FTP客户端和服务器源代码C语言实现要点

1、课程设计：FTP的设计与实现/*client.c*/#include <winsock2.h>#include <stdio.h>#include <stdlib.h>#pragma comment(lib,"ws2_32.lib")#define DEFAULT_PORT        2302#define DEFAULT_BUFFER      2048#define DEFAULT_MESSAGE &#

2、160;   "This is a test of the emergency broadcasting system"char szServerip128,          / Server to connect to      szMessage1024;        / Message to send to severint&#

3、160;  iPort     = DEFAULT_PORT; / Port on server to connect to/DWORD dwCount   = DEFAULT_COUNT; / Number of times to send messageBOOL bSendOnly = FALSE;         / Send data only; don't receiveint dirfun();int ge

4、tfun();int putfun();int pwdfun();int cdfun();int mdfun();int delfun();int usafun(); void usage()    printf("usage: client -p:x -s:IP -n:x -onn");    printf("       -p:x      Remote port to send t

5、on");    printf("       -s:IP     Server's IP address or hostnamen");    printf("       -n:x      Number of times to send messagen");

6、60;   printf("       -o        Send messages only; don't receiven");    ExitProcess(1);void ValidateArgs(int argc, char *argv)    int        

7、        i;     for(i = 1; i < argc; i+)            if (argvi0 = '-') | (argvi0 = '/')                

8、    switch (tolower(argvi1)                            case 'p':        / Remote port    

9、60;               if (strlen(argvi) > 3)                        iPort = atoi(&argvi3);   

10、0;                break;                case 's':       / Server        

11、            if (strlen(argvi) > 3)                        strcpy(szServerip, &argvi3);      &

12、#160;             break;                case 'n':       / Number of times to send message      &#

13、160;             if (strlen(argvi) > 3)                        /dwCount = atol(&argvi3);     

14、               break;               case 'o':       / Only send message; don't receive    

15、60;               bSendOnly = TRUE;                    break;            &#

16、160;   default:                    usage();                    break;     &

17、#160;                  int main(int argc, char *argv)    WSADATA       wsd;    SOCKET        sClient;    char 

18、         szBufferDEFAULT_BUFFER;    int           ret;    /unsigned int           i;     /int j;  &#

19、160; struct sockaddr_in server;    struct hostent    *host = NULL;     char choice5,choice240;    / Parse the command line and load Winsock    /     argv1="-s:"   

20、60; strcpy(szServerip, &argv13);    /ValidateArgs(argc, argv);    if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)            printf("Failed to load Winsock library!n");      

21、0; return 1;        /strcpy(szMessage, DEFAULT_MESSAGE);    /    / Create the socket, and attempt to connect to the server    /    sClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);    if (sCli

22、ent = INVALID_SOCKET)            printf("socket() failed: %dn", WSAGetLastError();        return 1;        server.sin_family = AF_INET;    server.sin_port = hto

23、ns(iPort);     printf("server.sin_port=%un",server.sin_port);    server.sin_addr.s_addr = inet_addr(szServerip);   /    / If the supplied server address wasn't in the form    / "aaa.bbb.ccc.ddd" i

24、t's a hostname, so try to resolve it    /    if (server.sin_addr.s_addr = INADDR_NONE)            host = gethostbyname(szServerip);        if (host = NULL)     &

25、#160;              printf("Unable to resolve server: %sn", szServerip);            return 1;              

26、;  CopyMemory(&server.sin_addr, host->h_addr_list0,            host->h_length);        if (connect(sClient, (struct sockaddr *)&server,         sizeof(server) =

27、SOCKET_ERROR)            printf("connect() failed: %dn", WSAGetLastError();        return 1;        /显示接通信息     /     /  

28、0;  /for(j=0;j<2;j+)     /                  ret = recv(sClient, szBuffer, DEFAULT_BUFFER, 0);            if (ret = 0)    &

29、#160;   / Graceful close                return 0;            else if (ret = SOCKET_ERROR)            

30、0;               printf("recv() failed: %dn", WSAGetLastError();                return 0;         &#

31、160;              szBufferret = '0'              printf("%sn",szBuffer);              if(ret

32、<15)                                 ret = recv(sClient, szBuffer, DEFAULT_BUFFER, 0);         &#

33、160;         if (ret = 0)        / Graceful close                       return 0;     

34、0;             else if (ret = SOCKET_ERROR)                                 

35、0;        /printf("recv() failed: %dn", WSAGetLastError();                       return 0;         &

36、#160;                            szBufferret = '0'                   pri

37、ntf("%sn",szBuffer);                            /printf("DEFAULT_BUFFER=%dn",DEFAULT_BUFFER);           w

38、hile(1)                  puts("-");         printf("ftp> ");         scanf("%s", choice);    

39、;                       if(strncmp(choice,"dir",3)=0|strncmp(choice,"DIR",2)=0)                 

40、0;     dirfun(sClient);              continue;                           else if(strncmp(choice

41、,"pwd",3)=0|strncmp(choice,"PWD",3)=0)                                  pwdfun(sClient);     &#

