From 7856bf3569cc448fe3b360c3fca836593a0c0c7d Mon Sep 17 00:00:00 2001
From: guowenxue <guowenxue@gmail.com>
Date: Mon, 06 Nov 2023 17:01:27 +0800
Subject: [PATCH] format c source code
---
ch1_fileIO/redirect_stdio.c | 20 +-
ch2_socket/socktcp_server.c | 166 ++++++++--------
ch2_socket/sockudp_client.c | 104 +++++-----
ch1_fileIO/file_io.c | 6
ch1_fileIO/stat.c | 10
ch2_socket/socktcp_client.c | 128 ++++++------
ch1_fileIO/access.c | 10
ch1_fileIO/syserr.c | 6
ch2_socket/sockudp_server.c | 124 ++++++------
9 files changed, 287 insertions(+), 287 deletions(-)
diff --git a/ch1_fileIO/access.c b/ch1_fileIO/access.c
index 46c2b0d..8540f85 100644
--- a/ch1_fileIO/access.c
+++ b/ch1_fileIO/access.c
@@ -3,10 +3,10 @@
#include <unistd.h>
#define TEST_FILE "access.c"
-
+
int main(void)
{
- if( access(TEST_FILE, F_OK)!=0 )
+ if( access(TEST_FILE, F_OK)!=0 )
{
printf("File %s not exist!\n", TEST_FILE);
return 0;
@@ -14,13 +14,13 @@
printf("File %s exist!\n", TEST_FILE);
- if(access(TEST_FILE, R_OK)==0)
+ if(access(TEST_FILE, R_OK)==0)
printf("READ OK\n");
- if(access(TEST_FILE, W_OK)==0)
+ if(access(TEST_FILE, W_OK)==0)
printf("WRITE OK\n");
- if(access(TEST_FILE, X_OK)==0)
+ if(access(TEST_FILE, X_OK)==0)
printf("EXEC OK\n");
return 0;
diff --git a/ch1_fileIO/file_io.c b/ch1_fileIO/file_io.c
index 79b2365..c04a98b 100644
--- a/ch1_fileIO/file_io.c
+++ b/ch1_fileIO/file_io.c
@@ -1,6 +1,6 @@
-#include <stdio.h>
+#include <stdio.h>
#include <errno.h>
-#include <string.h>
+#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
@@ -40,6 +40,6 @@
cleanup:
close(fd);
-
+
return 0;
}
diff --git a/ch1_fileIO/redirect_stdio.c b/ch1_fileIO/redirect_stdio.c
index a73f1ea..f02e031 100644
--- a/ch1_fileIO/redirect_stdio.c
+++ b/ch1_fileIO/redirect_stdio.c
@@ -1,28 +1,28 @@
-#include <stdio.h>
-#include <string.h>
-#include <errno.h>
-#include <unistd.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
int main(int argc, char *argv)
-{
- int fd = -1;
+{
+ int fd = -1;
fd = open("std.txt", O_RDWR|O_CREAT|O_TRUNC, 0666);
if(fd < 0)
{
printf("Open file failure: %s\n", strerror(errno));
return 1;
- }
-
+ }
+
dup2(fd, STDIN_FILENO);
dup2(fd, STDOUT_FILENO);
dup2(fd, STDERR_FILENO);
- printf("fd=%d\n", fd);
-
+ printf("fd=%d\n", fd);
+
close(fd);
return 0;
diff --git a/ch1_fileIO/stat.c b/ch1_fileIO/stat.c
index bf3ba9d..2ce2d59 100644
--- a/ch1_fileIO/stat.c
+++ b/ch1_fileIO/stat.c
@@ -5,11 +5,11 @@
int main (int argc, char **argv)
{
- struct stat stbuf;
-
- stat("stat.c", &stbuf);
- printf("File Mode: %o Real Size: %luB, Space Size: %luB\n", stbuf.st_mode, stbuf.st_size, stbuf.st_blksize);
-
+ struct stat stbuf;
+
+ stat("stat.c", &stbuf);
+ printf("File Mode: %o Real Size: %luB, Space Size: %luB\n", stbuf.st_mode, stbuf.st_size, stbuf.st_blksize);
+
return 0;
}
diff --git a/ch1_fileIO/syserr.c b/ch1_fileIO/syserr.c
index 22f775b..df8ed1f 100644
--- a/ch1_fileIO/syserr.c
+++ b/ch1_fileIO/syserr.c
@@ -11,12 +11,12 @@
{
char *file_name = "/test.txt";
int fd=-1;
-
+
fd=open(file_name, O_RDONLY, 066);
if( fd < 0 )
{
- perror("Open file failure");
