网卡ipv6地址不存在kdk_nc_get_ipv6接口返回NULL

src/hardware/libkync.c

@@ -433,32 +433,35 @@ char **_get_nc_cfg(const char *nc, enum cardcfg cfg)
             }
         }
 
-        res = malloc(sizeof(char *));
+        if(strlen(addr) != 0)
-        if (!res)
         {
-            klog_err("内存申请失败:%s\n", strerror(errno));
+            res = malloc(sizeof(char *));
-            close(sfd);
+            if (!res)
+            {
+                klog_err("内存申请失败:%s\n", strerror(errno));
+                close(sfd);
+                freeifaddrs(ifap);
+                return NULL;
+            }
+            res[0] = malloc(sizeof(char) * INET6_ADDRSTRLEN);
+            if (!res[0])
+            {
+                free(res);
+                klog_err("内存申请失败:%s\n", strerror(errno));
+                close(sfd);
+                freeifaddrs(ifap);
+                return NULL;
+            }
+
+            int i = 0;
+            while (addr[i] != '%' && addr[i] != '\0')
+                i++;
+            addr[i] = '\0';
+            
+            sprintf(res[0], "%s", addr);
+
             freeifaddrs(ifap);
-            return NULL;
         }
-        res[0] = malloc(sizeof(char) * INET6_ADDRSTRLEN);
-        if (!res[0])
-        {
-            free(res);
-            klog_err("内存申请失败:%s\n", strerror(errno));
-            close(sfd);
-            freeifaddrs(ifap);
-            return NULL;
-        }
-
-        int i = 0;
-        while (addr[i] != '%' && addr[i] != '\0')
-            i++;
-        addr[i] = '\0';
-
-        sprintf(res[0], "%s", addr);
-
-        freeifaddrs(ifap);
     }
     break;
     default:
@@ -528,10 +531,12 @@ char *kdk_nc_get_private_ipv6(const char *nc)
     if (!nc)
         return NULL;
 
+    char *ipv6 = NULL;
+
     char **ipv6list = _get_nc_cfg(nc, NCCFG_IPv6);
     if (!ipv6list)
         return NULL;
-    char *ipv6 = ipv6list[0];
+    ipv6 = ipv6list[0];
     free(ipv6list);
     return ipv6;
 }