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networkd-util.c
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258 lines (216 loc) · 9.06 KB
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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include "condition.h"
#include "conf-parser.h"
#include "escape.h"
#include "networkd-link.h"
#include "networkd-util.h"
#include "parse-util.h"
#include "string-table.h"
#include "string-util.h"
#include "web-util.h"
/* This is used in log messages, and never used in parsing settings. So, upper cases are OK. */
static const char * const network_config_source_table[_NETWORK_CONFIG_SOURCE_MAX] = {
[NETWORK_CONFIG_SOURCE_FOREIGN] = "foreign",
[NETWORK_CONFIG_SOURCE_STATIC] = "static",
[NETWORK_CONFIG_SOURCE_IPV4LL] = "IPv4LL",
[NETWORK_CONFIG_SOURCE_DHCP4] = "DHCPv4",
[NETWORK_CONFIG_SOURCE_DHCP6] = "DHCPv6",
[NETWORK_CONFIG_SOURCE_DHCP_PD] = "DHCP-PD",
[NETWORK_CONFIG_SOURCE_NDISC] = "NDisc",
[NETWORK_CONFIG_SOURCE_RUNTIME] = "runtime",
};
DEFINE_STRING_TABLE_LOOKUP_TO_STRING(network_config_source, NetworkConfigSource);
int network_config_state_to_string_alloc(NetworkConfigState s, char **ret) {
static const char* states[] = {
[LOG2U(NETWORK_CONFIG_STATE_PROBING)] = "probing",
[LOG2U(NETWORK_CONFIG_STATE_REQUESTING)] = "requesting",
[LOG2U(NETWORK_CONFIG_STATE_CONFIGURING)] = "configuring",
[LOG2U(NETWORK_CONFIG_STATE_CONFIGURED)] = "configured",
[LOG2U(NETWORK_CONFIG_STATE_MARKED)] = "marked",
[LOG2U(NETWORK_CONFIG_STATE_REMOVING)] = "removing",
};
_cleanup_free_ char *buf = NULL;
assert(ret);
for (size_t i = 0; i < ELEMENTSOF(states); i++)
if (FLAGS_SET(s, 1 << i)) {
assert(states[i]);
if (!strextend_with_separator(&buf, ",", states[i]))
return -ENOMEM;
}
*ret = TAKE_PTR(buf);
return 0;
}
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;
}
int config_parse_mud_url(
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_free_ char *unescaped = NULL;
char **url = data;
ssize_t l;
assert(filename);
assert(lvalue);
assert(rvalue);
assert(url);
if (isempty(rvalue)) {
*url = mfree(*url);
return 0;
}
l = cunescape(rvalue, 0, &unescaped);
if (l < 0) {
log_syntax(unit, LOG_WARNING, filename, line, l,
"Failed to unescape MUD URL, ignoring: %s", rvalue);
return 0;
}
if (l > UINT8_MAX || !http_url_is_valid(unescaped)) {
log_syntax(unit, LOG_WARNING, filename, line, 0,
"Invalid MUD URL, ignoring: %s", rvalue);
return 0;
}
return free_and_replace(*url, unescaped);
}
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 ? " " : "");
}