- printf("Open file %s failure: %s\n", file_name, strerror(errno));
+ perror("Open file failure");
+ printf("Open file %s failure: %s\n", file_name, strerror(errno));
return 0;
}
diff --git a/ch2_socket/socktcp_client.c b/ch2_socket/socktcp_client.c
index 2040cf6..603f017 100644
--- a/ch2_socket/socktcp_client.c
+++ b/ch2_socket/socktcp_client.c
@@ -1,14 +1,14 @@
/*********************************************************************************
- * Copyright: (C) 2018 LingYun IoT Studio
- * All rights reserved.
+ * Copyright: (C) 2018 LingYun IoT Studio
+ * All rights reserved.
*
- * Filename: socktcp_client.c
- * Description: This file is TCP socket client example source code.
- *
- * Version: 1.0.0(10/23/2018)
- * Author: Guo Wenxue <guowenxue@gmail.com>
- * ChangeLog: 1, Release initial version on "2018-10-23 01:38:08 PM"
- *
+ * Filename: socktcp_client.c
+ * Description: This file is TCP socket client example source code.
+ *
+ * Version: 1.0.0(10/23/2018)
+ * Author: Guo Wenxue <guowenxue@gmail.com>
+ * ChangeLog: 1, Release initial version on "2018-10-23 01:38:08 PM"
+ *
********************************************************************************/
#include <stdio.h>
#include <errno.h>
@@ -20,71 +20,71 @@
#include <netinet/in.h>
#include <arpa/inet.h>
-#define SERVER_IP "127.0.0.1"
-#define SERVER_PORT 8889
+#define SERVER_IP "127.0.0.1"
+#define SERVER_PORT 8889
int main(int argc, char **argv)
{
- int conn_fd = -1;
- int rv = -1;
- char buf[1024];
- struct sockaddr_in serv_addr;
- float temp;
+ int conn_fd = -1;
+ int rv = -1;
+ char buf[1024];
+ struct sockaddr_in serv_addr;
+ float temp;
- /* create TCP socket */
- conn_fd = socket(AF_INET, SOCK_STREAM, 0);
- if(conn_fd < 0)
- {
- printf("create socket failure: %s\n", strerror(errno));
- return -1;
- }
+ /* create TCP socket */
+ conn_fd = socket(AF_INET, SOCK_STREAM, 0);
+ if(conn_fd < 0)
+ {
+ printf("create socket failure: %s\n", strerror(errno));
+ return -1;
+ }
- /* set socket server information */
- memset(&serv_addr, 0, sizeof(serv_addr));
- serv_addr.sin_family = AF_INET;
- serv_addr.sin_port = htons(SERVER_PORT);
- inet_aton( SERVER_IP, &serv_addr.sin_addr );
+ /* set socket server information */
+ memset(&serv_addr, 0, sizeof(serv_addr));
+ serv_addr.sin_family = AF_INET;
+ serv_addr.sin_port = htons(SERVER_PORT);
+ inet_aton( SERVER_IP, &serv_addr.sin_addr );
- /* connect to socket server */
- if( connect(conn_fd, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0)
- {
- printf("connect to server [%s:%d] failure: %s\n", SERVER_IP, SERVER_PORT, strerror(errno));
- return 0;
- }
+ /* connect to socket server */
+ if( connect(conn_fd, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0)
+ {
+ printf("connect to server [%s:%d] failure: %s\n", SERVER_IP, SERVER_PORT, strerror(errno));
+ return 0;
+ }
- while(1)
- {
- /* send message to socket server */
- strncpy(buf, "Hello, LingYun IoT socket server!", sizeof(buf));
- if( write(conn_fd, buf, strlen(buf)) < 0 )
- {
- printf("Write data to server [%s:%d] failure: %s\n", SERVER_IP, SERVER_PORT, strerror(errno));
- goto cleanup;
- }
