[thirdparty/systemd.git] / src / network / networkd-address-label.c

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

#include <net/if.h>
#include <linux/if_addrlabel.h>

#include "alloc-util.h"
#include "conf-parser.h"
#include "networkd-address-label.h"
#include "netlink-util.h"
#include "networkd-manager.h"
#include "parse-util.h"
#include "socket-util.h"

void address_label_free(AddressLabel *label) {
        if (!label)
                return;

        if (label->network) {
                LIST_REMOVE(labels, label->network->address_labels, label);
                assert(label->network->n_address_labels > 0);
                label->network->n_address_labels--;

                if (label->section) {
                        hashmap_remove(label->network->address_labels_by_section, label->section);
                        network_config_section_free(label->section);
                }
        }

        free(label);
}

static int address_label_new_static(Network *network, const char *filename, unsigned section_line, AddressLabel **ret) {
        _cleanup_(network_config_section_freep) NetworkConfigSection *n = NULL;
        _cleanup_(address_label_freep) AddressLabel *label = NULL;
        int r;

        assert(network);
        assert(ret);
        assert(!!filename == (section_line > 0));

        if (filename) {
                r = network_config_section_new(filename, section_line, &n);
                if (r < 0)
                        return r;

                label = hashmap_get(network->address_labels_by_section, n);
                if (label) {
                        *ret = TAKE_PTR(label);

                        return 0;
                }
        }

        label = new(AddressLabel, 1);
        if (!label)
                return -ENOMEM;

        *label = (AddressLabel) {
                .network = network,
        };

        LIST_APPEND(labels, network->address_labels, label);
        network->n_address_labels++;

        if (filename) {
                label->section = TAKE_PTR(n);

                r = hashmap_ensure_allocated(&network->address_labels_by_section, &network_config_hash_ops);
                if (r < 0)
                        return r;

                r = hashmap_put(network->address_labels_by_section, label->section, label);
                if (r < 0)
                        return r;
        }

        *ret = TAKE_PTR(label);

        return 0;
}

static int address_label_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
        int r;

        assert(rtnl);
        assert(m);
        assert(link);
        assert(link->ifname);
        assert(link->address_label_messages > 0);

        link->address_label_messages--;

        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
                return 1;

        r = sd_netlink_message_get_errno(m);
        if (r < 0 && r != -EEXIST) {
                log_link_message_warning_errno(link, m, r, "Could not set address label");
                link_enter_failed(link);
                return 1;
        } else if (r >= 0)
                (void) manager_rtnl_process_address(rtnl, m, link->manager);

        if (link->address_label_messages == 0)
                log_link_debug(link, "Addresses label set");

        return 1;
}

int address_label_configure(
                AddressLabel *label,
                Link *link,
                link_netlink_message_handler_t callback,
                bool update) {

        _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
        int r;

        assert(label);
        assert(link);
        assert(link->ifindex > 0);
        assert(link->manager);
        assert(link->manager->rtnl);

        r = sd_rtnl_message_new_addrlabel(link->manager->rtnl, &req, RTM_NEWADDRLABEL,
                                          link->ifindex, AF_INET6);
        if (r < 0)
                return log_link_error_errno(link, r, "Could not allocate RTM_NEWADDR message: %m");

        r = sd_rtnl_message_addrlabel_set_prefixlen(req, label->prefixlen);
        if (r < 0)
                return log_link_error_errno(link, r, "Could not set prefixlen: %m");

        r = sd_netlink_message_append_u32(req, IFAL_LABEL, label->label);
        if (r < 0)
                return log_link_error_errno(link, r, "Could not append IFAL_LABEL attribute: %m");

        r = sd_netlink_message_append_in6_addr(req, IFA_ADDRESS, &label->in_addr.in6);
        if (r < 0)
                return log_link_error_errno(link, r, "Could not append IFA_ADDRESS attribute: %m");

        r = netlink_call_async(link->manager->rtnl, NULL, req,
                               callback ?: address_label_handler,
                               link_netlink_destroy_callback, link);
        if (r < 0)
                return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");

        link_ref(link);

        return 0;
}

int config_parse_address_label_prefix(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_(address_label_free_or_set_invalidp) AddressLabel *n = NULL;
        Network *network = userdata;
        int r;

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

        r = address_label_new_static(network, filename, section_line, &n);
        if (r < 0)
                return log_oom();

        r = in_addr_prefix_from_string(rvalue, AF_INET6, &n->in_addr, &n->prefixlen);
        if (r < 0) {
                log_syntax(unit, LOG_WARNING, filename, line, r, "Address label is invalid, ignoring assignment: %s", rvalue);
                return 0;
        }

        n = NULL;

        return 0;
}

int config_parse_address_label(
                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_(address_label_free_or_set_invalidp) AddressLabel *n = NULL;
        Network *network = userdata;
        uint32_t k;
        int r;

