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/* SPDX-License-Identifier: LGPL-2.1+ */
#include "condition.h"
#include "conf-parser.h"
#include "networkd-util.h"
#include "parse-util.h"
#include "string-table.h"
#include "string-util.h"
#include "util.h"
static const char * const address_family_boolean_table[_ADDRESS_FAMILY_BOOLEAN_MAX] = {
[ADDRESS_FAMILY_NO] = "no",
[ADDRESS_FAMILY_YES] = "yes",
[ADDRESS_FAMILY_IPV4] = "ipv4",
[ADDRESS_FAMILY_IPV6] = "ipv6",
};
static const char * const link_local_address_family_boolean_table[_ADDRESS_FAMILY_BOOLEAN_MAX] = {
[ADDRESS_FAMILY_NO] = "no",
[ADDRESS_FAMILY_YES] = "yes",
[ADDRESS_FAMILY_IPV4] = "ipv4",
[ADDRESS_FAMILY_IPV6] = "ipv6",
[ADDRESS_FAMILY_FALLBACK] = "fallback",
[ADDRESS_FAMILY_FALLBACK_IPV4] = "ipv4-fallback",
};
DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(address_family_boolean, AddressFamilyBoolean, ADDRESS_FAMILY_YES);
DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(link_local_address_family_boolean, AddressFamilyBoolean, ADDRESS_FAMILY_YES);
DEFINE_CONFIG_PARSE_ENUM(config_parse_link_local_address_family_boolean, link_local_address_family_boolean,
AddressFamilyBoolean, "Failed to parse option");
int config_parse_address_family_boolean_with_kernel(
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) {
AddressFamilyBoolean *fwd = data, s;
assert(filename);
assert(lvalue);
assert(rvalue);
assert(data);
/* This function is mostly obsolete now. It simply redirects
* "kernel" to "no". In older networkd versions we used to
* distinguish IPForward=off from IPForward=kernel, where the
* former would explicitly turn off forwarding while the
* latter would simply not touch the setting. But that logic
* is gone, hence silently accept the old setting, but turn it
* to "no". */
s = address_family_boolean_from_string(rvalue);
if (s < 0) {
if (streq(rvalue, "kernel"))
s = ADDRESS_FAMILY_NO;
else {
log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse IPForward= option, ignoring: %s", rvalue);
return 0;
}
}
*fwd = s;
return 0;
}
/* Router lifetime can be set with netlink interface since kernel >= 4.5
* so for the supported kernel we don't need to expire routes in userspace */
int kernel_route_expiration_supported(void) {
static int cached = -1;
int r;
if (cached < 0) {
Condition c = {
.type = CONDITION_KERNEL_VERSION,
.parameter = (char *) ">= 4.5"
};
r = condition_test(&c);
if (r < 0)
return r;
cached = r;
}
return cached;
}
static void network_config_hash_func(const NetworkConfigSection *c, struct siphash *state) {
siphash24_compress(c->filename, strlen(c->filename), state);
siphash24_compress(&c->line, sizeof(c->line), state);
}
static int network_config_compare_func(const NetworkConfigSection *x, const NetworkConfigSection *y) {
int r;
r = strcmp(x->filename, y->filename);
if (r != 0)
return r;
return CMP(x->line, y->line);
}
DEFINE_HASH_OPS(network_config_hash_ops, NetworkConfigSection, network_config_hash_func, network_config_compare_func);
int network_config_section_new(const char *filename, unsigned line, NetworkConfigSection **s) {
NetworkConfigSection *cs;
cs = malloc0(offsetof(NetworkConfigSection, filename) + strlen(filename) + 1);
if (!cs)
return -ENOMEM;
strcpy(cs->filename, filename);
cs->line = line;
*s = TAKE_PTR(cs);
return 0;
}
void network_config_section_free(NetworkConfigSection *cs) {
free(cs);
}
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