diff --git a/test/case52/src/testcase52.c b/test/case52/src/testcase52.c
index 19020be..5515bd3 100755
--- a/test/case52/src/testcase52.c
+++ b/test/case52/src/testcase52.c
@@ -95,6 +95,11 @@ void *handleUdpTransmission(void *arg)
     server_addr_case52.sin_addr.s_addr = inet_addr(SERVER_IP_CASE52);       // IP转换
     // int flags = fcntl(sockfd_case52, F_GETFL, 0);
     // fcntl(sockfd_case52, F_SETFL, flags | O_NONBLOCK);
+    char *message = "test";
+    sendto(sockfd_case52, message, strlen(message), 0,
+           (struct sockaddr *)&server_addr_case52, sizeof(server_addr_case52));
+    printf("[sendto]:%s\n", message);
+
     printf("[socket]:UDP ready\n");
     // mmap
     /************************************************************************************** */
@@ -237,7 +242,7 @@ void *handleUdpTransmission(void *arg)
                             udp_data_buffer,
                             sizeof(udp_data_buffer),
                             0,
-                            (const struct sockaddr*)&server_addr_case52,
+                            (struct sockaddr*)&server_addr_case52,
                             sizeof(server_addr_case52)
                         );
                         if (send_len == -1) {
@@ -263,7 +268,7 @@ void *handleUdpTransmission(void *arg)
                             udp_data_buffer,
                             sizeof(udp_data_buffer),
                             0,
-                            (const struct sockaddr*)&server_addr_case52,
+                            (struct sockaddr*)&server_addr_case52,
                             sizeof(server_addr_case52)
                         );
                         if (send_len == -1) {
@@ -285,7 +290,7 @@ void *handleUdpTransmission(void *arg)
                             udp_data_buffer,
                             sizeof(udp_data_buffer),
                             0,
-                            (const struct sockaddr*)&server_addr_case52,
+                            (struct sockaddr*)&server_addr_case52,
                             sizeof(server_addr_case52)
                         );
                         if (send_len == -1) {