From f4fef930619df47e26093bde6e5e851e40402364 Mon Sep 17 00:00:00 2001
From: YuQing <384681@qq.com>
Date: Tue, 5 Mar 2024 16:28:04 +0800
Subject: [PATCH] add function is_loopback_ip

---
 src/local_ip_func.c | 4 +---
 src/local_ip_func.h | 7 +++++++
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/src/local_ip_func.c b/src/local_ip_func.c
index 225ea4c..7ab1290 100644
--- a/src/local_ip_func.c
+++ b/src/local_ip_func.c
@@ -160,9 +160,7 @@ const char *get_next_local_ip(const char *previous_ip)
 		IP_ADDRESS_SIZE * g_local_host_ip_count;
 	for (p=g_local_host_ip_addrs; p<pEnd; p+=IP_ADDRESS_SIZE)
     {
-        if (strcmp(p, LOCAL_LOOPBACK_IPv4) != 0 &&
-                strcmp(p, LOCAL_LOOPBACK_IPv6) != 0 &&
-                strcasecmp(p, "fe80::1") != 0)
+        if (!is_loopback_ip(p))
         {
             if (found)
             {
diff --git a/src/local_ip_func.h b/src/local_ip_func.h
index 290eb0f..592fc9f 100644
--- a/src/local_ip_func.h
+++ b/src/local_ip_func.h
@@ -42,6 +42,13 @@ extern char g_if_alias_prefix[FAST_IF_ALIAS_PREFIX_MAX_SIZE];
 void load_local_host_ip_addrs();
 bool is_local_host_ip(const char *client_ip);
 
+static inline bool is_loopback_ip(const char *ip_addr)
+{
+    return (strcmp(ip_addr, LOCAL_LOOPBACK_IPv4) == 0 ||
+            strcmp(ip_addr, LOCAL_LOOPBACK_IPv6) == 0 ||
+            strcasecmp(ip_addr, "fe80::1") == 0);
+}
+
 void stat_local_host_ip(int *ipv4_count, int *ipv6_count);
 
 const char *get_first_local_ip();