42、160;             continue;                            else if(strncmp(choice,"?",1)=0)  &#

43、160;                              usafun(sClient);                   c

44、ontinue;                            else if(strncmp(choice,"quit",4)=0|strncmp(choice,"QUIT",2)=0)        

45、0;                        break;                           

46、scanf("%s", choice2);              if(strncmp(choice,"get",3)=0|strncmp(choice,"GET",3)=0)                    

47、             getfun(sClient,choice2);                   continue;               

48、             else if(strncmp(choice,"put",3)=0|strncmp(choice,"PUT",3)=0)                         &#

49、160;       putfun(sClient,choice2);                   continue;                    &#

50、160;        else if(strncmp(choice,"cd",2)=0|strncmp(choice,"CD",2)=0)                              

51、   cdfun(sClient,choice2);                   continue;                         &

52、#160;  else if(strncmp(choice,"md",2)=0|strncmp(choice,"MD",2)=0)                                 mdfun(sClient,choice2)

53、;                   continue;                            else if(strncmp(choice,

54、"del",3)=0|strncmp(choice,"DEL",3)=0)                                 delfun(sClient,choice2);     &

55、#160;             continue;                        /else         puts("输入错误，请重新输入&quo

56、t;);         fflush(stdin);         fflush(stdin);         printf("n");            printf("n");  

57、60;       closesocket(sClient);     WSACleanup();    return 0;int dirfun(SOCKET sClient)         int ret;         char *MSG="dir$"char szBuffer80;

58、0;        strcpy(szMessage, MSG);          ret = send(sClient, szMessage, strlen(szMessage), 0);        if (ret = 0)            re

59、turn 1;        else if (ret = SOCKET_ERROR)                    printf("send() failed: %dn", WSAGetLastError();         &

60、#160;  return 1;                /printf("Send %d bytesn", ret);         /printf("bSendOnly=%dn",bSendOnly);        while(!bSendOnl

61、y)                      /读取流并显示                       /ret = recv(sClient, szBuffer, 80, 0);

62、60;             /printf("%s",szBuffer);            ret = recv(sClient, szBuffer, 80, 0);            if (ret = 0) &#

63、160;      / Graceful close                return 1;            else if (ret = SOCKET_ERROR)         

64、                   printf("recv() failed: %dn", WSAGetLastError();                return 1;      

65、60;                 szBufferret = '0'                               

66、0;                   if(strncmp(szBuffer,"226 Close",strlen("226 Close")=0)                     

67、;            break;                            printf("%s",szBuffer);      

68、        if(strncmp(szBuffer,"500 Syntax error",strlen("500 Syntax error")=0)                             

69、    break;                                          return 0;int getfun(SOCKET sClient,char fil

70、ename40)         int ret;         FILE *fpre;         char szBuffer80;          szMessage0='0'      &#

71、160;  strcat(szMessage, "get$");         /strcat(szMessage, "");         strcat(szMessage,filename);         /printf("MSG4=%cn",szMessage4); 

72、;                 /szMessage0='g'szMessage1='e'szMessage2='t'         /         /szMessage4='m'szMessage5='e&

73、#39;szMessage6='.'szMessage7='t'         /         /szMessage8='x'szMessage9='t'szMessage10='0'        ret = send(sClient, szMessage, strlen(szMe

74、ssage)+1, 0);        if (ret = 0)            return 1;        else if (ret = SOCKET_ERROR)               

75、     printf("send() failed: %dn", WSAGetLastError();            return 1;                printf("Send %d bytesn", ret);  

76、0;      ret = recv(sClient, szBuffer, 80, 0);      /*if (ret = 0)        / Graceful close                break;     

77、;    else if (ret = SOCKET_ERROR)                       printf("recv() failed: %dn", WSAGetLastError();           &

78、#160;  break;         */        szBufferret = '0'         printf("%sn",szBuffer);         if(strncmp( szBuffer,"125 T

79、ransfering.",strlen("125 Transfering.") )=0)                       if( (fpre=fopen(filename,"w") = NULL )           

80、;                      printf("open errer");                   return 1;    

81、0;                       printf("bSendOnly=%dn",bSendOnly);              while(!bSendOnly)     

82、                            /读取流并显示                   ret = recv(sClient, szBuff

83、er, 80, 0);                   if (ret = 0)        / Graceful close                  &

84、#160;    return 1;                   else if (ret = SOCKET_ERROR)                      

85、60;                   printf("recv() failed: %dn", WSAGetLastError();                      

86、; return 1;                                      szBufferret = '0'       

87、0;                              /printf("%s",szBuffer);                

88、0;               if(strncmp(szBuffer,"226 Transfer",strlen("226 Transfer")=0)                       

89、                   break;                               

90、0;      if(strncmp(szBuffer,"500 Syntax error",strlen("500 Syntax error")=0)                              

91、0;           break;                                      fprintf(fpre,

92、"%s",szBuffer);                            printf("%sn",szBuffer);              fclos

