[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"

int address_label_new(AddressLabel **ret) {
        _cleanup_(address_label_freep) AddressLabel *addrlabel = NULL;

        addrlabel = new0(AddressLabel, 1);
        if (!addrlabel)
                return -ENOMEM;

        *ret = TAKE_PTR(addrlabel);

        return 0;
}

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));

        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;
        }

        r = address_label_new(&label);
        if (r < 0)
                return r;

        label->section = TAKE_PTR(n);

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

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

        *ret = TAKE_PTR(label);

        return 0;
}

int address_label_configure(
                AddressLabel *label,
                Link *link,
                sd_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_error_errno(r, "Could not allocate RTM_NEWADDR message: %m");

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

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

        r = sd_netlink_call_async(link->manager->rtnl, NULL, req, callback,
                                  link_netlink_destroy_callback, link, 0, __func__);
        if (r < 0)
                return log_error_errno(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_freep) 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 r;

        r = in_addr_prefix_from_string(rvalue, AF_INET6, &n->in_addr, &n->prefixlen);
        if (r < 0) {
                log_syntax(unit, LOG_ERR, 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_freep) 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 r;

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

        if (k == 0xffffffffUL) {
                log_syntax(unit, LOG_ERR, filename, line, r, "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
	14	int address_label_new(AddressLabel **ret) {
8e766630	15	_cleanup_(address_label_freep) AddressLabel *addrlabel = NULL;
95b74ef6 SS	16
	17	addrlabel = new0(AddressLabel, 1);
	18	if (!addrlabel)
	19	return -ENOMEM;
	20
1cc6c93a	21	*ret = TAKE_PTR(addrlabel);
95b74ef6 SS	22
	23	return 0;
	24	}
	25
	26	void address_label_free(AddressLabel *label) {
	27	if (!label)
	28	return;
	29
	30	if (label->network) {
	31	LIST_REMOVE(labels, label->network->address_labels, label);
	32	assert(label->network->n_address_labels > 0);
	33	label->network->n_address_labels--;
	34
	35	if (label->section) {
	36	hashmap_remove(label->network->address_labels_by_section, label->section);
	37	network_config_section_free(label->section);
	38	}
	39	}
	40
	41	free(label);
	42	}
	43
	44	static int address_label_new_static(Network network, const char filename, unsigned section_line, AddressLabel **ret) {
8e766630 LP	45	_cleanup_(network_config_section_freep) NetworkConfigSection *n = NULL;
8e766630 LP	46	_cleanup_(address_label_freep) AddressLabel *label = NULL;
95b74ef6 SS	47	int r;
	48
	49	assert(network);
	50	assert(ret);
	51	assert(!!filename == (section_line > 0));
	52
	53	r = network_config_section_new(filename, section_line, &n);
	54	if (r < 0)
	55	return r;
	56
	57	label = hashmap_get(network->address_labels_by_section, n);
	58	if (label) {
1cc6c93a	59	*ret = TAKE_PTR(label);
95b74ef6 SS	60
	61	return 0;
	62	}
	63
	64	r = address_label_new(&label);
	65	if (r < 0)
	66	return r;
	67
1cc6c93a	68	label->section = TAKE_PTR(n);
95b74ef6 SS	69
	70	r = hashmap_put(network->address_labels_by_section, label->section, label);
	71	if (r < 0)
	72	return r;
	73
	74	label->network = network;
