使用socket編寫pop3客戶端

1、項(xiàng)目分析設(shè)計(jì)文檔使用socket編寫pop3客戶端課程名稱基礎(chǔ)實(shí)踐專 業(yè)計(jì)科班 級學(xué) 號(hào)姓 名11111撰寫時(shí)間： 2015 年 9 月 9 日【項(xiàng)目構(gòu)思】使用socket編寫pop3客戶端【項(xiàng)目設(shè)計(jì)】#include #include#include#include#pragma comment(lib,ws2_32.lib)#define MAX_SIZE 128 /定義可以接收的最大字符串長度main(int argc, char *argv)/變量聲明WSADATA wsaData;int sock;char hostName128; /服務(wù)器IPstruct hostent* pHo

2、st; struct sockaddr_in servAddr; /服務(wù)器端地址int byteRcvd; /recv函數(shù)接收到的字節(jié)數(shù)char respondFromServerMAX_SIZE; char resStringMAX_SIZE; char commandMAX_SIZE;char mailBufMAX_SIZE;int i;/加載Winsock DLLif(WSAStartup(MAKEWORD(2,2),&wsaData)!=0)printf(初始化winsock失敗n);exit(0);/建立Socketsock=socket(PF_INET,SOCK_STREAM,IP

3、PROTO_TCP);if(sock=INVALID_SOCKET)printf(創(chuàng)建socket失敗n);WSACleanup();exit(0);/從控制臺(tái)輸入服務(wù)器端的域名地址 printf(請輸入pop3服務(wù)器的域名地址：n);scanf(%s,hostName); pHost=gethostbyname(hostName);/構(gòu)造服務(wù)器端的地址結(jié)構(gòu)，用于與服務(wù)器的連接memset(&servAddr,0,sizeof(servAddr);/結(jié)構(gòu)體清零servAddr.sin_family=AF_INET;/servAddr.sin_addr.s_addr = inet_addr(ho

4、stIP);servAddr.sin_addr.s_addr = (*(struct in_addr*)pHost-h_addr).s_addr;servAddr.sin_port=htons(110); /連接服務(wù)器if(connect(sock,(struct sockaddr *)&servAddr,sizeof(servAddr)=SOCKET_ERROR )printf(連接建立失敗n);closesocket(sock);WSACleanup();exit(0);/接收服務(wù)器響應(yīng)byteRcvd = recv(sock,respondFromServer,MAX_SIZE,0);i

5、f(byteRcvd = SOCKET_ERROR) printf(連接響應(yīng)失敗n);closesocket(sock);WSACleanup();exit(0);elseif(memcmp(respondFromServer,-ERR,4)=0)printf(連接錯(cuò)誤n);closesocket(sock);WSACleanup();exit(0);elseprintf(服務(wù)器響應(yīng)：); for(i=0;ibyteRcvd;i+)printf(%c,respondFromServeri);printf(n);/驗(yàn)證用戶名memset(resString, 0, sizeof(resStrin

6、g);/信息清空 memset(command,0,MAX_SIZE);printf(請輸入用戶名:n);scanf(%s,resString); memcpy(command,USER ,strlen(USER ); memcpy(command+strlen(USER ),resString,strlen(resString); memcpy(command+strlen(USER )+strlen(resString),rn,2);send(sock,command,strlen(command),0);byteRcvd = recv(sock,respondFromServer,MAX

7、_SIZE,0);if(byteRcvd = SOCKET_ERROR) printf(socket錯(cuò)誤n);closesocket(sock);WSACleanup();exit(0);elseif(memcmp(respondFromServer,-ERR,4)=0)printf(用戶名錯(cuò)誤n);closesocket(sock);WSACleanup();exit(0);elseprintf(服務(wù)器響應(yīng)：);for(i=0;ibyteRcvd;i+)printf(%c,respondFromServeri);printf(n);/驗(yàn)證密碼memset(resString, 0, size

8、of(resString);/信息清空 memset(command,0,MAX_SIZE);printf(請輸入密碼:n);i=0;while(resStringi=getch() if(resStringi=13) printf(n); break; if(resStringi!=b) printf(*); i+; else printf(b b); i-; resStringi=0; memcpy(command,PASS ,strlen(PASS ); memcpy(command+strlen(PASS ),resString,strlen(resString); memcpy(co

9、mmand+strlen(PASS )+strlen(resString),rn,2);send(sock,command,strlen(command),0);byteRcvd = recv(sock,respondFromServer,MAX_SIZE,0);if(byteRcvd = SOCKET_ERROR) printf(socket錯(cuò)誤n);closesocket(sock);WSACleanup();exit(0);elseif(memcmp(respondFromServer,-ERR,4)=0)printf(密碼錯(cuò)誤n);closesocket(sock);WSACleanu

10、p();exit(0);elseprintf(服務(wù)器響應(yīng)：);for(i=0;ibyteRcvd;i+)printf(%c,respondFromServeri);printf(n); /顯示郵件數(shù)目memset(resString, 0, sizeof(resString);/信息清空 memset(command,0,MAX_SIZE);memcpy(command,STAT ,strlen(STAT);memcpy(command+strlen(STAT),rn,2);printf(%s,command);send(sock,command,strlen(command),0);byte

11、Rcvd = recv(sock,respondFromServer,MAX_SIZE,0);if(byteRcvd = SOCKET_ERROR) printf(socket錯(cuò)誤n);closesocket(sock);WSACleanup();exit(0);elseif(memcmp(respondFromServer,-ERR,4)=0)printf(應(yīng)答錯(cuò)誤n);closesocket(sock);WSACleanup();exit(0);elseprintf(服務(wù)器響應(yīng)：);for(i=0;ibyteRcvd;i+)printf(%c,respondFromServeri);pri

12、ntf(n);/返回指定郵件的內(nèi)容/*memset(resString, 0, sizeof(resString);/信息清空 memset(command,0,MAX_SIZE);memcpy(command,RETR ,strlen(RETR );memcpy(command+strlen(RETR ),4rn,3);printf(%s,command);send(sock,command,strlen(command),0);byteRcvd = recv(sock,respondFromServer,MAX_SIZE,0);if(byteRcvd = SOCKET_ERROR) printf(socket錯(cuò)誤n);closesocket(sock);WSACleanup();exit(0);elseif(memcmp(respondFromServer,-ERR,4)=0)printf(應(yīng)答錯(cuò)誤n);closesocket(sock);WSACleanup();exit(0);elseprintf(服務(wù)器響應(yīng)：);for(i=0;ibyteRcvd;i+)printf(%c,respondFromServeri);printf(n);while(1)memset(mailBuf,0,MAX_SIZE);byteRcvd = recv(sock,mailBuf,MAX