93、e(fpre);              return 0;int putfun(SOCKET sClient,char filename40)         int ret;/int i;         FILE *fpse;/char *filename;    

94、60;    /char *MSG="get0me.txt"                  char szBuffer80,temp_buffer80;         /sprintf(szMessage, "get0","te.txt0"); 

95、0;       szMessage0='0'         strcat(szMessage, "put$");         strcat(szMessage,filename);        ret = send(sClient, szMessage, strl

96、en(szMessage)+1, 0);        if (ret = 0)            return 0;        else if (ret = SOCKET_ERROR)              

97、;      printf("send() failed: %dn", WSAGetLastError();            return 1;                /printf("Send %d bytesn", ret); &#

98、160;       /filename="me.txt"         printf("filename=%sn",filename);         if( (fpse=fopen(filename,"r") = NULL )       &

99、#160;               printf("open errer");              return 1;                 

100、; else                       printf("The file %s found,ready to transfer.n",filename);              /i=0;  

101、60;           while (fgets(temp_buffer,80,fpse)!=NULL)                                 sprintf(

102、szBuffer,"%s",temp_buffer);                    send(sClient, szBuffer, 80, 0);                     &

103、#160;          sprintf(szBuffer, "226 Transfer completed. rn");             ret = send(sClient, szBuffer, strlen(szBuffer), 0);          fclose(fpse);

104、         return 0;int pwdfun(SOCKET sClient)     int ret;     char *MSG="pwd$"     char szBuffer160;     strcpy(szMessage, MSG);     ret = send(sClien

105、t, szMessage, strlen(szMessage), 0);    if (ret = 0)         return 1;     else if (ret = SOCKET_ERROR)                     printf

106、("send() failed: %dn", WSAGetLastError();            return 1;             printf("Send %d bytesn", ret);     printf("bSendOnly=%dn",bSendOn

107、ly);     while(!bSendOnly)                   /读取流并显示         ret = recv(sClient, szBuffer, 160, 0);         if (ret

108、 = 0)        / Graceful close              return 1;         else if (ret = SOCKET_ERROR)            

109、0;        printf("recv() failed: %dn", WSAGetLastError();            return 1;                  szBufferret = '0'

110、;         printf("%sn",szBuffer);                  if(strncmp(szBuffer,"226 Close",strlen("226 Close")=0)       

111、60;               break;                  if(strncmp(szBuffer,"500 Syntax error",strlen("500 Syntax error")=0)    &

112、#160;                  break;                   return 0;int cdfun(SOCKET sClient,char pathname40)     int ret; 

113、60;            szMessage0='0'         strcat(szMessage, "cd$");         strcat(szMessage,pathname);        ret = send

114、(sClient, szMessage, strlen(szMessage)+1, 0);        if (ret = 0)            return 1;        else if (ret = SOCKET_ERROR)         

115、0;          printf("send() failed: %dn", WSAGetLastError();            return 1;                printf("Send %d byt

116、esn", ret);          return 0;int mdfun(SOCKET sClient,char pathname20)     int ret;char szBuffer160;     /char *MSG="md$"     szMessage0='0'     strcat(szMe

117、ssage, "md$");         /strcat(szMessage, "");     strcat(szMessage,pathname);     /strcpy(szMessage, MSG);          ret = send(sClient, szMessage, strlen(

118、szMessage)+1, 0);        if (ret = 0)            return 1;        else if (ret = SOCKET_ERROR)              &#

119、160;     printf("send() failed: %dn", WSAGetLastError();            return 1;                printf("Send %d bytesn", ret);  

120、      while(!bSendOnly)                      /读取流并显示                     ret = r

121、ecv(sClient, szBuffer, 80, 0);            if (ret = 0)        / Graceful close                return 1;     &#

122、160;      else if (ret = SOCKET_ERROR)                            printf("recv() failed: %dn", WSAGetLastError();   

123、0;            return 1;                        szBufferret = '0'           &#

124、160;              printf("%s",szBuffer);                           if(strncmp(szBuffer,"226 Close&qu

125、ot;,strlen("226 Close")=0)                                 break;           

126、0;                if(strncmp(szBuffer,"500 Syntax error",strlen("500 Syntax error")=0)                     

127、60;           break;                                         

128、; return 0;int delfun(SOCKET sClient,char name20)     int ret;char szBuffer80;     szMessage0='0'     strcat(szMessage, "del$");      strcat(szMessage,name);     ret = send(sCli

129、ent, szMessage, strlen(szMessage)+1, 0);    if (ret = 0)         return 1;     else if (ret = SOCKET_ERROR)              printf("send() failed: %dn", WSAGe

130、tLastError();         return 1;          printf("Send %d bytesn", ret);     while(!bSendOnly)             ret = recv(sClient, szBuffer,

131、 80, 0);         if (ret = 0)        / Graceful close              return 1;         else if (ret = SOCKET_ERROR) &

132、#160;                       printf("recv() failed: %dn", WSAGetLastError();                return 1; 

133、0;                   szBufferret = '0'                       if(strncmp(szBuffer,"del ok",strlen(&