江南大学实验报告_服务器与客户端间通信

江南大学物联网工程学院实验报告 课程名称 TCP IP 网络编程设计 实验名称 服务器与客户端间通信 实验日期 班级 计科 姓名 学号 实验报告要求 1 实验名称 2 实验要求 3 实验环境 4 实验步骤 写明实验结果 5 实验体会 服务器主程序 SERVER 服务器端 include include pragma comment lib ws2 32 lib include include define DEFAULT PORT 5050 define BUFFER LENGTH 1024 struct recv info char info from 20 char info content 512 struct file name 用于存储文件中读取的用户名 char name 20 struct ipp 用于存储当前登录的用户的用户名和 ip char name 20 char ip 20 struct zhuce char str 10 char name 20 struct loginuser char str 10 char name 20 void main struct recv info info2 struct ipp ipaddress 30 struct zhuce zhuce1 struct file name filename 30 struct loginuser login user int i 0 控制存入 ip 的个数 int iPort DEFAULT PORT WSADATA wsaData SOCKET sSocket char string int length 4 文件头指针位移向量 FILE fp 文件头指针 unsigned int name num int m 0 用于记录当前登录的用户人数 int c int iLen int iRecv int iSend char str 5 char recv buf BUFFER LENGTH struct sockaddr in server client secser memset info2 info from 0 sizeof info2 info from memset info2 info content 0 sizeof info2 info content memset zhuce1 str 0 sizeof zhuce1 str memset zhuce1 name 0 sizeof zhuce1 name memset filename 0 sizeof filename memset memset ipaddress 0 sizeof ipaddress memset printf Server is waiting n 从文件中读取该服务器上注册的用户名 fp fopen file1 txt rt fscanf fp d fseek fp length 0 将文件输出头指针向下移动四个字节 即用户名存储位置的首地址 for i 0 i name num i length 20 i 4 fseek fp length 0 fgets filename i name sizeof filename i name fp fclose fp printf s n filename i 2 name 经测试已将文件中的内容读取到 filename 中 if WSAStartup MAKEWORD 2 2 return sSocket socket AF INET SOCK DGRAM 0 if sSocket INVALID SOCKET printf socket failed d n WSAGetLastError return server sin family AF INET server sin port htons iPort server sin addr s addr htonl INADDR ANY if bind sSocket LPSOCKADDR d n WSAGetLastError return iLen sizeof client while 1 memset recv buf 0 sizeof recv buf iRecv recvfrom sSocket recv buf BUFFER LENGTH 0 SOCKADDR 注册用户 if strcmp recv buf yes 0 fp fopen file1 txt rt memcpy for c 0 c name num c if strcmp filename c name zhuce1 name 0 break if c name num strcpy filename name num name zhuce1 name 将用户名存入文件中 length 20 name num 4 fseek fp length 0 fwrite filename name num name sizeof filename name num name 1 fp name num fseek fp 0 0 fprintf fp d name num fclose fp printf s 已注册成功 n filename name num 1 name memset recv buf 0 sizeof recv buf continue else if strcmp recv buf no 0 memset recv buf 0 sizeof recv buf continue if strcmp recv buf login 0 memcpy for c 0 c name num c if strcmp filename c name login user name 0 strcpy ipaddress m name login user name strcpy ipaddress m ip inet ntoa client sin addr m printf s 已登录 n login user name 未注册的用户也能收发数据 break if c name num continue memset if iRecv SOCKET ERROR printf recvfrom falied n WSAGetLastError return else if iRecv 0 break else memcpy 判断收到的信息中是不是登录的用户发来的 for int c 0 c name num c if strcmp ipaddress c name info2 info from 0 printf s s n info2 info from info2 info content 发送消息 for int j 0 j m j secser sin family AF INET secser sin port htons iPort secser sin addr s addr inet addr ipaddress j ip iSend sendto sSocket recv buf sizeof recv buf 0 SOCKADDR if iSend SOCKET ERROR printf sendto falied n break else if iSend 0 break closesocket sSocket WSACleanup 客户端主程序代码 CLIENT 客户端 include include include pragma comment lib ws2 32 lib define DEFAULT PORT 5050 define DATA BUFFER 1024 struct send info char info from 20 char info content 256 struct login info char str 10 用于判断客户端请求的内容是登录还是注册 char from name 20 void main struct send info info2 struct login info login info1 memset info2 info from 0 sizeof info2 info from memset info2 info content 0 sizeof info2 info content memset login info1 from name 0 sizeof login info1 from name memset login info1 str 0 sizeof login info1 str WSADATA wsaData SOCKET sClient int iPort 5050 int iLen int iSend int iSendip char str 10 用于登录用户时 用户输入的字符串 char ip 40 char send buf DATA BUFFER struct sockaddr in server printf Client is running n n printf 输入服务器 IP scanf s if WSAStartup MAKEWORD 2 2 return server sin family AF INET server sin port htons iPort server sin addr s addr inet addr ip sClient socket AF INET SOCK DGRAM 0 if sClient INVALID SOCKET printf socket falied return iLen sizeof server while 1 memset printf 是否注册 yes no n scanf s if strcmp str yes 0 printf 输入用户名 scanf s strcpy login info1 str str strcpy login info1 from name info2 info from 测试用 向服务器发送注册信息 memset send buf 0 sizeof send buf memcpy send buf iSendip sendto sClient send buf sizeof send buf 0 struct sockaddr memset send buf 0 sizeof send buf if iSendip SOCKET ERROR printf sendto failed d n WSAGetLastError return else if iSendip 0 return 向服务器发送登录信息 memset str 0 sizeof str memset memset printf 是否登录 yes no n scanf s if strcmp str yes 0 printf 输入用户名 scanf s strcpy login info1 from name info2 info from strcpy login info1 str login memset send buf 0 sizeof send buf 发送登录信息 memcpy send buf iSendip sendto sClient send buf sizeof send buf 0 struct sockaddr memset send buf 0 sizeof send buf if iSendip SOCKET ERROR printf sendto failed d n WSAGetLastError return else if iSendip 0 return break while 1 memset send buf 0 sizeof send buf printf 输入 n scanf s memcpy send buf iSend sendto sClient send buf sizeof send buf 0 struct sockaddr if iSend SOCKET ERROR printf sendto failed d n WSAGetLastError return else if iSend 0 return closesocket sClient WSACleanup 客户端显示程序 客户端显示器 include include pragma comment lib ws2 32 lib include define DEFAULT PORT 5050 define BUFFER LENGTH 1024 struct recv info char info from 20 char info content 512 void main printf Printscreen is running n n struct recv info info3 memset info3 info from 0 sizeof info3 info from memset info3 info content 0 sizeof info3 info content int iPort DEFAULT PORT WSADATA wsaData SOCKET sSocket int iLen int iRecv int iSend char recv buf BUFFER LENGTH struct sockaddr in server client sec