Adding upstream version 255.4.upstream/255.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1984 insertions, 0 deletions

diff --git a/src/shared/conf-parser.c b/src/shared/conf-parser.c
new file mode 100644
index 0000000..e8ecd9b
--- /dev/null
+++ b/src/shared/conf-parser.c
@@ -0,0 +1,1984 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <errno.h>
+#include <limits.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+
+#include "alloc-util.h"
+#include "conf-files.h"
+#include "conf-parser.h"
+#include "constants.h"
+#include "dns-domain.h"
+#include "escape.h"
+#include "ether-addr-util.h"
+#include "extract-word.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "fs-util.h"
+#include "hash-funcs.h"
+#include "hostname-util.h"
+#include "id128-util.h"
+#include "in-addr-util.h"
+#include "log.h"
+#include "macro.h"
+#include "missing_network.h"
+#include "nulstr-util.h"
+#include "parse-helpers.h"
+#include "parse-util.h"
+#include "path-util.h"
+#include "percent-util.h"
+#include "process-util.h"
+#include "rlimit-util.h"
+#include "sd-id128.h"
+#include "set.h"
+#include "signal-util.h"
+#include "socket-util.h"
+#include "stat-util.h"
+#include "string-util.h"
+#include "strv.h"
+#include "syslog-util.h"
+#include "time-util.h"
+#include "utf8.h"
+
+DEFINE_PRIVATE_HASH_OPS_WITH_VALUE_DESTRUCTOR(config_file_hash_ops_fclose,
+                                              char, path_hash_func, path_compare,
+                                              FILE, safe_fclose);
+
+int config_item_table_lookup(
+                const void *table,
+                const char *section,
+                const char *lvalue,
+                ConfigParserCallback *ret_func,
+                int *ret_ltype,
+                void **ret_data,
+                void *userdata) {
+
+        assert(table);
+        assert(lvalue);
+        assert(ret_func);
+        assert(ret_ltype);
+        assert(ret_data);
+
+        for (const ConfigTableItem *t = table; t->lvalue; t++) {
+
+                if (!streq(lvalue, t->lvalue))
+                        continue;
+
+                if (!streq_ptr(section, t->section))
+                        continue;
+
+                *ret_func = t->parse;
+                *ret_ltype = t->ltype;
+                *ret_data = t->data;
+                return 1;
+        }
+
+        *ret_func = NULL;
+        *ret_ltype = 0;
+        *ret_data = NULL;
+        return 0;
+}
+
+int config_item_perf_lookup(
+                const void *table,
+                const char *section,
+                const char *lvalue,
+                ConfigParserCallback *ret_func,
+                int *ret_ltype,
+                void **ret_data,
+                void *userdata) {
+
+        ConfigPerfItemLookup lookup = (ConfigPerfItemLookup) table;
+        const ConfigPerfItem *p;
+
+        assert(table);
+        assert(lvalue);
+        assert(ret_func);
+        assert(ret_ltype);
+        assert(ret_data);
+
+        if (section) {
+                const char *key;
+
+                key = strjoina(section, ".", lvalue);
+                p = lookup(key, strlen(key));
+        } else
+                p = lookup(lvalue, strlen(lvalue));
+        if (!p) {
+                *ret_func = NULL;
+                *ret_ltype = 0;
+                *ret_data = NULL;
+                return 0;
+        }
+
+        *ret_func = p->parse;
+        *ret_ltype = p->ltype;
+        *ret_data = (uint8_t*) userdata + p->offset;
+        return 1;
+}
+
+/* Run the user supplied parser for an assignment */
+static int next_assignment(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                ConfigItemLookup lookup,
+                const void *table,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                const char *rvalue,
+                ConfigParseFlags flags,
+                void *userdata) {
+
+        ConfigParserCallback func = NULL;
+        int ltype = 0;
+        void *data = NULL;
+        int r;
+
+        assert(filename);
+        assert(line > 0);
+        assert(lookup);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = lookup(table, section, lvalue, &func, &ltype, &data, userdata);
+        if (r < 0)
+                return r;
+        if (r > 0) {
+                if (!func)
+                        return 0;
+
+                return func(unit, filename, line, section, section_line,
+                            lvalue, ltype, rvalue, data, userdata);
+        }
+
+        /* Warn about unknown non-extension fields. */
+        if (!(flags & CONFIG_PARSE_RELAXED) && !startswith(lvalue, "X-"))
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Unknown key name '%s' in section '%s', ignoring.", lvalue, section);
+
+        return 0;
+}
+
+/* Parse a single logical line */
+static int parse_line(
+                const char* unit,
+                const char *filename,
+                unsigned line,
+                const char *sections,
+                ConfigItemLookup lookup,
+                const void *table,
+                ConfigParseFlags flags,
+                char **section,
+                unsigned *section_line,
+                bool *section_ignored,
+                char *l, /* is modified */
+                void *userdata) {
+
+        char *e;
+
+        assert(filename);
+        assert(line > 0);
+        assert(lookup);
+        assert(l);
+
+        l = strstrip(l);
+        if (isempty(l))
+                return 0;
+
+        if (l[0] == '\n')
+                return 0;
+
+        if (!utf8_is_valid(l))
+                return log_syntax_invalid_utf8(unit, LOG_WARNING, filename, line, l);
+
+        if (l[0] == '[') {
+                _cleanup_free_ char *n = NULL;
+                size_t k;
+
+                k = strlen(l);
+                assert(k > 0);
+
+                if (l[k-1] != ']')
+                        return log_syntax(unit, LOG_ERR, filename, line, SYNTHETIC_ERRNO(EBADMSG), "Invalid section header '%s'", l);
+
+                n = strndup(l+1, k-2);
+                if (!n)
+                        return log_oom();
+
+                if (!string_is_safe(n))
+                        return log_syntax(unit, LOG_ERR, filename, line, SYNTHETIC_ERRNO(EBADMSG), "Bad characters in section header '%s'", l);
+
+                if (sections && !nulstr_contains(sections, n)) {
+                        bool ignore;
+
