	386
	387	assert(filename);
	388	assert(lvalue);
	389	assert(rvalue);
	390	assert(data);
	391
	392	r = safe_atou32(rvalue, &iaid);
	393	if (r < 0) {
b7f71444 VK	394	log_syntax(unit, LOG_ERR, filename, line, r,
	395	"Unable to read IAID, ignoring assignment: %s", rvalue);
	396	return 0;
413708d1 VK	397	}
	398
	399	((uint32_t )data) = iaid;
	400
	401	return 0;
	402	}
	403
f00ff0de DJL	404	int config_parse_bridge_port_priority(
	405	const char *unit,
	406	const char *filename,
	407	unsigned line,
	408	const char *section,
	409	unsigned section_line,
	410	const char *lvalue,
	411	int ltype,
	412	const char *rvalue,
	413	void *data,
	414	void *userdata) {
	415
	416	uint16_t i;
	417	int r;
	418
	419	assert(filename);
	420	assert(lvalue);
	421	assert(rvalue);
	422	assert(data);
	423
	424	r = safe_atou16(rvalue, &i);
	425	if (r < 0) {
	426	log_syntax(unit, LOG_ERR, filename, line, r,
	427	"Failed to parse bridge port priority, ignoring: %s", rvalue);
	428	return 0;
	429	}
	430
	431	if (i > LINK_BRIDGE_PORT_PRIORITY_MAX) {
	432	log_syntax(unit, LOG_ERR, filename, line, r,
	433	"Bridge port priority is larger than maximum %u, ignoring: %s", LINK_BRIDGE_PORT_PRIORITY_MAX, rvalue);
	434	return 0;
	435	}
	436
	437	((uint16_t )data) = i;
	438
	439	return 0;
	440	}
	441
b0e39c82	442	void serialize_in_addrs(FILE f, const struct in_addr addresses, size_t size) {
09bee74d TG	443	unsigned i;
	444
	445	assert(f);
09bee74d TG	446	assert(addresses);
	447	assert(size);
	448
09bee74d TG	449	for (i = 0; i < size; i++)
	450	fprintf(f, "%s%s", inet_ntoa(addresses[i]),
	451	(i < (size - 1)) ? " ": "");
09bee74d TG	452	}
09bee74d TG	453
a2ba62c7	454	int deserialize_in_addrs(struct in_addr *ret, const char string) {
09bee74d	455	_cleanup_free_ struct in_addr *addresses = NULL;
a2ba62c7	456	int size = 0;
09bee74d TG	457
09bee74d TG	458	assert(ret);
09bee74d TG	459	assert(string);
09bee74d TG	460
93e28226 SS	461	for (;;) {
93e28226 SS	462	_cleanup_free_ char *word = NULL;
09bee74d TG	463	struct in_addr *new_addresses;
	464	int r;
	465
93e28226 SS	466	r = extract_first_word(&string, &word, NULL, 0);
	467	if (r < 0)
	468	return r;
	469	if (r == 0)
	470	break;
	471
62d74c78	472	new_addresses = reallocarray(addresses, size + 1, sizeof(struct in_addr));
09bee74d TG	473	if (!new_addresses)
	474	return -ENOMEM;
	475	else
	476	addresses = new_addresses;
	477
93e28226	478	r = inet_pton(AF_INET, word, &(addresses[size]));
09bee74d TG	479	if (r <= 0)
	480	continue;
	481
313cefa1	482	size++;
09bee74d TG	483	}
09bee74d TG	484
ae2a15bc	485	*ret = TAKE_PTR(addresses);
09bee74d	486
a2ba62c7	487	return size;
09bee74d TG	488	}
09bee74d TG	489
1f152e4b	490	void serialize_in6_addrs(FILE f, const struct in6_addr addresses, size_t size) {
b729fa14 PF	491	unsigned i;
	492
	493	assert(f);
	494	assert(addresses);
	495	assert(size);
	496
1f152e4b LP	497	for (i = 0; i < size; i++) {
	498	char buffer[INET6_ADDRSTRLEN];
	499
	500	fputs(inet_ntop(AF_INET6, addresses+i, buffer, sizeof(buffer)), f);
	501
	502	if (i < size - 1)
	503	fputc(' ', f);
	504	}
b729fa14 PF	505	}
b729fa14 PF	506
a2ba62c7	507	int deserialize_in6_addrs(struct in6_addr *ret, const char string) {
09bee74d	508	_cleanup_free_ struct in6_addr *addresses = NULL;
a2ba62c7	509	int size = 0;
09bee74d TG	510
09bee74d TG	511	assert(ret);
09bee74d TG	512	assert(string);
09bee74d TG	513
93e28226 SS	514	for (;;) {
