fix: missing lab7

docs/undergraduate/软件工程学院/计算机网络/lab/lab7/client.c

@@ -1,69 +0,0 @@
-/* Source: Peterson & Davie (2007), Computer Networks, a Systems Approach,
- *           4th ed., Morgan Kaufmann, p. 34-35.
- * Included stdlib.h, string.h, and strings.h so it compiles on Linux.
- * Changed port from 5432 (postgresql) to 7701 (unassigned).
- * - JLND Feb 7 2009
- */
-#include<unistd.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <string.h>
-#include <strings.h>
-#include <stdio.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <netdb.h>
-#define SERVER_PORT 7701
-#define MAX_LINE 256
-
-int
-main(int argc, char * argv[])
-{
-  FILE *fp;
-  struct hostent *hp;
-  struct sockaddr_in sin;
-  char *host;
-  char buf[MAX_LINE];
-  int s;
-  int len;
-
-  if (argc==2) {
-    host = argv[1];
-  }
-  else {
-    fprintf(stderr, "usage: simplex-talk host\n");
-    exit(1);
-  }
-
-  /* translate host name into peer’s IP address */
-  hp = gethostbyname(host);
-  if (!hp) {
-    fprintf(stderr, "simplex-talk: unknown host: %s\n", host);
-    exit(1);
-  }
-
-  /* build address data structure */
-  bzero((char *)&sin, sizeof(sin));
-  sin.sin_family = AF_INET;
-  bcopy(hp->h_addr, (char *)&sin.sin_addr, hp->h_length);
-  sin.sin_port = htons(SERVER_PORT);
-
-  /* active open */
-  if ((s = socket(PF_INET, SOCK_STREAM, 0)) < 0) {
-    perror("simplex-talk: socket");
-    exit(1);
-  }
-  if (connect(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
-    perror("simplex-talk: connect");
-    close(s);
-    exit(1);
-  }
-
-  /* main loop: get and send lines of text */
-  while (fgets(buf, sizeof(buf), stdin)) {
-    buf[MAX_LINE-1] = '\0';
-    len = strlen(buf) + 1;
-    send(s, buf, len, 0);
-  }
-}

docs/undergraduate/软件工程学院/计算机网络/lab/lab7/lib7.md

@@ -1,9 +1,8 @@
-# <center>华东师范大学软件学院实验报告</center>
+---
+title: Lab7 - Socket Programming
+---
 
-| **实验课程：** 计算机网络         | **年级:** 2024         | **实验成绩：**            |
+# 华东师范大学软件学院实验报告
-| :-------------------------------- | :--------------------- | :------------------------ |
-| **实验名称：** Socket Programming | **姓名：**       | **实验日期：** 2025.01.03 |
-| **实验编号：** 7                  | **学号：**  | **实验时间：** 2学时      |
 
 ## 一、实验目的
 
@@ -39,7 +38,7 @@
 
 3. 启动0号客户端,此时 Wireshark 捕获到三次握手包，观察到0号客户端采用44514端口：
 
-![png1](./lib7-2.png)
+    ![png1](./lib7-2.png)
 
 4. 发送文本测试
 
@@ -163,7 +162,7 @@
  * Changed port from 5432 (postgresql) to 7701 (unassigned).
  * - JLND Feb 7 2009
  */
-#include<unistd.h>
+#include <unistd.h>
 #include <unistd.h>
 #include <stdlib.h>
 #include <string.h>
@@ -176,8 +175,7 @@
 #define SERVER_PORT 7701
 #define MAX_LINE 256
 
-int
+int main(int argc, char * argv[])
-main(int argc, char * argv[])
 {
   FILE *fp;
   struct hostent *hp;
@@ -237,7 +235,7 @@ main(int argc, char * argv[])
  * Changed port from 5432 (postgresql) to 7701 (unassigned).
  * - JLND Feb 7 2009
  */
-#include<unistd.h>
+#include <unistd.h>
 #include <stdlib.h>
 #include <string.h>
 #include <strings.h>
@@ -250,8 +248,7 @@ main(int argc, char * argv[])
 #define MAX_PENDING 5
 #define MAX_LINE 256
 
-int
+int main()
-main()
 {
   struct sockaddr_in sin;
   char buf[MAX_LINE];

docs/undergraduate/软件工程学院/计算机网络/lab/lab7/server.c

@@ -1,55 +0,0 @@
-/* Source: Peterson & Davie (2007), Computer Networks, a Systems Approach,
- *           4th ed., Morgan Kaufmann, p. 35-36.
- * Included stdlib.h, string.h, and strings.h so it compiles on Linux.
- * Changed port from 5432 (postgresql) to 7701 (unassigned).
- * - JLND Feb 7 2009
- */
-#include<unistd.h>
-#include <stdlib.h>
-#include <string.h>
-#include <strings.h>
-#include <stdio.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <netdb.h>
-#define SERVER_PORT 7701
-#define MAX_PENDING 5
-#define MAX_LINE 256
-
-int
-main()
-{
-  struct sockaddr_in sin;
-  char buf[MAX_LINE];
-  int len;
-  int s, new_s;
-
-  /* build address data structure */
-  bzero((char *)&sin, sizeof(sin));
-  sin.sin_family = AF_INET;
-  sin.sin_addr.s_addr = INADDR_ANY;
-  sin.sin_port = htons(SERVER_PORT);
- 
-  /* setup passive open */
-  if ((s = socket(PF_INET, SOCK_STREAM, 0)) < 0) {
-    perror("simplex-talk: socket");
-    exit(1);
-  }
-  if ((bind(s, (struct sockaddr *)&sin, sizeof(sin))) < 0) {
-    perror("simplex-talk: bind");
-    exit(1);
-  }
-  listen(s, MAX_PENDING);
- 
-  /* wait for connection, then receive and print text */
-  while(1) {
-    if ((new_s = accept(s, (struct sockaddr *)&sin, &len)) < 0) {
-      perror("simplex-talk: accept");
-      exit(1);
-    }
-    while (len = recv(new_s, buf, sizeof(buf), 0))
-      fputs(buf, stdout);	
-    close(new_s);
-  }
-}