+                        ignore = (flags & CONFIG_PARSE_RELAXED) || startswith(n, "X-");
+
+                        if (!ignore)
+                                NULSTR_FOREACH(t, sections)
+                                        if (streq_ptr(n, startswith(t, "-"))) { /* Ignore sections prefixed with "-" in valid section list */
+                                                ignore = true;
+                                                break;
+                                        }
+
+                        if (!ignore)
+                                log_syntax(unit, LOG_WARNING, filename, line, 0, "Unknown section '%s'. Ignoring.", n);
+
+                        *section = mfree(*section);
+                        *section_line = 0;
+                        *section_ignored = true;
+                } else {
+                        free_and_replace(*section, n);
+                        *section_line = line;
+                        *section_ignored = false;
+                }
+
+                return 0;
+        }
+
+        if (sections && !*section) {
+                if (!(flags & CONFIG_PARSE_RELAXED) && !*section_ignored)
+                        log_syntax(unit, LOG_WARNING, filename, line, 0, "Assignment outside of section. Ignoring.");
+
+                return 0;
+        }
+
+        e = strchr(l, '=');
+        if (!e)
+                return log_syntax(unit, LOG_WARNING, filename, line, 0,
+                                  "Missing '=', ignoring line.");
+        if (e == l)
+                return log_syntax(unit, LOG_WARNING, filename, line, 0,
+                                  "Missing key name before '=', ignoring line.");
+
+        *e = 0;
+        e++;
+
+        return next_assignment(unit,
+                               filename,
+                               line,
+                               lookup,
+                               table,
+                               *section,
+                               *section_line,
+                               strstrip(l),
+                               strstrip(e),
+                               flags,
+                               userdata);
+}
+
+/* Go through the file and parse each line */
+int config_parse(
+                const char *unit,
+                const char *filename,
+                FILE *f,
+                const char *sections,
+                ConfigItemLookup lookup,
+                const void *table,
+                ConfigParseFlags flags,
+                void *userdata,
+                struct stat *ret_stat) {
+
+        _cleanup_free_ char *section = NULL, *continuation = NULL;
+        _cleanup_fclose_ FILE *ours = NULL;
+        unsigned line = 0, section_line = 0;
+        bool section_ignored = false, bom_seen = false;
+        struct stat st;
+        int r, fd;
+
+        assert(filename);
+        assert(lookup);
+
+        if (!f) {
+                f = ours = fopen(filename, "re");
+                if (!f) {
+                        /* Only log on request, except for ENOENT,
+                         * since we return 0 to the caller. */
+                        if ((flags & CONFIG_PARSE_WARN) || errno == ENOENT)
+                                log_full_errno(errno == ENOENT ? LOG_DEBUG : LOG_ERR, errno,
+                                               "Failed to open configuration file '%s': %m", filename);
+
+                        if (errno == ENOENT) {
+                                if (ret_stat)
+                                        *ret_stat = (struct stat) {};
+
+                                return 0;
+                        }
+
+                        return -errno;
+                }
+        }
+
+        fd = fileno(f);
+        if (fd >= 0) { /* stream might not have an fd, let's be careful hence */
+
+                if (fstat(fd, &st) < 0)
+                        return log_full_errno(FLAGS_SET(flags, CONFIG_PARSE_WARN) ? LOG_ERR : LOG_DEBUG, errno,
+                                              "Failed to fstat(%s): %m", filename);
+
+                (void) stat_warn_permissions(filename, &st);
+        } else
+                st = (struct stat) {};
+
+        for (;;) {
+                _cleanup_free_ char *buf = NULL;
+                bool escaped = false;
+                char *l, *p, *e;
+
+                r = read_line(f, LONG_LINE_MAX, &buf);
+                if (r == 0)
+                        break;
+                if (r == -ENOBUFS) {
+                        if (flags & CONFIG_PARSE_WARN)
+                                log_error_errno(r, "%s:%u: Line too long", filename, line);
+
+                        return r;
+                }
+                if (r < 0) {
+                        if (FLAGS_SET(flags, CONFIG_PARSE_WARN))
+                                log_error_errno(r, "%s:%u: Error while reading configuration file: %m", filename, line);
+
+                        return r;
+                }
+
+                line++;
+
+                l = skip_leading_chars(buf, WHITESPACE);
+                if (*l != '\0' && strchr(COMMENTS, *l))
+                        continue;
+
+                l = buf;
+                if (!bom_seen) {
+                        char *q;
+
+                        q = startswith(buf, UTF8_BYTE_ORDER_MARK);
+                        if (q) {
+                                l = q;
+                                bom_seen = true;
+                        }
+                }
+
+                if (continuation) {
+                        if (strlen(continuation) + strlen(l) > LONG_LINE_MAX) {
+                                if (flags & CONFIG_PARSE_WARN)
+                                        log_error("%s:%u: Continuation line too long", filename, line);
+                                return -ENOBUFS;
+                        }
+
+                        if (!strextend(&continuation, l)) {
+                                if (flags & CONFIG_PARSE_WARN)
+                                        log_oom();
+                                return -ENOMEM;
+                        }
+
+                        p = continuation;
+                } else
+                        p = l;
+
+                for (e = p; *e; e++) {
+                        if (escaped)
+                                escaped = false;
+                        else if (*e == '\\')
+                                escaped = true;
+                }
