From 6463eea09ba3bd9008a87027e97670647cb196b5 Mon Sep 17 00:00:00 2001
From: ningling <2907616355@qq.com>
Date: Tue, 9 May 2023 08:27:53 +0000
Subject: [PATCH] add 6/server.c.

Signed-off-by: ningling <2907616355@qq.com>
---
 6/server.c | 71 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100644 6/server.c

diff --git a/6/server.c b/6/server.c
new file mode 100644
index 0000000..5350de0
--- /dev/null
+++ b/6/server.c
@@ -0,0 +1,71 @@
+#include<stdio.h>
+#include<stdlib.h>
+#include<unistd.h>
+#include<errno.h>
+#include<sys/types.h>
+#include<sys/socket.h>
+#include<netinet/in.h>
+#include<string.h>
+ 
+#define MYPORT 8887
+ 
+ 
+#define ERR_EXIT(m) 
+    do { 
+    perror(m); 
+    exit(EXIT_FAILURE); 
+    } while (0)
+ 
+void echo_ser(int sock)
+{
+    char recvbuf[1024] = {0};
+    struct sockaddr_in peeraddr;
+    socklen_t peerlen;
+    int n;
+    
+    while (1)
+    {
+        
+        peerlen = sizeof(peeraddr);
+        memset(recvbuf, 0, sizeof(recvbuf));
+        n = recvfrom(sock, recvbuf, sizeof(recvbuf), 0,
+                     (struct sockaddr *)&peeraddr, &peerlen);
+        if (n <= 0)
+        {
+            
+            if (errno == EINTR)
+                continue;
+            
+            ERR_EXIT("recvfrom error");
+        }
+        else if(n > 0)
+        {
+            printf("接收到的数据：%s\n",recvbuf);
+            sendto(sock, recvbuf, n, 0,
+                   (struct sockaddr *)&peeraddr, peerlen);
+            printf("回送的数据：%s\n",recvbuf);
+        }
+    }
+    close(sock);
+}
+ 
+int main(void)
+{
+    int sock;
+    if ((sock = socket(PF_INET, SOCK_DGRAM, 0)) < 0)
+        ERR_EXIT("socket error");
+    
+    struct sockaddr_in servaddr;
+    memset(&servaddr, 0, sizeof(servaddr));
+    servaddr.sin_family = AF_INET;
+    servaddr.sin_port = htons(MYPORT);
+    servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
+    
+    printf("监听%d端口\n",MYPORT);
+    if (bind(sock, (struct sockaddr *)&servaddr, sizeof(servaddr)) < 0)
+        ERR_EXIT("bind error");
+    
+    echo_ser(sock);
+    
+    return 0;
+}
\ No newline at end of file
-- 
Gitee