	75	LIST_APPEND(labels, network->address_labels, label);
	76	network->n_address_labels++;
	77
1cc6c93a	78	*ret = TAKE_PTR(label);
95b74ef6 SS	79
	80	return 0;
	81	}
	82
	83	int address_label_configure(
	84	AddressLabel *label,
	85	Link *link,
	86	sd_netlink_message_handler_t callback,
	87	bool update) {
	88
	89	_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
	90	int r;
	91
	92	assert(label);
	93	assert(link);
	94	assert(link->ifindex > 0);
	95	assert(link->manager);
	96	assert(link->manager->rtnl);
	97
	98	r = sd_rtnl_message_new_addrlabel(link->manager->rtnl, &req, RTM_NEWADDRLABEL,
f7bf1abe	99	link->ifindex, AF_INET6);
95b74ef6 SS	100	if (r < 0)
	101	return log_error_errno(r, "Could not allocate RTM_NEWADDR message: %m");
	102
	103	r = sd_rtnl_message_addrlabel_set_prefixlen(req, label->prefixlen);
	104	if (r < 0)
	105	return log_error_errno(r, "Could not set prefixlen: %m");
	106
	107	r = sd_netlink_message_append_u32(req, IFAL_LABEL, label->label);
	108	if (r < 0)
	109	return log_error_errno(r, "Could not append IFAL_LABEL attribute: %m");
	110
	111	r = sd_netlink_message_append_in6_addr(req, IFA_ADDRESS, &label->in_addr.in6);
	112	if (r < 0)
	113	return log_error_errno(r, "Could not append IFA_ADDRESS attribute: %m");
	114
ee38400b	115	r = sd_netlink_call_async(link->manager->rtnl, NULL, req, callback,
8190a388	116	link_netlink_destroy_callback, link, 0, __func__);
95b74ef6 SS	117	if (r < 0)
	118	return log_error_errno(r, "Could not send rtnetlink message: %m");
	119
	120	link_ref(link);
	121
	122	return 0;
	123	}
	124
	125	int config_parse_address_label_prefix(const char *unit,
	126	const char *filename,
	127	unsigned line,
	128	const char *section,
	129	unsigned section_line,
	130	const char *lvalue,
	131	int ltype,
	132	const char *rvalue,
	133	void *data,
	134	void *userdata) {
	135
8e766630	136	_cleanup_(address_label_freep) AddressLabel *n = NULL;
95b74ef6	137	Network *network = userdata;
f7bf1abe	138	int r;
95b74ef6 SS	139
	140	assert(filename);
	141	assert(section);
	142	assert(lvalue);
	143	assert(rvalue);
	144	assert(data);
	145
	146	r = address_label_new_static(network, filename, section_line, &n);
	147	if (r < 0)
	148	return r;
	149
f7bf1abe	150	r = in_addr_prefix_from_string(rvalue, AF_INET6, &n->in_addr, &n->prefixlen);
95b74ef6	151	if (r < 0) {
f7bf1abe	152	log_syntax(unit, LOG_ERR, filename, line, r, "Address label is invalid, ignoring assignment: %s", rvalue);
95b74ef6 SS	153	return 0;
	154	}
	155
95b74ef6 SS	156	n = NULL;
	157
	158	return 0;
	159	}
	160
	161	int config_parse_address_label(
	162	const char *unit,
	163	const char *filename,
	164	unsigned line,
	165	const char *section,
	166	unsigned section_line,
	167	const char *lvalue,
	168	int ltype,
	169	const char *rvalue,
	170	void *data,
	171	void *userdata) {
	172
8e766630	173	_cleanup_(address_label_freep) AddressLabel *n = NULL;
95b74ef6 SS	174	Network *network = userdata;
	175	uint32_t k;
	176	int r;
	177
	178	assert(filename);
	179	assert(section);
	180	assert(lvalue);
	181	assert(rvalue);
	182	assert(data);
	183
	184	r = address_label_new_static(network, filename, section_line, &n);
	185	if (r < 0)
	186	return r;
	187
	188	r = safe_atou32(rvalue, &k);
	189	if (r < 0) {
	190	log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse address label, ignoring: %s", rvalue);
	191	return 0;
	192	}
	193
	194	if (k == 0xffffffffUL) {
3fe91079	195	log_syntax(unit, LOG_ERR, filename, line, r, "Address label is invalid, ignoring: %s", rvalue);
95b74ef6 SS	196	return 0;
	197	}
	198
	199	n->label = k;
	200	n = NULL;
	201
	202	return 0;
	203	}