+
+                if (escaped) {
+                        *(e-1) = ' ';
+
+                        if (!continuation) {
+                                continuation = strdup(l);
+                                if (!continuation) {
+                                        if (flags & CONFIG_PARSE_WARN)
+                                                log_oom();
+                                        return -ENOMEM;
+                                }
+                        }
+
+                        continue;
+                }
+
+                r = parse_line(unit,
+                               filename,
+                               line,
+                               sections,
+                               lookup,
+                               table,
+                               flags,
+                               &section,
+                               &section_line,
+                               &section_ignored,
+                               p,
+                               userdata);
+                if (r < 0) {
+                        if (flags & CONFIG_PARSE_WARN)
+                                log_warning_errno(r, "%s:%u: Failed to parse file: %m", filename, line);
+                        return r;
+                }
+
+                continuation = mfree(continuation);
+        }
+
+        if (continuation) {
+                r = parse_line(unit,
+                               filename,
+                               ++line,
+                               sections,
+                               lookup,
+                               table,
+                               flags,
+                               &section,
+                               &section_line,
+                               &section_ignored,
+                               continuation,
+                               userdata);
+                if (r < 0) {
+                        if (flags & CONFIG_PARSE_WARN)
+                                log_warning_errno(r, "%s:%u: Failed to parse file: %m", filename, line);
+                        return r;
+                }
+        }
+
+        if (ret_stat)
+                *ret_stat = st;
+
+        return 1;
+}
+
+int hashmap_put_stats_by_path(Hashmap **stats_by_path, const char *path, const struct stat *st) {
+        _cleanup_free_ struct stat *st_copy = NULL;
+        _cleanup_free_ char *path_copy = NULL;
+        int r;
+
+        assert(stats_by_path);
+        assert(path);
+        assert(st);
+
+        r = hashmap_ensure_allocated(stats_by_path, &path_hash_ops_free_free);
+        if (r < 0)
+                return r;
+
+        st_copy = newdup(struct stat, st, 1);
+        if (!st_copy)
+                return -ENOMEM;
+
+        path_copy = strdup(path);
+        if (!path_copy)
+                return -ENOMEM;
+
+        r = hashmap_put(*stats_by_path, path_copy, st_copy);
+        if (r < 0)
+                return r;
+
+        assert(r > 0);
+        TAKE_PTR(path_copy);
+        TAKE_PTR(st_copy);
+        return 0;
+}
+
+static int config_parse_many_files(
+                const char* const* conf_files,
+                char **files,
+                const char *sections,
+                ConfigItemLookup lookup,
+                const void *table,
+                ConfigParseFlags flags,
+                void *userdata,
+                Hashmap **ret_stats_by_path) {
+
+        _cleanup_hashmap_free_ Hashmap *stats_by_path = NULL;
+        _cleanup_ordered_hashmap_free_ OrderedHashmap *dropins = NULL;
+        _cleanup_set_free_ Set *inodes = NULL;
+        struct stat st;
+        int r;
+
+        if (ret_stats_by_path) {
+                stats_by_path = hashmap_new(&path_hash_ops_free_free);
+                if (!stats_by_path)
+                        return -ENOMEM;
+        }
+
+        STRV_FOREACH(fn, files) {
+                _cleanup_free_ struct stat *st_dropin = NULL;
+                _cleanup_fclose_ FILE *f = NULL;
+                int fd;
+
+                f = fopen(*fn, "re");
+                if (!f) {
+                        if (errno == ENOENT)
+                                continue;
+
+                        return -errno;
+                }
+
+                fd = fileno(f);
+
+                r = ordered_hashmap_ensure_put(&dropins, &config_file_hash_ops_fclose, *fn, f);
+                if (r < 0) {
+                        assert(r != -EEXIST);
+                        return r;
+                }
+                assert(r > 0);
+                TAKE_PTR(f);
+
+                /* Get inodes for all drop-ins. Later we'll verify if main config is a symlink to or is
+                 * symlinked as one of them. If so, we skip reading main config file directly. */
+
+                st_dropin = new(struct stat, 1);
+                if (!st_dropin)
+                        return -ENOMEM;
+
+                if (fstat(fd, st_dropin) < 0)
+                        return -errno;
+
+                r = set_ensure_consume(&inodes, &inode_hash_ops, TAKE_PTR(st_dropin));
+                if (r < 0)
+                        return r;
+        }
+
+        /* First read the first found main config file. */
+        STRV_FOREACH(fn, conf_files) {
+                _cleanup_fclose_ FILE *f = NULL;
+
+                f = fopen(*fn, "re");
+                if (!f) {
+                        if (errno == ENOENT)
+                                continue;
+
+                        return -errno;
+                }
+
+                if (inodes) {
+                        if (fstat(fileno(f), &st) < 0)
+                                return -errno;
+
+                        if (set_contains(inodes, &st)) {
+                                log_debug("%s: symlink to/symlinked as drop-in, will be read later.", *fn);
+                                break;
+                        }
+                }
+
+                r = config_parse(NULL, *fn, f, sections, lookup, table, flags, userdata, &st);
+                if (r < 0)
+                        return r;
+                assert(r > 0);
+
+                if (ret_stats_by_path) {
+                        r = hashmap_put_stats_by_path(&stats_by_path, *fn, &st);
+                        if (r < 0)
+                                return r;
+                }
+
+                break;
+        }
+
+        /* Then read all the drop-ins. */
+
