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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include "condition.h"
#include "conf-parser.h"
#include "networkd-link.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_table[_ADDRESS_FAMILY_MAX] = {
[ADDRESS_FAMILY_NO] = "no",
[ADDRESS_FAMILY_YES] = "yes",
[ADDRESS_FAMILY_IPV4] = "ipv4",
[ADDRESS_FAMILY_IPV6] = "ipv6",
};
static const char* const routing_policy_rule_address_family_table[_ADDRESS_FAMILY_MAX] = {
[ADDRESS_FAMILY_YES] = "both",
[ADDRESS_FAMILY_IPV4] = "ipv4",
[ADDRESS_FAMILY_IPV6] = "ipv6",
};
static const char* const nexthop_address_family_table[_ADDRESS_FAMILY_MAX] = {
[ADDRESS_FAMILY_IPV4] = "ipv4",
[ADDRESS_FAMILY_IPV6] = "ipv6",
};
static const char* const duplicate_address_detection_address_family_table[_ADDRESS_FAMILY_MAX] = {
[ADDRESS_FAMILY_NO] = "none",
[ADDRESS_FAMILY_YES] = "both",
[ADDRESS_FAMILY_IPV4] = "ipv4",
[ADDRESS_FAMILY_IPV6] = "ipv6",
};
static const char* const dhcp_deprecated_address_family_table[_ADDRESS_FAMILY_MAX] = {
[ADDRESS_FAMILY_NO] = "none",
[ADDRESS_FAMILY_YES] = "both",
[ADDRESS_FAMILY_IPV4] = "v4",
[ADDRESS_FAMILY_IPV6] = "v6",
};
static const char* const ip_masquerade_address_family_table[_ADDRESS_FAMILY_MAX] = {
[ADDRESS_FAMILY_NO] = "no",
[ADDRESS_FAMILY_YES] = "both",
[ADDRESS_FAMILY_IPV4] = "ipv4",
[ADDRESS_FAMILY_IPV6] = "ipv6",
};
static const char* const dhcp_lease_server_type_table[_SD_DHCP_LEASE_SERVER_TYPE_MAX] = {
[SD_DHCP_LEASE_DNS] = "DNS servers",
[SD_DHCP_LEASE_NTP] = "NTP servers",
[SD_DHCP_LEASE_SIP] = "SIP servers",
[SD_DHCP_LEASE_POP3] = "POP3 servers",
[SD_DHCP_LEASE_SMTP] = "SMTP servers",
[SD_DHCP_LEASE_LPR] = "LPR servers",
};
DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(address_family, AddressFamily, ADDRESS_FAMILY_YES);
AddressFamily link_local_address_family_from_string(const char *s) {
if (streq_ptr(s, "fallback")) /* compat name */
return ADDRESS_FAMILY_YES;
if (streq_ptr(s, "fallback-ipv4")) /* compat name */
return ADDRESS_FAMILY_IPV4;
return address_family_from_string(s);
}
DEFINE_STRING_TABLE_LOOKUP(routing_policy_rule_address_family, AddressFamily);
DEFINE_STRING_TABLE_LOOKUP(nexthop_address_family, AddressFamily);
DEFINE_STRING_TABLE_LOOKUP(duplicate_address_detection_address_family, AddressFamily);
DEFINE_CONFIG_PARSE_ENUM(config_parse_link_local_address_family, link_local_address_family,
AddressFamily, "Failed to parse option");
DEFINE_STRING_TABLE_LOOKUP_FROM_STRING(dhcp_deprecated_address_family, AddressFamily);
DEFINE_PRIVATE_STRING_TABLE_LOOKUP_FROM_STRING(ip_masquerade_address_family, AddressFamily);
DEFINE_STRING_TABLE_LOOKUP(dhcp_lease_server_type, sd_dhcp_lease_server_type_t);
int config_parse_address_family_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) {
AddressFamily *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_from_string(rvalue);
if (s < 0) {
if (streq(rvalue, "kernel"))
s = ADDRESS_FAMILY_NO;
else {
log_syntax(unit, LOG_WARNING, filename, line, 0, "Failed to parse IPForward= option, ignoring: %s", rvalue);
return 0;
}
}
*fwd = s;
return 0;
}
int config_parse_ip_masquerade(
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) {
AddressFamily a, *ret = data;
int r;
if (isempty(rvalue)) {
*ret = ADDRESS_FAMILY_NO;
return 0;
}
r = parse_boolean(rvalue);
if (r >= 0) {
if (r)
log_syntax(unit, LOG_WARNING, filename, line, 0,
"IPMasquerade=%s is deprecated, and it is handled as \"ipv4\" instead of \"both\". "
"Please use \"ipv4\" or \"both\".",
rvalue);
*ret = r ? ADDRESS_FAMILY_IPV4 : ADDRESS_FAMILY_NO;
return 0;
}
a = ip_masquerade_address_family_from_string(rvalue);
if (a < 0) {
log_syntax(unit, LOG_WARNING, filename, line, a,
"Failed to parse IPMasquerade= setting, ignoring assignment: %s", rvalue);
return 0;
}
*ret = a;
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, NULL);
if (r < 0)
return r;
cached = r;
}
return cached;
}
static void network_config_hash_func(const NetworkConfigSection *c, struct siphash *state) {
siphash24_compress_string(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;
}
unsigned hashmap_find_free_section_line(Hashmap *hashmap) {
NetworkConfigSection *cs;
unsigned n = 0;
void *entry;
HASHMAP_FOREACH_KEY(entry, cs, hashmap)
if (n < cs->line)
n = cs->line;
return n + 1;
}
int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) {
const char *err_msg = NULL;
/* link may be NULL. */
(void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
return log_link_full_errno(link, level, err,
"%s: %s%s%s%m",
msg,
strempty(err_msg),
err_msg && !endswith(err_msg, ".") ? "." : "",
err_msg ? " " : "");
}
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