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

        r = address_label_new_static(network, filename, section_line, &n);
        if (r < 0)
                return log_oom();

        r = safe_atou32(rvalue, &k);
        if (r < 0) {
                log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse address label, ignoring: %s", rvalue);
                return 0;
        }

        if (k == 0xffffffffUL) {
                log_syntax(unit, LOG_WARNING, filename, line, 0, "Address label is invalid, ignoring: %s", rvalue);
                return 0;
        }

        n->label = k;
        n = NULL;

        return 0;
}
Commit	Line	Data
53e1b683	1	/* SPDX-License-Identifier: LGPL-2.1+ */
95b74ef6 SS	2
	3	#include <net/if.h>
	4	#include <linux/if_addrlabel.h>
	5
	6	#include "alloc-util.h"
	7	#include "conf-parser.h"
	8	#include "networkd-address-label.h"
	9	#include "netlink-util.h"
	10	#include "networkd-manager.h"
	11	#include "parse-util.h"
	12	#include "socket-util.h"
	13
95b74ef6 SS	14	void address_label_free(AddressLabel *label) {
	15	if (!label)
	16	return;
	17
	18	if (label->network) {
	19	LIST_REMOVE(labels, label->network->address_labels, label);
	20	assert(label->network->n_address_labels > 0);
	21	label->network->n_address_labels--;
	22
	23	if (label->section) {
	24	hashmap_remove(label->network->address_labels_by_section, label->section);
	25	network_config_section_free(label->section);
	26	}
	27	}
	28
	29	free(label);
	30	}
	31
	32	static int address_label_new_static(Network network, const char filename, unsigned section_line, AddressLabel **ret) {
8e766630 LP	33	_cleanup_(network_config_section_freep) NetworkConfigSection *n = NULL;
8e766630 LP	34	_cleanup_(address_label_freep) AddressLabel *label = NULL;
95b74ef6 SS	35	int r;
	36
	37	assert(network);
	38	assert(ret);
	39	assert(!!filename == (section_line > 0));
	40
0f7f2769 YW	41	if (filename) {
	42	r = network_config_section_new(filename, section_line, &n);
	43	if (r < 0)
	44	return r;
95b74ef6	45
0f7f2769 YW	46	label = hashmap_get(network->address_labels_by_section, n);
	47	if (label) {
	48	*ret = TAKE_PTR(label);
95b74ef6	49
0f7f2769 YW	50	return 0;
0f7f2769 YW	51	}
95b74ef6 SS	52	}
95b74ef6 SS	53
0f7f2769 YW	54	label = new(AddressLabel, 1);
	55	if (!label)
	56	return -ENOMEM;
95b74ef6	57
0f7f2769 YW	58	*label = (AddressLabel) {
	59	.network = network,
	60	};
95b74ef6	61
95b74ef6 SS	62	LIST_APPEND(labels, network->address_labels, label);
	63	network->n_address_labels++;
	64
0f7f2769 YW	65	if (filename) {
	66	label->section = TAKE_PTR(n);
	67
3e570042 YW	68	r = hashmap_ensure_allocated(&network->address_labels_by_section, &network_config_hash_ops);
	69	if (r < 0)
	70	return r;
	71
0f7f2769 YW	72	r = hashmap_put(network->address_labels_by_section, label->section, label);
	73	if (r < 0)
	74	return r;
	75	}
	76
1cc6c93a	77	*ret = TAKE_PTR(label);
95b74ef6 SS	78
	79	return 0;
	80	}
	81
302a796f	82	static int address_label_handler(sd_netlink rtnl, sd_netlink_message m, Link *link) {
cccf9517 YW	83	int r;
	84
	85	assert(rtnl);
	86	assert(m);
	87	assert(link);
	88	assert(link->ifname);
	89	assert(link->address_label_messages > 0);
	90
	91	link->address_label_messages--;
	92
	93	if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
	94	return 1;
	95
	96	r = sd_netlink_message_get_errno(m);
4ff296b0	97	if (r < 0 && r != -EEXIST) {
5ecb131d	98	log_link_message_warning_errno(link, m, r, "Could not set address label");
4ff296b0 YW	99	link_enter_failed(link);
	100	return 1;
	101	} else if (r >= 0)
	102	(void) manager_rtnl_process_address(rtnl, m, link->manager);
cccf9517 YW	103
	104	if (link->address_label_messages == 0)
	105	log_link_debug(link, "Addresses label set");
	106
	107	return 1;