+        const char *path_dropin;
+        FILE *f_dropin;
+        ORDERED_HASHMAP_FOREACH_KEY(f_dropin, path_dropin, dropins) {
+                r = config_parse(NULL, path_dropin, f_dropin, sections, lookup, table, flags, userdata, &st);
+                if (r < 0)
+                        return r;
+                assert(r > 0);
+
+                if (ret_stats_by_path) {
+                        r = hashmap_put_stats_by_path(&stats_by_path, path_dropin, &st);
+                        if (r < 0)
+                                return r;
+                }
+        }
+
+        if (ret_stats_by_path)
+                *ret_stats_by_path = TAKE_PTR(stats_by_path);
+
+        return 0;
+}
+
+/* Parse one main config file located in /etc/systemd and its drop-ins, which is what all systemd daemons
+ * do. */
+int config_parse_config_file(
+                const char *conf_file,
+                const char *sections,
+                ConfigItemLookup lookup,
+                const void *table,
+                ConfigParseFlags flags,
+                void *userdata) {
+
+        _cleanup_strv_free_ char **dropins = NULL, **dropin_dirs = NULL;
+        char **conf_paths = CONF_PATHS_STRV("");
+        int r;
+
+        assert(conf_file);
+
+        /* build the dropin dir list */
+        dropin_dirs = new0(char*, strv_length(conf_paths) + 1);
+        if (!dropin_dirs) {
+                if (flags & CONFIG_PARSE_WARN)
+                        return log_oom();
+                return -ENOMEM;
+        }
+
+        size_t i = 0;
+        STRV_FOREACH(p, conf_paths) {
+                char *d;
+
+                d = strjoin(*p, "systemd/", conf_file, ".d");
+                if (!d) {
+                        if (flags & CONFIG_PARSE_WARN)
+                                return log_oom();
+                        return -ENOMEM;
+                }
+
+                dropin_dirs[i++] = d;
+        }
+
+        r = conf_files_list_strv(&dropins, ".conf", NULL, 0, (const char**) dropin_dirs);
+        if (r < 0)
+                return r;
+
+        const char *sysconf_file = strjoina(PKGSYSCONFDIR, "/", conf_file);
+
+        return config_parse_many_files(STRV_MAKE_CONST(sysconf_file), dropins,
+                                       sections, lookup, table, flags, userdata, NULL);
+}
+
+/* Parse each config file in the directories specified as strv. */
+int config_parse_many(
+                const char* const* conf_files,
+                const char* const* conf_file_dirs,
+                const char *dropin_dirname,
+                const char *root,
+                const char *sections,
+                ConfigItemLookup lookup,
+                const void *table,
+                ConfigParseFlags flags,
+                void *userdata,
+                Hashmap **ret_stats_by_path,
+                char ***ret_dropin_files) {
+
+        _cleanup_strv_free_ char **files = NULL;
+        int r;
+
+        assert(conf_file_dirs);
+        assert(dropin_dirname);
+        assert(sections);
+        assert(table);
+
+        r = conf_files_list_dropins(&files, dropin_dirname, root, conf_file_dirs);
+        if (r < 0)
+                return r;
+
+        r = config_parse_many_files(conf_files, files, sections, lookup, table, flags, userdata, ret_stats_by_path);
+        if (r < 0)
+                return r;
+
+        if (ret_dropin_files)
+                *ret_dropin_files = TAKE_PTR(files);
+
+        return 0;
+}
+
+static int dropins_get_stats_by_path(
+                const char* conf_file,
+                const char* const* conf_file_dirs,
+                Hashmap **stats_by_path) {
+
+        _cleanup_strv_free_ char **files = NULL;
+        _cleanup_free_ char *dropin_dirname = NULL;
+        int r;
+
+        assert(conf_file);
+        assert(conf_file_dirs);
+        assert(stats_by_path);
+
+        r = path_extract_filename(conf_file, &dropin_dirname);
+        if (r < 0)
+                return r;
+        if (r == O_DIRECTORY)
+                return -EINVAL;
+
+        if (!strextend(&dropin_dirname, ".d"))
+                return -ENOMEM;
+
+        r = conf_files_list_dropins(&files, dropin_dirname, /* root = */ NULL, conf_file_dirs);
+        if (r < 0)
+                return r;
+
+        STRV_FOREACH(fn, files) {
+                struct stat st;
+
+                if (stat(*fn, &st) < 0) {
+                        if (errno == ENOENT)
+                                continue;
+
+                        return -errno;
+                }
+
+                r = hashmap_put_stats_by_path(stats_by_path, *fn, &st);
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}
+
+int config_get_stats_by_path(
+                const char *suffix,
+                const char *root,
+                unsigned flags,
+                const char* const* dirs,
+                bool check_dropins,
+                Hashmap **ret) {
+
+        _cleanup_hashmap_free_ Hashmap *stats_by_path = NULL;
+        _cleanup_strv_free_ char **files = NULL;
+        int r;
+
+        assert(suffix);
+        assert(dirs);
+        assert(ret);
+
+        /* Unlike config_parse(), this does not support stream. */
+
+        r = conf_files_list_strv(&files, suffix, root, flags, dirs);
+        if (r < 0)
+                return r;
+
+        STRV_FOREACH(f, files) {
+                struct stat st;
+
+                /* First read the main config file. */
+                if (stat(*f, &st) < 0) {
+                        if (errno == ENOENT)
+                                continue;
+
+                        return -errno;
+                }
+
+                r = hashmap_put_stats_by_path(&stats_by_path, *f, &st);
+                if (r < 0)
+                        return r;
+
+                if (!check_dropins)
+                        continue;
+
+                /* Then read all the drop-ins if requested. */
+                r = dropins_get_stats_by_path(*f, dirs, &stats_by_path);
+                if (r < 0)
+                        return r;
+        }
+
+        *ret = TAKE_PTR(stats_by_path);
+        return 0;
+}
+
+bool stats_by_path_equal(Hashmap *a, Hashmap *b) {
+        struct stat *st_a, *st_b;
+        const char *path;
+
+        if (hashmap_size(a) != hashmap_size(b))
+                return false;
+
+        HASHMAP_FOREACH_KEY(st_a, path, a) {
+                st_b = hashmap_get(b, path);
+                if (!st_b)
