From f63647218e192628aa8598d504e064529398f159 Mon Sep 17 00:00:00 2001
From: guowenxue <guowenxue@gmail.com>
Date: Mon, 06 Nov 2023 17:22:09 +0800
Subject: [PATCH] rename ddns example code
---
ch2_socket/sockudp_server.c | 124 ++++++++++++++++++++--------------------
1 files changed, 62 insertions(+), 62 deletions(-)
diff --git a/ch2_socket/sockudp_server.c b/ch2_socket/sockudp_server.c
index 56166d1..0e31f77 100644
--- a/ch2_socket/sockudp_server.c
+++ b/ch2_socket/sockudp_server.c
@@ -1,14 +1,14 @@
/*********************************************************************************
- * Copyright: (C) 2018 LingYun IoT Studio
- * All rights reserved.
+ * Copyright: (C) 2018 LingYun IoT Studio
+ * All rights reserved.
*
- * Filename: socket_server.c
- * Description: This file is UDP socket server example source code.
- *
- * Version: 1.0.0(10/23/2018)
- * Author: Guo Wenxue <guowenxue@gmail.com>
- * ChangeLog: 1, Release initial version on "2017-10-23 01:41:05 PM"
- *
+ * Filename: socket_server.c
+ * Description: This file is UDP socket server example source code.
+ *
+ * Version: 1.0.0(10/23/2018)
+ * Author: Guo Wenxue <guowenxue@gmail.com>
+ * ChangeLog: 1, Release initial version on "2017-10-23 01:41:05 PM"
+ *
********************************************************************************/
#include <stdio.h>
@@ -20,67 +20,67 @@
#include <netinet/in.h>
#include <arpa/inet.h>
-#define LISTEN_PORT 8890
-#define BACKLOG 13
+#define LISTEN_PORT 8890
+#define BACKLOG 13
int main(int argc, char **argv)
{
- int rv = -1;
- int sockfd;
- struct sockaddr_in serv_addr;
- struct sockaddr_in cli_addr;
- socklen_t addr_len = sizeof(cli_addr);
- char buf[1024];
- int reuse = 1;
+ int rv = -1;
+ int sockfd;
+ struct sockaddr_in serv_addr;
+ struct sockaddr_in cli_addr;
+ socklen_t addr_len = sizeof(cli_addr);
+ char buf[1024];
+ int reuse = 1;
- /* create UDP socket */
- sockfd = socket(AF_INET, SOCK_DGRAM, 0);
- if(sockfd < 0 )
- {
- printf("create socket failure: %s\n", strerror(errno));
- return -1;
- }
- printf("socket create fd[%d]\n", sockfd);
+ /* create UDP socket */
+ sockfd = socket(AF_INET, SOCK_DGRAM, 0);
+ if(sockfd < 0 )
+ {
+ printf("create socket failure: %s\n", strerror(errno));
+ return -1;
+ }
+ printf("socket create fd[%d]\n", sockfd);
- /* fix port can not be used when stop server program and run it again immediately */
- setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse));
+ /* fix port can not be used when stop server program and run it again immediately */
+ setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse));
- /* bind socket server information */
- memset(&serv_addr, 0, sizeof(serv_addr));
- serv_addr.sin_family = AF_INET;
- serv_addr.sin_port = htons(LISTEN_PORT);
- serv_addr.sin_addr.s_addr = htonl(INADDR_ANY);
- if( bind(sockfd, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0 )
- {
- printf("create socket failure: %s\n", strerror(errno));
- return -2;
- }
- printf("socket[%d] bind on port[%d] for all IP address ok\n", sockfd, LISTEN_PORT);
+ /* bind socket server information */
+ memset(&serv_addr, 0, sizeof(serv_addr));
+ serv_addr.sin_family = AF_INET;
+ serv_addr.sin_port = htons(LISTEN_PORT);
+ serv_addr.sin_addr.s_addr = htonl(INADDR_ANY);
+ if( bind(sockfd, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0 )
+ {
+ printf("create socket failure: %s\n", strerror(errno));
+ return -2;
+ }
+ printf("socket[%d] bind on port[%d] for all IP address ok\n", sockfd, LISTEN_PORT);
- while(1)
- {
- /* receive message from socket client */
- memset(buf, 0, sizeof(buf));
- if( (rv=recvfrom(sockfd, buf, sizeof(buf), 0, (struct sockaddr *)&cli_addr, &addr_len)) < 0)
- {
- printf("Read data from socket[%d] failure: %s\n", sockfd, strerror(errno));
- break;
- }
- printf("Read [%d] bytes data from client[%s:%d]: %s\n",
- rv, inet_ntoa(cli_addr.sin_addr), ntohs(cli_addr.sin_port), buf);
+ while(1)
+ {
+ /* receive message from socket client */
+ memset(buf, 0, sizeof(buf));
+ if( (rv=recvfrom(sockfd, buf, sizeof(buf), 0, (struct sockaddr *)&cli_addr, &addr_len)) < 0)
+ {
+ printf("Read data from socket[%d] failure: %s\n", sockfd, strerror(errno));
+ break;
+ }
+ printf("Read [%d] bytes data from client[%s:%d]: %s\n",
+ rv, inet_ntoa(cli_addr.sin_addr), ntohs(cli_addr.sin_port), buf);
- /* send message to socket client */
- printf("Reply back to socket client...\n");
- snprintf(buf, sizeof(buf), "Hello, socket client [%s:%d]\n", inet_ntoa(cli_addr.sin_addr), ntohs(cli_addr.sin_port));
- if( (rv=sendto(sockfd, buf, sizeof(buf), 0, (struct sockaddr *)&cli_addr, addr_len)) < 0)
- {
- printf("Reply back to socket client[%d] failure: %s\n", sockfd, strerror(errno));
- break;
- }
- printf("\n");
- }
+ /* send message to socket client */
+ printf("Reply back to socket client...\n");
+ snprintf(buf, sizeof(buf), "Hello, socket client [%s:%d]\n", inet_ntoa(cli_addr.sin_addr), ntohs(cli_addr.sin_port));
+ if( (rv=sendto(sockfd, buf, sizeof(buf), 0, (struct sockaddr *)&cli_addr, addr_len)) < 0)
+ {
+ printf("Reply back to socket client[%d] failure: %s\n", sockfd, strerror(errno));
+ break;
+ }
+ printf("\n");
+ }
- close(sockfd);
- return 0;
+ close(sockfd);
+ return 0;
}
--
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