	108	}
	109
95b74ef6 SS	110	int address_label_configure(
	111	AddressLabel *label,
	112	Link *link,
302a796f	113	link_netlink_message_handler_t callback,
95b74ef6 SS	114	bool update) {
	115
	116	_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
	117	int r;
	118
	119	assert(label);
	120	assert(link);
	121	assert(link->ifindex > 0);
	122	assert(link->manager);
	123	assert(link->manager->rtnl);
	124
	125	r = sd_rtnl_message_new_addrlabel(link->manager->rtnl, &req, RTM_NEWADDRLABEL,
f7bf1abe	126	link->ifindex, AF_INET6);
95b74ef6	127	if (r < 0)
98b02994	128	return log_link_error_errno(link, r, "Could not allocate RTM_NEWADDR message: %m");
95b74ef6 SS	129
	130	r = sd_rtnl_message_addrlabel_set_prefixlen(req, label->prefixlen);
	131	if (r < 0)
98b02994	132	return log_link_error_errno(link, r, "Could not set prefixlen: %m");
95b74ef6 SS	133
	134	r = sd_netlink_message_append_u32(req, IFAL_LABEL, label->label);
	135	if (r < 0)
98b02994	136	return log_link_error_errno(link, r, "Could not append IFAL_LABEL attribute: %m");
95b74ef6 SS	137
	138	r = sd_netlink_message_append_in6_addr(req, IFA_ADDRESS, &label->in_addr.in6);
	139	if (r < 0)
98b02994	140	return log_link_error_errno(link, r, "Could not append IFA_ADDRESS attribute: %m");
95b74ef6	141
302a796f YW	142	r = netlink_call_async(link->manager->rtnl, NULL, req,
	143	callback ?: address_label_handler,
	144	link_netlink_destroy_callback, link);
95b74ef6	145	if (r < 0)
98b02994	146	return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
95b74ef6 SS	147
	148	link_ref(link);
	149
	150	return 0;
	151	}
	152
	153	int config_parse_address_label_prefix(const char *unit,
	154	const char *filename,
	155	unsigned line,
	156	const char *section,
	157	unsigned section_line,
	158	const char *lvalue,
	159	int ltype,
	160	const char *rvalue,
	161	void *data,
	162	void *userdata) {
	163
fcbf4cb7	164	_cleanup_(address_label_free_or_set_invalidp) AddressLabel *n = NULL;
95b74ef6	165	Network *network = userdata;
f7bf1abe	166	int r;
95b74ef6 SS	167
	168	assert(filename);
	169	assert(section);
	170	assert(lvalue);
	171	assert(rvalue);
	172	assert(data);
	173
	174	r = address_label_new_static(network, filename, section_line, &n);
	175	if (r < 0)
d96edb2c	176	return log_oom();
95b74ef6	177
f7bf1abe	178	r = in_addr_prefix_from_string(rvalue, AF_INET6, &n->in_addr, &n->prefixlen);
95b74ef6	179	if (r < 0) {
d96edb2c	180	log_syntax(unit, LOG_WARNING, filename, line, r, "Address label is invalid, ignoring assignment: %s", rvalue);
95b74ef6 SS	181	return 0;
	182	}
	183
95b74ef6 SS	184	n = NULL;
	185
	186	return 0;
	187	}
	188
	189	int config_parse_address_label(
	190	const char *unit,
	191	const char *filename,
	192	unsigned line,
	193	const char *section,
	194	unsigned section_line,
	195	const char *lvalue,
	196	int ltype,
	197	const char *rvalue,
	198	void *data,
	199	void *userdata) {
	200
fcbf4cb7	201	_cleanup_(address_label_free_or_set_invalidp) AddressLabel *n = NULL;
95b74ef6 SS	202	Network *network = userdata;
	203	uint32_t k;
	204	int r;
	205
	206	assert(filename);
	207	assert(section);
	208	assert(lvalue);
	209	assert(rvalue);
	210	assert(data);
	211
	212	r = address_label_new_static(network, filename, section_line, &n);
	213	if (r < 0)
d96edb2c	214	return log_oom();
95b74ef6 SS	215
	216	r = safe_atou32(rvalue, &k);
	217	if (r < 0) {
d96edb2c	218	log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse address label, ignoring: %s", rvalue);
95b74ef6 SS	219	return 0;
	220	}
	221
	222	if (k == 0xffffffffUL) {
d96edb2c	223	log_syntax(unit, LOG_WARNING, filename, line, 0, "Address label is invalid, ignoring: %s", rvalue);
95b74ef6 SS	224	return 0;
	225	}
	226
	227	n->label = k;
	228	n = NULL;
	229
	230	return 0;
	231	}