+                        return false;
+
+                if (!stat_inode_unmodified(st_a, st_b))
+                        return false;
+        }
+
+        return true;
+}
+
+static void config_section_hash_func(const ConfigSection *c, struct siphash *state) {
+        siphash24_compress_string(c->filename, state);
+        siphash24_compress(&c->line, sizeof(c->line), state);
+}
+
+static int config_section_compare_func(const ConfigSection *x, const ConfigSection *y) {
+        int r;
+
+        r = strcmp(x->filename, y->filename);
+        if (r != 0)
+                return r;
+
+        return CMP(x->line, y->line);
+}
+
+DEFINE_HASH_OPS(config_section_hash_ops, ConfigSection, config_section_hash_func, config_section_compare_func);
+
+int config_section_new(const char *filename, unsigned line, ConfigSection **ret) {
+        ConfigSection *cs;
+
+        assert(filename);
+        assert(line > 0);
+        assert(ret);
+
+        cs = malloc0(offsetof(ConfigSection, filename) + strlen(filename) + 1);
+        if (!cs)
+                return -ENOMEM;
+
+        strcpy(cs->filename, filename);
+        cs->line = line;
+
+        *ret = TAKE_PTR(cs);
+        return 0;
+}
+
+int _hashmap_by_section_find_unused_line(
+                HashmapBase *entries_by_section,
+                const char *filename,
+                unsigned *ret) {
+
+        ConfigSection *cs;
+        unsigned n = 0;
+        void *entry;
+
+        HASHMAP_BASE_FOREACH_KEY(entry, cs, entries_by_section) {
+                if (filename && !streq(cs->filename, filename))
+                        continue;
+                n = MAX(n, cs->line);
+        }
+
+        /* overflow? */
+        if (n >= UINT_MAX)
+                return -EFBIG;
+
+        *ret = n + 1;
+        return 0;
+}
+
+#define DEFINE_PARSER(type, vartype, conv_func)                         \
+        DEFINE_CONFIG_PARSE_PTR(config_parse_##type, conv_func, vartype, "Failed to parse " #type " value")
+
+DEFINE_PARSER(int, int, safe_atoi);
+DEFINE_PARSER(long, long, safe_atoli);
+DEFINE_PARSER(uint8, uint8_t, safe_atou8);
+DEFINE_PARSER(uint16, uint16_t, safe_atou16);
+DEFINE_PARSER(uint32, uint32_t, safe_atou32);
+DEFINE_PARSER(int32, int32_t, safe_atoi32);
+DEFINE_PARSER(uint64, uint64_t, safe_atou64);
+DEFINE_PARSER(unsigned, unsigned, safe_atou);
+DEFINE_PARSER(double, double, safe_atod);
+DEFINE_PARSER(nsec, nsec_t, parse_nsec);
+DEFINE_PARSER(sec, usec_t, parse_sec);
+DEFINE_PARSER(sec_def_infinity, usec_t, parse_sec_def_infinity);
+DEFINE_PARSER(mode, mode_t, parse_mode);
+DEFINE_PARSER(pid, pid_t, parse_pid);
+
+int config_parse_iec_size(
+                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) {
+
+        size_t *sz = ASSERT_PTR(data);
+        uint64_t v;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = parse_size(rvalue, 1024, &v);
+        if (r >= 0 && (uint64_t) (size_t) v != v)
+                r = -ERANGE;
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse size value '%s', ignoring: %m", rvalue);
+                return 0;
+        }
+
+        *sz = (size_t) v;
+        return 0;
+}
+
+int config_parse_si_uint64(
+                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) {
+
+        uint64_t *sz = ASSERT_PTR(data);
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = parse_size(rvalue, 1000, sz);
+        if (r < 0)
+                log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse size value '%s', ignoring: %m", rvalue);
+
+        return 0;
+}
+
+int config_parse_iec_uint64(
+                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) {
+
+        uint64_t *bytes = ASSERT_PTR(data);
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = parse_size(rvalue, 1024, bytes);
+        if (r < 0)
+                log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue);
+
+        return 0;
+}
+
+int config_parse_iec_uint64_infinity(
+                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) {
+
+        uint64_t *bytes = ASSERT_PTR(data);
+
+        assert(rvalue);
+
+        if (streq(rvalue, "infinity")) {
+                *bytes = UINT64_MAX;
+                return 0;
+        }
+
+        return config_parse_iec_uint64(unit, filename, line, section, section_line, lvalue, ltype, rvalue, data, userdata);
+}
+
+int config_parse_bool(
+                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) {
+
+        int k;
+        bool *b = ASSERT_PTR(data);
+        bool fatal = ltype;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        k = parse_boolean(rvalue);
+        if (k < 0) {
+                log_syntax(unit, fatal ? LOG_ERR : LOG_WARNING, filename, line, k,
+                           "Failed to parse boolean value%s: %s",
+                           fatal ? "" : ", ignoring", rvalue);
+                return fatal ? -ENOEXEC : 0;
+        }
+
+        *b = k;
+        return 0;
+}
+
+int config_parse_id128(
+                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) {
+
+        sd_id128_t *result = data;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = id128_from_string_nonzero(rvalue, result);
+        if (r == -ENXIO)
+                log_syntax(unit, LOG_WARNING, filename, line, r, "128-bit ID/UUID is all 0, ignoring: %s", rvalue);
+        else if (r < 0)
+                log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse 128-bit ID/UUID, ignoring: %s", rvalue);
+
+        return 0;
+}
+
+int config_parse_tristate(
+                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) {
+
+        int r, *t = ASSERT_PTR(data);
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        /* A tristate is pretty much a boolean, except that it can also take an empty string,
+         * indicating "uninitialized", much like NULL is for a pointer type. */
+
+        if (isempty(rvalue)) {
+                *t = -1;
+                return 0;
+        }
+
+        r = parse_tristate(rvalue, t);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse boolean value for %s=, ignoring: %s", lvalue, rvalue);
+                return 0;
+        }
+
+        return 0;
+}
+
+int config_parse_string(
+                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) {
+
+        char **s = ASSERT_PTR(data);
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        if (isempty(rvalue)) {
+                *s = mfree(*s);
