From 8cde9f6c5a5722d72d6a0869b343603a34c2e869 Mon Sep 17 00:00:00 2001
From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Mon, 23 Sep 2024 01:50:44 +0900
Subject: [PATCH] conf-parser: introduce config_parse_in_addr_prefix()

It is not used currently, but will be used later.
---
 src/shared/conf-parser.c | 39 ++++++++++++++++++++++++++++++++++++++-
 src/shared/conf-parser.h |  1 +
 2 files changed, 39 insertions(+), 1 deletion(-)

diff --git a/src/shared/conf-parser.c b/src/shared/conf-parser.c
index 8b32f2a9bb2..8c5a4a7013a 100644
--- a/src/shared/conf-parser.c
+++ b/src/shared/conf-parser.c
@@ -24,7 +24,7 @@
 #include "hash-funcs.h"
 #include "hostname-util.h"
 #include "id128-util.h"
-#include "in-addr-util.h"
+#include "in-addr-prefix-util.h"
 #include "ip-protocol-list.h"
 #include "log.h"
 #include "macro.h"
@@ -2002,6 +2002,43 @@ int config_parse_in_addr_data(
         return 1;
 }
 
+int config_parse_in_addr_prefix(
+                const char *unit,
+                const char *filename,
+                unsigned line,
+                const char *section,
+                unsigned section_line,
+                const char *lvalue,
+                int ltype, /* takes boolean, whether we warn about missing prefixlen */
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        struct in_addr_prefix *p = ASSERT_PTR(data);
+        int r;
+
+        assert(filename);
+        assert(lvalue);
+
+        if (isempty(rvalue)) {
+                *p = (struct in_addr_prefix) {};
+                return 1;
+        }
+
+        r = in_addr_prefix_from_string_auto_full(rvalue, ltype ? PREFIXLEN_REFUSE : PREFIXLEN_FULL, &p->family, &p->address, &p->prefixlen);
+        if (r == -ENOANO) {
+                r = in_addr_prefix_from_string_auto(rvalue, &p->family, &p->address, &p->prefixlen);
+                if (r >= 0)
+                        log_syntax(unit, LOG_WARNING, filename, line, r,
+                                   "%s=%s is specified without prefix length. Assuming the prefix length is %u. "
+                                   "Please specify the prefix length explicitly.", lvalue, rvalue, p->prefixlen);
+        }
+        if (r < 0)
+                return log_syntax_parse_error(unit, filename, line, r, lvalue, rvalue);
+
+        return 1;
+}
+
 int config_parse_unsigned_bounded(
                 const char *unit,
                 const char *filename,
diff --git a/src/shared/conf-parser.h b/src/shared/conf-parser.h
index 8767902a501..1599738f849 100644
--- a/src/shared/conf-parser.h
+++ b/src/shared/conf-parser.h
@@ -305,6 +305,7 @@ CONFIG_PARSER_PROTOTYPE(config_parse_ether_addr);
 CONFIG_PARSER_PROTOTYPE(config_parse_ether_addrs);
 CONFIG_PARSER_PROTOTYPE(config_parse_in_addr_non_null);
 CONFIG_PARSER_PROTOTYPE(config_parse_in_addr_data);
+CONFIG_PARSER_PROTOTYPE(config_parse_in_addr_prefix);
 CONFIG_PARSER_PROTOTYPE(config_parse_percent);
 CONFIG_PARSER_PROTOTYPE(config_parse_permyriad);
 CONFIG_PARSER_PROTOTYPE(config_parse_pid);
-- 
2.47.3