93e28226 SS	515	_cleanup_free_ char *word = NULL;
09bee74d TG	516	struct in6_addr *new_addresses;
	517	int r;
	518
93e28226 SS	519	r = extract_first_word(&string, &word, NULL, 0);
	520	if (r < 0)
	521	return r;
	522	if (r == 0)
	523	break;
	524
62d74c78	525	new_addresses = reallocarray(addresses, size + 1, sizeof(struct in6_addr));
09bee74d TG	526	if (!new_addresses)
	527	return -ENOMEM;
	528	else
	529	addresses = new_addresses;
	530
93e28226	531	r = inet_pton(AF_INET6, word, &(addresses[size]));
09bee74d TG	532	if (r <= 0)
	533	continue;
	534
	535	size++;
	536	}
	537
ae2a15bc	538	*ret = TAKE_PTR(addresses);
09bee74d	539
a2ba62c7	540	return size;
09bee74d	541	}
e1ea665e	542
f8693fc7	543	void serialize_dhcp_routes(FILE f, const char key, sd_dhcp_route **routes, size_t size) {
e1ea665e EY	544	unsigned i;
	545
	546	assert(f);
	547	assert(key);
	548	assert(routes);
	549	assert(size);
	550
	551	fprintf(f, "%s=", key);
	552
fbf7dcb5	553	for (i = 0; i < size; i++) {
f8693fc7 BG	554	struct in_addr dest, gw;
	555	uint8_t length;
	556
	557	assert_se(sd_dhcp_route_get_destination(routes[i], &dest) >= 0);
	558	assert_se(sd_dhcp_route_get_gateway(routes[i], &gw) >= 0);
	559	assert_se(sd_dhcp_route_get_destination_prefix_length(routes[i], &length) >= 0);
	560
	561	fprintf(f, "%s/%" PRIu8, inet_ntoa(dest), length);
	562	fprintf(f, ",%s%s", inet_ntoa(gw), (i < (size - 1)) ? " ": "");
fbf7dcb5	563	}
e1ea665e EY	564
	565	fputs("\n", f);
	566	}
	567
	568	int deserialize_dhcp_routes(struct sd_dhcp_route *ret, size_t ret_size, size_t ret_allocated, const char string) {
	569	_cleanup_free_ struct sd_dhcp_route *routes = NULL;
	570	size_t size = 0, allocated = 0;
e1ea665e EY	571
	572	assert(ret);
	573	assert(ret_size);
	574	assert(ret_allocated);
	575	assert(string);
	576
93e28226 SS	577	/* WORD FORMAT: dst_ip/dst_prefixlen,gw_ip */
	578	for (;;) {
	579	_cleanup_free_ char *word = NULL;
e1ea665e EY	580	char tok, tok_end;
	581	unsigned n;
	582	int r;
	583
93e28226 SS	584	r = extract_first_word(&string, &word, NULL, 0);
	585	if (r < 0)
	586	return r;
	587	if (r == 0)
	588	break;
e1ea665e	589
93e28226	590	if (!GREEDY_REALLOC(routes, allocated, size + 1))
31db0120	591	return -ENOMEM;
e1ea665e	592
93e28226	593	tok = word;
e1ea665e EY	594
	595	/* get the subnet */
	596	tok_end = strchr(tok, '/');
	597	if (!tok_end)
	598	continue;
	599	*tok_end = '\0';
	600
	601	r = inet_aton(tok, &routes[size].dst_addr);
	602	if (r == 0)
	603	continue;
	604
	605	tok = tok_end + 1;
	606
	607	/* get the prefixlen */
	608	tok_end = strchr(tok, ',');
	609	if (!tok_end)
	610	continue;
	611
	612	*tok_end = '\0';
	613
	614	r = safe_atou(tok, &n);
	615	if (r < 0 \|\| n > 32)
	616	continue;
	617
	618	routes[size].dst_prefixlen = (uint8_t) n;
	619	tok = tok_end + 1;
	620
	621	/* get the gateway */
	622	r = inet_aton(tok, &routes[size].gw_addr);
	623	if (r == 0)
	624	continue;
	625
	626	size++;
	627	}
	628
	629	*ret_size = size;
	630	*ret_allocated = allocated;
ae2a15bc	631	*ret = TAKE_PTR(routes);
e1ea665e EY	632
	633	return 0;
	634	}
a073309f	635
e4735228	636	int serialize_dhcp_option(FILE f, const char key, const void *data, size_t size) {
a073309f AC	637	_cleanup_free_ char *hex_buf = NULL;
	638
	639	assert(f);
	640	assert(key);
	641	assert(data);
	642
	643	hex_buf = hexmem(data, size);
	644	if (hex_buf == NULL)
	645	return -ENOMEM;
	646
	647	fprintf(f, "%s=%s\n", key, hex_buf);
	648
	649	return 0;
	650	}