+                return 0;
+        }
+
+        if (FLAGS_SET(ltype, CONFIG_PARSE_STRING_SAFE) && !string_is_safe(rvalue)) {
+                _cleanup_free_ char *escaped = NULL;
+
+                escaped = cescape(rvalue);
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Specified string contains unsafe characters, ignoring: %s", strna(escaped));
+                return 0;
+        }
+
+        if (FLAGS_SET(ltype, CONFIG_PARSE_STRING_ASCII) && !ascii_is_valid(rvalue)) {
+                _cleanup_free_ char *escaped = NULL;
+
+                escaped = cescape(rvalue);
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Specified string contains invalid ASCII characters, ignoring: %s", strna(escaped));
+                return 0;
+        }
+
+        return free_and_strdup_warn(s, empty_to_null(rvalue));
+}
+
+int config_parse_dns_name(
+                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) {
+
+        char **hostname = ASSERT_PTR(data);
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        if (isempty(rvalue)) {
+                *hostname = mfree(*hostname);
+                return 0;
+        }
+
+        r = dns_name_is_valid(rvalue);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to check validity of DNS domain name '%s', ignoring assignment: %m", rvalue);
+                return 0;
+        }
+        if (r == 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Specified invalid DNS domain name, ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        return free_and_strdup_warn(hostname, rvalue);
+}
+
+int config_parse_hostname(
+                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) {
+
+        char **hostname = ASSERT_PTR(data);
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        if (isempty(rvalue)) {
+                *hostname = mfree(*hostname);
+                return 0;
+        }
+
+        if (!hostname_is_valid(rvalue, 0)) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Specified invalid hostname, ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        return config_parse_dns_name(unit, filename, line, section, section_line,
+                                     lvalue, ltype, rvalue, data, userdata);
+}
+
+int config_parse_path(
+                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 *n = NULL;
+        bool fatal = ltype;
+        char **s = ASSERT_PTR(data);
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        if (isempty(rvalue))
+                goto finalize;
+
+        n = strdup(rvalue);
+        if (!n)
+                return log_oom();
+
+        r = path_simplify_and_warn(n, PATH_CHECK_ABSOLUTE | (fatal ? PATH_CHECK_FATAL : 0), unit, filename, line, lvalue);
+        if (r < 0)
+                return fatal ? -ENOEXEC : 0;
+
+finalize:
+        return free_and_replace(*s, n);
+}
+
+int config_parse_strv(
+                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) {
+
+        char ***sv = ASSERT_PTR(data);
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        if (isempty(rvalue)) {
+                *sv = strv_free(*sv);
+                return 0;
+        }
+
+        for (const char *p = rvalue;;) {
+                char *word = NULL;
+
+                r = extract_first_word(&p, &word, NULL, EXTRACT_UNQUOTE|EXTRACT_RETAIN_ESCAPE);
+                if (r == 0)
+                        return 0;
+                if (r == -ENOMEM)
+                        return log_oom();
+                if (r < 0) {
+                        log_syntax(unit, LOG_WARNING, filename, line, r, "Invalid syntax, ignoring: %s", rvalue);
+                        return 0;
+                }
+
+                r = strv_consume(sv, word);
+                if (r < 0)
+                        return log_oom();
+        }
+}
+
+int config_parse_warn_compat(
+                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) {
+
+        Disabled reason = ltype;
+
+        switch (reason) {
+
+        case DISABLED_CONFIGURATION:
+                log_syntax(unit, LOG_DEBUG, filename, line, 0,
+                           "Support for option %s= has been disabled at compile time and it is ignored", lvalue);
+                break;
+
+        case DISABLED_LEGACY:
+                log_syntax(unit, LOG_INFO, filename, line, 0,
+                           "Support for option %s= has been removed and it is ignored", lvalue);
+                break;
+
+        case DISABLED_EXPERIMENTAL:
+                log_syntax(unit, LOG_INFO, filename, line, 0,
+                           "Support for option %s= has not yet been enabled and it is ignored", lvalue);
+                break;
+        }
+
+        return 0;
+}
+
+int config_parse_log_facility(
+                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) {
+
+        int *o = data, x;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        x = log_facility_unshifted_from_string(rvalue);
+        if (x < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, x, "Failed to parse log facility, ignoring: %s", rvalue);
+                return 0;
+        }
+
+        *o = (x << 3) | LOG_PRI(*o);
+
+        return 0;
+}
+
+int config_parse_log_level(
+                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) {
+
+        int *o = data, x;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(data);
+
+        x = log_level_from_string(rvalue);
+        if (x < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, x, "Failed to parse log level, ignoring: %s", rvalue);
+                return 0;
+        }
+
+        if (*o < 0) /* if it wasn't initialized so far, assume zero facility */
+                *o = x;
+        else
+                *o = (*o & LOG_FACMASK) | x;
+
+        return 0;
+}
+
+int config_parse_signal(
+                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) {
+
+        int *sig = data, r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(sig);
+
+        r = signal_from_string(rvalue);
+        if (r <= 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse signal name, ignoring: %s", rvalue);
+                return 0;
+        }
+
+        *sig = r;
+        return 0;
+}
+
+int config_parse_personality(
+                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) {
+
+        unsigned long *personality = data, p;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(personality);
+
