FTP in C: 331 / 530 Please specify password -

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i have issue sending pass command in c, writing simple program connects ftp server , prints out list stdout.

/* -----------  set connection ---------*/ //creating socket if((sock=socket(af_inet,sock_stream,0))<0) {     perror("main: creating socket:");     return error; }  //zero out addr memset(&addr, 0, sizeof(addr));  //getting host name hptr=gethostbyname(url.host); if(hptr==null) {      perror("error while getting host name:");     return error; }  //setting addr connect addr.sin_addr.s_addr = inet_addr(inet_ntoa(*((struct in_addr *)hptr->h_addr_list[0])));  addr.sin_family = af_inet; addr.sin_port = htons(url.port); if((connect(sock, (struct sockaddr *)&addr, sizeof(struct sockaddr))) < 0) {     perror("error: connect socket :");     close(sock);     return error; }  //wait service ready bzero(buffer, maxbuf); if(recv(sock, buffer, sizeof(buffer),0)<0) {         perror("error while receiving socket:"); }  printf("%s", buffer);  /* -----     login user     -----------*/ bzero(buffer, maxbuf); //setup login strcpy(buffer,"user "); strcat(buffer,url.user); strcat(buffer,"\n");  //send login if((send(sock,buffer,maxbuf,0))<0) {     perror("error while sending socket:"); } //receive answer if((recv(sock, buffer, sizeof(buffer),0))<0) {     perror("error while recieving socket:"); } printf("%s", buffer);   //send password bzero(buffer, maxbuf); //setup password strcpy(buffer,"pass "); strcat(buffer,url.pass); strcat(buffer,"\n"); printf("%s",buffer); //send password  if((send(sock,buffer,maxbuf,0))<0) {     perror("error while sending socket:"); } //receive response  if((recv(sock, buffer, sizeof(buffer),0))<0) {     perror("error while recieving socket:"); } printf("%s", buffer);  close(sock); return ok;

now succesfully parse adress in launch parameter.

and succesfully connect want to: 220 back.

after sending char *buffer[1024]; contains: "user anonymous\r\n" or "user anonymous\n" ftp response 331 please specify password.

after try send: "pass secret\r\n" or "pass secret\r\n" , 530

the username anonymous , password secret. tested using ftp , connect sending pass wrong? or doing whole communication wrong?

try using \r\n line end, e.g. write in explanation unlike in code.


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