- printf("Send message to socket server okay\n");
+ while(1)
+ {
+ /* send message to socket server */
+ strncpy(buf, "Hello, LingYun IoT socket server!", sizeof(buf));
+ if( write(conn_fd, buf, strlen(buf)) < 0 )
+ {
+ printf("Write data to server [%s:%d] failure: %s\n", SERVER_IP, SERVER_PORT, strerror(errno));
+ goto cleanup;
+ }
+ printf("Send message to socket server okay\n");
- /* receive message from socket server */
- memset(buf, 0, sizeof(buf));
- printf("Wating reply from socket server...\n");
- rv = read(conn_fd, buf, sizeof(buf));
- if(rv < 0)
- {
- printf("Read data from server failure: %s\n", strerror(errno));
- goto cleanup;
- }
- else if( 0 == rv )
- {
- printf("Client connect to server get disconnected\n");
- goto cleanup;
- }
- printf("Receive [%d] bytes data from server: %s", rv, buf);
- printf("\n");
+ /* receive message from socket server */
+ memset(buf, 0, sizeof(buf));
+ printf("Wating reply from socket server...\n");
+ rv = read(conn_fd, buf, sizeof(buf));
+ if(rv < 0)
+ {
+ printf("Read data from server failure: %s\n", strerror(errno));
+ goto cleanup;
+ }
+ else if( 0 == rv )
+ {
+ printf("Client connect to server get disconnected\n");
+ goto cleanup;
+ }
+ printf("Receive [%d] bytes data from server: %s", rv, buf);
+ printf("\n");
- sleep(3);
- }
+ sleep(3);
+ }
cleanup:
- close(conn_fd);
- return 0;
+ close(conn_fd);
+ return 0;
}
diff --git a/ch2_socket/socktcp_server.c b/ch2_socket/socktcp_server.c
index 17ab23c..34c3ec9 100644
--- a/ch2_socket/socktcp_server.c
+++ b/ch2_socket/socktcp_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 TCP 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 TCP 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>
@@ -20,92 +20,92 @@
#include <netinet/in.h>
#include <arpa/inet.h>
-#define LISTEN_PORT 8889
-#define BACKLOG 13
+#define LISTEN_PORT 8889
+#define BACKLOG 13
int main(int argc, char **argv)
{
- int rv = -1;
- int listen_fd, client_fd = -1;
- 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 listen_fd, client_fd = -1;
+ struct sockaddr_in serv_addr;
+ struct sockaddr_in cli_addr;
+ socklen_t addr_len = sizeof(cli_addr);
+ char buf[1024];
+ int reuse = 1;
- /* create TCP socket */
- listen_fd = socket(AF_INET, SOCK_STREAM, 0);
- if(listen_fd < 0 )
- {
- printf("create socket failure: %s\n", strerror(errno));
- return -1;
- }
- printf("socket create fd[%d]\n", listen_fd);
+ /* create TCP socket */
+ listen_fd = socket(AF_INET, SOCK_STREAM, 0);
+ if(listen_fd < 0 )
+ {
+ printf("create socket failure: %s\n", strerror(errno));
+ return -1;
+ }
+ printf("socket create fd[%d]\n", listen_fd);
- /* Fix port can not be used when stop server program and run it again immediately. */
- setsockopt(listen_fd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse));
+ /* Fix port can not be used when stop server program and run it again immediately. */
+ setsockopt(listen_fd, 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(listen_fd, (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", listen_fd, 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(listen_fd, (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", listen_fd, LISTEN_PORT);