+        if (isempty(rvalue))
+                p = PERSONALITY_INVALID;
+        else {
+                p = personality_from_string(rvalue);
+                if (p == PERSONALITY_INVALID) {
+                        log_syntax(unit, LOG_WARNING, filename, line, 0, "Failed to parse personality, ignoring: %s", rvalue);
+                        return 0;
+                }
+        }
+
+        *personality = p;
+        return 0;
+}
+
+int config_parse_ifname(
+                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) {
+
+        char **s = ASSERT_PTR(data);
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        if (isempty(rvalue)) {
+                *s = mfree(*s);
+                return 0;
+        }
+
+        if (!ifname_valid(rvalue)) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0, "Interface name is not valid or too long, ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        r = free_and_strdup(s, rvalue);
+        if (r < 0)
+                return log_oom();
+
+        return 0;
+}
+
+int config_parse_ifnames(
+                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_strv_free_ char **names = NULL;
+        char ***s = ASSERT_PTR(data);
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        if (isempty(rvalue)) {
+                *s = strv_free(*s);
+                return 0;
+        }
+
+        for (const char *p = rvalue;;) {
+                _cleanup_free_ char *word = NULL;
+
+                r = extract_first_word(&p, &word, NULL, 0);
+                if (r == -ENOMEM)
+                        return log_oom();
+                if (r < 0) {
+                        log_syntax(unit, LOG_WARNING, filename, line, r,
+                                   "Failed to extract interface name, ignoring assignment: %s",
+                                   rvalue);
+                        return 0;
+                }
+                if (r == 0)
+                        break;
+
+                if (!ifname_valid_full(word, ltype)) {
+                        log_syntax(unit, LOG_WARNING, filename, line, 0,
+                                   "Interface name is not valid or too long, ignoring assignment: %s",
+                                   word);
+                        continue;
+                }
+
+                r = strv_consume(&names, TAKE_PTR(word));
+                if (r < 0)
+                        return log_oom();
+        }
+
+        r = strv_extend_strv(s, names, true);
+        if (r < 0)
+                return log_oom();
+
+        return 0;
+}
+
+int config_parse_ip_port(
+                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) {
+
+        uint16_t *s = ASSERT_PTR(data);
+        uint16_t port;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        if (isempty(rvalue)) {
+                *s = 0;
+                return 0;
+        }
+
+        r = parse_ip_port(rvalue, &port);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse port '%s'.", rvalue);
+                return 0;
+        }
+
+        *s = port;
+
+        return 0;
+}
+
+int config_parse_mtu(
+                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) {
+
+        uint32_t *mtu = ASSERT_PTR(data);
+        int r;
+
+        assert(rvalue);
+
+        r = parse_mtu(ltype, rvalue, mtu);
+        if (r == -ERANGE) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Maximum transfer unit (MTU) value out of range. Permitted range is %" PRIu32 "…%" PRIu32 ", ignoring: %s",
+                           (uint32_t) (ltype == AF_INET6 ? IPV6_MIN_MTU : IPV4_MIN_MTU), (uint32_t) UINT32_MAX,
+                           rvalue);
+                return 0;
+        }
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse MTU value '%s', ignoring: %m", rvalue);
+                return 0;
+        }
+
+        return 0;
+}
+
+int config_parse_rlimit(
+                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) {
+
+        struct rlimit **rl = data, d = {};
+        int r;
+
+        assert(rvalue);
+        assert(rl);
+
+        r = rlimit_parse(ltype, rvalue, &d);
+        if (r == -EILSEQ) {
+                log_syntax(unit, LOG_WARNING, filename, line, r, "Soft resource limit chosen higher than hard limit, ignoring: %s", rvalue);
+                return 0;
+        }
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse resource value, ignoring: %s", rvalue);
+                return 0;
+        }
+
+        if (rl[ltype])
+                *rl[ltype] = d;
+        else {
+                rl[ltype] = newdup(struct rlimit, &d, 1);
+                if (!rl[ltype])
+                        return log_oom();
+        }
+
+        return 0;
+}
+
+int config_parse_permille(
+                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) {
+
+        unsigned *permille = ASSERT_PTR(data);
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        r = parse_permille(rvalue);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse permille value, ignoring: %s", rvalue);
+                return 0;
+        }
+
+        *permille = (unsigned) r;
+
+        return 0;
+}
+
+int config_parse_vlanprotocol(
+                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) {
+
+        int *vlan_protocol = data;
+
+        assert(filename);
+        assert(lvalue);
+
+        if (isempty(rvalue)) {
+                *vlan_protocol = -1;
+                return 0;
+        }
+
+        if (STR_IN_SET(rvalue, "802.1ad", "802.1AD"))
+                *vlan_protocol = ETH_P_8021AD;
+        else if (STR_IN_SET(rvalue, "802.1q", "802.1Q"))
+                *vlan_protocol = ETH_P_8021Q;
+        else {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "Failed to parse VLAN protocol value, ignoring: %s", rvalue);
+                return 0;
+        }
+
+        return 0;
+}
+
+int config_parse_hw_addr(
+                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) {
+
+        struct hw_addr_data a, *hwaddr = ASSERT_PTR(data);
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        if (isempty(rvalue)) {
+                *hwaddr = HW_ADDR_NULL;
+                return 0;
+        }
+
+        r = parse_hw_addr_full(rvalue, ltype, &a);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Not a valid hardware address, ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        *hwaddr = a;
+        return 0;
+}
+
+int config_parse_hw_addrs(
