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

/* SPDX-License-Identifier: LGPL-2.1+ */
/***
  This file is part of systemd.

  Copyright 2017 Susant Sahani
***/

#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_free_ 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_free_ NetworkConfigSection *n = NULL;
        _cleanup_address_label_free_ 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, req, callback, link, 0, NULL);
        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_free_ 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_free_ 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, "Adress 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	This file is part of systemd.
	4
	5	Copyright 2017 Susant Sahani
95b74ef6 SS	6	***/
	7
	8	#include <net/if.h>
	9	#include <linux/if_addrlabel.h>
	10
	11	#include "alloc-util.h"
	12	#include "conf-parser.h"
	13	#include "networkd-address-label.h"
	14	#include "netlink-util.h"
	15	#include "networkd-manager.h"
	16	#include "parse-util.h"
	17	#include "socket-util.h"
	18
	19	int address_label_new(AddressLabel **ret) {
	20	_cleanup_address_label_free_ AddressLabel *addrlabel = NULL;
	21
	22	addrlabel = new0(AddressLabel, 1);
	23	if (!addrlabel)
	24	return -ENOMEM;
	25
1cc6c93a	26	*ret = TAKE_PTR(addrlabel);
95b74ef6 SS	27
	28	return 0;
	29	}
	30
	31	void address_label_free(AddressLabel *label) {
	32	if (!label)
	33	return;
	34
	35	if (label->network) {
	36	LIST_REMOVE(labels, label->network->address_labels, label);
	37	assert(label->network->n_address_labels > 0);
	38	label->network->n_address_labels--;
	39
	40	if (label->section) {
	41	hashmap_remove(label->network->address_labels_by_section, label->section);
	42	network_config_section_free(label->section);
	43	}
	44	}
	45
	46	free(label);
	47	}
	48
	49	static int address_label_new_static(Network network, const char filename, unsigned section_line, AddressLabel **ret) {
	50	_cleanup_network_config_section_free_ NetworkConfigSection *n = NULL;
	51	_cleanup_address_label_free_ AddressLabel *label = NULL;
	52	int r;
	53
	54	assert(network);
	55	assert(ret);
	56	assert(!!filename == (section_line > 0));
	57
	58	r = network_config_section_new(filename, section_line, &n);
	59	if (r < 0)
	60	return r;
	61
	62	label = hashmap_get(network->address_labels_by_section, n);
	63	if (label) {
1cc6c93a	64	*ret = TAKE_PTR(label);
95b74ef6 SS	65
	66	return 0;
	67	}
	68
	69	r = address_label_new(&label);
	70	if (r < 0)
	71	return r;
	72
1cc6c93a	73	label->section = TAKE_PTR(n);
95b74ef6 SS	74
	75	r = hashmap_put(network->address_labels_by_section, label->section, label);
	76	if (r < 0)
	77	return r;
	78
	79	label->network = network;
	80	LIST_APPEND(labels, network->address_labels, label);
	81	network->n_address_labels++;
	82
1cc6c93a	83	*ret = TAKE_PTR(label);
95b74ef6 SS	84
	85	return 0;
	86	}
	87
	88	int address_label_configure(
	89	AddressLabel *label,
	90	Link *link,
	91	sd_netlink_message_handler_t callback,
	92	bool update) {
	93
	94	_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
	95	int r;
	96
	97	assert(label);
	98	assert(link);
	99	assert(link->ifindex > 0);
	100	assert(link->manager);
	101	assert(link->manager->rtnl);
	102
	103	r = sd_rtnl_message_new_addrlabel(link->manager->rtnl, &req, RTM_NEWADDRLABEL,
f7bf1abe	104	link->ifindex, AF_INET6);
95b74ef6 SS	105	if (r < 0)
	106	return log_error_errno(r, "Could not allocate RTM_NEWADDR message: %m");
	107
	108	r = sd_rtnl_message_addrlabel_set_prefixlen(req, label->prefixlen);
	109	if (r < 0)
	110	return log_error_errno(r, "Could not set prefixlen: %m");
	111
	112	r = sd_netlink_message_append_u32(req, IFAL_LABEL, label->label);
	113	if (r < 0)
	114	return log_error_errno(r, "Could not append IFAL_LABEL attribute: %m");
	115
	116	r = sd_netlink_message_append_in6_addr(req, IFA_ADDRESS, &label->in_addr.in6);
	117	if (r < 0)
	118	return log_error_errno(r, "Could not append IFA_ADDRESS attribute: %m");
	119
	120	r = sd_netlink_call_async(link->manager->rtnl, req, callback, link, 0, NULL);
	121	if (r < 0)
	122	return log_error_errno(r, "Could not send rtnetlink message: %m");
	123
	124	link_ref(link);
	125
	126	return 0;
	127	}
	128
	129	int config_parse_address_label_prefix(const char *unit,
	130	const char *filename,
	131	unsigned line,
	132	const char *section,
	133	unsigned section_line,
	134	const char *lvalue,
	135	int ltype,
	136	const char *rvalue,
	137	void *data,
	138	void *userdata) {
	139
	140	_cleanup_address_label_free_ AddressLabel *n = NULL;
	141	Network *network = userdata;
f7bf1abe	142	int r;
95b74ef6 SS	143
	144	assert(filename);
	145	assert(section);
	146	assert(lvalue);
	147	assert(rvalue);
	148	assert(data);
	149
	150	r = address_label_new_static(network, filename, section_line, &n);
	151	if (r < 0)
	152	return r;
	153
f7bf1abe	154	r = in_addr_prefix_from_string(rvalue, AF_INET6, &n->in_addr, &n->prefixlen);
95b74ef6	155	if (r < 0) {
f7bf1abe	156	log_syntax(unit, LOG_ERR, filename, line, r, "Address label is invalid, ignoring assignment: %s", rvalue);
95b74ef6 SS	157	return 0;
	158	}
	159
95b74ef6 SS	160	n = NULL;
	161
	162	return 0;
	163	}
	164
	165	int config_parse_address_label(
	166	const char *unit,
	167	const char *filename,
	168	unsigned line,
	169	const char *section,
	170	unsigned section_line,
	171	const char *lvalue,
	172	int ltype,
	173	const char *rvalue,
	174	void *data,
	175	void *userdata) {
	176
	177	_cleanup_address_label_free_ AddressLabel *n = NULL;
	178	Network *network = userdata;
	179	uint32_t k;
	180	int r;
	181
	182	assert(filename);
	183	assert(section);
	184	assert(lvalue);
	185	assert(rvalue);
	186	assert(data);
	187
	188	r = address_label_new_static(network, filename, section_line, &n);
	189	if (r < 0)
	190	return r;
	191
	192	r = safe_atou32(rvalue, &k);
	193	if (r < 0) {
	194	log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse address label, ignoring: %s", rvalue);
	195	return 0;
	196	}
	197
	198	if (k == 0xffffffffUL) {
	199	log_syntax(unit, LOG_ERR, filename, line, r, "Adress label is invalid, ignoring: %s", rvalue);
	200	return 0;
	201	}
	202
	203	n->label = k;
	204	n = NULL;
	205
	206	return 0;
	207	}