- /* start listen socket */
- listen(listen_fd, BACKLOG);
+ /* start listen socket */
+ listen(listen_fd, BACKLOG);
- while(1)
- {
- /* accept new incoming socket client */
- printf("\nStart waiting and accept new client connect...\n");
- client_fd = accept(listen_fd, (struct sockaddr*)&cli_addr, &addr_len);
- if(client_fd < 0)
- {
- printf("accept new socket failure: %s\n", strerror(errno));
- return -2;
- }
- printf("Accept new client[%s:%d] with fd [%d]\n", inet_ntoa(cli_addr.sin_addr), ntohs(cli_addr.sin_port), client_fd);
+ while(1)
+ {
+ /* accept new incoming socket client */
+ printf("\nStart waiting and accept new client connect...\n");
+ client_fd = accept(listen_fd, (struct sockaddr*)&cli_addr, &addr_len);
+ if(client_fd < 0)
+ {
+ printf("accept new socket failure: %s\n", strerror(errno));
+ return -2;
+ }
+ printf("Accept new client[%s:%d] with fd [%d]\n", inet_ntoa(cli_addr.sin_addr), ntohs(cli_addr.sin_port), client_fd);
- while(1)
- {
- /* receive message from socket client */
- memset(buf, 0, sizeof(buf));
- if( (rv=read(client_fd, buf, sizeof(buf))) < 0)
- {
- printf("Read data from client socket[%d] failure: %s\n", client_fd, strerror(errno));
- close(client_fd);
- break;
- }
- else if( rv == 0 )
- {
- printf("client socket[%d] disconnected\n", client_fd);
- close(client_fd);
- break;
- }
+ while(1)
+ {
+ /* receive message from socket client */
+ memset(buf, 0, sizeof(buf));
+ if( (rv=read(client_fd, buf, sizeof(buf))) < 0)
+ {
+ printf("Read data from client socket[%d] failure: %s\n", client_fd, strerror(errno));
+ close(client_fd);
+ break;
+ }
+ else if( rv == 0 )
+ {
+ printf("client socket[%d] disconnected\n", client_fd);
+ close(client_fd);
+ break;
+ }
- printf("Read [%d] bytes data from socket client[%d]: %s\n", rv, client_fd, buf);
+ printf("Read [%d] bytes data from socket client[%d]: %s\n", rv, client_fd, 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( write(client_fd, buf, strlen(buf)) < 0 )
- {
- printf("Reply back to socket client[%d] failure: %s\n", client_fd, strerror(errno));
- close(client_fd);
- }
- 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( write(client_fd, buf, strlen(buf)) < 0 )
+ {
+ printf("Reply back to socket client[%d] failure: %s\n", client_fd, strerror(errno));
+ close(client_fd);
+ }
+ printf("\n");
+ }
- close(client_fd);
- }
+ close(client_fd);
+ }
- close(listen_fd);
- return 0;
+ close(listen_fd);
+ return 0;
}
diff --git a/ch2_socket/sockudp_client.c b/ch2_socket/sockudp_client.c
index ebe318b..3674339 100644
--- a/ch2_socket/sockudp_client.c
+++ b/ch2_socket/sockudp_client.c
@@ -1,13 +1,13 @@
/*********************************************************************************
- * Copyright: (C) 2018 LingYun IoT Studio
- * All rights reserved.
+ * Copyright: (C) 2018 LingYun IoT Studio
+ * All rights reserved.
*
- * Filename: sockudp_client.c
- * Description: This file is UDP socket client example source code.
+ * Filename: sockudp_client.c
+ * Description: This file is UDP socket client example source code.