+                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) {
+
+        Set **hwaddrs = ASSERT_PTR(data);
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        if (isempty(rvalue)) {
+                /* Empty assignment resets the list */
+                *hwaddrs = set_free(*hwaddrs);
+                return 0;
+        }
+
+        for (const char *p = rvalue;;) {
+                _cleanup_free_ char *word = NULL;
+                _cleanup_free_ struct hw_addr_data *n = NULL;
+
+                r = extract_first_word(&p, &word, NULL, 0);
+                if (r == 0)
+                        return 0;
+                if (r == -ENOMEM)
+                        return log_oom();
+                if (r < 0) {
+                        log_syntax(unit, LOG_WARNING, filename, line, r,
+                                   "Invalid syntax, ignoring: %s", rvalue);
+                        return 0;
+                }
+
+                n = new(struct hw_addr_data, 1);
+                if (!n)
+                        return log_oom();
+
+                r = parse_hw_addr_full(word, ltype, n);
+                if (r < 0) {
+                        log_syntax(unit, LOG_WARNING, filename, line, r,
+                                   "Not a valid hardware address, ignoring: %s", word);
+                        continue;
+                }
+
+                r = set_ensure_consume(hwaddrs, &hw_addr_hash_ops_free, TAKE_PTR(n));
+                if (r < 0)
+                        return log_oom();
+        }
+}
+
+int config_parse_ether_addr(
+                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_ struct ether_addr *n = NULL;
+        struct ether_addr **hwaddr = ASSERT_PTR(data);
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        if (isempty(rvalue)) {
+                *hwaddr = mfree(*hwaddr);
+                return 0;
+        }
+
+        n = new0(struct ether_addr, 1);
+        if (!n)
+                return log_oom();
+
+        r = parse_ether_addr(rvalue, n);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Not a valid MAC address, ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        free_and_replace(*hwaddr, n);
+
+        return 0;
+}
+
+int config_parse_ether_addrs(
+                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) {
+
+        Set **hwaddrs = ASSERT_PTR(data);
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        if (isempty(rvalue)) {
+                /* Empty assignment resets the list */
+                *hwaddrs = set_free(*hwaddrs);
+                return 0;
+        }
+
+        for (const char *p = rvalue;;) {
+                _cleanup_free_ char *word = NULL;
+                _cleanup_free_ struct ether_addr *n = NULL;
+
+                r = extract_first_word(&p, &word, NULL, 0);
+                if (r == 0)
+                        return 0;
+                if (r == -ENOMEM)
+                        return log_oom();
+                if (r < 0) {
+                        log_syntax(unit, LOG_WARNING, filename, line, r,
+                                   "Invalid syntax, ignoring: %s", rvalue);
+                        return 0;
+                }
+
+                n = new(struct ether_addr, 1);
+                if (!n)
+                        return log_oom();
+
+                r = parse_ether_addr(word, n);
+                if (r < 0) {
+                        log_syntax(unit, LOG_WARNING, filename, line, r,
+                                   "Not a valid MAC address, ignoring: %s", word);
+                        continue;
+                }
+
+                r = set_ensure_consume(hwaddrs, &ether_addr_hash_ops_free, TAKE_PTR(n));
+                if (r < 0)
+                        return log_oom();
+        }
+}
+
+int config_parse_in_addr_non_null(
+                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) {
+
+        /* data must be a pointer to struct in_addr or in6_addr, and the type is determined by ltype. */
+        struct in_addr *ipv4 = ASSERT_PTR(data);
+        struct in6_addr *ipv6 = ASSERT_PTR(data);
+        union in_addr_union a;
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+        assert(IN_SET(ltype, AF_INET, AF_INET6));
+
+        if (isempty(rvalue)) {
+                if (ltype == AF_INET)
+                        *ipv4 = (struct in_addr) {};
+                else
+                        *ipv6 = (struct in6_addr) {};
+                return 0;
+        }
+
+        r = in_addr_from_string(ltype, rvalue, &a);
+        if (r < 0) {
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse %s=, ignoring assignment: %s", lvalue, rvalue);
+                return 0;
+        }
+
+        if (!in_addr_is_set(ltype, &a)) {
+                log_syntax(unit, LOG_WARNING, filename, line, 0,
+                           "%s= cannot be the ANY address, ignoring: %s", lvalue, rvalue);
+                return 0;
+        }
+
+        if (ltype == AF_INET)
+                *ipv4 = a.in;
+        else
+                *ipv6 = a.in6;
+        return 0;
+}
+
+int config_parse_unsigned_bounded(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *name,
+                const char *value,
+                unsigned min,
+                unsigned max,
+                bool ignoring,
+                unsigned *ret) {
+
+        int r;
+
+        assert(filename);
+        assert(name);
+        assert(value);
+        assert(ret);
+
+        r = safe_atou_bounded(value, min, max, ret);
+        if (r == -ERANGE)
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Invalid '%s=%s', allowed range is %u..%u%s.",
+                           name, value, min, max, ignoring ? ", ignoring" : "");
+        else if (r < 0)
+                log_syntax(unit, LOG_WARNING, filename, line, r,
+                           "Failed to parse '%s=%s'%s: %m",
+                           name, value, ignoring ? ", ignoring" : "");
+
+        if (r >= 0)
+                return 1;  /* Return 1 if something was set */
+        else if (ignoring)
+                return 0;
+        else
+                return r;
+}
+
+DEFINE_CONFIG_PARSE(config_parse_percent, parse_percent, "Failed to parse percent value");
+DEFINE_CONFIG_PARSE(config_parse_permyriad, parse_permyriad, "Failed to parse permyriad value");
+DEFINE_CONFIG_PARSE_PTR(config_parse_sec_fix_0, parse_sec_fix_0, usec_t, "Failed to parse time value");