*
- * Version: 1.0.0(10/23/2018)
- * Author: Guo Wenxue <guowenxue@gmail.com>
- * ChangeLog: 1, Release initial version on "2018-10-23 01:38:08 PM"
+ * Version: 1.0.0(10/23/2018)
+ * Author: Guo Wenxue <guowenxue@gmail.com>
+ * ChangeLog: 1, Release initial version on "2018-10-23 01:38:08 PM"
*
********************************************************************************/
#include <stdio.h>
@@ -20,59 +20,59 @@
#include <netinet/in.h>
#include <arpa/inet.h>
-#define SERVER_IP "127.0.0.1"
-#define SERVER_PORT 8890
+#define SERVER_IP "127.0.0.1"
+#define SERVER_PORT 8890
int main(int argc, char **argv)
{
- int sockfd = -1;
- int rv = -1;
- char buf[1024];
- struct sockaddr_in serv_addr;
- socklen_t addrlen = sizeof(serv_addr);
- float temp;
+ int sockfd = -1;
+ int rv = -1;
+ char buf[1024];
+ struct sockaddr_in serv_addr;
+ socklen_t addrlen = sizeof(serv_addr);
+ float temp;
- /* create UDP socket */
- sockfd = socket(AF_INET, SOCK_DGRAM, 0);
- if(sockfd < 0)
- {
- printf("create socket failure: %s\n", strerror(errno));
- return -1;
- }
+ /* create UDP socket */
+ sockfd = socket(AF_INET, SOCK_DGRAM, 0);
+ if(sockfd < 0)
+ {
+ printf("create socket failure: %s\n", strerror(errno));
+ return -1;
+ }
- /* set socket server information */
- memset(&serv_addr, 0, sizeof(serv_addr));
- serv_addr.sin_family = AF_INET;
- serv_addr.sin_port = htons(SERVER_PORT);
- inet_aton( SERVER_IP, &serv_addr.sin_addr );
+ /* set socket server information */
+ memset(&serv_addr, 0, sizeof(serv_addr));
+ serv_addr.sin_family = AF_INET;
+ serv_addr.sin_port = htons(SERVER_PORT);
+ inet_aton( SERVER_IP, &serv_addr.sin_addr );
- while(1)
- {
- /* send message to socket server */
- strncpy(buf, "Hello, LingYun IoT socket server!", sizeof(buf));
- if( sendto(sockfd, buf, strlen(buf), 0, (struct sockaddr *)&serv_addr, addrlen) < 0 )
- {
- printf("Write data to server [%s:%d] failure: %s\n", SERVER_IP, SERVER_PORT, strerror(errno));
- break;
- }
- printf("Send message to socket server okay\n");
+ while(1)
+ {
+ /* send message to socket server */
+ strncpy(buf, "Hello, LingYun IoT socket server!", sizeof(buf));
+ if( sendto(sockfd, buf, strlen(buf), 0, (struct sockaddr *)&serv_addr, addrlen) < 0 )
+ {
+ printf("Write data to server [%s:%d] failure: %s\n", SERVER_IP, SERVER_PORT, strerror(errno));
+ break;
+ }
+ printf("Send message to socket server okay\n");
- /* receive message from socket server */
- memset(buf, 0, sizeof(buf));
- printf("Wating reply from socket server...\n");
- rv = recvfrom(sockfd, buf, sizeof(buf), 0, (struct sockaddr *)&serv_addr, &addrlen);
- if(rv < 0)
- {
- printf("Read data from server failure: %s\n", strerror(errno));
- break;
- }
- printf("Receive [%d] bytes data from server: %s", rv, buf);
- printf("\n");
+ /* receive message from socket server */
+ memset(buf, 0, sizeof(buf));
+ printf("Wating reply from socket server...\n");
+ rv = recvfrom(sockfd, buf, sizeof(buf), 0, (struct sockaddr *)&serv_addr, &addrlen);
+ if(rv < 0)
+ {
+ printf("Read data from server failure: %s\n", strerror(errno));
+ break;
+ }
+ printf("Receive [%d] bytes data from server: %s", rv, buf);
+ printf("\n");
- sleep(3);
- }
+ sleep(3);
+ }
- close(sockfd);
- return 0;
+ close(sockfd);
+ return 0;
}
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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